Commit | Line | Data |
---|---|---|
3fbed4c6 K |
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> | |
8a11a789 | 20 | #include <linux/ata.h> |
3fbed4c6 K |
21 | #include <linux/interrupt.h> |
22 | #include <linux/delay.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/gpio.h> | |
3fbed4c6 K |
25 | |
26 | #define MG_RES_SEC (CONFIG_MG_DISK_RES << 1) | |
27 | ||
eec94620 TH |
28 | /* name for block device */ |
29 | #define MG_DISK_NAME "mgd" | |
30 | /* name for platform device */ | |
31 | #define MG_DEV_NAME "mg_disk" | |
32 | ||
33 | #define MG_DISK_MAJ 0 | |
34 | #define MG_DISK_MAX_PART 16 | |
35 | #define MG_SECTOR_SIZE 512 | |
36 | #define MG_MAX_SECTS 256 | |
37 | ||
38 | /* Register offsets */ | |
39 | #define MG_BUFF_OFFSET 0x8000 | |
40 | #define MG_STORAGE_BUFFER_SIZE 0x200 | |
41 | #define MG_REG_OFFSET 0xC000 | |
42 | #define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */ | |
43 | #define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */ | |
44 | #define MG_REG_SECT_CNT (MG_REG_OFFSET + 4) | |
45 | #define MG_REG_SECT_NUM (MG_REG_OFFSET + 6) | |
46 | #define MG_REG_CYL_LOW (MG_REG_OFFSET + 8) | |
47 | #define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA) | |
48 | #define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC) | |
49 | #define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */ | |
50 | #define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */ | |
51 | #define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10) | |
52 | #define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12) | |
53 | ||
eec94620 | 54 | /* handy status */ |
f68adec3 BZ |
55 | #define MG_STAT_READY (ATA_DRDY | ATA_DSC) |
56 | #define MG_READY_OK(s) (((s) & (MG_STAT_READY | (ATA_BUSY | ATA_DF | \ | |
57 | ATA_ERR))) == MG_STAT_READY) | |
eec94620 TH |
58 | |
59 | /* error code for others */ | |
60 | #define MG_ERR_NONE 0 | |
61 | #define MG_ERR_TIMEOUT 0x100 | |
62 | #define MG_ERR_INIT_STAT 0x101 | |
63 | #define MG_ERR_TRANSLATION 0x102 | |
64 | #define MG_ERR_CTRL_RST 0x103 | |
65 | #define MG_ERR_INV_STAT 0x104 | |
66 | #define MG_ERR_RSTOUT 0x105 | |
67 | ||
68 | #define MG_MAX_ERRORS 6 /* Max read/write errors */ | |
69 | ||
70 | /* command */ | |
71 | #define MG_CMD_RD 0x20 | |
72 | #define MG_CMD_WR 0x30 | |
73 | #define MG_CMD_SLEEP 0x99 | |
74 | #define MG_CMD_WAKEUP 0xC3 | |
75 | #define MG_CMD_ID 0xEC | |
76 | #define MG_CMD_WR_CONF 0x3C | |
77 | #define MG_CMD_RD_CONF 0x40 | |
78 | ||
79 | /* operation mode */ | |
80 | #define MG_OP_CASCADE (1 << 0) | |
81 | #define MG_OP_CASCADE_SYNC_RD (1 << 1) | |
82 | #define MG_OP_CASCADE_SYNC_WR (1 << 2) | |
83 | #define MG_OP_INTERLEAVE (1 << 3) | |
84 | ||
85 | /* synchronous */ | |
86 | #define MG_BURST_LAT_4 (3 << 4) | |
87 | #define MG_BURST_LAT_5 (4 << 4) | |
88 | #define MG_BURST_LAT_6 (5 << 4) | |
89 | #define MG_BURST_LAT_7 (6 << 4) | |
90 | #define MG_BURST_LAT_8 (7 << 4) | |
91 | #define MG_BURST_LEN_4 (1 << 1) | |
92 | #define MG_BURST_LEN_8 (2 << 1) | |
93 | #define MG_BURST_LEN_16 (3 << 1) | |
94 | #define MG_BURST_LEN_32 (4 << 1) | |
95 | #define MG_BURST_LEN_CONT (0 << 1) | |
96 | ||
97 | /* timeout value (unit: ms) */ | |
98 | #define MG_TMAX_CONF_TO_CMD 1 | |
99 | #define MG_TMAX_WAIT_RD_DRQ 10 | |
100 | #define MG_TMAX_WAIT_WR_DRQ 500 | |
101 | #define MG_TMAX_RST_TO_BUSY 10 | |
102 | #define MG_TMAX_HDRST_TO_RDY 500 | |
103 | #define MG_TMAX_SWRST_TO_RDY 500 | |
104 | #define MG_TMAX_RSTOUT 3000 | |
105 | ||
106 | /* device attribution */ | |
107 | /* use mflash as boot device */ | |
108 | #define MG_BOOT_DEV (1 << 0) | |
109 | /* use mflash as storage device */ | |
110 | #define MG_STORAGE_DEV (1 << 1) | |
111 | /* same as MG_STORAGE_DEV, but bootloader already done reset sequence */ | |
112 | #define MG_STORAGE_DEV_SKIP_RST (1 << 2) | |
113 | ||
114 | #define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST) | |
115 | ||
116 | /* names of GPIO resource */ | |
117 | #define MG_RST_PIN "mg_rst" | |
118 | /* except MG_BOOT_DEV, reset-out pin should be assigned */ | |
119 | #define MG_RSTOUT_PIN "mg_rstout" | |
120 | ||
121 | /* private driver data */ | |
122 | struct mg_drv_data { | |
123 | /* disk resource */ | |
124 | u32 use_polling; | |
125 | ||
126 | /* device attribution */ | |
127 | u32 dev_attr; | |
128 | ||
129 | /* internally used */ | |
130 | struct mg_host *host; | |
131 | }; | |
132 | ||
133 | /* main structure for mflash driver */ | |
134 | struct mg_host { | |
135 | struct device *dev; | |
136 | ||
137 | struct request_queue *breq; | |
138 | spinlock_t lock; | |
139 | struct gendisk *gd; | |
140 | ||
141 | struct timer_list timer; | |
142 | void (*mg_do_intr) (struct mg_host *); | |
143 | ||
144 | u16 id[ATA_ID_WORDS]; | |
145 | ||
146 | u16 cyls; | |
147 | u16 heads; | |
148 | u16 sectors; | |
149 | u32 n_sectors; | |
150 | u32 nres_sectors; | |
151 | ||
152 | void __iomem *dev_base; | |
153 | unsigned int irq; | |
154 | unsigned int rst; | |
155 | unsigned int rstout; | |
156 | ||
157 | u32 major; | |
158 | u32 error; | |
159 | }; | |
160 | ||
161 | /* | |
162 | * Debugging macro and defines | |
163 | */ | |
164 | #undef DO_MG_DEBUG | |
165 | #ifdef DO_MG_DEBUG | |
166 | # define MG_DBG(fmt, args...) \ | |
167 | printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args) | |
168 | #else /* CONFIG_MG_DEBUG */ | |
169 | # define MG_DBG(fmt, args...) do { } while (0) | |
170 | #endif /* CONFIG_MG_DEBUG */ | |
171 | ||
3fbed4c6 K |
172 | static void mg_request(struct request_queue *); |
173 | ||
174 | static void mg_dump_status(const char *msg, unsigned int stat, | |
175 | struct mg_host *host) | |
176 | { | |
177 | char *name = MG_DISK_NAME; | |
178 | struct request *req; | |
179 | ||
180 | if (host->breq) { | |
181 | req = elv_next_request(host->breq); | |
182 | if (req) | |
183 | name = req->rq_disk->disk_name; | |
184 | } | |
185 | ||
186 | printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff); | |
f68adec3 | 187 | if (stat & ATA_BUSY) |
3fbed4c6 | 188 | printk("Busy "); |
f68adec3 | 189 | if (stat & ATA_DRDY) |
3fbed4c6 | 190 | printk("DriveReady "); |
f68adec3 | 191 | if (stat & ATA_DF) |
3fbed4c6 | 192 | printk("WriteFault "); |
f68adec3 | 193 | if (stat & ATA_DSC) |
3fbed4c6 | 194 | printk("SeekComplete "); |
f68adec3 | 195 | if (stat & ATA_DRQ) |
3fbed4c6 | 196 | printk("DataRequest "); |
f68adec3 | 197 | if (stat & ATA_CORR) |
3fbed4c6 | 198 | printk("CorrectedError "); |
f68adec3 | 199 | if (stat & ATA_ERR) |
3fbed4c6 K |
200 | printk("Error "); |
201 | printk("}\n"); | |
f68adec3 | 202 | if ((stat & ATA_ERR) == 0) { |
3fbed4c6 K |
203 | host->error = 0; |
204 | } else { | |
205 | host->error = inb((unsigned long)host->dev_base + MG_REG_ERROR); | |
206 | printk(KERN_ERR "%s: %s: error=0x%02x { ", name, msg, | |
207 | host->error & 0xff); | |
f68adec3 | 208 | if (host->error & ATA_BBK) |
3fbed4c6 | 209 | printk("BadSector "); |
f68adec3 | 210 | if (host->error & ATA_UNC) |
3fbed4c6 | 211 | printk("UncorrectableError "); |
f68adec3 | 212 | if (host->error & ATA_IDNF) |
3fbed4c6 | 213 | printk("SectorIdNotFound "); |
f68adec3 | 214 | if (host->error & ATA_ABORTED) |
3fbed4c6 | 215 | printk("DriveStatusError "); |
f68adec3 | 216 | if (host->error & ATA_AMNF) |
3fbed4c6 K |
217 | printk("AddrMarkNotFound "); |
218 | printk("}"); | |
f68adec3 | 219 | if (host->error & (ATA_BBK | ATA_UNC | ATA_IDNF | ATA_AMNF)) { |
3fbed4c6 K |
220 | if (host->breq) { |
221 | req = elv_next_request(host->breq); | |
222 | if (req) | |
83096ebf TH |
223 | printk(", sector=%u", |
224 | (unsigned int)blk_rq_pos(req)); | |
3fbed4c6 K |
225 | } |
226 | ||
227 | } | |
228 | printk("\n"); | |
229 | } | |
230 | } | |
231 | ||
232 | static unsigned int mg_wait(struct mg_host *host, u32 expect, u32 msec) | |
233 | { | |
234 | u8 status; | |
235 | unsigned long expire, cur_jiffies; | |
236 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
237 | ||
238 | host->error = MG_ERR_NONE; | |
239 | expire = jiffies + msecs_to_jiffies(msec); | |
240 | ||
241 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
242 | ||
243 | do { | |
244 | cur_jiffies = jiffies; | |
f68adec3 BZ |
245 | if (status & ATA_BUSY) { |
246 | if (expect == ATA_BUSY) | |
3fbed4c6 K |
247 | break; |
248 | } else { | |
249 | /* Check the error condition! */ | |
f68adec3 | 250 | if (status & ATA_ERR) { |
3fbed4c6 K |
251 | mg_dump_status("mg_wait", status, host); |
252 | break; | |
253 | } | |
254 | ||
255 | if (expect == MG_STAT_READY) | |
256 | if (MG_READY_OK(status)) | |
257 | break; | |
258 | ||
f68adec3 BZ |
259 | if (expect == ATA_DRQ) |
260 | if (status & ATA_DRQ) | |
3fbed4c6 K |
261 | break; |
262 | } | |
263 | if (!msec) { | |
264 | mg_dump_status("not ready", status, host); | |
265 | return MG_ERR_INV_STAT; | |
266 | } | |
267 | if (prv_data->use_polling) | |
268 | msleep(1); | |
269 | ||
270 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
271 | } while (time_before(cur_jiffies, expire)); | |
272 | ||
273 | if (time_after_eq(cur_jiffies, expire) && msec) | |
274 | host->error = MG_ERR_TIMEOUT; | |
275 | ||
276 | return host->error; | |
277 | } | |
278 | ||
279 | static unsigned int mg_wait_rstout(u32 rstout, u32 msec) | |
280 | { | |
281 | unsigned long expire; | |
282 | ||
283 | expire = jiffies + msecs_to_jiffies(msec); | |
284 | while (time_before(jiffies, expire)) { | |
285 | if (gpio_get_value(rstout) == 1) | |
286 | return MG_ERR_NONE; | |
287 | msleep(10); | |
288 | } | |
289 | ||
290 | return MG_ERR_RSTOUT; | |
291 | } | |
292 | ||
293 | static void mg_unexpected_intr(struct mg_host *host) | |
294 | { | |
295 | u32 status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
296 | ||
297 | mg_dump_status("mg_unexpected_intr", status, host); | |
298 | } | |
299 | ||
300 | static irqreturn_t mg_irq(int irq, void *dev_id) | |
301 | { | |
302 | struct mg_host *host = dev_id; | |
303 | void (*handler)(struct mg_host *) = host->mg_do_intr; | |
304 | ||
ac2ff946 TH |
305 | spin_lock(&host->lock); |
306 | ||
307 | host->mg_do_intr = NULL; | |
3fbed4c6 K |
308 | del_timer(&host->timer); |
309 | if (!handler) | |
310 | handler = mg_unexpected_intr; | |
311 | handler(host); | |
ac2ff946 TH |
312 | |
313 | spin_unlock(&host->lock); | |
314 | ||
3fbed4c6 K |
315 | return IRQ_HANDLED; |
316 | } | |
317 | ||
8a11a789 BZ |
318 | /* local copy of ata_id_string() */ |
319 | static void mg_id_string(const u16 *id, unsigned char *s, | |
320 | unsigned int ofs, unsigned int len) | |
321 | { | |
322 | unsigned int c; | |
323 | ||
324 | BUG_ON(len & 1); | |
325 | ||
326 | while (len > 0) { | |
327 | c = id[ofs] >> 8; | |
328 | *s = c; | |
329 | s++; | |
330 | ||
331 | c = id[ofs] & 0xff; | |
332 | *s = c; | |
333 | s++; | |
334 | ||
335 | ofs++; | |
336 | len -= 2; | |
337 | } | |
338 | } | |
339 | ||
340 | /* local copy of ata_id_c_string() */ | |
341 | static void mg_id_c_string(const u16 *id, unsigned char *s, | |
342 | unsigned int ofs, unsigned int len) | |
343 | { | |
344 | unsigned char *p; | |
345 | ||
346 | mg_id_string(id, s, ofs, len - 1); | |
347 | ||
348 | p = s + strnlen(s, len - 1); | |
349 | while (p > s && p[-1] == ' ') | |
350 | p--; | |
351 | *p = '\0'; | |
352 | } | |
353 | ||
3fbed4c6 K |
354 | static int mg_get_disk_id(struct mg_host *host) |
355 | { | |
356 | u32 i; | |
357 | s32 err; | |
358 | const u16 *id = host->id; | |
359 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
360 | char fwrev[ATA_ID_FW_REV_LEN + 1]; | |
361 | char model[ATA_ID_PROD_LEN + 1]; | |
362 | char serial[ATA_ID_SERNO_LEN + 1]; | |
363 | ||
364 | if (!prv_data->use_polling) | |
f68adec3 | 365 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
366 | |
367 | outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
f68adec3 | 368 | err = mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_RD_DRQ); |
3fbed4c6 K |
369 | if (err) |
370 | return err; | |
371 | ||
372 | for (i = 0; i < (MG_SECTOR_SIZE >> 1); i++) | |
373 | host->id[i] = le16_to_cpu(inw((unsigned long)host->dev_base + | |
374 | MG_BUFF_OFFSET + i * 2)); | |
375 | ||
376 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
377 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD); | |
378 | if (err) | |
379 | return err; | |
380 | ||
381 | if ((id[ATA_ID_FIELD_VALID] & 1) == 0) | |
382 | return MG_ERR_TRANSLATION; | |
383 | ||
384 | host->n_sectors = ata_id_u32(id, ATA_ID_LBA_CAPACITY); | |
385 | host->cyls = id[ATA_ID_CYLS]; | |
386 | host->heads = id[ATA_ID_HEADS]; | |
387 | host->sectors = id[ATA_ID_SECTORS]; | |
388 | ||
389 | if (MG_RES_SEC && host->heads && host->sectors) { | |
390 | /* modify cyls, n_sectors */ | |
391 | host->cyls = (host->n_sectors - MG_RES_SEC) / | |
392 | host->heads / host->sectors; | |
393 | host->nres_sectors = host->n_sectors - host->cyls * | |
394 | host->heads * host->sectors; | |
395 | host->n_sectors -= host->nres_sectors; | |
396 | } | |
397 | ||
8a11a789 BZ |
398 | mg_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev)); |
399 | mg_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); | |
400 | mg_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial)); | |
3fbed4c6 K |
401 | printk(KERN_INFO "mg_disk: model: %s\n", model); |
402 | printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev); | |
403 | printk(KERN_INFO "mg_disk: serial: %s\n", serial); | |
404 | printk(KERN_INFO "mg_disk: %d + reserved %d sectors\n", | |
405 | host->n_sectors, host->nres_sectors); | |
406 | ||
407 | if (!prv_data->use_polling) | |
f68adec3 | 408 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
409 | |
410 | return err; | |
411 | } | |
412 | ||
413 | ||
414 | static int mg_disk_init(struct mg_host *host) | |
415 | { | |
416 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
417 | s32 err; | |
418 | u8 init_status; | |
419 | ||
420 | /* hdd rst low */ | |
421 | gpio_set_value(host->rst, 0); | |
f68adec3 | 422 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
3fbed4c6 K |
423 | if (err) |
424 | return err; | |
425 | ||
426 | /* hdd rst high */ | |
427 | gpio_set_value(host->rst, 1); | |
428 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_HDRST_TO_RDY); | |
429 | if (err) | |
430 | return err; | |
431 | ||
432 | /* soft reset on */ | |
f68adec3 | 433 | outb(ATA_SRST | (prv_data->use_polling ? ATA_NIEN : 0), |
3fbed4c6 | 434 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
f68adec3 | 435 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
3fbed4c6 K |
436 | if (err) |
437 | return err; | |
438 | ||
439 | /* soft reset off */ | |
f68adec3 | 440 | outb(prv_data->use_polling ? ATA_NIEN : 0, |
3fbed4c6 K |
441 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
442 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY); | |
443 | if (err) | |
444 | return err; | |
445 | ||
446 | init_status = inb((unsigned long)host->dev_base + MG_REG_STATUS) & 0xf; | |
447 | ||
448 | if (init_status == 0xf) | |
449 | return MG_ERR_INIT_STAT; | |
450 | ||
451 | return err; | |
452 | } | |
453 | ||
454 | static void mg_bad_rw_intr(struct mg_host *host) | |
455 | { | |
456 | struct request *req = elv_next_request(host->breq); | |
457 | if (req != NULL) | |
458 | if (++req->errors >= MG_MAX_ERRORS || | |
459 | host->error == MG_ERR_TIMEOUT) | |
f06d9a2b | 460 | __blk_end_request_cur(req, -EIO); |
3fbed4c6 K |
461 | } |
462 | ||
463 | static unsigned int mg_out(struct mg_host *host, | |
464 | unsigned int sect_num, | |
465 | unsigned int sect_cnt, | |
466 | unsigned int cmd, | |
467 | void (*intr_addr)(struct mg_host *)) | |
468 | { | |
469 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
470 | ||
471 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
472 | return host->error; | |
473 | ||
474 | if (!prv_data->use_polling) { | |
475 | host->mg_do_intr = intr_addr; | |
476 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
477 | } | |
478 | if (MG_RES_SEC) | |
479 | sect_num += MG_RES_SEC; | |
480 | outb((u8)sect_cnt, (unsigned long)host->dev_base + MG_REG_SECT_CNT); | |
481 | outb((u8)sect_num, (unsigned long)host->dev_base + MG_REG_SECT_NUM); | |
482 | outb((u8)(sect_num >> 8), (unsigned long)host->dev_base + | |
483 | MG_REG_CYL_LOW); | |
484 | outb((u8)(sect_num >> 16), (unsigned long)host->dev_base + | |
485 | MG_REG_CYL_HIGH); | |
f68adec3 | 486 | outb((u8)((sect_num >> 24) | ATA_LBA | ATA_DEVICE_OBS), |
3fbed4c6 K |
487 | (unsigned long)host->dev_base + MG_REG_DRV_HEAD); |
488 | outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
489 | return MG_ERR_NONE; | |
490 | } | |
491 | ||
492 | static void mg_read(struct request *req) | |
493 | { | |
a03bb5a3 | 494 | u32 j; |
3fbed4c6 K |
495 | struct mg_host *host = req->rq_disk->private_data; |
496 | ||
83096ebf TH |
497 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
498 | MG_CMD_RD, NULL) != MG_ERR_NONE) | |
3fbed4c6 K |
499 | mg_bad_rw_intr(host); |
500 | ||
501 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", | |
83096ebf | 502 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
a03bb5a3 TH |
503 | |
504 | do { | |
505 | u16 *buff = (u16 *)req->buffer; | |
3fbed4c6 | 506 | |
f68adec3 BZ |
507 | if (mg_wait(host, ATA_DRQ, |
508 | MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) { | |
3fbed4c6 K |
509 | mg_bad_rw_intr(host); |
510 | return; | |
511 | } | |
a03bb5a3 TH |
512 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
513 | *buff++ = inw((unsigned long)host->dev_base + | |
514 | MG_BUFF_OFFSET + (j << 1)); | |
3fbed4c6 K |
515 | |
516 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + | |
517 | MG_REG_COMMAND); | |
a03bb5a3 | 518 | } while (__blk_end_request(req, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
519 | } |
520 | ||
521 | static void mg_write(struct request *req) | |
522 | { | |
a03bb5a3 | 523 | u32 j; |
3fbed4c6 K |
524 | struct mg_host *host = req->rq_disk->private_data; |
525 | ||
83096ebf TH |
526 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
527 | MG_CMD_WR, NULL) != MG_ERR_NONE) { | |
3fbed4c6 K |
528 | mg_bad_rw_intr(host); |
529 | return; | |
530 | } | |
531 | ||
3fbed4c6 | 532 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", |
83096ebf | 533 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
a03bb5a3 TH |
534 | |
535 | do { | |
536 | u16 *buff = (u16 *)req->buffer; | |
537 | ||
f68adec3 | 538 | if (mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) { |
3fbed4c6 K |
539 | mg_bad_rw_intr(host); |
540 | return; | |
541 | } | |
a03bb5a3 TH |
542 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
543 | outw(*buff++, (unsigned long)host->dev_base + | |
544 | MG_BUFF_OFFSET + (j << 1)); | |
3fbed4c6 K |
545 | |
546 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + | |
547 | MG_REG_COMMAND); | |
a03bb5a3 | 548 | } while (__blk_end_request(req, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
549 | } |
550 | ||
551 | static void mg_read_intr(struct mg_host *host) | |
552 | { | |
553 | u32 i; | |
a03bb5a3 | 554 | u16 *buff; |
3fbed4c6 K |
555 | struct request *req; |
556 | ||
557 | /* check status */ | |
558 | do { | |
559 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 560 | if (i & ATA_BUSY) |
3fbed4c6 K |
561 | break; |
562 | if (!MG_READY_OK(i)) | |
563 | break; | |
f68adec3 | 564 | if (i & ATA_DRQ) |
3fbed4c6 K |
565 | goto ok_to_read; |
566 | } while (0); | |
567 | mg_dump_status("mg_read_intr", i, host); | |
568 | mg_bad_rw_intr(host); | |
569 | mg_request(host->breq); | |
570 | return; | |
571 | ||
572 | ok_to_read: | |
573 | /* get current segment of request */ | |
574 | req = elv_next_request(host->breq); | |
a03bb5a3 | 575 | buff = (u16 *)req->buffer; |
3fbed4c6 K |
576 | |
577 | /* read 1 sector */ | |
a03bb5a3 TH |
578 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) |
579 | *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET + | |
580 | (i << 1)); | |
3fbed4c6 | 581 | |
3fbed4c6 | 582 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", |
83096ebf | 583 | blk_rq_pos(req), blk_rq_sectors(req) - 1, req->buffer); |
3fbed4c6 | 584 | |
3fbed4c6 K |
585 | /* send read confirm */ |
586 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
587 | ||
a03bb5a3 TH |
588 | if (__blk_end_request(req, 0, MG_SECTOR_SIZE)) { |
589 | /* set handler if read remains */ | |
590 | host->mg_do_intr = mg_read_intr; | |
591 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
592 | } else /* goto next request */ | |
3fbed4c6 K |
593 | mg_request(host->breq); |
594 | } | |
595 | ||
596 | static void mg_write_intr(struct mg_host *host) | |
597 | { | |
598 | u32 i, j; | |
599 | u16 *buff; | |
600 | struct request *req; | |
a03bb5a3 | 601 | bool rem; |
3fbed4c6 K |
602 | |
603 | /* get current segment of request */ | |
604 | req = elv_next_request(host->breq); | |
605 | ||
606 | /* check status */ | |
607 | do { | |
608 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 609 | if (i & ATA_BUSY) |
3fbed4c6 K |
610 | break; |
611 | if (!MG_READY_OK(i)) | |
612 | break; | |
83096ebf | 613 | if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ)) |
3fbed4c6 K |
614 | goto ok_to_write; |
615 | } while (0); | |
616 | mg_dump_status("mg_write_intr", i, host); | |
617 | mg_bad_rw_intr(host); | |
618 | mg_request(host->breq); | |
619 | return; | |
620 | ||
621 | ok_to_write: | |
a03bb5a3 TH |
622 | if ((rem = __blk_end_request(req, 0, MG_SECTOR_SIZE))) { |
623 | /* write 1 sector and set handler if remains */ | |
3fbed4c6 K |
624 | buff = (u16 *)req->buffer; |
625 | for (j = 0; j < MG_STORAGE_BUFFER_SIZE >> 1; j++) { | |
626 | outw(*buff, (unsigned long)host->dev_base + | |
627 | MG_BUFF_OFFSET + (j << 1)); | |
628 | buff++; | |
629 | } | |
630 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", | |
83096ebf | 631 | blk_rq_pos(req), blk_rq_sectors(req), req->buffer); |
3fbed4c6 K |
632 | host->mg_do_intr = mg_write_intr; |
633 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
634 | } | |
635 | ||
636 | /* send write confirm */ | |
637 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
638 | ||
a03bb5a3 | 639 | if (!rem) |
3fbed4c6 K |
640 | mg_request(host->breq); |
641 | } | |
642 | ||
643 | void mg_times_out(unsigned long data) | |
644 | { | |
645 | struct mg_host *host = (struct mg_host *)data; | |
646 | char *name; | |
647 | struct request *req; | |
648 | ||
ac2ff946 TH |
649 | spin_lock_irq(&host->lock); |
650 | ||
3fbed4c6 K |
651 | req = elv_next_request(host->breq); |
652 | if (!req) | |
ac2ff946 | 653 | goto out_unlock; |
3fbed4c6 K |
654 | |
655 | host->mg_do_intr = NULL; | |
656 | ||
657 | name = req->rq_disk->disk_name; | |
658 | printk(KERN_DEBUG "%s: timeout\n", name); | |
659 | ||
660 | host->error = MG_ERR_TIMEOUT; | |
661 | mg_bad_rw_intr(host); | |
662 | ||
663 | mg_request(host->breq); | |
ac2ff946 TH |
664 | out_unlock: |
665 | spin_unlock_irq(&host->lock); | |
3fbed4c6 K |
666 | } |
667 | ||
668 | static void mg_request_poll(struct request_queue *q) | |
669 | { | |
670 | struct request *req; | |
671 | struct mg_host *host; | |
672 | ||
673 | while ((req = elv_next_request(q)) != NULL) { | |
674 | host = req->rq_disk->private_data; | |
675 | if (blk_fs_request(req)) { | |
676 | switch (rq_data_dir(req)) { | |
677 | case READ: | |
678 | mg_read(req); | |
679 | break; | |
680 | case WRITE: | |
681 | mg_write(req); | |
682 | break; | |
3fbed4c6 K |
683 | } |
684 | } | |
685 | } | |
686 | } | |
687 | ||
688 | static unsigned int mg_issue_req(struct request *req, | |
689 | struct mg_host *host, | |
690 | unsigned int sect_num, | |
691 | unsigned int sect_cnt) | |
692 | { | |
693 | u16 *buff; | |
694 | u32 i; | |
695 | ||
696 | switch (rq_data_dir(req)) { | |
697 | case READ: | |
698 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr) | |
699 | != MG_ERR_NONE) { | |
700 | mg_bad_rw_intr(host); | |
701 | return host->error; | |
702 | } | |
703 | break; | |
704 | case WRITE: | |
705 | /* TODO : handler */ | |
f68adec3 | 706 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
707 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr) |
708 | != MG_ERR_NONE) { | |
709 | mg_bad_rw_intr(host); | |
710 | return host->error; | |
711 | } | |
712 | del_timer(&host->timer); | |
f68adec3 BZ |
713 | mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ); |
714 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); | |
3fbed4c6 K |
715 | if (host->error) { |
716 | mg_bad_rw_intr(host); | |
717 | return host->error; | |
718 | } | |
719 | buff = (u16 *)req->buffer; | |
720 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) { | |
721 | outw(*buff, (unsigned long)host->dev_base + | |
722 | MG_BUFF_OFFSET + (i << 1)); | |
723 | buff++; | |
724 | } | |
725 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
726 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + | |
727 | MG_REG_COMMAND); | |
728 | break; | |
3fbed4c6 K |
729 | } |
730 | return MG_ERR_NONE; | |
731 | } | |
732 | ||
733 | /* This function also called from IRQ context */ | |
734 | static void mg_request(struct request_queue *q) | |
735 | { | |
736 | struct request *req; | |
737 | struct mg_host *host; | |
738 | u32 sect_num, sect_cnt; | |
739 | ||
740 | while (1) { | |
741 | req = elv_next_request(q); | |
742 | if (!req) | |
743 | return; | |
744 | ||
745 | host = req->rq_disk->private_data; | |
746 | ||
747 | /* check unwanted request call */ | |
748 | if (host->mg_do_intr) | |
749 | return; | |
750 | ||
751 | del_timer(&host->timer); | |
752 | ||
83096ebf | 753 | sect_num = blk_rq_pos(req); |
3fbed4c6 | 754 | /* deal whole segments */ |
83096ebf | 755 | sect_cnt = blk_rq_sectors(req); |
3fbed4c6 K |
756 | |
757 | /* sanity check */ | |
758 | if (sect_num >= get_capacity(req->rq_disk) || | |
759 | ((sect_num + sect_cnt) > | |
760 | get_capacity(req->rq_disk))) { | |
761 | printk(KERN_WARNING | |
762 | "%s: bad access: sector=%d, count=%d\n", | |
763 | req->rq_disk->disk_name, | |
764 | sect_num, sect_cnt); | |
f06d9a2b | 765 | __blk_end_request_cur(req, -EIO); |
3fbed4c6 K |
766 | continue; |
767 | } | |
768 | ||
769 | if (!blk_fs_request(req)) | |
770 | return; | |
771 | ||
772 | if (!mg_issue_req(req, host, sect_num, sect_cnt)) | |
773 | return; | |
774 | } | |
775 | } | |
776 | ||
777 | static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
778 | { | |
779 | struct mg_host *host = bdev->bd_disk->private_data; | |
780 | ||
781 | geo->cylinders = (unsigned short)host->cyls; | |
782 | geo->heads = (unsigned char)host->heads; | |
783 | geo->sectors = (unsigned char)host->sectors; | |
784 | return 0; | |
785 | } | |
786 | ||
787 | static struct block_device_operations mg_disk_ops = { | |
788 | .getgeo = mg_getgeo | |
789 | }; | |
790 | ||
791 | static int mg_suspend(struct platform_device *plat_dev, pm_message_t state) | |
792 | { | |
793 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
794 | struct mg_host *host = prv_data->host; | |
795 | ||
796 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
797 | return -EIO; | |
798 | ||
799 | if (!prv_data->use_polling) | |
f68adec3 | 800 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
801 | |
802 | outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
803 | /* wait until mflash deep sleep */ | |
804 | msleep(1); | |
805 | ||
806 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) { | |
807 | if (!prv_data->use_polling) | |
f68adec3 | 808 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
809 | return -EIO; |
810 | } | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | static int mg_resume(struct platform_device *plat_dev) | |
816 | { | |
817 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
818 | struct mg_host *host = prv_data->host; | |
819 | ||
820 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
821 | return -EIO; | |
822 | ||
823 | outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
824 | /* wait until mflash wakeup */ | |
825 | msleep(1); | |
826 | ||
827 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
828 | return -EIO; | |
829 | ||
830 | if (!prv_data->use_polling) | |
f68adec3 | 831 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
832 | |
833 | return 0; | |
834 | } | |
835 | ||
836 | static int mg_probe(struct platform_device *plat_dev) | |
837 | { | |
838 | struct mg_host *host; | |
839 | struct resource *rsc; | |
840 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
841 | int err = 0; | |
842 | ||
843 | if (!prv_data) { | |
844 | printk(KERN_ERR "%s:%d fail (no driver_data)\n", | |
845 | __func__, __LINE__); | |
846 | err = -EINVAL; | |
847 | goto probe_err; | |
848 | } | |
849 | ||
850 | /* alloc mg_host */ | |
851 | host = kzalloc(sizeof(struct mg_host), GFP_KERNEL); | |
852 | if (!host) { | |
853 | printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n", | |
854 | __func__, __LINE__); | |
855 | err = -ENOMEM; | |
856 | goto probe_err; | |
857 | } | |
858 | host->major = MG_DISK_MAJ; | |
859 | ||
860 | /* link each other */ | |
861 | prv_data->host = host; | |
862 | host->dev = &plat_dev->dev; | |
863 | ||
864 | /* io remap */ | |
865 | rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0); | |
866 | if (!rsc) { | |
867 | printk(KERN_ERR "%s:%d platform_get_resource fail\n", | |
868 | __func__, __LINE__); | |
869 | err = -EINVAL; | |
870 | goto probe_err_2; | |
871 | } | |
872 | host->dev_base = ioremap(rsc->start , rsc->end + 1); | |
873 | if (!host->dev_base) { | |
874 | printk(KERN_ERR "%s:%d ioremap fail\n", | |
875 | __func__, __LINE__); | |
876 | err = -EIO; | |
877 | goto probe_err_2; | |
878 | } | |
879 | MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base); | |
880 | ||
881 | /* get reset pin */ | |
882 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
883 | MG_RST_PIN); | |
884 | if (!rsc) { | |
885 | printk(KERN_ERR "%s:%d get reset pin fail\n", | |
886 | __func__, __LINE__); | |
887 | err = -EIO; | |
888 | goto probe_err_3; | |
889 | } | |
890 | host->rst = rsc->start; | |
891 | ||
892 | /* init rst pin */ | |
893 | err = gpio_request(host->rst, MG_RST_PIN); | |
894 | if (err) | |
895 | goto probe_err_3; | |
896 | gpio_direction_output(host->rst, 1); | |
897 | ||
898 | /* reset out pin */ | |
899 | if (!(prv_data->dev_attr & MG_DEV_MASK)) | |
900 | goto probe_err_3a; | |
901 | ||
902 | if (prv_data->dev_attr != MG_BOOT_DEV) { | |
903 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
904 | MG_RSTOUT_PIN); | |
905 | if (!rsc) { | |
906 | printk(KERN_ERR "%s:%d get reset-out pin fail\n", | |
907 | __func__, __LINE__); | |
908 | err = -EIO; | |
909 | goto probe_err_3a; | |
910 | } | |
911 | host->rstout = rsc->start; | |
912 | err = gpio_request(host->rstout, MG_RSTOUT_PIN); | |
913 | if (err) | |
914 | goto probe_err_3a; | |
915 | gpio_direction_input(host->rstout); | |
916 | } | |
917 | ||
918 | /* disk reset */ | |
919 | if (prv_data->dev_attr == MG_STORAGE_DEV) { | |
920 | /* If POR seq. not yet finised, wait */ | |
921 | err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT); | |
922 | if (err) | |
923 | goto probe_err_3b; | |
924 | err = mg_disk_init(host); | |
925 | if (err) { | |
926 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
927 | __func__, __LINE__, err); | |
928 | err = -EIO; | |
929 | goto probe_err_3b; | |
930 | } | |
931 | } | |
932 | ||
933 | /* get irq resource */ | |
934 | if (!prv_data->use_polling) { | |
935 | host->irq = platform_get_irq(plat_dev, 0); | |
936 | if (host->irq == -ENXIO) { | |
937 | err = host->irq; | |
938 | goto probe_err_3b; | |
939 | } | |
940 | err = request_irq(host->irq, mg_irq, | |
941 | IRQF_DISABLED | IRQF_TRIGGER_RISING, | |
942 | MG_DEV_NAME, host); | |
943 | if (err) { | |
944 | printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n", | |
945 | __func__, __LINE__, err); | |
946 | goto probe_err_3b; | |
947 | } | |
948 | ||
949 | } | |
950 | ||
951 | /* get disk id */ | |
952 | err = mg_get_disk_id(host); | |
953 | if (err) { | |
954 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
955 | __func__, __LINE__, err); | |
956 | err = -EIO; | |
957 | goto probe_err_4; | |
958 | } | |
959 | ||
960 | err = register_blkdev(host->major, MG_DISK_NAME); | |
961 | if (err < 0) { | |
962 | printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n", | |
963 | __func__, __LINE__, err); | |
964 | goto probe_err_4; | |
965 | } | |
966 | if (!host->major) | |
967 | host->major = err; | |
968 | ||
969 | spin_lock_init(&host->lock); | |
970 | ||
971 | if (prv_data->use_polling) | |
972 | host->breq = blk_init_queue(mg_request_poll, &host->lock); | |
973 | else | |
974 | host->breq = blk_init_queue(mg_request, &host->lock); | |
975 | ||
976 | if (!host->breq) { | |
977 | err = -ENOMEM; | |
978 | printk(KERN_ERR "%s:%d (blk_init_queue) fail\n", | |
979 | __func__, __LINE__); | |
980 | goto probe_err_5; | |
981 | } | |
982 | ||
983 | /* mflash is random device, thanx for the noop */ | |
984 | elevator_exit(host->breq->elevator); | |
985 | err = elevator_init(host->breq, "noop"); | |
986 | if (err) { | |
987 | printk(KERN_ERR "%s:%d (elevator_init) fail\n", | |
988 | __func__, __LINE__); | |
989 | goto probe_err_6; | |
990 | } | |
991 | blk_queue_max_sectors(host->breq, MG_MAX_SECTS); | |
992 | blk_queue_hardsect_size(host->breq, MG_SECTOR_SIZE); | |
993 | ||
994 | init_timer(&host->timer); | |
995 | host->timer.function = mg_times_out; | |
996 | host->timer.data = (unsigned long)host; | |
997 | ||
998 | host->gd = alloc_disk(MG_DISK_MAX_PART); | |
999 | if (!host->gd) { | |
1000 | printk(KERN_ERR "%s:%d (alloc_disk) fail\n", | |
1001 | __func__, __LINE__); | |
1002 | err = -ENOMEM; | |
1003 | goto probe_err_7; | |
1004 | } | |
1005 | host->gd->major = host->major; | |
1006 | host->gd->first_minor = 0; | |
1007 | host->gd->fops = &mg_disk_ops; | |
1008 | host->gd->queue = host->breq; | |
1009 | host->gd->private_data = host; | |
1010 | sprintf(host->gd->disk_name, MG_DISK_NAME"a"); | |
1011 | ||
1012 | set_capacity(host->gd, host->n_sectors); | |
1013 | ||
1014 | add_disk(host->gd); | |
1015 | ||
1016 | return err; | |
1017 | ||
1018 | probe_err_7: | |
1019 | del_timer_sync(&host->timer); | |
1020 | probe_err_6: | |
1021 | blk_cleanup_queue(host->breq); | |
1022 | probe_err_5: | |
1023 | unregister_blkdev(MG_DISK_MAJ, MG_DISK_NAME); | |
1024 | probe_err_4: | |
1025 | if (!prv_data->use_polling) | |
1026 | free_irq(host->irq, host); | |
1027 | probe_err_3b: | |
1028 | gpio_free(host->rstout); | |
1029 | probe_err_3a: | |
1030 | gpio_free(host->rst); | |
1031 | probe_err_3: | |
1032 | iounmap(host->dev_base); | |
1033 | probe_err_2: | |
1034 | kfree(host); | |
1035 | probe_err: | |
1036 | return err; | |
1037 | } | |
1038 | ||
1039 | static int mg_remove(struct platform_device *plat_dev) | |
1040 | { | |
1041 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
1042 | struct mg_host *host = prv_data->host; | |
1043 | int err = 0; | |
1044 | ||
1045 | /* delete timer */ | |
1046 | del_timer_sync(&host->timer); | |
1047 | ||
1048 | /* remove disk */ | |
1049 | if (host->gd) { | |
1050 | del_gendisk(host->gd); | |
1051 | put_disk(host->gd); | |
1052 | } | |
1053 | /* remove queue */ | |
1054 | if (host->breq) | |
1055 | blk_cleanup_queue(host->breq); | |
1056 | ||
1057 | /* unregister blk device */ | |
1058 | unregister_blkdev(host->major, MG_DISK_NAME); | |
1059 | ||
1060 | /* free irq */ | |
1061 | if (!prv_data->use_polling) | |
1062 | free_irq(host->irq, host); | |
1063 | ||
1064 | /* free reset-out pin */ | |
1065 | if (prv_data->dev_attr != MG_BOOT_DEV) | |
1066 | gpio_free(host->rstout); | |
1067 | ||
1068 | /* free rst pin */ | |
1069 | if (host->rst) | |
1070 | gpio_free(host->rst); | |
1071 | ||
1072 | /* unmap io */ | |
1073 | if (host->dev_base) | |
1074 | iounmap(host->dev_base); | |
1075 | ||
1076 | /* free mg_host */ | |
1077 | kfree(host); | |
1078 | ||
1079 | return err; | |
1080 | } | |
1081 | ||
1082 | static struct platform_driver mg_disk_driver = { | |
1083 | .probe = mg_probe, | |
1084 | .remove = mg_remove, | |
1085 | .suspend = mg_suspend, | |
1086 | .resume = mg_resume, | |
1087 | .driver = { | |
1088 | .name = MG_DEV_NAME, | |
1089 | .owner = THIS_MODULE, | |
1090 | } | |
1091 | }; | |
1092 | ||
1093 | /**************************************************************************** | |
1094 | * | |
1095 | * Module stuff | |
1096 | * | |
1097 | ****************************************************************************/ | |
1098 | ||
1099 | static int __init mg_init(void) | |
1100 | { | |
1101 | printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n"); | |
1102 | return platform_driver_register(&mg_disk_driver); | |
1103 | } | |
1104 | ||
1105 | static void __exit mg_exit(void) | |
1106 | { | |
1107 | printk(KERN_INFO "mflash driver : bye bye\n"); | |
1108 | platform_driver_unregister(&mg_disk_driver); | |
1109 | } | |
1110 | ||
1111 | module_init(mg_init); | |
1112 | module_exit(mg_exit); | |
1113 | ||
1114 | MODULE_LICENSE("GPL"); | |
1115 | MODULE_AUTHOR("unsik Kim <donari75@gmail.com>"); | |
1116 | MODULE_DESCRIPTION("mGine m[g]flash device driver"); |