diff options
Diffstat (limited to 'arch/mips/sgi-ip32/ip32-setup.c')
| -rw-r--r-- | arch/mips/sgi-ip32/ip32-setup.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/arch/mips/sgi-ip32/ip32-setup.c b/arch/mips/sgi-ip32/ip32-setup.c new file mode 100644 index 000000000000..8d270be58224 --- /dev/null +++ b/arch/mips/sgi-ip32/ip32-setup.c @@ -0,0 +1,159 @@ +/* + * IP32 basic setup + * + * 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) 2000 Harald Koerfgen + * Copyright (C) 2002, 2003, 2005 Ilya A. Volynets + */ +#include <linux/config.h> +#include <linux/console.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/mc146818rtc.h> +#include <linux/param.h> +#include <linux/sched.h> + +#include <asm/bootinfo.h> +#include <asm/mc146818-time.h> +#include <asm/mipsregs.h> +#include <asm/mmu_context.h> +#include <asm/sgialib.h> +#include <asm/time.h> +#include <asm/traps.h> +#include <asm/io.h> +#include <asm/ip32/crime.h> +#include <asm/ip32/mace.h> +#include <asm/ip32/ip32_ints.h> + +extern void ip32_be_init(void); +extern void crime_init(void); + +#ifdef CONFIG_SGI_O2MACE_ETH +/* + * This is taken care of in here 'cause they say using Arc later on is + * problematic + */ +extern char o2meth_eaddr[8]; +static inline unsigned char str2hexnum(unsigned char c) +{ + if (c >= '0' && c <= '9') + return c - '0'; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + return 0; /* foo */ +} + +static inline void str2eaddr(unsigned char *ea, unsigned char *str) +{ + int i; + + for (i = 0; i < 6; i++) { + unsigned char num; + + if(*str == ':') + str++; + num = str2hexnum(*str++) << 4; + num |= (str2hexnum(*str++)); + ea[i] = num; + } +} +#endif + +#ifdef CONFIG_SERIAL_8250 +#include <linux/tty.h> +#include <linux/serial.h> +#include <linux/serial_core.h> +extern int early_serial_setup(struct uart_port *port); + +#define STD_COM_FLAGS (ASYNC_SKIP_TEST) +#define BASE_BAUD (1843200 / 16) + +#endif /* CONFIG_SERIAL_8250 */ + +/* An arbitrary time; this can be decreased if reliability looks good */ +#define WAIT_MS 10 + +void __init ip32_time_init(void) +{ + printk(KERN_INFO "Calibrating system timer... "); + write_c0_count(0); + crime->timer = 0; + while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ; + mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS; + printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000); +} + +void __init ip32_timer_setup(struct irqaction *irq) +{ + irq->handler = no_action; + setup_irq(IP32_R4K_TIMER_IRQ, irq); +} + +static int __init ip32_setup(void) +{ + board_be_init = ip32_be_init; + + rtc_get_time = mc146818_get_cmos_time; + rtc_set_mmss = mc146818_set_rtc_mmss; + + board_time_init = ip32_time_init; + board_timer_setup = ip32_timer_setup; + +#ifdef CONFIG_SERIAL_8250 + { + static struct uart_port o2_serial[2]; + + memset(o2_serial, 0, sizeof(o2_serial)); + o2_serial[0].type = PORT_16550A; + o2_serial[0].line = 0; + o2_serial[0].irq = MACEISA_SERIAL1_IRQ; + o2_serial[0].flags = STD_COM_FLAGS; + o2_serial[0].uartclk = BASE_BAUD * 16; + o2_serial[0].iotype = UPIO_MEM; + o2_serial[0].membase = (char *)&mace->isa.serial1; + o2_serial[0].fifosize = 14; + /* How much to shift register offset by. Each UART register + * is replicated over 256 byte space */ + o2_serial[0].regshift = 8; + o2_serial[1].type = PORT_16550A; + o2_serial[1].line = 1; + o2_serial[1].irq = MACEISA_SERIAL2_IRQ; + o2_serial[1].flags = STD_COM_FLAGS; + o2_serial[1].uartclk = BASE_BAUD * 16; + o2_serial[1].iotype = UPIO_MEM; + o2_serial[1].membase = (char *)&mace->isa.serial2; + o2_serial[1].fifosize = 14; + o2_serial[1].regshift = 8; + + early_serial_setup(&o2_serial[0]); + early_serial_setup(&o2_serial[1]); + } +#endif +#ifdef CONFIG_SGI_O2MACE_ETH + { + char *mac = ArcGetEnvironmentVariable("eaddr"); + str2eaddr(o2meth_eaddr, mac); + } +#endif + +#if defined(CONFIG_SERIAL_CORE_CONSOLE) + { + char* con = ArcGetEnvironmentVariable("console"); + if (con && *con == 'd') { + static char options[8]; + char *baud = ArcGetEnvironmentVariable("dbaud"); + if (baud) + strcpy(options, baud); + add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0, + baud ? options : NULL); + } + } +#endif + + return 0; +} + +early_initcall(ip32_setup); |