--- /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 version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/gpio.h>
+
+#include <mach/display.h>
+
+#define TPO_R02_MODE(x) ((x) & 7)
+#define TPO_R02_NCLK_RISING (1 << 3)
+#define TPO_R02_HSYNC_HIGH (1 << 4)
+#define TPO_R02_VSYNC_HIGH (1 << 5)
+
+#define TPO_R03_NSTANDBY (1 << 0)
+#define TPO_R03_EN_CP_CLK (1 << 1)
+#define TPO_R03_EN_VGL_PUMP (1 << 2)
+#define TPO_R03_EN_PWM (1 << 3)
+#define TPO_R03_DRIVING_CAP_100 (1 << 4)
+#define TPO_R03_EN_PRE_CHARGE (1 << 6)
+#define TPO_R03_SOFTWARE_CTL (1 << 7)
+
+#define TPO_R04_NFLIP_H (1 << 0)
+#define TPO_R04_NFLIP_V (1 << 1)
+#define TPO_R04_CP_CLK_FREQ_1H (1 << 2)
+#define TPO_R04_VGL_FREQ_1H (1 << 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_EN_PWM | 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;
+ int mirror;
+ int mode;
+ u16 gamma[12];
+};
+
+static void 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);
+}
+
+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_panel_init(struct omap_display *display)
+{
+ int nreset_gpio = display->hw_config.panel_reset_gpio;
+ int ret = 0;
+
+ if (gpio_is_valid(nreset_gpio)) {
+ ret = gpio_request(nreset_gpio, "lcd reset");
+ if (ret < 0) {
+ pr_err("tpo_td043: couldn't request reset GPIO\n");
+ return ret;
+ }
+
+ ret = gpio_direction_output(nreset_gpio, 0);
+ if (ret < 0)
+ pr_err("tpo_td043: couldn't set GPIO direction\n");
+ }
+
+ return ret;
+}
+
+static int tpo_td043_panel_enable(struct omap_display *display)
+{
+ struct tpo_td043_device *tpo_td043 = display->panel->priv;
+ int nreset_gpio = display->hw_config.panel_reset_gpio;
+ int ret;
+
+ if (display->hw_config.panel_enable) {
+ ret = display->hw_config.panel_enable(display);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* 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, 4, (tpo_td043->mirror ^ 3) |
+ TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H);
+ tpo_td043_write(tpo_td043->spi, 0x20, 0xf0);
+ tpo_td043_write(tpo_td043->spi, 0x21, 0xf0);
+ tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma);
+
+ return 0;
+}
+
+static void tpo_td043_panel_disable(struct omap_display *display)
+{
+ struct tpo_td043_device *tpo_td043 = display->panel->priv;
+ int nreset_gpio = display->hw_config.panel_reset_gpio;
+
+ 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);
+
+ if (display->hw_config.panel_disable)
+ display->hw_config.panel_disable(display);
+}
+
+static int tpo_td043_panel_suspend(struct omap_display *display)
+{
+ tpo_td043_panel_disable(display);
+ return 0;
+}
+
+static int tpo_td043_panel_resume(struct omap_display *display)
+{
+ return tpo_td043_panel_enable(display);
+}
+
+static void tpo_td043_panel_cleanup(struct omap_display *display)
+{
+ int nreset_gpio = display->hw_config.panel_reset_gpio;
+
+ if (gpio_is_valid(nreset_gpio))
+ gpio_free(nreset_gpio);
+}
+
+static struct omap_panel tpo_td043_panel = {
+ .owner = THIS_MODULE,
+ .name = "tpo-td043mtea1",
+ .init = tpo_td043_panel_init,
+ .enable = tpo_td043_panel_enable,
+ .disable = tpo_td043_panel_disable,
+ .suspend = tpo_td043_panel_suspend,
+ .resume = tpo_td043_panel_resume,
+ .cleanup = tpo_td043_panel_cleanup,
+
+ .timings = {
+ .x_res = 800,
+ .y_res = 480,
+
+ .pixel_clock = 36000,
+
+ .hsw = 1,
+ .hfp = 68,
+ .hbp = 214,
+
+ .vsw = 1,
+ .vfp = 39,
+ .vbp = 34,
+ },
+
+ .config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IHS |
+ OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IPC,
+};
+
+static ssize_t tpo_td043_mirror_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->mirror);
+}
+
+static ssize_t tpo_td043_mirror_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;
+
+ val = simple_strtol(buf, NULL, 0);
+ if (val & ~3)
+ return -EINVAL;
+
+ tpo_td043->mirror = val;
+
+ val ^= 3;
+ val |= TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
+ tpo_td043_write(tpo_td043->spi, 4, 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;
+
+ val = simple_strtol(buf, NULL, 0);
+ if (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 ssize_t tpo_td043_reg_write(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
+ unsigned long reg, val;
+ int ret;
+
+ ret = sscanf(buf, "%lx %lx", ®, &val);
+ if (ret != 2 || (reg & ~0x3f) || (val & ~0xff))
+ return -EINVAL;
+
+ tpo_td043_write(tpo_td043->spi, reg, val);
+
+ return count;
+}
+
+static DEVICE_ATTR(mirror, 0664, tpo_td043_mirror_show, tpo_td043_mirror_store);
+static DEVICE_ATTR(mode, 0664, tpo_td043_mode_show, tpo_td043_mode_store);
+static DEVICE_ATTR(gamma, 0664, tpo_td043_gamma_show, tpo_td043_gamma_store);
+static DEVICE_ATTR(reg_write, 0200, NULL, tpo_td043_reg_write);
+
+static int tpo_td043_spi_probe(struct spi_device *spi)
+{
+ struct tpo_td043_device *tpo_td043;
+ int ret;
+
+ 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;
+ tpo_td043->mode = 7;
+ memcpy(tpo_td043->gamma, tpo_td043_def_gamma, sizeof(tpo_td043->gamma));
+
+ dev_set_drvdata(&spi->dev, tpo_td043);
+ tpo_td043_panel.priv = tpo_td043;
+
+ omap_dss_register_panel(&tpo_td043_panel);
+
+ ret = device_create_file(&spi->dev, &dev_attr_mirror);
+ ret |= device_create_file(&spi->dev, &dev_attr_mode);
+ ret |= device_create_file(&spi->dev, &dev_attr_gamma);
+ ret |= device_create_file(&spi->dev, &dev_attr_reg_write);
+ if (ret < 0)
+ dev_warn(&spi->dev, "failed to add sysfs file(s)\n");
+
+ return 0;
+}
+
+static int tpo_td043_spi_remove(struct spi_device *spi)
+{
+ struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&spi->dev);
+
+ device_remove_file(&spi->dev, &dev_attr_reg_write);
+ device_remove_file(&spi->dev, &dev_attr_gamma);
+ device_remove_file(&spi->dev, &dev_attr_mode);
+ device_remove_file(&spi->dev, &dev_attr_mirror);
+ omap_dss_unregister_panel(&tpo_td043_panel);
+
+ kfree(tpo_td043);
+
+ return 0;
+}
+
+static struct spi_driver tpo_td043_spi_driver = {
+ .driver = {
+ .name = "panel-tpo-td043mtea1",
+ .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