kevin/linux
1
Fork 0
Code
b73077eb03
linux/drivers/mfd/mc13xxx-core.c
Axel Lin 6991ec255a mfd: Add MODULE_DEVICE_TABLE to mc13xxx-core 
The device table is required to load modules based on modaliases.
After adding the MODULE_DEVICE_TABLE, below entries will be added to
modules.alias:
alias spi:mc13892 mc13xxx_core
alias spi:mc13783 mc13xxx_core

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-23 10:41:59 +01:00

834 lines
20 KiB
C
Raw Blame History

/*
* Copyright 2009-2010 Pengutronix
* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
*
* loosely based on an earlier driver that has
* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/spi/spi.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mc13xxx.h>
struct mc13xxx {
struct spi_device *spidev;
struct mutex lock;
int irq;
irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
void *irqdata[MC13XXX_NUM_IRQ];
};
struct mc13783 {
struct mc13xxx mc13xxx;
int adcflags;
};
struct mc13xxx *mc13783_to_mc13xxx(struct mc13783 *mc13783)
{
return &mc13783->mc13xxx;
}
EXPORT_SYMBOL(mc13783_to_mc13xxx);
#define MC13XXX_IRQSTAT0 0
#define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0)
#define MC13XXX_IRQSTAT0_ADCBISDONEI (1 << 1)
#define MC13XXX_IRQSTAT0_TSI (1 << 2)
#define MC13783_IRQSTAT0_WHIGHI (1 << 3)
#define MC13783_IRQSTAT0_WLOWI (1 << 4)
#define MC13XXX_IRQSTAT0_CHGDETI (1 << 6)
#define MC13783_IRQSTAT0_CHGOVI (1 << 7)
#define MC13XXX_IRQSTAT0_CHGREVI (1 << 8)
#define MC13XXX_IRQSTAT0_CHGSHORTI (1 << 9)
#define MC13XXX_IRQSTAT0_CCCVI (1 << 10)
#define MC13XXX_IRQSTAT0_CHGCURRI (1 << 11)
#define MC13XXX_IRQSTAT0_BPONI (1 << 12)
#define MC13XXX_IRQSTAT0_LOBATLI (1 << 13)
#define MC13XXX_IRQSTAT0_LOBATHI (1 << 14)
#define MC13783_IRQSTAT0_UDPI (1 << 15)
#define MC13783_IRQSTAT0_USBI (1 << 16)
#define MC13783_IRQSTAT0_IDI (1 << 19)
#define MC13783_IRQSTAT0_SE1I (1 << 21)
#define MC13783_IRQSTAT0_CKDETI (1 << 22)
#define MC13783_IRQSTAT0_UDMI (1 << 23)
#define MC13XXX_IRQMASK0 1
#define MC13XXX_IRQMASK0_ADCDONEM MC13XXX_IRQSTAT0_ADCDONEI
#define MC13XXX_IRQMASK0_ADCBISDONEM MC13XXX_IRQSTAT0_ADCBISDONEI
#define MC13XXX_IRQMASK0_TSM MC13XXX_IRQSTAT0_TSI
#define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI
#define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI
#define MC13XXX_IRQMASK0_CHGDETM MC13XXX_IRQSTAT0_CHGDETI
#define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI
#define MC13XXX_IRQMASK0_CHGREVM MC13XXX_IRQSTAT0_CHGREVI
#define MC13XXX_IRQMASK0_CHGSHORTM MC13XXX_IRQSTAT0_CHGSHORTI
#define MC13XXX_IRQMASK0_CCCVM MC13XXX_IRQSTAT0_CCCVI
#define MC13XXX_IRQMASK0_CHGCURRM MC13XXX_IRQSTAT0_CHGCURRI
#define MC13XXX_IRQMASK0_BPONM MC13XXX_IRQSTAT0_BPONI
#define MC13XXX_IRQMASK0_LOBATLM MC13XXX_IRQSTAT0_LOBATLI
#define MC13XXX_IRQMASK0_LOBATHM MC13XXX_IRQSTAT0_LOBATHI
#define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI
#define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI
#define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI
#define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I
#define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI
#define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI
#define MC13XXX_IRQSTAT1 3
#define MC13XXX_IRQSTAT1_1HZI (1 << 0)
#define MC13XXX_IRQSTAT1_TODAI (1 << 1)
#define MC13783_IRQSTAT1_ONOFD1I (1 << 3)
#define MC13783_IRQSTAT1_ONOFD2I (1 << 4)
#define MC13783_IRQSTAT1_ONOFD3I (1 << 5)
#define MC13XXX_IRQSTAT1_SYSRSTI (1 << 6)
#define MC13XXX_IRQSTAT1_RTCRSTI (1 << 7)
#define MC13XXX_IRQSTAT1_PCI (1 << 8)
#define MC13XXX_IRQSTAT1_WARMI (1 << 9)
#define MC13XXX_IRQSTAT1_MEMHLDI (1 << 10)
#define MC13783_IRQSTAT1_PWRRDYI (1 << 11)
#define MC13XXX_IRQSTAT1_THWARNLI (1 << 12)
#define MC13XXX_IRQSTAT1_THWARNHI (1 << 13)
#define MC13XXX_IRQSTAT1_CLKI (1 << 14)
#define MC13783_IRQSTAT1_SEMAFI (1 << 15)
#define MC13783_IRQSTAT1_MC2BI (1 << 17)
#define MC13783_IRQSTAT1_HSDETI (1 << 18)
#define MC13783_IRQSTAT1_HSLI (1 << 19)
#define MC13783_IRQSTAT1_ALSPTHI (1 << 20)
#define MC13783_IRQSTAT1_AHSSHORTI (1 << 21)
#define MC13XXX_IRQMASK1 4
#define MC13XXX_IRQMASK1_1HZM MC13XXX_IRQSTAT1_1HZI
#define MC13XXX_IRQMASK1_TODAM MC13XXX_IRQSTAT1_TODAI
#define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I
#define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I
#define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I
#define MC13XXX_IRQMASK1_SYSRSTM MC13XXX_IRQSTAT1_SYSRSTI
#define MC13XXX_IRQMASK1_RTCRSTM MC13XXX_IRQSTAT1_RTCRSTI
#define MC13XXX_IRQMASK1_PCM MC13XXX_IRQSTAT1_PCI
#define MC13XXX_IRQMASK1_WARMM MC13XXX_IRQSTAT1_WARMI
#define MC13XXX_IRQMASK1_MEMHLDM MC13XXX_IRQSTAT1_MEMHLDI
#define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI
#define MC13XXX_IRQMASK1_THWARNLM MC13XXX_IRQSTAT1_THWARNLI
#define MC13XXX_IRQMASK1_THWARNHM MC13XXX_IRQSTAT1_THWARNHI
#define MC13XXX_IRQMASK1_CLKM MC13XXX_IRQSTAT1_CLKI
#define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI
#define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI
#define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI
#define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI
#define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI
#define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI
#define MC13XXX_REVISION 7
#define MC13XXX_REVISION_REVMETAL (0x07 << 0)
#define MC13XXX_REVISION_REVFULL (0x03 << 3)
#define MC13XXX_REVISION_ICID (0x07 << 6)
#define MC13XXX_REVISION_FIN (0x03 << 9)
#define MC13XXX_REVISION_FAB (0x03 << 11)
#define MC13XXX_REVISION_ICIDCODE (0x3f << 13)
#define MC13783_ADC1 44
#define MC13783_ADC1_ADEN (1 << 0)
#define MC13783_ADC1_RAND (1 << 1)
#define MC13783_ADC1_ADSEL (1 << 3)
#define MC13783_ADC1_ASC (1 << 20)
#define MC13783_ADC1_ADTRIGIGN (1 << 21)
#define MC13783_ADC2 45
#define MC13XXX_NUMREGS 0x3f
void mc13xxx_lock(struct mc13xxx *mc13xxx)
{
if (!mutex_trylock(&mc13xxx->lock)) {
dev_dbg(&mc13xxx->spidev->dev, "wait for %s from %pf\n",
__func__, __builtin_return_address(0));
mutex_lock(&mc13xxx->lock);
}
dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
}
EXPORT_SYMBOL(mc13xxx_lock);
void mc13xxx_unlock(struct mc13xxx *mc13xxx)
{
dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
mutex_unlock(&mc13xxx->lock);
}
EXPORT_SYMBOL(mc13xxx_unlock);
#define MC13XXX_REGOFFSET_SHIFT 25
int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
{
struct spi_transfer t;
struct spi_message m;
int ret;
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
if (offset > MC13XXX_NUMREGS)
return -EINVAL;
*val = offset << MC13XXX_REGOFFSET_SHIFT;
memset(&t, 0, sizeof(t));
t.tx_buf = val;
t.rx_buf = val;
t.len = sizeof(u32);
spi_message_init(&m);
spi_message_add_tail(&t, &m);
ret = spi_sync(mc13xxx->spidev, &m);
/* error in message.status implies error return from spi_sync */
BUG_ON(!ret && m.status);
if (ret)
return ret;
*val &= 0xffffff;
dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
return 0;
}
EXPORT_SYMBOL(mc13xxx_reg_read);
int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
{
u32 buf;
struct spi_transfer t;
struct spi_message m;
int ret;
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val);
if (offset > MC13XXX_NUMREGS || val > 0xffffff)
return -EINVAL;
buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val;
memset(&t, 0, sizeof(t));
t.tx_buf = &buf;
t.rx_buf = &buf;
t.len = sizeof(u32);
spi_message_init(&m);
spi_message_add_tail(&t, &m);
ret = spi_sync(mc13xxx->spidev, &m);
BUG_ON(!ret && m.status);
if (ret)
return ret;
return 0;
}
EXPORT_SYMBOL(mc13xxx_reg_write);
int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
u32 mask, u32 val)
{
int ret;
u32 valread;
BUG_ON(val & ~mask);
ret = mc13xxx_reg_read(mc13xxx, offset, &valread);
if (ret)
return ret;
valread = (valread & ~mask) | val;
return mc13xxx_reg_write(mc13xxx, offset, valread);
}
EXPORT_SYMBOL(mc13xxx_reg_rmw);
int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
{
int ret;
unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
u32 mask;
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
if (mask & irqbit)
/* already masked */
return 0;
return mc13xxx_reg_write(mc13xxx, offmask, mask | irqbit);
}
EXPORT_SYMBOL(mc13xxx_irq_mask);
int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
{
int ret;
unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
u32 mask;
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
if (!(mask & irqbit))
/* already unmasked */
return 0;
return mc13xxx_reg_write(mc13xxx, offmask, mask & ~irqbit);
}
EXPORT_SYMBOL(mc13xxx_irq_unmask);
int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq,
int *enabled, int *pending)
{
int ret;
unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
if (enabled) {
u32 mask;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
*enabled = mask & irqbit;
}
if (pending) {
u32 stat;
ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
if (ret)
return ret;
*pending = stat & irqbit;
}
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_status);
int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq)
{
unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
unsigned int val = 1 << (irq < 24 ? irq : irq - 24);
BUG_ON(irq < 0 || irq >= MC13XXX_NUM_IRQ);
return mc13xxx_reg_write(mc13xxx, offstat, val);
}
EXPORT_SYMBOL(mc13xxx_irq_ack);
int mc13xxx_irq_request_nounmask(struct mc13xxx *mc13xxx, int irq,
irq_handler_t handler, const char *name, void *dev)
{
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
BUG_ON(!handler);
if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
return -EINVAL;
if (mc13xxx->irqhandler[irq])
return -EBUSY;
mc13xxx->irqhandler[irq] = handler;
mc13xxx->irqdata[irq] = dev;
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_request_nounmask);
int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq,
irq_handler_t handler, const char *name, void *dev)
{
int ret;
ret = mc13xxx_irq_request_nounmask(mc13xxx, irq, handler, name, dev);
if (ret)
return ret;
ret = mc13xxx_irq_unmask(mc13xxx, irq);
if (ret) {
mc13xxx->irqhandler[irq] = NULL;
mc13xxx->irqdata[irq] = NULL;
return ret;
}
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_request);
int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
{
int ret;
BUG_ON(!mutex_is_locked(&mc13xxx->lock));
if (irq < 0 || irq >= MC13XXX_NUM_IRQ || !mc13xxx->irqhandler[irq] ||
mc13xxx->irqdata[irq] != dev)
return -EINVAL;
ret = mc13xxx_irq_mask(mc13xxx, irq);
if (ret)
return ret;
mc13xxx->irqhandler[irq] = NULL;
mc13xxx->irqdata[irq] = NULL;
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_free);
static inline irqreturn_t mc13xxx_irqhandler(struct mc13xxx *mc13xxx, int irq)
{
return mc13xxx->irqhandler[irq](irq, mc13xxx->irqdata[irq]);
}
/*
* returns: number of handled irqs or negative error
* locking: holds mc13xxx->lock
*/
static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx,
unsigned int offstat, unsigned int offmask, int baseirq)
{
u32 stat, mask;
int ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
int num_handled = 0;
if (ret)
return ret;
ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
if (ret)
return ret;
while (stat & ~mask) {
int irq = __ffs(stat & ~mask);
stat &= ~(1 << irq);
if (likely(mc13xxx->irqhandler[baseirq + irq])) {
irqreturn_t handled;
handled = mc13xxx_irqhandler(mc13xxx, baseirq + irq);
if (handled == IRQ_HANDLED)
num_handled++;
} else {
dev_err(&mc13xxx->spidev->dev,
"BUG: irq %u but no handler\n",
baseirq + irq);
mask |= 1 << irq;
ret = mc13xxx_reg_write(mc13xxx, offmask, mask);
}
}
return num_handled;
}
static irqreturn_t mc13xxx_irq_thread(int irq, void *data)
{
struct mc13xxx *mc13xxx = data;
irqreturn_t ret;
int handled = 0;
mc13xxx_lock(mc13xxx);
ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT0,
MC13XXX_IRQMASK0, 0);
if (ret > 0)
handled = 1;
ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT1,
MC13XXX_IRQMASK1, 24);
if (ret > 0)
handled = 1;
mc13xxx_unlock(mc13xxx);
return IRQ_RETVAL(handled);
}
enum mc13xxx_id {
MC13XXX_ID_MC13783,
MC13XXX_ID_MC13892,
MC13XXX_ID_INVALID,
};
const char *mc13xxx_chipname[] = {
[MC13XXX_ID_MC13783] = "mc13783",
[MC13XXX_ID_MC13892] = "mc13892",
};
#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id)
{
u32 icid;
u32 revision;
const char *name;
int ret;
ret = mc13xxx_reg_read(mc13xxx, 46, &icid);
if (ret)
return ret;
icid = (icid >> 6) & 0x7;
switch (icid) {
case 2:
*id = MC13XXX_ID_MC13783;
name = "mc13783";
break;
case 7:
*id = MC13XXX_ID_MC13892;
name = "mc13892";
break;
default:
*id = MC13XXX_ID_INVALID;
break;
}
if (*id == MC13XXX_ID_MC13783 || *id == MC13XXX_ID_MC13892) {
ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
if (ret)
return ret;
dev_info(&mc13xxx->spidev->dev, "%s: rev: %d.%d, "
"fin: %d, fab: %d, icid: %d/%d\n",
mc13xxx_chipname[*id],
maskval(revision, MC13XXX_REVISION_REVFULL),
maskval(revision, MC13XXX_REVISION_REVMETAL),
maskval(revision, MC13XXX_REVISION_FIN),
maskval(revision, MC13XXX_REVISION_FAB),
maskval(revision, MC13XXX_REVISION_ICID),
maskval(revision, MC13XXX_REVISION_ICIDCODE));
}
if (*id != MC13XXX_ID_INVALID) {
const struct spi_device_id *devid =
spi_get_device_id(mc13xxx->spidev);
if (!devid || devid->driver_data != *id)
dev_warn(&mc13xxx->spidev->dev, "device id doesn't "
"match auto detection!\n");
}
return 0;
}
static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
{
const struct spi_device_id *devid =
spi_get_device_id(mc13xxx->spidev);
if (!devid)
return NULL;
return mc13xxx_chipname[devid->driver_data];
}
#include <linux/mfd/mc13783.h>
int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
{
struct mc13xxx_platform_data *pdata =
dev_get_platdata(&mc13xxx->spidev->dev);
return pdata->flags;
}
EXPORT_SYMBOL(mc13xxx_get_flags);
#define MC13783_ADC1_CHAN0_SHIFT 5
#define MC13783_ADC1_CHAN1_SHIFT 8
struct mc13xxx_adcdone_data {
struct mc13xxx *mc13xxx;
struct completion done;
};
static irqreturn_t mc13783_handler_adcdone(int irq, void *data)
{
struct mc13xxx_adcdone_data *adcdone_data = data;
mc13xxx_irq_ack(adcdone_data->mc13xxx, irq);
complete_all(&adcdone_data->done);
return IRQ_HANDLED;
}
#define MC13783_ADC_WORKING (1 << 0)
int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,
unsigned int channel, unsigned int *sample)
{
struct mc13xxx *mc13xxx = &mc13783->mc13xxx;
u32 adc0, adc1, old_adc0;
int i, ret;
struct mc13xxx_adcdone_data adcdone_data = {
.mc13xxx = mc13xxx,
};
init_completion(&adcdone_data.done);
dev_dbg(&mc13xxx->spidev->dev, "%s\n", __func__);
mc13xxx_lock(mc13xxx);
if (mc13783->adcflags & MC13783_ADC_WORKING) {
ret = -EBUSY;
goto out;
}
mc13783->adcflags |= MC13783_ADC_WORKING;
mc13xxx_reg_read(mc13xxx, MC13783_ADC0, &old_adc0);
adc0 = MC13783_ADC0_ADINC1 | MC13783_ADC0_ADINC2;
adc1 = MC13783_ADC1_ADEN | MC13783_ADC1_ADTRIGIGN | MC13783_ADC1_ASC;
if (channel > 7)
adc1 |= MC13783_ADC1_ADSEL;
switch (mode) {
case MC13783_ADC_MODE_TS:
adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_TSMOD0 |
MC13783_ADC0_TSMOD1;
adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
break;
case MC13783_ADC_MODE_SINGLE_CHAN:
adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
adc1 |= (channel & 0x7) << MC13783_ADC1_CHAN0_SHIFT;
adc1 |= MC13783_ADC1_RAND;
break;
case MC13783_ADC_MODE_MULT_CHAN:
adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
break;
default:
mc13783_unlock(mc13783);
return -EINVAL;
}
dev_dbg(&mc13783->mc13xxx.spidev->dev, "%s: request irq\n", __func__);
mc13xxx_irq_request(mc13xxx, MC13783_IRQ_ADCDONE,
mc13783_handler_adcdone, __func__, &adcdone_data);
mc13xxx_irq_ack(mc13xxx, MC13783_IRQ_ADCDONE);
mc13xxx_reg_write(mc13xxx, MC13783_ADC0, adc0);
mc13xxx_reg_write(mc13xxx, MC13783_ADC1, adc1);
mc13xxx_unlock(mc13xxx);
ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
if (!ret)
ret = -ETIMEDOUT;
mc13xxx_lock(mc13xxx);
mc13xxx_irq_free(mc13xxx, MC13783_IRQ_ADCDONE, &adcdone_data);
if (ret > 0)
for (i = 0; i < 4; ++i) {
ret = mc13xxx_reg_read(mc13xxx,
MC13783_ADC2, &sample[i]);
if (ret)
break;
}
if (mode == MC13783_ADC_MODE_TS)
/* restore TSMOD */
mc13xxx_reg_write(mc13xxx, MC13783_ADC0, old_adc0);
mc13783->adcflags &= ~MC13783_ADC_WORKING;
out:
mc13xxx_unlock(mc13xxx);
return ret;
}
EXPORT_SYMBOL_GPL(mc13783_adc_do_conversion);
static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
const char *format, void *pdata)
{
char buf[30];
const char *name = mc13xxx_get_chipname(mc13xxx);
struct mfd_cell cell = {
.mfd_data = pdata,
};
/* there is no asnprintf in the kernel :-( */
if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
return -E2BIG;
cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
if (!cell.name)
return -ENOMEM;
return mfd_add_devices(&mc13xxx->spidev->dev, -1, &cell, 1, NULL, 0);
}
static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
{
return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL);
}
static int mc13xxx_probe(struct spi_device *spi)
{
struct mc13xxx *mc13xxx;
struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
enum mc13xxx_id id;
int ret;
mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
if (!mc13xxx)
return -ENOMEM;
dev_set_drvdata(&spi->dev, mc13xxx);
spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
spi->bits_per_word = 32;
spi_setup(spi);
mc13xxx->spidev = spi;
mutex_init(&mc13xxx->lock);
mc13xxx_lock(mc13xxx);
ret = mc13xxx_identify(mc13xxx, &id);
if (ret || id == MC13XXX_ID_INVALID)
goto err_revision;
/* mask all irqs */
ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff);
if (ret)
goto err_mask;
ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff);
if (ret)
goto err_mask;
ret = request_threaded_irq(spi->irq, NULL, mc13xxx_irq_thread,
IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx);
if (ret) {
err_mask:
err_revision:
mc13xxx_unlock(mc13xxx);
dev_set_drvdata(&spi->dev, NULL);
kfree(mc13xxx);
return ret;
}
mc13xxx_unlock(mc13xxx);
if (pdata->flags & MC13XXX_USE_ADC)
mc13xxx_add_subdevice(mc13xxx, "%s-adc");
if (pdata->flags & MC13XXX_USE_CODEC)
mc13xxx_add_subdevice(mc13xxx, "%s-codec");
if (pdata->flags & MC13XXX_USE_REGULATOR) {
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
&pdata->regulators);
}
if (pdata->flags & MC13XXX_USE_RTC)
mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
if (pdata->flags & MC13XXX_USE_TOUCHSCREEN)
mc13xxx_add_subdevice(mc13xxx, "%s-ts");
if (pdata->flags & MC13XXX_USE_LED)
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led", pdata->leds);
return 0;
}
static int __devexit mc13xxx_remove(struct spi_device *spi)
{
struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
free_irq(mc13xxx->spidev->irq, mc13xxx);
mfd_remove_devices(&spi->dev);
kfree(mc13xxx);
return 0;
}
static const struct spi_device_id mc13xxx_device_id[] = {
{
.name = "mc13783",
.driver_data = MC13XXX_ID_MC13783,
}, {
.name = "mc13892",
.driver_data = MC13XXX_ID_MC13892,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
static struct spi_driver mc13xxx_driver = {
.id_table = mc13xxx_device_id,
.driver = {
.name = "mc13xxx",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = mc13xxx_probe,
.remove = __devexit_p(mc13xxx_remove),
};
static int __init mc13xxx_init(void)
{
return spi_register_driver(&mc13xxx_driver);
}
subsys_initcall(mc13xxx_init);
static void __exit mc13xxx_exit(void)
{
spi_unregister_driver(&mc13xxx_driver);
}
module_exit(mc13xxx_exit);
MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
MODULE_LICENSE("GPL v2");
View Git Blame Copy Permalink