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> | |
5ced504b | 25 | #include <linux/mg_disk.h> |
3fbed4c6 K |
26 | |
27 | #define MG_RES_SEC (CONFIG_MG_DISK_RES << 1) | |
28 | ||
eec94620 TH |
29 | /* name for block device */ |
30 | #define MG_DISK_NAME "mgd" | |
eec94620 TH |
31 | |
32 | #define MG_DISK_MAJ 0 | |
33 | #define MG_DISK_MAX_PART 16 | |
34 | #define MG_SECTOR_SIZE 512 | |
35 | #define MG_MAX_SECTS 256 | |
36 | ||
37 | /* Register offsets */ | |
38 | #define MG_BUFF_OFFSET 0x8000 | |
39 | #define MG_STORAGE_BUFFER_SIZE 0x200 | |
40 | #define MG_REG_OFFSET 0xC000 | |
41 | #define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */ | |
42 | #define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */ | |
43 | #define MG_REG_SECT_CNT (MG_REG_OFFSET + 4) | |
44 | #define MG_REG_SECT_NUM (MG_REG_OFFSET + 6) | |
45 | #define MG_REG_CYL_LOW (MG_REG_OFFSET + 8) | |
46 | #define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA) | |
47 | #define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC) | |
48 | #define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */ | |
49 | #define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */ | |
50 | #define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10) | |
51 | #define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12) | |
52 | ||
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 | ||
480 | static void mg_read(struct request *req) | |
481 | { | |
a03bb5a3 | 482 | u32 j; |
3fbed4c6 K |
483 | struct mg_host *host = req->rq_disk->private_data; |
484 | ||
83096ebf TH |
485 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
486 | MG_CMD_RD, NULL) != MG_ERR_NONE) | |
3fbed4c6 K |
487 | mg_bad_rw_intr(host); |
488 | ||
489 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", | |
83096ebf | 490 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
a03bb5a3 TH |
491 | |
492 | do { | |
493 | u16 *buff = (u16 *)req->buffer; | |
3fbed4c6 | 494 | |
f68adec3 BZ |
495 | if (mg_wait(host, ATA_DRQ, |
496 | MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) { | |
3fbed4c6 K |
497 | mg_bad_rw_intr(host); |
498 | return; | |
499 | } | |
a03bb5a3 TH |
500 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
501 | *buff++ = inw((unsigned long)host->dev_base + | |
502 | MG_BUFF_OFFSET + (j << 1)); | |
3fbed4c6 K |
503 | |
504 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + | |
505 | MG_REG_COMMAND); | |
5b36ad60 | 506 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
507 | } |
508 | ||
509 | static void mg_write(struct request *req) | |
510 | { | |
a03bb5a3 | 511 | u32 j; |
3fbed4c6 K |
512 | struct mg_host *host = req->rq_disk->private_data; |
513 | ||
83096ebf TH |
514 | if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req), |
515 | MG_CMD_WR, NULL) != MG_ERR_NONE) { | |
3fbed4c6 K |
516 | mg_bad_rw_intr(host); |
517 | return; | |
518 | } | |
519 | ||
3fbed4c6 | 520 | MG_DBG("requested %d sects (from %ld), buffer=0x%p\n", |
83096ebf | 521 | blk_rq_sectors(req), blk_rq_pos(req), req->buffer); |
a03bb5a3 TH |
522 | |
523 | do { | |
524 | u16 *buff = (u16 *)req->buffer; | |
525 | ||
f68adec3 | 526 | if (mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) { |
3fbed4c6 K |
527 | mg_bad_rw_intr(host); |
528 | return; | |
529 | } | |
a03bb5a3 TH |
530 | for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) |
531 | outw(*buff++, (unsigned long)host->dev_base + | |
532 | MG_BUFF_OFFSET + (j << 1)); | |
3fbed4c6 K |
533 | |
534 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + | |
535 | MG_REG_COMMAND); | |
5b36ad60 | 536 | } while (mg_end_request(host, 0, MG_SECTOR_SIZE)); |
3fbed4c6 K |
537 | } |
538 | ||
539 | static void mg_read_intr(struct mg_host *host) | |
540 | { | |
5b36ad60 | 541 | struct request *req = host->req; |
3fbed4c6 | 542 | u32 i; |
a03bb5a3 | 543 | u16 *buff; |
3fbed4c6 K |
544 | |
545 | /* check status */ | |
546 | do { | |
547 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 548 | if (i & ATA_BUSY) |
3fbed4c6 K |
549 | break; |
550 | if (!MG_READY_OK(i)) | |
551 | break; | |
f68adec3 | 552 | if (i & ATA_DRQ) |
3fbed4c6 K |
553 | goto ok_to_read; |
554 | } while (0); | |
555 | mg_dump_status("mg_read_intr", i, host); | |
556 | mg_bad_rw_intr(host); | |
557 | mg_request(host->breq); | |
558 | return; | |
559 | ||
560 | ok_to_read: | |
561 | /* get current segment of request */ | |
a03bb5a3 | 562 | buff = (u16 *)req->buffer; |
3fbed4c6 K |
563 | |
564 | /* read 1 sector */ | |
a03bb5a3 TH |
565 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) |
566 | *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET + | |
567 | (i << 1)); | |
3fbed4c6 | 568 | |
3fbed4c6 | 569 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", |
83096ebf | 570 | blk_rq_pos(req), blk_rq_sectors(req) - 1, req->buffer); |
3fbed4c6 | 571 | |
3fbed4c6 K |
572 | /* send read confirm */ |
573 | outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
574 | ||
5b36ad60 | 575 | if (mg_end_request(host, 0, MG_SECTOR_SIZE)) { |
a03bb5a3 TH |
576 | /* set handler if read remains */ |
577 | host->mg_do_intr = mg_read_intr; | |
578 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
579 | } else /* goto next request */ | |
3fbed4c6 K |
580 | mg_request(host->breq); |
581 | } | |
582 | ||
583 | static void mg_write_intr(struct mg_host *host) | |
584 | { | |
5b36ad60 | 585 | struct request *req = host->req; |
3fbed4c6 K |
586 | u32 i, j; |
587 | u16 *buff; | |
a03bb5a3 | 588 | bool rem; |
3fbed4c6 | 589 | |
3fbed4c6 K |
590 | /* check status */ |
591 | do { | |
592 | i = inb((unsigned long)host->dev_base + MG_REG_STATUS); | |
f68adec3 | 593 | if (i & ATA_BUSY) |
3fbed4c6 K |
594 | break; |
595 | if (!MG_READY_OK(i)) | |
596 | break; | |
83096ebf | 597 | if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ)) |
3fbed4c6 K |
598 | goto ok_to_write; |
599 | } while (0); | |
600 | mg_dump_status("mg_write_intr", i, host); | |
601 | mg_bad_rw_intr(host); | |
602 | mg_request(host->breq); | |
603 | return; | |
604 | ||
605 | ok_to_write: | |
5b36ad60 | 606 | if ((rem = mg_end_request(host, 0, MG_SECTOR_SIZE))) { |
a03bb5a3 | 607 | /* write 1 sector and set handler if remains */ |
3fbed4c6 K |
608 | buff = (u16 *)req->buffer; |
609 | for (j = 0; j < MG_STORAGE_BUFFER_SIZE >> 1; j++) { | |
610 | outw(*buff, (unsigned long)host->dev_base + | |
611 | MG_BUFF_OFFSET + (j << 1)); | |
612 | buff++; | |
613 | } | |
614 | MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n", | |
83096ebf | 615 | blk_rq_pos(req), blk_rq_sectors(req), req->buffer); |
3fbed4c6 K |
616 | host->mg_do_intr = mg_write_intr; |
617 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
618 | } | |
619 | ||
620 | /* send write confirm */ | |
621 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
622 | ||
a03bb5a3 | 623 | if (!rem) |
3fbed4c6 K |
624 | mg_request(host->breq); |
625 | } | |
626 | ||
627 | void mg_times_out(unsigned long data) | |
628 | { | |
629 | struct mg_host *host = (struct mg_host *)data; | |
630 | char *name; | |
3fbed4c6 | 631 | |
ac2ff946 TH |
632 | spin_lock_irq(&host->lock); |
633 | ||
5b36ad60 | 634 | if (!host->req) |
ac2ff946 | 635 | goto out_unlock; |
3fbed4c6 K |
636 | |
637 | host->mg_do_intr = NULL; | |
638 | ||
5b36ad60 | 639 | name = host->req->rq_disk->disk_name; |
3fbed4c6 K |
640 | printk(KERN_DEBUG "%s: timeout\n", name); |
641 | ||
642 | host->error = MG_ERR_TIMEOUT; | |
643 | mg_bad_rw_intr(host); | |
644 | ||
ac2ff946 | 645 | out_unlock: |
5b36ad60 | 646 | mg_request(host->breq); |
ac2ff946 | 647 | spin_unlock_irq(&host->lock); |
3fbed4c6 K |
648 | } |
649 | ||
650 | static void mg_request_poll(struct request_queue *q) | |
651 | { | |
5b36ad60 | 652 | struct mg_host *host = q->queuedata; |
3fbed4c6 | 653 | |
5b36ad60 TH |
654 | while (1) { |
655 | if (!host->req) { | |
9934c8c0 TH |
656 | host->req = blk_fetch_request(q); |
657 | if (!host->req) | |
5b36ad60 TH |
658 | break; |
659 | } | |
9a8d23d8 | 660 | |
5b36ad60 TH |
661 | if (unlikely(!blk_fs_request(host->req))) { |
662 | mg_end_request_cur(host, -EIO); | |
9a8d23d8 | 663 | continue; |
3fbed4c6 | 664 | } |
9a8d23d8 | 665 | |
5b36ad60 TH |
666 | if (rq_data_dir(host->req) == READ) |
667 | mg_read(host->req); | |
9a8d23d8 | 668 | else |
5b36ad60 | 669 | mg_write(host->req); |
3fbed4c6 K |
670 | } |
671 | } | |
672 | ||
673 | static unsigned int mg_issue_req(struct request *req, | |
674 | struct mg_host *host, | |
675 | unsigned int sect_num, | |
676 | unsigned int sect_cnt) | |
677 | { | |
678 | u16 *buff; | |
679 | u32 i; | |
680 | ||
681 | switch (rq_data_dir(req)) { | |
682 | case READ: | |
683 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_RD, &mg_read_intr) | |
684 | != MG_ERR_NONE) { | |
685 | mg_bad_rw_intr(host); | |
686 | return host->error; | |
687 | } | |
688 | break; | |
689 | case WRITE: | |
690 | /* TODO : handler */ | |
f68adec3 | 691 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
692 | if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr) |
693 | != MG_ERR_NONE) { | |
694 | mg_bad_rw_intr(host); | |
695 | return host->error; | |
696 | } | |
697 | del_timer(&host->timer); | |
f68adec3 BZ |
698 | mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ); |
699 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); | |
3fbed4c6 K |
700 | if (host->error) { |
701 | mg_bad_rw_intr(host); | |
702 | return host->error; | |
703 | } | |
704 | buff = (u16 *)req->buffer; | |
705 | for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) { | |
706 | outw(*buff, (unsigned long)host->dev_base + | |
707 | MG_BUFF_OFFSET + (i << 1)); | |
708 | buff++; | |
709 | } | |
710 | mod_timer(&host->timer, jiffies + 3 * HZ); | |
711 | outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + | |
712 | MG_REG_COMMAND); | |
713 | break; | |
3fbed4c6 K |
714 | } |
715 | return MG_ERR_NONE; | |
716 | } | |
717 | ||
718 | /* This function also called from IRQ context */ | |
719 | static void mg_request(struct request_queue *q) | |
720 | { | |
5b36ad60 | 721 | struct mg_host *host = q->queuedata; |
3fbed4c6 | 722 | struct request *req; |
3fbed4c6 K |
723 | u32 sect_num, sect_cnt; |
724 | ||
725 | while (1) { | |
5b36ad60 | 726 | if (!host->req) { |
9934c8c0 TH |
727 | host->req = blk_fetch_request(q); |
728 | if (!host->req) | |
5b36ad60 TH |
729 | break; |
730 | } | |
731 | req = host->req; | |
3fbed4c6 K |
732 | |
733 | /* check unwanted request call */ | |
734 | if (host->mg_do_intr) | |
735 | return; | |
736 | ||
737 | del_timer(&host->timer); | |
738 | ||
83096ebf | 739 | sect_num = blk_rq_pos(req); |
3fbed4c6 | 740 | /* deal whole segments */ |
83096ebf | 741 | sect_cnt = blk_rq_sectors(req); |
3fbed4c6 K |
742 | |
743 | /* sanity check */ | |
744 | if (sect_num >= get_capacity(req->rq_disk) || | |
745 | ((sect_num + sect_cnt) > | |
746 | get_capacity(req->rq_disk))) { | |
747 | printk(KERN_WARNING | |
748 | "%s: bad access: sector=%d, count=%d\n", | |
749 | req->rq_disk->disk_name, | |
750 | sect_num, sect_cnt); | |
5b36ad60 | 751 | mg_end_request_cur(host, -EIO); |
3fbed4c6 K |
752 | continue; |
753 | } | |
754 | ||
9a8d23d8 | 755 | if (unlikely(!blk_fs_request(req))) { |
5b36ad60 | 756 | mg_end_request_cur(host, -EIO); |
9a8d23d8 TH |
757 | continue; |
758 | } | |
3fbed4c6 K |
759 | |
760 | if (!mg_issue_req(req, host, sect_num, sect_cnt)) | |
761 | return; | |
762 | } | |
763 | } | |
764 | ||
765 | static int mg_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
766 | { | |
767 | struct mg_host *host = bdev->bd_disk->private_data; | |
768 | ||
769 | geo->cylinders = (unsigned short)host->cyls; | |
770 | geo->heads = (unsigned char)host->heads; | |
771 | geo->sectors = (unsigned char)host->sectors; | |
772 | return 0; | |
773 | } | |
774 | ||
775 | static struct block_device_operations mg_disk_ops = { | |
776 | .getgeo = mg_getgeo | |
777 | }; | |
778 | ||
779 | static int mg_suspend(struct platform_device *plat_dev, pm_message_t state) | |
780 | { | |
781 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
782 | struct mg_host *host = prv_data->host; | |
783 | ||
784 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
785 | return -EIO; | |
786 | ||
787 | if (!prv_data->use_polling) | |
f68adec3 | 788 | outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
789 | |
790 | outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
791 | /* wait until mflash deep sleep */ | |
792 | msleep(1); | |
793 | ||
794 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) { | |
795 | if (!prv_data->use_polling) | |
f68adec3 | 796 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
797 | return -EIO; |
798 | } | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | static int mg_resume(struct platform_device *plat_dev) | |
804 | { | |
805 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
806 | struct mg_host *host = prv_data->host; | |
807 | ||
808 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
809 | return -EIO; | |
810 | ||
811 | outb(MG_CMD_WAKEUP, (unsigned long)host->dev_base + MG_REG_COMMAND); | |
812 | /* wait until mflash wakeup */ | |
813 | msleep(1); | |
814 | ||
815 | if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) | |
816 | return -EIO; | |
817 | ||
818 | if (!prv_data->use_polling) | |
f68adec3 | 819 | outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL); |
3fbed4c6 K |
820 | |
821 | return 0; | |
822 | } | |
823 | ||
824 | static int mg_probe(struct platform_device *plat_dev) | |
825 | { | |
826 | struct mg_host *host; | |
827 | struct resource *rsc; | |
828 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
829 | int err = 0; | |
830 | ||
831 | if (!prv_data) { | |
832 | printk(KERN_ERR "%s:%d fail (no driver_data)\n", | |
833 | __func__, __LINE__); | |
834 | err = -EINVAL; | |
835 | goto probe_err; | |
836 | } | |
837 | ||
838 | /* alloc mg_host */ | |
839 | host = kzalloc(sizeof(struct mg_host), GFP_KERNEL); | |
840 | if (!host) { | |
841 | printk(KERN_ERR "%s:%d fail (no memory for mg_host)\n", | |
842 | __func__, __LINE__); | |
843 | err = -ENOMEM; | |
844 | goto probe_err; | |
845 | } | |
846 | host->major = MG_DISK_MAJ; | |
847 | ||
848 | /* link each other */ | |
849 | prv_data->host = host; | |
850 | host->dev = &plat_dev->dev; | |
851 | ||
852 | /* io remap */ | |
853 | rsc = platform_get_resource(plat_dev, IORESOURCE_MEM, 0); | |
854 | if (!rsc) { | |
855 | printk(KERN_ERR "%s:%d platform_get_resource fail\n", | |
856 | __func__, __LINE__); | |
857 | err = -EINVAL; | |
858 | goto probe_err_2; | |
859 | } | |
860 | host->dev_base = ioremap(rsc->start , rsc->end + 1); | |
861 | if (!host->dev_base) { | |
862 | printk(KERN_ERR "%s:%d ioremap fail\n", | |
863 | __func__, __LINE__); | |
864 | err = -EIO; | |
865 | goto probe_err_2; | |
866 | } | |
867 | MG_DBG("dev_base = 0x%x\n", (u32)host->dev_base); | |
868 | ||
869 | /* get reset pin */ | |
870 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
871 | MG_RST_PIN); | |
872 | if (!rsc) { | |
873 | printk(KERN_ERR "%s:%d get reset pin fail\n", | |
874 | __func__, __LINE__); | |
875 | err = -EIO; | |
876 | goto probe_err_3; | |
877 | } | |
878 | host->rst = rsc->start; | |
879 | ||
880 | /* init rst pin */ | |
881 | err = gpio_request(host->rst, MG_RST_PIN); | |
882 | if (err) | |
883 | goto probe_err_3; | |
884 | gpio_direction_output(host->rst, 1); | |
885 | ||
886 | /* reset out pin */ | |
887 | if (!(prv_data->dev_attr & MG_DEV_MASK)) | |
888 | goto probe_err_3a; | |
889 | ||
890 | if (prv_data->dev_attr != MG_BOOT_DEV) { | |
891 | rsc = platform_get_resource_byname(plat_dev, IORESOURCE_IO, | |
892 | MG_RSTOUT_PIN); | |
893 | if (!rsc) { | |
894 | printk(KERN_ERR "%s:%d get reset-out pin fail\n", | |
895 | __func__, __LINE__); | |
896 | err = -EIO; | |
897 | goto probe_err_3a; | |
898 | } | |
899 | host->rstout = rsc->start; | |
900 | err = gpio_request(host->rstout, MG_RSTOUT_PIN); | |
901 | if (err) | |
902 | goto probe_err_3a; | |
903 | gpio_direction_input(host->rstout); | |
904 | } | |
905 | ||
906 | /* disk reset */ | |
907 | if (prv_data->dev_attr == MG_STORAGE_DEV) { | |
908 | /* If POR seq. not yet finised, wait */ | |
909 | err = mg_wait_rstout(host->rstout, MG_TMAX_RSTOUT); | |
910 | if (err) | |
911 | goto probe_err_3b; | |
912 | err = mg_disk_init(host); | |
913 | if (err) { | |
914 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
915 | __func__, __LINE__, err); | |
916 | err = -EIO; | |
917 | goto probe_err_3b; | |
918 | } | |
919 | } | |
920 | ||
921 | /* get irq resource */ | |
922 | if (!prv_data->use_polling) { | |
923 | host->irq = platform_get_irq(plat_dev, 0); | |
924 | if (host->irq == -ENXIO) { | |
925 | err = host->irq; | |
926 | goto probe_err_3b; | |
927 | } | |
928 | err = request_irq(host->irq, mg_irq, | |
929 | IRQF_DISABLED | IRQF_TRIGGER_RISING, | |
930 | MG_DEV_NAME, host); | |
931 | if (err) { | |
932 | printk(KERN_ERR "%s:%d fail (request_irq err=%d)\n", | |
933 | __func__, __LINE__, err); | |
934 | goto probe_err_3b; | |
935 | } | |
936 | ||
937 | } | |
938 | ||
939 | /* get disk id */ | |
940 | err = mg_get_disk_id(host); | |
941 | if (err) { | |
942 | printk(KERN_ERR "%s:%d fail (err code : %d)\n", | |
943 | __func__, __LINE__, err); | |
944 | err = -EIO; | |
945 | goto probe_err_4; | |
946 | } | |
947 | ||
948 | err = register_blkdev(host->major, MG_DISK_NAME); | |
949 | if (err < 0) { | |
950 | printk(KERN_ERR "%s:%d register_blkdev fail (err code : %d)\n", | |
951 | __func__, __LINE__, err); | |
952 | goto probe_err_4; | |
953 | } | |
954 | if (!host->major) | |
955 | host->major = err; | |
956 | ||
957 | spin_lock_init(&host->lock); | |
958 | ||
959 | if (prv_data->use_polling) | |
960 | host->breq = blk_init_queue(mg_request_poll, &host->lock); | |
961 | else | |
962 | host->breq = blk_init_queue(mg_request, &host->lock); | |
963 | ||
964 | if (!host->breq) { | |
965 | err = -ENOMEM; | |
966 | printk(KERN_ERR "%s:%d (blk_init_queue) fail\n", | |
967 | __func__, __LINE__); | |
968 | goto probe_err_5; | |
969 | } | |
5b36ad60 | 970 | host->breq->queuedata = host; |
3fbed4c6 K |
971 | |
972 | /* mflash is random device, thanx for the noop */ | |
973 | elevator_exit(host->breq->elevator); | |
974 | err = elevator_init(host->breq, "noop"); | |
975 | if (err) { | |
976 | printk(KERN_ERR "%s:%d (elevator_init) fail\n", | |
977 | __func__, __LINE__); | |
978 | goto probe_err_6; | |
979 | } | |
980 | blk_queue_max_sectors(host->breq, MG_MAX_SECTS); | |
e1defc4f | 981 | blk_queue_logical_block_size(host->breq, MG_SECTOR_SIZE); |
3fbed4c6 K |
982 | |
983 | init_timer(&host->timer); | |
984 | host->timer.function = mg_times_out; | |
985 | host->timer.data = (unsigned long)host; | |
986 | ||
987 | host->gd = alloc_disk(MG_DISK_MAX_PART); | |
988 | if (!host->gd) { | |
989 | printk(KERN_ERR "%s:%d (alloc_disk) fail\n", | |
990 | __func__, __LINE__); | |
991 | err = -ENOMEM; | |
992 | goto probe_err_7; | |
993 | } | |
994 | host->gd->major = host->major; | |
995 | host->gd->first_minor = 0; | |
996 | host->gd->fops = &mg_disk_ops; | |
997 | host->gd->queue = host->breq; | |
998 | host->gd->private_data = host; | |
999 | sprintf(host->gd->disk_name, MG_DISK_NAME"a"); | |
1000 | ||
1001 | set_capacity(host->gd, host->n_sectors); | |
1002 | ||
1003 | add_disk(host->gd); | |
1004 | ||
1005 | return err; | |
1006 | ||
1007 | probe_err_7: | |
1008 | del_timer_sync(&host->timer); | |
1009 | probe_err_6: | |
1010 | blk_cleanup_queue(host->breq); | |
1011 | probe_err_5: | |
1012 | unregister_blkdev(MG_DISK_MAJ, MG_DISK_NAME); | |
1013 | probe_err_4: | |
1014 | if (!prv_data->use_polling) | |
1015 | free_irq(host->irq, host); | |
1016 | probe_err_3b: | |
1017 | gpio_free(host->rstout); | |
1018 | probe_err_3a: | |
1019 | gpio_free(host->rst); | |
1020 | probe_err_3: | |
1021 | iounmap(host->dev_base); | |
1022 | probe_err_2: | |
1023 | kfree(host); | |
1024 | probe_err: | |
1025 | return err; | |
1026 | } | |
1027 | ||
1028 | static int mg_remove(struct platform_device *plat_dev) | |
1029 | { | |
1030 | struct mg_drv_data *prv_data = plat_dev->dev.platform_data; | |
1031 | struct mg_host *host = prv_data->host; | |
1032 | int err = 0; | |
1033 | ||
1034 | /* delete timer */ | |
1035 | del_timer_sync(&host->timer); | |
1036 | ||
1037 | /* remove disk */ | |
1038 | if (host->gd) { | |
1039 | del_gendisk(host->gd); | |
1040 | put_disk(host->gd); | |
1041 | } | |
1042 | /* remove queue */ | |
1043 | if (host->breq) | |
1044 | blk_cleanup_queue(host->breq); | |
1045 | ||
1046 | /* unregister blk device */ | |
1047 | unregister_blkdev(host->major, MG_DISK_NAME); | |
1048 | ||
1049 | /* free irq */ | |
1050 | if (!prv_data->use_polling) | |
1051 | free_irq(host->irq, host); | |
1052 | ||
1053 | /* free reset-out pin */ | |
1054 | if (prv_data->dev_attr != MG_BOOT_DEV) | |
1055 | gpio_free(host->rstout); | |
1056 | ||
1057 | /* free rst pin */ | |
1058 | if (host->rst) | |
1059 | gpio_free(host->rst); | |
1060 | ||
1061 | /* unmap io */ | |
1062 | if (host->dev_base) | |
1063 | iounmap(host->dev_base); | |
1064 | ||
1065 | /* free mg_host */ | |
1066 | kfree(host); | |
1067 | ||
1068 | return err; | |
1069 | } | |
1070 | ||
1071 | static struct platform_driver mg_disk_driver = { | |
1072 | .probe = mg_probe, | |
1073 | .remove = mg_remove, | |
1074 | .suspend = mg_suspend, | |
1075 | .resume = mg_resume, | |
1076 | .driver = { | |
1077 | .name = MG_DEV_NAME, | |
1078 | .owner = THIS_MODULE, | |
1079 | } | |
1080 | }; | |
1081 | ||
1082 | /**************************************************************************** | |
1083 | * | |
1084 | * Module stuff | |
1085 | * | |
1086 | ****************************************************************************/ | |
1087 | ||
1088 | static int __init mg_init(void) | |
1089 | { | |
1090 | printk(KERN_INFO "mGine mflash driver, (c) 2008 mGine Co.\n"); | |
1091 | return platform_driver_register(&mg_disk_driver); | |
1092 | } | |
1093 | ||
1094 | static void __exit mg_exit(void) | |
1095 | { | |
1096 | printk(KERN_INFO "mflash driver : bye bye\n"); | |
1097 | platform_driver_unregister(&mg_disk_driver); | |
1098 | } | |
1099 | ||
1100 | module_init(mg_init); | |
1101 | module_exit(mg_exit); | |
1102 | ||
1103 | MODULE_LICENSE("GPL"); | |
1104 | MODULE_AUTHOR("unsik Kim <donari75@gmail.com>"); | |
1105 | MODULE_DESCRIPTION("mGine m[g]flash device driver"); |