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 #include <linux/of_gpio.h> 20 21 #include <video/omapdss.h> 22 #include <video/omap-panel-data.h> 23 24 struct panel_drv_data { 25 struct omap_dss_device dssdev; 26 struct omap_dss_device *in; 27 28 struct omap_video_timings videomode; 29 30 int data_lines; 31 32 int res_gpio; 33 int qvga_gpio; 34 35 struct spi_device *spi; 36 }; 37 38 #define LCD_XRES 800 39 #define LCD_YRES 480 40 /* 41 * NEC PIX Clock Ratings 42 * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz 43 */ 44 #define LCD_PIXEL_CLOCK 23800000 45 46 static const struct { 47 unsigned char addr; 48 unsigned char dat; 49 } nec_8048_init_seq[] = { 50 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 }, 51 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 }, 52 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 }, 53 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F }, 54 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F }, 55 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F }, 56 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F }, 57 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 }, 58 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 }, 59 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C }, 60 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 }, 61 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 }, 62 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 }, 63 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 }, 64 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC }, 65 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 }, 66 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 }, 67 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 }, 68 }; 69 70 static const struct omap_video_timings nec_8048_panel_timings = { 71 .x_res = LCD_XRES, 72 .y_res = LCD_YRES, 73 .pixelclock = LCD_PIXEL_CLOCK, 74 .hfp = 6, 75 .hsw = 1, 76 .hbp = 4, 77 .vfp = 3, 78 .vsw = 1, 79 .vbp = 4, 80 81 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, 82 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, 83 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, 84 .de_level = OMAPDSS_SIG_ACTIVE_HIGH, 85 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, 86 }; 87 88 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) 89 90 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr, 91 unsigned char reg_data) 92 { 93 int ret = 0; 94 unsigned int cmd = 0, data = 0; 95 96 cmd = 0x0000 | reg_addr; /* register address write */ 97 data = 0x0100 | reg_data; /* register data write */ 98 data = (cmd << 16) | data; 99 100 ret = spi_write(spi, (unsigned char *)&data, 4); 101 if (ret) 102 pr_err("error in spi_write %x\n", data); 103 104 return ret; 105 } 106 107 static int init_nec_8048_wvga_lcd(struct spi_device *spi) 108 { 109 unsigned int i; 110 /* Initialization Sequence */ 111 /* nec_8048_spi_send(spi, REG, VAL) */ 112 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++) 113 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, 114 nec_8048_init_seq[i].dat); 115 udelay(20); 116 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, 117 nec_8048_init_seq[i].dat); 118 return 0; 119 } 120 121 static int nec_8048_connect(struct omap_dss_device *dssdev) 122 { 123 struct panel_drv_data *ddata = to_panel_data(dssdev); 124 struct omap_dss_device *in = ddata->in; 125 int r; 126 127 if (omapdss_device_is_connected(dssdev)) 128 return 0; 129 130 r = in->ops.dpi->connect(in, dssdev); 131 if (r) 132 return r; 133 134 return 0; 135 } 136 137 static void nec_8048_disconnect(struct omap_dss_device *dssdev) 138 { 139 struct panel_drv_data *ddata = to_panel_data(dssdev); 140 struct omap_dss_device *in = ddata->in; 141 142 if (!omapdss_device_is_connected(dssdev)) 143 return; 144 145 in->ops.dpi->disconnect(in, dssdev); 146 } 147 148 static int nec_8048_enable(struct omap_dss_device *dssdev) 149 { 150 struct panel_drv_data *ddata = to_panel_data(dssdev); 151 struct omap_dss_device *in = ddata->in; 152 int r; 153 154 if (!omapdss_device_is_connected(dssdev)) 155 return -ENODEV; 156 157 if (omapdss_device_is_enabled(dssdev)) 158 return 0; 159 160 if (ddata->data_lines) 161 in->ops.dpi->set_data_lines(in, ddata->data_lines); 162 in->ops.dpi->set_timings(in, &ddata->videomode); 163 164 r = in->ops.dpi->enable(in); 165 if (r) 166 return r; 167 168 if (gpio_is_valid(ddata->res_gpio)) 169 gpio_set_value_cansleep(ddata->res_gpio, 1); 170 171 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; 172 173 return 0; 174 } 175 176 static void nec_8048_disable(struct omap_dss_device *dssdev) 177 { 178 struct panel_drv_data *ddata = to_panel_data(dssdev); 179 struct omap_dss_device *in = ddata->in; 180 181 if (!omapdss_device_is_enabled(dssdev)) 182 return; 183 184 if (gpio_is_valid(ddata->res_gpio)) 185 gpio_set_value_cansleep(ddata->res_gpio, 0); 186 187 in->ops.dpi->disable(in); 188 189 dssdev->state = OMAP_DSS_DISPLAY_DISABLED; 190 } 191 192 static void nec_8048_set_timings(struct omap_dss_device *dssdev, 193 struct omap_video_timings *timings) 194 { 195 struct panel_drv_data *ddata = to_panel_data(dssdev); 196 struct omap_dss_device *in = ddata->in; 197 198 ddata->videomode = *timings; 199 dssdev->panel.timings = *timings; 200 201 in->ops.dpi->set_timings(in, timings); 202 } 203 204 static void nec_8048_get_timings(struct omap_dss_device *dssdev, 205 struct omap_video_timings *timings) 206 { 207 struct panel_drv_data *ddata = to_panel_data(dssdev); 208 209 *timings = ddata->videomode; 210 } 211 212 static int nec_8048_check_timings(struct omap_dss_device *dssdev, 213 struct omap_video_timings *timings) 214 { 215 struct panel_drv_data *ddata = to_panel_data(dssdev); 216 struct omap_dss_device *in = ddata->in; 217 218 return in->ops.dpi->check_timings(in, timings); 219 } 220 221 static struct omap_dss_driver nec_8048_ops = { 222 .connect = nec_8048_connect, 223 .disconnect = nec_8048_disconnect, 224 225 .enable = nec_8048_enable, 226 .disable = nec_8048_disable, 227 228 .set_timings = nec_8048_set_timings, 229 .get_timings = nec_8048_get_timings, 230 .check_timings = nec_8048_check_timings, 231 232 .get_resolution = omapdss_default_get_resolution, 233 }; 234 235 236 static int nec_8048_probe_pdata(struct spi_device *spi) 237 { 238 const struct panel_nec_nl8048hl11_platform_data *pdata; 239 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); 240 struct omap_dss_device *dssdev, *in; 241 242 pdata = dev_get_platdata(&spi->dev); 243 244 ddata->qvga_gpio = pdata->qvga_gpio; 245 ddata->res_gpio = pdata->res_gpio; 246 247 in = omap_dss_find_output(pdata->source); 248 if (in == NULL) { 249 dev_err(&spi->dev, "failed to find video source '%s'\n", 250 pdata->source); 251 return -EPROBE_DEFER; 252 } 253 ddata->in = in; 254 255 ddata->data_lines = pdata->data_lines; 256 257 dssdev = &ddata->dssdev; 258 dssdev->name = pdata->name; 259 260 return 0; 261 } 262 263 static int nec_8048_probe_of(struct spi_device *spi) 264 { 265 struct device_node *node = spi->dev.of_node; 266 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); 267 struct omap_dss_device *in; 268 int gpio; 269 270 gpio = of_get_named_gpio(node, "reset-gpios", 0); 271 if (!gpio_is_valid(gpio)) { 272 dev_err(&spi->dev, "failed to parse enable gpio\n"); 273 return gpio; 274 } 275 ddata->res_gpio = gpio; 276 277 /* XXX the panel spec doesn't mention any QVGA pin?? */ 278 ddata->qvga_gpio = -ENOENT; 279 280 in = omapdss_of_find_source_for_first_ep(node); 281 if (IS_ERR(in)) { 282 dev_err(&spi->dev, "failed to find video source\n"); 283 return PTR_ERR(in); 284 } 285 286 ddata->in = in; 287 288 return 0; 289 } 290 291 static int nec_8048_probe(struct spi_device *spi) 292 { 293 struct panel_drv_data *ddata; 294 struct omap_dss_device *dssdev; 295 int r; 296 297 dev_dbg(&spi->dev, "%s\n", __func__); 298 299 spi->mode = SPI_MODE_0; 300 spi->bits_per_word = 32; 301 302 r = spi_setup(spi); 303 if (r < 0) { 304 dev_err(&spi->dev, "spi_setup failed: %d\n", r); 305 return r; 306 } 307 308 init_nec_8048_wvga_lcd(spi); 309 310 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); 311 if (ddata == NULL) 312 return -ENOMEM; 313 314 dev_set_drvdata(&spi->dev, ddata); 315 316 ddata->spi = spi; 317 318 if (dev_get_platdata(&spi->dev)) { 319 r = nec_8048_probe_pdata(spi); 320 if (r) 321 return r; 322 } else if (spi->dev.of_node) { 323 r = nec_8048_probe_of(spi); 324 if (r) 325 return r; 326 } else { 327 return -ENODEV; 328 } 329 330 if (gpio_is_valid(ddata->qvga_gpio)) { 331 r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio, 332 GPIOF_OUT_INIT_HIGH, "lcd QVGA"); 333 if (r) 334 goto err_gpio; 335 } 336 337 if (gpio_is_valid(ddata->res_gpio)) { 338 r = devm_gpio_request_one(&spi->dev, ddata->res_gpio, 339 GPIOF_OUT_INIT_LOW, "lcd RES"); 340 if (r) 341 goto err_gpio; 342 } 343 344 ddata->videomode = nec_8048_panel_timings; 345 346 dssdev = &ddata->dssdev; 347 dssdev->dev = &spi->dev; 348 dssdev->driver = &nec_8048_ops; 349 dssdev->type = OMAP_DISPLAY_TYPE_DPI; 350 dssdev->owner = THIS_MODULE; 351 dssdev->panel.timings = ddata->videomode; 352 353 r = omapdss_register_display(dssdev); 354 if (r) { 355 dev_err(&spi->dev, "Failed to register panel\n"); 356 goto err_reg; 357 } 358 359 return 0; 360 361 err_reg: 362 err_gpio: 363 omap_dss_put_device(ddata->in); 364 return r; 365 } 366 367 static int nec_8048_remove(struct spi_device *spi) 368 { 369 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); 370 struct omap_dss_device *dssdev = &ddata->dssdev; 371 struct omap_dss_device *in = ddata->in; 372 373 dev_dbg(&ddata->spi->dev, "%s\n", __func__); 374 375 omapdss_unregister_display(dssdev); 376 377 nec_8048_disable(dssdev); 378 nec_8048_disconnect(dssdev); 379 380 omap_dss_put_device(in); 381 382 return 0; 383 } 384 385 #ifdef CONFIG_PM_SLEEP 386 static int nec_8048_suspend(struct device *dev) 387 { 388 struct spi_device *spi = to_spi_device(dev); 389 390 nec_8048_spi_send(spi, 2, 0x01); 391 mdelay(40); 392 393 return 0; 394 } 395 396 static int nec_8048_resume(struct device *dev) 397 { 398 struct spi_device *spi = to_spi_device(dev); 399 400 /* reinitialize the panel */ 401 spi_setup(spi); 402 nec_8048_spi_send(spi, 2, 0x00); 403 init_nec_8048_wvga_lcd(spi); 404 405 return 0; 406 } 407 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend, 408 nec_8048_resume); 409 #define NEC_8048_PM_OPS (&nec_8048_pm_ops) 410 #else 411 #define NEC_8048_PM_OPS NULL 412 #endif 413 414 static const struct of_device_id nec_8048_of_match[] = { 415 { .compatible = "omapdss,nec,nl8048hl11", }, 416 {}, 417 }; 418 419 MODULE_DEVICE_TABLE(of, nec_8048_of_match); 420 421 static struct spi_driver nec_8048_driver = { 422 .driver = { 423 .name = "panel-nec-nl8048hl11", 424 .pm = NEC_8048_PM_OPS, 425 .of_match_table = nec_8048_of_match, 426 .suppress_bind_attrs = true, 427 }, 428 .probe = nec_8048_probe, 429 .remove = nec_8048_remove, 430 }; 431 432 module_spi_driver(nec_8048_driver); 433 434 MODULE_ALIAS("spi:nec,nl8048hl11"); 435 MODULE_AUTHOR("Erik Gilling <konkers@android.com>"); 436 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver"); 437 MODULE_LICENSE("GPL"); 438