drivers/video/msm/mddi_client_toshiba.c

   1 /* drivers/video/msm_fb/mddi_client_toshiba.c
   2  *
   3  * Support for Toshiba TC358720XBG mddi client devices which require no
   4  * special initialization code.
   5  *
   6  * Copyright (C) 2007 Google Incorporated
   7  *
   8  * This software is licensed under the terms of the GNU General Public
   9  * License version 2, as published by the Free Software Foundation, and
  10  * may be copied, distributed, and modified under those terms.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/gpio.h>
  23 #include <linux/sched.h>
  24 #include <linux/slab.h>
  25 #include <mach/msm_fb.h>
  26
  27
  28 #define LCD_CONTROL_BLOCK_BASE 0x110000
  29 #define CMN         (LCD_CONTROL_BLOCK_BASE|0x10)
  30 #define INTFLG      (LCD_CONTROL_BLOCK_BASE|0x18)
  31 #define HCYCLE      (LCD_CONTROL_BLOCK_BASE|0x34)
  32 #define HDE_START   (LCD_CONTROL_BLOCK_BASE|0x3C)
  33 #define VPOS        (LCD_CONTROL_BLOCK_BASE|0xC0)
  34 #define MPLFBUF     (LCD_CONTROL_BLOCK_BASE|0x20)
  35 #define WAKEUP      (LCD_CONTROL_BLOCK_BASE|0x54)
  36 #define WSYN_DLY    (LCD_CONTROL_BLOCK_BASE|0x58)
  37 #define REGENB      (LCD_CONTROL_BLOCK_BASE|0x5C)
  38
  39 #define BASE5 0x150000
  40 #define BASE6 0x160000
  41 #define BASE7 0x170000
  42
  43 #define GPIOIEV     (BASE5 + 0x10)
  44 #define GPIOIE      (BASE5 + 0x14)
  45 #define GPIORIS     (BASE5 + 0x18)
  46 #define GPIOMIS     (BASE5 + 0x1C)
  47 #define GPIOIC      (BASE5 + 0x20)
  48
  49 #define INTMASK     (BASE6 + 0x0C)
  50 #define INTMASK_VWAKEOUT (1U << 0)
  51 #define INTMASK_VWAKEOUT_ACTIVE_LOW (1U << 8)
  52 #define GPIOSEL     (BASE7 + 0x00)
  53 #define GPIOSEL_VWAKEINT (1U << 0)
  54
  55 static DECLARE_WAIT_QUEUE_HEAD(toshiba_vsync_wait);
  56
  57 struct panel_info {
  58         struct msm_mddi_client_data *client_data;
  59         struct platform_device pdev;
  60         struct msm_panel_data panel_data;
  61         struct msmfb_callback *toshiba_callback;
  62         int toshiba_got_int;
  63 };
  64
  65
  66 static void toshiba_request_vsync(struct msm_panel_data *panel_data,
  67                                   struct msmfb_callback *callback)
  68 {
  69         struct panel_info *panel = container_of(panel_data, struct panel_info,
  70                                                 panel_data);
  71         struct msm_mddi_client_data *client_data = panel->client_data;
  72
  73         panel->toshiba_callback = callback;
  74         if (panel->toshiba_got_int) {
  75                 panel->toshiba_got_int = 0;
  76                 client_data->activate_link(client_data);
  77         }
  78 }
  79
  80 static void toshiba_clear_vsync(struct msm_panel_data *panel_data)
  81 {
  82         struct panel_info *panel = container_of(panel_data, struct panel_info,
  83                                                 panel_data);
  84         struct msm_mddi_client_data *client_data = panel->client_data;
  85
  86         client_data->activate_link(client_data);
  87 }
  88
  89 static void toshiba_wait_vsync(struct msm_panel_data *panel_data)
  90 {
  91         struct panel_info *panel = container_of(panel_data, struct panel_info,
  92                                                 panel_data);
  93         struct msm_mddi_client_data *client_data = panel->client_data;
  94
  95         if (panel->toshiba_got_int) {
  96                 panel->toshiba_got_int = 0;
  97                 client_data->activate_link(client_data); /* clears interrupt */
  98         }
  99         if (wait_event_timeout(toshiba_vsync_wait, panel->toshiba_got_int,
 100                                 HZ/2) == 0)
 101                 printk(KERN_ERR "timeout waiting for VSYNC\n");
 102         panel->toshiba_got_int = 0;
 103         /* interrupt clears when screen dma starts */
 104 }
 105
 106 static int toshiba_suspend(struct msm_panel_data *panel_data)
 107 {
 108         struct panel_info *panel = container_of(panel_data, struct panel_info,
 109                                                 panel_data);
 110         struct msm_mddi_client_data *client_data = panel->client_data;
 111
 112         struct msm_mddi_bridge_platform_data *bridge_data =
 113                 client_data->private_client_data;
 114         int ret;
 115
 116         ret = bridge_data->uninit(bridge_data, client_data);
 117         if (ret) {
 118                 printk(KERN_INFO "mddi toshiba client: non zero return from "
 119                         "uninit\n");
 120                 return ret;
 121         }
 122         client_data->suspend(client_data);
 123         return 0;
 124 }
 125
 126 static int toshiba_resume(struct msm_panel_data *panel_data)
 127 {
 128         struct panel_info *panel = container_of(panel_data, struct panel_info,
 129                                                 panel_data);
 130         struct msm_mddi_client_data *client_data = panel->client_data;
 131
 132         struct msm_mddi_bridge_platform_data *bridge_data =
 133                 client_data->private_client_data;
 134         int ret;
 135
 136         client_data->resume(client_data);
 137         ret = bridge_data->init(bridge_data, client_data);
 138         if (ret)
 139                 return ret;
 140         return 0;
 141 }
 142
 143 static int toshiba_blank(struct msm_panel_data *panel_data)
 144 {
 145         struct panel_info *panel = container_of(panel_data, struct panel_info,
 146                                                 panel_data);
 147         struct msm_mddi_client_data *client_data = panel->client_data;
 148         struct msm_mddi_bridge_platform_data *bridge_data =
 149                 client_data->private_client_data;
 150
 151         return bridge_data->blank(bridge_data, client_data);
 152 }
 153
 154 static int toshiba_unblank(struct msm_panel_data *panel_data)
 155 {
 156         struct panel_info *panel = container_of(panel_data, struct panel_info,
 157                                                 panel_data);
 158         struct msm_mddi_client_data *client_data = panel->client_data;
 159         struct msm_mddi_bridge_platform_data *bridge_data =
 160                 client_data->private_client_data;
 161
 162         return bridge_data->unblank(bridge_data, client_data);
 163 }
 164
 165 irqreturn_t toshiba_vsync_interrupt(int irq, void *data)
 166 {
 167         struct panel_info *panel = data;
 168
 169         panel->toshiba_got_int = 1;
 170         if (panel->toshiba_callback) {
 171                 panel->toshiba_callback->func(panel->toshiba_callback);
 172                 panel->toshiba_callback = 0;
 173         }
 174         wake_up(&toshiba_vsync_wait);
 175         return IRQ_HANDLED;
 176 }
 177
 178 static int setup_vsync(struct panel_info *panel,
 179                        int init)
 180 {
 181         int ret;
 182         int gpio = 97;
 183         unsigned int irq;
 184
 185         if (!init) {
 186                 ret = 0;
 187                 goto uninit;
 188         }
 189         ret = gpio_request(gpio, "vsync");
 190         if (ret)
 191                 goto err_request_gpio_failed;
 192
 193         ret = gpio_direction_input(gpio);
 194         if (ret)
 195                 goto err_gpio_direction_input_failed;
 196
 197         ret = irq = gpio_to_irq(gpio);
 198         if (ret < 0)
 199                 goto err_get_irq_num_failed;
 200
 201         ret = request_irq(irq, toshiba_vsync_interrupt, IRQF_TRIGGER_RISING,
 202                           "vsync", panel);
 203         if (ret)
 204                 goto err_request_irq_failed;
 205         printk(KERN_INFO "vsync on gpio %d now %d\n",
 206                gpio, gpio_get_value(gpio));
 207         return 0;
 208
 209 uninit:
 210         free_irq(gpio_to_irq(gpio), panel);
 211 err_request_irq_failed:
 212 err_get_irq_num_failed:
 213 err_gpio_direction_input_failed:
 214         gpio_free(gpio);
 215 err_request_gpio_failed:
 216         return ret;
 217 }
 218
 219 static int mddi_toshiba_probe(struct platform_device *pdev)
 220 {
 221         int ret;
 222         struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
 223         struct msm_mddi_bridge_platform_data *bridge_data =
 224                 client_data->private_client_data;
 225         struct panel_info *panel =
 226                 kzalloc(sizeof(struct panel_info), GFP_KERNEL);
 227         if (!panel)
 228                 return -ENOMEM;
 229         platform_set_drvdata(pdev, panel);
 230
 231         /* mddi_remote_write(mddi, 0, WAKEUP); */
 232         client_data->remote_write(client_data, GPIOSEL_VWAKEINT, GPIOSEL);
 233         client_data->remote_write(client_data, INTMASK_VWAKEOUT, INTMASK);
 234
 235         ret = setup_vsync(panel, 1);
 236         if (ret) {
 237                 dev_err(&pdev->dev, "mddi_bridge_setup_vsync failed\n");
 238                 return ret;
 239         }
 240
 241         panel->client_data = client_data;
 242         panel->panel_data.suspend = toshiba_suspend;
 243         panel->panel_data.resume = toshiba_resume;
 244         panel->panel_data.wait_vsync = toshiba_wait_vsync;
 245         panel->panel_data.request_vsync = toshiba_request_vsync;
 246         panel->panel_data.clear_vsync = toshiba_clear_vsync;
 247         panel->panel_data.blank = toshiba_blank;
 248         panel->panel_data.unblank = toshiba_unblank;
 249         panel->panel_data.fb_data =  &bridge_data->fb_data;
 250         panel->panel_data.caps = MSMFB_CAP_PARTIAL_UPDATES;
 251
 252         panel->pdev.name = "msm_panel";
 253         panel->pdev.id = pdev->id;
 254         panel->pdev.resource = client_data->fb_resource;
 255         panel->pdev.num_resources = 1;
 256         panel->pdev.dev.platform_data = &panel->panel_data;
 257         bridge_data->init(bridge_data, client_data);
 258         platform_device_register(&panel->pdev);
 259
 260         return 0;
 261 }
 262
 263 static int mddi_toshiba_remove(struct platform_device *pdev)
 264 {
 265         struct panel_info *panel = platform_get_drvdata(pdev);
 266
 267         setup_vsync(panel, 0);
 268         kfree(panel);
 269         return 0;
 270 }
 271
 272 static struct platform_driver mddi_client_d263_0000 = {
 273         .probe = mddi_toshiba_probe,
 274         .remove = mddi_toshiba_remove,
 275         .driver = { .name = "mddi_c_d263_0000" },
 276 };
 277
 278 static int __init mddi_client_toshiba_init(void)
 279 {
 280         platform_driver_register(&mddi_client_d263_0000);
 281         return 0;
 282 }
 283
 284 module_init(mddi_client_toshiba_init);
 285