linux/arch/arm/mach-mmp/pxa910.c

/*
 *  linux/arch/arm/mach-mmp/pxa910.c
 *
 *  Code specific to PXA910
 *
 * 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 <asm/mach/time.h>
#include <mach/addr-map.h>
#include <mach/regs-apbc.h>
#include <mach/regs-apmu.h>
#include <mach/cputype.h>
#include <mach/irqs.h>
#include <mach/gpio.h>
#include <mach/dma.h>
#include <mach/mfp.h>
#include <mach/devices.h>

#include "common.h"
#include "clock.h"

#define MFPR_VIRT_BASE	(APB_VIRT_BASE + 0x1e000)

static struct mfp_addr_map pxa910_mfp_addr_map[] __initdata =
{
	MFP_ADDR_X(GPIO0, GPIO54, 0xdc),
	MFP_ADDR_X(GPIO67, GPIO98, 0x1b8),
	MFP_ADDR_X(GPIO100, GPIO109, 0x238),

	MFP_ADDR(GPIO123, 0xcc),
	MFP_ADDR(GPIO124, 0xd0),

	MFP_ADDR(DF_IO0, 0x40),
	MFP_ADDR(DF_IO1, 0x3c),
	MFP_ADDR(DF_IO2, 0x38),
	MFP_ADDR(DF_IO3, 0x34),
	MFP_ADDR(DF_IO4, 0x30),
	MFP_ADDR(DF_IO5, 0x2c),
	MFP_ADDR(DF_IO6, 0x28),
	MFP_ADDR(DF_IO7, 0x24),
	MFP_ADDR(DF_IO8, 0x20),
	MFP_ADDR(DF_IO9, 0x1c),
	MFP_ADDR(DF_IO10, 0x18),
	MFP_ADDR(DF_IO11, 0x14),
	MFP_ADDR(DF_IO12, 0x10),
	MFP_ADDR(DF_IO13, 0xc),
	MFP_ADDR(DF_IO14, 0x8),
	MFP_ADDR(DF_IO15, 0x4),

	MFP_ADDR(DF_nCS0_SM_nCS2, 0x44),
	MFP_ADDR(DF_nCS1_SM_nCS3, 0x48),
	MFP_ADDR(SM_nCS0, 0x4c),
	MFP_ADDR(SM_nCS1, 0x50),
	MFP_ADDR(DF_WEn, 0x54),
	MFP_ADDR(DF_REn, 0x58),
	MFP_ADDR(DF_CLE_SM_OEn, 0x5c),
	MFP_ADDR(DF_ALE_SM_WEn, 0x60),
	MFP_ADDR(SM_SCLK, 0x64),
	MFP_ADDR(DF_RDY0, 0x68),
	MFP_ADDR(SM_BE0, 0x6c),
	MFP_ADDR(SM_BE1, 0x70),
	MFP_ADDR(SM_ADV, 0x74),
	MFP_ADDR(DF_RDY1, 0x78),
	MFP_ADDR(SM_ADVMUX, 0x7c),
	MFP_ADDR(SM_RDY, 0x80),

	MFP_ADDR_X(MMC1_DAT7, MMC1_WP, 0x84),

	MFP_ADDR_END,
};

#define APMASK(i)	(GPIO_REGS_VIRT + BANK_OFF(i) + 0x09c)

static void __init pxa910_init_gpio(void)
{
	int i;

	/* enable GPIO clock */
	__raw_writel(APBC_APBCLK | APBC_FNCLK, APBC_PXA910_GPIO);

	/* unmask GPIO edge detection for all 4 banks - APMASKx */
	for (i = 0; i < 4; i++)
		__raw_writel(0xffffffff, APMASK(i));

	pxa_init_gpio(IRQ_PXA910_AP_GPIO, 0, 127, NULL);
}

void __init pxa910_init_irq(void)
{
	icu_init_irq();
	pxa910_init_gpio();
}

/* APB peripheral clocks */
static APBC_CLK(uart1, PXA910_UART0, 1, 14745600);
static APBC_CLK(uart2, PXA910_UART1, 1, 14745600);
static APBC_CLK(twsi0, PXA168_TWSI0, 1, 33000000);
static APBC_CLK(twsi1, PXA168_TWSI1, 1, 33000000);

/* device and clock bindings */
static struct clk_lookup pxa910_clkregs[] = {
	INIT_CLKREG(&clk_uart1, "pxa2xx-uart.0", NULL),
	INIT_CLKREG(&clk_uart2, "pxa2xx-uart.1", NULL),
	INIT_CLKREG(&clk_twsi0, "pxa2xx-i2c.0", NULL),
	INIT_CLKREG(&clk_twsi1, "pxa2xx-i2c.1", NULL),
};

static int __init pxa910_init(void)
{
	if (cpu_is_pxa910()) {
		mfp_init_base(MFPR_VIRT_BASE);
		mfp_init_addr(pxa910_mfp_addr_map);
		pxa_init_dma(IRQ_PXA910_DMA_INT0, 32);
		clks_register(ARRAY_AND_SIZE(pxa910_clkregs));
	}

	return 0;
}
postcore_initcall(pxa910_init);

/* system timer - clock enabled, 3.25MHz */
#define TIMER_CLK_RST	(APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(3))

static void __init pxa910_timer_init(void)
{
	/* reset and configure */
	__raw_writel(APBC_APBCLK | APBC_RST, APBC_PXA910_TIMERS);
	__raw_writel(TIMER_CLK_RST, APBC_PXA910_TIMERS);

	timer_init(IRQ_PXA910_AP1_TIMER1);
}

struct sys_timer pxa910_timer = {
	.init	= pxa910_timer_init,
};

/* on-chip devices */

/* NOTE: there are totally 3 UARTs on PXA910:
 *
 *   UART1   - Slow UART (can be used both by AP and CP)
 *   UART2/3 - Fast UART
 *
 * To be backward compatible with the legacy FFUART/BTUART/STUART sequence,
 * they are re-ordered as:
 *
 *   pxa910_device_uart1 - UART2 as FFUART
 *   pxa910_device_uart2 - UART3 as BTUART
 *
 * UART1 is not used by AP for the moment.
 */
PXA910_DEVICE(uart1, "pxa2xx-uart", 0, UART2, 0xd4017000, 0x30, 21, 22);
PXA910_DEVICE(uart2, "pxa2xx-uart", 1, UART3, 0xd4018000, 0x30, 23, 24);
PXA910_DEVICE(twsi0, "pxa2xx-i2c", 0, TWSI0, 0xd4011000, 0x28);
PXA910_DEVICE(twsi1, "pxa2xx-i2c", 1, TWSI1, 0xd4025000, 0x28);