188d2ce78f
Trim some no longer needed includes from udbg.c and friends. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/*
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* udbg for for NS16550 compatable serial ports
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*
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* Copyright (C) 2001-2005 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <asm/udbg.h>
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#include <asm/io.h>
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extern u8 real_readb(volatile u8 __iomem *addr);
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extern void real_writeb(u8 data, volatile u8 __iomem *addr);
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struct NS16550 {
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/* this struct must be packed */
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unsigned char rbr; /* 0 */
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unsigned char ier; /* 1 */
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unsigned char fcr; /* 2 */
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unsigned char lcr; /* 3 */
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unsigned char mcr; /* 4 */
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unsigned char lsr; /* 5 */
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unsigned char msr; /* 6 */
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unsigned char scr; /* 7 */
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};
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#define thr rbr
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#define iir fcr
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#define dll rbr
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#define dlm ier
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#define dlab lcr
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#define LSR_DR 0x01 /* Data ready */
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#define LSR_OE 0x02 /* Overrun */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_FE 0x08 /* Framing error */
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#define LSR_BI 0x10 /* Break */
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#define LSR_THRE 0x20 /* Xmit holding register empty */
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#define LSR_TEMT 0x40 /* Xmitter empty */
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#define LSR_ERR 0x80 /* Error */
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static volatile struct NS16550 __iomem *udbg_comport;
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static void udbg_550_putc(unsigned char c)
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{
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if (udbg_comport) {
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while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
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/* wait for idle */;
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out_8(&udbg_comport->thr, c);
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if (c == '\n')
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udbg_550_putc('\r');
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}
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}
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static int udbg_550_getc_poll(void)
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{
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if (udbg_comport) {
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if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
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return in_8(&udbg_comport->rbr);
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else
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return -1;
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}
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return -1;
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}
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static unsigned char udbg_550_getc(void)
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{
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if (udbg_comport) {
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while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
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/* wait for char */;
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return in_8(&udbg_comport->rbr);
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}
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return 0;
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}
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void udbg_init_uart(void __iomem *comport, unsigned int speed)
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{
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u16 dll = speed ? (115200 / speed) : 12;
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if (comport) {
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udbg_comport = (struct NS16550 __iomem *)comport;
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out_8(&udbg_comport->lcr, 0x00);
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out_8(&udbg_comport->ier, 0xff);
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out_8(&udbg_comport->ier, 0x00);
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out_8(&udbg_comport->lcr, 0x80); /* Access baud rate */
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out_8(&udbg_comport->dll, dll & 0xff); /* 1 = 115200, 2 = 57600,
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3 = 38400, 12 = 9600 baud */
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out_8(&udbg_comport->dlm, dll >> 8); /* dll >> 8 which should be zero
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for fast rates; */
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out_8(&udbg_comport->lcr, 0x03); /* 8 data, 1 stop, no parity */
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out_8(&udbg_comport->mcr, 0x03); /* RTS/DTR */
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out_8(&udbg_comport->fcr ,0x07); /* Clear & enable FIFOs */
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udbg_putc = udbg_550_putc;
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udbg_getc = udbg_550_getc;
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udbg_getc_poll = udbg_550_getc_poll;
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}
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}
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#ifdef CONFIG_PPC_MAPLE
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void udbg_maple_real_putc(unsigned char c)
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{
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if (udbg_comport) {
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while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
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/* wait for idle */;
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real_writeb(c, &udbg_comport->thr); eieio();
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if (c == '\n')
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udbg_maple_real_putc('\r');
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}
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}
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void udbg_init_maple_realmode(void)
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{
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udbg_comport = (volatile struct NS16550 __iomem *)0xf40003f8;
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udbg_putc = udbg_maple_real_putc;
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udbg_getc = NULL;
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udbg_getc_poll = NULL;
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}
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#endif /* CONFIG_PPC_MAPLE */
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