drivers/video/omap2/displays-new/panel-sharp-ls037v7dw01.c

   1 /*
   2  * LCD panel driver for Sharp LS037V7DW01
   3  *
   4  * Copyright (C) 2013 Texas Instruments
   5  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11
  12 #include <linux/delay.h>
  13 #include <linux/gpio.h>
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/slab.h>
  17
  18 #include <video/omapdss.h>
  19 #include <video/omap-panel-data.h>
  20
  21 struct panel_drv_data {
  22         struct omap_dss_device dssdev;
  23         struct omap_dss_device *in;
  24
  25         int data_lines;
  26
  27         struct omap_video_timings videomode;
  28
  29         int resb_gpio;
  30         int ini_gpio;
  31         int mo_gpio;
  32         int lr_gpio;
  33         int ud_gpio;
  34 };
  35
  36 static const struct omap_video_timings sharp_ls_timings = {
  37         .x_res = 480,
  38         .y_res = 640,
  39
  40         .pixel_clock    = 19200,
  41
  42         .hsw            = 2,
  43         .hfp            = 1,
  44         .hbp            = 28,
  45
  46         .vsw            = 1,
  47         .vfp            = 1,
  48         .vbp            = 1,
  49
  50         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  51         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  52         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  53         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  54         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
  55 };
  56
  57 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
  58
  59 static int sharp_ls_connect(struct omap_dss_device *dssdev)
  60 {
  61         struct panel_drv_data *ddata = to_panel_data(dssdev);
  62         struct omap_dss_device *in = ddata->in;
  63         int r;
  64
  65         if (omapdss_device_is_connected(dssdev))
  66                 return 0;
  67
  68         r = in->ops.dpi->connect(in, dssdev);
  69         if (r)
  70                 return r;
  71
  72         return 0;
  73 }
  74
  75 static void sharp_ls_disconnect(struct omap_dss_device *dssdev)
  76 {
  77         struct panel_drv_data *ddata = to_panel_data(dssdev);
  78         struct omap_dss_device *in = ddata->in;
  79
  80         if (!omapdss_device_is_connected(dssdev))
  81                 return;
  82
  83         in->ops.dpi->disconnect(in, dssdev);
  84 }
  85
  86 static int sharp_ls_enable(struct omap_dss_device *dssdev)
  87 {
  88         struct panel_drv_data *ddata = to_panel_data(dssdev);
  89         struct omap_dss_device *in = ddata->in;
  90         int r;
  91
  92         if (!omapdss_device_is_connected(dssdev))
  93                 return -ENODEV;
  94
  95         if (omapdss_device_is_enabled(dssdev))
  96                 return 0;
  97
  98         in->ops.dpi->set_data_lines(in, ddata->data_lines);
  99         in->ops.dpi->set_timings(in, &ddata->videomode);
 100
 101         r = in->ops.dpi->enable(in);
 102         if (r)
 103                 return r;
 104
 105         /* wait couple of vsyncs until enabling the LCD */
 106         msleep(50);
 107
 108         if (gpio_is_valid(ddata->resb_gpio))
 109                 gpio_set_value_cansleep(ddata->resb_gpio, 1);
 110
 111         if (gpio_is_valid(ddata->ini_gpio))
 112                 gpio_set_value_cansleep(ddata->ini_gpio, 1);
 113
 114         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 115
 116         return 0;
 117 }
 118
 119 static void sharp_ls_disable(struct omap_dss_device *dssdev)
 120 {
 121         struct panel_drv_data *ddata = to_panel_data(dssdev);
 122         struct omap_dss_device *in = ddata->in;
 123
 124         if (!omapdss_device_is_enabled(dssdev))
 125                 return;
 126
 127         if (gpio_is_valid(ddata->ini_gpio))
 128                 gpio_set_value_cansleep(ddata->ini_gpio, 0);
 129
 130         if (gpio_is_valid(ddata->resb_gpio))
 131                 gpio_set_value_cansleep(ddata->resb_gpio, 0);
 132
 133         /* wait at least 5 vsyncs after disabling the LCD */
 134
 135         msleep(100);
 136
 137         in->ops.dpi->disable(in);
 138
 139         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 140 }
 141
 142 static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
 143                 struct omap_video_timings *timings)
 144 {
 145         struct panel_drv_data *ddata = to_panel_data(dssdev);
 146         struct omap_dss_device *in = ddata->in;
 147
 148         ddata->videomode = *timings;
 149         dssdev->panel.timings = *timings;
 150
 151         in->ops.dpi->set_timings(in, timings);
 152 }
 153
 154 static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
 155                 struct omap_video_timings *timings)
 156 {
 157         struct panel_drv_data *ddata = to_panel_data(dssdev);
 158
 159         *timings = ddata->videomode;
 160 }
 161
 162 static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
 163                 struct omap_video_timings *timings)
 164 {
 165         struct panel_drv_data *ddata = to_panel_data(dssdev);
 166         struct omap_dss_device *in = ddata->in;
 167
 168         return in->ops.dpi->check_timings(in, timings);
 169 }
 170
 171 static struct omap_dss_driver sharp_ls_ops = {
 172         .connect        = sharp_ls_connect,
 173         .disconnect     = sharp_ls_disconnect,
 174
 175         .enable         = sharp_ls_enable,
 176         .disable        = sharp_ls_disable,
 177
 178         .set_timings    = sharp_ls_set_timings,
 179         .get_timings    = sharp_ls_get_timings,
 180         .check_timings  = sharp_ls_check_timings,
 181
 182         .get_resolution = omapdss_default_get_resolution,
 183 };
 184
 185 static int sharp_ls_probe_pdata(struct platform_device *pdev)
 186 {
 187         const struct panel_sharp_ls037v7dw01_platform_data *pdata;
 188         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 189         struct omap_dss_device *dssdev, *in;
 190
 191         pdata = dev_get_platdata(&pdev->dev);
 192
 193         in = omap_dss_find_output(pdata->source);
 194         if (in == NULL) {
 195                 dev_err(&pdev->dev, "failed to find video source '%s'\n",
 196                                 pdata->source);
 197                 return -EPROBE_DEFER;
 198         }
 199
 200         ddata->in = in;
 201
 202         ddata->data_lines = pdata->data_lines;
 203
 204         dssdev = &ddata->dssdev;
 205         dssdev->name = pdata->name;
 206
 207         ddata->resb_gpio = pdata->resb_gpio;
 208         ddata->ini_gpio = pdata->ini_gpio;
 209         ddata->mo_gpio = pdata->mo_gpio;
 210         ddata->lr_gpio = pdata->lr_gpio;
 211         ddata->ud_gpio = pdata->ud_gpio;
 212
 213         return 0;
 214 }
 215
 216 static int sharp_ls_probe(struct platform_device *pdev)
 217 {
 218         struct panel_drv_data *ddata;
 219         struct omap_dss_device *dssdev;
 220         int r;
 221
 222         ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 223         if (ddata == NULL)
 224                 return -ENOMEM;
 225
 226         platform_set_drvdata(pdev, ddata);
 227
 228         if (dev_get_platdata(&pdev->dev)) {
 229                 r = sharp_ls_probe_pdata(pdev);
 230                 if (r)
 231                         return r;
 232         } else {
 233                 return -ENODEV;
 234         }
 235
 236         if (gpio_is_valid(ddata->mo_gpio)) {
 237                 r = devm_gpio_request_one(&pdev->dev, ddata->mo_gpio,
 238                                 GPIOF_OUT_INIT_LOW, "lcd MO");
 239                 if (r)
 240                         goto err_gpio;
 241         }
 242
 243         if (gpio_is_valid(ddata->lr_gpio)) {
 244                 r = devm_gpio_request_one(&pdev->dev, ddata->lr_gpio,
 245                                 GPIOF_OUT_INIT_HIGH, "lcd LR");
 246                 if (r)
 247                         goto err_gpio;
 248         }
 249
 250         if (gpio_is_valid(ddata->ud_gpio)) {
 251                 r = devm_gpio_request_one(&pdev->dev, ddata->ud_gpio,
 252                                 GPIOF_OUT_INIT_HIGH, "lcd UD");
 253                 if (r)
 254                         goto err_gpio;
 255         }
 256
 257         if (gpio_is_valid(ddata->resb_gpio)) {
 258                 r = devm_gpio_request_one(&pdev->dev, ddata->resb_gpio,
 259                                 GPIOF_OUT_INIT_LOW, "lcd RESB");
 260                 if (r)
 261                         goto err_gpio;
 262         }
 263
 264         if (gpio_is_valid(ddata->ini_gpio)) {
 265                 r = devm_gpio_request_one(&pdev->dev, ddata->ini_gpio,
 266                                 GPIOF_OUT_INIT_LOW, "lcd INI");
 267                 if (r)
 268                         goto err_gpio;
 269         }
 270
 271         ddata->videomode = sharp_ls_timings;
 272
 273         dssdev = &ddata->dssdev;
 274         dssdev->dev = &pdev->dev;
 275         dssdev->driver = &sharp_ls_ops;
 276         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 277         dssdev->owner = THIS_MODULE;
 278         dssdev->panel.timings = ddata->videomode;
 279         dssdev->phy.dpi.data_lines = ddata->data_lines;
 280
 281         r = omapdss_register_display(dssdev);
 282         if (r) {
 283                 dev_err(&pdev->dev, "Failed to register panel\n");
 284                 goto err_reg;
 285         }
 286
 287         return 0;
 288
 289 err_reg:
 290 err_gpio:
 291         omap_dss_put_device(ddata->in);
 292         return r;
 293 }
 294
 295 static int __exit sharp_ls_remove(struct platform_device *pdev)
 296 {
 297         struct panel_drv_data *ddata = platform_get_drvdata(pdev);
 298         struct omap_dss_device *dssdev = &ddata->dssdev;
 299         struct omap_dss_device *in = ddata->in;
 300
 301         omapdss_unregister_display(dssdev);
 302
 303         sharp_ls_disable(dssdev);
 304         sharp_ls_disconnect(dssdev);
 305
 306         omap_dss_put_device(in);
 307
 308         return 0;
 309 }
 310
 311 static struct platform_driver sharp_ls_driver = {
 312         .probe = sharp_ls_probe,
 313         .remove = __exit_p(sharp_ls_remove),
 314         .driver = {
 315                 .name = "panel-sharp-ls037v7dw01",
 316                 .owner = THIS_MODULE,
 317         },
 318 };
 319
 320 module_platform_driver(sharp_ls_driver);
 321
 322 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
 323 MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
 324 MODULE_LICENSE("GPL");