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mvme5100.c

/*
 * Board setup routines for the Motorola MVME5100.
 *
 * Author: Matt Porter <mporter@mvista.com>
 *
 * 2001-2004 (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/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/kdev_t.h>
#include <linux/root_dev.h>

#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/open_pic.h>
#include <asm/i8259.h>
#include <asm/todc.h>
#include <asm/pci-bridge.h>
#include <asm/bootinfo.h>
#include <asm/hawk.h>

#include <platforms/pplus.h>
#include <platforms/mvme5100.h>

static u_char mvme5100_openpic_initsenses[16] __initdata = {
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* i8259 cascade */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* TL16C550 UART 1,2 */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet1 front panel or P2 */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Hawk Watchdog 1,2 */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* DS1621 thermal alarm */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT0# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT1# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT2# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT3# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTA#, PMC2 INTB# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTB#, PMC2 INTC# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTC#, PMC2 INTD# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTD#, PMC2 INTA# */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet 2 (front panel) */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Abort Switch */
      (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* RTC Alarm */
};

static inline int
mvme5100_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
      int irq;

      static char pci_irq_table[][4] =
      /*
       *    PCI IDSEL/INTPIN->INTLINE
       *       A   B   C   D
       */
      {
            {  0,  0,  0,  0 },     /* IDSEL 11 - Winbond */
            {  0,  0,  0,  0 },     /* IDSEL 12 - unused */
            { 21, 22, 23, 24 },     /* IDSEL 13 - Universe II */
            { 18,  0,  0,  0 },     /* IDSEL 14 - Enet 1 */
            {  0,  0,  0,  0 },     /* IDSEL 15 - unused */
            { 25, 26, 27, 28 },     /* IDSEL 16 - PMC Slot 1 */
            { 28, 25, 26, 27 },     /* IDSEL 17 - PMC Slot 2 */
            {  0,  0,  0,  0 },     /* IDSEL 18 - unused */
            { 29,  0,  0,  0 },     /* IDSEL 19 - Enet 2 */
            {  0,  0,  0,  0 },     /* IDSEL 20 - PMCSPAN */
      };

      const long min_idsel = 11, max_idsel = 20, irqs_per_slot = 4;
      irq = PCI_IRQ_TABLE_LOOKUP;
      /* If lookup is zero, always return 0 */
      if (!irq)
            return 0;
      else
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
      /* If IPMC761 present, return table value */
      return irq;
#else
      /* If IPMC761 not present, we don't have an i8259 so adjust */
      return (irq - NUM_8259_INTERRUPTS);
#endif
}

static void
mvme5100_pcibios_fixup_resources(struct pci_dev *dev)
{
      int i;

      if ((dev->vendor == PCI_VENDOR_ID_MOTOROLA) &&
                  (dev->device == PCI_DEVICE_ID_MOTOROLA_HAWK))
            for (i=0; i<DEVICE_COUNT_RESOURCE; i++)
            {
                  dev->resource[i].start = 0;
                  dev->resource[i].end = 0;
            }
}

static void __init
mvme5100_setup_bridge(void)
{
      struct pci_controller*  hose;

      hose = pcibios_alloc_controller();

      if (!hose)
            return;

      hose->first_busno = 0;
      hose->last_busno = 0xff;
      hose->pci_mem_offset = MVME5100_PCI_MEM_OFFSET;

      pci_init_resource(&hose->io_resource, MVME5100_PCI_LOWER_IO,
                  MVME5100_PCI_UPPER_IO, IORESOURCE_IO,
                  "PCI host bridge");

      pci_init_resource(&hose->mem_resources[0], MVME5100_PCI_LOWER_MEM,
                  MVME5100_PCI_UPPER_MEM, IORESOURCE_MEM,
                  "PCI host bridge");

      hose->io_space.start = MVME5100_PCI_LOWER_IO;
      hose->io_space.end = MVME5100_PCI_UPPER_IO;
      hose->mem_space.start = MVME5100_PCI_LOWER_MEM;
      hose->mem_space.end = MVME5100_PCI_UPPER_MEM;
      hose->io_base_virt = (void *)MVME5100_ISA_IO_BASE;

      /* Use indirect method of Hawk */
      setup_indirect_pci(hose, MVME5100_PCI_CONFIG_ADDR,
                  MVME5100_PCI_CONFIG_DATA);

      hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);

      ppc_md.pcibios_fixup_resources = mvme5100_pcibios_fixup_resources;
      ppc_md.pci_swizzle = common_swizzle;
      ppc_md.pci_map_irq = mvme5100_map_irq;
}

static void __init
mvme5100_setup_arch(void)
{
      if ( ppc_md.progress )
            ppc_md.progress("mvme5100_setup_arch: enter", 0);

      loops_per_jiffy = 50000000 / HZ;

#ifdef CONFIG_BLK_DEV_INITRD
      if (initrd_start)
            ROOT_DEV = Root_RAM0;
      else
#endif
#ifdef      CONFIG_ROOT_NFS
            ROOT_DEV = Root_NFS;
#else
            ROOT_DEV = Root_SDA2;
#endif

      if ( ppc_md.progress )
            ppc_md.progress("mvme5100_setup_arch: find_bridges", 0);

      /* Setup PCI host bridge */
      mvme5100_setup_bridge();

      /* Find and map our OpenPIC */
      hawk_mpic_init(MVME5100_PCI_MEM_OFFSET);
      OpenPIC_InitSenses = mvme5100_openpic_initsenses;
      OpenPIC_NumInitSenses = sizeof(mvme5100_openpic_initsenses);

      printk("MVME5100 port (C) 2001 MontaVista Software, Inc. (source@mvista.com)\n");

      if ( ppc_md.progress )
            ppc_md.progress("mvme5100_setup_arch: exit", 0);

      return;
}

static void __init
mvme5100_init2(void)
{
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
            request_region(0x00,0x20,"dma1");
            request_region(0x20,0x20,"pic1");
            request_region(0x40,0x20,"timer");
            request_region(0x80,0x10,"dma page reg");
            request_region(0xa0,0x20,"pic2");
            request_region(0xc0,0x20,"dma2");
#endif
      return;
}

/*
 * Interrupt setup and service.
 * Have MPIC on HAWK and cascaded 8259s on Winbond cascaded to MPIC.
 */
static void __init
mvme5100_init_IRQ(void)
{
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
      int i;
#endif

      if ( ppc_md.progress )
            ppc_md.progress("init_irq: enter", 0);

      openpic_set_sources(0, 16, OpenPIC_Addr + 0x10000);
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
      openpic_init(NUM_8259_INTERRUPTS);
      openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
                  &i8259_irq);

      i8259_init(0, 0);
#else
      openpic_init(0);
#endif

      if ( ppc_md.progress )
            ppc_md.progress("init_irq: exit", 0);

      return;
}

/*
 * Set BAT 3 to map 0xf0000000 to end of physical memory space.
 */
static __inline__ void
mvme5100_set_bat(void)
{
      mb();
      mtspr(SPRN_DBAT1U, 0xf0001ffe);
      mtspr(SPRN_DBAT1L, 0xf000002a);
      mb();
}

static unsigned long __init
mvme5100_find_end_of_memory(void)
{
      return hawk_get_mem_size(MVME5100_HAWK_SMC_BASE);
}

static void __init
mvme5100_map_io(void)
{
      io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
      ioremap_base = 0xfe000000;
}

static void
mvme5100_reset_board(void)
{
      local_irq_disable();

      /* Set exception prefix high - to the firmware */
      _nmask_and_or_msr(0, MSR_IP);

      out_8((u_char *)MVME5100_BOARD_MODRST_REG, 0x01);

      return;
}

static void
mvme5100_restart(char *cmd)
{
      volatile ulong i = 10000000;

      mvme5100_reset_board();

      while (i-- > 0);
      panic("restart failed\n");
}

static void
mvme5100_halt(void)
{
      local_irq_disable();
      while (1);
}

static void
mvme5100_power_off(void)
{
      mvme5100_halt();
}

static int
mvme5100_show_cpuinfo(struct seq_file *m)
{
      seq_printf(m, "vendor\t\t: Motorola\n");
      seq_printf(m, "machine\t\t: MVME5100\n");

      return 0;
}

TODC_ALLOC();

void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
            unsigned long r6, unsigned long r7)
{
      parse_bootinfo(find_bootinfo());
      mvme5100_set_bat();

      isa_io_base = MVME5100_ISA_IO_BASE;
      isa_mem_base = MVME5100_ISA_MEM_BASE;
      pci_dram_offset = MVME5100_PCI_DRAM_OFFSET;

      ppc_md.setup_arch = mvme5100_setup_arch;
      ppc_md.show_cpuinfo = mvme5100_show_cpuinfo;
      ppc_md.init_IRQ = mvme5100_init_IRQ;
      ppc_md.get_irq = openpic_get_irq;
      ppc_md.init = mvme5100_init2;

      ppc_md.restart = mvme5100_restart;
      ppc_md.power_off = mvme5100_power_off;
      ppc_md.halt = mvme5100_halt;

      ppc_md.find_end_of_memory = mvme5100_find_end_of_memory;
      ppc_md.setup_io_mappings = mvme5100_map_io;

      TODC_INIT(TODC_TYPE_MK48T37, MVME5100_NVRAM_AS0, MVME5100_NVRAM_AS1,
                  MVME5100_NVRAM_DATA, 8);

      ppc_md.time_init = todc_time_init;
      ppc_md.set_rtc_time = todc_set_rtc_time;
      ppc_md.get_rtc_time = todc_get_rtc_time;
      ppc_md.calibrate_decr = todc_calibrate_decr;

      ppc_md.nvram_read_val = todc_m48txx_read_val;
      ppc_md.nvram_write_val = todc_m48txx_write_val;
}

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