Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * hvconsole.c |
| 3 | * Copyright (C) 2004 Hollis Blanchard, IBM Corporation |
| 4 | * Copyright (C) 2004 IBM Corporation |
| 5 | * |
| 6 | * Additional Author(s): |
| 7 | * Ryan S. Arnold <rsa@us.ibm.com> |
| 8 | * |
| 9 | * LPAR console support. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 24 | */ |
| 25 | |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <asm/hvcall.h> |
| 29 | #include <asm/hvconsole.h> |
Anton Blanchard | b9377ff | 2006-07-19 08:01:28 +1000 | [diff] [blame] | 30 | #include "plpar_wrappers.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | /** |
| 33 | * hvc_get_chars - retrieve characters from firmware for denoted vterm adatper |
| 34 | * @vtermno: The vtermno or unit_address of the adapter from which to fetch the |
| 35 | * data. |
| 36 | * @buf: The character buffer into which to put the character data fetched from |
| 37 | * firmware. |
| 38 | * @count: not used? |
| 39 | */ |
| 40 | int hvc_get_chars(uint32_t vtermno, char *buf, int count) |
| 41 | { |
| 42 | unsigned long got; |
| 43 | |
Anton Blanchard | b9377ff | 2006-07-19 08:01:28 +1000 | [diff] [blame] | 44 | if (plpar_get_term_char(vtermno, &got, buf) == H_SUCCESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | return got; |
Anton Blanchard | b9377ff | 2006-07-19 08:01:28 +1000 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | EXPORT_SYMBOL(hvc_get_chars); |
| 51 | |
Milton Miller | 70b234a | 2005-07-07 17:56:26 -0700 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /** |
| 54 | * hvc_put_chars: send characters to firmware for denoted vterm adapter |
| 55 | * @vtermno: The vtermno or unit_address of the adapter from which the data |
| 56 | * originated. |
| 57 | * @buf: The character buffer that contains the character data to send to |
| 58 | * firmware. |
| 59 | * @count: Send this number of characters. |
| 60 | */ |
| 61 | int hvc_put_chars(uint32_t vtermno, const char *buf, int count) |
| 62 | { |
| 63 | unsigned long *lbuf = (unsigned long *) buf; |
| 64 | long ret; |
| 65 | |
Ryan S. Arnold | 45d607e | 2006-03-27 21:25:16 +0200 | [diff] [blame] | 66 | |
| 67 | /* hcall will ret H_PARAMETER if 'count' exceeds firmware max.*/ |
| 68 | if (count > MAX_VIO_PUT_CHARS) |
| 69 | count = MAX_VIO_PUT_CHARS; |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | ret = plpar_hcall_norets(H_PUT_TERM_CHAR, vtermno, count, lbuf[0], |
| 72 | lbuf[1]); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 73 | if (ret == H_SUCCESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | return count; |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 75 | if (ret == H_BUSY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | return 0; |
| 77 | return -EIO; |
| 78 | } |
| 79 | |
| 80 | EXPORT_SYMBOL(hvc_put_chars); |