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/*
* MPC8610 HPCD board specific routines
*
* Initial author: Xianghua Xiao <x.xiao@freescale.com>
* Recode: Jason Jin <jason.jin@freescale.com>
*
* Rewrite the interrupt routing. remove the 8259PIC support,
* All the integrated device in ULI use sideband interrupt.
*
* 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/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/mpc86xx.h>
#include <asm/prom.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>
#include <asm/mpic.h>
#include <sysdev/fsl_pci.h>
#include <sysdev/fsl_soc.h>
void __init
mpc86xx_hpcd_init_irq(void)
{
struct mpic *mpic1;
struct device_node *np;
struct resource res;
/* Determine PIC address. */
np = of_find_node_by_type(NULL, "open-pic");
if (np == NULL)
return;
of_address_to_resource(np, 0, &res);
/* Alloc mpic structure and per isu has 16 INT entries. */
mpic1 = mpic_alloc(np, res.start,
MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
0, 256, " MPIC ");
BUG_ON(mpic1 == NULL);
mpic_init(mpic1);
}
#ifdef CONFIG_PCI
static void __devinit quirk_uli1575(struct pci_dev *dev)
{
u32 temp32;
/* 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 quirk_uli5288(struct pci_dev *dev)
{
unsigned char c;
unsigned short temp;
/* 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 quirk_uli5229(struct pci_dev *dev)
{
unsigned char c;
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 final_uli5288(struct pci_dev *dev)
{
struct pci_controller *hose = pci_bus_to_host(dev->bus);
struct device_node *hosenode = hose ? hose->arch_data : NULL;
struct of_irq oirq;
int virq, pin = 2;
u32 laddr[3];
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, 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, 0x5288, final_uli5288);
#endif /* CONFIG_PCI */
static void __init
mpc86xx_hpcd_setup_arch(void)
{
#ifdef CONFIG_PCI
struct device_node *np;
#endif
if (ppc_md.progress)
ppc_md.progress("mpc86xx_hpcd_setup_arch()", 0);
#ifdef CONFIG_PCI
for_each_node_by_type(np, "pci") {
if (of_device_is_compatible(np, "fsl,mpc8610-pci")
|| of_device_is_compatible(np, "fsl,mpc8641-pcie")) {
struct resource rsrc;
of_address_to_resource(np, 0, &rsrc);
if ((rsrc.start & 0xfffff) == 0xa000)
fsl_add_bridge(np, 1);
else
fsl_add_bridge(np, 0);
}
}
#endif
printk("MPC86xx HPCD board from Freescale Semiconductor\n");
}
/*
* Called very early, device-tree isn't unflattened
*/
static int __init mpc86xx_hpcd_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (of_flat_dt_is_compatible(root, "fsl,MPC8610HPCD"))
return 1; /* Looks good */
return 0;
}
long __init
mpc86xx_time_init(void)
{
unsigned int temp;
/* Set the time base to zero */
mtspr(SPRN_TBWL, 0);
mtspr(SPRN_TBWU, 0);
temp = mfspr(SPRN_HID0);
temp |= HID0_TBEN;
mtspr(SPRN_HID0, temp);
asm volatile("isync");
return 0;
}
define_machine(mpc86xx_hpcd) {
.name = "MPC86xx HPCD",
.probe = mpc86xx_hpcd_probe,
.setup_arch = mpc86xx_hpcd_setup_arch,
.init_IRQ = mpc86xx_hpcd_init_irq,
.get_irq = mpic_get_irq,
.restart = fsl_rstcr_restart,
.time_init = mpc86xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
};
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