diff options
author | Sebastian Reichel <sre@kernel.org> | 2016-06-17 11:54:32 (GMT) |
---|---|---|
committer | Sebastian Reichel <sre@kernel.org> | 2016-08-10 23:11:03 (GMT) |
commit | 8c0984e5a75337df513047ec92a6c09d78e3e5cd (patch) | |
tree | a2fc0a0dd7c7c40d9379bdd1c2b279c0959d0e1f /drivers/power/twl4030_charger.c | |
parent | 29b4817d4018df78086157ea3a55c1d9424a7cfc (diff) | |
download | linux-8c0984e5a75337df513047ec92a6c09d78e3e5cd.tar.xz |
power: move power supply drivers to power/supply
This moves all power supply drivers from drivers/power/
to drivers/power/supply/. The intention is a cleaner
source tree, since drivers/power/ also contains frameworks
unrelated to power supply, like adaptive voltage scaling.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power/twl4030_charger.c')
-rw-r--r-- | drivers/power/twl4030_charger.c | 1162 |
1 files changed, 0 insertions, 1162 deletions
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c deleted file mode 100644 index bcd4dc3..0000000 --- a/drivers/power/twl4030_charger.c +++ /dev/null @@ -1,1162 +0,0 @@ -/* - * TWL4030/TPS65950 BCI (Battery Charger Interface) driver - * - * Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com> - * - * based on twl4030_bci_battery.c by TI - * Copyright (C) 2008 Texas Instruments, Inc. - * - * 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/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/i2c/twl.h> -#include <linux/power_supply.h> -#include <linux/notifier.h> -#include <linux/usb/otg.h> -#include <linux/iio/consumer.h> - -#define TWL4030_BCIMDEN 0x00 -#define TWL4030_BCIMDKEY 0x01 -#define TWL4030_BCIMSTATEC 0x02 -#define TWL4030_BCIICHG 0x08 -#define TWL4030_BCIVAC 0x0a -#define TWL4030_BCIVBUS 0x0c -#define TWL4030_BCIMFSTS3 0x0F -#define TWL4030_BCIMFSTS4 0x10 -#define TWL4030_BCICTL1 0x23 -#define TWL4030_BB_CFG 0x12 -#define TWL4030_BCIIREF1 0x27 -#define TWL4030_BCIIREF2 0x28 -#define TWL4030_BCIMFKEY 0x11 -#define TWL4030_BCIMFEN3 0x14 -#define TWL4030_BCIMFTH8 0x1d -#define TWL4030_BCIMFTH9 0x1e -#define TWL4030_BCIWDKEY 0x21 - -#define TWL4030_BCIMFSTS1 0x01 - -#define TWL4030_BCIAUTOWEN BIT(5) -#define TWL4030_CONFIG_DONE BIT(4) -#define TWL4030_CVENAC BIT(2) -#define TWL4030_BCIAUTOUSB BIT(1) -#define TWL4030_BCIAUTOAC BIT(0) -#define TWL4030_CGAIN BIT(5) -#define TWL4030_USBFASTMCHG BIT(2) -#define TWL4030_STS_VBUS BIT(7) -#define TWL4030_STS_USB_ID BIT(2) -#define TWL4030_BBCHEN BIT(4) -#define TWL4030_BBSEL_MASK 0x0c -#define TWL4030_BBSEL_2V5 0x00 -#define TWL4030_BBSEL_3V0 0x04 -#define TWL4030_BBSEL_3V1 0x08 -#define TWL4030_BBSEL_3V2 0x0c -#define TWL4030_BBISEL_MASK 0x03 -#define TWL4030_BBISEL_25uA 0x00 -#define TWL4030_BBISEL_150uA 0x01 -#define TWL4030_BBISEL_500uA 0x02 -#define TWL4030_BBISEL_1000uA 0x03 - -#define TWL4030_BATSTSPCHG BIT(2) -#define TWL4030_BATSTSMCHG BIT(6) - -/* BCI interrupts */ -#define TWL4030_WOVF BIT(0) /* Watchdog overflow */ -#define TWL4030_TMOVF BIT(1) /* Timer overflow */ -#define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ -#define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ -#define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ -#define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ -#define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ -#define TWL4030_BATSTS BIT(7) /* Battery status */ - -#define TWL4030_VBATLVL BIT(0) /* VBAT level */ -#define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ -#define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ -#define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ - -#define TWL4030_MSTATEC_USB BIT(4) -#define TWL4030_MSTATEC_AC BIT(5) -#define TWL4030_MSTATEC_MASK 0x0f -#define TWL4030_MSTATEC_QUICK1 0x02 -#define TWL4030_MSTATEC_QUICK7 0x07 -#define TWL4030_MSTATEC_COMPLETE1 0x0b -#define TWL4030_MSTATEC_COMPLETE4 0x0e - -/* - * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) - * then AC is available. - */ -static inline int ac_available(struct iio_channel *channel_vac) -{ - int val, err; - - if (!channel_vac) - return 0; - - err = iio_read_channel_processed(channel_vac, &val); - if (err < 0) - return 0; - return val > 4500; -} - -static bool allow_usb; -module_param(allow_usb, bool, 0644); -MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); - -struct twl4030_bci { - struct device *dev; - struct power_supply *ac; - struct power_supply *usb; - struct usb_phy *transceiver; - struct notifier_block usb_nb; - struct work_struct work; - int irq_chg; - int irq_bci; - int usb_enabled; - - /* - * ichg_* and *_cur values in uA. If any are 'large', we set - * CGAIN to '1' which doubles the range for half the - * precision. - */ - unsigned int ichg_eoc, ichg_lo, ichg_hi; - unsigned int usb_cur, ac_cur; - struct iio_channel *channel_vac; - bool ac_is_active; - int usb_mode, ac_mode; /* charging mode requested */ -#define CHARGE_OFF 0 -#define CHARGE_AUTO 1 -#define CHARGE_LINEAR 2 - - /* When setting the USB current we slowly increase the - * requested current until target is reached or the voltage - * drops below 4.75V. In the latter case we step back one - * step. - */ - unsigned int usb_cur_target; - struct delayed_work current_worker; -#define USB_CUR_STEP 20000 /* 20mA at a time */ -#define USB_MIN_VOLT 4750000 /* 4.75V */ -#define USB_CUR_DELAY msecs_to_jiffies(100) -#define USB_MAX_CURRENT 1700000 /* TWL4030 caps at 1.7A */ - - unsigned long event; -}; - -/* strings for 'usb_mode' values */ -static char *modes[] = { "off", "auto", "continuous" }; - -/* - * clear and set bits on an given register on a given module - */ -static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) -{ - u8 val = 0; - int ret; - - ret = twl_i2c_read_u8(mod_no, &val, reg); - if (ret) - return ret; - - val &= ~clear; - val |= set; - - return twl_i2c_write_u8(mod_no, val, reg); -} - -static int twl4030_bci_read(u8 reg, u8 *val) -{ - return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); -} - -static int twl4030_clear_set_boot_bci(u8 clear, u8 set) -{ - return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, - TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, - TWL4030_PM_MASTER_BOOT_BCI); -} - -static int twl4030bci_read_adc_val(u8 reg) -{ - int ret, temp; - u8 val; - - /* read MSB */ - ret = twl4030_bci_read(reg + 1, &val); - if (ret) - return ret; - - temp = (int)(val & 0x03) << 8; - - /* read LSB */ - ret = twl4030_bci_read(reg, &val); - if (ret) - return ret; - - return temp | val; -} - -/* - * Check if Battery Pack was present - */ -static int twl4030_is_battery_present(struct twl4030_bci *bci) -{ - int ret; - u8 val = 0; - - /* Battery presence in Main charge? */ - ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val, TWL4030_BCIMFSTS3); - if (ret) - return ret; - if (val & TWL4030_BATSTSMCHG) - return 0; - - /* - * OK, It could be that bootloader did not enable main charger, - * pre-charge is h/w auto. So, Battery presence in Pre-charge? - */ - ret = twl_i2c_read_u8(TWL4030_MODULE_PRECHARGE, &val, - TWL4030_BCIMFSTS1); - if (ret) - return ret; - if (val & TWL4030_BATSTSPCHG) - return 0; - - return -ENODEV; -} - -/* - * TI provided formulas: - * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 - * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 - * Here we use integer approximation of: - * CGAIN == 0: val * 1.6618 - 0.85 * 1000 - * CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2 - */ -/* - * convert twl register value for currents into uA - */ -static int regval2ua(int regval, bool cgain) -{ - if (cgain) - return (regval * 16618 - 8500 * 1000) / 5; - else - return (regval * 16618 - 8500 * 1000) / 10; -} - -/* - * convert uA currents into twl register value - */ -static int ua2regval(int ua, bool cgain) -{ - int ret; - if (cgain) - ua /= 2; - ret = (ua * 10 + 8500 * 1000) / 16618; - /* rounding problems */ - if (ret < 512) - ret = 512; - return ret; -} - -static int twl4030_charger_update_current(struct twl4030_bci *bci) -{ - int status; - int cur; - unsigned reg, cur_reg; - u8 bcictl1, oldreg, fullreg; - bool cgain = false; - u8 boot_bci; - - /* - * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) - * and AC is enabled, set current for 'ac' - */ - if (ac_available(bci->channel_vac)) { - cur = bci->ac_cur; - bci->ac_is_active = true; - } else { - cur = bci->usb_cur; - bci->ac_is_active = false; - if (cur > bci->usb_cur_target) { - cur = bci->usb_cur_target; - bci->usb_cur = cur; - } - if (cur < bci->usb_cur_target) - schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY); - } - - /* First, check thresholds and see if cgain is needed */ - if (bci->ichg_eoc >= 200000) - cgain = true; - if (bci->ichg_lo >= 400000) - cgain = true; - if (bci->ichg_hi >= 820000) - cgain = true; - if (cur > 852000) - cgain = true; - - status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); - if (status < 0) - return status; - if (twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &boot_bci, - TWL4030_PM_MASTER_BOOT_BCI) < 0) - boot_bci = 0; - boot_bci &= 7; - - if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) - /* Need to turn for charging while we change the - * CGAIN bit. Leave it off while everything is - * updated. - */ - twl4030_clear_set_boot_bci(boot_bci, 0); - - /* - * For ichg_eoc, the hardware only supports reg values matching - * 100XXXX000, and requires the XXXX be stored in the high nibble - * of TWL4030_BCIMFTH8. - */ - reg = ua2regval(bci->ichg_eoc, cgain); - if (reg > 0x278) - reg = 0x278; - if (reg < 0x200) - reg = 0x200; - reg = (reg >> 3) & 0xf; - fullreg = reg << 4; - - /* - * For ichg_lo, reg value must match 10XXXX0000. - * XXXX is stored in low nibble of TWL4030_BCIMFTH8. - */ - reg = ua2regval(bci->ichg_lo, cgain); - if (reg > 0x2F0) - reg = 0x2F0; - if (reg < 0x200) - reg = 0x200; - reg = (reg >> 4) & 0xf; - fullreg |= reg; - - /* ichg_eoc and ichg_lo live in same register */ - status = twl4030_bci_read(TWL4030_BCIMFTH8, &oldreg); - if (status < 0) - return status; - if (oldreg != fullreg) { - status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xF4, - TWL4030_BCIMFKEY); - if (status < 0) - return status; - twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, - fullreg, TWL4030_BCIMFTH8); - } - - /* ichg_hi threshold must be 1XXXX01100 (I think) */ - reg = ua2regval(bci->ichg_hi, cgain); - if (reg > 0x3E0) - reg = 0x3E0; - if (reg < 0x200) - reg = 0x200; - fullreg = (reg >> 5) & 0xF; - fullreg <<= 4; - status = twl4030_bci_read(TWL4030_BCIMFTH9, &oldreg); - if (status < 0) - return status; - if ((oldreg & 0xF0) != fullreg) { - fullreg |= (oldreg & 0x0F); - status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, - TWL4030_BCIMFKEY); - if (status < 0) - return status; - twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, - fullreg, TWL4030_BCIMFTH9); - } - - /* - * And finally, set the current. This is stored in - * two registers. - */ - reg = ua2regval(cur, cgain); - /* we have only 10 bits */ - if (reg > 0x3ff) - reg = 0x3ff; - status = twl4030_bci_read(TWL4030_BCIIREF1, &oldreg); - if (status < 0) - return status; - cur_reg = oldreg; - status = twl4030_bci_read(TWL4030_BCIIREF2, &oldreg); - if (status < 0) - return status; - cur_reg |= oldreg << 8; - if (reg != oldreg) { - /* disable write protection for one write access for - * BCIIREF */ - status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, - TWL4030_BCIMFKEY); - if (status < 0) - return status; - status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, - (reg & 0x100) ? 3 : 2, - TWL4030_BCIIREF2); - if (status < 0) - return status; - /* disable write protection for one write access for - * BCIIREF */ - status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, - TWL4030_BCIMFKEY); - if (status < 0) - return status; - status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, - reg & 0xff, - TWL4030_BCIIREF1); - } - if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) { - /* Flip CGAIN and re-enable charging */ - bcictl1 ^= TWL4030_CGAIN; - twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, - bcictl1, TWL4030_BCICTL1); - twl4030_clear_set_boot_bci(0, boot_bci); - } - return 0; -} - -static int twl4030_charger_get_current(void); - -static void twl4030_current_worker(struct work_struct *data) -{ - int v, curr; - int res; - struct twl4030_bci *bci = container_of(data, struct twl4030_bci, - current_worker.work); - - res = twl4030bci_read_adc_val(TWL4030_BCIVBUS); - if (res < 0) - v = 0; - else - /* BCIVBUS uses ADCIN8, 7/1023 V/step */ - v = res * 6843; - curr = twl4030_charger_get_current(); - - dev_dbg(bci->dev, "v=%d cur=%d limit=%d target=%d\n", v, curr, - bci->usb_cur, bci->usb_cur_target); - - if (v < USB_MIN_VOLT) { - /* Back up and stop adjusting. */ - bci->usb_cur -= USB_CUR_STEP; - bci->usb_cur_target = bci->usb_cur; - } else if (bci->usb_cur >= bci->usb_cur_target || - bci->usb_cur + USB_CUR_STEP > USB_MAX_CURRENT) { - /* Reached target and voltage is OK - stop */ - return; - } else { - bci->usb_cur += USB_CUR_STEP; - schedule_delayed_work(&bci->current_worker, USB_CUR_DELAY); - } - twl4030_charger_update_current(bci); -} - -/* - * Enable/Disable USB Charge functionality. - */ -static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) -{ - int ret; - - if (bci->usb_mode == CHARGE_OFF) - enable = false; - if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { - - twl4030_charger_update_current(bci); - - /* Need to keep phy powered */ - if (!bci->usb_enabled) { - pm_runtime_get_sync(bci->transceiver->dev); - bci->usb_enabled = 1; - } - - if (bci->usb_mode == CHARGE_AUTO) - /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ - ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); - - /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ - ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, - TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); - if (bci->usb_mode == CHARGE_LINEAR) { - twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC|TWL4030_CVENAC, 0); - /* Watch dog key: WOVF acknowledge */ - ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x33, - TWL4030_BCIWDKEY); - /* 0x24 + EKEY6: off mode */ - ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a, - TWL4030_BCIMDKEY); - /* EKEY2: Linear charge: USB path */ - ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x26, - TWL4030_BCIMDKEY); - /* WDKEY5: stop watchdog count */ - ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf3, - TWL4030_BCIWDKEY); - /* enable MFEN3 access */ - ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x9c, - TWL4030_BCIMFKEY); - /* ICHGEOCEN - end-of-charge monitor (current < 80mA) - * (charging continues) - * ICHGLOWEN - current level monitor (charge continues) - * don't monitor over-current or heat save - */ - ret = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xf0, - TWL4030_BCIMFEN3); - } - } else { - ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); - ret |= twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0x2a, - TWL4030_BCIMDKEY); - if (bci->usb_enabled) { - pm_runtime_mark_last_busy(bci->transceiver->dev); - pm_runtime_put_autosuspend(bci->transceiver->dev); - bci->usb_enabled = 0; - } - bci->usb_cur = 0; - } - - return ret; -} - -/* - * Enable/Disable AC Charge funtionality. - */ -static int twl4030_charger_enable_ac(struct twl4030_bci *bci, bool enable) -{ - int ret; - - if (bci->ac_mode == CHARGE_OFF) - enable = false; - - if (enable) - ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); - else - ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); - - return ret; -} - -/* - * Enable/Disable charging of Backup Battery. - */ -static int twl4030_charger_enable_backup(int uvolt, int uamp) -{ - int ret; - u8 flags; - - if (uvolt < 2500000 || - uamp < 25) { - /* disable charging of backup battery */ - ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, - TWL4030_BBCHEN, 0, TWL4030_BB_CFG); - return ret; - } - - flags = TWL4030_BBCHEN; - if (uvolt >= 3200000) - flags |= TWL4030_BBSEL_3V2; - else if (uvolt >= 3100000) - flags |= TWL4030_BBSEL_3V1; - else if (uvolt >= 3000000) - flags |= TWL4030_BBSEL_3V0; - else - flags |= TWL4030_BBSEL_2V5; - - if (uamp >= 1000) - flags |= TWL4030_BBISEL_1000uA; - else if (uamp >= 500) - flags |= TWL4030_BBISEL_500uA; - else if (uamp >= 150) - flags |= TWL4030_BBISEL_150uA; - else - flags |= TWL4030_BBISEL_25uA; - - ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, - TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, - flags, - TWL4030_BB_CFG); - - return ret; -} - -/* - * TWL4030 CHG_PRES (AC charger presence) events - */ -static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) -{ - struct twl4030_bci *bci = arg; - - dev_dbg(bci->dev, "CHG_PRES irq\n"); - /* reset current on each 'plug' event */ - bci->ac_cur = 500000; - twl4030_charger_update_current(bci); - power_supply_changed(bci->ac); - power_supply_changed(bci->usb); - - return IRQ_HANDLED; -} - -/* - * TWL4030 BCI monitoring events - */ -static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) -{ - struct twl4030_bci *bci = arg; - u8 irqs1, irqs2; - int ret; - - ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, - TWL4030_INTERRUPTS_BCIISR1A); - if (ret < 0) - return IRQ_HANDLED; - - ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, - TWL4030_INTERRUPTS_BCIISR2A); - if (ret < 0) - return IRQ_HANDLED; - - dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); - - if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { - /* charger state change, inform the core */ - power_supply_changed(bci->ac); - power_supply_changed(bci->usb); - } - twl4030_charger_update_current(bci); - - /* various monitoring events, for now we just log them here */ - if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) - dev_warn(bci->dev, "battery temperature out of range\n"); - - if (irqs1 & TWL4030_BATSTS) - dev_crit(bci->dev, "battery disconnected\n"); - - if (irqs2 & TWL4030_VBATOV) - dev_crit(bci->dev, "VBAT overvoltage\n"); - - if (irqs2 & TWL4030_VBUSOV) - dev_crit(bci->dev, "VBUS overvoltage\n"); - - if (irqs2 & TWL4030_ACCHGOV) - dev_crit(bci->dev, "Ac charger overvoltage\n"); - - return IRQ_HANDLED; -} - -/* - * Provide "max_current" attribute in sysfs. - */ -static ssize_t -twl4030_bci_max_current_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t n) -{ - struct twl4030_bci *bci = dev_get_drvdata(dev->parent); - int cur = 0; - int status = 0; - status = kstrtoint(buf, 10, &cur); - if (status) - return status; - if (cur < 0) - return -EINVAL; - if (dev == &bci->ac->dev) - bci->ac_cur = cur; - else - bci->usb_cur_target = cur; - - twl4030_charger_update_current(bci); - return n; -} - -/* - * sysfs max_current show - */ -static ssize_t twl4030_bci_max_current_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - int status = 0; - int cur = -1; - u8 bcictl1; - struct twl4030_bci *bci = dev_get_drvdata(dev->parent); - - if (dev == &bci->ac->dev) { - if (!bci->ac_is_active) - cur = bci->ac_cur; - } else { - if (bci->ac_is_active) - cur = bci->usb_cur_target; - } - if (cur < 0) { - cur = twl4030bci_read_adc_val(TWL4030_BCIIREF1); - if (cur < 0) - return cur; - status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); - if (status < 0) - return status; - cur = regval2ua(cur, bcictl1 & TWL4030_CGAIN); - } - return scnprintf(buf, PAGE_SIZE, "%u\n", cur); -} - -static DEVICE_ATTR(max_current, 0644, twl4030_bci_max_current_show, - twl4030_bci_max_current_store); - -static void twl4030_bci_usb_work(struct work_struct *data) -{ - struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); - - switch (bci->event) { - case USB_EVENT_VBUS: - case USB_EVENT_CHARGER: - twl4030_charger_enable_usb(bci, true); - break; - case USB_EVENT_NONE: - twl4030_charger_enable_usb(bci, false); - break; - } -} - -static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, - void *priv) -{ - struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); - - dev_dbg(bci->dev, "OTG notify %lu\n", val); - - /* reset current on each 'plug' event */ - if (allow_usb) - bci->usb_cur_target = 500000; - else - bci->usb_cur_target = 100000; - - bci->event = val; - schedule_work(&bci->work); - - return NOTIFY_OK; -} - -/* - * sysfs charger enabled store - */ -static ssize_t -twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t n) -{ - struct twl4030_bci *bci = dev_get_drvdata(dev->parent); - int mode; - int status; - - if (sysfs_streq(buf, modes[0])) - mode = 0; - else if (sysfs_streq(buf, modes[1])) - mode = 1; - else if (sysfs_streq(buf, modes[2])) - mode = 2; - else - return -EINVAL; - if (dev == &bci->ac->dev) { - if (mode == 2) - return -EINVAL; - twl4030_charger_enable_ac(bci, false); - bci->ac_mode = mode; - status = twl4030_charger_enable_ac(bci, true); - } else { - twl4030_charger_enable_usb(bci, false); - bci->usb_mode = mode; - status = twl4030_charger_enable_usb(bci, true); - } - return (status == 0) ? n : status; -} - -/* - * sysfs charger enabled show - */ -static ssize_t -twl4030_bci_mode_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct twl4030_bci *bci = dev_get_drvdata(dev->parent); - int len = 0; - int i; - int mode = bci->usb_mode; - - if (dev == &bci->ac->dev) - mode = bci->ac_mode; - - for (i = 0; i < ARRAY_SIZE(modes); i++) - if (mode == i) - len += snprintf(buf+len, PAGE_SIZE-len, - "[%s] ", modes[i]); - else - len += snprintf(buf+len, PAGE_SIZE-len, - "%s ", modes[i]); - buf[len-1] = '\n'; - return len; -} -static DEVICE_ATTR(mode, 0644, twl4030_bci_mode_show, - twl4030_bci_mode_store); - -static int twl4030_charger_get_current(void) -{ - int curr; - int ret; - u8 bcictl1; - - curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); - if (curr < 0) - return curr; - - ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); - if (ret) - return ret; - - return regval2ua(curr, bcictl1 & TWL4030_CGAIN); -} - -/* - * Returns the main charge FSM state - * Or < 0 on failure. - */ -static int twl4030bci_state(struct twl4030_bci *bci) -{ - int ret; - u8 state; - - ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); - if (ret) { - pr_err("twl4030_bci: error reading BCIMSTATEC\n"); - return ret; - } - - dev_dbg(bci->dev, "state: %02x\n", state); - - return state; -} - -static int twl4030_bci_state_to_status(int state) -{ - state &= TWL4030_MSTATEC_MASK; - if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) - return POWER_SUPPLY_STATUS_CHARGING; - else if (TWL4030_MSTATEC_COMPLETE1 <= state && - state <= TWL4030_MSTATEC_COMPLETE4) - return POWER_SUPPLY_STATUS_FULL; - else - return POWER_SUPPLY_STATUS_NOT_CHARGING; -} - -static int twl4030_bci_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); - int is_charging; - int state; - int ret; - - state = twl4030bci_state(bci); - if (state < 0) - return state; - - if (psy->desc->type == POWER_SUPPLY_TYPE_USB) - is_charging = state & TWL4030_MSTATEC_USB; - else - is_charging = state & TWL4030_MSTATEC_AC; - if (!is_charging) { - u8 s; - twl4030_bci_read(TWL4030_BCIMDEN, &s); - if (psy->desc->type == POWER_SUPPLY_TYPE_USB) - is_charging = s & 1; - else - is_charging = s & 2; - if (is_charging) - /* A little white lie */ - state = TWL4030_MSTATEC_QUICK1; - } - - switch (psp) { - case POWER_SUPPLY_PROP_STATUS: - if (is_charging) - val->intval = twl4030_bci_state_to_status(state); - else - val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; - break; - case POWER_SUPPLY_PROP_VOLTAGE_NOW: - /* charging must be active for meaningful result */ - if (!is_charging) - return -ENODATA; - if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { - ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); - if (ret < 0) - return ret; - /* BCIVBUS uses ADCIN8, 7/1023 V/step */ - val->intval = ret * 6843; - } else { - ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); - if (ret < 0) - return ret; - /* BCIVAC uses ADCIN11, 10/1023 V/step */ - val->intval = ret * 9775; - } - break; - case POWER_SUPPLY_PROP_CURRENT_NOW: - if (!is_charging) - return -ENODATA; - /* current measurement is shared between AC and USB */ - ret = twl4030_charger_get_current(); - if (ret < 0) - return ret; - val->intval = ret; - break; - case POWER_SUPPLY_PROP_ONLINE: - val->intval = is_charging && - twl4030_bci_state_to_status(state) != - POWER_SUPPLY_STATUS_NOT_CHARGING; - break; - default: - return -EINVAL; - } - - return 0; -} - -static enum power_supply_property twl4030_charger_props[] = { - POWER_SUPPLY_PROP_STATUS, - POWER_SUPPLY_PROP_ONLINE, - POWER_SUPPLY_PROP_VOLTAGE_NOW, - POWER_SUPPLY_PROP_CURRENT_NOW, -}; - -#ifdef CONFIG_OF -static const struct twl4030_bci_platform_data * -twl4030_bci_parse_dt(struct device *dev) -{ - struct device_node *np = dev->of_node; - struct twl4030_bci_platform_data *pdata; - u32 num; - - if (!np) - return NULL; - pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) - return pdata; - - if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) - pdata->bb_uvolt = num; - if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) - pdata->bb_uamp = num; - return pdata; -} -#else -static inline const struct twl4030_bci_platform_data * -twl4030_bci_parse_dt(struct device *dev) -{ - return NULL; -} -#endif - -static const struct power_supply_desc twl4030_bci_ac_desc = { - .name = "twl4030_ac", - .type = POWER_SUPPLY_TYPE_MAINS, - .properties = twl4030_charger_props, - .num_properties = ARRAY_SIZE(twl4030_charger_props), - .get_property = twl4030_bci_get_property, -}; - -static const struct power_supply_desc twl4030_bci_usb_desc = { - .name = "twl4030_usb", - .type = POWER_SUPPLY_TYPE_USB, - .properties = twl4030_charger_props, - .num_properties = ARRAY_SIZE(twl4030_charger_props), - .get_property = twl4030_bci_get_property, -}; - -static int twl4030_bci_probe(struct platform_device *pdev) -{ - struct twl4030_bci *bci; - const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; - int ret; - u32 reg; - - bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL); - if (bci == NULL) - return -ENOMEM; - - if (!pdata) - pdata = twl4030_bci_parse_dt(&pdev->dev); - - bci->ichg_eoc = 80100; /* Stop charging when current drops to here */ - bci->ichg_lo = 241000; /* Low threshold */ - bci->ichg_hi = 500000; /* High threshold */ - bci->ac_cur = 500000; /* 500mA */ - if (allow_usb) - bci->usb_cur_target = 500000; /* 500mA */ - else - bci->usb_cur_target = 100000; /* 100mA */ - bci->usb_mode = CHARGE_AUTO; - bci->ac_mode = CHARGE_AUTO; - - bci->dev = &pdev->dev; - bci->irq_chg = platform_get_irq(pdev, 0); - bci->irq_bci = platform_get_irq(pdev, 1); - - /* Only proceed further *IF* battery is physically present */ - ret = twl4030_is_battery_present(bci); - if (ret) { - dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret); - return ret; - } - - platform_set_drvdata(pdev, bci); - - bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, - NULL); - if (IS_ERR(bci->ac)) { - ret = PTR_ERR(bci->ac); - dev_err(&pdev->dev, "failed to register ac: %d\n", ret); - return ret; - } - - bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, - NULL); - if (IS_ERR(bci->usb)) { - ret = PTR_ERR(bci->usb); - dev_err(&pdev->dev, "failed to register usb: %d\n", ret); - return ret; - } - - ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL, - twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, - bci); - if (ret < 0) { - dev_err(&pdev->dev, "could not request irq %d, status %d\n", - bci->irq_chg, ret); - return ret; - } - - ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL, - twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); - if (ret < 0) { - dev_err(&pdev->dev, "could not request irq %d, status %d\n", - bci->irq_bci, ret); - return ret; - } - - bci->channel_vac = iio_channel_get(&pdev->dev, "vac"); - if (IS_ERR(bci->channel_vac)) { - bci->channel_vac = NULL; - dev_warn(&pdev->dev, "could not request vac iio channel"); - } - - INIT_WORK(&bci->work, twl4030_bci_usb_work); - INIT_DELAYED_WORK(&bci->current_worker, twl4030_current_worker); - - bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; - if (bci->dev->of_node) { - struct device_node *phynode; - - phynode = of_find_compatible_node(bci->dev->of_node->parent, - NULL, "ti,twl4030-usb"); - if (phynode) - bci->transceiver = devm_usb_get_phy_by_node( - bci->dev, phynode, &bci->usb_nb); - } - - /* Enable interrupts now. */ - reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | - TWL4030_TBATOR1 | TWL4030_BATSTS); - ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, - TWL4030_INTERRUPTS_BCIIMR1A); - if (ret < 0) { - dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); - goto fail; - } - - reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); - ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, - TWL4030_INTERRUPTS_BCIIMR2A); - if (ret < 0) - dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); - - twl4030_charger_update_current(bci); - if (device_create_file(&bci->usb->dev, &dev_attr_max_current)) - dev_warn(&pdev->dev, "could not create sysfs file\n"); - if (device_create_file(&bci->usb->dev, &dev_attr_mode)) - dev_warn(&pdev->dev, "could not create sysfs file\n"); - if (device_create_file(&bci->ac->dev, &dev_attr_mode)) - dev_warn(&pdev->dev, "could not create sysfs file\n"); - if (device_create_file(&bci->ac->dev, &dev_attr_max_current)) - dev_warn(&pdev->dev, "could not create sysfs file\n"); - - twl4030_charger_enable_ac(bci, true); - if (!IS_ERR_OR_NULL(bci->transceiver)) - twl4030_bci_usb_ncb(&bci->usb_nb, - bci->transceiver->last_event, - NULL); - else - twl4030_charger_enable_usb(bci, false); - if (pdata) - twl4030_charger_enable_backup(pdata->bb_uvolt, - pdata->bb_uamp); - else - twl4030_charger_enable_backup(0, 0); - - return 0; -fail: - iio_channel_release(bci->channel_vac); - - return ret; -} - -static int __exit twl4030_bci_remove(struct platform_device *pdev) -{ - struct twl4030_bci *bci = platform_get_drvdata(pdev); - - twl4030_charger_enable_ac(bci, false); - twl4030_charger_enable_usb(bci, false); - twl4030_charger_enable_backup(0, 0); - - iio_channel_release(bci->channel_vac); - - device_remove_file(&bci->usb->dev, &dev_attr_max_current); - device_remove_file(&bci->usb->dev, &dev_attr_mode); - device_remove_file(&bci->ac->dev, &dev_attr_max_current); - device_remove_file(&bci->ac->dev, &dev_attr_mode); - /* mask interrupts */ - twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, - TWL4030_INTERRUPTS_BCIIMR1A); - twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, - TWL4030_INTERRUPTS_BCIIMR2A); - - return 0; -} - -static const struct of_device_id twl_bci_of_match[] = { - {.compatible = "ti,twl4030-bci", }, - { } -}; -MODULE_DEVICE_TABLE(of, twl_bci_of_match); - -static struct platform_driver twl4030_bci_driver = { - .probe = twl4030_bci_probe, - .driver = { - .name = "twl4030_bci", - .of_match_table = of_match_ptr(twl_bci_of_match), - }, - .remove = __exit_p(twl4030_bci_remove), -}; -module_platform_driver(twl4030_bci_driver); - -MODULE_AUTHOR("Gražvydas Ignotas"); -MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:twl4030_bci"); |