2 * (C) Copyright 2012 Stephen Warren
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/arch/mbox.h>
12 struct msg_set_power_state {
13 struct bcm2835_mbox_hdr hdr;
14 struct bcm2835_mbox_tag_set_power_state set_power_state;
18 struct msg_get_clock_rate {
19 struct bcm2835_mbox_hdr hdr;
20 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
25 struct bcm2835_mbox_hdr hdr;
26 struct bcm2835_mbox_tag_physical_w_h physical_w_h;
30 int bcm2835_power_on_module(u32 module)
32 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1);
35 BCM2835_MBOX_INIT_HDR(msg_pwr);
36 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state,
38 msg_pwr->set_power_state.body.req.device_id = module;
39 msg_pwr->set_power_state.body.req.state =
40 BCM2835_MBOX_SET_POWER_STATE_REQ_ON |
41 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT;
43 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN,
46 printf("bcm2835: Could not set module %u power state\n",
54 int bcm2835_get_mmc_clock(void)
56 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1);
59 ret = bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI);
63 BCM2835_MBOX_INIT_HDR(msg_clk);
64 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE);
65 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC;
67 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr);
69 printf("bcm2835: Could not query eMMC clock rate\n");
73 return msg_clk->get_clock_rate.body.resp.rate_hz;
76 int bcm2835_get_video_size(int *widthp, int *heightp)
78 ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1);
81 BCM2835_MBOX_INIT_HDR(msg_query);
82 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
84 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
86 printf("bcm2835: Could not query display resolution\n");
89 *widthp = msg_query->physical_w_h.body.resp.width;
90 *heightp = msg_query->physical_w_h.body.resp.height;