diff options
Diffstat (limited to 'arch/arm/mach-integrator/integrator_cp.c')
| -rw-r--r-- | arch/arm/mach-integrator/integrator_cp.c | 528 |
1 files changed, 528 insertions, 0 deletions
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c new file mode 100644 index 00000000000..68e15c36e33 --- /dev/null +++ b/arch/arm/mach-integrator/integrator_cp.c @@ -0,0 +1,528 @@ +/* + * linux/arch/arm/mach-integrator/integrator_cp.c + * + * Copyright (C) 2003 Deep Blue Solutions Ltd + * + * 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. + */ +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/sysdev.h> + +#include <asm/hardware.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/setup.h> +#include <asm/mach-types.h> +#include <asm/hardware/amba.h> +#include <asm/hardware/amba_kmi.h> +#include <asm/hardware/amba_clcd.h> +#include <asm/hardware/icst525.h> + +#include <asm/arch/cm.h> +#include <asm/arch/lm.h> + +#include <asm/mach/arch.h> +#include <asm/mach/flash.h> +#include <asm/mach/irq.h> +#include <asm/mach/mmc.h> +#include <asm/mach/map.h> +#include <asm/mach/time.h> + +#include "common.h" +#include "clock.h" + +#define INTCP_PA_MMC_BASE 0x1c000000 +#define INTCP_PA_AACI_BASE 0x1d000000 + +#define INTCP_PA_FLASH_BASE 0x24000000 +#define INTCP_FLASH_SIZE SZ_32M + +#define INTCP_PA_CLCD_BASE 0xc0000000 + +#define INTCP_VA_CIC_BASE 0xf1000040 +#define INTCP_VA_PIC_BASE 0xf1400000 +#define INTCP_VA_SIC_BASE 0xfca00000 + +#define INTCP_PA_ETH_BASE 0xc8000000 +#define INTCP_ETH_SIZE 0x10 + +#define INTCP_VA_CTRL_BASE 0xfcb00000 +#define INTCP_FLASHPROG 0x04 +#define CINTEGRATOR_FLASHPROG_FLVPPEN (1 << 0) +#define CINTEGRATOR_FLASHPROG_FLWREN (1 << 1) + +/* + * Logical Physical + * f1000000 10000000 Core module registers + * f1100000 11000000 System controller registers + * f1200000 12000000 EBI registers + * f1300000 13000000 Counter/Timer + * f1400000 14000000 Interrupt controller + * f1600000 16000000 UART 0 + * f1700000 17000000 UART 1 + * f1a00000 1a000000 Debug LEDs + * f1b00000 1b000000 GPIO + */ + +static struct map_desc intcp_io_desc[] __initdata = { + { IO_ADDRESS(INTEGRATOR_HDR_BASE), INTEGRATOR_HDR_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_SC_BASE), INTEGRATOR_SC_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_EBI_BASE), INTEGRATOR_EBI_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_CT_BASE), INTEGRATOR_CT_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_IC_BASE), INTEGRATOR_IC_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_UART0_BASE), INTEGRATOR_UART0_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_UART1_BASE), INTEGRATOR_UART1_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_DBG_BASE), INTEGRATOR_DBG_BASE, SZ_4K, MT_DEVICE }, + { IO_ADDRESS(INTEGRATOR_GPIO_BASE), INTEGRATOR_GPIO_BASE, SZ_4K, MT_DEVICE }, + { 0xfc900000, 0xc9000000, SZ_4K, MT_DEVICE }, + { 0xfca00000, 0xca000000, SZ_4K, MT_DEVICE }, + { 0xfcb00000, 0xcb000000, SZ_4K, MT_DEVICE }, +}; + +static void __init intcp_map_io(void) +{ + iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc)); +} + +#define cic_writel __raw_writel +#define cic_readl __raw_readl +#define pic_writel __raw_writel +#define pic_readl __raw_readl +#define sic_writel __raw_writel +#define sic_readl __raw_readl + +static void cic_mask_irq(unsigned int irq) +{ + irq -= IRQ_CIC_START; + cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR); +} + +static void cic_unmask_irq(unsigned int irq) +{ + irq -= IRQ_CIC_START; + cic_writel(1 << irq, INTCP_VA_CIC_BASE + IRQ_ENABLE_SET); +} + +static struct irqchip cic_chip = { + .ack = cic_mask_irq, + .mask = cic_mask_irq, + .unmask = cic_unmask_irq, +}; + +static void pic_mask_irq(unsigned int irq) +{ + irq -= IRQ_PIC_START; + pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR); +} + +static void pic_unmask_irq(unsigned int irq) +{ + irq -= IRQ_PIC_START; + pic_writel(1 << irq, INTCP_VA_PIC_BASE + IRQ_ENABLE_SET); +} + +static struct irqchip pic_chip = { + .ack = pic_mask_irq, + .mask = pic_mask_irq, + .unmask = pic_unmask_irq, +}; + +static void sic_mask_irq(unsigned int irq) +{ + irq -= IRQ_SIC_START; + sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR); +} + +static void sic_unmask_irq(unsigned int irq) +{ + irq -= IRQ_SIC_START; + sic_writel(1 << irq, INTCP_VA_SIC_BASE + IRQ_ENABLE_SET); +} + +static struct irqchip sic_chip = { + .ack = sic_mask_irq, + .mask = sic_mask_irq, + .unmask = sic_unmask_irq, +}; + +static void +sic_handle_irq(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs) +{ + unsigned long status = sic_readl(INTCP_VA_SIC_BASE + IRQ_STATUS); + + if (status == 0) { + do_bad_IRQ(irq, desc, regs); + return; + } + + do { + irq = ffs(status) - 1; + status &= ~(1 << irq); + + irq += IRQ_SIC_START; + + desc = irq_desc + irq; + desc->handle(irq, desc, regs); + } while (status); +} + +static void __init intcp_init_irq(void) +{ + unsigned int i; + + /* + * Disable all interrupt sources + */ + pic_writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR); + pic_writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR); + + for (i = IRQ_PIC_START; i <= IRQ_PIC_END; i++) { + if (i == 11) + i = 22; + if (i == IRQ_CP_CPPLDINT) + i++; + if (i == 29) + break; + set_irq_chip(i, &pic_chip); + set_irq_handler(i, do_level_IRQ); + set_irq_flags(i, IRQF_VALID | IRQF_PROBE); + } + + cic_writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR); + cic_writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR); + + for (i = IRQ_CIC_START; i <= IRQ_CIC_END; i++) { + set_irq_chip(i, &cic_chip); + set_irq_handler(i, do_level_IRQ); + set_irq_flags(i, IRQF_VALID); + } + + sic_writel(0x00000fff, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR); + sic_writel(0x00000fff, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR); + + for (i = IRQ_SIC_START; i <= IRQ_SIC_END; i++) { + set_irq_chip(i, &sic_chip); + set_irq_handler(i, do_level_IRQ); + set_irq_flags(i, IRQF_VALID | IRQF_PROBE); + } + + set_irq_handler(IRQ_CP_CPPLDINT, sic_handle_irq); + pic_unmask_irq(IRQ_CP_CPPLDINT); +} + +/* + * Clock handling + */ +#define CM_LOCK (IO_ADDRESS(INTEGRATOR_HDR_BASE)+INTEGRATOR_HDR_LOCK_OFFSET) +#define CM_AUXOSC (IO_ADDRESS(INTEGRATOR_HDR_BASE)+0x1c) + +static const struct icst525_params cp_auxvco_params = { + .ref = 24000, + .vco_max = 320000, + .vd_min = 8, + .vd_max = 263, + .rd_min = 3, + .rd_max = 65, +}; + +static void cp_auxvco_set(struct clk *clk, struct icst525_vco vco) +{ + u32 val; + + val = readl(CM_AUXOSC) & ~0x7ffff; + val |= vco.v | (vco.r << 9) | (vco.s << 16); + + writel(0xa05f, CM_LOCK); + writel(val, CM_AUXOSC); + writel(0, CM_LOCK); +} + +static struct clk cp_clcd_clk = { + .name = "CLCDCLK", + .params = &cp_auxvco_params, + .setvco = cp_auxvco_set, +}; + +static struct clk cp_mmci_clk = { + .name = "MCLK", + .rate = 14745600, +}; + +/* + * Flash handling. + */ +static int intcp_flash_init(void) +{ + u32 val; + + val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG); + val |= CINTEGRATOR_FLASHPROG_FLWREN; + writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG); + + return 0; +} + +static void intcp_flash_exit(void) +{ + u32 val; + + val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG); + val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN); + writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG); +} + +static void intcp_flash_set_vpp(int on) +{ + u32 val; + + val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG); + if (on) + val |= CINTEGRATOR_FLASHPROG_FLVPPEN; + else + val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN; + writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG); +} + +static struct flash_platform_data intcp_flash_data = { + .map_name = "cfi_probe", + .width = 4, + .init = intcp_flash_init, + .exit = intcp_flash_exit, + .set_vpp = intcp_flash_set_vpp, +}; + +static struct resource intcp_flash_resource = { + .start = INTCP_PA_FLASH_BASE, + .end = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1, + .flags = IORESOURCE_MEM, +}; + +static struct platform_device intcp_flash_device = { + .name = "armflash", + .id = 0, + .dev = { + .platform_data = &intcp_flash_data, + }, + .num_resources = 1, + .resource = &intcp_flash_resource, +}; + +static struct resource smc91x_resources[] = { + [0] = { + .start = INTCP_PA_ETH_BASE, + .end = INTCP_PA_ETH_BASE + INTCP_ETH_SIZE - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_CP_ETHINT, + .end = IRQ_CP_ETHINT, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device smc91x_device = { + .name = "smc91x", + .id = 0, + .num_resources = ARRAY_SIZE(smc91x_resources), + .resource = smc91x_resources, +}; + +static struct platform_device *intcp_devs[] __initdata = { + &intcp_flash_device, + &smc91x_device, +}; + +/* + * It seems that the card insertion interrupt remains active after + * we've acknowledged it. We therefore ignore the interrupt, and + * rely on reading it from the SIC. This also means that we must + * clear the latched interrupt. + */ +static unsigned int mmc_status(struct device *dev) +{ + unsigned int status = readl(0xfca00004); + writel(8, 0xfcb00008); + + return status & 8; +} + +static struct mmc_platform_data mmc_data = { + .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, + .status = mmc_status, +}; + +static struct amba_device mmc_device = { + .dev = { + .bus_id = "mb:1c", + .platform_data = &mmc_data, + }, + .res = { + .start = INTCP_PA_MMC_BASE, + .end = INTCP_PA_MMC_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, + .irq = { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 }, + .periphid = 0, +}; + +static struct amba_device aaci_device = { + .dev = { + .bus_id = "mb:1d", + }, + .res = { + .start = INTCP_PA_AACI_BASE, + .end = INTCP_PA_AACI_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, + .irq = { IRQ_CP_AACIINT, NO_IRQ }, + .periphid = 0, +}; + + +/* + * CLCD support + */ +static struct clcd_panel vga = { + .mode = { + .name = "VGA", + .refresh = 60, + .xres = 640, + .yres = 480, + .pixclock = 39721, + .left_margin = 40, + .right_margin = 24, + .upper_margin = 32, + .lower_margin = 11, + .hsync_len = 96, + .vsync_len = 2, + .sync = 0, + .vmode = FB_VMODE_NONINTERLACED, + }, + .width = -1, + .height = -1, + .tim2 = TIM2_BCD | TIM2_IPC, + .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1), + .bpp = 16, + .grayscale = 0, +}; + +/* + * Ensure VGA is selected. + */ +static void cp_clcd_enable(struct clcd_fb *fb) +{ + cm_control(CM_CTRL_LCDMUXSEL_MASK, CM_CTRL_LCDMUXSEL_VGA); +} + +static unsigned long framesize = SZ_1M; + +static int cp_clcd_setup(struct clcd_fb *fb) +{ + dma_addr_t dma; + + fb->panel = &vga; + + fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize, + &dma, GFP_KERNEL); + if (!fb->fb.screen_base) { + printk(KERN_ERR "CLCD: unable to map framebuffer\n"); + return -ENOMEM; + } + + fb->fb.fix.smem_start = dma; + fb->fb.fix.smem_len = framesize; + + return 0; +} + +static int cp_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma) +{ + return dma_mmap_writecombine(&fb->dev->dev, vma, + fb->fb.screen_base, + fb->fb.fix.smem_start, + fb->fb.fix.smem_len); +} + +static void cp_clcd_remove(struct clcd_fb *fb) +{ + dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len, + fb->fb.screen_base, fb->fb.fix.smem_start); +} + +static struct clcd_board clcd_data = { + .name = "Integrator/CP", + .check = clcdfb_check, + .decode = clcdfb_decode, + .enable = cp_clcd_enable, + .setup = cp_clcd_setup, + .mmap = cp_clcd_mmap, + .remove = cp_clcd_remove, +}; + +static struct amba_device clcd_device = { + .dev = { + .bus_id = "mb:c0", + .coherent_dma_mask = ~0, + .platform_data = &clcd_data, + }, + .res = { + .start = INTCP_PA_CLCD_BASE, + .end = INTCP_PA_CLCD_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, + }, + .dma_mask = ~0, + .irq = { IRQ_CP_CLCDCINT, NO_IRQ }, + .periphid = 0, +}; + +static struct amba_device *amba_devs[] __initdata = { + &mmc_device, + &aaci_device, + &clcd_device, +}; + +static void __init intcp_init(void) +{ + int i; + + clk_register(&cp_clcd_clk); + clk_register(&cp_mmci_clk); + + platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs)); + + for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { + struct amba_device *d = amba_devs[i]; + amba_device_register(d, &iomem_resource); + } +} + +#define TIMER_CTRL_IE (1 << 5) /* Interrupt Enable */ + +static void __init intcp_timer_init(void) +{ + integrator_time_init(1000000 / HZ, TIMER_CTRL_IE); +} + +static struct sys_timer cp_timer = { + .init = intcp_timer_init, + .offset = integrator_gettimeoffset, +}; + +MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP") + MAINTAINER("ARM Ltd/Deep Blue Solutions Ltd") + BOOT_MEM(0x00000000, 0x16000000, 0xf1600000) + BOOT_PARAMS(0x00000100) + MAPIO(intcp_map_io) + INITIRQ(intcp_init_irq) + .timer = &cp_timer, + INIT_MACHINE(intcp_init) +MACHINE_END |