/* * 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) */ 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 tps65010_set_led(offset - 3, value ? ON : OFF); } 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 tps65010_set_led(offset - 3, value ? ON : OFF); 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.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 = 6; 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 }, { } }; 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);