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linux/arch/arm/mach-realview/realview_pbx.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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/*
* arch/arm/mach-realview/realview_pbx.c
*
* Copyright (C) 2009 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 version 2 as
* published by the Free Software Foundation.
*
* 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 <asm/irq.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/pmu.h>
#include <asm/smp_twd.h>
#include <asm/pgtable.h>
#include <asm/hardware/gic.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <mach/hardware.h>
#include <mach/board-pbx.h>
#include <mach/irqs.h>
#include "core.h"
static struct map_desc realview_pbx_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_PBX_GIC_CPU_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_GIC_CPU_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_PBX_GIC_DIST_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_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_PBX_TIMER0_1_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_TIMER0_1_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_PBX_TIMER2_3_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_TIMER2_3_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#ifdef CONFIG_PCI
{
.virtual = PCIX_UNIT_BASE,
.pfn = __phys_to_pfn(REALVIEW_PBX_PCI_BASE),
.length = REALVIEW_PBX_PCI_BASE_SIZE,
.type = MT_DEVICE,
},
#endif
#ifdef CONFIG_DEBUG_LL
{
.virtual = IO_ADDRESS(REALVIEW_PBX_UART0_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
},
#endif
};
static struct map_desc realview_local_io_desc[] __initdata = {
{
.virtual = IO_ADDRESS(REALVIEW_PBX_TILE_SCU_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_TILE_SCU_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_PBX_TILE_GIC_DIST_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_TILE_GIC_DIST_BASE),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = IO_ADDRESS(REALVIEW_PBX_TILE_L220_BASE),
.pfn = __phys_to_pfn(REALVIEW_PBX_TILE_L220_BASE),
.length = SZ_8K,
.type = MT_DEVICE,
}
};
static void __init realview_pbx_map_io(void)
{
iotable_init(realview_pbx_io_desc, ARRAY_SIZE(realview_pbx_io_desc));
if (core_tile_pbx11mp() || core_tile_pbxa9mp())
iotable_init(realview_local_io_desc, ARRAY_SIZE(realview_local_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 PBXCore AMBA devices
*/
#define GPIO2_IRQ { IRQ_PBX_GPIO2 }
#define GPIO3_IRQ { IRQ_PBX_GPIO3 }
#define AACI_IRQ { IRQ_PBX_AACI }
#define MMCI0_IRQ { IRQ_PBX_MMCI0A, IRQ_PBX_MMCI0B }
#define KMI0_IRQ { IRQ_PBX_KMI0 }
#define KMI1_IRQ { IRQ_PBX_KMI1 }
#define PBX_SMC_IRQ { }
#define MPMC_IRQ { }
#define PBX_CLCD_IRQ { IRQ_PBX_CLCD }
#define DMAC_IRQ { IRQ_PBX_DMAC }
#define SCTL_IRQ { }
#define PBX_WATCHDOG_IRQ { IRQ_PBX_WATCHDOG }
#define PBX_GPIO0_IRQ { IRQ_PBX_GPIO0 }
#define GPIO1_IRQ { IRQ_PBX_GPIO1 }
#define PBX_RTC_IRQ { IRQ_PBX_RTC }
#define SCI_IRQ { IRQ_PBX_SCI }
#define PBX_UART0_IRQ { IRQ_PBX_UART0 }
#define PBX_UART1_IRQ { IRQ_PBX_UART1 }
#define PBX_UART2_IRQ { IRQ_PBX_UART2 }
#define PBX_UART3_IRQ { IRQ_PBX_UART3 }
#define PBX_SSP_IRQ { IRQ_PBX_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", PBX_UART3, NULL);
/* DevChip Primecells */
AHB_DEVICE(smc, "dev:smc", PBX_SMC, NULL);
AHB_DEVICE(sctl, "dev:sctl", SCTL, NULL);
APB_DEVICE(wdog, "dev:wdog", PBX_WATCHDOG, NULL);
APB_DEVICE(gpio0, "dev:gpio0", PBX_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", PBX_RTC, NULL);
APB_DEVICE(sci0, "dev:sci0", SCI, NULL);
APB_DEVICE(uart0, "dev:uart0", PBX_UART0, NULL);
APB_DEVICE(uart1, "dev:uart1", PBX_UART1, NULL);
APB_DEVICE(uart2, "dev:uart2", PBX_UART2, NULL);
APB_DEVICE(ssp0, "dev:ssp0", PBX_SSP, &ssp0_plat_data);
/* Primecells on the NEC ISSP chip */
AHB_DEVICE(clcd, "issp:clcd", PBX_CLCD, &clcd_plat_data);
AHB_DEVICE(dmac, "issp:dmac", DMAC, NULL);
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 PB-X platform devices
*/
static struct resource realview_pbx_flash_resources[] = {
[0] = {
.start = REALVIEW_PBX_FLASH0_BASE,
.end = REALVIEW_PBX_FLASH0_BASE + REALVIEW_PBX_FLASH0_SIZE - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = REALVIEW_PBX_FLASH1_BASE,
.end = REALVIEW_PBX_FLASH1_BASE + REALVIEW_PBX_FLASH1_SIZE - 1,
.flags = IORESOURCE_MEM,
},
};
static struct resource realview_pbx_smsc911x_resources[] = {
[0] = {
.start = REALVIEW_PBX_ETH_BASE,
.end = REALVIEW_PBX_ETH_BASE + SZ_64K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PBX_ETH,
.end = IRQ_PBX_ETH,
.flags = IORESOURCE_IRQ,
},
};
static struct resource realview_pbx_isp1761_resources[] = {
[0] = {
.start = REALVIEW_PBX_USB_BASE,
.end = REALVIEW_PBX_USB_BASE + SZ_128K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PBX_USB,
.end = IRQ_PBX_USB,
.flags = IORESOURCE_IRQ,
},
};
static struct resource pmu_resources[] = {
[0] = {
.start = IRQ_PBX_PMU_CPU0,
.end = IRQ_PBX_PMU_CPU0,
.flags = IORESOURCE_IRQ,
},
[1] = {
.start = IRQ_PBX_PMU_CPU1,
.end = IRQ_PBX_PMU_CPU1,
.flags = IORESOURCE_IRQ,
},
[2] = {
.start = IRQ_PBX_PMU_CPU2,
.end = IRQ_PBX_PMU_CPU2,
.flags = IORESOURCE_IRQ,
},
[3] = {
.start = IRQ_PBX_PMU_CPU3,
.end = IRQ_PBX_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 void __init gic_init_irq(void)
{
/* ARM PBX on-board GIC */
if (core_tile_pbx11mp() || core_tile_pbxa9mp()) {
gic_init(0, 29, __io_address(REALVIEW_PBX_TILE_GIC_DIST_BASE),
__io_address(REALVIEW_PBX_TILE_GIC_CPU_BASE));
} else {
gic_init(0, IRQ_PBX_GIC_START,
__io_address(REALVIEW_PBX_GIC_DIST_BASE),
__io_address(REALVIEW_PBX_GIC_CPU_BASE));
}
}
#ifdef CONFIG_HAVE_ARM_TWD
static DEFINE_TWD_LOCAL_TIMER(twd_local_timer,
REALVIEW_PBX_TILE_TWD_BASE,
IRQ_LOCALTIMER);
static void __init realview_pbx_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 realview_pbx_twd_init() do { } while(0)
#endif
static void __init realview_pbx_timer_init(void)
{
timer0_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE);
timer1_va_base = __io_address(REALVIEW_PBX_TIMER0_1_BASE) + 0x20;
timer2_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE);
timer3_va_base = __io_address(REALVIEW_PBX_TIMER2_3_BASE) + 0x20;
realview_clk_init(__io_address(REALVIEW_SYS_BASE), false);
realview_timer_init(IRQ_PBX_TIMER0_1);
realview_pbx_twd_init();
}
static struct sys_timer realview_pbx_timer = {
.init = realview_pbx_timer_init,
};
static void realview_pbx_fixup(struct tag *tags, char **from,
struct meminfo *meminfo)
{
#ifdef CONFIG_SPARSEMEM
/*
* Memory configuration with SPARSEMEM enabled on RealView PBX (see
* asm/mach/memory.h for more information).
*/
meminfo->bank[0].start = 0;
meminfo->bank[0].size = SZ_256M;
meminfo->bank[1].start = 0x20000000;
meminfo->bank[1].size = SZ_512M;
meminfo->bank[2].start = 0x80000000;
meminfo->bank[2].size = SZ_256M;
meminfo->nr_banks = 3;
#else
realview_fixup(tags, from, meminfo);
#endif
}
static void realview_pbx_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);
__raw_writel(0x00F0, reset_ctrl);
__raw_writel(0x00F4, reset_ctrl);
dsb();
}
static void __init realview_pbx_init(void)
{
int i;
#ifdef CONFIG_CACHE_L2X0
if (core_tile_pbxa9mp()) {
void __iomem *l2x0_base =
__io_address(REALVIEW_PBX_TILE_L220_BASE);
/* set RAM latencies to 1 cycle for eASIC */
writel(0, l2x0_base + L2X0_TAG_LATENCY_CTRL);
writel(0, l2x0_base + L2X0_DATA_LATENCY_CTRL);
/* 16KB way size, 8-way associativity, parity disabled
* Bits: .. 0 0 0 0 1 00 1 0 1 001 0 000 0 .... .... .... */
l2x0_init(l2x0_base, 0x02520000, 0xc0000fff);
platform_device_register(&pmu_device);
}
#endif
realview_flash_register(realview_pbx_flash_resources,
ARRAY_SIZE(realview_pbx_flash_resources));
realview_eth_register(NULL, realview_pbx_smsc911x_resources);
platform_device_register(&realview_i2c_device);
platform_device_register(&realview_cf_device);
realview_usb_register(realview_pbx_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_PBX, "ARM-RealView PBX")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.atag_offset = 0x100,
.fixup = realview_pbx_fixup,
.map_io = realview_pbx_map_io,
.init_early = realview_init_early,
.init_irq = gic_init_irq,
.timer = &realview_pbx_timer,
.handle_irq = gic_handle_irq,
.init_machine = realview_pbx_init,
#ifdef CONFIG_ZONE_DMA
.dma_zone_size = SZ_256M,
#endif
.restart = realview_pbx_restart,
MACHINE_END
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