diff options
| author | Rizwan Qureshi <rizwan.qureshi@intel.com> | 2018-12-31 15:19:16 +0530 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-01-21 13:25:31 +0000 |
| commit | f9f50936446e8e441238ecfe12ce0fc9e04d491a (patch) | |
| tree | 2ce1ff776d013c72c8394da623f801facf7bd100 /src/southbridge | |
| parent | afe15f0a34fd02ef024d48d2b047ecd4ef559d74 (diff) | |
drivers/spi: Add controller protection type
Some SPI controllers support both READ and WRITE protection
add a variable to the protect API for the callers to specify
the kind of protection they want (Read/Write/Both).
Also, update the callers and protect API implementation.
BUG=None
BRANCH=None
TEST=test that the mrc cache is protected as expected on soraka.
Also tried if the read protection is applied correctly.
Change-Id: I093884c4768b08a378f21242ac82e430ac013d15
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/c/30559
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/intel/common/spi.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c index 9bc34140a9..4c5939963f 100644 --- a/src/southbridge/intel/common/spi.c +++ b/src/southbridge/intel/common/spi.c @@ -1010,12 +1010,14 @@ static u32 spi_fpr(u32 base, u32 limit) * Returns 0 on success, -1 on failure of programming fpr registers. */ static int spi_flash_protect(const struct spi_flash *flash, - const struct region *region) + const struct region *region, + const enum ctrlr_prot_type type) { ich_spi_controller *cntlr = car_get_var_ptr(&g_cntlr); u32 start = region_offset(region); u32 end = start + region_sz(region) - 1; u32 reg; + u32 protect_mask = 0; int fpr; uint32_t *fpr_base; @@ -1033,13 +1035,32 @@ static int spi_flash_protect(const struct spi_flash *flash, return -1; } + switch (type) { + case WRITE_PROTECT: + protect_mask |= SPI_FPR_WPE; + break; + case READ_PROTECT: + if (IS_ENABLED(CONFIG_SOUTHBRIDGE_INTEL_I82801GX)) + return -1; + protect_mask |= ICH9_SPI_FPR_RPE; + break; + case READ_WRITE_PROTECT: + if (IS_ENABLED(CONFIG_SOUTHBRIDGE_INTEL_I82801GX)) + return -1; + protect_mask |= (ICH9_SPI_FPR_RPE | SPI_FPR_WPE); + break; + default: + printk(BIOS_ERR, "ERROR: Seeking invalid protection!\n"); + return -1; + } + /* Set protected range base and limit */ - reg = spi_fpr(start, end) | SPI_FPR_WPE; + reg = spi_fpr(start, end) | protect_mask; /* Set the FPR register and verify it is protected */ write32(&fpr_base[fpr], reg); reg = read32(&fpr_base[fpr]); - if (!(reg & SPI_FPR_WPE)) { + if (!(reg & protect_mask)) { printk(BIOS_ERR, "ERROR: Unable to set SPI FPR %d\n", fpr); return -1; } |