arch/arm/mach-omap2/display.c

   1 /*
   2  * OMAP2plus display device setup / initialization.
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   5  *      Senthilvadivu Guruswamy
   6  *      Sumit Semwal
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13  * kind, whether express or implied; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/io.h>
  22 #include <linux/clk.h>
  23 #include <linux/err.h>
  24
  25 #include <video/omapdss.h>
  26 #include <plat/omap_hwmod.h>
  27 #include <plat/omap_device.h>
  28 #include <plat/omap-pm.h>
  29
  30 static struct platform_device omap_display_device = {
  31         .name          = "omapdss",
  32         .id            = -1,
  33         .dev            = {
  34                 .platform_data = NULL,
  35         },
  36 };
  37
  38 struct omap_dss_hwmod_data {
  39         const char *oh_name;
  40         const char *dev_name;
  41         const int id;
  42 };
  43
  44 static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initdata = {
  45         { "dss_core", "omapdss_dss", -1 },
  46         { "dss_dispc", "omapdss_dispc", -1 },
  47         { "dss_rfbi", "omapdss_rfbi", -1 },
  48         { "dss_venc", "omapdss_venc", -1 },
  49 };
  50
  51 static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initdata = {
  52         { "dss_core", "omapdss_dss", -1 },
  53         { "dss_dispc", "omapdss_dispc", -1 },
  54         { "dss_rfbi", "omapdss_rfbi", -1 },
  55         { "dss_venc", "omapdss_venc", -1 },
  56         { "dss_dsi1", "omapdss_dsi1", -1 },
  57 };
  58
  59 static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = {
  60         { "dss_core", "omapdss_dss", -1 },
  61         { "dss_dispc", "omapdss_dispc", -1 },
  62         { "dss_rfbi", "omapdss_rfbi", -1 },
  63         { "dss_venc", "omapdss_venc", -1 },
  64         { "dss_dsi1", "omapdss_dsi1", -1 },
  65         { "dss_dsi2", "omapdss_dsi2", -1 },
  66         { "dss_hdmi", "omapdss_hdmi", -1 },
  67 };
  68
  69 int __init omap_display_init(struct omap_dss_board_info *board_data)
  70 {
  71         int r = 0;
  72         struct omap_hwmod *oh;
  73         struct platform_device *pdev;
  74         int i, oh_count;
  75         struct omap_display_platform_data pdata;
  76         const struct omap_dss_hwmod_data *curr_dss_hwmod;
  77
  78         memset(&pdata, 0, sizeof(pdata));
  79
  80         if (cpu_is_omap24xx()) {
  81                 curr_dss_hwmod = omap2_dss_hwmod_data;
  82                 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data);
  83         } else if (cpu_is_omap34xx()) {
  84                 curr_dss_hwmod = omap3_dss_hwmod_data;
  85                 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data);
  86         } else {
  87                 curr_dss_hwmod = omap4_dss_hwmod_data;
  88                 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data);
  89         }
  90
  91         pdata.board_data = board_data;
  92         pdata.board_data->get_context_loss_count =
  93                 omap_pm_get_dev_context_loss_count;
  94
  95         for (i = 0; i < oh_count; i++) {
  96                 oh = omap_hwmod_lookup(curr_dss_hwmod[i].oh_name);
  97                 if (!oh) {
  98                         pr_err("Could not look up %s\n",
  99                                 curr_dss_hwmod[i].oh_name);
 100                         return -ENODEV;
 101                 }
 102
 103                 pdev = omap_device_build(curr_dss_hwmod[i].dev_name,
 104                                 curr_dss_hwmod[i].id, oh, &pdata,
 105                                 sizeof(struct omap_display_platform_data),
 106                                 NULL, 0, 0);
 107
 108                 if (WARN((IS_ERR(pdev)), "Could not build omap_device for %s\n",
 109                                 curr_dss_hwmod[i].oh_name))
 110                         return -ENODEV;
 111         }
 112         omap_display_device.dev.platform_data = board_data;
 113
 114         r = platform_device_register(&omap_display_device);
 115         if (r < 0)
 116                 printk(KERN_ERR "Unable to register OMAP-Display device\n");
 117
 118         return r;
 119 }