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Diffstat (limited to 'arch/v850/kernel/rte_cb.c')
| -rw-r--r-- | arch/v850/kernel/rte_cb.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/arch/v850/kernel/rte_cb.c b/arch/v850/kernel/rte_cb.c new file mode 100644 index 000000000000..7ba397f77aca --- /dev/null +++ b/arch/v850/kernel/rte_cb.c @@ -0,0 +1,200 @@ +/* + * include/asm-v850/rte_cb.c -- Midas lab RTE-CB series of evaluation boards + * + * 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/init.h> +#include <linux/irq.h> +#include <linux/fs.h> +#include <linux/module.h> + +#include <asm/machdep.h> +#include <asm/v850e_uart.h> + +#include "mach.h" + +static void led_tick (void); + +/* LED access routines. */ +extern unsigned read_leds (int pos, char *buf, int len); +extern unsigned write_leds (int pos, const char *buf, int len); + +#ifdef CONFIG_RTE_CB_MULTI +extern void multi_init (void); +#endif + + +void __init rte_cb_early_init (void) +{ + v850e_intc_disable_irqs (); + +#ifdef CONFIG_RTE_CB_MULTI + multi_init (); +#endif +} + +void __init mach_setup (char **cmdline) +{ +#ifdef CONFIG_RTE_MB_A_PCI + /* Probe for Mother-A, and print a message if we find it. */ + *(volatile unsigned long *)MB_A_SRAM_ADDR = 0xDEADBEEF; + if (*(volatile unsigned long *)MB_A_SRAM_ADDR == 0xDEADBEEF) { + *(volatile unsigned long *)MB_A_SRAM_ADDR = 0x12345678; + if (*(volatile unsigned long *)MB_A_SRAM_ADDR == 0x12345678) + printk (KERN_INFO + " NEC SolutionGear/Midas lab" + " RTE-MOTHER-A motherboard\n"); + } +#endif /* CONFIG_RTE_MB_A_PCI */ + + mach_tick = led_tick; +} + +void machine_restart (char *__unused) +{ +#ifdef CONFIG_RESET_GUARD + disable_reset_guard (); +#endif + asm ("jmp r0"); /* Jump to the reset vector. */ +} + +EXPORT_SYMBOL(machine_restart); + +/* This says `HALt.' in LEDese. */ +static unsigned char halt_leds_msg[] = { 0x76, 0x77, 0x38, 0xF8 }; + +void machine_halt (void) +{ +#ifdef CONFIG_RESET_GUARD + disable_reset_guard (); +#endif + + /* Ignore all interrupts. */ + local_irq_disable (); + + /* Write a little message. */ + write_leds (0, halt_leds_msg, sizeof halt_leds_msg); + + /* Really halt. */ + for (;;) + asm ("halt; nop; nop; nop; nop; nop"); +} + +EXPORT_SYMBOL(machine_halt); + +void machine_power_off (void) +{ + machine_halt (); +} + +EXPORT_SYMBOL(machine_power_off); + + +/* Animated LED display for timer tick. */ + +#define TICK_UPD_FREQ 6 +static int tick_frames[][10] = { + { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, -1 }, + { 0x63, 0x5c, -1 }, + { 0x5c, 0x00, -1 }, + { 0x63, 0x00, -1 }, + { -1 } +}; + +static void led_tick () +{ + static unsigned counter = 0; + + if (++counter == (HZ / TICK_UPD_FREQ)) { + /* Which frame we're currently displaying for each digit. */ + static unsigned frame_nums[LED_NUM_DIGITS] = { 0 }; + /* Display image. */ + static unsigned char image[LED_NUM_DIGITS] = { 0 }; + unsigned char prev_image[LED_NUM_DIGITS]; + int write_to_leds = 1; /* true if we should actually display */ + int digit; + + /* We check to see if the physical LEDs contains what we last + wrote to them; if not, we suppress display (this is so that + users can write to the LEDs, and not have their output + overwritten). As a special case, we start writing again if + all the LEDs are blank, or our display image is all zeros + (indicating that this is the initial update, when the actual + LEDs might contain random data). */ + read_leds (0, prev_image, LED_NUM_DIGITS); + for (digit = 0; digit < LED_NUM_DIGITS; digit++) + if (image[digit] != prev_image[digit] + && image[digit] && prev_image[digit]) + { + write_to_leds = 0; + break; + } + + /* Update display image. */ + for (digit = 0; + digit < LED_NUM_DIGITS && tick_frames[digit][0] >= 0; + digit++) + { + int frame = tick_frames[digit][frame_nums[digit]]; + if (frame < 0) { + image[digit] = tick_frames[digit][0]; + frame_nums[digit] = 1; + } else { + image[digit] = frame; + frame_nums[digit]++; + break; + } + } + + if (write_to_leds) + /* Write the display image to the physical LEDs. */ + write_leds (0, image, LED_NUM_DIGITS); + + counter = 0; + } +} + + +/* Mother-A interrupts. */ + +#ifdef CONFIG_RTE_GBUS_INT + +#define L GBUS_INT_PRIORITY_LOW +#define M GBUS_INT_PRIORITY_MEDIUM +#define H GBUS_INT_PRIORITY_HIGH + +static struct gbus_int_irq_init gbus_irq_inits[] = { +#ifdef CONFIG_RTE_MB_A_PCI + { "MB_A_LAN", IRQ_MB_A_LAN, 1, 1, L }, + { "MB_A_PCI1", IRQ_MB_A_PCI1(0), IRQ_MB_A_PCI1_NUM, 1, L }, + { "MB_A_PCI2", IRQ_MB_A_PCI2(0), IRQ_MB_A_PCI2_NUM, 1, L }, + { "MB_A_EXT", IRQ_MB_A_EXT(0), IRQ_MB_A_EXT_NUM, 1, L }, + { "MB_A_USB_OC",IRQ_MB_A_USB_OC(0), IRQ_MB_A_USB_OC_NUM, 1, L }, + { "MB_A_PCMCIA_OC",IRQ_MB_A_PCMCIA_OC, 1, 1, L }, +#endif + { 0 } +}; +#define NUM_GBUS_IRQ_INITS \ + ((sizeof gbus_irq_inits / sizeof gbus_irq_inits[0]) - 1) + +static struct hw_interrupt_type gbus_hw_itypes[NUM_GBUS_IRQ_INITS]; + +#endif /* CONFIG_RTE_GBUS_INT */ + + +void __init rte_cb_init_irqs (void) +{ +#ifdef CONFIG_RTE_GBUS_INT + gbus_int_init_irqs (); + gbus_int_init_irq_types (gbus_irq_inits, gbus_hw_itypes); +#endif /* CONFIG_RTE_GBUS_INT */ +} |