1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2001, 2002 Ralf Baechle 7 */ 8 #include <linux/init.h> 9 #include <linux/console.h> 10 #include <linux/kdev_t.h> 11 #include <linux/major.h> 12 #include <linux/termios.h> 13 #include <linux/sched.h> 14 #include <linux/tty.h> 15 16 #include <asm/page.h> 17 #include <asm/semaphore.h> 18 #include <asm/sn/addrs.h> 19 #include <asm/sn/sn0/hub.h> 20 #include <asm/sn/klconfig.h> 21 #include <asm/sn/ioc3.h> 22 #include <asm/sn/sn_private.h> 23 24 #include <linux/serial.h> 25 #include <linux/serial_core.h> 26 27 #define IOC3_CLK (22000000 / 3) 28 #define IOC3_FLAGS (0) 29 30 static inline struct ioc3_uartregs *console_uart(void) 31 { 32 struct ioc3 *ioc3; 33 34 ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(get_nasid())->memory_base; 35 36 return &ioc3->sregs.uarta; 37 } 38 39 void prom_putchar(char c) 40 { 41 struct ioc3_uartregs *uart = console_uart(); 42 43 while ((uart->iu_lsr & 0x20) == 0); 44 uart->iu_thr = c; 45 } 46 47 char __init prom_getchar(void) 48 { 49 return 0; 50 } 51 52 static void inline ioc3_console_probe(void) 53 { 54 struct uart_port up; 55 56 /* 57 * Register to interrupt zero because we share the interrupt with 58 * the serial driver which we don't properly support yet. 59 */ 60 memset(&up, 0, sizeof(up)); 61 up.membase = (unsigned char *) console_uart(); 62 up.irq = 0; 63 up.uartclk = IOC3_CLK; 64 up.regshift = 0; 65 up.iotype = UPIO_MEM; 66 up.flags = IOC3_FLAGS; 67 up.line = 0; 68 69 if (early_serial_setup(&up)) 70 printk(KERN_ERR "Early serial init of port 0 failed\n"); 71 } 72 73 __init void ip27_setup_console(void) 74 { 75 ioc3_console_probe(); 76 } 77