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"); 401