linux/arch/arm/mach-mmp/pxa168.c
Linus Torvalds 0195c00244 Disintegrate and delete asm/system.h
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Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system

Pull "Disintegrate and delete asm/system.h" from David Howells:
 "Here are a bunch of patches to disintegrate asm/system.h into a set of
  separate bits to relieve the problem of circular inclusion
  dependencies.

  I've built all the working defconfigs from all the arches that I can
  and made sure that they don't break.

  The reason for these patches is that I recently encountered a circular
  dependency problem that came about when I produced some patches to
  optimise get_order() by rewriting it to use ilog2().

  This uses bitops - and on the SH arch asm/bitops.h drags in
  asm-generic/get_order.h by a circuituous route involving asm/system.h.

  The main difficulty seems to be asm/system.h.  It holds a number of
  low level bits with no/few dependencies that are commonly used (eg.
  memory barriers) and a number of bits with more dependencies that
  aren't used in many places (eg.  switch_to()).

  These patches break asm/system.h up into the following core pieces:

    (1) asm/barrier.h

        Move memory barriers here.  This already done for MIPS and Alpha.

    (2) asm/switch_to.h

        Move switch_to() and related stuff here.

    (3) asm/exec.h

        Move arch_align_stack() here.  Other process execution related bits
        could perhaps go here from asm/processor.h.

    (4) asm/cmpxchg.h

        Move xchg() and cmpxchg() here as they're full word atomic ops and
        frequently used by atomic_xchg() and atomic_cmpxchg().

    (5) asm/bug.h

        Move die() and related bits.

    (6) asm/auxvec.h

        Move AT_VECTOR_SIZE_ARCH here.

  Other arch headers are created as needed on a per-arch basis."

Fixed up some conflicts from other header file cleanups and moving code
around that has happened in the meantime, so David's testing is somewhat
weakened by that.  We'll find out anything that got broken and fix it..

* tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)
  Delete all instances of asm/system.h
  Remove all #inclusions of asm/system.h
  Add #includes needed to permit the removal of asm/system.h
  Move all declarations of free_initmem() to linux/mm.h
  Disintegrate asm/system.h for OpenRISC
  Split arch_align_stack() out from asm-generic/system.h
  Split the switch_to() wrapper out of asm-generic/system.h
  Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
  Create asm-generic/barrier.h
  Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
  Disintegrate asm/system.h for Xtensa
  Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]
  Disintegrate asm/system.h for Tile
  Disintegrate asm/system.h for Sparc
  Disintegrate asm/system.h for SH
  Disintegrate asm/system.h for Score
  Disintegrate asm/system.h for S390
  Disintegrate asm/system.h for PowerPC
  Disintegrate asm/system.h for PA-RISC
  Disintegrate asm/system.h for MN10300
  ...
2012-03-28 15:58:21 -07:00

229 lines
6.9 KiB
C

/*
* linux/arch/arm/mach-mmp/pxa168.c
*
* Code specific to PXA168
*
* 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/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <asm/mach/time.h>
#include <asm/system_misc.h>
#include <mach/addr-map.h>
#include <mach/cputype.h>
#include <mach/regs-apbc.h>
#include <mach/regs-apmu.h>
#include <mach/irqs.h>
#include <mach/dma.h>
#include <mach/devices.h>
#include <mach/mfp.h>
#include <linux/dma-mapping.h>
#include <mach/pxa168.h>
#include "common.h"
#include "clock.h"
#define MFPR_VIRT_BASE (APB_VIRT_BASE + 0x1e000)
static struct mfp_addr_map pxa168_mfp_addr_map[] __initdata =
{
MFP_ADDR_X(GPIO0, GPIO36, 0x04c),
MFP_ADDR_X(GPIO37, GPIO55, 0x000),
MFP_ADDR_X(GPIO56, GPIO123, 0x0e0),
MFP_ADDR_X(GPIO124, GPIO127, 0x0f4),
MFP_ADDR_END,
};
void __init pxa168_init_irq(void)
{
icu_init_irq();
}
/* APB peripheral clocks */
static APBC_CLK(uart1, PXA168_UART1, 1, 14745600);
static APBC_CLK(uart2, PXA168_UART2, 1, 14745600);
static APBC_CLK(uart3, PXA168_UART3, 1, 14745600);
static APBC_CLK(twsi0, PXA168_TWSI0, 1, 33000000);
static APBC_CLK(twsi1, PXA168_TWSI1, 1, 33000000);
static APBC_CLK(pwm1, PXA168_PWM1, 1, 13000000);
static APBC_CLK(pwm2, PXA168_PWM2, 1, 13000000);
static APBC_CLK(pwm3, PXA168_PWM3, 1, 13000000);
static APBC_CLK(pwm4, PXA168_PWM4, 1, 13000000);
static APBC_CLK(ssp1, PXA168_SSP1, 4, 0);
static APBC_CLK(ssp2, PXA168_SSP2, 4, 0);
static APBC_CLK(ssp3, PXA168_SSP3, 4, 0);
static APBC_CLK(ssp4, PXA168_SSP4, 4, 0);
static APBC_CLK(ssp5, PXA168_SSP5, 4, 0);
static APBC_CLK(gpio, PXA168_GPIO, 0, 13000000);
static APBC_CLK(keypad, PXA168_KPC, 0, 32000);
static APBC_CLK(rtc, PXA168_RTC, 8, 32768);
static APMU_CLK(nand, NAND, 0x19b, 156000000);
static APMU_CLK(lcd, LCD, 0x7f, 312000000);
static APMU_CLK(eth, ETH, 0x09, 0);
static APMU_CLK(usb, USB, 0x12, 0);
/* device and clock bindings */
static struct clk_lookup pxa168_clkregs[] = {
INIT_CLKREG(&clk_uart1, "pxa2xx-uart.0", NULL),
INIT_CLKREG(&clk_uart2, "pxa2xx-uart.1", NULL),
INIT_CLKREG(&clk_uart3, "pxa2xx-uart.2", NULL),
INIT_CLKREG(&clk_twsi0, "pxa2xx-i2c.0", NULL),
INIT_CLKREG(&clk_twsi1, "pxa2xx-i2c.1", NULL),
INIT_CLKREG(&clk_pwm1, "pxa168-pwm.0", NULL),
INIT_CLKREG(&clk_pwm2, "pxa168-pwm.1", NULL),
INIT_CLKREG(&clk_pwm3, "pxa168-pwm.2", NULL),
INIT_CLKREG(&clk_pwm4, "pxa168-pwm.3", NULL),
INIT_CLKREG(&clk_ssp1, "pxa168-ssp.0", NULL),
INIT_CLKREG(&clk_ssp2, "pxa168-ssp.1", NULL),
INIT_CLKREG(&clk_ssp3, "pxa168-ssp.2", NULL),
INIT_CLKREG(&clk_ssp4, "pxa168-ssp.3", NULL),
INIT_CLKREG(&clk_ssp5, "pxa168-ssp.4", NULL),
INIT_CLKREG(&clk_nand, "pxa3xx-nand", NULL),
INIT_CLKREG(&clk_lcd, "pxa168-fb", NULL),
INIT_CLKREG(&clk_gpio, "pxa-gpio", NULL),
INIT_CLKREG(&clk_keypad, "pxa27x-keypad", NULL),
INIT_CLKREG(&clk_eth, "pxa168-eth", "MFUCLK"),
INIT_CLKREG(&clk_usb, "pxa168-ehci", "PXA168-USBCLK"),
INIT_CLKREG(&clk_rtc, "sa1100-rtc", NULL),
};
static int __init pxa168_init(void)
{
if (cpu_is_pxa168()) {
mfp_init_base(MFPR_VIRT_BASE);
mfp_init_addr(pxa168_mfp_addr_map);
pxa_init_dma(IRQ_PXA168_DMA_INT0, 32);
clkdev_add_table(ARRAY_AND_SIZE(pxa168_clkregs));
}
return 0;
}
postcore_initcall(pxa168_init);
/* system timer - clock enabled, 3.25MHz */
#define TIMER_CLK_RST (APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(3))
static void __init pxa168_timer_init(void)
{
/* this is early, we have to initialize the CCU registers by
* ourselves instead of using clk_* API. Clock rate is defined
* by APBC_TIMERS_CLK_RST (3.25MHz) and enabled free-running
*/
__raw_writel(APBC_APBCLK | APBC_RST, APBC_PXA168_TIMERS);
/* 3.25MHz, bus/functional clock enabled, release reset */
__raw_writel(TIMER_CLK_RST, APBC_PXA168_TIMERS);
timer_init(IRQ_PXA168_TIMER1);
}
struct sys_timer pxa168_timer = {
.init = pxa168_timer_init,
};
void pxa168_clear_keypad_wakeup(void)
{
uint32_t val;
uint32_t mask = APMU_PXA168_KP_WAKE_CLR;
/* wake event clear is needed in order to clear keypad interrupt */
val = __raw_readl(APMU_WAKE_CLR);
__raw_writel(val | mask, APMU_WAKE_CLR);
}
/* on-chip devices */
PXA168_DEVICE(uart1, "pxa2xx-uart", 0, UART1, 0xd4017000, 0x30, 21, 22);
PXA168_DEVICE(uart2, "pxa2xx-uart", 1, UART2, 0xd4018000, 0x30, 23, 24);
PXA168_DEVICE(uart3, "pxa2xx-uart", 2, UART3, 0xd4026000, 0x30, 23, 24);
PXA168_DEVICE(twsi0, "pxa2xx-i2c", 0, TWSI0, 0xd4011000, 0x28);
PXA168_DEVICE(twsi1, "pxa2xx-i2c", 1, TWSI1, 0xd4025000, 0x28);
PXA168_DEVICE(pwm1, "pxa168-pwm", 0, NONE, 0xd401a000, 0x10);
PXA168_DEVICE(pwm2, "pxa168-pwm", 1, NONE, 0xd401a400, 0x10);
PXA168_DEVICE(pwm3, "pxa168-pwm", 2, NONE, 0xd401a800, 0x10);
PXA168_DEVICE(pwm4, "pxa168-pwm", 3, NONE, 0xd401ac00, 0x10);
PXA168_DEVICE(nand, "pxa3xx-nand", -1, NAND, 0xd4283000, 0x80, 97, 99);
PXA168_DEVICE(ssp1, "pxa168-ssp", 0, SSP1, 0xd401b000, 0x40, 52, 53);
PXA168_DEVICE(ssp2, "pxa168-ssp", 1, SSP2, 0xd401c000, 0x40, 54, 55);
PXA168_DEVICE(ssp3, "pxa168-ssp", 2, SSP3, 0xd401f000, 0x40, 56, 57);
PXA168_DEVICE(ssp4, "pxa168-ssp", 3, SSP4, 0xd4020000, 0x40, 58, 59);
PXA168_DEVICE(ssp5, "pxa168-ssp", 4, SSP5, 0xd4021000, 0x40, 60, 61);
PXA168_DEVICE(fb, "pxa168-fb", -1, LCD, 0xd420b000, 0x1c8);
PXA168_DEVICE(keypad, "pxa27x-keypad", -1, KEYPAD, 0xd4012000, 0x4c);
PXA168_DEVICE(eth, "pxa168-eth", -1, MFU, 0xc0800000, 0x0fff);
struct resource pxa168_resource_gpio[] = {
{
.start = 0xd4019000,
.end = 0xd4019fff,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_PXA168_GPIOX,
.end = IRQ_PXA168_GPIOX,
.name = "gpio_mux",
.flags = IORESOURCE_IRQ,
},
};
struct platform_device pxa168_device_gpio = {
.name = "pxa-gpio",
.id = -1,
.num_resources = ARRAY_SIZE(pxa168_resource_gpio),
.resource = pxa168_resource_gpio,
};
struct resource pxa168_usb_host_resources[] = {
/* USB Host conroller register base */
[0] = {
.start = 0xd4209000,
.end = 0xd4209000 + 0x200,
.flags = IORESOURCE_MEM,
.name = "pxa168-usb-host",
},
/* USB PHY register base */
[1] = {
.start = 0xd4206000,
.end = 0xd4206000 + 0xff,
.flags = IORESOURCE_MEM,
.name = "pxa168-usb-phy",
},
[2] = {
.start = IRQ_PXA168_USB2,
.end = IRQ_PXA168_USB2,
.flags = IORESOURCE_IRQ,
},
};
static u64 pxa168_usb_host_dmamask = DMA_BIT_MASK(32);
struct platform_device pxa168_device_usb_host = {
.name = "pxa168-ehci",
.id = -1,
.dev = {
.dma_mask = &pxa168_usb_host_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
.num_resources = ARRAY_SIZE(pxa168_usb_host_resources),
.resource = pxa168_usb_host_resources,
};
int __init pxa168_add_usb_host(struct pxa168_usb_pdata *pdata)
{
pxa168_device_usb_host.dev.platform_data = pdata;
return platform_device_register(&pxa168_device_usb_host);
}
void pxa168_restart(char mode, const char *cmd)
{
soft_restart(0xffff0000);
}