/*- * Copyright (c) 1998, 1999 Nicolas Souchu * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: head/sys/dev/ppbus/immio.c 67164 2000-10-15 14:19:01Z phk $ * */ /* * Iomega ZIP+ Matchmaker Parallel Port Interface driver * * Thanks to David Campbell work on the Linux driver and the Iomega specs * Thanks to Thiebault Moeglin for the drive */ #ifdef _KERNEL #include #include #include #include #include #endif /* _KERNEL */ #ifdef _KERNEL #endif /* _KERNEL */ #include "opt_vpo.h" #include #include #include #include #include #include "ppbus_if.h" #define VP0_SELTMO 5000 /* select timeout */ #define VP0_FAST_SPINTMO 500000 /* wait status timeout */ #define VP0_LOW_SPINTMO 5000000 /* wait status timeout */ #define VP0_SECTOR_SIZE 512 /* * Microcode to execute very fast I/O sequences at the lowest bus level. */ #define SELECT_TARGET MS_PARAM(6, 1, MS_TYP_CHA) #define DECLARE_SELECT_MICROSEQUENCE \ struct ppb_microseq select_microseq[] = { \ MS_CASS(0xc), \ /* first, check there is nothing holding onto the bus */ \ MS_SET(VP0_SELTMO), \ /* _loop: */ \ MS_BRCLEAR(0x8, 2 /* _ready */), \ MS_DBRA(-2 /* _loop */), \ MS_RET(2), /* bus busy */ \ /* _ready: */ \ MS_CASS(0x4), \ MS_DASS(MS_UNKNOWN /* 0x80 | 1 << target */), \ MS_DELAY(1), \ MS_CASS(0xc), \ MS_CASS(0xd), \ /* now, wait until the drive is ready */ \ MS_SET(VP0_SELTMO), \ /* loop: */ \ MS_BRSET(0x8, 3 /* ready */), \ MS_DBRA(-2 /* loop */), \ /* error: */ \ MS_CASS(0xc), \ MS_RET(VP0_ESELECT_TIMEOUT), \ /* ready: */ \ MS_CASS(0xc), \ MS_RET(0) \ } static struct ppb_microseq transfer_epilog[] = { MS_CASS(0x4), MS_CASS(0xc), MS_CASS(0xe), MS_CASS(0x4), MS_RET(0) }; #define CPP_S1 MS_PARAM(10, 2, MS_TYP_PTR) #define CPP_S2 MS_PARAM(13, 2, MS_TYP_PTR) #define CPP_S3 MS_PARAM(16, 2, MS_TYP_PTR) #define CPP_PARAM MS_PARAM(17, 1, MS_TYP_CHA) #define DECLARE_CPP_MICROSEQ \ struct ppb_microseq cpp_microseq[] = { \ MS_CASS(0x0c), MS_DELAY(2), \ MS_DASS(0xaa), MS_DELAY(10), \ MS_DASS(0x55), MS_DELAY(10), \ MS_DASS(0x00), MS_DELAY(10), \ MS_DASS(0xff), MS_DELAY(10), \ MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s1 */), \ MS_DASS(0x87), MS_DELAY(10), \ MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s2 */), \ MS_DASS(0x78), MS_DELAY(10), \ MS_RFETCH(MS_REG_STR, 0x38, MS_UNKNOWN /* &s3 */), \ MS_DASS(MS_UNKNOWN /* param */), \ MS_DELAY(2), \ MS_CASS(0x0c), MS_DELAY(10), \ MS_CASS(0x0d), MS_DELAY(2), \ MS_CASS(0x0c), MS_DELAY(10), \ MS_DASS(0xff), MS_DELAY(10), \ MS_RET(0) \ } #define NEGOCIATED_MODE MS_PARAM(2, 1, MS_TYP_CHA) #define DECLARE_NEGOCIATE_MICROSEQ \ static struct ppb_microseq negociate_microseq[] = { \ MS_CASS(0x4), \ MS_DELAY(5), \ MS_DASS(MS_UNKNOWN /* mode */), \ MS_DELAY(100), \ MS_CASS(0x6), \ MS_DELAY(5), \ MS_BRSET(0x20, 5 /* continue */), \ MS_DELAY(5), \ MS_CASS(0x7), \ MS_DELAY(5), \ MS_CASS(0x6), \ MS_RET(VP0_ENEGOCIATE), \ /* continue: */ \ MS_DELAY(5), \ MS_CASS(0x7), \ MS_DELAY(5), \ MS_CASS(0x6), \ MS_RET(0) \ } static struct ppb_microseq reset_microseq[] = { MS_CASS(0x04), MS_DASS(0x40), MS_DELAY(1), MS_CASS(0x0c), MS_CASS(0x0d), MS_DELAY(50), MS_CASS(0x0c), MS_CASS(0x04), MS_RET(0) }; /* * nibble_inbyte_hook() * * Formats high and low nibble into a character */ static int nibble_inbyte_hook (void *p, char *ptr) { struct vpo_nibble *s = (struct vpo_nibble *)p; /* increment the buffer pointer */ *ptr = ((s->l >> 4) & 0x0f) + (s->h & 0xf0); return (0); } /* * Macro used to initialize each vpoio_data structure during * low level attachment * * XXX should be converted to ppb_MS_init_msq() */ #define INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo) { \ (vpo)->vpo_nibble_inbyte_msq[6].arg[2].p = \ (void *)&(vpo)->vpo_nibble.h; \ (vpo)->vpo_nibble_inbyte_msq[3].arg[2].p = \ (void *)&(vpo)->vpo_nibble.l; \ (vpo)->vpo_nibble_inbyte_msq[9].arg[0].f = \ nibble_inbyte_hook; \ (vpo)->vpo_nibble_inbyte_msq[9].arg[1].p = \ (void *)&(vpo)->vpo_nibble; \ } /* * This is the sub-microseqence for MS_GET in NIBBLE mode * Retrieve the two nibbles and call the C function to generate the character * and store it in the buffer (see nibble_inbyte_hook()) */ static struct ppb_microseq nibble_inbyte_submicroseq[] = { MS_CASS(0x4), /* loop: */ MS_CASS(0x6), MS_DELAY(1), MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* low nibble */), MS_CASS(0x5), MS_DELAY(1), MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* high nibble */), MS_CASS(0x4), MS_DELAY(1), /* do a C call to format the received nibbles */ MS_C_CALL(MS_UNKNOWN /* C hook */, MS_UNKNOWN /* param */), MS_DBRA(-7 /* loop */), MS_RET(0) }; /* * This is the sub-microseqence for MS_GET in PS2 mode */ static struct ppb_microseq ps2_inbyte_submicroseq[] = { MS_CASS(0x4), /* loop: */ MS_CASS(PCD | 0x6), MS_RFETCH_P(1, MS_REG_DTR, MS_FETCH_ALL), MS_CASS(PCD | 0x5), MS_DBRA(-4 /* loop */), MS_RET(0) }; /* * This is the sub-microsequence for MS_PUT in both NIBBLE and PS2 modes */ static struct ppb_microseq spp_outbyte_submicroseq[] = { MS_CASS(0x4), /* loop: */ MS_RASSERT_P(1, MS_REG_DTR), MS_CASS(0x5), MS_DBRA(0), /* decrement counter */ MS_RASSERT_P(1, MS_REG_DTR), MS_CASS(0x0), MS_DBRA(-6 /* loop */), /* return from the put call */ MS_CASS(0x4), MS_RET(0) }; /* EPP 1.7 microsequences, ptr and len set at runtime */ static struct ppb_microseq epp17_outstr[] = { MS_CASS(0x4), MS_RASSERT_P(MS_ACCUM, MS_REG_EPP_D), MS_CASS(0xc), MS_RET(0), }; static struct ppb_microseq epp17_instr[] = { MS_CASS(PCD | 0x4), MS_RFETCH_P(MS_ACCUM, MS_REG_EPP_D, MS_FETCH_ALL), MS_CASS(PCD | 0xc), MS_RET(0), }; static int imm_disconnect(struct vpoio_data *vpo, int *connected, int release_bus) { DECLARE_CPP_MICROSEQ; device_t ppbus = device_get_parent(vpo->vpo_dev); char s1, s2, s3; int ret; /* all should be ok */ if (connected) *connected = 0; ppb_MS_init_msq(cpp_microseq, 4, CPP_S1, (void *)&s1, CPP_S2, (void *)&s2, CPP_S3, (void *)&s3, CPP_PARAM, 0x30); ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x38)) { if (bootverbose) printf("imm%d: (disconnect) s1=0x%x s2=0x%x, s3=0x%x\n", vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff); if (connected) *connected = VP0_ECONNECT; } if (release_bus) return (ppb_release_bus(ppbus, vpo->vpo_dev)); else return (0); } /* * how : PPB_WAIT or PPB_DONTWAIT */ static int imm_connect(struct vpoio_data *vpo, int how, int *disconnected, int request_bus) { DECLARE_CPP_MICROSEQ; device_t ppbus = device_get_parent(vpo->vpo_dev); char s1, s2, s3; int error; int ret; /* all should be ok */ if (disconnected) *disconnected = 0; if (request_bus) if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, how))) return (error); ppb_MS_init_msq(cpp_microseq, 3, CPP_S1, (void *)&s1, CPP_S2, (void *)&s2, CPP_S3, (void *)&s3); /* select device 0 in compatible mode */ ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); /* disconnect all devices */ ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x30); ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); if (PPB_IN_EPP_MODE(ppbus)) ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x28); else ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0); ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret); if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x30)) { if (bootverbose) printf("imm%d: (connect) s1=0x%x s2=0x%x, s3=0x%x\n", vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff); if (disconnected) *disconnected = VP0_ECONNECT; } return (0); } /* * imm_detect() * * Detect and initialise the VP0 adapter. */ static int imm_detect(struct vpoio_data *vpo) { device_t ppbus = device_get_parent(vpo->vpo_dev); int error; if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, PPB_DONTWAIT))) return (error); /* disconnect the drive, keep the bus */ imm_disconnect(vpo, NULL, 0); /* we already have the bus, just connect */ imm_connect(vpo, PPB_DONTWAIT, &error, 0); if (error) { if (bootverbose) printf("imm%d: can't connect to the drive\n", vpo->vpo_unit); goto error; } /* send SCSI reset signal */ ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL); /* release the bus now */ imm_disconnect(vpo, &error, 1); /* ensure we are disconnected or daisy chained peripheral * may cause serious problem to the disk */ if (error) { if (bootverbose) printf("imm%d: can't disconnect from the drive\n", vpo->vpo_unit); goto error; } return (0); error: ppb_release_bus(ppbus, vpo->vpo_dev); return (VP0_EINITFAILED); } /* * imm_outstr() */ static int imm_outstr(struct vpoio_data *vpo, char *buffer, int size) { device_t ppbus = device_get_parent(vpo->vpo_dev); int error = 0; if (PPB_IN_EPP_MODE(ppbus)) ppb_reset_epp_timeout(ppbus); ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_PUT, (union ppb_insarg)buffer, (union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error); return (error); } /* * imm_instr() */ static int imm_instr(struct vpoio_data *vpo, char *buffer, int size) { device_t ppbus = device_get_parent(vpo->vpo_dev); int error = 0; if (PPB_IN_EPP_MODE(ppbus)) ppb_reset_epp_timeout(ppbus); ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_GET, (union ppb_insarg)buffer, (union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error); return (error); } static char imm_select(struct vpoio_data *vpo, int initiator, int target) { DECLARE_SELECT_MICROSEQUENCE; device_t ppbus = device_get_parent(vpo->vpo_dev); int ret; /* initialize the select microsequence */ ppb_MS_init_msq(select_microseq, 1, SELECT_TARGET, 1 << initiator | 1 << target); ppb_MS_microseq(ppbus, vpo->vpo_dev, select_microseq, &ret); return (ret); } /* * imm_wait() * * H_SELIN must be low. * * XXX should be ported to microseq */ static char imm_wait(struct vpoio_data *vpo, int tmo) { device_t ppbus = device_get_parent(vpo->vpo_dev); register int k; register char r; ppb_wctr(ppbus, 0xc); /* XXX should be ported to microseq */ k = 0; while (!((r = ppb_rstr(ppbus)) & 0x80) && (k++ < tmo)) DELAY(1); /* * Return some status information. * Semantics : 0x88 = ZIP+ wants more data * 0x98 = ZIP+ wants to send more data * 0xa8 = ZIP+ wants command * 0xb8 = end of transfer, ZIP+ is sending status */ ppb_wctr(ppbus, 0x4); if (k < tmo) return (r & 0xb8); return (0); /* command timed out */ } static int imm_negociate(struct vpoio_data *vpo) { DECLARE_NEGOCIATE_MICROSEQ; device_t ppbus = device_get_parent(vpo->vpo_dev); int negociate_mode; int ret; if (PPB_IN_NIBBLE_MODE(ppbus)) negociate_mode = 0; else if (PPB_IN_PS2_MODE(ppbus)) negociate_mode = 1; else return (0); #if 0 /* XXX use standalone code not to depend on ppb_1284 code yet */ ret = ppb_1284_negociate(ppbus, negociate_mode); if (ret) return (VP0_ENEGOCIATE); #endif ppb_MS_init_msq(negociate_microseq, 1, NEGOCIATED_MODE, negociate_mode); ppb_MS_microseq(ppbus, vpo->vpo_dev, negociate_microseq, &ret); return (ret); } /* * imm_probe() * * Low level probe of vpo device * */ int imm_probe(device_t dev, struct vpoio_data *vpo) { int error; /* ppbus dependent initialisation */ vpo->vpo_dev = dev; /* now, try to initialise the drive */ if ((error = imm_detect(vpo))) { return (error); } return (0); } /* * imm_attach() * * Low level attachment of vpo device * */ int imm_attach(struct vpoio_data *vpo) { device_t ppbus = device_get_parent(vpo->vpo_dev); int epp; /* * Initialize microsequence code */ vpo->vpo_nibble_inbyte_msq = (struct ppb_microseq *)malloc( sizeof(nibble_inbyte_submicroseq), M_DEVBUF, M_NOWAIT); if (!vpo->vpo_nibble_inbyte_msq) return (ENXIO); bcopy((void *)nibble_inbyte_submicroseq, (void *)vpo->vpo_nibble_inbyte_msq, sizeof(nibble_inbyte_submicroseq)); INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo); /* * Initialize mode dependent in/out microsequences */ ppb_request_bus(ppbus, vpo->vpo_dev, PPB_WAIT); /* enter NIBBLE mode to configure submsq */ if (ppb_set_mode(ppbus, PPB_NIBBLE) != -1) { ppb_MS_GET_init(ppbus, vpo->vpo_dev, vpo->vpo_nibble_inbyte_msq); ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq); } /* enter PS2 mode to configure submsq */ if (ppb_set_mode(ppbus, PPB_PS2) != -1) { ppb_MS_GET_init(ppbus, vpo->vpo_dev, ps2_inbyte_submicroseq); ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq); } epp = ppb_get_epp_protocol(ppbus); /* enter EPP mode to configure submsq */ if (ppb_set_mode(ppbus, PPB_EPP) != -1) { switch (epp) { case EPP_1_9: case EPP_1_7: ppb_MS_GET_init(ppbus, vpo->vpo_dev, epp17_instr); ppb_MS_PUT_init(ppbus, vpo->vpo_dev, epp17_outstr); break; default: panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__, epp); } } /* try to enter EPP or PS/2 mode, NIBBLE otherwise */ if (ppb_set_mode(ppbus, PPB_EPP) != -1) { switch (epp) { case EPP_1_9: printf("imm%d: EPP 1.9 mode\n", vpo->vpo_unit); break; case EPP_1_7: printf("imm%d: EPP 1.7 mode\n", vpo->vpo_unit); break; default: panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__, epp); } } else if (ppb_set_mode(ppbus, PPB_PS2) != -1) printf("imm%d: PS2 mode\n", vpo->vpo_unit); else if (ppb_set_mode(ppbus, PPB_NIBBLE) != -1) printf("imm%d: NIBBLE mode\n", vpo->vpo_unit); else { printf("imm%d: can't enter NIBBLE, PS2 or EPP mode\n", vpo->vpo_unit); ppb_release_bus(ppbus, vpo->vpo_dev); free(vpo->vpo_nibble_inbyte_msq, M_DEVBUF); return (ENXIO); } ppb_release_bus(ppbus, vpo->vpo_dev); return (0); } /* * imm_reset_bus() * */ int imm_reset_bus(struct vpoio_data *vpo) { device_t ppbus = device_get_parent(vpo->vpo_dev); int disconnected; /* first, connect to the drive and request the bus */ imm_connect(vpo, PPB_WAIT|PPB_INTR, &disconnected, 1); if (!disconnected) { /* reset the SCSI bus */ ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL); /* then disconnect */ imm_disconnect(vpo, NULL, 1); } return (0); } /* * imm_do_scsi() * * Send an SCSI command * */ int imm_do_scsi(struct vpoio_data *vpo, int host, int target, char *command, int clen, char *buffer, int blen, int *result, int *count, int *ret) { device_t ppbus = device_get_parent(vpo->vpo_dev); register char r; char l, h = 0; int len, error = 0, not_connected = 0; register int k; int negociated = 0; /* * enter disk state, allocate the ppbus * * XXX * Should we allow this call to be interruptible? * The only way to report the interruption is to return * EIO do upper SCSI code :^( */ if ((error = imm_connect(vpo, PPB_WAIT|PPB_INTR, ¬_connected, 1))) return (error); if (not_connected) { *ret = VP0_ECONNECT; goto error; } /* * Select the drive ... */ if ((*ret = imm_select(vpo,host,target))) goto error; /* * Send the command ... */ for (k = 0; k < clen; k+=2) { if (imm_wait(vpo, VP0_FAST_SPINTMO) != (char)0xa8) { *ret = VP0_ECMD_TIMEOUT; goto error; } if (imm_outstr(vpo, &command[k], 2)) { *ret = VP0_EPPDATA_TIMEOUT; goto error; } } if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { *ret = VP0_ESTATUS_TIMEOUT; goto error; } if ((r & 0x30) == 0x10) { if (imm_negociate(vpo)) { *ret = VP0_ENEGOCIATE; goto error; } else negociated = 1; } /* * Complete transfer ... */ *count = 0; for (;;) { if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) { *ret = VP0_ESTATUS_TIMEOUT; goto error; } /* stop when the ZIP+ wants to send status */ if (r == (char)0xb8) break; if (*count >= blen) { *ret = VP0_EDATA_OVERFLOW; goto error; } /* ZIP+ wants to send data? */ if (r == (char)0x88) { len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? VP0_SECTOR_SIZE : 2; error = imm_outstr(vpo, &buffer[*count], len); } else { if (!PPB_IN_EPP_MODE(ppbus)) len = 1; else len = (((blen - *count) >= VP0_SECTOR_SIZE)) ? VP0_SECTOR_SIZE : 1; error = imm_instr(vpo, &buffer[*count], len); } if (error) { *ret = error; goto error; } *count += len; } if ((PPB_IN_NIBBLE_MODE(ppbus) || PPB_IN_PS2_MODE(ppbus)) && negociated) ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL); /* * Retrieve status ... */ if (imm_negociate(vpo)) { *ret = VP0_ENEGOCIATE; goto error; } else negociated = 1; if (imm_instr(vpo, &l, 1)) { *ret = VP0_EOTHER; goto error; } /* check if the ZIP+ wants to send more status */ if (imm_wait(vpo, VP0_FAST_SPINTMO) == (char)0xb8) if (imm_instr(vpo, &h, 1)) { *ret = VP0_EOTHER+2; goto error; } *result = ((int) h << 8) | ((int) l & 0xff); error: if ((PPB_IN_NIBBLE_MODE(ppbus) || PPB_IN_PS2_MODE(ppbus)) && negociated) ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL); /* return to printer state, release the ppbus */ imm_disconnect(vpo, NULL, 1); return (0); }