11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * ISA Plug & Play support 3c1017a4cSJaroslav Kysela * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 81da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 91da177e4SLinus Torvalds * (at your option) any later version. 101da177e4SLinus Torvalds * 111da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 121da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 131da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 141da177e4SLinus Torvalds * GNU General Public License for more details. 151da177e4SLinus Torvalds * 161da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 171da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 181da177e4SLinus Torvalds * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * Changelog: 211da177e4SLinus Torvalds * 2000-01-01 Added quirks handling for buggy hardware 221da177e4SLinus Torvalds * Peter Denison <peterd@pnd-pc.demon.co.uk> 231da177e4SLinus Torvalds * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev() 241da177e4SLinus Torvalds * Christoph Hellwig <hch@infradead.org> 251da177e4SLinus Torvalds * 2001-06-03 Added release_region calls to correspond with 261da177e4SLinus Torvalds * request_region calls when a failure occurs. Also 271da177e4SLinus Torvalds * added KERN_* constants to printk() calls. 281da177e4SLinus Torvalds * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines 291da177e4SLinus Torvalds * of the pci driver interface 301da177e4SLinus Torvalds * Kai Germaschewski <kai.germaschewski@gmx.de> 311da177e4SLinus Torvalds * 2002-06-06 Made the use of dma channel 0 configurable 321da177e4SLinus Torvalds * Gerald Teschl <gerald.teschl@univie.ac.at> 331da177e4SLinus Torvalds * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com> 341da177e4SLinus Torvalds * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com> 351da177e4SLinus Torvalds */ 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include <linux/module.h> 381da177e4SLinus Torvalds #include <linux/kernel.h> 391da177e4SLinus Torvalds #include <linux/errno.h> 401da177e4SLinus Torvalds #include <linux/slab.h> 411da177e4SLinus Torvalds #include <linux/delay.h> 421da177e4SLinus Torvalds #include <linux/init.h> 431da177e4SLinus Torvalds #include <linux/isapnp.h> 4414cc3e2bSIngo Molnar #include <linux/mutex.h> 451da177e4SLinus Torvalds #include <asm/io.h> 461da177e4SLinus Torvalds 47772defc6SBjorn Helgaas #include "../base.h" 48772defc6SBjorn Helgaas 491da177e4SLinus Torvalds #if 0 501da177e4SLinus Torvalds #define ISAPNP_REGION_OK 511da177e4SLinus Torvalds #endif 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds int isapnp_disable; /* Disable ISA PnP */ 541da177e4SLinus Torvalds static int isapnp_rdp; /* Read Data Port */ 551da177e4SLinus Torvalds static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ 561da177e4SLinus Torvalds static int isapnp_verbose = 1; /* verbose mode */ 571da177e4SLinus Torvalds 58c1017a4cSJaroslav Kysela MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 591da177e4SLinus Torvalds MODULE_DESCRIPTION("Generic ISA Plug & Play support"); 601da177e4SLinus Torvalds module_param(isapnp_disable, int, 0); 611da177e4SLinus Torvalds MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); 621da177e4SLinus Torvalds module_param(isapnp_rdp, int, 0); 631da177e4SLinus Torvalds MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); 641da177e4SLinus Torvalds module_param(isapnp_reset, int, 0); 651da177e4SLinus Torvalds MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); 661da177e4SLinus Torvalds module_param(isapnp_verbose, int, 0); 671da177e4SLinus Torvalds MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); 681da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds #define _PIDXR 0x279 711da177e4SLinus Torvalds #define _PNPWRP 0xa79 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds /* short tags */ 741da177e4SLinus Torvalds #define _STAG_PNPVERNO 0x01 751da177e4SLinus Torvalds #define _STAG_LOGDEVID 0x02 761da177e4SLinus Torvalds #define _STAG_COMPATDEVID 0x03 771da177e4SLinus Torvalds #define _STAG_IRQ 0x04 781da177e4SLinus Torvalds #define _STAG_DMA 0x05 791da177e4SLinus Torvalds #define _STAG_STARTDEP 0x06 801da177e4SLinus Torvalds #define _STAG_ENDDEP 0x07 811da177e4SLinus Torvalds #define _STAG_IOPORT 0x08 821da177e4SLinus Torvalds #define _STAG_FIXEDIO 0x09 831da177e4SLinus Torvalds #define _STAG_VENDOR 0x0e 841da177e4SLinus Torvalds #define _STAG_END 0x0f 851da177e4SLinus Torvalds /* long tags */ 861da177e4SLinus Torvalds #define _LTAG_MEMRANGE 0x81 871da177e4SLinus Torvalds #define _LTAG_ANSISTR 0x82 881da177e4SLinus Torvalds #define _LTAG_UNICODESTR 0x83 891da177e4SLinus Torvalds #define _LTAG_VENDOR 0x84 901da177e4SLinus Torvalds #define _LTAG_MEM32RANGE 0x85 911da177e4SLinus Torvalds #define _LTAG_FIXEDMEM32RANGE 0x86 921da177e4SLinus Torvalds 93ca0e8b6fSBjorn Helgaas /* Logical device control and configuration registers */ 94ca0e8b6fSBjorn Helgaas 95ca0e8b6fSBjorn Helgaas #define ISAPNP_CFG_ACTIVATE 0x30 /* byte */ 96ca0e8b6fSBjorn Helgaas #define ISAPNP_CFG_MEM 0x40 /* 4 * dword */ 97ca0e8b6fSBjorn Helgaas #define ISAPNP_CFG_PORT 0x60 /* 8 * word */ 98ca0e8b6fSBjorn Helgaas #define ISAPNP_CFG_IRQ 0x70 /* 2 * word */ 99ca0e8b6fSBjorn Helgaas #define ISAPNP_CFG_DMA 0x74 /* 2 * byte */ 100ca0e8b6fSBjorn Helgaas 101245073f0SBjorn Helgaas /* 102245073f0SBjorn Helgaas * Sizes of ISAPNP logical device configuration register sets. 103245073f0SBjorn Helgaas * See PNP-ISA-v1.0a.pdf, Appendix A. 104245073f0SBjorn Helgaas */ 105245073f0SBjorn Helgaas #define ISAPNP_MAX_MEM 4 106245073f0SBjorn Helgaas #define ISAPNP_MAX_PORT 8 107245073f0SBjorn Helgaas #define ISAPNP_MAX_IRQ 2 108245073f0SBjorn Helgaas #define ISAPNP_MAX_DMA 2 109245073f0SBjorn Helgaas 1101da177e4SLinus Torvalds static unsigned char isapnp_checksum_value; 11114cc3e2bSIngo Molnar static DEFINE_MUTEX(isapnp_cfg_mutex); 1121da177e4SLinus Torvalds static int isapnp_csn_count; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds /* some prototypes */ 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds static inline void write_data(unsigned char x) 1171da177e4SLinus Torvalds { 1181da177e4SLinus Torvalds outb(x, _PNPWRP); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static inline void write_address(unsigned char x) 1221da177e4SLinus Torvalds { 1231da177e4SLinus Torvalds outb(x, _PIDXR); 1241da177e4SLinus Torvalds udelay(20); 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds static inline unsigned char read_data(void) 1281da177e4SLinus Torvalds { 1291da177e4SLinus Torvalds unsigned char val = inb(isapnp_rdp); 1301da177e4SLinus Torvalds return val; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds unsigned char isapnp_read_byte(unsigned char idx) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds write_address(idx); 1361da177e4SLinus Torvalds return read_data(); 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds static unsigned short isapnp_read_word(unsigned char idx) 1401da177e4SLinus Torvalds { 1411da177e4SLinus Torvalds unsigned short val; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds val = isapnp_read_byte(idx); 1441da177e4SLinus Torvalds val = (val << 8) + isapnp_read_byte(idx + 1); 1451da177e4SLinus Torvalds return val; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds void isapnp_write_byte(unsigned char idx, unsigned char val) 1491da177e4SLinus Torvalds { 1501da177e4SLinus Torvalds write_address(idx); 1511da177e4SLinus Torvalds write_data(val); 1521da177e4SLinus Torvalds } 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds static void isapnp_write_word(unsigned char idx, unsigned short val) 1551da177e4SLinus Torvalds { 1561da177e4SLinus Torvalds isapnp_write_byte(idx, val >> 8); 1571da177e4SLinus Torvalds isapnp_write_byte(idx + 1, val); 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds static void isapnp_key(void) 1611da177e4SLinus Torvalds { 1621da177e4SLinus Torvalds unsigned char code = 0x6a, msb; 1631da177e4SLinus Torvalds int i; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds mdelay(1); 1661da177e4SLinus Torvalds write_address(0x00); 1671da177e4SLinus Torvalds write_address(0x00); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds write_address(code); 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds for (i = 1; i < 32; i++) { 1721da177e4SLinus Torvalds msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; 1731da177e4SLinus Torvalds code = (code >> 1) | msb; 1741da177e4SLinus Torvalds write_address(code); 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds /* place all pnp cards in wait-for-key state */ 1791da177e4SLinus Torvalds static void isapnp_wait(void) 1801da177e4SLinus Torvalds { 1811da177e4SLinus Torvalds isapnp_write_byte(0x02, 0x02); 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds static void isapnp_wake(unsigned char csn) 1851da177e4SLinus Torvalds { 1861da177e4SLinus Torvalds isapnp_write_byte(0x03, csn); 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds static void isapnp_device(unsigned char logdev) 1901da177e4SLinus Torvalds { 1911da177e4SLinus Torvalds isapnp_write_byte(0x07, logdev); 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds static void isapnp_activate(unsigned char logdev) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds isapnp_device(logdev); 1971da177e4SLinus Torvalds isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); 1981da177e4SLinus Torvalds udelay(250); 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds static void isapnp_deactivate(unsigned char logdev) 2021da177e4SLinus Torvalds { 2031da177e4SLinus Torvalds isapnp_device(logdev); 2041da177e4SLinus Torvalds isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); 2051da177e4SLinus Torvalds udelay(500); 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds static void __init isapnp_peek(unsigned char *data, int bytes) 2091da177e4SLinus Torvalds { 2101da177e4SLinus Torvalds int i, j; 2111da177e4SLinus Torvalds unsigned char d = 0; 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds for (i = 1; i <= bytes; i++) { 2141da177e4SLinus Torvalds for (j = 0; j < 20; j++) { 2151da177e4SLinus Torvalds d = isapnp_read_byte(0x05); 2161da177e4SLinus Torvalds if (d & 1) 2171da177e4SLinus Torvalds break; 2181da177e4SLinus Torvalds udelay(100); 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds if (!(d & 1)) { 2211da177e4SLinus Torvalds if (data != NULL) 2221da177e4SLinus Torvalds *data++ = 0xff; 2231da177e4SLinus Torvalds continue; 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds d = isapnp_read_byte(0x04); /* PRESDI */ 2261da177e4SLinus Torvalds isapnp_checksum_value += d; 2271da177e4SLinus Torvalds if (data != NULL) 2281da177e4SLinus Torvalds *data++ = d; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds #define RDP_STEP 32 /* minimum is 4 */ 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds static int isapnp_next_rdp(void) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds int rdp = isapnp_rdp; 2371da177e4SLinus Torvalds static int old_rdp = 0; 2381da177e4SLinus Torvalds 2399dd78466SBjorn Helgaas if (old_rdp) { 2401da177e4SLinus Torvalds release_region(old_rdp, 1); 2411da177e4SLinus Torvalds old_rdp = 0; 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds while (rdp <= 0x3ff) { 2441da177e4SLinus Torvalds /* 2451da177e4SLinus Torvalds * We cannot use NE2000 probe spaces for ISAPnP or we 2461da177e4SLinus Torvalds * will lock up machines. 2471da177e4SLinus Torvalds */ 2489dd78466SBjorn Helgaas if ((rdp < 0x280 || rdp > 0x380) 2499dd78466SBjorn Helgaas && request_region(rdp, 1, "ISAPnP")) { 2501da177e4SLinus Torvalds isapnp_rdp = rdp; 2511da177e4SLinus Torvalds old_rdp = rdp; 2521da177e4SLinus Torvalds return 0; 2531da177e4SLinus Torvalds } 2541da177e4SLinus Torvalds rdp += RDP_STEP; 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds return -1; 2571da177e4SLinus Torvalds } 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds /* Set read port address */ 2601da177e4SLinus Torvalds static inline void isapnp_set_rdp(void) 2611da177e4SLinus Torvalds { 2621da177e4SLinus Torvalds isapnp_write_byte(0x00, isapnp_rdp >> 2); 2631da177e4SLinus Torvalds udelay(100); 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds /* 2671da177e4SLinus Torvalds * Perform an isolation. The port selection code now tries to avoid 2681da177e4SLinus Torvalds * "dangerous to read" ports. 2691da177e4SLinus Torvalds */ 2701da177e4SLinus Torvalds static int __init isapnp_isolate_rdp_select(void) 2711da177e4SLinus Torvalds { 2721da177e4SLinus Torvalds isapnp_wait(); 2731da177e4SLinus Torvalds isapnp_key(); 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds /* Control: reset CSN and conditionally everything else too */ 2761da177e4SLinus Torvalds isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); 2771da177e4SLinus Torvalds mdelay(2); 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds isapnp_wait(); 2801da177e4SLinus Torvalds isapnp_key(); 2811da177e4SLinus Torvalds isapnp_wake(0x00); 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds if (isapnp_next_rdp() < 0) { 2841da177e4SLinus Torvalds isapnp_wait(); 2851da177e4SLinus Torvalds return -1; 2861da177e4SLinus Torvalds } 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds isapnp_set_rdp(); 2891da177e4SLinus Torvalds udelay(1000); 2901da177e4SLinus Torvalds write_address(0x01); 2911da177e4SLinus Torvalds udelay(1000); 2921da177e4SLinus Torvalds return 0; 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds /* 2961da177e4SLinus Torvalds * Isolate (assign uniqued CSN) to all ISA PnP devices. 2971da177e4SLinus Torvalds */ 2981da177e4SLinus Torvalds static int __init isapnp_isolate(void) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds unsigned char checksum = 0x6a; 3011da177e4SLinus Torvalds unsigned char chksum = 0x00; 3021da177e4SLinus Torvalds unsigned char bit = 0x00; 3031da177e4SLinus Torvalds int data; 3041da177e4SLinus Torvalds int csn = 0; 3051da177e4SLinus Torvalds int i; 3061da177e4SLinus Torvalds int iteration = 1; 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds isapnp_rdp = 0x213; 3091da177e4SLinus Torvalds if (isapnp_isolate_rdp_select() < 0) 3101da177e4SLinus Torvalds return -1; 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds while (1) { 3131da177e4SLinus Torvalds for (i = 1; i <= 64; i++) { 3141da177e4SLinus Torvalds data = read_data() << 8; 3151da177e4SLinus Torvalds udelay(250); 3161da177e4SLinus Torvalds data = data | read_data(); 3171da177e4SLinus Torvalds udelay(250); 3181da177e4SLinus Torvalds if (data == 0x55aa) 3191da177e4SLinus Torvalds bit = 0x01; 3209dd78466SBjorn Helgaas checksum = 3219dd78466SBjorn Helgaas ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) 3229dd78466SBjorn Helgaas | (checksum >> 1); 3231da177e4SLinus Torvalds bit = 0x00; 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds for (i = 65; i <= 72; i++) { 3261da177e4SLinus Torvalds data = read_data() << 8; 3271da177e4SLinus Torvalds udelay(250); 3281da177e4SLinus Torvalds data = data | read_data(); 3291da177e4SLinus Torvalds udelay(250); 3301da177e4SLinus Torvalds if (data == 0x55aa) 3311da177e4SLinus Torvalds chksum |= (1 << (i - 65)); 3321da177e4SLinus Torvalds } 3331da177e4SLinus Torvalds if (checksum != 0x00 && checksum == chksum) { 3341da177e4SLinus Torvalds csn++; 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds isapnp_write_byte(0x06, csn); 3371da177e4SLinus Torvalds udelay(250); 3381da177e4SLinus Torvalds iteration++; 3391da177e4SLinus Torvalds isapnp_wake(0x00); 3401da177e4SLinus Torvalds isapnp_set_rdp(); 3411da177e4SLinus Torvalds udelay(1000); 3421da177e4SLinus Torvalds write_address(0x01); 3431da177e4SLinus Torvalds udelay(1000); 3441da177e4SLinus Torvalds goto __next; 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds if (iteration == 1) { 3471da177e4SLinus Torvalds isapnp_rdp += RDP_STEP; 3481da177e4SLinus Torvalds if (isapnp_isolate_rdp_select() < 0) 3491da177e4SLinus Torvalds return -1; 3501da177e4SLinus Torvalds } else if (iteration > 1) { 3511da177e4SLinus Torvalds break; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds __next: 3541da177e4SLinus Torvalds if (csn == 255) 3551da177e4SLinus Torvalds break; 3561da177e4SLinus Torvalds checksum = 0x6a; 3571da177e4SLinus Torvalds chksum = 0x00; 3581da177e4SLinus Torvalds bit = 0x00; 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds isapnp_wait(); 3611da177e4SLinus Torvalds isapnp_csn_count = csn; 3621da177e4SLinus Torvalds return csn; 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds /* 3661da177e4SLinus Torvalds * Read one tag from stream. 3671da177e4SLinus Torvalds */ 3681da177e4SLinus Torvalds static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) 3691da177e4SLinus Torvalds { 3701da177e4SLinus Torvalds unsigned char tag, tmp[2]; 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds isapnp_peek(&tag, 1); 3731da177e4SLinus Torvalds if (tag == 0) /* invalid tag */ 3741da177e4SLinus Torvalds return -1; 3751da177e4SLinus Torvalds if (tag & 0x80) { /* large item */ 3761da177e4SLinus Torvalds *type = tag; 3771da177e4SLinus Torvalds isapnp_peek(tmp, 2); 3781da177e4SLinus Torvalds *size = (tmp[1] << 8) | tmp[0]; 3791da177e4SLinus Torvalds } else { 3801da177e4SLinus Torvalds *type = (tag >> 3) & 0x0f; 3811da177e4SLinus Torvalds *size = tag & 0x07; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds #if 0 3849dd78466SBjorn Helgaas printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, 3859dd78466SBjorn Helgaas *size); 3861da177e4SLinus Torvalds #endif 3871da177e4SLinus Torvalds if (*type == 0xff && *size == 0xffff) /* probably invalid data */ 3881da177e4SLinus Torvalds return -1; 3891da177e4SLinus Torvalds return 0; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds /* 3931da177e4SLinus Torvalds * Skip specified number of bytes from stream. 3941da177e4SLinus Torvalds */ 3951da177e4SLinus Torvalds static void __init isapnp_skip_bytes(int count) 3961da177e4SLinus Torvalds { 3971da177e4SLinus Torvalds isapnp_peek(NULL, count); 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds /* 4011da177e4SLinus Torvalds * Parse logical device tag. 4021da177e4SLinus Torvalds */ 4039dd78466SBjorn Helgaas static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card, 4049dd78466SBjorn Helgaas int size, int number) 4051da177e4SLinus Torvalds { 4061da177e4SLinus Torvalds unsigned char tmp[6]; 4071da177e4SLinus Torvalds struct pnp_dev *dev; 40825eb8461SBjorn Helgaas u32 eisa_id; 40925eb8461SBjorn Helgaas char id[8]; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds isapnp_peek(tmp, size); 41225eb8461SBjorn Helgaas eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24; 41325eb8461SBjorn Helgaas pnp_eisa_id_to_string(eisa_id, id); 414bda1e4e5SBjorn Helgaas 415bda1e4e5SBjorn Helgaas dev = pnp_alloc_dev(&isapnp_protocol, number, id); 416bda1e4e5SBjorn Helgaas if (!dev) 417bda1e4e5SBjorn Helgaas return NULL; 418bda1e4e5SBjorn Helgaas 4191da177e4SLinus Torvalds dev->card = card; 4201da177e4SLinus Torvalds dev->capabilities |= PNP_CONFIGURABLE; 4211da177e4SLinus Torvalds dev->capabilities |= PNP_READ; 4221da177e4SLinus Torvalds dev->capabilities |= PNP_WRITE; 4231da177e4SLinus Torvalds dev->capabilities |= PNP_DISABLE; 424f4490002SBjorn Helgaas pnp_init_resources(dev); 4251da177e4SLinus Torvalds return dev; 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds /* 4291da177e4SLinus Torvalds * Add IRQ resource to resources list. 4301da177e4SLinus Torvalds */ 431c1caf06cSBjorn Helgaas static void __init isapnp_parse_irq_resource(struct pnp_dev *dev, 4321f32ca31SBjorn Helgaas unsigned int option_flags, 4331da177e4SLinus Torvalds int size) 4341da177e4SLinus Torvalds { 4351da177e4SLinus Torvalds unsigned char tmp[3]; 4361da177e4SLinus Torvalds unsigned long bits; 437c227536bSBjorn Helgaas pnp_irq_mask_t map; 438c227536bSBjorn Helgaas unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds isapnp_peek(tmp, size); 4411da177e4SLinus Torvalds bits = (tmp[1] << 8) | tmp[0]; 442c227536bSBjorn Helgaas 443c227536bSBjorn Helgaas bitmap_zero(map.bits, PNP_IRQ_NR); 444c227536bSBjorn Helgaas bitmap_copy(map.bits, &bits, 16); 445c227536bSBjorn Helgaas 4461da177e4SLinus Torvalds if (size > 2) 447c227536bSBjorn Helgaas flags = tmp[2]; 448c227536bSBjorn Helgaas 4491f32ca31SBjorn Helgaas pnp_register_irq_resource(dev, option_flags, &map, flags); 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds /* 4531da177e4SLinus Torvalds * Add DMA resource to resources list. 4541da177e4SLinus Torvalds */ 455c1caf06cSBjorn Helgaas static void __init isapnp_parse_dma_resource(struct pnp_dev *dev, 4561f32ca31SBjorn Helgaas unsigned int option_flags, 4571da177e4SLinus Torvalds int size) 4581da177e4SLinus Torvalds { 4591da177e4SLinus Torvalds unsigned char tmp[2]; 4601da177e4SLinus Torvalds 4611da177e4SLinus Torvalds isapnp_peek(tmp, size); 4621f32ca31SBjorn Helgaas pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]); 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds /* 4661da177e4SLinus Torvalds * Add port resource to resources list. 4671da177e4SLinus Torvalds */ 468c1caf06cSBjorn Helgaas static void __init isapnp_parse_port_resource(struct pnp_dev *dev, 4691f32ca31SBjorn Helgaas unsigned int option_flags, 4701da177e4SLinus Torvalds int size) 4711da177e4SLinus Torvalds { 4721da177e4SLinus Torvalds unsigned char tmp[7]; 473c227536bSBjorn Helgaas resource_size_t min, max, align, len; 474c227536bSBjorn Helgaas unsigned char flags; 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds isapnp_peek(tmp, size); 477c227536bSBjorn Helgaas min = (tmp[2] << 8) | tmp[1]; 478c227536bSBjorn Helgaas max = (tmp[4] << 8) | tmp[3]; 479c227536bSBjorn Helgaas align = tmp[5]; 480c227536bSBjorn Helgaas len = tmp[6]; 481c227536bSBjorn Helgaas flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0; 4821f32ca31SBjorn Helgaas pnp_register_port_resource(dev, option_flags, 4831f32ca31SBjorn Helgaas min, max, align, len, flags); 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds 4861da177e4SLinus Torvalds /* 4871da177e4SLinus Torvalds * Add fixed port resource to resources list. 4881da177e4SLinus Torvalds */ 489c1caf06cSBjorn Helgaas static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev, 4901f32ca31SBjorn Helgaas unsigned int option_flags, 4911da177e4SLinus Torvalds int size) 4921da177e4SLinus Torvalds { 4931da177e4SLinus Torvalds unsigned char tmp[3]; 494c227536bSBjorn Helgaas resource_size_t base, len; 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvalds isapnp_peek(tmp, size); 497c227536bSBjorn Helgaas base = (tmp[1] << 8) | tmp[0]; 498c227536bSBjorn Helgaas len = tmp[2]; 4991f32ca31SBjorn Helgaas pnp_register_port_resource(dev, option_flags, base, base, 0, len, 500c227536bSBjorn Helgaas IORESOURCE_IO_FIXED); 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds /* 5041da177e4SLinus Torvalds * Add memory resource to resources list. 5051da177e4SLinus Torvalds */ 506c1caf06cSBjorn Helgaas static void __init isapnp_parse_mem_resource(struct pnp_dev *dev, 5071f32ca31SBjorn Helgaas unsigned int option_flags, 5081da177e4SLinus Torvalds int size) 5091da177e4SLinus Torvalds { 5101da177e4SLinus Torvalds unsigned char tmp[9]; 511c227536bSBjorn Helgaas resource_size_t min, max, align, len; 512c227536bSBjorn Helgaas unsigned char flags; 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds isapnp_peek(tmp, size); 515c227536bSBjorn Helgaas min = ((tmp[2] << 8) | tmp[1]) << 8; 516c227536bSBjorn Helgaas max = ((tmp[4] << 8) | tmp[3]) << 8; 517c227536bSBjorn Helgaas align = (tmp[6] << 8) | tmp[5]; 518c227536bSBjorn Helgaas len = ((tmp[8] << 8) | tmp[7]) << 8; 519c227536bSBjorn Helgaas flags = tmp[0]; 5201f32ca31SBjorn Helgaas pnp_register_mem_resource(dev, option_flags, 5211f32ca31SBjorn Helgaas min, max, align, len, flags); 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds /* 5251da177e4SLinus Torvalds * Add 32-bit memory resource to resources list. 5261da177e4SLinus Torvalds */ 527c1caf06cSBjorn Helgaas static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev, 5281f32ca31SBjorn Helgaas unsigned int option_flags, 5291da177e4SLinus Torvalds int size) 5301da177e4SLinus Torvalds { 5311da177e4SLinus Torvalds unsigned char tmp[17]; 532c227536bSBjorn Helgaas resource_size_t min, max, align, len; 533c227536bSBjorn Helgaas unsigned char flags; 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds isapnp_peek(tmp, size); 536c227536bSBjorn Helgaas min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; 537c227536bSBjorn Helgaas max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; 538c227536bSBjorn Helgaas align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; 539c227536bSBjorn Helgaas len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; 540c227536bSBjorn Helgaas flags = tmp[0]; 5411f32ca31SBjorn Helgaas pnp_register_mem_resource(dev, option_flags, 5421f32ca31SBjorn Helgaas min, max, align, len, flags); 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds /* 5461da177e4SLinus Torvalds * Add 32-bit fixed memory resource to resources list. 5471da177e4SLinus Torvalds */ 548c1caf06cSBjorn Helgaas static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev, 5491f32ca31SBjorn Helgaas unsigned int option_flags, 5501da177e4SLinus Torvalds int size) 5511da177e4SLinus Torvalds { 5521da177e4SLinus Torvalds unsigned char tmp[9]; 553c227536bSBjorn Helgaas resource_size_t base, len; 554c227536bSBjorn Helgaas unsigned char flags; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds isapnp_peek(tmp, size); 557c227536bSBjorn Helgaas base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; 558c227536bSBjorn Helgaas len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; 559c227536bSBjorn Helgaas flags = tmp[0]; 5601f32ca31SBjorn Helgaas pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds /* 5641da177e4SLinus Torvalds * Parse card name for ISA PnP device. 5651da177e4SLinus Torvalds */ 5661da177e4SLinus Torvalds static void __init 5671da177e4SLinus Torvalds isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) 5681da177e4SLinus Torvalds { 5691da177e4SLinus Torvalds if (name[0] == '\0') { 5709dd78466SBjorn Helgaas unsigned short size1 = 5719dd78466SBjorn Helgaas *size >= name_max ? (name_max - 1) : *size; 5721da177e4SLinus Torvalds isapnp_peek(name, size1); 5731da177e4SLinus Torvalds name[size1] = '\0'; 5741da177e4SLinus Torvalds *size -= size1; 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds /* clean whitespace from end of string */ 5771da177e4SLinus Torvalds while (size1 > 0 && name[--size1] == ' ') 5781da177e4SLinus Torvalds name[size1] = '\0'; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds /* 5831da177e4SLinus Torvalds * Parse resource map for logical device. 5841da177e4SLinus Torvalds */ 5851da177e4SLinus Torvalds static int __init isapnp_create_device(struct pnp_card *card, 5861da177e4SLinus Torvalds unsigned short size) 5871da177e4SLinus Torvalds { 588e2a1a6f1SBjorn Helgaas int number = 0, skip = 0, priority, compat = 0; 5891da177e4SLinus Torvalds unsigned char type, tmp[17]; 5901f32ca31SBjorn Helgaas unsigned int option_flags; 5911da177e4SLinus Torvalds struct pnp_dev *dev; 59225eb8461SBjorn Helgaas u32 eisa_id; 59325eb8461SBjorn Helgaas char id[8]; 59407d4e9afSBjorn Helgaas 5951da177e4SLinus Torvalds if ((dev = isapnp_parse_device(card, size, number++)) == NULL) 5961da177e4SLinus Torvalds return 1; 5971f32ca31SBjorn Helgaas option_flags = 0; 5981da177e4SLinus Torvalds pnp_add_card_device(card, dev); 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds while (1) { 6011da177e4SLinus Torvalds if (isapnp_read_tag(&type, &size) < 0) 6021da177e4SLinus Torvalds return 1; 6031da177e4SLinus Torvalds if (skip && type != _STAG_LOGDEVID && type != _STAG_END) 6041da177e4SLinus Torvalds goto __skip; 6051da177e4SLinus Torvalds switch (type) { 6061da177e4SLinus Torvalds case _STAG_LOGDEVID: 6071da177e4SLinus Torvalds if (size >= 5 && size <= 6) { 6089dd78466SBjorn Helgaas if ((dev = 6099dd78466SBjorn Helgaas isapnp_parse_device(card, size, 6109dd78466SBjorn Helgaas number++)) == NULL) 6111da177e4SLinus Torvalds return 1; 6121da177e4SLinus Torvalds size = 0; 6131da177e4SLinus Torvalds skip = 0; 6141f32ca31SBjorn Helgaas option_flags = 0; 6151da177e4SLinus Torvalds pnp_add_card_device(card, dev); 6161da177e4SLinus Torvalds } else { 6171da177e4SLinus Torvalds skip = 1; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds compat = 0; 6201da177e4SLinus Torvalds break; 6211da177e4SLinus Torvalds case _STAG_COMPATDEVID: 6221da177e4SLinus Torvalds if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { 6231da177e4SLinus Torvalds isapnp_peek(tmp, 4); 62425eb8461SBjorn Helgaas eisa_id = tmp[0] | tmp[1] << 8 | 62525eb8461SBjorn Helgaas tmp[2] << 16 | tmp[3] << 24; 62625eb8461SBjorn Helgaas pnp_eisa_id_to_string(eisa_id, id); 62725eb8461SBjorn Helgaas pnp_add_id(dev, id); 6281da177e4SLinus Torvalds compat++; 6291da177e4SLinus Torvalds size = 0; 6301da177e4SLinus Torvalds } 6311da177e4SLinus Torvalds break; 6321da177e4SLinus Torvalds case _STAG_IRQ: 6331da177e4SLinus Torvalds if (size < 2 || size > 3) 6341da177e4SLinus Torvalds goto __skip; 6351f32ca31SBjorn Helgaas isapnp_parse_irq_resource(dev, option_flags, size); 6361da177e4SLinus Torvalds size = 0; 6371da177e4SLinus Torvalds break; 6381da177e4SLinus Torvalds case _STAG_DMA: 6391da177e4SLinus Torvalds if (size != 2) 6401da177e4SLinus Torvalds goto __skip; 6411f32ca31SBjorn Helgaas isapnp_parse_dma_resource(dev, option_flags, size); 6421da177e4SLinus Torvalds size = 0; 6431da177e4SLinus Torvalds break; 6441da177e4SLinus Torvalds case _STAG_STARTDEP: 6451da177e4SLinus Torvalds if (size > 1) 6461da177e4SLinus Torvalds goto __skip; 647e2a1a6f1SBjorn Helgaas priority = PNP_RES_PRIORITY_ACCEPTABLE; 6481da177e4SLinus Torvalds if (size > 0) { 6491da177e4SLinus Torvalds isapnp_peek(tmp, size); 650e2a1a6f1SBjorn Helgaas priority = tmp[0]; 6511da177e4SLinus Torvalds size = 0; 6521da177e4SLinus Torvalds } 6531f32ca31SBjorn Helgaas option_flags = pnp_new_dependent_set(dev, priority); 6541da177e4SLinus Torvalds break; 6551da177e4SLinus Torvalds case _STAG_ENDDEP: 6561da177e4SLinus Torvalds if (size != 0) 6571da177e4SLinus Torvalds goto __skip; 6581f32ca31SBjorn Helgaas option_flags = 0; 6591da177e4SLinus Torvalds break; 6601da177e4SLinus Torvalds case _STAG_IOPORT: 6611da177e4SLinus Torvalds if (size != 7) 6621da177e4SLinus Torvalds goto __skip; 6631f32ca31SBjorn Helgaas isapnp_parse_port_resource(dev, option_flags, size); 6641da177e4SLinus Torvalds size = 0; 6651da177e4SLinus Torvalds break; 6661da177e4SLinus Torvalds case _STAG_FIXEDIO: 6671da177e4SLinus Torvalds if (size != 3) 6681da177e4SLinus Torvalds goto __skip; 6691f32ca31SBjorn Helgaas isapnp_parse_fixed_port_resource(dev, option_flags, 6701f32ca31SBjorn Helgaas size); 6711da177e4SLinus Torvalds size = 0; 6721da177e4SLinus Torvalds break; 6731da177e4SLinus Torvalds case _STAG_VENDOR: 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case _LTAG_MEMRANGE: 6761da177e4SLinus Torvalds if (size != 9) 6771da177e4SLinus Torvalds goto __skip; 6781f32ca31SBjorn Helgaas isapnp_parse_mem_resource(dev, option_flags, size); 6791da177e4SLinus Torvalds size = 0; 6801da177e4SLinus Torvalds break; 6811da177e4SLinus Torvalds case _LTAG_ANSISTR: 6821da177e4SLinus Torvalds isapnp_parse_name(dev->name, sizeof(dev->name), &size); 6831da177e4SLinus Torvalds break; 6841da177e4SLinus Torvalds case _LTAG_UNICODESTR: 6851da177e4SLinus Torvalds /* silently ignore */ 6861da177e4SLinus Torvalds /* who use unicode for hardware identification? */ 6871da177e4SLinus Torvalds break; 6881da177e4SLinus Torvalds case _LTAG_VENDOR: 6891da177e4SLinus Torvalds break; 6901da177e4SLinus Torvalds case _LTAG_MEM32RANGE: 6911da177e4SLinus Torvalds if (size != 17) 6921da177e4SLinus Torvalds goto __skip; 6931f32ca31SBjorn Helgaas isapnp_parse_mem32_resource(dev, option_flags, size); 6941da177e4SLinus Torvalds size = 0; 6951da177e4SLinus Torvalds break; 6961da177e4SLinus Torvalds case _LTAG_FIXEDMEM32RANGE: 6971da177e4SLinus Torvalds if (size != 9) 6981da177e4SLinus Torvalds goto __skip; 6991f32ca31SBjorn Helgaas isapnp_parse_fixed_mem32_resource(dev, option_flags, 7001f32ca31SBjorn Helgaas size); 7011da177e4SLinus Torvalds size = 0; 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds case _STAG_END: 7041da177e4SLinus Torvalds if (size > 0) 7051da177e4SLinus Torvalds isapnp_skip_bytes(size); 7061da177e4SLinus Torvalds return 1; 7071da177e4SLinus Torvalds default: 708af11cb2dSBjorn Helgaas dev_err(&dev->dev, "unknown tag %#x (card %i), " 709af11cb2dSBjorn Helgaas "ignored\n", type, card->number); 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds __skip: 7121da177e4SLinus Torvalds if (size > 0) 7131da177e4SLinus Torvalds isapnp_skip_bytes(size); 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds return 0; 7161da177e4SLinus Torvalds } 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds /* 7191da177e4SLinus Torvalds * Parse resource map for ISA PnP card. 7201da177e4SLinus Torvalds */ 7211da177e4SLinus Torvalds static void __init isapnp_parse_resource_map(struct pnp_card *card) 7221da177e4SLinus Torvalds { 7231da177e4SLinus Torvalds unsigned char type, tmp[17]; 7241da177e4SLinus Torvalds unsigned short size; 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds while (1) { 7271da177e4SLinus Torvalds if (isapnp_read_tag(&type, &size) < 0) 7281da177e4SLinus Torvalds return; 7291da177e4SLinus Torvalds switch (type) { 7301da177e4SLinus Torvalds case _STAG_PNPVERNO: 7311da177e4SLinus Torvalds if (size != 2) 7321da177e4SLinus Torvalds goto __skip; 7331da177e4SLinus Torvalds isapnp_peek(tmp, 2); 7341da177e4SLinus Torvalds card->pnpver = tmp[0]; 7351da177e4SLinus Torvalds card->productver = tmp[1]; 7361da177e4SLinus Torvalds size = 0; 7371da177e4SLinus Torvalds break; 7381da177e4SLinus Torvalds case _STAG_LOGDEVID: 7391da177e4SLinus Torvalds if (size >= 5 && size <= 6) { 7401da177e4SLinus Torvalds if (isapnp_create_device(card, size) == 1) 7411da177e4SLinus Torvalds return; 7421da177e4SLinus Torvalds size = 0; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds break; 7451da177e4SLinus Torvalds case _STAG_VENDOR: 7461da177e4SLinus Torvalds break; 7471da177e4SLinus Torvalds case _LTAG_ANSISTR: 7489dd78466SBjorn Helgaas isapnp_parse_name(card->name, sizeof(card->name), 7499dd78466SBjorn Helgaas &size); 7501da177e4SLinus Torvalds break; 7511da177e4SLinus Torvalds case _LTAG_UNICODESTR: 7521da177e4SLinus Torvalds /* silently ignore */ 7531da177e4SLinus Torvalds /* who use unicode for hardware identification? */ 7541da177e4SLinus Torvalds break; 7551da177e4SLinus Torvalds case _LTAG_VENDOR: 7561da177e4SLinus Torvalds break; 7571da177e4SLinus Torvalds case _STAG_END: 7581da177e4SLinus Torvalds if (size > 0) 7591da177e4SLinus Torvalds isapnp_skip_bytes(size); 7601da177e4SLinus Torvalds return; 7611da177e4SLinus Torvalds default: 762af11cb2dSBjorn Helgaas dev_err(&card->dev, "unknown tag %#x, ignored\n", 763af11cb2dSBjorn Helgaas type); 7641da177e4SLinus Torvalds } 7651da177e4SLinus Torvalds __skip: 7661da177e4SLinus Torvalds if (size > 0) 7671da177e4SLinus Torvalds isapnp_skip_bytes(size); 7681da177e4SLinus Torvalds } 7691da177e4SLinus Torvalds } 7701da177e4SLinus Torvalds 7711da177e4SLinus Torvalds /* 7721da177e4SLinus Torvalds * Compute ISA PnP checksum for first eight bytes. 7731da177e4SLinus Torvalds */ 7741da177e4SLinus Torvalds static unsigned char __init isapnp_checksum(unsigned char *data) 7751da177e4SLinus Torvalds { 7761da177e4SLinus Torvalds int i, j; 7771da177e4SLinus Torvalds unsigned char checksum = 0x6a, bit, b; 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds for (i = 0; i < 8; i++) { 7801da177e4SLinus Torvalds b = data[i]; 7811da177e4SLinus Torvalds for (j = 0; j < 8; j++) { 7821da177e4SLinus Torvalds bit = 0; 7831da177e4SLinus Torvalds if (b & (1 << j)) 7841da177e4SLinus Torvalds bit = 1; 7859dd78466SBjorn Helgaas checksum = 7869dd78466SBjorn Helgaas ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) 7879dd78466SBjorn Helgaas | (checksum >> 1); 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds } 7901da177e4SLinus Torvalds return checksum; 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds /* 7941da177e4SLinus Torvalds * Build device list for all present ISA PnP devices. 7951da177e4SLinus Torvalds */ 7961da177e4SLinus Torvalds static int __init isapnp_build_device_list(void) 7971da177e4SLinus Torvalds { 7981da177e4SLinus Torvalds int csn; 7991da177e4SLinus Torvalds unsigned char header[9], checksum; 8001da177e4SLinus Torvalds struct pnp_card *card; 801068076d5SBjorn Helgaas u32 eisa_id; 802068076d5SBjorn Helgaas char id[8]; 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds isapnp_wait(); 8051da177e4SLinus Torvalds isapnp_key(); 8061da177e4SLinus Torvalds for (csn = 1; csn <= isapnp_csn_count; csn++) { 8071da177e4SLinus Torvalds isapnp_wake(csn); 8081da177e4SLinus Torvalds isapnp_peek(header, 9); 8091da177e4SLinus Torvalds checksum = isapnp_checksum(header); 810068076d5SBjorn Helgaas eisa_id = header[0] | header[1] << 8 | 811068076d5SBjorn Helgaas header[2] << 16 | header[3] << 24; 812068076d5SBjorn Helgaas pnp_eisa_id_to_string(eisa_id, id); 8136bf2aab2SBjorn Helgaas card = pnp_alloc_card(&isapnp_protocol, csn, id); 8146bf2aab2SBjorn Helgaas if (!card) 8156bf2aab2SBjorn Helgaas continue; 8166bf2aab2SBjorn Helgaas 817af11cb2dSBjorn Helgaas #if 0 818af11cb2dSBjorn Helgaas dev_info(&card->dev, 819af11cb2dSBjorn Helgaas "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", 820af11cb2dSBjorn Helgaas header[0], header[1], header[2], header[3], header[4], 821af11cb2dSBjorn Helgaas header[5], header[6], header[7], header[8]); 822af11cb2dSBjorn Helgaas dev_info(&card->dev, "checksum = %#x\n", checksum); 823af11cb2dSBjorn Helgaas #endif 8246bf2aab2SBjorn Helgaas INIT_LIST_HEAD(&card->devices); 8259dd78466SBjorn Helgaas card->serial = 8269dd78466SBjorn Helgaas (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | 8279dd78466SBjorn Helgaas header[4]; 8281da177e4SLinus Torvalds isapnp_checksum_value = 0x00; 8291da177e4SLinus Torvalds isapnp_parse_resource_map(card); 8301da177e4SLinus Torvalds if (isapnp_checksum_value != 0x00) 831af11cb2dSBjorn Helgaas dev_err(&card->dev, "invalid checksum %#x\n", 832af11cb2dSBjorn Helgaas isapnp_checksum_value); 8331da177e4SLinus Torvalds card->checksum = isapnp_checksum_value; 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds pnp_add_card(card); 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds isapnp_wait(); 8381da177e4SLinus Torvalds return 0; 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds /* 8421da177e4SLinus Torvalds * Basic configuration routines. 8431da177e4SLinus Torvalds */ 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvalds int isapnp_present(void) 8461da177e4SLinus Torvalds { 8471da177e4SLinus Torvalds struct pnp_card *card; 84807d4e9afSBjorn Helgaas 8491da177e4SLinus Torvalds pnp_for_each_card(card) { 8501da177e4SLinus Torvalds if (card->protocol == &isapnp_protocol) 8511da177e4SLinus Torvalds return 1; 8521da177e4SLinus Torvalds } 8531da177e4SLinus Torvalds return 0; 8541da177e4SLinus Torvalds } 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvalds int isapnp_cfg_begin(int csn, int logdev) 8571da177e4SLinus Torvalds { 8581da177e4SLinus Torvalds if (csn < 1 || csn > isapnp_csn_count || logdev > 10) 8591da177e4SLinus Torvalds return -EINVAL; 86014cc3e2bSIngo Molnar mutex_lock(&isapnp_cfg_mutex); 8611da177e4SLinus Torvalds isapnp_wait(); 8621da177e4SLinus Torvalds isapnp_key(); 8631da177e4SLinus Torvalds isapnp_wake(csn); 8641da177e4SLinus Torvalds #if 0 8651da177e4SLinus Torvalds /* to avoid malfunction when the isapnptools package is used */ 8661da177e4SLinus Torvalds /* we must set RDP to our value again */ 8671da177e4SLinus Torvalds /* it is possible to set RDP only in the isolation phase */ 8681da177e4SLinus Torvalds /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ 8691da177e4SLinus Torvalds isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ 8701da177e4SLinus Torvalds mdelay(2); /* is this necessary? */ 8711da177e4SLinus Torvalds isapnp_wake(csn); /* bring card into sleep state */ 8721da177e4SLinus Torvalds isapnp_wake(0); /* bring card into isolation state */ 8731da177e4SLinus Torvalds isapnp_set_rdp(); /* reset the RDP port */ 8741da177e4SLinus Torvalds udelay(1000); /* delay 1000us */ 8751da177e4SLinus Torvalds isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ 8761da177e4SLinus Torvalds udelay(250); /* is this necessary? */ 8771da177e4SLinus Torvalds #endif 8781da177e4SLinus Torvalds if (logdev >= 0) 8791da177e4SLinus Torvalds isapnp_device(logdev); 8801da177e4SLinus Torvalds return 0; 8811da177e4SLinus Torvalds } 8821da177e4SLinus Torvalds 8831da177e4SLinus Torvalds int isapnp_cfg_end(void) 8841da177e4SLinus Torvalds { 8851da177e4SLinus Torvalds isapnp_wait(); 88614cc3e2bSIngo Molnar mutex_unlock(&isapnp_cfg_mutex); 8871da177e4SLinus Torvalds return 0; 8881da177e4SLinus Torvalds } 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds /* 89107d4e9afSBjorn Helgaas * Initialization. 8921da177e4SLinus Torvalds */ 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds EXPORT_SYMBOL(isapnp_protocol); 8951da177e4SLinus Torvalds EXPORT_SYMBOL(isapnp_present); 8961da177e4SLinus Torvalds EXPORT_SYMBOL(isapnp_cfg_begin); 8971da177e4SLinus Torvalds EXPORT_SYMBOL(isapnp_cfg_end); 8981da177e4SLinus Torvalds EXPORT_SYMBOL(isapnp_write_byte); 8991da177e4SLinus Torvalds 90059284cb4SBjorn Helgaas static int isapnp_get_resources(struct pnp_dev *dev) 9011da177e4SLinus Torvalds { 90201115e7dSBjorn Helgaas int i, ret; 9031e0aa9adSBjorn Helgaas 9042f53432cSBjorn Helgaas pnp_dbg(&dev->dev, "get resources\n"); 905f4490002SBjorn Helgaas pnp_init_resources(dev); 9061da177e4SLinus Torvalds isapnp_cfg_begin(dev->card->number, dev->number); 90701115e7dSBjorn Helgaas dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); 90801115e7dSBjorn Helgaas if (!dev->active) 90901115e7dSBjorn Helgaas goto __end; 91001115e7dSBjorn Helgaas 91101115e7dSBjorn Helgaas for (i = 0; i < ISAPNP_MAX_PORT; i++) { 91201115e7dSBjorn Helgaas ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1)); 91387e4acf3SBjorn Helgaas pnp_add_io_resource(dev, ret, ret, 91487e4acf3SBjorn Helgaas ret == 0 ? IORESOURCE_DISABLED : 0); 91501115e7dSBjorn Helgaas } 91601115e7dSBjorn Helgaas for (i = 0; i < ISAPNP_MAX_MEM; i++) { 91701115e7dSBjorn Helgaas ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8; 91887e4acf3SBjorn Helgaas pnp_add_mem_resource(dev, ret, ret, 91987e4acf3SBjorn Helgaas ret == 0 ? IORESOURCE_DISABLED : 0); 92001115e7dSBjorn Helgaas } 92101115e7dSBjorn Helgaas for (i = 0; i < ISAPNP_MAX_IRQ; i++) { 92201115e7dSBjorn Helgaas ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8; 92387e4acf3SBjorn Helgaas pnp_add_irq_resource(dev, ret, 92487e4acf3SBjorn Helgaas ret == 0 ? IORESOURCE_DISABLED : 0); 92501115e7dSBjorn Helgaas } 92601115e7dSBjorn Helgaas for (i = 0; i < ISAPNP_MAX_DMA; i++) { 92701115e7dSBjorn Helgaas ret = isapnp_read_byte(ISAPNP_CFG_DMA + i); 92887e4acf3SBjorn Helgaas pnp_add_dma_resource(dev, ret, 92987e4acf3SBjorn Helgaas ret == 4 ? IORESOURCE_DISABLED : 0); 93001115e7dSBjorn Helgaas } 93101115e7dSBjorn Helgaas 93201115e7dSBjorn Helgaas __end: 9331da177e4SLinus Torvalds isapnp_cfg_end(); 93401115e7dSBjorn Helgaas return 0; 9351da177e4SLinus Torvalds } 9361da177e4SLinus Torvalds 93759284cb4SBjorn Helgaas static int isapnp_set_resources(struct pnp_dev *dev) 9381da177e4SLinus Torvalds { 93906cb58a6SBjorn Helgaas struct resource *res; 94087e4acf3SBjorn Helgaas int tmp; 9411da177e4SLinus Torvalds 9422f53432cSBjorn Helgaas pnp_dbg(&dev->dev, "set resources\n"); 9431da177e4SLinus Torvalds isapnp_cfg_begin(dev->card->number, dev->number); 9441da177e4SLinus Torvalds dev->active = 1; 94506cb58a6SBjorn Helgaas for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) { 94687e4acf3SBjorn Helgaas res = pnp_get_resource(dev, IORESOURCE_IO, tmp); 947aee3ad81SBjorn Helgaas if (pnp_resource_enabled(res)) { 9482f53432cSBjorn Helgaas pnp_dbg(&dev->dev, " set io %d to %#llx\n", 94987e4acf3SBjorn Helgaas tmp, (unsigned long long) res->start); 95087e4acf3SBjorn Helgaas isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1), 95106cb58a6SBjorn Helgaas res->start); 95272dcc883SBjorn Helgaas } 95306cb58a6SBjorn Helgaas } 95406cb58a6SBjorn Helgaas for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) { 95587e4acf3SBjorn Helgaas res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp); 956aee3ad81SBjorn Helgaas if (pnp_resource_enabled(res)) { 95706cb58a6SBjorn Helgaas int irq = res->start; 9581da177e4SLinus Torvalds if (irq == 2) 9591da177e4SLinus Torvalds irq = 9; 9602f53432cSBjorn Helgaas pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq); 96187e4acf3SBjorn Helgaas isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq); 9621da177e4SLinus Torvalds } 96372dcc883SBjorn Helgaas } 96406cb58a6SBjorn Helgaas for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) { 96587e4acf3SBjorn Helgaas res = pnp_get_resource(dev, IORESOURCE_DMA, tmp); 966aee3ad81SBjorn Helgaas if (pnp_resource_enabled(res)) { 9672f53432cSBjorn Helgaas pnp_dbg(&dev->dev, " set dma %d to %lld\n", 96887e4acf3SBjorn Helgaas tmp, (unsigned long long) res->start); 96987e4acf3SBjorn Helgaas isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start); 97006cb58a6SBjorn Helgaas } 97106cb58a6SBjorn Helgaas } 97206cb58a6SBjorn Helgaas for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) { 97387e4acf3SBjorn Helgaas res = pnp_get_resource(dev, IORESOURCE_MEM, tmp); 974aee3ad81SBjorn Helgaas if (pnp_resource_enabled(res)) { 9752f53432cSBjorn Helgaas pnp_dbg(&dev->dev, " set mem %d to %#llx\n", 97687e4acf3SBjorn Helgaas tmp, (unsigned long long) res->start); 97787e4acf3SBjorn Helgaas isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3), 97806cb58a6SBjorn Helgaas (res->start >> 8) & 0xffff); 97906cb58a6SBjorn Helgaas } 98072dcc883SBjorn Helgaas } 9811da177e4SLinus Torvalds /* FIXME: We aren't handling 32bit mems properly here */ 9821da177e4SLinus Torvalds isapnp_activate(dev->number); 9831da177e4SLinus Torvalds isapnp_cfg_end(); 9841da177e4SLinus Torvalds return 0; 9851da177e4SLinus Torvalds } 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds static int isapnp_disable_resources(struct pnp_dev *dev) 9881da177e4SLinus Torvalds { 989b1734913SBjorn Helgaas if (!dev->active) 9901da177e4SLinus Torvalds return -EINVAL; 9911da177e4SLinus Torvalds isapnp_cfg_begin(dev->card->number, dev->number); 9921da177e4SLinus Torvalds isapnp_deactivate(dev->number); 9931da177e4SLinus Torvalds dev->active = 0; 9941da177e4SLinus Torvalds isapnp_cfg_end(); 9951da177e4SLinus Torvalds return 0; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds struct pnp_protocol isapnp_protocol = { 9991da177e4SLinus Torvalds .name = "ISA Plug and Play", 10001da177e4SLinus Torvalds .get = isapnp_get_resources, 10011da177e4SLinus Torvalds .set = isapnp_set_resources, 10021da177e4SLinus Torvalds .disable = isapnp_disable_resources, 10031da177e4SLinus Torvalds }; 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds static int __init isapnp_init(void) 10061da177e4SLinus Torvalds { 10071da177e4SLinus Torvalds int cards; 10081da177e4SLinus Torvalds struct pnp_card *card; 10091da177e4SLinus Torvalds struct pnp_dev *dev; 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds if (isapnp_disable) { 10121da177e4SLinus Torvalds printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); 10131da177e4SLinus Torvalds return 0; 10141da177e4SLinus Torvalds } 101507bd1c4aSDavid Woodhouse #ifdef CONFIG_PPC_MERGE 101607bd1c4aSDavid Woodhouse if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) 101707bd1c4aSDavid Woodhouse return -EINVAL; 101807bd1c4aSDavid Woodhouse #endif 10191da177e4SLinus Torvalds #ifdef ISAPNP_REGION_OK 10201da177e4SLinus Torvalds if (!request_region(_PIDXR, 1, "isapnp index")) { 10219dd78466SBjorn Helgaas printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", 10229dd78466SBjorn Helgaas _PIDXR); 10231da177e4SLinus Torvalds return -EBUSY; 10241da177e4SLinus Torvalds } 10251da177e4SLinus Torvalds #endif 10261da177e4SLinus Torvalds if (!request_region(_PNPWRP, 1, "isapnp write")) { 10279dd78466SBjorn Helgaas printk(KERN_ERR 10289dd78466SBjorn Helgaas "isapnp: Write Data Register 0x%x already used\n", 10299dd78466SBjorn Helgaas _PNPWRP); 10301da177e4SLinus Torvalds #ifdef ISAPNP_REGION_OK 10311da177e4SLinus Torvalds release_region(_PIDXR, 1); 10321da177e4SLinus Torvalds #endif 10331da177e4SLinus Torvalds return -EBUSY; 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds if (pnp_register_protocol(&isapnp_protocol) < 0) 10371da177e4SLinus Torvalds return -EBUSY; 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds /* 10401da177e4SLinus Torvalds * Print a message. The existing ISAPnP code is hanging machines 10411da177e4SLinus Torvalds * so let the user know where. 10421da177e4SLinus Torvalds */ 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); 10451da177e4SLinus Torvalds if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { 10461da177e4SLinus Torvalds isapnp_rdp |= 3; 10471da177e4SLinus Torvalds if (!request_region(isapnp_rdp, 1, "isapnp read")) { 10489dd78466SBjorn Helgaas printk(KERN_ERR 10499dd78466SBjorn Helgaas "isapnp: Read Data Register 0x%x already used\n", 10509dd78466SBjorn Helgaas isapnp_rdp); 10511da177e4SLinus Torvalds #ifdef ISAPNP_REGION_OK 10521da177e4SLinus Torvalds release_region(_PIDXR, 1); 10531da177e4SLinus Torvalds #endif 10541da177e4SLinus Torvalds release_region(_PNPWRP, 1); 10551da177e4SLinus Torvalds return -EBUSY; 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds isapnp_set_rdp(); 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { 10601da177e4SLinus Torvalds cards = isapnp_isolate(); 10619dd78466SBjorn Helgaas if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { 10621da177e4SLinus Torvalds #ifdef ISAPNP_REGION_OK 10631da177e4SLinus Torvalds release_region(_PIDXR, 1); 10641da177e4SLinus Torvalds #endif 10651da177e4SLinus Torvalds release_region(_PNPWRP, 1); 10669dd78466SBjorn Helgaas printk(KERN_INFO 10679dd78466SBjorn Helgaas "isapnp: No Plug & Play device found\n"); 10681da177e4SLinus Torvalds return 0; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds request_region(isapnp_rdp, 1, "isapnp read"); 10711da177e4SLinus Torvalds } 10721da177e4SLinus Torvalds isapnp_build_device_list(); 10731da177e4SLinus Torvalds cards = 0; 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds protocol_for_each_card(&isapnp_protocol, card) { 10761da177e4SLinus Torvalds cards++; 10771da177e4SLinus Torvalds if (isapnp_verbose) { 1078af11cb2dSBjorn Helgaas dev_info(&card->dev, "card '%s'\n", 1079af11cb2dSBjorn Helgaas card->name[0] ? card->name : "unknown"); 10801da177e4SLinus Torvalds if (isapnp_verbose < 2) 10811da177e4SLinus Torvalds continue; 10821da177e4SLinus Torvalds card_for_each_dev(card, dev) { 1083af11cb2dSBjorn Helgaas dev_info(&card->dev, "device '%s'\n", 1084af11cb2dSBjorn Helgaas dev->name[0] ? dev->name : "unknown"); 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds } 10881e0aa9adSBjorn Helgaas if (cards) 10899dd78466SBjorn Helgaas printk(KERN_INFO 10909dd78466SBjorn Helgaas "isapnp: %i Plug & Play card%s detected total\n", cards, 10919dd78466SBjorn Helgaas cards > 1 ? "s" : ""); 10921e0aa9adSBjorn Helgaas else 10931da177e4SLinus Torvalds printk(KERN_INFO "isapnp: No Plug & Play card found\n"); 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds isapnp_proc_init(); 10961da177e4SLinus Torvalds return 0; 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds device_initcall(isapnp_init); 11001da177e4SLinus Torvalds 11011da177e4SLinus Torvalds /* format is: noisapnp */ 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds static int __init isapnp_setup_disable(char *str) 11041da177e4SLinus Torvalds { 11051da177e4SLinus Torvalds isapnp_disable = 1; 11061da177e4SLinus Torvalds return 1; 11071da177e4SLinus Torvalds } 11081da177e4SLinus Torvalds 11091da177e4SLinus Torvalds __setup("noisapnp", isapnp_setup_disable); 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds /* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ 11121da177e4SLinus Torvalds 11131da177e4SLinus Torvalds static int __init isapnp_setup_isapnp(char *str) 11141da177e4SLinus Torvalds { 11151da177e4SLinus Torvalds (void)((get_option(&str, &isapnp_rdp) == 2) && 11161da177e4SLinus Torvalds (get_option(&str, &isapnp_reset) == 2) && 11171da177e4SLinus Torvalds (get_option(&str, &isapnp_verbose) == 2)); 11181da177e4SLinus Torvalds return 1; 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds __setup("isapnp=", isapnp_setup_isapnp); 1122