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authorMario Scheithauer <mario.scheithauer@siemens.com>2019-07-17 09:40:33 +0200
committerWerner Zeh <werner.zeh@siemens.com>2019-07-18 11:46:41 +0000
commit7815c074b4689d858fde7c8e02153c40de79645e (patch)
tree3201bee12f3e762a9c19a9a71512e9c41afd8b90 /src/mainboard/siemens
parent23af8bac7242955698115c57323879f48b58604d (diff)
mb/siemens/mc_apl1: Disable all UHS-I SD-Card speed modes
The limitation for SD-Card was originally only made for mc_apl2 mainboard. Since other mc_apl mainboards also use the SD-Card interface, the speed mode setting is made in the parent mainboard_final. In additional, all UHS-I bus speed modes are disabled because of a limitation for industry use cases. This means that only HS mode is permitted. Change-Id: I2f1b51f13a53c2507c52d6a169d6384b8570b3bc Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/34377 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Diffstat (limited to 'src/mainboard/siemens')
-rw-r--r--src/mainboard/siemens/mc_apl1/mainboard.c19
-rw-r--r--src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c19
2 files changed, 19 insertions, 19 deletions
diff --git a/src/mainboard/siemens/mc_apl1/mainboard.c b/src/mainboard/siemens/mc_apl1/mainboard.c
index c931e1008a..22d37bfdc2 100644
--- a/src/mainboard/siemens/mc_apl1/mainboard.c
+++ b/src/mainboard/siemens/mc_apl1/mainboard.c
@@ -83,6 +83,10 @@
#define SPI_REG_OPMENU_L 0xa8
#define SPI_REG_OPMENU_H 0xac
+#define SD_CAP_BYP 0x810
+#define SD_CAP_BYP_EN 0x5A
+#define SD_CAP_BYP_REG1 0x814
+
/** \brief This function can decide if a given MAC address is valid or not.
* Currently, addresses filled with 0xff or 0x00 are not valid.
* @param mac Buffer to the MAC address to check
@@ -265,6 +269,21 @@ static void mainboard_final(void *chip_info)
((SPI_OPTYPE << 16) | SPI_OPPREFIX));
write32((spi_base + SPI_REG_OPMENU_L), SPI_OPMENU_LOWER);
write32((spi_base + SPI_REG_OPMENU_H), SPI_OPMENU_UPPER);
+
+ /* Set SD-Card speed to HS mode only. */
+ dev = pcidev_path_on_root(PCH_DEVFN_SDCARD);
+ if (dev) {
+ uint32_t reg;
+ struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0);
+ if (!res)
+ return;
+
+ write32(res2mmio(res, SD_CAP_BYP, 0), SD_CAP_BYP_EN);
+ reg = read32(res2mmio(res, SD_CAP_BYP_REG1, 0));
+ /* Disable all UHS-I SD-Card speed modes, keep only HS mode. */
+ reg &= ~0x2000f800;
+ write32(res2mmio(res, SD_CAP_BYP_REG1, 0), reg);
+ }
}
/* The following function performs board specific things. */
diff --git a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c
index 7890ee0211..2502a921fe 100644
--- a/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c
+++ b/src/mainboard/siemens/mc_apl1/variants/mc_apl2/mainboard.c
@@ -26,10 +26,6 @@
#include <soc/pci_devs.h>
#include <types.h>
-#define SD_CAP_BYP 0x810
-#define SD_CAP_BYP_EN 0x5A
-#define SD_CAP_BYP_REG1 0x814
-
void variant_mainboard_final(void)
{
struct device *dev;
@@ -42,21 +38,6 @@ void variant_mainboard_final(void)
cmd |= PCI_COMMAND_MASTER;
pci_write_config16(dev, PCI_COMMAND, cmd);
}
-
- /* Reduce SD-Card speed to DDR50 because of PCB constraints. */
- dev = pcidev_path_on_root(PCH_DEVFN_SDCARD);
- if (dev) {
- uint32_t reg;
- struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0);
- if (!res)
- return;
-
- write32(res2mmio(res, SD_CAP_BYP, 0), SD_CAP_BYP_EN);
- reg = read32(res2mmio(res, SD_CAP_BYP_REG1, 0));
- /* Disable HS400 and SDR104, keep SDR50 and DDR50 modes. */
- reg &= ~0x20005800;
- write32(res2mmio(res, SD_CAP_BYP_REG1, 0), reg);
- }
}
static void wait_for_legacy_dev(void *unused)