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ssb: check for flash presentence

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We can not assume parallel flash is always present, there are boards
with *serial* flash and probably some without flash at all.
Define some bits by the way.

Signed-off-by: Rafał Miłecki <[email protected]>
Reviewed-by: Hauke Mehrtens <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
This commit is contained in:
Rafał Miłecki 2012-08-08 19:37:04 +02:00 • committed by John W. Linville
commit 902d9e0f48
2 changed files with 24 additions and 8 deletions
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28
drivers/ssb/driver_mipscore.c
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@ -190,16 +190,30 @@ static void ssb_mips_flash_detect(struct ssb_mipscore *mcore)
{
struct ssb_bus *bus = mcore->dev->bus;
mcore->flash_buswidth = 2;
if (bus->chipco.dev) {
mcore->flash_window = 0x1c000000;
mcore->flash_window_size = 0x02000000;
/* When there is no chipcommon on the bus there is 4MB flash */
if (!bus->chipco.dev) {
mcore->flash_buswidth = 2;
mcore->flash_window = SSB_FLASH1;
mcore->flash_window_size = SSB_FLASH1_SZ;
return;
}
/* There is ChipCommon, so use it to read info about flash */
switch (bus->chipco.capabilities & SSB_CHIPCO_CAP_FLASHT) {
case SSB_CHIPCO_FLASHT_STSER:
case SSB_CHIPCO_FLASHT_ATSER:
pr_err("Serial flash not supported\n");
break;
case SSB_CHIPCO_FLASHT_PARA:
pr_debug("Found parallel flash\n");
mcore->flash_window = SSB_FLASH2;
mcore->flash_window_size = SSB_FLASH2_SZ;
if ((ssb_read32(bus->chipco.dev, SSB_CHIPCO_FLASH_CFG)
& SSB_CHIPCO_CFG_DS16) == 0)
mcore->flash_buswidth = 1;
} else {
mcore->flash_window = 0x1fc00000;
mcore->flash_window_size = 0x00400000;
else
mcore->flash_buswidth = 2;
break;
}
}