138 строки
3.6 KiB
C
138 строки
3.6 KiB
C
/*
|
|
* TX3927 setup routines
|
|
* Based on linux/arch/mips/txx9/jmr3927/setup.c
|
|
*
|
|
* Copyright 2001 MontaVista Software Inc.
|
|
* Copyright (C) 2000-2001 Toshiba Corporation
|
|
* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/param.h>
|
|
#include <linux/io.h>
|
|
#include <linux/mtd/physmap.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/txx9irq.h>
|
|
#include <asm/txx9tmr.h>
|
|
#include <asm/txx9pio.h>
|
|
#include <asm/txx9/generic.h>
|
|
#include <asm/txx9/tx3927.h>
|
|
|
|
void __init tx3927_wdt_init(void)
|
|
{
|
|
txx9_wdt_init(TX3927_TMR_REG(2));
|
|
}
|
|
|
|
void __init tx3927_setup(void)
|
|
{
|
|
int i;
|
|
unsigned int conf;
|
|
|
|
txx9_reg_res_init(TX3927_REV_PCODE(), TX3927_REG_BASE,
|
|
TX3927_REG_SIZE);
|
|
|
|
/* SDRAMC,ROMC are configured by PROM */
|
|
for (i = 0; i < 8; i++) {
|
|
if (!(tx3927_romcptr->cr[i] & 0x8))
|
|
continue; /* disabled */
|
|
txx9_ce_res[i].start = (unsigned long)TX3927_ROMC_BA(i);
|
|
txx9_ce_res[i].end =
|
|
txx9_ce_res[i].start + TX3927_ROMC_SIZE(i) - 1;
|
|
request_resource(&iomem_resource, &txx9_ce_res[i]);
|
|
}
|
|
|
|
/* clocks */
|
|
txx9_gbus_clock = txx9_cpu_clock / 2;
|
|
/* change default value to udelay/mdelay take reasonable time */
|
|
loops_per_jiffy = txx9_cpu_clock / HZ / 2;
|
|
|
|
/* CCFG */
|
|
/* enable Timeout BusError */
|
|
if (txx9_ccfg_toeon)
|
|
tx3927_ccfgptr->ccfg |= TX3927_CCFG_TOE;
|
|
|
|
/* clear BusErrorOnWrite flag */
|
|
tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
|
|
if (read_c0_conf() & TX39_CONF_WBON)
|
|
/* Disable PCI snoop */
|
|
tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
|
|
else
|
|
/* Enable PCI SNOOP - with write through only */
|
|
tx3927_ccfgptr->ccfg |= TX3927_CCFG_PSNP;
|
|
/* do reset on watchdog */
|
|
tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;
|
|
|
|
printk(KERN_INFO "TX3927 -- CRIR:%08lx CCFG:%08lx PCFG:%08lx\n",
|
|
tx3927_ccfgptr->crir,
|
|
tx3927_ccfgptr->ccfg, tx3927_ccfgptr->pcfg);
|
|
|
|
/* TMR */
|
|
for (i = 0; i < TX3927_NR_TMR; i++)
|
|
txx9_tmr_init(TX3927_TMR_REG(i));
|
|
|
|
/* DMA */
|
|
tx3927_dmaptr->mcr = 0;
|
|
for (i = 0; i < ARRAY_SIZE(tx3927_dmaptr->ch); i++) {
|
|
/* reset channel */
|
|
tx3927_dmaptr->ch[i].ccr = TX3927_DMA_CCR_CHRST;
|
|
tx3927_dmaptr->ch[i].ccr = 0;
|
|
}
|
|
/* enable DMA */
|
|
#ifdef __BIG_ENDIAN
|
|
tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN;
|
|
#else
|
|
tx3927_dmaptr->mcr = TX3927_DMA_MCR_MSTEN | TX3927_DMA_MCR_LE;
|
|
#endif
|
|
|
|
/* PIO */
|
|
__raw_writel(0, &tx3927_pioptr->maskcpu);
|
|
__raw_writel(0, &tx3927_pioptr->maskext);
|
|
txx9_gpio_init(TX3927_PIO_REG, 0, 16);
|
|
|
|
conf = read_c0_conf();
|
|
if (conf & TX39_CONF_DCE) {
|
|
if (!(conf & TX39_CONF_WBON))
|
|
pr_info("TX3927 D-Cache WriteThrough.\n");
|
|
else if (!(conf & TX39_CONF_CWFON))
|
|
pr_info("TX3927 D-Cache WriteBack.\n");
|
|
else
|
|
pr_info("TX3927 D-Cache WriteBack (CWF) .\n");
|
|
}
|
|
}
|
|
|
|
void __init tx3927_time_init(unsigned int evt_tmrnr, unsigned int src_tmrnr)
|
|
{
|
|
txx9_clockevent_init(TX3927_TMR_REG(evt_tmrnr),
|
|
TXX9_IRQ_BASE + TX3927_IR_TMR(evt_tmrnr),
|
|
TXX9_IMCLK);
|
|
txx9_clocksource_init(TX3927_TMR_REG(src_tmrnr), TXX9_IMCLK);
|
|
}
|
|
|
|
void __init tx3927_sio_init(unsigned int sclk, unsigned int cts_mask)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
txx9_sio_init(TX3927_SIO_REG(i),
|
|
TXX9_IRQ_BASE + TX3927_IR_SIO(i),
|
|
i, sclk, (1 << i) & cts_mask);
|
|
}
|
|
|
|
void __init tx3927_mtd_init(int ch)
|
|
{
|
|
struct physmap_flash_data pdata = {
|
|
.width = TX3927_ROMC_WIDTH(ch) / 8,
|
|
};
|
|
unsigned long start = txx9_ce_res[ch].start;
|
|
unsigned long size = txx9_ce_res[ch].end - start + 1;
|
|
|
|
if (!(tx3927_romcptr->cr[ch] & 0x8))
|
|
return; /* disabled */
|
|
txx9_physmap_flash_init(ch, start, size, &pdata);
|
|
}
|