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; 120 121 if (omapdss_device_is_connected(dssdev)) 122 return 0; 123 124 return in->ops.dpi->connect(in, dssdev); 125 } 126 127 static void nec_8048_disconnect(struct omap_dss_device *dssdev) 128 { 129 struct panel_drv_data *ddata = to_panel_data(dssdev); 130 struct omap_dss_device *in = ddata->in; 131 132 if (!omapdss_device_is_connected(dssdev)) 133 return; 134 135 in->ops.dpi->disconnect(in, dssdev); 136 } 137 138 static int nec_8048_enable(struct omap_dss_device *dssdev) 139 { 140 struct panel_drv_data *ddata = to_panel_data(dssdev); 141 struct omap_dss_device *in = ddata->in; 142 int r; 143 144 if (!omapdss_device_is_connected(dssdev)) 145 return -ENODEV; 146 147 if (omapdss_device_is_enabled(dssdev)) 148 return 0; 149 150 if (ddata->data_lines) 151 in->ops.dpi->set_data_lines(in, ddata->data_lines); 152 in->ops.dpi->set_timings(in, &ddata->videomode); 153 154 r = in->ops.dpi->enable(in); 155 if (r) 156 return r; 157 158 if (gpio_is_valid(ddata->res_gpio)) 159 gpio_set_value_cansleep(ddata->res_gpio, 1); 160 161 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; 162 163 return 0; 164 } 165 166 static void nec_8048_disable(struct omap_dss_device *dssdev) 167 { 168 struct panel_drv_data *ddata = to_panel_data(dssdev); 169 struct omap_dss_device *in = ddata->in; 170 171 if (!omapdss_device_is_enabled(dssdev)) 172 return; 173 174 if (gpio_is_valid(ddata->res_gpio)) 175 gpio_set_value_cansleep(ddata->res_gpio, 0); 176 177 in->ops.dpi->disable(in); 178 179 dssdev->state = OMAP_DSS_DISPLAY_DISABLED; 180 } 181 182 static void nec_8048_set_timings(struct omap_dss_device *dssdev, 183 struct omap_video_timings *timings) 184 { 185 struct panel_drv_data *ddata = to_panel_data(dssdev); 186 struct omap_dss_device *in = ddata->in; 187 188 ddata->videomode = *timings; 189 dssdev->panel.timings = *timings; 190 191 in->ops.dpi->set_timings(in, timings); 192 } 193 194 static void nec_8048_get_timings(struct omap_dss_device *dssdev, 195 struct omap_video_timings *timings) 196 { 197 struct panel_drv_data *ddata = to_panel_data(dssdev); 198 199 *timings = ddata->videomode; 200 } 201 202 static int nec_8048_check_timings(struct omap_dss_device *dssdev, 203 struct omap_video_timings *timings) 204 { 205 struct panel_drv_data *ddata = to_panel_data(dssdev); 206 struct omap_dss_device *in = ddata->in; 207 208 return in->ops.dpi->check_timings(in, timings); 209 } 210 211 static struct omap_dss_driver nec_8048_ops = { 212 .connect = nec_8048_connect, 213 .disconnect = nec_8048_disconnect, 214 215 .enable = nec_8048_enable, 216 .disable = nec_8048_disable, 217 218 .set_timings = nec_8048_set_timings, 219 .get_timings = nec_8048_get_timings, 220 .check_timings = nec_8048_check_timings, 221 222 .get_resolution = omapdss_default_get_resolution, 223 }; 224 225 226 static int nec_8048_probe_of(struct spi_device *spi) 227 { 228 struct device_node *node = spi->dev.of_node; 229 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); 230 struct omap_dss_device *in; 231 int gpio; 232 233 gpio = of_get_named_gpio(node, "reset-gpios", 0); 234 if (!gpio_is_valid(gpio)) { 235 dev_err(&spi->dev, "failed to parse enable gpio\n"); 236 return gpio; 237 } 238 ddata->res_gpio = gpio; 239 240 /* XXX the panel spec doesn't mention any QVGA pin?? */ 241 ddata->qvga_gpio = -ENOENT; 242 243 in = omapdss_of_find_source_for_first_ep(node); 244 if (IS_ERR(in)) { 245 dev_err(&spi->dev, "failed to find video source\n"); 246 return PTR_ERR(in); 247 } 248 249 ddata->in = in; 250 251 return 0; 252 } 253 254 static int nec_8048_probe(struct spi_device *spi) 255 { 256 struct panel_drv_data *ddata; 257 struct omap_dss_device *dssdev; 258 int r; 259 260 dev_dbg(&spi->dev, "%s\n", __func__); 261 262 if (!spi->dev.of_node) 263 return -ENODEV; 264 265 spi->mode = SPI_MODE_0; 266 spi->bits_per_word = 32; 267 268 r = spi_setup(spi); 269 if (r < 0) { 270 dev_err(&spi->dev, "spi_setup failed: %d\n", r); 271 return r; 272 } 273 274 init_nec_8048_wvga_lcd(spi); 275 276 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); 277 if (ddata == NULL) 278 return -ENOMEM; 279 280 dev_set_drvdata(&spi->dev, ddata); 281 282 ddata->spi = spi; 283 284 r = nec_8048_probe_of(spi); 285 if (r) 286 return r; 287 288 if (gpio_is_valid(ddata->qvga_gpio)) { 289 r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio, 290 GPIOF_OUT_INIT_HIGH, "lcd QVGA"); 291 if (r) 292 goto err_gpio; 293 } 294 295 if (gpio_is_valid(ddata->res_gpio)) { 296 r = devm_gpio_request_one(&spi->dev, ddata->res_gpio, 297 GPIOF_OUT_INIT_LOW, "lcd RES"); 298 if (r) 299 goto err_gpio; 300 } 301 302 ddata->videomode = nec_8048_panel_timings; 303 304 dssdev = &ddata->dssdev; 305 dssdev->dev = &spi->dev; 306 dssdev->driver = &nec_8048_ops; 307 dssdev->type = OMAP_DISPLAY_TYPE_DPI; 308 dssdev->owner = THIS_MODULE; 309 dssdev->panel.timings = ddata->videomode; 310 311 r = omapdss_register_display(dssdev); 312 if (r) { 313 dev_err(&spi->dev, "Failed to register panel\n"); 314 goto err_reg; 315 } 316 317 return 0; 318 319 err_reg: 320 err_gpio: 321 omap_dss_put_device(ddata->in); 322 return r; 323 } 324 325 static void nec_8048_remove(struct spi_device *spi) 326 { 327 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); 328 struct omap_dss_device *dssdev = &ddata->dssdev; 329 struct omap_dss_device *in = ddata->in; 330 331 dev_dbg(&ddata->spi->dev, "%s\n", __func__); 332 333 omapdss_unregister_display(dssdev); 334 335 nec_8048_disable(dssdev); 336 nec_8048_disconnect(dssdev); 337 338 omap_dss_put_device(in); 339 } 340 341 #ifdef CONFIG_PM_SLEEP 342 static int nec_8048_suspend(struct device *dev) 343 { 344 struct spi_device *spi = to_spi_device(dev); 345 346 nec_8048_spi_send(spi, 2, 0x01); 347 mdelay(40); 348 349 return 0; 350 } 351 352 static int nec_8048_resume(struct device *dev) 353 { 354 struct spi_device *spi = to_spi_device(dev); 355 356 /* reinitialize the panel */ 357 spi_setup(spi); 358 nec_8048_spi_send(spi, 2, 0x00); 359 init_nec_8048_wvga_lcd(spi); 360 361 return 0; 362 } 363 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend, 364 nec_8048_resume); 365 #define NEC_8048_PM_OPS (&nec_8048_pm_ops) 366 #else 367 #define NEC_8048_PM_OPS NULL 368 #endif 369 370 static const struct of_device_id nec_8048_of_match[] = { 371 { .compatible = "omapdss,nec,nl8048hl11", }, 372 {}, 373 }; 374 375 MODULE_DEVICE_TABLE(of, nec_8048_of_match); 376 377 static struct spi_driver nec_8048_driver = { 378 .driver = { 379 .name = "panel-nec-nl8048hl11", 380 .pm = NEC_8048_PM_OPS, 381 .of_match_table = nec_8048_of_match, 382 .suppress_bind_attrs = true, 383 }, 384 .probe = nec_8048_probe, 385 .remove = nec_8048_remove, 386 }; 387 388 module_spi_driver(nec_8048_driver); 389 390 MODULE_ALIAS("spi:nec,nl8048hl11"); 391 MODULE_AUTHOR("Erik Gilling <konkers@android.com>"); 392 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver"); 393 MODULE_LICENSE("GPL"); 394