1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2cccb6d3cSBen Dooks /* drivers/video/backlight/vgg2432a4.c
3cccb6d3cSBen Dooks *
4cccb6d3cSBen Dooks * VGG2432A4 (ILI9320) LCD controller driver.
5cccb6d3cSBen Dooks *
6cccb6d3cSBen Dooks * Copyright 2007 Simtec Electronics
7cccb6d3cSBen Dooks * http://armlinux.simtec.co.uk/
8cccb6d3cSBen Dooks * Ben Dooks <ben@simtec.co.uk>
9cccb6d3cSBen Dooks */
10cccb6d3cSBen Dooks
11cccb6d3cSBen Dooks #include <linux/delay.h>
12cccb6d3cSBen Dooks #include <linux/err.h>
13cccb6d3cSBen Dooks #include <linux/fb.h>
14cccb6d3cSBen Dooks #include <linux/init.h>
15cccb6d3cSBen Dooks #include <linux/lcd.h>
16cccb6d3cSBen Dooks #include <linux/module.h>
17cccb6d3cSBen Dooks
18cccb6d3cSBen Dooks #include <linux/spi/spi.h>
19cccb6d3cSBen Dooks
20cccb6d3cSBen Dooks #include <video/ili9320.h>
21cccb6d3cSBen Dooks
22cccb6d3cSBen Dooks #include "ili9320.h"
23cccb6d3cSBen Dooks
24cccb6d3cSBen Dooks /* Device initialisation sequences */
25cccb6d3cSBen Dooks
263fd00432SJingoo Han static const struct ili9320_reg vgg_init1[] = {
27cccb6d3cSBen Dooks {
28cccb6d3cSBen Dooks .address = ILI9320_POWER1,
29cccb6d3cSBen Dooks .value = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0),
30cccb6d3cSBen Dooks }, {
31cccb6d3cSBen Dooks .address = ILI9320_POWER2,
32cccb6d3cSBen Dooks .value = (ILI9320_POWER2_VC(7) |
33cccb6d3cSBen Dooks ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)),
34cccb6d3cSBen Dooks }, {
35cccb6d3cSBen Dooks .address = ILI9320_POWER3,
36cccb6d3cSBen Dooks .value = ILI9320_POWER3_VRH(0),
37cccb6d3cSBen Dooks }, {
38cccb6d3cSBen Dooks .address = ILI9320_POWER4,
39cccb6d3cSBen Dooks .value = ILI9320_POWER4_VREOUT(0),
40cccb6d3cSBen Dooks },
41cccb6d3cSBen Dooks };
42cccb6d3cSBen Dooks
433fd00432SJingoo Han static const struct ili9320_reg vgg_init2[] = {
44cccb6d3cSBen Dooks {
45cccb6d3cSBen Dooks .address = ILI9320_POWER1,
46cccb6d3cSBen Dooks .value = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE |
47cccb6d3cSBen Dooks ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP),
48cccb6d3cSBen Dooks }, {
49cccb6d3cSBen Dooks .address = ILI9320_POWER2,
50cccb6d3cSBen Dooks .value = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3),
51cccb6d3cSBen Dooks }
52cccb6d3cSBen Dooks };
53cccb6d3cSBen Dooks
543fd00432SJingoo Han static const struct ili9320_reg vgg_gamma[] = {
55cccb6d3cSBen Dooks {
56cccb6d3cSBen Dooks .address = ILI9320_GAMMA1,
57cccb6d3cSBen Dooks .value = 0x0000,
58cccb6d3cSBen Dooks }, {
59cccb6d3cSBen Dooks .address = ILI9320_GAMMA2,
60cccb6d3cSBen Dooks .value = 0x0505,
61cccb6d3cSBen Dooks }, {
62cccb6d3cSBen Dooks .address = ILI9320_GAMMA3,
63cccb6d3cSBen Dooks .value = 0x0004,
64cccb6d3cSBen Dooks }, {
65cccb6d3cSBen Dooks .address = ILI9320_GAMMA4,
66cccb6d3cSBen Dooks .value = 0x0006,
67cccb6d3cSBen Dooks }, {
68cccb6d3cSBen Dooks .address = ILI9320_GAMMA5,
69cccb6d3cSBen Dooks .value = 0x0707,
70cccb6d3cSBen Dooks }, {
71cccb6d3cSBen Dooks .address = ILI9320_GAMMA6,
72cccb6d3cSBen Dooks .value = 0x0105,
73cccb6d3cSBen Dooks }, {
74cccb6d3cSBen Dooks .address = ILI9320_GAMMA7,
75cccb6d3cSBen Dooks .value = 0x0002,
76cccb6d3cSBen Dooks }, {
77cccb6d3cSBen Dooks .address = ILI9320_GAMMA8,
78cccb6d3cSBen Dooks .value = 0x0707,
79cccb6d3cSBen Dooks }, {
80cccb6d3cSBen Dooks .address = ILI9320_GAMMA9,
81cccb6d3cSBen Dooks .value = 0x0704,
82cccb6d3cSBen Dooks }, {
83cccb6d3cSBen Dooks .address = ILI9320_GAMMA10,
84cccb6d3cSBen Dooks .value = 0x807,
85cccb6d3cSBen Dooks }
86cccb6d3cSBen Dooks
87cccb6d3cSBen Dooks };
88cccb6d3cSBen Dooks
893fd00432SJingoo Han static const struct ili9320_reg vgg_init0[] = {
90cccb6d3cSBen Dooks [0] = {
91cccb6d3cSBen Dooks /* set direction and scan mode gate */
92cccb6d3cSBen Dooks .address = ILI9320_DRIVER,
93cccb6d3cSBen Dooks .value = ILI9320_DRIVER_SS,
94cccb6d3cSBen Dooks }, {
95cccb6d3cSBen Dooks .address = ILI9320_DRIVEWAVE,
96cccb6d3cSBen Dooks .value = (ILI9320_DRIVEWAVE_MUSTSET |
97cccb6d3cSBen Dooks ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),
98cccb6d3cSBen Dooks }, {
99cccb6d3cSBen Dooks .address = ILI9320_ENTRYMODE,
100cccb6d3cSBen Dooks .value = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR,
101cccb6d3cSBen Dooks }, {
102cccb6d3cSBen Dooks .address = ILI9320_RESIZING,
103cccb6d3cSBen Dooks .value = 0x0,
104cccb6d3cSBen Dooks },
105cccb6d3cSBen Dooks };
106cccb6d3cSBen Dooks
107cccb6d3cSBen Dooks
vgg2432a4_lcd_init(struct ili9320 * lcd,struct ili9320_platdata * cfg)108cccb6d3cSBen Dooks static int vgg2432a4_lcd_init(struct ili9320 *lcd,
109cccb6d3cSBen Dooks struct ili9320_platdata *cfg)
110cccb6d3cSBen Dooks {
111cccb6d3cSBen Dooks unsigned int addr;
112cccb6d3cSBen Dooks int ret;
113cccb6d3cSBen Dooks
114cccb6d3cSBen Dooks /* Set VCore before anything else (VGG243237-6UFLWA) */
115cccb6d3cSBen Dooks ret = ili9320_write(lcd, 0x00e5, 0x8000);
116cccb6d3cSBen Dooks if (ret)
117cccb6d3cSBen Dooks goto err_initial;
118cccb6d3cSBen Dooks
119cccb6d3cSBen Dooks /* Start the oscillator up before we can do anything else. */
120cccb6d3cSBen Dooks ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);
121cccb6d3cSBen Dooks if (ret)
122cccb6d3cSBen Dooks goto err_initial;
123cccb6d3cSBen Dooks
124cccb6d3cSBen Dooks /* must wait at-lesat 10ms after starting */
125cccb6d3cSBen Dooks mdelay(15);
126cccb6d3cSBen Dooks
127cccb6d3cSBen Dooks ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));
128cccb6d3cSBen Dooks if (ret != 0)
129cccb6d3cSBen Dooks goto err_initial;
130cccb6d3cSBen Dooks
131cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);
132cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);
133cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);
134cccb6d3cSBen Dooks
135cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);
136cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0);
137866bbdbaSDenis V. Lunev ili9320_write(lcd, ILI9320_RGB_IF2, cfg->rgb_if2);
138cccb6d3cSBen Dooks
139cccb6d3cSBen Dooks ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));
140cccb6d3cSBen Dooks if (ret != 0)
141cccb6d3cSBen Dooks goto err_vgg;
142cccb6d3cSBen Dooks
143cccb6d3cSBen Dooks mdelay(300);
144cccb6d3cSBen Dooks
145cccb6d3cSBen Dooks ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));
146cccb6d3cSBen Dooks if (ret != 0)
147cccb6d3cSBen Dooks goto err_vgg2;
148cccb6d3cSBen Dooks
149cccb6d3cSBen Dooks mdelay(100);
150cccb6d3cSBen Dooks
151cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_POWER3, 0x13c);
152cccb6d3cSBen Dooks
153cccb6d3cSBen Dooks mdelay(100);
154cccb6d3cSBen Dooks
155cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_POWER4, 0x1c00);
156cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_POWER7, 0x000e);
157cccb6d3cSBen Dooks
158cccb6d3cSBen Dooks mdelay(100);
159cccb6d3cSBen Dooks
160cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR, 0x00);
161cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_GRAM_VERT_ADD, 0x00);
162cccb6d3cSBen Dooks
163cccb6d3cSBen Dooks ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
164cccb6d3cSBen Dooks if (ret != 0)
165cccb6d3cSBen Dooks goto err_vgg3;
166cccb6d3cSBen Dooks
167cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_HORIZ_START, 0x0);
168cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);
169cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_VERT_START, 0x0);
170cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);
171cccb6d3cSBen Dooks
172cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_DRIVER2,
173cccb6d3cSBen Dooks ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));
174cccb6d3cSBen Dooks
175cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_BASE_IMAGE, 0x1);
176cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_VERT_SCROLL, 0x00);
177cccb6d3cSBen Dooks
178cccb6d3cSBen Dooks for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;
179cccb6d3cSBen Dooks addr++) {
180cccb6d3cSBen Dooks ili9320_write(lcd, addr, 0x0);
181cccb6d3cSBen Dooks }
182cccb6d3cSBen Dooks
183cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_INTERFACE1, 0x10);
184cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);
185cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);
186cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);
187cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);
188cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);
189cccb6d3cSBen Dooks
190cccb6d3cSBen Dooks lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE |
191cccb6d3cSBen Dooks ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |
192cccb6d3cSBen Dooks 0x40);
193cccb6d3cSBen Dooks
194cccb6d3cSBen Dooks ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
195cccb6d3cSBen Dooks
196cccb6d3cSBen Dooks return 0;
197cccb6d3cSBen Dooks
198cccb6d3cSBen Dooks err_vgg3:
199cccb6d3cSBen Dooks err_vgg2:
200cccb6d3cSBen Dooks err_vgg:
201cccb6d3cSBen Dooks err_initial:
202cccb6d3cSBen Dooks return ret;
203cccb6d3cSBen Dooks }
204cccb6d3cSBen Dooks
205eb39ad25SJingoo Han #ifdef CONFIG_PM_SLEEP
vgg2432a4_suspend(struct device * dev)206eb39ad25SJingoo Han static int vgg2432a4_suspend(struct device *dev)
207cccb6d3cSBen Dooks {
208eb39ad25SJingoo Han return ili9320_suspend(dev_get_drvdata(dev));
209cccb6d3cSBen Dooks }
vgg2432a4_resume(struct device * dev)210eb39ad25SJingoo Han static int vgg2432a4_resume(struct device *dev)
211cccb6d3cSBen Dooks {
212eb39ad25SJingoo Han return ili9320_resume(dev_get_drvdata(dev));
213cccb6d3cSBen Dooks }
214cccb6d3cSBen Dooks #endif
215cccb6d3cSBen Dooks
216cccb6d3cSBen Dooks static struct ili9320_client vgg2432a4_client = {
217cccb6d3cSBen Dooks .name = "VGG2432A4",
218cccb6d3cSBen Dooks .init = vgg2432a4_lcd_init,
219cccb6d3cSBen Dooks };
220cccb6d3cSBen Dooks
221cccb6d3cSBen Dooks /* Device probe */
222cccb6d3cSBen Dooks
vgg2432a4_probe(struct spi_device * spi)2231b9e450dSBill Pemberton static int vgg2432a4_probe(struct spi_device *spi)
224cccb6d3cSBen Dooks {
225cccb6d3cSBen Dooks int ret;
226cccb6d3cSBen Dooks
227cccb6d3cSBen Dooks ret = ili9320_probe_spi(spi, &vgg2432a4_client);
228cccb6d3cSBen Dooks if (ret != 0) {
229cccb6d3cSBen Dooks dev_err(&spi->dev, "failed to initialise ili9320\n");
230cccb6d3cSBen Dooks return ret;
231cccb6d3cSBen Dooks }
232cccb6d3cSBen Dooks
233cccb6d3cSBen Dooks return 0;
234cccb6d3cSBen Dooks }
235cccb6d3cSBen Dooks
vgg2432a4_remove(struct spi_device * spi)236*a0386bbaSUwe Kleine-König static void vgg2432a4_remove(struct spi_device *spi)
237cccb6d3cSBen Dooks {
2383976e974SUwe Kleine-König ili9320_remove(spi_get_drvdata(spi));
239cccb6d3cSBen Dooks }
240cccb6d3cSBen Dooks
vgg2432a4_shutdown(struct spi_device * spi)241cccb6d3cSBen Dooks static void vgg2432a4_shutdown(struct spi_device *spi)
242cccb6d3cSBen Dooks {
2431b8d2834SJingoo Han ili9320_shutdown(spi_get_drvdata(spi));
244cccb6d3cSBen Dooks }
245cccb6d3cSBen Dooks
246eb39ad25SJingoo Han static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume);
247eb39ad25SJingoo Han
248cccb6d3cSBen Dooks static struct spi_driver vgg2432a4_driver = {
249cccb6d3cSBen Dooks .driver = {
250cccb6d3cSBen Dooks .name = "VGG2432A4",
251eb39ad25SJingoo Han .pm = &vgg2432a4_pm_ops,
252cccb6d3cSBen Dooks },
253cccb6d3cSBen Dooks .probe = vgg2432a4_probe,
254d1723fa2SBill Pemberton .remove = vgg2432a4_remove,
255cccb6d3cSBen Dooks .shutdown = vgg2432a4_shutdown,
256cccb6d3cSBen Dooks };
257cccb6d3cSBen Dooks
258462dd838SAxel Lin module_spi_driver(vgg2432a4_driver);
259cccb6d3cSBen Dooks
260cccb6d3cSBen Dooks MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
261cccb6d3cSBen Dooks MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
262cccb6d3cSBen Dooks MODULE_LICENSE("GPL v2");
263e0626e38SAnton Vorontsov MODULE_ALIAS("spi:VGG2432A4");
264