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netwinder-hw.c

/*
 * linux/arch/arm/mach-footbridge/netwinder-hw.c
 *
 * Netwinder machine fixup
 *
 * Copyright (C) 1998, 1999 Russell King, Phil Blundell
 */
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>

#include <asm/hardware/dec21285.h>
#include <asm/io.h>
#include <asm/leds.h>
#include <asm/mach-types.h>
#include <asm/setup.h>

#include <asm/mach/arch.h>

#include "common.h"

#define IRDA_IO_BASE          0x180
#define GP1_IO_BASE           0x338
#define GP2_IO_BASE           0x33a


#ifdef CONFIG_LEDS
#define DEFAULT_LEDS    0
#else
#define DEFAULT_LEDS    GPIO_GREEN_LED
#endif

/*
 * Winbond WB83977F accessibility stuff
 */
static inline void wb977_open(void)
{
      outb(0x87, 0x370);
      outb(0x87, 0x370);
}

static inline void wb977_close(void)
{
      outb(0xaa, 0x370);
}

static inline void wb977_wb(int reg, int val)
{
      outb(reg, 0x370);
      outb(val, 0x371);
}

static inline void wb977_ww(int reg, int val)
{
      outb(reg, 0x370);
      outb(val >> 8, 0x371);
      outb(reg + 1, 0x370);
      outb(val & 255, 0x371);
}

#define wb977_device_select(dev)    wb977_wb(0x07, dev)
#define wb977_device_disable()            wb977_wb(0x30, 0x00)
#define wb977_device_enable()       wb977_wb(0x30, 0x01)

/*
 * This is a lock for accessing ports GP1_IO_BASE and GP2_IO_BASE
 */
DEFINE_SPINLOCK(gpio_lock);

static unsigned int current_gpio_op;
static unsigned int current_gpio_io;
static unsigned int current_cpld;

void gpio_modify_op(int mask, int set)
{
      unsigned int new_gpio, changed;

      new_gpio = (current_gpio_op & ~mask) | set;
      changed = new_gpio ^ current_gpio_op;
      current_gpio_op = new_gpio;

      if (changed & 0xff)
            outb(new_gpio, GP1_IO_BASE);
      if (changed & 0xff00)
            outb(new_gpio >> 8, GP2_IO_BASE);
}

static inline void __gpio_modify_io(int mask, int in)
{
      unsigned int new_gpio, changed;
      int port;

      new_gpio = (current_gpio_io & ~mask) | in;
      changed = new_gpio ^ current_gpio_io;
      current_gpio_io = new_gpio;

      changed >>= 1;
      new_gpio >>= 1;

      wb977_device_select(7);

      for (port = 0xe1; changed && port < 0xe8; changed >>= 1) {
            wb977_wb(port, new_gpio & 1);

            port += 1;
            new_gpio >>= 1;
      }

      wb977_device_select(8);

      for (port = 0xe8; changed && port < 0xec; changed >>= 1) {
            wb977_wb(port, new_gpio & 1);

            port += 1;
            new_gpio >>= 1;
      }
}

void gpio_modify_io(int mask, int in)
{
      /* Open up the SuperIO chip */
      wb977_open();

      __gpio_modify_io(mask, in);

      /* Close up the EFER gate */
      wb977_close();
}

int gpio_read(void)
{
      return inb(GP1_IO_BASE) | inb(GP2_IO_BASE) << 8;
}

/*
 * Initialise the Winbond W83977F global registers
 */
static inline void wb977_init_global(void)
{
      /*
       * Enable R/W config registers
       */
      wb977_wb(0x26, 0x40);

      /*
       * Power down FDC (not used)
       */
      wb977_wb(0x22, 0xfe);

      /*
       * GP12, GP11, CIRRX, IRRXH, GP10
       */
      wb977_wb(0x2a, 0xc1);

      /*
       * GP23, GP22, GP21, GP20, GP13
       */
      wb977_wb(0x2b, 0x6b);

      /*
       * GP17, GP16, GP15, GP14
       */
      wb977_wb(0x2c, 0x55);
}

/*
 * Initialise the Winbond W83977F printer port
 */
static inline void wb977_init_printer(void)
{
      wb977_device_select(1);

      /*
       * mode 1 == EPP
       */
      wb977_wb(0xf0, 0x01);
}

/*
 * Initialise the Winbond W83977F keyboard controller
 */
static inline void wb977_init_keyboard(void)
{
      wb977_device_select(5);

      /*
       * Keyboard controller address
       */
      wb977_ww(0x60, 0x0060);
      wb977_ww(0x62, 0x0064);

      /*
       * Keyboard IRQ 1, active high, edge trigger
       */
      wb977_wb(0x70, 1);
      wb977_wb(0x71, 0x02);

      /*
       * Mouse IRQ 5, active high, edge trigger
       */
      wb977_wb(0x72, 5);
      wb977_wb(0x73, 0x02);

      /*
       * KBC 8MHz
       */
      wb977_wb(0xf0, 0x40);

      /*
       * Enable device
       */
      wb977_device_enable();
}

/*
 * Initialise the Winbond W83977F Infra-Red device
 */
static inline void wb977_init_irda(void)
{
      wb977_device_select(6);

      /*
       * IR base address
       */
      wb977_ww(0x60, IRDA_IO_BASE);

      /*
       * IRDA IRQ 6, active high, edge trigger
       */
      wb977_wb(0x70, 6);
      wb977_wb(0x71, 0x02);

      /*
       * RX DMA - ISA DMA 0
       */
      wb977_wb(0x74, 0x00);

      /*
       * TX DMA - Disable Tx DMA
       */
      wb977_wb(0x75, 0x04);

      /*
       * Append CRC, Enable bank selection
       */
      wb977_wb(0xf0, 0x03);

      /*
       * Enable device
       */
      wb977_device_enable();
}

/*
 * Initialise Winbond W83977F general purpose IO
 */
static inline void wb977_init_gpio(void)
{
      unsigned long flags;

      /*
       * Set up initial I/O definitions
       */
      current_gpio_io = -1;
      __gpio_modify_io(-1, GPIO_DONE | GPIO_WDTIMER);

      wb977_device_select(7);

      /*
       * Group1 base address
       */
      wb977_ww(0x60, GP1_IO_BASE);
      wb977_ww(0x62, 0);
      wb977_ww(0x64, 0);

      /*
       * GP10 (Orage button) IRQ 10, active high, edge trigger
       */
      wb977_wb(0x70, 10);
      wb977_wb(0x71, 0x02);

      /*
       * GP10: Debounce filter enabled, IRQ, input
       */
      wb977_wb(0xe0, 0x19);

      /*
       * Enable Group1
       */
      wb977_device_enable();

      wb977_device_select(8);

      /*
       * Group2 base address
       */
      wb977_ww(0x60, GP2_IO_BASE);

      /*
       * Clear watchdog timer regs
       *  - timer disable
       */
      wb977_wb(0xf2, 0x00);

      /*
       *  - disable LED, no mouse nor keyboard IRQ
       */
      wb977_wb(0xf3, 0x00);

      /*
       *  - timer counting, disable power LED, disable timeouot
       */
      wb977_wb(0xf4, 0x00);

      /*
       * Enable group2
       */
      wb977_device_enable();

      /*
       * Set Group1/Group2 outputs
       */
      spin_lock_irqsave(&gpio_lock, flags);
      gpio_modify_op(-1, GPIO_RED_LED | GPIO_FAN);
      spin_unlock_irqrestore(&gpio_lock, flags);
}

/*
 * Initialise the Winbond W83977F chip.
 */
static void __init wb977_init(void)
{
      request_region(0x370, 2, "W83977AF configuration");

      /*
       * Open up the SuperIO chip
       */
      wb977_open();

      /*
       * Initialise the global registers
       */
      wb977_init_global();

      /*
       * Initialise the various devices in
       * the multi-IO chip.
       */
      wb977_init_printer();
      wb977_init_keyboard();
      wb977_init_irda();
      wb977_init_gpio();

      /*
       * Close up the EFER gate
       */
      wb977_close();
}

void cpld_modify(int mask, int set)
{
      int msk;

      current_cpld = (current_cpld & ~mask) | set;

      gpio_modify_io(GPIO_DATA | GPIO_IOCLK | GPIO_IOLOAD, 0);
      gpio_modify_op(GPIO_IOLOAD, 0);

      for (msk = 8; msk; msk >>= 1) {
            int bit = current_cpld & msk;

            gpio_modify_op(GPIO_DATA | GPIO_IOCLK, bit ? GPIO_DATA : 0);
            gpio_modify_op(GPIO_IOCLK, GPIO_IOCLK);
      }

      gpio_modify_op(GPIO_IOCLK|GPIO_DATA, 0);
      gpio_modify_op(GPIO_IOLOAD|GPIO_DSCLK, GPIO_IOLOAD|GPIO_DSCLK);
      gpio_modify_op(GPIO_IOLOAD, 0);
}

static void __init cpld_init(void)
{
      unsigned long flags;

      spin_lock_irqsave(&gpio_lock, flags);
      cpld_modify(-1, CPLD_UNMUTE | CPLD_7111_DISABLE);
      spin_unlock_irqrestore(&gpio_lock, flags);
}

static unsigned char rwa_unlock[] __initdata =
{ 0x00, 0x00, 0x6a, 0xb5, 0xda, 0xed, 0xf6, 0xfb, 0x7d, 0xbe, 0xdf, 0x6f, 0x37, 0x1b,
  0x0d, 0x86, 0xc3, 0x61, 0xb0, 0x58, 0x2c, 0x16, 0x8b, 0x45, 0xa2, 0xd1, 0xe8, 0x74,
  0x3a, 0x9d, 0xce, 0xe7, 0x73, 0x39 };

#ifndef DEBUG
#define dprintk(x...)
#else
#define dprintk(x...) printk(x)
#endif

#define WRITE_RWA(r,v) do { outb((r), 0x279); udelay(10); outb((v), 0xa79); } while (0)

static inline void rwa010_unlock(void)
{
      int i;

      WRITE_RWA(2, 2);
      mdelay(10);

      for (i = 0; i < sizeof(rwa_unlock); i++) {
            outb(rwa_unlock[i], 0x279);
            udelay(10);
      }
}

static inline void rwa010_read_ident(void)
{
      unsigned char si[9];
      int i, j;

      WRITE_RWA(3, 0);
      WRITE_RWA(0, 128);

      outb(1, 0x279);

      mdelay(1);

      dprintk("Identifier: ");
      for (i = 0; i < 9; i++) {
            si[i] = 0;
            for (j = 0; j < 8; j++) {
                  int bit;
                  udelay(250);
                  inb(0x203);
                  udelay(250);
                  bit = inb(0x203);
                  dprintk("%02X ", bit);
                  bit = (bit == 0xaa) ? 1 : 0;
                  si[i] |= bit << j;
            }
            dprintk("(%02X) ", si[i]);
      }
      dprintk("\n");
}

static inline void rwa010_global_init(void)
{
      WRITE_RWA(6, 2);  // Assign a card no = 2

      dprintk("Card no = %d\n", inb(0x203));

      /* disable the modem section of the chip */
      WRITE_RWA(7, 3);
      WRITE_RWA(0x30, 0);

      /* disable the cdrom section of the chip */
      WRITE_RWA(7, 4);
      WRITE_RWA(0x30, 0);

      /* disable the MPU-401 section of the chip */
      WRITE_RWA(7, 2);
      WRITE_RWA(0x30, 0);
}

static inline void rwa010_game_port_init(void)
{
      int i;

      WRITE_RWA(7, 5);

      dprintk("Slider base: ");
      WRITE_RWA(0x61, 1);
      i = inb(0x203);

      WRITE_RWA(0x60, 2);
      dprintk("%02X%02X (201)\n", inb(0x203), i);

      WRITE_RWA(0x30, 1);
}

static inline void rwa010_waveartist_init(int base, int irq, int dma)
{
      int i;

      WRITE_RWA(7, 0);

      dprintk("WaveArtist base: ");
      WRITE_RWA(0x61, base & 255);
      i = inb(0x203);

      WRITE_RWA(0x60, base >> 8);
      dprintk("%02X%02X (%X),", inb(0x203), i, base);

      WRITE_RWA(0x70, irq);
      dprintk(" irq: %d (%d),", inb(0x203), irq);

      WRITE_RWA(0x74, dma);
      dprintk(" dma: %d (%d)\n", inb(0x203), dma);

      WRITE_RWA(0x30, 1);
}

static inline void rwa010_soundblaster_init(int sb_base, int al_base, int irq, int dma)
{
      int i;

      WRITE_RWA(7, 1);

      dprintk("SoundBlaster base: ");
      WRITE_RWA(0x61, sb_base & 255);
      i = inb(0x203);

      WRITE_RWA(0x60, sb_base >> 8);
      dprintk("%02X%02X (%X),", inb(0x203), i, sb_base);

      dprintk(" irq: ");
      WRITE_RWA(0x70, irq);
      dprintk("%d (%d),", inb(0x203), irq);

      dprintk(" 8-bit DMA: ");
      WRITE_RWA(0x74, dma);
      dprintk("%d (%d)\n", inb(0x203), dma);

      dprintk("AdLib base: ");
      WRITE_RWA(0x63, al_base & 255);
      i = inb(0x203);

      WRITE_RWA(0x62, al_base >> 8);
      dprintk("%02X%02X (%X)\n", inb(0x203), i, al_base);

      WRITE_RWA(0x30, 1);
}

static void rwa010_soundblaster_reset(void)
{
      int i;

      outb(1, 0x226);
      udelay(3);
      outb(0, 0x226);

      for (i = 0; i < 5; i++) {
            if (inb(0x22e) & 0x80)
                  break;
            mdelay(1);
      }
      if (i == 5)
            printk("SoundBlaster: DSP reset failed\n");

      dprintk("SoundBlaster DSP reset: %02X (AA)\n", inb(0x22a));

      for (i = 0; i < 5; i++) {
            if ((inb(0x22c) & 0x80) == 0)
                  break;
            mdelay(1);
      }

      if (i == 5)
            printk("SoundBlaster: DSP not ready\n");
      else {
            outb(0xe1, 0x22c);

            dprintk("SoundBlaster DSP id: ");
            i = inb(0x22a);
            udelay(1);
            i |= inb(0x22a) << 8;
            dprintk("%04X\n", i);

            for (i = 0; i < 5; i++) {
                  if ((inb(0x22c) & 0x80) == 0)
                        break;
                  mdelay(1);
            }

            if (i == 5)
                  printk("SoundBlaster: could not turn speaker off\n");

            outb(0xd3, 0x22c);
      }

      /* turn on OPL3 */
      outb(5, 0x38a);
      outb(1, 0x38b);
}

static void __init rwa010_init(void)
{
      rwa010_unlock();
      rwa010_read_ident();
      rwa010_global_init();
      rwa010_game_port_init();
      rwa010_waveartist_init(0x250, 3, 7);
      rwa010_soundblaster_init(0x220, 0x388, 3, 1);
      rwa010_soundblaster_reset();
}

EXPORT_SYMBOL(gpio_lock);
EXPORT_SYMBOL(gpio_modify_op);
EXPORT_SYMBOL(gpio_modify_io);
EXPORT_SYMBOL(cpld_modify);
EXPORT_SYMBOL(gpio_read);

/*
 * Initialise any other hardware after we've got the PCI bus
 * initialised.  We may need the PCI bus to talk to this other
 * hardware.
 */
static int __init nw_hw_init(void)
{
      if (machine_is_netwinder()) {
            unsigned long flags;

            wb977_init();
            cpld_init();
            rwa010_init();

            spin_lock_irqsave(&gpio_lock, flags);
            gpio_modify_op(GPIO_RED_LED|GPIO_GREEN_LED, DEFAULT_LEDS);
            spin_unlock_irqrestore(&gpio_lock, flags);
      }
      return 0;
}

__initcall(nw_hw_init);

/*
 * Older NeTTroms either do not provide a parameters
 * page, or they don't supply correct information in
 * the parameter page.
 */
static void __init
fixup_netwinder(struct machine_desc *desc, struct tag *tags,
            char **cmdline, struct meminfo *mi)
{
#ifdef CONFIG_ISAPNP
      extern int isapnp_disable;

      /*
       * We must not use the kernels ISAPnP code
       * on the NetWinder - it will reset the settings
       * for the WaveArtist chip and render it inoperable.
       */
      isapnp_disable = 1;
#endif
}

MACHINE_START(NETWINDER, "Rebel-NetWinder")
      /* Maintainer: Russell King/Rebel.com */
      .phys_io    = DC21285_ARMCSR_BASE,
      .io_pg_offst      = ((0xfe000000) >> 18) & 0xfffc,
      .boot_params      = 0x00000100,
      .video_start      = 0x000a0000,
      .video_end  = 0x000bffff,
      .reserve_lp0      = 1,
      .reserve_lp2      = 1,
      .fixup            = fixup_netwinder,
      .map_io           = footbridge_map_io,
      .init_irq   = footbridge_init_irq,
      .timer            = &isa_timer,
MACHINE_END

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