--- /dev/null
+/*
+ * NEC NL8048HL11 Panel driver
+ *
+ * Copyright (C) 2010 Texas Instruments Inc.
+ * Author: Erik Gilling <konkers@android.com>
+ * Converted to new DSS device model: 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 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/fb.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.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 omap_video_timings videomode;
+
+ int data_lines;
+
+ int res_gpio;
+ int qvga_gpio;
+
+ struct spi_device *spi;
+};
+
+#define LCD_XRES 800
+#define LCD_YRES 480
+/*
+ * NEC PIX Clock Ratings
+ * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
+ */
+#define LCD_PIXEL_CLOCK 23800000
+
+static const struct {
+ unsigned char addr;
+ unsigned char dat;
+} nec_8048_init_seq[] = {
+ { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
+ { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
+ { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
+ { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
+ { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
+ { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
+ { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
+ { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
+ { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
+ { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
+ { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
+ { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
+ { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
+ { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
+ { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
+ { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
+ { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
+ { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
+};
+
+static const struct omap_video_timings nec_8048_panel_timings = {
+ .x_res = LCD_XRES,
+ .y_res = LCD_YRES,
+ .pixelclock = LCD_PIXEL_CLOCK,
+ .hfp = 6,
+ .hsw = 1,
+ .hbp = 4,
+ .vfp = 3,
+ .vsw = 1,
+ .vbp = 4,
+
+ .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_RISING_EDGE,
+};
+
+#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
+
+static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
+ unsigned char reg_data)
+{
+ int ret = 0;
+ unsigned int cmd = 0, data = 0;
+
+ cmd = 0x0000 | reg_addr; /* register address write */
+ data = 0x0100 | reg_data; /* register data write */
+ data = (cmd << 16) | data;
+
+ ret = spi_write(spi, (unsigned char *)&data, 4);
+ if (ret)
+ pr_err("error in spi_write %x\n", data);
+
+ return ret;
+}
+
+static int init_nec_8048_wvga_lcd(struct spi_device *spi)
+{
+ unsigned int i;
+ /* Initialization Sequence */
+ /* nec_8048_spi_send(spi, REG, VAL) */
+ for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
+ nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
+ nec_8048_init_seq[i].dat);
+ udelay(20);
+ nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
+ nec_8048_init_seq[i].dat);
+ return 0;
+}
+
+static int nec_8048_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 nec_8048_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 nec_8048_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);
+
+ r = in->ops.dpi->enable(in);
+ if (r)
+ return r;
+
+ if (gpio_is_valid(ddata->res_gpio))
+ gpio_set_value_cansleep(ddata->res_gpio, 1);
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ return 0;
+}
+
+static void nec_8048_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 (gpio_is_valid(ddata->res_gpio))
+ gpio_set_value_cansleep(ddata->res_gpio, 0);
+
+ in->ops.dpi->disable(in);
+
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static void nec_8048_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 nec_8048_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 nec_8048_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 nec_8048_ops = {
+ .connect = nec_8048_connect,
+ .disconnect = nec_8048_disconnect,
+
+ .enable = nec_8048_enable,
+ .disable = nec_8048_disable,
+
+ .set_timings = nec_8048_set_timings,
+ .get_timings = nec_8048_get_timings,
+ .check_timings = nec_8048_check_timings,
+
+ .get_resolution = omapdss_default_get_resolution,
+};
+
+
+static int nec_8048_probe_pdata(struct spi_device *spi)
+{
+ const struct panel_nec_nl8048hl11_platform_data *pdata;
+ struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+ struct omap_dss_device *dssdev, *in;
+
+ pdata = dev_get_platdata(&spi->dev);
+
+ ddata->qvga_gpio = pdata->qvga_gpio;
+ ddata->res_gpio = pdata->res_gpio;
+
+ in = omap_dss_find_output(pdata->source);
+ if (in == NULL) {
+ dev_err(&spi->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;
+
+ return 0;
+}
+
+static int nec_8048_probe_of(struct spi_device *spi)
+{
+ struct device_node *node = spi->dev.of_node;
+ struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+ struct omap_dss_device *in;
+ int gpio;
+
+ gpio = of_get_named_gpio(node, "reset-gpios", 0);
+ if (!gpio_is_valid(gpio)) {
+ dev_err(&spi->dev, "failed to parse enable gpio\n");
+ return gpio;
+ }
+ ddata->res_gpio = gpio;
+
+ /* XXX the panel spec doesn't mention any QVGA pin?? */
+ ddata->qvga_gpio = -ENOENT;
+
+ in = omapdss_of_find_source_for_first_ep(node);
+ if (IS_ERR(in)) {
+ dev_err(&spi->dev, "failed to find video source\n");
+ return PTR_ERR(in);
+ }
+
+ ddata->in = in;
+
+ return 0;
+}
+
+static int nec_8048_probe(struct spi_device *spi)
+{
+ struct panel_drv_data *ddata;
+ struct omap_dss_device *dssdev;
+ int r;
+
+ dev_dbg(&spi->dev, "%s\n", __func__);
+
+ spi->mode = SPI_MODE_0;
+ spi->bits_per_word = 32;
+
+ r = spi_setup(spi);
+ if (r < 0) {
+ dev_err(&spi->dev, "spi_setup failed: %d\n", r);
+ return r;
+ }
+
+ init_nec_8048_wvga_lcd(spi);
+
+ ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
+ if (ddata == NULL)
+ return -ENOMEM;
+
+ dev_set_drvdata(&spi->dev, ddata);
+
+ ddata->spi = spi;
+
+ if (dev_get_platdata(&spi->dev)) {
+ r = nec_8048_probe_pdata(spi);
+ if (r)
+ return r;
+ } else if (spi->dev.of_node) {
+ r = nec_8048_probe_of(spi);
+ if (r)
+ return r;
+ } else {
+ return -ENODEV;
+ }
+
+ if (gpio_is_valid(ddata->qvga_gpio)) {
+ r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio,
+ GPIOF_OUT_INIT_HIGH, "lcd QVGA");
+ if (r)
+ goto err_gpio;
+ }
+
+ if (gpio_is_valid(ddata->res_gpio)) {
+ r = devm_gpio_request_one(&spi->dev, ddata->res_gpio,
+ GPIOF_OUT_INIT_LOW, "lcd RES");
+ if (r)
+ goto err_gpio;
+ }
+
+ ddata->videomode = nec_8048_panel_timings;
+
+ dssdev = &ddata->dssdev;
+ dssdev->dev = &spi->dev;
+ dssdev->driver = &nec_8048_ops;
+ dssdev->type = OMAP_DISPLAY_TYPE_DPI;
+ dssdev->owner = THIS_MODULE;
+ dssdev->panel.timings = ddata->videomode;
+
+ r = omapdss_register_display(dssdev);
+ if (r) {
+ dev_err(&spi->dev, "Failed to register panel\n");
+ goto err_reg;
+ }
+
+ return 0;
+
+err_reg:
+err_gpio:
+ omap_dss_put_device(ddata->in);
+ return r;
+}
+
+static int nec_8048_remove(struct spi_device *spi)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
+ struct omap_dss_device *dssdev = &ddata->dssdev;
+ struct omap_dss_device *in = ddata->in;
+
+ dev_dbg(&ddata->spi->dev, "%s\n", __func__);
+
+ omapdss_unregister_display(dssdev);
+
+ nec_8048_disable(dssdev);
+ nec_8048_disconnect(dssdev);
+
+ omap_dss_put_device(in);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int nec_8048_suspend(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+
+ nec_8048_spi_send(spi, 2, 0x01);
+ mdelay(40);
+
+ return 0;
+}
+
+static int nec_8048_resume(struct device *dev)
+{
+ struct spi_device *spi = to_spi_device(dev);
+
+ /* reinitialize the panel */
+ spi_setup(spi);
+ nec_8048_spi_send(spi, 2, 0x00);
+ init_nec_8048_wvga_lcd(spi);
+
+ return 0;
+}
+static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
+ nec_8048_resume);
+#define NEC_8048_PM_OPS (&nec_8048_pm_ops)
+#else
+#define NEC_8048_PM_OPS NULL
+#endif
+
+static const struct of_device_id nec_8048_of_match[] = {
+ { .compatible = "omapdss,nec,nl8048hl11", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, nec_8048_of_match);
+
+static struct spi_driver nec_8048_driver = {
+ .driver = {
+ .name = "panel-nec-nl8048hl11",
+ .owner = THIS_MODULE,
+ .pm = NEC_8048_PM_OPS,
+ .of_match_table = nec_8048_of_match,
+ .suppress_bind_attrs = true,
+ },
+ .probe = nec_8048_probe,
+ .remove = nec_8048_remove,
+};
+
+module_spi_driver(nec_8048_driver);
+
+MODULE_ALIAS("spi:nec,nl8048hl11");
+MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
+MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff