+++ /dev/null
-/* 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);
projects / openwrt / svn-archive / archive.git / blobdiff