1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2012 Stephen Warren 4 */ 5 6 #include <common.h> 7 #include <memalign.h> 8 #include <phys2bus.h> 9 #include <asm/arch/mbox.h> 10 11 struct msg_set_power_state { 12 struct bcm2835_mbox_hdr hdr; 13 struct bcm2835_mbox_tag_set_power_state set_power_state; 14 u32 end_tag; 15 }; 16 17 struct msg_get_clock_rate { 18 struct bcm2835_mbox_hdr hdr; 19 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate; 20 u32 end_tag; 21 }; 22 23 struct msg_query { 24 struct bcm2835_mbox_hdr hdr; 25 struct bcm2835_mbox_tag_physical_w_h physical_w_h; 26 u32 end_tag; 27 }; 28 29 struct msg_setup { 30 struct bcm2835_mbox_hdr hdr; 31 struct bcm2835_mbox_tag_physical_w_h physical_w_h; 32 struct bcm2835_mbox_tag_virtual_w_h virtual_w_h; 33 struct bcm2835_mbox_tag_depth depth; 34 struct bcm2835_mbox_tag_pixel_order pixel_order; 35 struct bcm2835_mbox_tag_alpha_mode alpha_mode; 36 struct bcm2835_mbox_tag_virtual_offset virtual_offset; 37 struct bcm2835_mbox_tag_overscan overscan; 38 struct bcm2835_mbox_tag_allocate_buffer allocate_buffer; 39 struct bcm2835_mbox_tag_pitch pitch; 40 u32 end_tag; 41 }; 42 43 int bcm2835_power_on_module(u32 module) 44 { 45 ALLOC_CACHE_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1); 46 int ret; 47 48 BCM2835_MBOX_INIT_HDR(msg_pwr); 49 BCM2835_MBOX_INIT_TAG(&msg_pwr->set_power_state, 50 SET_POWER_STATE); 51 msg_pwr->set_power_state.body.req.device_id = module; 52 msg_pwr->set_power_state.body.req.state = 53 BCM2835_MBOX_SET_POWER_STATE_REQ_ON | 54 BCM2835_MBOX_SET_POWER_STATE_REQ_WAIT; 55 56 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, 57 &msg_pwr->hdr); 58 if (ret) { 59 printf("bcm2835: Could not set module %u power state\n", 60 module); 61 return -EIO; 62 } 63 64 return 0; 65 } 66 67 int bcm2835_get_mmc_clock(u32 clock_id) 68 { 69 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_clock_rate, msg_clk, 1); 70 int ret; 71 72 ret = bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_SDHCI); 73 if (ret) 74 return ret; 75 76 BCM2835_MBOX_INIT_HDR(msg_clk); 77 BCM2835_MBOX_INIT_TAG(&msg_clk->get_clock_rate, GET_CLOCK_RATE); 78 msg_clk->get_clock_rate.body.req.clock_id = clock_id; 79 80 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_clk->hdr); 81 if (ret) { 82 printf("bcm2835: Could not query eMMC clock rate\n"); 83 return -EIO; 84 } 85 86 return msg_clk->get_clock_rate.body.resp.rate_hz; 87 } 88 89 int bcm2835_get_video_size(int *widthp, int *heightp) 90 { 91 ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1); 92 int ret; 93 94 BCM2835_MBOX_INIT_HDR(msg_query); 95 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h, 96 GET_PHYSICAL_W_H); 97 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr); 98 if (ret) { 99 printf("bcm2835: Could not query display resolution\n"); 100 return ret; 101 } 102 *widthp = msg_query->physical_w_h.body.resp.width; 103 *heightp = msg_query->physical_w_h.body.resp.height; 104 105 return 0; 106 } 107 108 int bcm2835_set_video_params(int *widthp, int *heightp, int depth_bpp, 109 int pixel_order, int alpha_mode, ulong *fb_basep, 110 ulong *fb_sizep, int *pitchp) 111 { 112 ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1); 113 int ret; 114 115 BCM2835_MBOX_INIT_HDR(msg_setup); 116 BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H); 117 msg_setup->physical_w_h.body.req.width = *widthp; 118 msg_setup->physical_w_h.body.req.height = *heightp; 119 BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H); 120 msg_setup->virtual_w_h.body.req.width = *widthp; 121 msg_setup->virtual_w_h.body.req.height = *heightp; 122 BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH); 123 msg_setup->depth.body.req.bpp = 32; 124 BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER); 125 msg_setup->pixel_order.body.req.order = pixel_order; 126 BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE); 127 msg_setup->alpha_mode.body.req.alpha = alpha_mode; 128 BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET); 129 msg_setup->virtual_offset.body.req.x = 0; 130 msg_setup->virtual_offset.body.req.y = 0; 131 BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN); 132 msg_setup->overscan.body.req.top = 0; 133 msg_setup->overscan.body.req.bottom = 0; 134 msg_setup->overscan.body.req.left = 0; 135 msg_setup->overscan.body.req.right = 0; 136 BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER); 137 msg_setup->allocate_buffer.body.req.alignment = 0x100; 138 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH); 139 140 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr); 141 if (ret) { 142 printf("bcm2835: Could not configure display\n"); 143 return ret; 144 } 145 *widthp = msg_setup->physical_w_h.body.resp.width; 146 *heightp = msg_setup->physical_w_h.body.resp.height; 147 *pitchp = msg_setup->pitch.body.resp.pitch; 148 *fb_basep = bus_to_phys( 149 msg_setup->allocate_buffer.body.resp.fb_address); 150 *fb_sizep = msg_setup->allocate_buffer.body.resp.fb_size; 151 152 return 0; 153 } 154