drivers/video/fbdev/omap2/omapfb/displays/panel-nec-nl8048hl11.c

   1 /*
   2  * NEC NL8048HL11 Panel driver
   3  *
   4  * Copyright (C) 2010 Texas Instruments Inc.
   5  * Author: Erik Gilling <konkers@android.com>
   6  * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
   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 as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/delay.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/fb.h>
  18 #include <linux/gpio.h>
  19 #include <linux/of_gpio.h>
  20
  21 #include <video/omapdss.h>
  22 #include <video/omap-panel-data.h>
  23
  24 struct panel_drv_data {
  25         struct omap_dss_device  dssdev;
  26         struct omap_dss_device *in;
  27
  28         struct omap_video_timings videomode;
  29
  30         int data_lines;
  31
  32         int res_gpio;
  33         int qvga_gpio;
  34
  35         struct spi_device *spi;
  36 };
  37
  38 #define LCD_XRES                800
  39 #define LCD_YRES                480
  40 /*
  41  * NEC PIX Clock Ratings
  42  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
  43  */
  44 #define LCD_PIXEL_CLOCK         23800000
  45
  46 static const struct {
  47         unsigned char addr;
  48         unsigned char dat;
  49 } nec_8048_init_seq[] = {
  50         { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
  51         { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
  52         { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
  53         { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
  54         { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
  55         { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
  56         { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
  57         { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
  58         { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
  59         { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
  60         { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
  61         { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
  62         { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
  63         { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
  64         { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
  65         { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
  66         { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
  67         { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
  68 };
  69
  70 static const struct omap_video_timings nec_8048_panel_timings = {
  71         .x_res          = LCD_XRES,
  72         .y_res          = LCD_YRES,
  73         .pixelclock     = LCD_PIXEL_CLOCK,
  74         .hfp            = 6,
  75         .hsw            = 1,
  76         .hbp            = 4,
  77         .vfp            = 3,
  78         .vsw            = 1,
  79         .vbp            = 4,
  80
  81         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  82         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  83         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  84         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  85         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  86 };
  87
  88 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
  89
  90 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
  91                         unsigned char reg_data)
  92 {
  93         int ret = 0;
  94         unsigned int cmd = 0, data = 0;
  95
  96         cmd = 0x0000 | reg_addr; /* register address write */
  97         data = 0x0100 | reg_data; /* register data write */
  98         data = (cmd << 16) | data;
  99
 100         ret = spi_write(spi, (unsigned char *)&data, 4);
 101         if (ret)
 102                 pr_err("error in spi_write %x\n", data);
 103
 104         return ret;
 105 }
 106
 107 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
 108 {
 109         unsigned int i;
 110         /* Initialization Sequence */
 111         /* nec_8048_spi_send(spi, REG, VAL) */
 112         for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
 113                 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 114                                 nec_8048_init_seq[i].dat);
 115         udelay(20);
 116         nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 117                                 nec_8048_init_seq[i].dat);
 118         return 0;
 119 }
 120
 121 static int nec_8048_connect(struct omap_dss_device *dssdev)
 122 {
 123         struct panel_drv_data *ddata = to_panel_data(dssdev);
 124         struct omap_dss_device *in = ddata->in;
 125         int r;
 126
 127         if (omapdss_device_is_connected(dssdev))
 128                 return 0;
 129
 130         r = in->ops.dpi->connect(in, dssdev);
 131         if (r)
 132                 return r;
 133
 134         return 0;
 135 }
 136
 137 static void nec_8048_disconnect(struct omap_dss_device *dssdev)
 138 {
 139         struct panel_drv_data *ddata = to_panel_data(dssdev);
 140         struct omap_dss_device *in = ddata->in;
 141
 142         if (!omapdss_device_is_connected(dssdev))
 143                 return;
 144
 145         in->ops.dpi->disconnect(in, dssdev);
 146 }
 147
 148 static int nec_8048_enable(struct omap_dss_device *dssdev)
 149 {
 150         struct panel_drv_data *ddata = to_panel_data(dssdev);
 151         struct omap_dss_device *in = ddata->in;
 152         int r;
 153
 154         if (!omapdss_device_is_connected(dssdev))
 155                 return -ENODEV;
 156
 157         if (omapdss_device_is_enabled(dssdev))
 158                 return 0;
 159
 160         if (ddata->data_lines)
 161                 in->ops.dpi->set_data_lines(in, ddata->data_lines);
 162         in->ops.dpi->set_timings(in, &ddata->videomode);
 163
 164         r = in->ops.dpi->enable(in);
 165         if (r)
 166                 return r;
 167
 168         if (gpio_is_valid(ddata->res_gpio))
 169                 gpio_set_value_cansleep(ddata->res_gpio, 1);
 170
 171         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 172
 173         return 0;
 174 }
 175
 176 static void nec_8048_disable(struct omap_dss_device *dssdev)
 177 {
 178         struct panel_drv_data *ddata = to_panel_data(dssdev);
 179         struct omap_dss_device *in = ddata->in;
 180
 181         if (!omapdss_device_is_enabled(dssdev))
 182                 return;
 183
 184         if (gpio_is_valid(ddata->res_gpio))
 185                 gpio_set_value_cansleep(ddata->res_gpio, 0);
 186
 187         in->ops.dpi->disable(in);
 188
 189         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 190 }
 191
 192 static void nec_8048_set_timings(struct omap_dss_device *dssdev,
 193                 struct omap_video_timings *timings)
 194 {
 195         struct panel_drv_data *ddata = to_panel_data(dssdev);
 196         struct omap_dss_device *in = ddata->in;
 197
 198         ddata->videomode = *timings;
 199         dssdev->panel.timings = *timings;
 200
 201         in->ops.dpi->set_timings(in, timings);
 202 }
 203
 204 static void nec_8048_get_timings(struct omap_dss_device *dssdev,
 205                 struct omap_video_timings *timings)
 206 {
 207         struct panel_drv_data *ddata = to_panel_data(dssdev);
 208
 209         *timings = ddata->videomode;
 210 }
 211
 212 static int nec_8048_check_timings(struct omap_dss_device *dssdev,
 213                 struct omap_video_timings *timings)
 214 {
 215         struct panel_drv_data *ddata = to_panel_data(dssdev);
 216         struct omap_dss_device *in = ddata->in;
 217
 218         return in->ops.dpi->check_timings(in, timings);
 219 }
 220
 221 static struct omap_dss_driver nec_8048_ops = {
 222         .connect        = nec_8048_connect,
 223         .disconnect     = nec_8048_disconnect,
 224
 225         .enable         = nec_8048_enable,
 226         .disable        = nec_8048_disable,
 227
 228         .set_timings    = nec_8048_set_timings,
 229         .get_timings    = nec_8048_get_timings,
 230         .check_timings  = nec_8048_check_timings,
 231
 232         .get_resolution = omapdss_default_get_resolution,
 233 };
 234
 235
 236 static int nec_8048_probe_pdata(struct spi_device *spi)
 237 {
 238         const struct panel_nec_nl8048hl11_platform_data *pdata;
 239         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 240         struct omap_dss_device *dssdev, *in;
 241
 242         pdata = dev_get_platdata(&spi->dev);
 243
 244         ddata->qvga_gpio = pdata->qvga_gpio;
 245         ddata->res_gpio = pdata->res_gpio;
 246
 247         in = omap_dss_find_output(pdata->source);
 248         if (in == NULL) {
 249                 dev_err(&spi->dev, "failed to find video source '%s'\n",
 250                                 pdata->source);
 251                 return -EPROBE_DEFER;
 252         }
 253         ddata->in = in;
 254
 255         ddata->data_lines = pdata->data_lines;
 256
 257         dssdev = &ddata->dssdev;
 258         dssdev->name = pdata->name;
 259
 260         return 0;
 261 }
 262
 263 static int nec_8048_probe_of(struct spi_device *spi)
 264 {
 265         struct device_node *node = spi->dev.of_node;
 266         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 267         struct omap_dss_device *in;
 268         int gpio;
 269
 270         gpio = of_get_named_gpio(node, "reset-gpios", 0);
 271         if (!gpio_is_valid(gpio)) {
 272                 dev_err(&spi->dev, "failed to parse enable gpio\n");
 273                 return gpio;
 274         }
 275         ddata->res_gpio = gpio;
 276
 277         /* XXX the panel spec doesn't mention any QVGA pin?? */
 278         ddata->qvga_gpio = -ENOENT;
 279
 280         in = omapdss_of_find_source_for_first_ep(node);
 281         if (IS_ERR(in)) {
 282                 dev_err(&spi->dev, "failed to find video source\n");
 283                 return PTR_ERR(in);
 284         }
 285
 286         ddata->in = in;
 287
 288         return 0;
 289 }
 290
 291 static int nec_8048_probe(struct spi_device *spi)
 292 {
 293         struct panel_drv_data *ddata;
 294         struct omap_dss_device *dssdev;
 295         int r;
 296
 297         dev_dbg(&spi->dev, "%s\n", __func__);
 298
 299         spi->mode = SPI_MODE_0;
 300         spi->bits_per_word = 32;
 301
 302         r = spi_setup(spi);
 303         if (r < 0) {
 304                 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
 305                 return r;
 306         }
 307
 308         init_nec_8048_wvga_lcd(spi);
 309
 310         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 311         if (ddata == NULL)
 312                 return -ENOMEM;
 313
 314         dev_set_drvdata(&spi->dev, ddata);
 315
 316         ddata->spi = spi;
 317
 318         if (dev_get_platdata(&spi->dev)) {
 319                 r = nec_8048_probe_pdata(spi);
 320                 if (r)
 321                         return r;
 322         } else if (spi->dev.of_node) {
 323                 r = nec_8048_probe_of(spi);
 324                 if (r)
 325                         return r;
 326         } else {
 327                 return -ENODEV;
 328         }
 329
 330         if (gpio_is_valid(ddata->qvga_gpio)) {
 331                 r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio,
 332                                 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
 333                 if (r)
 334                         goto err_gpio;
 335         }
 336
 337         if (gpio_is_valid(ddata->res_gpio)) {
 338                 r = devm_gpio_request_one(&spi->dev, ddata->res_gpio,
 339                                 GPIOF_OUT_INIT_LOW, "lcd RES");
 340                 if (r)
 341                         goto err_gpio;
 342         }
 343
 344         ddata->videomode = nec_8048_panel_timings;
 345
 346         dssdev = &ddata->dssdev;
 347         dssdev->dev = &spi->dev;
 348         dssdev->driver = &nec_8048_ops;
 349         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 350         dssdev->owner = THIS_MODULE;
 351         dssdev->panel.timings = ddata->videomode;
 352
 353         r = omapdss_register_display(dssdev);
 354         if (r) {
 355                 dev_err(&spi->dev, "Failed to register panel\n");
 356                 goto err_reg;
 357         }
 358
 359         return 0;
 360
 361 err_reg:
 362 err_gpio:
 363         omap_dss_put_device(ddata->in);
 364         return r;
 365 }
 366
 367 static int nec_8048_remove(struct spi_device *spi)
 368 {
 369         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 370         struct omap_dss_device *dssdev = &ddata->dssdev;
 371         struct omap_dss_device *in = ddata->in;
 372
 373         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 374
 375         omapdss_unregister_display(dssdev);
 376
 377         nec_8048_disable(dssdev);
 378         nec_8048_disconnect(dssdev);
 379
 380         omap_dss_put_device(in);
 381
 382         return 0;
 383 }
 384
 385 #ifdef CONFIG_PM_SLEEP
 386 static int nec_8048_suspend(struct device *dev)
 387 {
 388         struct spi_device *spi = to_spi_device(dev);
 389
 390         nec_8048_spi_send(spi, 2, 0x01);
 391         mdelay(40);
 392
 393         return 0;
 394 }
 395
 396 static int nec_8048_resume(struct device *dev)
 397 {
 398         struct spi_device *spi = to_spi_device(dev);
 399
 400         /* reinitialize the panel */
 401         spi_setup(spi);
 402         nec_8048_spi_send(spi, 2, 0x00);
 403         init_nec_8048_wvga_lcd(spi);
 404
 405         return 0;
 406 }
 407 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
 408                 nec_8048_resume);
 409 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
 410 #else
 411 #define NEC_8048_PM_OPS NULL
 412 #endif
 413
 414 static const struct of_device_id nec_8048_of_match[] = {
 415         { .compatible = "omapdss,nec,nl8048hl11", },
 416         {},
 417 };
 418
 419 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
 420
 421 static struct spi_driver nec_8048_driver = {
 422         .driver = {
 423                 .name   = "panel-nec-nl8048hl11",
 424                 .pm     = NEC_8048_PM_OPS,
 425                 .of_match_table = nec_8048_of_match,
 426                 .suppress_bind_attrs = true,
 427         },
 428         .probe  = nec_8048_probe,
 429         .remove = nec_8048_remove,
 430 };
 431
 432 module_spi_driver(nec_8048_driver);
 433
 434 MODULE_ALIAS("spi:nec,nl8048hl11");
 435 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
 436 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
 437 MODULE_LICENSE("GPL");