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linux-sg2042/arch/ppc/platforms/pcore.c

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/*
* arch/ppc/platforms/pcore_setup.c
*
* Setup routines for Force PCORE boards
*
* Author: Matt Porter <mporter@mvista.com>
*
* 2001 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#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/types.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/i8259.h>
#include <asm/mpc10x.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/kgdb.h>
#include "pcore.h"
extern unsigned long loops_per_jiffy;
static int board_type;
static inline int __init
pcore_6750_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
*/
{
{9, 10, 11, 12}, /* IDSEL 24 - DEC 21554 */
{10, 0, 0, 0}, /* IDSEL 25 - DEC 21143 */
{11, 12, 9, 10}, /* IDSEL 26 - PMC I */
{12, 9, 10, 11}, /* IDSEL 27 - PMC II */
{0, 0, 0, 0}, /* IDSEL 28 - unused */
{0, 0, 9, 0}, /* IDSEL 29 - unused */
{0, 0, 0, 0}, /* IDSEL 30 - Winbond */
};
const long min_idsel = 24, max_idsel = 30, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
};
static inline int __init
pcore_680_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
*/
{
{9, 10, 11, 12}, /* IDSEL 24 - Sentinel */
{10, 0, 0, 0}, /* IDSEL 25 - i82559 #1 */
{11, 12, 9, 10}, /* IDSEL 26 - PMC I */
{12, 9, 10, 11}, /* IDSEL 27 - PMC II */
{9, 0, 0, 0}, /* IDSEL 28 - i82559 #2 */
{0, 0, 0, 0}, /* IDSEL 29 - unused */
{0, 0, 0, 0}, /* IDSEL 30 - Winbond */
};
const long min_idsel = 24, max_idsel = 30, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
};
void __init
pcore_pcibios_fixup(void)
{
struct pci_dev *dev;
if ((dev = pci_get_device(PCI_VENDOR_ID_WINBOND,
PCI_DEVICE_ID_WINBOND_83C553,
0)))
{
/* Reroute interrupts both IDE channels to 15 */
pci_write_config_byte(dev,
PCORE_WINBOND_IDE_INT,
0xff);
/* Route INTA-D to IRQ9-12, respectively */
pci_write_config_word(dev,
PCORE_WINBOND_PCI_INT,
0x9abc);
/*
* Set up 8259 edge/level triggering
*/
outb(0x00, PCORE_WINBOND_PRI_EDG_LVL);
outb(0x1e, PCORE_WINBOND_SEC_EDG_LVL);
pci_dev_put(dev);
}
}
int __init
pcore_find_bridges(void)
{
struct pci_controller* hose;
int host_bridge, board_type;
hose = pcibios_alloc_controller();
if (!hose)
return 0;
mpc10x_bridge_init(hose,
MPC10X_MEM_MAP_B,
MPC10X_MEM_MAP_B,
MPC10X_MAPB_EUMB_BASE);
/* Determine board type */
early_read_config_dword(hose,
0,
PCI_DEVFN(0,0),
PCI_VENDOR_ID,
&host_bridge);
if (host_bridge == MPC10X_BRIDGE_106)
board_type = PCORE_TYPE_6750;
else /* MPC10X_BRIDGE_107 */
board_type = PCORE_TYPE_680;
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pcibios_fixup = pcore_pcibios_fixup;
ppc_md.pci_swizzle = common_swizzle;
if (board_type == PCORE_TYPE_6750)
ppc_md.pci_map_irq = pcore_6750_map_irq;
else /* PCORE_TYPE_680 */
ppc_md.pci_map_irq = pcore_680_map_irq;
return board_type;
}
/* Dummy variable to satisfy mpc10x_common.o */
void *OpenPIC_Addr;
static int
pcore_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: Force Computers\n");
if (board_type == PCORE_TYPE_6750)
seq_printf(m, "machine\t\t: PowerCore 6750\n");
else /* PCORE_TYPE_680 */
seq_printf(m, "machine\t\t: PowerCore 680\n");
seq_printf(m, "L2\t\t: " );
if (board_type == PCORE_TYPE_6750)
switch (readb(PCORE_DCCR_REG) & PCORE_DCCR_L2_MASK)
{
case PCORE_DCCR_L2_0KB:
seq_printf(m, "nocache");
break;
case PCORE_DCCR_L2_256KB:
seq_printf(m, "256KB");
break;
case PCORE_DCCR_L2_1MB:
seq_printf(m, "1MB");
break;
case PCORE_DCCR_L2_512KB:
seq_printf(m, "512KB");
break;
default:
seq_printf(m, "error");
break;
}
else /* PCORE_TYPE_680 */
switch (readb(PCORE_DCCR_REG) & PCORE_DCCR_L2_MASK)
{
case PCORE_DCCR_L2_2MB:
seq_printf(m, "2MB");
break;
case PCORE_DCCR_L2_256KB:
seq_printf(m, "reserved");
break;
case PCORE_DCCR_L2_1MB:
seq_printf(m, "1MB");
break;
case PCORE_DCCR_L2_512KB:
seq_printf(m, "512KB");
break;
default:
seq_printf(m, "error");
break;
}
seq_printf(m, "\n");
return 0;
}
static void __init
pcore_setup_arch(void)
{
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000/HZ;
/* Lookup PCI host bridges */
board_type = pcore_find_bridges();
#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_SDA2;
#endif
printk(KERN_INFO "Force PowerCore ");
if (board_type == PCORE_TYPE_6750)
printk("6750\n");
else
printk("680\n");
printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
_set_L2CR(L2CR_L2E | _get_L2CR());
}
static void
pcore_restart(char *cmd)
{
local_irq_disable();
/* Hard reset */
writeb(0x11, 0xfe000332);
while(1);
}
static void
pcore_halt(void)
{
local_irq_disable();
/* Turn off user LEDs */
writeb(0x00, 0xfe000300);
while (1);
}
static void
pcore_power_off(void)
{
pcore_halt();
}
static void __init
pcore_init_IRQ(void)
{
int i;
for ( i = 0 ; i < 16 ; i++ )
irq_desc[i].handler = &i8259_pic;
i8259_init(0);
}
/*
* Set BAT 3 to map 0xf0000000 to end of physical memory space.
*/
static __inline__ void
pcore_set_bat(void)
{
mb();
mtspr(SPRN_DBAT3U, 0xf0001ffe);
mtspr(SPRN_DBAT3L, 0xfe80002a);
mb();
}
static unsigned long __init
pcore_find_end_of_memory(void)
{
return mpc10x_get_mem_size(MPC10X_MEM_MAP_B);
}
static void __init
pcore_map_io(void)
{
io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
}
TODC_ALLOC();
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
parse_bootinfo(find_bootinfo());
/* Cover I/O space with a BAT */
/* yuck, better hope your ram size is a power of 2 -- paulus */
pcore_set_bat();
isa_io_base = MPC10X_MAPB_ISA_IO_BASE;
isa_mem_base = MPC10X_MAPB_ISA_MEM_BASE;
pci_dram_offset = MPC10X_MAPB_DRAM_OFFSET;
ppc_md.setup_arch = pcore_setup_arch;
ppc_md.show_cpuinfo = pcore_show_cpuinfo;
ppc_md.init_IRQ = pcore_init_IRQ;
ppc_md.get_irq = i8259_irq;
ppc_md.find_end_of_memory = pcore_find_end_of_memory;
ppc_md.setup_io_mappings = pcore_map_io;
ppc_md.restart = pcore_restart;
ppc_md.power_off = pcore_power_off;
ppc_md.halt = pcore_halt;
TODC_INIT(TODC_TYPE_MK48T59,
PCORE_NVRAM_AS0,
PCORE_NVRAM_AS1,
PCORE_NVRAM_DATA,
8);
ppc_md.time_init = todc_time_init;
ppc_md.get_rtc_time = todc_get_rtc_time;
ppc_md.set_rtc_time = todc_set_rtc_time;
ppc_md.calibrate_decr = todc_calibrate_decr;
ppc_md.nvram_read_val = todc_m48txx_read_val;
ppc_md.nvram_write_val = todc_m48txx_write_val;
#ifdef CONFIG_SERIAL_TEXT_DEBUG
ppc_md.progress = gen550_progress;
#endif
#ifdef CONFIG_KGDB
ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
#endif
}
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