// SPDX-License-Identifier: GPL-2.0-or-later
/*
* NEC NL8048HL11 Panel driver
*
* Copyright (C) 2010 Texas Instruments Inc.
* Author: Erik Gilling <[email protected]>
* Converted to new DSS device model: Tomi Valkeinen <[email protected]>
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/fb.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <video/omapfb_dss.h>
struct panel_drv_data {
struct omap_dss_device dssdev;
struct omap_dss_device *in;
struct omap_video_timings videomode;
int data_lines;
struct gpio_desc *res_gpio;
struct spi_device *spi;
};
#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 23800000
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 },
};
static const struct omap_video_timings nec_8048_panel_timings = {
.x_res = LCD_XRES,
.y_res = LCD_YRES,
.pixelclock = 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,
};
#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
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_connect(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
if (omapdss_device_is_connected(dssdev))
return 0;
return in->ops.dpi->connect(in, dssdev);
}
static void nec_8048_disconnect(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
if (!omapdss_device_is_connected(dssdev))
return;
in->ops.dpi->disconnect(in, dssdev);
}
static int nec_8048_enable(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
int r;
if (!omapdss_device_is_connected(dssdev))
return -ENODEV;
if (omapdss_device_is_enabled(dssdev))
return 0;
if (ddata->data_lines)
in->ops.dpi->set_data_lines(in, ddata->data_lines);
in->ops.dpi->set_timings(in, &ddata->videomode);
r = in->ops.dpi->enable(in);
if (r)
return r;
/* Apparently existing DTSes use incorrect polarity (active high) */
gpiod_set_value_cansleep(ddata->res_gpio, 1);
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
return 0;
}
static void nec_8048_disable(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
if (!omapdss_device_is_enabled(dssdev))
return;
/* Apparently existing DTSes use incorrect polarity (active high) */
gpiod_set_value_cansleep(ddata->res_gpio, 0);
in->ops.dpi->disable(in);
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}
static void nec_8048_set_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
ddata->videomode = *timings;
dssdev->panel.timings = *timings;
in->ops.dpi->set_timings(in, timings);
}
static void nec_8048_get_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
*timings = ddata->videomode;
}
static int nec_8048_check_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
return in->ops.dpi->check_timings(in, timings);
}
static struct omap_dss_driver nec_8048_ops = {
.connect = nec_8048_connect,
.disconnect = nec_8048_disconnect,
.enable = nec_8048_enable,
.disable = nec_8048_disable,
.set_timings = nec_8048_set_timings,
.get_timings = nec_8048_get_timings,
.check_timings = nec_8048_check_timings,
.get_resolution = omapdss_default_get_resolution,
};
static int nec_8048_probe(struct spi_device *spi)
{
struct panel_drv_data *ddata;
struct omap_dss_device *dssdev;
int r;
dev_dbg(&spi->dev, "%s\n", __func__);
if (!spi->dev.of_node)
return -ENODEV;
spi->mode = SPI_MODE_0;
spi->bits_per_word = 32;
r = spi_setup(spi);
if (r < 0) {
dev_err(&spi->dev, "spi_setup failed: %d\n", r);
return r;
}
init_nec_8048_wvga_lcd(spi);
ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
if (ddata == NULL)
return -ENOMEM;
dev_set_drvdata(&spi->dev, ddata);
ddata->spi = spi;
ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node);
r = PTR_ERR_OR_ZERO(ddata->in);
if (r) {
dev_err(&spi->dev, "failed to find video source: %d\n", r);
return r;
}
ddata->res_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
r = PTR_ERR_OR_ZERO(ddata->res_gpio);
if (r) {
dev_err(&spi->dev, "failed to request reset gpio: %d\n", r);
goto err_gpio;
}
gpiod_set_consumer_name(ddata->res_gpio, "lcd RES");
ddata->videomode = nec_8048_panel_timings;
dssdev = &ddata->dssdev;
dssdev->dev = &spi->dev;
dssdev->driver = &nec_8048_ops;
dssdev->type = OMAP_DISPLAY_TYPE_DPI;
dssdev->owner = THIS_MODULE;
dssdev->panel.timings = ddata->videomode;
r = omapdss_register_display(dssdev);
if (r) {
dev_err(&spi->dev, "Failed to register panel\n");
goto err_reg;
}
return 0;
err_reg:
err_gpio:
omap_dss_put_device(ddata->in);
return r;
}
static void nec_8048_remove(struct spi_device *spi)
{
struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
struct omap_dss_device *dssdev = &ddata->dssdev;
struct omap_dss_device *in = ddata->in;
dev_dbg(&ddata->spi->dev, "%s\n", __func__);
omapdss_unregister_display(dssdev);
nec_8048_disable(dssdev);
nec_8048_disconnect(dssdev);
omap_dss_put_device(in);
}
#ifdef CONFIG_PM_SLEEP
static int nec_8048_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_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_pm_ops, nec_8048_suspend,
nec_8048_resume);
#define NEC_8048_PM_OPS (&nec_8048_pm_ops)
#else
#define NEC_8048_PM_OPS NULL
#endif
static const struct of_device_id nec_8048_of_match[] = {
{ .compatible = "omapdss,nec,nl8048hl11", },
{},
};
MODULE_DEVICE_TABLE(of, nec_8048_of_match);
static struct spi_driver nec_8048_driver = {
.driver = {
.name = "panel-nec-nl8048hl11",
.pm = NEC_8048_PM_OPS,
.of_match_table = nec_8048_of_match,
.suppress_bind_attrs = true,
},
.probe = nec_8048_probe,
.remove = nec_8048_remove,
};
module_spi_driver(nec_8048_driver);
MODULE_ALIAS("spi:nec,nl8048hl11");
MODULE_AUTHOR("Erik Gilling <[email protected]>");
MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
MODULE_LICENSE("GPL");
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