linux/arch/arm/mach-vexpress/v2m.c
Nick Bowler 0ebb962e00 ARM: 7003/1: vexpress: Add clock definition for the SP805.
It seems that an entry for the SP805 watchdog in the table of clocks was
missing.  This results in the sp805_wdt driver rejecting the device with
the following errors:

  sp805-wdt mb:wdt: Clock not found
  sp805-wdt mb:wdt: Probe Failed!!!
  sp805-wdt: probe of mb:wdt failed with error -2

While not obviously stated in the hardware docs, the onboard SP810's
"REFCLK" is connected to a 32.768KHz crystal, and this drives the
watchdog.  Add a struct clk and corresponding lookup entry for it.

Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-08-24 09:45:21 +01:00

453 lines
10 KiB
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")
.boot_params = PLAT_PHYS_OFFSET + 0x00000100,
.map_io = v2m_map_io,
.init_early = v2m_init_early,
.init_irq = v2m_init_irq,
.timer = &v2m_timer,
.init_machine = v2m_init,
MACHINE_END