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linux-next/arch/arm/mach-integrator/integrator_cp.c
Linus Walleij a613163dff ARM: integrator: convert to common clock 
This converts the Integrator platform to use common clock
and the ICST driver. Since from this point not all ARM
reference platforms use the clock, we define
CONFIG_PLAT_VERSATILE_CLOCK and select it for all platforms
except the Integrator.

Open issue: I could not use the .init_early() field of the
machine descriptor to initialize the clocks, but had to
move them to .init_irq(), so presumably .init_early() is
so early that common clock is not up, and .init_machine()
is too late since it's needed for the clockevent/clocksource
initialization. Any suggestions on how to solve this is
very welcome.

Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[mturquette@linaro.org: use 'select' instead of versatile Kconfig]
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2012-07-11 17:58:45 -07:00

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/*
* linux/arch/arm/mach-integrator/integrator_cp.c
*
* Copyright (C) 2003 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.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/amba/kmi.h>
#include <linux/amba/clcd.h>
#include <linux/amba/mmci.h>
#include <linux/io.h>
#include <linux/gfp.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_data/clk-integrator.h>
#include <mach/hardware.h>
#include <mach/platform.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/hardware/arm_timer.h>
#include <asm/hardware/icst.h>
#include <mach/cm.h>
#include <mach/lm.h>
#include <mach/irqs.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <asm/hardware/timer-sp.h>
#include <plat/clcd.h>
#include <plat/fpga-irq.h>
#include <plat/sched_clock.h>
#include "common.h"
#define INTCP_PA_FLASH_BASE 0x24000000
#define INTCP_FLASH_SIZE SZ_32M
#define INTCP_PA_CLCD_BASE 0xc0000000
#define INTCP_VA_CIC_BASE __io_address(INTEGRATOR_HDR_BASE + 0x40)
#define INTCP_VA_PIC_BASE __io_address(INTEGRATOR_IC_BASE)
#define INTCP_VA_SIC_BASE __io_address(INTEGRATOR_CP_SIC_BASE)
#define INTCP_ETH_SIZE 0x10
#define INTCP_VA_CTRL_BASE IO_ADDRESS(INTEGRATOR_CP_CTL_BASE)
#define INTCP_FLASHPROG 0x04
#define CINTEGRATOR_FLASHPROG_FLVPPEN (1 << 0)
#define CINTEGRATOR_FLASHPROG_FLWREN (1 << 1)
/*
* Logical Physical
* f1000000 10000000 Core module registers
* f1100000 11000000 System controller registers
* f1200000 12000000 EBI registers
* f1300000 13000000 Counter/Timer
* f1400000 14000000 Interrupt controller
* f1600000 16000000 UART 0
* f1700000 17000000 UART 1
* f1a00000 1a000000 Debug LEDs
* fc900000 c9000000 GPIO
* fca00000 ca000000 SIC
* fcb00000 cb000000 CP system control
*/
static struct map_desc intcp_io_desc[] __initdata = {
{
.virtual = IO_ADDRESS(INTEGRATOR_HDR_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_HDR_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_SC_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_SC_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_EBI_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_EBI_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_CT_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_CT_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_UART1_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_UART1_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_CP_GPIO_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_CP_GPIO_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_CP_SIC_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_CP_SIC_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = IO_ADDRESS(INTEGRATOR_CP_CTL_BASE),
.pfn = __phys_to_pfn(INTEGRATOR_CP_CTL_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}
};
static void __init intcp_map_io(void)
{
iotable_init(intcp_io_desc, ARRAY_SIZE(intcp_io_desc));
}
static void __init intcp_init_irq(void)
{
u32 pic_mask, cic_mask, sic_mask;
/* These masks are for the HW IRQ registers */
pic_mask = ~((~0u) << (11 - IRQ_PIC_START));
pic_mask |= (~((~0u) << (29 - 22))) << 22;
cic_mask = ~((~0u) << (1 + IRQ_CIC_END - IRQ_CIC_START));
sic_mask = ~((~0u) << (1 + IRQ_SIC_END - IRQ_SIC_START));
/*
* Disable all interrupt sources
*/
writel(0xffffffff, INTCP_VA_PIC_BASE + IRQ_ENABLE_CLEAR);
writel(0xffffffff, INTCP_VA_PIC_BASE + FIQ_ENABLE_CLEAR);
writel(0xffffffff, INTCP_VA_CIC_BASE + IRQ_ENABLE_CLEAR);
writel(0xffffffff, INTCP_VA_CIC_BASE + FIQ_ENABLE_CLEAR);
writel(sic_mask, INTCP_VA_SIC_BASE + IRQ_ENABLE_CLEAR);
writel(sic_mask, INTCP_VA_SIC_BASE + FIQ_ENABLE_CLEAR);
fpga_irq_init(INTCP_VA_PIC_BASE, "PIC", IRQ_PIC_START,
-1, pic_mask, NULL);
fpga_irq_init(INTCP_VA_CIC_BASE, "CIC", IRQ_CIC_START,
-1, cic_mask, NULL);
fpga_irq_init(INTCP_VA_SIC_BASE, "SIC", IRQ_SIC_START,
IRQ_CP_CPPLDINT, sic_mask, NULL);
integrator_clk_init(true);
}
/*
* Flash handling.
*/
static int intcp_flash_init(struct platform_device *dev)
{
u32 val;
val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
val |= CINTEGRATOR_FLASHPROG_FLWREN;
writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
return 0;
}
static void intcp_flash_exit(struct platform_device *dev)
{
u32 val;
val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
val &= ~(CINTEGRATOR_FLASHPROG_FLVPPEN|CINTEGRATOR_FLASHPROG_FLWREN);
writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
}
static void intcp_flash_set_vpp(struct platform_device *pdev, int on)
{
u32 val;
val = readl(INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
if (on)
val |= CINTEGRATOR_FLASHPROG_FLVPPEN;
else
val &= ~CINTEGRATOR_FLASHPROG_FLVPPEN;
writel(val, INTCP_VA_CTRL_BASE + INTCP_FLASHPROG);
}
static struct physmap_flash_data intcp_flash_data = {
.width = 4,
.init = intcp_flash_init,
.exit = intcp_flash_exit,
.set_vpp = intcp_flash_set_vpp,
};
static struct resource intcp_flash_resource = {
.start = INTCP_PA_FLASH_BASE,
.end = INTCP_PA_FLASH_BASE + INTCP_FLASH_SIZE - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device intcp_flash_device = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &intcp_flash_data,
},
.num_resources = 1,
.resource = &intcp_flash_resource,
};
static struct resource smc91x_resources[] = {
[0] = {
.start = INTEGRATOR_CP_ETH_BASE,
.end = INTEGRATOR_CP_ETH_BASE + INTCP_ETH_SIZE - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_CP_ETHINT,
.end = IRQ_CP_ETHINT,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device smc91x_device = {
.name = "smc91x",
.id = 0,
.num_resources = ARRAY_SIZE(smc91x_resources),
.resource = smc91x_resources,
};
static struct platform_device *intcp_devs[] __initdata = {
&intcp_flash_device,
&smc91x_device,
};
/*
* It seems that the card insertion interrupt remains active after
* we've acknowledged it. We therefore ignore the interrupt, and
* rely on reading it from the SIC. This also means that we must
* clear the latched interrupt.
*/
static unsigned int mmc_status(struct device *dev)
{
unsigned int status = readl(IO_ADDRESS(0xca000000 + 4));
writel(8, IO_ADDRESS(INTEGRATOR_CP_CTL_BASE + 8));
return status & 8;
}
static struct mmci_platform_data mmc_data = {
.ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34,
.status = mmc_status,
.gpio_wp = -1,
.gpio_cd = -1,
};
#define INTEGRATOR_CP_MMC_IRQS { IRQ_CP_MMCIINT0, IRQ_CP_MMCIINT1 }
#define INTEGRATOR_CP_AACI_IRQS { IRQ_CP_AACIINT }
static AMBA_APB_DEVICE(mmc, "mmci", 0, INTEGRATOR_CP_MMC_BASE,
INTEGRATOR_CP_MMC_IRQS, &mmc_data);
static AMBA_APB_DEVICE(aaci, "aaci", 0, INTEGRATOR_CP_AACI_BASE,
INTEGRATOR_CP_AACI_IRQS, NULL);
/*
* CLCD support
*/
/*
* Ensure VGA is selected.
*/
static void cp_clcd_enable(struct clcd_fb *fb)
{
struct fb_var_screeninfo *var = &fb->fb.var;
u32 val = CM_CTRL_STATIC1 | CM_CTRL_STATIC2;
if (var->bits_per_pixel <= 8 ||
(var->bits_per_pixel == 16 && var->green.length == 5))
/* Pseudocolor, RGB555, BGR555 */
val |= CM_CTRL_LCDMUXSEL_VGA555_TFT555;
else if (fb->fb.var.bits_per_pixel <= 16)
/* truecolor RGB565 */
val |= CM_CTRL_LCDMUXSEL_VGA565_TFT555;
else
val = 0; /* no idea for this, don't trust the docs */
cm_control(CM_CTRL_LCDMUXSEL_MASK|
CM_CTRL_LCDEN0|
CM_CTRL_LCDEN1|
CM_CTRL_STATIC1|
CM_CTRL_STATIC2|
CM_CTRL_STATIC|
CM_CTRL_n24BITEN, val);
}
static int cp_clcd_setup(struct clcd_fb *fb)
{
fb->panel = versatile_clcd_get_panel("VGA");
if (!fb->panel)
return -EINVAL;
return versatile_clcd_setup_dma(fb, SZ_1M);
}
static struct clcd_board clcd_data = {
.name = "Integrator/CP",
.caps = CLCD_CAP_5551 | CLCD_CAP_RGB565 | CLCD_CAP_888,
.check = clcdfb_check,
.decode = clcdfb_decode,
.enable = cp_clcd_enable,
.setup = cp_clcd_setup,
.mmap = versatile_clcd_mmap_dma,
.remove = versatile_clcd_remove_dma,
};
static AMBA_AHB_DEVICE(clcd, "clcd", 0, INTCP_PA_CLCD_BASE,
{ IRQ_CP_CLCDCINT }, &clcd_data);
static struct amba_device *amba_devs[] __initdata = {
&mmc_device,
&aaci_device,
&clcd_device,
};
#define REFCOUNTER (__io_address(INTEGRATOR_HDR_BASE) + 0x28)
static void __init intcp_init_early(void)
{
#ifdef CONFIG_PLAT_VERSATILE_SCHED_CLOCK
versatile_sched_clock_init(REFCOUNTER, 24000000);
#endif
}
static void __init intcp_init(void)
{
int i;
platform_add_devices(intcp_devs, ARRAY_SIZE(intcp_devs));
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
struct amba_device *d = amba_devs[i];
amba_device_register(d, &iomem_resource);
}
}
#define TIMER0_VA_BASE __io_address(INTEGRATOR_TIMER0_BASE)
#define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
#define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
static void __init intcp_timer_init(void)
{
writel(0, TIMER0_VA_BASE + TIMER_CTRL);
writel(0, TIMER1_VA_BASE + TIMER_CTRL);
writel(0, TIMER2_VA_BASE + TIMER_CTRL);
sp804_clocksource_init(TIMER2_VA_BASE, "timer2");
sp804_clockevents_init(TIMER1_VA_BASE, IRQ_TIMERINT1, "timer1");
}
static struct sys_timer cp_timer = {
.init = intcp_timer_init,
};
MACHINE_START(CINTEGRATOR, "ARM-IntegratorCP")
/* Maintainer: ARM Ltd/Deep Blue Solutions Ltd */
.atag_offset = 0x100,
.reserve = integrator_reserve,
.map_io = intcp_map_io,
.nr_irqs = NR_IRQS_INTEGRATOR_CP,
.init_early = intcp_init_early,
.init_irq = intcp_init_irq,
.handle_irq = fpga_handle_irq,
.timer = &cp_timer,
.init_machine = intcp_init,
.restart = integrator_restart,
MACHINE_END
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