From 131a1e603b3a8438b84b41940bc6a2051a36e087 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Tue, 29 Jan 2013 16:37:42 +0000 Subject: 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 --- board/raspberrypi/rpi_b/rpi_b.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'board') diff --git a/board/raspberrypi/rpi_b/rpi_b.c b/board/raspberrypi/rpi_b/rpi_b.c index 3c654a1..6b3e095 100644 --- a/board/raspberrypi/rpi_b/rpi_b.c +++ b/board/raspberrypi/rpi_b/rpi_b.c @@ -16,6 +16,7 @@ #include #include +#include #include 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); +} -- cgit v1.1