1 /* 2 * (C) Copyright 2012 Stephen Warren 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <memalign.h> 9 #include <phys2bus.h> 10 #include <asm/arch/mbox.h> 11 12 struct msg_set_power_state { 13 struct bcm2835_mbox_hdr hdr; 14 struct bcm2835_mbox_tag_set_power_state set_power_state; 15 u32 end_tag; 16 }; 17 18 struct msg_get_clock_rate { 19 struct bcm2835_mbox_hdr hdr; 20 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 21 u32 end_tag; 22 }; 23 24 struct msg_query { 25 struct bcm2835_mbox_hdr hdr; 26 struct bcm2835_mbox_tag_physical_w_h physical_w_h; 27 u32 end_tag; 28 }; 29 30 int bcm2835_power_on_module(u32 module) 31 { 32 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 33 int ret; 34 35 BCM2835_MBOX_INIT_HDR(msg_pwr); 36 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 37 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; 42 43 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 44 &msg_pwr->hdr); 45 if (ret) { 46 printf("bcm2835: Could not set module %u power state\n", 47 module); 48 return -EIO; 49 } 50 51 return 0; 52 } 53 54 int bcm2835_get_mmc_clock(void) 55 { 56 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 57 int ret; 58 59 ret = bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 60 if (ret) 61 return ret; 62 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; 66 67 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 68 if (ret) { 69 printf("bcm2835: Could not query eMMC clock rate\n"); 70 return -EIO; 71 } 72 73 return msg_clk->get_clock_rate.body.resp.rate_hz; 74 } 75 76 int bcm2835_get_video_size(int *widthp, int *heightp) 77 { 78 ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1); 79 int ret; 80 81 BCM2835_MBOX_INIT_HDR(msg_query); 82 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h, 83 GET_PHYSICAL_W_H); 84 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr); 85 if (ret) { 86 printf("bcm2835: Could not query display resolution\n"); 87 return ret; 88 } 89 *widthp = msg_query->physical_w_h.body.resp.width; 90 *heightp = msg_query->physical_w_h.body.resp.height; 91 92 return 0; 93 } 94