1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * NEC NL8048HL11 Panel driver
4 *
5 * Copyright (C) 2010 Texas Instruments Inc.
6 * Author: Erik Gilling <konkers@android.com>
7 * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
8 */
9
10 #include <linux/delay.h>
11 #include <linux/err.h>
12 #include <linux/fb.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/module.h>
15 #include <linux/spi/spi.h>
16
17 #include <video/omapfb_dss.h>
18
19 struct panel_drv_data {
20 struct omap_dss_device dssdev;
21 struct omap_dss_device *in;
22
23 struct omap_video_timings videomode;
24
25 int data_lines;
26
27 struct gpio_desc *res_gpio;
28
29 struct spi_device *spi;
30 };
31
32 #define LCD_XRES 800
33 #define LCD_YRES 480
34 /*
35 * NEC PIX Clock Ratings
36 * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
37 */
38 #define LCD_PIXEL_CLOCK 23800000
39
40 static const struct {
41 unsigned char addr;
42 unsigned char dat;
43 } nec_8048_init_seq[] = {
44 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
45 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
46 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
47 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
48 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
49 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
50 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
51 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
52 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
53 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
54 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
55 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
56 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
57 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
58 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
59 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
60 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
61 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
62 };
63
64 static const struct omap_video_timings nec_8048_panel_timings = {
65 .x_res = LCD_XRES,
66 .y_res = LCD_YRES,
67 .pixelclock = LCD_PIXEL_CLOCK,
68 .hfp = 6,
69 .hsw = 1,
70 .hbp = 4,
71 .vfp = 3,
72 .vsw = 1,
73 .vbp = 4,
74
75 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
76 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
77 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
78 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
79 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
80 };
81
82 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
83
nec_8048_spi_send(struct spi_device * spi,unsigned char reg_addr,unsigned char reg_data)84 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
85 unsigned char reg_data)
86 {
87 int ret = 0;
88 unsigned int cmd = 0, data = 0;
89
90 cmd = 0x0000 | reg_addr; /* register address write */
91 data = 0x0100 | reg_data; /* register data write */
92 data = (cmd << 16) | data;
93
94 ret = spi_write(spi, (unsigned char *)&data, 4);
95 if (ret)
96 pr_err("error in spi_write %x\n", data);
97
98 return ret;
99 }
100
init_nec_8048_wvga_lcd(struct spi_device * spi)101 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
102 {
103 unsigned int i;
104 /* Initialization Sequence */
105 /* nec_8048_spi_send(spi, REG, VAL) */
106 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
107 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
108 nec_8048_init_seq[i].dat);
109 udelay(20);
110 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
111 nec_8048_init_seq[i].dat);
112 return 0;
113 }
114
nec_8048_connect(struct omap_dss_device * dssdev)115 static int nec_8048_connect(struct omap_dss_device *dssdev)
116 {
117 struct panel_drv_data *ddata = to_panel_data(dssdev);
118 struct omap_dss_device *in = ddata->in;
119
120 if (omapdss_device_is_connected(dssdev))
121 return 0;
122
123 return in->ops.dpi->connect(in, dssdev);
124 }
125
nec_8048_disconnect(struct omap_dss_device * dssdev)126 static void nec_8048_disconnect(struct omap_dss_device *dssdev)
127 {
128 struct panel_drv_data *ddata = to_panel_data(dssdev);
129 struct omap_dss_device *in = ddata->in;
130
131 if (!omapdss_device_is_connected(dssdev))
132 return;
133
134 in->ops.dpi->disconnect(in, dssdev);
135 }
136
nec_8048_enable(struct omap_dss_device * dssdev)137 static int nec_8048_enable(struct omap_dss_device *dssdev)
138 {
139 struct panel_drv_data *ddata = to_panel_data(dssdev);
140 struct omap_dss_device *in = ddata->in;
141 int r;
142
143 if (!omapdss_device_is_connected(dssdev))
144 return -ENODEV;
145
146 if (omapdss_device_is_enabled(dssdev))
147 return 0;
148
149 if (ddata->data_lines)
150 in->ops.dpi->set_data_lines(in, ddata->data_lines);
151 in->ops.dpi->set_timings(in, &ddata->videomode);
152
153 r = in->ops.dpi->enable(in);
154 if (r)
155 return r;
156
157 /* Apparently existing DTSes use incorrect polarity (active high) */
158 gpiod_set_value_cansleep(ddata->res_gpio, 1);
159
160 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
161
162 return 0;
163 }
164
nec_8048_disable(struct omap_dss_device * dssdev)165 static void nec_8048_disable(struct omap_dss_device *dssdev)
166 {
167 struct panel_drv_data *ddata = to_panel_data(dssdev);
168 struct omap_dss_device *in = ddata->in;
169
170 if (!omapdss_device_is_enabled(dssdev))
171 return;
172
173 /* Apparently existing DTSes use incorrect polarity (active high) */
174 gpiod_set_value_cansleep(ddata->res_gpio, 0);
175
176 in->ops.dpi->disable(in);
177
178 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
179 }
180
nec_8048_set_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)181 static void nec_8048_set_timings(struct omap_dss_device *dssdev,
182 struct omap_video_timings *timings)
183 {
184 struct panel_drv_data *ddata = to_panel_data(dssdev);
185 struct omap_dss_device *in = ddata->in;
186
187 ddata->videomode = *timings;
188 dssdev->panel.timings = *timings;
189
190 in->ops.dpi->set_timings(in, timings);
191 }
192
nec_8048_get_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)193 static void nec_8048_get_timings(struct omap_dss_device *dssdev,
194 struct omap_video_timings *timings)
195 {
196 struct panel_drv_data *ddata = to_panel_data(dssdev);
197
198 *timings = ddata->videomode;
199 }
200
nec_8048_check_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)201 static int nec_8048_check_timings(struct omap_dss_device *dssdev,
202 struct omap_video_timings *timings)
203 {
204 struct panel_drv_data *ddata = to_panel_data(dssdev);
205 struct omap_dss_device *in = ddata->in;
206
207 return in->ops.dpi->check_timings(in, timings);
208 }
209
210 static struct omap_dss_driver nec_8048_ops = {
211 .connect = nec_8048_connect,
212 .disconnect = nec_8048_disconnect,
213
214 .enable = nec_8048_enable,
215 .disable = nec_8048_disable,
216
217 .set_timings = nec_8048_set_timings,
218 .get_timings = nec_8048_get_timings,
219 .check_timings = nec_8048_check_timings,
220
221 .get_resolution = omapdss_default_get_resolution,
222 };
223
nec_8048_probe(struct spi_device * spi)224 static int nec_8048_probe(struct spi_device *spi)
225 {
226 struct panel_drv_data *ddata;
227 struct omap_dss_device *dssdev;
228 int r;
229
230 dev_dbg(&spi->dev, "%s\n", __func__);
231
232 if (!spi->dev.of_node)
233 return -ENODEV;
234
235 spi->mode = SPI_MODE_0;
236 spi->bits_per_word = 32;
237
238 r = spi_setup(spi);
239 if (r < 0) {
240 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
241 return r;
242 }
243
244 init_nec_8048_wvga_lcd(spi);
245
246 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
247 if (ddata == NULL)
248 return -ENOMEM;
249
250 dev_set_drvdata(&spi->dev, ddata);
251
252 ddata->spi = spi;
253
254 ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node);
255 r = PTR_ERR_OR_ZERO(ddata->in);
256 if (r) {
257 dev_err(&spi->dev, "failed to find video source: %d\n", r);
258 return r;
259 }
260
261 ddata->res_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
262 r = PTR_ERR_OR_ZERO(ddata->res_gpio);
263 if (r) {
264 dev_err(&spi->dev, "failed to request reset gpio: %d\n", r);
265 goto err_gpio;
266 }
267
268 gpiod_set_consumer_name(ddata->res_gpio, "lcd RES");
269
270 ddata->videomode = nec_8048_panel_timings;
271
272 dssdev = &ddata->dssdev;
273 dssdev->dev = &spi->dev;
274 dssdev->driver = &nec_8048_ops;
275 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
276 dssdev->owner = THIS_MODULE;
277 dssdev->panel.timings = ddata->videomode;
278
279 r = omapdss_register_display(dssdev);
280 if (r) {
281 dev_err(&spi->dev, "Failed to register panel\n");
282 goto err_reg;
283 }
284
285 return 0;
286
287 err_reg:
288 err_gpio:
289 omap_dss_put_device(ddata->in);
290 return r;
291 }
292
nec_8048_remove(struct spi_device * spi)293 static void nec_8048_remove(struct spi_device *spi)
294 {
295 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
296 struct omap_dss_device *dssdev = &ddata->dssdev;
297 struct omap_dss_device *in = ddata->in;
298
299 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
300
301 omapdss_unregister_display(dssdev);
302
303 nec_8048_disable(dssdev);
304 nec_8048_disconnect(dssdev);
305
306 omap_dss_put_device(in);
307 }
308
309 #ifdef CONFIG_PM_SLEEP
nec_8048_suspend(struct device * dev)310 static int nec_8048_suspend(struct device *dev)
311 {
312 struct spi_device *spi = to_spi_device(dev);
313
314 nec_8048_spi_send(spi, 2, 0x01);
315 mdelay(40);
316
317 return 0;
318 }
319
nec_8048_resume(struct device * dev)320 static int nec_8048_resume(struct device *dev)
321 {
322 struct spi_device *spi = to_spi_device(dev);
323
324 /* reinitialize the panel */
325 spi_setup(spi);
326 nec_8048_spi_send(spi, 2, 0x00);
327 init_nec_8048_wvga_lcd(spi);
328
329 return 0;
330 }
331 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
332 nec_8048_resume);
333 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
334 #else
335 #define NEC_8048_PM_OPS NULL
336 #endif
337
338 static const struct of_device_id nec_8048_of_match[] = {
339 { .compatible = "omapdss,nec,nl8048hl11", },
340 {},
341 };
342
343 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
344
345 static struct spi_driver nec_8048_driver = {
346 .driver = {
347 .name = "panel-nec-nl8048hl11",
348 .pm = NEC_8048_PM_OPS,
349 .of_match_table = nec_8048_of_match,
350 .suppress_bind_attrs = true,
351 },
352 .probe = nec_8048_probe,
353 .remove = nec_8048_remove,
354 };
355
356 module_spi_driver(nec_8048_driver);
357
358 MODULE_ALIAS("spi:nec,nl8048hl11");
359 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
360 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
361 MODULE_LICENSE("GPL");
362