#undef BLOCKMOVE #define Z_WAKE #undef Z_EXT_CHARS_IN_BUFFER #define CY_VERSION "2.5" /* If you need to install more boards than NR_CARDS, change the constant in the definition below. No other change is necessary to support up to eight boards. Beyond that you'll have to extend cy_isa_addresses. */ #define NR_CARDS 4 /* If the total number of ports is larger than NR_PORTS, change this constant in the definition below. No other change is necessary to support more boards/ports. */ #define NR_PORTS 256 #define ZE_V1_NPORTS 64 #define ZO_V1 0 #define ZO_V2 1 #define ZE_V1 2 #define SERIAL_PARANOIA_CHECK #undef CY_DEBUG_OPEN #undef CY_DEBUG_THROTTLE #undef CY_DEBUG_OTHER #undef CY_DEBUG_IO #undef CY_DEBUG_COUNT #undef CY_DEBUG_DTR #undef CY_DEBUG_WAIT_UNTIL_SENT #undef CY_DEBUG_INTERRUPTS #undef CY_16Y_HACK #undef CY_ENABLE_MONITORING #undef CY_PCI_DEBUG /* * Include section */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void cy_throttle(struct tty_struct *tty); static void cy_send_xchar(struct tty_struct *tty, char ch); #define IS_CYC_Z(card) ((card).num_chips == -1) #define Z_FPGA_CHECK(card) \ ((readl(&((struct RUNTIME_9060 __iomem *) \ ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0) #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \ ((card).ctl_addr))->mail_box_0)) || \ Z_FPGA_CHECK(card)) && \ (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \ ((card).base_addr+ID_ADDRESS))->signature))) #ifndef SERIAL_XMIT_SIZE #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096)) #endif #define WAKEUP_CHARS 256 #define STD_COM_FLAGS (0) static struct tty_driver *cy_serial_driver; #ifdef CONFIG_ISA /* This is the address lookup table. The driver will probe for Cyclom-Y/ISA boards at all addresses in here. If you want the driver to probe addresses at a different address, add it to this table. If the driver is probing some other board and causing problems, remove the offending address from this table. The cy_setup function extracts additional addresses from the boot options line. The form is "cyclades=address,address..." */ static unsigned int cy_isa_addresses[] = { 0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000, 0, 0, 0, 0, 0, 0, 0, 0 }; #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses) #ifdef MODULE static long maddr[NR_CARDS]; static int irq[NR_CARDS]; module_param_array(maddr, long, NULL, 0); module_param_array(irq, int, NULL, 0); #endif #endif /* CONFIG_ISA */ /* This is the per-card data structure containing address, irq, number of channels, etc. This driver supports a maximum of NR_CARDS cards. */ static struct cyclades_card cy_card[NR_CARDS]; static int cy_next_channel; /* next minor available */ /* * This is used to look up the divisor speeds and the timeouts * We're normally limited to 15 distinct baud rates. The extra * are accessed via settings in info->flags. * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, * HI VHI * 20 */ static int baud_table[] = { 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, 230400, 0 }; static char baud_co_25[] = { /* 25 MHz clock option table */ /* value => 00 01 02 03 04 */ /* divide by 8 32 128 512 2048 */ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static char baud_bpr_25[] = { /* 25 MHz baud rate period table */ 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15 }; static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */ /* value => 00 01 02 03 04 */ /* divide by 8 32 128 512 2048 */ 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */ 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62, 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32, 0x21 }; static char baud_cor3[] = { /* receive threshold */ 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07, 0x07 }; /* * The Cyclades driver implements HW flow control as any serial driver. * The cyclades_port structure member rflow and the vector rflow_thr * allows us to take advantage of a special feature in the CD1400 to avoid * data loss even when the system interrupt latency is too high. These flags * are to be used only with very special applications. Setting these flags * requires the use of a special cable (DTR and RTS reversed). In the new * CD1400-based boards (rev. 6.00 or later), there is no need for special * cables. */ static char rflow_thr[] = { /* rflow threshold */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a }; /* The Cyclom-Ye has placed the sequential chips in non-sequential * address order. This look-up table overcomes that problem. */ static int cy_chip_offset[] = { 0x0000, 0x0400, 0x0800, 0x0C00, 0x0200, 0x0600, 0x0A00, 0x0E00 }; /* PCI related definitions */ #ifdef CONFIG_PCI static struct pci_device_id cy_pci_dev_id[] __devinitdata = { { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */ { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */ { } /* end of table */ }; MODULE_DEVICE_TABLE(pci, cy_pci_dev_id); #endif static void cy_start(struct tty_struct *); static void set_line_char(struct cyclades_port *); static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32); #ifdef CONFIG_ISA static unsigned detect_isa_irq(void __iomem *); #endif /* CONFIG_ISA */ static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *); #ifndef CONFIG_CYZ_INTR static void cyz_poll(unsigned long); /* The Cyclades-Z polling cycle is defined by this variable */ static long cyz_polling_cycle = CZ_DEF_POLL; static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0); #else /* CONFIG_CYZ_INTR */ static void cyz_rx_restart(unsigned long); static struct timer_list cyz_rx_full_timer[NR_PORTS]; #endif /* CONFIG_CYZ_INTR */ static inline int serial_paranoia_check(struct cyclades_port *info, char *name, const char *routine) { #ifdef SERIAL_PARANOIA_CHECK if (!info) { printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) " "in %s\n", name, routine); return 1; } if (info->magic != CYCLADES_MAGIC) { printk(KERN_WARNING "cyc Warning: bad magic number for serial " "struct (%s) in %s\n", name, routine); return 1; } #endif return 0; } /* serial_paranoia_check */ /* * This routine is used by the interrupt handler to schedule * processing in the software interrupt portion of the driver * (also known as the "bottom half"). This can be called any * number of times for any channel without harm. */ static inline void cy_sched_event(struct cyclades_port *info, int event) { info->event |= 1 << event; /* remember what kind of event and who */ schedule_work(&info->tqueue); } /* cy_sched_event */ /* * This routine is used to handle the "bottom half" processing for the * serial driver, known also the "software interrupt" processing. * This processing is done at the kernel interrupt level, after the * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This * is where time-consuming activities which can not be done in the * interrupt driver proper are done; the interrupt driver schedules * them using cy_sched_event(), and they get done here. * * This is done through one level of indirection--the task queue. * When a hardware interrupt service routine wants service by the * driver's bottom half, it enqueues the appropriate tq_struct (one * per port) to the keventd work queue and sets a request flag * that the work queue be processed. * * Although this may seem unwieldy, it gives the system a way to * pass an argument (in this case the pointer to the cyclades_port * structure) to the bottom half of the driver. Previous kernels * had to poll every port to see if that port needed servicing. */ static void do_softint(struct work_struct *work) { struct cyclades_port *info = container_of(work, struct cyclades_port, tqueue); struct tty_struct *tty; tty = info->tty; if (!tty) return; if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) { tty_hangup(info->tty); wake_up_interruptible(&info->open_wait); info->flags &= ~ASYNC_NORMAL_ACTIVE; } if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) wake_up_interruptible(&info->open_wait); #ifdef CONFIG_CYZ_INTR if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) && !timer_pending(&cyz_rx_full_timer[info->line])) mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1); #endif if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) wake_up_interruptible(&info->delta_msr_wait); tty_wakeup(tty); #ifdef Z_WAKE if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) complete(&info->shutdown_wait); #endif } /* do_softint */ /***********************************************************/ /********* Start of block of Cyclom-Y specific code ********/ /* This routine waits up to 1000 micro-seconds for the previous command to the Cirrus chip to complete and then issues the new command. An error is returned if the previous command didn't finish within the time limit. This function is only called from inside spinlock-protected code. */ static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index) { unsigned int i; /* Check to see that the previous command has completed */ for (i = 0; i < 100; i++) { if (readb(base_addr + (CyCCR << index)) == 0) { break; } udelay(10L); } /* if the CCR never cleared, the previous command didn't finish within the "reasonable time" */ if (i == 100) return -1; /* Issue the new command */ cy_writeb(base_addr + (CyCCR << index), cmd); return 0; } /* cyy_issue_cmd */ #ifdef CONFIG_ISA /* ISA interrupt detection code */ static unsigned detect_isa_irq(void __iomem * address) { int irq; unsigned long irqs, flags; int save_xir, save_car; int index = 0; /* IRQ probing is only for ISA */ /* forget possible initially masked and pending IRQ */ irq = probe_irq_off(probe_irq_on()); /* Clear interrupts on the board first */ cy_writeb(address + (Cy_ClrIntr << index), 0); /* Cy_ClrIntr is 0x1800 */ irqs = probe_irq_on(); /* Wait ... */ udelay(5000L); /* Enable the Tx interrupts on the CD1400 */ local_irq_save(flags); cy_writeb(address + (CyCAR << index), 0); cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index); cy_writeb(address + (CyCAR << index), 0); cy_writeb(address + (CySRER << index), readb(address + (CySRER << index)) | CyTxRdy); local_irq_restore(flags); /* Wait ... */ udelay(5000L); /* Check which interrupt is in use */ irq = probe_irq_off(irqs); /* Clean up */ save_xir = (u_char) readb(address + (CyTIR << index)); save_car = readb(address + (CyCAR << index)); cy_writeb(address + (CyCAR << index), (save_xir & 0x3)); cy_writeb(address + (CySRER << index), readb(address + (CySRER << index)) & ~CyTxRdy); cy_writeb(address + (CyTIR << index), (save_xir & 0x3f)); cy_writeb(address + (CyCAR << index), (save_car)); cy_writeb(address + (Cy_ClrIntr << index), 0); /* Cy_ClrIntr is 0x1800 */ return (irq > 0) ? irq : 0; } #endif /* CONFIG_ISA */ static void cyy_intr_chip(struct cyclades_card *cinfo, int chip, void __iomem * base_addr, int status, int index) { struct cyclades_port *info; struct tty_struct *tty; int char_count; int j, len, mdm_change, mdm_status, outch; int save_xir, channel, save_car; char data; if (status & CySRReceive) { /* reception interrupt */ #ifdef CY_DEBUG_INTERRUPTS printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip); #endif /* determine the channel & change to that context */ spin_lock(&cinfo->card_lock); save_xir = (u_char) readb(base_addr + (CyRIR << index)); channel = (u_short) (save_xir & CyIRChannel); info = &cinfo->ports[channel + chip * 4]; save_car = readb(base_addr + (CyCAR << index)); cy_writeb(base_addr + (CyCAR << index), save_xir); /* if there is nowhere to put the data, discard it */ if (info->tty == NULL) { j = (readb(base_addr + (CyRIVR << index)) & CyIVRMask); if (j == CyIVRRxEx) { /* exception */ data = readb(base_addr + (CyRDSR << index)); } else { /* normal character reception */ char_count = readb(base_addr + (CyRDCR << index)); while (char_count--) { data = readb(base_addr + (CyRDSR << index)); } } } else { /* there is an open port for this data */ tty = info->tty; j = (readb(base_addr + (CyRIVR << index)) & CyIVRMask); if (j == CyIVRRxEx) { /* exception */ data = readb(base_addr + (CyRDSR << index)); /* For statistics only */ if (data & CyBREAK) info->icount.brk++; else if (data & CyFRAME) info->icount.frame++; else if (data & CyPARITY) info->icount.parity++; else if (data & CyOVERRUN) info->icount.overrun++; if (data & info->ignore_status_mask) { info->icount.rx++; spin_unlock(&cinfo->card_lock); return; } if (tty_buffer_request_room(tty, 1)) { if (data & info->read_status_mask) { if (data & CyBREAK) { tty_insert_flip_char( tty, readb( base_addr + (CyRDSR << index)), TTY_BREAK); info->icount.rx++; if (info->flags & ASYNC_SAK) { do_SAK(tty); } } else if (data & CyFRAME) { tty_insert_flip_char( tty, readb( base_addr + (CyRDSR << index)), TTY_FRAME); info->icount.rx++; info->idle_stats. frame_errs++; } else if (data & CyPARITY) { /* Pieces of seven... */ tty_insert_flip_char( tty, readb( base_addr + (CyRDSR << index)), TTY_PARITY); info->icount.rx++; info->idle_stats. parity_errs++; } else if (data & CyOVERRUN) { tty_insert_flip_char( tty, 0, TTY_OVERRUN); info->icount.rx++; /* If the flip buffer itself is overflowing, we still lose the next incoming character. */ tty_insert_flip_char( tty, readb( base_addr + (CyRDSR << index)), TTY_FRAME); info->icount.rx++; info->idle_stats. overruns++; /* These two conditions may imply */ /* a normal read should be done. */ /* }else if(data & CyTIMEOUT){ */ /* }else if(data & CySPECHAR){ */ } else { tty_insert_flip_char( tty, 0, TTY_NORMAL); info->icount.rx++; } } else { tty_insert_flip_char(tty, 0, TTY_NORMAL); info->icount.rx++; } } else { /* there was a software buffer overrun and nothing could be done about it!!! */ info->icount.buf_overrun++; info->idle_stats.overruns++; } } else { /* normal character reception */ /* load # chars available from the chip */ char_count = readb(base_addr + (CyRDCR << index)); #ifdef CY_ENABLE_MONITORING ++info->mon.int_count; info->mon.char_count += char_count; if (char_count > info->mon.char_max) info->mon.char_max = char_count; info->mon.char_last = char_count; #endif len = tty_buffer_request_room(tty, char_count); while (len--) { data = readb(base_addr + (CyRDSR << index)); tty_insert_flip_char(tty, data, TTY_NORMAL); info->idle_stats.recv_bytes++; info->icount.rx++; #ifdef CY_16Y_HACK udelay(10L); #endif } info->idle_stats.recv_idle = jiffies; } tty_schedule_flip(tty); } /* end of service */ cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f)); cy_writeb(base_addr + (CyCAR << index), (save_car)); spin_unlock(&cinfo->card_lock); } if (status & CySRTransmit) { /* transmission interrupt */ /* Since we only get here when the transmit buffer is empty, we know we can always stuff a dozen characters. */ #ifdef CY_DEBUG_INTERRUPTS printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip); #endif /* determine the channel & change to that context */ spin_lock(&cinfo->card_lock); save_xir = (u_char) readb(base_addr + (CyTIR << index)); channel = (u_short) (save_xir & CyIRChannel); save_car = readb(base_addr + (CyCAR << index)); cy_writeb(base_addr + (CyCAR << index), save_xir); /* validate the port# (as configured and open) */ if (channel + chip * 4 >= cinfo->nports) { cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyTxRdy); goto txend; } info = &cinfo->ports[channel + chip * 4]; if (info->tty == NULL) { cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyTxRdy); goto txdone; } /* load the on-chip space for outbound data */ char_count = info->xmit_fifo_size; if (info->x_char) { /* send special char */ outch = info->x_char; cy_writeb(base_addr + (CyTDR << index), outch); char_count--; info->icount.tx++; info->x_char = 0; } if (info->breakon || info->breakoff) { if (info->breakon) { cy_writeb(base_addr + (CyTDR << index), 0); cy_writeb(base_addr + (CyTDR << index), 0x81); info->breakon = 0; char_count -= 2; } if (info->breakoff) { cy_writeb(base_addr + (CyTDR << index), 0); cy_writeb(base_addr + (CyTDR << index), 0x83); info->breakoff = 0; char_count -= 2; } } while (char_count-- > 0) { if (!info->xmit_cnt) { if (readb(base_addr + (CySRER << index)) & CyTxMpty) { cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyTxMpty); } else { cy_writeb(base_addr + (CySRER << index), (readb(base_addr + (CySRER << index)) & ~CyTxRdy) | CyTxMpty); } goto txdone; } if (info->xmit_buf == NULL) { cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyTxRdy); goto txdone; } if (info->tty->stopped || info->tty->hw_stopped) { cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyTxRdy); goto txdone; } /* Because the Embedded Transmit Commands have been enabled, we must check to see if the escape character, NULL, is being sent. If it is, we must ensure that there is room for it to be doubled in the output stream. Therefore we no longer advance the pointer when the character is fetched, but rather wait until after the check for a NULL output character. This is necessary because there may not be room for the two chars needed to send a NULL.) */ outch = info->xmit_buf[info->xmit_tail]; if (outch) { info->xmit_cnt--; info->xmit_tail = (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); cy_writeb(base_addr + (CyTDR << index), outch); info->icount.tx++; } else { if (char_count > 1) { info->xmit_cnt--; info->xmit_tail = (info->xmit_tail + 1)& (SERIAL_XMIT_SIZE - 1); cy_writeb(base_addr + (CyTDR << index), outch); cy_writeb(base_addr + (CyTDR << index), 0); info->icount.tx++; char_count--; } } } txdone: if (info->xmit_cnt < WAKEUP_CHARS) { cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); } txend: /* end of service */ cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f)); cy_writeb(base_addr + (CyCAR << index), (save_car)); spin_unlock(&cinfo->card_lock); } if (status & CySRModem) { /* modem interrupt */ /* determine the channel & change to that context */ spin_lock(&cinfo->card_lock); save_xir = (u_char) readb(base_addr + (CyMIR << index)); channel = (u_short) (save_xir & CyIRChannel); info = &cinfo->ports[channel + chip * 4]; save_car = readb(base_addr + (CyCAR << index)); cy_writeb(base_addr + (CyCAR << index), save_xir); mdm_change = readb(base_addr + (CyMISR << index)); mdm_status = readb(base_addr + (CyMSVR1 << index)); if (info->tty) { if (mdm_change & CyANY_DELTA) { /* For statistics only */ if (mdm_change & CyDCD) info->icount.dcd++; if (mdm_change & CyCTS) info->icount.cts++; if (mdm_change & CyDSR) info->icount.dsr++; if (mdm_change & CyRI) info->icount.rng++; cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP); } if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) { if (mdm_status & CyDCD) { cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP); } else { cy_sched_event(info, Cy_EVENT_HANGUP); } } if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) { if (info->tty->hw_stopped) { if (mdm_status & CyCTS) { /* cy_start isn't used because... !!! */ info->tty->hw_stopped = 0; cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index))| CyTxRdy); cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); } } else { if (!(mdm_status & CyCTS)) { /* cy_stop isn't used because ... !!! */ info->tty->hw_stopped = 1; cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyTxRdy); } } } /* if (mdm_change & CyDSR) { } if (mdm_change & CyRI) { }*/ } /* end of service */ cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f)); cy_writeb(base_addr + (CyCAR << index), save_car); spin_unlock(&cinfo->card_lock); } } /* The real interrupt service routine is called whenever the card wants its hand held--chars received, out buffer empty, modem change, etc. */ static irqreturn_t cyy_interrupt(int irq, void *dev_id) { int status; struct cyclades_card *cinfo = dev_id; void __iomem *base_addr, *card_base_addr; int chip; int index; int too_many; int had_work; if (unlikely(cinfo == NULL)) { #ifdef CY_DEBUG_INTERRUPTS printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq); #endif return IRQ_NONE; /* spurious interrupt */ } card_base_addr = cinfo->base_addr; index = cinfo->bus_index; /* card was not initialized yet (e.g. DEBUG_SHIRQ) */ if (unlikely(card_base_addr == NULL)) return IRQ_HANDLED; /* This loop checks all chips in the card. Make a note whenever _any_ chip had some work to do, as this is considered an indication that there will be more to do. Only when no chip has any work does this outermost loop exit. */ do { had_work = 0; for (chip = 0; chip < cinfo->num_chips; chip++) { base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); too_many = 0; while ((status = readb(base_addr + (CySVRR << index))) != 0x00) { had_work++; /* The purpose of the following test is to ensure that no chip can monopolize the driver. This forces the chips to be checked in a round-robin fashion (after draining each of a bunch (1000) of characters). */ if (1000 < too_many++) { break; } cyy_intr_chip(cinfo, chip, base_addr, status, index); } } } while (had_work); /* clear interrupts */ spin_lock(&cinfo->card_lock); cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0); /* Cy_ClrIntr is 0x1800 */ spin_unlock(&cinfo->card_lock); return IRQ_HANDLED; } /* cyy_interrupt */ /***********************************************************/ /********* End of block of Cyclom-Y specific code **********/ /******** Start of block of Cyclades-Z specific code *********/ /***********************************************************/ static int cyz_fetch_msg(struct cyclades_card *cinfo, __u32 * channel, __u8 * cmd, __u32 * param) { struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; unsigned long loc_doorbell; firm_id = cinfo->base_addr + ID_ADDRESS; if (!ISZLOADED(*cinfo)) { return -1; } zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *) (cinfo->ctl_addr))->loc_doorbell); if (loc_doorbell) { *cmd = (char)(0xff & loc_doorbell); *channel = readl(&board_ctrl->fwcmd_channel); *param = (__u32) readl(&board_ctrl->fwcmd_param); cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> loc_doorbell, 0xffffffff); return 1; } return 0; } /* cyz_fetch_msg */ static int cyz_issue_cmd(struct cyclades_card *cinfo, __u32 channel, __u8 cmd, __u32 param) { struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; __u32 __iomem *pci_doorbell; int index; firm_id = cinfo->base_addr + ID_ADDRESS; if (!ISZLOADED(*cinfo)) { return -1; } zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; index = 0; pci_doorbell = &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell; while ((readl(pci_doorbell) & 0xff) != 0) { if (index++ == 1000) { return (int)(readl(pci_doorbell) & 0xff); } udelay(50L); } cy_writel(&board_ctrl->hcmd_channel, channel); cy_writel(&board_ctrl->hcmd_param, param); cy_writel(pci_doorbell, (long)cmd); return 0; } /* cyz_issue_cmd */ static void cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl, struct BUF_CTRL __iomem *buf_ctrl) { struct cyclades_card *cinfo = info->card; struct tty_struct *tty = info->tty; int char_count; int len; #ifdef BLOCKMOVE unsigned char *buf; #else char data; #endif __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr; rx_get = new_rx_get = readl(&buf_ctrl->rx_get); rx_put = readl(&buf_ctrl->rx_put); rx_bufsize = readl(&buf_ctrl->rx_bufsize); rx_bufaddr = readl(&buf_ctrl->rx_bufaddr); if (rx_put >= rx_get) char_count = rx_put - rx_get; else char_count = rx_put - rx_get + rx_bufsize; if (char_count) { #ifdef CY_ENABLE_MONITORING info->mon.int_count++; info->mon.char_count += char_count; if (char_count > info->mon.char_max) info->mon.char_max = char_count; info->mon.char_last = char_count; #endif if (tty == NULL) { /* flush received characters */ new_rx_get = (new_rx_get + char_count) & (rx_bufsize - 1); info->rflush_count++; } else { #ifdef BLOCKMOVE /* we'd like to use memcpy(t, f, n) and memset(s, c, count) for performance, but because of buffer boundaries, there may be several steps to the operation */ while (1) { len = tty_prepare_flip_string(tty, &buf, char_count); if (!len) break; len = min_t(unsigned int, min(len, char_count), rx_bufsize - new_rx_get); memcpy_fromio(buf, cinfo->base_addr + rx_bufaddr + new_rx_get, len); new_rx_get = (new_rx_get + len) & (rx_bufsize - 1); char_count -= len; info->icount.rx += len; info->idle_stats.recv_bytes += len; } #else len = tty_buffer_request_room(tty, char_count); while (len--) { data = readb(cinfo->base_addr + rx_bufaddr + new_rx_get); new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1); tty_insert_flip_char(tty, data, TTY_NORMAL); info->idle_stats.recv_bytes++; info->icount.rx++; } #endif #ifdef CONFIG_CYZ_INTR /* Recalculate the number of chars in the RX buffer and issue a cmd in case it's higher than the RX high water mark */ rx_put = readl(&buf_ctrl->rx_put); if (rx_put >= rx_get) char_count = rx_put - rx_get; else char_count = rx_put - rx_get + rx_bufsize; if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) { cy_sched_event(info, Cy_EVENT_Z_RX_FULL); } #endif info->idle_stats.recv_idle = jiffies; tty_schedule_flip(tty); } /* Update rx_get */ cy_writel(&buf_ctrl->rx_get, new_rx_get); } } static void cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl, struct BUF_CTRL __iomem *buf_ctrl) { struct cyclades_card *cinfo = info->card; struct tty_struct *tty = info->tty; char data; int char_count; #ifdef BLOCKMOVE int small_count; #endif __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr; if (info->xmit_cnt <= 0) /* Nothing to transmit */ return; tx_get = readl(&buf_ctrl->tx_get); tx_put = readl(&buf_ctrl->tx_put); tx_bufsize = readl(&buf_ctrl->tx_bufsize); tx_bufaddr = readl(&buf_ctrl->tx_bufaddr); if (tx_put >= tx_get) char_count = tx_get - tx_put - 1 + tx_bufsize; else char_count = tx_get - tx_put - 1; if (char_count) { if (tty == NULL) goto ztxdone; if (info->x_char) { /* send special char */ data = info->x_char; cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); tx_put = (tx_put + 1) & (tx_bufsize - 1); info->x_char = 0; char_count--; info->icount.tx++; } #ifdef BLOCKMOVE while (0 < (small_count = min_t(unsigned int, tx_bufsize - tx_put, min_t(unsigned int, (SERIAL_XMIT_SIZE - info->xmit_tail), min_t(unsigned int, info->xmit_cnt, char_count))))) { memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put), &info->xmit_buf[info->xmit_tail], small_count); tx_put = (tx_put + small_count) & (tx_bufsize - 1); char_count -= small_count; info->icount.tx += small_count; info->xmit_cnt -= small_count; info->xmit_tail = (info->xmit_tail + small_count) & (SERIAL_XMIT_SIZE - 1); } #else while (info->xmit_cnt && char_count) { data = info->xmit_buf[info->xmit_tail]; info->xmit_cnt--; info->xmit_tail = (info->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1); cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); tx_put = (tx_put + 1) & (tx_bufsize - 1); char_count--; info->icount.tx++; } #endif ztxdone: if (info->xmit_cnt < WAKEUP_CHARS) { cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); } /* Update tx_put */ cy_writel(&buf_ctrl->tx_put, tx_put); } } static void cyz_handle_cmd(struct cyclades_card *cinfo) { struct tty_struct *tty; struct cyclades_port *info; static struct FIRM_ID __iomem *firm_id; static struct ZFW_CTRL __iomem *zfw_ctrl; static struct BOARD_CTRL __iomem *board_ctrl; static struct CH_CTRL __iomem *ch_ctrl; static struct BUF_CTRL __iomem *buf_ctrl; __u32 channel; __u8 cmd; __u32 param; __u32 hw_ver, fw_ver; int special_count; int delta_count; firm_id = cinfo->base_addr + ID_ADDRESS; zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; fw_ver = readl(&board_ctrl->fw_version); hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> mail_box_0); while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) { special_count = 0; delta_count = 0; info = &cinfo->ports[channel]; if ((tty = info->tty) == NULL) continue; ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); switch (cmd) { case C_CM_PR_ERROR: tty_insert_flip_char(tty, 0, TTY_PARITY); info->icount.rx++; special_count++; break; case C_CM_FR_ERROR: tty_insert_flip_char(tty, 0, TTY_FRAME); info->icount.rx++; special_count++; break; case C_CM_RXBRK: tty_insert_flip_char(tty, 0, TTY_BREAK); info->icount.rx++; special_count++; break; case C_CM_MDCD: info->icount.dcd++; delta_count++; if (info->flags & ASYNC_CHECK_CD) { if ((fw_ver > 241 ? ((u_long) param) : readl(&ch_ctrl->rs_status)) & C_RS_DCD) { cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP); } else { cy_sched_event(info, Cy_EVENT_HANGUP); } } break; case C_CM_MCTS: info->icount.cts++; delta_count++; break; case C_CM_MRI: info->icount.rng++; delta_count++; break; case C_CM_MDSR: info->icount.dsr++; delta_count++; break; #ifdef Z_WAKE case C_CM_IOCTLW: cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP); break; #endif #ifdef CONFIG_CYZ_INTR case C_CM_RXHIWM: case C_CM_RXNNDT: case C_CM_INTBACK2: /* Reception Interrupt */ #ifdef CY_DEBUG_INTERRUPTS printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, " "port %ld\n", info->card, channel); #endif cyz_handle_rx(info, ch_ctrl, buf_ctrl); break; case C_CM_TXBEMPTY: case C_CM_TXLOWWM: case C_CM_INTBACK: /* Transmission Interrupt */ #ifdef CY_DEBUG_INTERRUPTS printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, " "port %ld\n", info->card, channel); #endif cyz_handle_tx(info, ch_ctrl, buf_ctrl); break; #endif /* CONFIG_CYZ_INTR */ case C_CM_FATAL: /* should do something with this !!! */ break; default: break; } if (delta_count) cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP); if (special_count) tty_schedule_flip(tty); } } #ifdef CONFIG_CYZ_INTR static irqreturn_t cyz_interrupt(int irq, void *dev_id) { struct cyclades_card *cinfo = dev_id; if (unlikely(cinfo == NULL)) { #ifdef CY_DEBUG_INTERRUPTS printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq); #endif return IRQ_NONE; /* spurious interrupt */ } if (unlikely(!ISZLOADED(*cinfo))) { #ifdef CY_DEBUG_INTERRUPTS printk(KERN_DEBUG "cyz_interrupt: board not yet loaded " "(IRQ%d).\n", irq); #endif return IRQ_NONE; } /* Handle the interrupts */ cyz_handle_cmd(cinfo); return IRQ_HANDLED; } /* cyz_interrupt */ static void cyz_rx_restart(unsigned long arg) { struct cyclades_port *info = (struct cyclades_port *)arg; struct cyclades_card *card = info->card; int retval; __u32 channel = info->line - card->first_line; unsigned long flags; spin_lock_irqsave(&card->card_lock, flags); retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L); if (retval != 0) { printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n", info->line, retval); } spin_unlock_irqrestore(&card->card_lock, flags); } #else /* CONFIG_CYZ_INTR */ static void cyz_poll(unsigned long arg) { struct cyclades_card *cinfo; struct cyclades_port *info; struct tty_struct *tty; static struct FIRM_ID *firm_id; static struct ZFW_CTRL *zfw_ctrl; static struct BOARD_CTRL *board_ctrl; static struct CH_CTRL *ch_ctrl; static struct BUF_CTRL *buf_ctrl; unsigned long expires = jiffies + HZ; int card, port; for (card = 0; card < NR_CARDS; card++) { cinfo = &cy_card[card]; if (!IS_CYC_Z(*cinfo)) continue; if (!ISZLOADED(*cinfo)) continue; firm_id = cinfo->base_addr + ID_ADDRESS; zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &(zfw_ctrl->board_ctrl); /* Skip first polling cycle to avoid racing conditions with the FW */ if (!cinfo->intr_enabled) { cinfo->nports = (int)readl(&board_ctrl->n_channel); cinfo->intr_enabled = 1; continue; } cyz_handle_cmd(cinfo); for (port = 0; port < cinfo->nports; port++) { info = &cinfo->ports[port]; tty = info->tty; ch_ctrl = &(zfw_ctrl->ch_ctrl[port]); buf_ctrl = &(zfw_ctrl->buf_ctrl[port]); if (!info->throttle) cyz_handle_rx(info, ch_ctrl, buf_ctrl); cyz_handle_tx(info, ch_ctrl, buf_ctrl); } /* poll every 'cyz_polling_cycle' period */ expires = jiffies + cyz_polling_cycle; } mod_timer(&cyz_timerlist, expires); } /* cyz_poll */ #endif /* CONFIG_CYZ_INTR */ /********** End of block of Cyclades-Z specific code *********/ /***********************************************************/ /* This is called whenever a port becomes active; interrupts are enabled and DTR & RTS are turned on. */ static int startup(struct cyclades_port *info) { struct cyclades_card *card; unsigned long flags; int retval = 0; void __iomem *base_addr; int chip, channel, index; unsigned long page; card = info->card; channel = info->line - card->first_line; page = get_zeroed_page(GFP_KERNEL); if (!page) return -ENOMEM; spin_lock_irqsave(&card->card_lock, flags); if (info->flags & ASYNC_INITIALIZED) { free_page(page); goto errout; } if (!info->type) { if (info->tty) { set_bit(TTY_IO_ERROR, &info->tty->flags); } free_page(page); goto errout; } if (info->xmit_buf) free_page(page); else info->xmit_buf = (unsigned char *)page; spin_unlock_irqrestore(&card->card_lock, flags); set_line_char(info); if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, " "base_addr %p\n", card, chip, channel, base_addr); #endif spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); cy_writeb(base_addr + (CyRTPR << index), (info->default_timeout ? info->default_timeout : 0x02)); /* 10ms rx timeout */ cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR, index); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:startup raising DTR\n"); printk(KERN_DEBUG " status: 0x%x, 0x%x\n", readb(base_addr + (CyMSVR1 << index)), readb(base_addr + (CyMSVR2 << index))); #endif cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) | CyRxData); info->flags |= ASYNC_INITIALIZED; if (info->tty) { clear_bit(TTY_IO_ERROR, &info->tty->flags); } info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; info->breakon = info->breakoff = 0; memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); info->idle_stats.in_use = info->idle_stats.recv_idle = info->idle_stats.xmit_idle = jiffies; spin_unlock_irqrestore(&card->card_lock, flags); } else { struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; struct CH_CTRL __iomem *ch_ctrl; int retval; base_addr = card->base_addr; firm_id = base_addr + ID_ADDRESS; if (!ISZLOADED(*card)) { return -ENODEV; } zfw_ctrl = card->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; ch_ctrl = zfw_ctrl->ch_ctrl; #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc startup Z card %d, channel %d, " "base_addr %p\n", card, channel, base_addr); #endif spin_lock_irqsave(&card->card_lock, flags); cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE); #ifdef Z_WAKE #ifdef CONFIG_CYZ_INTR cy_writel(&ch_ctrl[channel].intr_enable, C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD); #else cy_writel(&ch_ctrl[channel].intr_enable, C_IN_IOCTLW | C_IN_MDCD); #endif /* CONFIG_CYZ_INTR */ #else #ifdef CONFIG_CYZ_INTR cy_writel(&ch_ctrl[channel].intr_enable, C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | C_IN_RXNNDT | C_IN_MDCD); #else cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD); #endif /* CONFIG_CYZ_INTR */ #endif /* Z_WAKE */ retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); if (retval != 0) { printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was " "%x\n", info->line, retval); } /* Flush RX buffers before raising DTR and RTS */ retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L); if (retval != 0) { printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was " "%x\n", info->line, retval); } /* set timeout !!! */ /* set RTS and DTR !!! */ cy_writel(&ch_ctrl[channel].rs_control, readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR); retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); if (retval != 0) { printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was " "%x\n", info->line, retval); } #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:startup raising Z DTR\n"); #endif /* enable send, recv, modem !!! */ info->flags |= ASYNC_INITIALIZED; if (info->tty) { clear_bit(TTY_IO_ERROR, &info->tty->flags); } info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; info->breakon = info->breakoff = 0; memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); info->idle_stats.in_use = info->idle_stats.recv_idle = info->idle_stats.xmit_idle = jiffies; spin_unlock_irqrestore(&card->card_lock, flags); } #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc startup done\n"); #endif return 0; errout: spin_unlock_irqrestore(&card->card_lock, flags); return retval; } /* startup */ static void start_xmit(struct cyclades_port *info) { struct cyclades_card *card; unsigned long flags; void __iomem *base_addr; int chip, channel, index; card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), channel); cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) | CyTxRdy); spin_unlock_irqrestore(&card->card_lock, flags); } else { #ifdef CONFIG_CYZ_INTR int retval; spin_lock_irqsave(&card->card_lock, flags); retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L); if (retval != 0) { printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was " "%x\n", info->line, retval); } spin_unlock_irqrestore(&card->card_lock, flags); #else /* CONFIG_CYZ_INTR */ /* Don't have to do anything at this time */ #endif /* CONFIG_CYZ_INTR */ } } /* start_xmit */ /* * This routine shuts down a serial port; interrupts are disabled, * and DTR is dropped if the hangup on close termio flag is on. */ static void shutdown(struct cyclades_port *info) { struct cyclades_card *card; unsigned long flags; void __iomem *base_addr; int chip, channel, index; if (!(info->flags & ASYNC_INITIALIZED)) { return; } card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, " "channel %d, base_addr %p\n", card, chip, channel, base_addr); #endif spin_lock_irqsave(&card->card_lock, flags); /* Clear delta_msr_wait queue to avoid mem leaks. */ wake_up_interruptible(&info->delta_msr_wait); if (info->xmit_buf) { unsigned char *temp; temp = info->xmit_buf; info->xmit_buf = NULL; free_page((unsigned long)temp); } cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc shutdown dropping DTR\n"); printk(KERN_DEBUG " status: 0x%x, 0x%x\n", readb(base_addr + (CyMSVR1 << index)), readb(base_addr + (CyMSVR2 << index))); #endif } cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index); /* it may be appropriate to clear _XMIT at some later date (after testing)!!! */ if (info->tty) { set_bit(TTY_IO_ERROR, &info->tty->flags); } info->flags &= ~ASYNC_INITIALIZED; spin_unlock_irqrestore(&card->card_lock, flags); } else { struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; struct CH_CTRL __iomem *ch_ctrl; int retval; base_addr = card->base_addr; #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, " "base_addr %p\n", card, channel, base_addr); #endif firm_id = base_addr + ID_ADDRESS; if (!ISZLOADED(*card)) { return; } zfw_ctrl = card->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; ch_ctrl = zfw_ctrl->ch_ctrl; spin_lock_irqsave(&card->card_lock, flags); if (info->xmit_buf) { unsigned char *temp; temp = info->xmit_buf; info->xmit_buf = NULL; free_page((unsigned long)temp); } if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { cy_writel(&ch_ctrl[channel].rs_control, (__u32)(readl(&ch_ctrl[channel].rs_control) & ~(C_RS_RTS | C_RS_DTR))); retval = cyz_issue_cmd(info->card, channel, C_CM_IOCTLM, 0L); if (retval != 0) { printk(KERN_ERR"cyc:shutdown retval on ttyC%d " "was %x\n", info->line, retval); } #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n"); #endif } if (info->tty) { set_bit(TTY_IO_ERROR, &info->tty->flags); } info->flags &= ~ASYNC_INITIALIZED; spin_unlock_irqrestore(&card->card_lock, flags); } #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc shutdown done\n"); #endif } /* shutdown */ /* * ------------------------------------------------------------ * cy_open() and friends * ------------------------------------------------------------ */ static int block_til_ready(struct tty_struct *tty, struct file *filp, struct cyclades_port *info) { DECLARE_WAITQUEUE(wait, current); struct cyclades_card *cinfo; unsigned long flags; int chip, channel, index; int retval; void __iomem *base_addr; cinfo = info->card; channel = info->line - cinfo->first_line; /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { wait_event_interruptible(info->close_wait, !(info->flags & ASYNC_CLOSING)); return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; } /* * If non-blocking mode is set, then make the check up front * and then exit. */ if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) { info->flags |= ASYNC_NORMAL_ACTIVE; return 0; } /* * Block waiting for the carrier detect and the line to become * free (i.e., not in use by the callout). While we are in * this loop, info->count is dropped by one, so that * cy_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; add_wait_queue(&info->open_wait, &wait); #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, " "count = %d\n", info->line, info->count); #endif spin_lock_irqsave(&cinfo->card_lock, flags); if (!tty_hung_up_p(filp)) info->count--; spin_unlock_irqrestore(&cinfo->card_lock, flags); #ifdef CY_DEBUG_COUNT printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to " "%d\n", current->pid, info->count); #endif info->blocked_open++; if (!IS_CYC_Z(*cinfo)) { chip = channel >> 2; channel &= 0x03; index = cinfo->bus_index; base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); while (1) { spin_lock_irqsave(&cinfo->card_lock, flags); if ((tty->termios->c_cflag & CBAUD)) { cy_writeb(base_addr + (CyCAR << index), (u_char) channel); cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:block_til_ready raising " "DTR\n"); printk(KERN_DEBUG " status: 0x%x, 0x%x\n", readb(base_addr + (CyMSVR1 << index)), readb(base_addr + (CyMSVR2 << index))); #endif } spin_unlock_irqrestore(&cinfo->card_lock, flags); set_current_state(TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) { retval = ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS); break; } spin_lock_irqsave(&cinfo->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || (readb(base_addr + (CyMSVR1 << index)) & CyDCD))) { spin_unlock_irqrestore(&cinfo->card_lock, flags); break; } spin_unlock_irqrestore(&cinfo->card_lock, flags); if (signal_pending(current)) { retval = -ERESTARTSYS; break; } #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc block_til_ready blocking: " "ttyC%d, count = %d\n", info->line, info->count); #endif schedule(); } } else { struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; struct CH_CTRL __iomem *ch_ctrl; int retval; base_addr = cinfo->base_addr; firm_id = base_addr + ID_ADDRESS; if (!ISZLOADED(*cinfo)) { __set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); return -EINVAL; } zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; ch_ctrl = zfw_ctrl->ch_ctrl; while (1) { if ((tty->termios->c_cflag & CBAUD)) { cy_writel(&ch_ctrl[channel].rs_control, readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR); retval = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L); if (retval != 0) { printk(KERN_ERR "cyc:block_til_ready " "retval on ttyC%d was %x\n", info->line, retval); } #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:block_til_ready raising " "Z DTR\n"); #endif } set_current_state(TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) { retval = ((info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS); break; } if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || (readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) { break; } if (signal_pending(current)) { retval = -ERESTARTSYS; break; } #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc block_til_ready blocking: " "ttyC%d, count = %d\n", info->line, info->count); #endif schedule(); } } __set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); if (!tty_hung_up_p(filp)) { info->count++; #ifdef CY_DEBUG_COUNT printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing " "count to %d\n", current->pid, info->count); #endif } info->blocked_open--; #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, " "count = %d\n", info->line, info->count); #endif if (retval) return retval; info->flags |= ASYNC_NORMAL_ACTIVE; return 0; } /* block_til_ready */ /* * This routine is called whenever a serial port is opened. It * performs the serial-specific initialization for the tty structure. */ static int cy_open(struct tty_struct *tty, struct file *filp) { struct cyclades_port *info; unsigned int i; int retval, line; line = tty->index; if ((line < 0) || (NR_PORTS <= line)) { return -ENODEV; } for (i = 0; i < NR_CARDS; i++) if (line < cy_card[i].first_line + cy_card[i].nports && line >= cy_card[i].first_line) break; if (i >= NR_CARDS) return -ENODEV; info = &cy_card[i].ports[line - cy_card[i].first_line]; if (info->line < 0) { return -ENODEV; } /* If the card's firmware hasn't been loaded, treat it as absent from the system. This will make the user pay attention. */ if (IS_CYC_Z(*info->card)) { struct cyclades_card *cinfo = info->card; struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS; if (!ISZLOADED(*cinfo)) { if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *) (cinfo->ctl_addr))->mail_box_0)) && Z_FPGA_CHECK(*cinfo)) && (ZFIRM_HLT == readl( &firm_id->signature))) { printk(KERN_ERR "cyc:Cyclades-Z Error: you " "need an external power supply for " "this number of ports.\nFirmware " "halted.\n"); } else { printk(KERN_ERR "cyc:Cyclades-Z firmware not " "yet loaded\n"); } return -ENODEV; } #ifdef CONFIG_CYZ_INTR else { /* In case this Z board is operating in interrupt mode, its interrupts should be enabled as soon as the first open happens to one of its ports. */ if (!cinfo->intr_enabled) { struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; /* Enable interrupts on the PLX chip */ cy_writew(cinfo->ctl_addr + 0x68, readw(cinfo->ctl_addr + 0x68) | 0x0900); /* Enable interrupts on the FW */ retval = cyz_issue_cmd(cinfo, 0, C_CM_IRQ_ENBL, 0L); if (retval != 0) { printk(KERN_ERR "cyc:IRQ enable retval " "was %x\n", retval); } cinfo->nports = (int)readl(&board_ctrl->n_channel); cinfo->intr_enabled = 1; } } #endif /* CONFIG_CYZ_INTR */ /* Make sure this Z port really exists in hardware */ if (info->line > (cinfo->first_line + cinfo->nports - 1)) return -ENODEV; } #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line); #endif tty->driver_data = info; info->tty = tty; if (serial_paranoia_check(info, tty->name, "cy_open")) { return -ENODEV; } #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line, info->count); #endif info->count++; #ifdef CY_DEBUG_COUNT printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n", current->pid, info->count); #endif /* * If the port is the middle of closing, bail out now */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { wait_event_interruptible(info->close_wait, !(info->flags & ASYNC_CLOSING)); return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; } /* * Start up serial port */ retval = startup(info); if (retval) { return retval; } retval = block_til_ready(tty, filp, info); if (retval) { #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready " "with %d\n", retval); #endif return retval; } info->throttle = 0; #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc:cy_open done\n"); #endif return 0; } /* cy_open */ /* * cy_wait_until_sent() --- wait until the transmitter is empty */ static void cy_wait_until_sent(struct tty_struct *tty, int timeout) { struct cyclades_card *card; struct cyclades_port *info = tty->driver_data; void __iomem *base_addr; int chip, channel, index; unsigned long orig_jiffies; int char_time; if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent")) return; if (info->xmit_fifo_size == 0) return; /* Just in case.... */ orig_jiffies = jiffies; /* * Set the check interval to be 1/5 of the estimated time to * send a single character, and make it at least 1. The check * interval should also be less than the timeout. * * Note: we have to use pretty tight timings here to satisfy * the NIST-PCTS. */ char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; char_time = char_time / 5; if (char_time <= 0) char_time = 1; if (timeout < 0) timeout = 0; if (timeout) char_time = min(char_time, timeout); /* * If the transmitter hasn't cleared in twice the approximate * amount of time to send the entire FIFO, it probably won't * ever clear. This assumes the UART isn't doing flow * control, which is currently the case. Hence, if it ever * takes longer than info->timeout, this is probably due to a * UART bug of some kind. So, we clamp the timeout parameter at * 2*info->timeout. */ if (!timeout || timeout > 2 * info->timeout) timeout = 2 * info->timeout; #ifdef CY_DEBUG_WAIT_UNTIL_SENT printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...", timeout, char_time, jiffies); #endif card = info->card; channel = (info->line) - (card->first_line); if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); while (readb(base_addr + (CySRER << index)) & CyTxRdy) { #ifdef CY_DEBUG_WAIT_UNTIL_SENT printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies); #endif if (msleep_interruptible(jiffies_to_msecs(char_time))) break; if (timeout && time_after(jiffies, orig_jiffies + timeout)) break; } } /* Run one more char cycle */ msleep_interruptible(jiffies_to_msecs(char_time * 5)); #ifdef CY_DEBUG_WAIT_UNTIL_SENT printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies); #endif } /* * This routine is called when a particular tty device is closed. */ static void cy_close(struct tty_struct *tty, struct file *filp) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; unsigned long flags; #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line); #endif if (!info || serial_paranoia_check(info, tty->name, "cy_close")) { return; } card = info->card; spin_lock_irqsave(&card->card_lock, flags); /* If the TTY is being hung up, nothing to do */ if (tty_hung_up_p(filp)) { spin_unlock_irqrestore(&card->card_lock, flags); return; } #ifdef CY_DEBUG_OPEN printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line, info->count); #endif if ((tty->count == 1) && (info->count != 1)) { /* * Uh, oh. tty->count is 1, which means that the tty * structure will be freed. Info->count should always * be one in these conditions. If it's greater than * one, we've got real problems, since it means the * serial port won't be shutdown. */ printk(KERN_ERR "cyc:cy_close: bad serial port count; " "tty->count is 1, info->count is %d\n", info->count); info->count = 1; } #ifdef CY_DEBUG_COUNT printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n", current->pid, info->count - 1); #endif if (--info->count < 0) { #ifdef CY_DEBUG_COUNT printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n"); #endif info->count = 0; } if (info->count) { spin_unlock_irqrestore(&card->card_lock, flags); return; } info->flags |= ASYNC_CLOSING; /* * Now we wait for the transmit buffer to clear; and we notify * the line discipline to only process XON/XOFF characters. */ tty->closing = 1; spin_unlock_irqrestore(&card->card_lock, flags); if (info->closing_wait != CY_CLOSING_WAIT_NONE) { tty_wait_until_sent(tty, info->closing_wait); } spin_lock_irqsave(&card->card_lock, flags); if (!IS_CYC_Z(*card)) { int channel = info->line - card->first_line; int index = card->bus_index; void __iomem *base_addr = card->base_addr + (cy_chip_offset[channel >> 2] << index); /* Stop accepting input */ channel &= 0x03; cy_writeb(base_addr + (CyCAR << index), (u_char) channel); cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyRxData); if (info->flags & ASYNC_INITIALIZED) { /* Waiting for on-board buffers to be empty before closing the port */ spin_unlock_irqrestore(&card->card_lock, flags); cy_wait_until_sent(tty, info->timeout); spin_lock_irqsave(&card->card_lock, flags); } } else { #ifdef Z_WAKE /* Waiting for on-board buffers to be empty before closing the port */ void __iomem *base_addr = card->base_addr; struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS; struct ZFW_CTRL __iomem *zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl; int channel = info->line - card->first_line; int retval; if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) { retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L); if (retval != 0) { printk(KERN_DEBUG "cyc:cy_close retval on " "ttyC%d was %x\n", info->line, retval); } spin_unlock_irqrestore(&card->card_lock, flags); wait_for_completion_interruptible(&info->shutdown_wait); spin_lock_irqsave(&card->card_lock, flags); } #endif } spin_unlock_irqrestore(&card->card_lock, flags); shutdown(info); if (tty->driver->flush_buffer) tty->driver->flush_buffer(tty); tty_ldisc_flush(tty); spin_lock_irqsave(&card->card_lock, flags); tty->closing = 0; info->event = 0; info->tty = NULL; if (info->blocked_open) { spin_unlock_irqrestore(&card->card_lock, flags); if (info->close_delay) { msleep_interruptible(jiffies_to_msecs (info->close_delay)); } wake_up_interruptible(&info->open_wait); spin_lock_irqsave(&card->card_lock, flags); } info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); wake_up_interruptible(&info->close_wait); #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_close done\n"); #endif spin_unlock_irqrestore(&card->card_lock, flags); } /* cy_close */ /* This routine gets called when tty_write has put something into * the write_queue. The characters may come from user space or * kernel space. * * This routine will return the number of characters actually * accepted for writing. * * If the port is not already transmitting stuff, start it off by * enabling interrupts. The interrupt service routine will then * ensure that the characters are sent. * If the port is already active, there is no need to kick it. * */ static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count) { struct cyclades_port *info = tty->driver_data; unsigned long flags; int c, ret = 0; #ifdef CY_DEBUG_IO printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_write")) { return 0; } if (!info->xmit_buf) return 0; spin_lock_irqsave(&info->card->card_lock, flags); while (1) { c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1), (int)(SERIAL_XMIT_SIZE - info->xmit_head))); if (c <= 0) break; memcpy(info->xmit_buf + info->xmit_head, buf, c); info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1); info->xmit_cnt += c; buf += c; count -= c; ret += c; } spin_unlock_irqrestore(&info->card->card_lock, flags); info->idle_stats.xmit_bytes += ret; info->idle_stats.xmit_idle = jiffies; if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) { start_xmit(info); } return ret; } /* cy_write */ /* * This routine is called by the kernel to write a single * character to the tty device. If the kernel uses this routine, * it must call the flush_chars() routine (if defined) when it is * done stuffing characters into the driver. If there is no room * in the queue, the character is ignored. */ static void cy_put_char(struct tty_struct *tty, unsigned char ch) { struct cyclades_port *info = tty->driver_data; unsigned long flags; #ifdef CY_DEBUG_IO printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_put_char")) return; if (!info->xmit_buf) return; spin_lock_irqsave(&info->card->card_lock, flags); if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) { spin_unlock_irqrestore(&info->card->card_lock, flags); return; } info->xmit_buf[info->xmit_head++] = ch; info->xmit_head &= SERIAL_XMIT_SIZE - 1; info->xmit_cnt++; info->idle_stats.xmit_bytes++; info->idle_stats.xmit_idle = jiffies; spin_unlock_irqrestore(&info->card->card_lock, flags); } /* cy_put_char */ /* * This routine is called by the kernel after it has written a * series of characters to the tty device using put_char(). */ static void cy_flush_chars(struct tty_struct *tty) { struct cyclades_port *info = tty->driver_data; #ifdef CY_DEBUG_IO printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) return; if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || !info->xmit_buf) return; start_xmit(info); } /* cy_flush_chars */ /* * This routine returns the numbers of characters the tty driver * will accept for queuing to be written. This number is subject * to change as output buffers get emptied, or if the output flow * control is activated. */ static int cy_write_room(struct tty_struct *tty) { struct cyclades_port *info = tty->driver_data; int ret; #ifdef CY_DEBUG_IO printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_write_room")) return 0; ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; if (ret < 0) ret = 0; return ret; } /* cy_write_room */ static int cy_chars_in_buffer(struct tty_struct *tty) { struct cyclades_card *card; struct cyclades_port *info = tty->driver_data; int channel; if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) return 0; card = info->card; channel = (info->line) - (card->first_line); #ifdef Z_EXT_CHARS_IN_BUFFER if (!IS_CYC_Z(cy_card[card])) { #endif /* Z_EXT_CHARS_IN_BUFFER */ #ifdef CY_DEBUG_IO printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); #endif return info->xmit_cnt; #ifdef Z_EXT_CHARS_IN_BUFFER } else { static struct FIRM_ID *firm_id; static struct ZFW_CTRL *zfw_ctrl; static struct CH_CTRL *ch_ctrl; static struct BUF_CTRL *buf_ctrl; int char_count; __u32 tx_put, tx_get, tx_bufsize; firm_id = card->base_addr + ID_ADDRESS; zfw_ctrl = card->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); tx_get = readl(&buf_ctrl->tx_get); tx_put = readl(&buf_ctrl->tx_put); tx_bufsize = readl(&buf_ctrl->tx_bufsize); if (tx_put >= tx_get) char_count = tx_put - tx_get; else char_count = tx_put - tx_get + tx_bufsize; #ifdef CY_DEBUG_IO printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); #endif return info->xmit_cnt + char_count; } #endif /* Z_EXT_CHARS_IN_BUFFER */ } /* cy_chars_in_buffer */ /* * ------------------------------------------------------------ * cy_ioctl() and friends * ------------------------------------------------------------ */ static void cyy_baud_calc(struct cyclades_port *info, __u32 baud) { int co, co_val, bpr; __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : 25000000); if (baud == 0) { info->tbpr = info->tco = info->rbpr = info->rco = 0; return; } /* determine which prescaler to use */ for (co = 4, co_val = 2048; co; co--, co_val >>= 2) { if (cy_clock / co_val / baud > 63) break; } bpr = (cy_clock / co_val * 2 / baud + 1) / 2; if (bpr > 255) bpr = 255; info->tbpr = info->rbpr = bpr; info->tco = info->rco = co; } /* * This routine finds or computes the various line characteristics. * It used to be called config_setup */ static void set_line_char(struct cyclades_port *info) { struct cyclades_card *card; unsigned long flags; void __iomem *base_addr; int chip, channel, index; unsigned cflag, iflag; unsigned short chip_number; int baud, baud_rate = 0; int i; if (!info->tty || !info->tty->termios) { return; } if (info->line == -1) { return; } cflag = info->tty->termios->c_cflag; iflag = info->tty->termios->c_iflag; /* * Set up the tty->alt_speed kludge */ if (info->tty) { if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) info->tty->alt_speed = 57600; if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) info->tty->alt_speed = 115200; if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) info->tty->alt_speed = 230400; if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) info->tty->alt_speed = 460800; } card = info->card; channel = info->line - card->first_line; chip_number = channel / 4; if (!IS_CYC_Z(*card)) { index = card->bus_index; /* baud rate */ baud = tty_get_baud_rate(info->tty); if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) { if (info->custom_divisor) baud_rate = info->baud / info->custom_divisor; else baud_rate = info->baud; } else if (baud > CD1400_MAX_SPEED) { baud = CD1400_MAX_SPEED; } /* find the baud index */ for (i = 0; i < 20; i++) { if (baud == baud_table[i]) { break; } } if (i == 20) { i = 19; /* CD1400_MAX_SPEED */ } if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) { cyy_baud_calc(info, baud_rate); } else { if (info->chip_rev >= CD1400_REV_J) { /* It is a CD1400 rev. J or later */ info->tbpr = baud_bpr_60[i]; /* Tx BPR */ info->tco = baud_co_60[i]; /* Tx CO */ info->rbpr = baud_bpr_60[i]; /* Rx BPR */ info->rco = baud_co_60[i]; /* Rx CO */ } else { info->tbpr = baud_bpr_25[i]; /* Tx BPR */ info->tco = baud_co_25[i]; /* Tx CO */ info->rbpr = baud_bpr_25[i]; /* Rx BPR */ info->rco = baud_co_25[i]; /* Rx CO */ } } if (baud_table[i] == 134) { /* get it right for 134.5 baud */ info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + 2; } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) { info->timeout = (info->xmit_fifo_size * HZ * 15 / baud_rate) + 2; } else if (baud_table[i]) { info->timeout = (info->xmit_fifo_size * HZ * 15 / baud_table[i]) + 2; /* this needs to be propagated into the card info */ } else { info->timeout = 0; } /* By tradition (is it a standard?) a baud rate of zero implies the line should be/has been closed. A bit later in this routine such a test is performed. */ /* byte size and parity */ info->cor5 = 0; info->cor4 = 0; /* receive threshold */ info->cor3 = (info->default_threshold ? info->default_threshold : baud_cor3[i]); info->cor2 = CyETC; switch (cflag & CSIZE) { case CS5: info->cor1 = Cy_5_BITS; break; case CS6: info->cor1 = Cy_6_BITS; break; case CS7: info->cor1 = Cy_7_BITS; break; case CS8: info->cor1 = Cy_8_BITS; break; } if (cflag & CSTOPB) { info->cor1 |= Cy_2_STOP; } if (cflag & PARENB) { if (cflag & PARODD) { info->cor1 |= CyPARITY_O; } else { info->cor1 |= CyPARITY_E; } } else { info->cor1 |= CyPARITY_NONE; } /* CTS flow control flag */ if (cflag & CRTSCTS) { info->flags |= ASYNC_CTS_FLOW; info->cor2 |= CyCtsAE; } else { info->flags &= ~ASYNC_CTS_FLOW; info->cor2 &= ~CyCtsAE; } if (cflag & CLOCAL) info->flags &= ~ASYNC_CHECK_CD; else info->flags |= ASYNC_CHECK_CD; /*********************************************** The hardware option, CyRtsAO, presents RTS when the chip has characters to send. Since most modems use RTS as reverse (inbound) flow control, this option is not used. If inbound flow control is necessary, DTR can be programmed to provide the appropriate signals for use with a non-standard cable. Contact Marcio Saito for details. ***********************************************/ chip = channel >> 2; channel &= 0x03; base_addr = card->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* tx and rx baud rate */ cy_writeb(base_addr + (CyTCOR << index), info->tco); cy_writeb(base_addr + (CyTBPR << index), info->tbpr); cy_writeb(base_addr + (CyRCOR << index), info->rco); cy_writeb(base_addr + (CyRBPR << index), info->rbpr); /* set line characteristics according configuration */ cy_writeb(base_addr + (CySCHR1 << index), START_CHAR(info->tty)); cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty)); cy_writeb(base_addr + (CyCOR1 << index), info->cor1); cy_writeb(base_addr + (CyCOR2 << index), info->cor2); cy_writeb(base_addr + (CyCOR3 << index), info->cor3); cy_writeb(base_addr + (CyCOR4 << index), info->cor4); cy_writeb(base_addr + (CyCOR5 << index), info->cor5); cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch | CyCOR3ch, index); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */ cy_writeb(base_addr + (CyRTPR << index), (info->default_timeout ? info->default_timeout : 0x02)); /* 10ms rx timeout */ if (C_CLOCAL(info->tty)) { /* without modem intr */ cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) | CyMdmCh); /* act on 1->0 modem transitions */ if ((cflag & CRTSCTS) && info->rflow) { cy_writeb(base_addr + (CyMCOR1 << index), (CyCTS | rflow_thr[i])); } else { cy_writeb(base_addr + (CyMCOR1 << index), CyCTS); } /* act on 0->1 modem transitions */ cy_writeb(base_addr + (CyMCOR2 << index), CyCTS); } else { /* without modem intr */ cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) | CyMdmCh); /* act on 1->0 modem transitions */ if ((cflag & CRTSCTS) && info->rflow) { cy_writeb(base_addr + (CyMCOR1 << index), (CyDSR | CyCTS | CyRI | CyDCD | rflow_thr[i])); } else { cy_writeb(base_addr + (CyMCOR1 << index), CyDSR | CyCTS | CyRI | CyDCD); } /* act on 0->1 modem transitions */ cy_writeb(base_addr + (CyMCOR2 << index), CyDSR | CyCTS | CyRI | CyDCD); } if (i == 0) { /* baud rate is zero, turn off line */ if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); } else { cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); } #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n"); printk(KERN_DEBUG " status: 0x%x, 0x%x\n", readb(base_addr + (CyMSVR1 << index)), readb(base_addr + (CyMSVR2 << index))); #endif } else { if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); } else { cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); } #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_line_char raising DTR\n"); printk(KERN_DEBUG " status: 0x%x, 0x%x\n", readb(base_addr + (CyMSVR1 << index)), readb(base_addr + (CyMSVR2 << index))); #endif } if (info->tty) { clear_bit(TTY_IO_ERROR, &info->tty->flags); } spin_unlock_irqrestore(&card->card_lock, flags); } else { struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; struct CH_CTRL __iomem *ch_ctrl; struct BUF_CTRL __iomem *buf_ctrl; __u32 sw_flow; int retval; firm_id = card->base_addr + ID_ADDRESS; if (!ISZLOADED(*card)) { return; } zfw_ctrl = card->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); buf_ctrl = &zfw_ctrl->buf_ctrl[channel]; /* baud rate */ baud = tty_get_baud_rate(info->tty); if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) { if (info->custom_divisor) baud_rate = info->baud / info->custom_divisor; else baud_rate = info->baud; } else if (baud > CYZ_MAX_SPEED) { baud = CYZ_MAX_SPEED; } cy_writel(&ch_ctrl->comm_baud, baud); if (baud == 134) { /* get it right for 134.5 baud */ info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + 2; } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) { info->timeout = (info->xmit_fifo_size * HZ * 15 / baud_rate) + 2; } else if (baud) { info->timeout = (info->xmit_fifo_size * HZ * 15 / baud) + 2; /* this needs to be propagated into the card info */ } else { info->timeout = 0; } /* byte size and parity */ switch (cflag & CSIZE) { case CS5: cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5); break; case CS6: cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6); break; case CS7: cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7); break; case CS8: cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8); break; } if (cflag & CSTOPB) { cy_writel(&ch_ctrl->comm_data_l, readl(&ch_ctrl->comm_data_l) | C_DL_2STOP); } else { cy_writel(&ch_ctrl->comm_data_l, readl(&ch_ctrl->comm_data_l) | C_DL_1STOP); } if (cflag & PARENB) { if (cflag & PARODD) { cy_writel(&ch_ctrl->comm_parity, C_PR_ODD); } else { cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN); } } else { cy_writel(&ch_ctrl->comm_parity, C_PR_NONE); } /* CTS flow control flag */ if (cflag & CRTSCTS) { cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS); } else { cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) & ~(C_RS_CTS | C_RS_RTS)); } /* As the HW flow control is done in firmware, the driver doesn't need to care about it */ info->flags &= ~ASYNC_CTS_FLOW; /* XON/XOFF/XANY flow control flags */ sw_flow = 0; if (iflag & IXON) { sw_flow |= C_FL_OXX; if (iflag & IXANY) sw_flow |= C_FL_OIXANY; } cy_writel(&ch_ctrl->sw_flow, sw_flow); retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); if (retval != 0) { printk(KERN_ERR "cyc:set_line_char retval on ttyC%d " "was %x\n", info->line, retval); } /* CD sensitivity */ if (cflag & CLOCAL) { info->flags &= ~ASYNC_CHECK_CD; } else { info->flags |= ASYNC_CHECK_CD; } if (baud == 0) { /* baud rate is zero, turn off line */ cy_writel(&ch_ctrl->rs_control, readl(&ch_ctrl->rs_control) & ~C_RS_DTR); #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n"); #endif } else { cy_writel(&ch_ctrl->rs_control, readl(&ch_ctrl->rs_control) | C_RS_DTR); #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n"); #endif } retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L); if (retval != 0) { printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d " "was %x\n", info->line, retval); } if (info->tty) { clear_bit(TTY_IO_ERROR, &info->tty->flags); } } } /* set_line_char */ static int get_serial_info(struct cyclades_port *info, struct serial_struct __user * retinfo) { struct serial_struct tmp; struct cyclades_card *cinfo = info->card; if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); tmp.type = info->type; tmp.line = info->line; tmp.port = (info->card - cy_card) * 0x100 + info->line - cinfo->first_line; tmp.irq = cinfo->irq; tmp.flags = info->flags; tmp.close_delay = info->close_delay; tmp.closing_wait = info->closing_wait; tmp.baud_base = info->baud; tmp.custom_divisor = info->custom_divisor; tmp.hub6 = 0; /*!!! */ return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; } /* get_serial_info */ static int set_serial_info(struct cyclades_port *info, struct serial_struct __user * new_info) { struct serial_struct new_serial; struct cyclades_port old_info; if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) return -EFAULT; old_info = *info; if (!capable(CAP_SYS_ADMIN)) { if (new_serial.close_delay != info->close_delay || new_serial.baud_base != info->baud || (new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)) return -EPERM; info->flags = (info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK); info->baud = new_serial.baud_base; info->custom_divisor = new_serial.custom_divisor; goto check_and_exit; } /* * OK, past this point, all the error checking has been done. * At this point, we start making changes..... */ info->baud = new_serial.baud_base; info->custom_divisor = new_serial.custom_divisor; info->flags = (info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS); info->close_delay = new_serial.close_delay * HZ / 100; info->closing_wait = new_serial.closing_wait * HZ / 100; check_and_exit: if (info->flags & ASYNC_INITIALIZED) { set_line_char(info); return 0; } else { return startup(info); } } /* set_serial_info */ /* * get_lsr_info - get line status register info * * Purpose: Let user call ioctl() to get info when the UART physically * is emptied. On bus types like RS485, the transmitter must * release the bus after transmitting. This must be done when * the transmit shift register is empty, not be done when the * transmit holding register is empty. This functionality * allows an RS485 driver to be written in user space. */ static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value) { struct cyclades_card *card; int chip, channel, index; unsigned char status; unsigned int result; unsigned long flags; void __iomem *base_addr; card = info->card; channel = (info->line) - (card->first_line); if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&card->card_lock, flags); status = readb(base_addr + (CySRER << index)) & (CyTxRdy | CyTxMpty); spin_unlock_irqrestore(&card->card_lock, flags); result = (status ? 0 : TIOCSER_TEMT); } else { /* Not supported yet */ return -EINVAL; } return put_user(result, (unsigned long __user *)value); } static int cy_tiocmget(struct tty_struct *tty, struct file *file) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; int chip, channel, index; void __iomem *base_addr; unsigned long flags; unsigned char status; unsigned long lstatus; unsigned int result; struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; struct CH_CTRL __iomem *ch_ctrl; if (serial_paranoia_check(info, tty->name, __FUNCTION__)) return -ENODEV; card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); status = readb(base_addr + (CyMSVR1 << index)); status |= readb(base_addr + (CyMSVR2 << index)); spin_unlock_irqrestore(&card->card_lock, flags); if (info->rtsdtr_inv) { result = ((status & CyRTS) ? TIOCM_DTR : 0) | ((status & CyDTR) ? TIOCM_RTS : 0); } else { result = ((status & CyRTS) ? TIOCM_RTS : 0) | ((status & CyDTR) ? TIOCM_DTR : 0); } result |= ((status & CyDCD) ? TIOCM_CAR : 0) | ((status & CyRI) ? TIOCM_RNG : 0) | ((status & CyDSR) ? TIOCM_DSR : 0) | ((status & CyCTS) ? TIOCM_CTS : 0); } else { base_addr = card->base_addr; firm_id = card->base_addr + ID_ADDRESS; if (ISZLOADED(*card)) { zfw_ctrl = card->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; ch_ctrl = zfw_ctrl->ch_ctrl; lstatus = readl(&ch_ctrl[channel].rs_status); result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) | ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) | ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) | ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) | ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) | ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0); } else { result = 0; return -ENODEV; } } return result; } /* cy_tiomget */ static int cy_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; int chip, channel, index; void __iomem *base_addr; unsigned long flags; struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; struct BOARD_CTRL __iomem *board_ctrl; struct CH_CTRL __iomem *ch_ctrl; int retval; if (serial_paranoia_check(info, tty->name, __FUNCTION__)) return -ENODEV; card = info->card; channel = (info->line) - (card->first_line); if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); if (set & TIOCM_RTS) { spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); } else { cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); } spin_unlock_irqrestore(&card->card_lock, flags); } if (clear & TIOCM_RTS) { spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); } else { cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); } spin_unlock_irqrestore(&card->card_lock, flags); } if (set & TIOCM_DTR) { spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); } else { cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); } #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n"); printk(KERN_DEBUG " status: 0x%x, 0x%x\n", readb(base_addr + (CyMSVR1 << index)), readb(base_addr + (CyMSVR2 << index))); #endif spin_unlock_irqrestore(&card->card_lock, flags); } if (clear & TIOCM_DTR) { spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); } else { cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); } #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n"); printk(KERN_DEBUG " status: 0x%x, 0x%x\n", readb(base_addr + (CyMSVR1 << index)), readb(base_addr + (CyMSVR2 << index))); #endif spin_unlock_irqrestore(&card->card_lock, flags); } } else { base_addr = card->base_addr; firm_id = card->base_addr + ID_ADDRESS; if (ISZLOADED(*card)) { zfw_ctrl = card->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); board_ctrl = &zfw_ctrl->board_ctrl; ch_ctrl = zfw_ctrl->ch_ctrl; if (set & TIOCM_RTS) { spin_lock_irqsave(&card->card_lock, flags); cy_writel(&ch_ctrl[channel].rs_control, readl(&ch_ctrl[channel].rs_control) | C_RS_RTS); spin_unlock_irqrestore(&card->card_lock, flags); } if (clear & TIOCM_RTS) { spin_lock_irqsave(&card->card_lock, flags); cy_writel(&ch_ctrl[channel].rs_control, readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS); spin_unlock_irqrestore(&card->card_lock, flags); } if (set & TIOCM_DTR) { spin_lock_irqsave(&card->card_lock, flags); cy_writel(&ch_ctrl[channel].rs_control, readl(&ch_ctrl[channel].rs_control) | C_RS_DTR); #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_modem_info raising " "Z DTR\n"); #endif spin_unlock_irqrestore(&card->card_lock, flags); } if (clear & TIOCM_DTR) { spin_lock_irqsave(&card->card_lock, flags); cy_writel(&ch_ctrl[channel].rs_control, readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR); #ifdef CY_DEBUG_DTR printk(KERN_DEBUG "cyc:set_modem_info clearing " "Z DTR\n"); #endif spin_unlock_irqrestore(&card->card_lock, flags); } } else { return -ENODEV; } spin_lock_irqsave(&card->card_lock, flags); retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); if (retval != 0) { printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d " "was %x\n", info->line, retval); } spin_unlock_irqrestore(&card->card_lock, flags); } return 0; } /* cy_tiocmset */ /* * cy_break() --- routine which turns the break handling on or off */ static void cy_break(struct tty_struct *tty, int break_state) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; unsigned long flags; if (serial_paranoia_check(info, tty->name, "cy_break")) return; card = info->card; spin_lock_irqsave(&card->card_lock, flags); if (!IS_CYC_Z(*card)) { /* Let the transmit ISR take care of this (since it requires stuffing characters into the output stream). */ if (break_state == -1) { if (!info->breakon) { info->breakon = 1; if (!info->xmit_cnt) { spin_unlock_irqrestore(&card->card_lock, flags); start_xmit(info); spin_lock_irqsave(&card->card_lock, flags); } } } else { if (!info->breakoff) { info->breakoff = 1; if (!info->xmit_cnt) { spin_unlock_irqrestore(&card->card_lock, flags); start_xmit(info); spin_lock_irqsave(&card->card_lock, flags); } } } } else { int retval; if (break_state == -1) { retval = cyz_issue_cmd(card, info->line - card->first_line, C_CM_SET_BREAK, 0L); if (retval != 0) { printk(KERN_ERR "cyc:cy_break (set) retval on " "ttyC%d was %x\n", info->line, retval); } } else { retval = cyz_issue_cmd(card, info->line - card->first_line, C_CM_CLR_BREAK, 0L); if (retval != 0) { printk(KERN_DEBUG "cyc:cy_break (clr) retval " "on ttyC%d was %x\n", info->line, retval); } } } spin_unlock_irqrestore(&card->card_lock, flags); } /* cy_break */ static int get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon) { if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) return -EFAULT; info->mon.int_count = 0; info->mon.char_count = 0; info->mon.char_max = 0; info->mon.char_last = 0; return 0; } /* get_mon_info */ static int set_threshold(struct cyclades_port *info, unsigned long value) { struct cyclades_card *card; void __iomem *base_addr; int channel, chip, index; unsigned long flags; card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); info->cor3 &= ~CyREC_FIFO; info->cor3 |= value & CyREC_FIFO; spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCOR3 << index), info->cor3); cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index); spin_unlock_irqrestore(&card->card_lock, flags); } return 0; } /* set_threshold */ static int get_threshold(struct cyclades_port *info, unsigned long __user * value) { struct cyclades_card *card; void __iomem *base_addr; int channel, chip, index; unsigned long tmp; card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO; return put_user(tmp, value); } return 0; } /* get_threshold */ static int set_default_threshold(struct cyclades_port *info, unsigned long value) { info->default_threshold = value & 0x0f; return 0; } /* set_default_threshold */ static int get_default_threshold(struct cyclades_port *info, unsigned long __user * value) { return put_user(info->default_threshold, value); } /* get_default_threshold */ static int set_timeout(struct cyclades_port *info, unsigned long value) { struct cyclades_card *card; void __iomem *base_addr; int channel, chip, index; unsigned long flags; card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyRTPR << index), value & 0xff); spin_unlock_irqrestore(&card->card_lock, flags); } return 0; } /* set_timeout */ static int get_timeout(struct cyclades_port *info, unsigned long __user * value) { struct cyclades_card *card; void __iomem *base_addr; int channel, chip, index; unsigned long tmp; card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); tmp = readb(base_addr + (CyRTPR << index)); return put_user(tmp, value); } return 0; } /* get_timeout */ static int set_default_timeout(struct cyclades_port *info, unsigned long value) { info->default_timeout = value & 0xff; return 0; } /* set_default_timeout */ static int get_default_timeout(struct cyclades_port *info, unsigned long __user * value) { return put_user(info->default_timeout, value); } /* get_default_timeout */ /* * This routine allows the tty driver to implement device- * specific ioctl's. If the ioctl number passed in cmd is * not recognized by the driver, it should return ENOIOCTLCMD. */ static int cy_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { struct cyclades_port *info = tty->driver_data; struct cyclades_icount cprev, cnow; /* kernel counter temps */ struct serial_icounter_struct __user *p_cuser; /* user space */ int ret_val = 0; unsigned long flags; void __user *argp = (void __user *)arg; if (serial_paranoia_check(info, tty->name, "cy_ioctl")) return -ENODEV; #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); #endif switch (cmd) { case CYGETMON: ret_val = get_mon_info(info, argp); break; case CYGETTHRESH: ret_val = get_threshold(info, argp); break; case CYSETTHRESH: ret_val = set_threshold(info, arg); break; case CYGETDEFTHRESH: ret_val = get_default_threshold(info, argp); break; case CYSETDEFTHRESH: ret_val = set_default_threshold(info, arg); break; case CYGETTIMEOUT: ret_val = get_timeout(info, argp); break; case CYSETTIMEOUT: ret_val = set_timeout(info, arg); break; case CYGETDEFTIMEOUT: ret_val = get_default_timeout(info, argp); break; case CYSETDEFTIMEOUT: ret_val = set_default_timeout(info, arg); break; case CYSETRFLOW: info->rflow = (int)arg; ret_val = 0; break; case CYGETRFLOW: ret_val = info->rflow; break; case CYSETRTSDTR_INV: info->rtsdtr_inv = (int)arg; ret_val = 0; break; case CYGETRTSDTR_INV: ret_val = info->rtsdtr_inv; break; case CYGETCD1400VER: ret_val = info->chip_rev; break; #ifndef CONFIG_CYZ_INTR case CYZSETPOLLCYCLE: cyz_polling_cycle = (arg * HZ) / 1000; ret_val = 0; break; case CYZGETPOLLCYCLE: ret_val = (cyz_polling_cycle * 1000) / HZ; break; #endif /* CONFIG_CYZ_INTR */ case CYSETWAIT: info->closing_wait = (unsigned short)arg *HZ / 100; ret_val = 0; break; case CYGETWAIT: ret_val = info->closing_wait / (HZ / 100); break; case TIOCGSERIAL: ret_val = get_serial_info(info, argp); break; case TIOCSSERIAL: ret_val = set_serial_info(info, argp); break; case TIOCSERGETLSR: /* Get line status register */ ret_val = get_lsr_info(info, argp); break; /* * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change * - mask passed in arg for lines of interest * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) * Caller should use TIOCGICOUNT to see which one it was */ case TIOCMIWAIT: spin_lock_irqsave(&info->card->card_lock, flags); /* note the counters on entry */ cnow = info->icount; spin_unlock_irqrestore(&info->card->card_lock, flags); ret_val = wait_event_interruptible(info->delta_msr_wait, ({ cprev = cnow; spin_lock_irqsave(&info->card->card_lock, flags); cnow = info->icount; /* atomic copy */ spin_unlock_irqrestore(&info->card->card_lock, flags); ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)); })); break; /* * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) * Return: write counters to the user passed counter struct * NB: both 1->0 and 0->1 transitions are counted except for * RI where only 0->1 is counted. */ case TIOCGICOUNT: spin_lock_irqsave(&info->card->card_lock, flags); cnow = info->icount; spin_unlock_irqrestore(&info->card->card_lock, flags); p_cuser = argp; ret_val = put_user(cnow.cts, &p_cuser->cts); if (ret_val) return ret_val; ret_val = put_user(cnow.dsr, &p_cuser->dsr); if (ret_val) return ret_val; ret_val = put_user(cnow.rng, &p_cuser->rng); if (ret_val) return ret_val; ret_val = put_user(cnow.dcd, &p_cuser->dcd); if (ret_val) return ret_val; ret_val = put_user(cnow.rx, &p_cuser->rx); if (ret_val) return ret_val; ret_val = put_user(cnow.tx, &p_cuser->tx); if (ret_val) return ret_val; ret_val = put_user(cnow.frame, &p_cuser->frame); if (ret_val) return ret_val; ret_val = put_user(cnow.overrun, &p_cuser->overrun); if (ret_val) return ret_val; ret_val = put_user(cnow.parity, &p_cuser->parity); if (ret_val) return ret_val; ret_val = put_user(cnow.brk, &p_cuser->brk); if (ret_val) return ret_val; ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun); if (ret_val) return ret_val; ret_val = 0; break; default: ret_val = -ENOIOCTLCMD; } #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_ioctl done\n"); #endif return ret_val; } /* cy_ioctl */ /* * This routine allows the tty driver to be notified when * device's termios settings have changed. Note that a * well-designed tty driver should be prepared to accept the case * where old == NULL, and try to do something rational. */ static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct cyclades_port *info = tty->driver_data; #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line); #endif if (tty->termios->c_cflag == old_termios->c_cflag && (tty->termios->c_iflag & (IXON | IXANY)) == (old_termios->c_iflag & (IXON | IXANY))) return; set_line_char(info); if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) { tty->hw_stopped = 0; cy_start(tty); } } /* cy_set_termios */ /* This function is used to send a high-priority XON/XOFF character to the device. */ static void cy_send_xchar(struct tty_struct *tty, char ch) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; int channel; if (serial_paranoia_check(info, tty->name, "cy_send_xchar")) return; info->x_char = ch; if (ch) cy_start(tty); card = info->card; channel = info->line - card->first_line; if (IS_CYC_Z(*card)) { if (ch == STOP_CHAR(tty)) cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L); else if (ch == START_CHAR(tty)) cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L); } } /* This routine is called by the upper-layer tty layer to signal that incoming characters should be throttled because the input buffers are close to full. */ static void cy_throttle(struct tty_struct *tty) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; unsigned long flags; void __iomem *base_addr; int chip, channel, index; #ifdef CY_DEBUG_THROTTLE char buf[64]; printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty), info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_throttle")) { return; } card = info->card; if (I_IXOFF(tty)) { if (!IS_CYC_Z(*card)) cy_send_xchar(tty, STOP_CHAR(tty)); else info->throttle = 1; } if (tty->termios->c_cflag & CRTSCTS) { channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); } else { cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); } spin_unlock_irqrestore(&card->card_lock, flags); } else { info->throttle = 1; } } } /* cy_throttle */ /* * This routine notifies the tty driver that it should signal * that characters can now be sent to the tty without fear of * overrunning the input buffers of the line disciplines. */ static void cy_unthrottle(struct tty_struct *tty) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; unsigned long flags; void __iomem *base_addr; int chip, channel, index; #ifdef CY_DEBUG_THROTTLE char buf[64]; printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n", tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) { return; } if (I_IXOFF(tty)) { if (info->x_char) info->x_char = 0; else cy_send_xchar(tty, START_CHAR(tty)); } if (tty->termios->c_cflag & CRTSCTS) { card = info->card; channel = info->line - card->first_line; if (!IS_CYC_Z(*card)) { chip = channel >> 2; channel &= 0x03; index = card->bus_index; base_addr = card->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&card->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) channel); if (info->rtsdtr_inv) { cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); } else { cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); } spin_unlock_irqrestore(&card->card_lock, flags); } else { info->throttle = 0; } } } /* cy_unthrottle */ /* cy_start and cy_stop provide software output flow control as a function of XON/XOFF, software CTS, and other such stuff. */ static void cy_stop(struct tty_struct *tty) { struct cyclades_card *cinfo; struct cyclades_port *info = tty->driver_data; void __iomem *base_addr; int chip, channel, index; unsigned long flags; #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_stop")) return; cinfo = info->card; channel = info->line - cinfo->first_line; if (!IS_CYC_Z(*cinfo)) { index = cinfo->bus_index; chip = channel >> 2; channel &= 0x03; base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&cinfo->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char)(channel & 0x0003)); /* index channel */ cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) & ~CyTxRdy); spin_unlock_irqrestore(&cinfo->card_lock, flags); } } /* cy_stop */ static void cy_start(struct tty_struct *tty) { struct cyclades_card *cinfo; struct cyclades_port *info = tty->driver_data; void __iomem *base_addr; int chip, channel, index; unsigned long flags; #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_start")) return; cinfo = info->card; channel = info->line - cinfo->first_line; index = cinfo->bus_index; if (!IS_CYC_Z(*cinfo)) { chip = channel >> 2; channel &= 0x03; base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); spin_lock_irqsave(&cinfo->card_lock, flags); cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */ cy_writeb(base_addr + (CySRER << index), readb(base_addr + (CySRER << index)) | CyTxRdy); spin_unlock_irqrestore(&cinfo->card_lock, flags); } } /* cy_start */ static void cy_flush_buffer(struct tty_struct *tty) { struct cyclades_port *info = tty->driver_data; struct cyclades_card *card; int channel, retval; unsigned long flags; #ifdef CY_DEBUG_IO printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) return; card = info->card; channel = info->line - card->first_line; spin_lock_irqsave(&card->card_lock, flags); info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; spin_unlock_irqrestore(&card->card_lock, flags); if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board buffers as well */ spin_lock_irqsave(&card->card_lock, flags); retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L); if (retval != 0) { printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d " "was %x\n", info->line, retval); } spin_unlock_irqrestore(&card->card_lock, flags); } tty_wakeup(tty); } /* cy_flush_buffer */ /* * cy_hangup() --- called by tty_hangup() when a hangup is signaled. */ static void cy_hangup(struct tty_struct *tty) { struct cyclades_port *info = tty->driver_data; #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->name, "cy_hangup")) return; cy_flush_buffer(tty); shutdown(info); info->event = 0; info->count = 0; #ifdef CY_DEBUG_COUNT printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n", current->pid); #endif info->tty = NULL; info->flags &= ~ASYNC_NORMAL_ACTIVE; wake_up_interruptible(&info->open_wait); } /* cy_hangup */ /* * --------------------------------------------------------------------- * cy_init() and friends * * cy_init() is called at boot-time to initialize the serial driver. * --------------------------------------------------------------------- */ static int __devinit cy_init_card(struct cyclades_card *cinfo) { struct cyclades_port *info; u32 mailbox; unsigned int nports; unsigned short chip_number; int index, port; spin_lock_init(&cinfo->card_lock); if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */ mailbox = readl(&((struct RUNTIME_9060 __iomem *) cinfo->ctl_addr)->mail_box_0); nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8; cinfo->intr_enabled = 0; cinfo->nports = 0; /* Will be correctly set later, after Z FW is loaded */ } else { index = cinfo->bus_index; nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips; } cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL); if (cinfo->ports == NULL) { printk(KERN_ERR "Cyclades: cannot allocate ports\n"); cinfo->nports = 0; return -ENOMEM; } for (port = cinfo->first_line; port < cinfo->first_line + nports; port++) { info = &cinfo->ports[port - cinfo->first_line]; info->magic = CYCLADES_MAGIC; info->card = cinfo; info->line = port; info->flags = STD_COM_FLAGS; info->closing_wait = CLOSING_WAIT_DELAY; info->close_delay = 5 * HZ / 10; INIT_WORK(&info->tqueue, do_softint); init_waitqueue_head(&info->open_wait); init_waitqueue_head(&info->close_wait); init_completion(&info->shutdown_wait); init_waitqueue_head(&info->delta_msr_wait); if (IS_CYC_Z(*cinfo)) { info->type = PORT_STARTECH; if (mailbox == ZO_V1) info->xmit_fifo_size = CYZ_FIFO_SIZE; else info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE; #ifdef CONFIG_CYZ_INTR setup_timer(&cyz_rx_full_timer[port], cyz_rx_restart, (unsigned long)info); #endif } else { info->type = PORT_CIRRUS; info->xmit_fifo_size = CyMAX_CHAR_FIFO; info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS; info->cor2 = CyETC; info->cor3 = 0x08; /* _very_ small rcv threshold */ chip_number = (port - cinfo->first_line) / 4; if ((info->chip_rev = readb(cinfo->base_addr + (cy_chip_offset[chip_number] << index) + (CyGFRCR << index))) >= CD1400_REV_J) { /* It is a CD1400 rev. J or later */ info->tbpr = baud_bpr_60[13]; /* Tx BPR */ info->tco = baud_co_60[13]; /* Tx CO */ info->rbpr = baud_bpr_60[13]; /* Rx BPR */ info->rco = baud_co_60[13]; /* Rx CO */ info->rtsdtr_inv = 1; } else { info->tbpr = baud_bpr_25[13]; /* Tx BPR */ info->tco = baud_co_25[13]; /* Tx CO */ info->rbpr = baud_bpr_25[13]; /* Rx BPR */ info->rco = baud_co_25[13]; /* Rx CO */ info->rtsdtr_inv = 0; } info->read_status_mask = CyTIMEOUT | CySPECHAR | CyBREAK | CyPARITY | CyFRAME | CyOVERRUN; } } #ifndef CONFIG_CYZ_INTR if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) { mod_timer(&cyz_timerlist, jiffies + 1); #ifdef CY_PCI_DEBUG printk(KERN_DEBUG "Cyclades-Z polling initialized\n"); #endif } #endif return 0; } /* initialize chips on Cyclom-Y card -- return number of valid chips (which is number of ports/4) */ static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr, int index) { unsigned int chip_number; void __iomem *base_addr; cy_writeb(true_base_addr + (Cy_HwReset << index), 0); /* Cy_HwReset is 0x1400 */ cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0); /* Cy_ClrIntr is 0x1800 */ udelay(500L); for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) { base_addr = true_base_addr + (cy_chip_offset[chip_number] << index); mdelay(1); if (readb(base_addr + (CyCCR << index)) != 0x00) { /************* printk(" chip #%d at %#6lx is never idle (CCR != 0)\n", chip_number, (unsigned long)base_addr); *************/ return chip_number; } cy_writeb(base_addr + (CyGFRCR << index), 0); udelay(10L); /* The Cyclom-16Y does not decode address bit 9 and therefore cannot distinguish between references to chip 0 and a non- existent chip 4. If the preceding clearing of the supposed chip 4 GFRCR register appears at chip 0, there is no chip 4 and this must be a Cyclom-16Y, not a Cyclom-32Ye. */ if (chip_number == 4 && readb(true_base_addr + (cy_chip_offset[0] << index) + (CyGFRCR << index)) == 0) { return chip_number; } cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET); mdelay(1); if (readb(base_addr + (CyGFRCR << index)) == 0x00) { /* printk(" chip #%d at %#6lx is not responding ", chip_number, (unsigned long)base_addr); printk("(GFRCR stayed 0)\n", */ return chip_number; } if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) != 0x40) { /* printk(" chip #%d at %#6lx is not valid (GFRCR == " "%#2x)\n", chip_number, (unsigned long)base_addr, base_addr[CyGFRCR<= CD1400_REV_J) { /* It is a CD1400 rev. J or later */ /* Impossible to reach 5ms with this chip. Changed to 2ms instead (f = 500 Hz). */ cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS); } else { /* f = 200 Hz */ cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS); } /* printk(" chip #%d at %#6lx is rev 0x%2x\n", chip_number, (unsigned long)base_addr, readb(base_addr+(CyGFRCR< NR_PORTS) { printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " "more channels are available. Change NR_PORTS " "in cyclades.c and recompile kernel.\n", (unsigned long)cy_isa_address); iounmap(cy_isa_address); return nboard; } /* fill the next cy_card structure available */ for (j = 0; j < NR_CARDS; j++) { if (cy_card[j].base_addr == NULL) break; } if (j == NR_CARDS) { /* no more cy_cards available */ printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " "more cards can be used. Change NR_CARDS in " "cyclades.c and recompile kernel.\n", (unsigned long)cy_isa_address); iounmap(cy_isa_address); return nboard; } /* allocate IRQ */ if (request_irq(cy_isa_irq, cyy_interrupt, IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) { printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but " "could not allocate IRQ#%d.\n", (unsigned long)cy_isa_address, cy_isa_irq); iounmap(cy_isa_address); return nboard; } /* set cy_card */ cy_card[j].base_addr = cy_isa_address; cy_card[j].ctl_addr = NULL; cy_card[j].irq = (int)cy_isa_irq; cy_card[j].bus_index = 0; cy_card[j].first_line = cy_next_channel; cy_card[j].num_chips = cy_isa_nchan / 4; if (cy_init_card(&cy_card[j])) { cy_card[j].base_addr = NULL; free_irq(cy_isa_irq, &cy_card[j]); iounmap(cy_isa_address); continue; } nboard++; printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: " "%d channels starting from port %d\n", j + 1, (unsigned long)cy_isa_address, (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)), cy_isa_irq, cy_isa_nchan, cy_next_channel); for (j = cy_next_channel; j < cy_next_channel + cy_isa_nchan; j++) tty_register_device(cy_serial_driver, j, NULL); cy_next_channel += cy_isa_nchan; } return nboard; #else return 0; #endif /* CONFIG_ISA */ } /* cy_detect_isa */ #ifdef CONFIG_PCI static void __devinit plx_init(void __iomem * addr, __u32 initctl) { /* Reset PLX */ cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000); udelay(100L); cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000); /* Reload Config. Registers from EEPROM */ cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000); udelay(100L); cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000); } static int __devinit cy_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { void __iomem *addr0 = NULL, *addr2 = NULL; char *card_name = NULL; u32 mailbox; unsigned int device_id, nchan = 0, card_no, i; unsigned char plx_ver; int retval, irq; retval = pci_enable_device(pdev); if (retval) { dev_err(&pdev->dev, "cannot enable device\n"); goto err; } /* read PCI configuration area */ irq = pdev->irq; device_id = pdev->device & ~PCI_DEVICE_ID_MASK; #if defined(__alpha__) if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */ dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low " "addresses on Alpha systems.\n"); retval = -EIO; goto err_dis; } #endif if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) { dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low " "addresses\n"); retval = -EIO; goto err_dis; } if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) { dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring " "it...\n"); pdev->resource[2].flags &= ~IORESOURCE_IO; } retval = pci_request_regions(pdev, "cyclades"); if (retval) { dev_err(&pdev->dev, "failed to reserve resources\n"); goto err_dis; } retval = -EIO; if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { card_name = "Cyclom-Y"; addr0 = pci_iomap(pdev, 0, CyPCI_Yctl); if (addr0 == NULL) { dev_err(&pdev->dev, "can't remap ctl region\n"); goto err_reg; } addr2 = pci_iomap(pdev, 2, CyPCI_Ywin); if (addr2 == NULL) { dev_err(&pdev->dev, "can't remap base region\n"); goto err_unmap; } nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1); if (nchan == 0) { dev_err(&pdev->dev, "Cyclom-Y PCI host card with no " "Serial-Modules\n"); return -EIO; } } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) { struct RUNTIME_9060 __iomem *ctl_addr; ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl); if (addr0 == NULL) { dev_err(&pdev->dev, "can't remap ctl region\n"); goto err_reg; } /* Disable interrupts on the PLX before resetting it */ cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900); plx_init(addr0, 0x6c); /* For some yet unknown reason, once the PLX9060 reloads the EEPROM, the IRQ is lost and, thus, we have to re-write it to the PCI config. registers. This will remain here until we find a permanent fix. */ pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq); mailbox = (u32)readl(&ctl_addr->mail_box_0); addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin); if (addr2 == NULL) { dev_err(&pdev->dev, "can't remap base region\n"); goto err_unmap; } if (mailbox == ZE_V1) { card_name = "Cyclades-Ze"; readl(&ctl_addr->mail_box_0); nchan = ZE_V1_NPORTS; } else { card_name = "Cyclades-8Zo"; #ifdef CY_PCI_DEBUG if (mailbox == ZO_V1) { cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA " "id %lx, ver %lx\n", (ulong)(0xff & readl(&((struct CUSTOM_REG *)addr2)-> fpga_id)), (ulong)(0xff & readl(&((struct CUSTOM_REG *)addr2)-> fpga_version))); cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); } else { dev_info(&pdev->dev, "Cyclades-Z/PCI: New " "Cyclades-Z board. FPGA not loaded\n"); } #endif /* The following clears the firmware id word. This ensures that the driver will not attempt to talk to the board until it has been properly initialized. */ if ((mailbox == ZO_V1) || (mailbox == ZO_V2)) cy_writel(addr2 + ID_ADDRESS, 0L); /* This must be a Cyclades-8Zo/PCI. The extendable version will have a different device_id and will be allocated its maximum number of ports. */ nchan = 8; } } if ((cy_next_channel + nchan) > NR_PORTS) { dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " "channels are available. Change NR_PORTS in " "cyclades.c and recompile kernel.\n"); goto err_unmap; } /* fill the next cy_card structure available */ for (card_no = 0; card_no < NR_CARDS; card_no++) { if (cy_card[card_no].base_addr == NULL) break; } if (card_no == NR_CARDS) { /* no more cy_cards available */ dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " "more cards can be used. Change NR_CARDS in " "cyclades.c and recompile kernel.\n"); goto err_unmap; } if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { /* allocate IRQ */ retval = request_irq(irq, cyy_interrupt, IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]); if (retval) { dev_err(&pdev->dev, "could not allocate IRQ\n"); goto err_unmap; } cy_card[card_no].num_chips = nchan / 4; } else { #ifdef CONFIG_CYZ_INTR /* allocate IRQ only if board has an IRQ */ if (irq != 0 && irq != 255) { retval = request_irq(irq, cyz_interrupt, IRQF_SHARED, "Cyclades-Z", &cy_card[card_no]); if (retval) { dev_err(&pdev->dev, "could not allocate IRQ\n"); goto err_unmap; } } #endif /* CONFIG_CYZ_INTR */ cy_card[card_no].num_chips = -1; } /* set cy_card */ cy_card[card_no].base_addr = addr2; cy_card[card_no].ctl_addr = addr0; cy_card[card_no].irq = irq; cy_card[card_no].bus_index = 1; cy_card[card_no].first_line = cy_next_channel; retval = cy_init_card(&cy_card[card_no]); if (retval) goto err_null; pci_set_drvdata(pdev, &cy_card[card_no]); if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { /* enable interrupts in the PCI interface */ plx_ver = readb(addr2 + CyPLX_VER) & 0x0f; switch (plx_ver) { case PLX_9050: cy_writeb(addr0 + 0x4c, 0x43); break; case PLX_9060: case PLX_9080: default: /* Old boards, use PLX_9060 */ plx_init(addr0, 0x6c); /* For some yet unknown reason, once the PLX9060 reloads the EEPROM, the IRQ is lost and, thus, we have to re-write it to the PCI config. registers. This will remain here until we find a permanent fix. */ pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq); cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900); break; } } dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from " "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel); for (i = cy_next_channel; i < cy_next_channel + nchan; i++) tty_register_device(cy_serial_driver, i, &pdev->dev); cy_next_channel += nchan; return 0; err_null: cy_card[card_no].base_addr = NULL; free_irq(irq, &cy_card[card_no]); err_unmap: pci_iounmap(pdev, addr0); if (addr2) pci_iounmap(pdev, addr2); err_reg: pci_release_regions(pdev); err_dis: pci_disable_device(pdev); err: return retval; } static void __devexit cy_pci_remove(struct pci_dev *pdev) { struct cyclades_card *cinfo = pci_get_drvdata(pdev); unsigned int i; /* non-Z with old PLX */ if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) == PLX_9050) cy_writeb(cinfo->ctl_addr + 0x4c, 0); else #ifndef CONFIG_CYZ_INTR if (!IS_CYC_Z(*cinfo)) #endif cy_writew(cinfo->ctl_addr + 0x68, readw(cinfo->ctl_addr + 0x68) & ~0x0900); pci_iounmap(pdev, cinfo->base_addr); if (cinfo->ctl_addr) pci_iounmap(pdev, cinfo->ctl_addr); if (cinfo->irq #ifndef CONFIG_CYZ_INTR && !IS_CYC_Z(*cinfo) #endif /* CONFIG_CYZ_INTR */ ) free_irq(cinfo->irq, cinfo); pci_release_regions(pdev); cinfo->base_addr = NULL; for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++) tty_unregister_device(cy_serial_driver, i); cinfo->nports = 0; kfree(cinfo->ports); } static struct pci_driver cy_pci_driver = { .name = "cyclades", .id_table = cy_pci_dev_id, .probe = cy_pci_probe, .remove = __devexit_p(cy_pci_remove) }; #endif static int cyclades_get_proc_info(char *buf, char **start, off_t offset, int length, int *eof, void *data) { struct cyclades_port *info; unsigned int i, j; int len = 0; off_t begin = 0; off_t pos = 0; int size; __u32 cur_jifs = jiffies; size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn " "IdleIn Overruns Ldisc\n"); pos += size; len += size; /* Output one line for each known port */ for (i = 0; i < NR_CARDS; i++) for (j = 0; j < cy_card[i].nports; j++) { info = &cy_card[i].ports[j]; if (info->count) size = sprintf(buf + len, "%3d %8lu %10lu %8lu " "%10lu %8lu %9lu %6ld\n", info->line, (cur_jifs - info->idle_stats.in_use) / HZ, info->idle_stats.xmit_bytes, (cur_jifs - info->idle_stats.xmit_idle)/ HZ, info->idle_stats.recv_bytes, (cur_jifs - info->idle_stats.recv_idle)/ HZ, info->idle_stats.overruns, (long)info->tty->ldisc.num); else size = sprintf(buf + len, "%3d %8lu %10lu %8lu " "%10lu %8lu %9lu %6ld\n", info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L); len += size; pos = begin + len; if (pos < offset) { len = 0; begin = pos; } if (pos > offset + length) goto done; } *eof = 1; done: *start = buf + (offset - begin); /* Start of wanted data */ len -= (offset - begin); /* Start slop */ if (len > length) len = length; /* Ending slop */ if (len < 0) len = 0; return len; } /* The serial driver boot-time initialization code! Hardware I/O ports are mapped to character special devices on a first found, first allocated manner. That is, this code searches for Cyclom cards in the system. As each is found, it is probed to discover how many chips (and thus how many ports) are present. These ports are mapped to the tty ports 32 and upward in monotonic fashion. If an 8-port card is replaced with a 16-port card, the port mapping on a following card will shift. This approach is different from what is used in the other serial device driver because the Cyclom is more properly a multiplexer, not just an aggregation of serial ports on one card. If there are more cards with more ports than have been statically allocated above, a warning is printed and the extra ports are ignored. */ static const struct tty_operations cy_ops = { .open = cy_open, .close = cy_close, .write = cy_write, .put_char = cy_put_char, .flush_chars = cy_flush_chars, .write_room = cy_write_room, .chars_in_buffer = cy_chars_in_buffer, .flush_buffer = cy_flush_buffer, .ioctl = cy_ioctl, .throttle = cy_throttle, .unthrottle = cy_unthrottle, .set_termios = cy_set_termios, .stop = cy_stop, .start = cy_start, .hangup = cy_hangup, .break_ctl = cy_break, .wait_until_sent = cy_wait_until_sent, .read_proc = cyclades_get_proc_info, .tiocmget = cy_tiocmget, .tiocmset = cy_tiocmset, }; static int __init cy_init(void) { unsigned int nboards; int retval = -ENOMEM; cy_serial_driver = alloc_tty_driver(NR_PORTS); if (!cy_serial_driver) goto err; printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n", __DATE__, __TIME__); /* Initialize the tty_driver structure */ cy_serial_driver->owner = THIS_MODULE; cy_serial_driver->driver_name = "cyclades"; cy_serial_driver->name = "ttyC"; cy_serial_driver->major = CYCLADES_MAJOR; cy_serial_driver->minor_start = 0; cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; cy_serial_driver->init_termios = tty_std_termios; cy_serial_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; tty_set_operations(cy_serial_driver, &cy_ops); retval = tty_register_driver(cy_serial_driver); if (retval) { printk(KERN_ERR "Couldn't register Cyclades serial driver\n"); goto err_frtty; } /* the code below is responsible to find the boards. Each different type of board has its own detection routine. If a board is found, the next cy_card structure available is set by the detection routine. These functions are responsible for checking the availability of cy_card and cy_port data structures and updating the cy_next_channel. */ /* look for isa boards */ nboards = cy_detect_isa(); #ifdef CONFIG_PCI /* look for pci boards */ retval = pci_register_driver(&cy_pci_driver); if (retval && !nboards) goto err_unr; #endif return 0; err_unr: tty_unregister_driver(cy_serial_driver); err_frtty: put_tty_driver(cy_serial_driver); err: return retval; } /* cy_init */ static void __exit cy_cleanup_module(void) { struct cyclades_card *card; int i, e1; #ifndef CONFIG_CYZ_INTR del_timer_sync(&cyz_timerlist); #endif /* CONFIG_CYZ_INTR */ if ((e1 = tty_unregister_driver(cy_serial_driver))) printk(KERN_ERR "failed to unregister Cyclades serial " "driver(%d)\n", e1); #ifdef CONFIG_PCI pci_unregister_driver(&cy_pci_driver); #endif for (i = 0; i < NR_CARDS; i++) { card = &cy_card[i]; if (card->base_addr) { /* clear interrupt */ cy_writeb(card->base_addr + Cy_ClrIntr, 0); iounmap(card->base_addr); if (card->ctl_addr) iounmap(card->ctl_addr); if (card->irq #ifndef CONFIG_CYZ_INTR && !IS_CYC_Z(*card) #endif /* CONFIG_CYZ_INTR */ ) free_irq(card->irq, card); for (e1 = card->first_line; e1 < card->first_line + card->nports; e1++) tty_unregister_device(cy_serial_driver, e1); kfree(card->ports); } } put_tty_driver(cy_serial_driver); } /* cy_cleanup_module */ module_init(cy_init); module_exit(cy_cleanup_module); MODULE_LICENSE("GPL"); MODULE_VERSION(CY_VERSION);