--- /dev/null
+/*
+ * 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.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
+#include <video/omapdss.h>
+#include <video/omap-panel-data.h>
+
+struct panel_drv_data {
+ struct omap_dss_device dssdev;
+ struct omap_dss_device *in;
+ struct regulator *vcc;
+
+ int data_lines;
+
+ struct omap_video_timings videomode;
+
+ 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 omap_video_timings sharp_ls_timings = {
+ .x_res = 480,
+ .y_res = 640,
+
+ .pixelclock = 19200000,
+
+ .hsw = 2,
+ .hfp = 1,
+ .hbp = 28,
+
+ .vsw = 1,
+ .vfp = 1,
+ .vbp = 1,
+
+ .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_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->videomode);
+
+ 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 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 sharp_ls_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 sharp_ls_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 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(struct device *dev, int gpio, unsigned long flags,
+ char *desc, struct gpio_desc **gpiod)
+{
+ struct gpio_desc *gd;
+ int r;
+
+ *gpiod = NULL;
+
+ r = devm_gpio_request_one(dev, gpio, flags, desc);
+ if (r)
+ return r == -ENOENT ? 0 : r;
+
+ gd = gpio_to_desc(gpio);
+ if (IS_ERR(gd))
+ return PTR_ERR(gd) == -ENOENT ? 0 : PTR_ERR(gd);
+
+ *gpiod = gd;
+ return 0;
+}
+
+static int sharp_ls_probe_pdata(struct platform_device *pdev)
+{
+ const struct panel_sharp_ls037v7dw01_platform_data *pdata;
+ struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+ struct omap_dss_device *dssdev, *in;
+ int r;
+
+ pdata = dev_get_platdata(&pdev->dev);
+
+ in = omap_dss_find_output(pdata->source);
+ if (in == NULL) {
+ dev_err(&pdev->dev, "failed to find video source '%s'\n",
+ pdata->source);
+ return -EPROBE_DEFER;
+ }
+
+ ddata->in = in;
+
+ ddata->data_lines = pdata->data_lines;
+
+ dssdev = &ddata->dssdev;
+ dssdev->name = pdata->name;
+
+ r = sharp_ls_get_gpio(&pdev->dev, pdata->mo_gpio, GPIOF_OUT_INIT_LOW,
+ "lcd MO", &ddata->mo_gpio);
+ if (r)
+ return r;
+ r = sharp_ls_get_gpio(&pdev->dev, pdata->lr_gpio, GPIOF_OUT_INIT_HIGH,
+ "lcd LR", &ddata->lr_gpio);
+ if (r)
+ return r;
+ r = sharp_ls_get_gpio(&pdev->dev, pdata->ud_gpio, GPIOF_OUT_INIT_HIGH,
+ "lcd UD", &ddata->ud_gpio);
+ if (r)
+ return r;
+ r = sharp_ls_get_gpio(&pdev->dev, pdata->resb_gpio, GPIOF_OUT_INIT_LOW,
+ "lcd RESB", &ddata->resb_gpio);
+ if (r)
+ return r;
+ r = sharp_ls_get_gpio(&pdev->dev, pdata->ini_gpio, GPIOF_OUT_INIT_LOW,
+ "lcd INI", &ddata->ini_gpio);
+ if (r)
+ return r;
+
+ return 0;
+}
+
+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;
+ int r;
+
+ *gpiod = NULL;
+
+ gd = devm_gpiod_get_index(dev, desc, index);
+ if (IS_ERR(gd))
+ return PTR_ERR(gd) == -ENOENT ? 0 : PTR_ERR(gd);
+
+ r = gpiod_direction_output(gd, val);
+ if (r)
+ return r;
+
+ *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 (dev_get_platdata(&pdev->dev)) {
+ r = sharp_ls_probe_pdata(pdev);
+ if (r)
+ return r;
+ } else if (pdev->dev.of_node) {
+ r = sharp_ls_probe_of(pdev);
+ if (r)
+ return r;
+ } else {
+ return -ENODEV;
+ }
+
+ ddata->videomode = sharp_ls_timings;
+
+ dssdev = &ddata->dssdev;
+ dssdev->dev = &pdev->dev;
+ dssdev->driver = &sharp_ls_ops;
+ dssdev->type = OMAP_DISPLAY_TYPE_DPI;
+ dssdev->owner = THIS_MODULE;
+ dssdev->panel.timings = ddata->videomode;
+ 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");
Code Review / kvmfornfv.git / blobdiff