Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 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 | */ |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 8 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 9 | #include <linux/kernel.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/pci.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/blkdev.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <scsi/scsi_host.h> |
| 16 | #include <linux/libata.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | |
| 19 | #define DRV_NAME "pata_winbond" |
Jeff Garzik | cb48cab | 2007-02-26 06:04:24 -0500 | [diff] [blame^] | 20 | #define DRV_VERSION "0.0.2" |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 21 | |
| 22 | #define NR_HOST 4 /* Two winbond controllers, two channels each */ |
| 23 | |
| 24 | struct winbond_data { |
| 25 | unsigned long config; |
| 26 | struct platform_device *platform_dev; |
| 27 | }; |
| 28 | |
| 29 | static struct ata_host *winbond_host[NR_HOST]; |
| 30 | static struct winbond_data winbond_data[NR_HOST]; |
| 31 | static int nr_winbond_host; |
| 32 | |
| 33 | #ifdef MODULE |
| 34 | static int probe_winbond = 1; |
| 35 | #else |
| 36 | static int probe_winbond; |
| 37 | #endif |
| 38 | |
| 39 | static spinlock_t winbond_lock = SPIN_LOCK_UNLOCKED; |
| 40 | |
| 41 | static void winbond_writecfg(unsigned long port, u8 reg, u8 val) |
| 42 | { |
| 43 | unsigned long flags; |
| 44 | spin_lock_irqsave(&winbond_lock, flags); |
| 45 | outb(reg, port + 0x01); |
| 46 | outb(val, port + 0x02); |
| 47 | spin_unlock_irqrestore(&winbond_lock, flags); |
| 48 | } |
| 49 | |
| 50 | static u8 winbond_readcfg(unsigned long port, u8 reg) |
| 51 | { |
| 52 | u8 val; |
| 53 | |
| 54 | unsigned long flags; |
| 55 | spin_lock_irqsave(&winbond_lock, flags); |
| 56 | outb(reg, port + 0x01); |
| 57 | val = inb(port + 0x02); |
| 58 | spin_unlock_irqrestore(&winbond_lock, flags); |
| 59 | |
| 60 | return val; |
| 61 | } |
| 62 | |
| 63 | static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev) |
| 64 | { |
| 65 | struct ata_timing t; |
| 66 | struct winbond_data *winbond = ap->host->private_data; |
| 67 | int active, recovery; |
| 68 | u8 reg; |
| 69 | int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2); |
| 70 | |
| 71 | reg = winbond_readcfg(winbond->config, 0x81); |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 72 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 73 | /* Get the timing data in cycles */ |
| 74 | if (reg & 0x40) /* Fast VLB bus, assume 50MHz */ |
| 75 | ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000); |
| 76 | else |
| 77 | ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000); |
| 78 | |
| 79 | active = (FIT(t.active, 3, 17) - 1) & 0x0F; |
| 80 | recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F; |
| 81 | timing = (active << 4) | recovery; |
| 82 | winbond_writecfg(winbond->config, timing, reg); |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 83 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 84 | /* Load the setup timing */ |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 85 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 86 | reg = 0x35; |
| 87 | if (adev->class != ATA_DEV_ATA) |
| 88 | reg |= 0x08; /* FIFO off */ |
| 89 | if (!ata_pio_need_iordy(adev)) |
| 90 | reg |= 0x02; /* IORDY off */ |
| 91 | reg |= (FIT(t.setup, 0, 3) << 6); |
| 92 | winbond_writecfg(winbond->config, timing + 1, reg); |
| 93 | } |
| 94 | |
| 95 | |
| 96 | static void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data) |
| 97 | { |
| 98 | struct ata_port *ap = adev->ap; |
| 99 | int slop = buflen & 3; |
| 100 | |
| 101 | if (ata_id_has_dword_io(adev->id)) { |
| 102 | if (write_data) |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 103 | iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 104 | else |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 105 | ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2); |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 106 | |
| 107 | if (unlikely(slop)) { |
| 108 | u32 pad; |
| 109 | if (write_data) { |
| 110 | memcpy(&pad, buf + buflen - slop, slop); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 111 | pad = le32_to_cpu(pad); |
| 112 | iowrite32(pad, ap->ioaddr.data_addr); |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 113 | } else { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 114 | pad = ioread32(ap->ioaddr.data_addr); |
| 115 | pad = cpu_to_le16(pad); |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 116 | memcpy(buf + buflen - slop, &pad, slop); |
| 117 | } |
| 118 | } |
| 119 | } else |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 120 | ata_data_xfer(adev, buf, buflen, write_data); |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | static struct scsi_host_template winbond_sht = { |
| 124 | .module = THIS_MODULE, |
| 125 | .name = DRV_NAME, |
| 126 | .ioctl = ata_scsi_ioctl, |
| 127 | .queuecommand = ata_scsi_queuecmd, |
| 128 | .can_queue = ATA_DEF_QUEUE, |
| 129 | .this_id = ATA_SHT_THIS_ID, |
| 130 | .sg_tablesize = LIBATA_MAX_PRD, |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 131 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
| 132 | .emulated = ATA_SHT_EMULATED, |
| 133 | .use_clustering = ATA_SHT_USE_CLUSTERING, |
| 134 | .proc_name = DRV_NAME, |
| 135 | .dma_boundary = ATA_DMA_BOUNDARY, |
| 136 | .slave_configure = ata_scsi_slave_config, |
Tejun Heo | c972b60 | 2006-11-29 12:10:46 +0900 | [diff] [blame] | 137 | .slave_destroy = ata_scsi_slave_destroy, |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 138 | .bios_param = ata_std_bios_param, |
| 139 | }; |
| 140 | |
| 141 | static struct ata_port_operations winbond_port_ops = { |
| 142 | .port_disable = ata_port_disable, |
| 143 | .set_piomode = winbond_set_piomode, |
| 144 | |
| 145 | .tf_load = ata_tf_load, |
| 146 | .tf_read = ata_tf_read, |
| 147 | .check_status = ata_check_status, |
| 148 | .exec_command = ata_exec_command, |
| 149 | .dev_select = ata_std_dev_select, |
| 150 | |
| 151 | .freeze = ata_bmdma_freeze, |
| 152 | .thaw = ata_bmdma_thaw, |
| 153 | .error_handler = ata_bmdma_error_handler, |
| 154 | .post_internal_cmd = ata_bmdma_post_internal_cmd, |
| 155 | |
| 156 | .qc_prep = ata_qc_prep, |
| 157 | .qc_issue = ata_qc_issue_prot, |
| 158 | |
| 159 | .data_xfer = winbond_data_xfer, |
| 160 | |
| 161 | .irq_handler = ata_interrupt, |
| 162 | .irq_clear = ata_bmdma_irq_clear, |
Akira Iguchi | 246ce3b | 2007-01-26 16:27:58 +0900 | [diff] [blame] | 163 | .irq_on = ata_irq_on, |
| 164 | .irq_ack = ata_irq_ack, |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 165 | |
| 166 | .port_start = ata_port_start, |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 167 | }; |
| 168 | |
| 169 | /** |
| 170 | * winbond_init_one - attach a winbond interface |
| 171 | * @type: Type to display |
| 172 | * @io: I/O port start |
| 173 | * @irq: interrupt line |
| 174 | * @fast: True if on a > 33Mhz VLB |
| 175 | * |
| 176 | * Register a VLB bus IDE interface. Such interfaces are PIO and we |
| 177 | * assume do not support IRQ sharing. |
| 178 | */ |
| 179 | |
| 180 | static __init int winbond_init_one(unsigned long port) |
| 181 | { |
| 182 | struct ata_probe_ent ae; |
| 183 | struct platform_device *pdev; |
| 184 | int ret; |
| 185 | u8 reg; |
| 186 | int i; |
| 187 | |
| 188 | reg = winbond_readcfg(port, 0x81); |
| 189 | reg |= 0x80; /* jumpered mode off */ |
| 190 | winbond_writecfg(port, 0x81, reg); |
| 191 | reg = winbond_readcfg(port, 0x83); |
| 192 | reg |= 0xF0; /* local control */ |
| 193 | winbond_writecfg(port, 0x83, reg); |
| 194 | reg = winbond_readcfg(port, 0x85); |
| 195 | reg |= 0xF0; /* programmable timing */ |
| 196 | winbond_writecfg(port, 0x85, reg); |
| 197 | |
| 198 | reg = winbond_readcfg(port, 0x81); |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 199 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 200 | if (!(reg & 0x03)) /* Disabled */ |
| 201 | return 0; |
| 202 | |
| 203 | for (i = 0; i < 2 ; i ++) { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 204 | unsigned long cmd_port = 0x1F0 - (0x80 * i); |
| 205 | void __iomem *cmd_addr, *ctl_addr; |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 206 | |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 207 | if (reg & (1 << i)) { |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 208 | /* |
| 209 | * Fill in a probe structure first of all |
| 210 | */ |
| 211 | |
| 212 | pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0); |
Akinobu Mita | 9825d73 | 2006-12-15 13:08:51 -0800 | [diff] [blame] | 213 | if (IS_ERR(pdev)) |
| 214 | return PTR_ERR(pdev); |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 215 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 216 | cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8); |
| 217 | ctl_addr = devm_ioport_map(&pdev->dev, cmd_port + 0x0206, 1); |
| 218 | if (!cmd_addr || !ctl_addr) { |
| 219 | platform_device_unregister(pdev); |
| 220 | return -ENOMEM; |
| 221 | } |
| 222 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 223 | memset(&ae, 0, sizeof(struct ata_probe_ent)); |
| 224 | INIT_LIST_HEAD(&ae.node); |
| 225 | ae.dev = &pdev->dev; |
| 226 | |
| 227 | ae.port_ops = &winbond_port_ops; |
| 228 | ae.pio_mask = 0x1F; |
| 229 | |
| 230 | ae.sht = &winbond_sht; |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 231 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 232 | ae.n_ports = 1; |
| 233 | ae.irq = 14 + i; |
| 234 | ae.irq_flags = 0; |
| 235 | ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST; |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 236 | ae.port[0].cmd_addr = cmd_addr; |
| 237 | ae.port[0].altstatus_addr = ctl_addr; |
| 238 | ae.port[0].ctl_addr = ctl_addr; |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 239 | ata_std_ports(&ae.port[0]); |
| 240 | /* |
| 241 | * Hook in a private data structure per channel |
| 242 | */ |
| 243 | ae.private_data = &winbond_data[nr_winbond_host]; |
| 244 | winbond_data[nr_winbond_host].config = port; |
| 245 | winbond_data[nr_winbond_host].platform_dev = pdev; |
| 246 | |
| 247 | ret = ata_device_add(&ae); |
| 248 | if (ret == 0) { |
| 249 | platform_device_unregister(pdev); |
| 250 | return -ENODEV; |
| 251 | } |
| 252 | winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * winbond_init - attach winbond interfaces |
| 261 | * |
| 262 | * Attach winbond IDE interfaces by scanning the ports it may occupy. |
| 263 | */ |
| 264 | |
| 265 | static __init int winbond_init(void) |
| 266 | { |
| 267 | static const unsigned long config[2] = { 0x130, 0x1B0 }; |
| 268 | |
| 269 | int ct = 0; |
| 270 | int i; |
Jeff Garzik | f20b16f | 2006-12-11 11:14:06 -0500 | [diff] [blame] | 271 | |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 272 | if (probe_winbond == 0) |
| 273 | return -ENODEV; |
| 274 | |
| 275 | /* |
| 276 | * Check both base addresses |
| 277 | */ |
| 278 | |
| 279 | for (i = 0; i < 2; i++) { |
| 280 | if (probe_winbond & (1<<i)) { |
| 281 | int ret = 0; |
| 282 | unsigned long port = config[i]; |
| 283 | |
| 284 | if (request_region(port, 2, "pata_winbond")) { |
| 285 | ret = winbond_init_one(port); |
| 286 | if(ret <= 0) |
| 287 | release_region(port, 2); |
| 288 | else ct+= ret; |
| 289 | } |
| 290 | } |
| 291 | } |
| 292 | if (ct != 0) |
| 293 | return 0; |
| 294 | return -ENODEV; |
| 295 | } |
| 296 | |
| 297 | static __exit void winbond_exit(void) |
| 298 | { |
| 299 | int i; |
| 300 | |
| 301 | for (i = 0; i < nr_winbond_host; i++) { |
Tejun Heo | 24dc5f3 | 2007-01-20 16:00:28 +0900 | [diff] [blame] | 302 | ata_host_detach(winbond_host[i]); |
Alan Cox | 7e45b0e | 2006-09-29 18:30:05 +0100 | [diff] [blame] | 303 | release_region(winbond_data[i].config, 2); |
| 304 | platform_device_unregister(winbond_data[i].platform_dev); |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | MODULE_AUTHOR("Alan Cox"); |
| 309 | MODULE_DESCRIPTION("low-level driver for Winbond VL ATA"); |
| 310 | MODULE_LICENSE("GPL"); |
| 311 | MODULE_VERSION(DRV_VERSION); |
| 312 | |
| 313 | module_init(winbond_init); |
| 314 | module_exit(winbond_exit); |
| 315 | |
| 316 | module_param(probe_winbond, int, 0); |
| 317 | |