diff options
Diffstat (limited to 'arch/arm/mach-msm/irq-vic.c')
| -rw-r--r-- | arch/arm/mach-msm/irq-vic.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/irq-vic.c b/arch/arm/mach-msm/irq-vic.c new file mode 100644 index 000000000000..99f2c3473033 --- /dev/null +++ b/arch/arm/mach-msm/irq-vic.c @@ -0,0 +1,365 @@ +/* + * Copyright (C) 2007 Google, Inc. + * Copyright (c) 2009, Code Aurora Forum. All rights reserved. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/interrupt.h> +#include <linux/ptrace.h> +#include <linux/timer.h> +#include <linux/irq.h> +#include <linux/io.h> + +#include <asm/cacheflush.h> + +#include <mach/hardware.h> + +#include <mach/msm_iomap.h> + +#include "smd_private.h" + +enum { + IRQ_DEBUG_SLEEP_INT_TRIGGER = 1U << 0, + IRQ_DEBUG_SLEEP_INT = 1U << 1, + IRQ_DEBUG_SLEEP_ABORT = 1U << 2, + IRQ_DEBUG_SLEEP = 1U << 3, + IRQ_DEBUG_SLEEP_REQUEST = 1U << 4, +}; +static int msm_irq_debug_mask; +module_param_named(debug_mask, msm_irq_debug_mask, int, + S_IRUGO | S_IWUSR | S_IWGRP); + +#define VIC_REG(off) (MSM_VIC_BASE + (off)) +#define VIC_INT_TO_REG_ADDR(base, irq) (base + (irq / 32) * 4) +#define VIC_INT_TO_REG_INDEX(irq) ((irq >> 5) & 3) + +#define VIC_INT_SELECT0 VIC_REG(0x0000) /* 1: FIQ, 0: IRQ */ +#define VIC_INT_SELECT1 VIC_REG(0x0004) /* 1: FIQ, 0: IRQ */ +#define VIC_INT_SELECT2 VIC_REG(0x0008) /* 1: FIQ, 0: IRQ */ +#define VIC_INT_SELECT3 VIC_REG(0x000C) /* 1: FIQ, 0: IRQ */ +#define VIC_INT_EN0 VIC_REG(0x0010) +#define VIC_INT_EN1 VIC_REG(0x0014) +#define VIC_INT_EN2 VIC_REG(0x0018) +#define VIC_INT_EN3 VIC_REG(0x001C) +#define VIC_INT_ENCLEAR0 VIC_REG(0x0020) +#define VIC_INT_ENCLEAR1 VIC_REG(0x0024) +#define VIC_INT_ENCLEAR2 VIC_REG(0x0028) +#define VIC_INT_ENCLEAR3 VIC_REG(0x002C) +#define VIC_INT_ENSET0 VIC_REG(0x0030) +#define VIC_INT_ENSET1 VIC_REG(0x0034) +#define VIC_INT_ENSET2 VIC_REG(0x0038) +#define VIC_INT_ENSET3 VIC_REG(0x003C) +#define VIC_INT_TYPE0 VIC_REG(0x0040) /* 1: EDGE, 0: LEVEL */ +#define VIC_INT_TYPE1 VIC_REG(0x0044) /* 1: EDGE, 0: LEVEL */ +#define VIC_INT_TYPE2 VIC_REG(0x0048) /* 1: EDGE, 0: LEVEL */ +#define VIC_INT_TYPE3 VIC_REG(0x004C) /* 1: EDGE, 0: LEVEL */ +#define VIC_INT_POLARITY0 VIC_REG(0x0050) /* 1: NEG, 0: POS */ +#define VIC_INT_POLARITY1 VIC_REG(0x0054) /* 1: NEG, 0: POS */ +#define VIC_INT_POLARITY2 VIC_REG(0x0058) /* 1: NEG, 0: POS */ +#define VIC_INT_POLARITY3 VIC_REG(0x005C) /* 1: NEG, 0: POS */ +#define VIC_NO_PEND_VAL VIC_REG(0x0060) + +#if defined(CONFIG_ARCH_MSM_SCORPION) +#define VIC_NO_PEND_VAL_FIQ VIC_REG(0x0064) +#define VIC_INT_MASTEREN VIC_REG(0x0068) /* 1: IRQ, 2: FIQ */ +#define VIC_CONFIG VIC_REG(0x006C) /* 1: USE SC VIC */ +#else +#define VIC_INT_MASTEREN VIC_REG(0x0064) /* 1: IRQ, 2: FIQ */ +#define VIC_PROTECTION VIC_REG(0x006C) /* 1: ENABLE */ +#define VIC_CONFIG VIC_REG(0x0068) /* 1: USE ARM1136 VIC */ +#endif + +#define VIC_IRQ_STATUS0 VIC_REG(0x0080) +#define VIC_IRQ_STATUS1 VIC_REG(0x0084) +#define VIC_IRQ_STATUS2 VIC_REG(0x0088) +#define VIC_IRQ_STATUS3 VIC_REG(0x008C) +#define VIC_FIQ_STATUS0 VIC_REG(0x0090) +#define VIC_FIQ_STATUS1 VIC_REG(0x0094) +#define VIC_FIQ_STATUS2 VIC_REG(0x0098) +#define VIC_FIQ_STATUS3 VIC_REG(0x009C) +#define VIC_RAW_STATUS0 VIC_REG(0x00A0) +#define VIC_RAW_STATUS1 VIC_REG(0x00A4) +#define VIC_RAW_STATUS2 VIC_REG(0x00A8) +#define VIC_RAW_STATUS3 VIC_REG(0x00AC) +#define VIC_INT_CLEAR0 VIC_REG(0x00B0) +#define VIC_INT_CLEAR1 VIC_REG(0x00B4) +#define VIC_INT_CLEAR2 VIC_REG(0x00B8) +#define VIC_INT_CLEAR3 VIC_REG(0x00BC) +#define VIC_SOFTINT0 VIC_REG(0x00C0) +#define VIC_SOFTINT1 VIC_REG(0x00C4) +#define VIC_SOFTINT2 VIC_REG(0x00C8) +#define VIC_SOFTINT3 VIC_REG(0x00CC) +#define VIC_IRQ_VEC_RD VIC_REG(0x00D0) /* pending int # */ +#define VIC_IRQ_VEC_PEND_RD VIC_REG(0x00D4) /* pending vector addr */ +#define VIC_IRQ_VEC_WR VIC_REG(0x00D8) + +#if defined(CONFIG_ARCH_MSM_SCORPION) +#define VIC_FIQ_VEC_RD VIC_REG(0x00DC) +#define VIC_FIQ_VEC_PEND_RD VIC_REG(0x00E0) +#define VIC_FIQ_VEC_WR VIC_REG(0x00E4) +#define VIC_IRQ_IN_SERVICE VIC_REG(0x00E8) +#define VIC_IRQ_IN_STACK VIC_REG(0x00EC) +#define VIC_FIQ_IN_SERVICE VIC_REG(0x00F0) +#define VIC_FIQ_IN_STACK VIC_REG(0x00F4) +#define VIC_TEST_BUS_SEL VIC_REG(0x00F8) +#define VIC_IRQ_CTRL_CONFIG VIC_REG(0x00FC) +#else +#define VIC_IRQ_IN_SERVICE VIC_REG(0x00E0) +#define VIC_IRQ_IN_STACK VIC_REG(0x00E4) +#define VIC_TEST_BUS_SEL VIC_REG(0x00E8) +#endif + +#define VIC_VECTPRIORITY(n) VIC_REG(0x0200+((n) * 4)) +#define VIC_VECTADDR(n) VIC_REG(0x0400+((n) * 4)) + +#if defined(CONFIG_ARCH_MSM7X30) +#define VIC_NUM_REGS 4 +#else +#define VIC_NUM_REGS 2 +#endif + +#if VIC_NUM_REGS == 2 +#define DPRINT_REGS(base_reg, format, ...) \ + printk(KERN_INFO format " %x %x\n", ##__VA_ARGS__, \ + readl(base_reg ## 0), readl(base_reg ## 1)) +#define DPRINT_ARRAY(array, format, ...) \ + printk(KERN_INFO format " %x %x\n", ##__VA_ARGS__, \ + array[0], array[1]) +#elif VIC_NUM_REGS == 4 +#define DPRINT_REGS(base_reg, format, ...) \ + printk(KERN_INFO format " %x %x %x %x\n", ##__VA_ARGS__, \ + readl(base_reg ## 0), readl(base_reg ## 1), \ + readl(base_reg ## 2), readl(base_reg ## 3)) +#define DPRINT_ARRAY(array, format, ...) \ + printk(KERN_INFO format " %x %x %x %x\n", ##__VA_ARGS__, \ + array[0], array[1], \ + array[2], array[3]) +#else +#error "VIC_NUM_REGS set to illegal value" +#endif + +static uint32_t msm_irq_smsm_wake_enable[2]; +static struct { + uint32_t int_en[2]; + uint32_t int_type; + uint32_t int_polarity; + uint32_t int_select; +} msm_irq_shadow_reg[VIC_NUM_REGS]; +static uint32_t msm_irq_idle_disable[VIC_NUM_REGS]; + +#define SMSM_FAKE_IRQ (0xff) +static uint8_t msm_irq_to_smsm[NR_IRQS] = { + [INT_MDDI_EXT] = 1, + [INT_MDDI_PRI] = 2, + [INT_MDDI_CLIENT] = 3, + [INT_USB_OTG] = 4, + + [INT_PWB_I2C] = 5, + [INT_SDC1_0] = 6, + [INT_SDC1_1] = 7, + [INT_SDC2_0] = 8, + + [INT_SDC2_1] = 9, + [INT_ADSP_A9_A11] = 10, + [INT_UART1] = 11, + [INT_UART2] = 12, + + [INT_UART3] = 13, + [INT_UART1_RX] = 14, + [INT_UART2_RX] = 15, + [INT_UART3_RX] = 16, + + [INT_UART1DM_IRQ] = 17, + [INT_UART1DM_RX] = 18, + [INT_KEYSENSE] = 19, +#if !defined(CONFIG_ARCH_MSM7X30) + [INT_AD_HSSD] = 20, +#endif + + [INT_NAND_WR_ER_DONE] = 21, + [INT_NAND_OP_DONE] = 22, + [INT_TCHSCRN1] = 23, + [INT_TCHSCRN2] = 24, + + [INT_TCHSCRN_SSBI] = 25, + [INT_USB_HS] = 26, + [INT_UART2DM_RX] = 27, + [INT_UART2DM_IRQ] = 28, + + [INT_SDC4_1] = 29, + [INT_SDC4_0] = 30, + [INT_SDC3_1] = 31, + [INT_SDC3_0] = 32, + + /* fake wakeup interrupts */ + [INT_GPIO_GROUP1] = SMSM_FAKE_IRQ, + [INT_GPIO_GROUP2] = SMSM_FAKE_IRQ, + [INT_A9_M2A_0] = SMSM_FAKE_IRQ, + [INT_A9_M2A_1] = SMSM_FAKE_IRQ, + [INT_A9_M2A_5] = SMSM_FAKE_IRQ, + [INT_GP_TIMER_EXP] = SMSM_FAKE_IRQ, + [INT_DEBUG_TIMER_EXP] = SMSM_FAKE_IRQ, + [INT_ADSP_A11] = SMSM_FAKE_IRQ, +#ifdef CONFIG_ARCH_QSD8X50 + [INT_SIRC_0] = SMSM_FAKE_IRQ, + [INT_SIRC_1] = SMSM_FAKE_IRQ, +#endif +}; + +static inline void msm_irq_write_all_regs(void __iomem *base, unsigned int val) +{ + int i; + + for (i = 0; i < VIC_NUM_REGS; i++) + writel(val, base + (i * 4)); +} + +static void msm_irq_ack(unsigned int irq) +{ + void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_CLEAR0, irq); + irq = 1 << (irq & 31); + writel(irq, reg); +} + +static void msm_irq_mask(unsigned int irq) +{ + void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_ENCLEAR0, irq); + unsigned index = VIC_INT_TO_REG_INDEX(irq); + uint32_t mask = 1UL << (irq & 31); + int smsm_irq = msm_irq_to_smsm[irq]; + + msm_irq_shadow_reg[index].int_en[0] &= ~mask; + writel(mask, reg); + if (smsm_irq == 0) + msm_irq_idle_disable[index] &= ~mask; + else { + mask = 1UL << (smsm_irq - 1); + msm_irq_smsm_wake_enable[0] &= ~mask; + } +} + +static void msm_irq_unmask(unsigned int irq) +{ + void __iomem *reg = VIC_INT_TO_REG_ADDR(VIC_INT_ENSET0, irq); + unsigned index = VIC_INT_TO_REG_INDEX(irq); + uint32_t mask = 1UL << (irq & 31); + int smsm_irq = msm_irq_to_smsm[irq]; + + msm_irq_shadow_reg[index].int_en[0] |= mask; + writel(mask, reg); + + if (smsm_irq == 0) + msm_irq_idle_disable[index] |= mask; + else { + mask = 1UL << (smsm_irq - 1); + msm_irq_smsm_wake_enable[0] |= mask; + } +} + +static int msm_irq_set_wake(unsigned int irq, unsigned int on) +{ + unsigned index = VIC_INT_TO_REG_INDEX(irq); + uint32_t mask = 1UL << (irq & 31); + int smsm_irq = msm_irq_to_smsm[irq]; + + if (smsm_irq == 0) { + printk(KERN_ERR "msm_irq_set_wake: bad wakeup irq %d\n", irq); + return -EINVAL; + } + if (on) + msm_irq_shadow_reg[index].int_en[1] |= mask; + else + msm_irq_shadow_reg[index].int_en[1] &= ~mask; + + if (smsm_irq == SMSM_FAKE_IRQ) + return 0; + + mask = 1UL << (smsm_irq - 1); + if (on) + msm_irq_smsm_wake_enable[1] |= mask; + else + msm_irq_smsm_wake_enable[1] &= ~mask; + return 0; +} + +static int msm_irq_set_type(unsigned int irq, unsigned int flow_type) +{ + void __iomem *treg = VIC_INT_TO_REG_ADDR(VIC_INT_TYPE0, irq); + void __iomem *preg = VIC_INT_TO_REG_ADDR(VIC_INT_POLARITY0, irq); + unsigned index = VIC_INT_TO_REG_INDEX(irq); + int b = 1 << (irq & 31); + uint32_t polarity; + uint32_t type; + + polarity = msm_irq_shadow_reg[index].int_polarity; + if (flow_type & (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW)) + polarity |= b; + if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_HIGH)) + polarity &= ~b; + writel(polarity, preg); + msm_irq_shadow_reg[index].int_polarity = polarity; + + type = msm_irq_shadow_reg[index].int_type; + if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { + type |= b; + irq_desc[irq].handle_irq = handle_edge_irq; + } + if (flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) { + type &= ~b; + irq_desc[irq].handle_irq = handle_level_irq; + } + writel(type, treg); + msm_irq_shadow_reg[index].int_type = type; + return 0; +} + +static struct irq_chip msm_irq_chip = { + .name = "msm", + .disable = msm_irq_mask, + .ack = msm_irq_ack, + .mask = msm_irq_mask, + .unmask = msm_irq_unmask, + .set_wake = msm_irq_set_wake, + .set_type = msm_irq_set_type, +}; + +void __init msm_init_irq(void) +{ + unsigned n; + + /* select level interrupts */ + msm_irq_write_all_regs(VIC_INT_TYPE0, 0); + + /* select highlevel interrupts */ + msm_irq_write_all_regs(VIC_INT_POLARITY0, 0); + + /* select IRQ for all INTs */ + msm_irq_write_all_regs(VIC_INT_SELECT0, 0); + + /* disable all INTs */ + msm_irq_write_all_regs(VIC_INT_EN0, 0); + + /* don't use vic */ + writel(0, VIC_CONFIG); + + /* enable interrupt controller */ + writel(3, VIC_INT_MASTEREN); + + for (n = 0; n < NR_MSM_IRQS; n++) { + set_irq_chip(n, &msm_irq_chip); + set_irq_handler(n, handle_level_irq); + set_irq_flags(n, IRQF_VALID); + } +} |