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setup.c

/*
 *
 * 2.6 port, Embedded Alley Solutions, Inc
 *
 *  Based on Per Hallsmark, per.hallsmark@mvista.com
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  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.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/serial_pnx8xxx.h>
#include <linux/pm.h>

#include <asm/cpu.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/mipsregs.h>
#include <asm/reboot.h>
#include <asm/pgtable.h>
#include <asm/time.h>

#include <glb.h>
#include <int.h>
#include <pci.h>
#include <uart.h>
#include <nand.h>

extern void __init board_setup(void);
extern void pnx8550_machine_restart(char *);
extern void pnx8550_machine_halt(void);
extern void pnx8550_machine_power_off(void);
extern struct resource ioport_resource;
extern struct resource iomem_resource;
extern char *prom_getcmdline(void);

struct resource standard_io_resources[] = {
      {
            .start      = 0x00,
            .end  = 0x1f,
            .name = "dma1",
            .flags      = IORESOURCE_BUSY
      }, {
            .start      = 0x40,
            .end  = 0x5f,
            .name = "timer",
            .flags      = IORESOURCE_BUSY
      }, {
            .start      = 0x80,
            .end  = 0x8f,
            .name = "dma page reg",
            .flags      = IORESOURCE_BUSY
      }, {
            .start      = 0xc0,
            .end  = 0xdf,
            .name = "dma2",
            .flags      = IORESOURCE_BUSY
      },
};

#define STANDARD_IO_RESOURCES ARRAY_SIZE(standard_io_resources)

extern struct resource pci_io_resource;
extern struct resource pci_mem_resource;

/* Return the total size of DRAM-memory, (RANK0 + RANK1) */
unsigned long get_system_mem_size(void)
{
      /* Read IP2031_RANK0_ADDR_LO */
      unsigned long dram_r0_lo = inl(PCI_BASE | 0x65010);
      /* Read IP2031_RANK1_ADDR_HI */
      unsigned long dram_r1_hi = inl(PCI_BASE | 0x65018);

      return dram_r1_hi - dram_r0_lo + 1;
}

int pnx8550_console_port = -1;

void __init plat_mem_setup(void)
{
      int i;
      char* argptr;

      board_setup();  /* board specific setup */

        _machine_restart = pnx8550_machine_restart;
        _machine_halt = pnx8550_machine_halt;
        pm_power_off = pnx8550_machine_power_off;

      /* Clear the Global 2 Register, PCI Inta Output Enable Registers
         Bit 1:Enable DAC Powerdown
        -> 0:DACs are enabled and are working normally
           1:DACs are powerdown
         Bit 0:Enable of PCI inta output
        -> 0 = Disable PCI inta output
           1 = Enable PCI inta output
      */
      PNX8550_GLB2_ENAB_INTA_O = 0;

      /* IO/MEM resources. */
      set_io_port_base(KSEG1);
      ioport_resource.start = 0;
      ioport_resource.end = ~0;
      iomem_resource.start = 0;
      iomem_resource.end = ~0;

      /* Request I/O space for devices on this board */
      for (i = 0; i < STANDARD_IO_RESOURCES; i++)
            request_resource(&ioport_resource, standard_io_resources + i);

      /* Place the Mode Control bit for GPIO pin 16 in primary function */
      /* Pin 16 is used by UART1, UA1_TX                                */
      outl((PNX8550_GPIO_MODE_PRIMOP << PNX8550_GPIO_MC_16_BIT) |
                  (PNX8550_GPIO_MODE_PRIMOP << PNX8550_GPIO_MC_17_BIT),
                  PNX8550_GPIO_MC1);

      argptr = prom_getcmdline();
      if ((argptr = strstr(argptr, "console=ttyS")) != NULL) {
            argptr += strlen("console=ttyS");
            pnx8550_console_port = *argptr == '0' ? 0 : 1;

            /* We must initialize the UART (console) before early printk */
            /* Set LCR to 8-bit and BAUD to 38400 (no 5)                */
            ip3106_lcr(UART_BASE, pnx8550_console_port) =
                  PNX8XXX_UART_LCR_8BIT;
            ip3106_baud(UART_BASE, pnx8550_console_port) = 5;
      }

      return;
}

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