2 * drivers/block/mg_disk.c
4 * Support for the mGine m[g]flash IO mode.
7 * (c) 2008 mGine Co.,LTD
8 * (c) 2008 unsik Kim <donari75@gmail.com>
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.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
18 #include <linux/blkdev.h>
19 #include <linux/hdreg.h>
20 #include <linux/ata.h>
21 #include <linux/interrupt.h>
22 #include <linux/delay.h>
23 #include <linux/platform_device.h>
24 #include <linux/gpio.h>
25 #include <linux/mg_disk.h>
27 #define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)
29 /* name for block device */
30 #define MG_DISK_NAME "mgd"
33 #define MG_DISK_MAX_PART 16
34 #define MG_SECTOR_SIZE 512
35 #define MG_MAX_SECTS 256
37 /* Register offsets */
38 #define MG_BUFF_OFFSET 0x8000
39 #define MG_REG_OFFSET 0xC000
40 #define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */
41 #define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */
42 #define MG_REG_SECT_CNT (MG_REG_OFFSET + 4)
43 #define MG_REG_SECT_NUM (MG_REG_OFFSET + 6)
44 #define MG_REG_CYL_LOW (MG_REG_OFFSET + 8)
45 #define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA)
46 #define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC)
47 #define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */
48 #define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */
49 #define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10)
50 #define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12)
53 #define MG_STAT_READY (ATA_DRDY | ATA_DSC)
54 #define MG_READY_OK(s) (((s) & (MG_STAT_READY | (ATA_BUSY | ATA_DF | \
55 ATA_ERR))) == MG_STAT_READY)
57 /* error code for others */
59 #define MG_ERR_TIMEOUT 0x100
60 #define MG_ERR_INIT_STAT 0x101
61 #define MG_ERR_TRANSLATION 0x102
62 #define MG_ERR_CTRL_RST 0x103
63 #define MG_ERR_INV_STAT 0x104
64 #define MG_ERR_RSTOUT 0x105
66 #define MG_MAX_ERRORS 6 /* Max read/write errors */
69 #define MG_CMD_RD 0x20
70 #define MG_CMD_WR 0x30
71 #define MG_CMD_SLEEP 0x99
72 #define MG_CMD_WAKEUP 0xC3
73 #define MG_CMD_ID 0xEC
74 #define MG_CMD_WR_CONF 0x3C
75 #define MG_CMD_RD_CONF 0x40
78 #define MG_OP_CASCADE (1 << 0)
79 #define MG_OP_CASCADE_SYNC_RD (1 << 1)
80 #define MG_OP_CASCADE_SYNC_WR (1 << 2)
81 #define MG_OP_INTERLEAVE (1 << 3)
84 #define MG_BURST_LAT_4 (3 << 4)
85 #define MG_BURST_LAT_5 (4 << 4)
86 #define MG_BURST_LAT_6 (5 << 4)
87 #define MG_BURST_LAT_7 (6 << 4)
88 #define MG_BURST_LAT_8 (7 << 4)
89 #define MG_BURST_LEN_4 (1 << 1)
90 #define MG_BURST_LEN_8 (2 << 1)
91 #define MG_BURST_LEN_16 (3 << 1)
92 #define MG_BURST_LEN_32 (4 << 1)
93 #define MG_BURST_LEN_CONT (0 << 1)
95 /* timeout value (unit: ms) */
96 #define MG_TMAX_CONF_TO_CMD 1
97 #define MG_TMAX_WAIT_RD_DRQ 10
98 #define MG_TMAX_WAIT_WR_DRQ 500
99 #define MG_TMAX_RST_TO_BUSY 10
100 #define MG_TMAX_HDRST_TO_RDY 500
101 #define MG_TMAX_SWRST_TO_RDY 500
102 #define MG_TMAX_RSTOUT 3000
104 #define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)
106 /* main structure for mflash driver */
110 struct request_queue
*breq
;
115 struct timer_list timer
;
116 void (*mg_do_intr
) (struct mg_host
*);
118 u16 id
[ATA_ID_WORDS
];
126 void __iomem
*dev_base
;
136 * Debugging macro and defines
140 # define MG_DBG(fmt, args...) \
141 printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args)
142 #else /* CONFIG_MG_DEBUG */
143 # define MG_DBG(fmt, args...) do { } while (0)
144 #endif /* CONFIG_MG_DEBUG */
146 static void mg_request(struct request_queue
*);
148 static bool mg_end_request(struct mg_host
*host
, int err
, unsigned int nr_bytes
)
150 if (__blk_end_request(host
->req
, err
, nr_bytes
))
157 static bool mg_end_request_cur(struct mg_host
*host
, int err
)
159 return mg_end_request(host
, err
, blk_rq_cur_bytes(host
->req
));
162 static void mg_dump_status(const char *msg
, unsigned int stat
,
163 struct mg_host
*host
)
165 char *name
= MG_DISK_NAME
;
168 name
= host
->req
->rq_disk
->disk_name
;
170 printk(KERN_ERR
"%s: %s: status=0x%02x { ", name
, msg
, stat
& 0xff);
174 printk("DriveReady ");
176 printk("WriteFault ");
178 printk("SeekComplete ");
180 printk("DataRequest ");
182 printk("CorrectedError ");
186 if ((stat
& ATA_ERR
) == 0) {
189 host
->error
= inb((unsigned long)host
->dev_base
+ MG_REG_ERROR
);
190 printk(KERN_ERR
"%s: %s: error=0x%02x { ", name
, msg
,
192 if (host
->error
& ATA_BBK
)
193 printk("BadSector ");
194 if (host
->error
& ATA_UNC
)
195 printk("UncorrectableError ");
196 if (host
->error
& ATA_IDNF
)
197 printk("SectorIdNotFound ");
198 if (host
->error
& ATA_ABORTED
)
199 printk("DriveStatusError ");
200 if (host
->error
& ATA_AMNF
)
201 printk("AddrMarkNotFound ");
203 if (host
->error
& (ATA_BBK
| ATA_UNC
| ATA_IDNF
| ATA_AMNF
)) {
205 printk(", sector=%u",
206 (unsigned int)blk_rq_pos(host
->req
));
212 static unsigned int mg_wait(struct mg_host
*host
, u32 expect
, u32 msec
)
215 unsigned long expire
, cur_jiffies
;
216 struct mg_drv_data
*prv_data
= host
->dev
->platform_data
;
218 host
->error
= MG_ERR_NONE
;
219 expire
= jiffies
+ msecs_to_jiffies(msec
);
221 /* These 2 times dummy status read prevents reading invalid
222 * status. A very little time (3 times of mflash operating clk)
223 * is required for busy bit is set. Use dummy read instead of
224 * busy wait, because mflash's PLL is machine dependent.
226 if (prv_data
->use_polling
) {
227 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
228 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
231 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
234 cur_jiffies
= jiffies
;
235 if (status
& ATA_BUSY
) {
236 if (expect
== ATA_BUSY
)
239 /* Check the error condition! */
240 if (status
& ATA_ERR
) {
241 mg_dump_status("mg_wait", status
, host
);
245 if (expect
== MG_STAT_READY
)
246 if (MG_READY_OK(status
))
249 if (expect
== ATA_DRQ
)
250 if (status
& ATA_DRQ
)
254 mg_dump_status("not ready", status
, host
);
255 return MG_ERR_INV_STAT
;
258 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
259 } while (time_before(cur_jiffies
, expire
));
261 if (time_after_eq(cur_jiffies
, expire
) && msec
)
262 host
->error
= MG_ERR_TIMEOUT
;
267 static unsigned int mg_wait_rstout(u32 rstout
, u32 msec
)
269 unsigned long expire
;
271 expire
= jiffies
+ msecs_to_jiffies(msec
);
272 while (time_before(jiffies
, expire
)) {
273 if (gpio_get_value(rstout
) == 1)
278 return MG_ERR_RSTOUT
;
281 static void mg_unexpected_intr(struct mg_host
*host
)
283 u32 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
285 mg_dump_status("mg_unexpected_intr", status
, host
);
288 static irqreturn_t
mg_irq(int irq
, void *dev_id
)
290 struct mg_host
*host
= dev_id
;
291 void (*handler
)(struct mg_host
*) = host
->mg_do_intr
;
293 spin_lock(&host
->lock
);
295 host
->mg_do_intr
= NULL
;
296 del_timer(&host
->timer
);
298 handler
= mg_unexpected_intr
;
301 spin_unlock(&host
->lock
);
306 /* local copy of ata_id_string() */
307 static void mg_id_string(const u16
*id
, unsigned char *s
,
308 unsigned int ofs
, unsigned int len
)
328 /* local copy of ata_id_c_string() */
329 static void mg_id_c_string(const u16
*id
, unsigned char *s
,
330 unsigned int ofs
, unsigned int len
)
334 mg_id_string(id
, s
, ofs
, len
- 1);
336 p
= s
+ strnlen(s
, len
- 1);
337 while (p
> s
&& p
[-1] == ' ')
342 static int mg_get_disk_id(struct mg_host
*host
)
346 const u16
*id
= host
->id
;
347 struct mg_drv_data
*prv_data
= host
->dev
->platform_data
;
348 char fwrev
[ATA_ID_FW_REV_LEN
+ 1];
349 char model
[ATA_ID_PROD_LEN
+ 1];
350 char serial
[ATA_ID_SERNO_LEN
+ 1];
352 if (!prv_data
->use_polling
)
353 outb(ATA_NIEN
, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
355 outb(MG_CMD_ID
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
356 err
= mg_wait(host
, ATA_DRQ
, MG_TMAX_WAIT_RD_DRQ
);
360 for (i
= 0; i
< (MG_SECTOR_SIZE
>> 1); i
++)
361 host
->id
[i
] = le16_to_cpu(inw((unsigned long)host
->dev_base
+
362 MG_BUFF_OFFSET
+ i
* 2));
364 outb(MG_CMD_RD_CONF
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
365 err
= mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
);
369 if ((id
[ATA_ID_FIELD_VALID
] & 1) == 0)
370 return MG_ERR_TRANSLATION
;
372 host
->n_sectors
= ata_id_u32(id
, ATA_ID_LBA_CAPACITY
);
373 host
->cyls
= id
[ATA_ID_CYLS
];
374 host
->heads
= id
[ATA_ID_HEADS
];
375 host
->sectors
= id
[ATA_ID_SECTORS
];
377 if (MG_RES_SEC
&& host
->heads
&& host
->sectors
) {
378 /* modify cyls, n_sectors */
379 host
->cyls
= (host
->n_sectors
- MG_RES_SEC
) /
380 host
->heads
/ host
->sectors
;
381 host
->nres_sectors
= host
->n_sectors
- host
->cyls
*
382 host
->heads
* host
->sectors
;
383 host
->n_sectors
-= host
->nres_sectors
;
386 mg_id_c_string(id
, fwrev
, ATA_ID_FW_REV
, sizeof(fwrev
));
387 mg_id_c_string(id
, model
, ATA_ID_PROD
, sizeof(model
));
388 mg_id_c_string(id
, serial
, ATA_ID_SERNO
, sizeof(serial
));
389 printk(KERN_INFO
"mg_disk: model: %s\n", model
);
390 printk(KERN_INFO
"mg_disk: firm: %.8s\n", fwrev
);
391 printk(KERN_INFO
"mg_disk: serial: %s\n", serial
);
392 printk(KERN_INFO
"mg_disk: %d + reserved %d sectors\n",
393 host
->n_sectors
, host
->nres_sectors
);
395 if (!prv_data
->use_polling
)
396 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
402 static int mg_disk_init(struct mg_host
*host
)
404 struct mg_drv_data
*prv_data
= host
->dev
->platform_data
;
409 gpio_set_value(host
->rst
, 0);
410 err
= mg_wait(host
, ATA_BUSY
, MG_TMAX_RST_TO_BUSY
);
415 gpio_set_value(host
->rst
, 1);
416 err
= mg_wait(host
, MG_STAT_READY
, MG_TMAX_HDRST_TO_RDY
);
421 outb(ATA_SRST
| (prv_data
->use_polling
? ATA_NIEN
: 0),
422 (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
423 err
= mg_wait(host
, ATA_BUSY
, MG_TMAX_RST_TO_BUSY
);
428 outb(prv_data
->use_polling
? ATA_NIEN
: 0,
429 (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
430 err
= mg_wait(host
, MG_STAT_READY
, MG_TMAX_SWRST_TO_RDY
);
434 init_status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
) & 0xf;
436 if (init_status
== 0xf)
437 return MG_ERR_INIT_STAT
;
442 static void mg_bad_rw_intr(struct mg_host
*host
)
445 if (++host
->req
->errors
>= MG_MAX_ERRORS
||
446 host
->error
== MG_ERR_TIMEOUT
)
447 mg_end_request_cur(host
, -EIO
);
450 static unsigned int mg_out(struct mg_host
*host
,
451 unsigned int sect_num
,
452 unsigned int sect_cnt
,
454 void (*intr_addr
)(struct mg_host
*))
456 struct mg_drv_data
*prv_data
= host
->dev
->platform_data
;
458 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
461 if (!prv_data
->use_polling
) {
462 host
->mg_do_intr
= intr_addr
;
463 mod_timer(&host
->timer
, jiffies
+ 3 * HZ
);
466 sect_num
+= MG_RES_SEC
;
467 outb((u8
)sect_cnt
, (unsigned long)host
->dev_base
+ MG_REG_SECT_CNT
);
468 outb((u8
)sect_num
, (unsigned long)host
->dev_base
+ MG_REG_SECT_NUM
);
469 outb((u8
)(sect_num
>> 8), (unsigned long)host
->dev_base
+
471 outb((u8
)(sect_num
>> 16), (unsigned long)host
->dev_base
+
473 outb((u8
)((sect_num
>> 24) | ATA_LBA
| ATA_DEVICE_OBS
),
474 (unsigned long)host
->dev_base
+ MG_REG_DRV_HEAD
);
475 outb(cmd
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
479 static void mg_read_one(struct mg_host
*host
, struct request
*req
)
481 u16
*buff
= (u16
*)req
->buffer
;
484 for (i
= 0; i
< MG_SECTOR_SIZE
>> 1; i
++)
485 *buff
++ = inw((unsigned long)host
->dev_base
+ MG_BUFF_OFFSET
+
489 static void mg_read(struct request
*req
)
491 struct mg_host
*host
= req
->rq_disk
->private_data
;
493 if (mg_out(host
, blk_rq_pos(req
), blk_rq_sectors(req
),
494 MG_CMD_RD
, NULL
) != MG_ERR_NONE
)
495 mg_bad_rw_intr(host
);
497 MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
498 blk_rq_sectors(req
), blk_rq_pos(req
), req
->buffer
);
501 if (mg_wait(host
, ATA_DRQ
,
502 MG_TMAX_WAIT_RD_DRQ
) != MG_ERR_NONE
) {
503 mg_bad_rw_intr(host
);
507 mg_read_one(host
, req
);
509 outb(MG_CMD_RD_CONF
, (unsigned long)host
->dev_base
+
511 } while (mg_end_request(host
, 0, MG_SECTOR_SIZE
));
514 static void mg_write_one(struct mg_host
*host
, struct request
*req
)
516 u16
*buff
= (u16
*)req
->buffer
;
519 for (i
= 0; i
< MG_SECTOR_SIZE
>> 1; i
++)
520 outw(*buff
++, (unsigned long)host
->dev_base
+ MG_BUFF_OFFSET
+
524 static void mg_write(struct request
*req
)
526 struct mg_host
*host
= req
->rq_disk
->private_data
;
527 unsigned int rem
= blk_rq_sectors(req
);
529 if (mg_out(host
, blk_rq_pos(req
), rem
,
530 MG_CMD_WR
, NULL
) != MG_ERR_NONE
) {
531 mg_bad_rw_intr(host
);
535 MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
536 rem
, blk_rq_pos(req
), req
->buffer
);
538 if (mg_wait(host
, ATA_DRQ
,
539 MG_TMAX_WAIT_WR_DRQ
) != MG_ERR_NONE
) {
540 mg_bad_rw_intr(host
);
545 mg_write_one(host
, req
);
547 outb(MG_CMD_WR_CONF
, (unsigned long)host
->dev_base
+
551 if (rem
> 1 && mg_wait(host
, ATA_DRQ
,
552 MG_TMAX_WAIT_WR_DRQ
) != MG_ERR_NONE
) {
553 mg_bad_rw_intr(host
);
555 } else if (mg_wait(host
, MG_STAT_READY
,
556 MG_TMAX_WAIT_WR_DRQ
) != MG_ERR_NONE
) {
557 mg_bad_rw_intr(host
);
560 } while (mg_end_request(host
, 0, MG_SECTOR_SIZE
));
563 static void mg_read_intr(struct mg_host
*host
)
565 struct request
*req
= host
->req
;
570 i
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
578 mg_dump_status("mg_read_intr", i
, host
);
579 mg_bad_rw_intr(host
);
580 mg_request(host
->breq
);
584 mg_read_one(host
, req
);
586 MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
587 blk_rq_pos(req
), blk_rq_sectors(req
) - 1, req
->buffer
);
589 /* send read confirm */
590 outb(MG_CMD_RD_CONF
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
592 if (mg_end_request(host
, 0, MG_SECTOR_SIZE
)) {
593 /* set handler if read remains */
594 host
->mg_do_intr
= mg_read_intr
;
595 mod_timer(&host
->timer
, jiffies
+ 3 * HZ
);
596 } else /* goto next request */
597 mg_request(host
->breq
);
600 static void mg_write_intr(struct mg_host
*host
)
602 struct request
*req
= host
->req
;
608 i
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
613 if ((blk_rq_sectors(req
) <= 1) || (i
& ATA_DRQ
))
616 mg_dump_status("mg_write_intr", i
, host
);
617 mg_bad_rw_intr(host
);
618 mg_request(host
->breq
);
622 if ((rem
= mg_end_request(host
, 0, MG_SECTOR_SIZE
))) {
623 /* write 1 sector and set handler if remains */
624 mg_write_one(host
, req
);
625 MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
626 blk_rq_pos(req
), blk_rq_sectors(req
), req
->buffer
);
627 host
->mg_do_intr
= mg_write_intr
;
628 mod_timer(&host
->timer
, jiffies
+ 3 * HZ
);
631 /* send write confirm */
632 outb(MG_CMD_WR_CONF
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
635 mg_request(host
->breq
);
638 void mg_times_out(unsigned long data
)
640 struct mg_host
*host
= (struct mg_host
*)data
;
643 spin_lock_irq(&host
->lock
);
648 host
->mg_do_intr
= NULL
;
650 name
= host
->req
->rq_disk
->disk_name
;
651 printk(KERN_DEBUG
"%s: timeout\n", name
);
653 host
->error
= MG_ERR_TIMEOUT
;
654 mg_bad_rw_intr(host
);
657 mg_request(host
->breq
);
658 spin_unlock_irq(&host
->lock
);
661 static void mg_request_poll(struct request_queue
*q
)
663 struct mg_host
*host
= q
->queuedata
;
667 host
->req
= blk_fetch_request(q
);
672 if (unlikely(!blk_fs_request(host
->req
))) {
673 mg_end_request_cur(host
, -EIO
);
677 if (rq_data_dir(host
->req
) == READ
)
684 static unsigned int mg_issue_req(struct request
*req
,
685 struct mg_host
*host
,
686 unsigned int sect_num
,
687 unsigned int sect_cnt
)
689 switch (rq_data_dir(req
)) {
691 if (mg_out(host
, sect_num
, sect_cnt
, MG_CMD_RD
, &mg_read_intr
)
693 mg_bad_rw_intr(host
);
699 outb(ATA_NIEN
, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
700 if (mg_out(host
, sect_num
, sect_cnt
, MG_CMD_WR
, &mg_write_intr
)
702 mg_bad_rw_intr(host
);
705 del_timer(&host
->timer
);
706 mg_wait(host
, ATA_DRQ
, MG_TMAX_WAIT_WR_DRQ
);
707 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
709 mg_bad_rw_intr(host
);
712 mg_write_one(host
, req
);
713 mod_timer(&host
->timer
, jiffies
+ 3 * HZ
);
714 outb(MG_CMD_WR_CONF
, (unsigned long)host
->dev_base
+
721 /* This function also called from IRQ context */
722 static void mg_request(struct request_queue
*q
)
724 struct mg_host
*host
= q
->queuedata
;
726 u32 sect_num
, sect_cnt
;
730 host
->req
= blk_fetch_request(q
);
736 /* check unwanted request call */
737 if (host
->mg_do_intr
)
740 del_timer(&host
->timer
);
742 sect_num
= blk_rq_pos(req
);
743 /* deal whole segments */
744 sect_cnt
= blk_rq_sectors(req
);
747 if (sect_num
>= get_capacity(req
->rq_disk
) ||
748 ((sect_num
+ sect_cnt
) >
749 get_capacity(req
->rq_disk
))) {
751 "%s: bad access: sector=%d, count=%d\n",
752 req
->rq_disk
->disk_name
,
754 mg_end_request_cur(host
, -EIO
);
758 if (unlikely(!blk_fs_request(req
))) {
759 mg_end_request_cur(host
, -EIO
);
763 if (!mg_issue_req(req
, host
, sect_num
, sect_cnt
))
768 static int mg_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
770 struct mg_host
*host
= bdev
->bd_disk
->private_data
;
772 geo
->cylinders
= (unsigned short)host
->cyls
;
773 geo
->heads
= (unsigned char)host
->heads
;
774 geo
->sectors
= (unsigned char)host
->sectors
;
778 static const struct block_device_operations mg_disk_ops
= {
782 static int mg_suspend(struct platform_device
*plat_dev
, pm_message_t state
)
784 struct mg_drv_data
*prv_data
= plat_dev
->dev
.platform_data
;
785 struct mg_host
*host
= prv_data
->host
;
787 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
790 if (!prv_data
->use_polling
)
791 outb(ATA_NIEN
, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
793 outb(MG_CMD_SLEEP
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
794 /* wait until mflash deep sleep */
797 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
)) {
798 if (!prv_data
->use_polling
)
799 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
806 static int mg_resume(struct platform_device
*plat_dev
)
808 struct mg_drv_data
*prv_data
= plat_dev
->dev
.platform_data
;
809 struct mg_host
*host
= prv_data
->host
;
811 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
814 outb(MG_CMD_WAKEUP
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
815 /* wait until mflash wakeup */
818 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
821 if (!prv_data
->use_polling
)
822 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
827 static int mg_probe(struct platform_device
*plat_dev
)
829 struct mg_host
*host
;
830 struct resource
*rsc
;
831 struct mg_drv_data
*prv_data
= plat_dev
->dev
.platform_data
;
835 printk(KERN_ERR
"%s:%d fail (no driver_data)\n",
842 host
= kzalloc(sizeof(struct mg_host
), GFP_KERNEL
);
844 printk(KERN_ERR
"%s:%d fail (no memory for mg_host)\n",
849 host
->major
= MG_DISK_MAJ
;
851 /* link each other */
852 prv_data
->host
= host
;
853 host
->dev
= &plat_dev
->dev
;
856 rsc
= platform_get_resource(plat_dev
, IORESOURCE_MEM
, 0);
858 printk(KERN_ERR
"%s:%d platform_get_resource fail\n",
863 host
->dev_base
= ioremap(rsc
->start
, resource_size(rsc
));
864 if (!host
->dev_base
) {
865 printk(KERN_ERR
"%s:%d ioremap fail\n",
870 MG_DBG("dev_base = 0x%x\n", (u32
)host
->dev_base
);
873 rsc
= platform_get_resource_byname(plat_dev
, IORESOURCE_IO
,
876 printk(KERN_ERR
"%s:%d get reset pin fail\n",
881 host
->rst
= rsc
->start
;
884 err
= gpio_request(host
->rst
, MG_RST_PIN
);
887 gpio_direction_output(host
->rst
, 1);
890 if (!(prv_data
->dev_attr
& MG_DEV_MASK
))
893 if (prv_data
->dev_attr
!= MG_BOOT_DEV
) {
894 rsc
= platform_get_resource_byname(plat_dev
, IORESOURCE_IO
,
897 printk(KERN_ERR
"%s:%d get reset-out pin fail\n",
902 host
->rstout
= rsc
->start
;
903 err
= gpio_request(host
->rstout
, MG_RSTOUT_PIN
);
906 gpio_direction_input(host
->rstout
);
910 if (prv_data
->dev_attr
== MG_STORAGE_DEV
) {
911 /* If POR seq. not yet finised, wait */
912 err
= mg_wait_rstout(host
->rstout
, MG_TMAX_RSTOUT
);
915 err
= mg_disk_init(host
);
917 printk(KERN_ERR
"%s:%d fail (err code : %d)\n",
918 __func__
, __LINE__
, err
);
924 /* get irq resource */
925 if (!prv_data
->use_polling
) {
926 host
->irq
= platform_get_irq(plat_dev
, 0);
927 if (host
->irq
== -ENXIO
) {
931 err
= request_irq(host
->irq
, mg_irq
,
932 IRQF_DISABLED
| IRQF_TRIGGER_RISING
,
935 printk(KERN_ERR
"%s:%d fail (request_irq err=%d)\n",
936 __func__
, __LINE__
, err
);
943 err
= mg_get_disk_id(host
);
945 printk(KERN_ERR
"%s:%d fail (err code : %d)\n",
946 __func__
, __LINE__
, err
);
951 err
= register_blkdev(host
->major
, MG_DISK_NAME
);
953 printk(KERN_ERR
"%s:%d register_blkdev fail (err code : %d)\n",
954 __func__
, __LINE__
, err
);
960 spin_lock_init(&host
->lock
);
962 if (prv_data
->use_polling
)
963 host
->breq
= blk_init_queue(mg_request_poll
, &host
->lock
);
965 host
->breq
= blk_init_queue(mg_request
, &host
->lock
);
969 printk(KERN_ERR
"%s:%d (blk_init_queue) fail\n",
973 host
->breq
->queuedata
= host
;
975 /* mflash is random device, thanx for the noop */
976 elevator_exit(host
->breq
->elevator
);
977 err
= elevator_init(host
->breq
, "noop");
979 printk(KERN_ERR
"%s:%d (elevator_init) fail\n",
983 blk_queue_max_hw_sectors(host
->breq
, MG_MAX_SECTS
);
984 blk_queue_logical_block_size(host
->breq
, MG_SECTOR_SIZE
);
986 init_timer(&host
->timer
);
987 host
->timer
.function
= mg_times_out
;
988 host
->timer
.data
= (unsigned long)host
;
990 host
->gd
= alloc_disk(MG_DISK_MAX_PART
);
992 printk(KERN_ERR
"%s:%d (alloc_disk) fail\n",
997 host
->gd
->major
= host
->major
;
998 host
->gd
->first_minor
= 0;
999 host
->gd
->fops
= &mg_disk_ops
;
1000 host
->gd
->queue
= host
->breq
;
1001 host
->gd
->private_data
= host
;
1002 sprintf(host
->gd
->disk_name
, MG_DISK_NAME
"a");
1004 set_capacity(host
->gd
, host
->n_sectors
);
1011 del_timer_sync(&host
->timer
);
1013 blk_cleanup_queue(host
->breq
);
1015 unregister_blkdev(MG_DISK_MAJ
, MG_DISK_NAME
);
1017 if (!prv_data
->use_polling
)
1018 free_irq(host
->irq
, host
);
1020 gpio_free(host
->rstout
);
1022 gpio_free(host
->rst
);
1024 iounmap(host
->dev_base
);
1031 static int mg_remove(struct platform_device
*plat_dev
)
1033 struct mg_drv_data
*prv_data
= plat_dev
->dev
.platform_data
;
1034 struct mg_host
*host
= prv_data
->host
;
1038 del_timer_sync(&host
->timer
);
1042 del_gendisk(host
->gd
);
1047 blk_cleanup_queue(host
->breq
);
1049 /* unregister blk device */
1050 unregister_blkdev(host
->major
, MG_DISK_NAME
);
1053 if (!prv_data
->use_polling
)
1054 free_irq(host
->irq
, host
);
1056 /* free reset-out pin */
1057 if (prv_data
->dev_attr
!= MG_BOOT_DEV
)
1058 gpio_free(host
->rstout
);
1062 gpio_free(host
->rst
);
1066 iounmap(host
->dev_base
);
1074 static struct platform_driver mg_disk_driver
= {
1076 .remove
= mg_remove
,
1077 .suspend
= mg_suspend
,
1078 .resume
= mg_resume
,
1080 .name
= MG_DEV_NAME
,
1081 .owner
= THIS_MODULE
,
1085 /****************************************************************************
1089 ****************************************************************************/
1091 static int __init
mg_init(void)
1093 printk(KERN_INFO
"mGine mflash driver, (c) 2008 mGine Co.\n");
1094 return platform_driver_register(&mg_disk_driver
);
1097 static void __exit
mg_exit(void)
1099 printk(KERN_INFO
"mflash driver : bye bye\n");
1100 platform_driver_unregister(&mg_disk_driver
);
1103 module_init(mg_init
);
1104 module_exit(mg_exit
);
1106 MODULE_LICENSE("GPL");
1107 MODULE_AUTHOR("unsik Kim <donari75@gmail.com>");
1108 MODULE_DESCRIPTION("mGine m[g]flash device driver");