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