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[ARM] 5590/1: Add basic support for ST Nomadik 8815 SoC and evaluation board

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This patch adds the basic infrastructure for the Nomadik 8815
CPU and the "Nomadik Hardware Kit" NHK8815. This patch only
includes the serial console and core stuff, no drivers.

Signed-off-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Andrea Gallo <andrea.gallo@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Alessandro Rubini 2009-07-02 19:06:47 +01:00 committed by Russell King
parent 8c81b52422
commit 28ad94ec61
23 changed files with 883 additions and 0 deletions
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15
arch/arm/Kconfig
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@ -327,6 +327,19 @@ config ARCH_H720X
help
This enables support for systems based on the Hynix HMS720x
config ARCH_NOMADIK
bool "STMicroelectronics Nomadik"
select ARM_AMBA
select ARM_VIC
select CPU_ARM926T
select HAVE_CLK
select COMMON_CLKDEV
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
Support for the Nomadik platform by ST-Ericsson
config ARCH_IOP13XX
bool "IOP13xx-based"
depends on MMU
@ -716,6 +729,8 @@ source "arch/arm/mach-at91/Kconfig"
source "arch/arm/plat-mxc/Kconfig"
source "arch/arm/mach-nomadik/Kconfig"
source "arch/arm/mach-netx/Kconfig"
source "arch/arm/mach-ns9xxx/Kconfig"

1
arch/arm/Makefile
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@ -137,6 +137,7 @@ machine-$(CONFIG_ARCH_MX1) := mx1
machine-$(CONFIG_ARCH_MX2) := mx2
machine-$(CONFIG_ARCH_MX3) := mx3
machine-$(CONFIG_ARCH_NETX) := netx
machine-$(CONFIG_ARCH_NOMADIK) := nomadik
machine-$(CONFIG_ARCH_NS9XXX) := ns9xxx
machine-$(CONFIG_ARCH_OMAP1) := omap1
machine-$(CONFIG_ARCH_OMAP2) := omap2

14
arch/arm/mach-nomadik/Kconfig Normal file
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@ -0,0 +1,14 @@
if ARCH_NOMADIK
menu "Nomadik boards"
config MACH_NOMADIK_8815NHK
bool "ST 8815 Nomadik Hardware Kit (evaluation board)"
select NOMADIK_8815
endmenu
config NOMADIK_8815
bool
endif

16
arch/arm/mach-nomadik/Makefile Normal file
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@ -0,0 +1,16 @@
#
# Makefile for the linux kernel.
#
# Note! Dependencies are done automagically by 'make dep', which also
# removes any old dependencies. DON'T put your own dependencies here
# unless it's something special (ie not a .c file).
# Object file lists.
obj-y += clock.o timer.o
# Cpu revision
obj-$(CONFIG_NOMADIK_8815) += cpu-8815.o
# Specific board support
obj-$(CONFIG_MACH_NOMADIK_8815NHK) += board-nhk8815.o

4
arch/arm/mach-nomadik/Makefile.boot Normal file
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@ -0,0 +1,4 @@
zreladdr-y := 0x00008000
params_phys-y := 0x00000100
initrd_phys-y := 0x00800000

75
arch/arm/mach-nomadik/board-nhk8815.c Normal file
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@ -0,0 +1,75 @@
/*
* linux/arch/arm/mach-nomadik/board-8815nhk.c
*
* Copyright (C) STMicroelectronics
*
* 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.
*
* NHK15 board specifc driver definition
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/amba/bus.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <mach/setup.h>
#include "clock.h"
#define __MEM_4K_RESOURCE(x) \
.res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
static struct amba_device uart0_device = {
.dev = { .init_name = "uart0" },
__MEM_4K_RESOURCE(NOMADIK_UART0_BASE),
.irq = {IRQ_UART0, NO_IRQ},
};
static struct amba_device uart1_device = {
.dev = { .init_name = "uart1" },
__MEM_4K_RESOURCE(NOMADIK_UART1_BASE),
.irq = {IRQ_UART1, NO_IRQ},
};
static struct amba_device *amba_devs[] __initdata = {
&uart0_device,
&uart1_device,
};
/* We have a fixed clock alone, by now */
static struct clk nhk8815_clk_48 = {
.rate = 48*1000*1000,
};
static struct platform_device *nhk8815_platform_devices[] __initdata = {
/* currently empty, will add keypad, touchscreen etc */
};
static void __init nhk8815_platform_init(void)
{
int i;
cpu8815_platform_init();
platform_add_devices(nhk8815_platform_devices,
ARRAY_SIZE(nhk8815_platform_devices));
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
nmdk_clk_create(&nhk8815_clk_48, amba_devs[i]->dev.init_name);
amba_device_register(amba_devs[i], &iomem_resource);
}
}
MACHINE_START(NOMADIK, "NHK8815")
/* Maintainer: ST MicroElectronics */
.phys_io = NOMADIK_UART0_BASE,
.io_pg_offst = (IO_ADDRESS(NOMADIK_UART0_BASE) >> 18) & 0xfffc,
.boot_params = 0x100,
.map_io = cpu8815_map_io,
.init_irq = cpu8815_init_irq,
.timer = &nomadik_timer,
.init_machine = nhk8815_platform_init,
MACHINE_END

45
arch/arm/mach-nomadik/clock.c Normal file
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@ -0,0 +1,45 @@
/*
* linux/arch/arm/mach-nomadik/clock.c
*
* Copyright (C) 2009 Alessandro Rubini
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/clk.h>
#include <asm/clkdev.h>
#include "clock.h"
/*
* The nomadik board uses generic clocks, but the serial pl011 file
* calls clk_enable(), clk_disable(), clk_get_rate(), so we provide them
*/
unsigned long clk_get_rate(struct clk *clk)
{
return clk->rate;
}
EXPORT_SYMBOL(clk_get_rate);
/* enable and disable do nothing */
int clk_enable(struct clk *clk)
{
return 0;
}
EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
{
}
EXPORT_SYMBOL(clk_disable);
/* Create a clock structure with the given name */
int nmdk_clk_create(struct clk *clk, const char *dev_id)
{
struct clk_lookup *clkdev;
clkdev = clkdev_alloc(clk, NULL, dev_id);
if (!clkdev)
return -ENOMEM;
clkdev_add(clkdev);
return 0;
}

14
arch/arm/mach-nomadik/clock.h Normal file
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@ -0,0 +1,14 @@
/*
* linux/arch/arm/mach-nomadik/clock.h
*
* Copyright (C) 2009 Alessandro Rubini
*
* 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.
*/
struct clk {
unsigned long rate;
};
extern int nmdk_clk_create(struct clk *clk, const char *dev_id);

58
arch/arm/mach-nomadik/cpu-8815.c Normal file
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@ -0,0 +1,58 @@
/*
* Copyright STMicroelectronics, 2007.
*
* 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/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <asm/mach/map.h>
#include <asm/hardware/vic.h>
/* All SoC devices live in the same area (see hardware.h) */
static struct map_desc nomadik_io_desc[] __initdata = {
{
.virtual = NOMADIK_IO_VIRTUAL,
.pfn = __phys_to_pfn(NOMADIK_IO_PHYSICAL),
.length = NOMADIK_IO_SIZE,
.type = MT_DEVICE,
}
/* static ram and secured ram may be added later */
};
void __init cpu8815_map_io(void)
{
iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
}
void __init cpu8815_init_irq(void)
{
/* This modified VIC cell has two register blocks, at 0 and 0x20 */
vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START + 0, ~0, 0);
vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
}
/*
* This function is called from the board init ("init_machine").
* Currently nothing is done as we can't register amba devs so early.
*/
void __init cpu8815_platform_init(void)
{
return;
}

7
arch/arm/mach-nomadik/include/mach/clkdev.h Normal file
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@ -0,0 +1,7 @@
#ifndef __ASM_MACH_CLKDEV_H
#define __ASM_MACH_CLKDEV_H
#define __clk_get(clk) ({ 1; })
#define __clk_put(clk) do { } while (0)
#endif

22
arch/arm/mach-nomadik/include/mach/debug-macro.S Normal file
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@ -0,0 +1,22 @@
/*
* Debugging macro include header
*
* Copyright (C) 1994-1999 Russell King
* Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
*
* 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.
*
*/
.macro addruart,rx
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
moveq \rx, #0x10000000 @ physical base address
movne \rx, #0xf0000000 @ virtual base
add \rx, \rx, #0x00100000
add \rx, \rx, #0x000fb000
.endm
#include <asm/hardware/debug-pl01x.S>

43
arch/arm/mach-nomadik/include/mach/entry-macro.S Normal file
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@ -0,0 +1,43 @@
/*
* Low-level IRQ helper macros for Nomadik platforms
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <mach/hardware.h>
#include <mach/irqs.h>
.macro disable_fiq
.endm
.macro get_irqnr_preamble, base, tmp
ldr \base, =IO_ADDRESS(NOMADIK_IC_BASE)
.endm
.macro arch_ret_to_user, tmp1, tmp2
.endm
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
/* This stanza gets the irq mask from one of two status registers */
mov \irqnr, #0
ldr \irqstat, [\base, #VIC_REG_IRQSR0] @ get masked status
cmp \irqstat, #0
bne 1001f
add \irqnr, \irqnr, #32
ldr \irqstat, [\base, #VIC_REG_IRQSR1] @ get masked status
1001: tst \irqstat, #15
bne 1002f
add \irqnr, \irqnr, #4
movs \irqstat, \irqstat, lsr #4
bne 1001b
1002: tst \irqstat, #1
bne 1003f
add \irqnr, \irqnr, #1
movs \irqstat, \irqstat, lsr #1
bne 1002b
1003: /* EQ will be set if no irqs pending */
.endm

90
arch/arm/mach-nomadik/include/mach/hardware.h Normal file
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@ -0,0 +1,90 @@
/*
* This file contains the hardware definitions of the Nomadik.
*
* 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
*/
#ifndef __ASM_ARCH_HARDWARE_H
#define __ASM_ARCH_HARDWARE_H
/* Nomadik registers live from 0x1000.0000 to 0x1023.0000 -- currently */
#define NOMADIK_IO_VIRTUAL 0xF0000000 /* VA of IO */
#define NOMADIK_IO_PHYSICAL 0x10000000 /* PA of IO */
#define NOMADIK_IO_SIZE 0x00300000 /* 3MB for all regs */
/* used in C code, so cast to proper type */
#define io_p2v(x) ((void __iomem *)(x) \
- NOMADIK_IO_PHYSICAL + NOMADIK_IO_VIRTUAL)
#define io_v2p(x) ((unsigned long)(x) \
- NOMADIK_IO_VIRTUAL + NOMADIK_IO_PHYSICAL)
/* used in asm code, so no casts */
#define IO_ADDRESS(x) ((x) - NOMADIK_IO_PHYSICAL + NOMADIK_IO_VIRTUAL)
/*
* Base address defination for Nomadik Onchip Logic Block
*/
#define NOMADIK_FSMC_BASE 0x10100000 /* FSMC registers */
#define NOMADIK_SDRAMC_BASE 0x10110000 /* SDRAM Controller */
#define NOMADIK_CLCDC_BASE 0x10120000 /* CLCD Controller */
#define NOMADIK_MDIF_BASE 0x10120000 /* MDIF */
#define NOMADIK_DMA0_BASE 0x10130000 /* DMA0 Controller */
#define NOMADIK_IC_BASE 0x10140000 /* Vectored Irq Controller */
#define NOMADIK_DMA1_BASE 0x10150000 /* DMA1 Controller */
#define NOMADIK_USB_BASE 0x10170000 /* USB-OTG conf reg base */
#define NOMADIK_CRYP_BASE 0x10180000 /* Crypto processor */
#define NOMADIK_SHA1_BASE 0x10190000 /* SHA-1 Processor */
#define NOMADIK_XTI_BASE 0x101A0000 /* XTI */
#define NOMADIK_RNG_BASE 0x101B0000 /* Random number generator */
#define NOMADIK_SRC_BASE 0x101E0000 /* SRC base */
#define NOMADIK_WDOG_BASE 0x101E1000 /* Watchdog */
#define NOMADIK_MTU0_BASE 0x101E2000 /* Multiple Timer 0 */
#define NOMADIK_MTU1_BASE 0x101E3000 /* Multiple Timer 1 */
#define NOMADIK_GPIO0_BASE 0x101E4000 /* GPIO0 */
#define NOMADIK_GPIO1_BASE 0x101E5000 /* GPIO1 */
#define NOMADIK_GPIO2_BASE 0x101E6000 /* GPIO2 */
#define NOMADIK_GPIO3_BASE 0x101E7000 /* GPIO3 */
#define NOMADIK_RTC_BASE 0x101E8000 /* Real Time Clock base */
#define NOMADIK_PMU_BASE 0x101E9000 /* Power Management Unit */
#define NOMADIK_OWM_BASE 0x101EA000 /* One wire master */
#define NOMADIK_SCR_BASE 0x101EF000 /* Secure Control registers */
#define NOMADIK_MSP2_BASE 0x101F0000 /* MSP 2 interface */
#define NOMADIK_MSP1_BASE 0x101F1000 /* MSP 1 interface */
#define NOMADIK_UART2_BASE 0x101F2000 /* UART 2 interface */
#define NOMADIK_SSIRx_BASE 0x101F3000 /* SSI 8-ch rx interface */
#define NOMADIK_SSITx_BASE 0x101F4000 /* SSI 8-ch tx interface */
#define NOMADIK_MSHC_BASE 0x101F5000 /* Memory Stick(Pro) Host */
#define NOMADIK_SDI_BASE 0x101F6000 /* SD-card/MM-Card */
#define NOMADIK_I2C1_BASE 0x101F7000 /* I2C1 interface */
#define NOMADIK_I2C0_BASE 0x101F8000 /* I2C0 interface */
#define NOMADIK_MSP0_BASE 0x101F9000 /* MSP 0 interface */
#define NOMADIK_FIRDA_BASE 0x101FA000 /* FIrDA interface */
#define NOMADIK_UART1_BASE 0x101FB000 /* UART 1 interface */
#define NOMADIK_SSP_BASE 0x101FC000 /* SSP interface */
#define NOMADIK_UART0_BASE 0x101FD000 /* UART 0 interface */
#define NOMADIK_SGA_BASE 0x101FE000 /* SGA interface */
#define NOMADIK_L2CC_BASE 0x10210000 /* L2 Cache controller */
/* Other ranges, not for p2v/v2p */
#define NOMADIK_BACKUP_RAM 0x80010000
#define NOMADIK_EBROM 0x80000000 /* Embedded boot ROM */
#define NOMADIK_HAMACV_DMEM_BASE 0xA0100000 /* HAMACV Data Memory Start */
#define NOMADIK_HAMACV_DMEM_END 0xA01FFFFF /* HAMACV Data Memory End */
#define NOMADIK_HAMACA_DMEM 0xA0200000 /* HAMACA Data Memory Space */
#define NOMADIK_FSMC_VA IO_ADDRESS(NOMADIK_FSMC_BASE)
#define NOMADIK_MTU0_VA IO_ADDRESS(NOMADIK_MTU0_BASE)
#define NOMADIK_MTU1_VA IO_ADDRESS(NOMADIK_MTU1_BASE)
#endif /* __ASM_ARCH_HARDWARE_H */

22
arch/arm/mach-nomadik/include/mach/io.h Normal file
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@ -0,0 +1,22 @@
/*
* arch/arm/mach-nomadik/include/mach/io.h (copied from mach-sa1100)
*
* Copyright (C) 1997-1999 Russell King
*
* Modifications:
* 06-12-1997 RMK Created.
* 07-04-1999 RMK Major cleanup
*/
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
#define IO_SPACE_LIMIT 0xffffffff
/*
* We don't actually have real ISA nor PCI buses, but there is so many
* drivers out there that might just work if we fake them...
*/
#define __io(a) __typesafe_io(a)
#define __mem_pci(a) (a)
#endif

82
arch/arm/mach-nomadik/include/mach/irqs.h Normal file
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@ -0,0 +1,82 @@
/*
* mach-nomadik/include/mach/irqs.h
*
* Copyright (C) ST Microelectronics
*
* 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
*/
#ifndef __ASM_ARCH_IRQS_H
#define __ASM_ARCH_IRQS_H
#include <mach/hardware.h>
#define IRQ_VIC_START 0 /* first VIC interrupt is 0 */
/*
* Interrupt numbers generic for all Nomadik Chip cuts
*/
#define IRQ_WATCHDOG 0
#define IRQ_SOFTINT 1
#define IRQ_CRYPTO 2
#define IRQ_OWM 3
#define IRQ_MTU0 4
#define IRQ_MTU1 5
#define IRQ_GPIO0 6
#define IRQ_GPIO1 7
#define IRQ_GPIO2 8
#define IRQ_GPIO3 9
#define IRQ_RTC_RTT 10
#define IRQ_SSP 11
#define IRQ_UART0 12
#define IRQ_DMA1 13
#define IRQ_CLCD_MDIF 14
#define IRQ_DMA0 15
#define IRQ_PWRFAIL 16
#define IRQ_UART1 17
#define IRQ_FIRDA 18
#define IRQ_MSP0 19
#define IRQ_I2C0 20
#define IRQ_I2C1 21
#define IRQ_SDMMC 22
#define IRQ_USBOTG 23
#define IRQ_SVA_IT0 24
#define IRQ_SVA_IT1 25
#define IRQ_SAA_IT0 26
#define IRQ_SAA_IT1 27
#define IRQ_UART2 28
#define IRQ_MSP2 31
#define IRQ_L2CC 48
#define IRQ_HPI 49
#define IRQ_SKE 50
#define IRQ_KP 51
#define IRQ_MEMST 54
#define IRQ_SGA_IT 58
#define IRQ_USBM 60
#define IRQ_MSP1 62
#define NOMADIK_SOC_NR_IRQS 64
/* After chip-specific IRQ numbers we have the GPIO ones */
#define NOMADIK_NR_GPIO 128 /* last 4 not wired to pins */
#define NOMADIK_GPIO_TO_IRQ(gpio) ((gpio) + NOMADIK_SOC_NR_IRQS)
#define NOMADIK_IRQ_TO_GPIO(irq) ((irq) - NOMADIK_SOC_NR_IRQS)
#define NR_IRQS NOMADIK_GPIO_TO_IRQ(NOMADIK_NR_GPIO)
/* Following two are used by entry_macro.S, to access our dual-vic */
#define VIC_REG_IRQSR0 0
#define VIC_REG_IRQSR1 0x20
#endif /* __ASM_ARCH_IRQS_H */

28
arch/arm/mach-nomadik/include/mach/memory.h Normal file
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@ -0,0 +1,28 @@
/*
* mach-nomadik/include/mach/memory.h
*
* Copyright (C) 1999 ARM Limited
*
* 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
*/
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H
/*
* Physical DRAM offset.
*/
#define PHYS_OFFSET UL(0x00000000)
#endif

45
arch/arm/mach-nomadik/include/mach/mtu.h Normal file
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@ -0,0 +1,45 @@
#ifndef __ASM_ARCH_MTU_H
#define __ASM_ARCH_MTU_H
/*
* The MTU device hosts four different counters, with 4 set of
* registers. These are register names.
*/
#define MTU_IMSC 0x00 /* Interrupt mask set/clear */
#define MTU_RIS 0x04 /* Raw interrupt status */
#define MTU_MIS 0x08 /* Masked interrupt status */
#define MTU_ICR 0x0C /* Interrupt clear register */
/* per-timer registers take 0..3 as argument */
#define MTU_LR(x) (0x10 + 0x10 * (x) + 0x00) /* Load value */
#define MTU_VAL(x) (0x10 + 0x10 * (x) + 0x04) /* Current value */
#define MTU_CR(x) (0x10 + 0x10 * (x) + 0x08) /* Control reg */
#define MTU_BGLR(x) (0x10 + 0x10 * (x) + 0x0c) /* At next overflow */
/* bits for the control register */
#define MTU_CRn_ENA 0x80
#define MTU_CRn_PERIODIC 0x40 /* if 0 = free-running */
#define MTU_CRn_PRESCALE_MASK 0x0c
#define MTU_CRn_PRESCALE_1 0x00
#define MTU_CRn_PRESCALE_16 0x04
#define MTU_CRn_PRESCALE_256 0x08
#define MTU_CRn_32BITS 0x02
#define MTU_CRn_ONESHOT 0x01 /* if 0 = wraps reloading from BGLR*/
/* Other registers are usual amba/primecell registers, currently not used */
#define MTU_ITCR 0xff0
#define MTU_ITOP 0xff4
#define MTU_PERIPH_ID0 0xfe0
#define MTU_PERIPH_ID1 0xfe4
#define MTU_PERIPH_ID2 0xfe8
#define MTU_PERIPH_ID3 0xfeC
#define MTU_PCELL0 0xff0
#define MTU_PCELL1 0xff4
#define MTU_PCELL2 0xff8
#define MTU_PCELL3 0xffC
#endif /* __ASM_ARCH_MTU_H */

22
arch/arm/mach-nomadik/include/mach/setup.h Normal file
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@ -0,0 +1,22 @@
/*
* These symbols are needed for board-specific files to call their
* own cpu-specific files
*/
#ifndef __ASM_ARCH_SETUP_H
#define __ASM_ARCH_SETUP_H
#include <asm/mach/time.h>
#include <linux/init.h>
#ifdef CONFIG_NOMADIK_8815
extern void cpu8815_map_io(void);
extern void cpu8815_platform_init(void);
extern void cpu8815_init_irq(void);
extern struct sys_timer nomadik_timer;
#endif /* NOMADIK_8815 */
#endif /* __ASM_ARCH_SETUP_H */

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/*
* mach-nomadik/include/mach/system.h
*
* Copyright (C) 2008 STMicroelectronics
*
* 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
*/
#ifndef __ASM_ARCH_SYSTEM_H
#define __ASM_ARCH_SYSTEM_H
#include <linux/io.h>
#include <mach/hardware.h>
static inline void arch_idle(void)
{
/*
* This should do all the clock switching
* and wait for interrupt tricks
*/
cpu_do_idle();
}
static inline void arch_reset(char mode, const char *cmd)
{
void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18);
/* FIXME: use egpio when implemented */
/* Write anything to Reset status register */
writel(1, src_rstsr);
}
#endif

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#ifndef __ASM_ARCH_TIMEX_H
#define __ASM_ARCH_TIMEX_H
#define CLOCK_TICK_RATE 2400000
#endif

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/*
* Copyright (C) 2008 STMicroelectronics
*
* 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
*/
#ifndef __ASM_ARCH_UNCOMPRESS_H
#define __ASM_ARCH_UNCOMPRESS_H
#include <asm/setup.h>
#include <asm/io.h>
#include <mach/hardware.h>
/* we need the constants in amba/serial.h, but it refers to amba_device */
struct amba_device;
#include <linux/amba/serial.h>
#define NOMADIK_UART_DR 0x101FB000
#define NOMADIK_UART_LCRH 0x101FB02c
#define NOMADIK_UART_CR 0x101FB030
#define NOMADIK_UART_FR 0x101FB018
static void putc(const char c)
{
/* Do nothing if the UART is not enabled. */
if (!(readb(NOMADIK_UART_CR) & UART01x_CR_UARTEN))
return;
if (c == '\n')
putc('\r');
while (readb(NOMADIK_UART_FR) & UART01x_FR_TXFF)
barrier();
writeb(c, NOMADIK_UART_DR);
}
static void flush(void)
{
if (!(readb(NOMADIK_UART_CR) & UART01x_CR_UARTEN))
return;
while (readb(NOMADIK_UART_FR) & UART01x_FR_BUSY)
barrier();
}
static inline void arch_decomp_setup(void)
{
}
#define arch_decomp_wdog() /* nothing to do here */
#endif /* __ASM_ARCH_UNCOMPRESS_H */

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#define VMALLOC_END 0xe8000000

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/*
* linux/arch/arm/mach-nomadik/timer.c
*
* Copyright (C) 2008 STMicroelectronics
* Copyright (C) 2009 Alessandro Rubini, somewhat based on at91sam926x
*
* 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.
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/clockchips.h>
#include <linux/jiffies.h>
#include <asm/mach/time.h>
#include <mach/mtu.h>
#define TIMER_CTRL 0x80 /* No divisor */
#define TIMER_PERIODIC 0x40
#define TIMER_SZ32BIT 0x02
/* Initial value for SRC control register: all timers use MXTAL/8 source */
#define SRC_CR_INIT_MASK 0x00007fff
#define SRC_CR_INIT_VAL 0x2aaa8000
static u32 nmdk_count; /* accumulated count */
static u32 nmdk_cycle; /* write-once */
static __iomem void *mtu_base;
/*
* clocksource: the MTU device is a decrementing counters, so we negate
* the value being read.
*/
static cycle_t nmdk_read_timer(struct clocksource *cs)
{
u32 count = readl(mtu_base + MTU_VAL(0));
return nmdk_count + nmdk_cycle - count;
}
static struct clocksource nmdk_clksrc = {
.name = "mtu_0",
.rating = 120,
.read = nmdk_read_timer,
.shift = 20,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
/*
* Clockevent device: currently only periodic mode is supported
*/
static void nmdk_clkevt_mode(enum clock_event_mode mode,
struct clock_event_device *dev)
{
unsigned long flags;
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
/* enable interrupts -- and count current value? */
raw_local_irq_save(flags);
writel(readl(mtu_base + MTU_IMSC) | 1, mtu_base + MTU_IMSC);
raw_local_irq_restore(flags);
break;
case CLOCK_EVT_MODE_ONESHOT:
BUG(); /* Not supported, yet */
/* FALLTHROUGH */
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
/* disable irq */
raw_local_irq_save(flags);
writel(readl(mtu_base + MTU_IMSC) & ~1, mtu_base + MTU_IMSC);
raw_local_irq_restore(flags);
break;
case CLOCK_EVT_MODE_RESUME:
break;
}
}
static struct clock_event_device nmdk_clkevt = {
.name = "mtu_0",
.features = CLOCK_EVT_FEAT_PERIODIC,
.shift = 32,
.rating = 100,
.set_mode = nmdk_clkevt_mode,
};
/*
* IRQ Handler for the timer 0 of the MTU block. The irq is not shared
* as we are the only users of mtu0 by now.
*/
static irqreturn_t nmdk_timer_interrupt(int irq, void *dev_id)
{
/* ack: "interrupt clear register" */
writel( 1 << 0, mtu_base + MTU_ICR);
/* we can't count lost ticks, unfortunately */
nmdk_count += nmdk_cycle;
nmdk_clkevt.event_handler(&nmdk_clkevt);
return IRQ_HANDLED;
}
/*
* Set up timer interrupt, and return the current time in seconds.
*/
static struct irqaction nmdk_timer_irq = {
.name = "Nomadik Timer Tick",
.flags = IRQF_DISABLED | IRQF_TIMER,
.handler = nmdk_timer_interrupt,
};
static void nmdk_timer_reset(void)
{
u32 cr;
writel(0, mtu_base + MTU_CR(0)); /* off */
/* configure load and background-load, and fire it up */
writel(nmdk_cycle, mtu_base + MTU_LR(0));
writel(nmdk_cycle, mtu_base + MTU_BGLR(0));
cr = MTU_CRn_PERIODIC | MTU_CRn_PRESCALE_1 | MTU_CRn_32BITS;
writel(cr, mtu_base + MTU_CR(0));
writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(0));
}
static void __init nmdk_timer_init(void)
{
u32 src_cr;
unsigned long rate;
int bits;
rate = CLOCK_TICK_RATE; /* 2.4MHz */
nmdk_cycle = (rate + HZ/2) / HZ;
/* Configure timer sources in "system reset controller" ctrl reg */
src_cr = readl(io_p2v(NOMADIK_SRC_BASE));
src_cr &= SRC_CR_INIT_MASK;
src_cr |= SRC_CR_INIT_VAL;
writel(src_cr, io_p2v(NOMADIK_SRC_BASE));
/* Save global pointer to mtu, used by functions above */
mtu_base = io_p2v(NOMADIK_MTU0_BASE);
/* Init the timer and register clocksource */
nmdk_timer_reset();
nmdk_clksrc.mult = clocksource_hz2mult(rate, nmdk_clksrc.shift);
bits = 8*sizeof(nmdk_count);
nmdk_clksrc.mask = CLOCKSOURCE_MASK(bits);
clocksource_register(&nmdk_clksrc);
/* Register irq and clockevents */
setup_irq(IRQ_MTU0, &nmdk_timer_irq);
nmdk_clkevt.mult = div_sc(rate, NSEC_PER_SEC, nmdk_clkevt.shift);
nmdk_clkevt.cpumask = cpumask_of(0);
clockevents_register_device(&nmdk_clkevt);
}
struct sys_timer nomadik_timer = {
.init = nmdk_timer_init,
};