arch/v850/kernel/ma.c

   1 /*
   2  * arch/v850/kernel/ma.c -- V850E/MA series of cpu chips
   3  *
   4  *  Copyright (C) 2001,02,03  NEC Electronics Corporation
   5  *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General
   8  * Public License.  See the file COPYING in the main directory of this
   9  * archive for more details.
  10  *
  11  * Written by Miles Bader <miles@gnu.org>
  12  */
  13
  14 #include <linux/config.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/mm.h>
  18 #include <linux/swap.h>
  19 #include <linux/bootmem.h>
  20 #include <linux/irq.h>
  21
  22 #include <asm/atomic.h>
  23 #include <asm/page.h>
  24 #include <asm/machdep.h>
  25 #include <asm/v850e_timer_d.h>
  26
  27 #include "mach.h"
  28
  29 void __init mach_sched_init (struct irqaction *timer_action)
  30 {
  31         /* Start hardware timer.  */
  32         v850e_timer_d_configure (0, HZ);
  33         /* Install timer interrupt handler.  */
  34         setup_irq (IRQ_INTCMD(0), timer_action);
  35 }
  36
  37 static struct v850e_intc_irq_init irq_inits[] = {
  38         { "IRQ", 0,             NUM_MACH_IRQS,  1, 7 },
  39         { "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM, 1, 5 },
  40         { "DMA", IRQ_INTDMA(0), IRQ_INTDMA_NUM, 1, 2 },
  41         { "CSI", IRQ_INTCSI(0), IRQ_INTCSI_NUM, 4, 4 },
  42         { "SER", IRQ_INTSER(0), IRQ_INTSER_NUM, 4, 3 },
  43         { "SR",  IRQ_INTSR(0),  IRQ_INTSR_NUM,  4, 4 },
  44         { "ST",  IRQ_INTST(0),  IRQ_INTST_NUM,  4, 5 },
  45         { 0 }
  46 };
  47 #define NUM_IRQ_INITS ((sizeof irq_inits / sizeof irq_inits[0]) - 1)
  48
  49 static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS];
  50
  51 /* Initialize MA chip interrupts.  */
  52 void __init ma_init_irqs (void)
  53 {
  54         v850e_intc_init_irq_types (irq_inits, hw_itypes);
  55 }
  56
  57 /* Called before configuring an on-chip UART.  */
  58 void ma_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud)
  59 {
  60         /* We only know about the first two UART channels (though
  61            specific chips may have more).  */
  62         if (chan < 2) {
  63                 unsigned bits = 0x3 << (chan * 3);
  64                 /* Specify that the relevant pins on the chip should do
  65                    serial I/O, not direct I/O.  */
  66                 MA_PORT4_PMC |= bits;
  67                 /* Specify that we're using the UART, not the CSI device.  */
  68                 MA_PORT4_PFC |= bits;
  69         }
  70 }