drivers/gpu/drm/omapdrm/displays/panel-nec-nl8048hl11.c

   1 /*
   2  * NEC NL8048HL11 Panel driver
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   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 videomode vm;
  27
  28         int res_gpio;
  29         int qvga_gpio;
  30
  31         struct spi_device *spi;
  32 };
  33
  34 #define LCD_XRES                800
  35 #define LCD_YRES                480
  36 /*
  37  * NEC PIX Clock Ratings
  38  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
  39  */
  40 #define LCD_PIXEL_CLOCK         23800000
  41
  42 static const struct {
  43         unsigned char addr;
  44         unsigned char dat;
  45 } nec_8048_init_seq[] = {
  46         { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
  47         { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
  48         { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
  49         { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
  50         { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
  51         { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
  52         { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
  53         { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
  54         { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
  55         { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
  56         { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
  57         { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
  58         { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
  59         { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
  60         { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
  61         { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
  62         { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
  63         { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
  64 };
  65
  66 static const struct videomode nec_8048_panel_vm = {
  67         .hactive        = LCD_XRES,
  68         .vactive        = LCD_YRES,
  69         .pixelclock     = LCD_PIXEL_CLOCK,
  70         .hfront_porch   = 6,
  71         .hsync_len      = 1,
  72         .hback_porch    = 4,
  73         .vfront_porch   = 3,
  74         .vsync_len      = 1,
  75         .vback_porch    = 4,
  76
  77         .flags          = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
  78                           DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_POSEDGE |
  79                           DISPLAY_FLAGS_PIXDATA_POSEDGE,
  80 };
  81
  82 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
  83
  84 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
  85                         unsigned char reg_data)
  86 {
  87         int ret = 0;
  88         unsigned int cmd = 0, data = 0;
  89
  90         cmd = 0x0000 | reg_addr; /* register address write */
  91         data = 0x0100 | reg_data; /* register data write */
  92         data = (cmd << 16) | data;
  93
  94         ret = spi_write(spi, (unsigned char *)&data, 4);
  95         if (ret)
  96                 pr_err("error in spi_write %x\n", data);
  97
  98         return ret;
  99 }
 100
 101 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
 102 {
 103         unsigned int i;
 104         /* Initialization Sequence */
 105         /* nec_8048_spi_send(spi, REG, VAL) */
 106         for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
 107                 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 108                                 nec_8048_init_seq[i].dat);
 109         udelay(20);
 110         nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 111                                 nec_8048_init_seq[i].dat);
 112         return 0;
 113 }
 114
 115 static int nec_8048_connect(struct omap_dss_device *dssdev)
 116 {
 117         struct panel_drv_data *ddata = to_panel_data(dssdev);
 118         struct omap_dss_device *in = ddata->in;
 119         int r;
 120
 121         if (omapdss_device_is_connected(dssdev))
 122                 return 0;
 123
 124         r = in->ops.dpi->connect(in, dssdev);
 125         if (r)
 126                 return r;
 127
 128         return 0;
 129 }
 130
 131 static void nec_8048_disconnect(struct omap_dss_device *dssdev)
 132 {
 133         struct panel_drv_data *ddata = to_panel_data(dssdev);
 134         struct omap_dss_device *in = ddata->in;
 135
 136         if (!omapdss_device_is_connected(dssdev))
 137                 return;
 138
 139         in->ops.dpi->disconnect(in, dssdev);
 140 }
 141
 142 static int nec_8048_enable(struct omap_dss_device *dssdev)
 143 {
 144         struct panel_drv_data *ddata = to_panel_data(dssdev);
 145         struct omap_dss_device *in = ddata->in;
 146         int r;
 147
 148         if (!omapdss_device_is_connected(dssdev))
 149                 return -ENODEV;
 150
 151         if (omapdss_device_is_enabled(dssdev))
 152                 return 0;
 153
 154         in->ops.dpi->set_timings(in, &ddata->vm);
 155
 156         r = in->ops.dpi->enable(in);
 157         if (r)
 158                 return r;
 159
 160         if (gpio_is_valid(ddata->res_gpio))
 161                 gpio_set_value_cansleep(ddata->res_gpio, 1);
 162
 163         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 164
 165         return 0;
 166 }
 167
 168 static void nec_8048_disable(struct omap_dss_device *dssdev)
 169 {
 170         struct panel_drv_data *ddata = to_panel_data(dssdev);
 171         struct omap_dss_device *in = ddata->in;
 172
 173         if (!omapdss_device_is_enabled(dssdev))
 174                 return;
 175
 176         if (gpio_is_valid(ddata->res_gpio))
 177                 gpio_set_value_cansleep(ddata->res_gpio, 0);
 178
 179         in->ops.dpi->disable(in);
 180
 181         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 182 }
 183
 184 static void nec_8048_set_timings(struct omap_dss_device *dssdev,
 185                                  struct videomode *vm)
 186 {
 187         struct panel_drv_data *ddata = to_panel_data(dssdev);
 188         struct omap_dss_device *in = ddata->in;
 189
 190         ddata->vm = *vm;
 191         dssdev->panel.vm = *vm;
 192
 193         in->ops.dpi->set_timings(in, vm);
 194 }
 195
 196 static void nec_8048_get_timings(struct omap_dss_device *dssdev,
 197                                  struct videomode *vm)
 198 {
 199         struct panel_drv_data *ddata = to_panel_data(dssdev);
 200
 201         *vm = ddata->vm;
 202 }
 203
 204 static int nec_8048_check_timings(struct omap_dss_device *dssdev,
 205                                   struct videomode *vm)
 206 {
 207         struct panel_drv_data *ddata = to_panel_data(dssdev);
 208         struct omap_dss_device *in = ddata->in;
 209
 210         return in->ops.dpi->check_timings(in, vm);
 211 }
 212
 213 static struct omap_dss_driver nec_8048_ops = {
 214         .connect        = nec_8048_connect,
 215         .disconnect     = nec_8048_disconnect,
 216
 217         .enable         = nec_8048_enable,
 218         .disable        = nec_8048_disable,
 219
 220         .set_timings    = nec_8048_set_timings,
 221         .get_timings    = nec_8048_get_timings,
 222         .check_timings  = nec_8048_check_timings,
 223 };
 224
 225 static int nec_8048_probe_of(struct spi_device *spi)
 226 {
 227         struct device_node *node = spi->dev.of_node;
 228         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 229         struct omap_dss_device *in;
 230         int gpio;
 231
 232         gpio = of_get_named_gpio(node, "reset-gpios", 0);
 233         if (!gpio_is_valid(gpio)) {
 234                 dev_err(&spi->dev, "failed to parse enable gpio\n");
 235                 return gpio;
 236         }
 237         ddata->res_gpio = gpio;
 238
 239         /* XXX the panel spec doesn't mention any QVGA pin?? */
 240         ddata->qvga_gpio = -ENOENT;
 241
 242         in = omapdss_of_find_source_for_first_ep(node);
 243         if (IS_ERR(in)) {
 244                 dev_err(&spi->dev, "failed to find video source\n");
 245                 return PTR_ERR(in);
 246         }
 247
 248         ddata->in = in;
 249
 250         return 0;
 251 }
 252
 253 static int nec_8048_probe(struct spi_device *spi)
 254 {
 255         struct panel_drv_data *ddata;
 256         struct omap_dss_device *dssdev;
 257         int r;
 258
 259         dev_dbg(&spi->dev, "%s\n", __func__);
 260
 261         spi->mode = SPI_MODE_0;
 262         spi->bits_per_word = 32;
 263
 264         r = spi_setup(spi);
 265         if (r < 0) {
 266                 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
 267                 return r;
 268         }
 269
 270         init_nec_8048_wvga_lcd(spi);
 271
 272         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 273         if (ddata == NULL)
 274                 return -ENOMEM;
 275
 276         dev_set_drvdata(&spi->dev, ddata);
 277
 278         ddata->spi = spi;
 279
 280         if (!spi->dev.of_node)
 281                 return -ENODEV;
 282
 283         r = nec_8048_probe_of(spi);
 284         if (r)
 285                 return r;
 286
 287         if (gpio_is_valid(ddata->qvga_gpio)) {
 288                 r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio,
 289                                 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
 290                 if (r)
 291                         goto err_gpio;
 292         }
 293
 294         if (gpio_is_valid(ddata->res_gpio)) {
 295                 r = devm_gpio_request_one(&spi->dev, ddata->res_gpio,
 296                                 GPIOF_OUT_INIT_LOW, "lcd RES");
 297                 if (r)
 298                         goto err_gpio;
 299         }
 300
 301         ddata->vm = nec_8048_panel_vm;
 302
 303         dssdev = &ddata->dssdev;
 304         dssdev->dev = &spi->dev;
 305         dssdev->driver = &nec_8048_ops;
 306         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 307         dssdev->owner = THIS_MODULE;
 308         dssdev->panel.vm = ddata->vm;
 309
 310         r = omapdss_register_display(dssdev);
 311         if (r) {
 312                 dev_err(&spi->dev, "Failed to register panel\n");
 313                 goto err_reg;
 314         }
 315
 316         return 0;
 317
 318 err_reg:
 319 err_gpio:
 320         omap_dss_put_device(ddata->in);
 321         return r;
 322 }
 323
 324 static int nec_8048_remove(struct spi_device *spi)
 325 {
 326         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 327         struct omap_dss_device *dssdev = &ddata->dssdev;
 328         struct omap_dss_device *in = ddata->in;
 329
 330         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 331
 332         omapdss_unregister_display(dssdev);
 333
 334         nec_8048_disable(dssdev);
 335         nec_8048_disconnect(dssdev);
 336
 337         omap_dss_put_device(in);
 338
 339         return 0;
 340 }
 341
 342 #ifdef CONFIG_PM_SLEEP
 343 static int nec_8048_suspend(struct device *dev)
 344 {
 345         struct spi_device *spi = to_spi_device(dev);
 346
 347         nec_8048_spi_send(spi, 2, 0x01);
 348         mdelay(40);
 349
 350         return 0;
 351 }
 352
 353 static int nec_8048_resume(struct device *dev)
 354 {
 355         struct spi_device *spi = to_spi_device(dev);
 356
 357         /* reinitialize the panel */
 358         spi_setup(spi);
 359         nec_8048_spi_send(spi, 2, 0x00);
 360         init_nec_8048_wvga_lcd(spi);
 361
 362         return 0;
 363 }
 364 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
 365                 nec_8048_resume);
 366 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
 367 #else
 368 #define NEC_8048_PM_OPS NULL
 369 #endif
 370
 371 static const struct of_device_id nec_8048_of_match[] = {
 372         { .compatible = "omapdss,nec,nl8048hl11", },
 373         {},
 374 };
 375
 376 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
 377
 378 static struct spi_driver nec_8048_driver = {
 379         .driver = {
 380                 .name   = "panel-nec-nl8048hl11",
 381                 .pm     = NEC_8048_PM_OPS,
 382                 .of_match_table = nec_8048_of_match,
 383                 .suppress_bind_attrs = true,
 384         },
 385         .probe  = nec_8048_probe,
 386         .remove = nec_8048_remove,
 387 };
 388
 389 module_spi_driver(nec_8048_driver);
 390
 391 MODULE_ALIAS("spi:nec,nl8048hl11");
 392 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
 393 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
 394 MODULE_LICENSE("GPL");