From: Simon Glass Date: Sat, 4 Jul 2015 00:28:22 +0000 (-0600) Subject: dm: spi: Correct BIOS protection logic for ICH9 X-Git-Tag: v2015.10-rc1~190^2~11 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=507879280750fc4af5e5fd0c4387147d286ff6f7;p=oweals%2Fu-boot.git dm: spi: Correct BIOS protection logic for ICH9 The logic is incorrect and currently has no effect. Fix it so that we can write to SPI flash, since by default it is write-protected. Signed-off-by: Simon Glass Reviewed-by: Bin Meng Tested-by: Andrew Bradford --- diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c index 66a5cbaaa1..2e388e7ad9 100644 --- a/drivers/spi/ich.c +++ b/drivers/spi/ich.c @@ -40,6 +40,7 @@ struct ich_spi_priv { int status; int control; int bbar; + int bcr; uint32_t *pr; /* only for ich9 */ int speed; /* pointer to speed control */ ulong max_speed; /* Maximum bus speed in MHz */ @@ -239,6 +240,7 @@ static int ich_init_controller(struct ich_spi_platdata *plat, ctlr->speed = ctlr->control + 2; ctlr->bbar = offsetof(struct ich9_spi_regs, bbar); ctlr->preop = offsetof(struct ich9_spi_regs, preop); + ctlr->bcr = offsetof(struct ich9_spi_regs, bcr); ctlr->pr = &ich9_spi->pr[0]; ctlr->base = ich9_spi; } else { @@ -688,13 +690,10 @@ static int ich_spi_probe(struct udevice *bus) * v9, deassert SMM BIOS Write Protect Disable. */ if (plat->use_sbase) { - struct ich9_spi_regs *ich9_spi; - - ich9_spi = priv->base; - bios_cntl = ich_readb(priv, ich9_spi->bcr); + bios_cntl = ich_readb(priv, priv->bcr); bios_cntl &= ~(1 << 5); /* clear Enable InSMM_STS (EISS) */ bios_cntl |= 1; /* Write Protect Disable (WPD) */ - ich_writeb(priv, bios_cntl, ich9_spi->bcr); + ich_writeb(priv, bios_cntl, priv->bcr); } else { pci_read_config_byte(plat->dev, 0xdc, &bios_cntl); if (plat->ich_version == 9)