| /* |
| * 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_OPPOSITE_EDGES, |
| }; |
| |
| #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"); |