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android_kernel_xiaomi_sm8350/arch/powerpc/platforms/fsl_uli1575.c
Kumar Gala b66510cb99 [POWERPC] Fix interrupt routing and setup of ULI M1575 on FSL boards 
The interrupt routing in the device trees for the ULI M1575 was
inproperly using the interrupt line field as pci function.  Fixed
up the device tree's to actual conform for to specification and
changed the interrupt mapping code so it just uses a static mapping
setup as follows:

PIRQA - IRQ9
PIRQB - IRQ10
PIRQC - IRQ11
PIRQD - IRQ12
USB 1.1 OCHI (1c.0) - IRQ12
USB 1.1 OCHI (1c.1) - IRQ9
USB 1.1 OCHI (1c.2) - IRQ10
USB 1.1 ECHI (1c.3) - IRQ11
LAN (1b.0) - IRQ6
AC97 (1d.0) - IRQ6
Modem (1d.1) - IRQ6
HD Audio (1d.2) - IRQ6
SATA (1f.1) - IRQ5
SMB (1e.1) - IRQ7
PMU (1e.2) - IRQ7
PATA (1f.0) - IRQ14/15

Took the oppurtunity to refactor the code into a single file so we
don't have to duplicate these fixes on the two current boards in the
tree and several forth coming boards that will also need the code.

Fixed RTC support that requires a dummy memory read on the P2P bridge
to unlock the RTC and setup the default of the RTC alarm registers to
match with a basic x86 style CMOS RTC.

Moved code that poked ISA registers to a FIXUP_FINAL quirk to ensure
the PCI IO space has been setup properly before we start poking ISA
registers at random locations.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-08-17 13:22:16 -05:00

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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 */
};
/* set in board code if you want this quirks to do something */
int uses_fsl_uli_m1575;
/* Bridge */
static void __devinit early_uli5249(struct pci_dev *dev)
{
unsigned char temp;
if (!uses_fsl_uli_m1575)
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 (!uses_fsl_uli_m1575)
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 (!uses_fsl_uli_m1575)
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 (!uses_fsl_uli_m1575)
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 (!uses_fsl_uli_m1575)
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;
for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
if ((bus->resource[i]) &&
(bus->resource[i]->flags & IORESOURCE_MEM)) {
dummy = ioremap(bus->resource[i]->start, 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);
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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