arch/arm/mach-bcm283x/msg.c

   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(u32 clock_id)
  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 = clock_id;
  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 }