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setup.c

/*
 *  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.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Copyright 2001 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *              ahennessy@mvista.com
 *
 * Copyright (C) 2000-2001 Toshiba Corporation
 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <asm/reboot.h>
#include <asm/txx9pio.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/jmr3927.h>
#include <asm/mipsregs.h>

static void jmr3927_machine_restart(char *command)
{
      local_irq_disable();
#if 1 /* Resetting PCI bus */
      jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
      jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI, JMR3927_IOC_RESET_ADDR);
      (void)jmr3927_ioc_reg_in(JMR3927_IOC_RESET_ADDR);     /* flush WB */
      mdelay(1);
      jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
#endif
      jmr3927_ioc_reg_out(JMR3927_IOC_RESET_CPU, JMR3927_IOC_RESET_ADDR);
      /* fallback */
      (*_machine_halt)();
}

static void __init jmr3927_time_init(void)
{
      tx3927_time_init(0, 1);
}

#define DO_WRITE_THROUGH
#define DO_ENABLE_CACHE

static void jmr3927_board_init(void);

static void __init jmr3927_mem_setup(void)
{
      char *argptr;

      set_io_port_base(JMR3927_PORT_BASE + JMR3927_PCIIO);

      _machine_restart = jmr3927_machine_restart;

      /* cache setup */
      {
            unsigned int conf;
#ifdef DO_ENABLE_CACHE
            int mips_ic_disable = 0, mips_dc_disable = 0;
#else
            int mips_ic_disable = 1, mips_dc_disable = 1;
#endif
#ifdef DO_WRITE_THROUGH
            int mips_config_cwfon = 0;
            int mips_config_wbon = 0;
#else
            int mips_config_cwfon = 1;
            int mips_config_wbon = 1;
#endif

            conf = read_c0_conf();
            conf &= ~(TX39_CONF_ICE | TX39_CONF_DCE |
                    TX39_CONF_WBON | TX39_CONF_CWFON);
            conf |= mips_ic_disable ? 0 : TX39_CONF_ICE;
            conf |= mips_dc_disable ? 0 : TX39_CONF_DCE;
            conf |= mips_config_wbon ? TX39_CONF_WBON : 0;
            conf |= mips_config_cwfon ? TX39_CONF_CWFON : 0;

            write_c0_conf(conf);
            write_c0_cache(0);
      }

      /* initialize board */
      jmr3927_board_init();

      tx3927_sio_init(0, 1 << 1); /* ch1: noCTS */
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
      argptr = prom_getcmdline();
      if (!strstr(argptr, "console="))
            strcat(argptr, " console=ttyS1,115200");
#endif
}

static void __init jmr3927_pci_setup(void)
{
#ifdef CONFIG_PCI
      int extarb = !(tx3927_ccfgptr->ccfg & TX3927_CCFG_PCIXARB);
      struct pci_controller *c;

      c = txx9_alloc_pci_controller(&txx9_primary_pcic,
                              JMR3927_PCIMEM, JMR3927_PCIMEM_SIZE,
                              JMR3927_PCIIO, JMR3927_PCIIO_SIZE);
      register_pci_controller(c);
      if (!extarb) {
            /* Reset PCI Bus */
            jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
            udelay(100);
            jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI,
                            JMR3927_IOC_RESET_ADDR);
            udelay(100);
            jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
      }
      tx3927_pcic_setup(c, JMR3927_SDRAM_SIZE, extarb);
      tx3927_setup_pcierr_irq();
#endif /* CONFIG_PCI */
}

static void __init jmr3927_board_init(void)
{
      txx9_cpu_clock = JMR3927_CORECLK;
      /* SDRAMC are configured by PROM */

      /* ROMC */
      tx3927_romcptr->cr[1] = JMR3927_ROMCE1 | 0x00030048;
      tx3927_romcptr->cr[2] = JMR3927_ROMCE2 | 0x000064c8;
      tx3927_romcptr->cr[3] = JMR3927_ROMCE3 | 0x0003f698;
      tx3927_romcptr->cr[5] = JMR3927_ROMCE5 | 0x0000f218;

      /* Pin selection */
      tx3927_ccfgptr->pcfg &= ~TX3927_PCFG_SELALL;
      tx3927_ccfgptr->pcfg |=
            TX3927_PCFG_SELSIOC(0) | TX3927_PCFG_SELSIO_ALL |
            (TX3927_PCFG_SELDMA_ALL & ~TX3927_PCFG_SELDMA(1));

      tx3927_setup();

      /* PIO[15:12] connected to LEDs */
      __raw_writel(0x0000f000, &tx3927_pioptr->dir);
      gpio_request(11, "dipsw1");
      gpio_request(10, "dipsw2");

      jmr3927_pci_setup();

      /* SIO0 DTR on */
      jmr3927_ioc_reg_out(0, JMR3927_IOC_DTR_ADDR);

      jmr3927_led_set(0);

      printk(KERN_INFO
             "JMR-TX3927 (Rev %d) --- IOC(Rev %d) DIPSW:%d,%d,%d,%d\n",
             jmr3927_ioc_reg_in(JMR3927_IOC_BREV_ADDR) & JMR3927_REV_MASK,
             jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR) & JMR3927_REV_MASK,
             jmr3927_dipsw1(), jmr3927_dipsw2(),
             jmr3927_dipsw3(), jmr3927_dipsw4());
}

/* This trick makes rtc-ds1742 driver usable as is. */
static unsigned long jmr3927_swizzle_addr_b(unsigned long port)
{
      if ((port & 0xffff0000) != JMR3927_IOC_NVRAMB_ADDR)
            return port;
      port = (port & 0xffff0000) | (port & 0x7fff << 1);
#ifdef __BIG_ENDIAN
      return port;
#else
      return port | 1;
#endif
}

static void __init jmr3927_rtc_init(void)
{
      static struct resource __initdata res = {
            .start      = JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
            .end  = JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
            .flags      = IORESOURCE_MEM,
      };
      platform_device_register_simple("rtc-ds1742", -1, &res, 1);
}

static void __init jmr3927_device_init(void)
{
      __swizzle_addr_b = jmr3927_swizzle_addr_b;
      jmr3927_rtc_init();
      tx3927_wdt_init();
}

struct txx9_board_vec jmr3927_vec __initdata = {
      .system = "Toshiba JMR_TX3927",
      .prom_init = jmr3927_prom_init,
      .mem_setup = jmr3927_mem_setup,
      .irq_setup = jmr3927_irq_setup,
      .time_init = jmr3927_time_init,
      .device_init = jmr3927_device_init,
#ifdef CONFIG_PCI
      .pci_map_irq = jmr3927_pci_map_irq,
#endif
};

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