unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/block/mg_disk.c |
| 3 | * |
| 4 | * Support for the mGine m[g]flash IO mode. |
| 5 | * Based on legacy hd.c |
| 6 | * |
| 7 | * (c) 2008 mGine Co.,LTD |
| 8 | * (c) 2008 unsik Kim <donari75@gmail.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/fs.h> |
| 18 | #include <linux/blkdev.h> |
| 19 | #include <linux/hdreg.h> |
Bartlomiej Zolnierkiewicz | 8a11a78 | 2009-04-28 13:06:16 +0900 | [diff] [blame] | 20 | #include <linux/ata.h> |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/platform_device.h> |
| 24 | #include <linux/gpio.h> |
unsik Kim | 5ced504 | 2009-06-16 08:40:20 +0200 | [diff] [blame] | 25 | #include <linux/mg_disk.h> |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 26 | |
| 27 | #define MG_RES_SEC (CONFIG_MG_DISK_RES << 1) |
| 28 | |
Tejun Heo | eec9462 | 2009-04-28 13:06:14 +0900 | [diff] [blame] | 29 | /* name for block device */ |
| 30 | #define MG_DISK_NAME "mgd" |
Tejun Heo | eec9462 | 2009-04-28 13:06:14 +0900 | [diff] [blame] | 31 | |
| 32 | #define MG_DISK_MAJ 0 |
| 33 | #define MG_DISK_MAX_PART 16 |
| 34 | #define MG_SECTOR_SIZE 512 |
| 35 | #define MG_MAX_SECTS 256 |
| 36 | |
| 37 | /* Register offsets */ |
| 38 | #define MG_BUFF_OFFSET 0x8000 |
| 39 | #define MG_STORAGE_BUFFER_SIZE 0x200 |
| 40 | #define MG_REG_OFFSET 0xC000 |
| 41 | #define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */ |
| 42 | #define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */ |
| 43 | #define MG_REG_SECT_CNT (MG_REG_OFFSET + 4) |
| 44 | #define MG_REG_SECT_NUM (MG_REG_OFFSET + 6) |
| 45 | #define MG_REG_CYL_LOW (MG_REG_OFFSET + 8) |
| 46 | #define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA) |
| 47 | #define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC) |
| 48 | #define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */ |
| 49 | #define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */ |
| 50 | #define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10) |
| 51 | #define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12) |
| 52 | |
Tejun Heo | eec9462 | 2009-04-28 13:06:14 +0900 | [diff] [blame] | 53 | /* handy status */ |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 54 | #define MG_STAT_READY (ATA_DRDY | ATA_DSC) |
| 55 | #define MG_READY_OK(s) (((s) & (MG_STAT_READY | (ATA_BUSY | ATA_DF | \ |
| 56 | ATA_ERR))) == MG_STAT_READY) |
Tejun Heo | eec9462 | 2009-04-28 13:06:14 +0900 | [diff] [blame] | 57 | |
| 58 | /* error code for others */ |
| 59 | #define MG_ERR_NONE 0 |
| 60 | #define MG_ERR_TIMEOUT 0x100 |
| 61 | #define MG_ERR_INIT_STAT 0x101 |
| 62 | #define MG_ERR_TRANSLATION 0x102 |
| 63 | #define MG_ERR_CTRL_RST 0x103 |
| 64 | #define MG_ERR_INV_STAT 0x104 |
| 65 | #define MG_ERR_RSTOUT 0x105 |
| 66 | |
| 67 | #define MG_MAX_ERRORS 6 /* Max read/write errors */ |
| 68 | |
| 69 | /* command */ |
| 70 | #define MG_CMD_RD 0x20 |
| 71 | #define MG_CMD_WR 0x30 |
| 72 | #define MG_CMD_SLEEP 0x99 |
| 73 | #define MG_CMD_WAKEUP 0xC3 |
| 74 | #define MG_CMD_ID 0xEC |
| 75 | #define MG_CMD_WR_CONF 0x3C |
| 76 | #define MG_CMD_RD_CONF 0x40 |
| 77 | |
| 78 | /* operation mode */ |
| 79 | #define MG_OP_CASCADE (1 << 0) |
| 80 | #define MG_OP_CASCADE_SYNC_RD (1 << 1) |
| 81 | #define MG_OP_CASCADE_SYNC_WR (1 << 2) |
| 82 | #define MG_OP_INTERLEAVE (1 << 3) |
| 83 | |
| 84 | /* synchronous */ |
| 85 | #define MG_BURST_LAT_4 (3 << 4) |
| 86 | #define MG_BURST_LAT_5 (4 << 4) |
| 87 | #define MG_BURST_LAT_6 (5 << 4) |
| 88 | #define MG_BURST_LAT_7 (6 << 4) |
| 89 | #define MG_BURST_LAT_8 (7 << 4) |
| 90 | #define MG_BURST_LEN_4 (1 << 1) |
| 91 | #define MG_BURST_LEN_8 (2 << 1) |
| 92 | #define MG_BURST_LEN_16 (3 << 1) |
| 93 | #define MG_BURST_LEN_32 (4 << 1) |
| 94 | #define MG_BURST_LEN_CONT (0 << 1) |
| 95 | |
| 96 | /* timeout value (unit: ms) */ |
| 97 | #define MG_TMAX_CONF_TO_CMD 1 |
| 98 | #define MG_TMAX_WAIT_RD_DRQ 10 |
| 99 | #define MG_TMAX_WAIT_WR_DRQ 500 |
| 100 | #define MG_TMAX_RST_TO_BUSY 10 |
| 101 | #define MG_TMAX_HDRST_TO_RDY 500 |
| 102 | #define MG_TMAX_SWRST_TO_RDY 500 |
| 103 | #define MG_TMAX_RSTOUT 3000 |
| 104 | |
Tejun Heo | eec9462 | 2009-04-28 13:06:14 +0900 | [diff] [blame] | 105 | #define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST) |
| 106 | |
Tejun Heo | eec9462 | 2009-04-28 13:06:14 +0900 | [diff] [blame] | 107 | /* main structure for mflash driver */ |
| 108 | struct mg_host { |
| 109 | struct device *dev; |
| 110 | |
| 111 | struct request_queue *breq; |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 112 | struct request *req; |
Tejun Heo | eec9462 | 2009-04-28 13:06:14 +0900 | [diff] [blame] | 113 | spinlock_t lock; |
| 114 | struct gendisk *gd; |
| 115 | |
| 116 | struct timer_list timer; |
| 117 | void (*mg_do_intr) (struct mg_host *); |
| 118 | |
| 119 | u16 id[ATA_ID_WORDS]; |
| 120 | |
| 121 | u16 cyls; |
| 122 | u16 heads; |
| 123 | u16 sectors; |
| 124 | u32 n_sectors; |
| 125 | u32 nres_sectors; |
| 126 | |
| 127 | void __iomem *dev_base; |
| 128 | unsigned int irq; |
| 129 | unsigned int rst; |
| 130 | unsigned int rstout; |
| 131 | |
| 132 | u32 major; |
| 133 | u32 error; |
| 134 | }; |
| 135 | |
| 136 | /* |
| 137 | * Debugging macro and defines |
| 138 | */ |
| 139 | #undef DO_MG_DEBUG |
| 140 | #ifdef DO_MG_DEBUG |
| 141 | # define MG_DBG(fmt, args...) \ |
| 142 | printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args) |
| 143 | #else /* CONFIG_MG_DEBUG */ |
| 144 | # define MG_DBG(fmt, args...) do { } while (0) |
| 145 | #endif /* CONFIG_MG_DEBUG */ |
| 146 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 147 | static void mg_request(struct request_queue *); |
| 148 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 149 | static bool mg_end_request(struct mg_host *host, int err, unsigned int nr_bytes) |
| 150 | { |
| 151 | if (__blk_end_request(host->req, err, nr_bytes)) |
| 152 | return true; |
| 153 | |
| 154 | host->req = NULL; |
| 155 | return false; |
| 156 | } |
| 157 | |
| 158 | static bool mg_end_request_cur(struct mg_host *host, int err) |
| 159 | { |
| 160 | return mg_end_request(host, err, blk_rq_cur_bytes(host->req)); |
| 161 | } |
| 162 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 163 | static void mg_dump_status(const char *msg, unsigned int stat, |
| 164 | struct mg_host *host) |
| 165 | { |
| 166 | char *name = MG_DISK_NAME; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 167 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 168 | if (host->req) |
| 169 | name = host->req->rq_disk->disk_name; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 170 | |
| 171 | printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 172 | if (stat & ATA_BUSY) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 173 | printk("Busy "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 174 | if (stat & ATA_DRDY) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 175 | printk("DriveReady "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 176 | if (stat & ATA_DF) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 177 | printk("WriteFault "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 178 | if (stat & ATA_DSC) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 179 | printk("SeekComplete "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 180 | if (stat & ATA_DRQ) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 181 | printk("DataRequest "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 182 | if (stat & ATA_CORR) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 183 | printk("CorrectedError "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 184 | if (stat & ATA_ERR) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 185 | printk("Error "); |
| 186 | printk("}\n"); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 187 | if ((stat & ATA_ERR) == 0) { |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 188 | host->error = 0; |
| 189 | } else { |
| 190 | host->error = inb((unsigned long)host->dev_base + MG_REG_ERROR); |
| 191 | printk(KERN_ERR "%s: %s: error=0x%02x { ", name, msg, |
| 192 | host->error & 0xff); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 193 | if (host->error & ATA_BBK) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 194 | printk("BadSector "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 195 | if (host->error & ATA_UNC) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 196 | printk("UncorrectableError "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 197 | if (host->error & ATA_IDNF) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 198 | printk("SectorIdNotFound "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 199 | if (host->error & ATA_ABORTED) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 200 | printk("DriveStatusError "); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 201 | if (host->error & ATA_AMNF) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 202 | printk("AddrMarkNotFound "); |
| 203 | printk("}"); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 204 | if (host->error & (ATA_BBK | ATA_UNC | ATA_IDNF | ATA_AMNF)) { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 205 | if (host->req) |
| 206 | printk(", sector=%u", |
| 207 | (unsigned int)blk_rq_pos(host->req)); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 208 | } |
| 209 | printk("\n"); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | static unsigned int mg_wait(struct mg_host *host, u32 expect, u32 msec) |
| 214 | { |
| 215 | u8 status; |
| 216 | unsigned long expire, cur_jiffies; |
| 217 | struct mg_drv_data *prv_data = host->dev->platform_data; |
| 218 | |
| 219 | host->error = MG_ERR_NONE; |
| 220 | expire = jiffies + msecs_to_jiffies(msec); |
| 221 | |
| 222 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); |
| 223 | |
| 224 | do { |
| 225 | cur_jiffies = jiffies; |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 226 | if (status & ATA_BUSY) { |
| 227 | if (expect == ATA_BUSY) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 228 | break; |
| 229 | } else { |
| 230 | /* Check the error condition! */ |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 231 | if (status & ATA_ERR) { |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 232 | mg_dump_status("mg_wait", status, host); |
| 233 | break; |
| 234 | } |
| 235 | |
| 236 | if (expect == MG_STAT_READY) |
| 237 | if (MG_READY_OK(status)) |
| 238 | break; |
| 239 | |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 240 | if (expect == ATA_DRQ) |
| 241 | if (status & ATA_DRQ) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 242 | break; |
| 243 | } |
| 244 | if (!msec) { |
| 245 | mg_dump_status("not ready", status, host); |
| 246 | return MG_ERR_INV_STAT; |
| 247 | } |
| 248 | if (prv_data->use_polling) |
| 249 | msleep(1); |
| 250 | |
| 251 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); |
| 252 | } while (time_before(cur_jiffies, expire)); |
| 253 | |
| 254 | if (time_after_eq(cur_jiffies, expire) && msec) |
| 255 | host->error = MG_ERR_TIMEOUT; |
| 256 | |
| 257 | return host->error; |
| 258 | } |
| 259 | |
| 260 | static unsigned int mg_wait_rstout(u32 rstout, u32 msec) |
| 261 | { |
| 262 | unsigned long expire; |
| 263 | |
| 264 | expire = jiffies + msecs_to_jiffies(msec); |
| 265 | while (time_before(jiffies, expire)) { |
| 266 | if (gpio_get_value(rstout) == 1) |
| 267 | return MG_ERR_NONE; |
| 268 | msleep(10); |
| 269 | } |
| 270 | |
| 271 | return MG_ERR_RSTOUT; |
| 272 | } |
| 273 | |
| 274 | static void mg_unexpected_intr(struct mg_host *host) |
| 275 | { |
| 276 | u32 status = inb((unsigned long)host->dev_base + MG_REG_STATUS); |
| 277 | |
| 278 | mg_dump_status("mg_unexpected_intr", status, host); |
| 279 | } |
| 280 | |
| 281 | static irqreturn_t mg_irq(int irq, void *dev_id) |
| 282 | { |
| 283 | struct mg_host *host = dev_id; |
| 284 | void (*handler)(struct mg_host *) = host->mg_do_intr; |
| 285 | |
Tejun Heo | ac2ff94 | 2009-04-28 12:38:32 +0900 | [diff] [blame] | 286 | spin_lock(&host->lock); |
| 287 | |
| 288 | host->mg_do_intr = NULL; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 289 | del_timer(&host->timer); |
| 290 | if (!handler) |
| 291 | handler = mg_unexpected_intr; |
| 292 | handler(host); |
Tejun Heo | ac2ff94 | 2009-04-28 12:38:32 +0900 | [diff] [blame] | 293 | |
| 294 | spin_unlock(&host->lock); |
| 295 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 296 | return IRQ_HANDLED; |
| 297 | } |
| 298 | |
Bartlomiej Zolnierkiewicz | 8a11a78 | 2009-04-28 13:06:16 +0900 | [diff] [blame] | 299 | /* local copy of ata_id_string() */ |
| 300 | static void mg_id_string(const u16 *id, unsigned char *s, |
| 301 | unsigned int ofs, unsigned int len) |
| 302 | { |
| 303 | unsigned int c; |
| 304 | |
| 305 | BUG_ON(len & 1); |
| 306 | |
| 307 | while (len > 0) { |
| 308 | c = id[ofs] >> 8; |
| 309 | *s = c; |
| 310 | s++; |
| 311 | |
| 312 | c = id[ofs] & 0xff; |
| 313 | *s = c; |
| 314 | s++; |
| 315 | |
| 316 | ofs++; |
| 317 | len -= 2; |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | /* local copy of ata_id_c_string() */ |
| 322 | static void mg_id_c_string(const u16 *id, unsigned char *s, |
| 323 | unsigned int ofs, unsigned int len) |
| 324 | { |
| 325 | unsigned char *p; |
| 326 | |
| 327 | mg_id_string(id, s, ofs, len - 1); |
| 328 | |
| 329 | p = s + strnlen(s, len - 1); |
| 330 | while (p > s && p[-1] == ' ') |
| 331 | p--; |
| 332 | *p = '\0'; |
| 333 | } |
| 334 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 335 | static int mg_get_disk_id(struct mg_host *host) |
| 336 | { |
| 337 | u32 i; |
| 338 | s32 err; |
| 339 | const u16 *id = host->id; |
| 340 | struct mg_drv_data *prv_data = host->dev->platform_data; |
| 341 | char fwrev[ATA_ID_FW_REV_LEN + 1]; |
| 342 | char model[ATA_ID_PROD_LEN + 1]; |
| 343 | char serial[ATA_ID_SERNO_LEN + 1]; |
| 344 | |
| 345 | if (!prv_data->use_polling) |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 346 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 347 | |
| 348 | outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 349 | err = mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_RD_DRQ); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 350 | if (err) |
| 351 | return err; |
| 352 | |
| 353 | for (i = 0; i < (MG_SECTOR_SIZE >> 1); i++) |
| 354 | host->id[i] = le16_to_cpu(inw((unsigned long)host->dev_base + |
| 355 | MG_BUFF_OFFSET + i * 2)); |
| 356 | |
| 357 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); |
| 358 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD); |
| 359 | if (err) |
| 360 | return err; |
| 361 | |
| 362 | if ((id[ATA_ID_FIELD_VALID] & 1) == 0) |
| 363 | return MG_ERR_TRANSLATION; |
| 364 | |
| 365 | host->n_sectors = ata_id_u32(id, ATA_ID_LBA_CAPACITY); |
| 366 | host->cyls = id[ATA_ID_CYLS]; |
| 367 | host->heads = id[ATA_ID_HEADS]; |
| 368 | host->sectors = id[ATA_ID_SECTORS]; |
| 369 | |
| 370 | if (MG_RES_SEC && host->heads && host->sectors) { |
| 371 | /* modify cyls, n_sectors */ |
| 372 | host->cyls = (host->n_sectors - MG_RES_SEC) / |
| 373 | host->heads / host->sectors; |
| 374 | host->nres_sectors = host->n_sectors - host->cyls * |
| 375 | host->heads * host->sectors; |
| 376 | host->n_sectors -= host->nres_sectors; |
| 377 | } |
| 378 | |
Bartlomiej Zolnierkiewicz | 8a11a78 | 2009-04-28 13:06:16 +0900 | [diff] [blame] | 379 | mg_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev)); |
| 380 | mg_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); |
| 381 | mg_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial)); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 382 | printk(KERN_INFO "mg_disk: model: %s\n", model); |
| 383 | printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev); |
| 384 | printk(KERN_INFO "mg_disk: serial: %s\n", serial); |
| 385 | printk(KERN_INFO "mg_disk: %d + reserved %d sectors\n", |
| 386 | host->n_sectors, host->nres_sectors); |
| 387 | |
| 388 | if (!prv_data->use_polling) |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 389 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 390 | |
| 391 | return err; |
| 392 | } |
| 393 | |
| 394 | |
| 395 | static int mg_disk_init(struct mg_host *host) |
| 396 | { |
| 397 | struct mg_drv_data *prv_data = host->dev->platform_data; |
| 398 | s32 err; |
| 399 | u8 init_status; |
| 400 | |
| 401 | /* hdd rst low */ |
| 402 | gpio_set_value(host->rst, 0); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 403 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 404 | if (err) |
| 405 | return err; |
| 406 | |
| 407 | /* hdd rst high */ |
| 408 | gpio_set_value(host->rst, 1); |
| 409 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_HDRST_TO_RDY); |
| 410 | if (err) |
| 411 | return err; |
| 412 | |
| 413 | /* soft reset on */ |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 414 | outb(ATA_SRST | (prv_data->use_polling ? ATA_NIEN : 0), |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 415 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 416 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 417 | if (err) |
| 418 | return err; |
| 419 | |
| 420 | /* soft reset off */ |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 421 | outb(prv_data->use_polling ? ATA_NIEN : 0, |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 422 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
| 423 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY); |
| 424 | if (err) |
| 425 | return err; |
| 426 | |
| 427 | init_status = inb((unsigned long)host->dev_base + MG_REG_STATUS) & 0xf; |
| 428 | |
| 429 | if (init_status == 0xf) |
| 430 | return MG_ERR_INIT_STAT; |
| 431 | |
| 432 | return err; |
| 433 | } |
| 434 | |
| 435 | static void mg_bad_rw_intr(struct mg_host *host) |
| 436 | { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 437 | if (host->req) |
| 438 | if (++host->req->errors >= MG_MAX_ERRORS || |
| 439 | host->error == MG_ERR_TIMEOUT) |
| 440 | mg_end_request_cur(host, -EIO); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | static unsigned int mg_out(struct mg_host *host, |
| 444 | unsigned int sect_num, |
| 445 | unsigned int sect_cnt, |
| 446 | unsigned int cmd, |
| 447 | void (*intr_addr)(struct mg_host *)) |
| 448 | { |
| 449 | struct mg_drv_data *prv_data = host->dev->platform_data; |
| 450 | |
| 451 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) |
| 452 | return host->error; |
| 453 | |
| 454 | if (!prv_data->use_polling) { |
| 455 | host->mg_do_intr = intr_addr; |
| 456 | mod_timer(&host->timer, jiffies + 3 * HZ); |
| 457 | } |
| 458 | if (MG_RES_SEC) |
| 459 | sect_num += MG_RES_SEC; |
| 460 | outb((u8)sect_cnt, (unsigned long)host->dev_base + MG_REG_SECT_CNT); |
| 461 | outb((u8)sect_num, (unsigned long)host->dev_base + MG_REG_SECT_NUM); |
| 462 | outb((u8)(sect_num >> 8), (unsigned long)host->dev_base + |
| 463 | MG_REG_CYL_LOW); |
| 464 | outb((u8)(sect_num >> 16), (unsigned long)host->dev_base + |
| 465 | MG_REG_CYL_HIGH); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 466 | outb((u8)((sect_num >> 24) | ATA_LBA | ATA_DEVICE_OBS), |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 467 | (unsigned long)host->dev_base + MG_REG_DRV_HEAD); |
| 468 | outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND); |
| 469 | return MG_ERR_NONE; |
| 470 | } |
| 471 | |
| 472 | static void mg_read(struct request *req) |
| 473 | { |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 474 | u32 j; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 475 | struct mg_host *host = req->rq_disk->private_data; |
| 476 | |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 477 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
| 478 | MG_CMD_RD, NULL) != MG_ERR_NONE) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 479 | mg_bad_rw_intr(host); |
| 480 | |
| 481 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 482 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 483 | |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 484 | do { |
| 485 | u16 *buff = (u16 *)req->buffer; |
| 486 | |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 487 | if (mg_wait(host, ATA_DRQ, |
| 488 | MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) { |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 489 | mg_bad_rw_intr(host); |
| 490 | return; |
| 491 | } |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 492 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
| 493 | *buff++ = inw((unsigned long)host->dev_base + |
| 494 | MG_BUFF_OFFSET + (j << 1)); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 495 | |
| 496 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + |
| 497 | MG_REG_COMMAND); |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 498 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | static void mg_write(struct request *req) |
| 502 | { |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 503 | u32 j; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 504 | struct mg_host *host = req->rq_disk->private_data; |
| 505 | |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 506 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
| 507 | MG_CMD_WR, NULL) != MG_ERR_NONE) { |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 508 | mg_bad_rw_intr(host); |
| 509 | return; |
| 510 | } |
| 511 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 512 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 513 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 514 | |
| 515 | do { |
| 516 | u16 *buff = (u16 *)req->buffer; |
| 517 | |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 518 | if (mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) { |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 519 | mg_bad_rw_intr(host); |
| 520 | return; |
| 521 | } |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 522 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
| 523 | outw(*buff++, (unsigned long)host->dev_base + |
| 524 | MG_BUFF_OFFSET + (j << 1)); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 525 | |
| 526 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + |
| 527 | MG_REG_COMMAND); |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 528 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | static void mg_read_intr(struct mg_host *host) |
| 532 | { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 533 | struct request *req = host->req; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 534 | u32 i; |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 535 | u16 *buff; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 536 | |
| 537 | /* check status */ |
| 538 | do { |
| 539 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 540 | if (i & ATA_BUSY) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 541 | break; |
| 542 | if (!MG_READY_OK(i)) |
| 543 | break; |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 544 | if (i & ATA_DRQ) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 545 | goto ok_to_read; |
| 546 | } while (0); |
| 547 | mg_dump_status("mg_read_intr", i, host); |
| 548 | mg_bad_rw_intr(host); |
| 549 | mg_request(host->breq); |
| 550 | return; |
| 551 | |
| 552 | ok_to_read: |
| 553 | /* get current segment of request */ |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 554 | buff = (u16 *)req->buffer; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 555 | |
| 556 | /* read 1 sector */ |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 557 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) |
| 558 | *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET + |
| 559 | (i << 1)); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 560 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 561 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 562 | blk_rq_pos(req), blk_rq_sectors(req) - 1, req->buffer); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 563 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 564 | /* send read confirm */ |
| 565 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); |
| 566 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 567 | if (mg_end_request(host, 0, MG_SECTOR_SIZE)) { |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 568 | /* set handler if read remains */ |
| 569 | host->mg_do_intr = mg_read_intr; |
| 570 | mod_timer(&host->timer, jiffies + 3 * HZ); |
| 571 | } else /* goto next request */ |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 572 | mg_request(host->breq); |
| 573 | } |
| 574 | |
| 575 | static void mg_write_intr(struct mg_host *host) |
| 576 | { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 577 | struct request *req = host->req; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 578 | u32 i, j; |
| 579 | u16 *buff; |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 580 | bool rem; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 581 | |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 582 | /* check status */ |
| 583 | do { |
| 584 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 585 | if (i & ATA_BUSY) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 586 | break; |
| 587 | if (!MG_READY_OK(i)) |
| 588 | break; |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 589 | if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ)) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 590 | goto ok_to_write; |
| 591 | } while (0); |
| 592 | mg_dump_status("mg_write_intr", i, host); |
| 593 | mg_bad_rw_intr(host); |
| 594 | mg_request(host->breq); |
| 595 | return; |
| 596 | |
| 597 | ok_to_write: |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 598 | if ((rem = mg_end_request(host, 0, MG_SECTOR_SIZE))) { |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 599 | /* write 1 sector and set handler if remains */ |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 600 | buff = (u16 *)req->buffer; |
| 601 | for (j = 0; j < MG_STORAGE_BUFFER_SIZE >> 1; j++) { |
| 602 | outw(*buff, (unsigned long)host->dev_base + |
| 603 | MG_BUFF_OFFSET + (j << 1)); |
| 604 | buff++; |
| 605 | } |
| 606 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 607 | blk_rq_pos(req), blk_rq_sectors(req), req->buffer); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 608 | host->mg_do_intr = mg_write_intr; |
| 609 | mod_timer(&host->timer, jiffies + 3 * HZ); |
| 610 | } |
| 611 | |
| 612 | /* send write confirm */ |
| 613 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); |
| 614 | |
Tejun Heo | a03bb5a | 2009-04-28 13:06:15 +0900 | [diff] [blame] | 615 | if (!rem) |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 616 | mg_request(host->breq); |
| 617 | } |
| 618 | |
| 619 | void mg_times_out(unsigned long data) |
| 620 | { |
| 621 | struct mg_host *host = (struct mg_host *)data; |
| 622 | char *name; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 623 | |
Tejun Heo | ac2ff94 | 2009-04-28 12:38:32 +0900 | [diff] [blame] | 624 | spin_lock_irq(&host->lock); |
| 625 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 626 | if (!host->req) |
Tejun Heo | ac2ff94 | 2009-04-28 12:38:32 +0900 | [diff] [blame] | 627 | goto out_unlock; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 628 | |
| 629 | host->mg_do_intr = NULL; |
| 630 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 631 | name = host->req->rq_disk->disk_name; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 632 | printk(KERN_DEBUG "%s: timeout\n", name); |
| 633 | |
| 634 | host->error = MG_ERR_TIMEOUT; |
| 635 | mg_bad_rw_intr(host); |
| 636 | |
Tejun Heo | ac2ff94 | 2009-04-28 12:38:32 +0900 | [diff] [blame] | 637 | out_unlock: |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 638 | mg_request(host->breq); |
Tejun Heo | ac2ff94 | 2009-04-28 12:38:32 +0900 | [diff] [blame] | 639 | spin_unlock_irq(&host->lock); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | static void mg_request_poll(struct request_queue *q) |
| 643 | { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 644 | struct mg_host *host = q->queuedata; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 645 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 646 | while (1) { |
| 647 | if (!host->req) { |
Tejun Heo | 9934c8c | 2009-05-08 11:54:16 +0900 | [diff] [blame] | 648 | host->req = blk_fetch_request(q); |
| 649 | if (!host->req) |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 650 | break; |
| 651 | } |
Tejun Heo | 9a8d23d | 2009-05-08 11:54:00 +0900 | [diff] [blame] | 652 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 653 | if (unlikely(!blk_fs_request(host->req))) { |
| 654 | mg_end_request_cur(host, -EIO); |
Tejun Heo | 9a8d23d | 2009-05-08 11:54:00 +0900 | [diff] [blame] | 655 | continue; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 656 | } |
Tejun Heo | 9a8d23d | 2009-05-08 11:54:00 +0900 | [diff] [blame] | 657 | |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 658 | if (rq_data_dir(host->req) == READ) |
| 659 | mg_read(host->req); |
Tejun Heo | 9a8d23d | 2009-05-08 11:54:00 +0900 | [diff] [blame] | 660 | else |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 661 | mg_write(host->req); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 662 | } |
| 663 | } |
| 664 | |
| 665 | static unsigned int mg_issue_req(struct request *req, |
| 666 | struct mg_host *host, |
| 667 | unsigned int sect_num, |
| 668 | unsigned int sect_cnt) |
| 669 | { |
| 670 | u16 *buff; |
| 671 | u32 i; |
| 672 | |
| 673 | switch (rq_data_dir(req)) { |
| 674 | case READ: |
| 675 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr) |
| 676 | != MG_ERR_NONE) { |
| 677 | mg_bad_rw_intr(host); |
| 678 | return host->error; |
| 679 | } |
| 680 | break; |
| 681 | case WRITE: |
| 682 | /* TODO : handler */ |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 683 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 684 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr) |
| 685 | != MG_ERR_NONE) { |
| 686 | mg_bad_rw_intr(host); |
| 687 | return host->error; |
| 688 | } |
| 689 | del_timer(&host->timer); |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 690 | mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ); |
| 691 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 692 | if (host->error) { |
| 693 | mg_bad_rw_intr(host); |
| 694 | return host->error; |
| 695 | } |
| 696 | buff = (u16 *)req->buffer; |
| 697 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) { |
| 698 | outw(*buff, (unsigned long)host->dev_base + |
| 699 | MG_BUFF_OFFSET + (i << 1)); |
| 700 | buff++; |
| 701 | } |
| 702 | mod_timer(&host->timer, jiffies + 3 * HZ); |
| 703 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + |
| 704 | MG_REG_COMMAND); |
| 705 | break; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 706 | } |
| 707 | return MG_ERR_NONE; |
| 708 | } |
| 709 | |
| 710 | /* This function also called from IRQ context */ |
| 711 | static void mg_request(struct request_queue *q) |
| 712 | { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 713 | struct mg_host *host = q->queuedata; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 714 | struct request *req; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 715 | u32 sect_num, sect_cnt; |
| 716 | |
| 717 | while (1) { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 718 | if (!host->req) { |
Tejun Heo | 9934c8c | 2009-05-08 11:54:16 +0900 | [diff] [blame] | 719 | host->req = blk_fetch_request(q); |
| 720 | if (!host->req) |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 721 | break; |
| 722 | } |
| 723 | req = host->req; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 724 | |
| 725 | /* check unwanted request call */ |
| 726 | if (host->mg_do_intr) |
| 727 | return; |
| 728 | |
| 729 | del_timer(&host->timer); |
| 730 | |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 731 | sect_num = blk_rq_pos(req); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 732 | /* deal whole segments */ |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 733 | sect_cnt = blk_rq_sectors(req); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 734 | |
| 735 | /* sanity check */ |
| 736 | if (sect_num >= get_capacity(req->rq_disk) || |
| 737 | ((sect_num + sect_cnt) > |
| 738 | get_capacity(req->rq_disk))) { |
| 739 | printk(KERN_WARNING |
| 740 | "%s: bad access: sector=%d, count=%d\n", |
| 741 | req->rq_disk->disk_name, |
| 742 | sect_num, sect_cnt); |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 743 | mg_end_request_cur(host, -EIO); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 744 | continue; |
| 745 | } |
| 746 | |
Tejun Heo | 9a8d23d | 2009-05-08 11:54:00 +0900 | [diff] [blame] | 747 | if (unlikely(!blk_fs_request(req))) { |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 748 | mg_end_request_cur(host, -EIO); |
Tejun Heo | 9a8d23d | 2009-05-08 11:54:00 +0900 | [diff] [blame] | 749 | continue; |
| 750 | } |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 751 | |
| 752 | if (!mg_issue_req(req, host, sect_num, sect_cnt)) |
| 753 | return; |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| 758 | { |
| 759 | struct mg_host *host = bdev->bd_disk->private_data; |
| 760 | |
| 761 | geo->cylinders = (unsigned short)host->cyls; |
| 762 | geo->heads = (unsigned char)host->heads; |
| 763 | geo->sectors = (unsigned char)host->sectors; |
| 764 | return 0; |
| 765 | } |
| 766 | |
| 767 | static struct block_device_operations mg_disk_ops = { |
| 768 | .getgeo = mg_getgeo |
| 769 | }; |
| 770 | |
| 771 | static int mg_suspend(struct platform_device *plat_dev, pm_message_t state) |
| 772 | { |
| 773 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; |
| 774 | struct mg_host *host = prv_data->host; |
| 775 | |
| 776 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) |
| 777 | return -EIO; |
| 778 | |
| 779 | if (!prv_data->use_polling) |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 780 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 781 | |
| 782 | outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND); |
| 783 | /* wait until mflash deep sleep */ |
| 784 | msleep(1); |
| 785 | |
| 786 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) { |
| 787 | if (!prv_data->use_polling) |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 788 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 789 | return -EIO; |
| 790 | } |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | static int mg_resume(struct platform_device *plat_dev) |
| 796 | { |
| 797 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; |
| 798 | struct mg_host *host = prv_data->host; |
| 799 | |
| 800 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) |
| 801 | return -EIO; |
| 802 | |
| 803 | outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND); |
| 804 | /* wait until mflash wakeup */ |
| 805 | msleep(1); |
| 806 | |
| 807 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) |
| 808 | return -EIO; |
| 809 | |
| 810 | if (!prv_data->use_polling) |
Bartlomiej Zolnierkiewicz | f68adec | 2009-04-28 13:06:17 +0900 | [diff] [blame] | 811 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 812 | |
| 813 | return 0; |
| 814 | } |
| 815 | |
| 816 | static int mg_probe(struct platform_device *plat_dev) |
| 817 | { |
| 818 | struct mg_host *host; |
| 819 | struct resource *rsc; |
| 820 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; |
| 821 | int err = 0; |
| 822 | |
| 823 | if (!prv_data) { |
| 824 | printk(KERN_ERR "%s:%d fail (no driver_data)\n", |
| 825 | __func__, __LINE__); |
| 826 | err = -EINVAL; |
| 827 | goto probe_err; |
| 828 | } |
| 829 | |
| 830 | /* alloc mg_host */ |
| 831 | host = kzalloc(sizeof(struct mg_host), GFP_KERNEL); |
| 832 | if (!host) { |
| 833 | printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n", |
| 834 | __func__, __LINE__); |
| 835 | err = -ENOMEM; |
| 836 | goto probe_err; |
| 837 | } |
| 838 | host->major = MG_DISK_MAJ; |
| 839 | |
| 840 | /* link each other */ |
| 841 | prv_data->host = host; |
| 842 | host->dev = &plat_dev->dev; |
| 843 | |
| 844 | /* io remap */ |
| 845 | rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0); |
| 846 | if (!rsc) { |
| 847 | printk(KERN_ERR "%s:%d platform_get_resource fail\n", |
| 848 | __func__, __LINE__); |
| 849 | err = -EINVAL; |
| 850 | goto probe_err_2; |
| 851 | } |
| 852 | host->dev_base = ioremap(rsc->start , rsc->end + 1); |
| 853 | if (!host->dev_base) { |
| 854 | printk(KERN_ERR "%s:%d ioremap fail\n", |
| 855 | __func__, __LINE__); |
| 856 | err = -EIO; |
| 857 | goto probe_err_2; |
| 858 | } |
| 859 | MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base); |
| 860 | |
| 861 | /* get reset pin */ |
| 862 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, |
| 863 | MG_RST_PIN); |
| 864 | if (!rsc) { |
| 865 | printk(KERN_ERR "%s:%d get reset pin fail\n", |
| 866 | __func__, __LINE__); |
| 867 | err = -EIO; |
| 868 | goto probe_err_3; |
| 869 | } |
| 870 | host->rst = rsc->start; |
| 871 | |
| 872 | /* init rst pin */ |
| 873 | err = gpio_request(host->rst, MG_RST_PIN); |
| 874 | if (err) |
| 875 | goto probe_err_3; |
| 876 | gpio_direction_output(host->rst, 1); |
| 877 | |
| 878 | /* reset out pin */ |
| 879 | if (!(prv_data->dev_attr & MG_DEV_MASK)) |
| 880 | goto probe_err_3a; |
| 881 | |
| 882 | if (prv_data->dev_attr != MG_BOOT_DEV) { |
| 883 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, |
| 884 | MG_RSTOUT_PIN); |
| 885 | if (!rsc) { |
| 886 | printk(KERN_ERR "%s:%d get reset-out pin fail\n", |
| 887 | __func__, __LINE__); |
| 888 | err = -EIO; |
| 889 | goto probe_err_3a; |
| 890 | } |
| 891 | host->rstout = rsc->start; |
| 892 | err = gpio_request(host->rstout, MG_RSTOUT_PIN); |
| 893 | if (err) |
| 894 | goto probe_err_3a; |
| 895 | gpio_direction_input(host->rstout); |
| 896 | } |
| 897 | |
| 898 | /* disk reset */ |
| 899 | if (prv_data->dev_attr == MG_STORAGE_DEV) { |
| 900 | /* If POR seq. not yet finised, wait */ |
| 901 | err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT); |
| 902 | if (err) |
| 903 | goto probe_err_3b; |
| 904 | err = mg_disk_init(host); |
| 905 | if (err) { |
| 906 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", |
| 907 | __func__, __LINE__, err); |
| 908 | err = -EIO; |
| 909 | goto probe_err_3b; |
| 910 | } |
| 911 | } |
| 912 | |
| 913 | /* get irq resource */ |
| 914 | if (!prv_data->use_polling) { |
| 915 | host->irq = platform_get_irq(plat_dev, 0); |
| 916 | if (host->irq == -ENXIO) { |
| 917 | err = host->irq; |
| 918 | goto probe_err_3b; |
| 919 | } |
| 920 | err = request_irq(host->irq, mg_irq, |
| 921 | IRQF_DISABLED | IRQF_TRIGGER_RISING, |
| 922 | MG_DEV_NAME, host); |
| 923 | if (err) { |
| 924 | printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n", |
| 925 | __func__, __LINE__, err); |
| 926 | goto probe_err_3b; |
| 927 | } |
| 928 | |
| 929 | } |
| 930 | |
| 931 | /* get disk id */ |
| 932 | err = mg_get_disk_id(host); |
| 933 | if (err) { |
| 934 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", |
| 935 | __func__, __LINE__, err); |
| 936 | err = -EIO; |
| 937 | goto probe_err_4; |
| 938 | } |
| 939 | |
| 940 | err = register_blkdev(host->major, MG_DISK_NAME); |
| 941 | if (err < 0) { |
| 942 | printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n", |
| 943 | __func__, __LINE__, err); |
| 944 | goto probe_err_4; |
| 945 | } |
| 946 | if (!host->major) |
| 947 | host->major = err; |
| 948 | |
| 949 | spin_lock_init(&host->lock); |
| 950 | |
| 951 | if (prv_data->use_polling) |
| 952 | host->breq = blk_init_queue(mg_request_poll, &host->lock); |
| 953 | else |
| 954 | host->breq = blk_init_queue(mg_request, &host->lock); |
| 955 | |
| 956 | if (!host->breq) { |
| 957 | err = -ENOMEM; |
| 958 | printk(KERN_ERR "%s:%d (blk_init_queue) fail\n", |
| 959 | __func__, __LINE__); |
| 960 | goto probe_err_5; |
| 961 | } |
Tejun Heo | 5b36ad6 | 2009-05-08 11:54:01 +0900 | [diff] [blame] | 962 | host->breq->queuedata = host; |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 963 | |
| 964 | /* mflash is random device, thanx for the noop */ |
| 965 | elevator_exit(host->breq->elevator); |
| 966 | err = elevator_init(host->breq, "noop"); |
| 967 | if (err) { |
| 968 | printk(KERN_ERR "%s:%d (elevator_init) fail\n", |
| 969 | __func__, __LINE__); |
| 970 | goto probe_err_6; |
| 971 | } |
| 972 | blk_queue_max_sectors(host->breq, MG_MAX_SECTS); |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 973 | blk_queue_logical_block_size(host->breq, MG_SECTOR_SIZE); |
unsik Kim | 3fbed4c | 2009-04-02 12:50:58 -0700 | [diff] [blame] | 974 | |
| 975 | init_timer(&host->timer); |
| 976 | host->timer.function = mg_times_out; |
| 977 | host->timer.data = (unsigned long)host; |
| 978 | |
| 979 | host->gd = alloc_disk(MG_DISK_MAX_PART); |
| 980 | if (!host->gd) { |
| 981 | printk(KERN_ERR "%s:%d (alloc_disk) fail\n", |
| 982 | __func__, __LINE__); |
| 983 | err = -ENOMEM; |
| 984 | goto probe_err_7; |
| 985 | } |
| 986 | host->gd->major = host->major; |
| 987 | host->gd->first_minor = 0; |
| 988 | host->gd->fops = &mg_disk_ops; |
| 989 | host->gd->queue = host->breq; |
| 990 | host->gd->private_data = host; |
| 991 | sprintf(host->gd->disk_name, MG_DISK_NAME"a"); |
| 992 | |
| 993 | set_capacity(host->gd, host->n_sectors); |
| 994 | |
| 995 | add_disk(host->gd); |
| 996 | |
| 997 | return err; |
| 998 | |
| 999 | probe_err_7: |
| 1000 | del_timer_sync(&host->timer); |
| 1001 | probe_err_6: |
| 1002 | blk_cleanup_queue(host->breq); |
| 1003 | probe_err_5: |
| 1004 | unregister_blkdev(MG_DISK_MAJ, MG_DISK_NAME); |
| 1005 | probe_err_4: |
| 1006 | if (!prv_data->use_polling) |
| 1007 | free_irq(host->irq, host); |
| 1008 | probe_err_3b: |
| 1009 | gpio_free(host->rstout); |
| 1010 | probe_err_3a: |
| 1011 | gpio_free(host->rst); |
| 1012 | probe_err_3: |
| 1013 | iounmap(host->dev_base); |
| 1014 | probe_err_2: |
| 1015 | kfree(host); |
| 1016 | probe_err: |
| 1017 | return err; |
| 1018 | } |
| 1019 | |
| 1020 | static int mg_remove(struct platform_device *plat_dev) |
| 1021 | { |
| 1022 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; |
| 1023 | struct mg_host *host = prv_data->host; |
| 1024 | int err = 0; |
| 1025 | |
| 1026 | /* delete timer */ |
| 1027 | del_timer_sync(&host->timer); |
| 1028 | |
| 1029 | /* remove disk */ |
| 1030 | if (host->gd) { |
| 1031 | del_gendisk(host->gd); |
| 1032 | put_disk(host->gd); |
| 1033 | } |
| 1034 | /* remove queue */ |
| 1035 | if (host->breq) |
| 1036 | blk_cleanup_queue(host->breq); |
| 1037 | |
| 1038 | /* unregister blk device */ |
| 1039 | unregister_blkdev(host->major, MG_DISK_NAME); |
| 1040 | |
| 1041 | /* free irq */ |
| 1042 | if (!prv_data->use_polling) |
| 1043 | free_irq(host->irq, host); |
| 1044 | |
| 1045 | /* free reset-out pin */ |
| 1046 | if (prv_data->dev_attr != MG_BOOT_DEV) |
| 1047 | gpio_free(host->rstout); |
| 1048 | |
| 1049 | /* free rst pin */ |
| 1050 | if (host->rst) |
| 1051 | gpio_free(host->rst); |
| 1052 | |
| 1053 | /* unmap io */ |
| 1054 | if (host->dev_base) |
| 1055 | iounmap(host->dev_base); |
| 1056 | |
| 1057 | /* free mg_host */ |
| 1058 | kfree(host); |
| 1059 | |
| 1060 | return err; |
| 1061 | } |
| 1062 | |
| 1063 | static struct platform_driver mg_disk_driver = { |
| 1064 | .probe = mg_probe, |
| 1065 | .remove = mg_remove, |
| 1066 | .suspend = mg_suspend, |
| 1067 | .resume = mg_resume, |
| 1068 | .driver = { |
| 1069 | .name = MG_DEV_NAME, |
| 1070 | .owner = THIS_MODULE, |
| 1071 | } |
| 1072 | }; |
| 1073 | |
| 1074 | /**************************************************************************** |
| 1075 | * |
| 1076 | * Module stuff |
| 1077 | * |
| 1078 | ****************************************************************************/ |
| 1079 | |
| 1080 | static int __init mg_init(void) |
| 1081 | { |
| 1082 | printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n"); |
| 1083 | return platform_driver_register(&mg_disk_driver); |
| 1084 | } |
| 1085 | |
| 1086 | static void __exit mg_exit(void) |
| 1087 | { |
| 1088 | printk(KERN_INFO "mflash driver : bye bye\n"); |
| 1089 | platform_driver_unregister(&mg_disk_driver); |
| 1090 | } |
| 1091 | |
| 1092 | module_init(mg_init); |
| 1093 | module_exit(mg_exit); |
| 1094 | |
| 1095 | MODULE_LICENSE("GPL"); |
| 1096 | MODULE_AUTHOR("unsik Kim <donari75@gmail.com>"); |
| 1097 | MODULE_DESCRIPTION("mGine m[g]flash device driver"); |