ct-ca9x4.c

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/*
 * Versatile Express Core Tile Cortex A9x4 Support
 */
#include <linux/init.h>
#include <linux/gfp.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/amba/bus.h>
#include <linux/amba/clcd.h>
#include <linux/clkdev.h>

#include <asm/hardware/arm_timer.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <asm/smp_scu.h>
#include <asm/smp_twd.h>

#include <mach/ct-ca9x4.h>

#include <asm/hardware/timer-sp.h>

#include <asm/mach/map.h>
#include <asm/mach/time.h>

#include "core.h"

#include <mach/motherboard.h>
#include <mach/irqs.h>

#include <plat/clcd.h>

static struct map_desc ct_ca9x4_io_desc[] __initdata = {
    {
        .virtual        = V2T_PERIPH,
        .pfn            = __phys_to_pfn(CT_CA9X4_MPIC),
        .length         = SZ_8K,
        .type           = MT_DEVICE,
    },
};

static void __init ct_ca9x4_map_io(void)
{
    iotable_init(ct_ca9x4_io_desc, ARRAY_SIZE(ct_ca9x4_io_desc));
}

#ifdef CONFIG_HAVE_ARM_TWD
static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, A9_MPCORE_TWD, IRQ_LOCALTIMER);

static void __init ca9x4_twd_init(void)
{
    int err = twd_local_timer_register(&twd_local_timer);
    if (err)
        pr_err("twd_local_timer_register failed %d\n", err);
}
#else
#define ca9x4_twd_init()    do {} while(0)
#endif

static void __init ct_ca9x4_init_irq(void)
{
    gic_init(0, 29, ioremap(A9_MPCORE_GIC_DIST, SZ_4K),
         ioremap(A9_MPCORE_GIC_CPU, SZ_256));
    ca9x4_twd_init();
}

static void ct_ca9x4_clcd_enable(struct clcd_fb *fb)
{
    u32 site = v2m_get_master_site();

    /*
     * Old firmware was using the "site" component of the command
     * to control the DVI muxer (while it should be always 0 ie. MB).
     * Newer firmware uses the data register. Keep both for compatibility.
     */
    v2m_cfg_write(SYS_CFG_MUXFPGA | SYS_CFG_SITE(site), site);
    v2m_cfg_write(SYS_CFG_DVIMODE | SYS_CFG_SITE(SYS_CFG_SITE_MB), 2);
}

static int ct_ca9x4_clcd_setup(struct clcd_fb *fb)
{
    unsigned long framesize = 1024 * 768 * 2;

    fb->panel = versatile_clcd_get_panel("XVGA");
    if (!fb->panel)
        return -EINVAL;

    return versatile_clcd_setup_dma(fb, framesize);
}

static struct clcd_board ct_ca9x4_clcd_data = {
    .name       = "CT-CA9X4",
    .caps       = CLCD_CAP_5551 | CLCD_CAP_565,
    .check      = clcdfb_check,
    .decode     = clcdfb_decode,
    .enable     = ct_ca9x4_clcd_enable,
    .setup      = ct_ca9x4_clcd_setup,
    .mmap       = versatile_clcd_mmap_dma,
    .remove     = versatile_clcd_remove_dma,
};

static AMBA_AHB_DEVICE(clcd, "ct:clcd", 0, CT_CA9X4_CLCDC, IRQ_CT_CA9X4_CLCDC, &ct_ca9x4_clcd_data);
static AMBA_APB_DEVICE(dmc, "ct:dmc", 0, CT_CA9X4_DMC, IRQ_CT_CA9X4_DMC, NULL);
static AMBA_APB_DEVICE(smc, "ct:smc", 0, CT_CA9X4_SMC, IRQ_CT_CA9X4_SMC, NULL);
static AMBA_APB_DEVICE(gpio, "ct:gpio", 0, CT_CA9X4_GPIO, IRQ_CT_CA9X4_GPIO, NULL);

static struct amba_device *ct_ca9x4_amba_devs[] __initdata = {
    &clcd_device,
    &dmc_device,
    &smc_device,
    &gpio_device,
};


static struct v2m_osc ct_osc1 = {
    .osc = 1,
    .rate_min = 10000000,
    .rate_max = 80000000,
    .rate_default = 23750000,
};

static struct resource pmu_resources[] = {
    [0] = {
        .start  = IRQ_CT_CA9X4_PMU_CPU0,
        .end    = IRQ_CT_CA9X4_PMU_CPU0,
        .flags  = IORESOURCE_IRQ,
    },
    [1] = {
        .start  = IRQ_CT_CA9X4_PMU_CPU1,
        .end    = IRQ_CT_CA9X4_PMU_CPU1,
        .flags  = IORESOURCE_IRQ,
    },
    [2] = {
        .start  = IRQ_CT_CA9X4_PMU_CPU2,
        .end    = IRQ_CT_CA9X4_PMU_CPU2,
        .flags  = IORESOURCE_IRQ,
    },
    [3] = {
        .start  = IRQ_CT_CA9X4_PMU_CPU3,
        .end    = IRQ_CT_CA9X4_PMU_CPU3,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct platform_device pmu_device = {
    .name       = "arm-pmu",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(pmu_resources),
    .resource   = pmu_resources,
};

static void __init ct_ca9x4_init(void)
{
    int i;
    struct clk *clk;

#ifdef CONFIG_CACHE_L2X0
    void __iomem *l2x0_base = ioremap(CT_CA9X4_L2CC, SZ_4K);

    /* set RAM latencies to 1 cycle for this core tile. */
    writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
    writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);

    l2x0_init(l2x0_base, 0x00400000, 0xfe0fffff);
#endif

    ct_osc1.site = v2m_get_master_site();
    clk = v2m_osc_register("ct:osc1", &ct_osc1);
    clk_register_clkdev(clk, NULL, "ct:clcd");

    for (i = 0; i < ARRAY_SIZE(ct_ca9x4_amba_devs); i++)
        amba_device_register(ct_ca9x4_amba_devs[i], &iomem_resource);

    platform_device_register(&pmu_device);
}

#ifdef CONFIG_SMP
static void *ct_ca9x4_scu_base __initdata;

static void __init ct_ca9x4_init_cpu_map(void)
{
    int i, ncores;

    ct_ca9x4_scu_base = ioremap(A9_MPCORE_SCU, SZ_128);
    if (WARN_ON(!ct_ca9x4_scu_base))
        return;

    ncores = scu_get_core_count(ct_ca9x4_scu_base);

    if (ncores > nr_cpu_ids) {
        pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
            ncores, nr_cpu_ids);
        ncores = nr_cpu_ids;
    }

    for (i = 0; i < ncores; ++i)
        set_cpu_possible(i, true);

    set_smp_cross_call(gic_raise_softirq);
}

static void __init ct_ca9x4_smp_enable(unsigned int max_cpus)
{
    scu_enable(ct_ca9x4_scu_base);
}
#endif

struct ct_desc ct_ca9x4_desc __initdata = {
    .id     = V2M_CT_ID_CA9,
    .name       = "CA9x4",
    .map_io     = ct_ca9x4_map_io,
    .init_irq   = ct_ca9x4_init_irq,
    .init_tile  = ct_ca9x4_init,
#ifdef CONFIG_SMP
    .init_cpu_map   = ct_ca9x4_init_cpu_map,
    .smp_enable = ct_ca9x4_smp_enable,
#endif
};