diff options
Diffstat (limited to 'drivers/mfd/pm8xxx-irq.c')
| -rw-r--r-- | drivers/mfd/pm8xxx-irq.c | 371 |
1 files changed, 0 insertions, 371 deletions
diff --git a/drivers/mfd/pm8xxx-irq.c b/drivers/mfd/pm8xxx-irq.c deleted file mode 100644 index 1360e20adf1..00000000000 --- a/drivers/mfd/pm8xxx-irq.c +++ /dev/null @@ -1,371 +0,0 @@ -/* - * 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/err.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/kernel.h> -#include <linux/mfd/pm8xxx/core.h> -#include <linux/mfd/pm8xxx/irq.h> -#include <linux/platform_device.h> -#include <linux/slab.h> - -/* PMIC8xxx IRQ */ - -#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) - -struct pm_irq_chip { - struct device *dev; - spinlock_t pm_irq_lock; - unsigned int devirq; - unsigned int irq_base; - unsigned int num_irqs; - unsigned int num_blocks; - unsigned int num_masters; - u8 config[0]; -}; - -static int pm8xxx_read_root_irq(const struct pm_irq_chip *chip, u8 *rp) -{ - return pm8xxx_readb(chip->dev, SSBI_REG_ADDR_IRQ_ROOT, rp); -} - -static int pm8xxx_read_master_irq(const struct pm_irq_chip *chip, u8 m, u8 *bp) -{ - return pm8xxx_readb(chip->dev, - SSBI_REG_ADDR_IRQ_M_STATUS1 + m, bp); -} - -static int pm8xxx_read_block_irq(struct pm_irq_chip *chip, u8 bp, u8 *ip) -{ - int rc; - - spin_lock(&chip->pm_irq_lock); - rc = pm8xxx_writeb(chip->dev, SSBI_REG_ADDR_IRQ_BLK_SEL, bp); - if (rc) { - pr_err("Failed Selecting Block %d rc=%d\n", bp, rc); - goto bail; - } - - rc = pm8xxx_readb(chip->dev, 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, u8 bp, u8 cp) -{ - int rc; - - spin_lock(&chip->pm_irq_lock); - rc = pm8xxx_writeb(chip->dev, 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 = pm8xxx_writeb(chip->dev, 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; - u8 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 = pmirq + chip->irq_base; - generic_handle_irq(irq); - } - } - return 0; -} - -static int pm8xxx_irq_master_handler(struct pm_irq_chip *chip, int master) -{ - u8 blockbits; - int block_number, i, ret = 0; - - ret = pm8xxx_read_master_irq(chip, 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); - u8 root; - int i, ret, masters = 0; - - ret = pm8xxx_read_root_irq(chip, &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); - - irq_chip->irq_ack(&desc->irq_data); -} - -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 = d->irq - chip->irq_base; - int master, irq_bit; - u8 block, config; - - block = pmirq / 8; - master = block / 8; - irq_bit = 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 = d->irq - chip->irq_base; - int master, irq_bit; - u8 block, config; - - block = pmirq / 8; - master = block / 8; - irq_bit = 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 = d->irq - chip->irq_base; - int master, irq_bit; - u8 block, config; - - block = pmirq / 8; - master = block / 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 int pm8xxx_irq_set_wake(struct irq_data *d, unsigned int on) -{ - return 0; -} - -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, - .irq_set_wake = pm8xxx_irq_set_wake, - .flags = IRQCHIP_MASK_ON_SUSPEND, -}; - -/** - * pm8xxx_get_irq_stat - get the status of the irq line - * @chip: pointer to identify a pmic irq controller - * @irq: the irq number - * - * The pm8xxx gpio and mpp rely on the interrupt block to read - * the values on their pins. This function is to facilitate reading - * the status of a gpio or an mpp line. The caller has to convert the - * gpio number to irq number. - * - * RETURNS: - * an int indicating the value read on that line - */ -int pm8xxx_get_irq_stat(struct pm_irq_chip *chip, int irq) -{ - int pmirq, rc; - u8 block, bits, bit; - unsigned long flags; - - if (chip == NULL || irq < chip->irq_base || - irq >= chip->irq_base + chip->num_irqs) - return -EINVAL; - - pmirq = irq - chip->irq_base; - - block = pmirq / 8; - bit = pmirq % 8; - - spin_lock_irqsave(&chip->pm_irq_lock, flags); - - rc = pm8xxx_writeb(chip->dev, SSBI_REG_ADDR_IRQ_BLK_SEL, block); - if (rc) { - pr_err("Failed Selecting block irq=%d pmirq=%d blk=%d rc=%d\n", - irq, pmirq, block, rc); - goto bail_out; - } - - rc = pm8xxx_readb(chip->dev, SSBI_REG_ADDR_IRQ_RT_STATUS, &bits); - if (rc) { - pr_err("Failed Configuring irq=%d pmirq=%d blk=%d rc=%d\n", - irq, pmirq, block, rc); - goto bail_out; - } - - rc = (bits & (1 << bit)) ? 1 : 0; - -bail_out: - spin_unlock_irqrestore(&chip->pm_irq_lock, flags); - - return rc; -} -EXPORT_SYMBOL_GPL(pm8xxx_get_irq_stat); - -struct pm_irq_chip * pm8xxx_irq_init(struct device *dev, - const struct pm8xxx_irq_platform_data *pdata) -{ - struct pm_irq_chip *chip; - int devirq, rc; - unsigned int pmirq; - - if (!pdata) { - pr_err("No platform data\n"); - return ERR_PTR(-EINVAL); - } - - devirq = pdata->devirq; - if (devirq < 0) { - pr_err("missing devirq\n"); - rc = devirq; - return ERR_PTR(-EINVAL); - } - - chip = kzalloc(sizeof(struct pm_irq_chip) - + sizeof(u8) * pdata->irq_cdata.nirqs, GFP_KERNEL); - if (!chip) { - pr_err("Cannot alloc pm_irq_chip struct\n"); - return ERR_PTR(-EINVAL); - } - - chip->dev = dev; - chip->devirq = devirq; - chip->irq_base = pdata->irq_base; - chip->num_irqs = pdata->irq_cdata.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); - - for (pmirq = 0; pmirq < chip->num_irqs; pmirq++) { - irq_set_chip_and_handler(chip->irq_base + pmirq, - &pm8xxx_irq_chip, - handle_level_irq); - irq_set_chip_data(chip->irq_base + pmirq, chip); -#ifdef CONFIG_ARM - set_irq_flags(chip->irq_base + pmirq, IRQF_VALID); -#else - irq_set_noprobe(chip->irq_base + pmirq); -#endif - } - - irq_set_irq_type(devirq, pdata->irq_trigger_flag); - irq_set_handler_data(devirq, chip); - irq_set_chained_handler(devirq, pm8xxx_irq_handler); - set_irq_wake(devirq, 1); - - return chip; -} - -int pm8xxx_irq_exit(struct pm_irq_chip *chip) -{ - irq_set_chained_handler(chip->devirq, NULL); - kfree(chip); - return 0; -} |