1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* drivers/video/backlight/vgg2432a4.c |
3 | * |
4 | * VGG2432A4 (ILI9320) LCD controller driver. |
5 | * |
6 | * Copyright 2007 Simtec Electronics |
7 | * http://armlinux.simtec.co.uk/ |
8 | * Ben Dooks <ben@simtec.co.uk> |
9 | */ |
10 | |
11 | #include <linux/delay.h> |
12 | #include <linux/err.h> |
13 | #include <linux/fb.h> |
14 | #include <linux/init.h> |
15 | #include <linux/lcd.h> |
16 | #include <linux/module.h> |
17 | |
18 | #include <linux/spi/spi.h> |
19 | |
20 | #include <video/ili9320.h> |
21 | |
22 | #include "ili9320.h" |
23 | |
24 | /* Device initialisation sequences */ |
25 | |
26 | static const struct ili9320_reg vgg_init1[] = { |
27 | { |
28 | .address = ILI9320_POWER1, |
29 | .value = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0), |
30 | }, { |
31 | .address = ILI9320_POWER2, |
32 | .value = (ILI9320_POWER2_VC(7) | |
33 | ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)), |
34 | }, { |
35 | .address = ILI9320_POWER3, |
36 | .value = ILI9320_POWER3_VRH(0), |
37 | }, { |
38 | .address = ILI9320_POWER4, |
39 | .value = ILI9320_POWER4_VREOUT(0), |
40 | }, |
41 | }; |
42 | |
43 | static const struct ili9320_reg vgg_init2[] = { |
44 | { |
45 | .address = ILI9320_POWER1, |
46 | .value = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE | |
47 | ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP), |
48 | }, { |
49 | .address = ILI9320_POWER2, |
50 | .value = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3), |
51 | } |
52 | }; |
53 | |
54 | static const struct ili9320_reg vgg_gamma[] = { |
55 | { |
56 | .address = ILI9320_GAMMA1, |
57 | .value = 0x0000, |
58 | }, { |
59 | .address = ILI9320_GAMMA2, |
60 | .value = 0x0505, |
61 | }, { |
62 | .address = ILI9320_GAMMA3, |
63 | .value = 0x0004, |
64 | }, { |
65 | .address = ILI9320_GAMMA4, |
66 | .value = 0x0006, |
67 | }, { |
68 | .address = ILI9320_GAMMA5, |
69 | .value = 0x0707, |
70 | }, { |
71 | .address = ILI9320_GAMMA6, |
72 | .value = 0x0105, |
73 | }, { |
74 | .address = ILI9320_GAMMA7, |
75 | .value = 0x0002, |
76 | }, { |
77 | .address = ILI9320_GAMMA8, |
78 | .value = 0x0707, |
79 | }, { |
80 | .address = ILI9320_GAMMA9, |
81 | .value = 0x0704, |
82 | }, { |
83 | .address = ILI9320_GAMMA10, |
84 | .value = 0x807, |
85 | } |
86 | |
87 | }; |
88 | |
89 | static const struct ili9320_reg vgg_init0[] = { |
90 | [0] = { |
91 | /* set direction and scan mode gate */ |
92 | .address = ILI9320_DRIVER, |
93 | .value = ILI9320_DRIVER_SS, |
94 | }, { |
95 | .address = ILI9320_DRIVEWAVE, |
96 | .value = (ILI9320_DRIVEWAVE_MUSTSET | |
97 | ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC), |
98 | }, { |
99 | .address = ILI9320_ENTRYMODE, |
100 | .value = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR, |
101 | }, { |
102 | .address = ILI9320_RESIZING, |
103 | .value = 0x0, |
104 | }, |
105 | }; |
106 | |
107 | |
108 | static int vgg2432a4_lcd_init(struct ili9320 *lcd, |
109 | struct ili9320_platdata *cfg) |
110 | { |
111 | unsigned int addr; |
112 | int ret; |
113 | |
114 | /* Set VCore before anything else (VGG243237-6UFLWA) */ |
115 | ret = ili9320_write(ili: lcd, reg: 0x00e5, value: 0x8000); |
116 | if (ret) |
117 | goto err_initial; |
118 | |
119 | /* Start the oscillator up before we can do anything else. */ |
120 | ret = ili9320_write(ili: lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC); |
121 | if (ret) |
122 | goto err_initial; |
123 | |
124 | /* must wait at-lesat 10ms after starting */ |
125 | mdelay(15); |
126 | |
127 | ret = ili9320_write_regs(ili: lcd, values: vgg_init0, ARRAY_SIZE(vgg_init0)); |
128 | if (ret != 0) |
129 | goto err_initial; |
130 | |
131 | ili9320_write(ili: lcd, ILI9320_DISPLAY2, value: cfg->display2); |
132 | ili9320_write(ili: lcd, ILI9320_DISPLAY3, value: cfg->display3); |
133 | ili9320_write(ili: lcd, ILI9320_DISPLAY4, value: cfg->display4); |
134 | |
135 | ili9320_write(ili: lcd, ILI9320_RGB_IF1, value: cfg->rgb_if1); |
136 | ili9320_write(ili: lcd, ILI9320_FRAMEMAKER, value: 0x0); |
137 | ili9320_write(ili: lcd, ILI9320_RGB_IF2, value: cfg->rgb_if2); |
138 | |
139 | ret = ili9320_write_regs(ili: lcd, values: vgg_init1, ARRAY_SIZE(vgg_init1)); |
140 | if (ret != 0) |
141 | goto err_vgg; |
142 | |
143 | mdelay(300); |
144 | |
145 | ret = ili9320_write_regs(ili: lcd, values: vgg_init2, ARRAY_SIZE(vgg_init2)); |
146 | if (ret != 0) |
147 | goto err_vgg2; |
148 | |
149 | mdelay(100); |
150 | |
151 | ili9320_write(ili: lcd, ILI9320_POWER3, value: 0x13c); |
152 | |
153 | mdelay(100); |
154 | |
155 | ili9320_write(ili: lcd, ILI9320_POWER4, value: 0x1c00); |
156 | ili9320_write(ili: lcd, ILI9320_POWER7, value: 0x000e); |
157 | |
158 | mdelay(100); |
159 | |
160 | ili9320_write(ili: lcd, ILI9320_GRAM_HORIZ_ADDR, value: 0x00); |
161 | ili9320_write(ili: lcd, ILI9320_GRAM_VERT_ADD, value: 0x00); |
162 | |
163 | ret = ili9320_write_regs(ili: lcd, values: vgg_gamma, ARRAY_SIZE(vgg_gamma)); |
164 | if (ret != 0) |
165 | goto err_vgg3; |
166 | |
167 | ili9320_write(ili: lcd, ILI9320_HORIZ_START, value: 0x0); |
168 | ili9320_write(ili: lcd, ILI9320_HORIZ_END, value: cfg->hsize - 1); |
169 | ili9320_write(ili: lcd, ILI9320_VERT_START, value: 0x0); |
170 | ili9320_write(ili: lcd, ILI9320_VERT_END, value: cfg->vsize - 1); |
171 | |
172 | ili9320_write(ili: lcd, ILI9320_DRIVER2, |
173 | ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D)); |
174 | |
175 | ili9320_write(ili: lcd, ILI9320_BASE_IMAGE, value: 0x1); |
176 | ili9320_write(ili: lcd, ILI9320_VERT_SCROLL, value: 0x00); |
177 | |
178 | for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END; |
179 | addr++) { |
180 | ili9320_write(ili: lcd, reg: addr, value: 0x0); |
181 | } |
182 | |
183 | ili9320_write(ili: lcd, ILI9320_INTERFACE1, value: 0x10); |
184 | ili9320_write(ili: lcd, ILI9320_INTERFACE2, value: cfg->interface2); |
185 | ili9320_write(ili: lcd, ILI9320_INTERFACE3, value: cfg->interface3); |
186 | ili9320_write(ili: lcd, ILI9320_INTERFACE4, value: cfg->interface4); |
187 | ili9320_write(ili: lcd, ILI9320_INTERFACE5, value: cfg->interface5); |
188 | ili9320_write(ili: lcd, ILI9320_INTERFACE6, value: cfg->interface6); |
189 | |
190 | lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE | |
191 | ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE | |
192 | 0x40); |
193 | |
194 | ili9320_write(ili: lcd, ILI9320_DISPLAY1, value: lcd->display1); |
195 | |
196 | return 0; |
197 | |
198 | err_vgg3: |
199 | err_vgg2: |
200 | err_vgg: |
201 | err_initial: |
202 | return ret; |
203 | } |
204 | |
205 | #ifdef CONFIG_PM_SLEEP |
206 | static int vgg2432a4_suspend(struct device *dev) |
207 | { |
208 | return ili9320_suspend(lcd: dev_get_drvdata(dev)); |
209 | } |
210 | static int vgg2432a4_resume(struct device *dev) |
211 | { |
212 | return ili9320_resume(lcd: dev_get_drvdata(dev)); |
213 | } |
214 | #endif |
215 | |
216 | static struct ili9320_client vgg2432a4_client = { |
217 | .name = "VGG2432A4" , |
218 | .init = vgg2432a4_lcd_init, |
219 | }; |
220 | |
221 | /* Device probe */ |
222 | |
223 | static int vgg2432a4_probe(struct spi_device *spi) |
224 | { |
225 | int ret; |
226 | |
227 | ret = ili9320_probe_spi(spi, cli: &vgg2432a4_client); |
228 | if (ret != 0) { |
229 | dev_err(&spi->dev, "failed to initialise ili9320\n" ); |
230 | return ret; |
231 | } |
232 | |
233 | return 0; |
234 | } |
235 | |
236 | static void vgg2432a4_remove(struct spi_device *spi) |
237 | { |
238 | ili9320_remove(lcd: spi_get_drvdata(spi)); |
239 | } |
240 | |
241 | static void vgg2432a4_shutdown(struct spi_device *spi) |
242 | { |
243 | ili9320_shutdown(lcd: spi_get_drvdata(spi)); |
244 | } |
245 | |
246 | static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume); |
247 | |
248 | static struct spi_driver vgg2432a4_driver = { |
249 | .driver = { |
250 | .name = "VGG2432A4" , |
251 | .pm = &vgg2432a4_pm_ops, |
252 | }, |
253 | .probe = vgg2432a4_probe, |
254 | .remove = vgg2432a4_remove, |
255 | .shutdown = vgg2432a4_shutdown, |
256 | }; |
257 | |
258 | module_spi_driver(vgg2432a4_driver); |
259 | |
260 | MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>" ); |
261 | MODULE_DESCRIPTION("VGG2432A4 LCD Driver" ); |
262 | MODULE_LICENSE("GPL v2" ); |
263 | MODULE_ALIAS("spi:VGG2432A4" ); |
264 | |