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/*
* 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/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include "mc13xxx.h"
#define MC13XXX_IRQSTAT0 0
#define MC13XXX_IRQMASK0 1
#define MC13XXX_IRQSTAT1 3
#define MC13XXX_IRQMASK1 4
#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 MC34708_REVISION_REVMETAL (0x07 << 0)
#define MC34708_REVISION_REVFULL (0x07 << 3)
#define MC34708_REVISION_FIN (0x07 << 6)
#define MC34708_REVISION_FAB (0x07 << 9)
#define MC13XXX_ADC1 44
#define MC13XXX_ADC1_ADEN (1 << 0)
#define MC13XXX_ADC1_RAND (1 << 1)
#define MC13XXX_ADC1_ADSEL (1 << 3)
#define MC13XXX_ADC1_ASC (1 << 20)
#define MC13XXX_ADC1_ADTRIGIGN (1 << 21)
#define MC13XXX_ADC2 45
void mc13xxx_lock(struct mc13xxx *mc13xxx)
{
if (!mutex_trylock(&mc13xxx->lock)) {
dev_dbg(mc13xxx->dev, "wait for %s from %pf\n",
__func__, __builtin_return_address(0));
mutex_lock(&mc13xxx->lock);
}
dev_dbg(mc13xxx->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
}
EXPORT_SYMBOL(mc13xxx_lock);
void mc13xxx_unlock(struct mc13xxx *mc13xxx)
{
dev_dbg(mc13xxx->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
mutex_unlock(&mc13xxx->lock);
}
EXPORT_SYMBOL(mc13xxx_unlock);
int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
{
int ret;
ret = regmap_read(mc13xxx->regmap, offset, val);
dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
return ret;
}
EXPORT_SYMBOL(mc13xxx_reg_read);
int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
{
dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val);
if (val >= BIT(24))
return -EINVAL;
return regmap_write(mc13xxx->regmap, offset, val);
}
EXPORT_SYMBOL(mc13xxx_reg_write);
int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
u32 mask, u32 val)
{
BUG_ON(val & ~mask);
dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n",
offset, val, mask);
return regmap_update_bits(mc13xxx->regmap, offset, mask, val);
}
EXPORT_SYMBOL(mc13xxx_reg_rmw);
int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
{
int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
disable_irq_nosync(virq);
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_mask);
int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
{
int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
enable_irq(virq);
return 0;
}
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 >= ARRAY_SIZE(mc13xxx->irqs))
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_request(struct mc13xxx *mc13xxx, int irq,
irq_handler_t handler, const char *name, void *dev)
{
int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
return devm_request_threaded_irq(mc13xxx->dev, virq, NULL, handler,
0, name, dev);
}
EXPORT_SYMBOL(mc13xxx_irq_request);
int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
{
int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
devm_free_irq(mc13xxx->dev, virq, dev);
return 0;
}
EXPORT_SYMBOL(mc13xxx_irq_free);
#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision)
{
dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
"fin: %d, fab: %d, icid: %d/%d\n",
mc13xxx->variant->name,
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));
}
static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision)
{
dev_info(mc13xxx->dev, "%s: rev %d.%d, fin: %d, fab: %d\n",
mc13xxx->variant->name,
maskval(revision, MC34708_REVISION_REVFULL),
maskval(revision, MC34708_REVISION_REVMETAL),
maskval(revision, MC34708_REVISION_FIN),
maskval(revision, MC34708_REVISION_FAB));
}
/* These are only exported for mc13xxx-i2c and mc13xxx-spi */
struct mc13xxx_variant mc13xxx_variant_mc13783 = {
.name = "mc13783",
.print_revision = mc13xxx_print_revision,
};
EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783);
struct mc13xxx_variant mc13xxx_variant_mc13892 = {
.name = "mc13892",
.print_revision = mc13xxx_print_revision,
};
EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892);
struct mc13xxx_variant mc13xxx_variant_mc34708 = {
.name = "mc34708",
.print_revision = mc34708_print_revision,
};
EXPORT_SYMBOL_GPL(mc13xxx_variant_mc34708);
static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
{
return mc13xxx->variant->name;
}
int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
{
return mc13xxx->flags;
}
EXPORT_SYMBOL(mc13xxx_get_flags);
#define MC13XXX_ADC1_CHAN0_SHIFT 5
#define MC13XXX_ADC1_CHAN1_SHIFT 8
#define MC13783_ADC1_ATO_SHIFT 11
#define MC13783_ADC1_ATOX (1 << 19)
struct mc13xxx_adcdone_data {
struct mc13xxx *mc13xxx;
struct completion done;
};
static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
{
struct mc13xxx_adcdone_data *adcdone_data = data;
complete_all(&adcdone_data->done);
return IRQ_HANDLED;
}
#define MC13XXX_ADC_WORKING (1 << 0)
int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
unsigned int channel, u8 ato, bool atox,
unsigned int *sample)
{
u32 adc0, adc1, old_adc0;
int i, ret;
struct mc13xxx_adcdone_data adcdone_data = {
.mc13xxx = mc13xxx,
};
init_completion(&adcdone_data.done);
dev_dbg(mc13xxx->dev, "%s\n", __func__);
mc13xxx_lock(mc13xxx);
if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
ret = -EBUSY;
goto out;
}
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