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/*
* Copyright (C) 2009 Openmoko, Inc.
*
* Author: Matt Hsu <matt_hsu@openmoko.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/l1k002.h>
struct l1k002_data {
struct spi_device *spi;
struct mutex lock;
u8 mosi_buf[2];
u8 reg_cache[0x40];
};
enum l1k002_regs_table {
L1K002_REG_SYNCP_SEL = 0x02,
L1K002_REG_VSTS = 0x03,
L1K002_REG_HSTS = 0x04,
L1K002_REG_MISC = 0x07,
L1K002_REG_CMDR = 0x08,
L1K002_REG_IN_DATA_TIMING = 0x09,
L1K002_REG_ENGR_OTP = 0x0b,
L1K002_REG_VGLS = 0x0c,
L1K002_REG_DISP_8_9 = 0x0d,
L1K002_REG_DISP_0_7 = 0x0e,
L1K002_REG_HTOTAL_8_10 = 0x0f,
L1K002_REG_HTOTAL_0_7 = 0x10,
L1K002_REG_WCKH = 0x20,
L1K002_REG_GCKH = 0x21,
L1K002_REG_DCKH = 0x22,
L1K002_REG_WENBV = 0x23,
L1K002_REG_DCKV = 0x25,
L1K002_REG_WCKV = 0x27,
L1K002_REG_DA_VCOM = 0x2a,
L1K002_REG_PVH = 0x2b,
L1K002_REG_NVH_NVL = 0x2c,
L1K002_REG_GC1 = 0x2d,
L1K002_REG_GC2 = 0x2e,
L1K002_REG_GC3 = 0x2f,
L1K002_REG_GC4 = 0x30,
L1K002_REG_GC5 = 0x31,
L1K002_REG_GC6 = 0x32,
L1K002_REG_GC7 = 0x33,
L1K002_REG_GC8 = 0x34,
L1K002_REG_GC9 = 0x35,
L1K002_REG_GC10 = 0x36,
L1K002_REG_GC11 = 0x37,
L1K002_REG_GC12 = 0x38,
L1K002_REG_GC13 = 0x39,
L1K002_REG_GC14 = 0x3a,
L1K002_REG_GC15 = 0x3b,
};
static int l1k002_reg_write(struct l1k002_data *l1k002, u8 reg, u8 data)
{
int ret;
mutex_lock(&l1k002->lock);
l1k002->mosi_buf[0] = reg;
l1k002->mosi_buf[1] = data;
ret = spi_write(l1k002->spi, (u8 *)l1k002->mosi_buf, 2*sizeof(u8));
if (ret == 0)
l1k002->reg_cache[reg] = data;
else
dev_err(&l1k002->spi->dev, "reg spi_write ret: %d\n", ret);
mutex_unlock(&l1k002->lock);
return ret;
}
static int l1k002_init_reg(struct l1k002_data *l1k002)
{
int ret;
/* software reset */
ret = l1k002_reg_write(l1k002, L1K002_REG_CMDR, 0x01);
ret |= l1k002_reg_write(l1k002, L1K002_REG_CMDR, 0x00);
/* setup color mode and direction */
ret |= l1k002_reg_write(l1k002, L1K002_REG_MISC, 0xd9);
/* dclk initial */
ret |= l1k002_reg_write(l1k002, L1K002_REG_SYNCP_SEL, 0x00);
/* start vertical data */
ret |= l1k002_reg_write(l1k002, L1K002_REG_VSTS, 0x04);
/* start horizonal data */
ret |= l1k002_reg_write(l1k002, L1K002_REG_HSTS, 0x14);
/* setup hsnc, vsnc, data_enable */
ret |= l1k002_reg_write(l1k002, L1K002_REG_IN_DATA_TIMING, 0x03);
/* enable engineering mode and OTP */
ret |= l1k002_reg_write(l1k002, L1K002_REG_ENGR_OTP, 0x18);
/* display area */
ret |= l1k002_reg_write(l1k002, L1K002_REG_VGLS, 0x41);
ret |= l1k002_reg_write(l1k002, L1K002_REG_DISP_8_9, 0x02);
ret |= l1k002_reg_write(l1k002, L1K002_REG_DISP_0_7, 0x80);
ret |= l1k002_reg_write(l1k002, L1K002_REG_HTOTAL_8_10, 0x02);
ret |= l1k002_reg_write(l1k002, L1K002_REG_HTOTAL_0_7, 0x08);
/* CKH pulse config */
ret |= l1k002_reg_write(l1k002, L1K002_REG_WCKH, 0x3c);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GCKH, 0x0c);
ret |= l1k002_reg_write(l1k002, L1K002_REG_DCKH, 0x10);
/* ENBV config */
ret |= l1k002_reg_write(l1k002, L1K002_REG_WENBV, 0x38);
ret |= l1k002_reg_write(l1k002, L1K002_REG_DCKV, 0x3c);
ret |= l1k002_reg_write(l1k002, L1K002_REG_WCKV, 0xdb);
/* driving voltage */
ret |= l1k002_reg_write(l1k002, L1K002_REG_DA_VCOM, 0x66);
/* gamma output voltage level */
ret |= l1k002_reg_write(l1k002, L1K002_REG_PVH, 0x70);
ret |= l1k002_reg_write(l1k002, L1K002_REG_NVH_NVL, 0x70);
/* gamma correction */
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC1, 0x15);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC2, 0xaa);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC3, 0xbf);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC4, 0x86);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC5, 0x11);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC6, 0x5e);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC7, 0xb6);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC8, 0x16);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC9, 0x4e);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC10, 0x78);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC11, 0xbf);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC12, 0xec);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC13, 0x10);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC14, 0x30);
ret |= l1k002_reg_write(l1k002, L1K002_REG_GC15, 0xff);
ret |= l1k002_reg_write(l1k002, 0x07, 0xc9);
if (ret == 0)
dev_info(&l1k002->spi->dev, "initialize OK \n");
else
dev_err(&l1k002->spi->dev, "initialize failed ret: %d\n", ret);
return ret;
}
static int l1k002_probe(struct spi_device *spi)
{
int ret;
struct l1k002_data *l1k002;
struct l1k002_platform_data *l1k002_pdata = spi->dev.platform_data;
if (l1k002_pdata == NULL) {
dev_err(&spi->dev,
"no platform data available \n");
return -EINVAL;
}
spi->mode = SPI_CPOL | SPI_CPHA;
spi->bits_per_word = 8;
ret = spi_setup(spi);
if (ret < 0) {
dev_err(&spi->dev,
"error during spi_setup of l1k002 driver\n");
return ret;
}
l1k002 = kzalloc(sizeof(*l1k002), GFP_KERNEL);
if (!l1k002)
return -ENOMEM;
l1k002->spi = spi;
dev_set_drvdata(&spi->dev, l1k002);
mutex_init(&l1k002->lock);
/* hard reset l1k002 */
(l1k002_pdata->pwr_onoff)(1);
ret = l1k002_init_reg(l1k002);
if (ret)
goto err_free;
/* FIXME: sysfs should be added here */
return 0;
err_free:
kfree(l1k002);
return ret;
}
static int __devexit l1k002_remove(struct spi_device *spi)
{
struct l1k002 *l1k002 = dev_get_drvdata(&spi->dev);
dev_set_drvdata(&spi->dev, NULL);
kfree(l1k002);
return 0;
}
#ifdef CONFIG_PM
static int l1k002_suspend(struct spi_device *spi, pm_message_t state)
{
struct l1k002_platform_data *l1k002_pdata = spi->dev.platform_data;
/* l1k002 doesn't have sleep mode
* it should be powered down as entering suspend state
*/
(l1k002_pdata->pwr_onoff)(0);
return 0;
}
static int l1k002_resume(struct spi_device *spi)
{
struct l1k002_platform_data *l1k002_pdata = spi->dev.platform_data;
struct l1k002_data *l1k002 = dev_get_drvdata(&spi->dev);
(l1k002_pdata->pwr_onoff)(1);
return l1k002_init_reg(l1k002);
}
#else
#define l1k002_suspend NULL
#define l1k002_resume NULL
#endif
static struct spi_driver l1k002_driver = {
.driver = {
.name = "l1k002",
.owner = THIS_MODULE,
},
.probe = l1k002_probe,
.remove = __devexit_p(l1k002_remove),
.suspend = l1k002_suspend,
.resume = l1k002_resume,
};
static int __init l1k002_init(void)
{
return spi_register_driver(&l1k002_driver);
}
static void __exit l1k002_exit(void)
{
spi_unregister_driver(&l1k002_driver);
}
MODULE_AUTHOR("Matt Hsu <matt_hsu@openmoko.org>");
MODULE_LICENSE("GPL v2");
module_init(l1k002_init);
module_exit(l1k002_exit);
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