linux-stable-rt/arch/arm/mach-vexpress/v2m.c

/*
 * Versatile Express V2M Motherboard Support
 */
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/ata_platform.h>
#include <linux/smsc911x.h>
#include <linux/spinlock.h>
#include <linux/sysdev.h>
#include <linux/usb/isp1760.h>
#include <linux/clkdev.h>
#include <linux/mtd/physmap.h>

#include <asm/mach-types.h>
#include <asm/sizes.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/hardware/arm_timer.h>
#include <asm/hardware/timer-sp.h>
#include <asm/hardware/sp810.h>

#include <mach/ct-ca9x4.h>
#include <mach/motherboard.h>

#include <plat/sched_clock.h>

#include "core.h"

#define V2M_PA_CS0	0x40000000
#define V2M_PA_CS1	0x44000000
#define V2M_PA_CS2	0x48000000
#define V2M_PA_CS3	0x4c000000
#define V2M_PA_CS7	0x10000000

static struct map_desc v2m_io_desc[] __initdata = {
	{
		.virtual	= __MMIO_P2V(V2M_PA_CS7),
		.pfn		= __phys_to_pfn(V2M_PA_CS7),
		.length		= SZ_128K,
		.type		= MT_DEVICE,
	},
};

static void __init v2m_timer_init(void)
{
	u32 scctrl;

	/* Select 1MHz TIMCLK as the reference clock for SP804 timers */
	scctrl = readl(MMIO_P2V(V2M_SYSCTL + SCCTRL));
	scctrl |= SCCTRL_TIMEREN0SEL_TIMCLK;
	scctrl |= SCCTRL_TIMEREN1SEL_TIMCLK;
	writel(scctrl, MMIO_P2V(V2M_SYSCTL + SCCTRL));

	writel(0, MMIO_P2V(V2M_TIMER0) + TIMER_CTRL);
	writel(0, MMIO_P2V(V2M_TIMER1) + TIMER_CTRL);

	sp804_clocksource_init(MMIO_P2V(V2M_TIMER1), "v2m-timer1");
	sp804_clockevents_init(MMIO_P2V(V2M_TIMER0), IRQ_V2M_TIMER0,
		"v2m-timer0");
}

static struct sys_timer v2m_timer = {
	.init	= v2m_timer_init,
};


static DEFINE_SPINLOCK(v2m_cfg_lock);

int v2m_cfg_write(u32 devfn, u32 data)
{
	/* Configuration interface broken? */
	u32 val;

	printk("%s: writing %08x to %08x\n", __func__, data, devfn);

	devfn |= SYS_CFG_START | SYS_CFG_WRITE;

	spin_lock(&v2m_cfg_lock);
	val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
	writel(val & ~SYS_CFG_COMPLETE, MMIO_P2V(V2M_SYS_CFGSTAT));

	writel(data, MMIO_P2V(V2M_SYS_CFGDATA));
	writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));

	do {
		val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
	} while (val == 0);
	spin_unlock(&v2m_cfg_lock);

	return !!(val & SYS_CFG_ERR);
}

int v2m_cfg_read(u32 devfn, u32 *data)
{
	u32 val;

	devfn |= SYS_CFG_START;

	spin_lock(&v2m_cfg_lock);
	writel(0, MMIO_P2V(V2M_SYS_CFGSTAT));
	writel(devfn, MMIO_P2V(V2M_SYS_CFGCTRL));

	mb();

	do {
		cpu_relax();
		val = readl(MMIO_P2V(V2M_SYS_CFGSTAT));
	} while (val == 0);

	*data = readl(MMIO_P2V(V2M_SYS_CFGDATA));
	spin_unlock(&v2m_cfg_lock);

	return !!(val & SYS_CFG_ERR);
}


static struct resource v2m_pcie_i2c_resource = {
	.start	= V2M_SERIAL_BUS_PCI,
	.end	= V2M_SERIAL_BUS_PCI + SZ_4K - 1,
	.flags	= IORESOURCE_MEM,
};

static struct platform_device v2m_pcie_i2c_device = {
	.name		= "versatile-i2c",
	.id		= 0,
	.num_resources	= 1,
	.resource	= &v2m_pcie_i2c_resource,
};

static struct resource v2m_ddc_i2c_resource = {
	.start	= V2M_SERIAL_BUS_DVI,
	.end	= V2M_SERIAL_BUS_DVI + SZ_4K - 1,
	.flags	= IORESOURCE_MEM,
};

static struct platform_device v2m_ddc_i2c_device = {
	.name		= "versatile-i2c",
	.id		= 1,
	.num_resources	= 1,
	.resource	= &v2m_ddc_i2c_resource,
};

static struct resource v2m_eth_resources[] = {
	{
		.start	= V2M_LAN9118,
		.end	= V2M_LAN9118 + SZ_64K - 1,
		.flags	= IORESOURCE_MEM,
	}, {
		.start	= IRQ_V2M_LAN9118,
		.end	= IRQ_V2M_LAN9118,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct smsc911x_platform_config v2m_eth_config = {
	.flags		= SMSC911X_USE_32BIT,
	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_HIGH,
	.irq_type	= SMSC911X_IRQ_TYPE_PUSH_PULL,
	.phy_interface	= PHY_INTERFACE_MODE_MII,
};

static struct platform_device v2m_eth_device = {
	.name		= "smsc911x",
	.id		= -1,
	.resource	= v2m_eth_resources,
	.num_resources	= ARRAY_SIZE(v2m_eth_resources),
	.dev.platform_data = &v2m_eth_config,
};

static struct resource v2m_usb_resources[] = {
	{
		.start	= V2M_ISP1761,
		.end	= V2M_ISP1761 + SZ_128K - 1,
		.flags	= IORESOURCE_MEM,
	}, {
		.start	= IRQ_V2M_ISP1761,
		.end	= IRQ_V2M_ISP1761,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct isp1760_platform_data v2m_usb_config = {
	.is_isp1761		= true,
	.bus_width_16		= false,
	.port1_otg		= true,
	.analog_oc		= false,
	.dack_polarity_high	= false,
	.dreq_polarity_high	= false,
};

static struct platform_device v2m_usb_device = {
	.name		= "isp1760",
	.id		= -1,
	.resource	= v2m_usb_resources,
	.num_resources	= ARRAY_SIZE(v2m_usb_resources),
	.dev.platform_data = &v2m_usb_config,
};

static void v2m_flash_set_vpp(struct platform_device *pdev, int on)
{
	writel(on != 0, MMIO_P2V(V2M_SYS_FLASH));
}

static struct physmap_flash_data v2m_flash_data = {
	.width		= 4,
	.set_vpp	= v2m_flash_set_vpp,
};

static struct resource v2m_flash_resources[] = {
	{
		.start	= V2M_NOR0,
		.end	= V2M_NOR0 + SZ_64M - 1,
		.flags	= IORESOURCE_MEM,
	}, {
		.start	= V2M_NOR1,
		.end	= V2M_NOR1 + SZ_64M - 1,
		.flags	= IORESOURCE_MEM,
	},
};

static struct platform_device v2m_flash_device = {
	.name		= "physmap-flash",
	.id		= -1,
	.resource	= v2m_flash_resources,
	.num_resources	= ARRAY_SIZE(v2m_flash_resources),
	.dev.platform_data = &v2m_flash_data,
};

static struct pata_platform_info v2m_pata_data = {
	.ioport_shift	= 2,
};

static struct resource v2m_pata_resources[] = {
	{
		.start	= V2M_CF,
		.end	= V2M_CF + 0xff,
		.flags	= IORESOURCE_MEM,
	}, {
		.start	= V2M_CF + 0x100,
		.end	= V2M_CF + SZ_4K - 1,
		.flags	= IORESOURCE_MEM,
	},
};

static struct platform_device v2m_cf_device = {
	.name		= "pata_platform",
	.id		= -1,
	.resource	= v2m_pata_resources,
	.num_resources	= ARRAY_SIZE(v2m_pata_resources),
	.dev.platform_data = &v2m_pata_data,
};

static unsigned int v2m_mmci_status(struct device *dev)
{
	return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
}

static struct mmci_platform_data v2m_mmci_data = {
	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
	.status		= v2m_mmci_status,
};

static AMBA_DEVICE(aaci,  "mb:aaci",  V2M_AACI, NULL);
static AMBA_DEVICE(mmci,  "mb:mmci",  V2M_MMCI, &v2m_mmci_data);
static AMBA_DEVICE(kmi0,  "mb:kmi0",  V2M_KMI0, NULL);
static AMBA_DEVICE(kmi1,  "mb:kmi1",  V2M_KMI1, NULL);
static AMBA_DEVICE(uart0, "mb:uart0", V2M_UART0, NULL);
static AMBA_DEVICE(uart1, "mb:uart1", V2M_UART1, NULL);
static AMBA_DEVICE(uart2, "mb:uart2", V2M_UART2, NULL);
static AMBA_DEVICE(uart3, "mb:uart3", V2M_UART3, NULL);
static AMBA_DEVICE(wdt,   "mb:wdt",   V2M_WDT, NULL);
static AMBA_DEVICE(rtc,   "mb:rtc",   V2M_RTC, NULL);

static struct amba_device *v2m_amba_devs[] __initdata = {
	&aaci_device,
	&mmci_device,
	&kmi0_device,
	&kmi1_device,
	&uart0_device,
	&uart1_device,
	&uart2_device,
	&uart3_device,
	&wdt_device,
	&rtc_device,
};


static long v2m_osc_round(struct clk *clk, unsigned long rate)
{
	return rate;
}

static int v2m_osc1_set(struct clk *clk, unsigned long rate)
{
	return v2m_cfg_write(SYS_CFG_OSC | SYS_CFG_SITE_MB | 1, rate);
}

static const struct clk_ops osc1_clk_ops = {
	.round	= v2m_osc_round,
	.set	= v2m_osc1_set,
};

static struct clk osc1_clk = {
	.ops	= &osc1_clk_ops,
	.rate	= 24000000,
};

static struct clk osc2_clk = {
	.rate	= 24000000,
};

static struct clk v2m_sp804_clk = {
	.rate	= 1000000,
};

static struct clk v2m_ref_clk = {
	.rate   = 32768,
};

static struct clk dummy_apb_pclk;

static struct clk_lookup v2m_lookups[] = {
	{	/* AMBA bus clock */
		.con_id		= "apb_pclk",
		.clk		= &dummy_apb_pclk,
	}, {	/* UART0 */
		.dev_id		= "mb:uart0",
		.clk		= &osc2_clk,
	}, {	/* UART1 */
		.dev_id		= "mb:uart1",
		.clk		= &osc2_clk,
	}, {	/* UART2 */
		.dev_id		= "mb:uart2",
		.clk		= &osc2_clk,
	}, {	/* UART3 */
		.dev_id		= "mb:uart3",
		.clk		= &osc2_clk,
	}, {	/* KMI0 */
		.dev_id		= "mb:kmi0",
		.clk		= &osc2_clk,
	}, {	/* KMI1 */
		.dev_id		= "mb:kmi1",
		.clk		= &osc2_clk,
	}, {	/* MMC0 */
		.dev_id		= "mb:mmci",
		.clk		= &osc2_clk,
	}, {	/* CLCD */
		.dev_id		= "mb:clcd",
		.clk		= &osc1_clk,
	}, {	/* SP805 WDT */
		.dev_id		= "mb:wdt",
		.clk		= &v2m_ref_clk,
	}, {	/* SP804 timers */
		.dev_id		= "sp804",
		.con_id		= "v2m-timer0",
		.clk		= &v2m_sp804_clk,
	}, {	/* SP804 timers */
		.dev_id		= "sp804",
		.con_id		= "v2m-timer1",
		.clk		= &v2m_sp804_clk,
	},
};

static void __init v2m_init_early(void)
{
	ct_desc->init_early();
	clkdev_add_table(v2m_lookups, ARRAY_SIZE(v2m_lookups));
	versatile_sched_clock_init(MMIO_P2V(V2M_SYS_24MHZ), 24000000);
}

static void v2m_power_off(void)
{
	if (v2m_cfg_write(SYS_CFG_SHUTDOWN | SYS_CFG_SITE_MB, 0))
		printk(KERN_EMERG "Unable to shutdown\n");
}

static void v2m_restart(char str, const char *cmd)
{
	if (v2m_cfg_write(SYS_CFG_REBOOT | SYS_CFG_SITE_MB, 0))
		printk(KERN_EMERG "Unable to reboot\n");
}

struct ct_desc *ct_desc;

static struct ct_desc *ct_descs[] __initdata = {
#ifdef CONFIG_ARCH_VEXPRESS_CA9X4
	&ct_ca9x4_desc,
#endif
};

static void __init v2m_populate_ct_desc(void)
{
	int i;
	u32 current_tile_id;

	ct_desc = NULL;
	current_tile_id = readl(MMIO_P2V(V2M_SYS_PROCID0)) & V2M_CT_ID_MASK;

	for (i = 0; i < ARRAY_SIZE(ct_descs) && !ct_desc; ++i)
		if (ct_descs[i]->id == current_tile_id)
			ct_desc = ct_descs[i];

	if (!ct_desc)
		panic("vexpress: failed to populate core tile description "
		      "for tile ID 0x%8x\n", current_tile_id);
}

static void __init v2m_map_io(void)
{
	iotable_init(v2m_io_desc, ARRAY_SIZE(v2m_io_desc));
	v2m_populate_ct_desc();
	ct_desc->map_io();
}

static void __init v2m_init_irq(void)
{
	ct_desc->init_irq();
}

static void __init v2m_init(void)
{
	int i;

	platform_device_register(&v2m_pcie_i2c_device);
	platform_device_register(&v2m_ddc_i2c_device);
	platform_device_register(&v2m_flash_device);
	platform_device_register(&v2m_cf_device);
	platform_device_register(&v2m_eth_device);
	platform_device_register(&v2m_usb_device);

	for (i = 0; i < ARRAY_SIZE(v2m_amba_devs); i++)
		amba_device_register(v2m_amba_devs[i], &iomem_resource);

	pm_power_off = v2m_power_off;
	arm_pm_restart = v2m_restart;

	ct_desc->init_tile();
}

MACHINE_START(VEXPRESS, "ARM-Versatile Express")
	.atag_offset	= 0x100,
	.map_io		= v2m_map_io,
	.init_early	= v2m_init_early,
	.init_irq	= v2m_init_irq,
	.timer		= &v2m_timer,
	.init_machine	= v2m_init,
MACHINE_END