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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 struct videomode vm;
28
29 struct gpio_desc *resb_gpio;
30 struct gpio_desc *ini_gpio;
31 struct gpio_desc *mo_gpio;
32 struct gpio_desc *lr_gpio;
33 struct gpio_desc *ud_gpio;
34};
35
36static const struct videomode sharp_ls_vm = {
37 .hactive = 480,
38 .vactive = 640,
39
40 .pixelclock = 19200000,
41
42 .hsync_len = 2,
43 .hfront_porch = 1,
44 .hback_porch = 28,
45
46 .vsync_len = 1,
47 .vfront_porch = 1,
48 .vback_porch = 1,
49
50 .flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
51 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_NEGEDGE |
52 DISPLAY_FLAGS_PIXDATA_POSEDGE,
53
54
55
56
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 in->ops.dpi->set_timings(in, &ddata->vm);
101
102 if (ddata->vcc) {
103 r = regulator_enable(ddata->vcc);
104 if (r != 0)
105 return r;
106 }
107
108 r = in->ops.dpi->enable(in);
109 if (r) {
110 regulator_disable(ddata->vcc);
111 return r;
112 }
113
114
115 msleep(50);
116
117 if (ddata->resb_gpio)
118 gpiod_set_value_cansleep(ddata->resb_gpio, 1);
119
120 if (ddata->ini_gpio)
121 gpiod_set_value_cansleep(ddata->ini_gpio, 1);
122
123 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
124
125 return 0;
126}
127
128static void sharp_ls_disable(struct omap_dss_device *dssdev)
129{
130 struct panel_drv_data *ddata = to_panel_data(dssdev);
131 struct omap_dss_device *in = ddata->in;
132
133 if (!omapdss_device_is_enabled(dssdev))
134 return;
135
136 if (ddata->ini_gpio)
137 gpiod_set_value_cansleep(ddata->ini_gpio, 0);
138
139 if (ddata->resb_gpio)
140 gpiod_set_value_cansleep(ddata->resb_gpio, 0);
141
142
143
144 msleep(100);
145
146 in->ops.dpi->disable(in);
147
148 if (ddata->vcc)
149 regulator_disable(ddata->vcc);
150
151 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
152}
153
154static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
155 struct videomode *vm)
156{
157 struct panel_drv_data *ddata = to_panel_data(dssdev);
158 struct omap_dss_device *in = ddata->in;
159
160 ddata->vm = *vm;
161 dssdev->panel.vm = *vm;
162
163 in->ops.dpi->set_timings(in, vm);
164}
165
166static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
167 struct videomode *vm)
168{
169 struct panel_drv_data *ddata = to_panel_data(dssdev);
170
171 *vm = ddata->vm;
172}
173
174static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
175 struct videomode *vm)
176{
177 struct panel_drv_data *ddata = to_panel_data(dssdev);
178 struct omap_dss_device *in = ddata->in;
179
180 return in->ops.dpi->check_timings(in, vm);
181}
182
183static struct omap_dss_driver sharp_ls_ops = {
184 .connect = sharp_ls_connect,
185 .disconnect = sharp_ls_disconnect,
186
187 .enable = sharp_ls_enable,
188 .disable = sharp_ls_disable,
189
190 .set_timings = sharp_ls_set_timings,
191 .get_timings = sharp_ls_get_timings,
192 .check_timings = sharp_ls_check_timings,
193};
194
195static int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
196 const char *desc, struct gpio_desc **gpiod)
197{
198 struct gpio_desc *gd;
199
200 *gpiod = NULL;
201
202 gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
203 if (IS_ERR(gd))
204 return PTR_ERR(gd);
205
206 *gpiod = gd;
207 return 0;
208}
209
210static int sharp_ls_probe_of(struct platform_device *pdev)
211{
212 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
213 struct device_node *node = pdev->dev.of_node;
214 struct omap_dss_device *in;
215 int r;
216
217 ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
218 if (IS_ERR(ddata->vcc)) {
219 dev_err(&pdev->dev, "failed to get regulator\n");
220 return PTR_ERR(ddata->vcc);
221 }
222
223
224 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
225 if (r)
226 return r;
227
228
229 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
230 if (r)
231 return r;
232
233
234 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
235 if (r)
236 return r;
237
238
239 r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
240 if (r)
241 return r;
242
243
244 r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio);
245 if (r)
246 return r;
247
248 in = omapdss_of_find_source_for_first_ep(node);
249 if (IS_ERR(in)) {
250 dev_err(&pdev->dev, "failed to find video source\n");
251 return PTR_ERR(in);
252 }
253
254 ddata->in = in;
255
256 return 0;
257}
258
259static int sharp_ls_probe(struct platform_device *pdev)
260{
261 struct panel_drv_data *ddata;
262 struct omap_dss_device *dssdev;
263 int r;
264
265 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
266 if (ddata == NULL)
267 return -ENOMEM;
268
269 platform_set_drvdata(pdev, ddata);
270
271 if (!pdev->dev.of_node)
272 return -ENODEV;
273
274 r = sharp_ls_probe_of(pdev);
275 if (r)
276 return r;
277
278 ddata->vm = sharp_ls_vm;
279
280 dssdev = &ddata->dssdev;
281 dssdev->dev = &pdev->dev;
282 dssdev->driver = &sharp_ls_ops;
283 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
284 dssdev->owner = THIS_MODULE;
285 dssdev->panel.vm = ddata->vm;
286
287 r = omapdss_register_display(dssdev);
288 if (r) {
289 dev_err(&pdev->dev, "Failed to register panel\n");
290 goto err_reg;
291 }
292
293 return 0;
294
295err_reg:
296 omap_dss_put_device(ddata->in);
297 return r;
298}
299
300static int __exit sharp_ls_remove(struct platform_device *pdev)
301{
302 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
303 struct omap_dss_device *dssdev = &ddata->dssdev;
304 struct omap_dss_device *in = ddata->in;
305
306 omapdss_unregister_display(dssdev);
307
308 sharp_ls_disable(dssdev);
309 sharp_ls_disconnect(dssdev);
310
311 omap_dss_put_device(in);
312
313 return 0;
314}
315
316static const struct of_device_id sharp_ls_of_match[] = {
317 { .compatible = "omapdss,sharp,ls037v7dw01", },
318 {},
319};
320
321MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
322
323static struct platform_driver sharp_ls_driver = {
324 .probe = sharp_ls_probe,
325 .remove = __exit_p(sharp_ls_remove),
326 .driver = {
327 .name = "panel-sharp-ls037v7dw01",
328 .of_match_table = sharp_ls_of_match,
329 .suppress_bind_attrs = true,
330 },
331};
332
333module_platform_driver(sharp_ls_driver);
334
335MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
336MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
337MODULE_LICENSE("GPL");
338
