diff options
Diffstat (limited to 'drivers/i2c/chips/tps65010.c')
| -rw-r--r-- | drivers/i2c/chips/tps65010.c | 1072 |
1 files changed, 1072 insertions, 0 deletions
diff --git a/drivers/i2c/chips/tps65010.c b/drivers/i2c/chips/tps65010.c new file mode 100644 index 0000000..c0ac01b --- /dev/null +++ b/drivers/i2c/chips/tps65010.c @@ -0,0 +1,1072 @@ +/* + * 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. + */ +#undef DEBUG + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/workqueue.h> +#include <linux/suspend.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> + +#include <asm/irq.h> +#include <asm/mach-types.h> + +#include <asm/arch/gpio.h> +#include <asm/arch/mux.h> +#include <asm/arch/tps65010.h> + +/*-------------------------------------------------------------------------*/ + +#define DRIVER_VERSION "2 May 2005" +#define DRIVER_NAME (tps65010_driver.name) + +MODULE_DESCRIPTION("TPS6501x Power Management Driver"); +MODULE_LICENSE("GPL"); + +/* only two addresses possible */ +#define TPS_BASE 0x48 +static unsigned short normal_i2c[] = { + TPS_BASE, + I2C_CLIENT_END }; +static unsigned short normal_i2c_range[] = { I2C_CLIENT_END }; + +I2C_CLIENT_INSMOD; + +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 { + TPS_UNKNOWN = 0, + TPS65010, + TPS65011, + TPS65012, + TPS65013, +}; + +struct tps65010 { + struct i2c_client client; + struct semaphore lock; + int irq; + struct work_struct 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; + + /* plus four GPIOs, probably used to switch power */ +}; + +#define POWER_POLL_DELAY msecs_to_jiffies(800) + +/*-------------------------------------------------------------------------*/ + +#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) ? " ld01_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) +{ + 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); + + down(&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"); + } + + up(&tps->lock); + return 0; +} + +static int dbg_tps_open(struct inode *inode, struct file *file) +{ + return single_open(file, dbg_show, inode->u.generic_ip); +} + +static 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 irqs 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 ... + */ + software_suspend(); +#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(void *_tps) +{ + struct tps65010 *tps = _tps; + + down(&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->irq); + + up(&tps->lock); +} + +static irqreturn_t tps65010_irq(int irq, void *_tps, struct pt_regs *regs) +{ + struct tps65010 *tps = _tps; + + disable_irq_nosync(irq); + set_bit(FLAG_IRQ_ENABLE, &tps->flags); + (void) schedule_work(&tps->work); + return IRQ_HANDLED; +} + +/*-------------------------------------------------------------------------*/ + +static struct tps65010 *the_tps; + +static int __exit tps65010_detach_client(struct i2c_client *client) +{ + struct tps65010 *tps; + + tps = container_of(client, struct tps65010, client); +#ifdef CONFIG_ARM + if (machine_is_omap_h2()) + omap_free_gpio(58); + if (machine_is_omap_osk()) + omap_free_gpio(OMAP_MPUIO(1)); +#endif + free_irq(tps->irq, tps); + debugfs_remove(tps->file); + if (i2c_detach_client(client) == 0) + kfree(tps); + the_tps = 0; + return 0; +} + +static int tps65010_noscan(struct i2c_adapter *bus) +{ + /* pure paranoia, in case someone adds another i2c bus + * after our init section's gone... + */ + return -ENODEV; +} + +/* no error returns, they'd just make bus scanning stop */ +static int __init +tps65010_probe(struct i2c_adapter *bus, int address, int kind) +{ + struct tps65010 *tps; + int status; + + if (the_tps) { + dev_dbg(&bus->dev, "only one %s for now\n", DRIVER_NAME); + return 0; + } + + tps = kmalloc(sizeof *tps, GFP_KERNEL); + if (!tps) + return 0; + + memset(tps, 0, sizeof *tps); + init_MUTEX(&tps->lock); + INIT_WORK(&tps->work, tps65010_work, tps); + tps->irq = -1; + tps->client.addr = address; + i2c_set_clientdata(&tps->client, tps); + tps->client.adapter = bus; + tps->client.driver = &tps65010_driver; + strlcpy(tps->client.name, DRIVER_NAME, I2C_NAME_SIZE); + + status = i2c_attach_client(&tps->client); + if (status < 0) { + dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n", + DRIVER_NAME, address, status); +fail1: + kfree(tps); + return 0; + } + +#ifdef CONFIG_ARM + if (machine_is_omap_h2()) { + tps->model = TPS65010; + omap_cfg_reg(W4_GPIO58); + tps->irq = OMAP_GPIO_IRQ(58); + omap_request_gpio(58); + omap_set_gpio_direction(58, 1); + omap_set_gpio_edge_ctrl(58, OMAP_GPIO_FALLING_EDGE); + } + if (machine_is_omap_osk()) { + tps->model = TPS65010; + // omap_cfg_reg(U19_1610_MPUIO1); + tps->irq = OMAP_GPIO_IRQ(OMAP_MPUIO(1)); + omap_request_gpio(OMAP_MPUIO(1)); + omap_set_gpio_direction(OMAP_MPUIO(1), 1); + omap_set_gpio_edge_ctrl(OMAP_MPUIO(1), OMAP_GPIO_FALLING_EDGE); + } + if (machine_is_omap_h3()) { + tps->model = TPS65013; + + // FIXME set up this board's IRQ ... + } +#else +#define set_irq_type(num,trigger) do{}while(0) +#endif + + if (tps->irq > 0) { + set_irq_type(tps->irq, IRQT_LOW); + status = request_irq(tps->irq, tps65010_irq, + SA_SAMPLE_RANDOM, DRIVER_NAME, tps); + if (status < 0) { + dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n", + tps->irq, status); + i2c_detach_client(&tps->client); + goto fail1; + } +#ifdef CONFIG_ARM + /* annoying race here, ideally we'd have an option + * to claim the irq now and enable it later. + */ + disable_irq(tps->irq); + set_bit(FLAG_IRQ_ENABLE, &tps->flags); +#endif + } else + printk(KERN_WARNING "%s: IRQ not configured!\n", + DRIVER_NAME); + + + switch (tps->model) { + case TPS65010: + case TPS65012: + tps->por = 1; + break; + case TPS_UNKNOWN: + printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME); + break; + /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ + } + tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG); + show_chgconfig(tps->por, "conf/init", tps->chgconf); + + show_chgstatus("chg/init", + i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS)); + show_regstatus("reg/init", + i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS)); + + pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, + i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1), + i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2), + i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1)); + pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, + i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO), + i2c_smbus_read_byte_data(&tps->client, TPS_MASK3)); + + tps65010_driver.attach_adapter = tps65010_noscan; + 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(&tps->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(&tps->client, TPS_MASK2, ~tps->nmask2); + + (void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f + | i2c_smbus_read_byte_data(&tps->client, TPS_MASK3)); + + tps65010_work(tps); + + tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, + tps, DEBUG_FOPS); + return 0; +} + +static int __init tps65010_scan_bus(struct i2c_adapter *bus) +{ + if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA)) + return -EINVAL; + return i2c_probe(bus, &addr_data, tps65010_probe); +} + +static struct i2c_driver tps65010_driver = { + .owner = THIS_MODULE, + .name = "tps65010", + .id = 888, /* FIXME assign "official" value */ + .flags = I2C_DF_NOTIFY, + .attach_adapter = tps65010_scan_bus, + .detach_client = __exit_p(tps65010_detach_client), +}; + +/*-------------------------------------------------------------------------*/ + +/* 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); + } + 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; + + down(&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)); + + up(&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; + } + + down(&the_tps->lock); + + dev_dbg (&the_tps->client.dev, "led%i_on 0x%02x\n", led, + i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs)); + + dev_dbg (&the_tps->client.dev, "led%i_per 0x%02x\n", 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 tps65010_set_led()\n", + DRIVER_NAME); + up(&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); + up(&the_tps->lock); + return status; + } + + dev_dbg (&the_tps->client.dev, "led%i_on 0x%02x\n", 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); + up(&the_tps->lock); + return status; + } + + dev_dbg (&the_tps->client.dev, "led%i_per 0x%02x\n", led, + i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_PER + offs)); + + up(&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; + + down(&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"); + + up(&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; + + down(&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)); + + up(&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; + + down(&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)); + + up(&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; + + down(&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); + up(&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)); + + up(&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); + } + +#if defined(CONFIG_ARM) + if (machine_is_omap_osk()) { + + // FIXME: More should be placed in the initialization code + // of the submodules (DSP, ethernet, power management, + // board-osk.c). Careful: I2C is initialized "late". + + /* Let LED1 (D9) blink */ + tps65010_set_led(LED1, BLINK); + + /* Disable LED 2 (D2) */ + tps65010_set_led(LED2, OFF); + + /* Set GPIO 1 HIGH to disable VBUS power supply; + * OHCI driver powers it up/down as needed. + */ + tps65010_set_gpio_out_value(GPIO1, HIGH); + + /* Set GPIO 2 low to turn on LED D3 */ + tps65010_set_gpio_out_value(GPIO2, HIGH); + + /* Set GPIO 3 low to take ethernet out of reset */ + tps65010_set_gpio_out_value(GPIO3, LOW); + + /* gpio4 for VDD_DSP */ + + /* Enable LOW_PWR */ + tps65010_set_low_pwr(ON); + + /* Switch VLDO2 to 3.0V for AIC23 */ + tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE); + + } else if (machine_is_omap_h2()) { + /* gpio3 for SD, gpio4 for VDD_DSP */ + + /* Enable LOW_PWR */ + tps65010_set_low_pwr(ON); + } else if (machine_is_omap_h3()) { + /* gpio4 for SD, gpio3 for VDD_DSP */ +#ifdef CONFIG_PM + /* Enable LOW_PWR */ + tps65013_set_low_pwr(ON); +#endif + } +#endif + + 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); + |
