msg.c 4.6 KB

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