| /* |
| * arch/arm/mach-ixp23xx/ixdp2351.c |
| * |
| * IXDP2351 board-specific routines |
| * |
| * Author: Deepak Saxena <dsaxena@plexity.net> |
| * |
| * Copyright 2005 (c) MontaVista Software, Inc. |
| * |
| * Based on 2.4 code Copyright 2004 (c) Intel Corporation |
| * |
| * This file is licensed under the terms of the GNU General Public |
| * License version 2. This program is licensed "as is" without any |
| * warranty of any kind, whether express or implied. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/spinlock.h> |
| #include <linux/sched.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/serial.h> |
| #include <linux/tty.h> |
| #include <linux/bitops.h> |
| #include <linux/ioport.h> |
| #include <linux/serial_8250.h> |
| #include <linux/serial_core.h> |
| #include <linux/device.h> |
| #include <linux/mm.h> |
| #include <linux/pci.h> |
| #include <linux/mtd/physmap.h> |
| |
| #include <asm/types.h> |
| #include <asm/setup.h> |
| #include <asm/memory.h> |
| #include <mach/hardware.h> |
| #include <asm/mach-types.h> |
| #include <asm/system.h> |
| #include <asm/tlbflush.h> |
| #include <asm/pgtable.h> |
| |
| #include <asm/mach/map.h> |
| #include <asm/mach/irq.h> |
| #include <asm/mach/arch.h> |
| #include <asm/mach/pci.h> |
| |
| /* |
| * IXDP2351 Interrupt Handling |
| */ |
| static void ixdp2351_inta_mask(unsigned int irq) |
| { |
| *IXDP2351_CPLD_INTA_MASK_SET_REG = IXDP2351_INTA_IRQ_MASK(irq); |
| } |
| |
| static void ixdp2351_inta_unmask(unsigned int irq) |
| { |
| *IXDP2351_CPLD_INTA_MASK_CLR_REG = IXDP2351_INTA_IRQ_MASK(irq); |
| } |
| |
| static void ixdp2351_inta_handler(unsigned int irq, struct irq_desc *desc) |
| { |
| u16 ex_interrupt = |
| *IXDP2351_CPLD_INTA_STAT_REG & IXDP2351_INTA_IRQ_VALID; |
| int i; |
| |
| desc->chip->mask(irq); |
| |
| for (i = 0; i < IXDP2351_INTA_IRQ_NUM; i++) { |
| if (ex_interrupt & (1 << i)) { |
| int cpld_irq = |
| IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + i); |
| generic_handle_irq(cpld_irq); |
| } |
| } |
| |
| desc->chip->unmask(irq); |
| } |
| |
| static struct irq_chip ixdp2351_inta_chip = { |
| .ack = ixdp2351_inta_mask, |
| .mask = ixdp2351_inta_mask, |
| .unmask = ixdp2351_inta_unmask |
| }; |
| |
| static void ixdp2351_intb_mask(unsigned int irq) |
| { |
| *IXDP2351_CPLD_INTB_MASK_SET_REG = IXDP2351_INTB_IRQ_MASK(irq); |
| } |
| |
| static void ixdp2351_intb_unmask(unsigned int irq) |
| { |
| *IXDP2351_CPLD_INTB_MASK_CLR_REG = IXDP2351_INTB_IRQ_MASK(irq); |
| } |
| |
| static void ixdp2351_intb_handler(unsigned int irq, struct irq_desc *desc) |
| { |
| u16 ex_interrupt = |
| *IXDP2351_CPLD_INTB_STAT_REG & IXDP2351_INTB_IRQ_VALID; |
| int i; |
| |
| desc->chip->ack(irq); |
| |
| for (i = 0; i < IXDP2351_INTB_IRQ_NUM; i++) { |
| if (ex_interrupt & (1 << i)) { |
| int cpld_irq = |
| IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + i); |
| generic_handle_irq(cpld_irq); |
| } |
| } |
| |
| desc->chip->unmask(irq); |
| } |
| |
| static struct irq_chip ixdp2351_intb_chip = { |
| .ack = ixdp2351_intb_mask, |
| .mask = ixdp2351_intb_mask, |
| .unmask = ixdp2351_intb_unmask |
| }; |
| |
| void __init ixdp2351_init_irq(void) |
| { |
| int irq; |
| |
| /* Mask all interrupts from CPLD, disable simulation */ |
| *IXDP2351_CPLD_INTA_MASK_SET_REG = (u16) -1; |
| *IXDP2351_CPLD_INTB_MASK_SET_REG = (u16) -1; |
| *IXDP2351_CPLD_INTA_SIM_REG = 0; |
| *IXDP2351_CPLD_INTB_SIM_REG = 0; |
| |
| ixp23xx_init_irq(); |
| |
| for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE); |
| irq < |
| IXP23XX_MACH_IRQ(IXDP2351_INTA_IRQ_BASE + IXDP2351_INTA_IRQ_NUM); |
| irq++) { |
| if (IXDP2351_INTA_IRQ_MASK(irq) & IXDP2351_INTA_IRQ_VALID) { |
| set_irq_flags(irq, IRQF_VALID); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_chip(irq, &ixdp2351_inta_chip); |
| } |
| } |
| |
| for (irq = IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE); |
| irq < |
| IXP23XX_MACH_IRQ(IXDP2351_INTB_IRQ_BASE + IXDP2351_INTB_IRQ_NUM); |
| irq++) { |
| if (IXDP2351_INTB_IRQ_MASK(irq) & IXDP2351_INTB_IRQ_VALID) { |
| set_irq_flags(irq, IRQF_VALID); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_chip(irq, &ixdp2351_intb_chip); |
| } |
| } |
| |
| set_irq_chained_handler(IRQ_IXP23XX_INTA, ixdp2351_inta_handler); |
| set_irq_chained_handler(IRQ_IXP23XX_INTB, ixdp2351_intb_handler); |
| } |
| |
| /* |
| * IXDP2351 PCI |
| */ |
| |
| /* |
| * This board does not do normal PCI IRQ routing, or any |
| * sort of swizzling, so we just need to check where on the |
| * bus the device is and figure out what CPLD pin it is |
| * being routed to. |
| */ |
| #define DEVPIN(dev, pin) ((pin) | ((dev) << 3)) |
| |
| static int __init ixdp2351_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) |
| 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 bridge */ |
| case 0x0008: |
| if (tmp_bus == dev->bus) { |
| /* Device is located directy after first bridge */ |
| switch (devpin) { |
| /* Onboard 82546 */ |
| case DEVPIN(1, 1): /* Onboard 82546 ch 0 */ |
| return IRQ_IXDP2351_INTA_82546; |
| case DEVPIN(1, 2): /* Onboard 82546 ch 1 */ |
| return IRQ_IXDP2351_INTB_82546; |
| /* PMC SLOT */ |
| case DEVPIN(0, 1): /* PMCP INTA# */ |
| case DEVPIN(2, 4): /* PMCS INTD# */ |
| return IRQ_IXDP2351_SPCI_PMC_INTA; |
| case DEVPIN(0, 2): /* PMCP INTB# */ |
| case DEVPIN(2, 1): /* PMCS INTA# */ |
| return IRQ_IXDP2351_SPCI_PMC_INTB; |
| case DEVPIN(0, 3): /* PMCP INTC# */ |
| case DEVPIN(2, 2): /* PMCS INTB# */ |
| return IRQ_IXDP2351_SPCI_PMC_INTC; |
| case DEVPIN(0, 4): /* PMCP INTD# */ |
| case DEVPIN(2, 3): /* PMCS INTC# */ |
| return IRQ_IXDP2351_SPCI_PMC_INTD; |
| } |
| } else { |
| /* Device is located indirectly after first bridge */ |
| /* Not supported now */ |
| return -1; |
| } |
| break; |
| case 0x0010: |
| if (tmp_bus == dev->bus) { |
| /* Device is located directy after second bridge */ |
| /* Secondary bus of second bridge */ |
| switch (devpin) { |
| case DEVPIN(0, 1): /* DB#0 */ |
| case DEVPIN(0, 2): |
| case DEVPIN(0, 3): |
| case DEVPIN(0, 4): |
| return IRQ_IXDP2351_SPCI_DB_0; |
| case DEVPIN(1, 1): /* DB#1 */ |
| case DEVPIN(1, 2): |
| case DEVPIN(1, 3): |
| case DEVPIN(1, 4): |
| return IRQ_IXDP2351_SPCI_DB_1; |
| case DEVPIN(2, 1): /* FIC1 */ |
| case DEVPIN(2, 2): |
| case DEVPIN(2, 3): |
| case DEVPIN(2, 4): |
| case DEVPIN(3, 1): /* FIC2 */ |
| case DEVPIN(3, 2): |
| case DEVPIN(3, 3): |
| case DEVPIN(3, 4): |
| return IRQ_IXDP2351_SPCI_FIC; |
| } |
| } else { |
| /* Device is located indirectly after second bridge */ |
| /* Not supported now */ |
| return -1; |
| } |
| break; |
| } |
| |
| return -1; |
| } |
| |
| struct hw_pci ixdp2351_pci __initdata = { |
| .nr_controllers = 1, |
| .preinit = ixp23xx_pci_preinit, |
| .setup = ixp23xx_pci_setup, |
| .scan = ixp23xx_pci_scan_bus, |
| .map_irq = ixdp2351_map_irq, |
| }; |
| |
| int __init ixdp2351_pci_init(void) |
| { |
| if (machine_is_ixdp2351()) |
| pci_common_init(&ixdp2351_pci); |
| |
| return 0; |
| } |
| |
| subsys_initcall(ixdp2351_pci_init); |
| |
| /* |
| * IXDP2351 Static Mapped I/O |
| */ |
| static struct map_desc ixdp2351_io_desc[] __initdata = { |
| { |
| .virtual = IXDP2351_NP_VIRT_BASE, |
| .pfn = __phys_to_pfn((u64)IXDP2351_NP_PHYS_BASE), |
| .length = IXDP2351_NP_PHYS_SIZE, |
| .type = MT_DEVICE |
| }, { |
| .virtual = IXDP2351_BB_BASE_VIRT, |
| .pfn = __phys_to_pfn((u64)IXDP2351_BB_BASE_PHYS), |
| .length = IXDP2351_BB_SIZE, |
| .type = MT_DEVICE |
| } |
| }; |
| |
| static void __init ixdp2351_map_io(void) |
| { |
| ixp23xx_map_io(); |
| iotable_init(ixdp2351_io_desc, ARRAY_SIZE(ixdp2351_io_desc)); |
| } |
| |
| static struct physmap_flash_data ixdp2351_flash_data = { |
| .width = 1, |
| }; |
| |
| static struct resource ixdp2351_flash_resource = { |
| .start = 0x90000000, |
| .end = 0x93ffffff, |
| .flags = IORESOURCE_MEM, |
| }; |
| |
| static struct platform_device ixdp2351_flash = { |
| .name = "physmap-flash", |
| .id = 0, |
| .dev = { |
| .platform_data = &ixdp2351_flash_data, |
| }, |
| .num_resources = 1, |
| .resource = &ixdp2351_flash_resource, |
| }; |
| |
| static void __init ixdp2351_init(void) |
| { |
| platform_device_register(&ixdp2351_flash); |
| |
| /* |
| * Mark flash as writeable |
| */ |
| IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE; |
| IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE; |
| IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE; |
| IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE; |
| |
| ixp23xx_sys_init(); |
| } |
| |
| MACHINE_START(IXDP2351, "Intel IXDP2351 Development Platform") |
| /* Maintainer: MontaVista Software, Inc. */ |
| .map_io = ixdp2351_map_io, |
| .init_irq = ixdp2351_init_irq, |
| .timer = &ixp23xx_timer, |
| .boot_params = 0x00000100, |
| .init_machine = ixdp2351_init, |
| MACHINE_END |