bcma: get info about flash type SoC booted from
There is an ongoing work on cleaning MIPS's nvram support so it could be
re-used on other platforms (bcm53xx to say precisely).
This will require a bit of extra logic in bcma this patch implements.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/bcma/driver_mips.c b/drivers/bcma/driver_mips.c
index 11115bbe..004d6aa 100644
--- a/drivers/bcma/driver_mips.c
+++ b/drivers/bcma/driver_mips.c
@@ -21,6 +21,14 @@
#include <linux/serial_reg.h>
#include <linux/time.h>
+enum bcma_boot_dev {
+ BCMA_BOOT_DEV_UNK = 0,
+ BCMA_BOOT_DEV_ROM,
+ BCMA_BOOT_DEV_PARALLEL,
+ BCMA_BOOT_DEV_SERIAL,
+ BCMA_BOOT_DEV_NAND,
+};
+
static const char * const part_probes[] = { "bcm47xxpart", NULL };
static struct physmap_flash_data bcma_pflash_data = {
@@ -229,11 +237,51 @@
}
EXPORT_SYMBOL(bcma_cpu_clock);
+static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus)
+{
+ struct bcma_drv_cc *cc = &bus->drv_cc;
+ u8 cc_rev = cc->core->id.rev;
+
+ if (cc_rev == 42) {
+ struct bcma_device *core;
+
+ core = bcma_find_core(bus, BCMA_CORE_NS_ROM);
+ if (core) {
+ switch (bcma_aread32(core, BCMA_IOST) &
+ BCMA_NS_ROM_IOST_BOOT_DEV_MASK) {
+ case BCMA_NS_ROM_IOST_BOOT_DEV_NOR:
+ return BCMA_BOOT_DEV_SERIAL;
+ case BCMA_NS_ROM_IOST_BOOT_DEV_NAND:
+ return BCMA_BOOT_DEV_NAND;
+ case BCMA_NS_ROM_IOST_BOOT_DEV_ROM:
+ default:
+ return BCMA_BOOT_DEV_ROM;
+ }
+ }
+ } else {
+ if (cc_rev == 38) {
+ if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)
+ return BCMA_BOOT_DEV_NAND;
+ else if (cc->status & BIT(5))
+ return BCMA_BOOT_DEV_ROM;
+ }
+
+ if ((cc->capabilities & BCMA_CC_CAP_FLASHT) ==
+ BCMA_CC_FLASHT_PARA)
+ return BCMA_BOOT_DEV_PARALLEL;
+ else
+ return BCMA_BOOT_DEV_SERIAL;
+ }
+
+ return BCMA_BOOT_DEV_SERIAL;
+}
+
static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore)
{
struct bcma_bus *bus = mcore->core->bus;
struct bcma_drv_cc *cc = &bus->drv_cc;
struct bcma_pflash *pflash = &cc->pflash;
+ enum bcma_boot_dev boot_dev;
switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
case BCMA_CC_FLASHT_STSER:
@@ -269,6 +317,20 @@
bcma_nflash_init(cc);
}
}
+
+ /* Determine flash type this SoC boots from */
+ boot_dev = bcma_boot_dev(bus);
+ switch (boot_dev) {
+ case BCMA_BOOT_DEV_PARALLEL:
+ case BCMA_BOOT_DEV_SERIAL:
+ /* TODO: Init NVRAM using BCMA_SOC_FLASH2 window */
+ break;
+ case BCMA_BOOT_DEV_NAND:
+ /* TODO: Init NVRAM using BCMA_SOC_FLASH1 window */
+ break;
+ default:
+ break;
+ }
}
void bcma_core_mips_early_init(struct bcma_drv_mips *mcore)