diff options
Diffstat (limited to 'drivers/video/omap2/displays/panel-acx565akm.c')
| -rw-r--r-- | drivers/video/omap2/displays/panel-acx565akm.c | 798 |
1 files changed, 0 insertions, 798 deletions
diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c deleted file mode 100644 index 3fd100fc853..00000000000 --- a/drivers/video/omap2/displays/panel-acx565akm.c +++ /dev/null @@ -1,798 +0,0 @@ -/* - * Support for ACX565AKM LCD Panel used on Nokia N900 - * - * Copyright (C) 2010 Nokia Corporation - * - * Original Driver Author: Imre Deak <imre.deak@nokia.com> - * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com> - * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.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/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/delay.h> -#include <linux/spi/spi.h> -#include <linux/jiffies.h> -#include <linux/sched.h> -#include <linux/backlight.h> -#include <linux/fb.h> -#include <linux/gpio.h> - -#include <video/omapdss.h> -#include <video/omap-panel-data.h> - -#define MIPID_CMD_READ_DISP_ID 0x04 -#define MIPID_CMD_READ_RED 0x06 -#define MIPID_CMD_READ_GREEN 0x07 -#define MIPID_CMD_READ_BLUE 0x08 -#define MIPID_CMD_READ_DISP_STATUS 0x09 -#define MIPID_CMD_RDDSDR 0x0F -#define MIPID_CMD_SLEEP_IN 0x10 -#define MIPID_CMD_SLEEP_OUT 0x11 -#define MIPID_CMD_DISP_OFF 0x28 -#define MIPID_CMD_DISP_ON 0x29 -#define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51 -#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52 -#define MIPID_CMD_WRITE_CTRL_DISP 0x53 - -#define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5) -#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4) -#define CTRL_DISP_BACKLIGHT_ON (1 << 2) -#define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1) - -#define MIPID_CMD_READ_CTRL_DISP 0x54 -#define MIPID_CMD_WRITE_CABC 0x55 -#define MIPID_CMD_READ_CABC 0x56 - -#define MIPID_VER_LPH8923 3 -#define MIPID_VER_LS041Y3 4 -#define MIPID_VER_L4F00311 8 -#define MIPID_VER_ACX565AKM 9 - -struct acx565akm_device { - char *name; - int enabled; - int model; - int revision; - u8 display_id[3]; - unsigned has_bc:1; - unsigned has_cabc:1; - unsigned cabc_mode; - unsigned long hw_guard_end; /* next value of jiffies - when we can issue the - next sleep in/out command */ - unsigned long hw_guard_wait; /* max guard time in jiffies */ - - struct spi_device *spi; - struct mutex mutex; - - struct omap_dss_device *dssdev; - struct backlight_device *bl_dev; -}; - -static struct acx565akm_device acx_dev; -static int acx565akm_bl_update_status(struct backlight_device *dev); - -/*--------------------MIPID interface-----------------------------*/ - -static void acx565akm_transfer(struct acx565akm_device *md, int cmd, - const u8 *wbuf, int wlen, u8 *rbuf, int rlen) -{ - struct spi_message m; - struct spi_transfer *x, xfer[5]; - int r; - - BUG_ON(md->spi == NULL); - - spi_message_init(&m); - - memset(xfer, 0, sizeof(xfer)); - x = &xfer[0]; - - cmd &= 0xff; - x->tx_buf = &cmd; - x->bits_per_word = 9; - x->len = 2; - - if (rlen > 1 && wlen == 0) { - /* - * Between the command and the response data there is a - * dummy clock cycle. Add an extra bit after the command - * word to account for this. - */ - x->bits_per_word = 10; - cmd <<= 1; - } - spi_message_add_tail(x, &m); - - if (wlen) { - x++; - x->tx_buf = wbuf; - x->len = wlen; - x->bits_per_word = 9; - spi_message_add_tail(x, &m); - } - - if (rlen) { - x++; - x->rx_buf = rbuf; - x->len = rlen; - spi_message_add_tail(x, &m); - } - - r = spi_sync(md->spi, &m); - if (r < 0) - dev_dbg(&md->spi->dev, "spi_sync %d\n", r); -} - -static inline void acx565akm_cmd(struct acx565akm_device *md, int cmd) -{ - acx565akm_transfer(md, cmd, NULL, 0, NULL, 0); -} - -static inline void acx565akm_write(struct acx565akm_device *md, - int reg, const u8 *buf, int len) -{ - acx565akm_transfer(md, reg, buf, len, NULL, 0); -} - -static inline void acx565akm_read(struct acx565akm_device *md, - int reg, u8 *buf, int len) -{ - acx565akm_transfer(md, reg, NULL, 0, buf, len); -} - -static void hw_guard_start(struct acx565akm_device *md, int guard_msec) -{ - md->hw_guard_wait = msecs_to_jiffies(guard_msec); - md->hw_guard_end = jiffies + md->hw_guard_wait; -} - -static void hw_guard_wait(struct acx565akm_device *md) -{ - unsigned long wait = md->hw_guard_end - jiffies; - - if ((long)wait > 0 && wait <= md->hw_guard_wait) { - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(wait); - } -} - -/*----------------------MIPID wrappers----------------------------*/ - -static void set_sleep_mode(struct acx565akm_device *md, int on) -{ - int cmd; - - if (on) - cmd = MIPID_CMD_SLEEP_IN; - else - cmd = MIPID_CMD_SLEEP_OUT; - /* - * We have to keep 120msec between sleep in/out commands. - * (8.2.15, 8.2.16). - */ - hw_guard_wait(md); - acx565akm_cmd(md, cmd); - hw_guard_start(md, 120); -} - -static void set_display_state(struct acx565akm_device *md, int enabled) -{ - int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF; - - acx565akm_cmd(md, cmd); -} - -static int panel_enabled(struct acx565akm_device *md) -{ - u32 disp_status; - int enabled; - - acx565akm_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4); - disp_status = __be32_to_cpu(disp_status); - enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10)); - dev_dbg(&md->spi->dev, - "LCD panel %senabled by bootloader (status 0x%04x)\n", - enabled ? "" : "not ", disp_status); - return enabled; -} - -static int panel_detect(struct acx565akm_device *md) -{ - acx565akm_read(md, MIPID_CMD_READ_DISP_ID, md->display_id, 3); - dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n", - md->display_id[0], md->display_id[1], md->display_id[2]); - - switch (md->display_id[0]) { - case 0x10: - md->model = MIPID_VER_ACX565AKM; - md->name = "acx565akm"; - md->has_bc = 1; - md->has_cabc = 1; - break; - case 0x29: - md->model = MIPID_VER_L4F00311; - md->name = "l4f00311"; - break; - case 0x45: - md->model = MIPID_VER_LPH8923; - md->name = "lph8923"; - break; - case 0x83: - md->model = MIPID_VER_LS041Y3; - md->name = "ls041y3"; - break; - default: - md->name = "unknown"; - dev_err(&md->spi->dev, "invalid display ID\n"); - return -ENODEV; - } - - md->revision = md->display_id[1]; - - dev_info(&md->spi->dev, "omapfb: %s rev %02x LCD detected\n", - md->name, md->revision); - - return 0; -} - -/*----------------------Backlight Control-------------------------*/ - -static void enable_backlight_ctrl(struct acx565akm_device *md, int enable) -{ - u16 ctrl; - - acx565akm_read(md, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1); - if (enable) { - ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON | - CTRL_DISP_BACKLIGHT_ON; - } else { - ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON | - CTRL_DISP_BACKLIGHT_ON); - } - - ctrl |= 1 << 8; - acx565akm_write(md, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2); -} - -static void set_cabc_mode(struct acx565akm_device *md, unsigned mode) -{ - u16 cabc_ctrl; - - md->cabc_mode = mode; - if (!md->enabled) - return; - cabc_ctrl = 0; - acx565akm_read(md, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1); - cabc_ctrl &= ~3; - cabc_ctrl |= (1 << 8) | (mode & 3); - acx565akm_write(md, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2); -} - -static unsigned get_cabc_mode(struct acx565akm_device *md) -{ - return md->cabc_mode; -} - -static unsigned get_hw_cabc_mode(struct acx565akm_device *md) -{ - u8 cabc_ctrl; - - acx565akm_read(md, MIPID_CMD_READ_CABC, &cabc_ctrl, 1); - return cabc_ctrl & 3; -} - -static void acx565akm_set_brightness(struct acx565akm_device *md, int level) -{ - int bv; - - bv = level | (1 << 8); - acx565akm_write(md, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2); - - if (level) - enable_backlight_ctrl(md, 1); - else - enable_backlight_ctrl(md, 0); -} - -static int acx565akm_get_actual_brightness(struct acx565akm_device *md) -{ - u8 bv; - - acx565akm_read(md, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1); - - return bv; -} - - -static int acx565akm_bl_update_status(struct backlight_device *dev) -{ - struct acx565akm_device *md = dev_get_drvdata(&dev->dev); - int r; - int level; - - dev_dbg(&md->spi->dev, "%s\n", __func__); - - mutex_lock(&md->mutex); - - if (dev->props.fb_blank == FB_BLANK_UNBLANK && - dev->props.power == FB_BLANK_UNBLANK) - level = dev->props.brightness; - else - level = 0; - - r = 0; - if (md->has_bc) - acx565akm_set_brightness(md, level); - else - r = -ENODEV; - - mutex_unlock(&md->mutex); - - return r; -} - -static int acx565akm_bl_get_intensity(struct backlight_device *dev) -{ - struct acx565akm_device *md = dev_get_drvdata(&dev->dev); - - dev_dbg(&dev->dev, "%s\n", __func__); - - if (!md->has_bc) - return -ENODEV; - - if (dev->props.fb_blank == FB_BLANK_UNBLANK && - dev->props.power == FB_BLANK_UNBLANK) { - if (md->has_bc) - return acx565akm_get_actual_brightness(md); - else - return dev->props.brightness; - } - - return 0; -} - -static const struct backlight_ops acx565akm_bl_ops = { - .get_brightness = acx565akm_bl_get_intensity, - .update_status = acx565akm_bl_update_status, -}; - -/*--------------------Auto Brightness control via Sysfs---------------------*/ - -static const char *cabc_modes[] = { - "off", /* always used when CABC is not supported */ - "ui", - "still-image", - "moving-image", -}; - -static ssize_t show_cabc_mode(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct acx565akm_device *md = dev_get_drvdata(dev); - const char *mode_str; - int mode; - int len; - - if (!md->has_cabc) - mode = 0; - else - mode = get_cabc_mode(md); - mode_str = "unknown"; - if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes)) - mode_str = cabc_modes[mode]; - len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str); - - return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1; -} - -static ssize_t store_cabc_mode(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct acx565akm_device *md = dev_get_drvdata(dev); - int i; - - for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) { - const char *mode_str = cabc_modes[i]; - int cmp_len = strlen(mode_str); - - if (count > 0 && buf[count - 1] == '\n') - count--; - if (count != cmp_len) - continue; - - if (strncmp(buf, mode_str, cmp_len) == 0) - break; - } - - if (i == ARRAY_SIZE(cabc_modes)) - return -EINVAL; - - if (!md->has_cabc && i != 0) - return -EINVAL; - - mutex_lock(&md->mutex); - set_cabc_mode(md, i); - mutex_unlock(&md->mutex); - - return count; -} - -static ssize_t show_cabc_available_modes(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct acx565akm_device *md = dev_get_drvdata(dev); - int len; - int i; - - if (!md->has_cabc) - return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]); - - for (i = 0, len = 0; - len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++) - len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s", - i ? " " : "", cabc_modes[i], - i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : ""); - - return len < PAGE_SIZE ? len : PAGE_SIZE - 1; -} - -static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR, - show_cabc_mode, store_cabc_mode); -static DEVICE_ATTR(cabc_available_modes, S_IRUGO, - show_cabc_available_modes, NULL); - -static struct attribute *bldev_attrs[] = { - &dev_attr_cabc_mode.attr, - &dev_attr_cabc_available_modes.attr, - NULL, -}; - -static struct attribute_group bldev_attr_group = { - .attrs = bldev_attrs, -}; - - -/*---------------------------ACX Panel----------------------------*/ - -static int acx_get_recommended_bpp(struct omap_dss_device *dssdev) -{ - return 16; -} - -static struct omap_video_timings acx_panel_timings = { - .x_res = 800, - .y_res = 480, - .pixel_clock = 24000, - .hfp = 28, - .hsw = 4, - .hbp = 24, - .vfp = 3, - .vsw = 3, - .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_OPPOSITE_EDGES, -}; - -static struct panel_acx565akm_data *get_panel_data(struct omap_dss_device *dssdev) -{ - return (struct panel_acx565akm_data *) dssdev->data; -} - -static int acx_panel_probe(struct omap_dss_device *dssdev) -{ - int r; - struct acx565akm_device *md = &acx_dev; - struct panel_acx565akm_data *panel_data = get_panel_data(dssdev); - struct backlight_device *bldev; - int max_brightness, brightness; - struct backlight_properties props; - - dev_dbg(dssdev->dev, "%s\n", __func__); - - if (!panel_data) - return -EINVAL; - - /* FIXME AC bias ? */ - dssdev->panel.timings = acx_panel_timings; - - if (gpio_is_valid(panel_data->reset_gpio)) { - r = devm_gpio_request_one(dssdev->dev, panel_data->reset_gpio, - GPIOF_OUT_INIT_LOW, "lcd reset"); - if (r) - return r; - } - - if (gpio_is_valid(panel_data->reset_gpio)) - gpio_set_value(panel_data->reset_gpio, 1); - - /* - * After reset we have to wait 5 msec before the first - * command can be sent. - */ - msleep(5); - - md->enabled = panel_enabled(md); - - r = panel_detect(md); - if (r) { - dev_err(dssdev->dev, "%s panel detect error\n", __func__); - if (!md->enabled && gpio_is_valid(panel_data->reset_gpio)) - gpio_set_value(panel_data->reset_gpio, 0); - - return r; - } - - mutex_lock(&acx_dev.mutex); - acx_dev.dssdev = dssdev; - mutex_unlock(&acx_dev.mutex); - - if (!md->enabled) { - if (gpio_is_valid(panel_data->reset_gpio)) - gpio_set_value(panel_data->reset_gpio, 0); - } - - /*------- Backlight control --------*/ - - memset(&props, 0, sizeof(props)); - props.fb_blank = FB_BLANK_UNBLANK; - props.power = FB_BLANK_UNBLANK; - props.type = BACKLIGHT_RAW; - - bldev = backlight_device_register("acx565akm", &md->spi->dev, - md, &acx565akm_bl_ops, &props); - md->bl_dev = bldev; - if (md->has_cabc) { - r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group); - if (r) { - dev_err(&bldev->dev, - "%s failed to create sysfs files\n", __func__); - backlight_device_unregister(bldev); - return r; - } - md->cabc_mode = get_hw_cabc_mode(md); - } - - max_brightness = 255; - - if (md->has_bc) - brightness = acx565akm_get_actual_brightness(md); - else - brightness = 0; - - bldev->props.max_brightness = max_brightness; - bldev->props.brightness = brightness; - - acx565akm_bl_update_status(bldev); - return 0; -} - -static void acx_panel_remove(struct omap_dss_device *dssdev) -{ - struct acx565akm_device *md = &acx_dev; - - dev_dbg(dssdev->dev, "%s\n", __func__); - sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group); - backlight_device_unregister(md->bl_dev); - mutex_lock(&acx_dev.mutex); - acx_dev.dssdev = NULL; - mutex_unlock(&acx_dev.mutex); -} - -static int acx_panel_power_on(struct omap_dss_device *dssdev) -{ - struct acx565akm_device *md = &acx_dev; - struct panel_acx565akm_data *panel_data = get_panel_data(dssdev); - int r; - - dev_dbg(dssdev->dev, "%s\n", __func__); - - if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) - return 0; - - mutex_lock(&md->mutex); - - omapdss_sdi_set_timings(dssdev, &dssdev->panel.timings); - omapdss_sdi_set_datapairs(dssdev, dssdev->phy.sdi.datapairs); - - r = omapdss_sdi_display_enable(dssdev); - if (r) { - pr_err("%s sdi enable failed\n", __func__); - goto fail_unlock; - } - - /*FIXME tweak me */ - msleep(50); - - if (gpio_is_valid(panel_data->reset_gpio)) - gpio_set_value(panel_data->reset_gpio, 1); - - if (md->enabled) { - dev_dbg(&md->spi->dev, "panel already enabled\n"); - mutex_unlock(&md->mutex); - return 0; - } - - /* - * We have to meet all the following delay requirements: - * 1. tRW: reset pulse width 10usec (7.12.1) - * 2. tRT: reset cancel time 5msec (7.12.1) - * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst - * case (7.6.2) - * 4. 120msec before the sleep out command (7.12.1) - */ - msleep(120); - - set_sleep_mode(md, 0); - md->enabled = 1; - - /* 5msec between sleep out and the next command. (8.2.16) */ - msleep(5); - set_display_state(md, 1); - set_cabc_mode(md, md->cabc_mode); - - mutex_unlock(&md->mutex); - - return acx565akm_bl_update_status(md->bl_dev); - -fail_unlock: - mutex_unlock(&md->mutex); - return r; -} - -static void acx_panel_power_off(struct omap_dss_device *dssdev) -{ - struct acx565akm_device *md = &acx_dev; - struct panel_acx565akm_data *panel_data = get_panel_data(dssdev); - - dev_dbg(dssdev->dev, "%s\n", __func__); - - if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) - return; - - mutex_lock(&md->mutex); - - if (!md->enabled) { - mutex_unlock(&md->mutex); - return; - } - set_display_state(md, 0); - set_sleep_mode(md, 1); - md->enabled = 0; - /* - * We have to provide PCLK,HS,VS signals for 2 frames (worst case - * ~50msec) after sending the sleep in command and asserting the - * reset signal. We probably could assert the reset w/o the delay - * but we still delay to avoid possible artifacts. (7.6.1) - */ - msleep(50); - - if (gpio_is_valid(panel_data->reset_gpio)) - gpio_set_value(panel_data->reset_gpio, 0); - - /* FIXME need to tweak this delay */ - msleep(100); - - omapdss_sdi_display_disable(dssdev); - - mutex_unlock(&md->mutex); -} - -static int acx_panel_enable(struct omap_dss_device *dssdev) -{ - int r; - - dev_dbg(dssdev->dev, "%s\n", __func__); - r = acx_panel_power_on(dssdev); - - if (r) - return r; - - dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; - return 0; -} - -static void acx_panel_disable(struct omap_dss_device *dssdev) -{ - dev_dbg(dssdev->dev, "%s\n", __func__); - acx_panel_power_off(dssdev); - dssdev->state = OMAP_DSS_DISPLAY_DISABLED; -} - -static void acx_panel_set_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - omapdss_sdi_set_timings(dssdev, timings); - - dssdev->panel.timings = *timings; -} - -static int acx_panel_check_timings(struct omap_dss_device *dssdev, - struct omap_video_timings *timings) -{ - return 0; -} - - -static struct omap_dss_driver acx_panel_driver = { - .probe = acx_panel_probe, - .remove = acx_panel_remove, - - .enable = acx_panel_enable, - .disable = acx_panel_disable, - - .set_timings = acx_panel_set_timings, - .check_timings = acx_panel_check_timings, - - .get_recommended_bpp = acx_get_recommended_bpp, - - .driver = { - .name = "panel-acx565akm", - .owner = THIS_MODULE, - }, -}; - -/*--------------------SPI probe-------------------------*/ - -static int acx565akm_spi_probe(struct spi_device *spi) -{ - struct acx565akm_device *md = &acx_dev; - - dev_dbg(&spi->dev, "%s\n", __func__); - - spi->mode = SPI_MODE_3; - md->spi = spi; - mutex_init(&md->mutex); - dev_set_drvdata(&spi->dev, md); - - omap_dss_register_driver(&acx_panel_driver); - - return 0; -} - -static int acx565akm_spi_remove(struct spi_device *spi) -{ - struct acx565akm_device *md = dev_get_drvdata(&spi->dev); - - dev_dbg(&md->spi->dev, "%s\n", __func__); - omap_dss_unregister_driver(&acx_panel_driver); - - return 0; -} - -static struct spi_driver acx565akm_spi_driver = { - .driver = { - .name = "acx565akm", - .owner = THIS_MODULE, - }, - .probe = acx565akm_spi_probe, - .remove = acx565akm_spi_remove, -}; - -module_spi_driver(acx565akm_spi_driver); - -MODULE_AUTHOR("Nokia Corporation"); -MODULE_DESCRIPTION("acx565akm LCD Driver"); -MODULE_LICENSE("GPL"); |