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