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authorStephen Warren <swarren@wwwdotorg.org>2013-01-29 16:37:42 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2013-03-20 15:32:16 +0100
commit131a1e603b3a8438b84b41940bc6a2051a36e087 (patch)
treee1b9f5bbdeb6043d780c212bcca814a8ba96b90a /board/raspberrypi
parent9a4fbe4fbdeb3ffadeb277236c672c2712443a1b (diff)
ARM: rpi_b: enable SD controller, add related env/cmds
Enable the SD controller driver for the Raspberry Pi. Enable a number of useful MMC, partition, and filesystem-related commands. Set up the environment to provide standard locations for loading a kernel, DTB, etc. Provide a boot command that loads and executes boot.scr.uimg from the SD card; this is written considering future extensibilty to USB storage. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Diffstat (limited to 'board/raspberrypi')
-rw-r--r--board/raspberrypi/rpi_b/rpi_b.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/board/raspberrypi/rpi_b/rpi_b.c b/board/raspberrypi/rpi_b/rpi_b.c
index 3c654a1ac1e..6b3e095ba89 100644
--- a/board/raspberrypi/rpi_b/rpi_b.c
+++ b/board/raspberrypi/rpi_b/rpi_b.c
@@ -16,6 +16,7 @@
#include <common.h>
#include <asm/arch/mbox.h>
+#include <asm/arch/sdhci.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -26,6 +27,12 @@ struct msg_get_arm_mem {
u32 end_tag;
};
+struct msg_get_clock_rate {
+ struct bcm2835_mbox_hdr hdr;
+ struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
+ u32 end_tag;
+};
+
int dram_init(void)
{
ALLOC_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1, 16);
@@ -51,3 +58,22 @@ int board_init(void)
return 0;
}
+
+int board_mmc_init(void)
+{
+ ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16);
+ int ret;
+
+ BCM2835_MBOX_INIT_HDR(msg_clk);
+ BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
+ msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
+
+ ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
+ if (ret) {
+ printf("bcm2835: Could not query eMMC clock rate\n");
+ return -1;
+ }
+
+ return bcm2835_sdhci_init(BCM2835_SDHCI_BASE,
+ msg_clk->get_clock_rate.body.resp.rate_hz);
+}