u-boot/drivers/block/mg_disk.c

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/*
* (C) Copyright 2009 mGine co.
* unsik Kim <donari75@gmail.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <malloc.h>
#include <part.h>
#include <ata.h>
#include <asm/io.h>
#include "mg_disk_prv.h"
#ifndef CONFIG_MG_DISK_RES
#define CONFIG_MG_DISK_RES 0
#endif
#define MG_RES_SEC ((CONFIG_MG_DISK_RES) << 1)
static struct mg_host host;
static inline u32 mg_base(void)
{
return host.drv_data->base;
}
static block_dev_desc_t mg_disk_dev = {
.if_type = IF_TYPE_ATAPI,
.part_type = PART_TYPE_UNKNOWN,
.type = DEV_TYPE_HARDDISK,
.blksz = MG_SECTOR_SIZE,
.priv = &host };
static void mg_dump_status (const char *msg, unsigned int stat, unsigned err)
{
char *name = MG_DEV_NAME;
printf("%s: %s: status=0x%02x { ", name, msg, stat & 0xff);
if (stat & MG_REG_STATUS_BIT_BUSY)
printf("Busy ");
if (stat & MG_REG_STATUS_BIT_READY)
printf("DriveReady ");
if (stat & MG_REG_STATUS_BIT_WRITE_FAULT)
printf("WriteFault ");
if (stat & MG_REG_STATUS_BIT_SEEK_DONE)
printf("SeekComplete ");
if (stat & MG_REG_STATUS_BIT_DATA_REQ)
printf("DataRequest ");
if (stat & MG_REG_STATUS_BIT_CORRECTED_ERROR)
printf("CorrectedError ");
if (stat & MG_REG_STATUS_BIT_ERROR)
printf("Error ");
printf("}\n");
if ((stat & MG_REG_STATUS_BIT_ERROR)) {
printf("%s: %s: error=0x%02x { ", name, msg, err & 0xff);
if (err & MG_REG_ERR_BBK)
printf("BadSector ");
if (err & MG_REG_ERR_UNC)
printf("UncorrectableError ");
if (err & MG_REG_ERR_IDNF)
printf("SectorIdNotFound ");
if (err & MG_REG_ERR_ABRT)
printf("DriveStatusError ");
if (err & MG_REG_ERR_AMNF)
printf("AddrMarkNotFound ");
printf("}\n");
}
}
static unsigned int mg_wait (u32 expect, u32 msec)
{
u8 status;
u32 from, cur, err;
err = MG_ERR_NONE;
reset_timer();
from = get_timer(0);
status = readb(mg_base() + MG_REG_STATUS);
do {
cur = get_timer(from);
if (status & MG_REG_STATUS_BIT_BUSY) {
if (expect == MG_REG_STATUS_BIT_BUSY)
break;
} else {
/* Check the error condition! */
if (status & MG_REG_STATUS_BIT_ERROR) {
err = readb(mg_base() + MG_REG_ERROR);
mg_dump_status("mg_wait", status, err);
break;
}
if (expect == MG_STAT_READY)
if (MG_READY_OK(status))
break;
if (expect == MG_REG_STATUS_BIT_DATA_REQ)
if (status & MG_REG_STATUS_BIT_DATA_REQ)
break;
}
status = readb(mg_base() + MG_REG_STATUS);
} while (cur < msec);
if (cur >= msec)
err = MG_ERR_TIMEOUT;
return err;
}
static int mg_get_disk_id (void)
{
u16 id[(MG_SECTOR_SIZE / sizeof(u16))];
hd_driveid_t *iop = (hd_driveid_t *)id;
u32 i, err, res;
writeb(MG_CMD_ID, mg_base() + MG_REG_COMMAND);
err = mg_wait(MG_REG_STATUS_BIT_DATA_REQ, 3000);
if (err)
return err;
for(i = 0; i < (MG_SECTOR_SIZE / sizeof(u16)); i++)
id[i] = readw(mg_base() + MG_BUFF_OFFSET + i * 2);
writeb(MG_CMD_RD_CONF, mg_base() + MG_REG_COMMAND);
err = mg_wait(MG_STAT_READY, 3000);
if (err)
return err;
ata_swap_buf_le16(id, MG_SECTOR_SIZE / sizeof(u16));
if((iop->field_valid & 1) == 0)
return MG_ERR_TRANSLATION;
ata_id_c_string(id, (unsigned char *)mg_disk_dev.revision,
ATA_ID_FW_REV, sizeof(mg_disk_dev.revision));
ata_id_c_string(id, (unsigned char *)mg_disk_dev.vendor,
ATA_ID_PROD, sizeof(mg_disk_dev.vendor));
ata_id_c_string(id, (unsigned char *)mg_disk_dev.product,
ATA_ID_SERNO, sizeof(mg_disk_dev.product));
#ifdef __BIG_ENDIAN
iop->lba_capacity = (iop->lba_capacity << 16) |
(iop->lba_capacity >> 16);
#endif /* __BIG_ENDIAN */
if (MG_RES_SEC) {
MG_DBG("MG_RES_SEC=%d\n", MG_RES_SEC);
iop->cyls = (iop->lba_capacity - MG_RES_SEC) /
iop->sectors / iop->heads;
res = iop->lba_capacity -
iop->cyls * iop->heads * iop->sectors;
iop->lba_capacity -= res;
printf("mg_disk: %d sectors reserved\n", res);
}
mg_disk_dev.lba = iop->lba_capacity;
return MG_ERR_NONE;
}
static int mg_disk_reset (void)
{
struct mg_drv_data *prv_data = host.drv_data;
s32 err;
u8 init_status;
/* hdd rst low */
prv_data->mg_hdrst_pin(0);
err = mg_wait(MG_REG_STATUS_BIT_BUSY, 300);
if(err)
return err;
/* hdd rst high */
prv_data->mg_hdrst_pin(1);
err = mg_wait(MG_STAT_READY, 3000);
if(err)
return err;
/* soft reset on */
writeb(MG_REG_CTRL_RESET | MG_REG_CTRL_INTR_DISABLE,
mg_base() + MG_REG_DRV_CTRL);
err = mg_wait(MG_REG_STATUS_BIT_BUSY, 3000);
if(err)
return err;
/* soft reset off */
writeb(MG_REG_CTRL_INTR_DISABLE, mg_base() + MG_REG_DRV_CTRL);
err = mg_wait(MG_STAT_READY, 3000);
if(err)
return err;
init_status = readb(mg_base() + MG_REG_STATUS) & 0xf;
if (init_status == 0xf)
return MG_ERR_INIT_STAT;
return err;
}
static unsigned int mg_out(unsigned int sect_num,
unsigned int sect_cnt,
unsigned int cmd)
{
u32 err = MG_ERR_NONE;
err = mg_wait(MG_STAT_READY, 3000);
if (err)
return err;
writeb((u8)sect_cnt, mg_base() + MG_REG_SECT_CNT);
writeb((u8)sect_num, mg_base() + MG_REG_SECT_NUM);
writeb((u8)(sect_num >> 8), mg_base() + MG_REG_CYL_LOW);
writeb((u8)(sect_num >> 16), mg_base() + MG_REG_CYL_HIGH);
writeb((u8)((sect_num >> 24) | MG_REG_HEAD_LBA_MODE),
mg_base() + MG_REG_DRV_HEAD);
writeb(cmd, mg_base() + MG_REG_COMMAND);
return err;
}
static unsigned int mg_do_read_sects(void *buff, u32 sect_num, u32 sect_cnt)
{
u32 i, j, err;
u8 *buff_ptr = buff;
union mg_uniwb uniwb;
err = mg_out(sect_num, sect_cnt, MG_CMD_RD);
if (err)
return err;
for (i = 0; i < sect_cnt; i++) {
err = mg_wait(MG_REG_STATUS_BIT_DATA_REQ, 3000);
if (err)
return err;
if ((u32)buff_ptr & 1) {
for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
uniwb.w = readw(mg_base() + MG_BUFF_OFFSET
+ (j << 1));
*buff_ptr++ = uniwb.b[0];
*buff_ptr++ = uniwb.b[1];
}
} else {
for(j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
*(u16 *)buff_ptr = readw(mg_base() +
MG_BUFF_OFFSET + (j << 1));
buff_ptr += 2;
}
}
writeb(MG_CMD_RD_CONF, mg_base() + MG_REG_COMMAND);
MG_DBG("%u (0x%8.8x) sector read", sect_num + i,
(sect_num + i) * MG_SECTOR_SIZE);
}
return err;
}
unsigned int mg_disk_read_sects(void *buff, u32 sect_num, u32 sect_cnt)
{
u32 quotient, residue, i, err;
u8 *buff_ptr = buff;
quotient = sect_cnt >> 8;
residue = sect_cnt % 256;
for (i = 0; i < quotient; i++) {
MG_DBG("sect num : %u buff : 0x%8.8x", sect_num, (u32)buff_ptr);
err = mg_do_read_sects(buff_ptr, sect_num, 256);
if (err)
return err;
sect_num += 256;
buff_ptr += 256 * MG_SECTOR_SIZE;
}
if (residue) {
MG_DBG("sect num : %u buff : %8.8x", sect_num, (u32)buff_ptr);
err = mg_do_read_sects(buff_ptr, sect_num, residue);
}
return err;
}
unsigned long mg_block_read (int dev, unsigned long start,
lbaint_t blkcnt, void *buffer)
{
start += MG_RES_SEC;
if (! mg_disk_read_sects(buffer, start, blkcnt))
return blkcnt;
else
return 0;
}
unsigned int mg_disk_read (u32 addr, u8 *buff, u32 len)
{
u8 *sect_buff, *buff_ptr = buff;
u32 cur_addr, next_sec_addr, end_addr, cnt, sect_num;
u32 err = MG_ERR_NONE;
/* TODO : sanity chk */
cnt = 0;
cur_addr = addr;
end_addr = addr + len;
sect_buff = malloc(MG_SECTOR_SIZE);
if (cur_addr & MG_SECTOR_SIZE_MASK) {
next_sec_addr = (cur_addr + MG_SECTOR_SIZE) &
~MG_SECTOR_SIZE_MASK;
sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
err = mg_disk_read_sects(sect_buff, sect_num, 1);
if (err)
goto mg_read_exit;
if (end_addr < next_sec_addr) {
memcpy(buff_ptr,
sect_buff + (cur_addr & MG_SECTOR_SIZE_MASK),
end_addr - cur_addr);
MG_DBG("copies %u byte from sector offset 0x%8.8x",
end_addr - cur_addr, cur_addr);
cur_addr = end_addr;
} else {
memcpy(buff_ptr,
sect_buff + (cur_addr & MG_SECTOR_SIZE_MASK),
next_sec_addr - cur_addr);
MG_DBG("copies %u byte from sector offset 0x%8.8x",
next_sec_addr - cur_addr, cur_addr);
buff_ptr += (next_sec_addr - cur_addr);
cur_addr = next_sec_addr;
}
}
if (cur_addr < end_addr) {
sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
cnt = ((end_addr & ~MG_SECTOR_SIZE_MASK) - cur_addr) >>
MG_SECTOR_SIZE_SHIFT;
if (cnt)
err = mg_disk_read_sects(buff_ptr, sect_num, cnt);
if (err)
goto mg_read_exit;
buff_ptr += cnt * MG_SECTOR_SIZE;
cur_addr += cnt * MG_SECTOR_SIZE;
if (cur_addr < end_addr) {
sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
err = mg_disk_read_sects(sect_buff, sect_num, 1);
if (err)
goto mg_read_exit;
memcpy(buff_ptr, sect_buff, end_addr - cur_addr);
MG_DBG("copies %u byte", end_addr - cur_addr);
}
}
mg_read_exit:
free(sect_buff);
return err;
}
static int mg_do_write_sects(void *buff, u32 sect_num, u32 sect_cnt)
{
u32 i, j, err;
u8 *buff_ptr = buff;
union mg_uniwb uniwb;
err = mg_out(sect_num, sect_cnt, MG_CMD_WR);
if (err)
return err;
for (i = 0; i < sect_cnt; i++) {
err = mg_wait(MG_REG_STATUS_BIT_DATA_REQ, 3000);
if (err)
return err;
if ((u32)buff_ptr & 1) {
uniwb.b[0] = *buff_ptr++;
uniwb.b[1] = *buff_ptr++;
writew(uniwb.w, mg_base() + MG_BUFF_OFFSET + (j << 1));
} else {
for(j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
writew(*(u16 *)buff_ptr,
mg_base() + MG_BUFF_OFFSET +
(j << 1));
buff_ptr += 2;
}
}
writeb(MG_CMD_WR_CONF, mg_base() + MG_REG_COMMAND);
MG_DBG("%u (0x%8.8x) sector write",
sect_num + i, (sect_num + i) * MG_SECTOR_SIZE);
}
return err;
}
unsigned int mg_disk_write_sects(void *buff, u32 sect_num, u32 sect_cnt)
{
u32 quotient, residue, i;
u32 err = MG_ERR_NONE;
u8 *buff_ptr = buff;
quotient = sect_cnt >> 8;
residue = sect_cnt % 256;
for (i = 0; i < quotient; i++) {
MG_DBG("sect num : %u buff : %8.8x", sect_num, (u32)buff_ptr);
err = mg_do_write_sects(buff_ptr, sect_num, 256);
if (err)
return err;
sect_num += 256;
buff_ptr += 256 * MG_SECTOR_SIZE;
}
if (residue) {
MG_DBG("sect num : %u buff : %8.8x", sect_num, (u32)buff_ptr);
err = mg_do_write_sects(buff_ptr, sect_num, residue);
}
return err;
}
unsigned long mg_block_write (int dev, unsigned long start,
lbaint_t blkcnt, const void *buffer)
{
start += MG_RES_SEC;
if (!mg_disk_write_sects((void *)buffer, start, blkcnt))
return blkcnt;
else
return 0;
}
unsigned int mg_disk_write(u32 addr, u8 *buff, u32 len)
{
u8 *sect_buff, *buff_ptr = buff;
u32 cur_addr, next_sec_addr, end_addr, cnt, sect_num;
u32 err = MG_ERR_NONE;
/* TODO : sanity chk */
cnt = 0;
cur_addr = addr;
end_addr = addr + len;
sect_buff = malloc(MG_SECTOR_SIZE);
if (cur_addr & MG_SECTOR_SIZE_MASK) {
next_sec_addr = (cur_addr + MG_SECTOR_SIZE) &
~MG_SECTOR_SIZE_MASK;
sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
err = mg_disk_read_sects(sect_buff, sect_num, 1);
if (err)
goto mg_write_exit;
if (end_addr < next_sec_addr) {
memcpy(sect_buff + (cur_addr & MG_SECTOR_SIZE_MASK),
buff_ptr, end_addr - cur_addr);
MG_DBG("copies %u byte to sector offset 0x%8.8x",
end_addr - cur_addr, cur_addr);
cur_addr = end_addr;
} else {
memcpy(sect_buff + (cur_addr & MG_SECTOR_SIZE_MASK),
buff_ptr, next_sec_addr - cur_addr);
MG_DBG("copies %u byte to sector offset 0x%8.8x",
next_sec_addr - cur_addr, cur_addr);
buff_ptr += (next_sec_addr - cur_addr);
cur_addr = next_sec_addr;
}
err = mg_disk_write_sects(sect_buff, sect_num, 1);
if (err)
goto mg_write_exit;
}
if (cur_addr < end_addr) {
sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
cnt = ((end_addr & ~MG_SECTOR_SIZE_MASK) - cur_addr) >>
MG_SECTOR_SIZE_SHIFT;
if (cnt)
err = mg_disk_write_sects(buff_ptr, sect_num, cnt);
if (err)
goto mg_write_exit;
buff_ptr += cnt * MG_SECTOR_SIZE;
cur_addr += cnt * MG_SECTOR_SIZE;
if (cur_addr < end_addr) {
sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
err = mg_disk_read_sects(sect_buff, sect_num, 1);
if (err)
goto mg_write_exit;
memcpy(sect_buff, buff_ptr, end_addr - cur_addr);
MG_DBG("copies %u byte", end_addr - cur_addr);
err = mg_disk_write_sects(sect_buff, sect_num, 1);
}
}
mg_write_exit:
free(sect_buff);
return err;
}
block_dev_desc_t *mg_disk_get_dev(int dev)
{
return ((block_dev_desc_t *) & mg_disk_dev);
}
/* must override this function */
struct mg_drv_data * __attribute__((weak)) mg_get_drv_data (void)
{
puts ("### WARNING ### port mg_get_drv_data function\n");
return NULL;
}
unsigned int mg_disk_init (void)
{
struct mg_drv_data *prv_data;
u32 err = MG_ERR_NONE;
prv_data = mg_get_drv_data();
if (! prv_data) {
printf("%s:%d fail (no driver_data)\n", __func__, __LINE__);
err = MG_ERR_NO_DRV_DATA;
return err;
}
((struct mg_host *)mg_disk_dev.priv)->drv_data = prv_data;
/* init ctrl pin */
if (prv_data->mg_ctrl_pin_init)
prv_data->mg_ctrl_pin_init();
if (! prv_data->mg_hdrst_pin) {
err = MG_ERR_CTRL_RST;
return err;
}
/* disk reset */
err = mg_disk_reset();
if (err) {
printf("%s:%d fail (err code : %d)\n", __func__, __LINE__, err);
return err;
}
/* get disk id */
err = mg_get_disk_id();
if (err) {
printf("%s:%d fail (err code : %d)\n", __func__, __LINE__, err);
return err;
}
mg_disk_dev.block_read = mg_block_read;
mg_disk_dev.block_write = mg_block_write;
init_part(&mg_disk_dev);
dev_print(&mg_disk_dev);
return err;
}