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setup.c

/*
 * Toshiba RBTX4939 setup routines.
 * Based on linux/arch/mips/txx9/rbtx4938/setup.c,
 *        and RBTX49xx patch from CELF patch archive.
 *
 * Copyright (C) 2000-2001,2005-2007 Toshiba Corporation
 * 2003-2005 (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/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/interrupt.h>
#include <linux/smc91x.h>
#include <asm/reboot.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/rbtx4939.h>

static void rbtx4939_machine_restart(char *command)
{
      local_irq_disable();
      writeb(1, rbtx4939_reseten_addr);
      writeb(1, rbtx4939_softreset_addr);
      while (1)
            ;
}

static void __init rbtx4939_time_init(void)
{
      tx4939_time_init(0);
}

#if defined(__BIG_ENDIAN) && \
      (defined(CONFIG_SMC91X) || defined(CONFIG_SMC91X_MODULE))
#define HAVE_RBTX4939_IOSWAB
#define IS_CE1_ADDR(addr) \
      ((((unsigned long)(addr) - IO_BASE) & 0xfff00000) == TXX9_CE(1))
static u16 rbtx4939_ioswabw(volatile u16 *a, u16 x)
{
      return IS_CE1_ADDR(a) ? x : le16_to_cpu(x);
}
static u16 rbtx4939_mem_ioswabw(volatile u16 *a, u16 x)
{
      return !IS_CE1_ADDR(a) ? x : le16_to_cpu(x);
}
#endif /* __BIG_ENDIAN && CONFIG_SMC91X */

static void __init rbtx4939_pci_setup(void)
{
#ifdef CONFIG_PCI
      int extarb = !(__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCIARB);
      struct pci_controller *c = &txx9_primary_pcic;

      register_pci_controller(c);

      tx4939_report_pciclk();
      tx4927_pcic_setup(tx4939_pcicptr, c, extarb);
      if (!(__raw_readq(&tx4939_ccfgptr->pcfg) & TX4939_PCFG_ATA1MODE) &&
          (__raw_readq(&tx4939_ccfgptr->pcfg) &
           (TX4939_PCFG_ET0MODE | TX4939_PCFG_ET1MODE))) {
            tx4939_report_pci1clk();

            /* mem:64K(max), io:64K(max) (enough for ETH0,ETH1) */
            c = txx9_alloc_pci_controller(NULL, 0, 0x10000, 0, 0x10000);
            register_pci_controller(c);
            tx4927_pcic_setup(tx4939_pcic1ptr, c, 0);
      }

      tx4939_setup_pcierr_irq();
#endif /* CONFIG_PCI */
}

static unsigned long long default_ebccr[] __initdata = {
      0x01c0000000007608ULL, /* 64M ROM */
      0x017f000000007049ULL, /* 1M IOC */
      0x0180000000408608ULL, /* ISA */
      0,
};

static void __init rbtx4939_ebusc_setup(void)
{
      int i;
      unsigned int sp;

      /* use user-configured speed */
      sp = TX4939_EBUSC_CR(0) & 0x30;
      default_ebccr[0] |= sp;
      default_ebccr[1] |= sp;
      default_ebccr[2] |= sp;
      /* initialise by myself */
      for (i = 0; i < ARRAY_SIZE(default_ebccr); i++) {
            if (default_ebccr[i])
                  ____raw_writeq(default_ebccr[i],
                               &tx4939_ebuscptr->cr[i]);
            else
                  ____raw_writeq(____raw_readq(&tx4939_ebuscptr->cr[i])
                               & ~8,
                               &tx4939_ebuscptr->cr[i]);
      }
}

static void __init rbtx4939_update_ioc_pen(void)
{
      __u64 pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
      __u64 ccfg = ____raw_readq(&tx4939_ccfgptr->ccfg);
      __u8 pe1 = readb(rbtx4939_pe1_addr);
      __u8 pe2 = readb(rbtx4939_pe2_addr);
      __u8 pe3 = readb(rbtx4939_pe3_addr);
      if (pcfg & TX4939_PCFG_ATA0MODE)
            pe1 |= RBTX4939_PE1_ATA(0);
      else
            pe1 &= ~RBTX4939_PE1_ATA(0);
      if (pcfg & TX4939_PCFG_ATA1MODE) {
            pe1 |= RBTX4939_PE1_ATA(1);
            pe1 &= ~(RBTX4939_PE1_RMII(0) | RBTX4939_PE1_RMII(1));
      } else {
            pe1 &= ~RBTX4939_PE1_ATA(1);
            if (pcfg & TX4939_PCFG_ET0MODE)
                  pe1 |= RBTX4939_PE1_RMII(0);
            else
                  pe1 &= ~RBTX4939_PE1_RMII(0);
            if (pcfg & TX4939_PCFG_ET1MODE)
                  pe1 |= RBTX4939_PE1_RMII(1);
            else
                  pe1 &= ~RBTX4939_PE1_RMII(1);
      }
      if (ccfg & TX4939_CCFG_PTSEL)
            pe3 &= ~(RBTX4939_PE3_VP | RBTX4939_PE3_VP_P |
                   RBTX4939_PE3_VP_S);
      else {
            __u64 vmode = pcfg &
                  (TX4939_PCFG_VSSMODE | TX4939_PCFG_VPSMODE);
            if (vmode == 0)
                  pe3 &= ~(RBTX4939_PE3_VP | RBTX4939_PE3_VP_P |
                         RBTX4939_PE3_VP_S);
            else if (vmode == TX4939_PCFG_VPSMODE) {
                  pe3 |= RBTX4939_PE3_VP_P;
                  pe3 &= ~(RBTX4939_PE3_VP | RBTX4939_PE3_VP_S);
            } else if (vmode == TX4939_PCFG_VSSMODE) {
                  pe3 |= RBTX4939_PE3_VP | RBTX4939_PE3_VP_S;
                  pe3 &= ~RBTX4939_PE3_VP_P;
            } else {
                  pe3 |= RBTX4939_PE3_VP | RBTX4939_PE3_VP_P;
                  pe3 &= ~RBTX4939_PE3_VP_S;
            }
      }
      if (pcfg & TX4939_PCFG_SPIMODE) {
            if (pcfg & TX4939_PCFG_SIO2MODE_GPIO)
                  pe2 &= ~(RBTX4939_PE2_SIO2 | RBTX4939_PE2_SIO0);
            else {
                  if (pcfg & TX4939_PCFG_SIO2MODE_SIO2) {
                        pe2 |= RBTX4939_PE2_SIO2;
                        pe2 &= ~RBTX4939_PE2_SIO0;
                  } else {
                        pe2 |= RBTX4939_PE2_SIO0;
                        pe2 &= ~RBTX4939_PE2_SIO2;
                  }
            }
            if (pcfg & TX4939_PCFG_SIO3MODE)
                  pe2 |= RBTX4939_PE2_SIO3;
            else
                  pe2 &= ~RBTX4939_PE2_SIO3;
            pe2 &= ~RBTX4939_PE2_SPI;
      } else {
            pe2 |= RBTX4939_PE2_SPI;
            pe2 &= ~(RBTX4939_PE2_SIO3 | RBTX4939_PE2_SIO2 |
                   RBTX4939_PE2_SIO0);
      }
      if ((pcfg & TX4939_PCFG_I2SMODE_MASK) == TX4939_PCFG_I2SMODE_GPIO)
            pe2 |= RBTX4939_PE2_GPIO;
      else
            pe2 &= ~RBTX4939_PE2_GPIO;
      writeb(pe1, rbtx4939_pe1_addr);
      writeb(pe2, rbtx4939_pe2_addr);
      writeb(pe3, rbtx4939_pe3_addr);
}

#define RBTX4939_MAX_7SEGLEDS 8

#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
static u8 led_val[RBTX4939_MAX_7SEGLEDS];
struct rbtx4939_led_data {
      struct led_classdev cdev;
      char name[32];
      unsigned int num;
};

/* Use "dot" in 7seg LEDs */
static void rbtx4939_led_brightness_set(struct led_classdev *led_cdev,
                              enum led_brightness value)
{
      struct rbtx4939_led_data *led_dat =
            container_of(led_cdev, struct rbtx4939_led_data, cdev);
      unsigned int num = led_dat->num;
      unsigned long flags;

      local_irq_save(flags);
      led_val[num] = (led_val[num] & 0x7f) | (value ? 0x80 : 0);
      writeb(led_val[num], rbtx4939_7seg_addr(num / 4, num % 4));
      local_irq_restore(flags);
}

static int __init rbtx4939_led_probe(struct platform_device *pdev)
{
      struct rbtx4939_led_data *leds_data;
      int i;
      static char *default_triggers[] __initdata = {
            "heartbeat",
            "ide-disk",
            "nand-disk",
      };

      leds_data = kzalloc(sizeof(*leds_data) * RBTX4939_MAX_7SEGLEDS,
                      GFP_KERNEL);
      if (!leds_data)
            return -ENOMEM;
      for (i = 0; i < RBTX4939_MAX_7SEGLEDS; i++) {
            int rc;
            struct rbtx4939_led_data *led_dat = &leds_data[i];

            led_dat->num = i;
            led_dat->cdev.brightness_set = rbtx4939_led_brightness_set;
            sprintf(led_dat->name, "rbtx4939:amber:%u", i);
            led_dat->cdev.name = led_dat->name;
            if (i < ARRAY_SIZE(default_triggers))
                  led_dat->cdev.default_trigger = default_triggers[i];
            rc = led_classdev_register(&pdev->dev, &led_dat->cdev);
            if (rc < 0)
                  return rc;
            led_dat->cdev.brightness_set(&led_dat->cdev, 0);
      }
      return 0;

}

static struct platform_driver rbtx4939_led_driver = {
      .driver  = {
            .name = "rbtx4939-led",
            .owner = THIS_MODULE,
      },
};

static void __init rbtx4939_led_setup(void)
{
      platform_device_register_simple("rbtx4939-led", -1, NULL, 0);
      platform_driver_probe(&rbtx4939_led_driver, rbtx4939_led_probe);
}
#else
static inline void rbtx4939_led_setup(void)
{
}
#endif

static void __rbtx4939_7segled_putc(unsigned int pos, unsigned char val)
{
#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
      unsigned long flags;
      local_irq_save(flags);
      /* bit7: reserved for LED class */
      led_val[pos] = (led_val[pos] & 0x80) | (val & 0x7f);
      val = led_val[pos];
      local_irq_restore(flags);
#endif
      writeb(val, rbtx4939_7seg_addr(pos / 4, pos % 4));
}

static void rbtx4939_7segled_putc(unsigned int pos, unsigned char val)
{
      /* convert from map_to_seg7() notation */
      val = (val & 0x88) |
            ((val & 0x40) >> 6) |
            ((val & 0x20) >> 4) |
            ((val & 0x10) >> 2) |
            ((val & 0x04) << 2) |
            ((val & 0x02) << 4) |
            ((val & 0x01) << 6);
      __rbtx4939_7segled_putc(pos, val);
}

static void __init rbtx4939_arch_init(void)
{
      rbtx4939_pci_setup();
}

static void __init rbtx4939_device_init(void)
{
      unsigned long smc_addr = RBTX4939_ETHER_ADDR - IO_BASE;
      struct resource smc_res[] = {
            {
                  .start      = smc_addr,
                  .end  = smc_addr + 0x10 - 1,
                  .flags      = IORESOURCE_MEM,
            }, {
                  .start      = RBTX4939_IRQ_ETHER,
                  /* override default irq flag defined in smc91x.h */
                  .flags      = IORESOURCE_IRQ | IRQF_TRIGGER_LOW,
            },
      };
      struct smc91x_platdata smc_pdata = {
            .flags = SMC91X_USE_16BIT,
      };
      struct platform_device *pdev;
#if defined(CONFIG_TC35815) || defined(CONFIG_TC35815_MODULE)
      int i, j;
      unsigned char ethaddr[2][6];
      u8 bdipsw = readb(rbtx4939_bdipsw_addr) & 0x0f;

      for (i = 0; i < 2; i++) {
            unsigned long area = CKSEG1 + 0x1fff0000 + (i * 0x10);
            if (bdipsw == 0)
                  memcpy(ethaddr[i], (void *)area, 6);
            else {
                  u16 buf[3];
                  if (bdipsw & 8)
                        area -= 0x03000000;
                  else
                        area -= 0x01000000;
                  for (j = 0; j < 3; j++)
                        buf[j] = le16_to_cpup((u16 *)(area + j * 2));
                  memcpy(ethaddr[i], buf, 6);
            }
      }
      tx4939_ethaddr_init(ethaddr[0], ethaddr[1]);
#endif
      pdev = platform_device_alloc("smc91x", -1);
      if (!pdev ||
          platform_device_add_resources(pdev, smc_res, ARRAY_SIZE(smc_res)) ||
          platform_device_add_data(pdev, &smc_pdata, sizeof(smc_pdata)) ||
          platform_device_add(pdev))
            platform_device_put(pdev);
      rbtx4939_led_setup();
      tx4939_wdt_init();
      tx4939_ata_init();
}

static void __init rbtx4939_setup(void)
{
      int i;

      rbtx4939_ebusc_setup();
      /* always enable ATA0 */
      txx9_set64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_ATA0MODE);
      rbtx4939_update_ioc_pen();
      if (txx9_master_clock == 0)
            txx9_master_clock = 20000000;
      tx4939_setup();
#ifdef HAVE_RBTX4939_IOSWAB
      ioswabw = rbtx4939_ioswabw;
      __mem_ioswabw = rbtx4939_mem_ioswabw;
#endif

      _machine_restart = rbtx4939_machine_restart;

      txx9_7segled_init(RBTX4939_MAX_7SEGLEDS, rbtx4939_7segled_putc);
      for (i = 0; i < RBTX4939_MAX_7SEGLEDS; i++)
            txx9_7segled_putc(i, '-');
      pr_info("RBTX4939 (Rev %02x) --- FPGA(Rev %02x) DIPSW:%02x,%02x\n",
            readb(rbtx4939_board_rev_addr), readb(rbtx4939_ioc_rev_addr),
            readb(rbtx4939_udipsw_addr), readb(rbtx4939_bdipsw_addr));

#ifdef CONFIG_PCI
      txx9_alloc_pci_controller(&txx9_primary_pcic, 0, 0, 0, 0);
      txx9_board_pcibios_setup = tx4927_pcibios_setup;
#else
      set_io_port_base(RBTX4939_ETHER_BASE);
#endif

      tx4939_sio_init(TX4939_SCLK0(txx9_master_clock), 0);
}

struct txx9_board_vec rbtx4939_vec __initdata = {
      .system = "Tothiba RBTX4939",
      .prom_init = rbtx4939_prom_init,
      .mem_setup = rbtx4939_setup,
      .irq_setup = rbtx4939_irq_setup,
      .time_init = rbtx4939_time_init,
      .device_init = rbtx4939_device_init,
      .arch_init = rbtx4939_arch_init,
#ifdef CONFIG_PCI
      .pci_map_irq = tx4939_pci_map_irq,
#endif
};

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