arch/arm/mach-bcm283x/msg.c

   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 }