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author | Viresh Kumar <viresh.kumar@linaro.org> | 2012-11-12 22:56:03 +0530 |
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committer | Viresh Kumar <viresh.kumar@linaro.org> | 2012-11-26 16:55:33 +0530 |
commit | df1590d9ae5e37e07e7cf91107e4c2c946ce8bf4 (patch) | |
tree | 7e17333920f4ab9986f3f40e881b4bc890a91724 /arch/arm/plat-spear/shirq.c | |
parent | e2eb69183ec4156eb814e67672e492bf902bbcd2 (diff) | |
download | op-kernel-dev-df1590d9ae5e37e07e7cf91107e4c2c946ce8bf4.zip op-kernel-dev-df1590d9ae5e37e07e7cf91107e4c2c946ce8bf4.tar.gz |
ARM: SPEAr3xx: Shirq: Move shirq controller out of plat/
This patch moves shirq interrupt controllers driver and header file out of
plat-spear directory. It is moved to drivers/irqchip/ directory.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'arch/arm/plat-spear/shirq.c')
-rw-r--r-- | arch/arm/plat-spear/shirq.c | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/arch/arm/plat-spear/shirq.c b/arch/arm/plat-spear/shirq.c deleted file mode 100644 index 955c724..0000000 --- a/arch/arm/plat-spear/shirq.c +++ /dev/null @@ -1,315 +0,0 @@ -/* - * arch/arm/plat-spear/shirq.c - * - * SPEAr platform shared irq layer source file - * - * Copyright (C) 2009 ST Microelectronics - * Viresh Kumar <viresh.linux@gmail.com> - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/err.h> -#include <linux/export.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/spinlock.h> -#include <plat/shirq.h> - -static DEFINE_SPINLOCK(lock); - -/* spear300 shared irq registers offsets and masks */ -#define SPEAR300_INT_ENB_MASK_REG 0x54 -#define SPEAR300_INT_STS_MASK_REG 0x58 - -static struct spear_shirq spear300_shirq_ras1 = { - .irq_nr = 9, - .irq_bit_off = 0, - .regs = { - .enb_reg = SPEAR300_INT_ENB_MASK_REG, - .status_reg = SPEAR300_INT_STS_MASK_REG, - .clear_reg = -1, - }, -}; - -static struct spear_shirq *spear300_shirq_blocks[] = { - &spear300_shirq_ras1, -}; - -/* spear310 shared irq registers offsets and masks */ -#define SPEAR310_INT_STS_MASK_REG 0x04 - -static struct spear_shirq spear310_shirq_ras1 = { - .irq_nr = 8, - .irq_bit_off = 0, - .regs = { - .enb_reg = -1, - .status_reg = SPEAR310_INT_STS_MASK_REG, - .clear_reg = -1, - }, -}; - -static struct spear_shirq spear310_shirq_ras2 = { - .irq_nr = 5, - .irq_bit_off = 8, - .regs = { - .enb_reg = -1, - .status_reg = SPEAR310_INT_STS_MASK_REG, - .clear_reg = -1, - }, -}; - -static struct spear_shirq spear310_shirq_ras3 = { - .irq_nr = 1, - .irq_bit_off = 13, - .regs = { - .enb_reg = -1, - .status_reg = SPEAR310_INT_STS_MASK_REG, - .clear_reg = -1, - }, -}; - -static struct spear_shirq spear310_shirq_intrcomm_ras = { - .irq_nr = 3, - .irq_bit_off = 14, - .regs = { - .enb_reg = -1, - .status_reg = SPEAR310_INT_STS_MASK_REG, - .clear_reg = -1, - }, -}; - -static struct spear_shirq *spear310_shirq_blocks[] = { - &spear310_shirq_ras1, - &spear310_shirq_ras2, - &spear310_shirq_ras3, - &spear310_shirq_intrcomm_ras, -}; - -/* spear320 shared irq registers offsets and masks */ -#define SPEAR320_INT_STS_MASK_REG 0x04 -#define SPEAR320_INT_CLR_MASK_REG 0x04 -#define SPEAR320_INT_ENB_MASK_REG 0x08 - -static struct spear_shirq spear320_shirq_ras1 = { - .irq_nr = 3, - .irq_bit_off = 7, - .regs = { - .enb_reg = -1, - .status_reg = SPEAR320_INT_STS_MASK_REG, - .clear_reg = SPEAR320_INT_CLR_MASK_REG, - .reset_to_clear = 1, - }, -}; - -static struct spear_shirq spear320_shirq_ras2 = { - .irq_nr = 1, - .irq_bit_off = 10, - .regs = { - .enb_reg = -1, - .status_reg = SPEAR320_INT_STS_MASK_REG, - .clear_reg = SPEAR320_INT_CLR_MASK_REG, - .reset_to_clear = 1, - }, -}; - -static struct spear_shirq spear320_shirq_ras3 = { - .irq_nr = 3, - .irq_bit_off = 0, - .invalid_irq = 1, - .regs = { - .enb_reg = SPEAR320_INT_ENB_MASK_REG, - .reset_to_enb = 1, - .status_reg = SPEAR320_INT_STS_MASK_REG, - .clear_reg = SPEAR320_INT_CLR_MASK_REG, - .reset_to_clear = 1, - }, -}; - -static struct spear_shirq spear320_shirq_intrcomm_ras = { - .irq_nr = 11, - .irq_bit_off = 11, - .regs = { - .enb_reg = -1, - .status_reg = SPEAR320_INT_STS_MASK_REG, - .clear_reg = SPEAR320_INT_CLR_MASK_REG, - .reset_to_clear = 1, - }, -}; - -static struct spear_shirq *spear320_shirq_blocks[] = { - &spear320_shirq_ras3, - &spear320_shirq_ras1, - &spear320_shirq_ras2, - &spear320_shirq_intrcomm_ras, -}; - -static void shirq_irq_mask_unmask(struct irq_data *d, bool mask) -{ - struct spear_shirq *shirq = irq_data_get_irq_chip_data(d); - u32 val, offset = d->irq - shirq->irq_base; - unsigned long flags; - - if (shirq->regs.enb_reg == -1) - return; - - spin_lock_irqsave(&lock, flags); - val = readl(shirq->base + shirq->regs.enb_reg); - - if (mask ^ shirq->regs.reset_to_enb) - val &= ~(0x1 << shirq->irq_bit_off << offset); - else - val |= 0x1 << shirq->irq_bit_off << offset; - - writel(val, shirq->base + shirq->regs.enb_reg); - spin_unlock_irqrestore(&lock, flags); - -} - -static void shirq_irq_mask(struct irq_data *d) -{ - shirq_irq_mask_unmask(d, 1); -} - -static void shirq_irq_unmask(struct irq_data *d) -{ - shirq_irq_mask_unmask(d, 0); -} - -static struct irq_chip shirq_chip = { - .name = "spear-shirq", - .irq_ack = shirq_irq_mask, - .irq_mask = shirq_irq_mask, - .irq_unmask = shirq_irq_unmask, -}; - -static void shirq_handler(unsigned irq, struct irq_desc *desc) -{ - u32 i, j, val, mask, tmp; - struct irq_chip *chip; - struct spear_shirq *shirq = irq_get_handler_data(irq); - - chip = irq_get_chip(irq); - chip->irq_ack(&desc->irq_data); - - mask = ((0x1 << shirq->irq_nr) - 1) << shirq->irq_bit_off; - while ((val = readl(shirq->base + shirq->regs.status_reg) & - mask)) { - - val >>= shirq->irq_bit_off; - for (i = 0, j = 1; i < shirq->irq_nr; i++, j <<= 1) { - - if (!(j & val)) - continue; - - generic_handle_irq(shirq->irq_base + i); - - /* clear interrupt */ - if (shirq->regs.clear_reg == -1) - continue; - - tmp = readl(shirq->base + shirq->regs.clear_reg); - if (shirq->regs.reset_to_clear) - tmp &= ~(j << shirq->irq_bit_off); - else - tmp |= (j << shirq->irq_bit_off); - writel(tmp, shirq->base + shirq->regs.clear_reg); - } - } - chip->irq_unmask(&desc->irq_data); -} - -static void __init spear_shirq_register(struct spear_shirq *shirq) -{ - int i; - - if (shirq->invalid_irq) - return; - - irq_set_chained_handler(shirq->irq, shirq_handler); - for (i = 0; i < shirq->irq_nr; i++) { - irq_set_chip_and_handler(shirq->irq_base + i, - &shirq_chip, handle_simple_irq); - set_irq_flags(shirq->irq_base + i, IRQF_VALID); - irq_set_chip_data(shirq->irq_base + i, shirq); - } - - irq_set_handler_data(shirq->irq, shirq); -} - -static int __init shirq_init(struct spear_shirq **shirq_blocks, int block_nr, - struct device_node *np) -{ - int i, irq_base, hwirq = 0, irq_nr = 0; - static struct irq_domain *shirq_domain; - void __iomem *base; - - base = of_iomap(np, 0); - if (!base) { - pr_err("%s: failed to map shirq registers\n", __func__); - return -ENXIO; - } - - for (i = 0; i < block_nr; i++) - irq_nr += shirq_blocks[i]->irq_nr; - - irq_base = irq_alloc_descs(-1, 0, irq_nr, 0); - if (IS_ERR_VALUE(irq_base)) { - pr_err("%s: irq desc alloc failed\n", __func__); - goto err_unmap; - } - - shirq_domain = irq_domain_add_legacy(np, irq_nr, irq_base, 0, - &irq_domain_simple_ops, NULL); - if (WARN_ON(!shirq_domain)) { - pr_warn("%s: irq domain init failed\n", __func__); - goto err_free_desc; - } - - for (i = 0; i < block_nr; i++) { - shirq_blocks[i]->base = base; - shirq_blocks[i]->irq_base = irq_find_mapping(shirq_domain, - hwirq); - shirq_blocks[i]->irq = irq_of_parse_and_map(np, i); - - spear_shirq_register(shirq_blocks[i]); - hwirq += shirq_blocks[i]->irq_nr; - } - - return 0; - -err_free_desc: - irq_free_descs(irq_base, irq_nr); -err_unmap: - iounmap(base); - return -ENXIO; -} - -int __init spear300_shirq_of_init(struct device_node *np, - struct device_node *parent) -{ - return shirq_init(spear300_shirq_blocks, - ARRAY_SIZE(spear300_shirq_blocks), np); -} - -int __init spear310_shirq_of_init(struct device_node *np, - struct device_node *parent) -{ - return shirq_init(spear310_shirq_blocks, - ARRAY_SIZE(spear310_shirq_blocks), np); -} - -int __init spear320_shirq_of_init(struct device_node *np, - struct device_node *parent) -{ - return shirq_init(spear320_shirq_blocks, - ARRAY_SIZE(spear320_shirq_blocks), np); -} |