101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001, 2002, 2004 Ralf Baechle
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*/
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/kdev_t.h>
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#include <linux/major.h>
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#include <linux/termios.h>
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#include <linux/sched.h>
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#include <linux/tty.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <asm/serial.h>
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/* SUPERIO uart register map */
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struct ja_uartregs {
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union {
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volatile u8 pad0[3];
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volatile u8 rbr; /* read only, DLAB == 0 */
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volatile u8 pad1[3];
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volatile u8 thr; /* write only, DLAB == 0 */
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volatile u8 pad2[3];
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volatile u8 dll; /* DLAB == 1 */
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} u1;
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union {
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volatile u8 pad0[3];
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volatile u8 ier; /* DLAB == 0 */
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volatile u8 pad1[3];
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volatile u8 dlm; /* DLAB == 1 */
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} u2;
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union {
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volatile u8 pad0[3];
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volatile u8 iir; /* read only */
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volatile u8 pad1[3];
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volatile u8 fcr; /* write only */
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} u3;
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volatile u8 pad0[3];
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volatile u8 iu_lcr;
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volatile u8 pad1[3];
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volatile u8 iu_mcr;
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volatile u8 pad2[3];
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volatile u8 iu_lsr;
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volatile u8 pad3[3];
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volatile u8 iu_msr;
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volatile u8 pad4[3];
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volatile u8 iu_scr;
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} ja_uregs_t;
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#define iu_rbr u1.rbr
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#define iu_thr u1.thr
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#define iu_dll u1.dll
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#define iu_ier u2.ier
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#define iu_dlm u2.dlm
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#define iu_iir u3.iir
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#define iu_fcr u3.fcr
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extern unsigned long uart_base;
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static inline struct ja_uartregs *console_uart(void)
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{
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return (struct ja_uartregs *) (uart_base + 0x23UL);
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}
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void prom_putchar(char c)
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{
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struct ja_uartregs *uart = console_uart();
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while ((uart->iu_lsr & 0x20) == 0);
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uart->iu_thr = c;
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}
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static void inline ja_console_probe(void)
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{
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struct uart_port up;
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/*
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* Register to interrupt zero because we share the interrupt with
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* the serial driver which we don't properly support yet.
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*/
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memset(&up, 0, sizeof(up));
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up.membase = (unsigned char *) uart_base + 0x23UL;
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up.irq = JAGUAR_ATX_SERIAL1_IRQ;
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up.uartclk = JAGUAR_ATX_UART_CLK;
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up.regshift = 2;
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up.iotype = UPIO_MEM;
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up.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
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up.line = 0;
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if (early_serial_setup(&up))
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printk(KERN_ERR "Early serial init of port 0 failed\n");
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}
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__init void ja_setup_console(void)
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{
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ja_console_probe();
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}
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