#include <linux/init.h>
#include <linux/clk.h>
#include <linux/irq.h>
+#include <linux/gpio.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
MX31_PIN_CTS1__CTS1,
MX31_PIN_RTS1__RTS1,
MX31_PIN_TXD1__TXD1,
- MX31_PIN_RXD1__RXD1
+ MX31_PIN_RXD1__RXD1,
+ IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO),
};
static struct imxuart_platform_data uart_pdata = {
.flags = IMXUART_HAVE_RTSCTS,
};
+/*
+ * Routines for the CPLD on the debug board. It contains a CPLD handling
+ * LEDs, switches, interrupts for Ethernet.
+ */
+
+static void mx31pdk_expio_irq_handler(uint32_t irq, struct irq_desc *desc)
+{
+ uint32_t imr_val;
+ uint32_t int_valid;
+ uint32_t expio_irq;
+
+ imr_val = __raw_readw(CPLD_INT_MASK_REG);
+ int_valid = __raw_readw(CPLD_INT_STATUS_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(uint32_t irq)
+{
+ uint16_t reg;
+ uint32_t expio = MXC_IRQ_TO_EXPIO(irq);
+
+ /* mask the interrupt */
+ reg = __raw_readw(CPLD_INT_MASK_REG);
+ reg |= 1 << expio;
+ __raw_writew(reg, CPLD_INT_MASK_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(uint32_t irq)
+{
+ uint32_t expio = MXC_IRQ_TO_EXPIO(irq);
+
+ /* clear the interrupt status */
+ __raw_writew(1 << expio, CPLD_INT_RESET_REG);
+ __raw_writew(0, CPLD_INT_RESET_REG);
+ /* mask the interrupt */
+ expio_mask_irq(irq);
+}
+
+/*
+ * 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(uint32_t irq)
+{
+ uint16_t reg;
+ uint32_t expio = MXC_IRQ_TO_EXPIO(irq);
+
+ /* unmask the interrupt */
+ reg = __raw_readw(CPLD_INT_MASK_REG);
+ reg &= ~(1 << expio);
+ __raw_writew(reg, CPLD_INT_MASK_REG);
+}
+
+static struct irq_chip expio_irq_chip = {
+ .ack = expio_ack_irq,
+ .mask = expio_mask_irq,
+ .unmask = expio_unmask_irq,
+};
+
+static int __init mx31pdk_init_expio(void)
+{
+ int i;
+ int ret;
+
+ /* Check if there's a debug board connected */
+ if ((__raw_readw(CPLD_MAGIC_NUMBER1_REG) != 0xAAAA) ||
+ (__raw_readw(CPLD_MAGIC_NUMBER2_REG) != 0x5555) ||
+ (__raw_readw(CPLD_MAGIC_NUMBER3_REG) != 0xCAFE)) {
+ /* No Debug board found */
+ return -ENODEV;
+ }
+
+ pr_info("i.MX31PDK Debug board detected, rev = 0x%04X\n",
+ __raw_readw(CPLD_CODE_VER_REG));
+
+ /*
+ * Configure INT line as GPIO input
+ */
+ ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1), "sms9217-irq");
+ if (ret)
+ pr_warning("could not get LAN irq gpio\n");
+ else
+ gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_GPIO1_1));
+
+ /* Disable the interrupts and clear the status */
+ __raw_writew(0, CPLD_INT_MASK_REG);
+ __raw_writew(0xFFFF, CPLD_INT_RESET_REG);
+ __raw_writew(0, CPLD_INT_RESET_REG);
+ __raw_writew(0x1F, CPLD_INT_MASK_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_LOW);
+ set_irq_chained_handler(EXPIO_PARENT_INT, mx31pdk_expio_irq_handler);
+
+ return 0;
+}
+
+/*
+ * This structure defines the MX31 memory map.
+ */
+static struct map_desc mx31pdk_io_desc[] __initdata = {
+ {
+ .virtual = SPBA0_BASE_ADDR_VIRT,
+ .pfn = __phys_to_pfn(SPBA0_BASE_ADDR),
+ .length = SPBA0_SIZE,
+ .type = MT_DEVICE_NONSHARED,
+ }, {
+ .virtual = CS5_BASE_ADDR_VIRT,
+ .pfn = __phys_to_pfn(CS5_BASE_ADDR),
+ .length = CS5_SIZE,
+ .type = MT_DEVICE,
+ },
+};
+
+/*
+ * Set up static virtual mappings.
+ */
+static void __init mx31pdk_map_io(void)
+{
+ mx31_map_io();
+ iotable_init(mx31pdk_io_desc, ARRAY_SIZE(mx31pdk_io_desc));
+}
+
/*!
* Board specific initialization.
*/
"mx31pdk");
mxc_register_device(&mxc_uart_device0, &uart_pdata);
+
+ mx31pdk_init_expio();
}
static void __init mx31pdk_timer_init(void)
.phys_io = AIPS1_BASE_ADDR,
.io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
.boot_params = PHYS_OFFSET + 0x100,
- .map_io = mx31_map_io,
+ .map_io = mx31pdk_map_io,
.init_irq = mxc_init_irq,
.init_machine = mxc_board_init,
.timer = &mx31pdk_timer,
#define MXC_LL_UART_PADDR UART1_BASE_ADDR
#define MXC_LL_UART_VADDR AIPS1_IO_ADDRESS(UART1_BASE_ADDR)
+/* Definitions for components on the Debug board */
+
+/* Base address of CPLD controller on the Debug board */
+#define DEBUG_BASE_ADDRESS CS5_IO_ADDRESS(CS5_BASE_ADDR)
+
+/* LAN9217 ethernet base address */
+#define LAN9217_BASE_ADDR CS5_BASE_ADDR
+
+/* CPLD config and interrupt base address */
+#define CPLD_ADDR (DEBUG_BASE_ADDRESS + 0x20000)
+
+/* LED switchs */
+#define CPLD_LED_REG (CPLD_ADDR + 0x00)
+/* buttons */
+#define CPLD_SWITCH_BUTTONS_REG (EXPIO_ADDR + 0x08)
+/* status, interrupt */
+#define CPLD_INT_STATUS_REG (CPLD_ADDR + 0x10)
+#define CPLD_INT_MASK_REG (CPLD_ADDR + 0x38)
+#define CPLD_INT_RESET_REG (CPLD_ADDR + 0x20)
+/* magic word for debug CPLD */
+#define CPLD_MAGIC_NUMBER1_REG (CPLD_ADDR + 0x40)
+#define CPLD_MAGIC_NUMBER2_REG (CPLD_ADDR + 0x48)
+/* CPLD code version */
+#define CPLD_CODE_VER_REG (CPLD_ADDR + 0x50)
+/* magic word for debug CPLD */
+#define CPLD_MAGIC_NUMBER3_REG (CPLD_ADDR + 0x58)
+/* module reset register */
+#define CPLD_MODULE_RESET_REG (CPLD_ADDR + 0x60)
+/* CPU ID and Personality ID */
+#define CPLD_MCU_BOARD_ID_REG (CPLD_ADDR + 0x68)
+
+/* CPLD IRQ line for external uart, external ethernet etc */
+#define EXPIO_PARENT_INT IOMUX_TO_IRQ(MX31_PIN_GPIO1_1)
+
+#define MXC_EXP_IO_BASE (MXC_BOARD_IRQ_START)
+#define MXC_IRQ_TO_EXPIO(irq) ((irq) - MXC_EXP_IO_BASE)
+
+#define EXPIO_INT_ENET (MXC_EXP_IO_BASE + 0)
+#define EXPIO_INT_XUART_A (MXC_EXP_IO_BASE + 1)
+#define EXPIO_INT_XUART_B (MXC_EXP_IO_BASE + 2)
+#define EXPIO_INT_BUTTON_A (MXC_EXP_IO_BASE + 3)
+#define EXPIO_INT_BUTTON_B (MXC_EXP_IO_BASE + 4)
+
+#define MXC_MAX_EXP_IO_LINES 16
+
#endif /* __ASM_ARCH_MXC_BOARD_MX31PDK_H__ */
projects / platform / kernel / linux-starfive.git / commitdiff