summaryrefslogtreecommitdiffstats
path: root/arch/ppc64/kernel/udbg_16550.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc64/kernel/udbg_16550.c')
-rw-r--r--arch/ppc64/kernel/udbg_16550.c123
1 files changed, 0 insertions, 123 deletions
diff --git a/arch/ppc64/kernel/udbg_16550.c b/arch/ppc64/kernel/udbg_16550.c
deleted file mode 100644
index 9313574ab935..000000000000
--- a/arch/ppc64/kernel/udbg_16550.c
+++ /dev/null
@@ -1,123 +0,0 @@
-/*
- * udbg for for NS16550 compatable serial ports
- *
- * Copyright (C) 2001-2005 PPC 64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#include <linux/config.h>
-#include <linux/types.h>
-#include <asm/udbg.h>
-#include <asm/io.h>
-
-extern u8 real_readb(volatile u8 __iomem *addr);
-extern void real_writeb(u8 data, volatile u8 __iomem *addr);
-
-struct NS16550 {
- /* this struct must be packed */
- unsigned char rbr; /* 0 */
- unsigned char ier; /* 1 */
- unsigned char fcr; /* 2 */
- unsigned char lcr; /* 3 */
- unsigned char mcr; /* 4 */
- unsigned char lsr; /* 5 */
- unsigned char msr; /* 6 */
- unsigned char scr; /* 7 */
-};
-
-#define thr rbr
-#define iir fcr
-#define dll rbr
-#define dlm ier
-#define dlab lcr
-
-#define LSR_DR 0x01 /* Data ready */
-#define LSR_OE 0x02 /* Overrun */
-#define LSR_PE 0x04 /* Parity error */
-#define LSR_FE 0x08 /* Framing error */
-#define LSR_BI 0x10 /* Break */
-#define LSR_THRE 0x20 /* Xmit holding register empty */
-#define LSR_TEMT 0x40 /* Xmitter empty */
-#define LSR_ERR 0x80 /* Error */
-
-static volatile struct NS16550 __iomem *udbg_comport;
-
-static void udbg_550_putc(unsigned char c)
-{
- if (udbg_comport) {
- while ((in_8(&udbg_comport->lsr) & LSR_THRE) == 0)
- /* wait for idle */;
- out_8(&udbg_comport->thr, c);
- if (c == '\n')
- udbg_550_putc('\r');
- }
-}
-
-static int udbg_550_getc_poll(void)
-{
- if (udbg_comport) {
- if ((in_8(&udbg_comport->lsr) & LSR_DR) != 0)
- return in_8(&udbg_comport->rbr);
- else
- return -1;
- }
- return -1;
-}
-
-static unsigned char udbg_550_getc(void)
-{
- if (udbg_comport) {
- while ((in_8(&udbg_comport->lsr) & LSR_DR) == 0)
- /* wait for char */;
- return in_8(&udbg_comport->rbr);
- }
- return 0;
-}
-
-void udbg_init_uart(void __iomem *comport, unsigned int speed)
-{
- u16 dll = speed ? (115200 / speed) : 12;
-
- if (comport) {
- udbg_comport = (struct NS16550 __iomem *)comport;
- out_8(&udbg_comport->lcr, 0x00);
- out_8(&udbg_comport->ier, 0xff);
- out_8(&udbg_comport->ier, 0x00);
- out_8(&udbg_comport->lcr, 0x80); /* Access baud rate */
- out_8(&udbg_comport->dll, dll & 0xff); /* 1 = 115200, 2 = 57600,
- 3 = 38400, 12 = 9600 baud */
- out_8(&udbg_comport->dlm, dll >> 8); /* dll >> 8 which should be zero
- for fast rates; */
- out_8(&udbg_comport->lcr, 0x03); /* 8 data, 1 stop, no parity */
- out_8(&udbg_comport->mcr, 0x03); /* RTS/DTR */
- out_8(&udbg_comport->fcr ,0x07); /* Clear & enable FIFOs */
- udbg_putc = udbg_550_putc;
- udbg_getc = udbg_550_getc;
- udbg_getc_poll = udbg_550_getc_poll;
- }
-}
-
-#ifdef CONFIG_PPC_MAPLE
-void udbg_maple_real_putc(unsigned char c)
-{
- if (udbg_comport) {
- while ((real_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
- /* wait for idle */;
- real_writeb(c, &udbg_comport->thr); eieio();
- if (c == '\n')
- udbg_maple_real_putc('\r');
- }
-}
-
-void udbg_init_maple_realmode(void)
-{
- udbg_comport = (volatile struct NS16550 __iomem *)0xf40003f8;
-
- udbg_putc = udbg_maple_real_putc;
- udbg_getc = NULL;
- udbg_getc_poll = NULL;
-}
-#endif /* CONFIG_PPC_MAPLE */