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original_kernel/arch/ppc/platforms/85xx/stx_gp3.c

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/*
* arch/ppc/platforms/85xx/stx_gp3.c
*
* STx GP3 board specific routines
*
* Dan Malek <dan@embeddededge.com>
* Copyright 2004 Embedded Edge, LLC
*
* Copied from mpc8560_ads.c
* Copyright 2002, 2003 Motorola Inc.
*
* Ported to 2.6, Matt Porter <mporter@kernel.crashing.org>
* Copyright 2004-2005 MontaVista Software, 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/config.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/root_dev.h>
#include <linux/seq_file.h>
#include <linux/serial.h>
#include <linux/initrd.h>
#include <linux/module.h>
#include <linux/fsl_devices.h>
#include <linux/interrupt.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/open_pic.h>
#include <asm/bootinfo.h>
#include <asm/pci-bridge.h>
#include <asm/mpc85xx.h>
#include <asm/irq.h>
#include <asm/immap_85xx.h>
#include <asm/immap_cpm2.h>
#include <asm/mpc85xx.h>
#include <asm/ppc_sys.h>
#include <syslib/cpm2_pic.h>
#include <syslib/ppc85xx_common.h>
extern void cpm2_reset(void);
unsigned char __res[sizeof(bd_t)];
#ifndef CONFIG_PCI
unsigned long isa_io_base = 0;
unsigned long isa_mem_base = 0;
unsigned long pci_dram_offset = 0;
#endif
/* Internal interrupts are all Level Sensitive, and Positive Polarity */
static u8 gp3_openpic_initsenses[] __initdata = {
MPC85XX_INTERNAL_IRQ_SENSES,
0x0, /* External 0: */
#if defined(CONFIG_PCI)
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 1: PCI slot 0 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 2: PCI slot 1 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 3: PCI slot 2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 4: PCI slot 3 */
#else
0x0, /* External 1: */
0x0, /* External 2: */
0x0, /* External 3: */
0x0, /* External 4: */
#endif
0x0, /* External 5: */
0x0, /* External 6: */
0x0, /* External 7: */
0x0, /* External 8: */
0x0, /* External 9: */
0x0, /* External 10: */
0x0, /* External 11: */
};
/*
* Setup the architecture
*/
static void __init
gp3_setup_arch(void)
{
bd_t *binfo = (bd_t *) __res;
unsigned int freq;
struct gianfar_platform_data *pdata;
cpm2_reset();
/* get the core frequency */
freq = binfo->bi_intfreq;
if (ppc_md.progress)
ppc_md.progress("gp3_setup_arch()", 0);
/* Set loops_per_jiffy to a half-way reasonable value,
for use until calibrate_delay gets called. */
loops_per_jiffy = freq / HZ;
#ifdef CONFIG_PCI
/* setup PCI host bridges */
mpc85xx_setup_hose();
#endif
/* setup the board related information for the enet controllers */
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
if (pdata) {
/* pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
pdata->interruptPHY = MPC85xx_IRQ_EXT5;
pdata->phyid = 2;
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
}
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
if (pdata) {
/* pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
pdata->interruptPHY = MPC85xx_IRQ_EXT5;
pdata->phyid = 4;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
}
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_HDA1;
#endif
printk ("bi_immr_base = %8.8lx\n", binfo->bi_immr_base);
}
static irqreturn_t cpm2_cascade(int irq, void *dev_id, struct pt_regs *regs)
{
while ((irq = cpm2_get_irq(regs)) >= 0)
__do_IRQ(irq, regs);
return IRQ_HANDLED;
}
static struct irqaction cpm2_irqaction = {
.handler = cpm2_cascade,
.flags = SA_INTERRUPT,
.mask = CPU_MASK_NONE,
.name = "cpm2_cascade",
};
static void __init
gp3_init_IRQ(void)
{
bd_t *binfo = (bd_t *) __res;
/*
* Setup OpenPIC
*/
/* Determine the Physical Address of the OpenPIC regs */
phys_addr_t OpenPIC_PAddr =
binfo->bi_immr_base + MPC85xx_OPENPIC_OFFSET;
OpenPIC_Addr = ioremap(OpenPIC_PAddr, MPC85xx_OPENPIC_SIZE);
OpenPIC_InitSenses = gp3_openpic_initsenses;
OpenPIC_NumInitSenses = sizeof (gp3_openpic_initsenses);
/* Skip reserved space and internal sources */
openpic_set_sources(0, 32, OpenPIC_Addr + 0x10200);
/* Map PIC IRQs 0-11 */
openpic_set_sources(48, 12, OpenPIC_Addr + 0x10000);
/*
* Let openpic interrupts starting from an offset, to
* leave space for cascading interrupts underneath.
*/
openpic_init(MPC85xx_OPENPIC_IRQ_OFFSET);
/* Setup CPM2 PIC */
cpm2_init_IRQ();
setup_irq(MPC85xx_IRQ_CPM, &cpm2_irqaction);
return;
}
static int
gp3_show_cpuinfo(struct seq_file *m)
{
uint pvid, svid, phid1;
bd_t *binfo = (bd_t *) __res;
uint memsize;
unsigned int freq;
extern unsigned long total_memory; /* in mm/init */
/* get the core frequency */
freq = binfo->bi_intfreq;
pvid = mfspr(SPRN_PVR);
svid = mfspr(SPRN_SVR);
memsize = total_memory;
seq_printf(m, "Vendor\t\t: RPC Electronics STx \n");
seq_printf(m, "Machine\t\t: GP3 - MPC%s\n", cur_ppc_sys_spec->ppc_sys_name);
seq_printf(m, "bus freq\t: %u.%.6u MHz\n", freq / 1000000,
freq % 1000000);
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));
return 0;
}
#ifdef CONFIG_PCI
int mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel,
unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{PIRQA, PIRQB, PIRQC, PIRQD},
{PIRQD, PIRQA, PIRQB, PIRQC},
{PIRQC, PIRQD, PIRQA, PIRQB},
{PIRQB, PIRQC, PIRQD, PIRQA},
};
const long min_idsel = 12, max_idsel = 15, 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
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
/* parse_bootinfo must always be called first */
parse_bootinfo(find_bootinfo());
/*
* If we were passed in a board information, copy it into the
* residual data area.
*/
if (r3) {
memcpy((void *) __res, (void *) (r3 + KERNELBASE),
sizeof (bd_t));
}
#if defined(CONFIG_BLK_DEV_INITRD)
/*
* If the init RAM disk has been configured in, and there's a valid
* starting address for it, set it up.
*/
if (r4) {
initrd_start = r4 + KERNELBASE;
initrd_end = r5 + KERNELBASE;
}
#endif /* CONFIG_BLK_DEV_INITRD */
/* Copy the kernel command line arguments to a safe place. */
if (r6) {
*(char *) (r7 + KERNELBASE) = 0;
strcpy(cmd_line, (char *) (r6 + KERNELBASE));
}
identify_ppc_sys_by_id(mfspr(SPRN_SVR));
/* setup the PowerPC module struct */
ppc_md.setup_arch = gp3_setup_arch;
ppc_md.show_cpuinfo = gp3_show_cpuinfo;
ppc_md.init_IRQ = gp3_init_IRQ;
ppc_md.get_irq = openpic_get_irq;
ppc_md.restart = mpc85xx_restart;
ppc_md.power_off = mpc85xx_power_off;
ppc_md.halt = mpc85xx_halt;
ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
ppc_md.calibrate_decr = mpc85xx_calibrate_decr;
if (ppc_md.progress)
ppc_md.progress("platform_init(): exit", 0);
return;
}
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