You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
397 lines
10 KiB
397 lines
10 KiB
/* |
|
* Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
|
* |
|
* This program is free software; you can redistribute it and/or modify |
|
* it under the terms of the GNU General Public License version 2 and |
|
* only version 2 as published by the Free Software Foundation. |
|
* |
|
* This program is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
* GNU General Public License for more details. |
|
*/ |
|
|
|
#define pr_fmt(fmt) "%s: " fmt, __func__ |
|
|
|
#include <linux/kernel.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/irqchip/chained_irq.h> |
|
#include <linux/irq.h> |
|
#include <linux/irqdomain.h> |
|
#include <linux/module.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/slab.h> |
|
#include <linux/err.h> |
|
#include <linux/ssbi.h> |
|
#include <linux/regmap.h> |
|
#include <linux/of_platform.h> |
|
#include <linux/mfd/core.h> |
|
|
|
#define SSBI_REG_ADDR_IRQ_BASE 0x1BB |
|
|
|
#define SSBI_REG_ADDR_IRQ_ROOT (SSBI_REG_ADDR_IRQ_BASE + 0) |
|
#define SSBI_REG_ADDR_IRQ_M_STATUS1 (SSBI_REG_ADDR_IRQ_BASE + 1) |
|
#define SSBI_REG_ADDR_IRQ_M_STATUS2 (SSBI_REG_ADDR_IRQ_BASE + 2) |
|
#define SSBI_REG_ADDR_IRQ_M_STATUS3 (SSBI_REG_ADDR_IRQ_BASE + 3) |
|
#define SSBI_REG_ADDR_IRQ_M_STATUS4 (SSBI_REG_ADDR_IRQ_BASE + 4) |
|
#define SSBI_REG_ADDR_IRQ_BLK_SEL (SSBI_REG_ADDR_IRQ_BASE + 5) |
|
#define SSBI_REG_ADDR_IRQ_IT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 6) |
|
#define SSBI_REG_ADDR_IRQ_CONFIG (SSBI_REG_ADDR_IRQ_BASE + 7) |
|
#define SSBI_REG_ADDR_IRQ_RT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 8) |
|
|
|
#define PM_IRQF_LVL_SEL 0x01 /* level select */ |
|
#define PM_IRQF_MASK_FE 0x02 /* mask falling edge */ |
|
#define PM_IRQF_MASK_RE 0x04 /* mask rising edge */ |
|
#define PM_IRQF_CLR 0x08 /* clear interrupt */ |
|
#define PM_IRQF_BITS_MASK 0x70 |
|
#define PM_IRQF_BITS_SHIFT 4 |
|
#define PM_IRQF_WRITE 0x80 |
|
|
|
#define PM_IRQF_MASK_ALL (PM_IRQF_MASK_FE | \ |
|
PM_IRQF_MASK_RE) |
|
|
|
#define REG_HWREV 0x002 /* PMIC4 revision */ |
|
#define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */ |
|
|
|
#define PM8921_NR_IRQS 256 |
|
|
|
struct pm_irq_chip { |
|
struct regmap *regmap; |
|
spinlock_t pm_irq_lock; |
|
struct irq_domain *irqdomain; |
|
unsigned int num_irqs; |
|
unsigned int num_blocks; |
|
unsigned int num_masters; |
|
u8 config[0]; |
|
}; |
|
|
|
static int pm8xxx_read_block_irq(struct pm_irq_chip *chip, unsigned int bp, |
|
unsigned int *ip) |
|
{ |
|
int rc; |
|
|
|
spin_lock(&chip->pm_irq_lock); |
|
rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp); |
|
if (rc) { |
|
pr_err("Failed Selecting Block %d rc=%d\n", bp, rc); |
|
goto bail; |
|
} |
|
|
|
rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_IT_STATUS, ip); |
|
if (rc) |
|
pr_err("Failed Reading Status rc=%d\n", rc); |
|
bail: |
|
spin_unlock(&chip->pm_irq_lock); |
|
return rc; |
|
} |
|
|
|
static int |
|
pm8xxx_config_irq(struct pm_irq_chip *chip, unsigned int bp, unsigned int cp) |
|
{ |
|
int rc; |
|
|
|
spin_lock(&chip->pm_irq_lock); |
|
rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, bp); |
|
if (rc) { |
|
pr_err("Failed Selecting Block %d rc=%d\n", bp, rc); |
|
goto bail; |
|
} |
|
|
|
cp |= PM_IRQF_WRITE; |
|
rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_CONFIG, cp); |
|
if (rc) |
|
pr_err("Failed Configuring IRQ rc=%d\n", rc); |
|
bail: |
|
spin_unlock(&chip->pm_irq_lock); |
|
return rc; |
|
} |
|
|
|
static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip, int block) |
|
{ |
|
int pmirq, irq, i, ret = 0; |
|
unsigned int bits; |
|
|
|
ret = pm8xxx_read_block_irq(chip, block, &bits); |
|
if (ret) { |
|
pr_err("Failed reading %d block ret=%d", block, ret); |
|
return ret; |
|
} |
|
if (!bits) { |
|
pr_err("block bit set in master but no irqs: %d", block); |
|
return 0; |
|
} |
|
|
|
/* Check IRQ bits */ |
|
for (i = 0; i < 8; i++) { |
|
if (bits & (1 << i)) { |
|
pmirq = block * 8 + i; |
|
irq = irq_find_mapping(chip->irqdomain, pmirq); |
|
generic_handle_irq(irq); |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int pm8xxx_irq_master_handler(struct pm_irq_chip *chip, int master) |
|
{ |
|
unsigned int blockbits; |
|
int block_number, i, ret = 0; |
|
|
|
ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_M_STATUS1 + master, |
|
&blockbits); |
|
if (ret) { |
|
pr_err("Failed to read master %d ret=%d\n", master, ret); |
|
return ret; |
|
} |
|
if (!blockbits) { |
|
pr_err("master bit set in root but no blocks: %d", master); |
|
return 0; |
|
} |
|
|
|
for (i = 0; i < 8; i++) |
|
if (blockbits & (1 << i)) { |
|
block_number = master * 8 + i; /* block # */ |
|
ret |= pm8xxx_irq_block_handler(chip, block_number); |
|
} |
|
return ret; |
|
} |
|
|
|
static void pm8xxx_irq_handler(unsigned int irq, struct irq_desc *desc) |
|
{ |
|
struct pm_irq_chip *chip = irq_desc_get_handler_data(desc); |
|
struct irq_chip *irq_chip = irq_desc_get_chip(desc); |
|
unsigned int root; |
|
int i, ret, masters = 0; |
|
|
|
chained_irq_enter(irq_chip, desc); |
|
|
|
ret = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_ROOT, &root); |
|
if (ret) { |
|
pr_err("Can't read root status ret=%d\n", ret); |
|
return; |
|
} |
|
|
|
/* on pm8xxx series masters start from bit 1 of the root */ |
|
masters = root >> 1; |
|
|
|
/* Read allowed masters for blocks. */ |
|
for (i = 0; i < chip->num_masters; i++) |
|
if (masters & (1 << i)) |
|
pm8xxx_irq_master_handler(chip, i); |
|
|
|
chained_irq_exit(irq_chip, desc); |
|
} |
|
|
|
static void pm8xxx_irq_mask_ack(struct irq_data *d) |
|
{ |
|
struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); |
|
unsigned int pmirq = irqd_to_hwirq(d); |
|
u8 block, config; |
|
|
|
block = pmirq / 8; |
|
|
|
config = chip->config[pmirq] | PM_IRQF_MASK_ALL | PM_IRQF_CLR; |
|
pm8xxx_config_irq(chip, block, config); |
|
} |
|
|
|
static void pm8xxx_irq_unmask(struct irq_data *d) |
|
{ |
|
struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); |
|
unsigned int pmirq = irqd_to_hwirq(d); |
|
u8 block, config; |
|
|
|
block = pmirq / 8; |
|
|
|
config = chip->config[pmirq]; |
|
pm8xxx_config_irq(chip, block, config); |
|
} |
|
|
|
static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type) |
|
{ |
|
struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); |
|
unsigned int pmirq = irqd_to_hwirq(d); |
|
int irq_bit; |
|
u8 block, config; |
|
|
|
block = pmirq / 8; |
|
irq_bit = pmirq % 8; |
|
|
|
chip->config[pmirq] = (irq_bit << PM_IRQF_BITS_SHIFT) |
|
| PM_IRQF_MASK_ALL; |
|
if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { |
|
if (flow_type & IRQF_TRIGGER_RISING) |
|
chip->config[pmirq] &= ~PM_IRQF_MASK_RE; |
|
if (flow_type & IRQF_TRIGGER_FALLING) |
|
chip->config[pmirq] &= ~PM_IRQF_MASK_FE; |
|
} else { |
|
chip->config[pmirq] |= PM_IRQF_LVL_SEL; |
|
|
|
if (flow_type & IRQF_TRIGGER_HIGH) |
|
chip->config[pmirq] &= ~PM_IRQF_MASK_RE; |
|
else |
|
chip->config[pmirq] &= ~PM_IRQF_MASK_FE; |
|
} |
|
|
|
config = chip->config[pmirq] | PM_IRQF_CLR; |
|
return pm8xxx_config_irq(chip, block, config); |
|
} |
|
|
|
static struct irq_chip pm8xxx_irq_chip = { |
|
.name = "pm8xxx", |
|
.irq_mask_ack = pm8xxx_irq_mask_ack, |
|
.irq_unmask = pm8xxx_irq_unmask, |
|
.irq_set_type = pm8xxx_irq_set_type, |
|
.flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE, |
|
}; |
|
|
|
static int pm8xxx_irq_domain_map(struct irq_domain *d, unsigned int irq, |
|
irq_hw_number_t hwirq) |
|
{ |
|
struct pm_irq_chip *chip = d->host_data; |
|
|
|
irq_set_chip_and_handler(irq, &pm8xxx_irq_chip, handle_level_irq); |
|
irq_set_chip_data(irq, chip); |
|
#ifdef CONFIG_ARM |
|
set_irq_flags(irq, IRQF_VALID); |
|
#else |
|
irq_set_noprobe(irq); |
|
#endif |
|
return 0; |
|
} |
|
|
|
static const struct irq_domain_ops pm8xxx_irq_domain_ops = { |
|
.xlate = irq_domain_xlate_twocell, |
|
.map = pm8xxx_irq_domain_map, |
|
}; |
|
|
|
static const struct regmap_config ssbi_regmap_config = { |
|
.reg_bits = 16, |
|
.val_bits = 8, |
|
.max_register = 0x3ff, |
|
.fast_io = true, |
|
.reg_read = ssbi_reg_read, |
|
.reg_write = ssbi_reg_write |
|
}; |
|
|
|
static const struct of_device_id pm8921_id_table[] = { |
|
{ .compatible = "qcom,pm8058", }, |
|
{ .compatible = "qcom,pm8921", }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, pm8921_id_table); |
|
|
|
static int pm8921_probe(struct platform_device *pdev) |
|
{ |
|
struct regmap *regmap; |
|
int irq, rc; |
|
unsigned int val; |
|
u32 rev; |
|
struct pm_irq_chip *chip; |
|
unsigned int nirqs = PM8921_NR_IRQS; |
|
|
|
irq = platform_get_irq(pdev, 0); |
|
if (irq < 0) |
|
return irq; |
|
|
|
regmap = devm_regmap_init(&pdev->dev, NULL, pdev->dev.parent, |
|
&ssbi_regmap_config); |
|
if (IS_ERR(regmap)) |
|
return PTR_ERR(regmap); |
|
|
|
/* Read PMIC chip revision */ |
|
rc = regmap_read(regmap, REG_HWREV, &val); |
|
if (rc) { |
|
pr_err("Failed to read hw rev reg %d:rc=%d\n", REG_HWREV, rc); |
|
return rc; |
|
} |
|
pr_info("PMIC revision 1: %02X\n", val); |
|
rev = val; |
|
|
|
/* Read PMIC chip revision 2 */ |
|
rc = regmap_read(regmap, REG_HWREV_2, &val); |
|
if (rc) { |
|
pr_err("Failed to read hw rev 2 reg %d:rc=%d\n", |
|
REG_HWREV_2, rc); |
|
return rc; |
|
} |
|
pr_info("PMIC revision 2: %02X\n", val); |
|
rev |= val << BITS_PER_BYTE; |
|
|
|
chip = devm_kzalloc(&pdev->dev, sizeof(*chip) + |
|
sizeof(chip->config[0]) * nirqs, |
|
GFP_KERNEL); |
|
if (!chip) |
|
return -ENOMEM; |
|
|
|
platform_set_drvdata(pdev, chip); |
|
chip->regmap = regmap; |
|
chip->num_irqs = nirqs; |
|
chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8); |
|
chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8); |
|
spin_lock_init(&chip->pm_irq_lock); |
|
|
|
chip->irqdomain = irq_domain_add_linear(pdev->dev.of_node, nirqs, |
|
&pm8xxx_irq_domain_ops, |
|
chip); |
|
if (!chip->irqdomain) |
|
return -ENODEV; |
|
|
|
irq_set_handler_data(irq, chip); |
|
irq_set_chained_handler(irq, pm8xxx_irq_handler); |
|
irq_set_irq_wake(irq, 1); |
|
|
|
rc = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); |
|
if (rc) { |
|
irq_set_chained_handler(irq, NULL); |
|
irq_set_handler_data(irq, NULL); |
|
irq_domain_remove(chip->irqdomain); |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
static int pm8921_remove_child(struct device *dev, void *unused) |
|
{ |
|
platform_device_unregister(to_platform_device(dev)); |
|
return 0; |
|
} |
|
|
|
static int pm8921_remove(struct platform_device *pdev) |
|
{ |
|
int irq = platform_get_irq(pdev, 0); |
|
struct pm_irq_chip *chip = platform_get_drvdata(pdev); |
|
|
|
device_for_each_child(&pdev->dev, NULL, pm8921_remove_child); |
|
irq_set_chained_handler(irq, NULL); |
|
irq_set_handler_data(irq, NULL); |
|
irq_domain_remove(chip->irqdomain); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver pm8921_driver = { |
|
.probe = pm8921_probe, |
|
.remove = pm8921_remove, |
|
.driver = { |
|
.name = "pm8921-core", |
|
.owner = THIS_MODULE, |
|
.of_match_table = pm8921_id_table, |
|
}, |
|
}; |
|
|
|
static int __init pm8921_init(void) |
|
{ |
|
return platform_driver_register(&pm8921_driver); |
|
} |
|
subsys_initcall(pm8921_init); |
|
|
|
static void __exit pm8921_exit(void) |
|
{ |
|
platform_driver_unregister(&pm8921_driver); |
|
} |
|
module_exit(pm8921_exit); |
|
|
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_DESCRIPTION("PMIC 8921 core driver"); |
|
MODULE_VERSION("1.0"); |
|
MODULE_ALIAS("platform:pm8921-core");
|
|
|