1/* 2 * pata_winbond.c - Winbond VLB ATA controllers 3 * (C) 2006 Red Hat <alan@redhat.com> 4 * 5 * Support for the Winbond 83759A when operating in advanced mode. 6 * Multichip mode is not currently supported. 7 */ 8 9#include <linux/kernel.h> 10#include <linux/module.h> 11#include <linux/init.h> 12#include <linux/blkdev.h> 13#include <linux/delay.h> 14#include <scsi/scsi_host.h> 15#include <linux/libata.h> 16#include <linux/platform_device.h> 17 18#define DRV_NAME "pata_winbond" 19#define DRV_VERSION "0.0.3" 20 21#define NR_HOST 4 /* Two winbond controllers, two channels each */ 22 23struct winbond_data { 24 unsigned long config; 25 struct platform_device *platform_dev; 26}; 27 28static struct ata_host *winbond_host[NR_HOST]; 29static struct winbond_data winbond_data[NR_HOST]; 30static int nr_winbond_host; 31 32#ifdef MODULE 33static int probe_winbond = 1; 34#else 35static int probe_winbond; 36#endif 37 38static DEFINE_SPINLOCK(winbond_lock); 39 40static void winbond_writecfg(unsigned long port, u8 reg, u8 val) 41{ 42 unsigned long flags; 43 spin_lock_irqsave(&winbond_lock, flags); 44 outb(reg, port + 0x01); 45 outb(val, port + 0x02); 46 spin_unlock_irqrestore(&winbond_lock, flags); 47} 48 49static u8 winbond_readcfg(unsigned long port, u8 reg) 50{ 51 u8 val; 52 53 unsigned long flags; 54 spin_lock_irqsave(&winbond_lock, flags); 55 outb(reg, port + 0x01); 56 val = inb(port + 0x02); 57 spin_unlock_irqrestore(&winbond_lock, flags); 58 59 return val; 60} 61 62static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev) 63{ 64 struct ata_timing t; 65 struct winbond_data *winbond = ap->host->private_data; 66 int active, recovery; 67 u8 reg; 68 int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2); 69 70 reg = winbond_readcfg(winbond->config, 0x81); 71 72 /* Get the timing data in cycles */ 73 if (reg & 0x40) /* Fast VLB bus, assume 50MHz */ 74 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000); 75 else 76 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000); 77 78 active = (FIT(t.active, 3, 17) - 1) & 0x0F; 79 recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F; 80 timing = (active << 4) | recovery; 81 winbond_writecfg(winbond->config, timing, reg); 82 83 /* Load the setup timing */ 84 85 reg = 0x35; 86 if (adev->class != ATA_DEV_ATA) 87 reg |= 0x08; /* FIFO off */ 88 if (!ata_pio_need_iordy(adev)) 89 reg |= 0x02; /* IORDY off */ 90 reg |= (FIT(t.setup, 0, 3) << 6); 91 winbond_writecfg(winbond->config, timing + 1, reg); 92} 93 94 95static void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data) 96{ 97 struct ata_port *ap = adev->ap; 98 int slop = buflen & 3; 99 100 if (ata_id_has_dword_io(adev->id)) { 101 if (write_data) 102 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); 103 else 104 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); 105 106 if (unlikely(slop)) { 107 u32 pad; 108 if (write_data) { 109 memcpy(&pad, buf + buflen - slop, slop); 110 pad = le32_to_cpu(pad); 111 iowrite32(pad, ap->ioaddr.data_addr); 112 } else { 113 pad = ioread32(ap->ioaddr.data_addr); 114 pad = cpu_to_le16(pad); 115 memcpy(buf + buflen - slop, &pad, slop); 116 } 117 } 118 } else 119 ata_data_xfer(adev, buf, buflen, write_data); 120} 121 122static struct scsi_host_template winbond_sht = { 123 .module = THIS_MODULE, 124 .name = DRV_NAME, 125 .ioctl = ata_scsi_ioctl, 126 .queuecommand = ata_scsi_queuecmd, 127 .can_queue = ATA_DEF_QUEUE, 128 .this_id = ATA_SHT_THIS_ID, 129 .sg_tablesize = LIBATA_MAX_PRD, 130 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 131 .emulated = ATA_SHT_EMULATED, 132 .use_clustering = ATA_SHT_USE_CLUSTERING, 133 .proc_name = DRV_NAME, 134 .dma_boundary = ATA_DMA_BOUNDARY, 135 .slave_configure = ata_scsi_slave_config, 136 .slave_destroy = ata_scsi_slave_destroy, 137 .bios_param = ata_std_bios_param, 138}; 139 140static struct ata_port_operations winbond_port_ops = { 141 .port_disable = ata_port_disable, 142 .set_piomode = winbond_set_piomode, 143 144 .tf_load = ata_tf_load, 145 .tf_read = ata_tf_read, 146 .check_status = ata_check_status, 147 .exec_command = ata_exec_command, 148 .dev_select = ata_std_dev_select, 149 150 .freeze = ata_bmdma_freeze, 151 .thaw = ata_bmdma_thaw, 152 .error_handler = ata_bmdma_error_handler, 153 .post_internal_cmd = ata_bmdma_post_internal_cmd, 154 .cable_detect = ata_cable_40wire, 155 156 .qc_prep = ata_qc_prep, 157 .qc_issue = ata_qc_issue_prot, 158 159 .data_xfer = winbond_data_xfer, 160 161 .irq_clear = ata_bmdma_irq_clear, 162 .irq_on = ata_irq_on, 163 .irq_ack = ata_irq_ack, 164 165 .port_start = ata_port_start, 166}; 167 168/** 169 * winbond_init_one - attach a winbond interface 170 * @type: Type to display 171 * @io: I/O port start 172 * @irq: interrupt line 173 * @fast: True if on a > 33Mhz VLB 174 * 175 * Register a VLB bus IDE interface. Such interfaces are PIO and we 176 * assume do not support IRQ sharing. 177 */ 178 179static __init int winbond_init_one(unsigned long port) 180{ 181 struct platform_device *pdev; 182 u8 reg; 183 int i, rc; 184 185 reg = winbond_readcfg(port, 0x81); 186 reg |= 0x80; /* jumpered mode off */ 187 winbond_writecfg(port, 0x81, reg); 188 reg = winbond_readcfg(port, 0x83); 189 reg |= 0xF0; /* local control */ 190 winbond_writecfg(port, 0x83, reg); 191 reg = winbond_readcfg(port, 0x85); 192 reg |= 0xF0; /* programmable timing */ 193 winbond_writecfg(port, 0x85, reg); 194 195 reg = winbond_readcfg(port, 0x81); 196 197 if (!(reg & 0x03)) /* Disabled */ 198 return 0; 199 200 for (i = 0; i < 2 ; i ++) { 201 unsigned long cmd_port = 0x1F0 - (0x80 * i); 202 struct ata_host *host; 203 struct ata_port *ap; 204 void __iomem *cmd_addr, *ctl_addr; 205 206 if (!(reg & (1 << i))) 207 continue; 208 209 pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0); 210 if (IS_ERR(pdev)) 211 return PTR_ERR(pdev); 212 213 rc = -ENOMEM; 214 host = ata_host_alloc(&pdev->dev, 1); 215 if (!host) 216 goto err_unregister; 217 218 rc = -ENOMEM; 219 cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8); 220 ctl_addr = devm_ioport_map(&pdev->dev, cmd_port + 0x0206, 1); 221 if (!cmd_addr || !ctl_addr) 222 goto err_unregister; 223 224 ap = host->ports[0]; 225 ap->ops = &winbond_port_ops; 226 ap->pio_mask = 0x1F; 227 ap->flags |= ATA_FLAG_SLAVE_POSS; 228 ap->ioaddr.cmd_addr = cmd_addr; 229 ap->ioaddr.altstatus_addr = ctl_addr; 230 ap->ioaddr.ctl_addr = ctl_addr; 231 ata_std_ports(&ap->ioaddr); 232 233 /* hook in a private data structure per channel */ 234 host->private_data = &winbond_data[nr_winbond_host]; 235 winbond_data[nr_winbond_host].config = port; 236 winbond_data[nr_winbond_host].platform_dev = pdev; 237 238 /* activate */ 239 rc = ata_host_activate(host, 14 + i, ata_interrupt, 0, 240 &winbond_sht); 241 if (rc) 242 goto err_unregister; 243 244 winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev); 245 } 246 247 return 0; 248 249 err_unregister: 250 platform_device_unregister(pdev); 251 return rc; 252} 253 254/** 255 * winbond_init - attach winbond interfaces 256 * 257 * Attach winbond IDE interfaces by scanning the ports it may occupy. 258 */ 259 260static __init int winbond_init(void) 261{ 262 static const unsigned long config[2] = { 0x130, 0x1B0 }; 263 264 int ct = 0; 265 int i; 266 267 if (probe_winbond == 0) 268 return -ENODEV; 269 270 /* 271 * Check both base addresses 272 */ 273 274 for (i = 0; i < 2; i++) { 275 if (probe_winbond & (1<<i)) { 276 int ret = 0; 277 unsigned long port = config[i]; 278 279 if (request_region(port, 2, "pata_winbond")) { 280 ret = winbond_init_one(port); 281 if(ret <= 0) 282 release_region(port, 2); 283 else ct+= ret; 284 } 285 } 286 } 287 if (ct != 0) 288 return 0; 289 return -ENODEV; 290} 291 292static __exit void winbond_exit(void) 293{ 294 int i; 295 296 for (i = 0; i < nr_winbond_host; i++) { 297 ata_host_detach(winbond_host[i]); 298 release_region(winbond_data[i].config, 2); 299 platform_device_unregister(winbond_data[i].platform_dev); 300 } 301} 302 303MODULE_AUTHOR("Alan Cox"); 304MODULE_DESCRIPTION("low-level driver for Winbond VL ATA"); 305MODULE_LICENSE("GPL"); 306MODULE_VERSION(DRV_VERSION); 307 308module_init(winbond_init); 309module_exit(winbond_exit); 310 311module_param(probe_winbond, int, 0); 312