vgg2432a4.c

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