+++ /dev/null
-/*
- * arch/v850/kernel/as85ep1.c -- AS85EP1 V850E evaluation chip/board
- *
- * Copyright (C) 2002,03 NEC Electronics Corporation
- * Copyright (C) 2002,03 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/module.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/major.h>
-#include <linux/irq.h>
-
-#include <asm/machdep.h>
-#include <asm/atomic.h>
-#include <asm/page.h>
-#include <asm/v850e_timer_d.h>
-#include <asm/v850e_uart.h>
-
-#include "mach.h"
-
-
-/* SRAM and SDRAM are vaguely contiguous (with a big hole in between; see
- mach_reserve_bootmem for details); use both as one big area. */
-#define RAM_START SRAM_ADDR
-#define RAM_END (SDRAM_ADDR + SDRAM_SIZE)
-
-/* The bits of this port are connected to an 8-LED bar-graph. */
-#define LEDS_PORT 4
-
-
-static void as85ep1_led_tick (void);
-
-extern char _intv_copy_src_start, _intv_copy_src_end;
-extern char _intv_copy_dst_start;
-
-
-void __init mach_early_init (void)
-{
-#ifndef CONFIG_ROM_KERNEL
- const u32 *src;
- register u32 *dst asm ("ep");
-#endif
-
- AS85EP1_CSC(0) = 0x0403;
- AS85EP1_BCT(0) = 0xB8B8;
- AS85EP1_DWC(0) = 0x0104;
- AS85EP1_BCC = 0x0012;
- AS85EP1_ASC = 0;
- AS85EP1_LBS = 0x00A9;
-
- AS85EP1_PORT_PMC(6) = 0xFF; /* valid A0,A1,A20-A25 */
- AS85EP1_PORT_PMC(7) = 0x0E; /* valid CS1-CS3 */
- AS85EP1_PORT_PMC(9) = 0xFF; /* valid D16-D23 */
- AS85EP1_PORT_PMC(10) = 0xFF; /* valid D24-D31 */
-
- AS85EP1_RFS(1) = 0x800c;
- AS85EP1_RFS(3) = 0x800c;
- AS85EP1_SCR(1) = 0x20A9;
- AS85EP1_SCR(3) = 0x20A9;
-
-#ifndef CONFIG_ROM_KERNEL
- /* The early chip we have is buggy, and writing the interrupt
- vectors into low RAM may screw up, so for non-ROM kernels, we
- only rely on the reset vector being downloaded, and copy the
- rest of the interrupt vectors into place here. The specific bug
- is that writing address N, where (N & 0x10) == 0x10, will _also_
- write to address (N - 0x10). We avoid this (effectively) by
- writing in 16-byte chunks backwards from the end. */
-
- AS85EP1_IRAMM = 0x3; /* "write-mode" for the internal instruction memory */
-
- src = (u32 *)(((u32)&_intv_copy_src_end - 1) & ~0xF);
- dst = (u32 *)&_intv_copy_dst_start
- + (src - (u32 *)&_intv_copy_src_start);
- do {
- u32 t0 = src[0], t1 = src[1], t2 = src[2], t3 = src[3];
- dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3;
- dst -= 4;
- src -= 4;
- } while (src > (u32 *)&_intv_copy_src_start);
-
- AS85EP1_IRAMM = 0x0; /* "read-mode" for the internal instruction memory */
-#endif /* !CONFIG_ROM_KERNEL */
-
- v850e_intc_disable_irqs ();
-}
-
-void __init mach_setup (char **cmdline)
-{
- AS85EP1_PORT_PMC (LEDS_PORT) = 0; /* Make the LEDs port an I/O port. */
- AS85EP1_PORT_PM (LEDS_PORT) = 0; /* Make all the bits output pins. */
- mach_tick = as85ep1_led_tick;
-}
-
-void __init mach_get_physical_ram (unsigned long *ram_start,
- unsigned long *ram_len)
-{
- *ram_start = RAM_START;
- *ram_len = RAM_END - RAM_START;
-}
-
-/* Convenience macros. */
-#define SRAM_END (SRAM_ADDR + SRAM_SIZE)
-#define SDRAM_END (SDRAM_ADDR + SDRAM_SIZE)
-
-void __init mach_reserve_bootmem ()
-{
- if (SDRAM_ADDR < RAM_END && SDRAM_ADDR > RAM_START)
- /* We can't use the space between SRAM and SDRAM, so
- prevent the kernel from trying. */
- reserve_bootmem(SRAM_END, SDRAM_ADDR - SRAM_END,
- BOOTMEM_DEFAULT);
-}
-
-void mach_gettimeofday (struct timespec *tv)
-{
- tv->tv_sec = 0;
- tv->tv_nsec = 0;
-}
-
-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 },
- { "CCC", IRQ_INTCCC(0), IRQ_INTCCC_NUM, 1, 5 },
- { "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM, 1, 5 },
- { "SRE", IRQ_INTSRE(0), IRQ_INTSRE_NUM, 3, 3 },
- { "SR", IRQ_INTSR(0), IRQ_INTSR_NUM, 3, 4 },
- { "ST", IRQ_INTST(0), IRQ_INTST_NUM, 3, 5 },
- { 0 }
-};
-#define NUM_IRQ_INITS (ARRAY_SIZE(irq_inits) - 1)
-
-static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS];
-
-void __init mach_init_irqs (void)
-{
- v850e_intc_init_irq_types (irq_inits, hw_itypes);
-}
-
-void machine_restart (char *__unused)
-{
-#ifdef CONFIG_RESET_GUARD
- disable_reset_guard ();
-#endif
- asm ("jmp r0"); /* Jump to the reset vector. */
-}
-
-void machine_halt (void)
-{
-#ifdef CONFIG_RESET_GUARD
- disable_reset_guard ();
-#endif
- local_irq_disable (); /* Ignore all interrupts. */
- AS85EP1_PORT_IO (LEDS_PORT) = 0xAA; /* Note that we halted. */
- for (;;)
- asm ("halt; nop; nop; nop; nop; nop");
-}
-
-void machine_power_off (void)
-{
- machine_halt ();
-}
-
-/* Called before configuring an on-chip UART. */
-void as85ep1_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud)
-{
- /* Make the shared uart/port pins be uart pins. */
- AS85EP1_PORT_PMC(3) |= (0x5 << chan);
-
- /* The AS85EP1 connects some general-purpose I/O pins on the CPU to
- the RTS/CTS lines of UART 1's serial connection. I/O pins P53
- and P54 are RTS and CTS respectively. */
- if (chan == 1) {
- /* Put P53 & P54 in I/O port mode. */
- AS85EP1_PORT_PMC(5) &= ~0x18;
- /* Make P53 an output, and P54 an input. */
- AS85EP1_PORT_PM(5) |= 0x10;
- }
-}
-
-/* Minimum and maximum bounds for the moving upper LED boundary in the
- clock tick display. */
-#define MIN_MAX_POS 0
-#define MAX_MAX_POS 7
-
-/* There are MAX_MAX_POS^2 - MIN_MAX_POS^2 cycles in the animation, so if
- we pick 6 and 0 as above, we get 49 cycles, which is when divided into
- the standard 100 value for HZ, gives us an almost 1s total time. */
-#define TICKS_PER_FRAME \
- (HZ / (MAX_MAX_POS * MAX_MAX_POS - MIN_MAX_POS * MIN_MAX_POS))
-
-static void as85ep1_led_tick ()
-{
- static unsigned counter = 0;
-
- if (++counter == TICKS_PER_FRAME) {
- static int pos = 0, max_pos = MAX_MAX_POS, dir = 1;
-
- if (dir > 0 && pos == max_pos) {
- dir = -1;
- if (max_pos == MIN_MAX_POS)
- max_pos = MAX_MAX_POS;
- else
- max_pos--;
- } else {
- if (dir < 0 && pos == 0)
- dir = 1;
-
- if (pos + dir <= max_pos) {
- /* Each bit of port 0 has a LED. */
- set_bit (pos, &AS85EP1_PORT_IO(LEDS_PORT));
- pos += dir;
- clear_bit (pos, &AS85EP1_PORT_IO(LEDS_PORT));
- }
- }
-
- counter = 0;
- }
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff