drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c

   1 /*
   2  * Support for NEC-nl8048hl11-01b panel driver
   3  *
   4  * Copyright (C) 2010 Texas Instruments Inc.
   5  * Author: Erik Gilling <konkers@android.com>
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/delay.h>
  21 #include <linux/spi/spi.h>
  22 #include <linux/fb.h>
  23 #include <linux/gpio.h>
  24
  25 #include <video/omapdss.h>
  26 #include <video/omap-panel-data.h>
  27
  28 #define LCD_XRES                800
  29 #define LCD_YRES                480
  30 /*
  31  * NEC PIX Clock Ratings
  32  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
  33  */
  34 #define LCD_PIXEL_CLOCK         23800
  35
  36 static const struct {
  37         unsigned char addr;
  38         unsigned char dat;
  39 } nec_8048_init_seq[] = {
  40         { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
  41         { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
  42         { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
  43         { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
  44         { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
  45         { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
  46         { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
  47         { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
  48         { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
  49         { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
  50         { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
  51         { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
  52         { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
  53         { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
  54         { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
  55         { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
  56         { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
  57         { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
  58 };
  59
  60 /*
  61  * NEC NL8048HL11-01B  Manual
  62  * defines HFB, HSW, HBP, VFP, VSW, VBP as shown below
  63  */
  64
  65 static struct omap_video_timings nec_8048_panel_timings = {
  66         /* 800 x 480 @ 60 Hz  Reduced blanking VESA CVT 0.31M3-R */
  67         .x_res          = LCD_XRES,
  68         .y_res          = LCD_YRES,
  69         .pixel_clock    = LCD_PIXEL_CLOCK,
  70         .hfp            = 6,
  71         .hsw            = 1,
  72         .hbp            = 4,
  73         .vfp            = 3,
  74         .vsw            = 1,
  75         .vbp            = 4,
  76
  77         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  78         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  79         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  80         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  81         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  82 };
  83
  84 static inline struct panel_nec_nl8048_data
  85 *get_panel_data(const struct omap_dss_device *dssdev)
  86 {
  87         return (struct panel_nec_nl8048_data *) dssdev->data;
  88 }
  89
  90 static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
  91 {
  92         struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
  93         int r;
  94
  95         if (!pd)
  96                 return -EINVAL;
  97
  98         dssdev->panel.timings = nec_8048_panel_timings;
  99
 100         if (gpio_is_valid(pd->qvga_gpio)) {
 101                 r = devm_gpio_request_one(&dssdev->dev, pd->qvga_gpio,
 102                                 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
 103                 if (r)
 104                         return r;
 105         }
 106
 107         if (gpio_is_valid(pd->res_gpio)) {
 108                 r = devm_gpio_request_one(&dssdev->dev, pd->res_gpio,
 109                                 GPIOF_OUT_INIT_LOW, "lcd RES");
 110                 if (r)
 111                         return r;
 112         }
 113
 114         return 0;
 115 }
 116
 117 static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
 118 {
 119 }
 120
 121 static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
 122 {
 123         struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
 124         int r;
 125
 126         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 127                 return 0;
 128
 129         omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
 130         omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
 131
 132         r = omapdss_dpi_display_enable(dssdev);
 133         if (r)
 134                 goto err0;
 135
 136         if (gpio_is_valid(pd->res_gpio))
 137                 gpio_set_value_cansleep(pd->res_gpio, 1);
 138
 139         return 0;
 140
 141 err0:
 142         return r;
 143 }
 144
 145 static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
 146 {
 147         struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
 148
 149         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
 150                 return;
 151
 152         if (gpio_is_valid(pd->res_gpio))
 153                 gpio_set_value_cansleep(pd->res_gpio, 0);
 154
 155         omapdss_dpi_display_disable(dssdev);
 156 }
 157
 158 static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
 159 {
 160         int r;
 161
 162         r = nec_8048_panel_power_on(dssdev);
 163         if (r)
 164                 return r;
 165
 166         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 167
 168         return 0;
 169 }
 170
 171 static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
 172 {
 173         nec_8048_panel_power_off(dssdev);
 174
 175         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 176 }
 177
 178 static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
 179 {
 180         return 16;
 181 }
 182
 183 static struct omap_dss_driver nec_8048_driver = {
 184         .probe                  = nec_8048_panel_probe,
 185         .remove                 = nec_8048_panel_remove,
 186         .enable                 = nec_8048_panel_enable,
 187         .disable                = nec_8048_panel_disable,
 188         .get_recommended_bpp    = nec_8048_recommended_bpp,
 189
 190         .driver         = {
 191                 .name           = "NEC_8048_panel",
 192                 .owner          = THIS_MODULE,
 193         },
 194 };
 195
 196 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
 197                         unsigned char reg_data)
 198 {
 199         int ret = 0;
 200         unsigned int cmd = 0, data = 0;
 201
 202         cmd = 0x0000 | reg_addr; /* register address write */
 203         data = 0x0100 | reg_data ; /* register data write */
 204         data = (cmd << 16) | data;
 205
 206         ret = spi_write(spi, (unsigned char *)&data, 4);
 207         if (ret)
 208                 pr_err("error in spi_write %x\n", data);
 209
 210         return ret;
 211 }
 212
 213 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
 214 {
 215         unsigned int i;
 216         /* Initialization Sequence */
 217         /* nec_8048_spi_send(spi, REG, VAL) */
 218         for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
 219                 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 220                                 nec_8048_init_seq[i].dat);
 221         udelay(20);
 222         nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
 223                                 nec_8048_init_seq[i].dat);
 224         return 0;
 225 }
 226
 227 static int nec_8048_spi_probe(struct spi_device *spi)
 228 {
 229         spi->mode = SPI_MODE_0;
 230         spi->bits_per_word = 32;
 231         spi_setup(spi);
 232
 233         init_nec_8048_wvga_lcd(spi);
 234
 235         return omap_dss_register_driver(&nec_8048_driver);
 236 }
 237
 238 static int nec_8048_spi_remove(struct spi_device *spi)
 239 {
 240         omap_dss_unregister_driver(&nec_8048_driver);
 241
 242         return 0;
 243 }
 244
 245 #ifdef CONFIG_PM_SLEEP
 246
 247 static int nec_8048_spi_suspend(struct device *dev)
 248 {
 249         struct spi_device *spi = to_spi_device(dev);
 250
 251         nec_8048_spi_send(spi, 2, 0x01);
 252         mdelay(40);
 253
 254         return 0;
 255 }
 256
 257 static int nec_8048_spi_resume(struct device *dev)
 258 {
 259         struct spi_device *spi = to_spi_device(dev);
 260
 261         /* reinitialize the panel */
 262         spi_setup(spi);
 263         nec_8048_spi_send(spi, 2, 0x00);
 264         init_nec_8048_wvga_lcd(spi);
 265
 266         return 0;
 267 }
 268
 269 static SIMPLE_DEV_PM_OPS(nec_8048_spi_pm_ops, nec_8048_spi_suspend,
 270                 nec_8048_spi_resume);
 271 #define NEC_8048_SPI_PM_OPS (&nec_8048_spi_pm_ops)
 272 #else
 273 #define NEC_8048_SPI_PM_OPS NULL
 274 #endif
 275
 276 static struct spi_driver nec_8048_spi_driver = {
 277         .probe          = nec_8048_spi_probe,
 278         .remove         = nec_8048_spi_remove,
 279         .driver         = {
 280                 .name   = "nec_8048_spi",
 281                 .owner  = THIS_MODULE,
 282                 .pm     = NEC_8048_SPI_PM_OPS,
 283         },
 284 };
 285
 286 module_spi_driver(nec_8048_spi_driver);
 287
 288 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
 289 MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
 290 MODULE_LICENSE("GPL");