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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> | |
5ced504b | 25 | #include <linux/mg_disk.h> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
3fbed4c6 K |
27 | |
28 | #define MG_RES_SEC (CONFIG_MG_DISK_RES << 1) | |
29 | ||
eec94620 TH |
30 | /* name for block device */ |
31 | #define MG_DISK_NAME "mgd" | |
eec94620 TH |
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 | |
eec94620 TH |
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 | ||
eec94620 | 53 | /* handy status */ |
f68adec3 BZ |
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) | |
eec94620 TH |
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 | ||
eec94620 TH |
105 | #define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST) |
106 | ||
eec94620 TH |
107 | /* main structure for mflash driver */ |
108 | struct mg_host { | |
109 | struct device *dev; | |
110 | ||
111 | struct request_queue *breq; | |
5b36ad60 | 112 | struct request *req; |
eec94620 TH |
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 | ||
3fbed4c6 K |
147 | static void mg_request(struct request_queue *); |
148 | ||
5b36ad60 TH |
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 | ||
3fbed4c6 K |
163 | static void mg_dump_status(const char *msg, unsigned int stat, |
164 | struct mg_host *host) | |
165 | { | |
166 | char *name = MG_DISK_NAME; | |
3fbed4c6 | 167 | |
5b36ad60 TH |
168 | if (host->req) |
169 | name = host->req->rq_disk->disk_name; | |
3fbed4c6 K |
170 | |
171 | printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff); | |
f68adec3 | 172 | if (stat & ATA_BUSY) |
3fbed4c6 | 173 | printk("Busy "); |
f68adec3 | 174 | if (stat & ATA_DRDY) |
3fbed4c6 | 175 | printk("DriveReady "); |
f68adec3 | 176 | if (stat & ATA_DF) |
3fbed4c6 | 177 | printk("WriteFault "); |
f68adec3 | 178 | if (stat & ATA_DSC) |
3fbed4c6 | 179 | printk("SeekComplete "); |
f68adec3 | 180 | if (stat & ATA_DRQ) |
3fbed4c6 | 181 | printk("DataRequest "); |
f68adec3 | 182 | if (stat & ATA_CORR) |
3fbed4c6 | 183 | printk("CorrectedError "); |
f68adec3 | 184 | if (stat & ATA_ERR) |
3fbed4c6 K |
185 | printk("Error "); |
186 | printk("}\n"); | |
f68adec3 | 187 | if ((stat & ATA_ERR) == 0) { |
3fbed4c6 K |
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); | |
f68adec3 | 193 | if (host->error & ATA_BBK) |
3fbed4c6 | 194 | printk("BadSector "); |
f68adec3 | 195 | if (host->error & ATA_UNC) |
3fbed4c6 | 196 | printk("UncorrectableError "); |
f68adec3 | 197 | if (host->error & ATA_IDNF) |
3fbed4c6 | 198 | printk("SectorIdNotFound "); |
f68adec3 | 199 | if (host->error & ATA_ABORTED) |
3fbed4c6 | 200 | printk("DriveStatusError "); |
f68adec3 | 201 | if (host->error & ATA_AMNF) |
3fbed4c6 K |
202 | printk("AddrMarkNotFound "); |
203 | printk("}"); | |
f68adec3 | 204 | if (host->error & (ATA_BBK | ATA_UNC | ATA_IDNF | ATA_AMNF)) { |
5b36ad60 TH |
205 | if (host->req) |
206 | printk(", sector=%u", | |
207 | (unsigned int)blk_rq_pos(host->req)); | |
3fbed4c6 K |
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 | ||
eb32baec K |
222 | /* These 2 times dummy status read prevents reading invalid |
223 | * status. A very little time (3 times of mflash operating clk) | |
224 | * is required for busy bit is set. Use dummy read instead of | |
225 | * busy wait, because mflash's PLL is machine dependent. | |
226 | */ | |
227 | if (prv_data->use_polling) { | |
228 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
229 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
230 | } | |
231 | ||
3fbed4c6 K |
232 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); |
233 | ||
234 | do { | |
235 | cur_jiffies = jiffies; | |
f68adec3 BZ |
236 | if (status & ATA_BUSY) { |
237 | if (expect == ATA_BUSY) | |
3fbed4c6 K |
238 | break; |
239 | } else { | |
240 | /* Check the error condition! */ | |
f68adec3 | 241 | if (status & ATA_ERR) { |
3fbed4c6 K |
242 | mg_dump_status("mg_wait", status, host); |
243 | break; | |
244 | } | |
245 | ||
246 | if (expect == MG_STAT_READY) | |
247 | if (MG_READY_OK(status)) | |
248 | break; | |
249 | ||
f68adec3 BZ |
250 | if (expect == ATA_DRQ) |
251 | if (status & ATA_DRQ) | |
3fbed4c6 K |
252 | break; |
253 | } | |
254 | if (!msec) { | |
255 | mg_dump_status("not ready", status, host); | |
256 | return MG_ERR_INV_STAT; | |
257 | } | |
3fbed4c6 K |
258 | |
259 | status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
260 | } while (time_before(cur_jiffies, expire)); | |
261 | ||
262 | if (time_after_eq(cur_jiffies, expire) && msec) | |
263 | host->error = MG_ERR_TIMEOUT; | |
264 | ||
265 | return host->error; | |
266 | } | |
267 | ||
268 | static unsigned int mg_wait_rstout(u32 rstout, u32 msec) | |
269 | { | |
270 | unsigned long expire; | |
271 | ||
272 | expire = jiffies + msecs_to_jiffies(msec); | |
273 | while (time_before(jiffies, expire)) { | |
274 | if (gpio_get_value(rstout) == 1) | |
275 | return MG_ERR_NONE; | |
276 | msleep(10); | |
277 | } | |
278 | ||
279 | return MG_ERR_RSTOUT; | |
280 | } | |
281 | ||
282 | static void mg_unexpected_intr(struct mg_host *host) | |
283 | { | |
284 | u32 status = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
285 | ||
286 | mg_dump_status("mg_unexpected_intr", status, host); | |
287 | } | |
288 | ||
289 | static irqreturn_t mg_irq(int irq, void *dev_id) | |
290 | { | |
291 | struct mg_host *host = dev_id; | |
292 | void (*handler)(struct mg_host *) = host->mg_do_intr; | |
293 | ||
ac2ff946 TH |
294 | spin_lock(&host->lock); |
295 | ||
296 | host->mg_do_intr = NULL; | |
3fbed4c6 K |
297 | del_timer(&host->timer); |
298 | if (!handler) | |
299 | handler = mg_unexpected_intr; | |
300 | handler(host); | |
ac2ff946 TH |
301 | |
302 | spin_unlock(&host->lock); | |
303 | ||
3fbed4c6 K |
304 | return IRQ_HANDLED; |
305 | } | |
306 | ||
8a11a789 BZ |
307 | /* local copy of ata_id_string() */ |
308 | static void mg_id_string(const u16 *id, unsigned char *s, | |
309 | unsigned int ofs, unsigned int len) | |
310 | { | |
311 | unsigned int c; | |
312 | ||
313 | BUG_ON(len & 1); | |
314 | ||
315 | while (len > 0) { | |
316 | c = id[ofs] >> 8; | |
317 | *s = c; | |
318 | s++; | |
319 | ||
320 | c = id[ofs] & 0xff; | |
321 | *s = c; | |
322 | s++; | |
323 | ||
324 | ofs++; | |
325 | len -= 2; | |
326 | } | |
327 | } | |
328 | ||
329 | /* local copy of ata_id_c_string() */ | |
330 | static void mg_id_c_string(const u16 *id, unsigned char *s, | |
331 | unsigned int ofs, unsigned int len) | |
332 | { | |
333 | unsigned char *p; | |
334 | ||
335 | mg_id_string(id, s, ofs, len - 1); | |
336 | ||
337 | p = s + strnlen(s, len - 1); | |
338 | while (p > s && p[-1] == ' ') | |
339 | p--; | |
340 | *p = '\0'; | |
341 | } | |
342 | ||
3fbed4c6 K |
343 | static int mg_get_disk_id(struct mg_host *host) |
344 | { | |
345 | u32 i; | |
346 | s32 err; | |
347 | const u16 *id = host->id; | |
348 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
349 | char fwrev[ATA_ID_FW_REV_LEN + 1]; | |
350 | char model[ATA_ID_PROD_LEN + 1]; | |
351 | char serial[ATA_ID_SERNO_LEN + 1]; | |
352 | ||
353 | if (!prv_data->use_polling) | |
f68adec3 | 354 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
355 | |
356 | outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
f68adec3 | 357 | err = mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_RD_DRQ); |
3fbed4c6 K |
358 | if (err) |
359 | return err; | |
360 | ||
361 | for (i = 0; i < (MG_SECTOR_SIZE >> 1); i++) | |
362 | host->id[i] = le16_to_cpu(inw((unsigned long)host->dev_base + | |
363 | MG_BUFF_OFFSET + i * 2)); | |
364 | ||
365 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
366 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD); | |
367 | if (err) | |
368 | return err; | |
369 | ||
370 | if ((id[ATA_ID_FIELD_VALID] & 1) == 0) | |
371 | return MG_ERR_TRANSLATION; | |
372 | ||
373 | host->n_sectors = ata_id_u32(id, ATA_ID_LBA_CAPACITY); | |
374 | host->cyls = id[ATA_ID_CYLS]; | |
375 | host->heads = id[ATA_ID_HEADS]; | |
376 | host->sectors = id[ATA_ID_SECTORS]; | |
377 | ||
378 | if (MG_RES_SEC && host->heads && host->sectors) { | |
379 | /* modify cyls, n_sectors */ | |
380 | host->cyls = (host->n_sectors - MG_RES_SEC) / | |
381 | host->heads / host->sectors; | |
382 | host->nres_sectors = host->n_sectors - host->cyls * | |
383 | host->heads * host->sectors; | |
384 | host->n_sectors -= host->nres_sectors; | |
385 | } | |
386 | ||
8a11a789 BZ |
387 | mg_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev)); |
388 | mg_id_c_string(id, model, ATA_ID_PROD, sizeof(model)); | |
389 | mg_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial)); | |
3fbed4c6 K |
390 | printk(KERN_INFO "mg_disk: model: %s\n", model); |
391 | printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev); | |
392 | printk(KERN_INFO "mg_disk: serial: %s\n", serial); | |
393 | printk(KERN_INFO "mg_disk: %d + reserved %d sectors\n", | |
394 | host->n_sectors, host->nres_sectors); | |
395 | ||
396 | if (!prv_data->use_polling) | |
f68adec3 | 397 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
398 | |
399 | return err; | |
400 | } | |
401 | ||
402 | ||
403 | static int mg_disk_init(struct mg_host *host) | |
404 | { | |
405 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
406 | s32 err; | |
407 | u8 init_status; | |
408 | ||
409 | /* hdd rst low */ | |
410 | gpio_set_value(host->rst, 0); | |
f68adec3 | 411 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
3fbed4c6 K |
412 | if (err) |
413 | return err; | |
414 | ||
415 | /* hdd rst high */ | |
416 | gpio_set_value(host->rst, 1); | |
417 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_HDRST_TO_RDY); | |
418 | if (err) | |
419 | return err; | |
420 | ||
421 | /* soft reset on */ | |
f68adec3 | 422 | outb(ATA_SRST | (prv_data->use_polling ? ATA_NIEN : 0), |
3fbed4c6 | 423 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
f68adec3 | 424 | err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY); |
3fbed4c6 K |
425 | if (err) |
426 | return err; | |
427 | ||
428 | /* soft reset off */ | |
f68adec3 | 429 | outb(prv_data->use_polling ? ATA_NIEN : 0, |
3fbed4c6 K |
430 | (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
431 | err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY); | |
432 | if (err) | |
433 | return err; | |
434 | ||
435 | init_status = inb((unsigned long)host->dev_base + MG_REG_STATUS) & 0xf; | |
436 | ||
437 | if (init_status == 0xf) | |
438 | return MG_ERR_INIT_STAT; | |
439 | ||
440 | return err; | |
441 | } | |
442 | ||
443 | static void mg_bad_rw_intr(struct mg_host *host) | |
444 | { | |
5b36ad60 TH |
445 | if (host->req) |
446 | if (++host->req->errors >= MG_MAX_ERRORS || | |
447 | host->error == MG_ERR_TIMEOUT) | |
448 | mg_end_request_cur(host, -EIO); | |
3fbed4c6 K |
449 | } |
450 | ||
451 | static unsigned int mg_out(struct mg_host *host, | |
452 | unsigned int sect_num, | |
453 | unsigned int sect_cnt, | |
454 | unsigned int cmd, | |
455 | void (*intr_addr)(struct mg_host *)) | |
456 | { | |
457 | struct mg_drv_data *prv_data = host->dev->platform_data; | |
458 | ||
459 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
460 | return host->error; | |
461 | ||
462 | if (!prv_data->use_polling) { | |
463 | host->mg_do_intr = intr_addr; | |
464 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
465 | } | |
466 | if (MG_RES_SEC) | |
467 | sect_num += MG_RES_SEC; | |
468 | outb((u8)sect_cnt, (unsigned long)host->dev_base + MG_REG_SECT_CNT); | |
469 | outb((u8)sect_num, (unsigned long)host->dev_base + MG_REG_SECT_NUM); | |
470 | outb((u8)(sect_num >> 8), (unsigned long)host->dev_base + | |
471 | MG_REG_CYL_LOW); | |
472 | outb((u8)(sect_num >> 16), (unsigned long)host->dev_base + | |
473 | MG_REG_CYL_HIGH); | |
f68adec3 | 474 | outb((u8)((sect_num >> 24) | ATA_LBA | ATA_DEVICE_OBS), |
3fbed4c6 K |
475 | (unsigned long)host->dev_base + MG_REG_DRV_HEAD); |
476 | outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
477 | return MG_ERR_NONE; | |
478 | } | |
479 | ||
394c6cc6 BZ |
480 | static void mg_read_one(struct mg_host *host, struct request *req) |
481 | { | |
b4f42e28 | 482 | u16 *buff = (u16 *)bio_data(req->bio); |
394c6cc6 BZ |
483 | u32 i; |
484 | ||
485 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) | |
486 | *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET + | |
487 | (i << 1)); | |
488 | } | |
489 | ||
3fbed4c6 K |
490 | static void mg_read(struct request *req) |
491 | { | |
3fbed4c6 K |
492 | struct mg_host *host = req->rq_disk->private_data; |
493 | ||
83096ebf TH |
494 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
495 | MG_CMD_RD, NULL) != MG_ERR_NONE) | |
3fbed4c6 K |
496 | mg_bad_rw_intr(host); |
497 | ||
498 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", | |
b4f42e28 | 499 | blk_rq_sectors(req), blk_rq_pos(req), bio_data(req->bio)); |
a03bb5a3 TH |
500 | |
501 | do { | |
f68adec3 BZ |
502 | if (mg_wait(host, ATA_DRQ, |
503 | MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) { | |
3fbed4c6 K |
504 | mg_bad_rw_intr(host); |
505 | return; | |
506 | } | |
394c6cc6 BZ |
507 | |
508 | mg_read_one(host, req); | |
3fbed4c6 K |
509 | |
510 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + | |
511 | MG_REG_COMMAND); | |
5b36ad60 | 512 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
513 | } |
514 | ||
394c6cc6 BZ |
515 | static void mg_write_one(struct mg_host *host, struct request *req) |
516 | { | |
b4f42e28 | 517 | u16 *buff = (u16 *)bio_data(req->bio); |
394c6cc6 BZ |
518 | u32 i; |
519 | ||
520 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) | |
521 | outw(*buff++, (unsigned long)host->dev_base + MG_BUFF_OFFSET + | |
522 | (i << 1)); | |
523 | } | |
524 | ||
3fbed4c6 K |
525 | static void mg_write(struct request *req) |
526 | { | |
3fbed4c6 | 527 | struct mg_host *host = req->rq_disk->private_data; |
a85a00a6 | 528 | unsigned int rem = blk_rq_sectors(req); |
3fbed4c6 | 529 | |
a85a00a6 | 530 | if (mg_out(host, blk_rq_pos(req), rem, |
83096ebf | 531 | MG_CMD_WR, NULL) != MG_ERR_NONE) { |
3fbed4c6 K |
532 | mg_bad_rw_intr(host); |
533 | return; | |
534 | } | |
535 | ||
3fbed4c6 | 536 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", |
b4f42e28 | 537 | rem, blk_rq_pos(req), bio_data(req->bio)); |
a03bb5a3 | 538 | |
394c6cc6 BZ |
539 | if (mg_wait(host, ATA_DRQ, |
540 | MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) { | |
541 | mg_bad_rw_intr(host); | |
542 | return; | |
543 | } | |
544 | ||
a85a00a6 K |
545 | do { |
546 | mg_write_one(host, req); | |
394c6cc6 | 547 | |
a85a00a6 K |
548 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + |
549 | MG_REG_COMMAND); | |
a03bb5a3 | 550 | |
a85a00a6 K |
551 | rem--; |
552 | if (rem > 1 && mg_wait(host, ATA_DRQ, | |
553 | MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) { | |
554 | mg_bad_rw_intr(host); | |
555 | return; | |
556 | } else if (mg_wait(host, MG_STAT_READY, | |
557 | MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) { | |
3fbed4c6 K |
558 | mg_bad_rw_intr(host); |
559 | return; | |
560 | } | |
a85a00a6 | 561 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
562 | } |
563 | ||
564 | static void mg_read_intr(struct mg_host *host) | |
565 | { | |
5b36ad60 | 566 | struct request *req = host->req; |
3fbed4c6 | 567 | u32 i; |
3fbed4c6 K |
568 | |
569 | /* check status */ | |
570 | do { | |
571 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 572 | if (i & ATA_BUSY) |
3fbed4c6 K |
573 | break; |
574 | if (!MG_READY_OK(i)) | |
575 | break; | |
f68adec3 | 576 | if (i & ATA_DRQ) |
3fbed4c6 K |
577 | goto ok_to_read; |
578 | } while (0); | |
579 | mg_dump_status("mg_read_intr", i, host); | |
580 | mg_bad_rw_intr(host); | |
581 | mg_request(host->breq); | |
582 | return; | |
583 | ||
584 | ok_to_read: | |
394c6cc6 | 585 | mg_read_one(host, req); |
3fbed4c6 | 586 | |
3fbed4c6 | 587 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", |
b4f42e28 | 588 | blk_rq_pos(req), blk_rq_sectors(req) - 1, bio_data(req->bio)); |
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; |
394c6cc6 | 604 | u32 i; |
a03bb5a3 | 605 | bool rem; |
3fbed4c6 | 606 | |
3fbed4c6 K |
607 | /* check status */ |
608 | do { | |
609 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 610 | if (i & ATA_BUSY) |
3fbed4c6 K |
611 | break; |
612 | if (!MG_READY_OK(i)) | |
613 | break; | |
83096ebf | 614 | if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ)) |
3fbed4c6 K |
615 | goto ok_to_write; |
616 | } while (0); | |
617 | mg_dump_status("mg_write_intr", i, host); | |
618 | mg_bad_rw_intr(host); | |
619 | mg_request(host->breq); | |
620 | return; | |
621 | ||
622 | ok_to_write: | |
5b36ad60 | 623 | if ((rem = mg_end_request(host, 0, MG_SECTOR_SIZE))) { |
a03bb5a3 | 624 | /* write 1 sector and set handler if remains */ |
394c6cc6 | 625 | mg_write_one(host, req); |
3fbed4c6 | 626 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", |
b4f42e28 | 627 | blk_rq_pos(req), blk_rq_sectors(req), bio_data(req->bio)); |
3fbed4c6 K |
628 | host->mg_do_intr = mg_write_intr; |
629 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
630 | } | |
631 | ||
632 | /* send write confirm */ | |
633 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
634 | ||
a03bb5a3 | 635 | if (!rem) |
3fbed4c6 K |
636 | mg_request(host->breq); |
637 | } | |
638 | ||
c86db975 | 639 | static void mg_times_out(unsigned long data) |
3fbed4c6 K |
640 | { |
641 | struct mg_host *host = (struct mg_host *)data; | |
642 | char *name; | |
3fbed4c6 | 643 | |
ac2ff946 TH |
644 | spin_lock_irq(&host->lock); |
645 | ||
5b36ad60 | 646 | if (!host->req) |
ac2ff946 | 647 | goto out_unlock; |
3fbed4c6 K |
648 | |
649 | host->mg_do_intr = NULL; | |
650 | ||
5b36ad60 | 651 | name = host->req->rq_disk->disk_name; |
3fbed4c6 K |
652 | printk(KERN_DEBUG "%s: timeout\n", name); |
653 | ||
654 | host->error = MG_ERR_TIMEOUT; | |
655 | mg_bad_rw_intr(host); | |
656 | ||
ac2ff946 | 657 | out_unlock: |
5b36ad60 | 658 | mg_request(host->breq); |
ac2ff946 | 659 | spin_unlock_irq(&host->lock); |
3fbed4c6 K |
660 | } |
661 | ||
662 | static void mg_request_poll(struct request_queue *q) | |
663 | { | |
5b36ad60 | 664 | struct mg_host *host = q->queuedata; |
3fbed4c6 | 665 | |
5b36ad60 TH |
666 | while (1) { |
667 | if (!host->req) { | |
9934c8c0 TH |
668 | host->req = blk_fetch_request(q); |
669 | if (!host->req) | |
5b36ad60 TH |
670 | break; |
671 | } | |
9a8d23d8 | 672 | |
33659ebb | 673 | if (unlikely(host->req->cmd_type != REQ_TYPE_FS)) { |
5b36ad60 | 674 | mg_end_request_cur(host, -EIO); |
9a8d23d8 | 675 | continue; |
3fbed4c6 | 676 | } |
9a8d23d8 | 677 | |
5b36ad60 TH |
678 | if (rq_data_dir(host->req) == READ) |
679 | mg_read(host->req); | |
9a8d23d8 | 680 | else |
5b36ad60 | 681 | mg_write(host->req); |
3fbed4c6 K |
682 | } |
683 | } | |
684 | ||
685 | static unsigned int mg_issue_req(struct request *req, | |
686 | struct mg_host *host, | |
687 | unsigned int sect_num, | |
688 | unsigned int sect_cnt) | |
689 | { | |
56332f02 | 690 | if (rq_data_dir(req) == READ) { |
3fbed4c6 K |
691 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr) |
692 | != MG_ERR_NONE) { | |
693 | mg_bad_rw_intr(host); | |
694 | return host->error; | |
695 | } | |
56332f02 | 696 | } else { |
3fbed4c6 | 697 | /* TODO : handler */ |
f68adec3 | 698 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
699 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr) |
700 | != MG_ERR_NONE) { | |
701 | mg_bad_rw_intr(host); | |
702 | return host->error; | |
703 | } | |
704 | del_timer(&host->timer); | |
f68adec3 BZ |
705 | mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ); |
706 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); | |
3fbed4c6 K |
707 | if (host->error) { |
708 | mg_bad_rw_intr(host); | |
709 | return host->error; | |
710 | } | |
394c6cc6 | 711 | mg_write_one(host, req); |
3fbed4c6 K |
712 | mod_timer(&host->timer, jiffies + 3 * HZ); |
713 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + | |
714 | MG_REG_COMMAND); | |
3fbed4c6 K |
715 | } |
716 | return MG_ERR_NONE; | |
717 | } | |
718 | ||
719 | /* This function also called from IRQ context */ | |
720 | static void mg_request(struct request_queue *q) | |
721 | { | |
5b36ad60 | 722 | struct mg_host *host = q->queuedata; |
3fbed4c6 | 723 | struct request *req; |
3fbed4c6 K |
724 | u32 sect_num, sect_cnt; |
725 | ||
726 | while (1) { | |
5b36ad60 | 727 | if (!host->req) { |
9934c8c0 TH |
728 | host->req = blk_fetch_request(q); |
729 | if (!host->req) | |
5b36ad60 TH |
730 | break; |
731 | } | |
732 | req = host->req; | |
3fbed4c6 K |
733 | |
734 | /* check unwanted request call */ | |
735 | if (host->mg_do_intr) | |
736 | return; | |
737 | ||
738 | del_timer(&host->timer); | |
739 | ||
83096ebf | 740 | sect_num = blk_rq_pos(req); |
3fbed4c6 | 741 | /* deal whole segments */ |
83096ebf | 742 | sect_cnt = blk_rq_sectors(req); |
3fbed4c6 K |
743 | |
744 | /* sanity check */ | |
745 | if (sect_num >= get_capacity(req->rq_disk) || | |
746 | ((sect_num + sect_cnt) > | |
747 | get_capacity(req->rq_disk))) { | |
748 | printk(KERN_WARNING | |
749 | "%s: bad access: sector=%d, count=%d\n", | |
750 | req->rq_disk->disk_name, | |
751 | sect_num, sect_cnt); | |
5b36ad60 | 752 | mg_end_request_cur(host, -EIO); |
3fbed4c6 K |
753 | continue; |
754 | } | |
755 | ||
33659ebb | 756 | if (unlikely(req->cmd_type != REQ_TYPE_FS)) { |
5b36ad60 | 757 | mg_end_request_cur(host, -EIO); |
9a8d23d8 TH |
758 | continue; |
759 | } | |
3fbed4c6 K |
760 | |
761 | if (!mg_issue_req(req, host, sect_num, sect_cnt)) | |
762 | return; | |
763 | } | |
764 | } | |
765 | ||
766 | static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
767 | { | |
768 | struct mg_host *host = bdev->bd_disk->private_data; | |
769 | ||
770 | geo->cylinders = (unsigned short)host->cyls; | |
771 | geo->heads = (unsigned char)host->heads; | |
772 | geo->sectors = (unsigned char)host->sectors; | |
773 | return 0; | |
774 | } | |
775 | ||
83d5cde4 | 776 | static const struct block_device_operations mg_disk_ops = { |
3fbed4c6 K |
777 | .getgeo = mg_getgeo |
778 | }; | |
779 | ||
aed3d67e | 780 | #ifdef CONFIG_PM_SLEEP |
156ffcb4 | 781 | static int mg_suspend(struct device *dev) |
3fbed4c6 | 782 | { |
156ffcb4 | 783 | struct mg_drv_data *prv_data = dev->platform_data; |
3fbed4c6 K |
784 | struct mg_host *host = prv_data->host; |
785 | ||
786 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
787 | return -EIO; | |
788 | ||
789 | if (!prv_data->use_polling) | |
f68adec3 | 790 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
791 | |
792 | outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
793 | /* wait until mflash deep sleep */ | |
794 | msleep(1); | |
795 | ||
796 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) { | |
797 | if (!prv_data->use_polling) | |
f68adec3 | 798 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
799 | return -EIO; |
800 | } | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
156ffcb4 | 805 | static int mg_resume(struct device *dev) |
3fbed4c6 | 806 | { |
156ffcb4 | 807 | struct mg_drv_data *prv_data = dev->platform_data; |
3fbed4c6 K |
808 | struct mg_host *host = prv_data->host; |
809 | ||
810 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
811 | return -EIO; | |
812 | ||
813 | outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
814 | /* wait until mflash wakeup */ | |
815 | msleep(1); | |
816 | ||
817 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
818 | return -EIO; | |
819 | ||
820 | if (!prv_data->use_polling) | |
f68adec3 | 821 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
822 | |
823 | return 0; | |
824 | } | |
aed3d67e | 825 | #endif |
3fbed4c6 | 826 | |
156ffcb4 RW |
827 | static SIMPLE_DEV_PM_OPS(mg_pm, mg_suspend, mg_resume); |
828 | ||
3fbed4c6 K |
829 | static int mg_probe(struct platform_device *plat_dev) |
830 | { | |
831 | struct mg_host *host; | |
832 | struct resource *rsc; | |
833 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
834 | int err = 0; | |
835 | ||
836 | if (!prv_data) { | |
837 | printk(KERN_ERR "%s:%d fail (no driver_data)\n", | |
838 | __func__, __LINE__); | |
839 | err = -EINVAL; | |
840 | goto probe_err; | |
841 | } | |
842 | ||
843 | /* alloc mg_host */ | |
844 | host = kzalloc(sizeof(struct mg_host), GFP_KERNEL); | |
845 | if (!host) { | |
846 | printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n", | |
847 | __func__, __LINE__); | |
848 | err = -ENOMEM; | |
849 | goto probe_err; | |
850 | } | |
851 | host->major = MG_DISK_MAJ; | |
852 | ||
853 | /* link each other */ | |
854 | prv_data->host = host; | |
855 | host->dev = &plat_dev->dev; | |
856 | ||
857 | /* io remap */ | |
858 | rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0); | |
859 | if (!rsc) { | |
860 | printk(KERN_ERR "%s:%d platform_get_resource fail\n", | |
861 | __func__, __LINE__); | |
862 | err = -EINVAL; | |
863 | goto probe_err_2; | |
864 | } | |
e019ef0c | 865 | host->dev_base = ioremap(rsc->start, resource_size(rsc)); |
3fbed4c6 K |
866 | if (!host->dev_base) { |
867 | printk(KERN_ERR "%s:%d ioremap fail\n", | |
868 | __func__, __LINE__); | |
869 | err = -EIO; | |
870 | goto probe_err_2; | |
871 | } | |
872 | MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base); | |
873 | ||
874 | /* get reset pin */ | |
875 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
876 | MG_RST_PIN); | |
877 | if (!rsc) { | |
878 | printk(KERN_ERR "%s:%d get reset pin fail\n", | |
879 | __func__, __LINE__); | |
880 | err = -EIO; | |
881 | goto probe_err_3; | |
882 | } | |
883 | host->rst = rsc->start; | |
884 | ||
885 | /* init rst pin */ | |
886 | err = gpio_request(host->rst, MG_RST_PIN); | |
887 | if (err) | |
888 | goto probe_err_3; | |
889 | gpio_direction_output(host->rst, 1); | |
890 | ||
891 | /* reset out pin */ | |
c613c5f6 WY |
892 | if (!(prv_data->dev_attr & MG_DEV_MASK)) { |
893 | err = -EINVAL; | |
3fbed4c6 | 894 | goto probe_err_3a; |
c613c5f6 | 895 | } |
3fbed4c6 K |
896 | |
897 | if (prv_data->dev_attr != MG_BOOT_DEV) { | |
898 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
899 | MG_RSTOUT_PIN); | |
900 | if (!rsc) { | |
901 | printk(KERN_ERR "%s:%d get reset-out pin fail\n", | |
902 | __func__, __LINE__); | |
903 | err = -EIO; | |
904 | goto probe_err_3a; | |
905 | } | |
906 | host->rstout = rsc->start; | |
907 | err = gpio_request(host->rstout, MG_RSTOUT_PIN); | |
908 | if (err) | |
909 | goto probe_err_3a; | |
910 | gpio_direction_input(host->rstout); | |
911 | } | |
912 | ||
913 | /* disk reset */ | |
914 | if (prv_data->dev_attr == MG_STORAGE_DEV) { | |
14424be4 | 915 | /* If POR seq. not yet finished, wait */ |
3fbed4c6 K |
916 | err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT); |
917 | if (err) | |
918 | goto probe_err_3b; | |
919 | err = mg_disk_init(host); | |
920 | if (err) { | |
921 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
922 | __func__, __LINE__, err); | |
923 | err = -EIO; | |
924 | goto probe_err_3b; | |
925 | } | |
926 | } | |
927 | ||
928 | /* get irq resource */ | |
929 | if (!prv_data->use_polling) { | |
930 | host->irq = platform_get_irq(plat_dev, 0); | |
931 | if (host->irq == -ENXIO) { | |
932 | err = host->irq; | |
933 | goto probe_err_3b; | |
934 | } | |
935 | err = request_irq(host->irq, mg_irq, | |
370d6686 | 936 | IRQF_TRIGGER_RISING, |
3fbed4c6 K |
937 | MG_DEV_NAME, host); |
938 | if (err) { | |
939 | printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n", | |
940 | __func__, __LINE__, err); | |
941 | goto probe_err_3b; | |
942 | } | |
943 | ||
944 | } | |
945 | ||
946 | /* get disk id */ | |
947 | err = mg_get_disk_id(host); | |
948 | if (err) { | |
949 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
950 | __func__, __LINE__, err); | |
951 | err = -EIO; | |
952 | goto probe_err_4; | |
953 | } | |
954 | ||
955 | err = register_blkdev(host->major, MG_DISK_NAME); | |
956 | if (err < 0) { | |
957 | printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n", | |
958 | __func__, __LINE__, err); | |
959 | goto probe_err_4; | |
960 | } | |
961 | if (!host->major) | |
962 | host->major = err; | |
963 | ||
964 | spin_lock_init(&host->lock); | |
965 | ||
966 | if (prv_data->use_polling) | |
967 | host->breq = blk_init_queue(mg_request_poll, &host->lock); | |
968 | else | |
969 | host->breq = blk_init_queue(mg_request, &host->lock); | |
970 | ||
971 | if (!host->breq) { | |
972 | err = -ENOMEM; | |
973 | printk(KERN_ERR "%s:%d (blk_init_queue) fail\n", | |
974 | __func__, __LINE__); | |
975 | goto probe_err_5; | |
976 | } | |
5b36ad60 | 977 | host->breq->queuedata = host; |
3fbed4c6 K |
978 | |
979 | /* mflash is random device, thanx for the noop */ | |
52cc2eef | 980 | err = elevator_change(host->breq, "noop"); |
3fbed4c6 K |
981 | if (err) { |
982 | printk(KERN_ERR "%s:%d (elevator_init) fail\n", | |
983 | __func__, __LINE__); | |
984 | goto probe_err_6; | |
985 | } | |
086fa5ff | 986 | blk_queue_max_hw_sectors(host->breq, MG_MAX_SECTS); |
e1defc4f | 987 | blk_queue_logical_block_size(host->breq, MG_SECTOR_SIZE); |
3fbed4c6 K |
988 | |
989 | init_timer(&host->timer); | |
990 | host->timer.function = mg_times_out; | |
991 | host->timer.data = (unsigned long)host; | |
992 | ||
993 | host->gd = alloc_disk(MG_DISK_MAX_PART); | |
994 | if (!host->gd) { | |
995 | printk(KERN_ERR "%s:%d (alloc_disk) fail\n", | |
996 | __func__, __LINE__); | |
997 | err = -ENOMEM; | |
998 | goto probe_err_7; | |
999 | } | |
1000 | host->gd->major = host->major; | |
1001 | host->gd->first_minor = 0; | |
1002 | host->gd->fops = &mg_disk_ops; | |
1003 | host->gd->queue = host->breq; | |
1004 | host->gd->private_data = host; | |
1005 | sprintf(host->gd->disk_name, MG_DISK_NAME"a"); | |
1006 | ||
1007 | set_capacity(host->gd, host->n_sectors); | |
1008 | ||
1009 | add_disk(host->gd); | |
1010 | ||
1011 | return err; | |
1012 | ||
1013 | probe_err_7: | |
1014 | del_timer_sync(&host->timer); | |
1015 | probe_err_6: | |
1016 | blk_cleanup_queue(host->breq); | |
1017 | probe_err_5: | |
1018 | unregister_blkdev(MG_DISK_MAJ, MG_DISK_NAME); | |
1019 | probe_err_4: | |
1020 | if (!prv_data->use_polling) | |
1021 | free_irq(host->irq, host); | |
1022 | probe_err_3b: | |
1023 | gpio_free(host->rstout); | |
1024 | probe_err_3a: | |
1025 | gpio_free(host->rst); | |
1026 | probe_err_3: | |
1027 | iounmap(host->dev_base); | |
1028 | probe_err_2: | |
1029 | kfree(host); | |
1030 | probe_err: | |
1031 | return err; | |
1032 | } | |
1033 | ||
1034 | static int mg_remove(struct platform_device *plat_dev) | |
1035 | { | |
1036 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
1037 | struct mg_host *host = prv_data->host; | |
1038 | int err = 0; | |
1039 | ||
1040 | /* delete timer */ | |
1041 | del_timer_sync(&host->timer); | |
1042 | ||
1043 | /* remove disk */ | |
1044 | if (host->gd) { | |
1045 | del_gendisk(host->gd); | |
1046 | put_disk(host->gd); | |
1047 | } | |
1048 | /* remove queue */ | |
1049 | if (host->breq) | |
1050 | blk_cleanup_queue(host->breq); | |
1051 | ||
1052 | /* unregister blk device */ | |
1053 | unregister_blkdev(host->major, MG_DISK_NAME); | |
1054 | ||
1055 | /* free irq */ | |
1056 | if (!prv_data->use_polling) | |
1057 | free_irq(host->irq, host); | |
1058 | ||
1059 | /* free reset-out pin */ | |
1060 | if (prv_data->dev_attr != MG_BOOT_DEV) | |
1061 | gpio_free(host->rstout); | |
1062 | ||
1063 | /* free rst pin */ | |
1064 | if (host->rst) | |
1065 | gpio_free(host->rst); | |
1066 | ||
1067 | /* unmap io */ | |
1068 | if (host->dev_base) | |
1069 | iounmap(host->dev_base); | |
1070 | ||
1071 | /* free mg_host */ | |
1072 | kfree(host); | |
1073 | ||
1074 | return err; | |
1075 | } | |
1076 | ||
1077 | static struct platform_driver mg_disk_driver = { | |
1078 | .probe = mg_probe, | |
1079 | .remove = mg_remove, | |
3fbed4c6 K |
1080 | .driver = { |
1081 | .name = MG_DEV_NAME, | |
156ffcb4 | 1082 | .pm = &mg_pm, |
3fbed4c6 K |
1083 | } |
1084 | }; | |
1085 | ||
1086 | /**************************************************************************** | |
1087 | * | |
1088 | * Module stuff | |
1089 | * | |
1090 | ****************************************************************************/ | |
1091 | ||
1092 | static int __init mg_init(void) | |
1093 | { | |
1094 | printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n"); | |
1095 | return platform_driver_register(&mg_disk_driver); | |
1096 | } | |
1097 | ||
1098 | static void __exit mg_exit(void) | |
1099 | { | |
1100 | printk(KERN_INFO "mflash driver : bye bye\n"); | |
1101 | platform_driver_unregister(&mg_disk_driver); | |
1102 | } | |
1103 | ||
1104 | module_init(mg_init); | |
1105 | module_exit(mg_exit); | |
1106 | ||
1107 | MODULE_LICENSE("GPL"); | |
1108 | MODULE_AUTHOR("unsik Kim <donari75@gmail.com>"); | |
1109 | MODULE_DESCRIPTION("mGine m[g]flash device driver"); |