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19#include <linux/module.h>
20#include <linux/delay.h>
21#include <linux/spi/spi.h>
22#include <linux/mutex.h>
23#include <linux/gpio.h>
24
25#include <video/omapdss.h>
26#include <video/omap-panel-data.h>
27
28struct lb035q02_data {
29 struct mutex lock;
30};
31
32static struct omap_video_timings lb035q02_timings = {
33 .x_res = 320,
34 .y_res = 240,
35
36 .pixel_clock = 6500,
37
38 .hsw = 2,
39 .hfp = 20,
40 .hbp = 68,
41
42 .vsw = 2,
43 .vfp = 4,
44 .vbp = 18,
45
46 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
47 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
48 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
49 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
50 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES,
51};
52
53static inline struct panel_generic_dpi_data
54*get_panel_data(const struct omap_dss_device *dssdev)
55{
56 return (struct panel_generic_dpi_data *) dssdev->data;
57}
58
59static int lb035q02_panel_power_on(struct omap_dss_device *dssdev)
60{
61 struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
62 int r, i;
63
64 if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
65 return 0;
66
67 omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
68 omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
69
70 r = omapdss_dpi_display_enable(dssdev);
71 if (r)
72 goto err0;
73
74 for (i = 0; i < panel_data->num_gpios; ++i) {
75 gpio_set_value_cansleep(panel_data->gpios[i],
76 panel_data->gpio_invert[i] ? 0 : 1);
77 }
78
79 return 0;
80
81err0:
82 return r;
83}
84
85static void lb035q02_panel_power_off(struct omap_dss_device *dssdev)
86{
87 struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
88 int i;
89
90 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
91 return;
92
93 for (i = panel_data->num_gpios - 1; i >= 0; --i) {
94 gpio_set_value_cansleep(panel_data->gpios[i],
95 panel_data->gpio_invert[i] ? 1 : 0);
96 }
97
98 omapdss_dpi_display_disable(dssdev);
99}
100
101static int lb035q02_panel_probe(struct omap_dss_device *dssdev)
102{
103 struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
104 struct lb035q02_data *ld;
105 int r, i;
106
107 if (!panel_data)
108 return -EINVAL;
109
110 dssdev->panel.timings = lb035q02_timings;
111
112 ld = devm_kzalloc(dssdev->dev, sizeof(*ld), GFP_KERNEL);
113 if (!ld)
114 return -ENOMEM;
115
116 for (i = 0; i < panel_data->num_gpios; ++i) {
117 r = devm_gpio_request_one(dssdev->dev, panel_data->gpios[i],
118 panel_data->gpio_invert[i] ?
119 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
120 "panel gpio");
121 if (r)
122 return r;
123 }
124
125 mutex_init(&ld->lock);
126 dev_set_drvdata(dssdev->dev, ld);
127
128 return 0;
129}
130
131static void lb035q02_panel_remove(struct omap_dss_device *dssdev)
132{
133}
134
135static int lb035q02_panel_enable(struct omap_dss_device *dssdev)
136{
137 struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
138 int r;
139
140 mutex_lock(&ld->lock);
141
142 r = lb035q02_panel_power_on(dssdev);
143 if (r)
144 goto err;
145 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
146
147 mutex_unlock(&ld->lock);
148 return 0;
149err:
150 mutex_unlock(&ld->lock);
151 return r;
152}
153
154static void lb035q02_panel_disable(struct omap_dss_device *dssdev)
155{
156 struct lb035q02_data *ld = dev_get_drvdata(dssdev->dev);
157
158 mutex_lock(&ld->lock);
159
160 lb035q02_panel_power_off(dssdev);
161 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
162
163 mutex_unlock(&ld->lock);
164}
165
166static struct omap_dss_driver lb035q02_driver = {
167 .probe = lb035q02_panel_probe,
168 .remove = lb035q02_panel_remove,
169
170 .enable = lb035q02_panel_enable,
171 .disable = lb035q02_panel_disable,
172
173 .driver = {
174 .name = "lgphilips_lb035q02_panel",
175 .owner = THIS_MODULE,
176 },
177};
178
179static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
180{
181 struct spi_message msg;
182 struct spi_transfer index_xfer = {
183 .len = 3,
184 .cs_change = 1,
185 };
186 struct spi_transfer value_xfer = {
187 .len = 3,
188 };
189 u8 buffer[16];
190
191 spi_message_init(&msg);
192
193
194 buffer[0] = 0x70;
195 buffer[1] = 0x00;
196 buffer[2] = reg & 0x7f;
197 index_xfer.tx_buf = buffer;
198 spi_message_add_tail(&index_xfer, &msg);
199
200
201 buffer[4] = 0x72;
202 buffer[5] = val >> 8;
203 buffer[6] = val;
204 value_xfer.tx_buf = buffer + 4;
205 spi_message_add_tail(&value_xfer, &msg);
206
207 return spi_sync(spi, &msg);
208}
209
210static void init_lb035q02_panel(struct spi_device *spi)
211{
212
213 lb035q02_write_reg(spi, 0x01, 0x6300);
214 lb035q02_write_reg(spi, 0x02, 0x0200);
215 lb035q02_write_reg(spi, 0x03, 0x0177);
216 lb035q02_write_reg(spi, 0x04, 0x04c7);
217 lb035q02_write_reg(spi, 0x05, 0xffc0);
218 lb035q02_write_reg(spi, 0x06, 0xe806);
219 lb035q02_write_reg(spi, 0x0a, 0x4008);
220 lb035q02_write_reg(spi, 0x0b, 0x0000);
221 lb035q02_write_reg(spi, 0x0d, 0x0030);
222 lb035q02_write_reg(spi, 0x0e, 0x2800);
223 lb035q02_write_reg(spi, 0x0f, 0x0000);
224 lb035q02_write_reg(spi, 0x16, 0x9f80);
225 lb035q02_write_reg(spi, 0x17, 0x0a0f);
226 lb035q02_write_reg(spi, 0x1e, 0x00c1);
227 lb035q02_write_reg(spi, 0x30, 0x0300);
228 lb035q02_write_reg(spi, 0x31, 0x0007);
229 lb035q02_write_reg(spi, 0x32, 0x0000);
230 lb035q02_write_reg(spi, 0x33, 0x0000);
231 lb035q02_write_reg(spi, 0x34, 0x0707);
232 lb035q02_write_reg(spi, 0x35, 0x0004);
233 lb035q02_write_reg(spi, 0x36, 0x0302);
234 lb035q02_write_reg(spi, 0x37, 0x0202);
235 lb035q02_write_reg(spi, 0x3a, 0x0a0d);
236 lb035q02_write_reg(spi, 0x3b, 0x0806);
237}
238
239static int lb035q02_panel_spi_probe(struct spi_device *spi)
240{
241 init_lb035q02_panel(spi);
242 return omap_dss_register_driver(&lb035q02_driver);
243}
244
245static int lb035q02_panel_spi_remove(struct spi_device *spi)
246{
247 omap_dss_unregister_driver(&lb035q02_driver);
248 return 0;
249}
250
251static struct spi_driver lb035q02_spi_driver = {
252 .driver = {
253 .name = "lgphilips_lb035q02_panel-spi",
254 .owner = THIS_MODULE,
255 },
256 .probe = lb035q02_panel_spi_probe,
257 .remove = lb035q02_panel_spi_remove,
258};
259
260module_spi_driver(lb035q02_spi_driver);
261
262MODULE_LICENSE("GPL");
263
