Author: mkarcher Date: Thu Jul 22 20:04:19 2010 New Revision: 1099 URL: http://flashrom.org/trac/coreboot/changeset/1099
Log: Move SB600 SPI initialization to sb600spi.c Signed-off-by: Michael Karcher <[email protected]> Acked-by: Carl-Daniel Hailfinger <[email protected]> Modified: trunk/chipset_enable.c trunk/flash.h trunk/sb600spi.c Modified: trunk/chipset_enable.c ============================================================================== --- trunk/chipset_enable.c Thu Jul 22 20:04:15 2010 (r1098) +++ trunk/chipset_enable.c Thu Jul 22 20:04:19 2010 (r1099) @@ -693,10 +693,9 @@ static int enable_flash_sb600(struct pci_dev *dev, const char *name) { - uint32_t tmp, prot; + uint32_t prot; uint8_t reg; - struct pci_dev *smbus_dev; - int has_spi = 1; + int ret; /* Clear ROM protect 0-3. */ for (reg = 0x50; reg < 0x60; reg += 4) { @@ -720,80 +719,9 @@ (prot & 0xfffffc00) + ((prot & 0x3ff) << 8)); } - /* Read SPI_BaseAddr */ - tmp = pci_read_long(dev, 0xa0); - tmp &= 0xffffffe0; /* remove bits 4-0 (reserved) */ - msg_pdbg("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; - - 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); - msg_pdbg("AltSpiCSEnable=%i, SpiRomEnable=%i, " - "AbortEnable=%i\n", tmp & 0x1, (tmp & 0x2) >> 1, - (tmp & 0x4) >> 2); - tmp = (pci_read_byte(dev, 0xba) & 0x4) >> 2; - msg_pdbg("PrefetchEnSPIFromIMC=%i, ", tmp); - - tmp = pci_read_byte(dev, 0xbb); - msg_pdbg("PrefetchEnSPIFromHost=%i, SpiOpEnInLpcMode=%i\n", - tmp & 0x1, (tmp & 0x20) >> 5); - tmp = mmio_readl(sb600_spibar); - msg_pdbg("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 (has_spi && !smbus_dev) { - msg_perr("ERROR: SMBus device not found. Not enabling SPI.\n"); - has_spi = 0; - } - 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); - reg &= 0xC0; - msg_pdbg("GPIO11 used for %s\n", (reg & (1 << 6)) ? "GPIO" : "SPI_DO"); - msg_pdbg("GPIO12 used for %s\n", (reg & (1 << 7)) ? "GPIO" : "SPI_DI"); - if (reg != 0x00) - has_spi = 0; - /* GPIO31/SPI_HOLD and GPIO32/SPI_CS status */ - reg = pci_read_byte(smbus_dev, 0x83); - reg &= 0xC0; - msg_pdbg("GPIO31 used for %s\n", (reg & (1 << 6)) ? "GPIO" : "SPI_HOLD"); - msg_pdbg("GPIO32 used for %s\n", (reg & (1 << 7)) ? "GPIO" : "SPI_CS"); - /* SPI_HOLD is not used on all boards, filter it out. */ - if ((reg & 0x80) != 0x00) - has_spi = 0; - /* GPIO47/SPI_CLK status */ - reg = pci_read_byte(smbus_dev, 0xA7); - reg &= 0x40; - msg_pdbg("GPIO47 used for %s\n", (reg & (1 << 6)) ? "GPIO" : "SPI_CLK"); - if (reg != 0x00) - has_spi = 0; - } - buses_supported = CHIP_BUSTYPE_LPC | CHIP_BUSTYPE_FWH; - if (has_spi) { - buses_supported |= CHIP_BUSTYPE_SPI; - spi_controller = SPI_CONTROLLER_SB600; - } + + ret = sb600_probe_spi(dev); /* Read ROM strap override register. */ OUTB(0x8f, 0xcd6); @@ -830,7 +758,7 @@ OUTB(0x0e, 0xcd7); */ - return 0; + return ret; } static int enable_flash_nvidia_nforce2(struct pci_dev *dev, const char *name) Modified: trunk/flash.h ============================================================================== --- trunk/flash.h Thu Jul 22 20:04:15 2010 (r1098) +++ trunk/flash.h Thu Jul 22 20:04:19 2010 (r1099) @@ -719,11 +719,11 @@ int it8716f_spi_chip_write_256(struct flashchip *flash, uint8_t *buf, int start, int len); /* sb600spi.c */ +int sb600_probe_spi(struct pci_dev *dev); int sb600_spi_send_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr); int sb600_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len); int sb600_spi_write_256(struct flashchip *flash, uint8_t *buf, int start, int len); -extern uint8_t *sb600_spibar; /* wbsio_spi.c */ int wbsio_check_for_spi(void); Modified: trunk/sb600spi.c ============================================================================== --- trunk/sb600spi.c Thu Jul 22 20:04:15 2010 (r1098) +++ trunk/sb600spi.c Thu Jul 22 20:04:19 2010 (r1099) @@ -40,7 +40,7 @@ *}; */ -uint8_t *sb600_spibar = NULL; +static uint8_t *sb600_spibar = NULL; int sb600_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len) { @@ -152,4 +152,86 @@ return 0; } +int sb600_probe_spi(struct pci_dev *dev) +{ + struct pci_dev *smbus_dev; + uint32_t tmp; + uint8_t reg; + /* Read SPI_BaseAddr */ + tmp = pci_read_long(dev, 0xa0); + tmp &= 0xffffffe0; /* remove bits 4-0 (reserved) */ + msg_pdbg("SPI base address is at 0x%x\n", tmp); + + /* If the BAR has address 0, it is unlikely SPI is used. */ + if (!tmp) + return 0; + + /* 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); + msg_pdbg("AltSpiCSEnable=%i, SpiRomEnable=%i, " + "AbortEnable=%i\n", tmp & 0x1, (tmp & 0x2) >> 1, + (tmp & 0x4) >> 2); + tmp = (pci_read_byte(dev, 0xba) & 0x4) >> 2; + msg_pdbg("PrefetchEnSPIFromIMC=%i, ", tmp); + + tmp = pci_read_byte(dev, 0xbb); + msg_pdbg("PrefetchEnSPIFromHost=%i, SpiOpEnInLpcMode=%i\n", + tmp & 0x1, (tmp & 0x20) >> 5); + tmp = mmio_readl(sb600_spibar); + msg_pdbg("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) { + msg_perr("ERROR: SMBus device not found. Not enabling SPI.\n"); + return ERROR_NONFATAL; + } + + /* 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); + reg &= 0xC0; + msg_pdbg("GPIO11 used for %s\n", (reg & (1 << 6)) ? "GPIO" : "SPI_DO"); + msg_pdbg("GPIO12 used for %s\n", (reg & (1 << 7)) ? "GPIO" : "SPI_DI"); + if (reg != 0x00) { + msg_pdbg("Not enabling SPI"); + return 0; + } + /* GPIO31/SPI_HOLD and GPIO32/SPI_CS status */ + reg = pci_read_byte(smbus_dev, 0x83); + reg &= 0xC0; + msg_pdbg("GPIO31 used for %s\n", (reg & (1 << 6)) ? "GPIO" : "SPI_HOLD"); + msg_pdbg("GPIO32 used for %s\n", (reg & (1 << 7)) ? "GPIO" : "SPI_CS"); + /* SPI_HOLD is not used on all boards, filter it out. */ + if ((reg & 0x80) != 0x00) { + msg_pdbg("Not enabling SPI"); + return 0; + } + /* GPIO47/SPI_CLK status */ + reg = pci_read_byte(smbus_dev, 0xA7); + reg &= 0x40; + msg_pdbg("GPIO47 used for %s\n", (reg & (1 << 6)) ? "GPIO" : "SPI_CLK"); + if (reg != 0x00) { + msg_pdbg("Not enabling SPI"); + return 0; + } + + buses_supported |= CHIP_BUSTYPE_SPI; + spi_controller = SPI_CONTROLLER_SB600; + return 0; +} + #endif _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
