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 struct msg_setup { 31 struct bcm2835_mbox_hdr hdr; 32 struct bcm2835_mbox_tag_physical_w_h physical_w_h; 33 struct bcm2835_mbox_tag_virtual_w_h virtual_w_h; 34 struct bcm2835_mbox_tag_depth depth; 35 struct bcm2835_mbox_tag_pixel_order pixel_order; 36 struct bcm2835_mbox_tag_alpha_mode alpha_mode; 37 struct bcm2835_mbox_tag_virtual_offset virtual_offset; 38 struct bcm2835_mbox_tag_overscan overscan; 39 struct bcm2835_mbox_tag_allocate_buffer allocate_buffer; 40 struct bcm2835_mbox_tag_pitch pitch; 41 u32 end_tag; 42 }; 43 44 int bcm2835_power_on_module(u32 module) 45 { 46 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 47 int ret; 48 49 BCM2835_MBOX_INIT_HDR(msg_pwr); 50 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 51 SET_POWER_STATE); 52 msg_pwr->set_power_state.body.req.device_id = module; 53 msg_pwr->set_power_state.body.req.state = 54 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 55 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 56 57 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 58 &msg_pwr->hdr); 59 if (ret) { 60 printf("bcm2835: Could not set module %u power state\n", 61 module); 62 return -EIO; 63 } 64 65 return 0; 66 } 67 68 int bcm2835_get_mmc_clock(void) 69 { 70 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 71 int ret; 72 73 ret = bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 74 if (ret) 75 return ret; 76 77 BCM2835_MBOX_INIT_HDR(msg_clk); 78 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 79 msg_clk->get_clock_rate.body.req.clock_id = BCM2835_MBOX_CLOCK_ID_EMMC; 80 81 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 82 if (ret) { 83 printf("bcm2835: Could not query eMMC clock rate\n"); 84 return -EIO; 85 } 86 87 return msg_clk->get_clock_rate.body.resp.rate_hz; 88 } 89 90 int bcm2835_get_video_size(int *widthp, int *heightp) 91 { 92 ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1); 93 int ret; 94 95 BCM2835_MBOX_INIT_HDR(msg_query); 96 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h, 97 GET_PHYSICAL_W_H); 98 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr); 99 if (ret) { 100 printf("bcm2835: Could not query display resolution\n"); 101 return ret; 102 } 103 *widthp = msg_query->physical_w_h.body.resp.width; 104 *heightp = msg_query->physical_w_h.body.resp.height; 105 106 return 0; 107 } 108 109 int bcm2835_set_video_params(int *widthp, int *heightp, int depth_bpp, 110 int pixel_order, int alpha_mode, ulong *fb_basep, 111 ulong *fb_sizep, int *pitchp) 112 { 113 ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1); 114 int ret; 115 116 BCM2835_MBOX_INIT_HDR(msg_setup); 117 BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H); 118 msg_setup->physical_w_h.body.req.width = *widthp; 119 msg_setup->physical_w_h.body.req.height = *heightp; 120 BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H); 121 msg_setup->virtual_w_h.body.req.width = *widthp; 122 msg_setup->virtual_w_h.body.req.height = *heightp; 123 BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH); 124 msg_setup->depth.body.req.bpp = 32; 125 BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER); 126 msg_setup->pixel_order.body.req.order = pixel_order; 127 BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE); 128 msg_setup->alpha_mode.body.req.alpha = alpha_mode; 129 BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET); 130 msg_setup->virtual_offset.body.req.x = 0; 131 msg_setup->virtual_offset.body.req.y = 0; 132 BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN); 133 msg_setup->overscan.body.req.top = 0; 134 msg_setup->overscan.body.req.bottom = 0; 135 msg_setup->overscan.body.req.left = 0; 136 msg_setup->overscan.body.req.right = 0; 137 BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER); 138 msg_setup->allocate_buffer.body.req.alignment = 0x100; 139 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH); 140 141 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr); 142 if (ret) { 143 printf("bcm2835: Could not configure display\n"); 144 return ret; 145 } 146 *widthp = msg_setup->physical_w_h.body.resp.width; 147 *heightp = msg_setup->physical_w_h.body.resp.height; 148 *pitchp = msg_setup->pitch.body.resp.pitch; 149 *fb_basep = bus_to_phys( 150 msg_setup->allocate_buffer.body.resp.fb_address); 151 *fb_sizep = msg_setup->allocate_buffer.body.resp.fb_size; 152 153 return 0; 154 } 155