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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-10-09 21:33:03 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-10-09 21:33:03 +0100
commitb1add0480a95b6ceaece5caf6c50614771eae9b2 (patch)
tree06f969f37bd0f51d9ebcccdb3e3ae983edaad889 /arch/arm/mach-mx3/mx31ads.c
parent3f30a09a612bac2b531a206c2a58a292dd7ff182 (diff)
parent58a85f465fb16a918a869eba05addb8f78d9e064 (diff)
downloadlinux-linaro-stable-b1add0480a95b6ceaece5caf6c50614771eae9b2.tar.gz
Merge branch 'for-rmk' of git://pasiphae.extern.pengutronix.de/git/imx/linux-2.6.git
Merge branch 'imx-devel' into devel
Diffstat (limited to 'arch/arm/mach-mx3/mx31ads.c')
-rw-r--r--arch/arm/mach-mx3/mx31ads.c114
1 files changed, 113 insertions, 1 deletions
diff --git a/arch/arm/mach-mx3/mx31ads.c b/arch/arm/mach-mx3/mx31ads.c
index 0cd90a9667c8..1be4a390c63f 100644
--- a/arch/arm/mach-mx3/mx31ads.c
+++ b/arch/arm/mach-mx3/mx31ads.c
@@ -22,6 +22,7 @@
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/serial_8250.h>
+#include <linux/irq.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -31,6 +32,8 @@
#include <asm/mach/map.h>
#include <mach/common.h>
#include <mach/board-mx31ads.h>
+#include <mach/imx-uart.h>
+#include <mach/iomux-mx3.h>
/*!
* @file mx31ads.c
@@ -84,6 +87,108 @@ static inline int mxc_init_extuart(void)
}
#endif
+#if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE)
+static struct imxuart_platform_data uart_pdata = {
+ .flags = IMXUART_HAVE_RTSCTS,
+};
+
+static inline void mxc_init_imx_uart(void)
+{
+ mxc_iomux_mode(MX31_PIN_CTS1__CTS1);
+ mxc_iomux_mode(MX31_PIN_RTS1__RTS1);
+ mxc_iomux_mode(MX31_PIN_TXD1__TXD1);
+ mxc_iomux_mode(MX31_PIN_RXD1__RXD1);
+
+ mxc_register_device(&mxc_uart_device0, &uart_pdata);
+}
+#else /* !SERIAL_IMX */
+static inline void mxc_init_imx_uart(void)
+{
+}
+#endif /* !SERIAL_IMX */
+
+static void mx31ads_expio_irq_handler(u32 irq, struct irq_desc *desc)
+{
+ u32 imr_val;
+ u32 int_valid;
+ u32 expio_irq;
+
+ imr_val = __raw_readw(PBC_INTMASK_SET_REG);
+ int_valid = __raw_readw(PBC_INTSTATUS_REG) & imr_val;
+
+ expio_irq = MXC_EXP_IO_BASE;
+ for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
+ if ((int_valid & 1) == 0)
+ continue;
+
+ generic_handle_irq(expio_irq);
+ }
+}
+
+/*
+ * Disable an expio pin's interrupt by setting the bit in the imr.
+ * @param irq an expio virtual irq number
+ */
+static void expio_mask_irq(u32 irq)
+{
+ u32 expio = MXC_IRQ_TO_EXPIO(irq);
+ /* mask the interrupt */
+ __raw_writew(1 << expio, PBC_INTMASK_CLEAR_REG);
+ __raw_readw(PBC_INTMASK_CLEAR_REG);
+}
+
+/*
+ * Acknowledge an expanded io pin's interrupt by clearing the bit in the isr.
+ * @param irq an expanded io virtual irq number
+ */
+static void expio_ack_irq(u32 irq)
+{
+ u32 expio = MXC_IRQ_TO_EXPIO(irq);
+ /* clear the interrupt status */
+ __raw_writew(1 << expio, PBC_INTSTATUS_REG);
+}
+
+/*
+ * Enable a expio pin's interrupt by clearing the bit in the imr.
+ * @param irq a expio virtual irq number
+ */
+static void expio_unmask_irq(u32 irq)
+{
+ u32 expio = MXC_IRQ_TO_EXPIO(irq);
+ /* unmask the interrupt */
+ __raw_writew(1 << expio, PBC_INTMASK_SET_REG);
+}
+
+static struct irq_chip expio_irq_chip = {
+ .ack = expio_ack_irq,
+ .mask = expio_mask_irq,
+ .unmask = expio_unmask_irq,
+};
+
+static void __init mx31ads_init_expio(void)
+{
+ int i;
+
+ printk(KERN_INFO "MX31ADS EXPIO(CPLD) hardware\n");
+
+ /*
+ * Configure INT line as GPIO input
+ */
+ mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_4, IOMUX_CONFIG_GPIO));
+
+ /* disable the interrupt and clear the status */
+ __raw_writew(0xFFFF, PBC_INTMASK_CLEAR_REG);
+ __raw_writew(0xFFFF, PBC_INTSTATUS_REG);
+ for (i = MXC_EXP_IO_BASE; i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES);
+ i++) {
+ set_irq_chip(i, &expio_irq_chip);
+ set_irq_handler(i, handle_level_irq);
+ set_irq_flags(i, IRQF_VALID);
+ }
+ set_irq_type(EXPIO_PARENT_INT, IRQ_TYPE_LEVEL_HIGH);
+ set_irq_chained_handler(EXPIO_PARENT_INT, mx31ads_expio_irq_handler);
+}
+
/*!
* This structure defines static mappings for the i.MX31ADS board.
*/
@@ -120,12 +225,19 @@ void __init mx31ads_map_io(void)
iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc));
}
+void __init mx31ads_init_irq(void)
+{
+ mxc_init_irq();
+ mx31ads_init_expio();
+}
+
/*!
* Board specific initialization.
*/
static void __init mxc_board_init(void)
{
mxc_init_extuart();
+ mxc_init_imx_uart();
}
static void __init mx31ads_timer_init(void)
@@ -148,7 +260,7 @@ MACHINE_START(MX31ADS, "Freescale MX31ADS")
.io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
.boot_params = PHYS_OFFSET + 0x100,
.map_io = mx31ads_map_io,
- .init_irq = mxc_init_irq,
+ .init_irq = mx31ads_init_irq,
.init_machine = mxc_board_init,
.timer = &mx31ads_timer,
MACHINE_END