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922ae890 TV |
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> | |
d9e32ecd | 13 | #include <linux/gpio/consumer.h> |
922ae890 | 14 | #include <linux/module.h> |
be88c16a TL |
15 | #include <linux/of.h> |
16 | #include <linux/of_gpio.h> | |
922ae890 TV |
17 | #include <linux/platform_device.h> |
18 | #include <linux/slab.h> | |
be88c16a | 19 | #include <linux/regulator/consumer.h> |
922ae890 | 20 | #include <video/omapdss.h> |
922ae890 TV |
21 | |
22 | struct panel_drv_data { | |
23 | struct omap_dss_device dssdev; | |
24 | struct omap_dss_device *in; | |
be88c16a | 25 | struct regulator *vcc; |
922ae890 TV |
26 | |
27 | int data_lines; | |
28 | ||
29 | struct omap_video_timings videomode; | |
30 | ||
9522f9fe TL |
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 */ | |
922ae890 TV |
36 | }; |
37 | ||
38 | static const struct omap_video_timings sharp_ls_timings = { | |
39 | .x_res = 480, | |
40 | .y_res = 640, | |
41 | ||
d8d78941 | 42 | .pixelclock = 19200000, |
922ae890 TV |
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, | |
7a16360d | 56 | .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE, |
922ae890 TV |
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 | ||
be88c16a TL |
100 | if (ddata->data_lines) |
101 | in->ops.dpi->set_data_lines(in, ddata->data_lines); | |
922ae890 TV |
102 | in->ops.dpi->set_timings(in, &ddata->videomode); |
103 | ||
be88c16a TL |
104 | if (ddata->vcc) { |
105 | r = regulator_enable(ddata->vcc); | |
106 | if (r != 0) | |
107 | return r; | |
108 | } | |
109 | ||
922ae890 | 110 | r = in->ops.dpi->enable(in); |
be88c16a TL |
111 | if (r) { |
112 | regulator_disable(ddata->vcc); | |
922ae890 | 113 | return r; |
be88c16a | 114 | } |
922ae890 TV |
115 | |
116 | /* wait couple of vsyncs until enabling the LCD */ | |
117 | msleep(50); | |
118 | ||
9522f9fe TL |
119 | if (ddata->resb_gpio) |
120 | gpiod_set_value_cansleep(ddata->resb_gpio, 1); | |
922ae890 | 121 | |
9522f9fe TL |
122 | if (ddata->ini_gpio) |
123 | gpiod_set_value_cansleep(ddata->ini_gpio, 1); | |
922ae890 TV |
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 | ||
9522f9fe TL |
138 | if (ddata->ini_gpio) |
139 | gpiod_set_value_cansleep(ddata->ini_gpio, 0); | |
922ae890 | 140 | |
9522f9fe TL |
141 | if (ddata->resb_gpio) |
142 | gpiod_set_value_cansleep(ddata->resb_gpio, 0); | |
922ae890 TV |
143 | |
144 | /* wait at least 5 vsyncs after disabling the LCD */ | |
145 | ||
146 | msleep(100); | |
147 | ||
148 | in->ops.dpi->disable(in); | |
149 | ||
be88c16a TL |
150 | if (ddata->vcc) |
151 | regulator_disable(ddata->vcc); | |
152 | ||
922ae890 TV |
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 | ||
be88c16a TL |
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; | |
be88c16a TL |
203 | |
204 | *gpiod = NULL; | |
205 | ||
ca8c67da | 206 | gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW); |
be88c16a | 207 | if (IS_ERR(gd)) |
ca8c67da | 208 | return PTR_ERR(gd); |
be88c16a TL |
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 | ||
922ae890 TV |
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 | ||
393c2698 | 275 | if (!pdev->dev.of_node) |
922ae890 | 276 | return -ENODEV; |
393c2698 TV |
277 | |
278 | r = sharp_ls_probe_of(pdev); | |
279 | if (r) | |
280 | return r; | |
922ae890 | 281 | |
922ae890 TV |
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: | |
922ae890 TV |
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 | ||
be88c16a TL |
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 | ||
922ae890 TV |
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", | |
be88c16a | 333 | .of_match_table = sharp_ls_of_match, |
422ccbd5 | 334 | .suppress_bind_attrs = true, |
922ae890 TV |
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"); |