/*
* Support for NEC-nl8048hl11-01b panel driver
*
* Copyright (C) 2010 Texas Instruments Inc.
* Author: Erik Gilling <konkers@android.com>
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <video/omapdss.h>
#include <video/omap-panel-data.h>
#define LCD_XRES 800
#define LCD_YRES 480
/*
* NEC PIX Clock Ratings
* MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
*/
#define LCD_PIXEL_CLOCK 23800
static const struct {
unsigned char addr;
unsigned char dat;
} nec_8048_init_seq[] = {
{ 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
{ 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
{ 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
{ 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
{ 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
{ 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
{ 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
{ 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
{ 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
{ 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
{ 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
{ 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
{ 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
{ 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
{ 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
{ 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
{ 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
{ 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
};
/*
* NEC NL8048HL11-01B Manual
* defines HFB, HSW, HBP, VFP, VSW, VBP as shown below
*/
static struct omap_video_timings nec_8048_panel_timings = {
/* 800 x 480 @ 60 Hz Reduced blanking VESA CVT 0.31M3-R */
.x_res = LCD_XRES,
.y_res = LCD_YRES,
.pixel_clock = LCD_PIXEL_CLOCK,
.hfp = 6,
.hsw = 1,
.hbp = 4,
.vfp = 3,
.vsw = 1,
.vbp = 4,
.vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
.de_level = OMAPDSS_SIG_ACTIVE_HIGH,
.sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
};
static inline struct panel_nec_nl8048_data
*get_panel_data(const struct omap_dss_device *dssdev)
{
return (struct panel_nec_nl8048_data *) dssdev->data;
}
static int nec_8048_panel_probe(struct omap_dss_device *dssdev)
{
struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
int r;
if (!pd)
return -EINVAL;
dssdev->panel.timings = nec_8048_panel_timings;
if (gpio_is_valid(pd->qvga_gpio)) {
r = devm_gpio_request_one(&dssdev->dev, pd->qvga_gpio,
GPIOF_OUT_INIT_HIGH, "lcd QVGA");
if (r)
return r;
}
if (gpio_is_valid(pd->res_gpio)) {
r = devm_gpio_request_one(&dssdev->dev, pd->res_gpio,
GPIOF_OUT_INIT_LOW, "lcd RES");
if (r)
return r;
}
return 0;
}
static void nec_8048_panel_remove(struct omap_dss_device *dssdev)
{
}
static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
{
struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
int r;
if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
return 0;
omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
r = omapdss_dpi_display_enable(dssdev);
if (r)
goto err0;
if (gpio_is_valid(pd->res_gpio))
gpio_set_value_cansleep(pd->res_gpio, 1);
return 0;
err0:
return r;
}
static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
{
struct panel_nec_nl8048_data *pd = get_panel_data(dssdev);
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
return;
if (gpio_is_valid(pd->res_gpio))
gpio_set_value_cansleep(pd->res_gpio, 0);
omapdss_dpi_display_disable(dssdev);
}
static int nec_8048_panel_enable(struct omap_dss_device *dssdev)
{
int r;
r = nec_8048_panel_power_on(dssdev);
if (r)
return r;
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
return 0;
}
static void nec_8048_panel_disable(struct omap_dss_device *dssdev)
{
nec_8048_panel_power_off(dssdev);
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}
static int nec_8048_recommended_bpp(struct omap_dss_device *dssdev)
{
return 16;
}
static struct omap_dss_driver nec_8048_driver = {
.probe = nec_8048_panel_probe,
.remove = nec_8048_panel_remove,
.enable = nec_8048_panel_enable,
.disable = nec_8048_panel_disable,
.get_recommended_bpp = nec_8048_recommended_bpp,
.driver = {
.name = "NEC_8048_panel",
.owner = THIS_MODULE,
},
};
static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
unsigned char reg_data)
{
int ret = 0;
unsigned int cmd = 0, data = 0;
cmd = 0x0000 | reg_addr; /* register address write */
data = 0x0100 | reg_data ; /* register data write */
data = (cmd << 16) | data;
ret = spi_write(spi, (unsigned char *)&data, 4);
if (ret)
pr_err("error in spi_write %x\n", data);
return ret;
}
static int init_nec_8048_wvga_lcd(struct spi_device *spi)
{
unsigned int i;
/* Initialization Sequence */
/* nec_8048_spi_send(spi, REG, VAL) */
for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
nec_8048_init_seq[i].dat);
udelay(20);
nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
nec_8048_init_seq[i].dat);
return 0;
}
static int nec_8048_spi_probe(struct spi_device *spi)
{
spi->mode = SPI_MODE_0;
spi->bits_per_word = 32;
spi_setup(spi);
init_nec_8048_wvga_lcd(spi);
return omap_dss_register_driver(&nec_8048_driver);
}
static int nec_8048_spi_remove(struct spi_device *spi)
{
omap_dss_unregister_driver(&nec_8048_driver);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int nec_8048_spi_suspend(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
nec_8048_spi_send(spi, 2, 0x01);
mdelay(40);
return 0;
}
static int nec_8048_spi_resume(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
/* reinitialize the panel */
spi_setup(spi);
nec_8048_spi_send(spi, 2, 0x00);
init_nec_8048_wvga_lcd(spi);
return 0;
}
static SIMPLE_DEV_PM_OPS(nec_8048_spi_pm_ops, nec_8048_spi_suspend,
nec_8048_spi_resume);
#define NEC_8048_SPI_PM_OPS (&nec_8048_spi_pm_ops)
#else
#define NEC_8048_SPI_PM_OPS NULL
#endif
static struct spi_driver nec_8048_spi_driver = {
.probe = nec_8048_spi_probe,
.remove = nec_8048_spi_remove,
.driver = {
.name = "nec_8048_spi",
.owner = THIS_MODULE,
.pm = NEC_8048_SPI_PM_OPS,
},
};
module_spi_driver(nec_8048_spi_driver);
MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
MODULE_DESCRIPTION("NEC-nl8048hl11-01b Driver");
MODULE_LICENSE("GPL");