-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
yaml --- r: 7295 b: refs/heads/master c: 7f85335 h: refs/heads/master i: 7293: 73e8a03 7291: 5957a32 7287: 9fbe239 7279: 0592171 7263: eae7114 7231: 464e25f 7167: 4561ccd v: v3
- Loading branch information
Milton Miller
authored and
Paul Mackerras
committed
Sep 6, 2005
1 parent
6142f64
commit 94638a8
Showing
5 changed files
with
273 additions
and
228 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 37548d58e5ce53dda609c5b35c0eb62d50d59675 | ||
| refs/heads/master: 7f853352e79bf57c4ee279b7458ed0c072e2be76 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| * 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/ppcdebug.h> | ||
| #include <asm/processor.h> | ||
| #include <asm/naca.h> | ||
| #include <asm/uaccess.h> | ||
| #include <asm/machdep.h> | ||
| #include <asm/io.h> | ||
| #include <asm/prom.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 */ | ||
| ppc_md.udbg_putc = udbg_550_putc; | ||
| ppc_md.udbg_getc = udbg_550_getc; | ||
| ppc_md.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; | ||
|
|
||
| ppc_md.udbg_putc = udbg_maple_real_putc; | ||
| ppc_md.udbg_getc = NULL; | ||
| ppc_md.udbg_getc_poll = NULL; | ||
| } | ||
| #endif /* CONFIG_PPC_MAPLE */ |
Oops, something went wrong.