This source file includes following definitions.
- tosa_tg_send
- tosa_bl_enable
- tosa_lcd_tg_init
- tosa_lcd_tg_on
- tosa_lcd_tg_off
- tosa_lcd_set_power
- tosa_lcd_get_power
- tosa_lcd_set_mode
- tosa_lcd_probe
- tosa_lcd_remove
- tosa_lcd_suspend
- tosa_lcd_resume
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9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/device.h>
12 #include <linux/spi/spi.h>
13 #include <linux/i2c.h>
14 #include <linux/slab.h>
15 #include <linux/gpio.h>
16 #include <linux/delay.h>
17 #include <linux/lcd.h>
18 #include <linux/fb.h>
19
20 #include <asm/mach/sharpsl_param.h>
21
22 #include <mach/tosa.h>
23
24 #define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
25
26 #define TG_REG0_VQV 0x0001
27 #define TG_REG0_COLOR 0x0002
28 #define TG_REG0_UD 0x0004
29 #define TG_REG0_LR 0x0008
30
31 #define DAC_BASE 0x4e
32
33 struct tosa_lcd_data {
34 struct spi_device *spi;
35 struct lcd_device *lcd;
36 struct i2c_client *i2c;
37
38 int lcd_power;
39 bool is_vga;
40 };
41
42 static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data)
43 {
44 u8 buf[1];
45 struct spi_message msg;
46 struct spi_transfer xfer = {
47 .len = 1,
48 .cs_change = 0,
49 .tx_buf = buf,
50 };
51
52 buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);
53 spi_message_init(&msg);
54 spi_message_add_tail(&xfer, &msg);
55
56 return spi_sync(spi, &msg);
57 }
58
59 int tosa_bl_enable(struct spi_device *spi, int enable)
60 {
61
62 return tosa_tg_send(spi, TG_GPODR2, enable ? 0x01 : 0x00);
63 }
64 EXPORT_SYMBOL(tosa_bl_enable);
65
66 static void tosa_lcd_tg_init(struct tosa_lcd_data *data)
67 {
68
69 gpio_set_value(TOSA_GPIO_TG_ON, 0);
70
71 mdelay(60);
72
73
74 tosa_tg_send(data->spi, TG_TPOSCTL, 0x00);
75
76 tosa_tg_send(data->spi, TG_GPOSR, 0x02);
77 }
78
79 static void tosa_lcd_tg_on(struct tosa_lcd_data *data)
80 {
81 struct spi_device *spi = data->spi;
82 int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
83
84 if (data->is_vga)
85 value |= TG_REG0_VQV;
86
87 tosa_tg_send(spi, TG_PNLCTL, value);
88
89
90 tosa_tg_send(spi, TG_PINICTL, 0x4);
91 mdelay(50);
92
93
94 tosa_tg_send(spi, TG_PINICTL, 0x0);
95
96 if (!data->i2c) {
97
98
99
100
101 struct i2c_adapter *adap = i2c_get_adapter(0);
102 struct i2c_board_info info = {
103 .type = "tosa-bl",
104 .addr = DAC_BASE,
105 .platform_data = data->spi,
106 };
107 data->i2c = i2c_new_device(adap, &info);
108 }
109 }
110
111 static void tosa_lcd_tg_off(struct tosa_lcd_data *data)
112 {
113 struct spi_device *spi = data->spi;
114
115
116 tosa_tg_send(spi, TG_PINICTL, 0x4);
117 mdelay(50);
118
119
120 tosa_tg_send(spi, TG_PINICTL, 0x6);
121 mdelay(50);
122
123
124 gpio_set_value(TOSA_GPIO_TG_ON, 1);
125 mdelay(100);
126 }
127
128 int tosa_lcd_set_power(struct lcd_device *lcd, int power)
129 {
130 struct tosa_lcd_data *data = lcd_get_data(lcd);
131
132 if (POWER_IS_ON(power) && !POWER_IS_ON(data->lcd_power))
133 tosa_lcd_tg_on(data);
134
135 if (!POWER_IS_ON(power) && POWER_IS_ON(data->lcd_power))
136 tosa_lcd_tg_off(data);
137
138 data->lcd_power = power;
139 return 0;
140 }
141
142 static int tosa_lcd_get_power(struct lcd_device *lcd)
143 {
144 struct tosa_lcd_data *data = lcd_get_data(lcd);
145
146 return data->lcd_power;
147 }
148
149 static int tosa_lcd_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
150 {
151 struct tosa_lcd_data *data = lcd_get_data(lcd);
152
153 if (mode->xres == 320 || mode->yres == 320)
154 data->is_vga = false;
155 else
156 data->is_vga = true;
157
158 if (POWER_IS_ON(data->lcd_power))
159 tosa_lcd_tg_on(data);
160
161 return 0;
162 }
163
164 static struct lcd_ops tosa_lcd_ops = {
165 .set_power = tosa_lcd_set_power,
166 .get_power = tosa_lcd_get_power,
167 .set_mode = tosa_lcd_set_mode,
168 };
169
170 static int tosa_lcd_probe(struct spi_device *spi)
171 {
172 int ret;
173 struct tosa_lcd_data *data;
174
175 data = devm_kzalloc(&spi->dev, sizeof(struct tosa_lcd_data),
176 GFP_KERNEL);
177 if (!data)
178 return -ENOMEM;
179
180 data->is_vga = true;
181
182
183
184
185 spi->bits_per_word = 8;
186
187 ret = spi_setup(spi);
188 if (ret < 0)
189 return ret;
190
191 data->spi = spi;
192 spi_set_drvdata(spi, data);
193
194 ret = devm_gpio_request_one(&spi->dev, TOSA_GPIO_TG_ON,
195 GPIOF_OUT_INIT_LOW, "tg #pwr");
196 if (ret < 0)
197 return ret;
198
199 mdelay(60);
200
201 tosa_lcd_tg_init(data);
202
203 tosa_lcd_tg_on(data);
204
205 data->lcd = devm_lcd_device_register(&spi->dev, "tosa-lcd", &spi->dev,
206 data, &tosa_lcd_ops);
207
208 if (IS_ERR(data->lcd)) {
209 ret = PTR_ERR(data->lcd);
210 data->lcd = NULL;
211 goto err_register;
212 }
213
214 return 0;
215
216 err_register:
217 tosa_lcd_tg_off(data);
218 return ret;
219 }
220
221 static int tosa_lcd_remove(struct spi_device *spi)
222 {
223 struct tosa_lcd_data *data = spi_get_drvdata(spi);
224
225 i2c_unregister_device(data->i2c);
226
227 tosa_lcd_tg_off(data);
228
229 return 0;
230 }
231
232 #ifdef CONFIG_PM_SLEEP
233 static int tosa_lcd_suspend(struct device *dev)
234 {
235 struct tosa_lcd_data *data = dev_get_drvdata(dev);
236
237 tosa_lcd_tg_off(data);
238
239 return 0;
240 }
241
242 static int tosa_lcd_resume(struct device *dev)
243 {
244 struct tosa_lcd_data *data = dev_get_drvdata(dev);
245
246 tosa_lcd_tg_init(data);
247 if (POWER_IS_ON(data->lcd_power))
248 tosa_lcd_tg_on(data);
249 else
250 tosa_lcd_tg_off(data);
251
252 return 0;
253 }
254 #endif
255
256 static SIMPLE_DEV_PM_OPS(tosa_lcd_pm_ops, tosa_lcd_suspend, tosa_lcd_resume);
257
258 static struct spi_driver tosa_lcd_driver = {
259 .driver = {
260 .name = "tosa-lcd",
261 .pm = &tosa_lcd_pm_ops,
262 },
263 .probe = tosa_lcd_probe,
264 .remove = tosa_lcd_remove,
265 };
266
267 module_spi_driver(tosa_lcd_driver);
268
269 MODULE_AUTHOR("Dmitry Baryshkov");
270 MODULE_LICENSE("GPL v2");
271 MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA");
272 MODULE_ALIAS("spi:tosa-lcd");