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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/omapfb_dss.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;
32 struct gpio_desc *ini_gpio;
33 struct gpio_desc *mo_gpio;
34 struct gpio_desc *lr_gpio;
35 struct gpio_desc *ud_gpio;
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
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
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
228 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
229 if (r)
230 return r;
231
232
233 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
234 if (r)
235 return r;
236
237
238 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
239 if (r)
240 return r;
241
242
243 r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
244 if (r)
245 return r;
246
247
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 if (!pdev->dev.of_node)
270 return -ENODEV;
271
272 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
273 if (ddata == NULL)
274 return -ENOMEM;
275
276 platform_set_drvdata(pdev, ddata);
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");
343
