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>
26 #include <linux/slab.h>
28 #define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)
30 /* name for block device */
31 #define MG_DISK_NAME "mgd"
34 #define MG_DISK_MAX_PART 16
35 #define MG_SECTOR_SIZE 512
36 #define MG_MAX_SECTS 256
38 /* Register offsets */
39 #define MG_BUFF_OFFSET 0x8000
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)
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)
58 /* error code for others */
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
67 #define MG_MAX_ERRORS 6 /* Max read/write errors */
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
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)
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)
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
105 #define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)
107 /* main structure for mflash driver */
111 struct request_queue
*breq
;
116 struct timer_list timer
;
117 void (*mg_do_intr
) (struct mg_host
*);
119 u16 id
[ATA_ID_WORDS
];
127 void __iomem
*dev_base
;
137 * Debugging macro and defines
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 */
147 static void mg_request(struct request_queue
*);
149 static bool mg_end_request(struct mg_host
*host
, int err
, unsigned int nr_bytes
)
151 if (__blk_end_request(host
->req
, err
, nr_bytes
))
158 static bool mg_end_request_cur(struct mg_host
*host
, int err
)
160 return mg_end_request(host
, err
, blk_rq_cur_bytes(host
->req
));
163 static void mg_dump_status(const char *msg
, unsigned int stat
,
164 struct mg_host
*host
)
166 char *name
= MG_DISK_NAME
;
169 name
= host
->req
->rq_disk
->disk_name
;
171 printk(KERN_ERR
"%s: %s: status=0x%02x { ", name
, msg
, stat
& 0xff);
175 printk("DriveReady ");
177 printk("WriteFault ");
179 printk("SeekComplete ");
181 printk("DataRequest ");
183 printk("CorrectedError ");
187 if ((stat
& ATA_ERR
) == 0) {
190 host
->error
= inb((unsigned long)host
->dev_base
+ MG_REG_ERROR
);
191 printk(KERN_ERR
"%s: %s: error=0x%02x { ", name
, msg
,
193 if (host
->error
& ATA_BBK
)
194 printk("BadSector ");
195 if (host
->error
& ATA_UNC
)
196 printk("UncorrectableError ");
197 if (host
->error
& ATA_IDNF
)
198 printk("SectorIdNotFound ");
199 if (host
->error
& ATA_ABORTED
)
200 printk("DriveStatusError ");
201 if (host
->error
& ATA_AMNF
)
202 printk("AddrMarkNotFound ");
204 if (host
->error
& (ATA_BBK
| ATA_UNC
| ATA_IDNF
| ATA_AMNF
)) {
206 printk(", sector=%u",
207 (unsigned int)blk_rq_pos(host
->req
));
213 static unsigned int mg_wait(struct mg_host
*host
, u32 expect
, u32 msec
)
216 unsigned long expire
, cur_jiffies
;
217 struct mg_drv_data
*prv_data
= host
->dev
->platform_data
;
219 host
->error
= MG_ERR_NONE
;
220 expire
= jiffies
+ msecs_to_jiffies(msec
);
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.
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
);
232 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
235 cur_jiffies
= jiffies
;
236 if (status
& ATA_BUSY
) {
237 if (expect
== ATA_BUSY
)
240 /* Check the error condition! */
241 if (status
& ATA_ERR
) {
242 mg_dump_status("mg_wait", status
, host
);
246 if (expect
== MG_STAT_READY
)
247 if (MG_READY_OK(status
))
250 if (expect
== ATA_DRQ
)
251 if (status
& ATA_DRQ
)
255 mg_dump_status("not ready", status
, host
);
256 return MG_ERR_INV_STAT
;
259 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
260 } while (time_before(cur_jiffies
, expire
));
262 if (time_after_eq(cur_jiffies
, expire
) && msec
)
263 host
->error
= MG_ERR_TIMEOUT
;
268 static unsigned int mg_wait_rstout(u32 rstout
, u32 msec
)
270 unsigned long expire
;
272 expire
= jiffies
+ msecs_to_jiffies(msec
);
273 while (time_before(jiffies
, expire
)) {
274 if (gpio_get_value(rstout
) == 1)
279 return MG_ERR_RSTOUT
;
282 static void mg_unexpected_intr(struct mg_host
*host
)
284 u32 status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
286 mg_dump_status("mg_unexpected_intr", status
, host
);
289 static irqreturn_t
mg_irq(int irq
, void *dev_id
)
291 struct mg_host
*host
= dev_id
;
292 void (*handler
)(struct mg_host
*) = host
->mg_do_intr
;
294 spin_lock(&host
->lock
);
296 host
->mg_do_intr
= NULL
;
297 del_timer(&host
->timer
);
299 handler
= mg_unexpected_intr
;
302 spin_unlock(&host
->lock
);
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
)
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
)
335 mg_id_string(id
, s
, ofs
, len
- 1);
337 p
= s
+ strnlen(s
, len
- 1);
338 while (p
> s
&& p
[-1] == ' ')
343 static int mg_get_disk_id(struct mg_host
*host
)
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];
353 if (!prv_data
->use_polling
)
354 outb(ATA_NIEN
, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
356 outb(MG_CMD_ID
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
357 err
= mg_wait(host
, ATA_DRQ
, MG_TMAX_WAIT_RD_DRQ
);
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));
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
);
370 if ((id
[ATA_ID_FIELD_VALID
] & 1) == 0)
371 return MG_ERR_TRANSLATION
;
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
];
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
;
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
));
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
);
396 if (!prv_data
->use_polling
)
397 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
403 static int mg_disk_init(struct mg_host
*host
)
405 struct mg_drv_data
*prv_data
= host
->dev
->platform_data
;
410 gpio_set_value(host
->rst
, 0);
411 err
= mg_wait(host
, ATA_BUSY
, MG_TMAX_RST_TO_BUSY
);
416 gpio_set_value(host
->rst
, 1);
417 err
= mg_wait(host
, MG_STAT_READY
, MG_TMAX_HDRST_TO_RDY
);
422 outb(ATA_SRST
| (prv_data
->use_polling
? ATA_NIEN
: 0),
423 (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
424 err
= mg_wait(host
, ATA_BUSY
, MG_TMAX_RST_TO_BUSY
);
429 outb(prv_data
->use_polling
? ATA_NIEN
: 0,
430 (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
431 err
= mg_wait(host
, MG_STAT_READY
, MG_TMAX_SWRST_TO_RDY
);
435 init_status
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
) & 0xf;
437 if (init_status
== 0xf)
438 return MG_ERR_INIT_STAT
;
443 static void mg_bad_rw_intr(struct mg_host
*host
)
446 if (++host
->req
->errors
>= MG_MAX_ERRORS
||
447 host
->error
== MG_ERR_TIMEOUT
)
448 mg_end_request_cur(host
, -EIO
);
451 static unsigned int mg_out(struct mg_host
*host
,
452 unsigned int sect_num
,
453 unsigned int sect_cnt
,
455 void (*intr_addr
)(struct mg_host
*))
457 struct mg_drv_data
*prv_data
= host
->dev
->platform_data
;
459 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
462 if (!prv_data
->use_polling
) {
463 host
->mg_do_intr
= intr_addr
;
464 mod_timer(&host
->timer
, jiffies
+ 3 * HZ
);
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
+
472 outb((u8
)(sect_num
>> 16), (unsigned long)host
->dev_base
+
474 outb((u8
)((sect_num
>> 24) | ATA_LBA
| ATA_DEVICE_OBS
),
475 (unsigned long)host
->dev_base
+ MG_REG_DRV_HEAD
);
476 outb(cmd
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
480 static void mg_read_one(struct mg_host
*host
, struct request
*req
)
482 u16
*buff
= (u16
*)bio_data(req
->bio
);
485 for (i
= 0; i
< MG_SECTOR_SIZE
>> 1; i
++)
486 *buff
++ = inw((unsigned long)host
->dev_base
+ MG_BUFF_OFFSET
+
490 static void mg_read(struct request
*req
)
492 struct mg_host
*host
= req
->rq_disk
->private_data
;
494 if (mg_out(host
, blk_rq_pos(req
), blk_rq_sectors(req
),
495 MG_CMD_RD
, NULL
) != MG_ERR_NONE
)
496 mg_bad_rw_intr(host
);
498 MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
499 blk_rq_sectors(req
), blk_rq_pos(req
), bio_data(req
->bio
));
502 if (mg_wait(host
, ATA_DRQ
,
503 MG_TMAX_WAIT_RD_DRQ
) != MG_ERR_NONE
) {
504 mg_bad_rw_intr(host
);
508 mg_read_one(host
, req
);
510 outb(MG_CMD_RD_CONF
, (unsigned long)host
->dev_base
+
512 } while (mg_end_request(host
, 0, MG_SECTOR_SIZE
));
515 static void mg_write_one(struct mg_host
*host
, struct request
*req
)
517 u16
*buff
= (u16
*)bio_data(req
->bio
);
520 for (i
= 0; i
< MG_SECTOR_SIZE
>> 1; i
++)
521 outw(*buff
++, (unsigned long)host
->dev_base
+ MG_BUFF_OFFSET
+
525 static void mg_write(struct request
*req
)
527 struct mg_host
*host
= req
->rq_disk
->private_data
;
528 unsigned int rem
= blk_rq_sectors(req
);
530 if (mg_out(host
, blk_rq_pos(req
), rem
,
531 MG_CMD_WR
, NULL
) != MG_ERR_NONE
) {
532 mg_bad_rw_intr(host
);
536 MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
537 rem
, blk_rq_pos(req
), bio_data(req
->bio
));
539 if (mg_wait(host
, ATA_DRQ
,
540 MG_TMAX_WAIT_WR_DRQ
) != MG_ERR_NONE
) {
541 mg_bad_rw_intr(host
);
546 mg_write_one(host
, req
);
548 outb(MG_CMD_WR_CONF
, (unsigned long)host
->dev_base
+
552 if (rem
> 1 && mg_wait(host
, ATA_DRQ
,
553 MG_TMAX_WAIT_WR_DRQ
) != MG_ERR_NONE
) {
554 mg_bad_rw_intr(host
);
556 } else if (mg_wait(host
, MG_STAT_READY
,
557 MG_TMAX_WAIT_WR_DRQ
) != MG_ERR_NONE
) {
558 mg_bad_rw_intr(host
);
561 } while (mg_end_request(host
, 0, MG_SECTOR_SIZE
));
564 static void mg_read_intr(struct mg_host
*host
)
566 struct request
*req
= host
->req
;
571 i
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
579 mg_dump_status("mg_read_intr", i
, host
);
580 mg_bad_rw_intr(host
);
581 mg_request(host
->breq
);
585 mg_read_one(host
, req
);
587 MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
588 blk_rq_pos(req
), blk_rq_sectors(req
) - 1, bio_data(req
->bio
));
590 /* send read confirm */
591 outb(MG_CMD_RD_CONF
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
593 if (mg_end_request(host
, 0, MG_SECTOR_SIZE
)) {
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 */
598 mg_request(host
->breq
);
601 static void mg_write_intr(struct mg_host
*host
)
603 struct request
*req
= host
->req
;
609 i
= inb((unsigned long)host
->dev_base
+ MG_REG_STATUS
);
614 if ((blk_rq_sectors(req
) <= 1) || (i
& ATA_DRQ
))
617 mg_dump_status("mg_write_intr", i
, host
);
618 mg_bad_rw_intr(host
);
619 mg_request(host
->breq
);
623 if ((rem
= mg_end_request(host
, 0, MG_SECTOR_SIZE
))) {
624 /* write 1 sector and set handler if remains */
625 mg_write_one(host
, req
);
626 MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
627 blk_rq_pos(req
), blk_rq_sectors(req
), bio_data(req
->bio
));
628 host
->mg_do_intr
= mg_write_intr
;
629 mod_timer(&host
->timer
, jiffies
+ 3 * HZ
);
632 /* send write confirm */
633 outb(MG_CMD_WR_CONF
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
636 mg_request(host
->breq
);
639 static void mg_times_out(unsigned long data
)
641 struct mg_host
*host
= (struct mg_host
*)data
;
644 spin_lock_irq(&host
->lock
);
649 host
->mg_do_intr
= NULL
;
651 name
= host
->req
->rq_disk
->disk_name
;
652 printk(KERN_DEBUG
"%s: timeout\n", name
);
654 host
->error
= MG_ERR_TIMEOUT
;
655 mg_bad_rw_intr(host
);
658 mg_request(host
->breq
);
659 spin_unlock_irq(&host
->lock
);
662 static void mg_request_poll(struct request_queue
*q
)
664 struct mg_host
*host
= q
->queuedata
;
668 host
->req
= blk_fetch_request(q
);
673 if (unlikely(host
->req
->cmd_type
!= REQ_TYPE_FS
)) {
674 mg_end_request_cur(host
, -EIO
);
678 if (rq_data_dir(host
->req
) == READ
)
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
)
690 if (rq_data_dir(req
) == READ
) {
691 if (mg_out(host
, sect_num
, sect_cnt
, MG_CMD_RD
, &mg_read_intr
)
693 mg_bad_rw_intr(host
);
698 outb(ATA_NIEN
, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
699 if (mg_out(host
, sect_num
, sect_cnt
, MG_CMD_WR
, &mg_write_intr
)
701 mg_bad_rw_intr(host
);
704 del_timer(&host
->timer
);
705 mg_wait(host
, ATA_DRQ
, MG_TMAX_WAIT_WR_DRQ
);
706 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
708 mg_bad_rw_intr(host
);
711 mg_write_one(host
, req
);
712 mod_timer(&host
->timer
, jiffies
+ 3 * HZ
);
713 outb(MG_CMD_WR_CONF
, (unsigned long)host
->dev_base
+
719 /* This function also called from IRQ context */
720 static void mg_request(struct request_queue
*q
)
722 struct mg_host
*host
= q
->queuedata
;
724 u32 sect_num
, sect_cnt
;
728 host
->req
= blk_fetch_request(q
);
734 /* check unwanted request call */
735 if (host
->mg_do_intr
)
738 del_timer(&host
->timer
);
740 sect_num
= blk_rq_pos(req
);
741 /* deal whole segments */
742 sect_cnt
= blk_rq_sectors(req
);
745 if (sect_num
>= get_capacity(req
->rq_disk
) ||
746 ((sect_num
+ sect_cnt
) >
747 get_capacity(req
->rq_disk
))) {
749 "%s: bad access: sector=%d, count=%d\n",
750 req
->rq_disk
->disk_name
,
752 mg_end_request_cur(host
, -EIO
);
756 if (unlikely(req
->cmd_type
!= REQ_TYPE_FS
)) {
757 mg_end_request_cur(host
, -EIO
);
761 if (!mg_issue_req(req
, host
, sect_num
, sect_cnt
))
766 static int mg_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
768 struct mg_host
*host
= bdev
->bd_disk
->private_data
;
770 geo
->cylinders
= (unsigned short)host
->cyls
;
771 geo
->heads
= (unsigned char)host
->heads
;
772 geo
->sectors
= (unsigned char)host
->sectors
;
776 static const struct block_device_operations mg_disk_ops
= {
780 #ifdef CONFIG_PM_SLEEP
781 static int mg_suspend(struct device
*dev
)
783 struct mg_drv_data
*prv_data
= dev
->platform_data
;
784 struct mg_host
*host
= prv_data
->host
;
786 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
789 if (!prv_data
->use_polling
)
790 outb(ATA_NIEN
, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
792 outb(MG_CMD_SLEEP
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
793 /* wait until mflash deep sleep */
796 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
)) {
797 if (!prv_data
->use_polling
)
798 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
805 static int mg_resume(struct device
*dev
)
807 struct mg_drv_data
*prv_data
= dev
->platform_data
;
808 struct mg_host
*host
= prv_data
->host
;
810 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
813 outb(MG_CMD_WAKEUP
, (unsigned long)host
->dev_base
+ MG_REG_COMMAND
);
814 /* wait until mflash wakeup */
817 if (mg_wait(host
, MG_STAT_READY
, MG_TMAX_CONF_TO_CMD
))
820 if (!prv_data
->use_polling
)
821 outb(0, (unsigned long)host
->dev_base
+ MG_REG_DRV_CTRL
);
827 static SIMPLE_DEV_PM_OPS(mg_pm
, mg_suspend
, mg_resume
);
829 static int mg_probe(struct platform_device
*plat_dev
)
831 struct mg_host
*host
;
832 struct resource
*rsc
;
833 struct mg_drv_data
*prv_data
= plat_dev
->dev
.platform_data
;
837 printk(KERN_ERR
"%s:%d fail (no driver_data)\n",
844 host
= kzalloc(sizeof(struct mg_host
), GFP_KERNEL
);
846 printk(KERN_ERR
"%s:%d fail (no memory for mg_host)\n",
851 host
->major
= MG_DISK_MAJ
;
853 /* link each other */
854 prv_data
->host
= host
;
855 host
->dev
= &plat_dev
->dev
;
858 rsc
= platform_get_resource(plat_dev
, IORESOURCE_MEM
, 0);
860 printk(KERN_ERR
"%s:%d platform_get_resource fail\n",
865 host
->dev_base
= ioremap(rsc
->start
, resource_size(rsc
));
866 if (!host
->dev_base
) {
867 printk(KERN_ERR
"%s:%d ioremap fail\n",
872 MG_DBG("dev_base = 0x%x\n", (u32
)host
->dev_base
);
875 rsc
= platform_get_resource_byname(plat_dev
, IORESOURCE_IO
,
878 printk(KERN_ERR
"%s:%d get reset pin fail\n",
883 host
->rst
= rsc
->start
;
886 err
= gpio_request(host
->rst
, MG_RST_PIN
);
889 gpio_direction_output(host
->rst
, 1);
892 if (!(prv_data
->dev_attr
& MG_DEV_MASK
)) {
897 if (prv_data
->dev_attr
!= MG_BOOT_DEV
) {
898 rsc
= platform_get_resource_byname(plat_dev
, IORESOURCE_IO
,
901 printk(KERN_ERR
"%s:%d get reset-out pin fail\n",
906 host
->rstout
= rsc
->start
;
907 err
= gpio_request(host
->rstout
, MG_RSTOUT_PIN
);
910 gpio_direction_input(host
->rstout
);
914 if (prv_data
->dev_attr
== MG_STORAGE_DEV
) {
915 /* If POR seq. not yet finished, wait */
916 err
= mg_wait_rstout(host
->rstout
, MG_TMAX_RSTOUT
);
919 err
= mg_disk_init(host
);
921 printk(KERN_ERR
"%s:%d fail (err code : %d)\n",
922 __func__
, __LINE__
, err
);
928 /* get irq resource */
929 if (!prv_data
->use_polling
) {
930 host
->irq
= platform_get_irq(plat_dev
, 0);
931 if (host
->irq
== -ENXIO
) {
935 err
= request_irq(host
->irq
, mg_irq
,
939 printk(KERN_ERR
"%s:%d fail (request_irq err=%d)\n",
940 __func__
, __LINE__
, err
);
947 err
= mg_get_disk_id(host
);
949 printk(KERN_ERR
"%s:%d fail (err code : %d)\n",
950 __func__
, __LINE__
, err
);
955 err
= register_blkdev(host
->major
, MG_DISK_NAME
);
957 printk(KERN_ERR
"%s:%d register_blkdev fail (err code : %d)\n",
958 __func__
, __LINE__
, err
);
964 spin_lock_init(&host
->lock
);
966 if (prv_data
->use_polling
)
967 host
->breq
= blk_init_queue(mg_request_poll
, &host
->lock
);
969 host
->breq
= blk_init_queue(mg_request
, &host
->lock
);
973 printk(KERN_ERR
"%s:%d (blk_init_queue) fail\n",
977 host
->breq
->queuedata
= host
;
979 /* mflash is random device, thanx for the noop */
980 err
= elevator_change(host
->breq
, "noop");
982 printk(KERN_ERR
"%s:%d (elevator_init) fail\n",
986 blk_queue_max_hw_sectors(host
->breq
, MG_MAX_SECTS
);
987 blk_queue_logical_block_size(host
->breq
, MG_SECTOR_SIZE
);
989 init_timer(&host
->timer
);
990 host
->timer
.function
= mg_times_out
;
991 host
->timer
.data
= (unsigned long)host
;
993 host
->gd
= alloc_disk(MG_DISK_MAX_PART
);
995 printk(KERN_ERR
"%s:%d (alloc_disk) fail\n",
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");
1007 set_capacity(host
->gd
, host
->n_sectors
);
1014 del_timer_sync(&host
->timer
);
1016 blk_cleanup_queue(host
->breq
);
1018 unregister_blkdev(MG_DISK_MAJ
, MG_DISK_NAME
);
1020 if (!prv_data
->use_polling
)
1021 free_irq(host
->irq
, host
);
1023 gpio_free(host
->rstout
);
1025 gpio_free(host
->rst
);
1027 iounmap(host
->dev_base
);
1034 static int mg_remove(struct platform_device
*plat_dev
)
1036 struct mg_drv_data
*prv_data
= plat_dev
->dev
.platform_data
;
1037 struct mg_host
*host
= prv_data
->host
;
1041 del_timer_sync(&host
->timer
);
1045 del_gendisk(host
->gd
);
1050 blk_cleanup_queue(host
->breq
);
1052 /* unregister blk device */
1053 unregister_blkdev(host
->major
, MG_DISK_NAME
);
1056 if (!prv_data
->use_polling
)
1057 free_irq(host
->irq
, host
);
1059 /* free reset-out pin */
1060 if (prv_data
->dev_attr
!= MG_BOOT_DEV
)
1061 gpio_free(host
->rstout
);
1065 gpio_free(host
->rst
);
1069 iounmap(host
->dev_base
);
1077 static struct platform_driver mg_disk_driver
= {
1079 .remove
= mg_remove
,
1081 .name
= MG_DEV_NAME
,
1086 /****************************************************************************
1090 ****************************************************************************/
1092 static int __init
mg_init(void)
1094 printk(KERN_INFO
"mGine mflash driver, (c) 2008 mGine Co.\n");
1095 return platform_driver_register(&mg_disk_driver
);
1098 static void __exit
mg_exit(void)
1100 printk(KERN_INFO
"mflash driver : bye bye\n");
1101 platform_driver_unregister(&mg_disk_driver
);
1104 module_init(mg_init
);
1105 module_exit(mg_exit
);
1107 MODULE_LICENSE("GPL");
1108 MODULE_AUTHOR("unsik Kim <donari75@gmail.com>");
1109 MODULE_DESCRIPTION("mGine m[g]flash device driver");