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/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 28void __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 36static struct v850e_intc_irq_init irq_inits[] = { 37 { "IRQ", 0, NUM_MACH_IRQS, 1, 7 }, 38 { "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM, 1, 5 }, 39 { "DMA", IRQ_INTDMA(0), IRQ_INTDMA_NUM, 1, 2 }, 40 { "CSI", IRQ_INTCSI(0), IRQ_INTCSI_NUM, 4, 4 }, 41 { "SER", IRQ_INTSER(0), IRQ_INTSER_NUM, 4, 3 }, 42 { "SR", IRQ_INTSR(0), IRQ_INTSR_NUM, 4, 4 }, 43 { "ST", IRQ_INTST(0), IRQ_INTST_NUM, 4, 5 }, 44 { 0 } 45}; 46#define NUM_IRQ_INITS (ARRAY_SIZE(irq_inits) - 1) 47 48static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS]; 49 50/* Initialize MA chip interrupts. */ 51void __init ma_init_irqs (void) 52{ 53 v850e_intc_init_irq_types (irq_inits, hw_itypes); 54} 55 56/* Called before configuring an on-chip UART. */ 57void ma_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud) 58{ 59 /* We only know about the first two UART channels (though 60 specific chips may have more). */ 61 if (chan < 2) { 62 unsigned bits = 0x3 << (chan * 3); 63 /* Specify that the relevant pins on the chip should do 64 serial I/O, not direct I/O. */ 65 MA_PORT4_PMC |= bits; 66 /* Specify that we're using the UART, not the CSI device. */ 67 MA_PORT4_PFC |= bits; 68 } 69} 70