Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  linux/arch/arm/mach-pxa/lubbock.c

 *

 *  Support for the Intel DBPXA250 Development Platform.

 *

 *  Author:     Nicolas Pitre

 *  Created:    Jun 15, 2001

 *  Copyright:  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 version 2 as

 *  published by the Free Software Foundation.

 */

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/sysdev.h>

#include <linux/major.h>

#include <linux/fb.h>

#include <linux/interrupt.h>

#include <linux/mtd/mtd.h>

#include <linux/mtd/partitions.h>

#include <linux/spi/spi.h>

#include <linux/spi/ads7846.h>

#include <asm/arch/pxa2xx_spi.h>

#include <asm/setup.h>

#include <asm/memory.h>

#include <asm/mach-types.h>

#include <asm/hardware.h>

#include <asm/irq.h>

#include <asm/sizes.h>

#include <asm/mach/arch.h>

#include <asm/mach/map.h>

#include <asm/mach/irq.h>

#include <asm/mach/flash.h>

#include <asm/hardware/sa1111.h>

#include <asm/arch/pxa-regs.h>

#include <asm/arch/lubbock.h>

#include <asm/arch/udc.h>

#include <asm/arch/irda.h>

#include <asm/arch/pxafb.h>

#include <asm/arch/mmc.h>

#include "generic.h"

#include "devices.h"

#define LUB_MISC_WR             __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)

void lubbock_set_misc_wr(unsigned int mask, unsigned int set)

{

        unsigned long flags;

        local_irq_save(flags);

        LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);

        local_irq_restore(flags);

}

EXPORT_SYMBOL(lubbock_set_misc_wr);

static unsigned long lubbock_irq_enabled;

static void lubbock_mask_irq(unsigned int irq)

{

        int lubbock_irq = (irq - LUBBOCK_IRQ(0));

        LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));

}

static void lubbock_unmask_irq(unsigned int irq)

{

        int lubbock_irq = (irq - LUBBOCK_IRQ(0));

        /* the irq can be acknowledged only if deasserted, so it's done here */

        LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);

        LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));

}

static struct irq_chip lubbock_irq_chip = {

        .name           = "FPGA",

        .ack            = lubbock_mask_irq,

        .mask           = lubbock_mask_irq,

        .unmask         = lubbock_unmask_irq,

};

static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)

{

        unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;

        do {

                GEDR(0) = GPIO_bit(0);    /* clear our parent irq */

                if (likely(pending)) {

                        irq = LUBBOCK_IRQ(0) + __ffs(pending);

                        desc = irq_desc + irq;

                        desc_handle_irq(irq, desc);

                }

                pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;

        } while (pending);

}

static void __init lubbock_init_irq(void)

{

        int irq;

        pxa25x_init_irq();

        /* setup extra lubbock irqs */

        for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {

                set_irq_chip(irq, &lubbock_irq_chip);

                set_irq_handler(irq, handle_level_irq);

                set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);

        }

        set_irq_chained_handler(IRQ_GPIO(0), lubbock_irq_handler);

        set_irq_type(IRQ_GPIO(0), IRQT_FALLING);

}

#ifdef CONFIG_PM

static int lubbock_irq_resume(struct sys_device *dev)

{

        LUB_IRQ_MASK_EN = lubbock_irq_enabled;

        return 0;

}

static struct sysdev_class lubbock_irq_sysclass = {

        set_kset_name("cpld_irq"),

        .resume = lubbock_irq_resume,

};

static struct sys_device lubbock_irq_device = {

        .cls = &lubbock_irq_sysclass,

};

static int __init lubbock_irq_device_init(void)

{

        int ret = sysdev_class_register(&lubbock_irq_sysclass);

        if (ret == 0)

                ret = sysdev_register(&lubbock_irq_device);

        return ret;

}

device_initcall(lubbock_irq_device_init);

#endif

static int lubbock_udc_is_connected(void)

{

        return (LUB_MISC_RD & (1 << 9)) == 0;

}

static struct pxa2xx_udc_mach_info udc_info __initdata = {

        .udc_is_connected       = lubbock_udc_is_connected,

        // no D+ pullup; lubbock can't connect/disconnect in software

};

static struct platform_device lub_audio_device = {

        .name           = "pxa2xx-ac97",

        .id             = -1,

};

static struct resource sa1111_resources[] = {

        [0] = {

                .start  = 0x10000000,

                .end    = 0x10001fff,

                .flags  = IORESOURCE_MEM,

        },

        [1] = {

                .start  = LUBBOCK_SA1111_IRQ,

                .end    = LUBBOCK_SA1111_IRQ,

                .flags  = IORESOURCE_IRQ,

        },

};

static struct platform_device sa1111_device = {

        .name           = "sa1111",

        .id             = -1,

        .num_resources  = ARRAY_SIZE(sa1111_resources),

        .resource       = sa1111_resources,

};

static struct resource smc91x_resources[] = {

        [0] = {

                .name   = "smc91x-regs",

                .start  = 0x0c000c00,

                .end    = 0x0c0fffff,

                .flags  = IORESOURCE_MEM,

        },

        [1] = {

                .start  = LUBBOCK_ETH_IRQ,

                .end    = LUBBOCK_ETH_IRQ,

                .flags  = IORESOURCE_IRQ,

        },

        [2] = {

                .name   = "smc91x-attrib",

                .start  = 0x0e000000,

                .end    = 0x0e0fffff,

                .flags  = IORESOURCE_MEM,

        },

};

/* ADS7846 is connected through SSP ... and if your board has J5 populated,

 * you can select it to replace the ucb1400 by switching the touchscreen cable

 * (to J5) and poking board registers (as done below).  Else it's only useful

 * for the temperature sensors.

 */

static struct resource pxa_ssp_resources[] = {

        [0] = {

                .start  = __PREG(SSCR0_P(1)),

                .end    = __PREG(SSCR0_P(1)) + 0x14,

                .flags  = IORESOURCE_MEM,

        },

        [1] = {

                .start  = IRQ_SSP,

                .end    = IRQ_SSP,

                .flags  = IORESOURCE_IRQ,

        },

};

static struct pxa2xx_spi_master pxa_ssp_master_info = {

        .ssp_type       = PXA25x_SSP,

        .clock_enable   = CKEN_SSP,

        .num_chipselect = 0,

};

static struct platform_device pxa_ssp = {

        .name           = "pxa2xx-spi",

        .id             = 1,

        .resource       = pxa_ssp_resources,

        .num_resources  = ARRAY_SIZE(pxa_ssp_resources),

        .dev = {

                .platform_data  = &pxa_ssp_master_info,

        },

};

static int lubbock_ads7846_pendown_state(void)

{

        /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */

        return 0;

}

static struct ads7846_platform_data ads_info = {

        .model                  = 7846,

        .vref_delay_usecs       = 100,          /* internal, no cap */

        .get_pendown_state      = lubbock_ads7846_pendown_state,

        // .x_plate_ohms                = 500,  /* GUESS! */

        // .y_plate_ohms                = 500,  /* GUESS! */

};

static void ads7846_cs(u32 command)

{

        static const unsigned   TS_nCS = 1 << 11;

        lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);

}

static struct pxa2xx_spi_chip ads_hw = {

        .tx_threshold           = 1,

        .rx_threshold           = 2,

        .cs_control             = ads7846_cs,

};

static struct spi_board_info spi_board_info[] __initdata = { {

        .modalias       = "ads7846",

        .platform_data  = &ads_info,

        .controller_data = &ads_hw,

        .irq            = LUBBOCK_BB_IRQ,

        .max_speed_hz   = 120000 /* max sample rate at 3V */

                                * 26 /* command + data + overhead */,

        .bus_num        = 1,

        .chip_select    = 0,

},

};

static struct platform_device smc91x_device = {

        .name           = "smc91x",

        .id             = -1,

        .num_resources  = ARRAY_SIZE(smc91x_resources),

        .resource       = smc91x_resources,

};

static struct resource flash_resources[] = {

        [0] = {

                .start  = 0x00000000,

                .end    = SZ_64M - 1,

                .flags  = IORESOURCE_MEM,

        },

        [1] = {

                .start  = 0x04000000,

                .end    = 0x04000000 + SZ_64M - 1,

                .flags  = IORESOURCE_MEM,

        },

};

static struct mtd_partition lubbock_partitions[] = {

        {

                .name =         "Bootloader",

                .size =         0x00040000,

                .offset =       0,

                .mask_flags =   MTD_WRITEABLE  /* force read-only */

        },{

                .name =         "Kernel",

                .size =         0x00100000,

                .offset =       0x00040000,

        },{

                .name =         "Filesystem",

                .size =         MTDPART_SIZ_FULL,

                .offset =       0x00140000

        }

};

static struct flash_platform_data lubbock_flash_data[2] = {

        {

                .map_name       = "cfi_probe",

                .parts          = lubbock_partitions,

                .nr_parts       = ARRAY_SIZE(lubbock_partitions),

        }, {

                .map_name       = "cfi_probe",

                .parts          = NULL,

                .nr_parts       = 0,

        }

};

static struct platform_device lubbock_flash_device[2] = {

        {

                .name           = "pxa2xx-flash",

                .id             = 0,

                .dev = {

                        .platform_data = &lubbock_flash_data[0],

                },

                .resource = &flash_resources[0],

                .num_resources = 1,

        },

        {

                .name           = "pxa2xx-flash",

                .id             = 1,

                .dev = {

                        .platform_data = &lubbock_flash_data[1],

                },

                .resource = &flash_resources[1],

                .num_resources = 1,

        },

};

static struct platform_device *devices[] __initdata = {

        &sa1111_device,

        &lub_audio_device,

        &smc91x_device,

        &lubbock_flash_device[0],

        &lubbock_flash_device[1],

        &pxa_ssp,

};

static struct pxafb_mode_info sharp_lm8v31_mode = {

        .pixclock       = 270000,

        .xres           = 640,

        .yres           = 480,

        .bpp            = 16,

        .hsync_len      = 1,

        .left_margin    = 3,

        .right_margin   = 3,

        .vsync_len      = 1,

        .upper_margin   = 0,

        .lower_margin   = 0,

        .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,

        .cmap_greyscale = 0,

};

static struct pxafb_mach_info sharp_lm8v31 = {

        .modes          = &sharp_lm8v31_mode,

        .num_modes      = 1,

        .cmap_inverse   = 0,

        .cmap_static    = 0,

        .lccr0          = LCCR0_SDS,

        .lccr3          = LCCR3_PCP | LCCR3_Acb(255),

};

#define MMC_POLL_RATE           msecs_to_jiffies(1000)

static void lubbock_mmc_poll(unsigned long);

static irq_handler_t mmc_detect_int;

static struct timer_list mmc_timer = {

        .function       = lubbock_mmc_poll,

};

static void lubbock_mmc_poll(unsigned long data)

{

        unsigned long flags;

        /* clear any previous irq state, then ... */

        local_irq_save(flags);

        LUB_IRQ_SET_CLR &= ~(1 << 0);

        local_irq_restore(flags);

        /* poll until mmc/sd card is removed */

        if (LUB_IRQ_SET_CLR & (1 << 0))

                mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);

        else {

                (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);

                enable_irq(LUBBOCK_SD_IRQ);

        }

}

static irqreturn_t lubbock_detect_int(int irq, void *data)

{

        /* IRQ is level triggered; disable, and poll for removal */

        disable_irq(irq);

        mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);

        return mmc_detect_int(irq, data);

}

static int lubbock_mci_init(struct device *dev,

                irq_handler_t detect_int,

                void *data)

{

        /* setup GPIO for PXA25x MMC controller */

        pxa_gpio_mode(GPIO6_MMCCLK_MD);

        pxa_gpio_mode(GPIO8_MMCCS0_MD);

        /* detect card insert/eject */

        mmc_detect_int = detect_int;

        init_timer(&mmc_timer);

        mmc_timer.data = (unsigned long) data;

        return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,

                        IRQF_SAMPLE_RANDOM, "lubbock-sd-detect", data);

}

static int lubbock_mci_get_ro(struct device *dev)

{

        return (LUB_MISC_RD & (1 << 2)) != 0;

}

static void lubbock_mci_exit(struct device *dev, void *data)

{

        free_irq(LUBBOCK_SD_IRQ, data);

        del_timer_sync(&mmc_timer);

}

static struct pxamci_platform_data lubbock_mci_platform_data = {

        .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,

        .detect_delay   = 1,

        .init           = lubbock_mci_init,

        .get_ro         = lubbock_mci_get_ro,

        .exit           = lubbock_mci_exit,

};

static void lubbock_irda_transceiver_mode(struct device *dev, int mode)

{

        unsigned long flags;

        local_irq_save(flags);

        if (mode & IR_SIRMODE) {

                LUB_MISC_WR &= ~(1 << 4);

        } else if (mode & IR_FIRMODE) {

                LUB_MISC_WR |= 1 << 4;

        }

        local_irq_restore(flags);

}

static struct pxaficp_platform_data lubbock_ficp_platform_data = {

        .transceiver_cap  = IR_SIRMODE | IR_FIRMODE,

        .transceiver_mode = lubbock_irda_transceiver_mode,

};

static void __init lubbock_init(void)

{

        int flashboot = (LUB_CONF_SWITCHES & 1);

        pxa_set_udc_info(&udc_info);

        set_pxa_fb_info(&sharp_lm8v31);

        pxa_set_mci_info(&lubbock_mci_platform_data);

        pxa_set_ficp_info(&lubbock_ficp_platform_data);

        lubbock_flash_data[0].width = lubbock_flash_data[1].width =

                (BOOT_DEF & 1) ? 2 : 4;

        /* Compensate for the nROMBT switch which swaps the flash banks */

        printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",

               flashboot?"Flash":"ROM", flashboot);

        lubbock_flash_data[flashboot^1].name = "application-flash";

        lubbock_flash_data[flashboot].name = "boot-rom";

        (void) platform_add_devices(devices, ARRAY_SIZE(devices));

        spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));

}

static struct map_desc lubbock_io_desc[] __initdata = {

        {       /* CPLD */

                .virtual        =  LUBBOCK_FPGA_VIRT,

                .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),

                .length         = 0x00100000,

                .type           = MT_DEVICE

        }

};

static void __init lubbock_map_io(void)

{

        pxa_map_io();

        iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));

        /* SSP data pins */

        pxa_gpio_mode(GPIO23_SCLK_MD);

        pxa_gpio_mode(GPIO25_STXD_MD);

        pxa_gpio_mode(GPIO26_SRXD_MD);

        /* This enables the BTUART */

        pxa_gpio_mode(GPIO42_BTRXD_MD);

        pxa_gpio_mode(GPIO43_BTTXD_MD);

        pxa_gpio_mode(GPIO44_BTCTS_MD);

        pxa_gpio_mode(GPIO45_BTRTS_MD);

        GPSR(GPIO48_nPOE) =

                GPIO_bit(GPIO48_nPOE) |

                GPIO_bit(GPIO49_nPWE) |

                GPIO_bit(GPIO50_nPIOR) |

                GPIO_bit(GPIO51_nPIOW) |

                GPIO_bit(GPIO52_nPCE_1) |

                GPIO_bit(GPIO53_nPCE_2);

        pxa_gpio_mode(GPIO48_nPOE_MD);

        pxa_gpio_mode(GPIO49_nPWE_MD);

        pxa_gpio_mode(GPIO50_nPIOR_MD);

        pxa_gpio_mode(GPIO51_nPIOW_MD);

        pxa_gpio_mode(GPIO52_nPCE_1_MD);

        pxa_gpio_mode(GPIO53_nPCE_2_MD);

        pxa_gpio_mode(GPIO54_pSKTSEL_MD);

        pxa_gpio_mode(GPIO55_nPREG_MD);

        pxa_gpio_mode(GPIO56_nPWAIT_MD);

        pxa_gpio_mode(GPIO57_nIOIS16_MD);

        /* This is for the SMC chip select */

        pxa_gpio_mode(GPIO79_nCS_3_MD);

        /* setup sleep mode values */

        PWER  = 0x00000002;

        PFER  = 0x00000000;

        PRER  = 0x00000002;

        PGSR0 = 0x00008000;

        PGSR1 = 0x003F0202;

        PGSR2 = 0x0001C000;

        PCFR |= PCFR_OPDE;

}

MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")

        /* Maintainer: MontaVista Software Inc. */

        .phys_io        = 0x40000000,

        .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,

        .map_io         = lubbock_map_io,

        .init_irq       = lubbock_init_irq,

        .timer          = &pxa_timer,

        .init_machine   = lubbock_init,

MACHINE_END