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19#include <linux/module.h>
20#include <linux/delay.h>
21#include <linux/spi/spi.h>
22#include <linux/fb.h>
23#include <linux/gpio.h>
24
25#include <video/omapdss.h>
26#include <video/omap-panel-data.h>
27
28#define LCD_XRES 800
29#define LCD_YRES 480
30
31
32
33
34#define LCD_PIXEL_CLOCK 23800
35
36static const struct {
37 unsigned char addr;
38 unsigned char dat;
39} nec_8048_init_seq[] = {
40 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
41 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
42 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
43 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
44 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
45 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
46 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
47 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
48 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
49 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
50 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
51 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
52 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
53 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
54 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
55 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
56 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
57 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
58};
59
60
61
62
63
64
65static struct omap_video_timings nec_8048_panel_timings = {
66
67 .x_res = LCD_XRES,
68 .y_res = LCD_YRES,
69 .pixel_clock = LCD_PIXEL_CLOCK,
70 .hfp = 6,
71 .hsw = 1,
72 .hbp = 4,
73 .vfp = 3,
74 .vsw = 1,
75 .vbp = 4,
76
77 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
78 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
79 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
80 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
81 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
82};
83
84static inline struct panel_nec_nl8048_data
85*get_panel_data(const struct omap_dss_device *dssdev)
86{
87 return (struct panel_nec_nl8048_data *) dssdev->data;
88}
89
90static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
91{
92 struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
93 int r;
94
95 if (!pd)
96 return -EINVAL;
97
98 dssdev->panel.timings = nec_8048_panel_timings;
99
100 if (gpio_is_valid(pd->qvga_gpio)) {
101 r = devm_gpio_request_one(&dssdev->dev, pd->qvga_gpio,
102 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
103 if (r)
104 return r;
105 }
106
107 if (gpio_is_valid(pd->res_gpio)) {
108 r = devm_gpio_request_one(&dssdev->dev, pd->res_gpio,
109 GPIOF_OUT_INIT_LOW, "lcd RES");
110 if (r)
111 return r;
112 }
113
114 return 0;
115}
116
117static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
118{
119}
120
121static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
122{
123 struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
124 int r;
125
126 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
127 return 0;
128
129 omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
130 omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
131
132 r = omapdss_dpi_display_enable(dssdev);
133 if (r)
134 goto err0;
135
136 if (gpio_is_valid(pd->res_gpio))
137 gpio_set_value_cansleep(pd->res_gpio, 1);
138
139 return 0;
140
141err0:
142 return r;
143}
144
145static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
146{
147 struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
148
149 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
150 return;
151
152 if (gpio_is_valid(pd->res_gpio))
153 gpio_set_value_cansleep(pd->res_gpio, 0);
154
155 omapdss_dpi_display_disable(dssdev);
156}
157
158static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
159{
160 int r;
161
162 r = nec_8048_panel_power_on(dssdev);
163 if (r)
164 return r;
165
166 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
167
168 return 0;
169}
170
171static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
172{
173 nec_8048_panel_power_off(dssdev);
174
175 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
176}
177
178static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
179{
180 return 16;
181}
182
183static struct omap_dss_driver nec_8048_driver = {
184 .probe = nec_8048_panel_probe,
185 .remove = nec_8048_panel_remove,
186 .enable = nec_8048_panel_enable,
187 .disable = nec_8048_panel_disable,
188 .get_recommended_bpp = nec_8048_recommended_bpp,
189
190 .driver = {
191 .name = "NEC_8048_panel",
192 .owner = THIS_MODULE,
193 },
194};
195
196static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
197 unsigned char reg_data)
198{
199 int ret = 0;
200 unsigned int cmd = 0, data = 0;
201
202 cmd = 0x0000 | reg_addr;
203 data = 0x0100 | reg_data ;
204 data = (cmd << 16) | data;
205
206 ret = spi_write(spi, (unsigned char *)&data, 4);
207 if (ret)
208 pr_err("error in spi_write %x\n", data);
209
210 return ret;
211}
212
213static int init_nec_8048_wvga_lcd(struct spi_device *spi)
214{
215 unsigned int i;
216
217
218 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
219 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
220 nec_8048_init_seq[i].dat);
221 udelay(20);
222 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
223 nec_8048_init_seq[i].dat);
224 return 0;
225}
226
227static int nec_8048_spi_probe(struct spi_device *spi)
228{
229 spi->mode = SPI_MODE_0;
230 spi->bits_per_word = 32;
231 spi_setup(spi);
232
233 init_nec_8048_wvga_lcd(spi);
234
235 return omap_dss_register_driver(&nec_8048_driver);
236}
237
238static int nec_8048_spi_remove(struct spi_device *spi)
239{
240 omap_dss_unregister_driver(&nec_8048_driver);
241
242 return 0;
243}
244
245#ifdef CONFIG_PM_SLEEP
246
247static int nec_8048_spi_suspend(struct device *dev)
248{
249 struct spi_device *spi = to_spi_device(dev);
250
251 nec_8048_spi_send(spi, 2, 0x01);
252 mdelay(40);
253
254 return 0;
255}
256
257static int nec_8048_spi_resume(struct device *dev)
258{
259 struct spi_device *spi = to_spi_device(dev);
260
261
262 spi_setup(spi);
263 nec_8048_spi_send(spi, 2, 0x00);
264 init_nec_8048_wvga_lcd(spi);
265
266 return 0;
267}
268
269static SIMPLE_DEV_PM_OPS(nec_8048_spi_pm_ops, nec_8048_spi_suspend,
270 nec_8048_spi_resume);
271#define NEC_8048_SPI_PM_OPS (&nec_8048_spi_pm_ops)
272#else
273#define NEC_8048_SPI_PM_OPS NULL
274#endif
275
276static struct spi_driver nec_8048_spi_driver = {
277 .probe = nec_8048_spi_probe,
278 .remove = nec_8048_spi_remove,
279 .driver = {
280 .name = "nec_8048_spi",
281 .owner = THIS_MODULE,
282 .pm = NEC_8048_SPI_PM_OPS,
283 },
284};
285
286module_spi_driver(nec_8048_spi_driver);
287
288MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
289MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
290MODULE_LICENSE("GPL");
291
