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taishan.c

/*
 * arch/ppc/platforms/4xx/taishan.c
 *
 * AMCC Taishan board specific routines
 *
 * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de>
 *
 * 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.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/types.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/initrd.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/ndfc.h>
#include <linux/mtd/physmap.h>

#include <asm/machdep.h>
#include <asm/ocp.h>
#include <asm/bootinfo.h>
#include <asm/ppcboot.h>

#include <syslib/gen550.h>
#include <syslib/ibm440gx_common.h>

extern bd_t __res;

static struct ibm44x_clocks clocks __initdata;

/*
 * NOR FLASH configuration (using mtd physmap driver)
 */

/* start will be added dynamically, end is always fixed */
static struct resource taishan_nor_resource = {
      .start = TAISHAN_FLASH_ADDR,
      .end   = 0x1ffffffffULL,
      .flags = IORESOURCE_MEM,
};

#define RW_PART0_OF     0
#define RW_PART0_SZ     0x180000
#define RW_PART1_SZ     0x200000
/* Partition 2 will be autosized dynamically... */
#define RW_PART3_SZ     0x80000
#define RW_PART4_SZ     0x40000

static struct mtd_partition taishan_nor_parts[] = {
      {
            .name = "kernel",
            .offset = 0,
            .size = RW_PART0_SZ
      },
      {
            .name = "root",
            .offset = MTDPART_OFS_APPEND,
            .size = RW_PART1_SZ,
      },
      {
            .name = "user",
            .offset = MTDPART_OFS_APPEND,
/*          .size = RW_PART2_SZ */ /* will be adjusted dynamically */
      },
      {
            .name = "env",
            .offset = MTDPART_OFS_APPEND,
            .size = RW_PART3_SZ,
      },
      {
            .name = "u-boot",
            .offset = MTDPART_OFS_APPEND,
            .size = RW_PART4_SZ,
      }
};

static struct physmap_flash_data taishan_nor_data = {
      .width            = 4,
      .parts            = taishan_nor_parts,
      .nr_parts   = ARRAY_SIZE(taishan_nor_parts),
};

static struct platform_device taishan_nor_device = {
      .name       = "physmap-flash",
      .id         = 0,
      .dev = {
                  .platform_data = &taishan_nor_data,
            },
      .num_resources    = 1,
      .resource   = &taishan_nor_resource,
};

static int taishan_setup_flash(void)
{
      /*
       * Adjust partition 2 to flash size
       */
      taishan_nor_parts[2].size = __res.bi_flashsize -
            RW_PART0_SZ - RW_PART1_SZ - RW_PART3_SZ - RW_PART4_SZ;

      platform_device_register(&taishan_nor_device);

      return 0;
}
arch_initcall(taishan_setup_flash);

static void __init
taishan_calibrate_decr(void)
{
      unsigned int freq;

      if (mfspr(SPRN_CCR1) & CCR1_TCS)
            freq = TAISHAN_TMR_CLK;
      else
            freq = clocks.cpu;

      ibm44x_calibrate_decr(freq);
}

static int
taishan_show_cpuinfo(struct seq_file *m)
{
      seq_printf(m, "vendor\t\t: AMCC\n");
      seq_printf(m, "machine\t\t: PPC440GX EVB (Taishan)\n");
      ibm440gx_show_cpuinfo(m);
      return 0;
}

static inline int
taishan_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
      static char pci_irq_table[][4] =
      /*
       *    PCI IDSEL/INTPIN->INTLINE
       *       A   B   C   D
       */
      {
            { 23, 24, 25, 26 },     /* IDSEL 1 - PCI Slot 0 */
            { 24, 25, 26, 23 },     /* IDSEL 2 - PCI Slot 1 */
      };

      const long min_idsel = 1, max_idsel = 2, irqs_per_slot = 4;
      return PCI_IRQ_TABLE_LOOKUP;
}

static void __init taishan_set_emacdata(void)
{
      struct ocp_def *def;
      struct ocp_func_emac_data *emacdata;
      int i;

      /* Set phy_map, phy_mode, and mac_addr for each EMAC */
      for (i=2; i<4; i++) {
            def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, i);
            emacdata = def->additions;
            if (i < 2) {
                  emacdata->phy_map = 0x00000001;     /* Skip 0x00 */
                  emacdata->phy_mode = PHY_MODE_SMII;
            } else {
                  emacdata->phy_map = 0x00000001; /* Skip 0x00 */
                  emacdata->phy_mode = PHY_MODE_RGMII;
            }
            if (i == 0)
                  memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
            else if (i == 1)
                  memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
            else if (i == 2)
                  memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
            else if (i == 3)
                  memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
      }
}

#define PCIX_READW(offset) \
      (readw(pcix_reg_base+offset))

#define PCIX_WRITEW(value, offset) \
      (writew(value, pcix_reg_base+offset))

#define PCIX_WRITEL(value, offset) \
      (writel(value, pcix_reg_base+offset))

/*
 * FIXME: This is only here to "make it work".  This will move
 * to a ibm_pcix.c which will contain a generic IBM PCIX bridge
 * configuration library. -Matt
 */
static void __init
taishan_setup_pcix(void)
{
      void *pcix_reg_base;

      pcix_reg_base = ioremap64(PCIX0_REG_BASE, PCIX_REG_SIZE);

      /* Enable PCIX0 I/O, Mem, and Busmaster cycles */
      PCIX_WRITEW(PCIX_READW(PCIX0_COMMAND) | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER, PCIX0_COMMAND);

      /* Disable all windows */
      PCIX_WRITEL(0, PCIX0_POM0SA);
      PCIX_WRITEL(0, PCIX0_POM1SA);
      PCIX_WRITEL(0, PCIX0_POM2SA);
      PCIX_WRITEL(0, PCIX0_PIM0SA);
      PCIX_WRITEL(0, PCIX0_PIM0SAH);
      PCIX_WRITEL(0, PCIX0_PIM1SA);
      PCIX_WRITEL(0, PCIX0_PIM2SA);
      PCIX_WRITEL(0, PCIX0_PIM2SAH);

      /* Setup 2GB PLB->PCI outbound mem window (3_8000_0000->0_8000_0000) */
      PCIX_WRITEL(0x00000003, PCIX0_POM0LAH);
      PCIX_WRITEL(0x80000000, PCIX0_POM0LAL);
      PCIX_WRITEL(0x00000000, PCIX0_POM0PCIAH);
      PCIX_WRITEL(0x80000000, PCIX0_POM0PCIAL);
      PCIX_WRITEL(0x80000001, PCIX0_POM0SA);

      /* Setup 2GB PCI->PLB inbound memory window at 0, enable MSIs */
      PCIX_WRITEL(0x00000000, PCIX0_PIM0LAH);
      PCIX_WRITEL(0x00000000, PCIX0_PIM0LAL);
      PCIX_WRITEL(0x80000007, PCIX0_PIM0SA);
      PCIX_WRITEL(0xffffffff, PCIX0_PIM0SAH);

      iounmap(pcix_reg_base);

      eieio();
}

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

      /* Configure windows on the PCI-X host bridge */
      taishan_setup_pcix();

      hose = pcibios_alloc_controller();

      if (!hose)
            return;

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

      hose->pci_mem_offset = TAISHAN_PCI_MEM_OFFSET;

      pci_init_resource(&hose->io_resource,
                  TAISHAN_PCI_LOWER_IO,
                  TAISHAN_PCI_UPPER_IO,
                  IORESOURCE_IO,
                  "PCI host bridge");

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

      hose->io_space.start = TAISHAN_PCI_LOWER_IO;
      hose->io_space.end = TAISHAN_PCI_UPPER_IO;
      hose->mem_space.start = TAISHAN_PCI_LOWER_MEM;
      hose->mem_space.end = TAISHAN_PCI_UPPER_MEM;
      hose->io_base_virt = ioremap64(TAISHAN_PCI_IO_BASE, TAISHAN_PCI_IO_SIZE);
      isa_io_base = (unsigned long) hose->io_base_virt;

      setup_indirect_pci(hose,
                  TAISHAN_PCI_CFGA_PLB32,
                  TAISHAN_PCI_CFGD_PLB32);
      hose->set_cfg_type = 1;

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

      ppc_md.pci_swizzle = common_swizzle;
      ppc_md.pci_map_irq = taishan_map_irq;
}


static void __init
taishan_early_serial_map(void)
{
      struct uart_port port;

      /* Setup ioremapped serial port access */
      memset(&port, 0, sizeof(port));
      port.membase = ioremap64(PPC440GX_UART0_ADDR, 8);
      port.irq = UART0_INT;
      port.uartclk = clocks.uart0;
      port.regshift = 0;
      port.iotype = UPIO_MEM;
      port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
      port.line = 0;

      if (early_serial_setup(&port) != 0)
            printk("Early serial init of port 0 failed\n");

#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
      /* Configure debug serial access */
      gen550_init(0, &port);

      /* Purge TLB entry added in head_44x.S for early serial access */
      _tlbie(UART0_IO_BASE, 0);
#endif

      port.membase = ioremap64(PPC440GX_UART1_ADDR, 8);
      port.irq = UART1_INT;
      port.uartclk = clocks.uart1;
      port.line = 1;

      if (early_serial_setup(&port) != 0)
            printk("Early serial init of port 1 failed\n");

#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
      /* Configure debug serial access */
      gen550_init(1, &port);
#endif
}

static void __init
taishan_setup_arch(void)
{
      taishan_set_emacdata();

      ibm440gx_tah_enable();

      /*
       * Determine various clocks.
       * To be completely correct we should get SysClk
       * from FPGA, because it can be changed by on-board switches
       * --ebs
       */
      ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
      ocp_sys_info.opb_bus_freq = clocks.opb;

      /* init to some ~sane value until calibrate_delay() runs */
        loops_per_jiffy = 50000000/HZ;

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

#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_HDA1;
#endif

      taishan_early_serial_map();

      /* Identify the system */
      printk("AMCC PowerPC 440GX Taishan Platform\n");
}

static void __init taishan_init(void)
{
      ibm440gx_l2c_setup(&clocks);
}

void __init platform_init(unsigned long r3, unsigned long r4,
            unsigned long r5, unsigned long r6, unsigned long r7)
{
      ibm44x_platform_init(r3, r4, r5, r6, r7);

      ppc_md.setup_arch = taishan_setup_arch;
      ppc_md.show_cpuinfo = taishan_show_cpuinfo;
      ppc_md.get_irq = NULL;        /* Set in ppc4xx_pic_init() */

      ppc_md.calibrate_decr = taishan_calibrate_decr;

#ifdef CONFIG_KGDB
      ppc_md.early_serial_map = taishan_early_serial_map;
#endif
      ppc_md.init = taishan_init;
}


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