diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/southbridge/intel/common/spi.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c index 8cb5e627d5..082a3d7936 100644 --- a/src/southbridge/intel/common/spi.c +++ b/src/southbridge/intel/common/spi.c @@ -83,6 +83,7 @@ typedef struct ich7_spi_regs { uint16_t preop; uint16_t optype; uint8_t opmenu[8]; + uint32_t pbr[3]; } __packed ich7_spi_regs; typedef struct ich9_spi_regs { @@ -134,6 +135,8 @@ typedef struct ich_spi_controller { uint8_t *status; uint16_t *control; uint32_t *bbar; + uint32_t *fpr; + uint8_t fpr_max; } ich_spi_controller; static ich_spi_controller cntlr; @@ -319,6 +322,8 @@ void spi_init(void) cntlr.control = &ich7_spi->spic; cntlr.bbar = &ich7_spi->bbar; cntlr.preop = &ich7_spi->preop; + cntlr.fpr = &ich7_spi->pbr[0]; + cntlr.fpr_max = 3; } else { ich9_spi = (ich9_spi_regs *)(rcrb + 0x3800); cntlr.ich9_spi = ich9_spi; @@ -335,6 +340,8 @@ void spi_init(void) cntlr.control = (uint16_t *)ich9_spi->ssfc; cntlr.bbar = &ich9_spi->bbar; cntlr.preop = &ich9_spi->preop; + cntlr.fpr = &ich9_spi->pr[0]; + cntlr.fpr_max = 5; if (cntlr.hsfs & HSFS_FDV) { writel_ (4, &ich9_spi->fdoc); @@ -959,10 +966,80 @@ static int xfer_vectors(const struct spi_slave *slave, return spi_flash_vector_helper(slave, vectors, count, spi_ctrlr_xfer); } +#define SPI_FPR_SHIFT 12 +#define ICH7_SPI_FPR_MASK 0xfff +#define ICH9_SPI_FPR_MASK 0x1fff +#define SPI_FPR_BASE_SHIFT 0 +#define ICH7_SPI_FPR_LIMIT_SHIFT 12 +#define ICH9_SPI_FPR_LIMIT_SHIFT 16 +#define ICH9_SPI_FPR_RPE (1 << 15) /* Read Protect */ +#define SPI_FPR_WPE (1 << 31) /* Write Protect */ + +static u32 spi_fpr(u32 base, u32 limit) +{ + u32 ret; + u32 mask, limit_shift; + if (IS_ENABLED(CONFIG_SOUTHBRIDGE_INTEL_I82801GX)) { + mask = ICH7_SPI_FPR_MASK; + limit_shift = ICH7_SPI_FPR_LIMIT_SHIFT; + } else { + mask = ICH9_SPI_FPR_MASK; + limit_shift = ICH9_SPI_FPR_LIMIT_SHIFT; + } + ret = ((limit >> SPI_FPR_SHIFT) & mask) << limit_shift; + ret |= ((base >> SPI_FPR_SHIFT) & mask) << SPI_FPR_BASE_SHIFT; + return ret; +} + +/* + * Protect range of SPI flash defined by [start, start+size-1] using Flash + * Protected Range (FPR) register if available. + * 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) +{ + u32 start = region_offset(region); + u32 end = start + region_sz(region) - 1; + u32 reg; + int fpr; + uint32_t *fpr_base; + + fpr_base = cntlr.fpr; + + /* Find first empty FPR */ + for (fpr = 0; fpr < cntlr.fpr_max; fpr++) { + reg = read32(&fpr_base[fpr]); + if (reg == 0) + break; + } + + if (fpr == cntlr.fpr_max) { + printk(BIOS_ERR, "ERROR: No SPI FPR free!\n"); + return -1; + } + + /* Set protected range base and limit */ + reg = spi_fpr(start, end) | SPI_FPR_WPE; + + /* Set the FPR register and verify it is protected */ + write32(&fpr_base[fpr], reg); + reg = read32(&fpr_base[fpr]); + if (!(reg & SPI_FPR_WPE)) { + printk(BIOS_ERR, "ERROR: Unable to set SPI FPR %d\n", fpr); + return -1; + } + + printk(BIOS_INFO, "%s: FPR %d is enabled for range 0x%08x-0x%08x\n", + __func__, fpr, start, end); + return 0; +} + static const struct spi_ctrlr spi_ctrlr = { .xfer_vector = xfer_vectors, .max_xfer_size = member_size(ich9_spi_regs, fdata), .flash_probe = spi_flash_programmer_probe, + .flash_protect = spi_flash_protect, }; const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = { |