qi-hardware/xburst-tools
1
0
Fork 0
mirror of git://projects.qi-hardware.com/xburst-tools.git synced 2025-04-21 12:27:27 +03:00
Code Activity

qi-fix-slow-first-bulk.patch

Browse Source 
This patch performs the equivalent init actions to the SDHC slow
unitl first bulk patch in kernel, it allows us to work with large
SDHC cards which exceed Glamo timeout capability at 16MHz for first
access.

Signed-off-by: Andy Green <andy@openmoko.com>
This commit is contained in:
Andy Green
2008-11-28 10:16:38 +00:00
committed by Andy Green
parent b2995f8b39
commit 2e2480ff21
3 changed files with 52 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
qiboot/src/drivers/glamo-mmc.c
View File

@@ -106,12 +106,16 @@ unsigned long mmc_bread(int dev_num, unsigned long blknr, unsigned long blkcnt,
void *dst)
{
unsigned long src = blknr * MMC_BLOCK_SIZE;
int ret;
if (!blkcnt)
return 0;
/* printf("mmc_bread(%d, %ld, %ld, %p)\n", dev_num, blknr, blkcnt, dst); */
mmc_read(src, dst, blkcnt * MMC_BLOCK_SIZE);
ret = mmc_read(src, dst, blkcnt * MMC_BLOCK_SIZE);
if (ret)
return ret;
return blkcnt;
}
@@ -443,6 +447,8 @@ int mmc_read(unsigned long src, u8 *dst, int size)
resp = mmc_cmd(MMC_SET_BLOCKLEN, MMC_BLOCK_SIZE,
MMC_CMD_AC | MMC_RSP_R1, 0, 0, 0,
(u16 *)&response[0]);
if (resp)
return resp;
while (size) {
switch (card_type) {
@@ -460,6 +466,15 @@ int mmc_read(unsigned long src, u8 *dst, int size)
(u16 *)&response[0]);
break;
}
if (resp)
return resp;
/* final speed 16MHz */
glamo_reg_write((glamo_reg_read(GLAMO_REG_CLOCK_GEN8) &
0xff00) | 2, GLAMO_REG_CLOCK_GEN8);
do_pio_read((u16 *)dst, MMC_BLOCK_SIZE >> 1);
if (size >= MMC_BLOCK_SIZE)
@@ -824,9 +839,9 @@ int mmc_init(int verbose)
}
#endif
/* crank the clock to the final speed, 16MHz */
/* set the clock to slow until first bulk completes (for slow SDHC) */
glamo_reg_write((glamo_reg_read(GLAMO_REG_CLOCK_GEN8) & 0xff00) | 2,
glamo_reg_write((glamo_reg_read(GLAMO_REG_CLOCK_GEN8) & 0xff00) | 32,
GLAMO_REG_CLOCK_GEN8);
return rc;