arch/v850/kernel/me2.c

   1 /*
   2  * arch/v850/kernel/me2.c -- V850E/ME2 chip-specific support
   3  *
   4  *  Copyright (C) 2003  NEC Corporation
   5  *  Copyright (C) 2003  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/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/mm.h>
  17 #include <linux/swap.h>
  18 #include <linux/bootmem.h>
  19 #include <linux/irq.h>
  20
  21 #include <asm/atomic.h>
  22 #include <asm/page.h>
  23 #include <asm/machdep.h>
  24 #include <asm/v850e_timer_d.h>
  25
  26 #include "mach.h"
  27
  28 void __init mach_sched_init (struct irqaction *timer_action)
  29 {
  30         /* Start hardware timer.  */
  31         v850e_timer_d_configure (0, HZ);
  32         /* Install timer interrupt handler.  */
  33         setup_irq (IRQ_INTCMD(0), timer_action);
  34 }
  35
  36 static struct v850e_intc_irq_init irq_inits[] = {
  37         { "IRQ",    0,                NUM_CPU_IRQS,      1, 7 },
  38         { "INTP",   IRQ_INTP(0),      IRQ_INTP_NUM,      1, 5 },
  39         { "CMD",    IRQ_INTCMD(0),    IRQ_INTCMD_NUM,    1, 3 },
  40         { "UBTIRE", IRQ_INTUBTIRE(0), IRQ_INTUBTIRE_NUM, 5, 4 },
  41         { "UBTIR",  IRQ_INTUBTIR(0),  IRQ_INTUBTIR_NUM,  5, 4 },
  42         { "UBTIT",  IRQ_INTUBTIT(0),  IRQ_INTUBTIT_NUM,  5, 4 },
  43         { "UBTIF",  IRQ_INTUBTIF(0),  IRQ_INTUBTIF_NUM,  5, 4 },
  44         { "UBTITO", IRQ_INTUBTITO(0), IRQ_INTUBTITO_NUM, 5, 4 },
  45         { 0 }
  46 };
  47 #define NUM_IRQ_INITS (ARRAY_SIZE(irq_inits) - 1)
  48
  49 static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS];
  50
  51 /* Initialize V850E/ME2 chip interrupts.  */
  52 void __init me2_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 me2_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud)
  59 {
  60         if (chan == 0) {
  61                 /* Specify that the relevant pins on the chip should do
  62                    serial I/O, not direct I/O.  */
  63                 ME2_PORT1_PMC |= 0xC;
  64                 /* Specify that we're using the UART, not the CSI device. */
  65                 ME2_PORT1_PFC |= 0xC;
  66         } else if (chan == 1) {
  67                 /* Specify that the relevant pins on the chip should do
  68                    serial I/O, not direct I/O.  */
  69                 ME2_PORT2_PMC |= 0x6;
  70                 /* Specify that we're using the UART, not the CSI device. */
  71                 ME2_PORT2_PFC |= 0x6;
  72         }
  73 }