Commit 902d9e0f authored by Rafał Miłecki's avatar Rafał Miłecki Committed by John W. Linville

ssb: check for flash presentence

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: default avatarRafał Miłecki <zajec5@gmail.com>
Reviewed-by: default avatarHauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 85ce5ae5
......@@ -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;
}
}
......
......@@ -504,7 +504,9 @@
#define SSB_CHIPCO_FLASHCTL_ST_SE 0x02D8 /* Sector Erase */
#define SSB_CHIPCO_FLASHCTL_ST_BE 0x00C7 /* Bulk Erase */
#define SSB_CHIPCO_FLASHCTL_ST_DP 0x00B9 /* Deep Power-down */
#define SSB_CHIPCO_FLASHCTL_ST_RSIG 0x03AB /* Read Electronic Signature */
#define SSB_CHIPCO_FLASHCTL_ST_RES 0x03AB /* Read Electronic Signature */
#define SSB_CHIPCO_FLASHCTL_ST_CSA 0x1000 /* Keep chip select asserted */
#define SSB_CHIPCO_FLASHCTL_ST_SSE 0x0220 /* Sub-sector Erase */
/* Status register bits for ST flashes */
#define SSB_CHIPCO_FLASHSTA_ST_WIP 0x01 /* Write In Progress */
......
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