/* * 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/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/delay.h> #include <linux/serial.h> #include <linux/tty.h> #include <linux/serial_core.h> #include <linux/platform_device.h> #include <linux/serial_8250.h> #include <linux/io.h> #include <asm/irq.h> #include <asm/pgtable.h> #include <asm/page.h> #include <asm/system.h> #include <mach/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(struct irq_data *d) { ixp2000_reg_wrb(IXDP2X01_INT_MASK_SET_REG, IXP2000_BOARD_IRQ_MASK(d->irq)); } static void ixdp2x01_irq_unmask(struct irq_data *d) { ixp2000_reg_write(IXDP2X01_INT_MASK_CLR_REG, IXP2000_BOARD_IRQ_MASK(d->irq)); } static u32 valid_irq_mask; static void ixdp2x01_irq_handler(unsigned int irq, struct irq_desc *desc) { u32 ex_interrupt; int i; desc->irq_data.chip->irq_mask(&desc->irq_data); 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)) { int cpld_irq = IXP2000_BOARD_IRQ(0) + i; generic_handle_irq(cpld_irq); } } desc->irq_data.chip->irq_unmask(&desc->irq_data); } static struct irq_chip ixdp2x01_irq_chip = { .irq_mask = ixdp2x01_irq_mask, .irq_ack = ixdp2x01_irq_mask, .irq_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_wrb(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, handle_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 *************************************************************************/ static struct map_desc ixdp2x01_io_desc __initdata = { .virtual = IXDP2X01_VIRT_CPLD_BASE, .pfn = __phys_to_pfn(IXDP2X01_PHYS_CPLD_BASE), .length = IXDP2X01_CPLD_REGION_SIZE, .type = MT_DEVICE }; static void __init ixdp2x01_map_io(void) { ixp2000_map_io(); iotable_init(&ixdp2x01_io_desc, 1); } /************************************************************************* * IXDP2x01 serial ports *************************************************************************/ static struct plat_serial8250_port ixdp2x01_serial_port1[] = { { .mapbase = (unsigned long)IXDP2X01_UART1_PHYS_BASE, .membase = (char *)IXDP2X01_UART1_VIRT_BASE, .irq = IRQ_IXDP2X01_UART1, .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, .iotype = UPIO_MEM32, .regshift = 2, .uartclk = IXDP2X01_UART_CLK, }, { } }; static struct resource ixdp2x01_uart_resource1 = { .start = IXDP2X01_UART1_PHYS_BASE, .end = IXDP2X01_UART1_PHYS_BASE + 0xffff, .flags = IORESOURCE_MEM, }; static struct platform_device ixdp2x01_serial_device1 = { .name = "serial8250", .id = PLAT8250_DEV_PLATFORM1, .dev = { .platform_data = ixdp2x01_serial_port1, }, .num_resources = 1, .resource = &ixdp2x01_uart_resource1, }; static struct plat_serial8250_port ixdp2x01_serial_port2[] = { { .mapbase = (unsigned long)IXDP2X01_UART2_PHYS_BASE, .membase = (char *)IXDP2X01_UART2_VIRT_BASE, .irq = IRQ_IXDP2X01_UART2, .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, .iotype = UPIO_MEM32, .regshift = 2, .uartclk = IXDP2X01_UART_CLK, }, { } }; static struct resource ixdp2x01_uart_resource2 = { .start = IXDP2X01_UART2_PHYS_BASE, .end = IXDP2X01_UART2_PHYS_BASE + 0xffff, .flags = IORESOURCE_MEM, }; static struct platform_device ixdp2x01_serial_device2 = { .name = "serial8250", .id = PLAT8250_DEV_PLATFORM2, .dev = { .platform_data = ixdp2x01_serial_port2, }, .num_resources = 1, .resource = &ixdp2x01_uart_resource2, }; static void ixdp2x01_uart_init(void) { platform_device_register(&ixdp2x01_serial_device1); platform_device_register(&ixdp2x01_serial_device2); } /************************************************************************* * 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(); pcibios_setup("firmware"); } #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 directly 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 directly 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() || machine_is_ixdp28x5()) 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) { if (machine_is_ixdp2401() || machine_is_ixdp2801() ||\ machine_is_ixdp28x5()) pci_common_init(&ixdp2x01_pci); return 0; } subsys_initcall(ixdp2x01_pci_init); /************************************************************************* * IXDP2x01 Machine Initialization *************************************************************************/ 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_wrb(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_wrb(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)); ixp2000_uart_init(); ixdp2x01_uart_init(); } #ifdef CONFIG_ARCH_IXDP2401 MACHINE_START(IXDP2401, "Intel IXDP2401 Development Platform") /* Maintainer: MontaVista Software, Inc. */ .boot_params = 0x00000100, .map_io = ixdp2x01_map_io, .init_irq = 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_params = 0x00000100, .map_io = ixdp2x01_map_io, .init_irq = ixdp2x01_init_irq, .timer = &ixdp2x01_timer, .init_machine = ixdp2x01_init_machine, MACHINE_END /* * IXDP28x5 is basically an IXDP2801 with a different CPU but Intel * changed the machine ID in the bootloader */ MACHINE_START(IXDP28X5, "Intel IXDP2805/2855 Development Platform") /* Maintainer: MontaVista Software, Inc. */ .boot_params = 0x00000100, .map_io = ixdp2x01_map_io, .init_irq = ixdp2x01_init_irq, .timer = &ixdp2x01_timer, .init_machine = ixdp2x01_init_machine, MACHINE_END #endif