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/delay.h>
  15 #include <linux/gpio/consumer.h>
  16 #include <linux/module.h>
  17 #include <linux/spi/spi.h>
  18
  19 #include "../dss/omapdss.h"
  20
  21 struct panel_drv_data {
  22         struct omap_dss_device  dssdev;
  23
  24         struct videomode vm;
  25
  26         struct gpio_desc *res_gpio;
  27
  28         struct spi_device *spi;
  29 };
  30
  31 #define LCD_XRES                800
  32 #define LCD_YRES                480
  33 /*
  34  * NEC PIX Clock Ratings
  35  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
  36  */
  37 #define LCD_PIXEL_CLOCK         23800000
  38
  39 static const struct {
  40         unsigned char addr;
  41         unsigned char dat;
  42 } nec_8048_init_seq[] = {
  43         { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
  44         { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
  45         { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
  46         { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
  47         { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
  48         { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
  49         { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
  50         { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
  51         { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
  52         { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
  53         { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
  54         { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
  55         { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
  56         { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
  57         { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
  58         { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
  59         { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
  60         { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
  61 };
  62
  63 static const struct videomode nec_8048_panel_vm = {
  64         .hactive        = LCD_XRES,
  65         .vactive        = LCD_YRES,
  66         .pixelclock     = LCD_PIXEL_CLOCK,
  67         .hfront_porch   = 6,
  68         .hsync_len      = 1,
  69         .hback_porch    = 4,
  70         .vfront_porch   = 3,
  71         .vsync_len      = 1,
  72         .vback_porch    = 4,
  73
  74         .flags          = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW,
  75 };
  76
  77 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
  78
  79 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
  80                         unsigned char reg_data)
  81 {
  82         int ret = 0;
  83         unsigned int cmd = 0, data = 0;
  84
  85         cmd = 0x0000 | reg_addr; /* register address write */
  86         data = 0x0100 | reg_data; /* register data write */
  87         data = (cmd << 16) | data;
  88
  89         ret = spi_write(spi, (unsigned char *)&data, 4);
  90         if (ret)
  91                 pr_err("error in spi_write %x\n", data);
  92
  93         return ret;
  94 }
  95
  96 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
  97 {
  98         unsigned int i;
  99         /* Initialization Sequence */
 100         /* nec_8048_spi_send(spi, REG, VAL) */
 101         for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
 102                 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 103                                 nec_8048_init_seq[i].dat);
 104         udelay(20);
 105         nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 106                                 nec_8048_init_seq[i].dat);
 107         return 0;
 108 }
 109
 110 static int nec_8048_connect(struct omap_dss_device *src,
 111                             struct omap_dss_device *dst)
 112 {
 113         return 0;
 114 }
 115
 116 static void nec_8048_disconnect(struct omap_dss_device *src,
 117                                 struct omap_dss_device *dst)
 118 {
 119 }
 120
 121 static int nec_8048_enable(struct omap_dss_device *dssdev)
 122 {
 123         struct panel_drv_data *ddata = to_panel_data(dssdev);
 124         struct omap_dss_device *src = dssdev->src;
 125         int r;
 126
 127         if (!omapdss_device_is_connected(dssdev))
 128                 return -ENODEV;
 129
 130         if (omapdss_device_is_enabled(dssdev))
 131                 return 0;
 132
 133         r = src->ops->enable(src);
 134         if (r)
 135                 return r;
 136
 137         gpiod_set_value_cansleep(ddata->res_gpio, 1);
 138
 139         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 140
 141         return 0;
 142 }
 143
 144 static void nec_8048_disable(struct omap_dss_device *dssdev)
 145 {
 146         struct panel_drv_data *ddata = to_panel_data(dssdev);
 147         struct omap_dss_device *src = dssdev->src;
 148
 149         if (!omapdss_device_is_enabled(dssdev))
 150                 return;
 151
 152         gpiod_set_value_cansleep(ddata->res_gpio, 0);
 153
 154         src->ops->disable(src);
 155
 156         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 157 }
 158
 159 static void nec_8048_get_timings(struct omap_dss_device *dssdev,
 160                                  struct videomode *vm)
 161 {
 162         struct panel_drv_data *ddata = to_panel_data(dssdev);
 163
 164         *vm = ddata->vm;
 165 }
 166
 167 static const struct omap_dss_device_ops nec_8048_ops = {
 168         .connect        = nec_8048_connect,
 169         .disconnect     = nec_8048_disconnect,
 170
 171         .enable         = nec_8048_enable,
 172         .disable        = nec_8048_disable,
 173
 174         .get_timings    = nec_8048_get_timings,
 175 };
 176
 177 static int nec_8048_probe(struct spi_device *spi)
 178 {
 179         struct panel_drv_data *ddata;
 180         struct omap_dss_device *dssdev;
 181         struct gpio_desc *gpio;
 182         int r;
 183
 184         dev_dbg(&spi->dev, "%s\n", __func__);
 185
 186         spi->mode = SPI_MODE_0;
 187         spi->bits_per_word = 32;
 188
 189         r = spi_setup(spi);
 190         if (r < 0) {
 191                 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
 192                 return r;
 193         }
 194
 195         init_nec_8048_wvga_lcd(spi);
 196
 197         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 198         if (ddata == NULL)
 199                 return -ENOMEM;
 200
 201         dev_set_drvdata(&spi->dev, ddata);
 202
 203         ddata->spi = spi;
 204
 205         gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
 206         if (IS_ERR(gpio)) {
 207                 dev_err(&spi->dev, "failed to get reset gpio\n");
 208                 return PTR_ERR(gpio);
 209         }
 210
 211         ddata->res_gpio = gpio;
 212
 213         ddata->vm = nec_8048_panel_vm;
 214
 215         dssdev = &ddata->dssdev;
 216         dssdev->dev = &spi->dev;
 217         dssdev->ops = &nec_8048_ops;
 218         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 219         dssdev->owner = THIS_MODULE;
 220         dssdev->of_ports = BIT(0);
 221         dssdev->bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_SYNC_POSEDGE
 222                           | DRM_BUS_FLAG_PIXDATA_POSEDGE;
 223
 224         omapdss_display_init(dssdev);
 225         omapdss_device_register(dssdev);
 226
 227         return 0;
 228 }
 229
 230 static int nec_8048_remove(struct spi_device *spi)
 231 {
 232         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 233         struct omap_dss_device *dssdev = &ddata->dssdev;
 234
 235         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 236
 237         omapdss_device_unregister(dssdev);
 238
 239         nec_8048_disable(dssdev);
 240
 241         return 0;
 242 }
 243
 244 #ifdef CONFIG_PM_SLEEP
 245 static int nec_8048_suspend(struct device *dev)
 246 {
 247         struct spi_device *spi = to_spi_device(dev);
 248
 249         nec_8048_spi_send(spi, 2, 0x01);
 250         mdelay(40);
 251
 252         return 0;
 253 }
 254
 255 static int nec_8048_resume(struct device *dev)
 256 {
 257         struct spi_device *spi = to_spi_device(dev);
 258
 259         /* reinitialize the panel */
 260         spi_setup(spi);
 261         nec_8048_spi_send(spi, 2, 0x00);
 262         init_nec_8048_wvga_lcd(spi);
 263
 264         return 0;
 265 }
 266 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
 267                 nec_8048_resume);
 268 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
 269 #else
 270 #define NEC_8048_PM_OPS NULL
 271 #endif
 272
 273 static const struct of_device_id nec_8048_of_match[] = {
 274         { .compatible = "omapdss,nec,nl8048hl11", },
 275         {},
 276 };
 277
 278 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
 279
 280 static struct spi_driver nec_8048_driver = {
 281         .driver = {
 282                 .name   = "panel-nec-nl8048hl11",
 283                 .pm     = NEC_8048_PM_OPS,
 284                 .of_match_table = nec_8048_of_match,
 285                 .suppress_bind_attrs = true,
 286         },
 287         .probe  = nec_8048_probe,
 288         .remove = nec_8048_remove,
 289 };
 290
 291 module_spi_driver(nec_8048_driver);
 292
 293 MODULE_ALIAS("spi:nec,nl8048hl11");
 294 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
 295 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
 296 MODULE_LICENSE("GPL");