--- /dev/null
+/*
+ * LCD panel driver for TPO TD043MTEA1
+ *
+ * Author: Gražvydas Ignotas <notasas@gmail.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/regulator/consumer.h>
+#include <linux/gpio.h>
+#include <linux/err.h>
+
+#include <plat/display.h>
+
+#define TPO_R02_MODE(x) ((x) & 7)
+#define TPO_R02_MODE_800x480 7
+#define TPO_R02_NCLK_RISING BIT(3)
+#define TPO_R02_HSYNC_HIGH BIT(4)
+#define TPO_R02_VSYNC_HIGH BIT(5)
+
+#define TPO_R03_NSTANDBY BIT(0)
+#define TPO_R03_EN_CP_CLK BIT(1)
+#define TPO_R03_EN_VGL_PUMP BIT(2)
+#define TPO_R03_EN_PWM BIT(3)
+#define TPO_R03_DRIVING_CAP_100 BIT(4)
+#define TPO_R03_EN_PRE_CHARGE BIT(6)
+#define TPO_R03_SOFTWARE_CTL BIT(7)
+
+#define TPO_R04_NFLIP_H BIT(0)
+#define TPO_R04_NFLIP_V BIT(1)
+#define TPO_R04_CP_CLK_FREQ_1H BIT(2)
+#define TPO_R04_VGL_FREQ_1H BIT(4)
+
+#define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \
+ TPO_R03_EN_VGL_PUMP | TPO_R03_EN_PWM | \
+ TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
+ TPO_R03_SOFTWARE_CTL)
+
+#define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \
+ TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)
+
+static const u16 tpo_td043_def_gamma[12] = {
+ 106, 200, 289, 375, 460, 543, 625, 705, 785, 864, 942, 1020
+};
+
+struct tpo_td043_device {
+ struct spi_device *spi;
+ struct regulator *vcc_reg;
+ u16 gamma[12];
+ u32 mode;
+ u32 hmirror:1;
+ u32 vmirror:1;
+};
+
+static int tpo_td043_write(struct spi_device *spi, u8 addr, u8 data)
+{
+ struct spi_message m;
+ struct spi_transfer xfer;
+ u16 w;
+ int r;
+
+ spi_message_init(&m);
+
+ memset(&xfer, 0, sizeof(xfer));
+
+ w = ((u16)addr << 10) | (1 << 8) | data;
+ xfer.tx_buf = &w;
+ xfer.bits_per_word = 16;
+ xfer.len = 2;
+ spi_message_add_tail(&xfer, &m);
+
+ r = spi_sync(spi, &m);
+ if (r < 0)
+ dev_warn(&spi->dev, "failed to write to LCD reg (%d)\n", r);
+ return r;
+}
+
+static void tpo_td043_write_gamma(struct spi_device *spi, u16 gamma[12])
+{
+ u8 i, val;
+
+ /* gamma bits [9:8] */
+ for (val = i = 0; i < 4; i++)
+ val |= (gamma[i] & 0x300) >> ((i + 1) * 2);
+ tpo_td043_write(spi, 0x11, val);
+
+ for (val = i = 0; i < 4; i++)
+ val |= (gamma[i+4] & 0x300) >> ((i + 1) * 2);
+ tpo_td043_write(spi, 0x12, val);
+
+ for (val = i = 0; i < 4; i++)
+ val |= (gamma[i+8] & 0x300) >> ((i + 1) * 2);
+ tpo_td043_write(spi, 0x13, val);
+
+ /* gamma bits [7:0] */
+ for (val = i = 0; i < 12; i++)
+ tpo_td043_write(spi, 0x14 + i, gamma[i] & 0xff);
+}
+
+static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
+{
+ u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V | \
+ TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
+ if (h)
+ reg4 &= ~TPO_R04_NFLIP_H;
+ if (v)
+ reg4 &= ~TPO_R04_NFLIP_V;
+
+ return tpo_td043_write(spi, 4, reg4);
+}
+
+static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+
+ tpo_td043->hmirror = enable;
+ return tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
+ tpo_td043->vmirror);
+}
+
+static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+
+ return tpo_td043->hmirror;
+}
+
+static ssize_t tpo_td043_vmirror_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", tpo_td043->vmirror);
+}
+
+static ssize_t tpo_td043_vmirror_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
+ long val;
+ int ret;
+
+ ret = strict_strtol(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ ret = tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror, val);
+ if (ret < 0)
+ return ret;
+
+ tpo_td043->vmirror = val;
+
+ return count;
+}
+
+static ssize_t tpo_td043_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", tpo_td043->mode);
+}
+
+static ssize_t tpo_td043_mode_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
+ long val;
+ int ret;
+
+ ret = strict_strtol(buf, 0, &val);
+ if (ret != 0 || val & ~7)
+ return -EINVAL;
+
+ tpo_td043->mode = val;
+
+ val |= TPO_R02_NCLK_RISING;
+ tpo_td043_write(tpo_td043->spi, 2, val);
+
+ return count;
+}
+
+static ssize_t tpo_td043_gamma_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
+ ssize_t len = 0;
+ int ret;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tpo_td043->gamma); i++) {
+ ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",
+ tpo_td043->gamma[i]);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ }
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t tpo_td043_gamma_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
+ unsigned int g[12];
+ int ret;
+ int i;
+
+ ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",
+ &g[0], &g[1], &g[2], &g[3], &g[4], &g[5],
+ &g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);
+
+ if (ret != 12)
+ return -EINVAL;
+
+ for (i = 0; i < 12; i++)
+ tpo_td043->gamma[i] = g[i];
+
+ tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma);
+
+ return count;
+}
+
+static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR,
+ tpo_td043_vmirror_show, tpo_td043_vmirror_store);
+static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
+ tpo_td043_mode_show, tpo_td043_mode_store);
+static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR,
+ tpo_td043_gamma_show, tpo_td043_gamma_store);
+
+static struct attribute *tpo_td043_attrs[] = {
+ &dev_attr_vmirror.attr,
+ &dev_attr_mode.attr,
+ &dev_attr_gamma.attr,
+ NULL,
+};
+
+static struct attribute_group tpo_td043_attr_group = {
+ .attrs = tpo_td043_attrs,
+};
+
+static const struct omap_video_timings tpo_td043_timings = {
+ .x_res = 800,
+ .y_res = 480,
+
+ .pixel_clock = 36000,
+
+ .hsw = 1,
+ .hfp = 68,
+ .hbp = 214,
+
+ .vsw = 1,
+ .vfp = 39,
+ .vbp = 34,
+};
+
+static int tpo_td043_enable(struct omap_dss_device *dssdev)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+ int nreset_gpio = dssdev->reset_gpio;
+ int ret;
+
+ dev_dbg(&dssdev->dev, "enable\n");
+
+ if (dssdev->platform_enable) {
+ ret = dssdev->platform_enable(dssdev);
+ if (ret)
+ return ret;
+ }
+
+ regulator_enable(tpo_td043->vcc_reg);
+
+ /* wait for power up */
+ msleep(160);
+
+ if (gpio_is_valid(nreset_gpio))
+ gpio_set_value(nreset_gpio, 1);
+
+ tpo_td043_write(tpo_td043->spi, 2,
+ TPO_R02_MODE(tpo_td043->mode) | TPO_R02_NCLK_RISING);
+ tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_NORMAL);
+ tpo_td043_write(tpo_td043->spi, 0x20, 0xf0);
+ tpo_td043_write(tpo_td043->spi, 0x21, 0xf0);
+ tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
+ tpo_td043->vmirror);
+ tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma);
+
+ return 0;
+}
+
+static void tpo_td043_disable(struct omap_dss_device *dssdev)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+ int nreset_gpio = dssdev->reset_gpio;
+
+ dev_dbg(&dssdev->dev, "disable\n");
+
+ tpo_td043_write(tpo_td043->spi, 3,
+ TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);
+
+ if (gpio_is_valid(nreset_gpio))
+ gpio_set_value(nreset_gpio, 0);
+
+ /* wait for at least 2 vsyncs before cutting off power */
+ msleep(50);
+
+ tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_STANDBY);
+
+ regulator_disable(tpo_td043->vcc_reg);
+
+ if (dssdev->platform_disable)
+ dssdev->platform_disable(dssdev);
+}
+
+static int tpo_td043_suspend(struct omap_dss_device *dssdev)
+{
+ tpo_td043_disable(dssdev);
+ return 0;
+}
+
+static int tpo_td043_resume(struct omap_dss_device *dssdev)
+{
+ return tpo_td043_enable(dssdev);
+}
+
+static int tpo_td043_probe(struct omap_dss_device *dssdev)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+ int nreset_gpio = dssdev->reset_gpio;
+ int ret = 0;
+
+ dev_dbg(&dssdev->dev, "probe\n");
+
+ if (tpo_td043 == NULL) {
+ dev_err(&dssdev->dev, "missing tpo_td043_device\n");
+ return -ENODEV;
+ }
+
+ dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IHS |
+ OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IPC;
+ dssdev->panel.timings = tpo_td043_timings;
+ dssdev->ctrl.pixel_size = 24;
+
+ tpo_td043->mode = TPO_R02_MODE_800x480;
+ memcpy(tpo_td043->gamma, tpo_td043_def_gamma, sizeof(tpo_td043->gamma));
+
+ tpo_td043->vcc_reg = regulator_get(&dssdev->dev, "vcc");
+ if (IS_ERR(tpo_td043->vcc_reg)) {
+ dev_err(&dssdev->dev, "failed to get LCD VCC regulator\n");
+ ret = PTR_ERR(tpo_td043->vcc_reg);
+ goto fail_regulator;
+ }
+
+ if (gpio_is_valid(nreset_gpio)) {
+ ret = gpio_request(nreset_gpio, "lcd reset");
+ if (ret < 0) {
+ dev_err(&dssdev->dev, "couldn't request reset GPIO\n");
+ goto fail_gpio_req;
+ }
+
+ ret = gpio_direction_output(nreset_gpio, 0);
+ if (ret < 0) {
+ dev_err(&dssdev->dev, "couldn't set GPIO direction\n");
+ goto fail_gpio_direction;
+ }
+ }
+
+ ret = sysfs_create_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
+ if (ret)
+ dev_warn(&dssdev->dev, "failed to create sysfs files\n");
+
+ return 0;
+
+fail_gpio_direction:
+ gpio_free(nreset_gpio);
+fail_gpio_req:
+ regulator_put(tpo_td043->vcc_reg);
+fail_regulator:
+ kfree(tpo_td043);
+ return ret;
+}
+
+static void tpo_td043_remove(struct omap_dss_device *dssdev)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
+ int nreset_gpio = dssdev->reset_gpio;
+
+ dev_dbg(&dssdev->dev, "remove\n");
+
+ sysfs_remove_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
+ regulator_put(tpo_td043->vcc_reg);
+ if (gpio_is_valid(nreset_gpio))
+ gpio_free(nreset_gpio);
+}
+
+static struct omap_dss_driver tpo_td043_driver = {
+ .probe = tpo_td043_probe,
+ .remove = tpo_td043_remove,
+
+ .enable = tpo_td043_enable,
+ .disable = tpo_td043_disable,
+ .suspend = tpo_td043_suspend,
+ .resume = tpo_td043_resume,
+ .set_mirror = tpo_td043_set_hmirror,
+ .get_mirror = tpo_td043_get_hmirror,
+
+ .driver = {
+ .name = "tpo_td043mtea1_panel",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int tpo_td043_spi_probe(struct spi_device *spi)
+{
+ struct omap_dss_device *dssdev = spi->dev.platform_data;
+ struct tpo_td043_device *tpo_td043;
+ int ret;
+
+ if (dssdev == NULL) {
+ dev_err(&spi->dev, "missing dssdev\n");
+ return -ENODEV;
+ }
+
+ spi->bits_per_word = 16;
+ spi->mode = SPI_MODE_0;
+
+ ret = spi_setup(spi);
+ if (ret < 0) {
+ dev_err(&spi->dev, "spi_setup failed: %d\n", ret);
+ return ret;
+ }
+
+ tpo_td043 = kzalloc(sizeof(*tpo_td043), GFP_KERNEL);
+ if (tpo_td043 == NULL)
+ return -ENOMEM;
+
+ tpo_td043->spi = spi;
+ dev_set_drvdata(&spi->dev, tpo_td043);
+ dev_set_drvdata(&dssdev->dev, tpo_td043);
+
+ omap_dss_register_driver(&tpo_td043_driver);
+
+ return 0;
+}
+
+static int __devexit tpo_td043_spi_remove(struct spi_device *spi)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&spi->dev);
+
+ omap_dss_unregister_driver(&tpo_td043_driver);
+ kfree(tpo_td043);
+
+ return 0;
+}
+
+static struct spi_driver tpo_td043_spi_driver = {
+ .driver = {
+ .name = "tpo_td043mtea1_panel_spi",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = tpo_td043_spi_probe,
+ .remove = __devexit_p(tpo_td043_spi_remove),
+};
+
+static int __init tpo_td043_init(void)
+{
+ return spi_register_driver(&tpo_td043_spi_driver);
+}
+
+static void __exit tpo_td043_exit(void)
+{
+ spi_unregister_driver(&tpo_td043_spi_driver);
+}
+
+module_init(tpo_td043_init);
+module_exit(tpo_td043_exit);
+
+MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
+MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
+MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / commitdiff