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