Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 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> |
Arnd Bergmann | d0196c8 | 2016-05-11 18:05:39 +0200 | [diff] [blame] | 17 | #include <linux/gpio/consumer.h> |
Tomi Valkeinen | b36250d | 2014-05-16 12:39:29 +0300 | [diff] [blame] | 18 | #include <linux/of_gpio.h> |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 19 | |
Peter Ujfalusi | 32043da | 2016-05-27 14:40:49 +0300 | [diff] [blame] | 20 | #include "../dss/omapdss.h" |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 21 | |
| 22 | struct panel_drv_data { |
| 23 | struct omap_dss_device dssdev; |
| 24 | struct omap_dss_device *in; |
| 25 | |
| 26 | struct omap_video_timings videomode; |
| 27 | |
| 28 | int data_lines; |
| 29 | |
| 30 | int res_gpio; |
| 31 | int qvga_gpio; |
| 32 | |
| 33 | struct spi_device *spi; |
| 34 | }; |
| 35 | |
| 36 | #define LCD_XRES 800 |
| 37 | #define LCD_YRES 480 |
| 38 | /* |
| 39 | * NEC PIX Clock Ratings |
| 40 | * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz |
| 41 | */ |
Tomi Valkeinen | d8d78941 | 2013-04-10 14:12:14 +0300 | [diff] [blame] | 42 | #define LCD_PIXEL_CLOCK 23800000 |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 43 | |
| 44 | static const struct { |
| 45 | unsigned char addr; |
| 46 | unsigned char dat; |
| 47 | } nec_8048_init_seq[] = { |
| 48 | { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 }, |
| 49 | { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 }, |
| 50 | { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 }, |
| 51 | { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F }, |
| 52 | { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F }, |
| 53 | { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F }, |
| 54 | { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F }, |
| 55 | { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 }, |
| 56 | { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 }, |
| 57 | { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C }, |
| 58 | { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 }, |
| 59 | { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 }, |
| 60 | { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 }, |
| 61 | { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 }, |
| 62 | { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC }, |
| 63 | { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 }, |
| 64 | { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 }, |
| 65 | { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 }, |
| 66 | }; |
| 67 | |
| 68 | static const struct omap_video_timings nec_8048_panel_timings = { |
| 69 | .x_res = LCD_XRES, |
| 70 | .y_res = LCD_YRES, |
Tomi Valkeinen | d8d78941 | 2013-04-10 14:12:14 +0300 | [diff] [blame] | 71 | .pixelclock = LCD_PIXEL_CLOCK, |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 72 | .hfp = 6, |
| 73 | .hsw = 1, |
| 74 | .hbp = 4, |
| 75 | .vfp = 3, |
| 76 | .vsw = 1, |
| 77 | .vbp = 4, |
| 78 | |
| 79 | .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 80 | .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 81 | .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, |
| 82 | .de_level = OMAPDSS_SIG_ACTIVE_HIGH, |
| 83 | .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, |
| 84 | }; |
| 85 | |
| 86 | #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) |
| 87 | |
| 88 | static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr, |
| 89 | unsigned char reg_data) |
| 90 | { |
| 91 | int ret = 0; |
| 92 | unsigned int cmd = 0, data = 0; |
| 93 | |
| 94 | cmd = 0x0000 | reg_addr; /* register address write */ |
| 95 | data = 0x0100 | reg_data; /* register data write */ |
| 96 | data = (cmd << 16) | data; |
| 97 | |
| 98 | ret = spi_write(spi, (unsigned char *)&data, 4); |
| 99 | if (ret) |
| 100 | pr_err("error in spi_write %x\n", data); |
| 101 | |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | static int init_nec_8048_wvga_lcd(struct spi_device *spi) |
| 106 | { |
| 107 | unsigned int i; |
| 108 | /* Initialization Sequence */ |
| 109 | /* nec_8048_spi_send(spi, REG, VAL) */ |
| 110 | for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++) |
| 111 | nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, |
| 112 | nec_8048_init_seq[i].dat); |
| 113 | udelay(20); |
| 114 | nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, |
| 115 | nec_8048_init_seq[i].dat); |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | static int nec_8048_connect(struct omap_dss_device *dssdev) |
| 120 | { |
| 121 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 122 | struct omap_dss_device *in = ddata->in; |
| 123 | int r; |
| 124 | |
| 125 | if (omapdss_device_is_connected(dssdev)) |
| 126 | return 0; |
| 127 | |
| 128 | r = in->ops.dpi->connect(in, dssdev); |
| 129 | if (r) |
| 130 | return r; |
| 131 | |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | static void nec_8048_disconnect(struct omap_dss_device *dssdev) |
| 136 | { |
| 137 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 138 | struct omap_dss_device *in = ddata->in; |
| 139 | |
| 140 | if (!omapdss_device_is_connected(dssdev)) |
| 141 | return; |
| 142 | |
| 143 | in->ops.dpi->disconnect(in, dssdev); |
| 144 | } |
| 145 | |
| 146 | static int nec_8048_enable(struct omap_dss_device *dssdev) |
| 147 | { |
| 148 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 149 | struct omap_dss_device *in = ddata->in; |
| 150 | int r; |
| 151 | |
| 152 | if (!omapdss_device_is_connected(dssdev)) |
| 153 | return -ENODEV; |
| 154 | |
| 155 | if (omapdss_device_is_enabled(dssdev)) |
| 156 | return 0; |
| 157 | |
Tomi Valkeinen | b36250d | 2014-05-16 12:39:29 +0300 | [diff] [blame] | 158 | if (ddata->data_lines) |
| 159 | in->ops.dpi->set_data_lines(in, ddata->data_lines); |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 160 | in->ops.dpi->set_timings(in, &ddata->videomode); |
| 161 | |
| 162 | r = in->ops.dpi->enable(in); |
| 163 | if (r) |
| 164 | return r; |
| 165 | |
| 166 | if (gpio_is_valid(ddata->res_gpio)) |
| 167 | gpio_set_value_cansleep(ddata->res_gpio, 1); |
| 168 | |
| 169 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static void nec_8048_disable(struct omap_dss_device *dssdev) |
| 175 | { |
| 176 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 177 | struct omap_dss_device *in = ddata->in; |
| 178 | |
| 179 | if (!omapdss_device_is_enabled(dssdev)) |
| 180 | return; |
| 181 | |
| 182 | if (gpio_is_valid(ddata->res_gpio)) |
| 183 | gpio_set_value_cansleep(ddata->res_gpio, 0); |
| 184 | |
| 185 | in->ops.dpi->disable(in); |
| 186 | |
| 187 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| 188 | } |
| 189 | |
| 190 | static void nec_8048_set_timings(struct omap_dss_device *dssdev, |
| 191 | struct omap_video_timings *timings) |
| 192 | { |
| 193 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 194 | struct omap_dss_device *in = ddata->in; |
| 195 | |
| 196 | ddata->videomode = *timings; |
| 197 | dssdev->panel.timings = *timings; |
| 198 | |
| 199 | in->ops.dpi->set_timings(in, timings); |
| 200 | } |
| 201 | |
| 202 | static void nec_8048_get_timings(struct omap_dss_device *dssdev, |
| 203 | struct omap_video_timings *timings) |
| 204 | { |
| 205 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 206 | |
| 207 | *timings = ddata->videomode; |
| 208 | } |
| 209 | |
| 210 | static int nec_8048_check_timings(struct omap_dss_device *dssdev, |
| 211 | struct omap_video_timings *timings) |
| 212 | { |
| 213 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 214 | struct omap_dss_device *in = ddata->in; |
| 215 | |
| 216 | return in->ops.dpi->check_timings(in, timings); |
| 217 | } |
| 218 | |
| 219 | static struct omap_dss_driver nec_8048_ops = { |
| 220 | .connect = nec_8048_connect, |
| 221 | .disconnect = nec_8048_disconnect, |
| 222 | |
| 223 | .enable = nec_8048_enable, |
| 224 | .disable = nec_8048_disable, |
| 225 | |
| 226 | .set_timings = nec_8048_set_timings, |
| 227 | .get_timings = nec_8048_get_timings, |
| 228 | .check_timings = nec_8048_check_timings, |
| 229 | |
| 230 | .get_resolution = omapdss_default_get_resolution, |
| 231 | }; |
| 232 | |
Tomi Valkeinen | b36250d | 2014-05-16 12:39:29 +0300 | [diff] [blame] | 233 | static int nec_8048_probe_of(struct spi_device *spi) |
| 234 | { |
| 235 | struct device_node *node = spi->dev.of_node; |
| 236 | struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); |
| 237 | struct omap_dss_device *in; |
| 238 | int gpio; |
| 239 | |
| 240 | gpio = of_get_named_gpio(node, "reset-gpios", 0); |
| 241 | if (!gpio_is_valid(gpio)) { |
| 242 | dev_err(&spi->dev, "failed to parse enable gpio\n"); |
| 243 | return gpio; |
| 244 | } |
| 245 | ddata->res_gpio = gpio; |
| 246 | |
| 247 | /* XXX the panel spec doesn't mention any QVGA pin?? */ |
| 248 | ddata->qvga_gpio = -ENOENT; |
| 249 | |
| 250 | in = omapdss_of_find_source_for_first_ep(node); |
| 251 | if (IS_ERR(in)) { |
| 252 | dev_err(&spi->dev, "failed to find video source\n"); |
| 253 | return PTR_ERR(in); |
| 254 | } |
| 255 | |
| 256 | ddata->in = in; |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 261 | static int nec_8048_probe(struct spi_device *spi) |
| 262 | { |
| 263 | struct panel_drv_data *ddata; |
| 264 | struct omap_dss_device *dssdev; |
| 265 | int r; |
| 266 | |
| 267 | dev_dbg(&spi->dev, "%s\n", __func__); |
| 268 | |
| 269 | spi->mode = SPI_MODE_0; |
| 270 | spi->bits_per_word = 32; |
| 271 | |
| 272 | r = spi_setup(spi); |
| 273 | if (r < 0) { |
| 274 | dev_err(&spi->dev, "spi_setup failed: %d\n", r); |
| 275 | return r; |
| 276 | } |
| 277 | |
| 278 | init_nec_8048_wvga_lcd(spi); |
| 279 | |
| 280 | ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); |
| 281 | if (ddata == NULL) |
| 282 | return -ENOMEM; |
| 283 | |
| 284 | dev_set_drvdata(&spi->dev, ddata); |
| 285 | |
| 286 | ddata->spi = spi; |
| 287 | |
Tomi Valkeinen | 367aa94 | 2016-02-18 17:27:55 +0200 | [diff] [blame] | 288 | if (!spi->dev.of_node) |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 289 | return -ENODEV; |
Tomi Valkeinen | 367aa94 | 2016-02-18 17:27:55 +0200 | [diff] [blame] | 290 | |
| 291 | r = nec_8048_probe_of(spi); |
| 292 | if (r) |
| 293 | return r; |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 294 | |
| 295 | if (gpio_is_valid(ddata->qvga_gpio)) { |
| 296 | r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio, |
| 297 | GPIOF_OUT_INIT_HIGH, "lcd QVGA"); |
| 298 | if (r) |
| 299 | goto err_gpio; |
| 300 | } |
| 301 | |
| 302 | if (gpio_is_valid(ddata->res_gpio)) { |
| 303 | r = devm_gpio_request_one(&spi->dev, ddata->res_gpio, |
| 304 | GPIOF_OUT_INIT_LOW, "lcd RES"); |
| 305 | if (r) |
| 306 | goto err_gpio; |
| 307 | } |
| 308 | |
| 309 | ddata->videomode = nec_8048_panel_timings; |
| 310 | |
| 311 | dssdev = &ddata->dssdev; |
| 312 | dssdev->dev = &spi->dev; |
| 313 | dssdev->driver = &nec_8048_ops; |
| 314 | dssdev->type = OMAP_DISPLAY_TYPE_DPI; |
| 315 | dssdev->owner = THIS_MODULE; |
| 316 | dssdev->panel.timings = ddata->videomode; |
| 317 | |
| 318 | r = omapdss_register_display(dssdev); |
| 319 | if (r) { |
| 320 | dev_err(&spi->dev, "Failed to register panel\n"); |
| 321 | goto err_reg; |
| 322 | } |
| 323 | |
| 324 | return 0; |
| 325 | |
| 326 | err_reg: |
| 327 | err_gpio: |
| 328 | omap_dss_put_device(ddata->in); |
| 329 | return r; |
| 330 | } |
| 331 | |
| 332 | static int nec_8048_remove(struct spi_device *spi) |
| 333 | { |
| 334 | struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); |
| 335 | struct omap_dss_device *dssdev = &ddata->dssdev; |
| 336 | struct omap_dss_device *in = ddata->in; |
| 337 | |
| 338 | dev_dbg(&ddata->spi->dev, "%s\n", __func__); |
| 339 | |
| 340 | omapdss_unregister_display(dssdev); |
| 341 | |
| 342 | nec_8048_disable(dssdev); |
| 343 | nec_8048_disconnect(dssdev); |
| 344 | |
| 345 | omap_dss_put_device(in); |
| 346 | |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | #ifdef CONFIG_PM_SLEEP |
| 351 | static int nec_8048_suspend(struct device *dev) |
| 352 | { |
| 353 | struct spi_device *spi = to_spi_device(dev); |
| 354 | |
| 355 | nec_8048_spi_send(spi, 2, 0x01); |
| 356 | mdelay(40); |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | static int nec_8048_resume(struct device *dev) |
| 362 | { |
| 363 | struct spi_device *spi = to_spi_device(dev); |
| 364 | |
| 365 | /* reinitialize the panel */ |
| 366 | spi_setup(spi); |
| 367 | nec_8048_spi_send(spi, 2, 0x00); |
| 368 | init_nec_8048_wvga_lcd(spi); |
| 369 | |
| 370 | return 0; |
| 371 | } |
| 372 | static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend, |
| 373 | nec_8048_resume); |
| 374 | #define NEC_8048_PM_OPS (&nec_8048_pm_ops) |
| 375 | #else |
| 376 | #define NEC_8048_PM_OPS NULL |
| 377 | #endif |
| 378 | |
Tomi Valkeinen | b36250d | 2014-05-16 12:39:29 +0300 | [diff] [blame] | 379 | static const struct of_device_id nec_8048_of_match[] = { |
| 380 | { .compatible = "omapdss,nec,nl8048hl11", }, |
| 381 | {}, |
| 382 | }; |
| 383 | |
| 384 | MODULE_DEVICE_TABLE(of, nec_8048_of_match); |
| 385 | |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 386 | static struct spi_driver nec_8048_driver = { |
| 387 | .driver = { |
| 388 | .name = "panel-nec-nl8048hl11", |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 389 | .pm = NEC_8048_PM_OPS, |
Tomi Valkeinen | b36250d | 2014-05-16 12:39:29 +0300 | [diff] [blame] | 390 | .of_match_table = nec_8048_of_match, |
Tomi Valkeinen | 422ccbd | 2014-10-16 09:54:25 +0300 | [diff] [blame] | 391 | .suppress_bind_attrs = true, |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 392 | }, |
| 393 | .probe = nec_8048_probe, |
| 394 | .remove = nec_8048_remove, |
| 395 | }; |
| 396 | |
| 397 | module_spi_driver(nec_8048_driver); |
| 398 | |
Tomi Valkeinen | b36250d | 2014-05-16 12:39:29 +0300 | [diff] [blame] | 399 | MODULE_ALIAS("spi:nec,nl8048hl11"); |
Tomi Valkeinen | 6077ce8 | 2013-05-31 13:39:31 +0300 | [diff] [blame] | 400 | MODULE_AUTHOR("Erik Gilling <konkers@android.com>"); |
| 401 | MODULE_DESCRIPTION("NEC-NL8048HL11 Driver"); |
| 402 | MODULE_LICENSE("GPL"); |