/*
- * drivers/i2c/chips/menelaus.c
- *
* Copyright (C) 2004 Texas Instruments, Inc.
*
* Some parts based tps65010.c:
#include <linux/sched.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
#include <asm/mach-types.h>
#include <asm/mach/irq.h>
-#include <asm/arch/mux.h>
#include <asm/arch/gpio.h>
#include <asm/arch/menelaus.h>
-#define DEBUG
-
#define DRIVER_NAME "menelaus"
-#define pr_err(fmt, arg...) printk(KERN_ERR DRIVER_NAME ": ", ## arg);
-
#define MENELAUS_I2C_ADDRESS 0x72
#define MENELAUS_REV 0x01
static void menelaus_work(struct work_struct *_menelaus);
-/* Initialized by menelaus_init */
-static unsigned short normal_i2c[] = { MENELAUS_I2C_ADDRESS, I2C_CLIENT_END };
-
-I2C_CLIENT_INSMOD;
-
struct menelaus_chip {
- unsigned long initialized;
struct mutex lock;
- struct i2c_client client;
+ struct i2c_client *client;
struct work_struct work;
- int irq;
+#ifdef CONFIG_RTC_DRV_TWL92330
+ struct rtc_device *rtc;
+ u8 rtc_control;
+ unsigned uie:1;
+#endif
unsigned vcore_hw_mode:1;
- void *handlers[16];
+ u8 mask1, mask2;
+ void (*handlers[16])(struct menelaus_chip *);
void (*mmc_callback)(void *data, u8 mask);
void *mmc_callback_data;
};
-static struct menelaus_chip menelaus;
-static struct menelaus_platform_data *menelaus_pdata;
+static struct menelaus_chip *the_menelaus;
static int menelaus_write_reg(int reg, u8 value)
{
- int val = i2c_smbus_write_byte_data(&menelaus.client, reg, value);
+ int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);
if (val < 0) {
- pr_err("write error");
+ dev_err(&the_menelaus->client->dev, "write error");
return val;
}
static int menelaus_read_reg(int reg)
{
- int val = i2c_smbus_read_byte_data(&menelaus.client, reg);
+ int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);
if (val < 0)
- pr_err("read error");
+ dev_err(&the_menelaus->client->dev, "read error");
return val;
}
static int menelaus_enable_irq(int irq)
{
- if (irq > 7)
+ if (irq > 7) {
+ irq -= 8;
+ the_menelaus->mask2 &= ~(1 << irq);
return menelaus_write_reg(MENELAUS_INT_MASK2,
- menelaus_read_reg(MENELAUS_INT_MASK2)
- & ~(1 << (irq - 8)));
- else
+ the_menelaus->mask2);
+ } else {
+ the_menelaus->mask1 &= ~(1 << irq);
return menelaus_write_reg(MENELAUS_INT_MASK1,
- menelaus_read_reg(MENELAUS_INT_MASK1)
- & ~(1 << irq));
+ the_menelaus->mask1);
+ }
}
static int menelaus_disable_irq(int irq)
{
- if (irq > 7)
- return menelaus_write_reg(menelaus_read_reg(MENELAUS_INT_MASK2)
- | (1 << (irq - 8)),
- MENELAUS_INT_MASK2);
- else
+ if (irq > 7) {
+ irq -= 8;
+ the_menelaus->mask2 |= (1 << irq);
+ return menelaus_write_reg(MENELAUS_INT_MASK2,
+ the_menelaus->mask2);
+ } else {
+ the_menelaus->mask1 |= (1 << irq);
return menelaus_write_reg(MENELAUS_INT_MASK1,
- menelaus_read_reg(MENELAUS_INT_MASK1)
- | (1 << irq));
+ the_menelaus->mask1);
+ }
}
static int menelaus_ack_irq(int irq)
if (irq > 7)
return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));
else
- return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
+ return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);
}
/* Adds a handler for an interrupt. Does not run in interrupt context */
-static int menelaus_add_irq_work(int irq, void * handler)
+static int menelaus_add_irq_work(int irq,
+ void (*handler)(struct menelaus_chip *))
{
int ret = 0;
- mutex_lock(&menelaus.lock);
- menelaus.handlers[irq] = handler;
+ mutex_lock(&the_menelaus->lock);
+ the_menelaus->handlers[irq] = handler;
ret = menelaus_enable_irq(irq);
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
{
int ret = 0;
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
ret = menelaus_disable_irq(irq);
- menelaus.handlers[irq] = NULL;
- mutex_unlock(&menelaus.lock);
+ the_menelaus->handlers[irq] = NULL;
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
* in each slot. In this case the cards are not seen by menelaus.
* FIXME: Add handling for D1 too
*/
-static int menelaus_mmc_cd_work(struct menelaus_chip * menelaus_hw)
+static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)
{
int reg;
unsigned char card_mask = 0;
reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);
if (reg < 0)
- return reg;
+ return;
if (!(reg & 0x1))
card_mask |= (1 << 0);
if (menelaus_hw->mmc_callback)
menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,
card_mask);
-
- return 0;
}
/*
if (slot != 1 && slot != 2)
return -EINVAL;
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);
if (ret < 0) {
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
val = ret;
val &= ~(1 << 3);
}
ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
{
int ret;
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
if (ret < 0)
goto out;
ret &= ~(1 << 5);
ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
out:
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
EXPORT_SYMBOL(menelaus_set_slot_sel);
if (power >= 3)
return -EINVAL;
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);
if (ret < 0)
val &= ~(0x03 << 2);
ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);
out:
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
EXPORT_SYMBOL(menelaus_set_mmc_slot);
-#include <linux/delay.h>
-
int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),
void *data)
{
int ret = 0;
- menelaus.mmc_callback_data = data;
- menelaus.mmc_callback = callback;
+ the_menelaus->mmc_callback_data = data;
+ the_menelaus->mmc_callback = callback;
ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,
menelaus_mmc_cd_work);
if (ret < 0)
menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);
menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);
- menelaus.mmc_callback = NULL;
- menelaus.mmc_callback_data = 0;
+ the_menelaus->mmc_callback = NULL;
+ the_menelaus->mmc_callback_data = 0;
}
EXPORT_SYMBOL(menelaus_unregister_mmc_callback);
int vtg_val, int mode)
{
int val, ret;
+ struct i2c_client *c = the_menelaus->client;
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
if (vtg == 0)
goto set_voltage;
goto out;
val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);
val |= vtg_val << vtg->vtg_shift;
-#ifdef DEBUG
- printk("menelaus: Setting voltage '%s' to %d mV (reg 0x%02x, val 0x%02x)\n",
- vtg->name, mV, vtg->vtg_reg, val);
-#endif
+
+ dev_dbg(&c->dev, "Setting voltage '%s'"
+ "to %d mV (reg 0x%02x, val 0x%02x)\n",
+ vtg->name, mV, vtg->vtg_reg, val);
+
ret = menelaus_write_reg(vtg->vtg_reg, val);
if (ret < 0)
goto out;
set_voltage:
ret = menelaus_write_reg(vtg->mode_reg, mode);
out:
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
if (ret == 0) {
/* Wait for voltage to stabilize */
msleep(1);
return -EINVAL;
}
-/* Vcore can be programmed in two ways:
+/*
+ * Vcore can be programmed in two ways:
* SW-controlled: Required voltage is programmed into VCORE_CTRL1
* HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3
* and VCORE_CTRL4
-
+ *
* Call correct 'set' function accordingly
*/
int menelaus_set_vcore_sw(unsigned int mV)
{
int val, ret;
+ struct i2c_client *c = the_menelaus->client;
- val = menelaus_get_vtg_value(mV, vcore_values, ARRAY_SIZE(vcore_values));
+ val = menelaus_get_vtg_value(mV, vcore_values,
+ ARRAY_SIZE(vcore_values));
if (val < 0)
return -EINVAL;
-#ifdef DEBUG
- printk("menelaus: Setting VCORE to %d mV (val 0x%02x)\n", mV, val);
-#endif
+
+ dev_dbg(&c->dev, "Setting VCORE to %d mV (val 0x%02x)\n", mV, val);
/* Set SW mode and the voltage in one go. */
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
if (ret == 0)
- menelaus.vcore_hw_mode = 0;
- mutex_unlock(&menelaus.lock);
+ the_menelaus->vcore_hw_mode = 0;
+ mutex_unlock(&the_menelaus->lock);
msleep(1);
return ret;
int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)
{
int fval, rval, val, ret;
+ struct i2c_client *c = the_menelaus->client;
- rval = menelaus_get_vtg_value(roof_mV, vcore_values, ARRAY_SIZE(vcore_values));
+ rval = menelaus_get_vtg_value(roof_mV, vcore_values,
+ ARRAY_SIZE(vcore_values));
if (rval < 0)
return -EINVAL;
- fval = menelaus_get_vtg_value(floor_mV, vcore_values, ARRAY_SIZE(vcore_values));
+ fval = menelaus_get_vtg_value(floor_mV, vcore_values,
+ ARRAY_SIZE(vcore_values));
if (fval < 0)
return -EINVAL;
-#ifdef DEBUG
- printk("menelaus: Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
+ dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",
floor_mV, roof_mV);
-#endif
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);
if (ret < 0)
goto out;
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);
if (ret < 0)
goto out;
- if (!menelaus.vcore_hw_mode) {
+ if (!the_menelaus->vcore_hw_mode) {
val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
- val |= ((1 << 7) | (1 << 5)); /* HW mode, turn OFF byte comparator */
+ /* HW mode, turn OFF byte comparator */
+ val |= ((1 << 7) | (1 << 5));
ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);
- menelaus.vcore_hw_mode = 1;
+ the_menelaus->vcore_hw_mode = 1;
}
msleep(1);
out:
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
if (mV == 0)
return menelaus_set_voltage(vtg, 0, 0, 0);
- val = menelaus_get_vtg_value(mV, vdcdc_values, ARRAY_SIZE(vdcdc_values));
+ val = menelaus_get_vtg_value(mV, vdcdc_values,
+ ARRAY_SIZE(vdcdc_values));
if (val < 0)
return -EINVAL;
return menelaus_set_voltage(vtg, mV, val, 0x03);
int menelaus_set_regulator_sleep(int enable, u32 val)
{
int t, ret;
+ struct i2c_client *c = the_menelaus->client;
- mutex_lock(&menelaus.lock);
+ mutex_lock(&the_menelaus->lock);
ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);
if (ret < 0)
goto out;
-#ifdef DEBUG
- printk("menelaus: regulator sleep configuration: %02x\n", val);
-#endif
+
+ dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);
+
ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);
if (ret < 0)
goto out;
ret &= ~t;
ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);
out:
- mutex_unlock(&menelaus.lock);
+ mutex_unlock(&the_menelaus->lock);
return ret;
}
{
struct menelaus_chip *menelaus =
container_of(_menelaus, struct menelaus_chip, work);
- int (*handler)(struct menelaus_chip *menelaus);
+ void (*handler)(struct menelaus_chip *menelaus);
while (1) {
- int i;
- unsigned char isr;
-
- isr = menelaus_read_reg(MENELAUS_INT_STATUS1) |
- (menelaus_read_reg(MENELAUS_INT_STATUS2) << 8);
+ unsigned isr;
+ isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
+ & ~menelaus->mask2) << 8;
+ isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
+ & ~menelaus->mask1;
if (!isr)
break;
- for (i = 0; i < IH_MENELAUS_IRQS; i++) {
- if (isr & (1 << i)) {
- mutex_lock(&menelaus->lock);
- menelaus_disable_irq(i);
- menelaus_ack_irq(i);
- if (menelaus->handlers[i]) {
- handler = menelaus->handlers[i];
- handler(menelaus);
- }
- menelaus_enable_irq(i);
- mutex_unlock(&menelaus->lock);
- }
+ while (isr) {
+ int irq = fls(isr) - 1;
+ isr &= ~(1 << irq);
+
+ mutex_lock(&menelaus->lock);
+ menelaus_disable_irq(irq);
+ menelaus_ack_irq(irq);
+ handler = menelaus->handlers[irq];
+ if (handler)
+ handler(menelaus);
+ menelaus_enable_irq(irq);
+ mutex_unlock(&menelaus->lock);
}
}
- enable_irq(menelaus->irq);
+ enable_irq(menelaus->client->irq);
}
/*
return IRQ_HANDLED;
}
+/*-----------------------------------------------------------------------*/
+
+/*
+ * The RTC needs to be set once, then it runs on backup battery power.
+ * It supports alarms, including system wake alarms (from some modes);
+ * and 1/second IRQs if requested.
+ */
+#ifdef CONFIG_RTC_DRV_TWL92330
+
+#define RTC_CTRL_RTC_EN (1 << 0)
+#define RTC_CTRL_AL_EN (1 << 1)
+#define RTC_CTRL_MODE12 (1 << 2)
+#define RTC_CTRL_EVERY_MASK (3 << 3)
+#define RTC_CTRL_EVERY_SEC (0 << 3)
+#define RTC_CTRL_EVERY_MIN (1 << 3)
+#define RTC_CTRL_EVERY_HR (2 << 3)
+#define RTC_CTRL_EVERY_DAY (3 << 3)
+
+#define RTC_UPDATE_EVERY 0x08
+
+#define RTC_HR_PM (1 << 7)
+
+static void menelaus_to_time(char *regs, struct rtc_time *t)
+{
+ t->tm_sec = BCD2BIN(regs[0]);
+ t->tm_min = BCD2BIN(regs[1]);
+ if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
+ t->tm_hour = BCD2BIN(regs[2] & 0x1f) - 1;
+ if (regs[2] & RTC_HR_PM)
+ t->tm_hour += 12;
+ } else
+ t->tm_hour = BCD2BIN(regs[2] & 0x3f);
+ t->tm_mday = BCD2BIN(regs[3]);
+ t->tm_mon = BCD2BIN(regs[4]) - 1;
+ t->tm_year = BCD2BIN(regs[5]) + 100;
+}
+
+static int time_to_menelaus(struct rtc_time *t, int regnum)
+{
+ int hour, status;
+
+ status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_sec));
+ if (status < 0)
+ goto fail;
+
+ status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_min));
+ if (status < 0)
+ goto fail;
+
+ if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {
+ hour = t->tm_hour + 1;
+ if (hour > 12)
+ hour = RTC_HR_PM | BIN2BCD(hour - 12);
+ else
+ hour = BIN2BCD(hour);
+ } else
+ hour = BIN2BCD(t->tm_hour);
+ status = menelaus_write_reg(regnum++, hour);
+ if (status < 0)
+ goto fail;
+
+ status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mday));
+ if (status < 0)
+ goto fail;
+
+ status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_mon + 1));
+ if (status < 0)
+ goto fail;
+
+ status = menelaus_write_reg(regnum++, BIN2BCD(t->tm_year - 100));
+ if (status < 0)
+ goto fail;
+
+ return 0;
+fail:
+ dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",
+ --regnum, status);
+ return status;
+}
+
+static int menelaus_read_time(struct device *dev, struct rtc_time *t)
+{
+ struct i2c_msg msg[2];
+ char regs[7];
+ int status;
+
+ /* block read date and time registers */
+ regs[0] = MENELAUS_RTC_SEC;
+
+ msg[0].addr = MENELAUS_I2C_ADDRESS;
+ msg[0].flags = 0;
+ msg[0].len = 1;
+ msg[0].buf = regs;
+
+ msg[1].addr = MENELAUS_I2C_ADDRESS;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = sizeof(regs);
+ msg[1].buf = regs;
+
+ status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
+ if (status != 2) {
+ dev_err(dev, "%s error %d\n", "read", status);
+ return -EIO;
+ }
+
+ menelaus_to_time(regs, t);
+ t->tm_wday = BCD2BIN(regs[6]);
+
+ return 0;
+}
+
+static int menelaus_set_time(struct device *dev, struct rtc_time *t)
+{
+ int status;
+
+ /* write date and time registers */
+ status = time_to_menelaus(t, MENELAUS_RTC_SEC);
+ if (status < 0)
+ return status;
+ status = menelaus_write_reg(MENELAUS_RTC_WKDAY, BIN2BCD(t->tm_wday));
+ if (status < 0) {
+ dev_err(&the_menelaus->client->dev, "rtc write reg %02x"
+ "err %d\n", MENELAUS_RTC_WKDAY, status);
+ return status;
+ }
+
+ /* now commit the write */
+ status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);
+ if (status < 0)
+ dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",
+ status);
+
+ return 0;
+}
+
+static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)
+{
+ struct i2c_msg msg[2];
+ char regs[6];
+ int status;
+
+ /* block read alarm registers */
+ regs[0] = MENELAUS_RTC_AL_SEC;
+
+ msg[0].addr = MENELAUS_I2C_ADDRESS;
+ msg[0].flags = 0;
+ msg[0].len = 1;
+ msg[0].buf = regs;
+
+ msg[1].addr = MENELAUS_I2C_ADDRESS;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = sizeof(regs);
+ msg[1].buf = regs;
+
+ status = i2c_transfer(the_menelaus->client->adapter, msg, 2);
+ if (status != 2) {
+ dev_err(dev, "%s error %d\n", "alarm read", status);
+ return -EIO;
+ }
+
+ menelaus_to_time(regs, &w->time);
+
+ w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);
+
+ /* NOTE we *could* check if actually pending... */
+ w->pending = 0;
+
+ return 0;
+}
+
+static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)
+{
+ int status;
+
+ if (the_menelaus->client->irq <= 0 && w->enabled)
+ return -ENODEV;
+
+ /* clear previous alarm enable */
+ if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {
+ the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
+ status = menelaus_write_reg(MENELAUS_RTC_CTRL,
+ the_menelaus->rtc_control);
+ if (status < 0)
+ return status;
+ }
+
+ /* write alarm registers */
+ status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);
+ if (status < 0)
+ return status;
+
+ /* enable alarm if requested */
+ if (w->enabled) {
+ the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
+ status = menelaus_write_reg(MENELAUS_RTC_CTRL,
+ the_menelaus->rtc_control);
+ }
+
+ return status;
+}
+
+#ifdef CONFIG_RTC_INTF_DEV
+
+static void menelaus_rtc_update_work(struct menelaus_chip *m)
+{
+ /* report 1/sec update */
+ local_irq_disable();
+ rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);
+ local_irq_enable();
+}
+
+static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)
+{
+ int status;
+
+ if (the_menelaus->client->irq <= 0)
+ return -ENOIOCTLCMD;
+
+ switch (cmd) {
+ /* alarm IRQ */
+ case RTC_AIE_ON:
+ if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)
+ return 0;
+ the_menelaus->rtc_control |= RTC_CTRL_AL_EN;
+ break;
+ case RTC_AIE_OFF:
+ if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))
+ return 0;
+ the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
+ break;
+ /* 1/second "update" IRQ */
+ case RTC_UIE_ON:
+ if (the_menelaus->uie)
+ return 0;
+ status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
+ status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,
+ menelaus_rtc_update_work);
+ if (status == 0)
+ the_menelaus->uie = 1;
+ return status;
+ case RTC_UIE_OFF:
+ if (!the_menelaus->uie)
+ return 0;
+ status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);
+ if (status == 0)
+ the_menelaus->uie = 0;
+ return status;
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
+}
+
+#else
+#define menelaus_ioctl NULL
+#endif
+
+/* REVISIT no compensation register support ... */
+
+static const struct rtc_class_ops menelaus_rtc_ops = {
+ .ioctl = menelaus_ioctl,
+ .read_time = menelaus_read_time,
+ .set_time = menelaus_set_time,
+ .read_alarm = menelaus_read_alarm,
+ .set_alarm = menelaus_set_alarm,
+};
+
+static void menelaus_rtc_alarm_work(struct menelaus_chip *m)
+{
+ /* report alarm */
+ local_irq_disable();
+ rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);
+ local_irq_enable();
+
+ /* then disable it; alarms are oneshot */
+ the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;
+ menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);
+}
+
+static inline void menelaus_rtc_init(struct menelaus_chip *m)
+{
+ int alarm = (m->client->irq > 0);
+
+ /* assume 32KDETEN pin is pulled high */
+ if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {
+ dev_dbg(&m->client->dev, "no 32k oscillator\n");
+ return;
+ }
+
+ /* support RTC alarm; it can issue wakeups */
+ if (alarm) {
+ if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,
+ menelaus_rtc_alarm_work) < 0) {
+ dev_err(&m->client->dev, "can't handle RTC alarm\n");
+ return;
+ }
+ device_init_wakeup(&m->client->dev, 1);
+ }
+
+ /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */
+ m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);
+ if (!(m->rtc_control & RTC_CTRL_RTC_EN)
+ || (m->rtc_control & RTC_CTRL_AL_EN)
+ || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {
+ if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {
+ dev_warn(&m->client->dev, "rtc clock needs setting\n");
+ m->rtc_control |= RTC_CTRL_RTC_EN;
+ }
+ m->rtc_control &= ~RTC_CTRL_EVERY_MASK;
+ m->rtc_control &= ~RTC_CTRL_AL_EN;
+ menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);
+ }
+
+ m->rtc = rtc_device_register(DRIVER_NAME,
+ &m->client->dev,
+ &menelaus_rtc_ops, THIS_MODULE);
+ if (IS_ERR(m->rtc)) {
+ if (alarm) {
+ menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);
+ device_init_wakeup(&m->client->dev, 0);
+ }
+ dev_err(&m->client->dev, "can't register RTC: %d\n",
+ (int) PTR_ERR(m->rtc));
+ the_menelaus->rtc = NULL;
+ }
+}
+
+#else
+
+static inline void menelaus_rtc_init(struct menelaus_chip *m)
+{
+ /* nothing */
+}
+
+#endif
+
+/*-----------------------------------------------------------------------*/
+
static struct i2c_driver menelaus_i2c_driver;
-static int menelaus_probe(struct i2c_adapter *adapter, int address, int kind)
+static int menelaus_probe(struct i2c_client *client)
{
- struct i2c_client *c;
+ struct menelaus_chip *menelaus;
int rev = 0, val;
int err = 0;
+ struct menelaus_platform_data *menelaus_pdata =
+ client->dev.platform_data;
- if (test_and_set_bit(0, &menelaus.initialized))
- return -EBUSY;
+ if (the_menelaus) {
+ dev_dbg(&client->dev, "only one %s for now\n",
+ DRIVER_NAME);
+ return -ENODEV;
+ }
- c = &menelaus.client;
- strncpy(c->name, DRIVER_NAME, sizeof(c->name));
- c->addr = address;
- c->adapter = adapter;
- c->driver = &menelaus_i2c_driver;
- c->flags = 0;
+ menelaus = kzalloc(sizeof *menelaus, GFP_KERNEL);
+ if (!menelaus)
+ return -ENOMEM;
- if ((err = i2c_attach_client(c)) < 0) {
- pr_err("couldn't attach\n");
- goto fail1;
- }
+ i2c_set_clientdata(client, menelaus);
+
+ the_menelaus = menelaus;
+ menelaus->client = client;
/* If a true probe check the device */
- if (kind < 0 && (rev = menelaus_read_reg(MENELAUS_REV)) < 0) {
- pr_err("device not found");
+ rev = menelaus_read_reg(MENELAUS_REV);
+ if (rev < 0) {
+ dev_err(&client->dev, "device not found");
err = -ENODEV;
- goto fail2;
+ goto fail1;
}
- /* Most likely Menelaus interrupt is at SYS_NIRQ */
- omap_cfg_reg(W19_24XX_SYS_NIRQ);
- menelaus.irq = INT_24XX_SYS_NIRQ;
-
/* Ack and disable all Menelaus interrupts */
menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);
menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);
menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);
menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);
+ menelaus->mask1 = 0xff;
+ menelaus->mask2 = 0xff;
/* Set output buffer strengths */
menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);
- err = request_irq(menelaus.irq, menelaus_irq, IRQF_DISABLED,
- DRIVER_NAME, &menelaus);
- if (err) {
- printk(KERN_ERR "Could not get Menelaus IRQ\n");
- goto fail2;
+ if (client->irq > 0) {
+ err = request_irq(client->irq, menelaus_irq, IRQF_DISABLED,
+ DRIVER_NAME, menelaus);
+ if (err) {
+ dev_dbg(&client->dev, "can't get IRQ %d, err %d",
+ client->irq, err);
+ goto fail1;
+ }
}
- mutex_init(&menelaus.lock);
- INIT_WORK(&menelaus.work, menelaus_work);
+ mutex_init(&menelaus->lock);
+ INIT_WORK(&menelaus->work, menelaus_work);
- if (kind < 0)
- pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
+ dev_info(&client->dev, "Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);
val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);
if (val < 0)
- goto fail3;
+ goto fail2;
if (val & (1 << 7))
- menelaus.vcore_hw_mode = 1;
+ menelaus->vcore_hw_mode = 1;
else
- menelaus.vcore_hw_mode = 0;
+ menelaus->vcore_hw_mode = 0;
if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {
- err = menelaus_pdata->late_init(&c->dev);
+ err = menelaus_pdata->late_init(&client->dev);
if (err < 0)
- goto fail3;
+ goto fail2;
}
+ menelaus_rtc_init(menelaus);
+
return 0;
-fail3:
- free_irq(menelaus.irq, &menelaus);
- flush_scheduled_work();
fail2:
- i2c_detach_client(c);
+ free_irq(client->irq, menelaus);
+ flush_scheduled_work();
fail1:
- clear_bit(0, &menelaus.initialized);
+ kfree(menelaus);
return err;
}
-static int menelaus_remove(struct i2c_client *client)
+static int __exit menelaus_remove(struct i2c_client *client)
{
- int err;
-
- free_irq(menelaus.irq, &menelaus);
-
- if ((err = i2c_detach_client(client))) {
- pr_err("client deregistration failed\n");
- return err;
- }
-
- clear_bit(0, &menelaus.initialized);
+ struct menelaus_chip *menelaus = i2c_get_clientdata(client);
+ free_irq(client->irq, menelaus);
+ kfree(menelaus);
+ i2c_set_clientdata(client, NULL);
+ the_menelaus = NULL;
return 0;
}
-/*-----------------------------------------------------------------------*/
-
-static int menelaus_scan_bus(struct i2c_adapter *bus)
-{
- if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA |
- I2C_FUNC_SMBUS_WRITE_BYTE)) {
- pr_err("invalid i2c bus functionality\n");
- return -EINVAL;
- }
-
- return i2c_probe(bus, &addr_data, menelaus_probe);
-}
-
static struct i2c_driver menelaus_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
},
- .id = I2C_DRIVERID_MISC, /*FIXME:accroding to i2c-ids.h */
- .class = I2C_CLASS_HWMON,
- .attach_adapter = menelaus_scan_bus,
- .detach_client = menelaus_remove,
+ .probe = menelaus_probe,
+ .remove = __exit_p(menelaus_remove),
};
static int __init menelaus_init(void)
{
int res;
- if ((res = i2c_add_driver(&menelaus_i2c_driver)) < 0) {
- pr_err("driver registration failed\n");
+ res = i2c_add_driver(&menelaus_i2c_driver);
+ if (res < 0) {
+ dev_err(&the_menelaus->client->dev, "driver registration failed\n");
return res;
}
static void __exit menelaus_exit(void)
{
- if (i2c_del_driver(&menelaus_i2c_driver) < 0)
- pr_err("driver remove failed\n");
+ i2c_del_driver(&menelaus_i2c_driver);
/* FIXME: Shutdown menelaus parts that can be shut down */
}
-void __init menelaus_set_platform_data(struct menelaus_platform_data *pdata)
-{
- menelaus_pdata = pdata;
-}
-
-MODULE_AUTHOR("Texas Instruments, Inc.");
+MODULE_AUTHOR("Texas Instruments, Inc. (and others)");
MODULE_DESCRIPTION("I2C interface for Menelaus.");
MODULE_LICENSE("GPL");
projects / linux-2.6-omap-h63xx.git / blobdiff