arm: rpi: Add a file to handle messages
The bcm283x chips provide a way for the ARM core to communicate with the
graphics processor, which is in charge of many things. This is handled by
way of a message prototcol.
At present the code for sending message (and receiving a reply) is spread
around U-Boot, primarily in the board file. This means that sending a
message from a driver requires duplicating the code.
Create a new message implementation with a function to support powering on
a subsystem as a starting point.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c
index 2146534..d0d9a97 100644
--- a/board/raspberrypi/rpi/rpi.c
+++ b/board/raspberrypi/rpi/rpi.c
@@ -16,6 +16,7 @@
#include <mmc.h>
#include <asm/gpio.h>
#include <asm/arch/mbox.h>
+#include <asm/arch/msg.h>
#include <asm/arch/sdhci.h>
#include <asm/global_data.h>
#include <dm/platform_data/serial_bcm283x_mu.h>
@@ -53,12 +54,6 @@
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;
@@ -365,30 +360,6 @@
return 0;
}
-static int power_on_module(u32 module)
-{
- ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
- 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;
-}
-
static void get_board_rev(void)
{
ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
@@ -492,7 +463,7 @@
gd->bd->bi_boot_params = 0x100;
- return power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
+ return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
}
int board_mmc_init(bd_t *bis)
@@ -500,7 +471,7 @@
ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
int ret;
- power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
+ bcm2835_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);