Merge tag 'tegra-for-4.8-dt-bindings' of git://git.kernel.org/pub/scm/linux/kernel...
[cascardo/linux.git] / drivers / gpu / drm / omapdrm / displays / panel-nec-nl8048hl11.c
1 /*
2  * NEC NL8048HL11 Panel driver
3  *
4  * Copyright (C) 2010 Texas Instruments Inc.
5  * Author: Erik Gilling <konkers@android.com>
6  * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  */
13
14 #include <linux/module.h>
15 #include <linux/delay.h>
16 #include <linux/spi/spi.h>
17 #include <linux/fb.h>
18 #include <linux/gpio/consumer.h>
19 #include <linux/of_gpio.h>
20
21 #include <video/omapdss.h>
22
23 struct panel_drv_data {
24         struct omap_dss_device  dssdev;
25         struct omap_dss_device *in;
26
27         struct omap_video_timings videomode;
28
29         int data_lines;
30
31         int res_gpio;
32         int qvga_gpio;
33
34         struct spi_device *spi;
35 };
36
37 #define LCD_XRES                800
38 #define LCD_YRES                480
39 /*
40  * NEC PIX Clock Ratings
41  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
42  */
43 #define LCD_PIXEL_CLOCK         23800000
44
45 static const struct {
46         unsigned char addr;
47         unsigned char dat;
48 } nec_8048_init_seq[] = {
49         { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
50         { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
51         { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
52         { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
53         { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
54         { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
55         { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
56         { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
57         { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
58         { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
59         { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
60         { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
61         { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
62         { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
63         { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
64         { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
65         { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
66         { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
67 };
68
69 static const struct omap_video_timings nec_8048_panel_timings = {
70         .x_res          = LCD_XRES,
71         .y_res          = LCD_YRES,
72         .pixelclock     = LCD_PIXEL_CLOCK,
73         .hfp            = 6,
74         .hsw            = 1,
75         .hbp            = 4,
76         .vfp            = 3,
77         .vsw            = 1,
78         .vbp            = 4,
79
80         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
81         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
82         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
83         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
84         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
85 };
86
87 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
88
89 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
90                         unsigned char reg_data)
91 {
92         int ret = 0;
93         unsigned int cmd = 0, data = 0;
94
95         cmd = 0x0000 | reg_addr; /* register address write */
96         data = 0x0100 | reg_data; /* register data write */
97         data = (cmd << 16) | data;
98
99         ret = spi_write(spi, (unsigned char *)&data, 4);
100         if (ret)
101                 pr_err("error in spi_write %x\n", data);
102
103         return ret;
104 }
105
106 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
107 {
108         unsigned int i;
109         /* Initialization Sequence */
110         /* nec_8048_spi_send(spi, REG, VAL) */
111         for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
112                 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
113                                 nec_8048_init_seq[i].dat);
114         udelay(20);
115         nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
116                                 nec_8048_init_seq[i].dat);
117         return 0;
118 }
119
120 static int nec_8048_connect(struct omap_dss_device *dssdev)
121 {
122         struct panel_drv_data *ddata = to_panel_data(dssdev);
123         struct omap_dss_device *in = ddata->in;
124         int r;
125
126         if (omapdss_device_is_connected(dssdev))
127                 return 0;
128
129         r = in->ops.dpi->connect(in, dssdev);
130         if (r)
131                 return r;
132
133         return 0;
134 }
135
136 static void nec_8048_disconnect(struct omap_dss_device *dssdev)
137 {
138         struct panel_drv_data *ddata = to_panel_data(dssdev);
139         struct omap_dss_device *in = ddata->in;
140
141         if (!omapdss_device_is_connected(dssdev))
142                 return;
143
144         in->ops.dpi->disconnect(in, dssdev);
145 }
146
147 static int nec_8048_enable(struct omap_dss_device *dssdev)
148 {
149         struct panel_drv_data *ddata = to_panel_data(dssdev);
150         struct omap_dss_device *in = ddata->in;
151         int r;
152
153         if (!omapdss_device_is_connected(dssdev))
154                 return -ENODEV;
155
156         if (omapdss_device_is_enabled(dssdev))
157                 return 0;
158
159         if (ddata->data_lines)
160                 in->ops.dpi->set_data_lines(in, ddata->data_lines);
161         in->ops.dpi->set_timings(in, &ddata->videomode);
162
163         r = in->ops.dpi->enable(in);
164         if (r)
165                 return r;
166
167         if (gpio_is_valid(ddata->res_gpio))
168                 gpio_set_value_cansleep(ddata->res_gpio, 1);
169
170         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
171
172         return 0;
173 }
174
175 static void nec_8048_disable(struct omap_dss_device *dssdev)
176 {
177         struct panel_drv_data *ddata = to_panel_data(dssdev);
178         struct omap_dss_device *in = ddata->in;
179
180         if (!omapdss_device_is_enabled(dssdev))
181                 return;
182
183         if (gpio_is_valid(ddata->res_gpio))
184                 gpio_set_value_cansleep(ddata->res_gpio, 0);
185
186         in->ops.dpi->disable(in);
187
188         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
189 }
190
191 static void nec_8048_set_timings(struct omap_dss_device *dssdev,
192                 struct omap_video_timings *timings)
193 {
194         struct panel_drv_data *ddata = to_panel_data(dssdev);
195         struct omap_dss_device *in = ddata->in;
196
197         ddata->videomode = *timings;
198         dssdev->panel.timings = *timings;
199
200         in->ops.dpi->set_timings(in, timings);
201 }
202
203 static void nec_8048_get_timings(struct omap_dss_device *dssdev,
204                 struct omap_video_timings *timings)
205 {
206         struct panel_drv_data *ddata = to_panel_data(dssdev);
207
208         *timings = ddata->videomode;
209 }
210
211 static int nec_8048_check_timings(struct omap_dss_device *dssdev,
212                 struct omap_video_timings *timings)
213 {
214         struct panel_drv_data *ddata = to_panel_data(dssdev);
215         struct omap_dss_device *in = ddata->in;
216
217         return in->ops.dpi->check_timings(in, timings);
218 }
219
220 static struct omap_dss_driver nec_8048_ops = {
221         .connect        = nec_8048_connect,
222         .disconnect     = nec_8048_disconnect,
223
224         .enable         = nec_8048_enable,
225         .disable        = nec_8048_disable,
226
227         .set_timings    = nec_8048_set_timings,
228         .get_timings    = nec_8048_get_timings,
229         .check_timings  = nec_8048_check_timings,
230
231         .get_resolution = omapdss_default_get_resolution,
232 };
233
234 static int nec_8048_probe_of(struct spi_device *spi)
235 {
236         struct device_node *node = spi->dev.of_node;
237         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
238         struct omap_dss_device *in;
239         int gpio;
240
241         gpio = of_get_named_gpio(node, "reset-gpios", 0);
242         if (!gpio_is_valid(gpio)) {
243                 dev_err(&spi->dev, "failed to parse enable gpio\n");
244                 return gpio;
245         }
246         ddata->res_gpio = gpio;
247
248         /* XXX the panel spec doesn't mention any QVGA pin?? */
249         ddata->qvga_gpio = -ENOENT;
250
251         in = omapdss_of_find_source_for_first_ep(node);
252         if (IS_ERR(in)) {
253                 dev_err(&spi->dev, "failed to find video source\n");
254                 return PTR_ERR(in);
255         }
256
257         ddata->in = in;
258
259         return 0;
260 }
261
262 static int nec_8048_probe(struct spi_device *spi)
263 {
264         struct panel_drv_data *ddata;
265         struct omap_dss_device *dssdev;
266         int r;
267
268         dev_dbg(&spi->dev, "%s\n", __func__);
269
270         spi->mode = SPI_MODE_0;
271         spi->bits_per_word = 32;
272
273         r = spi_setup(spi);
274         if (r < 0) {
275                 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
276                 return r;
277         }
278
279         init_nec_8048_wvga_lcd(spi);
280
281         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
282         if (ddata == NULL)
283                 return -ENOMEM;
284
285         dev_set_drvdata(&spi->dev, ddata);
286
287         ddata->spi = spi;
288
289         if (!spi->dev.of_node)
290                 return -ENODEV;
291
292         r = nec_8048_probe_of(spi);
293         if (r)
294                 return r;
295
296         if (gpio_is_valid(ddata->qvga_gpio)) {
297                 r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio,
298                                 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
299                 if (r)
300                         goto err_gpio;
301         }
302
303         if (gpio_is_valid(ddata->res_gpio)) {
304                 r = devm_gpio_request_one(&spi->dev, ddata->res_gpio,
305                                 GPIOF_OUT_INIT_LOW, "lcd RES");
306                 if (r)
307                         goto err_gpio;
308         }
309
310         ddata->videomode = nec_8048_panel_timings;
311
312         dssdev = &ddata->dssdev;
313         dssdev->dev = &spi->dev;
314         dssdev->driver = &nec_8048_ops;
315         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
316         dssdev->owner = THIS_MODULE;
317         dssdev->panel.timings = ddata->videomode;
318
319         r = omapdss_register_display(dssdev);
320         if (r) {
321                 dev_err(&spi->dev, "Failed to register panel\n");
322                 goto err_reg;
323         }
324
325         return 0;
326
327 err_reg:
328 err_gpio:
329         omap_dss_put_device(ddata->in);
330         return r;
331 }
332
333 static int nec_8048_remove(struct spi_device *spi)
334 {
335         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
336         struct omap_dss_device *dssdev = &ddata->dssdev;
337         struct omap_dss_device *in = ddata->in;
338
339         dev_dbg(&ddata->spi->dev, "%s\n", __func__);
340
341         omapdss_unregister_display(dssdev);
342
343         nec_8048_disable(dssdev);
344         nec_8048_disconnect(dssdev);
345
346         omap_dss_put_device(in);
347
348         return 0;
349 }
350
351 #ifdef CONFIG_PM_SLEEP
352 static int nec_8048_suspend(struct device *dev)
353 {
354         struct spi_device *spi = to_spi_device(dev);
355
356         nec_8048_spi_send(spi, 2, 0x01);
357         mdelay(40);
358
359         return 0;
360 }
361
362 static int nec_8048_resume(struct device *dev)
363 {
364         struct spi_device *spi = to_spi_device(dev);
365
366         /* reinitialize the panel */
367         spi_setup(spi);
368         nec_8048_spi_send(spi, 2, 0x00);
369         init_nec_8048_wvga_lcd(spi);
370
371         return 0;
372 }
373 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
374                 nec_8048_resume);
375 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
376 #else
377 #define NEC_8048_PM_OPS NULL
378 #endif
379
380 static const struct of_device_id nec_8048_of_match[] = {
381         { .compatible = "omapdss,nec,nl8048hl11", },
382         {},
383 };
384
385 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
386
387 static struct spi_driver nec_8048_driver = {
388         .driver = {
389                 .name   = "panel-nec-nl8048hl11",
390                 .pm     = NEC_8048_PM_OPS,
391                 .of_match_table = nec_8048_of_match,
392                 .suppress_bind_attrs = true,
393         },
394         .probe  = nec_8048_probe,
395         .remove = nec_8048_remove,
396 };
397
398 module_spi_driver(nec_8048_driver);
399
400 MODULE_ALIAS("spi:nec,nl8048hl11");
401 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
402 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
403 MODULE_LICENSE("GPL");