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---
r: 14772
b: refs/heads/master
c: ee2d49d
h: refs/heads/master
v: v3
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Richard Purdie authored and Thomas Gleixner committed Nov 29, 2005
1 parent 8535cfd commit 4e2d778
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Showing 2 changed files with 67 additions and 58 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 72af3b2c5a9946e78125e143b636f3d7217bcf08
refs/heads/master: ee2d49de3e3a0b846ecedb36fec0e4a5ff222dcb
123 changes: 66 additions & 57 deletions trunk/drivers/mtd/chips/sharp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
* Copyright 2000,2001 David A. Schleef <ds@schleef.org>
* 2000,2001 Lineo, Inc.
*
* $Id: sharp.c,v 1.16 2005/11/07 11:14:23 gleixner Exp $
* $Id: sharp.c,v 1.17 2005/11/29 14:28:28 gleixner Exp $
*
* Devices supported:
* LH28F016SCT Symmetrical block flash memory, 2Mx8
Expand Down Expand Up @@ -160,22 +160,28 @@ struct mtd_info *sharp_probe(struct map_info *map)
return mtd;
}

static inline void sharp_send_cmd(struct map_info *map, unsigned long cmd, unsigned long adr)
{
map_word map_cmd;
map_cmd.x[0] = cmd;
map_write(map, map_cmd, adr);
}

static int sharp_probe_map(struct map_info *map,struct mtd_info *mtd)
{
unsigned long tmp;
map_word tmp, read0, read4;
unsigned long base = 0;
u32 read0, read4;
int width = 4;

tmp = map_read32(map, base+0);
tmp = map_read(map, base+0);

map_write32(map, CMD_READ_ID, base+0);
sharp_send_cmd(map, CMD_READ_ID, base+0);

read0=map_read32(map, base+0);
read4=map_read32(map, base+4);
if(read0 == 0x89898989){
read0 = map_read(map, base+0);
read4 = map_read(map, base+4);
if(read0.x[0] == 0x89898989){
printk("Looks like sharp flash\n");
switch(read4){
switch(read4.x[0]){
case 0xaaaaaaaa:
case 0xa0a0a0a0:
/* aa - LH28F016SCT-L95 2Mx8, 32 64k blocks*/
Expand All @@ -197,16 +203,16 @@ static int sharp_probe_map(struct map_info *map,struct mtd_info *mtd)
return width;
#endif
default:
printk("Sort-of looks like sharp flash, 0x%08x 0x%08x\n",
read0,read4);
printk("Sort-of looks like sharp flash, 0x%08lx 0x%08lx\n",
read0.x[0], read4.x[0]);
}
}else if((map_read32(map, base+0) == CMD_READ_ID)){
}else if((map_read(map, base+0).x[0] == CMD_READ_ID)){
/* RAM, probably */
printk("Looks like RAM\n");
map_write32(map, tmp, base+0);
map_write(map, tmp, base+0);
}else{
printk("Doesn't look like sharp flash, 0x%08x 0x%08x\n",
read0,read4);
printk("Doesn't look like sharp flash, 0x%08lx 0x%08lx\n",
read0.x[0], read4.x[0]);
}

return 0;
Expand All @@ -215,7 +221,8 @@ static int sharp_probe_map(struct map_info *map,struct mtd_info *mtd)
/* This function returns with the chip->mutex lock held. */
static int sharp_wait(struct map_info *map, struct flchip *chip)
{
int status, i;
int i;
map_word status;
unsigned long timeo = jiffies + HZ;
DECLARE_WAITQUEUE(wait, current);
int adr = 0;
Expand All @@ -225,12 +232,12 @@ static int sharp_wait(struct map_info *map, struct flchip *chip)

switch(chip->state){
case FL_READY:
map_write32(map,CMD_READ_STATUS,adr);
sharp_send_cmd(map, CMD_READ_STATUS, adr);
chip->state = FL_STATUS;
case FL_STATUS:
for(i=0;i<100;i++){
status = map_read32(map,adr);
if((status & SR_READY)==SR_READY)
status = map_read(map, adr);
if((status.x[0] & SR_READY)==SR_READY)
break;
udelay(1);
}
Expand All @@ -254,7 +261,7 @@ static int sharp_wait(struct map_info *map, struct flchip *chip)
goto retry;
}

map_write32(map,CMD_RESET, adr);
sharp_send_cmd(map, CMD_RESET, adr);

chip->state = FL_READY;

Expand Down Expand Up @@ -351,37 +358,39 @@ static int sharp_write_oneword(struct map_info *map, struct flchip *chip,
int timeo;
int try;
int i;
int status = 0;
map_word data, status;

status.x[0] = 0;
ret = sharp_wait(map,chip);

for(try=0;try<10;try++){
map_write32(map,CMD_BYTE_WRITE,adr);
sharp_send_cmd(map, CMD_BYTE_WRITE, adr);
/* cpu_to_le32 -> hack to fix the writel be->le conversion */
map_write32(map,cpu_to_le32(datum),adr);
data.x[0] = cpu_to_le32(datum);
map_write(map, data, adr);

chip->state = FL_WRITING;

timeo = jiffies + (HZ/2);

map_write32(map,CMD_READ_STATUS,adr);
sharp_send_cmd(map, CMD_READ_STATUS, adr);
for(i=0;i<100;i++){
status = map_read32(map,adr);
if((status & SR_READY)==SR_READY)
status = map_read(map, adr);
if((status.x[0] & SR_READY) == SR_READY)
break;
}
if(i==100){
printk("sharp: timed out writing\n");
}

if(!(status&SR_ERRORS))
if(!(status.x[0] & SR_ERRORS))
break;

printk("sharp: error writing byte at addr=%08lx status=%08x\n",adr,status);
printk("sharp: error writing byte at addr=%08lx status=%08lx\n", adr, status.x[0]);

map_write32(map,CMD_CLEAR_STATUS,adr);
sharp_send_cmd(map, CMD_CLEAR_STATUS, adr);
}
map_write32(map,CMD_RESET,adr);
sharp_send_cmd(map, CMD_RESET, adr);
chip->state = FL_READY;

wake_up(&chip->wq);
Expand Down Expand Up @@ -434,18 +443,18 @@ static int sharp_do_wait_for_ready(struct map_info *map, struct flchip *chip,
{
int ret;
unsigned long timeo;
int status;
map_word status;
DECLARE_WAITQUEUE(wait, current);

map_write32(map,CMD_READ_STATUS,adr);
status = map_read32(map,adr);
sharp_send_cmd(map, CMD_READ_STATUS, adr);
status = map_read(map, adr);

timeo = jiffies + HZ;

while(time_before(jiffies, timeo)){
map_write32(map,CMD_READ_STATUS,adr);
status = map_read32(map,adr);
if((status & SR_READY)==SR_READY){
sharp_send_cmd(map, CMD_READ_STATUS, adr);
status = map_read(map, adr);
if((status.x[0] & SR_READY)==SR_READY){
ret = 0;
goto out;
}
Expand Down Expand Up @@ -476,7 +485,7 @@ static int sharp_erase_oneblock(struct map_info *map, struct flchip *chip,
{
int ret;
//int timeo;
int status;
map_word status;
//int i;

//printk("sharp_erase_oneblock()\n");
Expand All @@ -486,26 +495,26 @@ static int sharp_erase_oneblock(struct map_info *map, struct flchip *chip,
sharp_unlock_oneblock(map,chip,adr);
#endif

map_write32(map,CMD_BLOCK_ERASE_1,adr);
map_write32(map,CMD_BLOCK_ERASE_2,adr);
sharp_send_cmd(map, CMD_BLOCK_ERASE_1, adr);
sharp_send_cmd(map, CMD_BLOCK_ERASE_2, adr);

chip->state = FL_ERASING;

ret = sharp_do_wait_for_ready(map,chip,adr);
if(ret<0)return ret;

map_write32(map,CMD_READ_STATUS,adr);
status = map_read32(map,adr);
sharp_send_cmd(map, CMD_READ_STATUS, adr);
status = map_read(map, adr);

if(!(status&SR_ERRORS)){
map_write32(map,CMD_RESET,adr);
if(!(status.x[0] & SR_ERRORS)){
sharp_send_cmd(map, CMD_RESET, adr);
chip->state = FL_READY;
//spin_unlock_bh(chip->mutex);
return 0;
}

printk("sharp: error erasing block at addr=%08lx status=%08x\n",adr,status);
map_write32(map,CMD_CLEAR_STATUS,adr);
printk("sharp: error erasing block at addr=%08lx status=%08lx\n", adr, status.x[0]);
sharp_send_cmd(map, CMD_CLEAR_STATUS, adr);

//spin_unlock_bh(chip->mutex);

Expand All @@ -517,35 +526,35 @@ static void sharp_unlock_oneblock(struct map_info *map, struct flchip *chip,
unsigned long adr)
{
int i;
int status;
map_word status;

map_write32(map,CMD_CLEAR_BLOCK_LOCKS_1,adr);
map_write32(map,CMD_CLEAR_BLOCK_LOCKS_2,adr);
sharp_send_cmd(map, CMD_CLEAR_BLOCK_LOCKS_1, adr);
sharp_send_cmd(map, CMD_CLEAR_BLOCK_LOCKS_2, adr);

udelay(100);

status = map_read32(map,adr);
printk("status=%08x\n",status);
status = map_read(map, adr);
printk("status=%08lx\n", status.x[0]);

for(i=0;i<1000;i++){
//map_write32(map,CMD_READ_STATUS,adr);
status = map_read32(map,adr);
if((status & SR_READY)==SR_READY)
//sharp_send_cmd(map, CMD_READ_STATUS, adr);
status = map_read(map, adr);
if((status.x[0] & SR_READY) == SR_READY)
break;
udelay(100);
}
if(i==1000){
printk("sharp: timed out unlocking block\n");
}

if(!(status&SR_ERRORS)){
map_write32(map,CMD_RESET,adr);
if(!(status.x[0] & SR_ERRORS)){
sharp_send_cmd(map, CMD_RESET, adr);
chip->state = FL_READY;
return;
}

printk("sharp: error unlocking block at addr=%08lx status=%08x\n",adr,status);
map_write32(map,CMD_CLEAR_STATUS,adr);
printk("sharp: error unlocking block at addr=%08lx status=%08lx\n", adr, status.x[0]);
sharp_send_cmd(map, CMD_CLEAR_STATUS, adr);
}
#endif

Expand Down

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