diff options
Diffstat (limited to 'chipset_enable.c')
| -rw-r--r-- | chipset_enable.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/chipset_enable.c b/chipset_enable.c index 6220e36..6452f82 100644 --- a/chipset_enable.c +++ b/chipset_enable.c @@ -692,25 +692,49 @@ static int enable_flash_sb600(struct pci_dev *dev, const char *name) /* Read SPI_BaseAddr */ tmp = pci_read_long(dev, 0xa0); - tmp &= 0xfffffff0; /* remove low 4 bits (reserved) */ + tmp &= 0xffffffe0; /* remove bits 4-0 (reserved) */ printf_debug("SPI base address is at 0x%x\n", tmp); /* If the BAR has address 0, it is unlikely SPI is used. */ if (!tmp) has_spi = 0; - /* Physical memory can only be mapped at page (4k) boundaries */ - sb600_spibar = physmap("SB600 SPI registers", tmp & 0xfffff000, 0x1000); - /* The low bits of the SPI base address are used as offset into the mapped page */ - sb600_spibar += tmp & 0xfff; + if (has_spi) { + /* Physical memory has to be mapped at page (4k) boundaries. */ + sb600_spibar = physmap("SB600 SPI registers", tmp & 0xfffff000, + 0x1000); + /* The low bits of the SPI base address are used as offset into + * the mapped page. + */ + sb600_spibar += tmp & 0xfff; + + tmp = pci_read_long(dev, 0xa0); + printf_debug("AltSpiCSEnable=%i, SpiRomEnable=%i, " + "AbortEnable=%i\n", tmp & 0x1, (tmp & 0x2) >> 1, + (tmp & 0x4) >> 2); + tmp = (pci_read_byte(dev, 0xba) & 0x4) >> 2; + printf_debug("PrefetchEnSPIFromIMC=%i, ", tmp); + + tmp = pci_read_byte(dev, 0xbb); + printf_debug("PrefetchEnSPIFromHost=%i, SpiOpEnInLpcMode=%i\n", + tmp & 0x1, (tmp & 0x20) >> 5); + tmp = mmio_readl(sb600_spibar); + printf_debug("SpiArbEnable=%i, SpiAccessMacRomEn=%i, " + "SpiHostAccessRomEn=%i, ArbWaitCount=%i, " + "SpiBridgeDisable=%i, DropOneClkOnRd=%i\n", + (tmp >> 19) & 0x1, (tmp >> 22) & 0x1, + (tmp >> 23) & 0x1, (tmp >> 24) & 0x7, + (tmp >> 27) & 0x1, (tmp >> 28) & 0x1); + } /* Look for the SMBus device. */ smbus_dev = pci_dev_find(0x1002, 0x4385); - if (!smbus_dev) { + if (has_spi && !smbus_dev) { fprintf(stderr, "ERROR: SMBus device not found. Not enabling SPI.\n"); has_spi = 0; - } else { + } + if (has_spi) { /* Note about the bit tests below: If a bit is zero, the GPIO is SPI. */ /* GPIO11/SPI_DO and GPIO12/SPI_DI status */ reg = pci_read_byte(smbus_dev, 0xAB); |
