katana.c

来自「h内核」· C语言 代码 · 共 685 行 · 第 1/2 页

/*
 * arch/ppc/platforms/katana.c
 *
 * Board setup routines for the Artesyn Katana 750 based boards.
 *
 * Tim Montgomery <[e-mail]>
 *
 * Based on code done by Rabeeh Khoury - [e-mail]
 * Based on code done by - Mark A. Greer <[e-mail]>
 *
 * 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.
 */
/*
 * Supports the Artesyn 750i, 752i, and 3750.  The 752i is virtually identical
 * to the 750i except that it has an mv64460 bridge.
 */
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/console.h>
#include <linux/initrd.h>
#include <linux/root_dev.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/smp.h>
#include <linux/mv643xx.h>
#ifdef CONFIG_BOOTIMG
#include <linux/bootimg.h>
#endif
#include <asm/page.h>
#include <asm/time.h>
#include <asm/smp.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/mv64x60.h>
#include <platforms/katana.h>

static struct		mv64x60_handle bh;
static katana_id_t	katana_id;
static u32		cpld_base;
static u32		sram_base;

/* PCI Interrupt routing */
static int __init
katana_irq_lookup_750i(unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] = {
		/*
		 * PCI IDSEL/INTPIN->INTLINE
		 *       A   B   C   D
		 */
		/* IDSEL 4  (PMC 1) */
		{ KATANA_PCI_INTB_IRQ_750i, KATANA_PCI_INTC_IRQ_750i,
			KATANA_PCI_INTD_IRQ_750i, KATANA_PCI_INTA_IRQ_750i },
		/* IDSEL 5  (PMC 2) */
		{ KATANA_PCI_INTC_IRQ_750i, KATANA_PCI_INTD_IRQ_750i,
			KATANA_PCI_INTA_IRQ_750i, KATANA_PCI_INTB_IRQ_750i },
		/* IDSEL 6 (T8110) */
		{KATANA_PCI_INTD_IRQ_750i, 0, 0, 0 },
	};
	const long min_idsel = 4, max_idsel = 6, irqs_per_slot = 4;

	return PCI_IRQ_TABLE_LOOKUP;
}

static int __init
katana_irq_lookup_3750(unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] = {
		/*
		 * PCI IDSEL/INTPIN->INTLINE
		 *       A   B   C   D
		 */
		{ KATANA_PCI_INTA_IRQ_3750, 0, 0, 0 }, /* IDSEL 3 (BCM5691) */
		{ KATANA_PCI_INTB_IRQ_3750, 0, 0, 0 }, /* IDSEL 4 (MV64360 #2)*/
		{ KATANA_PCI_INTC_IRQ_3750, 0, 0, 0 }, /* IDSEL 5 (MV64360 #3)*/
	};
	const long min_idsel = 3, max_idsel = 5, irqs_per_slot = 4;

	return PCI_IRQ_TABLE_LOOKUP;
}

static int __init
katana_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	switch (katana_id) {
	case KATANA_ID_750I:
	case KATANA_ID_752I:
		return katana_irq_lookup_750i(idsel, pin);

	case KATANA_ID_3750:
		return katana_irq_lookup_3750(idsel, pin);

	default:
		printk(KERN_ERR "Bogus board ID\n");
		return 0;
	}
}

/* Board info retrieval routines */
void __init
katana_get_board_id(void)
{
	switch (in_8((volatile char *)(cpld_base + KATANA_CPLD_PRODUCT_ID))) {
	case KATANA_PRODUCT_ID_3750:
		katana_id = KATANA_ID_3750;
		break;

	case KATANA_PRODUCT_ID_750i:
		katana_id = KATANA_ID_750I;
		break;

	case KATANA_PRODUCT_ID_752i:
		katana_id = KATANA_ID_752I;
		break;

	default:
		printk(KERN_ERR "Unsupported board\n");
	}
}

int __init
katana_get_proc_num(void)
{
	u16		val;
	u8		save_exclude;
	static int	proc = -1;
	static u8	first_time = 1;

	if (first_time) {
		if (katana_id != KATANA_ID_3750)
			proc = 0;
		else {
			save_exclude = mv64x60_pci_exclude_bridge;
			mv64x60_pci_exclude_bridge = 0;

			early_read_config_word(bh.hose_a, 0,
				PCI_DEVFN(0,0), PCI_DEVICE_ID, &val);

			mv64x60_pci_exclude_bridge = save_exclude;

			switch(val) {
			case PCI_DEVICE_ID_KATANA_3750_PROC0:
				proc = 0;
				break;

			case PCI_DEVICE_ID_KATANA_3750_PROC1:
				proc = 1;
				break;

			case PCI_DEVICE_ID_KATANA_3750_PROC2:
				proc = 2;
				break;

			default:
				printk(KERN_ERR "Bogus Device ID\n");
			}
		}

		first_time = 0;
	}

	return proc;
}

static inline int
katana_is_monarch(void)
{
	return in_8((volatile char *)(cpld_base + KATANA_CPLD_BD_CFG_3)) &
		KATANA_CPLD_BD_CFG_3_MONARCH;
}

static void __init
katana_enable_ipmi(void)
{
	u8 reset_out;

	/* Enable access to IPMI ctlr by clearing IPMI PORTSEL bit in CPLD */
	reset_out = in_8((volatile char *)(cpld_base + KATANA_CPLD_RESET_OUT));
	reset_out &= ~KATANA_CPLD_RESET_OUT_PORTSEL;
	out_8((volatile void *)(cpld_base + KATANA_CPLD_RESET_OUT), reset_out);
	return;
}

static unsigned long
katana_bus_freq(void)
{
	u8 bd_cfg_0;

	bd_cfg_0 = in_8((volatile char *)(cpld_base + KATANA_CPLD_BD_CFG_0));

	switch (bd_cfg_0 & KATANA_CPLD_BD_CFG_0_SYSCLK_MASK) {
	case KATANA_CPLD_BD_CFG_0_SYSCLK_200:
		return 200000000;
		break;

	case KATANA_CPLD_BD_CFG_0_SYSCLK_166:
		return 166666666;
		break;

	case KATANA_CPLD_BD_CFG_0_SYSCLK_133:
		return 133333333;
		break;

	case KATANA_CPLD_BD_CFG_0_SYSCLK_100:
		return 100000000;
		break;

	default:
		return 133333333;
		break;
	}
}

/* Bridge & platform setup routines */
void __init
katana_intr_setup(void)
{
	/* MPP 8, 9, and 10 */
	mv64x60_clr_bits(&bh, MV64x60_MPP_CNTL_1, 0xfff);

	/* MPP 14 */
	if ((katana_id == KATANA_ID_750I) || (katana_id == KATANA_ID_752I))
		mv64x60_clr_bits(&bh, MV64x60_MPP_CNTL_1, 0x0f000000);

	/*
	 * Define GPP 8,9,and 10 interrupt polarity as active low
	 * input signal and level triggered
	 */
	mv64x60_set_bits(&bh, MV64x60_GPP_LEVEL_CNTL, 0x700);
	mv64x60_clr_bits(&bh, MV64x60_GPP_IO_CNTL, 0x700);

	if ((katana_id == KATANA_ID_750I) || (katana_id == KATANA_ID_752I)) {
		mv64x60_set_bits(&bh, MV64x60_GPP_LEVEL_CNTL, (1<<14));
		mv64x60_clr_bits(&bh, MV64x60_GPP_IO_CNTL, (1<<14));
	}

	/* Config GPP intr ctlr to respond to level trigger */
	mv64x60_set_bits(&bh, MV64x60_COMM_ARBITER_CNTL, (1<<10));

	/* Erranum FEr PCI-#8 */
	mv64x60_clr_bits(&bh, MV64x60_PCI0_CMD, (1<<5) | (1<<9));
	mv64x60_clr_bits(&bh, MV64x60_PCI1_CMD, (1<<5) | (1<<9));

	/*
	 * Dismiss and then enable interrupt on GPP interrupt cause
	 * for CPU #0
	 */
	mv64x60_write(&bh, MV64x60_GPP_INTR_CAUSE, ~0x700);
	mv64x60_set_bits(&bh, MV64x60_GPP_INTR_MASK, 0x700);

	if ((katana_id == KATANA_ID_750I) || (katana_id == KATANA_ID_752I)) {
		mv64x60_write(&bh, MV64x60_GPP_INTR_CAUSE, ~(1<<14));
		mv64x60_set_bits(&bh, MV64x60_GPP_INTR_MASK, (1<<14));
	}

	/*
	 * Dismiss and then enable interrupt on CPU #0 high cause reg
	 * BIT25 summarizes GPP interrupts 8-15
	 */
	mv64x60_set_bits(&bh, MV64360_IC_CPU0_INTR_MASK_HI, (1<<25));
	return;
}

void __init
katana_setup_peripherals(void)
{
	u32 base, size_0, size_1;

	/* Set up windows for boot CS, soldered & socketed flash, and CPLD */
	mv64x60_set_32bit_window(&bh, MV64x60_CPU2BOOT_WIN,
		 KATANA_BOOT_WINDOW_BASE, KATANA_BOOT_WINDOW_SIZE, 0);
	bh.ci->enable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);

	/* Assume firmware set up window sizes correctly for dev 0 & 1 */
	mv64x60_get_32bit_window(&bh, MV64x60_CPU2DEV_0_WIN, &base, &size_0);

	if (size_0 > 0) {
		mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_0_WIN,
			 KATANA_SOLDERED_FLASH_BASE, size_0, 0);
		bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_0_WIN);
	}

	mv64x60_get_32bit_window(&bh, MV64x60_CPU2DEV_1_WIN, &base, &size_1);

	if (size_1 > 0) {
		mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_1_WIN,
			 (KATANA_SOLDERED_FLASH_BASE + size_0), size_1, 0);
		bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_1_WIN);
	}

	mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_2_WIN,
		 KATANA_SOCKET_BASE, KATANA_SOCKETED_FLASH_SIZE, 0);
	bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_2_WIN);

	mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_3_WIN,
		 KATANA_CPLD_BASE, KATANA_CPLD_SIZE, 0);
	bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_3_WIN);
	cpld_base = (u32)ioremap(KATANA_CPLD_BASE, KATANA_CPLD_SIZE);

	mv64x60_set_32bit_window(&bh, MV64x60_CPU2SRAM_WIN,
		 KATANA_INTERNAL_SRAM_BASE, MV64360_SRAM_SIZE, 0);
	bh.ci->enable_window_32bit(&bh, MV64x60_CPU2SRAM_WIN);
	sram_base = (u32)ioremap(KATANA_INTERNAL_SRAM_BASE, MV64360_SRAM_SIZE);

	/* Set up Enet->SRAM window */
	mv64x60_set_32bit_window(&bh, MV64x60_ENET2MEM_4_WIN,
		KATANA_INTERNAL_SRAM_BASE, MV64360_SRAM_SIZE, 0x2);
	bh.ci->enable_window_32bit(&bh, MV64x60_ENET2MEM_4_WIN);

	/* Give enet r/w access to memory region */
	mv64x60_set_bits(&bh, MV64360_ENET2MEM_ACC_PROT_0, (0x3 << (4 << 1)));
	mv64x60_set_bits(&bh, MV64360_ENET2MEM_ACC_PROT_1, (0x3 << (4 << 1)));
	mv64x60_set_bits(&bh, MV64360_ENET2MEM_ACC_PROT_2, (0x3 << (4 << 1)));

	mv64x60_clr_bits(&bh, MV64x60_PCI1_PCI_DECODE_CNTL, (1 << 3));
	mv64x60_clr_bits(&bh, MV64x60_TIMR_CNTR_0_3_CNTL,
			 ((1 << 0) | (1 << 8) | (1 << 16) | (1 << 24)));

	/* Must wait until window set up before retrieving board id */
	katana_get_board_id();

	/* Enumerate pci bus (must know board id before getting proc number) */
	if (katana_get_proc_num() == 0)
		bh.hose_b->last_busno = pciauto_bus_scan(bh.hose_b, 0);

#if defined(CONFIG_NOT_COHERENT_CACHE)
	mv64x60_write(&bh, MV64360_SRAM_CONFIG, 0x00160000);
#else
	mv64x60_write(&bh, MV64360_SRAM_CONFIG, 0x001600b2);
#endif

	/*
	 * Setting the SRAM to 0. Note that this generates parity errors on
	 * internal data path in SRAM since it's first time accessing it
	 * while after reset it's not configured.
	 */
	memset((void *)sram_base, 0, MV64360_SRAM_SIZE);