1 files changed, 415 insertions, 0 deletions

diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c
new file mode 100644
index 000000000000..abfd1f6e3327
--- /dev/null
+++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c
@@ -0,0 +1,415 @@
+/*
+ * 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;
+
+        *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 (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");