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[ARM] tegra: fuse: Add function to get Tegra revision

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Change-Id: I11783f5784454fec143393336195db40c9aa3160
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-10-17 15:00:08 -07:00
parent c32a73b4fc
commit 0a14acba78
2 changed files with 41 additions and 1 deletions
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33
arch/arm/mach-tegra/fuse.c
View File

@@ -43,6 +43,13 @@ static u32 *tegra_fuse_bb;
static dma_addr_t tegra_fuse_bb_phys;
static DECLARE_COMPLETION(tegra_fuse_wait);
static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
[TEGRA_REVISION_UNKNOWN] = "unknown",
[TEGRA_REVISION_A02] = "A02",
[TEGRA_REVISION_A03] = "A03",
[TEGRA_REVISION_A03p] = "A03 prime",
};
static void fuse_dma_complete(struct tegra_dma_req *req)
{
complete(&tegra_fuse_wait);
@@ -136,13 +143,19 @@ void tegra_fuse_writel(u32 value, unsigned long offset)
fuse_writel(value, offset);
}
static inline bool get_spare_fuse(int bit)
{
return fuse_readl(FUSE_SPARE_BIT + bit * 4);
}
void tegra_init_fuse(void)
{
u32 reg = readl(IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48));
reg |= 1 << 28;
writel(reg, IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48));
pr_info("Tegra SKU: %d CPU Process: %d Core Process: %d\n",
pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
tegra_revision_name[tegra_get_revision()],
tegra_sku_id(), tegra_cpu_process_id(),
tegra_core_process_id());
}
@@ -200,3 +213,21 @@ int tegra_core_process_id(void)
core_process_id = (reg >> 12) & 3;
return core_process_id;
}
enum tegra_revision tegra_get_revision(void)
{
void __iomem *chip_id = IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804;
u32 id = readl(chip_id);
switch ((id >> 16) & 0xf) {
case 2:
return TEGRA_REVISION_A02;
case 3:
if (get_spare_fuse(18) || get_spare_fuse(19))
return TEGRA_REVISION_A03p;
else
return TEGRA_REVISION_A03;
default:
return TEGRA_REVISION_UNKNOWN;
}
}

9
arch/arm/mach-tegra/fuse.h
View File

@@ -17,6 +17,14 @@
*
*/
enum tegra_revision {
TEGRA_REVISION_UNKNOWN = 0,
TEGRA_REVISION_A02,
TEGRA_REVISION_A03,
TEGRA_REVISION_A03p,
TEGRA_REVISION_MAX,
};
unsigned long long tegra_chip_uid(void);
int tegra_sku_id(void);
int tegra_cpu_process_id(void);
@@ -25,3 +33,4 @@ void tegra_init_fuse(void);
void tegra_init_fuse_dma(void);
u32 tegra_fuse_readl(unsigned long offset);
void tegra_fuse_writel(u32 value, unsigned long offset);
enum tegra_revision tegra_get_revision(void);