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