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 nasid_t nasid; 34 35 nasid = (master_nasid == INVALID_NASID) ? get_nasid() : master_nasid; 36 ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(nasid)->memory_base; 37 38 return &ioc3->sregs.uarta; 39 } 40 41 void prom_putchar(char c) 42 { 43 struct ioc3_uartregs *uart = console_uart(); 44 45 while ((uart->iu_lsr & 0x20) == 0); 46 uart->iu_thr = c; 47 } 48 49 char __init prom_getchar(void) 50 { 51 return 0; 52 } 53 54 static void inline ioc3_console_probe(void) 55 { 56 struct uart_port up; 57 58 /* 59 * Register to interrupt zero because we share the interrupt with 60 * the serial driver which we don't properly support yet. 61 */ 62 memset(&up, 0, sizeof(up)); 63 up.membase = (unsigned char *) console_uart(); 64 up.irq = 0; 65 up.uartclk = IOC3_CLK; 66 up.regshift = 0; 67 up.iotype = UPIO_MEM; 68 up.flags = IOC3_FLAGS; 69 up.line = 0; 70 71 if (early_serial_setup(&up)) 72 printk(KERN_ERR "Early serial init of port 0 failed\n"); 73 } 74 75 __init void ip27_setup_console(void) 76 { 77 ioc3_console_probe(); 78 } 79