345 lines
7.5 KiB
C
345 lines
7.5 KiB
C
/*
|
|
* LCD panel driver for Sharp LS037V7DW01
|
|
*
|
|
* Copyright (C) 2013 Texas Instruments
|
|
* Author: Tomi Valkeinen <tomi.valkeinen@ti.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.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
#include "../dss/omapdss.h"
|
|
|
|
struct panel_drv_data {
|
|
struct omap_dss_device dssdev;
|
|
struct omap_dss_device *in;
|
|
struct regulator *vcc;
|
|
|
|
int data_lines;
|
|
|
|
struct videomode vm;
|
|
|
|
struct gpio_desc *resb_gpio; /* low = reset active min 20 us */
|
|
struct gpio_desc *ini_gpio; /* high = power on */
|
|
struct gpio_desc *mo_gpio; /* low = 480x640, high = 240x320 */
|
|
struct gpio_desc *lr_gpio; /* high = conventional horizontal scanning */
|
|
struct gpio_desc *ud_gpio; /* high = conventional vertical scanning */
|
|
};
|
|
|
|
static const struct videomode sharp_ls_vm = {
|
|
.hactive = 480,
|
|
.vactive = 640,
|
|
|
|
.pixelclock = 19200000,
|
|
|
|
.hsync_len = 2,
|
|
.hfront_porch = 1,
|
|
.hback_porch = 28,
|
|
|
|
.vsync_len = 1,
|
|
.vfront_porch = 1,
|
|
.vback_porch = 1,
|
|
|
|
.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
|
|
DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_NEGEDGE |
|
|
DISPLAY_FLAGS_PIXDATA_POSEDGE,
|
|
/*
|
|
* Note: According to the panel documentation:
|
|
* DATA needs to be driven on the FALLING edge
|
|
*/
|
|
};
|
|
|
|
#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
|
|
|
|
static int sharp_ls_connect(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 0;
|
|
|
|
r = in->ops.dpi->connect(in, dssdev);
|
|
if (r)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sharp_ls_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 sharp_ls_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->vm);
|
|
|
|
if (ddata->vcc) {
|
|
r = regulator_enable(ddata->vcc);
|
|
if (r != 0)
|
|
return r;
|
|
}
|
|
|
|
r = in->ops.dpi->enable(in);
|
|
if (r) {
|
|
regulator_disable(ddata->vcc);
|
|
return r;
|
|
}
|
|
|
|
/* wait couple of vsyncs until enabling the LCD */
|
|
msleep(50);
|
|
|
|
if (ddata->resb_gpio)
|
|
gpiod_set_value_cansleep(ddata->resb_gpio, 1);
|
|
|
|
if (ddata->ini_gpio)
|
|
gpiod_set_value_cansleep(ddata->ini_gpio, 1);
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sharp_ls_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;
|
|
|
|
if (ddata->ini_gpio)
|
|
gpiod_set_value_cansleep(ddata->ini_gpio, 0);
|
|
|
|
if (ddata->resb_gpio)
|
|
gpiod_set_value_cansleep(ddata->resb_gpio, 0);
|
|
|
|
/* wait at least 5 vsyncs after disabling the LCD */
|
|
|
|
msleep(100);
|
|
|
|
in->ops.dpi->disable(in);
|
|
|
|
if (ddata->vcc)
|
|
regulator_disable(ddata->vcc);
|
|
|
|
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
|
|
}
|
|
|
|
static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
|
|
struct videomode *vm)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
ddata->vm = *vm;
|
|
dssdev->panel.vm = *vm;
|
|
|
|
in->ops.dpi->set_timings(in, vm);
|
|
}
|
|
|
|
static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
|
|
struct videomode *vm)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
|
|
*vm = ddata->vm;
|
|
}
|
|
|
|
static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
|
|
struct videomode *vm)
|
|
{
|
|
struct panel_drv_data *ddata = to_panel_data(dssdev);
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
return in->ops.dpi->check_timings(in, vm);
|
|
}
|
|
|
|
static struct omap_dss_driver sharp_ls_ops = {
|
|
.connect = sharp_ls_connect,
|
|
.disconnect = sharp_ls_disconnect,
|
|
|
|
.enable = sharp_ls_enable,
|
|
.disable = sharp_ls_disable,
|
|
|
|
.set_timings = sharp_ls_set_timings,
|
|
.get_timings = sharp_ls_get_timings,
|
|
.check_timings = sharp_ls_check_timings,
|
|
|
|
.get_resolution = omapdss_default_get_resolution,
|
|
};
|
|
|
|
static int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
|
|
const char *desc, struct gpio_desc **gpiod)
|
|
{
|
|
struct gpio_desc *gd;
|
|
|
|
*gpiod = NULL;
|
|
|
|
gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
|
|
if (IS_ERR(gd))
|
|
return PTR_ERR(gd);
|
|
|
|
*gpiod = gd;
|
|
return 0;
|
|
}
|
|
|
|
static int sharp_ls_probe_of(struct platform_device *pdev)
|
|
{
|
|
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct omap_dss_device *in;
|
|
int r;
|
|
|
|
ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
|
|
if (IS_ERR(ddata->vcc)) {
|
|
dev_err(&pdev->dev, "failed to get regulator\n");
|
|
return PTR_ERR(ddata->vcc);
|
|
}
|
|
|
|
/* lcd INI */
|
|
r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
|
|
if (r)
|
|
return r;
|
|
|
|
/* lcd RESB */
|
|
r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
|
|
if (r)
|
|
return r;
|
|
|
|
/* lcd MO */
|
|
r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
|
|
if (r)
|
|
return r;
|
|
|
|
/* lcd LR */
|
|
r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
|
|
if (r)
|
|
return r;
|
|
|
|
/* lcd UD */
|
|
r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio);
|
|
if (r)
|
|
return r;
|
|
|
|
in = omapdss_of_find_source_for_first_ep(node);
|
|
if (IS_ERR(in)) {
|
|
dev_err(&pdev->dev, "failed to find video source\n");
|
|
return PTR_ERR(in);
|
|
}
|
|
|
|
ddata->in = in;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sharp_ls_probe(struct platform_device *pdev)
|
|
{
|
|
struct panel_drv_data *ddata;
|
|
struct omap_dss_device *dssdev;
|
|
int r;
|
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
|
|
if (ddata == NULL)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, ddata);
|
|
|
|
if (!pdev->dev.of_node)
|
|
return -ENODEV;
|
|
|
|
r = sharp_ls_probe_of(pdev);
|
|
if (r)
|
|
return r;
|
|
|
|
ddata->vm = sharp_ls_vm;
|
|
|
|
dssdev = &ddata->dssdev;
|
|
dssdev->dev = &pdev->dev;
|
|
dssdev->driver = &sharp_ls_ops;
|
|
dssdev->type = OMAP_DISPLAY_TYPE_DPI;
|
|
dssdev->owner = THIS_MODULE;
|
|
dssdev->panel.vm = ddata->vm;
|
|
dssdev->phy.dpi.data_lines = ddata->data_lines;
|
|
|
|
r = omapdss_register_display(dssdev);
|
|
if (r) {
|
|
dev_err(&pdev->dev, "Failed to register panel\n");
|
|
goto err_reg;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_reg:
|
|
omap_dss_put_device(ddata->in);
|
|
return r;
|
|
}
|
|
|
|
static int __exit sharp_ls_remove(struct platform_device *pdev)
|
|
{
|
|
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
|
|
struct omap_dss_device *dssdev = &ddata->dssdev;
|
|
struct omap_dss_device *in = ddata->in;
|
|
|
|
omapdss_unregister_display(dssdev);
|
|
|
|
sharp_ls_disable(dssdev);
|
|
sharp_ls_disconnect(dssdev);
|
|
|
|
omap_dss_put_device(in);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sharp_ls_of_match[] = {
|
|
{ .compatible = "omapdss,sharp,ls037v7dw01", },
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
|
|
|
|
static struct platform_driver sharp_ls_driver = {
|
|
.probe = sharp_ls_probe,
|
|
.remove = __exit_p(sharp_ls_remove),
|
|
.driver = {
|
|
.name = "panel-sharp-ls037v7dw01",
|
|
.of_match_table = sharp_ls_of_match,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(sharp_ls_driver);
|
|
|
|
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
|
|
MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
|
|
MODULE_LICENSE("GPL");
|