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/*
* MPC85xx setup and early boot code plus other random bits.
*
* Maintained by Kumar Gala (see MAINTAINERS for contact information)
*
* Copyright 2005 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/root_dev.h>
#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/mpc85xx.h>
#include <asm/prom.h>
#include <asm/mpic.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
#include "mpc85xx.h"
#ifndef CONFIG_PCI
unsigned long isa_io_base = 0;
unsigned long isa_mem_base = 0;
#endif
/*
* Internal interrupts are all Level Sensitive, and Positive Polarity
*
* Note: Likely, this table and the following function should be
* obtained and derived from the OF Device Tree.
*/
static u_char mpc85xx_ads_openpic_initsenses[] __initdata = {
MPC85XX_INTERNAL_IRQ_SENSES,
0x0, /* External 0: */
#if defined(CONFIG_PCI)
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 1: PCI slot 0 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 2: PCI slot 1 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 3: PCI slot 2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 4: PCI slot 3 */
#else
0x0, /* External 1: */
0x0, /* External 2: */
0x0, /* External 3: */
0x0, /* External 4: */
#endif
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 5: PHY */
0x0, /* External 6: */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 7: PHY */
0x0, /* External 8: */
0x0, /* External 9: */
0x0, /* External 10: */
0x0, /* External 11: */
};
#ifdef CONFIG_PCI
/*
* interrupt routing
*/
int
mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* This is little evil, but works around the fact
* that revA boards have IDSEL starting at 18
* and others boards (older) start at 12
*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{PIRQA, PIRQB, PIRQC, PIRQD}, /* IDSEL 2 */
{PIRQD, PIRQA, PIRQB, PIRQC},
{PIRQC, PIRQD, PIRQA, PIRQB},
{PIRQB, PIRQC, PIRQD, PIRQA}, /* IDSEL 5 */
{0, 0, 0, 0}, /* -- */
{0, 0, 0, 0}, /* -- */
{0, 0, 0, 0}, /* -- */
{0, 0, 0, 0}, /* -- */
{0, 0, 0, 0}, /* -- */
{0, 0, 0, 0}, /* -- */
{PIRQA, PIRQB, PIRQC, PIRQD}, /* IDSEL 12 */
{PIRQD, PIRQA, PIRQB, PIRQC},
{PIRQC, PIRQD, PIRQA, PIRQB},
{PIRQB, PIRQC, PIRQD, PIRQA}, /* IDSEL 15 */
{0, 0, 0, 0}, /* -- */
{0, 0, 0, 0}, /* -- */
{PIRQA, PIRQB, PIRQC, PIRQD}, /* IDSEL 18 */
{PIRQD, PIRQA, PIRQB, PIRQC},
{PIRQC, PIRQD, PIRQA, PIRQB},
{PIRQB, PIRQC, PIRQD, PIRQA}, /* IDSEL 21 */
};
const long min_idsel = 2, max_idsel = 21, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
int
mpc85xx_exclude_device(u_char bus, u_char devfn)
{
if (bus == 0 && PCI_SLOT(devfn) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
else
return PCIBIOS_SUCCESSFUL;
}
#endif /* CONFIG_PCI */
void __init mpc85xx_ads_pic_init(void)
{
struct mpic *mpic1;
phys_addr_t OpenPIC_PAddr;
/* Determine the Physical Address of the OpenPIC regs */
OpenPIC_PAddr = get_immrbase() + MPC85xx_OPENPIC_OFFSET;
mpic1 = mpic_alloc(OpenPIC_PAddr,
MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
4, MPC85xx_OPENPIC_IRQ_OFFSET, 0, 250,
mpc85xx_ads_openpic_initsenses,
sizeof(mpc85xx_ads_openpic_initsenses),
" OpenPIC ");
BUG_ON(mpic1 == NULL);
mpic_assign_isu(mpic1, 0, OpenPIC_PAddr + 0x10200);
mpic_assign_isu(mpic1, 1, OpenPIC_PAddr + 0x10280);
mpic_assign_isu(mpic1, 2, OpenPIC_PAddr + 0x10300);
mpic_assign_isu(mpic1, 3, OpenPIC_PAddr + 0x10380);
mpic_assign_isu(mpic1, 4, OpenPIC_PAddr + 0x10400);
mpic_assign_isu(mpic1, 5, OpenPIC_PAddr + 0x10480);
mpic_assign_isu(mpic1, 6, OpenPIC_PAddr + 0x10500);
mpic_assign_isu(mpic1, 7, OpenPIC_PAddr + 0x10580);
/* dummy mappings to get to 48 */
mpic_assign_isu(mpic1, 8, OpenPIC_PAddr + 0x10600);
mpic_assign_isu(mpic1, 9, OpenPIC_PAddr + 0x10680);
mpic_assign_isu(mpic1, 10, OpenPIC_PAddr + 0x10700);
mpic_assign_isu(mpic1, 11, OpenPIC_PAddr + 0x10780);
/* External ints */
mpic_assign_isu(mpic1, 12, OpenPIC_PAddr + 0x10000);
mpic_assign_isu(mpic1, 13, OpenPIC_PAddr + 0x10080);
mpic_assign_isu(mpic1, 14, OpenPIC_PAddr + 0x10100);
mpic_init(mpic1);
}
/*
* Setup the architecture
*/
static void __init mpc85xx_ads_setup_arch(void)
{
struct device_node *cpu;
struct device_node *np;
if (ppc_md.progress)
ppc_md.progress("mpc85xx_ads_setup_arch()", 0);
cpu = of_find_node_by_type(NULL, "cpu");
if (cpu != 0) {
const unsigned int *fp;
fp = get_property(cpu, "clock-frequency", NULL);
if (fp != 0)
loops_per_jiffy = *fp / HZ;
else
loops_per_jiffy = 50000000 / HZ;
of_node_put(cpu);
}
#ifdef CONFIG_PCI
for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
add_bridge(np);
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = mpc85xx_map_irq;
ppc_md.pci_exclude_device = mpc85xx_exclude_device;
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_HDA1;
#endif
}
void mpc85xx_ads_show_cpuinfo(struct seq_file *m)
{
uint pvid, svid, phid1;
uint memsize = total_memory;
pvid = mfspr(SPRN_PVR);
svid = mfspr(SPRN_SVR);
seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
seq_printf(m, "Machine\t\t: mpc85xx\n");
seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
seq_printf(m, "SVR\t\t: 0x%x\n", svid);
/* Display cpu Pll setting */
phid1 = mfspr(SPRN_HID1);
seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
/* Display the amount of memory */
seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
}
/*
* Called very early, device-tree isn't unflattened
*/
static int __init mpc85xx_ads_probe(void)
{
/* We always match for now, eventually we should look at the flat
dev tree to ensure this is the board we are suppose to run on
*/
return 1;
}
define_machine(mpc85xx_ads) {
.name = "MPC85xx ADS",
.probe = mpc85xx_ads_probe,
.setup_arch = mpc85xx_ads_setup_arch,
.init_IRQ = mpc85xx_ads_pic_init,
.show_cpuinfo = mpc85xx_ads_show_cpuinfo,
.get_irq = mpic_get_irq,
.restart = mpc85xx_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
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