ba8c6d534a
Fight the Good Fight: Limit prom.h header creep. Signed-off-by: Jon Loeliger <jdl@freescale.com> Signed-off-by: Kumar Gala <kumar.gala@freescale.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
165 lines
3.6 KiB
C
165 lines
3.6 KiB
C
/*
|
|
* arch/ppc/syslib/ppc83xx_setup.c
|
|
*
|
|
* MPC83XX common board code
|
|
*
|
|
* Maintainer: Kumar Gala <kumar.gala@freescale.com>
|
|
*
|
|
* 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/config.h>
|
|
#include <linux/types.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/tty.h> /* for linux/serial_core.h */
|
|
#include <linux/serial_core.h>
|
|
#include <linux/serial_8250.h>
|
|
|
|
#include <asm/time.h>
|
|
#include <asm/mpc83xx.h>
|
|
#include <asm/mmu.h>
|
|
#include <asm/ppc_sys.h>
|
|
#include <asm/kgdb.h>
|
|
#include <asm/delay.h>
|
|
|
|
#include <syslib/ppc83xx_setup.h>
|
|
|
|
phys_addr_t immrbar;
|
|
|
|
/* Return the amount of memory */
|
|
unsigned long __init
|
|
mpc83xx_find_end_of_memory(void)
|
|
{
|
|
bd_t *binfo;
|
|
|
|
binfo = (bd_t *) __res;
|
|
|
|
return binfo->bi_memsize;
|
|
}
|
|
|
|
long __init
|
|
mpc83xx_time_init(void)
|
|
{
|
|
#define SPCR_OFFS 0x00000110
|
|
#define SPCR_TBEN 0x00400000
|
|
|
|
bd_t *binfo = (bd_t *)__res;
|
|
u32 *spcr = ioremap(binfo->bi_immr_base + SPCR_OFFS, 4);
|
|
|
|
*spcr |= SPCR_TBEN;
|
|
|
|
iounmap(spcr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* The decrementer counts at the system (internal) clock freq divided by 4 */
|
|
void __init
|
|
mpc83xx_calibrate_decr(void)
|
|
{
|
|
bd_t *binfo = (bd_t *) __res;
|
|
unsigned int freq, divisor;
|
|
|
|
freq = binfo->bi_busfreq;
|
|
divisor = 4;
|
|
tb_ticks_per_jiffy = freq / HZ / divisor;
|
|
tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
|
|
}
|
|
|
|
#ifdef CONFIG_SERIAL_8250
|
|
void __init
|
|
mpc83xx_early_serial_map(void)
|
|
{
|
|
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
|
|
struct uart_port serial_req;
|
|
#endif
|
|
struct plat_serial8250_port *pdata;
|
|
bd_t *binfo = (bd_t *) __res;
|
|
pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC83xx_DUART);
|
|
|
|
/* Setup serial port access */
|
|
pdata[0].uartclk = binfo->bi_busfreq;
|
|
pdata[0].mapbase += binfo->bi_immr_base;
|
|
pdata[0].membase = ioremap(pdata[0].mapbase, 0x100);
|
|
|
|
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
|
|
memset(&serial_req, 0, sizeof (serial_req));
|
|
serial_req.iotype = SERIAL_IO_MEM;
|
|
serial_req.mapbase = pdata[0].mapbase;
|
|
serial_req.membase = pdata[0].membase;
|
|
serial_req.regshift = 0;
|
|
|
|
gen550_init(0, &serial_req);
|
|
#endif
|
|
|
|
pdata[1].uartclk = binfo->bi_busfreq;
|
|
pdata[1].mapbase += binfo->bi_immr_base;
|
|
pdata[1].membase = ioremap(pdata[1].mapbase, 0x100);
|
|
|
|
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
|
|
/* Assume gen550_init() doesn't modify serial_req */
|
|
serial_req.mapbase = pdata[1].mapbase;
|
|
serial_req.membase = pdata[1].membase;
|
|
|
|
gen550_init(1, &serial_req);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
void
|
|
mpc83xx_restart(char *cmd)
|
|
{
|
|
volatile unsigned char __iomem *reg;
|
|
unsigned char tmp;
|
|
|
|
reg = ioremap(BCSR_PHYS_ADDR, BCSR_SIZE);
|
|
|
|
local_irq_disable();
|
|
|
|
/*
|
|
* Unlock the BCSR bits so a PRST will update the contents.
|
|
* Otherwise the reset asserts but doesn't clear.
|
|
*/
|
|
tmp = in_8(reg + BCSR_MISC_REG3_OFF);
|
|
tmp |= BCSR_MISC_REG3_CNFLOCK; /* low true, high false */
|
|
out_8(reg + BCSR_MISC_REG3_OFF, tmp);
|
|
|
|
/*
|
|
* Trigger a reset via a low->high transition of the
|
|
* PORESET bit.
|
|
*/
|
|
tmp = in_8(reg + BCSR_MISC_REG2_OFF);
|
|
tmp &= ~BCSR_MISC_REG2_PORESET;
|
|
out_8(reg + BCSR_MISC_REG2_OFF, tmp);
|
|
|
|
udelay(1);
|
|
|
|
tmp |= BCSR_MISC_REG2_PORESET;
|
|
out_8(reg + BCSR_MISC_REG2_OFF, tmp);
|
|
|
|
for(;;);
|
|
}
|
|
|
|
void
|
|
mpc83xx_power_off(void)
|
|
{
|
|
local_irq_disable();
|
|
for(;;);
|
|
}
|
|
|
|
void
|
|
mpc83xx_halt(void)
|
|
{
|
|
local_irq_disable();
|
|
for(;;);
|
|
}
|
|
|
|
/* PCI SUPPORT DOES NOT EXIT, MODEL after ppc85xx_setup.c */
|