AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-28 03:15:23 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
8475355f7a
linux_dsm_epyc7002/drivers/mfd/ab8500-core.c
Dan Carpenter 10628e3ecf mfd: ab8500-core: Return zero in get_register_interruptible() 
This function is supposed to return zero on success or negative error
codes on error.  Unfortunately, there is a bug so it sometimes returns
non-zero, positive numbers on success.

I noticed this bug during review and I can't test it.  It does appear
that the return is sometimes propogated back to _regmap_read() where all
non-zero returns are treated as failure so this may affect run time.

Fixes: 47c1697508 ("mfd: Align ab8500 with the abx500 interface")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2019-01-03 08:32:42 +00:00

1353 lines
32 KiB
C
Raw Blame History

/*
* Copyright (C) ST-Ericsson SA 2010
*
* License Terms: GNU General Public License v2
* Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
* Author: Rabin Vincent <rabin.vincent@stericsson.com>
* Author: Mattias Wallin <mattias.wallin@stericsson.com>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/regulator/ab8500.h>
#include <linux/of.h>
#include <linux/of_device.h>
/*
* Interrupt register offsets
* Bank : 0x0E
*/
#define AB8500_IT_SOURCE1_REG 0x00
#define AB8500_IT_SOURCE2_REG 0x01
#define AB8500_IT_SOURCE3_REG 0x02
#define AB8500_IT_SOURCE4_REG 0x03
#define AB8500_IT_SOURCE5_REG 0x04
#define AB8500_IT_SOURCE6_REG 0x05
#define AB8500_IT_SOURCE7_REG 0x06
#define AB8500_IT_SOURCE8_REG 0x07
#define AB9540_IT_SOURCE13_REG 0x0C
#define AB8500_IT_SOURCE19_REG 0x12
#define AB8500_IT_SOURCE20_REG 0x13
#define AB8500_IT_SOURCE21_REG 0x14
#define AB8500_IT_SOURCE22_REG 0x15
#define AB8500_IT_SOURCE23_REG 0x16
#define AB8500_IT_SOURCE24_REG 0x17
/*
* latch registers
*/
#define AB8500_IT_LATCH1_REG 0x20
#define AB8500_IT_LATCH2_REG 0x21
#define AB8500_IT_LATCH3_REG 0x22
#define AB8500_IT_LATCH4_REG 0x23
#define AB8500_IT_LATCH5_REG 0x24
#define AB8500_IT_LATCH6_REG 0x25
#define AB8500_IT_LATCH7_REG 0x26
#define AB8500_IT_LATCH8_REG 0x27
#define AB8500_IT_LATCH9_REG 0x28
#define AB8500_IT_LATCH10_REG 0x29
#define AB8500_IT_LATCH12_REG 0x2B
#define AB9540_IT_LATCH13_REG 0x2C
#define AB8500_IT_LATCH19_REG 0x32
#define AB8500_IT_LATCH20_REG 0x33
#define AB8500_IT_LATCH21_REG 0x34
#define AB8500_IT_LATCH22_REG 0x35
#define AB8500_IT_LATCH23_REG 0x36
#define AB8500_IT_LATCH24_REG 0x37
/*
* mask registers
*/
#define AB8500_IT_MASK1_REG 0x40
#define AB8500_IT_MASK2_REG 0x41
#define AB8500_IT_MASK3_REG 0x42
#define AB8500_IT_MASK4_REG 0x43
#define AB8500_IT_MASK5_REG 0x44
#define AB8500_IT_MASK6_REG 0x45
#define AB8500_IT_MASK7_REG 0x46
#define AB8500_IT_MASK8_REG 0x47
#define AB8500_IT_MASK9_REG 0x48
#define AB8500_IT_MASK10_REG 0x49
#define AB8500_IT_MASK11_REG 0x4A
#define AB8500_IT_MASK12_REG 0x4B
#define AB8500_IT_MASK13_REG 0x4C
#define AB8500_IT_MASK14_REG 0x4D
#define AB8500_IT_MASK15_REG 0x4E
#define AB8500_IT_MASK16_REG 0x4F
#define AB8500_IT_MASK17_REG 0x50
#define AB8500_IT_MASK18_REG 0x51
#define AB8500_IT_MASK19_REG 0x52
#define AB8500_IT_MASK20_REG 0x53
#define AB8500_IT_MASK21_REG 0x54
#define AB8500_IT_MASK22_REG 0x55
#define AB8500_IT_MASK23_REG 0x56
#define AB8500_IT_MASK24_REG 0x57
#define AB8500_IT_MASK25_REG 0x58
/*
* latch hierarchy registers
*/
#define AB8500_IT_LATCHHIER1_REG 0x60
#define AB8500_IT_LATCHHIER2_REG 0x61
#define AB8500_IT_LATCHHIER3_REG 0x62
#define AB8540_IT_LATCHHIER4_REG 0x63
#define AB8500_IT_LATCHHIER_NUM 3
#define AB8540_IT_LATCHHIER_NUM 4
#define AB8500_REV_REG 0x80
#define AB8500_IC_NAME_REG 0x82
#define AB8500_SWITCH_OFF_STATUS 0x00
#define AB8500_TURN_ON_STATUS 0x00
#define AB8505_TURN_ON_STATUS_2 0x04
#define AB8500_CH_USBCH_STAT1_REG 0x02
#define VBUS_DET_DBNC100 0x02
#define VBUS_DET_DBNC1 0x01
static DEFINE_SPINLOCK(on_stat_lock);
static u8 turn_on_stat_mask = 0xFF;
static u8 turn_on_stat_set;
static bool no_bm; /* No battery management */
/*
* not really modular, but the easiest way to keep compat with existing
* bootargs behaviour is to continue using module_param here.
*/
module_param(no_bm, bool, S_IRUGO);
#define AB9540_MODEM_CTRL2_REG 0x23
#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2)
/*
* Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
* numbers are indexed into this array with (num / 8). The interupts are
* defined in linux/mfd/ab8500.h
*
* This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
* offset 0.
*/
/* AB8500 support */
static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
};
/* AB9540 / AB8505 support */
static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
};
/* AB8540 support */
static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
23, 25, 26, 27, 28, 29, 30, 31,
};
static const char ab8500_version_str[][7] = {
[AB8500_VERSION_AB8500] = "AB8500",
[AB8500_VERSION_AB8505] = "AB8505",
[AB8500_VERSION_AB9540] = "AB9540",
[AB8500_VERSION_AB8540] = "AB8540",
};
static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
{
int ret;
ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
if (ret < 0)
dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
return ret;
}
static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
u8 data)
{
int ret;
ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
&mask, 1);
if (ret < 0)
dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
return ret;
}
static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
{
int ret;
u8 data;
ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
if (ret < 0) {
dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
return ret;
}
return (int)data;
}
static int ab8500_get_chip_id(struct device *dev)
{
struct ab8500 *ab8500;
if (!dev)
return -EINVAL;
ab8500 = dev_get_drvdata(dev->parent);
return ab8500 ? (int)ab8500->chip_id : -EINVAL;
}
static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
u8 reg, u8 data)
{
int ret;
/*
* Put the u8 bank and u8 register together into a an u16.
* The bank on higher 8 bits and register in lower 8 bits.
*/
u16 addr = ((u16)bank) << 8 | reg;
dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
mutex_lock(&ab8500->lock);
ret = ab8500->write(ab8500, addr, data);
if (ret < 0)
dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
addr, ret);
mutex_unlock(&ab8500->lock);
return ret;
}
static int ab8500_set_register(struct device *dev, u8 bank,
u8 reg, u8 value)
{
int ret;
struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
atomic_inc(&ab8500->transfer_ongoing);
ret = set_register_interruptible(ab8500, bank, reg, value);
atomic_dec(&ab8500->transfer_ongoing);
return ret;
}
static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
u8 reg, u8 *value)
{
int ret;
u16 addr = ((u16)bank) << 8 | reg;
mutex_lock(&ab8500->lock);
ret = ab8500->read(ab8500, addr);
if (ret < 0)
dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
addr, ret);
else
*value = ret;
mutex_unlock(&ab8500->lock);
dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
return (ret < 0) ? ret : 0;
}
static int ab8500_get_register(struct device *dev, u8 bank,
u8 reg, u8 *value)
{
int ret;
struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
atomic_inc(&ab8500->transfer_ongoing);
ret = get_register_interruptible(ab8500, bank, reg, value);
atomic_dec(&ab8500->transfer_ongoing);
return ret;
}
static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
u8 reg, u8 bitmask, u8 bitvalues)
{
int ret;
u16 addr = ((u16)bank) << 8 | reg;
mutex_lock(&ab8500->lock);
if (ab8500->write_masked == NULL) {
u8 data;
ret = ab8500->read(ab8500, addr);
if (ret < 0) {
dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
addr, ret);
goto out;
}
data = (u8)ret;
data = (~bitmask & data) | (bitmask & bitvalues);
ret = ab8500->write(ab8500, addr, data);
if (ret < 0)
dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
addr, ret);
dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
data);
goto out;
}
ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
if (ret < 0)
dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
ret);
out:
mutex_unlock(&ab8500->lock);
return ret;
}
static int ab8500_mask_and_set_register(struct device *dev,
u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
{
int ret;
struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
atomic_inc(&ab8500->transfer_ongoing);
ret = mask_and_set_register_interruptible(ab8500, bank, reg,
bitmask, bitvalues);
atomic_dec(&ab8500->transfer_ongoing);
return ret;
}
static struct abx500_ops ab8500_ops = {
.get_chip_id = ab8500_get_chip_id,
.get_register = ab8500_get_register,
.set_register = ab8500_set_register,
.get_register_page = NULL,
.set_register_page = NULL,
.mask_and_set_register = ab8500_mask_and_set_register,
.event_registers_startup_state_get = NULL,
.startup_irq_enabled = NULL,
.dump_all_banks = ab8500_dump_all_banks,
};
static void ab8500_irq_lock(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
mutex_lock(&ab8500->irq_lock);
atomic_inc(&ab8500->transfer_ongoing);
}
static void ab8500_irq_sync_unlock(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
int i;
for (i = 0; i < ab8500->mask_size; i++) {
u8 old = ab8500->oldmask[i];
u8 new = ab8500->mask[i];
int reg;
if (new == old)
continue;
/*
* Interrupt register 12 doesn't exist prior to AB8500 version
* 2.0
*/
if (ab8500->irq_reg_offset[i] == 11 &&
is_ab8500_1p1_or_earlier(ab8500))
continue;
if (ab8500->irq_reg_offset[i] < 0)
continue;
ab8500->oldmask[i] = new;
reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
}
atomic_dec(&ab8500->transfer_ongoing);
mutex_unlock(&ab8500->irq_lock);
}
static void ab8500_irq_mask(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
int offset = data->hwirq;
int index = offset / 8;
int mask = 1 << (offset % 8);
ab8500->mask[index] |= mask;
/* The AB8500 GPIOs have two interrupts each (rising & falling). */
if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
ab8500->mask[index + 2] |= mask;
if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
ab8500->mask[index + 1] |= mask;
if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
/* Here the falling IRQ is one bit lower */
ab8500->mask[index] |= (mask << 1);
}
static void ab8500_irq_unmask(struct irq_data *data)
{
struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
unsigned int type = irqd_get_trigger_type(data);
int offset = data->hwirq;
int index = offset / 8;
int mask = 1 << (offset % 8);
if (type & IRQ_TYPE_EDGE_RISING)
ab8500->mask[index] &= ~mask;
/* The AB8500 GPIOs have two interrupts each (rising & falling). */
if (type & IRQ_TYPE_EDGE_FALLING) {
if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
ab8500->mask[index + 2] &= ~mask;
else if (offset >= AB9540_INT_GPIO50R &&
offset <= AB9540_INT_GPIO54R)
ab8500->mask[index + 1] &= ~mask;
else if (offset == AB8540_INT_GPIO43R ||
offset == AB8540_INT_GPIO44R)
/* Here the falling IRQ is one bit lower */
ab8500->mask[index] &= ~(mask << 1);
else
ab8500->mask[index] &= ~mask;
} else {
/* Satisfies the case where type is not set. */
ab8500->mask[index] &= ~mask;
}
}
static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
{
return 0;
}
static struct irq_chip ab8500_irq_chip = {
.name = "ab8500",
.irq_bus_lock = ab8500_irq_lock,
.irq_bus_sync_unlock = ab8500_irq_sync_unlock,
.irq_mask = ab8500_irq_mask,
.irq_disable = ab8500_irq_mask,
.irq_unmask = ab8500_irq_unmask,
.irq_set_type = ab8500_irq_set_type,
};
static void update_latch_offset(u8 *offset, int i)
{
/* Fix inconsistent ITFromLatch25 bit mapping... */
if (unlikely(*offset == 17))
*offset = 24;
/* Fix inconsistent ab8540 bit mapping... */
if (unlikely(*offset == 16))
*offset = 25;
if ((i == 3) && (*offset >= 24))
*offset += 2;
}
static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
int latch_offset, u8 latch_val)
{
int int_bit, line, i;
for (i = 0; i < ab8500->mask_size; i++)
if (ab8500->irq_reg_offset[i] == latch_offset)
break;
if (i >= ab8500->mask_size) {
dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
latch_offset);
return -ENXIO;
}
/* ignore masked out interrupts */
latch_val &= ~ab8500->mask[i];
while (latch_val) {
int_bit = __ffs(latch_val);
line = (i << 3) + int_bit;
latch_val &= ~(1 << int_bit);
/*
* This handles the falling edge hwirqs from the GPIO
* lines. Route them back to the line registered for the
* rising IRQ, as this is merely a flag for the same IRQ
* in linux terms.
*/
if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
line -= 16;
if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
line -= 8;
if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
line += 1;
handle_nested_irq(irq_create_mapping(ab8500->domain, line));
}
return 0;
}
static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
int hier_offset, u8 hier_val)
{
int latch_bit, status;
u8 latch_offset, latch_val;
do {
latch_bit = __ffs(hier_val);
latch_offset = (hier_offset << 3) + latch_bit;
update_latch_offset(&latch_offset, hier_offset);
status = get_register_interruptible(ab8500,
AB8500_INTERRUPT,
AB8500_IT_LATCH1_REG + latch_offset,
&latch_val);
if (status < 0 || latch_val == 0)
goto discard;
status = ab8500_handle_hierarchical_line(ab8500,
latch_offset, latch_val);
if (status < 0)
return status;
discard:
hier_val &= ~(1 << latch_bit);
} while (hier_val);
return 0;
}
static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
{
struct ab8500 *ab8500 = dev;
u8 i;
dev_vdbg(ab8500->dev, "interrupt\n");
/* Hierarchical interrupt version */
for (i = 0; i < (ab8500->it_latchhier_num); i++) {
int status;
u8 hier_val;
status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_LATCHHIER1_REG + i, &hier_val);
if (status < 0 || hier_val == 0)
continue;
status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
if (status < 0)
break;
}
return IRQ_HANDLED;
}
static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hwirq)
{
struct ab8500 *ab8500 = d->host_data;
if (!ab8500)
return -EINVAL;
irq_set_chip_data(virq, ab8500);
irq_set_chip_and_handler(virq, &ab8500_irq_chip,
handle_simple_irq);
irq_set_nested_thread(virq, 1);
irq_set_noprobe(virq);
return 0;
}
static const struct irq_domain_ops ab8500_irq_ops = {
.map = ab8500_irq_map,
.xlate = irq_domain_xlate_twocell,
};
static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
{
int num_irqs;
if (is_ab8540(ab8500))
num_irqs = AB8540_NR_IRQS;
else if (is_ab9540(ab8500))
num_irqs = AB9540_NR_IRQS;
else if (is_ab8505(ab8500))
num_irqs = AB8505_NR_IRQS;
else
num_irqs = AB8500_NR_IRQS;
/* If ->irq_base is zero this will give a linear mapping */
ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
num_irqs, 0,
&ab8500_irq_ops, ab8500);
if (!ab8500->domain) {
dev_err(ab8500->dev, "Failed to create irqdomain\n");
return -ENODEV;
}
return 0;
}
int ab8500_suspend(struct ab8500 *ab8500)
{
if (atomic_read(&ab8500->transfer_ongoing))
return -EINVAL;
return 0;
}
static const struct mfd_cell ab8500_bm_devs[] = {
{
.name = "ab8500-charger",
.of_compatible = "stericsson,ab8500-charger",
.platform_data = &ab8500_bm_data,
.pdata_size = sizeof(ab8500_bm_data),
},
{
.name = "ab8500-btemp",
.of_compatible = "stericsson,ab8500-btemp",
.platform_data = &ab8500_bm_data,
.pdata_size = sizeof(ab8500_bm_data),
},
{
.name = "ab8500-fg",
.of_compatible = "stericsson,ab8500-fg",
.platform_data = &ab8500_bm_data,
.pdata_size = sizeof(ab8500_bm_data),
},
{
.name = "ab8500-chargalg",
.of_compatible = "stericsson,ab8500-chargalg",
.platform_data = &ab8500_bm_data,
.pdata_size = sizeof(ab8500_bm_data),
},
};
static const struct mfd_cell ab8500_devs[] = {
#ifdef CONFIG_DEBUG_FS
{
.name = "ab8500-debug",
.of_compatible = "stericsson,ab8500-debug",
},
#endif
{
.name = "ab8500-sysctrl",
.of_compatible = "stericsson,ab8500-sysctrl",
},
{
.name = "ab8500-ext-regulator",
.of_compatible = "stericsson,ab8500-ext-regulator",
},
{
.name = "ab8500-regulator",
.of_compatible = "stericsson,ab8500-regulator",
},
{
.name = "ab8500-clk",
.of_compatible = "stericsson,ab8500-clk",
},
{
.name = "ab8500-gpadc",
.of_compatible = "stericsson,ab8500-gpadc",
},
{
.name = "ab8500-rtc",
.of_compatible = "stericsson,ab8500-rtc",
},
{
.name = "ab8500-acc-det",
.of_compatible = "stericsson,ab8500-acc-det",
},
{
.name = "ab8500-poweron-key",
.of_compatible = "stericsson,ab8500-poweron-key",
},
{
.name = "ab8500-pwm",
.of_compatible = "stericsson,ab8500-pwm",
.id = 1,
},
{
.name = "ab8500-pwm",
.of_compatible = "stericsson,ab8500-pwm",
.id = 2,
},
{
.name = "ab8500-pwm",
.of_compatible = "stericsson,ab8500-pwm",
.id = 3,
},
{
.name = "ab8500-denc",
.of_compatible = "stericsson,ab8500-denc",
},
{
.name = "pinctrl-ab8500",
.of_compatible = "stericsson,ab8500-gpio",
},
{
.name = "abx500-temp",
.of_compatible = "stericsson,abx500-temp",
},
{
.name = "ab8500-usb",
.of_compatible = "stericsson,ab8500-usb",
},
{
.name = "ab8500-codec",
.of_compatible = "stericsson,ab8500-codec",
},
};
static const struct mfd_cell ab9540_devs[] = {
#ifdef CONFIG_DEBUG_FS
{
.name = "ab8500-debug",
},
#endif
{
.name = "ab8500-sysctrl",
},
{
.name = "ab8500-ext-regulator",
},
{
.name = "ab8500-regulator",
},
{
.name = "abx500-clk",
.of_compatible = "stericsson,abx500-clk",
},
{
.name = "ab8500-gpadc",
.of_compatible = "stericsson,ab8500-gpadc",
},
{
.name = "ab8500-rtc",
},
{
.name = "ab8500-acc-det",
},
{
.name = "ab8500-poweron-key",
},
{
.name = "ab8500-pwm",
.id = 1,
},
{
.name = "abx500-temp",
},
{
.name = "pinctrl-ab9540",
.of_compatible = "stericsson,ab9540-gpio",
},
{
.name = "ab9540-usb",
},
{
.name = "ab9540-codec",
},
{
.name = "ab-iddet",
},
};
/* Device list for ab8505 */
static const struct mfd_cell ab8505_devs[] = {
#ifdef CONFIG_DEBUG_FS
{
.name = "ab8500-debug",
},
#endif
{
.name = "ab8500-sysctrl",
},
{
.name = "ab8500-regulator",
},
{
.name = "abx500-clk",
.of_compatible = "stericsson,abx500-clk",
},
{
.name = "ab8500-gpadc",
.of_compatible = "stericsson,ab8500-gpadc",
},
{
.name = "ab8500-rtc",
},
{
.name = "ab8500-acc-det",
},
{
.name = "ab8500-poweron-key",
},
{
.name = "ab8500-pwm",
.id = 1,
},
{
.name = "pinctrl-ab8505",
},
{
.name = "ab8500-usb",
},
{
.name = "ab8500-codec",
},
{
.name = "ab-iddet",
},
};
static const struct mfd_cell ab8540_devs[] = {
#ifdef CONFIG_DEBUG_FS
{
.name = "ab8500-debug",
},
#endif
{
.name = "ab8500-sysctrl",
},
{
.name = "ab8500-ext-regulator",
},
{
.name = "ab8500-regulator",
},
{
.name = "abx500-clk",
.of_compatible = "stericsson,abx500-clk",
},
{
.name = "ab8500-gpadc",
.of_compatible = "stericsson,ab8500-gpadc",
},
{
.name = "ab8500-acc-det",
},
{
.name = "ab8500-poweron-key",
},
{
.name = "ab8500-pwm",
.id = 1,
},
{
.name = "abx500-temp",
},
{
.name = "pinctrl-ab8540",
},
{
.name = "ab8540-usb",
},
{
.name = "ab8540-codec",
},
{
.name = "ab-iddet",
},
};
static const struct mfd_cell ab8540_cut1_devs[] = {
{
.name = "ab8500-rtc",
.of_compatible = "stericsson,ab8500-rtc",
},
};
static const struct mfd_cell ab8540_cut2_devs[] = {
{
.name = "ab8540-rtc",
.of_compatible = "stericsson,ab8540-rtc",
},
};
static ssize_t show_chip_id(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
}
/*
* ab8500 has switched off due to (SWITCH_OFF_STATUS):
* 0x01 Swoff bit programming
* 0x02 Thermal protection activation
* 0x04 Vbat lower then BattOk falling threshold
* 0x08 Watchdog expired
* 0x10 Non presence of 32kHz clock
* 0x20 Battery level lower than power on reset threshold
* 0x40 Power on key 1 pressed longer than 10 seconds
* 0x80 DB8500 thermal shutdown
*/
static ssize_t show_switch_off_status(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u8 value;
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_RTC,
AB8500_SWITCH_OFF_STATUS, &value);
if (ret < 0)
return ret;
return sprintf(buf, "%#x\n", value);
}
/* use mask and set to override the register turn_on_stat value */
void ab8500_override_turn_on_stat(u8 mask, u8 set)
{
spin_lock(&on_stat_lock);
turn_on_stat_mask = mask;
turn_on_stat_set = set;
spin_unlock(&on_stat_lock);
}
/*
* ab8500 has turned on due to (TURN_ON_STATUS):
* 0x01 PORnVbat
* 0x02 PonKey1dbF
* 0x04 PonKey2dbF
* 0x08 RTCAlarm
* 0x10 MainChDet
* 0x20 VbusDet
* 0x40 UsbIDDetect
* 0x80 Reserved
*/
static ssize_t show_turn_on_status(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u8 value;
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
AB8500_TURN_ON_STATUS, &value);
if (ret < 0)
return ret;
/*
* In L9540, turn_on_status register is not updated correctly if
* the device is rebooted with AC/USB charger connected. Due to
* this, the device boots android instead of entering into charge
* only mode. Read the AC/USB status register to detect the charger
* presence and update the turn on status manually.
*/
if (is_ab9540(ab8500)) {
spin_lock(&on_stat_lock);
value = (value & turn_on_stat_mask) | turn_on_stat_set;
spin_unlock(&on_stat_lock);
}
return sprintf(buf, "%#x\n", value);
}
static ssize_t show_turn_on_status_2(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u8 value;
struct ab8500 *ab8500;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
AB8505_TURN_ON_STATUS_2, &value);
if (ret < 0)
return ret;
return sprintf(buf, "%#x\n", (value & 0x1));
}
static ssize_t show_ab9540_dbbrstn(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ab8500 *ab8500;
int ret;
u8 value;
ab8500 = dev_get_drvdata(dev);
ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
AB9540_MODEM_CTRL2_REG, &value);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n",
(value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
}
static ssize_t store_ab9540_dbbrstn(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct ab8500 *ab8500;
int ret = count;
int err;
u8 bitvalues;
ab8500 = dev_get_drvdata(dev);
if (count > 0) {
switch (buf[0]) {
case '0':
bitvalues = 0;
break;
case '1':
bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
break;
default:
goto exit;
}
err = mask_and_set_register_interruptible(ab8500,
AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
if (err)
dev_info(ab8500->dev,
"Failed to set DBBRSTN %c, err %#x\n",
buf[0], err);
}
exit:
return ret;
}
static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL);
static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
show_ab9540_dbbrstn, store_ab9540_dbbrstn);
static struct attribute *ab8500_sysfs_entries[] = {
&dev_attr_chip_id.attr,
&dev_attr_switch_off_status.attr,
&dev_attr_turn_on_status.attr,
NULL,
};
static struct attribute *ab8505_sysfs_entries[] = {
&dev_attr_turn_on_status_2.attr,
NULL,
};
static struct attribute *ab9540_sysfs_entries[] = {
&dev_attr_chip_id.attr,
&dev_attr_switch_off_status.attr,
&dev_attr_turn_on_status.attr,
&dev_attr_dbbrstn.attr,
NULL,
};
static const struct attribute_group ab8500_attr_group = {
.attrs = ab8500_sysfs_entries,
};
static const struct attribute_group ab8505_attr_group = {
.attrs = ab8505_sysfs_entries,
};
static const struct attribute_group ab9540_attr_group = {
.attrs = ab9540_sysfs_entries,
};
static int ab8500_probe(struct platform_device *pdev)
{
static const char * const switch_off_status[] = {
"Swoff bit programming",
"Thermal protection activation",
"Vbat lower then BattOk falling threshold",
"Watchdog expired",
"Non presence of 32kHz clock",
"Battery level lower than power on reset threshold",
"Power on key 1 pressed longer than 10 seconds",
"DB8500 thermal shutdown"};
static const char * const turn_on_status[] = {
"Battery rising (Vbat)",
"Power On Key 1 dbF",
"Power On Key 2 dbF",
"RTC Alarm",
"Main Charger Detect",
"Vbus Detect (USB)",
"USB ID Detect",
"UART Factory Mode Detect"};
const struct platform_device_id *platid = platform_get_device_id(pdev);
enum ab8500_version version = AB8500_VERSION_UNDEFINED;
struct device_node *np = pdev->dev.of_node;
struct ab8500 *ab8500;
struct resource *resource;
int ret;
int i;
u8 value;
ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
if (!ab8500)
return -ENOMEM;
ab8500->dev = &pdev->dev;
resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!resource) {
dev_err(&pdev->dev, "no IRQ resource\n");
return -ENODEV;
}
ab8500->irq = resource->start;
ab8500->read = ab8500_prcmu_read;
ab8500->write = ab8500_prcmu_write;
ab8500->write_masked = ab8500_prcmu_write_masked;
mutex_init(&ab8500->lock);
mutex_init(&ab8500->irq_lock);
atomic_set(&ab8500->transfer_ongoing, 0);
platform_set_drvdata(pdev, ab8500);
if (platid)
version = platid->driver_data;
if (version != AB8500_VERSION_UNDEFINED)
ab8500->version = version;
else {
ret = get_register_interruptible(ab8500, AB8500_MISC,
AB8500_IC_NAME_REG, &value);
if (ret < 0) {
dev_err(&pdev->dev, "could not probe HW\n");
return ret;
}
ab8500->version = value;
}
ret = get_register_interruptible(ab8500, AB8500_MISC,
AB8500_REV_REG, &value);
if (ret < 0)
return ret;
ab8500->chip_id = value;
dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
ab8500_version_str[ab8500->version],
ab8500->chip_id >> 4,
ab8500->chip_id & 0x0F);
/* Configure AB8540 */
if (is_ab8540(ab8500)) {
ab8500->mask_size = AB8540_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab8540_irq_regoffset;
ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
} /* Configure AB8500 or AB9540 IRQ */
else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
ab8500->mask_size = AB9540_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab9540_irq_regoffset;
ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
} else {
ab8500->mask_size = AB8500_NUM_IRQ_REGS;
ab8500->irq_reg_offset = ab8500_irq_regoffset;
ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
}
ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
GFP_KERNEL);
if (!ab8500->mask)
return -ENOMEM;
ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
GFP_KERNEL);
if (!ab8500->oldmask)
return -ENOMEM;
/*
* ab8500 has switched off due to (SWITCH_OFF_STATUS):
* 0x01 Swoff bit programming
* 0x02 Thermal protection activation
* 0x04 Vbat lower then BattOk falling threshold
* 0x08 Watchdog expired
* 0x10 Non presence of 32kHz clock
* 0x20 Battery level lower than power on reset threshold
* 0x40 Power on key 1 pressed longer than 10 seconds
* 0x80 DB8500 thermal shutdown
*/
ret = get_register_interruptible(ab8500, AB8500_RTC,
AB8500_SWITCH_OFF_STATUS, &value);
if (ret < 0)
return ret;
dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
if (value) {
for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
if (value & 1)
pr_cont(" \"%s\"", switch_off_status[i]);
value = value >> 1;
}
pr_cont("\n");
} else {
pr_cont(" None\n");
}
ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
AB8500_TURN_ON_STATUS, &value);
if (ret < 0)
return ret;
dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
if (value) {
for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
if (value & 1)
pr_cont("\"%s\" ", turn_on_status[i]);
value = value >> 1;
}
pr_cont("\n");
} else {
pr_cont("None\n");
}
if (is_ab9540(ab8500)) {
ret = get_register_interruptible(ab8500, AB8500_CHARGER,
AB8500_CH_USBCH_STAT1_REG, &value);
if (ret < 0)
return ret;
if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
AB8500_VBUS_DET);
}
/* Clear and mask all interrupts */
for (i = 0; i < ab8500->mask_size; i++) {
/*
* Interrupt register 12 doesn't exist prior to AB8500 version
* 2.0
*/
if (ab8500->irq_reg_offset[i] == 11 &&
is_ab8500_1p1_or_earlier(ab8500))
continue;
if (ab8500->irq_reg_offset[i] < 0)
continue;
get_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
&value);
set_register_interruptible(ab8500, AB8500_INTERRUPT,
AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
}
ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
if (ret)
return ret;
for (i = 0; i < ab8500->mask_size; i++)
ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
ret = ab8500_irq_init(ab8500, np);
if (ret)
return ret;
ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
ab8500_hierarchical_irq,
IRQF_ONESHOT | IRQF_NO_SUSPEND,
"ab8500", ab8500);
if (ret)
return ret;
if (is_ab9540(ab8500))
ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
ARRAY_SIZE(ab9540_devs), NULL,
0, ab8500->domain);
else if (is_ab8540(ab8500)) {
ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
ARRAY_SIZE(ab8540_devs), NULL,
0, ab8500->domain);
if (ret)
return ret;
if (is_ab8540_1p2_or_earlier(ab8500))
ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
ARRAY_SIZE(ab8540_cut1_devs), NULL,
0, ab8500->domain);
else /* ab8540 >= cut2 */
ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
ARRAY_SIZE(ab8540_cut2_devs), NULL,
0, ab8500->domain);
} else if (is_ab8505(ab8500))
ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
ARRAY_SIZE(ab8505_devs), NULL,
0, ab8500->domain);
else
ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
ARRAY_SIZE(ab8500_devs), NULL,
0, ab8500->domain);
if (ret)
return ret;
if (!no_bm) {
/* Add battery management devices */
ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
ARRAY_SIZE(ab8500_bm_devs), NULL,
0, ab8500->domain);
if (ret)
dev_err(ab8500->dev, "error adding bm devices\n");
}
if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
ret = sysfs_create_group(&ab8500->dev->kobj,
&ab9540_attr_group);
else
ret = sysfs_create_group(&ab8500->dev->kobj,
&ab8500_attr_group);
if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
ab8500->chip_id >= AB8500_CUT2P0)
ret = sysfs_create_group(&ab8500->dev->kobj,
&ab8505_attr_group);
if (ret)
dev_err(ab8500->dev, "error creating sysfs entries\n");
return ret;
}
static const struct platform_device_id ab8500_id[] = {
{ "ab8500-core", AB8500_VERSION_AB8500 },
{ "ab8505-i2c", AB8500_VERSION_AB8505 },
{ "ab9540-i2c", AB8500_VERSION_AB9540 },
{ "ab8540-i2c", AB8500_VERSION_AB8540 },
{ }
};
static struct platform_driver ab8500_core_driver = {
.driver = {
.name = "ab8500-core",
.suppress_bind_attrs = true,
},
.probe = ab8500_probe,
.id_table = ab8500_id,
};
static int __init ab8500_core_init(void)
{
return platform_driver_register(&ab8500_core_driver);
}
core_initcall(ab8500_core_init);
Reference in New Issue View Git Blame Copy Permalink