diff options
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.31/drivers/video/display/jbt6k74.c')
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.31/drivers/video/display/jbt6k74.c | 835 |
1 files changed, 0 insertions, 835 deletions
diff --git a/target/linux/s3c24xx/files-2.6.31/drivers/video/display/jbt6k74.c b/target/linux/s3c24xx/files-2.6.31/drivers/video/display/jbt6k74.c deleted file mode 100644 index 87f0d67314..0000000000 --- a/target/linux/s3c24xx/files-2.6.31/drivers/video/display/jbt6k74.c +++ /dev/null @@ -1,835 +0,0 @@ -/* Linux kernel driver for the tpo JBT6K74-AS LCM ASIC - * - * Copyright (C) 2006-2007 by Openmoko, Inc. - * Author: Harald Welte <laforge@openmoko.org>, - * Stefan Schmidt <stefan@openmoko.org> - * Copyright (C) 2008 by Harald Welte <laforge@openmoko.org> - * Copyright (C) 2009 by Lars-Peter Clausen <lars@metafoo.de> - * All rights reserved. - * - * 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. - * - * 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - * - */ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/platform_device.h> -#include <linux/delay.h> -#include <linux/workqueue.h> -#include <linux/jbt6k74.h> -#include <linux/fb.h> -#include <linux/lcd.h> -#include <linux/time.h> - -enum jbt_register { - JBT_REG_SLEEP_IN = 0x10, - JBT_REG_SLEEP_OUT = 0x11, - - JBT_REG_DISPLAY_OFF = 0x28, - JBT_REG_DISPLAY_ON = 0x29, - - JBT_REG_RGB_FORMAT = 0x3a, - JBT_REG_QUAD_RATE = 0x3b, - - JBT_REG_POWER_ON_OFF = 0xb0, - JBT_REG_BOOSTER_OP = 0xb1, - JBT_REG_BOOSTER_MODE = 0xb2, - JBT_REG_BOOSTER_FREQ = 0xb3, - JBT_REG_OPAMP_SYSCLK = 0xb4, - JBT_REG_VSC_VOLTAGE = 0xb5, - JBT_REG_VCOM_VOLTAGE = 0xb6, - JBT_REG_EXT_DISPL = 0xb7, - JBT_REG_OUTPUT_CONTROL = 0xb8, - JBT_REG_DCCLK_DCEV = 0xb9, - JBT_REG_DISPLAY_MODE1 = 0xba, - JBT_REG_DISPLAY_MODE2 = 0xbb, - JBT_REG_DISPLAY_MODE = 0xbc, - JBT_REG_ASW_SLEW = 0xbd, - JBT_REG_DUMMY_DISPLAY = 0xbe, - JBT_REG_DRIVE_SYSTEM = 0xbf, - - JBT_REG_SLEEP_OUT_FR_A = 0xc0, - JBT_REG_SLEEP_OUT_FR_B = 0xc1, - JBT_REG_SLEEP_OUT_FR_C = 0xc2, - JBT_REG_SLEEP_IN_LCCNT_D = 0xc3, - JBT_REG_SLEEP_IN_LCCNT_E = 0xc4, - JBT_REG_SLEEP_IN_LCCNT_F = 0xc5, - JBT_REG_SLEEP_IN_LCCNT_G = 0xc6, - - JBT_REG_GAMMA1_FINE_1 = 0xc7, - JBT_REG_GAMMA1_FINE_2 = 0xc8, - JBT_REG_GAMMA1_INCLINATION = 0xc9, - JBT_REG_GAMMA1_BLUE_OFFSET = 0xca, - - /* VGA */ - JBT_REG_BLANK_CONTROL = 0xcf, - JBT_REG_BLANK_TH_TV = 0xd0, - JBT_REG_CKV_ON_OFF = 0xd1, - JBT_REG_CKV_1_2 = 0xd2, - JBT_REG_OEV_TIMING = 0xd3, - JBT_REG_ASW_TIMING_1 = 0xd4, - JBT_REG_ASW_TIMING_2 = 0xd5, - - /* QVGA */ - JBT_REG_BLANK_CONTROL_QVGA = 0xd6, - JBT_REG_BLANK_TH_TV_QVGA = 0xd7, - JBT_REG_CKV_ON_OFF_QVGA = 0xd8, - JBT_REG_CKV_1_2_QVGA = 0xd9, - JBT_REG_OEV_TIMING_QVGA = 0xde, - JBT_REG_ASW_TIMING_1_QVGA = 0xdf, - JBT_REG_ASW_TIMING_2_QVGA = 0xe0, - - - JBT_REG_HCLOCK_VGA = 0xec, - JBT_REG_HCLOCK_QVGA = 0xed, - -}; - -enum jbt_resolution { - JBT_RESOLUTION_VGA, - JBT_RESOLUTION_QVGA, -}; - -enum jbt_power_mode { - JBT_POWER_MODE_DEEP_STANDBY, - JBT_POWER_MODE_SLEEP, - JBT_POWER_MODE_NORMAL, -}; - -static const char *jbt_power_mode_names[] = { - [JBT_POWER_MODE_DEEP_STANDBY] = "deep-standby", - [JBT_POWER_MODE_SLEEP] = "sleep", - [JBT_POWER_MODE_NORMAL] = "normal", -}; - -static const char *jbt_resolution_names[] = { - [JBT_RESOLUTION_VGA] = "vga", - [JBT_RESOLUTION_QVGA] = "qvga", -}; - -struct jbt_info { - struct mutex lock; /* protects this structure */ - enum jbt_resolution resolution; - enum jbt_power_mode power_mode; - enum jbt_power_mode suspend_mode; - int suspended; - struct spi_device *spi_dev; - struct lcd_device *lcd_dev; - unsigned long last_sleep; - struct delayed_work blank_work; - int blank_mode; - u16 tx_buf[4]; - u16 reg_cache[0xEE]; -}; - -#define JBT_COMMAND 0x000 -#define JBT_DATA 0x100 - -static int jbt_reg_write_nodata(struct jbt_info *jbt, u8 reg) -{ - int rc; - - jbt->tx_buf[0] = JBT_COMMAND | reg; - rc = spi_write(jbt->spi_dev, (u8 *)jbt->tx_buf, - 1*sizeof(u16)); - if (rc == 0) - jbt->reg_cache[reg] = 0; - else - dev_err(&jbt->spi_dev->dev, "jbt_reg_write_nodata spi_write ret %d\n", - rc); - - return rc; -} - - -static int jbt_reg_write(struct jbt_info *jbt, u8 reg, u8 data) -{ - int rc; - - jbt->tx_buf[0] = JBT_COMMAND | reg; - jbt->tx_buf[1] = JBT_DATA | data; - rc = spi_write(jbt->spi_dev, (u8 *)jbt->tx_buf, - 2*sizeof(u16)); - if (rc == 0) - jbt->reg_cache[reg] = data; - else - dev_err(&jbt->spi_dev->dev, "jbt_reg_write spi_write ret %d\n", rc); - - return rc; -} - -static int jbt_reg_write16(struct jbt_info *jbt, u8 reg, u16 data) -{ - int rc; - - jbt->tx_buf[0] = JBT_COMMAND | reg; - jbt->tx_buf[1] = JBT_DATA | (data >> 8); - jbt->tx_buf[2] = JBT_DATA | (data & 0xff); - - rc = spi_write(jbt->spi_dev, (u8 *)jbt->tx_buf, - 3*sizeof(u16)); - if (rc == 0) - jbt->reg_cache[reg] = data; - else - dev_err(&jbt->spi_dev->dev, "jbt_reg_write16 spi_write ret %d\n", rc); - - return rc; -} - -static int jbt_init_regs(struct jbt_info *jbt) -{ - int rc; - - dev_dbg(&jbt->spi_dev->dev, "entering %cVGA mode\n", - jbt->resolution == JBT_RESOLUTION_QVGA ? 'Q' : ' '); - - rc = jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE1, 0x01); - rc |= jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE2, 0x00); - rc |= jbt_reg_write(jbt, JBT_REG_RGB_FORMAT, 0x60); - rc |= jbt_reg_write(jbt, JBT_REG_DRIVE_SYSTEM, 0x10); - rc |= jbt_reg_write(jbt, JBT_REG_BOOSTER_OP, 0x56); - rc |= jbt_reg_write(jbt, JBT_REG_BOOSTER_MODE, 0x33); - rc |= jbt_reg_write(jbt, JBT_REG_BOOSTER_FREQ, 0x11); - rc |= jbt_reg_write(jbt, JBT_REG_OPAMP_SYSCLK, 0x02); - rc |= jbt_reg_write(jbt, JBT_REG_VSC_VOLTAGE, 0x2b); - rc |= jbt_reg_write(jbt, JBT_REG_VCOM_VOLTAGE, 0x40); - rc |= jbt_reg_write(jbt, JBT_REG_EXT_DISPL, 0x03); - rc |= jbt_reg_write(jbt, JBT_REG_DCCLK_DCEV, 0x04); - /* - * default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement - * to avoid red / blue flicker - */ - rc |= jbt_reg_write(jbt, JBT_REG_ASW_SLEW, 0x04 | (1 << 5)); - rc |= jbt_reg_write(jbt, JBT_REG_DUMMY_DISPLAY, 0x00); - - rc |= jbt_reg_write(jbt, JBT_REG_SLEEP_OUT_FR_A, 0x11); - rc |= jbt_reg_write(jbt, JBT_REG_SLEEP_OUT_FR_B, 0x11); - rc |= jbt_reg_write(jbt, JBT_REG_SLEEP_OUT_FR_C, 0x11); - rc |= jbt_reg_write16(jbt, JBT_REG_SLEEP_IN_LCCNT_D, 0x2040); - rc |= jbt_reg_write16(jbt, JBT_REG_SLEEP_IN_LCCNT_E, 0x60c0); - rc |= jbt_reg_write16(jbt, JBT_REG_SLEEP_IN_LCCNT_F, 0x1020); - rc |= jbt_reg_write16(jbt, JBT_REG_SLEEP_IN_LCCNT_G, 0x60c0); - - rc |= jbt_reg_write16(jbt, JBT_REG_GAMMA1_FINE_1, 0x5533); - rc |= jbt_reg_write(jbt, JBT_REG_GAMMA1_FINE_2, 0x00); - rc |= jbt_reg_write(jbt, JBT_REG_GAMMA1_INCLINATION, 0x00); - rc |= jbt_reg_write(jbt, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00); - - if (jbt->resolution != JBT_RESOLUTION_QVGA) { - rc |= jbt_reg_write16(jbt, JBT_REG_HCLOCK_VGA, 0x1f0); - rc |= jbt_reg_write(jbt, JBT_REG_BLANK_CONTROL, 0x02); - rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV, 0x0804); - - rc |= jbt_reg_write(jbt, JBT_REG_CKV_ON_OFF, 0x01); - rc |= jbt_reg_write16(jbt, JBT_REG_CKV_1_2, 0x0000); - - rc |= jbt_reg_write16(jbt, JBT_REG_OEV_TIMING, 0x0d0e); - rc |= jbt_reg_write16(jbt, JBT_REG_ASW_TIMING_1, 0x11a4); - rc |= jbt_reg_write(jbt, JBT_REG_ASW_TIMING_2, 0x0e); - } else { - rc |= jbt_reg_write16(jbt, JBT_REG_HCLOCK_QVGA, 0x00ff); - rc |= jbt_reg_write(jbt, JBT_REG_BLANK_CONTROL_QVGA, 0x02); - rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV_QVGA, 0x0804); - - rc |= jbt_reg_write(jbt, JBT_REG_CKV_ON_OFF_QVGA, 0x01); - rc |= jbt_reg_write16(jbt, JBT_REG_CKV_1_2_QVGA, 0x0008); - - rc |= jbt_reg_write16(jbt, JBT_REG_OEV_TIMING_QVGA, 0x050a); - rc |= jbt_reg_write16(jbt, JBT_REG_ASW_TIMING_1_QVGA, 0x0a19); - rc |= jbt_reg_write(jbt, JBT_REG_ASW_TIMING_2_QVGA, 0x0a); - } - - return rc ? -EIO : 0; -} - -static int standby_to_sleep(struct jbt_info *jbt) -{ - int rc; - - /* three times command zero */ - rc = jbt_reg_write_nodata(jbt, 0x00); - mdelay(1); - rc |= jbt_reg_write_nodata(jbt, 0x00); - mdelay(1); - rc |= jbt_reg_write_nodata(jbt, 0x00); - mdelay(1); - - /* deep standby out */ - rc |= jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x11); - mdelay(1); - rc = jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE, 0x28); - - /* (re)initialize register set */ - rc |= jbt_init_regs(jbt); - - return rc ? -EIO : 0; -} - -static int sleep_to_normal(struct jbt_info *jbt) -{ - int rc; - - /* Make sure we are 120 ms after SLEEP_OUT */ - if (time_before(jiffies, jbt->last_sleep)) - mdelay(jiffies_to_msecs(jbt->last_sleep - jiffies)); - - if (jbt->resolution == JBT_RESOLUTION_VGA) { - /* RGB I/F on, RAM wirte off, QVGA through, SIGCON enable */ - rc = jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE, 0x80); - - /* Quad mode off */ - rc |= jbt_reg_write(jbt, JBT_REG_QUAD_RATE, 0x00); - } else { - /* RGB I/F on, RAM wirte off, QVGA through, SIGCON enable */ - rc = jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE, 0x81); - - /* Quad mode on */ - rc |= jbt_reg_write(jbt, JBT_REG_QUAD_RATE, 0x22); - } - - /* AVDD on, XVDD on */ - rc |= jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x16); - - /* Output control */ - rc |= jbt_reg_write16(jbt, JBT_REG_OUTPUT_CONTROL, 0xfff9); - - /* Turn on display */ - rc |= jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_ON); - - /* Sleep mode off */ - rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_OUT); - jbt->last_sleep = jiffies + msecs_to_jiffies(120); - - /* Allow the booster and display controller to restart stably */ - mdelay(5); - - return rc ? -EIO : 0; -} - -static int normal_to_sleep(struct jbt_info *jbt) -{ - int rc; - - /* Make sure we are 120 ms after SLEEP_OUT */ - while (time_before(jiffies, jbt->last_sleep)) - cpu_relax(); - - rc = jbt_reg_write_nodata(jbt, JBT_REG_DISPLAY_OFF); - rc |= jbt_reg_write16(jbt, JBT_REG_OUTPUT_CONTROL, 0x8000 | 1 << 3); - rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_IN); - jbt->last_sleep = jiffies + msecs_to_jiffies(120); - - /* Allow the internal circuits to stop automatically */ - mdelay(5); - - return rc ? -EIO : 0; -} - -static int sleep_to_standby(struct jbt_info *jbt) -{ - return jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x00); -} - -int jbt6k74_enter_power_mode(struct jbt_info *jbt, enum jbt_power_mode new_mode) -{ - struct jbt6k74_platform_data *pdata = jbt->spi_dev->dev.platform_data; - int rc = -EINVAL; - - dev_dbg(&jbt->spi_dev->dev, "entering (old_state=%s, new_state=%s)\n", - jbt_power_mode_names[jbt->power_mode], - jbt_power_mode_names[new_mode]); - - mutex_lock(&jbt->lock); - - if (jbt->suspended) { - switch (new_mode) { - case JBT_POWER_MODE_DEEP_STANDBY: - case JBT_POWER_MODE_SLEEP: - case JBT_POWER_MODE_NORMAL: - rc = 0; - jbt->suspend_mode = new_mode; - break; - default: - break; - } - } else if (new_mode == JBT_POWER_MODE_NORMAL && - pdata->enable_pixel_clock) { - pdata->enable_pixel_clock(&jbt->spi_dev->dev, 1); - } - - switch (jbt->power_mode) { - case JBT_POWER_MODE_DEEP_STANDBY: - switch (new_mode) { - case JBT_POWER_MODE_DEEP_STANDBY: - rc = 0; - break; - case JBT_POWER_MODE_SLEEP: - rc = standby_to_sleep(jbt); - break; - case JBT_POWER_MODE_NORMAL: - /* first transition into sleep */ - rc = standby_to_sleep(jbt); - /* then transition into normal */ - rc |= sleep_to_normal(jbt); - break; - } - break; - case JBT_POWER_MODE_SLEEP: - switch (new_mode) { - case JBT_POWER_MODE_SLEEP: - rc = 0; - break; - case JBT_POWER_MODE_DEEP_STANDBY: - rc = sleep_to_standby(jbt); - break; - case JBT_POWER_MODE_NORMAL: - rc = sleep_to_normal(jbt); - break; - } - break; - case JBT_POWER_MODE_NORMAL: - switch (new_mode) { - case JBT_POWER_MODE_NORMAL: - rc = 0; - break; - case JBT_POWER_MODE_DEEP_STANDBY: - /* first transition into sleep */ - rc = normal_to_sleep(jbt); - /* then transition into deep standby */ - rc |= sleep_to_standby(jbt); - break; - case JBT_POWER_MODE_SLEEP: - rc = normal_to_sleep(jbt); - break; - } - } - - if (rc == 0) { - jbt->power_mode = new_mode; - if (new_mode != JBT_POWER_MODE_NORMAL && - pdata->enable_pixel_clock) - pdata->enable_pixel_clock(&jbt->spi_dev->dev, 0); - } else { - dev_err(&jbt->spi_dev->dev, "Failed enter state '%s')\n", - jbt_power_mode_names[new_mode]); - } - - mutex_unlock(&jbt->lock); - - return rc; -} -EXPORT_SYMBOL_GPL(jbt6k74_enter_power_mode); - -int jbt6k74_set_resolution(struct jbt_info *jbt, enum jbt_resolution new_resolution) { - int rc = 0; - enum jbt_resolution old_resolution; - - if (new_resolution != JBT_RESOLUTION_VGA && - new_resolution != JBT_RESOLUTION_QVGA) - return -EINVAL; - - mutex_lock(&jbt->lock); - - if (jbt->resolution == new_resolution) - goto out_unlock; - - old_resolution = jbt->resolution; - jbt->resolution = new_resolution; - - if (jbt->power_mode == JBT_POWER_MODE_NORMAL) { - - /* first transition into sleep */ - rc = normal_to_sleep(jbt); - /* second transition into deep standby */ -/* rc |= sleep_to_standby(jbt);*/ - /* third transition into sleep */ -/* rc |= standby_to_sleep(jbt);*/ - /* fourth transition into normal */ - rc |= sleep_to_normal(jbt); - - if (rc) { - jbt->resolution = old_resolution; - dev_err(&jbt->spi_dev->dev, "Failed to set resolution '%s')\n", - jbt_resolution_names[new_resolution]); - } - } - -out_unlock: - mutex_unlock(&jbt->lock); - - return rc; -} -EXPORT_SYMBOL_GPL(jbt6k74_set_resolution); - -static ssize_t resolution_read(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct jbt_info *jbt = dev_get_drvdata(dev); - - if (jbt->resolution >= ARRAY_SIZE(jbt_resolution_names)) - return -EIO; - - return sprintf(buf, "%s\n", jbt_resolution_names[jbt->resolution]); -} - -static ssize_t resolution_write(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct jbt_info *jbt = dev_get_drvdata(dev); - int i, rc; - - for (i = 0; i < ARRAY_SIZE(jbt_resolution_names); i++) { - if (!strncmp(buf, jbt_resolution_names[i], - strlen(jbt_resolution_names[i]))) { - rc = jbt6k74_set_resolution(jbt, i); - if (rc) - return rc; - return count; - } - } - - return -EINVAL; -} - -static DEVICE_ATTR(resolution, 0644, resolution_read, resolution_write); - -static int reg_by_string(const char *name) -{ - if (!strcmp(name, "gamma_fine1")) - return JBT_REG_GAMMA1_FINE_1; - else if (!strcmp(name, "gamma_fine2")) - return JBT_REG_GAMMA1_FINE_2; - else if (!strcmp(name, "gamma_inclination")) - return JBT_REG_GAMMA1_INCLINATION; - else - return JBT_REG_GAMMA1_BLUE_OFFSET; -} - -static ssize_t gamma_read(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct jbt_info *jbt = dev_get_drvdata(dev); - int reg = reg_by_string(attr->attr.name); - u16 val; - - mutex_lock(&jbt->lock); - val = jbt->reg_cache[reg]; - mutex_unlock(&jbt->lock); - - return sprintf(buf, "0x%04x\n", val); -} - -static ssize_t gamma_write(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct jbt_info *jbt = dev_get_drvdata(dev); - int reg = reg_by_string(attr->attr.name); - unsigned long val = simple_strtoul(buf, NULL, 10); - - dev_info(dev, "writing gama %lu\n", val & 0xff); - - mutex_lock(&jbt->lock); - jbt_reg_write(jbt, reg, val & 0xff); - mutex_unlock(&jbt->lock); - - return count; -} - -static ssize_t reset_write(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - int rc; - struct jbt_info *jbt = dev_get_drvdata(dev); - struct jbt6k74_platform_data *pdata = jbt->spi_dev->dev.platform_data; - - dev_info(dev, "reset\n"); - - mutex_lock(&jbt->lock); - - /* hard reset the jbt6k74 */ - (pdata->reset)(0, 0); - mdelay(1); - (pdata->reset)(0, 1); - mdelay(120); - - rc = jbt_reg_write_nodata(jbt, 0x01); - if (rc < 0) - dev_err(&jbt->spi_dev->dev, "cannot soft reset\n"); - mdelay(120); - - mutex_unlock(&jbt->lock); - - jbt6k74_enter_power_mode(jbt, jbt->power_mode); - - return count; -} - -static DEVICE_ATTR(gamma_fine1, 0644, gamma_read, gamma_write); -static DEVICE_ATTR(gamma_fine2, 0644, gamma_read, gamma_write); -static DEVICE_ATTR(gamma_inclination, 0644, gamma_read, gamma_write); -static DEVICE_ATTR(gamma_blue_offset, 0644, gamma_read, gamma_write); -static DEVICE_ATTR(reset, 0600, NULL, reset_write); - -static struct attribute *jbt_sysfs_entries[] = { - &dev_attr_resolution.attr, - &dev_attr_gamma_fine1.attr, - &dev_attr_gamma_fine2.attr, - &dev_attr_gamma_inclination.attr, - &dev_attr_gamma_blue_offset.attr, - &dev_attr_reset.attr, - NULL, -}; - -static struct attribute_group jbt_attr_group = { - .name = NULL, - .attrs = jbt_sysfs_entries, -}; - -/* FIXME: This in an ugly hack to delay display blanking. - When the jbt is in sleep mode it displays an all white screen and thus one - will a see a short flash. - By delaying the blanking we will give the backlight a chance to turn off and - thus avoid getting the flash */ -static void jbt_blank_worker(struct work_struct *work) { - struct jbt_info *jbt = container_of(work, struct jbt_info, - blank_work.work); - - switch (jbt->blank_mode) { - case FB_BLANK_NORMAL: - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_SLEEP); - break; - case FB_BLANK_POWERDOWN: - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY); - break; - default: - break; - } -} - -static int jbt6k74_set_mode(struct lcd_device *ld, struct fb_videomode *m) { - int rc = -EINVAL; - struct jbt_info *jbt = dev_get_drvdata(&ld->dev); - - if (m->xres == 240 && m->yres == 320) { - rc = jbt6k74_set_resolution(jbt, JBT_RESOLUTION_QVGA); - } else if (m->xres == 480 && m->yres == 640) { - rc = jbt6k74_set_resolution(jbt, JBT_RESOLUTION_VGA); - } else { - dev_err(&jbt->spi_dev->dev, "Unknown resolution. Entering sleep mode.\n"); - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_SLEEP); - } - - return rc; -} - -static int jbt6k74_set_power(struct lcd_device *ld, int power) { - int rc = -EINVAL; - struct jbt_info *jbt = dev_get_drvdata(&ld->dev); - - jbt->blank_mode = power; - cancel_rearming_delayed_work(&jbt->blank_work); - - switch (power) { - case FB_BLANK_UNBLANK: - dev_dbg(&jbt->spi_dev->dev, "unblank\n"); - rc = jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL); - break; - case FB_BLANK_NORMAL: - dev_dbg(&jbt->spi_dev->dev, "blank\n"); - rc = schedule_delayed_work(&jbt->blank_work, HZ); - break; - case FB_BLANK_POWERDOWN: - dev_dbg(&jbt->spi_dev->dev, "powerdown\n"); - rc = schedule_delayed_work(&jbt->blank_work, HZ); - break; - default: - break; - } - - return rc; -} - -static int jbt6k74_get_power(struct lcd_device *ld) { - struct jbt_info *jbt = dev_get_drvdata(&ld->dev); - - switch (jbt->power_mode) { - case JBT_POWER_MODE_NORMAL: - return FB_BLANK_UNBLANK; - case JBT_POWER_MODE_SLEEP: - return FB_BLANK_NORMAL; - default: - return JBT_POWER_MODE_DEEP_STANDBY; - } -} - -struct lcd_ops jbt6k74_lcd_ops = { - .set_power = jbt6k74_set_power, - .get_power = jbt6k74_get_power, - .set_mode = jbt6k74_set_mode, -}; - -/* linux device model infrastructure */ - -static int __devinit jbt_probe(struct spi_device *spi) -{ - int rc; - struct jbt_info *jbt; - struct jbt6k74_platform_data *pdata = spi->dev.platform_data; - - /* the controller doesn't have a MISO pin; we can't do detection */ - - spi->mode = SPI_CPOL | SPI_CPHA; - spi->bits_per_word = 9; - - rc = spi_setup(spi); - if (rc < 0) { - dev_err(&spi->dev, - "error during spi_setup of jbt6k74 driver\n"); - return rc; - } - - jbt = kzalloc(sizeof(*jbt), GFP_KERNEL); - if (!jbt) - return -ENOMEM; - - jbt->spi_dev = spi; - - jbt->lcd_dev = lcd_device_register("jbt6k74-lcd", &spi->dev, - jbt, &jbt6k74_lcd_ops); - - if (IS_ERR(jbt->lcd_dev)) { - rc = PTR_ERR(jbt->lcd_dev); - goto err_free_drvdata; - } - - INIT_DELAYED_WORK(&jbt->blank_work, jbt_blank_worker); - - jbt->resolution = JBT_RESOLUTION_VGA; - jbt->power_mode = JBT_POWER_MODE_DEEP_STANDBY; - jbt->last_sleep = jiffies + msecs_to_jiffies(120); - mutex_init(&jbt->lock); - - dev_set_drvdata(&spi->dev, jbt); - - rc = jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL); - if (rc < 0) { - dev_err(&spi->dev, "cannot enter NORMAL state\n"); - goto err_unregister_lcd; - } - - rc = sysfs_create_group(&spi->dev.kobj, &jbt_attr_group); - if (rc < 0) { - dev_err(&spi->dev, "cannot create sysfs group\n"); - goto err_standby; - } - - if (pdata->probe_completed) - (pdata->probe_completed)(&spi->dev); - - return 0; - -err_standby: - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY); -err_unregister_lcd: - lcd_device_unregister(jbt->lcd_dev); -err_free_drvdata: - dev_set_drvdata(&spi->dev, NULL); - kfree(jbt); - - return rc; -} - -static int __devexit jbt_remove(struct spi_device *spi) -{ - struct jbt_info *jbt = dev_get_drvdata(&spi->dev); - - /* We don't want to switch off the display in case the user - * accidentially unloads the module (whose use count normally is 0) */ - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_NORMAL); - - sysfs_remove_group(&spi->dev.kobj, &jbt_attr_group); - dev_set_drvdata(&spi->dev, NULL); - - lcd_device_unregister(jbt->lcd_dev); - - kfree(jbt); - - return 0; -} - -#ifdef CONFIG_PM -static int jbt_suspend(struct spi_device *spi, pm_message_t state) -{ - struct jbt_info *jbt = dev_get_drvdata(&spi->dev); - - jbt->suspend_mode = jbt->power_mode; - - jbt6k74_enter_power_mode(jbt, JBT_POWER_MODE_DEEP_STANDBY); - jbt->suspended = 1; - - dev_info(&spi->dev, "suspended\n"); - - return 0; -} - -int jbt6k74_resume(struct spi_device *spi) -{ - struct jbt_info *jbt = dev_get_drvdata(&spi->dev); - - jbt->suspended = 0; - jbt6k74_enter_power_mode(jbt, jbt->suspend_mode); - - dev_info(&spi->dev, "resumed\n"); - - return 0; -} -EXPORT_SYMBOL_GPL(jbt6k74_resume); - -#else -#define jbt_suspend NULL -#define jbt6k74_resume NULL -#endif - -static struct spi_driver jbt6k74_driver = { - .driver = { - .name = "jbt6k74", - .owner = THIS_MODULE, - }, - - .probe = jbt_probe, - .remove = __devexit_p(jbt_remove), - .suspend = jbt_suspend, - .resume = jbt6k74_resume, -}; - -static int __init jbt_init(void) -{ - return spi_register_driver(&jbt6k74_driver); -} - -static void __exit jbt_exit(void) -{ - spi_unregister_driver(&jbt6k74_driver); -} - -MODULE_DESCRIPTION("SPI driver for tpo JBT6K74-AS LCM control interface"); -MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>"); -MODULE_LICENSE("GPL"); - -module_init(jbt_init); -module_exit(jbt_exit); |