diff options
Diffstat (limited to 'arch/mips/gt64120/wrppmc')
| -rw-r--r-- | arch/mips/gt64120/wrppmc/Makefile | 14 | ||||
| -rw-r--r-- | arch/mips/gt64120/wrppmc/int-handler.S | 59 | ||||
| -rw-r--r-- | arch/mips/gt64120/wrppmc/irq.c | 63 | ||||
| -rw-r--r-- | arch/mips/gt64120/wrppmc/pci.c | 53 | ||||
| -rw-r--r-- | arch/mips/gt64120/wrppmc/reset.c | 50 | ||||
| -rw-r--r-- | arch/mips/gt64120/wrppmc/setup.c | 173 | ||||
| -rw-r--r-- | arch/mips/gt64120/wrppmc/time.c | 57 |
7 files changed, 469 insertions, 0 deletions
diff --git a/arch/mips/gt64120/wrppmc/Makefile b/arch/mips/gt64120/wrppmc/Makefile new file mode 100644 index 000000000000..72606b9af12a --- /dev/null +++ b/arch/mips/gt64120/wrppmc/Makefile @@ -0,0 +1,14 @@ +# +# 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. +# +# Copyright 2006 Wind River System, Inc. +# Author: Rongkai.Zhan <rongkai.zhan@windriver.com> +# +# Makefile for the Wind River MIPS 4KC PPMC Eval Board +# + +obj-y += int-handler.o irq.o reset.o setup.o time.o pci.o + +EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/gt64120/wrppmc/int-handler.S b/arch/mips/gt64120/wrppmc/int-handler.S new file mode 100644 index 000000000000..edee7b394175 --- /dev/null +++ b/arch/mips/gt64120/wrppmc/int-handler.S @@ -0,0 +1,59 @@ +/* + * 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. + * + * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle + * Copyright (C) Wind River System Inc. Rongkai.Zhan <rongkai.zhan@windriver.com> + */ +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> +#include <asm/mach-wrppmc/mach-gt64120.h> + + .align 5 + .set noat +NESTED(handle_IRQ, PT_SIZE, sp) + SAVE_ALL + CLI # Important: mark KERNEL mode ! + .set at + + mfc0 t0, CP0_CAUSE # get pending interrupts + mfc0 t1, CP0_STATUS # get enabled interrupts + and t0, t0, t1 # get allowed interrupts + andi t0, t0, 0xFF00 + beqz t0, 1f + move a1, sp # Prepare 'struct pt_regs *regs' pointer + + andi t1, t0, CAUSEF_IP7 # CPU Compare/Count internal timer + bnez t1, handle_cputimer_irq + andi t1, t0, CAUSEF_IP6 # UART 16550 port + bnez t1, handle_uart_irq + andi t1, t0, CAUSEF_IP3 # PCI INT_A + bnez t1, handle_pci_intA_irq + + /* wrong alarm or masked ... */ +1: j spurious_interrupt + nop +END(handle_IRQ) + + .align 5 +handle_cputimer_irq: + li a0, WRPPMC_MIPS_TIMER_IRQ + jal do_IRQ + j ret_from_irq + + .align 5 +handle_uart_irq: + li a0, WRPPMC_UART16550_IRQ + jal do_IRQ + j ret_from_irq + + .align 5 +handle_pci_intA_irq: + li a0, WRPPMC_PCI_INTA_IRQ + jal do_IRQ + j ret_from_irq + diff --git a/arch/mips/gt64120/wrppmc/irq.c b/arch/mips/gt64120/wrppmc/irq.c new file mode 100644 index 000000000000..8605687e24ed --- /dev/null +++ b/arch/mips/gt64120/wrppmc/irq.c @@ -0,0 +1,63 @@ +/* + * irq.c: GT64120 Interrupt Controller + * + * Copyright (C) 2006, Wind River System Inc. + * Author: Rongkai.Zhan, <rongkai.zhan@windriver.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <linux/bitops.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/bitops.h> +#include <asm/mipsregs.h> +#include <asm/system.h> +#include <asm/irq_cpu.h> +#include <asm/gt64120.h> + +extern asmlinkage void handle_IRQ(void); + +/** + * Initialize GT64120 Interrupt Controller + */ +void gt64120_init_pic(void) +{ + /* clear CPU Interrupt Cause Registers */ + GT_WRITE(GT_INTRCAUSE_OFS, (0x1F << 21)); + GT_WRITE(GT_HINTRCAUSE_OFS, 0x00); + + /* Disable all interrupts from GT64120 bridge chip */ + GT_WRITE(GT_INTRMASK_OFS, 0x00); + GT_WRITE(GT_HINTRMASK_OFS, 0x00); + GT_WRITE(GT_PCI0_ICMASK_OFS, 0x00); + GT_WRITE(GT_PCI0_HICMASK_OFS, 0x00); +} + +void __init arch_init_irq(void) +{ + /* enable all CPU interrupt bits. */ + set_c0_status(ST0_IM); /* IE bit is still 0 */ + + /* Install MIPS Interrupt Trap Vector */ + set_except_vector(0, handle_IRQ); + + /* IRQ 0 - 7 are for MIPS common irq_cpu controller */ + mips_cpu_irq_init(0); + + gt64120_init_pic(); +} diff --git a/arch/mips/gt64120/wrppmc/pci.c b/arch/mips/gt64120/wrppmc/pci.c new file mode 100644 index 000000000000..2fbe93467f78 --- /dev/null +++ b/arch/mips/gt64120/wrppmc/pci.c @@ -0,0 +1,53 @@ +/* + * pci.c: GT64120 PCI support. + * + * Copyright (C) 2006, Wind River System Inc. Rongkai.Zhan <rongkai.zhan@windriver.com> + * + * 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. + */ +#include <linux/init.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <asm/gt64120.h> + +extern struct pci_ops gt64120_pci_ops; + +static struct resource pci0_io_resource = { + .name = "pci_0 io", + .start = GT_PCI_IO_BASE, + .end = GT_PCI_IO_BASE + GT_PCI_IO_SIZE - 1, + .flags = IORESOURCE_IO, +}; + +static struct resource pci0_mem_resource = { + .name = "pci_0 memory", + .start = GT_PCI_MEM_BASE, + .end = GT_PCI_MEM_BASE + GT_PCI_MEM_SIZE - 1, + .flags = IORESOURCE_MEM, +}; + +static struct pci_controller hose_0 = { + .pci_ops = >64120_pci_ops, + .io_resource = &pci0_io_resource, + .mem_resource = &pci0_mem_resource, +}; + +static int __init gt64120_pci_init(void) +{ + u32 tmp; + + tmp = GT_READ(GT_PCI0_CMD_OFS); /* Huh??? -- Ralf */ + tmp = GT_READ(GT_PCI0_BARE_OFS); + + /* reset the whole PCI I/O space range */ + ioport_resource.start = GT_PCI_IO_BASE; + ioport_resource.end = GT_PCI_IO_BASE + GT_PCI_IO_SIZE - 1; + + register_pci_controller(&hose_0); + return 0; +} + +arch_initcall(gt64120_pci_init); diff --git a/arch/mips/gt64120/wrppmc/reset.c b/arch/mips/gt64120/wrppmc/reset.c new file mode 100644 index 000000000000..b97039c6d3db --- /dev/null +++ b/arch/mips/gt64120/wrppmc/reset.c @@ -0,0 +1,50 @@ +/* + * 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. + * + * Copyright (C) 1997 Ralf Baechle + */ +#include <linux/sched.h> +#include <linux/mm.h> +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/processor.h> +#include <asm/reboot.h> +#include <asm/system.h> +#include <asm/cacheflush.h> + +void wrppmc_machine_restart(char *command) +{ + /* + * Ouch, we're still alive ... This time we take the silver bullet ... + * ... and find that we leave the hardware in a state in which the + * kernel in the flush locks up somewhen during of after the PCI + * detection stuff. + */ + local_irq_disable(); + set_c0_status(ST0_BEV | ST0_ERL); + change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED); + flush_cache_all(); + write_c0_wired(0); + __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000)); +} + +void wrppmc_machine_halt(void) +{ + local_irq_disable(); + + printk(KERN_NOTICE "You can safely turn off the power\n"); + while (1) { + __asm__( + ".set\tmips3\n\t" + "wait\n\t" + ".set\tmips0" + ); + } +} + +void wrppmc_machine_power_off(void) +{ + wrppmc_machine_halt(); +} diff --git a/arch/mips/gt64120/wrppmc/setup.c b/arch/mips/gt64120/wrppmc/setup.c new file mode 100644 index 000000000000..20c591e49dae --- /dev/null +++ b/arch/mips/gt64120/wrppmc/setup.c @@ -0,0 +1,173 @@ +/* + * setup.c: Setup pointers to hardware dependent routines. + * + * 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. + * + * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2006, Wind River System Inc. Rongkai.zhan <rongkai.zhan@windriver.com> + */ +#include <linux/config.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/tty.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +#include <linux/pm.h> + +#include <asm/io.h> +#include <asm/bootinfo.h> +#include <asm/reboot.h> +#include <asm/time.h> +#include <asm/gt64120.h> + +unsigned long gt64120_base = KSEG1ADDR(0x14000000); + +#ifdef WRPPMC_EARLY_DEBUG + +static volatile unsigned char * wrppmc_led = \ + (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE); + +/* + * PPMC LED control register: + * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON) + * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON) + * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON) + */ +void wrppmc_led_on(int mask) +{ + unsigned char value = *wrppmc_led; + + value &= (0xF8 | mask); + *wrppmc_led = value; +} + +/* If mask = 0, turn off all LEDs */ +void wrppmc_led_off(int mask) +{ + unsigned char value = *wrppmc_led; + + value |= (0x7 & mask); + *wrppmc_led = value; +} + +/* + * We assume that bootloader has initialized UART16550 correctly + */ +void __init wrppmc_early_putc(char ch) +{ + static volatile unsigned char *wrppmc_uart = \ + (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE); + unsigned char value; + + /* Wait until Transmit-Holding-Register is empty */ + while (1) { + value = *(wrppmc_uart + 5); + if (value & 0x20) + break; + } + + *wrppmc_uart = ch; +} + +void __init wrppmc_early_printk(const char *fmt, ...) +{ + static char pbuf[256] = {'\0', }; + char *ch = pbuf; + va_list args; + unsigned int i; + + memset(pbuf, 0, 256); + va_start(args, fmt); + i = vsprintf(pbuf, fmt, args); + va_end(args); + + /* Print the string */ + while (*ch != '\0') { + wrppmc_early_putc(*ch); + /* if print '\n', also print '\r' */ + if (*ch++ == '\n') + wrppmc_early_putc('\r'); + } +} +#endif /* WRPPMC_EARLY_DEBUG */ + +unsigned long __init prom_free_prom_memory(void) +{ + return 0; +} + +#ifdef CONFIG_SERIAL_8250 +static void wrppmc_setup_serial(void) +{ + struct uart_port up; + + memset(&up, 0x00, sizeof(struct uart_port)); + + /* + * A note about mapbase/membase + * -) mapbase is the physical address of the IO port. + * -) membase is an 'ioremapped' cookie. + */ + up.line = 0; + up.type = PORT_16550; + up.iotype = UPIO_MEM; + up.mapbase = WRPPMC_UART16550_BASE; + up.membase = ioremap(up.mapbase, 8); + up.irq = WRPPMC_UART16550_IRQ; + up.uartclk = WRPPMC_UART16550_CLOCK; + up.flags = UPF_SKIP_TEST/* | UPF_BOOT_AUTOCONF */; + up.regshift = 0; + + early_serial_setup(&up); +} +#endif + +void __init plat_setup(void) +{ + extern void wrppmc_time_init(void); + extern void wrppmc_timer_setup(struct irqaction *); + extern void wrppmc_machine_restart(char *command); + extern void wrppmc_machine_halt(void); + extern void wrppmc_machine_power_off(void); + + _machine_restart = wrppmc_machine_restart; + _machine_halt = wrppmc_machine_halt; + pm_power_off = wrppmc_machine_power_off; + + /* Use MIPS Count/Compare Timer */ + board_time_init = wrppmc_time_init; + board_timer_setup = wrppmc_timer_setup; + + /* This makes the operations of 'in/out[bwl]' to the + * physical address ( < KSEG0) can work via KSEG1 + */ + set_io_port_base(KSEG1); + +#ifdef CONFIG_SERIAL_8250 + wrppmc_setup_serial(); +#endif +} + +const char *get_system_type(void) +{ + return "Wind River PPMC (GT64120)"; +} + +/* + * Initializes basic routines and structures pointers, memory size (as + * given by the bios and saves the command line. + */ +void __init prom_init(void) +{ + mips_machgroup = MACH_GROUP_GALILEO; + mips_machtype = MACH_EV64120A; + + add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM); + add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA); + + wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n", + WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE)); +} diff --git a/arch/mips/gt64120/wrppmc/time.c b/arch/mips/gt64120/wrppmc/time.c new file mode 100644 index 000000000000..175d22adb450 --- /dev/null +++ b/arch/mips/gt64120/wrppmc/time.c @@ -0,0 +1,57 @@ +/* + * time.c: MIPS CPU Count/Compare timer hookup + * + * Author: Mark.Zhan, <rongkai.zhan@windriver.com> + * + * 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. + * + * Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2006, Wind River System Inc. + */ +#include <linux/config.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/param.h> /* for HZ */ +#include <linux/irq.h> +#include <linux/timex.h> +#include <linux/interrupt.h> + +#include <asm/reboot.h> +#include <asm/time.h> +#include <asm/io.h> +#include <asm/bootinfo.h> +#include <asm/gt64120.h> + +#define WRPPMC_CPU_CLK_FREQ 40000000 /* 40MHZ */ + +void __init wrppmc_timer_setup(struct irqaction *irq) +{ + /* Install ISR for timer interrupt */ + setup_irq(WRPPMC_MIPS_TIMER_IRQ, irq); + + /* to generate the first timer interrupt */ + write_c0_compare(mips_hpt_frequency/HZ); + write_c0_count(0); +} + +/* + * Estimate CPU frequency. Sets mips_hpt_frequency as a side-effect + * + * NOTE: We disable all GT64120 timers, and use MIPS processor internal + * timer as the source of kernel clock tick. + */ +void __init wrppmc_time_init(void) +{ + /* Disable GT64120 timers */ + GT_WRITE(GT_TC_CONTROL_OFS, 0x00); + GT_WRITE(GT_TC0_OFS, 0x00); + GT_WRITE(GT_TC1_OFS, 0x00); + GT_WRITE(GT_TC2_OFS, 0x00); + GT_WRITE(GT_TC3_OFS, 0x00); + + /* Use MIPS compare/count internal timer */ + mips_hpt_frequency = WRPPMC_CPU_CLK_FREQ; +} |