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