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ARM: 6091/1: ST SPEAr: Adding support for shared irq layer 

Multiple peripherals in SPEAr share common hardware interrupt lines.
This patch adds support for a shared irq layer, which registers hardware
irqs by itself and exposes virtual irq numbers to peripherals.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
viresh kumar 2010-05-03 09:24:30 +01:00 committed by Russell King
parent ff37f6e591
commit 4c18e77f71
11 changed files with 718 additions and 8 deletions
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101
arch/arm/mach-spear3xx/include/mach/irqs.h
View File

@ -14,7 +14,7 @@
#ifndef __MACH_IRQS_H
#define __MACH_IRQS_H
/* IRQ definitions */
/* SPEAr3xx IRQ definitions */
#define IRQ_HW_ACCEL_MOD_0 0
#define IRQ_INTRCOMM_RAS_ARM 1
#define IRQ_CPU_GPT1_1 2
@ -50,16 +50,103 @@
#define IRQ_HW_ACCEL_MOD_1 31
#define IRQ_VIC_END 32
#define SPEAR_GPIO_INT_BASE IRQ_VIC_END
#define VIRQ_START IRQ_VIC_END
/* SPEAr300 Virtual irq definitions */
#ifdef CONFIG_MACH_SPEAR300
#define SPEAR_GPIO1_INT_BASE (SPEAR_GPIO_INT_BASE + 8)
#define SPEAR_GPIO_INT_END (SPEAR_GPIO1_INT_BASE + 8)
/* IRQs sharing IRQ_GEN_RAS_1 */
#define VIRQ_IT_PERS_S (VIRQ_START + 0)
#define VIRQ_IT_CHANGE_S (VIRQ_START + 1)
#define VIRQ_I2S (VIRQ_START + 2)
#define VIRQ_TDM (VIRQ_START + 3)
#define VIRQ_CAMERA_L (VIRQ_START + 4)
#define VIRQ_CAMERA_F (VIRQ_START + 5)
#define VIRQ_CAMERA_V (VIRQ_START + 6)
#define VIRQ_KEYBOARD (VIRQ_START + 7)
#define VIRQ_GPIO1 (VIRQ_START + 8)
/* IRQs sharing IRQ_GEN_RAS_3 */
#define IRQ_CLCD IRQ_GEN_RAS_3
/* IRQs sharing IRQ_INTRCOMM_RAS_ARM */
#define IRQ_SDIO IRQ_INTRCOMM_RAS_ARM
/* GPIO pins virtual irqs */
#define SPEAR_GPIO_INT_BASE (VIRQ_START + 9)
#define SPEAR_GPIO1_INT_BASE (SPEAR_GPIO_INT_BASE + 8)
#define SPEAR_GPIO_INT_END (SPEAR_GPIO1_INT_BASE + 8)
/* SPEAr310 Virtual irq definitions */
#elif defined(CONFIG_MACH_SPEAR310)
/* IRQs sharing IRQ_GEN_RAS_1 */
#define VIRQ_SMII0 (VIRQ_START + 0)
#define VIRQ_SMII1 (VIRQ_START + 1)
#define VIRQ_SMII2 (VIRQ_START + 2)
#define VIRQ_SMII3 (VIRQ_START + 3)
#define VIRQ_WAKEUP_SMII0 (VIRQ_START + 4)
#define VIRQ_WAKEUP_SMII1 (VIRQ_START + 5)
#define VIRQ_WAKEUP_SMII2 (VIRQ_START + 6)
#define VIRQ_WAKEUP_SMII3 (VIRQ_START + 7)
/* IRQs sharing IRQ_GEN_RAS_2 */
#define VIRQ_UART1 (VIRQ_START + 8)
#define VIRQ_UART2 (VIRQ_START + 9)
#define VIRQ_UART3 (VIRQ_START + 10)
#define VIRQ_UART4 (VIRQ_START + 11)
#define VIRQ_UART5 (VIRQ_START + 12)
/* IRQs sharing IRQ_GEN_RAS_3 */
#define VIRQ_EMI (VIRQ_START + 13)
#define VIRQ_PLGPIO (VIRQ_START + 14)
/* IRQs sharing IRQ_INTRCOMM_RAS_ARM */
#define VIRQ_TDM_HDLC (VIRQ_START + 15)
#define VIRQ_RS485_0 (VIRQ_START + 16)
#define VIRQ_RS485_1 (VIRQ_START + 17)
/* GPIO pins virtual irqs */
#define SPEAR_GPIO_INT_BASE (VIRQ_START + 18)
/* SPEAr320 Virtual irq definitions */
#else
#define SPEAR_GPIO_INT_END (SPEAR_GPIO_INT_BASE + 8)
/* IRQs sharing IRQ_GEN_RAS_1 */
#define VIRQ_EMI (VIRQ_START + 0)
#define VIRQ_CLCD (VIRQ_START + 1)
#define VIRQ_SPP (VIRQ_START + 2)
/* IRQs sharing IRQ_GEN_RAS_2 */
#define IRQ_SDIO IRQ_GEN_RAS_2
/* IRQs sharing IRQ_GEN_RAS_3 */
#define VIRQ_PLGPIO (VIRQ_START + 3)
#define VIRQ_I2S_PLAY (VIRQ_START + 4)
#define VIRQ_I2S_REC (VIRQ_START + 5)
/* IRQs sharing IRQ_INTRCOMM_RAS_ARM */
#define VIRQ_CANU (VIRQ_START + 6)
#define VIRQ_CANL (VIRQ_START + 7)
#define VIRQ_UART1 (VIRQ_START + 8)
#define VIRQ_UART2 (VIRQ_START + 9)
#define VIRQ_SSP1 (VIRQ_START + 10)
#define VIRQ_SSP2 (VIRQ_START + 11)
#define VIRQ_SMII0 (VIRQ_START + 12)
#define VIRQ_MII1_SMII1 (VIRQ_START + 13)
#define VIRQ_WAKEUP_SMII0 (VIRQ_START + 14)
#define VIRQ_WAKEUP_MII1_SMII1 (VIRQ_START + 15)
#define VIRQ_I2C (VIRQ_START + 16)
/* GPIO pins virtual irqs */
#define SPEAR_GPIO_INT_BASE (VIRQ_START + 17)
#endif
#define VIRTUAL_IRQS (SPEAR_GPIO_INT_END - IRQ_VIC_END)
#define NR_IRQS (IRQ_VIC_END + VIRTUAL_IRQS)
/* PLGPIO Virtual IRQs */
#if defined(CONFIG_MACH_SPEAR310) || defined(CONFIG_MACH_SPEAR320)
#define SPEAR_PLGPIO_INT_BASE (SPEAR_GPIO_INT_BASE + 8)
#define SPEAR_GPIO_INT_END (SPEAR_PLGPIO_INT_BASE + 102)
#endif
#define VIRQ_END SPEAR_GPIO_INT_END
#define NR_IRQS VIRQ_END
#endif /* __MACH_IRQS_H */

16
arch/arm/mach-spear3xx/include/mach/spear300.h
View File

@ -20,6 +20,22 @@
#define SPEAR300_TELECOM_BASE 0x50000000
#define SPEAR300_TELECOM_SIZE 0x10000000
/* Interrupt registers offsets and masks */
#define SPEAR300_TELECOM_REG_SIZE 0x00010000
#define INT_ENB_MASK_REG 0x54
#define INT_STS_MASK_REG 0x58
#define IT_PERS_S_IRQ_MASK (1 << 0)
#define IT_CHANGE_S_IRQ_MASK (1 << 1)
#define I2S_IRQ_MASK (1 << 2)
#define TDM_IRQ_MASK (1 << 3)
#define CAMERA_L_IRQ_MASK (1 << 4)
#define CAMERA_F_IRQ_MASK (1 << 5)
#define CAMERA_V_IRQ_MASK (1 << 6)
#define KEYBOARD_IRQ_MASK (1 << 7)
#define GPIO1_IRQ_MASK (1 << 8)
#define SHIRQ_RAS1_MASK 0x1FF
#define SPEAR300_CLCD_BASE 0x60000000
#define SPEAR300_CLCD_SIZE 0x10000000

24
arch/arm/mach-spear3xx/include/mach/spear310.h
View File

@ -40,6 +40,30 @@
#define SPEAR310_SOC_CONFIG_BASE 0xB4000000
#define SPEAR310_SOC_CONFIG_SIZE 0x00000070
/* Interrupt registers offsets and masks */
#define INT_STS_MASK_REG 0x04
#define SMII0_IRQ_MASK (1 << 0)
#define SMII1_IRQ_MASK (1 << 1)
#define SMII2_IRQ_MASK (1 << 2)
#define SMII3_IRQ_MASK (1 << 3)
#define WAKEUP_SMII0_IRQ_MASK (1 << 4)
#define WAKEUP_SMII1_IRQ_MASK (1 << 5)
#define WAKEUP_SMII2_IRQ_MASK (1 << 6)
#define WAKEUP_SMII3_IRQ_MASK (1 << 7)
#define UART1_IRQ_MASK (1 << 8)
#define UART2_IRQ_MASK (1 << 9)
#define UART3_IRQ_MASK (1 << 10)
#define UART4_IRQ_MASK (1 << 11)
#define UART5_IRQ_MASK (1 << 12)
#define EMI_IRQ_MASK (1 << 13)
#define TDM_HDLC_IRQ_MASK (1 << 14)
#define RS485_0_IRQ_MASK (1 << 15)
#define RS485_1_IRQ_MASK (1 << 16)
#define SHIRQ_RAS1_MASK 0x000FF
#define SHIRQ_RAS2_MASK 0x01F00
#define SHIRQ_RAS3_MASK 0x02000
#define SHIRQ_INTRCOMM_RAS_MASK 0x1C000
#endif /* __MACH_SPEAR310_H */

26
arch/arm/mach-spear3xx/include/mach/spear320.h
View File

@ -64,6 +64,32 @@
#define SPEAR320_SOC_CONFIG_BASE 0xB4000000
#define SPEAR320_SOC_CONFIG_SIZE 0x00000070
/* Interrupt registers offsets and masks */
#define INT_STS_MASK_REG 0x04
#define INT_CLR_MASK_REG 0x04
#define INT_ENB_MASK_REG 0x08
#define GPIO_IRQ_MASK (1 << 0)
#define I2S_PLAY_IRQ_MASK (1 << 1)
#define I2S_REC_IRQ_MASK (1 << 2)
#define EMI_IRQ_MASK (1 << 7)
#define CLCD_IRQ_MASK (1 << 8)
#define SPP_IRQ_MASK (1 << 9)
#define SDIO_IRQ_MASK (1 << 10)
#define CAN_U_IRQ_MASK (1 << 11)
#define CAN_L_IRQ_MASK (1 << 12)
#define UART1_IRQ_MASK (1 << 13)
#define UART2_IRQ_MASK (1 << 14)
#define SSP1_IRQ_MASK (1 << 15)
#define SSP2_IRQ_MASK (1 << 16)
#define SMII0_IRQ_MASK (1 << 17)
#define MII1_SMII1_IRQ_MASK (1 << 18)
#define WAKEUP_SMII0_IRQ_MASK (1 << 19)
#define WAKEUP_MII1_SMII1_IRQ_MASK (1 << 20)
#define I2C1_IRQ_MASK (1 << 21)
#define SHIRQ_RAS1_MASK 0x000380
#define SHIRQ_RAS3_MASK 0x000007
#define SHIRQ_INTRCOMM_RAS_MASK 0x3FF800
#endif /* __MACH_SPEAR320_H */

67
arch/arm/mach-spear3xx/spear300.c
View File

@ -17,6 +17,7 @@
#include <asm/irq.h>
#include <mach/generic.h>
#include <mach/spear.h>
#include <plat/shirq.h>
/* pad multiplexing support */
/* muxing registers */
@ -386,14 +387,78 @@ struct amba_device gpio1_device = {
.end = SPEAR300_GPIO_BASE + SPEAR300_GPIO_SIZE - 1,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_GEN_RAS_1, NO_IRQ},
.irq = {VIRQ_GPIO1, NO_IRQ},
};
/* spear3xx shared irq */
struct shirq_dev_config shirq_ras1_config[] = {
{
.virq = VIRQ_IT_PERS_S,
.enb_mask = IT_PERS_S_IRQ_MASK,
.status_mask = IT_PERS_S_IRQ_MASK,
}, {
.virq = VIRQ_IT_CHANGE_S,
.enb_mask = IT_CHANGE_S_IRQ_MASK,
.status_mask = IT_CHANGE_S_IRQ_MASK,
}, {
.virq = VIRQ_I2S,
.enb_mask = I2S_IRQ_MASK,
.status_mask = I2S_IRQ_MASK,
}, {
.virq = VIRQ_TDM,
.enb_mask = TDM_IRQ_MASK,
.status_mask = TDM_IRQ_MASK,
}, {
.virq = VIRQ_CAMERA_L,
.enb_mask = CAMERA_L_IRQ_MASK,
.status_mask = CAMERA_L_IRQ_MASK,
}, {
.virq = VIRQ_CAMERA_F,
.enb_mask = CAMERA_F_IRQ_MASK,
.status_mask = CAMERA_F_IRQ_MASK,
}, {
.virq = VIRQ_CAMERA_V,
.enb_mask = CAMERA_V_IRQ_MASK,
.status_mask = CAMERA_V_IRQ_MASK,
}, {
.virq = VIRQ_KEYBOARD,
.enb_mask = KEYBOARD_IRQ_MASK,
.status_mask = KEYBOARD_IRQ_MASK,
}, {
.virq = VIRQ_GPIO1,
.enb_mask = GPIO1_IRQ_MASK,
.status_mask = GPIO1_IRQ_MASK,
},
};
struct spear_shirq shirq_ras1 = {
.irq = IRQ_GEN_RAS_1,
.dev_config = shirq_ras1_config,
.dev_count = ARRAY_SIZE(shirq_ras1_config),
.regs = {
.enb_reg = INT_ENB_MASK_REG,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_RAS1_MASK,
.clear_reg = -1,
},
};
/* spear300 routines */
void __init spear300_init(void)
{
int ret = 0;
/* call spear3xx family common init function */
spear3xx_init();
/* shared irq registeration */
shirq_ras1.regs.base =
ioremap(SPEAR300_TELECOM_BASE, SPEAR300_TELECOM_REG_SIZE);
if (shirq_ras1.regs.base) {
ret = spear_shirq_register(&shirq_ras1);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ\n");
}
}
void spear300_pmx_init(void)

148
arch/arm/mach-spear3xx/spear310.c
View File

@ -15,6 +15,7 @@
#include <asm/irq.h>
#include <mach/generic.h>
#include <mach/spear.h>
#include <plat/shirq.h>
/* pad multiplexing support */
/* muxing registers */
@ -140,11 +141,158 @@ struct pmx_driver pmx_driver = {
/* Add spear310 specific devices here */
/* spear3xx shared irq */
struct shirq_dev_config shirq_ras1_config[] = {
{
.virq = VIRQ_SMII0,
.status_mask = SMII0_IRQ_MASK,
}, {
.virq = VIRQ_SMII1,
.status_mask = SMII1_IRQ_MASK,
}, {
.virq = VIRQ_SMII2,
.status_mask = SMII2_IRQ_MASK,
}, {
.virq = VIRQ_SMII3,
.status_mask = SMII3_IRQ_MASK,
}, {
.virq = VIRQ_WAKEUP_SMII0,
.status_mask = WAKEUP_SMII0_IRQ_MASK,
}, {
.virq = VIRQ_WAKEUP_SMII1,
.status_mask = WAKEUP_SMII1_IRQ_MASK,
}, {
.virq = VIRQ_WAKEUP_SMII2,
.status_mask = WAKEUP_SMII2_IRQ_MASK,
}, {
.virq = VIRQ_WAKEUP_SMII3,
.status_mask = WAKEUP_SMII3_IRQ_MASK,
},
};
struct spear_shirq shirq_ras1 = {
.irq = IRQ_GEN_RAS_1,
.dev_config = shirq_ras1_config,
.dev_count = ARRAY_SIZE(shirq_ras1_config),
.regs = {
.enb_reg = -1,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_RAS1_MASK,
.clear_reg = -1,
},
};
struct shirq_dev_config shirq_ras2_config[] = {
{
.virq = VIRQ_UART1,
.status_mask = UART1_IRQ_MASK,
}, {
.virq = VIRQ_UART2,
.status_mask = UART2_IRQ_MASK,
}, {
.virq = VIRQ_UART3,
.status_mask = UART3_IRQ_MASK,
}, {
.virq = VIRQ_UART4,
.status_mask = UART4_IRQ_MASK,
}, {
.virq = VIRQ_UART5,
.status_mask = UART5_IRQ_MASK,
},
};
struct spear_shirq shirq_ras2 = {
.irq = IRQ_GEN_RAS_2,
.dev_config = shirq_ras2_config,
.dev_count = ARRAY_SIZE(shirq_ras2_config),
.regs = {
.enb_reg = -1,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_RAS2_MASK,
.clear_reg = -1,
},
};
struct shirq_dev_config shirq_ras3_config[] = {
{
.virq = VIRQ_EMI,
.status_mask = EMI_IRQ_MASK,
},
};
struct spear_shirq shirq_ras3 = {
.irq = IRQ_GEN_RAS_3,
.dev_config = shirq_ras3_config,
.dev_count = ARRAY_SIZE(shirq_ras3_config),
.regs = {
.enb_reg = -1,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_RAS3_MASK,
.clear_reg = -1,
},
};
struct shirq_dev_config shirq_intrcomm_ras_config[] = {
{
.virq = VIRQ_TDM_HDLC,
.status_mask = TDM_HDLC_IRQ_MASK,
}, {
.virq = VIRQ_RS485_0,
.status_mask = RS485_0_IRQ_MASK,
}, {
.virq = VIRQ_RS485_1,
.status_mask = RS485_1_IRQ_MASK,
},
};
struct spear_shirq shirq_intrcomm_ras = {
.irq = IRQ_INTRCOMM_RAS_ARM,
.dev_config = shirq_intrcomm_ras_config,
.dev_count = ARRAY_SIZE(shirq_intrcomm_ras_config),
.regs = {
.enb_reg = -1,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_INTRCOMM_RAS_MASK,
.clear_reg = -1,
},
};
/* spear310 routines */
void __init spear310_init(void)
{
void __iomem *base;
int ret = 0;
/* call spear3xx family common init function */
spear3xx_init();
/* shared irq registeration */
base = ioremap(SPEAR310_SOC_CONFIG_BASE, SPEAR310_SOC_CONFIG_SIZE);
if (base) {
/* shirq 1 */
shirq_ras1.regs.base = base;
ret = spear_shirq_register(&shirq_ras1);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ 1\n");
/* shirq 2 */
shirq_ras2.regs.base = base;
ret = spear_shirq_register(&shirq_ras2);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ 2\n");
/* shirq 3 */
shirq_ras3.regs.base = base;
ret = spear_shirq_register(&shirq_ras3);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ 3\n");
/* shirq 4 */
shirq_intrcomm_ras.regs.base = base;
ret = spear_shirq_register(&shirq_intrcomm_ras);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ 4\n");
}
}
void spear310_pmx_init(void)

150
arch/arm/mach-spear3xx/spear320.c
View File

@ -15,6 +15,7 @@
#include <asm/irq.h>
#include <mach/generic.h>
#include <mach/spear.h>
#include <plat/shirq.h>
/* pad multiplexing support */
/* muxing registers */
@ -385,11 +386,160 @@ struct pmx_driver pmx_driver = {
/* Add spear320 specific devices here */
/* spear3xx shared irq */
struct shirq_dev_config shirq_ras1_config[] = {
{
.virq = VIRQ_EMI,
.status_mask = EMI_IRQ_MASK,
.clear_mask = EMI_IRQ_MASK,
}, {
.virq = VIRQ_CLCD,
.status_mask = CLCD_IRQ_MASK,
.clear_mask = CLCD_IRQ_MASK,
}, {
.virq = VIRQ_SPP,
.status_mask = SPP_IRQ_MASK,
.clear_mask = SPP_IRQ_MASK,
},
};
struct spear_shirq shirq_ras1 = {
.irq = IRQ_GEN_RAS_1,
.dev_config = shirq_ras1_config,
.dev_count = ARRAY_SIZE(shirq_ras1_config),
.regs = {
.enb_reg = -1,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_RAS1_MASK,
.clear_reg = INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
struct shirq_dev_config shirq_ras3_config[] = {
{
.virq = VIRQ_PLGPIO,
.enb_mask = GPIO_IRQ_MASK,
.status_mask = GPIO_IRQ_MASK,
.clear_mask = GPIO_IRQ_MASK,
}, {
.virq = VIRQ_I2S_PLAY,
.enb_mask = I2S_PLAY_IRQ_MASK,
.status_mask = I2S_PLAY_IRQ_MASK,
.clear_mask = I2S_PLAY_IRQ_MASK,
}, {
.virq = VIRQ_I2S_REC,
.enb_mask = I2S_REC_IRQ_MASK,
.status_mask = I2S_REC_IRQ_MASK,
.clear_mask = I2S_REC_IRQ_MASK,
},
};
struct spear_shirq shirq_ras3 = {
.irq = IRQ_GEN_RAS_3,
.dev_config = shirq_ras3_config,
.dev_count = ARRAY_SIZE(shirq_ras3_config),
.regs = {
.enb_reg = INT_ENB_MASK_REG,
.reset_to_enb = 1,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_RAS3_MASK,
.clear_reg = INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
struct shirq_dev_config shirq_intrcomm_ras_config[] = {
{
.virq = VIRQ_CANU,
.status_mask = CAN_U_IRQ_MASK,
.clear_mask = CAN_U_IRQ_MASK,
}, {
.virq = VIRQ_CANL,
.status_mask = CAN_L_IRQ_MASK,
.clear_mask = CAN_L_IRQ_MASK,
}, {
.virq = VIRQ_UART1,
.status_mask = UART1_IRQ_MASK,
.clear_mask = UART1_IRQ_MASK,
}, {
.virq = VIRQ_UART2,
.status_mask = UART2_IRQ_MASK,
.clear_mask = UART2_IRQ_MASK,
}, {
.virq = VIRQ_SSP1,
.status_mask = SSP1_IRQ_MASK,
.clear_mask = SSP1_IRQ_MASK,
}, {
.virq = VIRQ_SSP2,
.status_mask = SSP2_IRQ_MASK,
.clear_mask = SSP2_IRQ_MASK,
}, {
.virq = VIRQ_SMII0,
.status_mask = SMII0_IRQ_MASK,
.clear_mask = SMII0_IRQ_MASK,
}, {
.virq = VIRQ_MII1_SMII1,
.status_mask = MII1_SMII1_IRQ_MASK,
.clear_mask = MII1_SMII1_IRQ_MASK,
}, {
.virq = VIRQ_WAKEUP_SMII0,
.status_mask = WAKEUP_SMII0_IRQ_MASK,
.clear_mask = WAKEUP_SMII0_IRQ_MASK,
}, {
.virq = VIRQ_WAKEUP_MII1_SMII1,
.status_mask = WAKEUP_MII1_SMII1_IRQ_MASK,
.clear_mask = WAKEUP_MII1_SMII1_IRQ_MASK,
}, {
.virq = VIRQ_I2C,
.status_mask = I2C1_IRQ_MASK,
.clear_mask = I2C1_IRQ_MASK,
},
};
struct spear_shirq shirq_intrcomm_ras = {
.irq = IRQ_INTRCOMM_RAS_ARM,
.dev_config = shirq_intrcomm_ras_config,
.dev_count = ARRAY_SIZE(shirq_intrcomm_ras_config),
.regs = {
.enb_reg = -1,
.status_reg = INT_STS_MASK_REG,
.status_reg_mask = SHIRQ_INTRCOMM_RAS_MASK,
.clear_reg = INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
/* spear320 routines */
void __init spear320_init(void)
{
void __iomem *base;
int ret = 0;
/* call spear3xx family common init function */
spear3xx_init();
/* shared irq registeration */
base = ioremap(SPEAR320_SOC_CONFIG_BASE, SPEAR320_SOC_CONFIG_SIZE);
if (base) {
/* shirq 1 */
shirq_ras1.regs.base = base;
ret = spear_shirq_register(&shirq_ras1);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ 1\n");
/* shirq 3 */
shirq_ras3.regs.base = base;
ret = spear_shirq_register(&shirq_ras3);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ 3\n");
/* shirq 4 */
shirq_intrcomm_ras.regs.base = base;
ret = spear_shirq_register(&shirq_intrcomm_ras);
if (ret)
printk(KERN_ERR "Error registering Shared IRQ 4\n");
}
}
void spear320_pmx_init(void)

1
arch/arm/mach-spear6xx/include/mach/irqs.h
View File

@ -85,6 +85,7 @@
#define IRQ_VIC_END 64
/* GPIO pins virtual irqs */
#define SPEAR_GPIO_INT_BASE IRQ_VIC_END
#define SPEAR_GPIO0_INT_BASE SPEAR_GPIO_INT_BASE
#define SPEAR_GPIO1_INT_BASE (SPEAR_GPIO0_INT_BASE + 8)

2
arch/arm/plat-spear/Makefile
View File

@ -4,3 +4,5 @@
# Common support
obj-y := clock.o padmux.o time.o
obj-$(CONFIG_ARCH_SPEAR3XX) += shirq.o

73
arch/arm/plat-spear/include/plat/shirq.h Normal file
View File

@ -0,0 +1,73 @@
/*
* arch/arm/plat-spear/include/plat/shirq.h
*
* SPEAr platform shared irq layer header file
*
* Copyright (C) 2009 ST Microelectronics
* Viresh Kumar<viresh.kumar@st.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.
*/
#ifndef __PLAT_SHIRQ_H
#define __PLAT_SHIRQ_H
#include <linux/irq.h>
#include <linux/types.h>
/*
* struct shirq_dev_config: shared irq device configuration
*
* virq: virtual irq number of device
* enb_mask: enable mask of device
* status_mask: status mask of device
* clear_mask: clear mask of device
*/
struct shirq_dev_config {
u32 virq;
u32 enb_mask;
u32 status_mask;
u32 clear_mask;
};
/*
* struct shirq_regs: shared irq register configuration
*
* base: base address of shared irq register
* enb_reg: enable register offset
* reset_to_enb: val 1 indicates, we need to clear bit for enabling interrupt
* status_reg: status register offset
* status_reg_mask: status register valid mask
* clear_reg: clear register offset
* reset_to_clear: val 1 indicates, we need to clear bit for clearing interrupt
*/
struct shirq_regs {
void __iomem *base;
u32 enb_reg;
u32 reset_to_enb;
u32 status_reg;
u32 status_reg_mask;
u32 clear_reg;
u32 reset_to_clear;
};
/*
* struct spear_shirq: shared irq structure
*
* irq: hardware irq number
* dev_config: array of device config structures which are using "irq" line
* dev_count: size of dev_config array
* regs: register configuration for shared irq block
*/
struct spear_shirq {
u32 irq;
struct shirq_dev_config *dev_config;
u32 dev_count;
struct shirq_regs regs;
};
int spear_shirq_register(struct spear_shirq *shirq);
#endif /* __PLAT_SHIRQ_H */

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/*
* arch/arm/plat-spear/shirq.c
*
* SPEAr platform shared irq layer source file
*
* Copyright (C) 2009 ST Microelectronics
* Viresh Kumar<viresh.kumar@st.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.
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/spinlock.h>
#include <plat/shirq.h>
struct spear_shirq *shirq;
static DEFINE_SPINLOCK(lock);
static void shirq_irq_mask(unsigned irq)
{
struct spear_shirq *shirq = get_irq_chip_data(irq);
u32 val, id = irq - shirq->dev_config[0].virq;
unsigned long flags;
if ((shirq->regs.enb_reg == -1) || shirq->dev_config[id].enb_mask == -1)
return;
spin_lock_irqsave(&lock, flags);
val = readl(shirq->regs.base + shirq->regs.enb_reg);
if (shirq->regs.reset_to_enb)
val |= shirq->dev_config[id].enb_mask;
else
val &= ~(shirq->dev_config[id].enb_mask);
writel(val, shirq->regs.base + shirq->regs.enb_reg);
spin_unlock_irqrestore(&lock, flags);
}
static void shirq_irq_unmask(unsigned irq)
{
struct spear_shirq *shirq = get_irq_chip_data(irq);
u32 val, id = irq - shirq->dev_config[0].virq;
unsigned long flags;
if ((shirq->regs.enb_reg == -1) || shirq->dev_config[id].enb_mask == -1)
return;
spin_lock_irqsave(&lock, flags);
val = readl(shirq->regs.base + shirq->regs.enb_reg);
if (shirq->regs.reset_to_enb)
val &= ~(shirq->dev_config[id].enb_mask);
else
val |= shirq->dev_config[id].enb_mask;
writel(val, shirq->regs.base + shirq->regs.enb_reg);
spin_unlock_irqrestore(&lock, flags);
}
static struct irq_chip shirq_chip = {
.name = "spear_shirq",
.ack = shirq_irq_mask,
.mask = shirq_irq_mask,
.unmask = shirq_irq_unmask,
};
static void shirq_handler(unsigned irq, struct irq_desc *desc)
{
u32 i, val, mask;
struct spear_shirq *shirq = get_irq_data(irq);
desc->chip->ack(irq);
while ((val = readl(shirq->regs.base + shirq->regs.status_reg) &
shirq->regs.status_reg_mask)) {
for (i = 0; (i < shirq->dev_count) && val; i++) {
if (!(shirq->dev_config[i].status_mask & val))
continue;
generic_handle_irq(shirq->dev_config[i].virq);
/* clear interrupt */
val &= ~shirq->dev_config[i].status_mask;
if ((shirq->regs.clear_reg == -1) ||
shirq->dev_config[i].clear_mask == -1)
continue;
mask = readl(shirq->regs.base + shirq->regs.clear_reg);
if (shirq->regs.reset_to_clear)
mask &= ~shirq->dev_config[i].clear_mask;
else
mask |= shirq->dev_config[i].clear_mask;
writel(mask, shirq->regs.base + shirq->regs.clear_reg);
}
}
desc->chip->unmask(irq);
}
int spear_shirq_register(struct spear_shirq *shirq)
{
int i;
if (!shirq || !shirq->dev_config || !shirq->regs.base)
return -EFAULT;
if (!shirq->dev_count)
return -EINVAL;
set_irq_chained_handler(shirq->irq, shirq_handler);
for (i = 0; i < shirq->dev_count; i++) {
set_irq_chip(shirq->dev_config[i].virq, &shirq_chip);
set_irq_handler(shirq->dev_config[i].virq, handle_simple_irq);
set_irq_flags(shirq->dev_config[i].virq, IRQF_VALID);
set_irq_chip_data(shirq->dev_config[i].virq, shirq);
}
set_irq_data(shirq->irq, shirq);
return 0;
}