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10#include <linux/module.h>
11#include <linux/delay.h>
12#include <linux/spi/spi.h>
13#include <linux/mutex.h>
14#include <linux/gpio.h>
15
16#include <video/omapfb_dss.h>
17
18static const struct omap_video_timings lb035q02_timings = {
19 .x_res = 320,
20 .y_res = 240,
21
22 .pixelclock = 6500000,
23
24 .hsw = 2,
25 .hfp = 20,
26 .hbp = 68,
27
28 .vsw = 2,
29 .vfp = 4,
30 .vbp = 18,
31
32 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
33 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
34 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
35 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
36 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
37};
38
39struct panel_drv_data {
40 struct omap_dss_device dssdev;
41 struct omap_dss_device *in;
42
43 struct spi_device *spi;
44
45 int data_lines;
46
47 struct omap_video_timings videomode;
48
49
50 int backlight_gpio;
51
52 struct gpio_desc *enable_gpio;
53};
54
55#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
56
57static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
58{
59 struct spi_message msg;
60 struct spi_transfer index_xfer = {
61 .len = 3,
62 .cs_change = 1,
63 };
64 struct spi_transfer value_xfer = {
65 .len = 3,
66 };
67 u8 buffer[16];
68
69 spi_message_init(&msg);
70
71
72 buffer[0] = 0x70;
73 buffer[1] = 0x00;
74 buffer[2] = reg & 0x7f;
75 index_xfer.tx_buf = buffer;
76 spi_message_add_tail(&index_xfer, &msg);
77
78
79 buffer[4] = 0x72;
80 buffer[5] = val >> 8;
81 buffer[6] = val;
82 value_xfer.tx_buf = buffer + 4;
83 spi_message_add_tail(&value_xfer, &msg);
84
85 return spi_sync(spi, &msg);
86}
87
88static void init_lb035q02_panel(struct spi_device *spi)
89{
90
91 lb035q02_write_reg(spi, 0x01, 0x6300);
92 lb035q02_write_reg(spi, 0x02, 0x0200);
93 lb035q02_write_reg(spi, 0x03, 0x0177);
94 lb035q02_write_reg(spi, 0x04, 0x04c7);
95 lb035q02_write_reg(spi, 0x05, 0xffc0);
96 lb035q02_write_reg(spi, 0x06, 0xe806);
97 lb035q02_write_reg(spi, 0x0a, 0x4008);
98 lb035q02_write_reg(spi, 0x0b, 0x0000);
99 lb035q02_write_reg(spi, 0x0d, 0x0030);
100 lb035q02_write_reg(spi, 0x0e, 0x2800);
101 lb035q02_write_reg(spi, 0x0f, 0x0000);
102 lb035q02_write_reg(spi, 0x16, 0x9f80);
103 lb035q02_write_reg(spi, 0x17, 0x0a0f);
104 lb035q02_write_reg(spi, 0x1e, 0x00c1);
105 lb035q02_write_reg(spi, 0x30, 0x0300);
106 lb035q02_write_reg(spi, 0x31, 0x0007);
107 lb035q02_write_reg(spi, 0x32, 0x0000);
108 lb035q02_write_reg(spi, 0x33, 0x0000);
109 lb035q02_write_reg(spi, 0x34, 0x0707);
110 lb035q02_write_reg(spi, 0x35, 0x0004);
111 lb035q02_write_reg(spi, 0x36, 0x0302);
112 lb035q02_write_reg(spi, 0x37, 0x0202);
113 lb035q02_write_reg(spi, 0x3a, 0x0a0d);
114 lb035q02_write_reg(spi, 0x3b, 0x0806);
115}
116
117static int lb035q02_connect(struct omap_dss_device *dssdev)
118{
119 struct panel_drv_data *ddata = to_panel_data(dssdev);
120 struct omap_dss_device *in = ddata->in;
121 int r;
122
123 if (omapdss_device_is_connected(dssdev))
124 return 0;
125
126 r = in->ops.dpi->connect(in, dssdev);
127 if (r)
128 return r;
129
130 init_lb035q02_panel(ddata->spi);
131
132 return 0;
133}
134
135static void lb035q02_disconnect(struct omap_dss_device *dssdev)
136{
137 struct panel_drv_data *ddata = to_panel_data(dssdev);
138 struct omap_dss_device *in = ddata->in;
139
140 if (!omapdss_device_is_connected(dssdev))
141 return;
142
143 in->ops.dpi->disconnect(in, dssdev);
144}
145
146static int lb035q02_enable(struct omap_dss_device *dssdev)
147{
148 struct panel_drv_data *ddata = to_panel_data(dssdev);
149 struct omap_dss_device *in = ddata->in;
150 int r;
151
152 if (!omapdss_device_is_connected(dssdev))
153 return -ENODEV;
154
155 if (omapdss_device_is_enabled(dssdev))
156 return 0;
157
158 if (ddata->data_lines)
159 in->ops.dpi->set_data_lines(in, ddata->data_lines);
160 in->ops.dpi->set_timings(in, &ddata->videomode);
161
162 r = in->ops.dpi->enable(in);
163 if (r)
164 return r;
165
166 if (ddata->enable_gpio)
167 gpiod_set_value_cansleep(ddata->enable_gpio, 1);
168
169 if (gpio_is_valid(ddata->backlight_gpio))
170 gpio_set_value_cansleep(ddata->backlight_gpio, 1);
171
172 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
173
174 return 0;
175}
176
177static void lb035q02_disable(struct omap_dss_device *dssdev)
178{
179 struct panel_drv_data *ddata = to_panel_data(dssdev);
180 struct omap_dss_device *in = ddata->in;
181
182 if (!omapdss_device_is_enabled(dssdev))
183 return;
184
185 if (ddata->enable_gpio)
186 gpiod_set_value_cansleep(ddata->enable_gpio, 0);
187
188 if (gpio_is_valid(ddata->backlight_gpio))
189 gpio_set_value_cansleep(ddata->backlight_gpio, 0);
190
191 in->ops.dpi->disable(in);
192
193 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
194}
195
196static void lb035q02_set_timings(struct omap_dss_device *dssdev,
197 struct omap_video_timings *timings)
198{
199 struct panel_drv_data *ddata = to_panel_data(dssdev);
200 struct omap_dss_device *in = ddata->in;
201
202 ddata->videomode = *timings;
203 dssdev->panel.timings = *timings;
204
205 in->ops.dpi->set_timings(in, timings);
206}
207
208static void lb035q02_get_timings(struct omap_dss_device *dssdev,
209 struct omap_video_timings *timings)
210{
211 struct panel_drv_data *ddata = to_panel_data(dssdev);
212
213 *timings = ddata->videomode;
214}
215
216static int lb035q02_check_timings(struct omap_dss_device *dssdev,
217 struct omap_video_timings *timings)
218{
219 struct panel_drv_data *ddata = to_panel_data(dssdev);
220 struct omap_dss_device *in = ddata->in;
221
222 return in->ops.dpi->check_timings(in, timings);
223}
224
225static struct omap_dss_driver lb035q02_ops = {
226 .connect = lb035q02_connect,
227 .disconnect = lb035q02_disconnect,
228
229 .enable = lb035q02_enable,
230 .disable = lb035q02_disable,
231
232 .set_timings = lb035q02_set_timings,
233 .get_timings = lb035q02_get_timings,
234 .check_timings = lb035q02_check_timings,
235
236 .get_resolution = omapdss_default_get_resolution,
237};
238
239static int lb035q02_probe_of(struct spi_device *spi)
240{
241 struct device_node *node = spi->dev.of_node;
242 struct panel_drv_data *ddata = spi_get_drvdata(spi);
243 struct omap_dss_device *in;
244 struct gpio_desc *gpio;
245
246 gpio = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);
247 if (IS_ERR(gpio)) {
248 dev_err(&spi->dev, "failed to parse enable gpio\n");
249 return PTR_ERR(gpio);
250 }
251
252 ddata->enable_gpio = gpio;
253
254 ddata->backlight_gpio = -ENOENT;
255
256 in = omapdss_of_find_source_for_first_ep(node);
257 if (IS_ERR(in)) {
258 dev_err(&spi->dev, "failed to find video source\n");
259 return PTR_ERR(in);
260 }
261
262 ddata->in = in;
263
264 return 0;
265}
266
267static int lb035q02_panel_spi_probe(struct spi_device *spi)
268{
269 struct panel_drv_data *ddata;
270 struct omap_dss_device *dssdev;
271 int r;
272
273 if (!spi->dev.of_node)
274 return -ENODEV;
275
276 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
277 if (ddata == NULL)
278 return -ENOMEM;
279
280 spi_set_drvdata(spi, ddata);
281
282 ddata->spi = spi;
283
284 r = lb035q02_probe_of(spi);
285 if (r)
286 return r;
287
288 if (gpio_is_valid(ddata->backlight_gpio)) {
289 r = devm_gpio_request_one(&spi->dev, ddata->backlight_gpio,
290 GPIOF_OUT_INIT_LOW, "panel backlight");
291 if (r)
292 goto err_gpio;
293 }
294
295 ddata->videomode = lb035q02_timings;
296
297 dssdev = &ddata->dssdev;
298 dssdev->dev = &spi->dev;
299 dssdev->driver = &lb035q02_ops;
300 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
301 dssdev->owner = THIS_MODULE;
302 dssdev->panel.timings = ddata->videomode;
303 dssdev->phy.dpi.data_lines = ddata->data_lines;
304
305 r = omapdss_register_display(dssdev);
306 if (r) {
307 dev_err(&spi->dev, "Failed to register panel\n");
308 goto err_reg;
309 }
310
311 return 0;
312
313err_reg:
314err_gpio:
315 omap_dss_put_device(ddata->in);
316 return r;
317}
318
319static int lb035q02_panel_spi_remove(struct spi_device *spi)
320{
321 struct panel_drv_data *ddata = spi_get_drvdata(spi);
322 struct omap_dss_device *dssdev = &ddata->dssdev;
323 struct omap_dss_device *in = ddata->in;
324
325 omapdss_unregister_display(dssdev);
326
327 lb035q02_disable(dssdev);
328 lb035q02_disconnect(dssdev);
329
330 omap_dss_put_device(in);
331
332 return 0;
333}
334
335static const struct of_device_id lb035q02_of_match[] = {
336 { .compatible = "omapdss,lgphilips,lb035q02", },
337 {},
338};
339
340MODULE_DEVICE_TABLE(of, lb035q02_of_match);
341
342static struct spi_driver lb035q02_spi_driver = {
343 .probe = lb035q02_panel_spi_probe,
344 .remove = lb035q02_panel_spi_remove,
345 .driver = {
346 .name = "panel_lgphilips_lb035q02",
347 .of_match_table = lb035q02_of_match,
348 .suppress_bind_attrs = true,
349 },
350};
351
352module_spi_driver(lb035q02_spi_driver);
353
354MODULE_ALIAS("spi:lgphilips,lb035q02");
355MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
356MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
357MODULE_LICENSE("GPL");
358
