diff options
Diffstat (limited to 'drivers/video/omap2/displays/panel-tpo-td043mtea1.c')
| -rw-r--r-- | drivers/video/omap2/displays/panel-tpo-td043mtea1.c | 596 |
1 files changed, 0 insertions, 596 deletions
diff --git a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c b/drivers/video/omap2/displays/panel-tpo-td043mtea1.c deleted file mode 100644 index 7729b6fa6f97..000000000000 --- a/drivers/video/omap2/displays/panel-tpo-td043mtea1.c +++ /dev/null @@ -1,596 +0,0 @@ -/* - * 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 <linux/slab.h> - -#include <video/omapdss.h> -#include <video/omap-panel-data.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] = { - 105, 315, 381, 431, 490, 537, 579, 686, 780, 837, 880, 1023 -}; - -struct tpo_td043_device { - struct spi_device *spi; - struct regulator *vcc_reg; - int nreset_gpio; - u16 gamma[12]; - u32 mode; - u32 hmirror:1; - u32 vmirror:1; - u32 powered_on:1; - u32 spi_suspended:1; - u32 power_on_resume:1; -}; - -/* used to pass spi_device from SPI to DSS portion of the driver */ -static struct tpo_td043_device *g_tpo_td043; - -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); - int val; - int ret; - - ret = kstrtoint(buf, 0, &val); - if (ret < 0) - return ret; - - val = !!val; - - 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 = kstrtol(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, - - .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, - .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, - .data_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE, - .de_level = OMAPDSS_SIG_ACTIVE_HIGH, - .sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES, -}; - -static inline struct panel_tpo_td043_data -*get_panel_data(const struct omap_dss_device *dssdev) -{ - return (struct panel_tpo_td043_data *) dssdev->data; -} - -static int tpo_td043_power_on(struct tpo_td043_device *tpo_td043) -{ - int r; - - if (tpo_td043->powered_on) - return 0; - - r = regulator_enable(tpo_td043->vcc_reg); - if (r != 0) - return r; - - /* wait for panel to stabilize */ - msleep(160); - - if (gpio_is_valid(tpo_td043->nreset_gpio)) - gpio_set_value(tpo_td043->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); - - tpo_td043->powered_on = 1; - return 0; -} - -static void tpo_td043_power_off(struct tpo_td043_device *tpo_td043) -{ - if (!tpo_td043->powered_on) - return; - - tpo_td043_write(tpo_td043->spi, 3, - TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM); - - if (gpio_is_valid(tpo_td043->nreset_gpio)) - gpio_set_value(tpo_td043->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); - - tpo_td043->powered_on = 0; -} - -static int tpo_td043_enable_dss(struct omap_dss_device *dssdev) -{ - struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev); - int r; - - if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) - return 0; - - omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings); - omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines); - - r = omapdss_dpi_display_enable(dssdev); - if (r) - goto err0; - - /* - * If we are resuming from system suspend, SPI clocks might not be - * enabled yet, so we'll program the LCD from SPI PM resume callback. - */ - if (!tpo_td043->spi_suspended) { - r = tpo_td043_power_on(tpo_td043); - if (r) - goto err1; - } - - dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; - - return 0; -err1: - omapdss_dpi_display_disable(dssdev); -err0: - return r; -} - -static void tpo_td043_disable_dss(struct omap_dss_device *dssdev) -{ - struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dssdev->dev); - - if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) - return; - - omapdss_dpi_display_disable(dssdev); - - if (!tpo_td043->spi_suspended) - tpo_td043_power_off(tpo_td043); -} - -static int tpo_td043_enable(struct omap_dss_device *dssdev) -{ - dev_dbg(dssdev->dev, "enable\n"); - - return tpo_td043_enable_dss(dssdev); -} - -static void tpo_td043_disable(struct omap_dss_device *dssdev) -{ - dev_dbg(dssdev->dev, "disable\n"); - - tpo_td043_disable_dss(dssdev); - - dssdev->state = OMAP_DSS_DISPLAY_DISABLED; -} - -static int tpo_td043_probe(struct omap_dss_device *dssdev) -{ - struct tpo_td043_device *tpo_td043 = g_tpo_td043; - struct panel_tpo_td043_data *pdata = get_panel_data(dssdev); - int ret = 0; - - dev_dbg(dssdev->dev, "probe\n"); - - if (tpo_td043 == NULL) { - dev_err(dssdev->dev, "missing tpo_td043_device\n"); - return -ENODEV; - } - - if (!pdata) - return -EINVAL; - - tpo_td043->nreset_gpio = pdata->nreset_gpio; - - 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(tpo_td043->nreset_gpio)) { - ret = devm_gpio_request_one(dssdev->dev, - tpo_td043->nreset_gpio, GPIOF_OUT_INIT_LOW, - "lcd reset"); - if (ret < 0) { - dev_err(dssdev->dev, "couldn't request reset GPIO\n"); - goto fail_gpio_req; - } - } - - ret = sysfs_create_group(&dssdev->dev->kobj, &tpo_td043_attr_group); - if (ret) - dev_warn(dssdev->dev, "failed to create sysfs files\n"); - - dev_set_drvdata(dssdev->dev, tpo_td043); - - return 0; - -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); - - dev_dbg(dssdev->dev, "remove\n"); - - sysfs_remove_group(&dssdev->dev->kobj, &tpo_td043_attr_group); - regulator_put(tpo_td043->vcc_reg); -} - -static void tpo_td043_set_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - omapdss_dpi_set_timings(dssdev, timings); - - dssdev->panel.timings = *timings; -} - -static int tpo_td043_check_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - return dpi_check_timings(dssdev, timings); -} - -static struct omap_dss_driver tpo_td043_driver = { - .probe = tpo_td043_probe, - .remove = tpo_td043_remove, - - .enable = tpo_td043_enable, - .disable = tpo_td043_disable, - .set_mirror = tpo_td043_set_hmirror, - .get_mirror = tpo_td043_get_hmirror, - - .set_timings = tpo_td043_set_timings, - .check_timings = tpo_td043_check_timings, - - .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; - } - - if (g_tpo_td043 != NULL) - return -EBUSY; - - 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); - g_tpo_td043 = tpo_td043; - - omap_dss_register_driver(&tpo_td043_driver); - - return 0; -} - -static int 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); - g_tpo_td043 = NULL; - - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int tpo_td043_spi_suspend(struct device *dev) -{ - struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev); - - dev_dbg(dev, "tpo_td043_spi_suspend, tpo %p\n", tpo_td043); - - tpo_td043->power_on_resume = tpo_td043->powered_on; - tpo_td043_power_off(tpo_td043); - tpo_td043->spi_suspended = 1; - - return 0; -} - -static int tpo_td043_spi_resume(struct device *dev) -{ - struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev); - int ret; - - dev_dbg(dev, "tpo_td043_spi_resume\n"); - - if (tpo_td043->power_on_resume) { - ret = tpo_td043_power_on(tpo_td043); - if (ret) - return ret; - } - tpo_td043->spi_suspended = 0; - - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(tpo_td043_spi_pm, - tpo_td043_spi_suspend, tpo_td043_spi_resume); - -static struct spi_driver tpo_td043_spi_driver = { - .driver = { - .name = "tpo_td043mtea1_panel_spi", - .owner = THIS_MODULE, - .pm = &tpo_td043_spi_pm, - }, - .probe = tpo_td043_spi_probe, - .remove = tpo_td043_spi_remove, -}; - -module_spi_driver(tpo_td043_spi_driver); - -MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>"); -MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver"); -MODULE_LICENSE("GPL"); |