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authorStephen Warren <swarren@wwwdotorg.org>2014-01-13 19:50:11 -0700
committerTom Rini <trini@ti.com>2014-01-20 17:11:39 -0500
commitf66f2aa265f00d4fcf49cdfb23bcfd64360b291d (patch)
treef5328f0829d1c27e486982c82361046f1b2f83c9 /board/raspberrypi/rpi_b/rpi_b.c
parent86a8b3a207ac34f453607a52a4d702bb67789ea2 (diff)
ARM: rpi_b: power on SDHCI and USB HW modules
Send RPC commands to the VideoCore to turn on the SDHCI and USB modules. For SDHCI this isn't needed in practice, since the firmware already turned on the power in order to load U-Boot. However, it's best to be explicit. For USB, this is necessary, since the module isn't powered otherwise. This will allow the kernel USB driver to work. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Diffstat (limited to 'board/raspberrypi/rpi_b/rpi_b.c')
-rw-r--r--board/raspberrypi/rpi_b/rpi_b.c34
1 files changed, 33 insertions, 1 deletions
diff --git a/board/raspberrypi/rpi_b/rpi_b.c b/board/raspberrypi/rpi_b/rpi_b.c
index 16d442aa62..f33fae9170 100644
--- a/board/raspberrypi/rpi_b/rpi_b.c
+++ b/board/raspberrypi/rpi_b/rpi_b.c
@@ -29,6 +29,12 @@ struct msg_get_arm_mem {
u32 end_tag;
};
+struct msg_set_power_state {
+ struct bcm2835_mbox_hdr hdr;
+ struct bcm2835_mbox_tag_set_power_state set_power_state;
+ u32 end_tag;
+};
+
struct msg_get_clock_rate {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
@@ -54,11 +60,35 @@ int dram_init(void)
return 0;
}
+static int power_on_module(u32 module)
+{
+ ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16);
+ int ret;
+
+ BCM2835_MBOX_INIT_HDR(msg_pwr);
+ BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
+ SET_POWER_STATE);
+ msg_pwr->set_power_state.body.req.device_id = module;
+ msg_pwr->set_power_state.body.req.state =
+ BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
+ BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
+
+ ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
+ &msg_pwr->hdr);
+ if (ret) {
+ printf("bcm2835: Could not set module %u power state\n",
+ module);
+ return -1;
+ }
+
+ return 0;
+}
+
int board_init(void)
{
gd->bd->bi_boot_params = 0x100;
- return 0;
+ return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
}
int board_mmc_init(void)
@@ -66,6 +96,8 @@ int board_mmc_init(void)
ALLOC_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1, 16);
int ret;
+ power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
+
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;