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