drivers/video/fbdev/omap2/omapfb/displays/panel-nec-nl8048hl11.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * NEC NL8048HL11 Panel driver
   4  *
   5  * Copyright (C) 2010 Texas Instruments Inc.
   6  * Author: Erik Gilling <konkers@android.com>
   7  * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
   8  */
   9
  10 #include <linux/delay.h>
  11 #include <linux/err.h>
  12 #include <linux/fb.h>
  13 #include <linux/gpio/consumer.h>
  14 #include <linux/module.h>
  15 #include <linux/spi/spi.h>
  16
  17 #include <video/omapfb_dss.h>
  18
  19 struct panel_drv_data {
  20         struct omap_dss_device  dssdev;
  21         struct omap_dss_device *in;
  22
  23         struct omap_video_timings videomode;
  24
  25         int data_lines;
  26
  27         struct gpio_desc *res_gpio;
  28
  29         struct spi_device *spi;
  30 };
  31
  32 #define LCD_XRES                800
  33 #define LCD_YRES                480
  34 /*
  35  * NEC PIX Clock Ratings
  36  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
  37  */
  38 #define LCD_PIXEL_CLOCK         23800000
  39
  40 static const struct {
  41         unsigned char addr;
  42         unsigned char dat;
  43 } nec_8048_init_seq[] = {
  44         { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
  45         { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
  46         { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
  47         { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
  48         { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
  49         { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
  50         { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
  51         { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
  52         { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
  53         { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
  54         { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
  55         { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
  56         { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
  57         { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
  58         { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
  59         { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
  60         { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
  61         { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
  62 };
  63
  64 static const struct omap_video_timings nec_8048_panel_timings = {
  65         .x_res          = LCD_XRES,
  66         .y_res          = LCD_YRES,
  67         .pixelclock     = LCD_PIXEL_CLOCK,
  68         .hfp            = 6,
  69         .hsw            = 1,
  70         .hbp            = 4,
  71         .vfp            = 3,
  72         .vsw            = 1,
  73         .vbp            = 4,
  74
  75         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  76         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  77         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  78         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  79         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  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
 120         if (omapdss_device_is_connected(dssdev))
 121                 return 0;
 122
 123         return in->ops.dpi->connect(in, dssdev);
 124 }
 125
 126 static void nec_8048_disconnect(struct omap_dss_device *dssdev)
 127 {
 128         struct panel_drv_data *ddata = to_panel_data(dssdev);
 129         struct omap_dss_device *in = ddata->in;
 130
 131         if (!omapdss_device_is_connected(dssdev))
 132                 return;
 133
 134         in->ops.dpi->disconnect(in, dssdev);
 135 }
 136
 137 static int nec_8048_enable(struct omap_dss_device *dssdev)
 138 {
 139         struct panel_drv_data *ddata = to_panel_data(dssdev);
 140         struct omap_dss_device *in = ddata->in;
 141         int r;
 142
 143         if (!omapdss_device_is_connected(dssdev))
 144                 return -ENODEV;
 145
 146         if (omapdss_device_is_enabled(dssdev))
 147                 return 0;
 148
 149         if (ddata->data_lines)
 150                 in->ops.dpi->set_data_lines(in, ddata->data_lines);
 151         in->ops.dpi->set_timings(in, &ddata->videomode);
 152
 153         r = in->ops.dpi->enable(in);
 154         if (r)
 155                 return r;
 156
 157         /* Apparently existing DTSes use incorrect polarity (active high) */
 158         gpiod_set_value_cansleep(ddata->res_gpio, 1);
 159
 160         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 161
 162         return 0;
 163 }
 164
 165 static void nec_8048_disable(struct omap_dss_device *dssdev)
 166 {
 167         struct panel_drv_data *ddata = to_panel_data(dssdev);
 168         struct omap_dss_device *in = ddata->in;
 169
 170         if (!omapdss_device_is_enabled(dssdev))
 171                 return;
 172
 173         /* Apparently existing DTSes use incorrect polarity (active high) */
 174         gpiod_set_value_cansleep(ddata->res_gpio, 0);
 175
 176         in->ops.dpi->disable(in);
 177
 178         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 179 }
 180
 181 static void nec_8048_set_timings(struct omap_dss_device *dssdev,
 182                 struct omap_video_timings *timings)
 183 {
 184         struct panel_drv_data *ddata = to_panel_data(dssdev);
 185         struct omap_dss_device *in = ddata->in;
 186
 187         ddata->videomode = *timings;
 188         dssdev->panel.timings = *timings;
 189
 190         in->ops.dpi->set_timings(in, timings);
 191 }
 192
 193 static void nec_8048_get_timings(struct omap_dss_device *dssdev,
 194                 struct omap_video_timings *timings)
 195 {
 196         struct panel_drv_data *ddata = to_panel_data(dssdev);
 197
 198         *timings = ddata->videomode;
 199 }
 200
 201 static int nec_8048_check_timings(struct omap_dss_device *dssdev,
 202                 struct omap_video_timings *timings)
 203 {
 204         struct panel_drv_data *ddata = to_panel_data(dssdev);
 205         struct omap_dss_device *in = ddata->in;
 206
 207         return in->ops.dpi->check_timings(in, timings);
 208 }
 209
 210 static struct omap_dss_driver nec_8048_ops = {
 211         .connect        = nec_8048_connect,
 212         .disconnect     = nec_8048_disconnect,
 213
 214         .enable         = nec_8048_enable,
 215         .disable        = nec_8048_disable,
 216
 217         .set_timings    = nec_8048_set_timings,
 218         .get_timings    = nec_8048_get_timings,
 219         .check_timings  = nec_8048_check_timings,
 220
 221         .get_resolution = omapdss_default_get_resolution,
 222 };
 223
 224 static int nec_8048_probe(struct spi_device *spi)
 225 {
 226         struct panel_drv_data *ddata;
 227         struct omap_dss_device *dssdev;
 228         int r;
 229
 230         dev_dbg(&spi->dev, "%s\n", __func__);
 231
 232         if (!spi->dev.of_node)
 233                 return -ENODEV;
 234
 235         spi->mode = SPI_MODE_0;
 236         spi->bits_per_word = 32;
 237
 238         r = spi_setup(spi);
 239         if (r < 0) {
 240                 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
 241                 return r;
 242         }
 243
 244         init_nec_8048_wvga_lcd(spi);
 245
 246         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 247         if (ddata == NULL)
 248                 return -ENOMEM;
 249
 250         dev_set_drvdata(&spi->dev, ddata);
 251
 252         ddata->spi = spi;
 253
 254         ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node);
 255         r = PTR_ERR_OR_ZERO(ddata->in);
 256         if (r) {
 257                 dev_err(&spi->dev, "failed to find video source: %d\n", r);
 258                 return r;
 259         }
 260
 261         ddata->res_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
 262         r = PTR_ERR_OR_ZERO(ddata->res_gpio);
 263         if (r) {
 264                 dev_err(&spi->dev, "failed to request reset gpio: %d\n", r);
 265                 goto err_gpio;
 266         }
 267
 268         gpiod_set_consumer_name(ddata->res_gpio, "lcd RES");
 269
 270         ddata->videomode = nec_8048_panel_timings;
 271
 272         dssdev = &ddata->dssdev;
 273         dssdev->dev = &spi->dev;
 274         dssdev->driver = &nec_8048_ops;
 275         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 276         dssdev->owner = THIS_MODULE;
 277         dssdev->panel.timings = ddata->videomode;
 278
 279         r = omapdss_register_display(dssdev);
 280         if (r) {
 281                 dev_err(&spi->dev, "Failed to register panel\n");
 282                 goto err_reg;
 283         }
 284
 285         return 0;
 286
 287 err_reg:
 288 err_gpio:
 289         omap_dss_put_device(ddata->in);
 290         return r;
 291 }
 292
 293 static void nec_8048_remove(struct spi_device *spi)
 294 {
 295         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 296         struct omap_dss_device *dssdev = &ddata->dssdev;
 297         struct omap_dss_device *in = ddata->in;
 298
 299         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
 300
 301         omapdss_unregister_display(dssdev);
 302
 303         nec_8048_disable(dssdev);
 304         nec_8048_disconnect(dssdev);
 305
 306         omap_dss_put_device(in);
 307 }
 308
 309 #ifdef CONFIG_PM_SLEEP
 310 static int nec_8048_suspend(struct device *dev)
 311 {
 312         struct spi_device *spi = to_spi_device(dev);
 313
 314         nec_8048_spi_send(spi, 2, 0x01);
 315         mdelay(40);
 316
 317         return 0;
 318 }
 319
 320 static int nec_8048_resume(struct device *dev)
 321 {
 322         struct spi_device *spi = to_spi_device(dev);
 323
 324         /* reinitialize the panel */
 325         spi_setup(spi);
 326         nec_8048_spi_send(spi, 2, 0x00);
 327         init_nec_8048_wvga_lcd(spi);
 328
 329         return 0;
 330 }
 331 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
 332                 nec_8048_resume);
 333 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
 334 #else
 335 #define NEC_8048_PM_OPS NULL
 336 #endif
 337
 338 static const struct of_device_id nec_8048_of_match[] = {
 339         { .compatible = "omapdss,nec,nl8048hl11", },
 340         {},
 341 };
 342
 343 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
 344
 345 static struct spi_driver nec_8048_driver = {
 346         .driver = {
 347                 .name   = "panel-nec-nl8048hl11",
 348                 .pm     = NEC_8048_PM_OPS,
 349                 .of_match_table = nec_8048_of_match,
 350                 .suppress_bind_attrs = true,
 351         },
 352         .probe  = nec_8048_probe,
 353         .remove = nec_8048_remove,
 354 };
 355
 356 module_spi_driver(nec_8048_driver);
 357
 358 MODULE_ALIAS("spi:nec,nl8048hl11");
 359 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
 360 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
 361 MODULE_LICENSE("GPL");