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linux/arch/powerpc/platforms/fsl_uli1575.c
Kumar Gala 1fce2d01df powerpc: Fix boot hang regression on MPC8544DS 
Commit 00c5372d37 caused the MPC8544DS
board to hang at boot.  The MPC8544DS is unique in that it doesn't use
the PCI slots on the ULI (unlike the MPC8572DS or MPC8610HPCD).  So
the dummy read at the end of the address space causes us to hang.

We can detect the situation by comparing the bridge's BARs versus
the root complex.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-10-02 00:58:49 -05:00

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9.5 KiB
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/*
* ULI M1575 setup code - specific to Freescale boards
*
* Copyright 2007 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/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/mc146818rtc.h>
#include <asm/system.h>
#include <asm/pci-bridge.h>
#define ULI_PIRQA 0x08
#define ULI_PIRQB 0x09
#define ULI_PIRQC 0x0a
#define ULI_PIRQD 0x0b
#define ULI_PIRQE 0x0c
#define ULI_PIRQF 0x0d
#define ULI_PIRQG 0x0e
#define ULI_8259_NONE 0x00
#define ULI_8259_IRQ1 0x08
#define ULI_8259_IRQ3 0x02
#define ULI_8259_IRQ4 0x04
#define ULI_8259_IRQ5 0x05
#define ULI_8259_IRQ6 0x07
#define ULI_8259_IRQ7 0x06
#define ULI_8259_IRQ9 0x01
#define ULI_8259_IRQ10 0x03
#define ULI_8259_IRQ11 0x09
#define ULI_8259_IRQ12 0x0b
#define ULI_8259_IRQ14 0x0d
#define ULI_8259_IRQ15 0x0f
u8 uli_pirq_to_irq[8] = {
ULI_8259_IRQ9, /* PIRQA */
ULI_8259_IRQ10, /* PIRQB */
ULI_8259_IRQ11, /* PIRQC */
ULI_8259_IRQ12, /* PIRQD */
ULI_8259_IRQ5, /* PIRQE */
ULI_8259_IRQ6, /* PIRQF */
ULI_8259_IRQ7, /* PIRQG */
ULI_8259_NONE, /* PIRQH */
};
/* Bridge */
static void __devinit early_uli5249(struct pci_dev *dev)
{
unsigned char temp;
if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
!machine_is(mpc8572_ds))
return;
pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_IO |
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
/* read/write lock */
pci_read_config_byte(dev, 0x7c, &temp);
pci_write_config_byte(dev, 0x7c, 0x80);
/* set as P2P bridge */
pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
dev->class |= 0x1;
/* restore lock */
pci_write_config_byte(dev, 0x7c, temp);
}
static void __devinit quirk_uli1575(struct pci_dev *dev)
{
int i;
if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
!machine_is(mpc8572_ds))
return;
/*
* ULI1575 interrupts route setup
*/
/* ULI1575 IRQ mapping conf register maps PIRQx to IRQn */
for (i = 0; i < 4; i++) {
u8 val = uli_pirq_to_irq[i*2] | (uli_pirq_to_irq[i*2+1] << 4);
pci_write_config_byte(dev, 0x48 + i, val);
}
/* USB 1.1 OHCI controller 1: dev 28, func 0 - IRQ12 */
pci_write_config_byte(dev, 0x86, ULI_PIRQD);
/* USB 1.1 OHCI controller 2: dev 28, func 1 - IRQ9 */
pci_write_config_byte(dev, 0x87, ULI_PIRQA);
/* USB 1.1 OHCI controller 3: dev 28, func 2 - IRQ10 */
pci_write_config_byte(dev, 0x88, ULI_PIRQB);
/* Lan controller: dev 27, func 0 - IRQ6 */
pci_write_config_byte(dev, 0x89, ULI_PIRQF);
/* AC97 Audio controller: dev 29, func 0 - IRQ6 */
pci_write_config_byte(dev, 0x8a, ULI_PIRQF);
/* Modem controller: dev 29, func 1 - IRQ6 */
pci_write_config_byte(dev, 0x8b, ULI_PIRQF);
/* HD Audio controller: dev 29, func 2 - IRQ6 */
pci_write_config_byte(dev, 0x8c, ULI_PIRQF);
/* SATA controller: dev 31, func 1 - IRQ5 */
pci_write_config_byte(dev, 0x8d, ULI_PIRQE);
/* SMB interrupt: dev 30, func 1 - IRQ7 */
pci_write_config_byte(dev, 0x8e, ULI_PIRQG);
/* PMU ACPI SCI interrupt: dev 30, func 2 - IRQ7 */
pci_write_config_byte(dev, 0x8f, ULI_PIRQG);
/* USB 2.0 controller: dev 28, func 3 */
pci_write_config_byte(dev, 0x74, ULI_8259_IRQ11);
/* Primary PATA IDE IRQ: 14
* Secondary PATA IDE IRQ: 15
*/
pci_write_config_byte(dev, 0x44, 0x30 | ULI_8259_IRQ14);
pci_write_config_byte(dev, 0x75, ULI_8259_IRQ15);
}
static void __devinit quirk_final_uli1575(struct pci_dev *dev)
{
/* 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
*/
if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
!machine_is(mpc8572_ds))
return;
outb(0xfa, 0x4d0);
outb(0x1e, 0x4d1);
/* setup RTC */
CMOS_WRITE(RTC_SET, RTC_CONTROL);
CMOS_WRITE(RTC_24H, RTC_CONTROL);
/* ensure month, date, and week alarm fields are ignored */
CMOS_WRITE(0, RTC_VALID);
outb_p(0x7c, 0x72);
outb_p(RTC_ALARM_DONT_CARE, 0x73);
outb_p(0x7d, 0x72);
outb_p(RTC_ALARM_DONT_CARE, 0x73);
}
/* SATA */
static void __devinit quirk_uli5288(struct pci_dev *dev)
{
unsigned char c;
unsigned int d;
if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
!machine_is(mpc8572_ds))
return;
/* read/write lock */
pci_read_config_byte(dev, 0x83, &c);
pci_write_config_byte(dev, 0x83, c|0x80);
pci_read_config_dword(dev, PCI_CLASS_REVISION, &d);
d = (d & 0xff) | (PCI_CLASS_STORAGE_SATA_AHCI << 8);
pci_write_config_dword(dev, PCI_CLASS_REVISION, d);
/* restore lock */
pci_write_config_byte(dev, 0x83, c);
/* disable emulated PATA mode enabled */
pci_read_config_byte(dev, 0x84, &c);
pci_write_config_byte(dev, 0x84, c & ~0x01);
}
/* PATA */
static void __devinit quirk_uli5229(struct pci_dev *dev)
{
unsigned short temp;
if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
!machine_is(mpc8572_ds))
return;
pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE |
PCI_COMMAND_MASTER | PCI_COMMAND_IO);
/* Enable Native IRQ 14/15 */
pci_read_config_word(dev, 0x4a, &temp);
pci_write_config_word(dev, 0x4a, temp | 0x1000);
}
/* We have to do a dummy read on the P2P for the RTC to work, WTF */
static void __devinit quirk_final_uli5249(struct pci_dev *dev)
{
int i;
u8 *dummy;
struct pci_bus *bus = dev->bus;
resource_size_t end = 0;
for (i = PCI_BRIDGE_RESOURCES; i < PCI_BRIDGE_RESOURCES+3; i++) {
unsigned long flags = pci_resource_flags(dev, i);
if ((flags & (IORESOURCE_MEM|IORESOURCE_PREFETCH)) == IORESOURCE_MEM)
end = pci_resource_end(dev, i);
}
for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
if ((bus->resource[i]) &&
(bus->resource[i]->flags & IORESOURCE_MEM)) {
if (bus->resource[i]->end == end)
dummy = ioremap(bus->resource[i]->start, 0x4);
else
dummy = ioremap(bus->resource[i]->end - 3, 0x4);
if (dummy) {
in_8(dummy);
iounmap(dummy);
}
break;
}
}
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
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_FINAL(PCI_VENDOR_ID_AL, 0x5249, quirk_final_uli5249);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x1575, quirk_final_uli1575);
static void __devinit hpcd_quirk_uli1575(struct pci_dev *dev)
{
u32 temp32;
if (!machine_is(mpc86xx_hpcd))
return;
/* Disable INTx */
pci_read_config_dword(dev, 0x48, &temp32);
pci_write_config_dword(dev, 0x48, (temp32 | 1<<26));
/* Enable sideband interrupt */
pci_read_config_dword(dev, 0x90, &temp32);
pci_write_config_dword(dev, 0x90, (temp32 | 1<<22));
}
static void __devinit hpcd_quirk_uli5288(struct pci_dev *dev)
{
unsigned char c;
unsigned short temp;
if (!machine_is(mpc86xx_hpcd))
return;
/* Interrupt Disable, Needed when SATA disabled */
pci_read_config_word(dev, PCI_COMMAND, &temp);
temp |= 1<<10;
pci_write_config_word(dev, PCI_COMMAND, temp);
pci_read_config_byte(dev, 0x83, &c);
c |= 0x80;
pci_write_config_byte(dev, 0x83, c);
pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);
pci_read_config_byte(dev, 0x83, &c);
c &= 0x7f;
pci_write_config_byte(dev, 0x83, c);
}
/*
* Since 8259PIC was disabled on the board, the IDE device can not
* use the legacy IRQ, we need to let the IDE device work under
* native mode and use the interrupt line like other PCI devices.
* IRQ14 is a sideband interrupt from IDE device to CPU and we use this
* as the interrupt for IDE device.
*/
static void __devinit hpcd_quirk_uli5229(struct pci_dev *dev)
{
unsigned char c;
if (!machine_is(mpc86xx_hpcd))
return;
pci_read_config_byte(dev, 0x4b, &c);
c |= 0x10;
pci_write_config_byte(dev, 0x4b, c);
}
/*
* SATA interrupt pin bug fix
* There's a chip bug for 5288, The interrupt pin should be 2,
* not the read only value 1, So it use INTB#, not INTA# which
* actually used by the IDE device 5229.
* As of this bug, during the PCI initialization, 5288 read the
* irq of IDE device from the device tree, this function fix this
* bug by re-assigning a correct irq to 5288.
*
*/
static void __devinit hpcd_final_uli5288(struct pci_dev *dev)
{
struct pci_controller *hose = pci_bus_to_host(dev->bus);
struct device_node *hosenode = hose ? hose->dn : NULL;
struct of_irq oirq;
int virq, pin = 2;
u32 laddr[3];
if (!machine_is(mpc86xx_hpcd))
return;
if (!hosenode)
return;
laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(31, 0) << 8);
laddr[1] = laddr[2] = 0;
of_irq_map_raw(hosenode, &pin, 1, laddr, &oirq);
virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
oirq.size);
dev->irq = virq;
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, hpcd_quirk_uli1575);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, hpcd_quirk_uli5288);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, hpcd_quirk_uli5229);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, hpcd_final_uli5288);
int uli_exclude_device(struct pci_controller *hose,
u_char bus, u_char devfn)
{
if (bus == (hose->first_busno + 2)) {
/* exclude Modem controller */
if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 1))
return PCIBIOS_DEVICE_NOT_FOUND;
/* exclude HD Audio controller */
if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 2))
return PCIBIOS_DEVICE_NOT_FOUND;
}
return PCIBIOS_SUCCESSFUL;
}
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