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authorJens Rottmann <JRottmann@LiPPERTembedded.de>2013-03-07 19:02:15 +0100
committerStefan Reinauer <stefan.reinauer@coreboot.org>2013-03-08 00:56:19 +0100
commit00d673d165006b28bbbe5b2d84ef80d8665d8f34 (patch)
tree8029dce6c1c0ed034c3c2d966939cf8572d95290 /src/mainboard/lippert/toucan-af
parent45f72ce60f41a655514c29698678cf3c1fb0c1a9 (diff)
FrontRunner/Toucan-AF: lower SPI speed to 22 MHz
The Hudson-E1's default SPI speed for normal i.e. non-fast reads is 66 MHz, but the SST 25VF032B datasheet allows max. 25. Lower the speed to 22 MHz, otherwise BIOS flashing fails. Change-Id: I22e87d833a3ebd316b6e873595a2480831533ab1 Signed-off-by: Jens Rottmann <JRottmann@LiPPERTembedded.de> Reviewed-on: http://review.coreboot.org/2605 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/mainboard/lippert/toucan-af')
-rw-r--r--src/mainboard/lippert/toucan-af/mainboard.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mainboard/lippert/toucan-af/mainboard.c b/src/mainboard/lippert/toucan-af/mainboard.c
index 27952fa33d..367397e97c 100644
--- a/src/mainboard/lippert/toucan-af/mainboard.c
+++ b/src/mainboard/lippert/toucan-af/mainboard.c
@@ -56,6 +56,7 @@ static int smb_write_blk(u8 slave, u8 command, u8 length, const u8 *data)
static void init(struct device *dev)
{
+ volatile u8 *spi_base; // base addr of Hudson's SPI host controller
int i;
printk(BIOS_DEBUG, CONFIG_MAINBOARD_PART_NUMBER " ENTER %s\n", __func__);
@@ -90,6 +91,10 @@ static void init(struct device *dev)
printk(BIOS_INFO, "Board revision ID: %u\n",
fch_gpio_state(58)<<2 | fch_gpio_state(57)<<1 | fch_gpio_state(56));
+ /* Lower SPI speed from default 66 to 22 MHz for SST 25VF032B */
+ spi_base = (u8*)(pci_read_config32(dev_find_slot(0, PCI_DEVFN(0x14, 3)), 0xA0) & 0xFFFFFFE0);
+ spi_base[0x0D] = (spi_base[0x0D] & ~0x30) | 0x20; // NormSpeed in SPI_Cntrl1 register
+
/* Notify the SMC we're alive and kicking, or after a while it will
* effect a power cycle and switch to the alternate BIOS chip.
* Should be done as late as possible. */