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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>
13#include <linux/gpio.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/of_gpio.h>
17#include <linux/platform_device.h>
18#include <linux/slab.h>
19#include <linux/regulator/consumer.h>
20#include <video/omapdss.h>
21
22struct panel_drv_data {
23 struct omap_dss_device dssdev;
24 struct omap_dss_device *in;
25 struct regulator *vcc;
26
27 int data_lines;
28
29 struct omap_video_timings videomode;
30
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 */
36};
37
38static const struct omap_video_timings sharp_ls_timings = {
39 .x_res = 480,
40 .y_res = 640,
41
42 .pixelclock = 19200000,
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,
56 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
57};
58
59#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
60
61static 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
77static 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
88static 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
100 if (ddata->data_lines)
101 in->ops.dpi->set_data_lines(in, ddata->data_lines);
102 in->ops.dpi->set_timings(in, &ddata->videomode);
103
104 if (ddata->vcc) {
105 r = regulator_enable(ddata->vcc);
106 if (r != 0)
107 return r;
108 }
109
110 r = in->ops.dpi->enable(in);
111 if (r) {
112 regulator_disable(ddata->vcc);
113 return r;
114 }
115
116 /* wait couple of vsyncs until enabling the LCD */
117 msleep(50);
118
119 if (ddata->resb_gpio)
120 gpiod_set_value_cansleep(ddata->resb_gpio, 1);
121
122 if (ddata->ini_gpio)
123 gpiod_set_value_cansleep(ddata->ini_gpio, 1);
124
125 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
126
127 return 0;
128}
129
130static 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
138 if (ddata->ini_gpio)
139 gpiod_set_value_cansleep(ddata->ini_gpio, 0);
140
141 if (ddata->resb_gpio)
142 gpiod_set_value_cansleep(ddata->resb_gpio, 0);
143
144 /* wait at least 5 vsyncs after disabling the LCD */
145
146 msleep(100);
147
148 in->ops.dpi->disable(in);
149
150 if (ddata->vcc)
151 regulator_disable(ddata->vcc);
152
153 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
154}
155
156static 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
168static 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
176static 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
185static 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
199static 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;
203
204 *gpiod = NULL;
205
206 gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
207 if (IS_ERR(gd))
208 return PTR_ERR(gd);
209
210 *gpiod = gd;
211 return 0;
212}
213
214static 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
263static 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
275 if (!pdev->dev.of_node)
276 return -ENODEV;
277
278 r = sharp_ls_probe_of(pdev);
279 if (r)
280 return r;
281
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
300err_reg:
301 omap_dss_put_device(ddata->in);
302 return r;
303}
304
305static 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
321static const struct of_device_id sharp_ls_of_match[] = {
322 { .compatible = "omapdss,sharp,ls037v7dw01", },
323 {},
324};
325
326MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
327
328static 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",
333 .of_match_table = sharp_ls_of_match,
334 .suppress_bind_attrs = true,
335 },
336};
337
338module_platform_driver(sharp_ls_driver);
339
340MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
341MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
342MODULE_LICENSE("GPL");
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>
13#include <linux/gpio/consumer.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/platform_device.h>
17#include <linux/slab.h>
18#include <linux/regulator/consumer.h>
19
20#include "../dss/omapdss.h"
21
22struct panel_drv_data {
23 struct omap_dss_device dssdev;
24 struct omap_dss_device *in;
25 struct regulator *vcc;
26
27 int data_lines;
28
29 struct videomode vm;
30
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 */
36};
37
38static const struct videomode sharp_ls_vm = {
39 .hactive = 480,
40 .vactive = 640,
41
42 .pixelclock = 19200000,
43
44 .hsync_len = 2,
45 .hfront_porch = 1,
46 .hback_porch = 28,
47
48 .vsync_len = 1,
49 .vfront_porch = 1,
50 .vback_porch = 1,
51
52 .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
53 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_NEGEDGE |
54 DISPLAY_FLAGS_PIXDATA_POSEDGE,
55 /*
56 * Note: According to the panel documentation:
57 * DATA needs to be driven on the FALLING edge
58 */
59};
60
61#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
62
63static int sharp_ls_connect(struct omap_dss_device *dssdev)
64{
65 struct panel_drv_data *ddata = to_panel_data(dssdev);
66 struct omap_dss_device *in = ddata->in;
67 int r;
68
69 if (omapdss_device_is_connected(dssdev))
70 return 0;
71
72 r = in->ops.dpi->connect(in, dssdev);
73 if (r)
74 return r;
75
76 return 0;
77}
78
79static void sharp_ls_disconnect(struct omap_dss_device *dssdev)
80{
81 struct panel_drv_data *ddata = to_panel_data(dssdev);
82 struct omap_dss_device *in = ddata->in;
83
84 if (!omapdss_device_is_connected(dssdev))
85 return;
86
87 in->ops.dpi->disconnect(in, dssdev);
88}
89
90static int sharp_ls_enable(struct omap_dss_device *dssdev)
91{
92 struct panel_drv_data *ddata = to_panel_data(dssdev);
93 struct omap_dss_device *in = ddata->in;
94 int r;
95
96 if (!omapdss_device_is_connected(dssdev))
97 return -ENODEV;
98
99 if (omapdss_device_is_enabled(dssdev))
100 return 0;
101
102 if (ddata->data_lines)
103 in->ops.dpi->set_data_lines(in, ddata->data_lines);
104 in->ops.dpi->set_timings(in, &ddata->vm);
105
106 if (ddata->vcc) {
107 r = regulator_enable(ddata->vcc);
108 if (r != 0)
109 return r;
110 }
111
112 r = in->ops.dpi->enable(in);
113 if (r) {
114 regulator_disable(ddata->vcc);
115 return r;
116 }
117
118 /* wait couple of vsyncs until enabling the LCD */
119 msleep(50);
120
121 if (ddata->resb_gpio)
122 gpiod_set_value_cansleep(ddata->resb_gpio, 1);
123
124 if (ddata->ini_gpio)
125 gpiod_set_value_cansleep(ddata->ini_gpio, 1);
126
127 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
128
129 return 0;
130}
131
132static void sharp_ls_disable(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_enabled(dssdev))
138 return;
139
140 if (ddata->ini_gpio)
141 gpiod_set_value_cansleep(ddata->ini_gpio, 0);
142
143 if (ddata->resb_gpio)
144 gpiod_set_value_cansleep(ddata->resb_gpio, 0);
145
146 /* wait at least 5 vsyncs after disabling the LCD */
147
148 msleep(100);
149
150 in->ops.dpi->disable(in);
151
152 if (ddata->vcc)
153 regulator_disable(ddata->vcc);
154
155 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
156}
157
158static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
159 struct videomode *vm)
160{
161 struct panel_drv_data *ddata = to_panel_data(dssdev);
162 struct omap_dss_device *in = ddata->in;
163
164 ddata->vm = *vm;
165 dssdev->panel.vm = *vm;
166
167 in->ops.dpi->set_timings(in, vm);
168}
169
170static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
171 struct videomode *vm)
172{
173 struct panel_drv_data *ddata = to_panel_data(dssdev);
174
175 *vm = ddata->vm;
176}
177
178static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
179 struct videomode *vm)
180{
181 struct panel_drv_data *ddata = to_panel_data(dssdev);
182 struct omap_dss_device *in = ddata->in;
183
184 return in->ops.dpi->check_timings(in, vm);
185}
186
187static struct omap_dss_driver sharp_ls_ops = {
188 .connect = sharp_ls_connect,
189 .disconnect = sharp_ls_disconnect,
190
191 .enable = sharp_ls_enable,
192 .disable = sharp_ls_disable,
193
194 .set_timings = sharp_ls_set_timings,
195 .get_timings = sharp_ls_get_timings,
196 .check_timings = sharp_ls_check_timings,
197
198 .get_resolution = omapdss_default_get_resolution,
199};
200
201static int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
202 const char *desc, struct gpio_desc **gpiod)
203{
204 struct gpio_desc *gd;
205
206 *gpiod = NULL;
207
208 gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
209 if (IS_ERR(gd))
210 return PTR_ERR(gd);
211
212 *gpiod = gd;
213 return 0;
214}
215
216static int sharp_ls_probe_of(struct platform_device *pdev)
217{
218 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
219 struct device_node *node = pdev->dev.of_node;
220 struct omap_dss_device *in;
221 int r;
222
223 ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
224 if (IS_ERR(ddata->vcc)) {
225 dev_err(&pdev->dev, "failed to get regulator\n");
226 return PTR_ERR(ddata->vcc);
227 }
228
229 /* lcd INI */
230 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
231 if (r)
232 return r;
233
234 /* lcd RESB */
235 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
236 if (r)
237 return r;
238
239 /* lcd MO */
240 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
241 if (r)
242 return r;
243
244 /* lcd LR */
245 r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
246 if (r)
247 return r;
248
249 /* lcd UD */
250 r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio);
251 if (r)
252 return r;
253
254 in = omapdss_of_find_source_for_first_ep(node);
255 if (IS_ERR(in)) {
256 dev_err(&pdev->dev, "failed to find video source\n");
257 return PTR_ERR(in);
258 }
259
260 ddata->in = in;
261
262 return 0;
263}
264
265static int sharp_ls_probe(struct platform_device *pdev)
266{
267 struct panel_drv_data *ddata;
268 struct omap_dss_device *dssdev;
269 int r;
270
271 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
272 if (ddata == NULL)
273 return -ENOMEM;
274
275 platform_set_drvdata(pdev, ddata);
276
277 if (!pdev->dev.of_node)
278 return -ENODEV;
279
280 r = sharp_ls_probe_of(pdev);
281 if (r)
282 return r;
283
284 ddata->vm = sharp_ls_vm;
285
286 dssdev = &ddata->dssdev;
287 dssdev->dev = &pdev->dev;
288 dssdev->driver = &sharp_ls_ops;
289 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
290 dssdev->owner = THIS_MODULE;
291 dssdev->panel.vm = ddata->vm;
292 dssdev->phy.dpi.data_lines = ddata->data_lines;
293
294 r = omapdss_register_display(dssdev);
295 if (r) {
296 dev_err(&pdev->dev, "Failed to register panel\n");
297 goto err_reg;
298 }
299
300 return 0;
301
302err_reg:
303 omap_dss_put_device(ddata->in);
304 return r;
305}
306
307static int __exit sharp_ls_remove(struct platform_device *pdev)
308{
309 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
310 struct omap_dss_device *dssdev = &ddata->dssdev;
311 struct omap_dss_device *in = ddata->in;
312
313 omapdss_unregister_display(dssdev);
314
315 sharp_ls_disable(dssdev);
316 sharp_ls_disconnect(dssdev);
317
318 omap_dss_put_device(in);
319
320 return 0;
321}
322
323static const struct of_device_id sharp_ls_of_match[] = {
324 { .compatible = "omapdss,sharp,ls037v7dw01", },
325 {},
326};
327
328MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
329
330static struct platform_driver sharp_ls_driver = {
331 .probe = sharp_ls_probe,
332 .remove = __exit_p(sharp_ls_remove),
333 .driver = {
334 .name = "panel-sharp-ls037v7dw01",
335 .of_match_table = sharp_ls_of_match,
336 .suppress_bind_attrs = true,
337 },
338};
339
340module_platform_driver(sharp_ls_driver);
341
342MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
343MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
344MODULE_LICENSE("GPL");