static int rs5c_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct i2c_client *client = to_i2c_client(dev);
struct rs5c372 *rs5c = i2c_get_clientdata(client);
unsigned char buf;
int status, addr;
buf = rs5c->regs[RS5C_REG_CTRL1];
if (!rs5c->has_irq)
return -EINVAL;
status = rs5c_get_regs(rs5c);
if (status < 0)
return status;
addr = RS5C_ADDR(RS5C_REG_CTRL1);
if (enabled)
buf |= RS5C_CTRL1_AALE;
else
buf &= ~RS5C_CTRL1_AALE;
if (i2c_smbus_write_byte_data(client, addr, buf) < 0) {
printk(KERN_WARNING "%s: can't update alarm\n",
rs5c->rtc->name);
status = -EIO;
} else
rs5c->regs[RS5C_REG_CTRL1] = buf;
return status;
}
static int rs5c_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct i2c_client *client = to_i2c_client(dev);
struct rs5c372 *rs5c = i2c_get_clientdata(client);
int status;
status = rs5c_get_regs(rs5c);
if (status < 0)
return status;
/* report alarm time */
t->time.tm_sec = 0;
t->time.tm_min = bcd2bin(rs5c->regs[RS5C_REG_ALARM_A_MIN] & 0x7f);
t->time.tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C_REG_ALARM_A_HOURS]);
t->time.tm_mday = -1;
t->time.tm_mon = -1;
t->time.tm_year = -1;
t->time.tm_wday = -1;
t->time.tm_yday = -1;
t->time.tm_isdst = -1;
/* ... and status */
t->enabled = !!(rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE);
t->pending = !!(rs5c->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_AAFG);
return 0;
}
static int rs5c372_get_datetime(struct i2c_client *client, struct rtc_time *tm)
{
struct rs5c372 *rs5c = i2c_get_clientdata(client);
int status = rs5c_get_regs(rs5c);
if (status < 0)
return status;
tm->tm_sec = bcd2bin(rs5c->regs[RS5C372_REG_SECS] & 0x7f);
tm->tm_min = bcd2bin(rs5c->regs[RS5C372_REG_MINS] & 0x7f);
tm->tm_hour = rs5c_reg2hr(rs5c, rs5c->regs[RS5C372_REG_HOURS]);
tm->tm_wday = bcd2bin(rs5c->regs[RS5C372_REG_WDAY] & 0x07);
tm->tm_mday = bcd2bin(rs5c->regs[RS5C372_REG_DAY] & 0x3f);
/* tm->tm_mon is zero-based */
tm->tm_mon = bcd2bin(rs5c->regs[RS5C372_REG_MONTH] & 0x1f) - 1;
/* year is 1900 + tm->tm_year */
tm->tm_year = bcd2bin(rs5c->regs[RS5C372_REG_YEAR]) + 100;
dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
"mday=%d, mon=%d, year=%d, wday=%d\n",
__func__,
tm->tm_sec, tm->tm_min, tm->tm_hour,
tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
/* rtc might need initialization */
return rtc_valid_tm(tm);
}
static int
rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
struct i2c_client *client = to_i2c_client(dev);
struct rs5c372 *rs5c = i2c_get_clientdata(client);
unsigned char buf;
int status, addr;
buf = rs5c->regs[RS5C_REG_CTRL1];
switch (cmd) {
case RTC_UIE_OFF:
case RTC_UIE_ON:
/* some 327a modes use a different IRQ pin for 1Hz irqs */
if (rs5c->type == rtc_rs5c372a
&& (buf & RS5C372A_CTRL1_SL1))
return -ENOIOCTLCMD;
case RTC_AIE_OFF:
case RTC_AIE_ON:
/* these irq management calls only make sense for chips
* which are wired up to an IRQ.
*/
if (!rs5c->has_irq)
return -ENOIOCTLCMD;
break;
default:
return -ENOIOCTLCMD;
}
status = rs5c_get_regs(rs5c);
if (status < 0)
return status;
addr = RS5C_ADDR(RS5C_REG_CTRL1);
switch (cmd) {
case RTC_AIE_OFF: /* alarm off */
buf &= ~RS5C_CTRL1_AALE;
break;
case RTC_AIE_ON: /* alarm on */
buf |= RS5C_CTRL1_AALE;
break;
case RTC_UIE_OFF: /* update off */
buf &= ~RS5C_CTRL1_CT_MASK;
break;
case RTC_UIE_ON: /* update on */
buf &= ~RS5C_CTRL1_CT_MASK;
buf |= RS5C_CTRL1_CT4;
break;
}
if (i2c_smbus_write_byte_data(client, addr, buf) < 0) {
printk(KERN_WARNING "%s: can't update alarm\n",
rs5c->rtc->name);
status = -EIO;
} else
rs5c->regs[RS5C_REG_CTRL1] = buf;
return status;
}
static int
rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
struct i2c_client *client = to_i2c_client(dev);
struct rs5c372 *rs5c = i2c_get_clientdata(client);
unsigned char buf;
int status, addr;
buf = rs5c->regs[RS5C_REG_CTRL1];
switch (cmd) {
case RTC_UIE_OFF:
case RTC_UIE_ON:
if (rs5c->type == rtc_rs5c372a
&& (buf & RS5C372A_CTRL1_SL1))
return -ENOIOCTLCMD;
case RTC_AIE_OFF:
case RTC_AIE_ON:
if (!rs5c->has_irq)
return -ENOIOCTLCMD;
break;
default:
return -ENOIOCTLCMD;
}
status = rs5c_get_regs(rs5c);
if (status < 0)
return status;
addr = RS5C_ADDR(RS5C_REG_CTRL1);
switch (cmd) {
case RTC_AIE_OFF:
buf &= ~RS5C_CTRL1_AALE;
break;
case RTC_AIE_ON:
buf |= RS5C_CTRL1_AALE;
break;
case RTC_UIE_OFF:
buf &= ~RS5C_CTRL1_CT_MASK;
break;
case RTC_UIE_ON:
buf &= ~RS5C_CTRL1_CT_MASK;
buf |= RS5C_CTRL1_CT4;
break;
}
if (i2c_smbus_write_byte_data(client, addr, buf) < 0) {
printk(KERN_WARNING "%s: can't update alarm\n",
rs5c->rtc->name);
status = -EIO;
} else
rs5c->regs[RS5C_REG_CTRL1] = buf;
return status;
}
static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct i2c_client *client = to_i2c_client(dev);
struct rs5c372 *rs5c = i2c_get_clientdata(client);
int status, addr, i;
unsigned char buf[3];
/* only handle up to 24 hours in the future, like RTC_ALM_SET */
if (t->time.tm_mday != -1
|| t->time.tm_mon != -1
|| t->time.tm_year != -1)
return -EINVAL;
/* REVISIT: round up tm_sec */
/* if needed, disable irq (clears pending status) */
status = rs5c_get_regs(rs5c);
if (status < 0)
return status;
if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) {
addr = RS5C_ADDR(RS5C_REG_CTRL1);
buf[0] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE;
if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) {
pr_debug("%s: can't disable alarm\n", rs5c->rtc->name);
return -EIO;
}
rs5c->regs[RS5C_REG_CTRL1] = buf[0];
}
/* set alarm */
buf[0] = bin2bcd(t->time.tm_min);
buf[1] = rs5c_hr2reg(rs5c, t->time.tm_hour);
buf[2] = 0x7f; /* any/all days */
for (i = 0; i < sizeof(buf); i++) {
addr = RS5C_ADDR(RS5C_REG_ALARM_A_MIN + i);
if (i2c_smbus_write_byte_data(client, addr, buf[i]) < 0) {
pr_debug("%s: can't set alarm time\n", rs5c->rtc->name);
return -EIO;
}
}
/* ... and maybe enable its irq */
if (t->enabled) {
addr = RS5C_ADDR(RS5C_REG_CTRL1);
buf[0] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE;
if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0)
printk(KERN_WARNING "%s: can't enable alarm\n",
rs5c->rtc->name);
rs5c->regs[RS5C_REG_CTRL1] = buf[0];
}
return 0;
}
static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct i2c_client *client = to_i2c_client(dev);
struct rs5c372 *rs5c = i2c_get_clientdata(client);
int status, addr, i;
unsigned char buf[3];
if (t->time.tm_mday != -1
|| t->time.tm_mon != -1
|| t->time.tm_year != -1)
return -EINVAL;
status = rs5c_get_regs(rs5c);
if (status < 0)
return status;
if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) {
addr = RS5C_ADDR(RS5C_REG_CTRL1);
buf[0] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE;
if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) {
pr_debug("%s: can't disable alarm\n", rs5c->rtc->name);
return -EIO;
}
rs5c->regs[RS5C_REG_CTRL1] = buf[0];
}
buf[0] = bin2bcd(t->time.tm_min);
buf[1] = rs5c_hr2reg(rs5c, t->time.tm_hour);
buf[2] = 0x7f;
for (i = 0; i < sizeof(buf); i++) {
addr = RS5C_ADDR(RS5C_REG_ALARM_A_MIN + i);
if (i2c_smbus_write_byte_data(client, addr, buf[i]) < 0) {
pr_debug("%s: can't set alarm time\n", rs5c->rtc->name);
return -EIO;
}
}
if (t->enabled) {
addr = RS5C_ADDR(RS5C_REG_CTRL1);
buf[0] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE;
if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0)
printk(KERN_WARNING "%s: can't enable alarm\n",
rs5c->rtc->name);
rs5c->regs[RS5C_REG_CTRL1] = buf[0];
}
return 0;
}
static int rs5c372_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int err = 0;
int smbus_mode = 0;
struct rs5c372 *rs5c372;
struct rtc_time tm;
dev_dbg(&client->dev, "%s\n", __func__);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) {
/*
* If we don't have any master mode adapter, try breaking
* it down in to the barest of capabilities.
*/
if (i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK))
smbus_mode = 1;
else {
/* Still no good, give up */
err = -ENODEV;
goto exit;
}
}
if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
rs5c372->client = client;
i2c_set_clientdata(client, rs5c372);
rs5c372->type = id->driver_data;
/* we read registers 0x0f then 0x00-0x0f; skip the first one */
rs5c372->regs = &rs5c372->buf[1];
rs5c372->smbus = smbus_mode;
err = rs5c_get_regs(rs5c372);
if (err < 0)
goto exit_kfree;
/* clock may be set for am/pm or 24 hr time */
switch (rs5c372->type) {
case rtc_rs5c372a:
case rtc_rs5c372b:
/* alarm uses ALARM_A; and nINTRA on 372a, nINTR on 372b.
* so does periodic irq, except some 327a modes.
*/
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24)
rs5c372->time24 = 1;
break;
case rtc_r2025sd:
case rtc_rv5c386:
case rtc_rv5c387a:
if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24)
rs5c372->time24 = 1;
/* alarm uses ALARM_W; and nINTRB for alarm and periodic
* irq, on both 386 and 387
*/
break;
default:
dev_err(&client->dev, "unknown RTC type\n");
goto exit_kfree;
}
/* if the oscillator lost power and no other software (like
* the bootloader) set it up, do it here.
*
* The R2025S/D does this a little differently than the other
* parts, so we special case that..
*/
err = rs5c_oscillator_setup(rs5c372);
if (unlikely(err < 0)) {
dev_err(&client->dev, "setup error\n");
goto exit_kfree;
}
if (rs5c372_get_datetime(client, &tm) < 0)
dev_warn(&client->dev, "clock needs to be set\n");
dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n",
({ char *s; switch (rs5c372->type) {
case rtc_r2025sd: s = "r2025sd"; break;
case rtc_rs5c372a: s = "rs5c372a"; break;
case rtc_rs5c372b: s = "rs5c372b"; break;
case rtc_rv5c386: s = "rv5c386"; break;
case rtc_rv5c387a: s = "rv5c387a"; break;
default: s = "chip"; break;
}; s;}),
static int rs5c372_probe(struct i2c_adapter *adapter, int address, int kind)
{
int err = 0;
struct i2c_client *client;
struct rs5c372 *rs5c372;
struct rtc_time tm;
dev_dbg(adapter->class_dev.dev, "%s\n", __FUNCTION__);
if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
err = -ENODEV;
goto exit;
}
if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
/* we read registers 0x0f then 0x00-0x0f; skip the first one */
rs5c372->regs=&rs5c372->buf[1];
/* On conversion to a "new style" i2c driver, we'll be handed
* the i2c_client (we won't create it)
*/
client = &rs5c372->dev;
rs5c372->client = client;
/* I2C client */
client->addr = address;
client->driver = &rs5c372_driver;
client->adapter = adapter;
strlcpy(client->name, rs5c372_driver.driver.name, I2C_NAME_SIZE);
i2c_set_clientdata(client, rs5c372);
/* Inform the i2c layer */
if ((err = i2c_attach_client(client)))
goto exit_kfree;
err = rs5c_get_regs(rs5c372);
if (err < 0)
goto exit_detach;
/* For "new style" drivers, irq is in i2c_client and chip type
* info comes from i2c_client.dev.platform_data. Meanwhile:
*
* STICK BOARD-SPECIFIC SETUP CODE RIGHT HERE
*/
if (rs5c372->type == rtc_undef) {
rs5c372->type = rtc_rs5c372b;
dev_warn(&client->dev, "assuming rs5c372b\n");
}
/* clock may be set for am/pm or 24 hr time */
switch (rs5c372->type) {
case rtc_rs5c372a:
case rtc_rs5c372b:
/* alarm uses ALARM_A; and nINTRA on 372a, nINTR on 372b.
* so does periodic irq, except some 327a modes.
*/
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24)
rs5c372->time24 = 1;
break;
case rtc_rv5c386:
case rtc_rv5c387a:
if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24)
rs5c372->time24 = 1;
/* alarm uses ALARM_W; and nINTRB for alarm and periodic
* irq, on both 386 and 387
*/
break;
default:
dev_err(&client->dev, "unknown RTC type\n");
goto exit_detach;
}
/* if the oscillator lost power and no other software (like
* the bootloader) set it up, do it here.
*/
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP) {
unsigned char buf[3];
rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP;
buf[0] = RS5C_ADDR(RS5C_REG_CTRL1);
buf[1] = rs5c372->regs[RS5C_REG_CTRL1];
buf[2] = rs5c372->regs[RS5C_REG_CTRL2];
/* use 24hr mode */
switch (rs5c372->type) {
case rtc_rs5c372a:
case rtc_rs5c372b:
buf[2] |= RS5C372_CTRL2_24;
rs5c372->time24 = 1;
break;
case rtc_rv5c386:
case rtc_rv5c387a:
buf[1] |= RV5C387_CTRL1_24;
rs5c372->time24 = 1;
break;
default:
/* impossible */
break;
}
if ((i2c_master_send(client, buf, 3)) != 3) {
dev_err(&client->dev, "setup error\n");
goto exit_detach;
}
rs5c372->regs[RS5C_REG_CTRL1] = buf[1];
rs5c372->regs[RS5C_REG_CTRL2] = buf[2];
}
if (rs5c372_get_datetime(client, &tm) < 0)
dev_warn(&client->dev, "clock needs to be set\n");
dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n",
({ char *s; switch (rs5c372->type) {
case rtc_rs5c372a: s = "rs5c372a"; break;
case rtc_rs5c372b: s = "rs5c372b"; break;
case rtc_rv5c386: s = "rv5c386"; break;
case rtc_rv5c387a: s = "rv5c387a"; break;
default: s = "chip"; break;
}; s;}),
static int rs5c372_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int err = 0;
int smbus_mode = 0;
struct rs5c372 *rs5c372;
struct rtc_time tm;
dev_dbg(&client->dev, "%s\n", __func__);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) {
if (i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_I2C_BLOCK))
smbus_mode = 1;
else {
err = -ENODEV;
goto exit;
}
}
if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
rs5c372->client = client;
i2c_set_clientdata(client, rs5c372);
rs5c372->type = id->driver_data;
rs5c372->regs = &rs5c372->buf[1];
rs5c372->smbus = smbus_mode;
err = rs5c_get_regs(rs5c372);
if (err < 0)
goto exit_kfree;
switch (rs5c372->type) {
case rtc_rs5c372a:
case rtc_rs5c372b:
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24)
rs5c372->time24 = 1;
break;
case rtc_r2025sd:
case rtc_rv5c386:
case rtc_rv5c387a:
if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24)
rs5c372->time24 = 1;
break;
default:
dev_err(&client->dev, "unknown RTC type\n");
goto exit_kfree;
}
err = rs5c_oscillator_setup(rs5c372);
if (unlikely(err < 0)) {
dev_err(&client->dev, "setup error\n");
goto exit_kfree;
}
if (rs5c372_get_datetime(client, &tm) < 0)
dev_warn(&client->dev, "clock needs to be set\n");
dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n",
({ char *s; switch (rs5c372->type) {
case rtc_r2025sd: s = "r2025sd"; break;
case rtc_rs5c372a: s = "rs5c372a"; break;
case rtc_rs5c372b: s = "rs5c372b"; break;
case rtc_rv5c386: s = "rv5c386"; break;
case rtc_rv5c387a: s = "rv5c387a"; break;
default: s = "chip"; break;
}; s;}),
static int rs5c372_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int err = 0;
struct rs5c372 *rs5c372;
struct rtc_time tm;
dev_dbg(&client->dev, "%s\n", __func__);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
err = -ENODEV;
goto exit;
}
if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
rs5c372->client = client;
i2c_set_clientdata(client, rs5c372);
rs5c372->type = id->driver_data;
/* we read registers 0x0f then 0x00-0x0f; skip the first one */
rs5c372->regs = &rs5c372->buf[1];
err = rs5c_get_regs(rs5c372);
if (err < 0)
goto exit_kfree;
/* clock may be set for am/pm or 24 hr time */
switch (rs5c372->type) {
case rtc_rs5c372a:
case rtc_rs5c372b:
/* alarm uses ALARM_A; and nINTRA on 372a, nINTR on 372b.
* so does periodic irq, except some 327a modes.
*/
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24)
rs5c372->time24 = 1;
break;
case rtc_rv5c386:
case rtc_rv5c387a:
if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24)
rs5c372->time24 = 1;
/* alarm uses ALARM_W; and nINTRB for alarm and periodic
* irq, on both 386 and 387
*/
break;
default:
dev_err(&client->dev, "unknown RTC type\n");
goto exit_kfree;
}
/* if the oscillator lost power and no other software (like
* the bootloader) set it up, do it here.
*/
if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP) {
unsigned char buf[3];
rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP;
buf[0] = RS5C_ADDR(RS5C_REG_CTRL1);
buf[1] = rs5c372->regs[RS5C_REG_CTRL1];
buf[2] = rs5c372->regs[RS5C_REG_CTRL2];
/* use 24hr mode */
switch (rs5c372->type) {
case rtc_rs5c372a:
case rtc_rs5c372b:
buf[2] |= RS5C372_CTRL2_24;
rs5c372->time24 = 1;
break;
case rtc_rv5c386:
case rtc_rv5c387a:
buf[1] |= RV5C387_CTRL1_24;
rs5c372->time24 = 1;
break;
default:
/* impossible */
break;
}
if ((i2c_master_send(client, buf, 3)) != 3) {
dev_err(&client->dev, "setup error\n");
goto exit_kfree;
}
rs5c372->regs[RS5C_REG_CTRL1] = buf[1];
rs5c372->regs[RS5C_REG_CTRL2] = buf[2];
}
if (rs5c372_get_datetime(client, &tm) < 0)
dev_warn(&client->dev, "clock needs to be set\n");
dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n",
({ char *s; switch (rs5c372->type) {
case rtc_rs5c372a: s = "rs5c372a"; break;
case rtc_rs5c372b: s = "rs5c372b"; break;
case rtc_rv5c386: s = "rv5c386"; break;
case rtc_rv5c387a: s = "rv5c387a"; break;
default: s = "chip"; break;
}; s;}),
