e3502ce97f
Convert simple/strict_strto* functions to kstrto* functions. Only simple cases are converted. simple_strto* uses are still left to places where it is used to parse numbers from a list of numbers. These need some other solution than kstrto*. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
537 lines
12 KiB
C
537 lines
12 KiB
C
/*
|
|
* LCD panel driver for TPO TD043MTEA1
|
|
*
|
|
* Author: Gražvydas Ignotas <notasas@gmail.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <video/omapdss.h>
|
|
|
|
#define TPO_R02_MODE(x) ((x) & 7)
|
|
#define TPO_R02_MODE_800x480 7
|
|
#define TPO_R02_NCLK_RISING BIT(3)
|
|
#define TPO_R02_HSYNC_HIGH BIT(4)
|
|
#define TPO_R02_VSYNC_HIGH BIT(5)
|
|
|
|
#define TPO_R03_NSTANDBY BIT(0)
|
|
#define TPO_R03_EN_CP_CLK BIT(1)
|
|
#define TPO_R03_EN_VGL_PUMP BIT(2)
|
|
#define TPO_R03_EN_PWM BIT(3)
|
|
#define TPO_R03_DRIVING_CAP_100 BIT(4)
|
|
#define TPO_R03_EN_PRE_CHARGE BIT(6)
|
|
#define TPO_R03_SOFTWARE_CTL BIT(7)
|
|
|
|
#define TPO_R04_NFLIP_H BIT(0)
|
|
#define TPO_R04_NFLIP_V BIT(1)
|
|
#define TPO_R04_CP_CLK_FREQ_1H BIT(2)
|
|
#define TPO_R04_VGL_FREQ_1H BIT(4)
|
|
|
|
#define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \
|
|
TPO_R03_EN_VGL_PUMP | TPO_R03_EN_PWM | \
|
|
TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
|
|
TPO_R03_SOFTWARE_CTL)
|
|
|
|
#define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \
|
|
TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)
|
|
|
|
static const u16 tpo_td043_def_gamma[12] = {
|
|
106, 200, 289, 375, 460, 543, 625, 705, 785, 864, 942, 1020
|
|
};
|
|
|
|
struct tpo_td043_device {
|
|
struct spi_device *spi;
|
|
struct regulator *vcc_reg;
|
|
u16 gamma[12];
|
|
u32 mode;
|
|
u32 hmirror:1;
|
|
u32 vmirror:1;
|
|
};
|
|
|
|
static int tpo_td043_write(struct spi_device *spi, u8 addr, u8 data)
|
|
{
|
|
struct spi_message m;
|
|
struct spi_transfer xfer;
|
|
u16 w;
|
|
int r;
|
|
|
|
spi_message_init(&m);
|
|
|
|
memset(&xfer, 0, sizeof(xfer));
|
|
|
|
w = ((u16)addr << 10) | (1 << 8) | data;
|
|
xfer.tx_buf = &w;
|
|
xfer.bits_per_word = 16;
|
|
xfer.len = 2;
|
|
spi_message_add_tail(&xfer, &m);
|
|
|
|
r = spi_sync(spi, &m);
|
|
if (r < 0)
|
|
dev_warn(&spi->dev, "failed to write to LCD reg (%d)\n", r);
|
|
return r;
|
|
}
|
|
|
|
static void tpo_td043_write_gamma(struct spi_device *spi, u16 gamma[12])
|
|
{
|
|
u8 i, val;
|
|
|
|
/* gamma bits [9:8] */
|
|
for (val = i = 0; i < 4; i++)
|
|
val |= (gamma[i] & 0x300) >> ((i + 1) * 2);
|
|
tpo_td043_write(spi, 0x11, val);
|
|
|
|
for (val = i = 0; i < 4; i++)
|
|
val |= (gamma[i+4] & 0x300) >> ((i + 1) * 2);
|
|
tpo_td043_write(spi, 0x12, val);
|
|
|
|
for (val = i = 0; i < 4; i++)
|
|
val |= (gamma[i+8] & 0x300) >> ((i + 1) * 2);
|
|
tpo_td043_write(spi, 0x13, val);
|
|
|
|
/* gamma bits [7:0] */
|
|
for (val = i = 0; i < 12; i++)
|
|
tpo_td043_write(spi, 0x14 + i, gamma[i] & 0xff);
|
|
}
|
|
|
|
static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
|
|
{
|
|
u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V | \
|
|
TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
|
|
if (h)
|
|
reg4 &= ~TPO_R04_NFLIP_H;
|
|
if (v)
|
|
reg4 &= ~TPO_R04_NFLIP_V;
|
|
|
|
return tpo_td043_write(spi, 4, reg4);
|
|
}
|
|
|
|
static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
|
|
|
|
tpo_td043->hmirror = enable;
|
|
return tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
|
|
tpo_td043->vmirror);
|
|
}
|
|
|
|
static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
|
|
|
|
return tpo_td043->hmirror;
|
|
}
|
|
|
|
static ssize_t tpo_td043_vmirror_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", tpo_td043->vmirror);
|
|
}
|
|
|
|
static ssize_t tpo_td043_vmirror_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
|
|
int val;
|
|
int ret;
|
|
|
|
ret = kstrtoint(buf, 0, &val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
val = !!val;
|
|
|
|
ret = tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
tpo_td043->vmirror = val;
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t tpo_td043_mode_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", tpo_td043->mode);
|
|
}
|
|
|
|
static ssize_t tpo_td043_mode_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
|
|
long val;
|
|
int ret;
|
|
|
|
ret = kstrtol(buf, 0, &val);
|
|
if (ret != 0 || val & ~7)
|
|
return -EINVAL;
|
|
|
|
tpo_td043->mode = val;
|
|
|
|
val |= TPO_R02_NCLK_RISING;
|
|
tpo_td043_write(tpo_td043->spi, 2, val);
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t tpo_td043_gamma_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
|
|
ssize_t len = 0;
|
|
int ret;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tpo_td043->gamma); i++) {
|
|
ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",
|
|
tpo_td043->gamma[i]);
|
|
if (ret < 0)
|
|
return ret;
|
|
len += ret;
|
|
}
|
|
buf[len - 1] = '\n';
|
|
|
|
return len;
|
|
}
|
|
|
|
static ssize_t tpo_td043_gamma_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
|
|
unsigned int g[12];
|
|
int ret;
|
|
int i;
|
|
|
|
ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",
|
|
&g[0], &g[1], &g[2], &g[3], &g[4], &g[5],
|
|
&g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);
|
|
|
|
if (ret != 12)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < 12; i++)
|
|
tpo_td043->gamma[i] = g[i];
|
|
|
|
tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma);
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR,
|
|
tpo_td043_vmirror_show, tpo_td043_vmirror_store);
|
|
static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
|
|
tpo_td043_mode_show, tpo_td043_mode_store);
|
|
static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR,
|
|
tpo_td043_gamma_show, tpo_td043_gamma_store);
|
|
|
|
static struct attribute *tpo_td043_attrs[] = {
|
|
&dev_attr_vmirror.attr,
|
|
&dev_attr_mode.attr,
|
|
&dev_attr_gamma.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group tpo_td043_attr_group = {
|
|
.attrs = tpo_td043_attrs,
|
|
};
|
|
|
|
static const struct omap_video_timings tpo_td043_timings = {
|
|
.x_res = 800,
|
|
.y_res = 480,
|
|
|
|
.pixel_clock = 36000,
|
|
|
|
.hsw = 1,
|
|
.hfp = 68,
|
|
.hbp = 214,
|
|
|
|
.vsw = 1,
|
|
.vfp = 39,
|
|
.vbp = 34,
|
|
};
|
|
|
|
static int tpo_td043_power_on(struct omap_dss_device *dssdev)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
|
|
int nreset_gpio = dssdev->reset_gpio;
|
|
int r;
|
|
|
|
if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
|
|
return 0;
|
|
|
|
r = omapdss_dpi_display_enable(dssdev);
|
|
if (r)
|
|
goto err0;
|
|
|
|
if (dssdev->platform_enable) {
|
|
r = dssdev->platform_enable(dssdev);
|
|
if (r)
|
|
goto err1;
|
|
}
|
|
|
|
regulator_enable(tpo_td043->vcc_reg);
|
|
|
|
/* wait for power up */
|
|
msleep(160);
|
|
|
|
if (gpio_is_valid(nreset_gpio))
|
|
gpio_set_value(nreset_gpio, 1);
|
|
|
|
tpo_td043_write(tpo_td043->spi, 2,
|
|
TPO_R02_MODE(tpo_td043->mode) | TPO_R02_NCLK_RISING);
|
|
tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_NORMAL);
|
|
tpo_td043_write(tpo_td043->spi, 0x20, 0xf0);
|
|
tpo_td043_write(tpo_td043->spi, 0x21, 0xf0);
|
|
tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
|
|
tpo_td043->vmirror);
|
|
tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma);
|
|
|
|
return 0;
|
|
err1:
|
|
omapdss_dpi_display_disable(dssdev);
|
|
err0:
|
|
return r;
|
|
}
|
|
|
|
static void tpo_td043_power_off(struct omap_dss_device *dssdev)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
|
|
int nreset_gpio = dssdev->reset_gpio;
|
|
|
|
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
|
|
return;
|
|
|
|
tpo_td043_write(tpo_td043->spi, 3,
|
|
TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);
|
|
|
|
if (gpio_is_valid(nreset_gpio))
|
|
gpio_set_value(nreset_gpio, 0);
|
|
|
|
/* wait for at least 2 vsyncs before cutting off power */
|
|
msleep(50);
|
|
|
|
tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_STANDBY);
|
|
|
|
regulator_disable(tpo_td043->vcc_reg);
|
|
|
|
if (dssdev->platform_disable)
|
|
dssdev->platform_disable(dssdev);
|
|
|
|
omapdss_dpi_display_disable(dssdev);
|
|
}
|
|
|
|
static int tpo_td043_enable(struct omap_dss_device *dssdev)
|
|
{
|
|
int ret;
|
|
|
|
dev_dbg(&dssdev->dev, "enable\n");
|
|
|
|
ret = tpo_td043_power_on(dssdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tpo_td043_disable(struct omap_dss_device *dssdev)
|
|
{
|
|
dev_dbg(&dssdev->dev, "disable\n");
|
|
|
|
tpo_td043_power_off(dssdev);
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
|
|
}
|
|
|
|
static int tpo_td043_suspend(struct omap_dss_device *dssdev)
|
|
{
|
|
tpo_td043_power_off(dssdev);
|
|
dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
|
|
return 0;
|
|
}
|
|
|
|
static int tpo_td043_resume(struct omap_dss_device *dssdev)
|
|
{
|
|
int r = 0;
|
|
|
|
r = tpo_td043_power_on(dssdev);
|
|
if (r)
|
|
return r;
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tpo_td043_probe(struct omap_dss_device *dssdev)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
|
|
int nreset_gpio = dssdev->reset_gpio;
|
|
int ret = 0;
|
|
|
|
dev_dbg(&dssdev->dev, "probe\n");
|
|
|
|
if (tpo_td043 == NULL) {
|
|
dev_err(&dssdev->dev, "missing tpo_td043_device\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IHS |
|
|
OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IPC;
|
|
dssdev->panel.timings = tpo_td043_timings;
|
|
dssdev->ctrl.pixel_size = 24;
|
|
|
|
tpo_td043->mode = TPO_R02_MODE_800x480;
|
|
memcpy(tpo_td043->gamma, tpo_td043_def_gamma, sizeof(tpo_td043->gamma));
|
|
|
|
tpo_td043->vcc_reg = regulator_get(&dssdev->dev, "vcc");
|
|
if (IS_ERR(tpo_td043->vcc_reg)) {
|
|
dev_err(&dssdev->dev, "failed to get LCD VCC regulator\n");
|
|
ret = PTR_ERR(tpo_td043->vcc_reg);
|
|
goto fail_regulator;
|
|
}
|
|
|
|
if (gpio_is_valid(nreset_gpio)) {
|
|
ret = gpio_request(nreset_gpio, "lcd reset");
|
|
if (ret < 0) {
|
|
dev_err(&dssdev->dev, "couldn't request reset GPIO\n");
|
|
goto fail_gpio_req;
|
|
}
|
|
|
|
ret = gpio_direction_output(nreset_gpio, 0);
|
|
if (ret < 0) {
|
|
dev_err(&dssdev->dev, "couldn't set GPIO direction\n");
|
|
goto fail_gpio_direction;
|
|
}
|
|
}
|
|
|
|
ret = sysfs_create_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
|
|
if (ret)
|
|
dev_warn(&dssdev->dev, "failed to create sysfs files\n");
|
|
|
|
return 0;
|
|
|
|
fail_gpio_direction:
|
|
gpio_free(nreset_gpio);
|
|
fail_gpio_req:
|
|
regulator_put(tpo_td043->vcc_reg);
|
|
fail_regulator:
|
|
kfree(tpo_td043);
|
|
return ret;
|
|
}
|
|
|
|
static void tpo_td043_remove(struct omap_dss_device *dssdev)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
|
|
int nreset_gpio = dssdev->reset_gpio;
|
|
|
|
dev_dbg(&dssdev->dev, "remove\n");
|
|
|
|
sysfs_remove_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
|
|
regulator_put(tpo_td043->vcc_reg);
|
|
if (gpio_is_valid(nreset_gpio))
|
|
gpio_free(nreset_gpio);
|
|
}
|
|
|
|
static struct omap_dss_driver tpo_td043_driver = {
|
|
.probe = tpo_td043_probe,
|
|
.remove = tpo_td043_remove,
|
|
|
|
.enable = tpo_td043_enable,
|
|
.disable = tpo_td043_disable,
|
|
.suspend = tpo_td043_suspend,
|
|
.resume = tpo_td043_resume,
|
|
.set_mirror = tpo_td043_set_hmirror,
|
|
.get_mirror = tpo_td043_get_hmirror,
|
|
|
|
.driver = {
|
|
.name = "tpo_td043mtea1_panel",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int tpo_td043_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct omap_dss_device *dssdev = spi->dev.platform_data;
|
|
struct tpo_td043_device *tpo_td043;
|
|
int ret;
|
|
|
|
if (dssdev == NULL) {
|
|
dev_err(&spi->dev, "missing dssdev\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
spi->bits_per_word = 16;
|
|
spi->mode = SPI_MODE_0;
|
|
|
|
ret = spi_setup(spi);
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "spi_setup failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
tpo_td043 = kzalloc(sizeof(*tpo_td043), GFP_KERNEL);
|
|
if (tpo_td043 == NULL)
|
|
return -ENOMEM;
|
|
|
|
tpo_td043->spi = spi;
|
|
dev_set_drvdata(&spi->dev, tpo_td043);
|
|
dev_set_drvdata(&dssdev->dev, tpo_td043);
|
|
|
|
omap_dss_register_driver(&tpo_td043_driver);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit tpo_td043_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&spi->dev);
|
|
|
|
omap_dss_unregister_driver(&tpo_td043_driver);
|
|
kfree(tpo_td043);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct spi_driver tpo_td043_spi_driver = {
|
|
.driver = {
|
|
.name = "tpo_td043mtea1_panel_spi",
|
|
.bus = &spi_bus_type,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tpo_td043_spi_probe,
|
|
.remove = __devexit_p(tpo_td043_spi_remove),
|
|
};
|
|
|
|
static int __init tpo_td043_init(void)
|
|
{
|
|
return spi_register_driver(&tpo_td043_spi_driver);
|
|
}
|
|
|
|
static void __exit tpo_td043_exit(void)
|
|
{
|
|
spi_unregister_driver(&tpo_td043_spi_driver);
|
|
}
|
|
|
|
module_init(tpo_td043_init);
|
|
module_exit(tpo_td043_exit);
|
|
|
|
MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
|
|
MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
|
|
MODULE_LICENSE("GPL");
|