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