Logo Search packages:      
Sourcecode: linux version File versions

setup_tx3927.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);
}

Generated by  Doxygen 1.6.0   Back to index