17568cb4eSPaul Mackerras /* 27568cb4eSPaul Mackerras * hvconsole.c 37568cb4eSPaul Mackerras * Copyright (C) 2004 Hollis Blanchard, IBM Corporation 47568cb4eSPaul Mackerras * Copyright (C) 2004 IBM Corporation 57568cb4eSPaul Mackerras * 67568cb4eSPaul Mackerras * Additional Author(s): 77568cb4eSPaul Mackerras * Ryan S. Arnold <rsa@us.ibm.com> 87568cb4eSPaul Mackerras * 97568cb4eSPaul Mackerras * LPAR console support. 107568cb4eSPaul Mackerras * 117568cb4eSPaul Mackerras * This program is free software; you can redistribute it and/or modify 127568cb4eSPaul Mackerras * it under the terms of the GNU General Public License as published by 137568cb4eSPaul Mackerras * the Free Software Foundation; either version 2 of the License, or 147568cb4eSPaul Mackerras * (at your option) any later version. 157568cb4eSPaul Mackerras * 167568cb4eSPaul Mackerras * This program is distributed in the hope that it will be useful, 177568cb4eSPaul Mackerras * but WITHOUT ANY WARRANTY; without even the implied warranty of 187568cb4eSPaul Mackerras * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 197568cb4eSPaul Mackerras * GNU General Public License for more details. 207568cb4eSPaul Mackerras * 217568cb4eSPaul Mackerras * You should have received a copy of the GNU General Public License 227568cb4eSPaul Mackerras * along with this program; if not, write to the Free Software 237568cb4eSPaul Mackerras * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 247568cb4eSPaul Mackerras */ 257568cb4eSPaul Mackerras 267568cb4eSPaul Mackerras #include <linux/kernel.h> 277568cb4eSPaul Mackerras #include <linux/module.h> 287568cb4eSPaul Mackerras #include <asm/hvcall.h> 297568cb4eSPaul Mackerras #include <asm/hvconsole.h> 307568cb4eSPaul Mackerras 317568cb4eSPaul Mackerras /** 327568cb4eSPaul Mackerras * hvc_get_chars - retrieve characters from firmware for denoted vterm adatper 337568cb4eSPaul Mackerras * @vtermno: The vtermno or unit_address of the adapter from which to fetch the 347568cb4eSPaul Mackerras * data. 357568cb4eSPaul Mackerras * @buf: The character buffer into which to put the character data fetched from 367568cb4eSPaul Mackerras * firmware. 377568cb4eSPaul Mackerras * @count: not used? 387568cb4eSPaul Mackerras */ 397568cb4eSPaul Mackerras int hvc_get_chars(uint32_t vtermno, char *buf, int count) 407568cb4eSPaul Mackerras { 417568cb4eSPaul Mackerras unsigned long got; 427568cb4eSPaul Mackerras 437568cb4eSPaul Mackerras if (plpar_hcall(H_GET_TERM_CHAR, vtermno, 0, 0, 0, &got, 44706c8c93SSegher Boessenkool (unsigned long *)buf, (unsigned long *)buf+1) == H_SUCCESS) 457568cb4eSPaul Mackerras return got; 467568cb4eSPaul Mackerras return 0; 477568cb4eSPaul Mackerras } 487568cb4eSPaul Mackerras 497568cb4eSPaul Mackerras EXPORT_SYMBOL(hvc_get_chars); 507568cb4eSPaul Mackerras 517568cb4eSPaul Mackerras 527568cb4eSPaul Mackerras /** 537568cb4eSPaul Mackerras * hvc_put_chars: send characters to firmware for denoted vterm adapter 547568cb4eSPaul Mackerras * @vtermno: The vtermno or unit_address of the adapter from which the data 557568cb4eSPaul Mackerras * originated. 567568cb4eSPaul Mackerras * @buf: The character buffer that contains the character data to send to 577568cb4eSPaul Mackerras * firmware. 587568cb4eSPaul Mackerras * @count: Send this number of characters. 597568cb4eSPaul Mackerras */ 607568cb4eSPaul Mackerras int hvc_put_chars(uint32_t vtermno, const char *buf, int count) 617568cb4eSPaul Mackerras { 627568cb4eSPaul Mackerras unsigned long *lbuf = (unsigned long *) buf; 637568cb4eSPaul Mackerras long ret; 647568cb4eSPaul Mackerras 6545d607edSRyan S. Arnold 6645d607edSRyan S. Arnold /* hcall will ret H_PARAMETER if 'count' exceeds firmware max.*/ 6745d607edSRyan S. Arnold if (count > MAX_VIO_PUT_CHARS) 6845d607edSRyan S. Arnold count = MAX_VIO_PUT_CHARS; 6945d607edSRyan S. Arnold 707568cb4eSPaul Mackerras ret = plpar_hcall_norets(H_PUT_TERM_CHAR, vtermno, count, lbuf[0], 717568cb4eSPaul Mackerras lbuf[1]); 72706c8c93SSegher Boessenkool if (ret == H_SUCCESS) 737568cb4eSPaul Mackerras return count; 74706c8c93SSegher Boessenkool if (ret == H_BUSY) 757568cb4eSPaul Mackerras return 0; 767568cb4eSPaul Mackerras return -EIO; 777568cb4eSPaul Mackerras } 787568cb4eSPaul Mackerras 797568cb4eSPaul Mackerras EXPORT_SYMBOL(hvc_put_chars); 80