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Diffstat (limited to 'arch/arm/mach-ixp2000/ixdp2x01.c')
-rw-r--r--arch/arm/mach-ixp2000/ixdp2x01.c400
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diff --git a/arch/arm/mach-ixp2000/ixdp2x01.c b/arch/arm/mach-ixp2000/ixdp2x01.c
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index 000000000000..e94dace3d412
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+++ b/arch/arm/mach-ixp2000/ixdp2x01.c
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+/*
+ * arch/arm/mach-ixp2000/ixdp2x01.c
+ *
+ * Code common to Intel IXDP2401 and IXDP2801 platforms
+ *
+ * Original Author: Andrzej Mialkowski <andrzej.mialkowski@intel.com>
+ * Maintainer: Deepak Saxena <dsaxena@plexity.net>
+ *
+ * Copyright (C) 2002-2003 Intel Corp.
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/serial.h>
+#include <linux/tty.h>
+#include <linux/serial_core.h>
+#include <linux/device.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/system.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+
+#include <asm/mach/pci.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/time.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+
+/*************************************************************************
+ * IXDP2x01 IRQ Handling
+ *************************************************************************/
+static void ixdp2x01_irq_mask(unsigned int irq)
+{
+ ixp2000_reg_write(IXDP2X01_INT_MASK_SET_REG,
+ IXP2000_BOARD_IRQ_MASK(irq));
+}
+
+static void ixdp2x01_irq_unmask(unsigned int irq)
+{
+ ixp2000_reg_write(IXDP2X01_INT_MASK_CLR_REG,
+ IXP2000_BOARD_IRQ_MASK(irq));
+}
+
+static u32 valid_irq_mask;
+
+static void ixdp2x01_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
+{
+ u32 ex_interrupt;
+ int i;
+
+ desc->chip->mask(irq);
+
+ ex_interrupt = *IXDP2X01_INT_STAT_REG & valid_irq_mask;
+
+ if (!ex_interrupt) {
+ printk(KERN_ERR "Spurious IXDP2X01 CPLD interrupt!\n");
+ return;
+ }
+
+ for (i = 0; i < IXP2000_BOARD_IRQS; i++) {
+ if (ex_interrupt & (1 << i)) {
+ struct irqdesc *cpld_desc;
+ int cpld_irq = IXP2000_BOARD_IRQ(0) + i;
+ cpld_desc = irq_desc + cpld_irq;
+ cpld_desc->handle(cpld_irq, cpld_desc, regs);
+ }
+ }
+
+ desc->chip->unmask(irq);
+}
+
+static struct irqchip ixdp2x01_irq_chip = {
+ .mask = ixdp2x01_irq_mask,
+ .ack = ixdp2x01_irq_mask,
+ .unmask = ixdp2x01_irq_unmask
+};
+
+/*
+ * We only do anything if we are the master NPU on the board.
+ * The slave NPU only has the ethernet chip going directly to
+ * the PCIB interrupt input.
+ */
+void __init ixdp2x01_init_irq(void)
+{
+ int irq = 0;
+
+ /* initialize chip specific interrupts */
+ ixp2000_init_irq();
+
+ if (machine_is_ixdp2401())
+ valid_irq_mask = IXDP2401_VALID_IRQ_MASK;
+ else
+ valid_irq_mask = IXDP2801_VALID_IRQ_MASK;
+
+ /* Mask all interrupts from CPLD, disable simulation */
+ ixp2000_reg_write(IXDP2X01_INT_MASK_SET_REG, 0xffffffff);
+ ixp2000_reg_write(IXDP2X01_INT_SIM_REG, 0);
+
+ for (irq = NR_IXP2000_IRQS; irq < NR_IXDP2X01_IRQS; irq++) {
+ if (irq & valid_irq_mask) {
+ set_irq_chip(irq, &ixdp2x01_irq_chip);
+ set_irq_handler(irq, do_level_IRQ);
+ set_irq_flags(irq, IRQF_VALID);
+ } else {
+ set_irq_flags(irq, 0);
+ }
+ }
+
+ /* Hook into PCI interrupts */
+ set_irq_chained_handler(IRQ_IXP2000_PCIB, &ixdp2x01_irq_handler);
+}
+
+
+/*************************************************************************
+ * IXDP2x01 memory map and serial ports
+ *************************************************************************/
+static struct map_desc ixdp2x01_io_desc __initdata = {
+ .virtual = IXDP2X01_VIRT_CPLD_BASE,
+ .physical = IXDP2X01_PHYS_CPLD_BASE,
+ .length = IXDP2X01_CPLD_REGION_SIZE,
+ .type = MT_DEVICE
+};
+
+static struct uart_port ixdp2x01_serial_ports[2] = {
+ {
+ .membase = (char *)(IXDP2X01_UART1_VIRT_BASE),
+ .mapbase = (unsigned long)IXDP2X01_UART1_PHYS_BASE,
+ .irq = IRQ_IXDP2X01_UART1,
+ .flags = UPF_SKIP_TEST,
+ .iotype = UPIO_MEM32,
+ .regshift = 2,
+ .uartclk = IXDP2X01_UART_CLK,
+ .line = 1,
+ .type = PORT_16550A,
+ .fifosize = 16
+ }, {
+ .membase = (char *)(IXDP2X01_UART2_VIRT_BASE),
+ .mapbase = (unsigned long)IXDP2X01_UART2_PHYS_BASE,
+ .irq = IRQ_IXDP2X01_UART2,
+ .flags = UPF_SKIP_TEST,
+ .iotype = UPIO_MEM32,
+ .regshift = 2,
+ .uartclk = IXDP2X01_UART_CLK,
+ .line = 2,
+ .type = PORT_16550A,
+ .fifosize = 16
+ },
+};
+
+static void __init ixdp2x01_map_io(void)
+{
+ ixp2000_map_io();
+
+ iotable_init(&ixdp2x01_io_desc, 1);
+
+ early_serial_setup(&ixdp2x01_serial_ports[0]);
+ early_serial_setup(&ixdp2x01_serial_ports[1]);
+}
+
+
+/*************************************************************************
+ * IXDP2x01 timer tick configuration
+ *************************************************************************/
+static unsigned int ixdp2x01_clock;
+
+static int __init ixdp2x01_clock_setup(char *str)
+{
+ ixdp2x01_clock = simple_strtoul(str, NULL, 10);
+
+ return 1;
+}
+
+__setup("ixdp2x01_clock=", ixdp2x01_clock_setup);
+
+static void __init ixdp2x01_timer_init(void)
+{
+ if (!ixdp2x01_clock)
+ ixdp2x01_clock = 50000000;
+
+ ixp2000_init_time(ixdp2x01_clock);
+}
+
+static struct sys_timer ixdp2x01_timer = {
+ .init = ixdp2x01_timer_init,
+ .offset = ixp2000_gettimeoffset,
+};
+
+/*************************************************************************
+ * IXDP2x01 PCI
+ *************************************************************************/
+void __init ixdp2x01_pci_preinit(void)
+{
+ ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00000000);
+ ixp2000_pci_preinit();
+}
+
+#define DEVPIN(dev, pin) ((pin) | ((dev) << 3))
+
+static int __init ixdp2x01_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+ u8 bus = dev->bus->number;
+ u32 devpin = DEVPIN(PCI_SLOT(dev->devfn), pin);
+ struct pci_bus *tmp_bus = dev->bus;
+
+ /* Primary bus, no interrupts here */
+ if (bus == 0) {
+ return -1;
+ }
+
+ /* Lookup first leaf in bus tree */
+ while ((tmp_bus->parent != NULL) && (tmp_bus->parent->parent != NULL)) {
+ tmp_bus = tmp_bus->parent;
+ }
+
+ /* Select between known bridges */
+ switch (tmp_bus->self->devfn | (tmp_bus->self->bus->number << 8)) {
+ /* Device is located after first MB bridge */
+ case 0x0008:
+ if (tmp_bus == dev->bus) {
+ /* Device is located directy after first MB bridge */
+ switch (devpin) {
+ case DEVPIN(1, 1): /* Onboard 82546 ch 0 */
+ if (machine_is_ixdp2401())
+ return IRQ_IXDP2401_INTA_82546;
+ return -1;
+ case DEVPIN(1, 2): /* Onboard 82546 ch 1 */
+ if (machine_is_ixdp2401())
+ return IRQ_IXDP2401_INTB_82546;
+ return -1;
+ case DEVPIN(0, 1): /* PMC INTA# */
+ return IRQ_IXDP2X01_SPCI_PMC_INTA;
+ case DEVPIN(0, 2): /* PMC INTB# */
+ return IRQ_IXDP2X01_SPCI_PMC_INTB;
+ case DEVPIN(0, 3): /* PMC INTC# */
+ return IRQ_IXDP2X01_SPCI_PMC_INTC;
+ case DEVPIN(0, 4): /* PMC INTD# */
+ return IRQ_IXDP2X01_SPCI_PMC_INTD;
+ }
+ }
+ break;
+ case 0x0010:
+ if (tmp_bus == dev->bus) {
+ /* Device is located directy after second MB bridge */
+ /* Secondary bus of second bridge */
+ switch (devpin) {
+ case DEVPIN(0, 1): /* DB#0 */
+ return IRQ_IXDP2X01_SPCI_DB_0;
+ case DEVPIN(1, 1): /* DB#1 */
+ return IRQ_IXDP2X01_SPCI_DB_1;
+ }
+ } else {
+ /* Device is located indirectly after second MB bridge */
+ /* Not supported now */
+ }
+ break;
+ }
+
+ return -1;
+}
+
+
+static int ixdp2x01_pci_setup(int nr, struct pci_sys_data *sys)
+{
+ sys->mem_offset = 0xe0000000;
+
+ if (machine_is_ixdp2801())
+ sys->mem_offset -= ((*IXP2000_PCI_ADDR_EXT & 0xE000) << 16);
+
+ return ixp2000_pci_setup(nr, sys);
+}
+
+struct hw_pci ixdp2x01_pci __initdata = {
+ .nr_controllers = 1,
+ .setup = ixdp2x01_pci_setup,
+ .preinit = ixdp2x01_pci_preinit,
+ .scan = ixp2000_pci_scan_bus,
+ .map_irq = ixdp2x01_pci_map_irq,
+};
+
+int __init ixdp2x01_pci_init(void)
+{
+
+ pci_common_init(&ixdp2x01_pci);
+ return 0;
+}
+
+subsys_initcall(ixdp2x01_pci_init);
+
+/*************************************************************************
+ * IXDP2x01 Machine Intialization
+ *************************************************************************/
+static struct flash_platform_data ixdp2x01_flash_platform_data = {
+ .map_name = "cfi_probe",
+ .width = 1,
+};
+
+static unsigned long ixdp2x01_flash_bank_setup(unsigned long ofs)
+{
+ ixp2000_reg_write(IXDP2X01_CPLD_FLASH_REG,
+ ((ofs >> IXDP2X01_FLASH_WINDOW_BITS) | IXDP2X01_CPLD_FLASH_INTERN));
+ return (ofs & IXDP2X01_FLASH_WINDOW_MASK);
+}
+
+static struct ixp2000_flash_data ixdp2x01_flash_data = {
+ .platform_data = &ixdp2x01_flash_platform_data,
+ .bank_setup = ixdp2x01_flash_bank_setup
+};
+
+static struct resource ixdp2x01_flash_resource = {
+ .start = 0xc4000000,
+ .end = 0xc4000000 + 0x01ffffff,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device ixdp2x01_flash = {
+ .name = "IXP2000-Flash",
+ .id = 0,
+ .dev = {
+ .platform_data = &ixdp2x01_flash_data,
+ },
+ .num_resources = 1,
+ .resource = &ixdp2x01_flash_resource,
+};
+
+static struct ixp2000_i2c_pins ixdp2x01_i2c_gpio_pins = {
+ .sda_pin = IXDP2X01_GPIO_SDA,
+ .scl_pin = IXDP2X01_GPIO_SCL,
+};
+
+static struct platform_device ixdp2x01_i2c_controller = {
+ .name = "IXP2000-I2C",
+ .id = 0,
+ .dev = {
+ .platform_data = &ixdp2x01_i2c_gpio_pins,
+ },
+ .num_resources = 0
+};
+
+static struct platform_device *ixdp2x01_devices[] __initdata = {
+ &ixdp2x01_flash,
+ &ixdp2x01_i2c_controller
+};
+
+static void __init ixdp2x01_init_machine(void)
+{
+ ixp2000_reg_write(IXDP2X01_CPLD_FLASH_REG,
+ (IXDP2X01_CPLD_FLASH_BANK_MASK | IXDP2X01_CPLD_FLASH_INTERN));
+
+ ixdp2x01_flash_data.nr_banks =
+ ((*IXDP2X01_CPLD_FLASH_REG & IXDP2X01_CPLD_FLASH_BANK_MASK) + 1);
+
+ platform_add_devices(ixdp2x01_devices, ARRAY_SIZE(ixdp2x01_devices));
+}
+
+
+#ifdef CONFIG_ARCH_IXDP2401
+MACHINE_START(IXDP2401, "Intel IXDP2401 Development Platform")
+ MAINTAINER("MontaVista Software, Inc.")
+ BOOT_MEM(0x00000000, IXP2000_UART_PHYS_BASE, IXP2000_UART_VIRT_BASE)
+ BOOT_PARAMS(0x00000100)
+ MAPIO(ixdp2x01_map_io)
+ INITIRQ(ixdp2x01_init_irq)
+ .timer = &ixdp2x01_timer,
+ INIT_MACHINE(ixdp2x01_init_machine)
+MACHINE_END
+#endif
+
+#ifdef CONFIG_ARCH_IXDP2801
+MACHINE_START(IXDP2801, "Intel IXDP2801 Development Platform")
+ MAINTAINER("MontaVista Software, Inc.")
+ BOOT_MEM(0x00000000, IXP2000_UART_PHYS_BASE, IXP2000_UART_VIRT_BASE)
+ BOOT_PARAMS(0x00000100)
+ MAPIO(ixdp2x01_map_io)
+ INITIRQ(ixdp2x01_init_irq)
+ .timer = &ixdp2x01_timer,
+ INIT_MACHINE(ixdp2x01_init_machine)
+MACHINE_END
+#endif
+
+