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linux/arch/arm/mach-realview/realview_eb.c
Linus Walleij f9a6aa4303 clk: convert ARM RealView to common clk 
This converts the ARM RealView machine over to using the common
clock. The approach is similar to the one used for the Integrator,
and we're reusing the ICST wrapper code.

We have to put the clock intialization in the timer init function
for the clocks to be available when initializing the timer,
keeping them in early_init() is too early for the common clk.

Since we now have to go down and compile drivers/clk/versatile
a CONFIG_COMMON_CLK_VERSATILE symbol has been added so the proper
code gets compiled into the kernel for either machine. A leftover
CLK_VERSATILE in the Integrator Kconfig was fixed up to use
the new symbol as well.

Tested on ARM RealView PB1176.

Cc: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-08-24 17:42:10 -07:00

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/*
* linux/arch/arm/mach-realview/realview_eb.c
*
* Copyright (C) 2004 ARM Limited
* Copyright (C) 2000 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, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl061.h>
#include <linux/amba/mmci.h>
#include <linux/amba/pl022.h>
#include <linux/io.h>
#include <linux/platform_data/clk-realview.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/pmu.h>
#include <asm/pgtable.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/smp_twd.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <mach/board-eb.h>
#include <mach/irqs.h>
#include "core.h"
static struct map_desc realview_eb_io_desc[] __initdata = {
{
.virtual = IO_ADDRESS(REALVIEW_SYS_BASE),
.pfn = __phys_to_pfn(REALVIEW_SYS_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB_GIC_CPU_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_GIC_CPU_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB_GIC_DIST_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_GIC_DIST_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_SCTL_BASE),
.pfn = __phys_to_pfn(REALVIEW_SCTL_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB_TIMER0_1_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_TIMER0_1_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB_TIMER2_3_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_TIMER2_3_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#ifdef CONFIG_DEBUG_LL
{
.virtual = IO_ADDRESS(REALVIEW_EB_UART0_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB_UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}
#endif
};
static struct map_desc realview_eb11mp_io_desc[] __initdata = {
{
.virtual = IO_ADDRESS(REALVIEW_EB11MP_PRIV_MEM_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB11MP_PRIV_MEM_BASE),
.length = REALVIEW_EB11MP_PRIV_MEM_SIZE,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_EB11MP_L220_BASE),
.pfn = __phys_to_pfn(REALVIEW_EB11MP_L220_BASE),
.length = SZ_8K,
.type = MT_DEVICE,
}
};
static void __init realview_eb_map_io(void)
{
iotable_init(realview_eb_io_desc, ARRAY_SIZE(realview_eb_io_desc));
if (core_tile_eb11mp() || core_tile_a9mp())
iotable_init(realview_eb11mp_io_desc, ARRAY_SIZE(realview_eb11mp_io_desc));
}
static struct pl061_platform_data gpio0_plat_data = {
.gpio_base = 0,
};
static struct pl061_platform_data gpio1_plat_data = {
.gpio_base = 8,
};
static struct pl061_platform_data gpio2_plat_data = {
.gpio_base = 16,
};
static struct pl022_ssp_controller ssp0_plat_data = {
.bus_id = 0,
.enable_dma = 0,
.num_chipselect = 1,
};
/*
* RealView EB AMBA devices
*/
/*
* These devices are connected via the core APB bridge
*/
#define GPIO2_IRQ { IRQ_EB_GPIO2 }
#define GPIO3_IRQ { IRQ_EB_GPIO3 }
#define AACI_IRQ { IRQ_EB_AACI }
#define MMCI0_IRQ { IRQ_EB_MMCI0A, IRQ_EB_MMCI0B }
#define KMI0_IRQ { IRQ_EB_KMI0 }
#define KMI1_IRQ { IRQ_EB_KMI1 }
/*
* These devices are connected directly to the multi-layer AHB switch
*/
#define EB_SMC_IRQ { }
#define MPMC_IRQ { }
#define EB_CLCD_IRQ { IRQ_EB_CLCD }
#define DMAC_IRQ { IRQ_EB_DMA }
/*
* These devices are connected via the core APB bridge
*/
#define SCTL_IRQ { }
#define EB_WATCHDOG_IRQ { IRQ_EB_WDOG }
#define EB_GPIO0_IRQ { IRQ_EB_GPIO0 }
#define GPIO1_IRQ { IRQ_EB_GPIO1 }
#define EB_RTC_IRQ { IRQ_EB_RTC }
/*
* These devices are connected via the DMA APB bridge
*/
#define SCI_IRQ { IRQ_EB_SCI }
#define EB_UART0_IRQ { IRQ_EB_UART0 }
#define EB_UART1_IRQ { IRQ_EB_UART1 }
#define EB_UART2_IRQ { IRQ_EB_UART2 }
#define EB_UART3_IRQ { IRQ_EB_UART3 }
#define EB_SSP_IRQ { IRQ_EB_SSP }
/* FPGA Primecells */
APB_DEVICE(aaci, "fpga:aaci", AACI, NULL);
APB_DEVICE(mmc0, "fpga:mmc0", MMCI0, &realview_mmc0_plat_data);
APB_DEVICE(kmi0, "fpga:kmi0", KMI0, NULL);
APB_DEVICE(kmi1, "fpga:kmi1", KMI1, NULL);
APB_DEVICE(uart3, "fpga:uart3", EB_UART3, NULL);
/* DevChip Primecells */
AHB_DEVICE(smc, "dev:smc", EB_SMC, NULL);
AHB_DEVICE(clcd, "dev:clcd", EB_CLCD, &clcd_plat_data);
AHB_DEVICE(dmac, "dev:dmac", DMAC, NULL);
AHB_DEVICE(sctl, "dev:sctl", SCTL, NULL);
APB_DEVICE(wdog, "dev:wdog", EB_WATCHDOG, NULL);
APB_DEVICE(gpio0, "dev:gpio0", EB_GPIO0, &gpio0_plat_data);
APB_DEVICE(gpio1, "dev:gpio1", GPIO1, &gpio1_plat_data);
APB_DEVICE(gpio2, "dev:gpio2", GPIO2, &gpio2_plat_data);
APB_DEVICE(rtc, "dev:rtc", EB_RTC, NULL);
APB_DEVICE(sci0, "dev:sci0", SCI, NULL);
APB_DEVICE(uart0, "dev:uart0", EB_UART0, NULL);
APB_DEVICE(uart1, "dev:uart1", EB_UART1, NULL);
APB_DEVICE(uart2, "dev:uart2", EB_UART2, NULL);
APB_DEVICE(ssp0, "dev:ssp0", EB_SSP, &ssp0_plat_data);
static struct amba_device *amba_devs[] __initdata = {
&dmac_device,
&uart0_device,
&uart1_device,
&uart2_device,
&uart3_device,
&smc_device,
&clcd_device,
&sctl_device,
&wdog_device,
&gpio0_device,
&gpio1_device,
&gpio2_device,
&rtc_device,
&sci0_device,
&ssp0_device,
&aaci_device,
&mmc0_device,
&kmi0_device,
&kmi1_device,
};
/*
* RealView EB platform devices
*/
static struct resource realview_eb_flash_resource = {
.start = REALVIEW_EB_FLASH_BASE,
.end = REALVIEW_EB_FLASH_BASE + REALVIEW_EB_FLASH_SIZE - 1,
.flags = IORESOURCE_MEM,
};
static struct resource realview_eb_eth_resources[] = {
[0] = {
.start = REALVIEW_EB_ETH_BASE,
.end = REALVIEW_EB_ETH_BASE + SZ_64K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_EB_ETH,
.end = IRQ_EB_ETH,
.flags = IORESOURCE_IRQ,
},
};
/*
* Detect and register the correct Ethernet device. RealView/EB rev D
* platforms use the newer SMSC LAN9118 Ethernet chip
*/
static int eth_device_register(void)
{
void __iomem *eth_addr = ioremap(REALVIEW_EB_ETH_BASE, SZ_4K);
const char *name = NULL;
u32 idrev;
if (!eth_addr)
return -ENOMEM;
idrev = readl(eth_addr + 0x50);
if ((idrev & 0xFFFF0000) != 0x01180000)
/* SMSC LAN9118 not present, use LAN91C111 instead */
name = "smc91x";
iounmap(eth_addr);
return realview_eth_register(name, realview_eb_eth_resources);
}
static struct resource realview_eb_isp1761_resources[] = {
[0] = {
.start = REALVIEW_EB_USB_BASE,
.end = REALVIEW_EB_USB_BASE + SZ_128K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_EB_USB,
.end = IRQ_EB_USB,
.flags = IORESOURCE_IRQ,
},
};
static struct resource pmu_resources[] = {
[0] = {
.start = IRQ_EB11MP_PMU_CPU0,
.end = IRQ_EB11MP_PMU_CPU0,
.flags = IORESOURCE_IRQ,
},
[1] = {
.start = IRQ_EB11MP_PMU_CPU1,
.end = IRQ_EB11MP_PMU_CPU1,
.flags = IORESOURCE_IRQ,
},
[2] = {
.start = IRQ_EB11MP_PMU_CPU2,
.end = IRQ_EB11MP_PMU_CPU2,
.flags = IORESOURCE_IRQ,
},
[3] = {
.start = IRQ_EB11MP_PMU_CPU3,
.end = IRQ_EB11MP_PMU_CPU3,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device pmu_device = {
.name = "arm-pmu",
.id = ARM_PMU_DEVICE_CPU,
.num_resources = ARRAY_SIZE(pmu_resources),
.resource = pmu_resources,
};
static struct resource char_lcd_resources[] = {
{
.start = REALVIEW_CHAR_LCD_BASE,
.end = (REALVIEW_CHAR_LCD_BASE + SZ_4K - 1),
.flags = IORESOURCE_MEM,
},
{
.start = IRQ_EB_CHARLCD,
.end = IRQ_EB_CHARLCD,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device char_lcd_device = {
.name = "arm-charlcd",
.id = -1,
.num_resources = ARRAY_SIZE(char_lcd_resources),
.resource = char_lcd_resources,
};
static void __init gic_init_irq(void)
{
if (core_tile_eb11mp() || core_tile_a9mp()) {
unsigned int pldctrl;
/* new irq mode */
writel(0x0000a05f, __io_address(REALVIEW_SYS_LOCK));
pldctrl = readl(__io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
pldctrl |= 0x00800000;
writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + REALVIEW_EB11MP_SYS_PLD_CTRL1);
writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
/* core tile GIC, primary */
gic_init(0, 29, __io_address(REALVIEW_EB11MP_GIC_DIST_BASE),
__io_address(REALVIEW_EB11MP_GIC_CPU_BASE));
#ifndef CONFIG_REALVIEW_EB_ARM11MP_REVB
/* board GIC, secondary */
gic_init(1, 96, __io_address(REALVIEW_EB_GIC_DIST_BASE),
__io_address(REALVIEW_EB_GIC_CPU_BASE));
gic_cascade_irq(1, IRQ_EB11MP_EB_IRQ1);
#endif
} else {
/* board GIC, primary */
gic_init(0, 29, __io_address(REALVIEW_EB_GIC_DIST_BASE),
__io_address(REALVIEW_EB_GIC_CPU_BASE));
}
}
/*
* Fix up the IRQ numbers for the RealView EB/ARM11MPCore tile
*/
static void realview_eb11mp_fixup(void)
{
/* AMBA devices */
dmac_device.irq[0] = IRQ_EB11MP_DMA;
uart0_device.irq[0] = IRQ_EB11MP_UART0;
uart1_device.irq[0] = IRQ_EB11MP_UART1;
uart2_device.irq[0] = IRQ_EB11MP_UART2;
uart3_device.irq[0] = IRQ_EB11MP_UART3;
clcd_device.irq[0] = IRQ_EB11MP_CLCD;
wdog_device.irq[0] = IRQ_EB11MP_WDOG;
gpio0_device.irq[0] = IRQ_EB11MP_GPIO0;
gpio1_device.irq[0] = IRQ_EB11MP_GPIO1;
gpio2_device.irq[0] = IRQ_EB11MP_GPIO2;
rtc_device.irq[0] = IRQ_EB11MP_RTC;
sci0_device.irq[0] = IRQ_EB11MP_SCI;
ssp0_device.irq[0] = IRQ_EB11MP_SSP;
aaci_device.irq[0] = IRQ_EB11MP_AACI;
mmc0_device.irq[0] = IRQ_EB11MP_MMCI0A;
mmc0_device.irq[1] = IRQ_EB11MP_MMCI0B;
kmi0_device.irq[0] = IRQ_EB11MP_KMI0;
kmi1_device.irq[0] = IRQ_EB11MP_KMI1;
/* platform devices */
realview_eb_eth_resources[1].start = IRQ_EB11MP_ETH;
realview_eb_eth_resources[1].end = IRQ_EB11MP_ETH;
realview_eb_isp1761_resources[1].start = IRQ_EB11MP_USB;
realview_eb_isp1761_resources[1].end = IRQ_EB11MP_USB;
}
#ifdef CONFIG_HAVE_ARM_TWD
static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
REALVIEW_EB11MP_TWD_BASE,
IRQ_LOCALTIMER);
static void __init realview_eb_twd_init(void)
{
if (core_tile_eb11mp() || core_tile_a9mp()) {
int err = twd_local_timer_register(&twd_local_timer);
if (err)
pr_err("twd_local_timer_register failed %d\n", err);
}
}
#else
#define realview_eb_twd_init() do { } while(0)
#endif
static void __init realview_eb_timer_init(void)
{
unsigned int timer_irq;
timer0_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE);
timer1_va_base = __io_address(REALVIEW_EB_TIMER0_1_BASE) + 0x20;
timer2_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_EB_TIMER2_3_BASE) + 0x20;
if (core_tile_eb11mp() || core_tile_a9mp())
timer_irq = IRQ_EB11MP_TIMER0_1;
else
timer_irq = IRQ_EB_TIMER0_1;
realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
realview_timer_init(timer_irq);
realview_eb_twd_init();
}
static struct sys_timer realview_eb_timer = {
.init = realview_eb_timer_init,
};
static void realview_eb_restart(char mode, const char *cmd)
{
void __iomem *reset_ctrl = __io_address(REALVIEW_SYS_RESETCTL);
void __iomem *lock_ctrl = __io_address(REALVIEW_SYS_LOCK);
/*
* To reset, we hit the on-board reset register
* in the system FPGA
*/
__raw_writel(REALVIEW_SYS_LOCK_VAL, lock_ctrl);
if (core_tile_eb11mp())
__raw_writel(0x0008, reset_ctrl);
dsb();
}
static void __init realview_eb_init(void)
{
int i;
if (core_tile_eb11mp() || core_tile_a9mp()) {
realview_eb11mp_fixup();
#ifdef CONFIG_CACHE_L2X0
/* 1MB (128KB/way), 8-way associativity, evmon/parity/share enabled
* Bits: .... ...0 0111 1001 0000 .... .... .... */
l2x0_init(__io_address(REALVIEW_EB11MP_L220_BASE), 0x00790000, 0xfe000fff);
#endif
platform_device_register(&pmu_device);
}
realview_flash_register(&realview_eb_flash_resource, 1);
platform_device_register(&realview_i2c_device);
platform_device_register(&char_lcd_device);
eth_device_register();
realview_usb_register(realview_eb_isp1761_resources);
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
struct amba_device *d = amba_devs[i];
amba_device_register(d, &iomem_resource);
}
#ifdef CONFIG_LEDS
leds_event = realview_leds_event;
#endif
}
MACHINE_START(REALVIEW_EB, "ARM-RealView EB")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.atag_offset = 0x100,
.fixup = realview_fixup,
.map_io = realview_eb_map_io,
.init_early = realview_init_early,
.init_irq = gic_init_irq,
.timer = &realview_eb_timer,
.handle_irq = gic_handle_irq,
.init_machine = realview_eb_init,
#ifdef CONFIG_ZONE_DMA
.dma_zone_size = SZ_256M,
#endif
.restart = realview_eb_restart,
MACHINE_END
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