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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 09:08:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
254
drivers/mfd/ab8500-sysctrl.c
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254
drivers/mfd/ab8500-sysctrl.c
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/*
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* Copyright (C) ST-Ericsson SA 2010
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* Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com> for ST Ericsson.
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* License terms: GNU General Public License (GPL) version 2
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/reboot.h>
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#include <linux/signal.h>
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#include <linux/power_supply.h>
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#include <linux/mfd/abx500.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/mfd/abx500/ab8500-sysctrl.h>
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/* RtcCtrl bits */
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#define AB8500_ALARM_MIN_LOW 0x08
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#define AB8500_ALARM_MIN_MID 0x09
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#define RTC_CTRL 0x0B
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#define RTC_ALARM_ENABLE 0x4
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static struct device *sysctrl_dev;
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static void ab8500_power_off(void)
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{
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sigset_t old;
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sigset_t all;
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static char *pss[] = {"ab8500_ac", "pm2301", "ab8500_usb"};
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int i;
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bool charger_present = false;
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union power_supply_propval val;
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struct power_supply *psy;
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int ret;
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if (sysctrl_dev == NULL) {
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pr_err("%s: sysctrl not initialized\n", __func__);
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return;
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}
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/*
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* If we have a charger connected and we're powering off,
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* reboot into charge-only mode.
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*/
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for (i = 0; i < ARRAY_SIZE(pss); i++) {
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psy = power_supply_get_by_name(pss[i]);
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if (!psy)
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continue;
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ret = psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &val);
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if (!ret && val.intval) {
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charger_present = true;
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break;
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}
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}
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if (!charger_present)
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goto shutdown;
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/* Check if battery is known */
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psy = power_supply_get_by_name("ab8500_btemp");
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if (psy) {
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ret = psy->get_property(psy, POWER_SUPPLY_PROP_TECHNOLOGY,
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&val);
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if (!ret && val.intval != POWER_SUPPLY_TECHNOLOGY_UNKNOWN) {
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printk(KERN_INFO
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"Charger \"%s\" is connected with known battery."
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" Rebooting.\n",
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pss[i]);
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machine_restart("charging");
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}
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}
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shutdown:
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sigfillset(&all);
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if (!sigprocmask(SIG_BLOCK, &all, &old)) {
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(void)ab8500_sysctrl_set(AB8500_STW4500CTRL1,
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AB8500_STW4500CTRL1_SWOFF |
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AB8500_STW4500CTRL1_SWRESET4500N);
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(void)sigprocmask(SIG_SETMASK, &old, NULL);
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}
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}
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/*
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* Use the AB WD to reset the platform. It will perform a hard
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* reset instead of a soft reset. Write the reset reason to
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* the AB before reset, which can be read upon restart.
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*/
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void ab8500_restart(char mode, const char *cmd)
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{
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struct ab8500_platform_data *plat;
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struct ab8500_sysctrl_platform_data *pdata;
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u16 reason = 0;
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u8 val;
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if (sysctrl_dev == NULL) {
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pr_err("%s: sysctrl not initialized\n", __func__);
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return;
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}
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plat = dev_get_platdata(sysctrl_dev->parent);
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pdata = plat->sysctrl;
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if (pdata && pdata->reboot_reason_code)
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reason = pdata->reboot_reason_code(cmd);
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else
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pr_warn("[%s] No reboot reason set. Default reason %d\n",
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__func__, reason);
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/*
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* Disable RTC alarm, just a precaution so that no alarm
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* is running when WD reset is executed.
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*/
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abx500_get_register_interruptible(sysctrl_dev, AB8500_RTC,
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RTC_CTRL , &val);
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abx500_set_register_interruptible(sysctrl_dev, AB8500_RTC,
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RTC_CTRL , (val & ~RTC_ALARM_ENABLE));
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/*
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* Android is not using the RTC alarm registers during reboot
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* so we borrow them for writing the reason of reset
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*/
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/* reason[8 LSB] */
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val = reason & 0xFF;
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abx500_set_register_interruptible(sysctrl_dev, AB8500_RTC,
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AB8500_ALARM_MIN_LOW , val);
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/* reason[8 MSB] */
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val = (reason>>8) & 0xFF;
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abx500_set_register_interruptible(sysctrl_dev, AB8500_RTC,
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AB8500_ALARM_MIN_MID , val);
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/* Setting WD timeout to 0 */
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ab8500_sysctrl_write(AB8500_MAINWDOGTIMER, 0xFF, 0x0);
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/* Setting the parameters to AB8500 WD*/
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ab8500_sysctrl_write(AB8500_MAINWDOGCTRL, 0xFF, (AB8500_ENABLE_WD |
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AB8500_WD_RESTART_ON_EXPIRE | AB8500_KICK_WD));
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}
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static inline bool valid_bank(u8 bank)
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{
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return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
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(bank == AB8500_SYS_CTRL2_BLOCK));
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}
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int ab8500_sysctrl_read(u16 reg, u8 *value)
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{
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u8 bank;
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if (sysctrl_dev == NULL)
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return -EINVAL;
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bank = (reg >> 8);
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if (!valid_bank(bank))
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return -EINVAL;
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return abx500_get_register_interruptible(sysctrl_dev, bank,
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(u8)(reg & 0xFF), value);
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}
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EXPORT_SYMBOL(ab8500_sysctrl_read);
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int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
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{
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u8 bank;
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if (sysctrl_dev == NULL)
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return -EINVAL;
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bank = (reg >> 8);
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if (!valid_bank(bank))
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return -EINVAL;
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return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
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(u8)(reg & 0xFF), mask, value);
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}
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EXPORT_SYMBOL(ab8500_sysctrl_write);
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static int ab8500_sysctrl_probe(struct platform_device *pdev)
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{
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struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
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struct ab8500_platform_data *plat;
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struct ab8500_sysctrl_platform_data *pdata;
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plat = dev_get_platdata(pdev->dev.parent);
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if (!plat)
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return -EINVAL;
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sysctrl_dev = &pdev->dev;
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if (!pm_power_off)
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pm_power_off = ab8500_power_off;
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pdata = plat->sysctrl;
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if (pdata) {
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int last, ret, i, j;
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if (is_ab8505(ab8500))
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last = AB8500_SYSCLKREQ4RFCLKBUF;
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else
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last = AB8500_SYSCLKREQ8RFCLKBUF;
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for (i = AB8500_SYSCLKREQ1RFCLKBUF; i <= last; i++) {
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j = i - AB8500_SYSCLKREQ1RFCLKBUF;
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ret = ab8500_sysctrl_write(i, 0xff,
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pdata->initial_req_buf_config[j]);
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dev_dbg(&pdev->dev,
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"Setting SysClkReq%dRfClkBuf 0x%X\n",
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j + 1,
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pdata->initial_req_buf_config[j]);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"unable to set sysClkReq%dRfClkBuf: "
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"%d\n", j + 1, ret);
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}
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}
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}
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return 0;
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}
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static int ab8500_sysctrl_remove(struct platform_device *pdev)
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{
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sysctrl_dev = NULL;
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if (pm_power_off == ab8500_power_off)
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pm_power_off = NULL;
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return 0;
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}
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static struct platform_driver ab8500_sysctrl_driver = {
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.driver = {
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.name = "ab8500-sysctrl",
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.owner = THIS_MODULE,
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},
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.probe = ab8500_sysctrl_probe,
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.remove = ab8500_sysctrl_remove,
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};
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static int __init ab8500_sysctrl_init(void)
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{
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return platform_driver_register(&ab8500_sysctrl_driver);
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}
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arch_initcall(ab8500_sysctrl_init);
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MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com");
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MODULE_DESCRIPTION("AB8500 system control driver");
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MODULE_LICENSE("GPL v2");
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