| /* |
| * linux/arch/arm/mach-clps7500/core.c |
| * |
| * Copyright (C) 1998 Russell King |
| * Copyright (C) 1999 Nexus Electronics Ltd |
| * |
| * Extra MM routines for CL7500 architecture |
| */ |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/list.h> |
| #include <linux/sched.h> |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/serial_8250.h> |
| |
| #include <asm/mach/arch.h> |
| #include <asm/mach/map.h> |
| #include <asm/mach/irq.h> |
| #include <asm/mach/time.h> |
| |
| #include <asm/hardware.h> |
| #include <asm/hardware/iomd.h> |
| #include <asm/io.h> |
| #include <asm/irq.h> |
| #include <asm/mach-types.h> |
| |
| unsigned int vram_size; |
| |
| static void cl7500_ack_irq_a(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << irq; |
| val = iomd_readb(IOMD_IRQMASKA); |
| iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| iomd_writeb(mask, IOMD_IRQCLRA); |
| } |
| |
| static void cl7500_mask_irq_a(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << irq; |
| val = iomd_readb(IOMD_IRQMASKA); |
| iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| } |
| |
| static void cl7500_unmask_irq_a(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << irq; |
| val = iomd_readb(IOMD_IRQMASKA); |
| iomd_writeb(val | mask, IOMD_IRQMASKA); |
| } |
| |
| static struct irq_chip clps7500_a_chip = { |
| .ack = cl7500_ack_irq_a, |
| .mask = cl7500_mask_irq_a, |
| .unmask = cl7500_unmask_irq_a, |
| }; |
| |
| static void cl7500_mask_irq_b(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_IRQMASKB); |
| iomd_writeb(val & ~mask, IOMD_IRQMASKB); |
| } |
| |
| static void cl7500_unmask_irq_b(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_IRQMASKB); |
| iomd_writeb(val | mask, IOMD_IRQMASKB); |
| } |
| |
| static struct irq_chip clps7500_b_chip = { |
| .ack = cl7500_mask_irq_b, |
| .mask = cl7500_mask_irq_b, |
| .unmask = cl7500_unmask_irq_b, |
| }; |
| |
| static void cl7500_mask_irq_c(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_IRQMASKC); |
| iomd_writeb(val & ~mask, IOMD_IRQMASKC); |
| } |
| |
| static void cl7500_unmask_irq_c(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_IRQMASKC); |
| iomd_writeb(val | mask, IOMD_IRQMASKC); |
| } |
| |
| static struct irq_chip clps7500_c_chip = { |
| .ack = cl7500_mask_irq_c, |
| .mask = cl7500_mask_irq_c, |
| .unmask = cl7500_unmask_irq_c, |
| }; |
| |
| static void cl7500_mask_irq_d(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_IRQMASKD); |
| iomd_writeb(val & ~mask, IOMD_IRQMASKD); |
| } |
| |
| static void cl7500_unmask_irq_d(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_IRQMASKD); |
| iomd_writeb(val | mask, IOMD_IRQMASKD); |
| } |
| |
| static struct irq_chip clps7500_d_chip = { |
| .ack = cl7500_mask_irq_d, |
| .mask = cl7500_mask_irq_d, |
| .unmask = cl7500_unmask_irq_d, |
| }; |
| |
| static void cl7500_mask_irq_dma(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_DMAMASK); |
| iomd_writeb(val & ~mask, IOMD_DMAMASK); |
| } |
| |
| static void cl7500_unmask_irq_dma(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_DMAMASK); |
| iomd_writeb(val | mask, IOMD_DMAMASK); |
| } |
| |
| static struct irq_chip clps7500_dma_chip = { |
| .ack = cl7500_mask_irq_dma, |
| .mask = cl7500_mask_irq_dma, |
| .unmask = cl7500_unmask_irq_dma, |
| }; |
| |
| static void cl7500_mask_irq_fiq(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_FIQMASK); |
| iomd_writeb(val & ~mask, IOMD_FIQMASK); |
| } |
| |
| static void cl7500_unmask_irq_fiq(unsigned int irq) |
| { |
| unsigned int val, mask; |
| |
| mask = 1 << (irq & 7); |
| val = iomd_readb(IOMD_FIQMASK); |
| iomd_writeb(val | mask, IOMD_FIQMASK); |
| } |
| |
| static struct irq_chip clps7500_fiq_chip = { |
| .ack = cl7500_mask_irq_fiq, |
| .mask = cl7500_mask_irq_fiq, |
| .unmask = cl7500_unmask_irq_fiq, |
| }; |
| |
| static void cl7500_no_action(unsigned int irq) |
| { |
| } |
| |
| static struct irq_chip clps7500_no_chip = { |
| .ack = cl7500_no_action, |
| .mask = cl7500_no_action, |
| .unmask = cl7500_no_action, |
| }; |
| |
| static struct irqaction irq_isa = { no_action, 0, CPU_MASK_NONE, "isa", NULL, NULL }; |
| |
| static void __init clps7500_init_irq(void) |
| { |
| unsigned int irq, flags; |
| |
| iomd_writeb(0, IOMD_IRQMASKA); |
| iomd_writeb(0, IOMD_IRQMASKB); |
| iomd_writeb(0, IOMD_FIQMASK); |
| iomd_writeb(0, IOMD_DMAMASK); |
| |
| for (irq = 0; irq < NR_IRQS; irq++) { |
| flags = IRQF_VALID; |
| |
| if (irq <= 6 || (irq >= 9 && irq <= 15) || |
| (irq >= 48 && irq <= 55)) |
| flags |= IRQF_PROBE; |
| |
| switch (irq) { |
| case 0 ... 7: |
| set_irq_chip(irq, &clps7500_a_chip); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_flags(irq, flags); |
| break; |
| |
| case 8 ... 15: |
| set_irq_chip(irq, &clps7500_b_chip); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_flags(irq, flags); |
| break; |
| |
| case 16 ... 22: |
| set_irq_chip(irq, &clps7500_dma_chip); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_flags(irq, flags); |
| break; |
| |
| case 24 ... 31: |
| set_irq_chip(irq, &clps7500_c_chip); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_flags(irq, flags); |
| break; |
| |
| case 40 ... 47: |
| set_irq_chip(irq, &clps7500_d_chip); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_flags(irq, flags); |
| break; |
| |
| case 48 ... 55: |
| set_irq_chip(irq, &clps7500_no_chip); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_flags(irq, flags); |
| break; |
| |
| case 64 ... 72: |
| set_irq_chip(irq, &clps7500_fiq_chip); |
| set_irq_handler(irq, handle_level_irq); |
| set_irq_flags(irq, flags); |
| break; |
| } |
| } |
| |
| setup_irq(IRQ_ISA, &irq_isa); |
| } |
| |
| static struct map_desc cl7500_io_desc[] __initdata = { |
| { /* IO space */ |
| .virtual = (unsigned long)IO_BASE, |
| .pfn = __phys_to_pfn(IO_START), |
| .length = IO_SIZE, |
| .type = MT_DEVICE |
| }, { /* ISA space */ |
| .virtual = ISA_BASE, |
| .pfn = __phys_to_pfn(ISA_START), |
| .length = ISA_SIZE, |
| .type = MT_DEVICE |
| }, { /* Flash */ |
| .virtual = FLASH_BASE, |
| .pfn = __phys_to_pfn(FLASH_START), |
| .length = FLASH_SIZE, |
| .type = MT_DEVICE |
| }, { /* LED */ |
| .virtual = LED_BASE, |
| .pfn = __phys_to_pfn(LED_START), |
| .length = LED_SIZE, |
| .type = MT_DEVICE |
| } |
| }; |
| |
| static void __init clps7500_map_io(void) |
| { |
| iotable_init(cl7500_io_desc, ARRAY_SIZE(cl7500_io_desc)); |
| } |
| |
| extern void ioctime_init(void); |
| extern unsigned long ioc_timer_gettimeoffset(void); |
| |
| static irqreturn_t |
| clps7500_timer_interrupt(int irq, void *dev_id) |
| { |
| write_seqlock(&xtime_lock); |
| |
| timer_tick(); |
| |
| /* Why not using do_leds interface?? */ |
| { |
| /* Twinkle the lights. */ |
| static int count, state = 0xff00; |
| if (count-- == 0) { |
| state ^= 0x100; |
| count = 25; |
| *((volatile unsigned int *)LED_ADDRESS) = state; |
| } |
| } |
| |
| write_sequnlock(&xtime_lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static struct irqaction clps7500_timer_irq = { |
| .name = "CLPS7500 Timer Tick", |
| .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, |
| .handler = clps7500_timer_interrupt, |
| }; |
| |
| /* |
| * Set up timer interrupt. |
| */ |
| static void __init clps7500_timer_init(void) |
| { |
| ioctime_init(); |
| setup_irq(IRQ_TIMER, &clps7500_timer_irq); |
| } |
| |
| static struct sys_timer clps7500_timer = { |
| .init = clps7500_timer_init, |
| .offset = ioc_timer_gettimeoffset, |
| }; |
| |
| static struct plat_serial8250_port serial_platform_data[] = { |
| { |
| .mapbase = 0x03010fe0, |
| .irq = 10, |
| .uartclk = 1843200, |
| .regshift = 2, |
| .iotype = UPIO_MEM, |
| .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, |
| }, |
| { |
| .mapbase = 0x03010be0, |
| .irq = 0, |
| .uartclk = 1843200, |
| .regshift = 2, |
| .iotype = UPIO_MEM, |
| .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, |
| }, |
| { |
| .iobase = ISASLOT_IO + 0x2e8, |
| .irq = 41, |
| .uartclk = 1843200, |
| .regshift = 0, |
| .iotype = UPIO_PORT, |
| .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| }, |
| { |
| .iobase = ISASLOT_IO + 0x3e8, |
| .irq = 40, |
| .uartclk = 1843200, |
| .regshift = 0, |
| .iotype = UPIO_PORT, |
| .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| }, |
| { }, |
| }; |
| |
| static struct platform_device serial_device = { |
| .name = "serial8250", |
| .id = PLAT8250_DEV_PLATFORM, |
| .dev = { |
| .platform_data = serial_platform_data, |
| }, |
| }; |
| |
| static void __init clps7500_init(void) |
| { |
| platform_device_register(&serial_device); |
| } |
| |
| MACHINE_START(CLPS7500, "CL-PS7500") |
| /* Maintainer: Philip Blundell */ |
| .phys_io = 0x03000000, |
| .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, |
| .map_io = clps7500_map_io, |
| .init_irq = clps7500_init_irq, |
| .init_machine = clps7500_init, |
| .timer = &clps7500_timer, |
| MACHINE_END |
| |