Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 1 | /* |
| 2 | * LCD panel driver for Sharp LS037V7DW01 |
| 3 | * |
| 4 | * Copyright (C) 2013 Texas Instruments |
| 5 | * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 as published by |
| 9 | * the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/delay.h> |
Tomi Valkeinen | d9e32ec | 2016-03-18 09:02:18 +0200 | [diff] [blame] | 13 | #include <linux/gpio/consumer.h> |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 14 | #include <linux/module.h> |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 15 | #include <linux/of.h> |
| 16 | #include <linux/of_gpio.h> |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/slab.h> |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 19 | #include <linux/regulator/consumer.h> |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 20 | #include <video/omapdss.h> |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 21 | |
| 22 | struct panel_drv_data { |
| 23 | struct omap_dss_device dssdev; |
| 24 | struct omap_dss_device *in; |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 25 | struct regulator *vcc; |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 26 | |
| 27 | int data_lines; |
| 28 | |
| 29 | struct omap_video_timings videomode; |
| 30 | |
Tony Lindgren | 9522f9f | 2014-04-28 20:22:20 -0700 | [diff] [blame] | 31 | struct gpio_desc *resb_gpio; /* low = reset active min 20 us */ |
| 32 | struct gpio_desc *ini_gpio; /* high = power on */ |
| 33 | struct gpio_desc *mo_gpio; /* low = 480x640, high = 240x320 */ |
| 34 | struct gpio_desc *lr_gpio; /* high = conventional horizontal scanning */ |
| 35 | struct gpio_desc *ud_gpio; /* high = conventional vertical scanning */ |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 36 | }; |
| 37 | |
| 38 | static const struct omap_video_timings sharp_ls_timings = { |
| 39 | .x_res = 480, |
| 40 | .y_res = 640, |
| 41 | |
Tomi Valkeinen | d8d78941 | 2013-04-10 14:12:14 +0300 | [diff] [blame] | 42 | .pixelclock = 19200000, |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 43 | |
| 44 | .hsw = 2, |
| 45 | .hfp = 1, |
| 46 | .hbp = 28, |
| 47 | |
| 48 | .vsw = 1, |
| 49 | .vfp = 1, |
| 50 | .vbp = 1, |
| 51 | |
| 52 | .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 53 | .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, |
| 54 | .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, |
| 55 | .de_level = OMAPDSS_SIG_ACTIVE_HIGH, |
Tomi Valkeinen | 7a16360 | 2014-10-02 17:58:48 +0000 | [diff] [blame] | 56 | .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE, |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) |
| 60 | |
| 61 | static int sharp_ls_connect(struct omap_dss_device *dssdev) |
| 62 | { |
| 63 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 64 | struct omap_dss_device *in = ddata->in; |
| 65 | int r; |
| 66 | |
| 67 | if (omapdss_device_is_connected(dssdev)) |
| 68 | return 0; |
| 69 | |
| 70 | r = in->ops.dpi->connect(in, dssdev); |
| 71 | if (r) |
| 72 | return r; |
| 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static void sharp_ls_disconnect(struct omap_dss_device *dssdev) |
| 78 | { |
| 79 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 80 | struct omap_dss_device *in = ddata->in; |
| 81 | |
| 82 | if (!omapdss_device_is_connected(dssdev)) |
| 83 | return; |
| 84 | |
| 85 | in->ops.dpi->disconnect(in, dssdev); |
| 86 | } |
| 87 | |
| 88 | static int sharp_ls_enable(struct omap_dss_device *dssdev) |
| 89 | { |
| 90 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 91 | struct omap_dss_device *in = ddata->in; |
| 92 | int r; |
| 93 | |
| 94 | if (!omapdss_device_is_connected(dssdev)) |
| 95 | return -ENODEV; |
| 96 | |
| 97 | if (omapdss_device_is_enabled(dssdev)) |
| 98 | return 0; |
| 99 | |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 100 | if (ddata->data_lines) |
| 101 | in->ops.dpi->set_data_lines(in, ddata->data_lines); |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 102 | in->ops.dpi->set_timings(in, &ddata->videomode); |
| 103 | |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 104 | if (ddata->vcc) { |
| 105 | r = regulator_enable(ddata->vcc); |
| 106 | if (r != 0) |
| 107 | return r; |
| 108 | } |
| 109 | |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 110 | r = in->ops.dpi->enable(in); |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 111 | if (r) { |
| 112 | regulator_disable(ddata->vcc); |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 113 | return r; |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 114 | } |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 115 | |
| 116 | /* wait couple of vsyncs until enabling the LCD */ |
| 117 | msleep(50); |
| 118 | |
Tony Lindgren | 9522f9f | 2014-04-28 20:22:20 -0700 | [diff] [blame] | 119 | if (ddata->resb_gpio) |
| 120 | gpiod_set_value_cansleep(ddata->resb_gpio, 1); |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 121 | |
Tony Lindgren | 9522f9f | 2014-04-28 20:22:20 -0700 | [diff] [blame] | 122 | if (ddata->ini_gpio) |
| 123 | gpiod_set_value_cansleep(ddata->ini_gpio, 1); |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 124 | |
| 125 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; |
| 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static void sharp_ls_disable(struct omap_dss_device *dssdev) |
| 131 | { |
| 132 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 133 | struct omap_dss_device *in = ddata->in; |
| 134 | |
| 135 | if (!omapdss_device_is_enabled(dssdev)) |
| 136 | return; |
| 137 | |
Tony Lindgren | 9522f9f | 2014-04-28 20:22:20 -0700 | [diff] [blame] | 138 | if (ddata->ini_gpio) |
| 139 | gpiod_set_value_cansleep(ddata->ini_gpio, 0); |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 140 | |
Tony Lindgren | 9522f9f | 2014-04-28 20:22:20 -0700 | [diff] [blame] | 141 | if (ddata->resb_gpio) |
| 142 | gpiod_set_value_cansleep(ddata->resb_gpio, 0); |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 143 | |
| 144 | /* wait at least 5 vsyncs after disabling the LCD */ |
| 145 | |
| 146 | msleep(100); |
| 147 | |
| 148 | in->ops.dpi->disable(in); |
| 149 | |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 150 | if (ddata->vcc) |
| 151 | regulator_disable(ddata->vcc); |
| 152 | |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 153 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; |
| 154 | } |
| 155 | |
| 156 | static void sharp_ls_set_timings(struct omap_dss_device *dssdev, |
| 157 | struct omap_video_timings *timings) |
| 158 | { |
| 159 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 160 | struct omap_dss_device *in = ddata->in; |
| 161 | |
| 162 | ddata->videomode = *timings; |
| 163 | dssdev->panel.timings = *timings; |
| 164 | |
| 165 | in->ops.dpi->set_timings(in, timings); |
| 166 | } |
| 167 | |
| 168 | static void sharp_ls_get_timings(struct omap_dss_device *dssdev, |
| 169 | struct omap_video_timings *timings) |
| 170 | { |
| 171 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 172 | |
| 173 | *timings = ddata->videomode; |
| 174 | } |
| 175 | |
| 176 | static int sharp_ls_check_timings(struct omap_dss_device *dssdev, |
| 177 | struct omap_video_timings *timings) |
| 178 | { |
| 179 | struct panel_drv_data *ddata = to_panel_data(dssdev); |
| 180 | struct omap_dss_device *in = ddata->in; |
| 181 | |
| 182 | return in->ops.dpi->check_timings(in, timings); |
| 183 | } |
| 184 | |
| 185 | static struct omap_dss_driver sharp_ls_ops = { |
| 186 | .connect = sharp_ls_connect, |
| 187 | .disconnect = sharp_ls_disconnect, |
| 188 | |
| 189 | .enable = sharp_ls_enable, |
| 190 | .disable = sharp_ls_disable, |
| 191 | |
| 192 | .set_timings = sharp_ls_set_timings, |
| 193 | .get_timings = sharp_ls_get_timings, |
| 194 | .check_timings = sharp_ls_check_timings, |
| 195 | |
| 196 | .get_resolution = omapdss_default_get_resolution, |
| 197 | }; |
| 198 | |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 199 | static int sharp_ls_get_gpio_of(struct device *dev, int index, int val, |
| 200 | const char *desc, struct gpio_desc **gpiod) |
| 201 | { |
| 202 | struct gpio_desc *gd; |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 203 | |
| 204 | *gpiod = NULL; |
| 205 | |
Uwe Kleine-König | ca8c67d | 2015-05-28 10:05:15 +0200 | [diff] [blame] | 206 | gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW); |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 207 | if (IS_ERR(gd)) |
Uwe Kleine-König | ca8c67d | 2015-05-28 10:05:15 +0200 | [diff] [blame] | 208 | return PTR_ERR(gd); |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 209 | |
| 210 | *gpiod = gd; |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static int sharp_ls_probe_of(struct platform_device *pdev) |
| 215 | { |
| 216 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 217 | struct device_node *node = pdev->dev.of_node; |
| 218 | struct omap_dss_device *in; |
| 219 | int r; |
| 220 | |
| 221 | ddata->vcc = devm_regulator_get(&pdev->dev, "envdd"); |
| 222 | if (IS_ERR(ddata->vcc)) { |
| 223 | dev_err(&pdev->dev, "failed to get regulator\n"); |
| 224 | return PTR_ERR(ddata->vcc); |
| 225 | } |
| 226 | |
| 227 | /* lcd INI */ |
| 228 | r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio); |
| 229 | if (r) |
| 230 | return r; |
| 231 | |
| 232 | /* lcd RESB */ |
| 233 | r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio); |
| 234 | if (r) |
| 235 | return r; |
| 236 | |
| 237 | /* lcd MO */ |
| 238 | r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio); |
| 239 | if (r) |
| 240 | return r; |
| 241 | |
| 242 | /* lcd LR */ |
| 243 | r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio); |
| 244 | if (r) |
| 245 | return r; |
| 246 | |
| 247 | /* lcd UD */ |
| 248 | r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio); |
| 249 | if (r) |
| 250 | return r; |
| 251 | |
| 252 | in = omapdss_of_find_source_for_first_ep(node); |
| 253 | if (IS_ERR(in)) { |
| 254 | dev_err(&pdev->dev, "failed to find video source\n"); |
| 255 | return PTR_ERR(in); |
| 256 | } |
| 257 | |
| 258 | ddata->in = in; |
| 259 | |
| 260 | return 0; |
| 261 | } |
| 262 | |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 263 | static int sharp_ls_probe(struct platform_device *pdev) |
| 264 | { |
| 265 | struct panel_drv_data *ddata; |
| 266 | struct omap_dss_device *dssdev; |
| 267 | int r; |
| 268 | |
| 269 | ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); |
| 270 | if (ddata == NULL) |
| 271 | return -ENOMEM; |
| 272 | |
| 273 | platform_set_drvdata(pdev, ddata); |
| 274 | |
Tomi Valkeinen | 393c269 | 2016-02-22 18:13:36 +0200 | [diff] [blame] | 275 | if (!pdev->dev.of_node) |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 276 | return -ENODEV; |
Tomi Valkeinen | 393c269 | 2016-02-22 18:13:36 +0200 | [diff] [blame] | 277 | |
| 278 | r = sharp_ls_probe_of(pdev); |
| 279 | if (r) |
| 280 | return r; |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 281 | |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 282 | ddata->videomode = sharp_ls_timings; |
| 283 | |
| 284 | dssdev = &ddata->dssdev; |
| 285 | dssdev->dev = &pdev->dev; |
| 286 | dssdev->driver = &sharp_ls_ops; |
| 287 | dssdev->type = OMAP_DISPLAY_TYPE_DPI; |
| 288 | dssdev->owner = THIS_MODULE; |
| 289 | dssdev->panel.timings = ddata->videomode; |
| 290 | dssdev->phy.dpi.data_lines = ddata->data_lines; |
| 291 | |
| 292 | r = omapdss_register_display(dssdev); |
| 293 | if (r) { |
| 294 | dev_err(&pdev->dev, "Failed to register panel\n"); |
| 295 | goto err_reg; |
| 296 | } |
| 297 | |
| 298 | return 0; |
| 299 | |
| 300 | err_reg: |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 301 | omap_dss_put_device(ddata->in); |
| 302 | return r; |
| 303 | } |
| 304 | |
| 305 | static int __exit sharp_ls_remove(struct platform_device *pdev) |
| 306 | { |
| 307 | struct panel_drv_data *ddata = platform_get_drvdata(pdev); |
| 308 | struct omap_dss_device *dssdev = &ddata->dssdev; |
| 309 | struct omap_dss_device *in = ddata->in; |
| 310 | |
| 311 | omapdss_unregister_display(dssdev); |
| 312 | |
| 313 | sharp_ls_disable(dssdev); |
| 314 | sharp_ls_disconnect(dssdev); |
| 315 | |
| 316 | omap_dss_put_device(in); |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 321 | static const struct of_device_id sharp_ls_of_match[] = { |
| 322 | { .compatible = "omapdss,sharp,ls037v7dw01", }, |
| 323 | {}, |
| 324 | }; |
| 325 | |
| 326 | MODULE_DEVICE_TABLE(of, sharp_ls_of_match); |
| 327 | |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 328 | static struct platform_driver sharp_ls_driver = { |
| 329 | .probe = sharp_ls_probe, |
| 330 | .remove = __exit_p(sharp_ls_remove), |
| 331 | .driver = { |
| 332 | .name = "panel-sharp-ls037v7dw01", |
Tony Lindgren | be88c16 | 2014-05-16 09:45:09 +0300 | [diff] [blame] | 333 | .of_match_table = sharp_ls_of_match, |
Tomi Valkeinen | 422ccbd | 2014-10-16 09:54:25 +0300 | [diff] [blame] | 334 | .suppress_bind_attrs = true, |
Tomi Valkeinen | 922ae89 | 2013-05-31 12:14:01 +0300 | [diff] [blame] | 335 | }, |
| 336 | }; |
| 337 | |
| 338 | module_platform_driver(sharp_ls_driver); |
| 339 | |
| 340 | MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); |
| 341 | MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver"); |
| 342 | MODULE_LICENSE("GPL"); |