diff options
Diffstat (limited to 'arch/v850/kernel/ma.c')
| -rw-r--r-- | arch/v850/kernel/ma.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/v850/kernel/ma.c b/arch/v850/kernel/ma.c new file mode 100644 index 000000000000..b3dfbc5d2f40 --- /dev/null +++ b/arch/v850/kernel/ma.c @@ -0,0 +1,70 @@ +/* + * 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/config.h> +#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 ((sizeof irq_inits / sizeof irq_inits[0]) - 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; + } +} |