--- /dev/null
+/*
+ * 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);
+
projects / linux-2.6 / commitdiff