linux/drivers/video/omap2/displays-new/panel-nec-nl8048hl11.c
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   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
  20#include <video/omapdss.h>
  21#include <video/omap-panel-data.h>
  22
  23struct 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         23800
  44
  45static 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
  69static const struct omap_video_timings nec_8048_panel_timings = {
  70        .x_res          = LCD_XRES,
  71        .y_res          = LCD_YRES,
  72        .pixel_clock    = 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
  89static 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
 106static 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
 120static 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
 136static 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
 147static 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        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
 174static 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
 190static 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
 202static 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
 210static 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
 219static 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
 234static int nec_8048_probe_pdata(struct spi_device *spi)
 235{
 236        const struct panel_nec_nl8048hl11_platform_data *pdata;
 237        struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 238        struct omap_dss_device *dssdev, *in;
 239
 240        pdata = dev_get_platdata(&spi->dev);
 241
 242        ddata->qvga_gpio = pdata->qvga_gpio;
 243        ddata->res_gpio = pdata->res_gpio;
 244
 245        in = omap_dss_find_output(pdata->source);
 246        if (in == NULL) {
 247                dev_err(&spi->dev, "failed to find video source '%s'\n",
 248                                pdata->source);
 249                return -EPROBE_DEFER;
 250        }
 251        ddata->in = in;
 252
 253        ddata->data_lines = pdata->data_lines;
 254
 255        dssdev = &ddata->dssdev;
 256        dssdev->name = pdata->name;
 257
 258        return 0;
 259}
 260
 261static 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 (dev_get_platdata(&spi->dev)) {
 289                r = nec_8048_probe_pdata(spi);
 290                if (r)
 291                        return r;
 292        } else {
 293                return -ENODEV;
 294        }
 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
 327err_reg:
 328err_gpio:
 329        omap_dss_put_device(ddata->in);
 330        return r;
 331}
 332
 333static 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
 352static 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
 362static 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}
 373static 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
 380static struct spi_driver nec_8048_driver = {
 381        .driver = {
 382                .name   = "panel-nec-nl8048hl11",
 383                .owner  = THIS_MODULE,
 384                .pm     = NEC_8048_PM_OPS,
 385        },
 386        .probe  = nec_8048_probe,
 387        .remove = nec_8048_remove,
 388};
 389
 390module_spi_driver(nec_8048_driver);
 391
 392MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
 393MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
 394MODULE_LICENSE("GPL");
 395