linux-vybrid_public/arch/powerpc/platforms/86xx/pci.c

/*
 * MPC86XX pci setup code
 *
 * Recode: ZHANG WEI <wei.zhang@freescale.com>
 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
 *
 * Copyright 2006 Freescale Semiconductor Inc.
 *
 * 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.
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/serial.h>

#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/immap_86xx.h>
#include <asm/pci-bridge.h>
#include <sysdev/fsl_soc.h>

#include "mpc86xx.h"

#undef DEBUG

#ifdef DEBUG
#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
#else
#define DBG(fmt, args...)
#endif

struct pcie_outbound_window_regs {
	uint    pexotar;               /* 0x.0 - PCI Express outbound translation address register */
	uint    pexotear;              /* 0x.4 - PCI Express outbound translation extended address register */
	uint    pexowbar;              /* 0x.8 - PCI Express outbound window base address register */
	char    res1[4];
	uint    pexowar;               /* 0x.10 - PCI Express outbound window attributes register */
	char    res2[12];
};

struct pcie_inbound_window_regs {
	uint    pexitar;               /* 0x.0 - PCI Express inbound translation address register */
	char    res1[4];
	uint    pexiwbar;              /* 0x.8 - PCI Express inbound window base address register */
	uint    pexiwbear;             /* 0x.c - PCI Express inbound window base extended address register */
	uint    pexiwar;               /* 0x.10 - PCI Express inbound window attributes register */
	char    res2[12];
};

static void __init setup_pcie_atmu(struct pci_controller *hose, struct resource *rsrc)
{
	volatile struct ccsr_pex *pcie;
	volatile struct pcie_outbound_window_regs *pcieow;
	volatile struct pcie_inbound_window_regs *pcieiw;
	int i = 0;

	DBG("PCIE memory map start 0x%x, size 0x%x\n", rsrc->start,
			rsrc->end - rsrc->start + 1);
	pcie = ioremap(rsrc->start, rsrc->end - rsrc->start + 1);

	/* Disable all windows (except pexowar0 since its ignored) */
	pcie->pexowar1 = 0;
	pcie->pexowar2 = 0;
 	pcie->pexowar3 = 0;
 	pcie->pexowar4 = 0;
 	pcie->pexiwar1 = 0;
 	pcie->pexiwar2 = 0;
 	pcie->pexiwar3 = 0;

 	pcieow = (struct pcie_outbound_window_regs *)&pcie->pexotar1;
 	pcieiw = (struct pcie_inbound_window_regs *)&pcie->pexitar1;

 	/* Setup outbound MEM window */
 	for(i = 0; i < 3; i++)
 		if (hose->mem_resources[i].flags & IORESOURCE_MEM){
 			DBG("PCIE MEM resource start 0x%08x, size 0x%08x.\n",
 				hose->mem_resources[i].start,
 				hose->mem_resources[i].end
 				  - hose->mem_resources[i].start + 1);
 			pcieow->pexotar = (hose->mem_resources[i].start) >> 12
 				& 0x000fffff;
 			pcieow->pexotear = 0;
 			pcieow->pexowbar = (hose->mem_resources[i].start) >> 12
 				& 0x000fffff;
 			/* Enable, Mem R/W */
 			pcieow->pexowar = 0x80044000 |
 				(__ilog2(hose->mem_resources[i].end
 					 - hose->mem_resources[i].start + 1)
 				 - 1);
 			pcieow++;
 		}

 	/* Setup outbound IO window */
 	if (hose->io_resource.flags & IORESOURCE_IO){
 		DBG("PCIE IO resource start 0x%08x, size 0x%08x, phy base 0x%08x.\n",
 			hose->io_resource.start,
 			hose->io_resource.end - hose->io_resource.start + 1,
 			hose->io_base_phys);
 		pcieow->pexotar = (hose->io_resource.start) >> 12 & 0x000fffff;
 		pcieow->pexotear = 0;
 		pcieow->pexowbar = (hose->io_base_phys) >> 12 & 0x000fffff;
 		/* Enable, IO R/W */
 		pcieow->pexowar = 0x80088000 | (__ilog2(hose->io_resource.end
 					- hose->io_resource.start + 1) - 1);
 	}

 	/* Setup 2G inbound Memory Window @ 0 */
 	pcieiw->pexitar = 0x00000000;
 	pcieiw->pexiwbar = 0x00000000;
 	/* Enable, Prefetch, Local Mem, Snoop R/W, 2G */
 	pcieiw->pexiwar = 0xa0f5501e;
}

static void __init
mpc86xx_setup_pcie(struct pci_controller *hose, u32 pcie_offset, u32 pcie_size)
{
	volatile struct ccsr_pex *pcie;
	u16 cmd;
	unsigned int temps;

	DBG("PCIE host controller register offset 0x%08x, size 0x%08x.\n",
			pcie_offset, pcie_size);

	pcie = ioremap(pcie_offset, pcie_size);

	early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
	cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
	    | PCI_COMMAND_IO;
	early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);

	early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);

	/* PCIE Bus, Fix the MPC8641D host bridge's location to bus 0xFF. */
	early_read_config_dword(hose, 0, 0, PCI_PRIMARY_BUS, &temps);
	temps = (temps & 0xff000000) | (0xff) | (0x0 << 8) | (0xfe << 16);
	early_write_config_dword(hose, 0, 0, PCI_PRIMARY_BUS, temps);
}

int __init add_bridge(struct device_node *dev)
{
	int len;
	struct pci_controller *hose;
	struct resource rsrc;
	int *bus_range;
	int has_address = 0;
	int primary = 0;

	DBG("Adding PCIE host bridge %s\n", dev->full_name);

	/* Fetch host bridge registers address */
	has_address = (of_address_to_resource(dev, 0, &rsrc) == 0);

	/* Get bus range if any */
	bus_range = (int *) get_property(dev, "bus-range", &len);
	if (bus_range == NULL || len < 2 * sizeof(int))
		printk(KERN_WARNING "Can't get bus-range for %s, assume"
		       " bus 0\n", dev->full_name);

	hose = pcibios_alloc_controller();
	if (!hose)
		return -ENOMEM;
	hose->arch_data = dev;
	hose->set_cfg_type = 1;

	/* last_busno = 0xfe cause by MPC8641 PCIE bug */
	hose->first_busno = bus_range ? bus_range[0] : 0x0;
	hose->last_busno = bus_range ? bus_range[1] : 0xfe;

	setup_indirect_pcie(hose, rsrc.start, rsrc.start + 0x4);

	/* Setup the PCIE host controller. */
	mpc86xx_setup_pcie(hose, rsrc.start, rsrc.end - rsrc.start + 1);

	if ((rsrc.start & 0xfffff) == 0x8000)
		primary = 1;

	printk(KERN_INFO "Found MPC86xx PCIE host bridge at 0x%08lx. "
	       "Firmware bus number: %d->%d\n",
		rsrc.start, hose->first_busno, hose->last_busno);

	DBG(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
		hose, hose->cfg_addr, hose->cfg_data);

	/* Interpret the "ranges" property */
	/* This also maps the I/O region and sets isa_io/mem_base */
	pci_process_bridge_OF_ranges(hose, dev, primary);

	/* Setup PEX window registers */
	setup_pcie_atmu(hose, &rsrc);

	return 0;
}

static void __devinit quirk_ali1575(struct pci_dev *dev)
{
	unsigned short temp;

	/*
	 * ALI1575 interrupts route table setup:
	 *
	 * IRQ pin   IRQ#
	 * PIRQA ---- 3
	 * PIRQB ---- 4
	 * PIRQC ---- 5
	 * PIRQD ---- 6
	 * PIRQE ---- 9
	 * PIRQF ---- 10
	 * PIRQG ---- 11
	 * PIRQH ---- 12
	 *
	 * interrupts for PCI slot0 -- PIRQA / PIRQB / PIRQC / PIRQD
	 *                PCI slot1 -- PIRQB / PIRQC / PIRQD / PIRQA
	 */
	pci_write_config_dword(dev, 0x48, 0xb9317542);

	/* USB 1.1 OHCI controller 1, interrupt: PIRQE */
	pci_write_config_byte(dev, 0x86, 0x0c);

	/* USB 1.1 OHCI controller 2, interrupt: PIRQF */
	pci_write_config_byte(dev, 0x87, 0x0d);

	/* USB 1.1 OHCI controller 3, interrupt: PIRQH */
	pci_write_config_byte(dev, 0x88, 0x0f);

	/* USB 2.0 controller, interrupt: PIRQ7 */
	pci_write_config_byte(dev, 0x74, 0x06);

	/* Audio controller, interrupt: PIRQE */
	pci_write_config_byte(dev, 0x8a, 0x0c);

	/* Modem controller, interrupt: PIRQF */
	pci_write_config_byte(dev, 0x8b, 0x0d);

	/* HD audio controller, interrupt: PIRQG */
	pci_write_config_byte(dev, 0x8c, 0x0e);

	/* Serial ATA interrupt: PIRQD */
	pci_write_config_byte(dev, 0x8d, 0x0b);

	/* SMB interrupt: PIRQH */
	pci_write_config_byte(dev, 0x8e, 0x0f);

	/* PMU ACPI SCI interrupt: PIRQH */
	pci_write_config_byte(dev, 0x8f, 0x0f);

	/* Primary PATA IDE IRQ: 14
	 * Secondary PATA IDE IRQ: 15
	 */
	pci_write_config_byte(dev, 0x44, 0x3d);
	pci_write_config_byte(dev, 0x75, 0x0f);

	/* Set IRQ14 and IRQ15 to legacy IRQs */
	pci_read_config_word(dev, 0x46, &temp);
	temp |= 0xc000;
	pci_write_config_word(dev, 0x46, temp);

	/* Set i8259 interrupt trigger
	 * IRQ 3:  Level
	 * IRQ 4:  Level
	 * IRQ 5:  Level
	 * IRQ 6:  Level
	 * IRQ 7:  Level
	 * IRQ 9:  Level
	 * IRQ 10: Level
	 * IRQ 11: Level
	 * IRQ 12: Level
	 * IRQ 14: Edge
	 * IRQ 15: Edge
	 */
	outb(0xfa, 0x4d0);
	outb(0x1e, 0x4d1);
}

static void __devinit quirk_uli5288(struct pci_dev *dev)
{
	unsigned char c;

	pci_read_config_byte(dev,0x83,&c);
	c |= 0x80;
	pci_write_config_byte(dev, 0x83, c);

	pci_write_config_byte(dev, 0x09, 0x01);
	pci_write_config_byte(dev, 0x0a, 0x06);

	pci_read_config_byte(dev,0x83,&c);
	c &= 0x7f;
	pci_write_config_byte(dev, 0x83, c);

	pci_read_config_byte(dev,0x84,&c);
	c |= 0x01;
	pci_write_config_byte(dev, 0x84, c);
}

static void __devinit quirk_uli5229(struct pci_dev *dev)
{
	unsigned short temp;
	pci_write_config_word(dev, 0x04, 0x0405);
	pci_read_config_word(dev, 0x4a, &temp);
	temp |= 0x1000;
	pci_write_config_word(dev, 0x4a, temp);
}

static void __devinit early_uli5249(struct pci_dev *dev)
{
	unsigned char temp;
	pci_write_config_word(dev, 0x04, 0x0007);
	pci_read_config_byte(dev, 0x7c, &temp);
	pci_write_config_byte(dev, 0x7c, 0x80);
	pci_write_config_byte(dev, 0x09, 0x01);
	pci_write_config_byte(dev, 0x7c, temp);
	dev->class |= 0x1;
}

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_ali1575);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249);