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ma.c

/*
 * arch/v850/kernel/ma.c -- V850E/MA series of cpu chips
 *
 *  Copyright (C) 2001,02,03  NEC Electronics Corporation
 *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of this
 * archive for more details.
 *
 * Written by Miles Bader <miles@gnu.org>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/bootmem.h>
#include <linux/irq.h>

#include <asm/atomic.h>
#include <asm/page.h>
#include <asm/machdep.h>
#include <asm/v850e_timer_d.h>

#include "mach.h"

void __init mach_sched_init (struct irqaction *timer_action)
{
      /* Start hardware timer.  */
      v850e_timer_d_configure (0, HZ);
      /* Install timer interrupt handler.  */
      setup_irq (IRQ_INTCMD(0), timer_action);
}

static struct v850e_intc_irq_init irq_inits[] = {
      { "IRQ", 0,             NUM_MACH_IRQS,    1, 7 },
      { "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM,   1, 5 },
      { "DMA", IRQ_INTDMA(0), IRQ_INTDMA_NUM,   1, 2 },
      { "CSI", IRQ_INTCSI(0), IRQ_INTCSI_NUM,   4, 4 },
      { "SER", IRQ_INTSER(0), IRQ_INTSER_NUM,   4, 3 },
      { "SR",      IRQ_INTSR(0),    IRQ_INTSR_NUM,    4, 4 },
      { "ST",  IRQ_INTST(0),  IRQ_INTST_NUM,    4, 5 },
      { 0 }
};
#define NUM_IRQ_INITS (ARRAY_SIZE(irq_inits) - 1)

static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS];

/* Initialize MA chip interrupts.  */
void __init ma_init_irqs (void)
{
      v850e_intc_init_irq_types (irq_inits, hw_itypes);
}

/* Called before configuring an on-chip UART.  */
void ma_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud)
{
      /* We only know about the first two UART channels (though
         specific chips may have more).  */
      if (chan < 2) {
            unsigned bits = 0x3 << (chan * 3);
            /* Specify that the relevant pins on the chip should do
               serial I/O, not direct I/O.  */
            MA_PORT4_PMC |= bits;
            /* Specify that we're using the UART, not the CSI device.  */
            MA_PORT4_PFC |= bits;
      }
}

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