diff options
Diffstat (limited to 'drivers/i2c/chips/tps65010.c')
| -rw-r--r-- | drivers/i2c/chips/tps65010.c | 1072 |
1 files changed, 0 insertions, 1072 deletions
diff --git a/drivers/i2c/chips/tps65010.c b/drivers/i2c/chips/tps65010.c deleted file mode 100644 index acf8b9d5f575..000000000000 --- a/drivers/i2c/chips/tps65010.c +++ /dev/null @@ -1,1072 +0,0 @@ -/* - * tps65010 - driver for tps6501x power management chips - * - * Copyright (C) 2004 Texas Instruments - * Copyright (C) 2004-2005 David Brownell - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/i2c.h> -#include <linux/delay.h> -#include <linux/workqueue.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/mutex.h> -#include <linux/platform_device.h> - -#include <linux/i2c/tps65010.h> - -#include <asm/gpio.h> - - -/*-------------------------------------------------------------------------*/ - -#define DRIVER_VERSION "2 May 2005" -#define DRIVER_NAME (tps65010_driver.driver.name) - -MODULE_DESCRIPTION("TPS6501x Power Management Driver"); -MODULE_LICENSE("GPL"); - -static struct i2c_driver tps65010_driver; - -/*-------------------------------------------------------------------------*/ - -/* This driver handles a family of multipurpose chips, which incorporate - * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, - * and other features often needed in portable devices like cell phones - * or digital cameras. - * - * The tps65011 and tps65013 have different voltage settings compared - * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. - * All except tps65010 have "wait" mode, possibly defaulted so that - * battery-insert != device-on. - * - * We could distinguish between some models by checking VDCDC1.UVLO or - * other registers, unless they've been changed already after powerup - * as part of board setup by a bootloader. - */ -enum tps_model { - TPS65010, - TPS65011, - TPS65012, - TPS65013, -}; - -struct tps65010 { - struct i2c_client *client; - struct mutex lock; - struct delayed_work work; - struct dentry *file; - unsigned charging:1; - unsigned por:1; - unsigned model:8; - u16 vbus; - unsigned long flags; -#define FLAG_VBUS_CHANGED 0 -#define FLAG_IRQ_ENABLE 1 - - /* copies of last register state */ - u8 chgstatus, regstatus, chgconf; - u8 nmask1, nmask2; - - u8 outmask; - struct gpio_chip chip; - struct platform_device *leds; -}; - -#define POWER_POLL_DELAY msecs_to_jiffies(5000) - -/*-------------------------------------------------------------------------*/ - -#if defined(DEBUG) || defined(CONFIG_DEBUG_FS) - -static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) -{ - snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n", - chgstatus, - (chgstatus & TPS_CHG_USB) ? " USB" : "", - (chgstatus & TPS_CHG_AC) ? " AC" : "", - (chgstatus & TPS_CHG_THERM) ? " therm" : "", - (chgstatus & TPS_CHG_TERM) ? " done" : - ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) - ? " (charging)" : ""), - (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "", - (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "", - (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "", - (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : ""); -} - -static void dbg_regstat(char *buf, size_t len, u8 regstatus) -{ - snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n", - regstatus, - (regstatus & TPS_REG_ONOFF) ? "off" : "(on)", - (regstatus & TPS_REG_COVER) ? " uncover" : "", - (regstatus & TPS_REG_UVLO) ? " UVLO" : "", - (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "", - (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "", - (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "", - (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "", - (regstatus & TPS_REG_PG_CORE) ? " core_bad" : ""); -} - -static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) -{ - const char *hibit; - - if (por) - hibit = (chgconfig & TPS_CHARGE_POR) - ? "POR=69ms" : "POR=1sec"; - else - hibit = (chgconfig & TPS65013_AUA) ? "AUA" : ""; - - snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n", - chgconfig, hibit, - (chgconfig & TPS_CHARGE_RESET) ? " reset" : "", - (chgconfig & TPS_CHARGE_FAST) ? " fast" : "", - ({int p; switch ((chgconfig >> 3) & 3) { - case 3: p = 100; break; - case 2: p = 75; break; - case 1: p = 50; break; - default: p = 25; break; - }; p; }), - (chgconfig & TPS_VBUS_CHARGING) - ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) - : 0, - (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No"); -} - -#endif - -#ifdef DEBUG - -static void show_chgstatus(const char *label, u8 chgstatus) -{ - char buf [100]; - - dbg_chgstat(buf, sizeof buf, chgstatus); - pr_debug("%s: %s %s", DRIVER_NAME, label, buf); -} - -static void show_regstatus(const char *label, u8 regstatus) -{ - char buf [100]; - - dbg_regstat(buf, sizeof buf, regstatus); - pr_debug("%s: %s %s", DRIVER_NAME, label, buf); -} - -static void show_chgconfig(int por, const char *label, u8 chgconfig) -{ - char buf [100]; - - dbg_chgconf(por, buf, sizeof buf, chgconfig); - pr_debug("%s: %s %s", DRIVER_NAME, label, buf); -} - -#else - -static inline void show_chgstatus(const char *label, u8 chgstatus) { } -static inline void show_regstatus(const char *label, u8 chgstatus) { } -static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } - -#endif - -#ifdef CONFIG_DEBUG_FS - -static int dbg_show(struct seq_file *s, void *_) -{ - struct tps65010 *tps = s->private; - u8 value, v2; - unsigned i; - char buf[100]; - const char *chip; - - switch (tps->model) { - case TPS65010: chip = "tps65010"; break; - case TPS65011: chip = "tps65011"; break; - case TPS65012: chip = "tps65012"; break; - case TPS65013: chip = "tps65013"; break; - default: chip = NULL; break; - } - seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", - DRIVER_NAME, DRIVER_VERSION, chip); - - mutex_lock(&tps->lock); - - /* FIXME how can we tell whether a battery is present? - * likely involves a charge gauging chip (like BQ26501). - */ - - seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) "); - - - /* registers for monitoring battery charging and status; note - * that reading chgstat and regstat may ack IRQs... - */ - value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); - dbg_chgconf(tps->por, buf, sizeof buf, value); - seq_printf(s, "chgconfig %s", buf); - - value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); - dbg_chgstat(buf, sizeof buf, value); - seq_printf(s, "chgstat %s", buf); - value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1); - dbg_chgstat(buf, sizeof buf, value); - seq_printf(s, "mask1 %s", buf); - /* ignore ackint1 */ - - value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); - dbg_regstat(buf, sizeof buf, value); - seq_printf(s, "regstat %s", buf); - value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2); - dbg_regstat(buf, sizeof buf, value); - seq_printf(s, "mask2 %s\n", buf); - /* ignore ackint2 */ - - (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); - - - /* VMAIN voltage, enable lowpower, etc */ - value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1); - seq_printf(s, "vdcdc1 %02x\n", value); - - /* VCORE voltage, vibrator on/off */ - value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2); - seq_printf(s, "vdcdc2 %02x\n", value); - - /* both LD0s, and their lowpower behavior */ - value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1); - seq_printf(s, "vregs1 %02x\n\n", value); - - - /* LEDs and GPIOs */ - value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON); - v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER); - seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n", - (value & 0x80) - ? ((v2 & 0x80) ? "on" : "off") - : ((v2 & 0x80) ? "blink" : "(nPG)"), - value, v2, - (value & 0x7f) * 10, (v2 & 0x7f) * 100); - - value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON); - v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER); - seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n", - (value & 0x80) - ? ((v2 & 0x80) ? "on" : "off") - : ((v2 & 0x80) ? "blink" : "off"), - value, v2, - (value & 0x7f) * 10, (v2 & 0x7f) * 100); - - value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); - v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3); - seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2); - - for (i = 0; i < 4; i++) { - if (value & (1 << (4 + i))) - seq_printf(s, " gpio%d-out %s\n", i + 1, - (value & (1 << i)) ? "low" : "hi "); - else - seq_printf(s, " gpio%d-in %s %s %s\n", i + 1, - (value & (1 << i)) ? "hi " : "low", - (v2 & (1 << i)) ? "no-irq" : "irq", - (v2 & (1 << (4 + i))) ? "rising" : "falling"); - } - - mutex_unlock(&tps->lock); - return 0; -} - -static int dbg_tps_open(struct inode *inode, struct file *file) -{ - return single_open(file, dbg_show, inode->i_private); -} - -static const struct file_operations debug_fops = { - .open = dbg_tps_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -#define DEBUG_FOPS &debug_fops - -#else -#define DEBUG_FOPS NULL -#endif - -/*-------------------------------------------------------------------------*/ - -/* handle IRQS in a task context, so we can use I2C calls */ -static void tps65010_interrupt(struct tps65010 *tps) -{ - u8 tmp = 0, mask, poll; - - /* IRQs won't trigger for certain events, but we can get - * others by polling (normally, with external power applied). - */ - poll = 0; - - /* regstatus irqs */ - if (tps->nmask2) { - tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); - mask = tmp ^ tps->regstatus; - tps->regstatus = tmp; - mask &= tps->nmask2; - } else - mask = 0; - if (mask) { - tps->regstatus = tmp; - /* may need to shut something down ... */ - - /* "off" usually means deep sleep */ - if (tmp & TPS_REG_ONOFF) { - pr_info("%s: power off button\n", DRIVER_NAME); -#if 0 - /* REVISIT: this might need its own workqueue - * plus tweaks including deadlock avoidance ... - * also needs to get error handling and probably - * an #ifdef CONFIG_HIBERNATION - */ - hibernate(); -#endif - poll = 1; - } - } - - /* chgstatus irqs */ - if (tps->nmask1) { - tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); - mask = tmp ^ tps->chgstatus; - tps->chgstatus = tmp; - mask &= tps->nmask1; - } else - mask = 0; - if (mask) { - unsigned charging = 0; - - show_chgstatus("chg/irq", tmp); - if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) - show_chgconfig(tps->por, "conf", tps->chgconf); - - /* Unless it was turned off or disabled, we charge any - * battery whenever there's power available for it - * and the charger hasn't been disabled. - */ - if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) - && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) - && (tps->chgconf & TPS_CHARGE_ENABLE) - ) { - if (tps->chgstatus & TPS_CHG_USB) { - /* VBUS options are readonly until reconnect */ - if (mask & TPS_CHG_USB) - set_bit(FLAG_VBUS_CHANGED, &tps->flags); - charging = 1; - } else if (tps->chgstatus & TPS_CHG_AC) - charging = 1; - } - if (charging != tps->charging) { - tps->charging = charging; - pr_info("%s: battery %scharging\n", - DRIVER_NAME, charging ? "" : - ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) - ? "NOT " : "dis")); - } - } - - /* always poll to detect (a) power removal, without tps65013 - * NO_CHG IRQ; or (b) restart of charging after stop. - */ - if ((tps->model != TPS65013 || !tps->charging) - && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) - poll = 1; - if (poll) - (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); - - /* also potentially gpio-in rise or fall */ -} - -/* handle IRQs and polling using keventd for now */ -static void tps65010_work(struct work_struct *work) -{ - struct tps65010 *tps; - - tps = container_of(work, struct tps65010, work.work); - mutex_lock(&tps->lock); - - tps65010_interrupt(tps); - - if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { - int status; - u8 chgconfig, tmp; - - chgconfig = i2c_smbus_read_byte_data(tps->client, - TPS_CHGCONFIG); - chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); - if (tps->vbus == 500) - chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; - else if (tps->vbus >= 100) - chgconfig |= TPS_VBUS_CHARGING; - - status = i2c_smbus_write_byte_data(tps->client, - TPS_CHGCONFIG, chgconfig); - - /* vbus update fails unless VBUS is connected! */ - tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); - tps->chgconf = tmp; - show_chgconfig(tps->por, "update vbus", tmp); - } - - if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) - enable_irq(tps->client->irq); - - mutex_unlock(&tps->lock); -} - -static irqreturn_t tps65010_irq(int irq, void *_tps) -{ - struct tps65010 *tps = _tps; - - disable_irq_nosync(irq); - set_bit(FLAG_IRQ_ENABLE, &tps->flags); - (void) schedule_work(&tps->work.work); - return IRQ_HANDLED; -} - -/*-------------------------------------------------------------------------*/ - -/* offsets 0..3 == GPIO1..GPIO4 - * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes) - * offset 6 == vibrator motor driver - */ -static void -tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - if (offset < 4) - tps65010_set_gpio_out_value(offset + 1, value); - else if (offset < 6) - tps65010_set_led(offset - 3, value ? ON : OFF); - else - tps65010_set_vib(value); -} - -static int -tps65010_output(struct gpio_chip *chip, unsigned offset, int value) -{ - /* GPIOs may be input-only */ - if (offset < 4) { - struct tps65010 *tps; - - tps = container_of(chip, struct tps65010, chip); - if (!(tps->outmask & (1 << offset))) - return -EINVAL; - tps65010_set_gpio_out_value(offset + 1, value); - } else if (offset < 6) - tps65010_set_led(offset - 3, value ? ON : OFF); - else - tps65010_set_vib(value); - - return 0; -} - -static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - int value; - struct tps65010 *tps; - - tps = container_of(chip, struct tps65010, chip); - - if (offset < 4) { - value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); - if (value < 0) - return 0; - if (value & (1 << (offset + 4))) /* output */ - return !(value & (1 << offset)); - else /* input */ - return (value & (1 << offset)); - } - - /* REVISIT we *could* report LED1/nPG and LED2 state ... */ - return 0; -} - - -/*-------------------------------------------------------------------------*/ - -static struct tps65010 *the_tps; - -static int __exit tps65010_remove(struct i2c_client *client) -{ - struct tps65010 *tps = i2c_get_clientdata(client); - struct tps65010_board *board = client->dev.platform_data; - - if (board && board->teardown) { - int status = board->teardown(client, board->context); - if (status < 0) - dev_dbg(&client->dev, "board %s %s err %d\n", - "teardown", client->name, status); - } - if (client->irq > 0) - free_irq(client->irq, tps); - cancel_delayed_work(&tps->work); - flush_scheduled_work(); - debugfs_remove(tps->file); - kfree(tps); - i2c_set_clientdata(client, NULL); - the_tps = NULL; - return 0; -} - -static int tps65010_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct tps65010 *tps; - int status; - struct tps65010_board *board = client->dev.platform_data; - - if (the_tps) { - dev_dbg(&client->dev, "only one tps6501x chip allowed\n"); - return -ENODEV; - } - - if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - return -EINVAL; - - tps = kzalloc(sizeof *tps, GFP_KERNEL); - if (!tps) - return -ENOMEM; - - mutex_init(&tps->lock); - INIT_DELAYED_WORK(&tps->work, tps65010_work); - tps->client = client; - tps->model = id->driver_data; - - /* the IRQ is active low, but many gpio lines can't support that - * so this driver uses falling-edge triggers instead. - */ - if (client->irq > 0) { - status = request_irq(client->irq, tps65010_irq, - IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING, - DRIVER_NAME, tps); - if (status < 0) { - dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", - client->irq, status); - goto fail1; - } - /* annoying race here, ideally we'd have an option - * to claim the irq now and enable it later. - * FIXME genirq IRQF_NOAUTOEN now solves that ... - */ - disable_irq(client->irq); - set_bit(FLAG_IRQ_ENABLE, &tps->flags); - } else - dev_warn(&client->dev, "IRQ not configured!\n"); - - - switch (tps->model) { - case TPS65010: - case TPS65012: - tps->por = 1; - break; - /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ - } - tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); - show_chgconfig(tps->por, "conf/init", tps->chgconf); - - show_chgstatus("chg/init", - i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); - show_regstatus("reg/init", - i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); - - pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, - i2c_smbus_read_byte_data(client, TPS_VDCDC1), - i2c_smbus_read_byte_data(client, TPS_VDCDC2), - i2c_smbus_read_byte_data(client, TPS_VREGS1)); - pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, - i2c_smbus_read_byte_data(client, TPS_DEFGPIO), - i2c_smbus_read_byte_data(client, TPS_MASK3)); - - i2c_set_clientdata(client, tps); - the_tps = tps; - -#if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) - /* USB hosts can't draw VBUS. OTG devices could, later - * when OTG infrastructure enables it. USB peripherals - * could be relying on VBUS while booting, though. - */ - tps->vbus = 100; -#endif - - /* unmask the "interesting" irqs, then poll once to - * kickstart monitoring, initialize shadowed status - * registers, and maybe disable VBUS draw. - */ - tps->nmask1 = ~0; - (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1); - - tps->nmask2 = TPS_REG_ONOFF; - if (tps->model == TPS65013) - tps->nmask2 |= TPS_REG_NO_CHG; - (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2); - - (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f - | i2c_smbus_read_byte_data(client, TPS_MASK3)); - - tps65010_work(&tps->work.work); - - tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, - tps, DEBUG_FOPS); - - /* optionally register GPIOs */ - if (board && board->base > 0) { - tps->outmask = board->outmask; - - tps->chip.label = client->name; - tps->chip.dev = &client->dev; - tps->chip.owner = THIS_MODULE; - - tps->chip.set = tps65010_gpio_set; - tps->chip.direction_output = tps65010_output; - - /* NOTE: only partial support for inputs; nyet IRQs */ - tps->chip.get = tps65010_gpio_get; - - tps->chip.base = board->base; - tps->chip.ngpio = 7; - tps->chip.can_sleep = 1; - - status = gpiochip_add(&tps->chip); - if (status < 0) - dev_err(&client->dev, "can't add gpiochip, err %d\n", - status); - else if (board->setup) { - status = board->setup(client, board->context); - if (status < 0) { - dev_dbg(&client->dev, - "board %s %s err %d\n", - "setup", client->name, status); - status = 0; - } - } - } - - return 0; -fail1: - kfree(tps); - return status; -} - -static const struct i2c_device_id tps65010_id[] = { - { "tps65010", TPS65010 }, - { "tps65011", TPS65011 }, - { "tps65012", TPS65012 }, - { "tps65013", TPS65013 }, - { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */ - { } -}; -MODULE_DEVICE_TABLE(i2c, tps65010_id); - -static struct i2c_driver tps65010_driver = { - .driver = { - .name = "tps65010", - }, - .probe = tps65010_probe, - .remove = __exit_p(tps65010_remove), - .id_table = tps65010_id, -}; - -/*-------------------------------------------------------------------------*/ - -/* Draw from VBUS: - * 0 mA -- DON'T DRAW (might supply power instead) - * 100 mA -- usb unit load (slowest charge rate) - * 500 mA -- usb high power (fast battery charge) - */ -int tps65010_set_vbus_draw(unsigned mA) -{ - unsigned long flags; - - if (!the_tps) - return -ENODEV; - - /* assumes non-SMP */ - local_irq_save(flags); - if (mA >= 500) - mA = 500; - else if (mA >= 100) - mA = 100; - else - mA = 0; - the_tps->vbus = mA; - if ((the_tps->chgstatus & TPS_CHG_USB) - && test_and_set_bit( - FLAG_VBUS_CHANGED, &the_tps->flags)) { - /* gadget drivers call this in_irq() */ - (void) schedule_work(&the_tps->work.work); - } - local_irq_restore(flags); - - return 0; -} -EXPORT_SYMBOL(tps65010_set_vbus_draw); - -/*-------------------------------------------------------------------------*/ -/* tps65010_set_gpio_out_value parameter: - * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 - * value: LOW or HIGH - */ -int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) -{ - int status; - unsigned defgpio; - - if (!the_tps) - return -ENODEV; - if ((gpio < GPIO1) || (gpio > GPIO4)) - return -EINVAL; - - mutex_lock(&the_tps->lock); - - defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO); - - /* Configure GPIO for output */ - defgpio |= 1 << (gpio + 3); - - /* Writing 1 forces a logic 0 on that GPIO and vice versa */ - switch (value) { - case LOW: - defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ - break; - /* case HIGH: */ - default: - defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ - break; - } - - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_DEFGPIO, defgpio); - - pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, - gpio, value ? "high" : "low", - i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); - - mutex_unlock(&the_tps->lock); - return status; -} -EXPORT_SYMBOL(tps65010_set_gpio_out_value); - -/*-------------------------------------------------------------------------*/ -/* tps65010_set_led parameter: - * led: LED1 or LED2 - * mode: ON, OFF or BLINK - */ -int tps65010_set_led(unsigned led, unsigned mode) -{ - int status; - unsigned led_on, led_per, offs; - - if (!the_tps) - return -ENODEV; - - if (led == LED1) - offs = 0; - else { - offs = 2; - led = LED2; - } - - mutex_lock(&the_tps->lock); - - pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, - i2c_smbus_read_byte_data(the_tps->client, - TPS_LED1_ON + offs)); - - pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, - i2c_smbus_read_byte_data(the_tps->client, - TPS_LED1_PER + offs)); - - switch (mode) { - case OFF: - led_on = 1 << 7; - led_per = 0 << 7; - break; - case ON: - led_on = 1 << 7; - led_per = 1 << 7; - break; - case BLINK: - led_on = 0x30 | (0 << 7); - led_per = 0x08 | (1 << 7); - break; - default: - printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", - DRIVER_NAME); - mutex_unlock(&the_tps->lock); - return -EINVAL; - } - - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_LED1_ON + offs, led_on); - - if (status != 0) { - printk(KERN_ERR "%s: Failed to write led%i_on register\n", - DRIVER_NAME, led); - mutex_unlock(&the_tps->lock); - return status; - } - - pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, - i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); - - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_LED1_PER + offs, led_per); - - if (status != 0) { - printk(KERN_ERR "%s: Failed to write led%i_per register\n", - DRIVER_NAME, led); - mutex_unlock(&the_tps->lock); - return status; - } - - pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, - i2c_smbus_read_byte_data(the_tps->client, - TPS_LED1_PER + offs)); - - mutex_unlock(&the_tps->lock); - - return status; -} -EXPORT_SYMBOL(tps65010_set_led); - -/*-------------------------------------------------------------------------*/ -/* tps65010_set_vib parameter: - * value: ON or OFF - */ -int tps65010_set_vib(unsigned value) -{ - int status; - unsigned vdcdc2; - - if (!the_tps) - return -ENODEV; - - mutex_lock(&the_tps->lock); - - vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2); - vdcdc2 &= ~(1 << 1); - if (value) - vdcdc2 |= (1 << 1); - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_VDCDC2, vdcdc2); - - pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); - - mutex_unlock(&the_tps->lock); - return status; -} -EXPORT_SYMBOL(tps65010_set_vib); - -/*-------------------------------------------------------------------------*/ -/* tps65010_set_low_pwr parameter: - * mode: ON or OFF - */ -int tps65010_set_low_pwr(unsigned mode) -{ - int status; - unsigned vdcdc1; - - if (!the_tps) - return -ENODEV; - - mutex_lock(&the_tps->lock); - - pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, - mode ? "enable" : "disable", - i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); - - vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); - - switch (mode) { - case OFF: - vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ - break; - /* case ON: */ - default: - vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ - break; - } - - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_VDCDC1, vdcdc1); - - if (status != 0) - printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", - DRIVER_NAME); - else - pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, - i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); - - mutex_unlock(&the_tps->lock); - - return status; -} -EXPORT_SYMBOL(tps65010_set_low_pwr); - -/*-------------------------------------------------------------------------*/ -/* tps65010_config_vregs1 parameter: - * value to be written to VREGS1 register - * Note: The complete register is written, set all bits you need - */ -int tps65010_config_vregs1(unsigned value) -{ - int status; - - if (!the_tps) - return -ENODEV; - - mutex_lock(&the_tps->lock); - - pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, - i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); - - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_VREGS1, value); - - if (status != 0) - printk(KERN_ERR "%s: Failed to write vregs1 register\n", - DRIVER_NAME); - else - pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, - i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); - - mutex_unlock(&the_tps->lock); - - return status; -} -EXPORT_SYMBOL(tps65010_config_vregs1); - -/*-------------------------------------------------------------------------*/ -/* tps65013_set_low_pwr parameter: - * mode: ON or OFF - */ - -/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not - required if power supply is through a battery */ - -int tps65013_set_low_pwr(unsigned mode) -{ - int status; - unsigned vdcdc1, chgconfig; - - if (!the_tps || the_tps->por) - return -ENODEV; - - mutex_lock(&the_tps->lock); - - pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", - DRIVER_NAME, - mode ? "enable" : "disable", - i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), - i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); - - chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); - vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); - - switch (mode) { - case OFF: - chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ - vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ - break; - /* case ON: */ - default: - chgconfig |= TPS65013_AUA; /* enable AUA bit */ - vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ - break; - } - - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_CHGCONFIG, chgconfig); - if (status != 0) { - printk(KERN_ERR "%s: Failed to write chconfig register\n", - DRIVER_NAME); - mutex_unlock(&the_tps->lock); - return status; - } - - chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); - the_tps->chgconf = chgconfig; - show_chgconfig(0, "chgconf", chgconfig); - - status = i2c_smbus_write_byte_data(the_tps->client, - TPS_VDCDC1, vdcdc1); - - if (status != 0) - printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", - DRIVER_NAME); - else - pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, - i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); - - mutex_unlock(&the_tps->lock); - - return status; -} -EXPORT_SYMBOL(tps65013_set_low_pwr); - -/*-------------------------------------------------------------------------*/ - -static int __init tps_init(void) -{ - u32 tries = 3; - int status = -ENODEV; - - printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION); - - /* some boards have startup glitches */ - while (tries--) { - status = i2c_add_driver(&tps65010_driver); - if (the_tps) - break; - i2c_del_driver(&tps65010_driver); - if (!tries) { - printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME); - return -ENODEV; - } - pr_debug("%s: re-probe ...\n", DRIVER_NAME); - msleep(10); - } - - return status; -} -/* NOTE: this MUST be initialized before the other parts of the system - * that rely on it ... but after the i2c bus on which this relies. - * That is, much earlier than on PC-type systems, which don't often use - * I2C as a core system bus. - */ -subsys_initcall(tps_init); - -static void __exit tps_exit(void) -{ - i2c_del_driver(&tps65010_driver); -} -module_exit(tps_exit); - |