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x86: ia32_pci: add options to allow I2C IRQ trigger

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Add Kconfig option to specify how interrupt is triggered for I2C.

Change-Id: I5f5afdf6bfc2adbfc2f66bdc1f58bd3a8fc60ecf
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2015-09-10 14:25:30 -07:00 • committed by Anas Nashif
commit e495f95a43
3 changed files with 58 additions and 0 deletions
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27
arch/x86/platforms/ia32_pci/Kconfig
View file

@ -77,6 +77,33 @@ config DW_I2C0_INT_PRIORITY
help
IRQ priority
choice
depends on DW_I2C0
prompt "I2C0 IRQ Trigger Condition"
default DW_I2C0_IRQ_RISING_EDGE
config DW_I2C0_IRQ_FALLING_EDGE
bool "Falling Edge"
help
This option signifies that the I2C0 uses falling edge interrupt.
config DW_I2C0_IRQ_RISING_EDGE
bool "Rising Edge"
help
This option signifies that the I2C0 uses rising edge interrupt.
config DW_I2C0_IRQ_LEVEL_HIGH
bool "Level High"
help
This option signifies that the I2C0 uses level high interrupt.
config DW_I2C0_IRQ_LEVEL_LOW
bool "Level Low"
help
This option signifies that the I2C0 uses level low interrupt.
endchoice
config DW_I2C0_BUS
int "PCI Bus number"
depends on DW_I2C0 && PCI

16
arch/x86/platforms/ia32_pci/board.h
View file

@ -114,6 +114,22 @@ extern struct device * const uart_devs[];
#endif /* CONFIG_BLUETOOTH_UART */
#ifdef CONFIG_DW_I2C0
#include <drivers/ioapic.h>
#if defined(CONFIG_DW_I2C0_IRQ_FALLING_EDGE)
#define DW_I2C0_IRQ_IOAPIC_FLAGS (IOAPIC_EDGE | IOAPIC_LOW)
#elif defined(CONFIG_DW_I2C0_IRQ_RISING_EDGE)
#define DW_I2C0_IRQ_IOAPIC_FLAGS (IOAPIC_EDGE | IOAPIC_HIGH)
#elif defined(CONFIG_DW_I2C0_IRQ_LEVEL_HIGH)
#define DW_I2C0_IRQ_IOAPIC_FLAGS (IOAPIC_LEVEL | IOAPIC_HIGH)
#elif defined(CONFIG_DW_I2C0_IRQ_LEVEL_LOW)
#define DW_I2C0_IRQ_IOAPIC_FLAGS (IOAPIC_LEVEL | IOAPIC_LOW)
#endif
#endif /* CONFIG_DW_I2C0 */
/*
* The irq_connect() API connects to a (virtualized) IRQ and the
* associated interrupt controller is programmed with the allocated vector.

15
arch/x86/platforms/ia32_pci/system.c
View file

@ -110,6 +110,19 @@ static inline void console_irq_set(void)
} while ((0))
#endif
#ifdef CONFIG_DW_I2C0
static inline void dw_i2c0_irq_set(void)
{
_ioapic_irq_set(CONFIG_DW_I2C0_IRQ,
CONFIG_DW_I2C0_IRQ + INT_VEC_IRQ0,
DW_I2C0_IRQ_IOAPIC_FLAGS);
}
#else
#define dw_i2c0_irq_set() \
do { /* nothing */ \
} while ((0))
#endif /* CONFIG_DW_I2C0 */
/**
*
* @brief Perform basic hardware initialization
@ -131,6 +144,8 @@ static int ia32_pci_init(struct device *arg)
hpet_irq_set(); /* NOP if not needed */
console_irq_set(); /* NOP if not needed */
dw_i2c0_irq_set(); /* NOP if not needed */
#if defined(CONFIG_PCI_DEBUG) && defined(CONFIG_PCI_ENUMERATION)
/* Rescan PCI and display the list of PCI attached devices */
struct pci_dev_info info = {