Commit | Line | Data |
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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; | |
5b36ad60 | 138 | struct request *req; |
eec94620 TH |
139 | spinlock_t lock; |
140 | struct gendisk *gd; | |
141 | ||
142 | struct timer_list timer; | |
143 | void (*mg_do_intr) (struct mg_host *); | |
144 | ||
145 | u16 id[ATA_ID_WORDS]; | |
146 | ||
147 | u16 cyls; | |
148 | u16 heads; | |
149 | u16 sectors; | |
150 | u32 n_sectors; | |
151 | u32 nres_sectors; | |
152 | ||
153 | void __iomem *dev_base; | |
154 | unsigned int irq; | |
155 | unsigned int rst; | |
156 | unsigned int rstout; | |
157 | ||
158 | u32 major; | |
159 | u32 error; | |
160 | }; | |
161 | ||
162 | /* | |
163 | * Debugging macro and defines | |
164 | */ | |
165 | #undef DO_MG_DEBUG | |
166 | #ifdef DO_MG_DEBUG | |
167 | # define MG_DBG(fmt, args...) \ | |
168 | printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args) | |
169 | #else /* CONFIG_MG_DEBUG */ | |
170 | # define MG_DBG(fmt, args...) do { } while (0) | |
171 | #endif /* CONFIG_MG_DEBUG */ | |
172 | ||
3fbed4c6 K |
173 | static void mg_request(struct request_queue *); |
174 | ||
5b36ad60 TH |
175 | static bool mg_end_request(struct mg_host *host, int err, unsigned int nr_bytes) |
176 | { | |
177 | if (__blk_end_request(host->req, err, nr_bytes)) | |
178 | return true; | |
179 | ||
180 | host->req = NULL; | |
181 | return false; | |
182 | } | |
183 | ||
184 | static bool mg_end_request_cur(struct mg_host *host, int err) | |
185 | { | |
186 | return mg_end_request(host, err, blk_rq_cur_bytes(host->req)); | |
187 | } | |
188 | ||
3fbed4c6 K |
189 | static void mg_dump_status(const char *msg, unsigned int stat, |
190 | struct mg_host *host) | |
191 | { | |
192 | char *name = MG_DISK_NAME; | |
3fbed4c6 | 193 | |
5b36ad60 TH |
194 | if (host->req) |
195 | name = host->req->rq_disk->disk_name; | |
3fbed4c6 K |
196 | |
197 | printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff); | |
f68adec3 | 198 | if (stat & ATA_BUSY) |
3fbed4c6 | 199 | printk("Busy "); |
f68adec3 | 200 | if (stat & ATA_DRDY) |
3fbed4c6 | 201 | printk("DriveReady "); |
f68adec3 | 202 | if (stat & ATA_DF) |
3fbed4c6 | 203 | printk("WriteFault "); |
f68adec3 | 204 | if (stat & ATA_DSC) |
3fbed4c6 | 205 | printk("SeekComplete "); |
f68adec3 | 206 | if (stat & ATA_DRQ) |
3fbed4c6 | 207 | printk("DataRequest "); |
f68adec3 | 208 | if (stat & ATA_CORR) |
3fbed4c6 | 209 | printk("CorrectedError "); |
f68adec3 | 210 | if (stat & ATA_ERR) |
3fbed4c6 K |
211 | printk("Error "); |
212 | printk("}\n"); | |
f68adec3 | 213 | if ((stat & ATA_ERR) == 0) { |
3fbed4c6 K |
214 | host->error = 0; |
215 | } else { | |
216 | host->error = inb((unsigned long)host->dev_base + MG_REG_ERROR); | |
217 | printk(KERN_ERR "%s: %s: error=0x%02x { ", name, msg, | |
218 | host->error & 0xff); | |
f68adec3 | 219 | if (host->error & ATA_BBK) |
3fbed4c6 | 220 | printk("BadSector "); |
f68adec3 | 221 | if (host->error & ATA_UNC) |
3fbed4c6 | 222 | printk("UncorrectableError "); |
f68adec3 | 223 | if (host->error & ATA_IDNF) |
3fbed4c6 | 224 | printk("SectorIdNotFound "); |
f68adec3 | 225 | if (host->error & ATA_ABORTED) |
3fbed4c6 | 226 | printk("DriveStatusError "); |
f68adec3 | 227 | if (host->error & ATA_AMNF) |
3fbed4c6 K |
228 | printk("AddrMarkNotFound "); |
229 | printk("}"); | |
f68adec3 | 230 | if (host->error & (ATA_BBK | ATA_UNC | ATA_IDNF | ATA_AMNF)) { |
5b36ad60 TH |
231 | if (host->req) |
232 | printk(", sector=%u", | |
233 | (unsigned int)blk_rq_pos(host->req)); | |
3fbed4c6 K |
234 | } |
235 | printk("\n"); | |
236 | } | |
237 | } | |
238 | ||
239 | static unsigned int mg_wait(struct mg_host *host, u32 expect, u32 msec) | |
240 | { | |
241 | u8 status; | |
242 | unsigned long expire, cur_jiffies; | |
243 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
244 | ||
245 | host->error = MG_ERR_NONE; | |
246 | expire = jiffies + msecs_to_jiffies(msec); | |
247 | ||
248 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
249 | ||
250 | do { | |
251 | cur_jiffies = jiffies; | |
f68adec3 BZ |
252 | if (status & ATA_BUSY) { |
253 | if (expect == ATA_BUSY) | |
3fbed4c6 K |
254 | break; |
255 | } else { | |
256 | /* Check the error condition! */ | |
f68adec3 | 257 | if (status & ATA_ERR) { |
3fbed4c6 K |
258 | mg_dump_status("mg_wait", status, host); |
259 | break; | |
260 | } | |
261 | ||
262 | if (expect == MG_STAT_READY) | |
263 | if (MG_READY_OK(status)) | |
264 | break; | |
265 | ||
f68adec3 BZ |
266 | if (expect == ATA_DRQ) |
267 | if (status & ATA_DRQ) | |
3fbed4c6 K |
268 | break; |
269 | } | |
270 | if (!msec) { | |
271 | mg_dump_status("not ready", status, host); | |
272 | return MG_ERR_INV_STAT; | |
273 | } | |
274 | if (prv_data->use_polling) | |
275 | msleep(1); | |
276 | ||
277 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
278 | } while (time_before(cur_jiffies, expire)); | |
279 | ||
280 | if (time_after_eq(cur_jiffies, expire) && msec) | |
281 | host->error = MG_ERR_TIMEOUT; | |
282 | ||
283 | return host->error; | |
284 | } | |
285 | ||
286 | static unsigned int mg_wait_rstout(u32 rstout, u32 msec) | |
287 | { | |
288 | unsigned long expire; | |
289 | ||
290 | expire = jiffies + msecs_to_jiffies(msec); | |
291 | while (time_before(jiffies, expire)) { | |
292 | if (gpio_get_value(rstout) == 1) | |
293 | return MG_ERR_NONE; | |
294 | msleep(10); | |
295 | } | |
296 | ||
297 | return MG_ERR_RSTOUT; | |
298 | } | |
299 | ||
300 | static void mg_unexpected_intr(struct mg_host *host) | |
301 | { | |
302 | u32 status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
303 | ||
304 | mg_dump_status("mg_unexpected_intr", status, host); | |
305 | } | |
306 | ||
307 | static irqreturn_t mg_irq(int irq, void *dev_id) | |
308 | { | |
309 | struct mg_host *host = dev_id; | |
310 | void (*handler)(struct mg_host *) = host->mg_do_intr; | |
311 | ||
ac2ff946 TH |
312 | spin_lock(&host->lock); |
313 | ||
314 | host->mg_do_intr = NULL; | |
3fbed4c6 K |
315 | del_timer(&host->timer); |
316 | if (!handler) | |
317 | handler = mg_unexpected_intr; | |
318 | handler(host); | |
ac2ff946 TH |
319 | |
320 | spin_unlock(&host->lock); | |
321 | ||
3fbed4c6 K |
322 | return IRQ_HANDLED; |
323 | } | |
324 | ||
8a11a789 BZ |
325 | /* local copy of ata_id_string() */ |
326 | static void mg_id_string(const u16 *id, unsigned char *s, | |
327 | unsigned int ofs, unsigned int len) | |
328 | { | |
329 | unsigned int c; | |
330 | ||
331 | BUG_ON(len & 1); | |
332 | ||
333 | while (len > 0) { | |
334 | c = id[ofs] >> 8; | |
335 | *s = c; | |
336 | s++; | |
337 | ||
338 | c = id[ofs] & 0xff; | |
339 | *s = c; | |
340 | s++; | |
341 | ||
342 | ofs++; | |
343 | len -= 2; | |
344 | } | |
345 | } | |
346 | ||
347 | /* local copy of ata_id_c_string() */ | |
348 | static void mg_id_c_string(const u16 *id, unsigned char *s, | |
349 | unsigned int ofs, unsigned int len) | |
350 | { | |
351 | unsigned char *p; | |
352 | ||
353 | mg_id_string(id, s, ofs, len - 1); | |
354 | ||
355 | p = s + strnlen(s, len - 1); | |
356 | while (p > s && p[-1] == ' ') | |
357 | p--; | |
358 | *p = '\0'; | |
359 | } | |
360 | ||
3fbed4c6 K |
361 | static int mg_get_disk_id(struct mg_host *host) |
362 | { | |
363 | u32 i; | |
364 | s32 err; | |
365 | const u16 *id = host->id; | |
366 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
367 | char fwrev[ATA_ID_FW_REV_LEN + 1]; | |
368 | char model[ATA_ID_PROD_LEN + 1]; | |
369 | char serial[ATA_ID_SERNO_LEN + 1]; | |
370 | ||
371 | if (!prv_data->use_polling) | |
f68adec3 | 372 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
373 | |
374 | outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
f68adec3 | 375 | err = mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_RD_DRQ); |
3fbed4c6 K |
376 | if (err) |
377 | return err; | |
378 | ||
379 | for (i = 0; i < (MG_SECTOR_SIZE >> 1); i++) | |
380 | host->id[i] = le16_to_cpu(inw((unsigned long)host->dev_base + | |
381 | MG_BUFF_OFFSET + i * 2)); | |
382 | ||
383 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
384 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD); | |
385 | if (err) | |
386 | return err; | |
387 | ||
388 | if ((id[ATA_ID_FIELD_VALID] & 1) == 0) | |
389 | return MG_ERR_TRANSLATION; | |
390 | ||
391 | host->n_sectors = ata_id_u32(id, ATA_ID_LBA_CAPACITY); | |
392 | host->cyls = id[ATA_ID_CYLS]; | |
393 | host->heads = id[ATA_ID_HEADS]; | |
394 | host->sectors = id[ATA_ID_SECTORS]; | |
395 | ||
396 | if (MG_RES_SEC && host->heads && host->sectors) { | |
397 | /* modify cyls, n_sectors */ | |
398 | host->cyls = (host->n_sectors - MG_RES_SEC) / | |
399 | host->heads / host->sectors; | |
400 | host->nres_sectors = host->n_sectors - host->cyls * | |
401 | host->heads * host->sectors; | |
402 | host->n_sectors -= host->nres_sectors; | |
403 | } | |
404 | ||
8a11a789 BZ |
405 | mg_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev)); |
406 | mg_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); | |
407 | mg_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial)); | |
3fbed4c6 K |
408 | printk(KERN_INFO "mg_disk: model: %s\n", model); |
409 | printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev); | |
410 | printk(KERN_INFO "mg_disk: serial: %s\n", serial); | |
411 | printk(KERN_INFO "mg_disk: %d + reserved %d sectors\n", | |
412 | host->n_sectors, host->nres_sectors); | |
413 | ||
414 | if (!prv_data->use_polling) | |
f68adec3 | 415 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
416 | |
417 | return err; | |
418 | } | |
419 | ||
420 | ||
421 | static int mg_disk_init(struct mg_host *host) | |
422 | { | |
423 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
424 | s32 err; | |
425 | u8 init_status; | |
426 | ||
427 | /* hdd rst low */ | |
428 | gpio_set_value(host->rst, 0); | |
f68adec3 | 429 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
3fbed4c6 K |
430 | if (err) |
431 | return err; | |
432 | ||
433 | /* hdd rst high */ | |
434 | gpio_set_value(host->rst, 1); | |
435 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_HDRST_TO_RDY); | |
436 | if (err) | |
437 | return err; | |
438 | ||
439 | /* soft reset on */ | |
f68adec3 | 440 | outb(ATA_SRST | (prv_data->use_polling ? ATA_NIEN : 0), |
3fbed4c6 | 441 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
f68adec3 | 442 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
3fbed4c6 K |
443 | if (err) |
444 | return err; | |
445 | ||
446 | /* soft reset off */ | |
f68adec3 | 447 | outb(prv_data->use_polling ? ATA_NIEN : 0, |
3fbed4c6 K |
448 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
449 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY); | |
450 | if (err) | |
451 | return err; | |
452 | ||
453 | init_status = inb((unsigned long)host->dev_base + MG_REG_STATUS) & 0xf; | |
454 | ||
455 | if (init_status == 0xf) | |
456 | return MG_ERR_INIT_STAT; | |
457 | ||
458 | return err; | |
459 | } | |
460 | ||
461 | static void mg_bad_rw_intr(struct mg_host *host) | |
462 | { | |
5b36ad60 TH |
463 | if (host->req) |
464 | if (++host->req->errors >= MG_MAX_ERRORS || | |
465 | host->error == MG_ERR_TIMEOUT) | |
466 | mg_end_request_cur(host, -EIO); | |
3fbed4c6 K |
467 | } |
468 | ||
469 | static unsigned int mg_out(struct mg_host *host, | |
470 | unsigned int sect_num, | |
471 | unsigned int sect_cnt, | |
472 | unsigned int cmd, | |
473 | void (*intr_addr)(struct mg_host *)) | |
474 | { | |
475 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
476 | ||
477 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
478 | return host->error; | |
479 | ||
480 | if (!prv_data->use_polling) { | |
481 | host->mg_do_intr = intr_addr; | |
482 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
483 | } | |
484 | if (MG_RES_SEC) | |
485 | sect_num += MG_RES_SEC; | |
486 | outb((u8)sect_cnt, (unsigned long)host->dev_base + MG_REG_SECT_CNT); | |
487 | outb((u8)sect_num, (unsigned long)host->dev_base + MG_REG_SECT_NUM); | |
488 | outb((u8)(sect_num >> 8), (unsigned long)host->dev_base + | |
489 | MG_REG_CYL_LOW); | |
490 | outb((u8)(sect_num >> 16), (unsigned long)host->dev_base + | |
491 | MG_REG_CYL_HIGH); | |
f68adec3 | 492 | outb((u8)((sect_num >> 24) | ATA_LBA | ATA_DEVICE_OBS), |
3fbed4c6 K |
493 | (unsigned long)host->dev_base + MG_REG_DRV_HEAD); |
494 | outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
495 | return MG_ERR_NONE; | |
496 | } | |
497 | ||
498 | static void mg_read(struct request *req) | |
499 | { | |
a03bb5a3 | 500 | u32 j; |
3fbed4c6 K |
501 | struct mg_host *host = req->rq_disk->private_data; |
502 | ||
83096ebf TH |
503 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
504 | MG_CMD_RD, NULL) != MG_ERR_NONE) | |
3fbed4c6 K |
505 | mg_bad_rw_intr(host); |
506 | ||
507 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", | |
83096ebf | 508 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
a03bb5a3 TH |
509 | |
510 | do { | |
511 | u16 *buff = (u16 *)req->buffer; | |
3fbed4c6 | 512 | |
f68adec3 BZ |
513 | if (mg_wait(host, ATA_DRQ, |
514 | MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) { | |
3fbed4c6 K |
515 | mg_bad_rw_intr(host); |
516 | return; | |
517 | } | |
a03bb5a3 TH |
518 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
519 | *buff++ = inw((unsigned long)host->dev_base + | |
520 | MG_BUFF_OFFSET + (j << 1)); | |
3fbed4c6 K |
521 | |
522 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + | |
523 | MG_REG_COMMAND); | |
5b36ad60 | 524 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
525 | } |
526 | ||
527 | static void mg_write(struct request *req) | |
528 | { | |
a03bb5a3 | 529 | u32 j; |
3fbed4c6 K |
530 | struct mg_host *host = req->rq_disk->private_data; |
531 | ||
83096ebf TH |
532 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
533 | MG_CMD_WR, NULL) != MG_ERR_NONE) { | |
3fbed4c6 K |
534 | mg_bad_rw_intr(host); |
535 | return; | |
536 | } | |
537 | ||
3fbed4c6 | 538 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", |
83096ebf | 539 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
a03bb5a3 TH |
540 | |
541 | do { | |
542 | u16 *buff = (u16 *)req->buffer; | |
543 | ||
f68adec3 | 544 | if (mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) { |
3fbed4c6 K |
545 | mg_bad_rw_intr(host); |
546 | return; | |
547 | } | |
a03bb5a3 TH |
548 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
549 | outw(*buff++, (unsigned long)host->dev_base + | |
550 | MG_BUFF_OFFSET + (j << 1)); | |
3fbed4c6 K |
551 | |
552 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + | |
553 | MG_REG_COMMAND); | |
5b36ad60 | 554 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
555 | } |
556 | ||
557 | static void mg_read_intr(struct mg_host *host) | |
558 | { | |
5b36ad60 | 559 | struct request *req = host->req; |
3fbed4c6 | 560 | u32 i; |
a03bb5a3 | 561 | u16 *buff; |
3fbed4c6 K |
562 | |
563 | /* check status */ | |
564 | do { | |
565 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 566 | if (i & ATA_BUSY) |
3fbed4c6 K |
567 | break; |
568 | if (!MG_READY_OK(i)) | |
569 | break; | |
f68adec3 | 570 | if (i & ATA_DRQ) |
3fbed4c6 K |
571 | goto ok_to_read; |
572 | } while (0); | |
573 | mg_dump_status("mg_read_intr", i, host); | |
574 | mg_bad_rw_intr(host); | |
575 | mg_request(host->breq); | |
576 | return; | |
577 | ||
578 | ok_to_read: | |
579 | /* get current segment of request */ | |
a03bb5a3 | 580 | buff = (u16 *)req->buffer; |
3fbed4c6 K |
581 | |
582 | /* read 1 sector */ | |
a03bb5a3 TH |
583 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) |
584 | *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET + | |
585 | (i << 1)); | |
3fbed4c6 | 586 | |
3fbed4c6 | 587 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", |
83096ebf | 588 | blk_rq_pos(req), blk_rq_sectors(req) - 1, req->buffer); |
3fbed4c6 | 589 | |
3fbed4c6 K |
590 | /* send read confirm */ |
591 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
592 | ||
5b36ad60 | 593 | if (mg_end_request(host, 0, MG_SECTOR_SIZE)) { |
a03bb5a3 TH |
594 | /* set handler if read remains */ |
595 | host->mg_do_intr = mg_read_intr; | |
596 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
597 | } else /* goto next request */ | |
3fbed4c6 K |
598 | mg_request(host->breq); |
599 | } | |
600 | ||
601 | static void mg_write_intr(struct mg_host *host) | |
602 | { | |
5b36ad60 | 603 | struct request *req = host->req; |
3fbed4c6 K |
604 | u32 i, j; |
605 | u16 *buff; | |
a03bb5a3 | 606 | bool rem; |
3fbed4c6 | 607 | |
3fbed4c6 K |
608 | /* check status */ |
609 | do { | |
610 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 611 | if (i & ATA_BUSY) |
3fbed4c6 K |
612 | break; |
613 | if (!MG_READY_OK(i)) | |
614 | break; | |
83096ebf | 615 | if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ)) |
3fbed4c6 K |
616 | goto ok_to_write; |
617 | } while (0); | |
618 | mg_dump_status("mg_write_intr", i, host); | |
619 | mg_bad_rw_intr(host); | |
620 | mg_request(host->breq); | |
621 | return; | |
622 | ||
623 | ok_to_write: | |
5b36ad60 | 624 | if ((rem = mg_end_request(host, 0, MG_SECTOR_SIZE))) { |
a03bb5a3 | 625 | /* write 1 sector and set handler if remains */ |
3fbed4c6 K |
626 | buff = (u16 *)req->buffer; |
627 | for (j = 0; j < MG_STORAGE_BUFFER_SIZE >> 1; j++) { | |
628 | outw(*buff, (unsigned long)host->dev_base + | |
629 | MG_BUFF_OFFSET + (j << 1)); | |
630 | buff++; | |
631 | } | |
632 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", | |
83096ebf | 633 | blk_rq_pos(req), blk_rq_sectors(req), req->buffer); |
3fbed4c6 K |
634 | host->mg_do_intr = mg_write_intr; |
635 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
636 | } | |
637 | ||
638 | /* send write confirm */ | |
639 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
640 | ||
a03bb5a3 | 641 | if (!rem) |
3fbed4c6 K |
642 | mg_request(host->breq); |
643 | } | |
644 | ||
645 | void mg_times_out(unsigned long data) | |
646 | { | |
647 | struct mg_host *host = (struct mg_host *)data; | |
648 | char *name; | |
3fbed4c6 | 649 | |
ac2ff946 TH |
650 | spin_lock_irq(&host->lock); |
651 | ||
5b36ad60 | 652 | if (!host->req) |
ac2ff946 | 653 | goto out_unlock; |
3fbed4c6 K |
654 | |
655 | host->mg_do_intr = NULL; | |
656 | ||
5b36ad60 | 657 | name = host->req->rq_disk->disk_name; |
3fbed4c6 K |
658 | printk(KERN_DEBUG "%s: timeout\n", name); |
659 | ||
660 | host->error = MG_ERR_TIMEOUT; | |
661 | mg_bad_rw_intr(host); | |
662 | ||
ac2ff946 | 663 | out_unlock: |
5b36ad60 | 664 | mg_request(host->breq); |
ac2ff946 | 665 | spin_unlock_irq(&host->lock); |
3fbed4c6 K |
666 | } |
667 | ||
668 | static void mg_request_poll(struct request_queue *q) | |
669 | { | |
5b36ad60 | 670 | struct mg_host *host = q->queuedata; |
3fbed4c6 | 671 | |
5b36ad60 TH |
672 | while (1) { |
673 | if (!host->req) { | |
9934c8c0 TH |
674 | host->req = blk_fetch_request(q); |
675 | if (!host->req) | |
5b36ad60 TH |
676 | break; |
677 | } | |
9a8d23d8 | 678 | |
5b36ad60 TH |
679 | if (unlikely(!blk_fs_request(host->req))) { |
680 | mg_end_request_cur(host, -EIO); | |
9a8d23d8 | 681 | continue; |
3fbed4c6 | 682 | } |
9a8d23d8 | 683 | |
5b36ad60 TH |
684 | if (rq_data_dir(host->req) == READ) |
685 | mg_read(host->req); | |
9a8d23d8 | 686 | else |
5b36ad60 | 687 | mg_write(host->req); |
3fbed4c6 K |
688 | } |
689 | } | |
690 | ||
691 | static unsigned int mg_issue_req(struct request *req, | |
692 | struct mg_host *host, | |
693 | unsigned int sect_num, | |
694 | unsigned int sect_cnt) | |
695 | { | |
696 | u16 *buff; | |
697 | u32 i; | |
698 | ||
699 | switch (rq_data_dir(req)) { | |
700 | case READ: | |
701 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr) | |
702 | != MG_ERR_NONE) { | |
703 | mg_bad_rw_intr(host); | |
704 | return host->error; | |
705 | } | |
706 | break; | |
707 | case WRITE: | |
708 | /* TODO : handler */ | |
f68adec3 | 709 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
710 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr) |
711 | != MG_ERR_NONE) { | |
712 | mg_bad_rw_intr(host); | |
713 | return host->error; | |
714 | } | |
715 | del_timer(&host->timer); | |
f68adec3 BZ |
716 | mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ); |
717 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); | |
3fbed4c6 K |
718 | if (host->error) { |
719 | mg_bad_rw_intr(host); | |
720 | return host->error; | |
721 | } | |
722 | buff = (u16 *)req->buffer; | |
723 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) { | |
724 | outw(*buff, (unsigned long)host->dev_base + | |
725 | MG_BUFF_OFFSET + (i << 1)); | |
726 | buff++; | |
727 | } | |
728 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
729 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + | |
730 | MG_REG_COMMAND); | |
731 | break; | |
3fbed4c6 K |
732 | } |
733 | return MG_ERR_NONE; | |
734 | } | |
735 | ||
736 | /* This function also called from IRQ context */ | |
737 | static void mg_request(struct request_queue *q) | |
738 | { | |
5b36ad60 | 739 | struct mg_host *host = q->queuedata; |
3fbed4c6 | 740 | struct request *req; |
3fbed4c6 K |
741 | u32 sect_num, sect_cnt; |
742 | ||
743 | while (1) { | |
5b36ad60 | 744 | if (!host->req) { |
9934c8c0 TH |
745 | host->req = blk_fetch_request(q); |
746 | if (!host->req) | |
5b36ad60 TH |
747 | break; |
748 | } | |
749 | req = host->req; | |
3fbed4c6 K |
750 | |
751 | /* check unwanted request call */ | |
752 | if (host->mg_do_intr) | |
753 | return; | |
754 | ||
755 | del_timer(&host->timer); | |
756 | ||
83096ebf | 757 | sect_num = blk_rq_pos(req); |
3fbed4c6 | 758 | /* deal whole segments */ |
83096ebf | 759 | sect_cnt = blk_rq_sectors(req); |
3fbed4c6 K |
760 | |
761 | /* sanity check */ | |
762 | if (sect_num >= get_capacity(req->rq_disk) || | |
763 | ((sect_num + sect_cnt) > | |
764 | get_capacity(req->rq_disk))) { | |
765 | printk(KERN_WARNING | |
766 | "%s: bad access: sector=%d, count=%d\n", | |
767 | req->rq_disk->disk_name, | |
768 | sect_num, sect_cnt); | |
5b36ad60 | 769 | mg_end_request_cur(host, -EIO); |
3fbed4c6 K |
770 | continue; |
771 | } | |
772 | ||
9a8d23d8 | 773 | if (unlikely(!blk_fs_request(req))) { |
5b36ad60 | 774 | mg_end_request_cur(host, -EIO); |
9a8d23d8 TH |
775 | continue; |
776 | } | |
3fbed4c6 K |
777 | |
778 | if (!mg_issue_req(req, host, sect_num, sect_cnt)) | |
779 | return; | |
780 | } | |
781 | } | |
782 | ||
783 | static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
784 | { | |
785 | struct mg_host *host = bdev->bd_disk->private_data; | |
786 | ||
787 | geo->cylinders = (unsigned short)host->cyls; | |
788 | geo->heads = (unsigned char)host->heads; | |
789 | geo->sectors = (unsigned char)host->sectors; | |
790 | return 0; | |
791 | } | |
792 | ||
793 | static struct block_device_operations mg_disk_ops = { | |
794 | .getgeo = mg_getgeo | |
795 | }; | |
796 | ||
797 | static int mg_suspend(struct platform_device *plat_dev, pm_message_t state) | |
798 | { | |
799 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
800 | struct mg_host *host = prv_data->host; | |
801 | ||
802 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
803 | return -EIO; | |
804 | ||
805 | if (!prv_data->use_polling) | |
f68adec3 | 806 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
807 | |
808 | outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
809 | /* wait until mflash deep sleep */ | |
810 | msleep(1); | |
811 | ||
812 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) { | |
813 | if (!prv_data->use_polling) | |
f68adec3 | 814 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
815 | return -EIO; |
816 | } | |
817 | ||
818 | return 0; | |
819 | } | |
820 | ||
821 | static int mg_resume(struct platform_device *plat_dev) | |
822 | { | |
823 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
824 | struct mg_host *host = prv_data->host; | |
825 | ||
826 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
827 | return -EIO; | |
828 | ||
829 | outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
830 | /* wait until mflash wakeup */ | |
831 | msleep(1); | |
832 | ||
833 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
834 | return -EIO; | |
835 | ||
836 | if (!prv_data->use_polling) | |
f68adec3 | 837 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
838 | |
839 | return 0; | |
840 | } | |
841 | ||
842 | static int mg_probe(struct platform_device *plat_dev) | |
843 | { | |
844 | struct mg_host *host; | |
845 | struct resource *rsc; | |
846 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
847 | int err = 0; | |
848 | ||
849 | if (!prv_data) { | |
850 | printk(KERN_ERR "%s:%d fail (no driver_data)\n", | |
851 | __func__, __LINE__); | |
852 | err = -EINVAL; | |
853 | goto probe_err; | |
854 | } | |
855 | ||
856 | /* alloc mg_host */ | |
857 | host = kzalloc(sizeof(struct mg_host), GFP_KERNEL); | |
858 | if (!host) { | |
859 | printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n", | |
860 | __func__, __LINE__); | |
861 | err = -ENOMEM; | |
862 | goto probe_err; | |
863 | } | |
864 | host->major = MG_DISK_MAJ; | |
865 | ||
866 | /* link each other */ | |
867 | prv_data->host = host; | |
868 | host->dev = &plat_dev->dev; | |
869 | ||
870 | /* io remap */ | |
871 | rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0); | |
872 | if (!rsc) { | |
873 | printk(KERN_ERR "%s:%d platform_get_resource fail\n", | |
874 | __func__, __LINE__); | |
875 | err = -EINVAL; | |
876 | goto probe_err_2; | |
877 | } | |
878 | host->dev_base = ioremap(rsc->start , rsc->end + 1); | |
879 | if (!host->dev_base) { | |
880 | printk(KERN_ERR "%s:%d ioremap fail\n", | |
881 | __func__, __LINE__); | |
882 | err = -EIO; | |
883 | goto probe_err_2; | |
884 | } | |
885 | MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base); | |
886 | ||
887 | /* get reset pin */ | |
888 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
889 | MG_RST_PIN); | |
890 | if (!rsc) { | |
891 | printk(KERN_ERR "%s:%d get reset pin fail\n", | |
892 | __func__, __LINE__); | |
893 | err = -EIO; | |
894 | goto probe_err_3; | |
895 | } | |
896 | host->rst = rsc->start; | |
897 | ||
898 | /* init rst pin */ | |
899 | err = gpio_request(host->rst, MG_RST_PIN); | |
900 | if (err) | |
901 | goto probe_err_3; | |
902 | gpio_direction_output(host->rst, 1); | |
903 | ||
904 | /* reset out pin */ | |
905 | if (!(prv_data->dev_attr & MG_DEV_MASK)) | |
906 | goto probe_err_3a; | |
907 | ||
908 | if (prv_data->dev_attr != MG_BOOT_DEV) { | |
909 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
910 | MG_RSTOUT_PIN); | |
911 | if (!rsc) { | |
912 | printk(KERN_ERR "%s:%d get reset-out pin fail\n", | |
913 | __func__, __LINE__); | |
914 | err = -EIO; | |
915 | goto probe_err_3a; | |
916 | } | |
917 | host->rstout = rsc->start; | |
918 | err = gpio_request(host->rstout, MG_RSTOUT_PIN); | |
919 | if (err) | |
920 | goto probe_err_3a; | |
921 | gpio_direction_input(host->rstout); | |
922 | } | |
923 | ||
924 | /* disk reset */ | |
925 | if (prv_data->dev_attr == MG_STORAGE_DEV) { | |
926 | /* If POR seq. not yet finised, wait */ | |
927 | err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT); | |
928 | if (err) | |
929 | goto probe_err_3b; | |
930 | err = mg_disk_init(host); | |
931 | if (err) { | |
932 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
933 | __func__, __LINE__, err); | |
934 | err = -EIO; | |
935 | goto probe_err_3b; | |
936 | } | |
937 | } | |
938 | ||
939 | /* get irq resource */ | |
940 | if (!prv_data->use_polling) { | |
941 | host->irq = platform_get_irq(plat_dev, 0); | |
942 | if (host->irq == -ENXIO) { | |
943 | err = host->irq; | |
944 | goto probe_err_3b; | |
945 | } | |
946 | err = request_irq(host->irq, mg_irq, | |
947 | IRQF_DISABLED | IRQF_TRIGGER_RISING, | |
948 | MG_DEV_NAME, host); | |
949 | if (err) { | |
950 | printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n", | |
951 | __func__, __LINE__, err); | |
952 | goto probe_err_3b; | |
953 | } | |
954 | ||
955 | } | |
956 | ||
957 | /* get disk id */ | |
958 | err = mg_get_disk_id(host); | |
959 | if (err) { | |
960 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
961 | __func__, __LINE__, err); | |
962 | err = -EIO; | |
963 | goto probe_err_4; | |
964 | } | |
965 | ||
966 | err = register_blkdev(host->major, MG_DISK_NAME); | |
967 | if (err < 0) { | |
968 | printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n", | |
969 | __func__, __LINE__, err); | |
970 | goto probe_err_4; | |
971 | } | |
972 | if (!host->major) | |
973 | host->major = err; | |
974 | ||
975 | spin_lock_init(&host->lock); | |
976 | ||
977 | if (prv_data->use_polling) | |
978 | host->breq = blk_init_queue(mg_request_poll, &host->lock); | |
979 | else | |
980 | host->breq = blk_init_queue(mg_request, &host->lock); | |
981 | ||
982 | if (!host->breq) { | |
983 | err = -ENOMEM; | |
984 | printk(KERN_ERR "%s:%d (blk_init_queue) fail\n", | |
985 | __func__, __LINE__); | |
986 | goto probe_err_5; | |
987 | } | |
5b36ad60 | 988 | host->breq->queuedata = host; |
3fbed4c6 K |
989 | |
990 | /* mflash is random device, thanx for the noop */ | |
991 | elevator_exit(host->breq->elevator); | |
992 | err = elevator_init(host->breq, "noop"); | |
993 | if (err) { | |
994 | printk(KERN_ERR "%s:%d (elevator_init) fail\n", | |
995 | __func__, __LINE__); | |
996 | goto probe_err_6; | |
997 | } | |
998 | blk_queue_max_sectors(host->breq, MG_MAX_SECTS); | |
999 | blk_queue_hardsect_size(host->breq, MG_SECTOR_SIZE); | |
1000 | ||
1001 | init_timer(&host->timer); | |
1002 | host->timer.function = mg_times_out; | |
1003 | host->timer.data = (unsigned long)host; | |
1004 | ||
1005 | host->gd = alloc_disk(MG_DISK_MAX_PART); | |
1006 | if (!host->gd) { | |
1007 | printk(KERN_ERR "%s:%d (alloc_disk) fail\n", | |
1008 | __func__, __LINE__); | |
1009 | err = -ENOMEM; | |
1010 | goto probe_err_7; | |
1011 | } | |
1012 | host->gd->major = host->major; | |
1013 | host->gd->first_minor = 0; | |
1014 | host->gd->fops = &mg_disk_ops; | |
1015 | host->gd->queue = host->breq; | |
1016 | host->gd->private_data = host; | |
1017 | sprintf(host->gd->disk_name, MG_DISK_NAME"a"); | |
1018 | ||
1019 | set_capacity(host->gd, host->n_sectors); | |
1020 | ||
1021 | add_disk(host->gd); | |
1022 | ||
1023 | return err; | |
1024 | ||
1025 | probe_err_7: | |
1026 | del_timer_sync(&host->timer); | |
1027 | probe_err_6: | |
1028 | blk_cleanup_queue(host->breq); | |
1029 | probe_err_5: | |
1030 | unregister_blkdev(MG_DISK_MAJ, MG_DISK_NAME); | |
1031 | probe_err_4: | |
1032 | if (!prv_data->use_polling) | |
1033 | free_irq(host->irq, host); | |
1034 | probe_err_3b: | |
1035 | gpio_free(host->rstout); | |
1036 | probe_err_3a: | |
1037 | gpio_free(host->rst); | |
1038 | probe_err_3: | |
1039 | iounmap(host->dev_base); | |
1040 | probe_err_2: | |
1041 | kfree(host); | |
1042 | probe_err: | |
1043 | return err; | |
1044 | } | |
1045 | ||
1046 | static int mg_remove(struct platform_device *plat_dev) | |
1047 | { | |
1048 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
1049 | struct mg_host *host = prv_data->host; | |
1050 | int err = 0; | |
1051 | ||
1052 | /* delete timer */ | |
1053 | del_timer_sync(&host->timer); | |
1054 | ||
1055 | /* remove disk */ | |
1056 | if (host->gd) { | |
1057 | del_gendisk(host->gd); | |
1058 | put_disk(host->gd); | |
1059 | } | |
1060 | /* remove queue */ | |
1061 | if (host->breq) | |
1062 | blk_cleanup_queue(host->breq); | |
1063 | ||
1064 | /* unregister blk device */ | |
1065 | unregister_blkdev(host->major, MG_DISK_NAME); | |
1066 | ||
1067 | /* free irq */ | |
1068 | if (!prv_data->use_polling) | |
1069 | free_irq(host->irq, host); | |
1070 | ||
1071 | /* free reset-out pin */ | |
1072 | if (prv_data->dev_attr != MG_BOOT_DEV) | |
1073 | gpio_free(host->rstout); | |
1074 | ||
1075 | /* free rst pin */ | |
1076 | if (host->rst) | |
1077 | gpio_free(host->rst); | |
1078 | ||
1079 | /* unmap io */ | |
1080 | if (host->dev_base) | |
1081 | iounmap(host->dev_base); | |
1082 | ||
1083 | /* free mg_host */ | |
1084 | kfree(host); | |
1085 | ||
1086 | return err; | |
1087 | } | |
1088 | ||
1089 | static struct platform_driver mg_disk_driver = { | |
1090 | .probe = mg_probe, | |
1091 | .remove = mg_remove, | |
1092 | .suspend = mg_suspend, | |
1093 | .resume = mg_resume, | |
1094 | .driver = { | |
1095 | .name = MG_DEV_NAME, | |
1096 | .owner = THIS_MODULE, | |
1097 | } | |
1098 | }; | |
1099 | ||
1100 | /**************************************************************************** | |
1101 | * | |
1102 | * Module stuff | |
1103 | * | |
1104 | ****************************************************************************/ | |
1105 | ||
1106 | static int __init mg_init(void) | |
1107 | { | |
1108 | printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n"); | |
1109 | return platform_driver_register(&mg_disk_driver); | |
1110 | } | |
1111 | ||
1112 | static void __exit mg_exit(void) | |
1113 | { | |
1114 | printk(KERN_INFO "mflash driver : bye bye\n"); | |
1115 | platform_driver_unregister(&mg_disk_driver); | |
1116 | } | |
1117 | ||
1118 | module_init(mg_init); | |
1119 | module_exit(mg_exit); | |
1120 | ||
1121 | MODULE_LICENSE("GPL"); | |
1122 | MODULE_AUTHOR("unsik Kim <donari75@gmail.com>"); | |
1123 | MODULE_DESCRIPTION("mGine m[g]flash device driver"); |