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1156 lines
27 KiB
1156 lines
27 KiB
/*
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* ISA Plug & Play support
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Changelog:
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* 2000-01-01 Added quirks handling for buggy hardware
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* Peter Denison <peterd@pnd-pc.demon.co.uk>
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* 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev()
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* Christoph Hellwig <hch@infradead.org>
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* 2001-06-03 Added release_region calls to correspond with
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* request_region calls when a failure occurs. Also
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* added KERN_* constants to printk() calls.
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* 2001-11-07 Added isapnp_{,un}register_driver calls along the lines
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* of the pci driver interface
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* Kai Germaschewski <kai.germaschewski@gmx.de>
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* 2002-06-06 Made the use of dma channel 0 configurable
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* Gerald Teschl <gerald.teschl@univie.ac.at>
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* 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com>
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* 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com>
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/isapnp.h>
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#include <asm/io.h>
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#if 0
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#define ISAPNP_REGION_OK
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#endif
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#if 0
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#define ISAPNP_DEBUG
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#endif
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int isapnp_disable; /* Disable ISA PnP */
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static int isapnp_rdp; /* Read Data Port */
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static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
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static int isapnp_verbose = 1; /* verbose mode */
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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
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MODULE_DESCRIPTION("Generic ISA Plug & Play support");
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module_param(isapnp_disable, int, 0);
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MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
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module_param(isapnp_rdp, int, 0);
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MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
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module_param(isapnp_reset, int, 0);
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MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
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module_param(isapnp_verbose, int, 0);
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MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
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MODULE_LICENSE("GPL");
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#define _PIDXR 0x279
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#define _PNPWRP 0xa79
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/* short tags */
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#define _STAG_PNPVERNO 0x01
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#define _STAG_LOGDEVID 0x02
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#define _STAG_COMPATDEVID 0x03
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#define _STAG_IRQ 0x04
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#define _STAG_DMA 0x05
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#define _STAG_STARTDEP 0x06
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#define _STAG_ENDDEP 0x07
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#define _STAG_IOPORT 0x08
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#define _STAG_FIXEDIO 0x09
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#define _STAG_VENDOR 0x0e
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#define _STAG_END 0x0f
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/* long tags */
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#define _LTAG_MEMRANGE 0x81
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#define _LTAG_ANSISTR 0x82
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#define _LTAG_UNICODESTR 0x83
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#define _LTAG_VENDOR 0x84
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#define _LTAG_MEM32RANGE 0x85
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#define _LTAG_FIXEDMEM32RANGE 0x86
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static unsigned char isapnp_checksum_value;
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static DECLARE_MUTEX(isapnp_cfg_mutex);
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static int isapnp_detected;
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static int isapnp_csn_count;
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/* some prototypes */
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static inline void write_data(unsigned char x)
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{
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outb(x, _PNPWRP);
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}
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static inline void write_address(unsigned char x)
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{
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outb(x, _PIDXR);
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udelay(20);
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}
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static inline unsigned char read_data(void)
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{
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unsigned char val = inb(isapnp_rdp);
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return val;
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}
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unsigned char isapnp_read_byte(unsigned char idx)
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{
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write_address(idx);
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return read_data();
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}
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static unsigned short isapnp_read_word(unsigned char idx)
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{
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unsigned short val;
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val = isapnp_read_byte(idx);
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val = (val << 8) + isapnp_read_byte(idx+1);
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return val;
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}
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void isapnp_write_byte(unsigned char idx, unsigned char val)
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{
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write_address(idx);
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write_data(val);
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}
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static void isapnp_write_word(unsigned char idx, unsigned short val)
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{
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isapnp_write_byte(idx, val >> 8);
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isapnp_write_byte(idx+1, val);
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}
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static void *isapnp_alloc(long size)
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{
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void *result;
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result = kmalloc(size, GFP_KERNEL);
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if (!result)
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return NULL;
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memset(result, 0, size);
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return result;
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}
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static void isapnp_key(void)
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{
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unsigned char code = 0x6a, msb;
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int i;
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mdelay(1);
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write_address(0x00);
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write_address(0x00);
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write_address(code);
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for (i = 1; i < 32; i++) {
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msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
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code = (code >> 1) | msb;
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write_address(code);
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}
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}
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/* place all pnp cards in wait-for-key state */
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static void isapnp_wait(void)
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{
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isapnp_write_byte(0x02, 0x02);
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}
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static void isapnp_wake(unsigned char csn)
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{
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isapnp_write_byte(0x03, csn);
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}
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static void isapnp_device(unsigned char logdev)
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{
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isapnp_write_byte(0x07, logdev);
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}
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static void isapnp_activate(unsigned char logdev)
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{
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isapnp_device(logdev);
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isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
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udelay(250);
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}
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static void isapnp_deactivate(unsigned char logdev)
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{
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isapnp_device(logdev);
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isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
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udelay(500);
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}
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static void __init isapnp_peek(unsigned char *data, int bytes)
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{
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int i, j;
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unsigned char d=0;
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for (i = 1; i <= bytes; i++) {
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for (j = 0; j < 20; j++) {
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d = isapnp_read_byte(0x05);
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if (d & 1)
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break;
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udelay(100);
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}
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if (!(d & 1)) {
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if (data != NULL)
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*data++ = 0xff;
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continue;
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}
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d = isapnp_read_byte(0x04); /* PRESDI */
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isapnp_checksum_value += d;
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if (data != NULL)
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*data++ = d;
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}
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}
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#define RDP_STEP 32 /* minimum is 4 */
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static int isapnp_next_rdp(void)
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{
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int rdp = isapnp_rdp;
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static int old_rdp = 0;
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if(old_rdp)
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{
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release_region(old_rdp, 1);
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old_rdp = 0;
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}
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while (rdp <= 0x3ff) {
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/*
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* We cannot use NE2000 probe spaces for ISAPnP or we
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* will lock up machines.
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*/
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if ((rdp < 0x280 || rdp > 0x380) && request_region(rdp, 1, "ISAPnP"))
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{
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isapnp_rdp = rdp;
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old_rdp = rdp;
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return 0;
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}
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rdp += RDP_STEP;
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}
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return -1;
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}
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/* Set read port address */
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static inline void isapnp_set_rdp(void)
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{
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isapnp_write_byte(0x00, isapnp_rdp >> 2);
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udelay(100);
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}
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/*
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* Perform an isolation. The port selection code now tries to avoid
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* "dangerous to read" ports.
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*/
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static int __init isapnp_isolate_rdp_select(void)
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{
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isapnp_wait();
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isapnp_key();
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/* Control: reset CSN and conditionally everything else too */
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isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
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mdelay(2);
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isapnp_wait();
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isapnp_key();
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isapnp_wake(0x00);
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if (isapnp_next_rdp() < 0) {
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isapnp_wait();
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return -1;
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}
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isapnp_set_rdp();
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udelay(1000);
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write_address(0x01);
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udelay(1000);
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return 0;
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}
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/*
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* Isolate (assign uniqued CSN) to all ISA PnP devices.
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*/
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static int __init isapnp_isolate(void)
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{
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unsigned char checksum = 0x6a;
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unsigned char chksum = 0x00;
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unsigned char bit = 0x00;
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int data;
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int csn = 0;
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int i;
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int iteration = 1;
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isapnp_rdp = 0x213;
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if (isapnp_isolate_rdp_select() < 0)
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return -1;
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while (1) {
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for (i = 1; i <= 64; i++) {
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data = read_data() << 8;
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udelay(250);
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data = data | read_data();
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udelay(250);
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if (data == 0x55aa)
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bit = 0x01;
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checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
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bit = 0x00;
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}
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for (i = 65; i <= 72; i++) {
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data = read_data() << 8;
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udelay(250);
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data = data | read_data();
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udelay(250);
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if (data == 0x55aa)
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chksum |= (1 << (i - 65));
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}
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if (checksum != 0x00 && checksum == chksum) {
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csn++;
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isapnp_write_byte(0x06, csn);
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udelay(250);
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iteration++;
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isapnp_wake(0x00);
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isapnp_set_rdp();
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udelay(1000);
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write_address(0x01);
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udelay(1000);
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goto __next;
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}
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if (iteration == 1) {
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isapnp_rdp += RDP_STEP;
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if (isapnp_isolate_rdp_select() < 0)
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return -1;
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} else if (iteration > 1) {
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break;
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}
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__next:
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if (csn == 255)
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break;
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checksum = 0x6a;
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chksum = 0x00;
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bit = 0x00;
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}
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isapnp_wait();
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isapnp_csn_count = csn;
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return csn;
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}
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/*
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* Read one tag from stream.
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*/
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static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
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{
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unsigned char tag, tmp[2];
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isapnp_peek(&tag, 1);
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if (tag == 0) /* invalid tag */
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return -1;
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if (tag & 0x80) { /* large item */
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*type = tag;
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isapnp_peek(tmp, 2);
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*size = (tmp[1] << 8) | tmp[0];
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} else {
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*type = (tag >> 3) & 0x0f;
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*size = tag & 0x07;
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}
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#if 0
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printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size);
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#endif
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if (type == 0) /* wrong type */
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return -1;
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if (*type == 0xff && *size == 0xffff) /* probably invalid data */
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return -1;
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return 0;
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}
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|
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/*
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* Skip specified number of bytes from stream.
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*/
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static void __init isapnp_skip_bytes(int count)
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{
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isapnp_peek(NULL, count);
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}
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/*
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* Parse EISA id.
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*/
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static void isapnp_parse_id(struct pnp_dev * dev, unsigned short vendor, unsigned short device)
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{
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struct pnp_id * id;
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if (!dev)
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return;
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id = isapnp_alloc(sizeof(struct pnp_id));
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if (!id)
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return;
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sprintf(id->id, "%c%c%c%x%x%x%x",
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'A' + ((vendor >> 2) & 0x3f) - 1,
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'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
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'A' + ((vendor >> 8) & 0x1f) - 1,
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(device >> 4) & 0x0f,
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device & 0x0f,
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(device >> 12) & 0x0f,
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(device >> 8) & 0x0f);
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pnp_add_id(id, dev);
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}
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|
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/*
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* Parse logical device tag.
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*/
|
|
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static struct pnp_dev * __init isapnp_parse_device(struct pnp_card *card, int size, int number)
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{
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unsigned char tmp[6];
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struct pnp_dev *dev;
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isapnp_peek(tmp, size);
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dev = isapnp_alloc(sizeof(struct pnp_dev));
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if (!dev)
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return NULL;
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dev->number = number;
|
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isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
|
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dev->regs = tmp[4];
|
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dev->card = card;
|
|
if (size > 5)
|
|
dev->regs |= tmp[5] << 8;
|
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dev->protocol = &isapnp_protocol;
|
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dev->capabilities |= PNP_CONFIGURABLE;
|
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dev->capabilities |= PNP_READ;
|
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dev->capabilities |= PNP_WRITE;
|
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dev->capabilities |= PNP_DISABLE;
|
|
pnp_init_resource_table(&dev->res);
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return dev;
|
|
}
|
|
|
|
|
|
/*
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* Add IRQ resource to resources list.
|
|
*/
|
|
|
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static void __init isapnp_parse_irq_resource(struct pnp_option *option,
|
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int size)
|
|
{
|
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unsigned char tmp[3];
|
|
struct pnp_irq *irq;
|
|
unsigned long bits;
|
|
|
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isapnp_peek(tmp, size);
|
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irq = isapnp_alloc(sizeof(struct pnp_irq));
|
|
if (!irq)
|
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return;
|
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bits = (tmp[1] << 8) | tmp[0];
|
|
bitmap_copy(irq->map, &bits, 16);
|
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if (size > 2)
|
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irq->flags = tmp[2];
|
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else
|
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irq->flags = IORESOURCE_IRQ_HIGHEDGE;
|
|
pnp_register_irq_resource(option, irq);
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return;
|
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}
|
|
|
|
/*
|
|
* Add DMA resource to resources list.
|
|
*/
|
|
|
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static void __init isapnp_parse_dma_resource(struct pnp_option *option,
|
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int size)
|
|
{
|
|
unsigned char tmp[2];
|
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struct pnp_dma *dma;
|
|
|
|
isapnp_peek(tmp, size);
|
|
dma = isapnp_alloc(sizeof(struct pnp_dma));
|
|
if (!dma)
|
|
return;
|
|
dma->map = tmp[0];
|
|
dma->flags = tmp[1];
|
|
pnp_register_dma_resource(option, dma);
|
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return;
|
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}
|
|
|
|
/*
|
|
* Add port resource to resources list.
|
|
*/
|
|
|
|
static void __init isapnp_parse_port_resource(struct pnp_option *option,
|
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int size)
|
|
{
|
|
unsigned char tmp[7];
|
|
struct pnp_port *port;
|
|
|
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isapnp_peek(tmp, size);
|
|
port = isapnp_alloc(sizeof(struct pnp_port));
|
|
if (!port)
|
|
return;
|
|
port->min = (tmp[2] << 8) | tmp[1];
|
|
port->max = (tmp[4] << 8) | tmp[3];
|
|
port->align = tmp[5];
|
|
port->size = tmp[6];
|
|
port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0;
|
|
pnp_register_port_resource(option,port);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Add fixed port resource to resources list.
|
|
*/
|
|
|
|
static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option,
|
|
int size)
|
|
{
|
|
unsigned char tmp[3];
|
|
struct pnp_port *port;
|
|
|
|
isapnp_peek(tmp, size);
|
|
port = isapnp_alloc(sizeof(struct pnp_port));
|
|
if (!port)
|
|
return;
|
|
port->min = port->max = (tmp[1] << 8) | tmp[0];
|
|
port->size = tmp[2];
|
|
port->align = 0;
|
|
port->flags = PNP_PORT_FLAG_FIXED;
|
|
pnp_register_port_resource(option,port);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Add memory resource to resources list.
|
|
*/
|
|
|
|
static void __init isapnp_parse_mem_resource(struct pnp_option *option,
|
|
int size)
|
|
{
|
|
unsigned char tmp[9];
|
|
struct pnp_mem *mem;
|
|
|
|
isapnp_peek(tmp, size);
|
|
mem = isapnp_alloc(sizeof(struct pnp_mem));
|
|
if (!mem)
|
|
return;
|
|
mem->min = ((tmp[2] << 8) | tmp[1]) << 8;
|
|
mem->max = ((tmp[4] << 8) | tmp[3]) << 8;
|
|
mem->align = (tmp[6] << 8) | tmp[5];
|
|
mem->size = ((tmp[8] << 8) | tmp[7]) << 8;
|
|
mem->flags = tmp[0];
|
|
pnp_register_mem_resource(option,mem);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Add 32-bit memory resource to resources list.
|
|
*/
|
|
|
|
static void __init isapnp_parse_mem32_resource(struct pnp_option *option,
|
|
int size)
|
|
{
|
|
unsigned char tmp[17];
|
|
struct pnp_mem *mem;
|
|
|
|
isapnp_peek(tmp, size);
|
|
mem = isapnp_alloc(sizeof(struct pnp_mem));
|
|
if (!mem)
|
|
return;
|
|
mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
|
|
mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
|
|
mem->align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
|
|
mem->size = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
|
|
mem->flags = tmp[0];
|
|
pnp_register_mem_resource(option,mem);
|
|
}
|
|
|
|
/*
|
|
* Add 32-bit fixed memory resource to resources list.
|
|
*/
|
|
|
|
static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option,
|
|
int size)
|
|
{
|
|
unsigned char tmp[9];
|
|
struct pnp_mem *mem;
|
|
|
|
isapnp_peek(tmp, size);
|
|
mem = isapnp_alloc(sizeof(struct pnp_mem));
|
|
if (!mem)
|
|
return;
|
|
mem->min = mem->max = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
|
|
mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
|
|
mem->align = 0;
|
|
mem->flags = tmp[0];
|
|
pnp_register_mem_resource(option,mem);
|
|
}
|
|
|
|
/*
|
|
* Parse card name for ISA PnP device.
|
|
*/
|
|
|
|
static void __init
|
|
isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
|
|
{
|
|
if (name[0] == '\0') {
|
|
unsigned short size1 = *size >= name_max ? (name_max - 1) : *size;
|
|
isapnp_peek(name, size1);
|
|
name[size1] = '\0';
|
|
*size -= size1;
|
|
|
|
/* clean whitespace from end of string */
|
|
while (size1 > 0 && name[--size1] == ' ')
|
|
name[size1] = '\0';
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Parse resource map for logical device.
|
|
*/
|
|
|
|
static int __init isapnp_create_device(struct pnp_card *card,
|
|
unsigned short size)
|
|
{
|
|
int number = 0, skip = 0, priority = 0, compat = 0;
|
|
unsigned char type, tmp[17];
|
|
struct pnp_option *option;
|
|
struct pnp_dev *dev;
|
|
if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
|
|
return 1;
|
|
option = pnp_register_independent_option(dev);
|
|
if (!option) {
|
|
kfree(dev);
|
|
return 1;
|
|
}
|
|
pnp_add_card_device(card,dev);
|
|
|
|
while (1) {
|
|
if (isapnp_read_tag(&type, &size)<0)
|
|
return 1;
|
|
if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
|
|
goto __skip;
|
|
switch (type) {
|
|
case _STAG_LOGDEVID:
|
|
if (size >= 5 && size <= 6) {
|
|
if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
|
|
return 1;
|
|
size = 0;
|
|
skip = 0;
|
|
option = pnp_register_independent_option(dev);
|
|
if (!option)
|
|
return 1;
|
|
pnp_add_card_device(card,dev);
|
|
} else {
|
|
skip = 1;
|
|
}
|
|
priority = 0;
|
|
compat = 0;
|
|
break;
|
|
case _STAG_COMPATDEVID:
|
|
if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
|
|
isapnp_peek(tmp, 4);
|
|
isapnp_parse_id(dev,(tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
|
|
compat++;
|
|
size = 0;
|
|
}
|
|
break;
|
|
case _STAG_IRQ:
|
|
if (size < 2 || size > 3)
|
|
goto __skip;
|
|
isapnp_parse_irq_resource(option, size);
|
|
size = 0;
|
|
break;
|
|
case _STAG_DMA:
|
|
if (size != 2)
|
|
goto __skip;
|
|
isapnp_parse_dma_resource(option, size);
|
|
size = 0;
|
|
break;
|
|
case _STAG_STARTDEP:
|
|
if (size > 1)
|
|
goto __skip;
|
|
priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
|
|
if (size > 0) {
|
|
isapnp_peek(tmp, size);
|
|
priority = 0x100 | tmp[0];
|
|
size = 0;
|
|
}
|
|
option = pnp_register_dependent_option(dev,priority);
|
|
if (!option)
|
|
return 1;
|
|
break;
|
|
case _STAG_ENDDEP:
|
|
if (size != 0)
|
|
goto __skip;
|
|
priority = 0;
|
|
break;
|
|
case _STAG_IOPORT:
|
|
if (size != 7)
|
|
goto __skip;
|
|
isapnp_parse_port_resource(option, size);
|
|
size = 0;
|
|
break;
|
|
case _STAG_FIXEDIO:
|
|
if (size != 3)
|
|
goto __skip;
|
|
isapnp_parse_fixed_port_resource(option, size);
|
|
size = 0;
|
|
break;
|
|
case _STAG_VENDOR:
|
|
break;
|
|
case _LTAG_MEMRANGE:
|
|
if (size != 9)
|
|
goto __skip;
|
|
isapnp_parse_mem_resource(option, size);
|
|
size = 0;
|
|
break;
|
|
case _LTAG_ANSISTR:
|
|
isapnp_parse_name(dev->name, sizeof(dev->name), &size);
|
|
break;
|
|
case _LTAG_UNICODESTR:
|
|
/* silently ignore */
|
|
/* who use unicode for hardware identification? */
|
|
break;
|
|
case _LTAG_VENDOR:
|
|
break;
|
|
case _LTAG_MEM32RANGE:
|
|
if (size != 17)
|
|
goto __skip;
|
|
isapnp_parse_mem32_resource(option, size);
|
|
size = 0;
|
|
break;
|
|
case _LTAG_FIXEDMEM32RANGE:
|
|
if (size != 9)
|
|
goto __skip;
|
|
isapnp_parse_fixed_mem32_resource(option, size);
|
|
size = 0;
|
|
break;
|
|
case _STAG_END:
|
|
if (size > 0)
|
|
isapnp_skip_bytes(size);
|
|
return 1;
|
|
default:
|
|
printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", type, dev->number, card->number);
|
|
}
|
|
__skip:
|
|
if (size > 0)
|
|
isapnp_skip_bytes(size);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Parse resource map for ISA PnP card.
|
|
*/
|
|
|
|
static void __init isapnp_parse_resource_map(struct pnp_card *card)
|
|
{
|
|
unsigned char type, tmp[17];
|
|
unsigned short size;
|
|
|
|
while (1) {
|
|
if (isapnp_read_tag(&type, &size)<0)
|
|
return;
|
|
switch (type) {
|
|
case _STAG_PNPVERNO:
|
|
if (size != 2)
|
|
goto __skip;
|
|
isapnp_peek(tmp, 2);
|
|
card->pnpver = tmp[0];
|
|
card->productver = tmp[1];
|
|
size = 0;
|
|
break;
|
|
case _STAG_LOGDEVID:
|
|
if (size >= 5 && size <= 6) {
|
|
if (isapnp_create_device(card, size)==1)
|
|
return;
|
|
size = 0;
|
|
}
|
|
break;
|
|
case _STAG_VENDOR:
|
|
break;
|
|
case _LTAG_ANSISTR:
|
|
isapnp_parse_name(card->name, sizeof(card->name), &size);
|
|
break;
|
|
case _LTAG_UNICODESTR:
|
|
/* silently ignore */
|
|
/* who use unicode for hardware identification? */
|
|
break;
|
|
case _LTAG_VENDOR:
|
|
break;
|
|
case _STAG_END:
|
|
if (size > 0)
|
|
isapnp_skip_bytes(size);
|
|
return;
|
|
default:
|
|
printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", type, card->number);
|
|
}
|
|
__skip:
|
|
if (size > 0)
|
|
isapnp_skip_bytes(size);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compute ISA PnP checksum for first eight bytes.
|
|
*/
|
|
|
|
static unsigned char __init isapnp_checksum(unsigned char *data)
|
|
{
|
|
int i, j;
|
|
unsigned char checksum = 0x6a, bit, b;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
b = data[i];
|
|
for (j = 0; j < 8; j++) {
|
|
bit = 0;
|
|
if (b & (1 << j))
|
|
bit = 1;
|
|
checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
|
|
}
|
|
}
|
|
return checksum;
|
|
}
|
|
|
|
/*
|
|
* Parse EISA id for ISA PnP card.
|
|
*/
|
|
|
|
static void isapnp_parse_card_id(struct pnp_card * card, unsigned short vendor, unsigned short device)
|
|
{
|
|
struct pnp_id * id = isapnp_alloc(sizeof(struct pnp_id));
|
|
if (!id)
|
|
return;
|
|
sprintf(id->id, "%c%c%c%x%x%x%x",
|
|
'A' + ((vendor >> 2) & 0x3f) - 1,
|
|
'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
|
|
'A' + ((vendor >> 8) & 0x1f) - 1,
|
|
(device >> 4) & 0x0f,
|
|
device & 0x0f,
|
|
(device >> 12) & 0x0f,
|
|
(device >> 8) & 0x0f);
|
|
pnp_add_card_id(id,card);
|
|
}
|
|
|
|
/*
|
|
* Build device list for all present ISA PnP devices.
|
|
*/
|
|
|
|
static int __init isapnp_build_device_list(void)
|
|
{
|
|
int csn;
|
|
unsigned char header[9], checksum;
|
|
struct pnp_card *card;
|
|
|
|
isapnp_wait();
|
|
isapnp_key();
|
|
for (csn = 1; csn <= isapnp_csn_count; csn++) {
|
|
isapnp_wake(csn);
|
|
isapnp_peek(header, 9);
|
|
checksum = isapnp_checksum(header);
|
|
#if 0
|
|
printk(KERN_DEBUG "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
header[0], header[1], header[2], header[3],
|
|
header[4], header[5], header[6], header[7], header[8]);
|
|
printk(KERN_DEBUG "checksum = 0x%x\n", checksum);
|
|
#endif
|
|
if ((card = isapnp_alloc(sizeof(struct pnp_card))) == NULL)
|
|
continue;
|
|
|
|
card->number = csn;
|
|
INIT_LIST_HEAD(&card->devices);
|
|
isapnp_parse_card_id(card, (header[1] << 8) | header[0], (header[3] << 8) | header[2]);
|
|
card->serial = (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | header[4];
|
|
isapnp_checksum_value = 0x00;
|
|
isapnp_parse_resource_map(card);
|
|
if (isapnp_checksum_value != 0x00)
|
|
printk(KERN_ERR "isapnp: checksum for device %i is not valid (0x%x)\n", csn, isapnp_checksum_value);
|
|
card->checksum = isapnp_checksum_value;
|
|
card->protocol = &isapnp_protocol;
|
|
|
|
pnp_add_card(card);
|
|
}
|
|
isapnp_wait();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Basic configuration routines.
|
|
*/
|
|
|
|
int isapnp_present(void)
|
|
{
|
|
struct pnp_card *card;
|
|
pnp_for_each_card(card) {
|
|
if (card->protocol == &isapnp_protocol)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int isapnp_cfg_begin(int csn, int logdev)
|
|
{
|
|
if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
|
|
return -EINVAL;
|
|
down(&isapnp_cfg_mutex);
|
|
isapnp_wait();
|
|
isapnp_key();
|
|
isapnp_wake(csn);
|
|
#if 0
|
|
/* to avoid malfunction when the isapnptools package is used */
|
|
/* we must set RDP to our value again */
|
|
/* it is possible to set RDP only in the isolation phase */
|
|
/* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
|
|
isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
|
|
mdelay(2); /* is this necessary? */
|
|
isapnp_wake(csn); /* bring card into sleep state */
|
|
isapnp_wake(0); /* bring card into isolation state */
|
|
isapnp_set_rdp(); /* reset the RDP port */
|
|
udelay(1000); /* delay 1000us */
|
|
isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
|
|
udelay(250); /* is this necessary? */
|
|
#endif
|
|
if (logdev >= 0)
|
|
isapnp_device(logdev);
|
|
return 0;
|
|
}
|
|
|
|
int isapnp_cfg_end(void)
|
|
{
|
|
isapnp_wait();
|
|
up(&isapnp_cfg_mutex);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Inititialization.
|
|
*/
|
|
|
|
|
|
EXPORT_SYMBOL(isapnp_protocol);
|
|
EXPORT_SYMBOL(isapnp_present);
|
|
EXPORT_SYMBOL(isapnp_cfg_begin);
|
|
EXPORT_SYMBOL(isapnp_cfg_end);
|
|
EXPORT_SYMBOL(isapnp_read_byte);
|
|
EXPORT_SYMBOL(isapnp_write_byte);
|
|
|
|
static int isapnp_read_resources(struct pnp_dev *dev, struct pnp_resource_table *res)
|
|
{
|
|
int tmp, ret;
|
|
|
|
dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
|
|
if (dev->active) {
|
|
for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) {
|
|
ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1));
|
|
if (!ret)
|
|
continue;
|
|
res->port_resource[tmp].start = ret;
|
|
res->port_resource[tmp].flags = IORESOURCE_IO;
|
|
}
|
|
for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
|
|
ret = isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8;
|
|
if (!ret)
|
|
continue;
|
|
res->mem_resource[tmp].start = ret;
|
|
res->mem_resource[tmp].flags = IORESOURCE_MEM;
|
|
}
|
|
for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
|
|
ret = (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> 8);
|
|
if (!ret)
|
|
continue;
|
|
res->irq_resource[tmp].start = res->irq_resource[tmp].end = ret;
|
|
res->irq_resource[tmp].flags = IORESOURCE_IRQ;
|
|
}
|
|
for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
|
|
ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp);
|
|
if (ret == 4)
|
|
continue;
|
|
res->dma_resource[tmp].start = res->dma_resource[tmp].end = ret;
|
|
res->dma_resource[tmp].flags = IORESOURCE_DMA;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int isapnp_get_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
|
|
{
|
|
int ret;
|
|
pnp_init_resource_table(res);
|
|
isapnp_cfg_begin(dev->card->number, dev->number);
|
|
ret = isapnp_read_resources(dev, res);
|
|
isapnp_cfg_end();
|
|
return ret;
|
|
}
|
|
|
|
static int isapnp_set_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
|
|
{
|
|
int tmp;
|
|
|
|
isapnp_cfg_begin(dev->card->number, dev->number);
|
|
dev->active = 1;
|
|
for (tmp = 0; tmp < PNP_MAX_PORT && (res->port_resource[tmp].flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; tmp++)
|
|
isapnp_write_word(ISAPNP_CFG_PORT+(tmp<<1), res->port_resource[tmp].start);
|
|
for (tmp = 0; tmp < PNP_MAX_IRQ && (res->irq_resource[tmp].flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; tmp++) {
|
|
int irq = res->irq_resource[tmp].start;
|
|
if (irq == 2)
|
|
irq = 9;
|
|
isapnp_write_byte(ISAPNP_CFG_IRQ+(tmp<<1), irq);
|
|
}
|
|
for (tmp = 0; tmp < PNP_MAX_DMA && (res->dma_resource[tmp].flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; tmp++)
|
|
isapnp_write_byte(ISAPNP_CFG_DMA+tmp, res->dma_resource[tmp].start);
|
|
for (tmp = 0; tmp < PNP_MAX_MEM && (res->mem_resource[tmp].flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; tmp++)
|
|
isapnp_write_word(ISAPNP_CFG_MEM+(tmp<<3), (res->mem_resource[tmp].start >> 8) & 0xffff);
|
|
/* FIXME: We aren't handling 32bit mems properly here */
|
|
isapnp_activate(dev->number);
|
|
isapnp_cfg_end();
|
|
return 0;
|
|
}
|
|
|
|
static int isapnp_disable_resources(struct pnp_dev *dev)
|
|
{
|
|
if (!dev || !dev->active)
|
|
return -EINVAL;
|
|
isapnp_cfg_begin(dev->card->number, dev->number);
|
|
isapnp_deactivate(dev->number);
|
|
dev->active = 0;
|
|
isapnp_cfg_end();
|
|
return 0;
|
|
}
|
|
|
|
struct pnp_protocol isapnp_protocol = {
|
|
.name = "ISA Plug and Play",
|
|
.get = isapnp_get_resources,
|
|
.set = isapnp_set_resources,
|
|
.disable = isapnp_disable_resources,
|
|
};
|
|
|
|
static int __init isapnp_init(void)
|
|
{
|
|
int cards;
|
|
struct pnp_card *card;
|
|
struct pnp_dev *dev;
|
|
|
|
if (isapnp_disable) {
|
|
isapnp_detected = 0;
|
|
printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
|
|
return 0;
|
|
}
|
|
#ifdef ISAPNP_REGION_OK
|
|
if (!request_region(_PIDXR, 1, "isapnp index")) {
|
|
printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", _PIDXR);
|
|
return -EBUSY;
|
|
}
|
|
#endif
|
|
if (!request_region(_PNPWRP, 1, "isapnp write")) {
|
|
printk(KERN_ERR "isapnp: Write Data Register 0x%x already used\n", _PNPWRP);
|
|
#ifdef ISAPNP_REGION_OK
|
|
release_region(_PIDXR, 1);
|
|
#endif
|
|
return -EBUSY;
|
|
}
|
|
|
|
if(pnp_register_protocol(&isapnp_protocol)<0)
|
|
return -EBUSY;
|
|
|
|
/*
|
|
* Print a message. The existing ISAPnP code is hanging machines
|
|
* so let the user know where.
|
|
*/
|
|
|
|
printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
|
|
if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
|
|
isapnp_rdp |= 3;
|
|
if (!request_region(isapnp_rdp, 1, "isapnp read")) {
|
|
printk(KERN_ERR "isapnp: Read Data Register 0x%x already used\n", isapnp_rdp);
|
|
#ifdef ISAPNP_REGION_OK
|
|
release_region(_PIDXR, 1);
|
|
#endif
|
|
release_region(_PNPWRP, 1);
|
|
return -EBUSY;
|
|
}
|
|
isapnp_set_rdp();
|
|
}
|
|
isapnp_detected = 1;
|
|
if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
|
|
cards = isapnp_isolate();
|
|
if (cards < 0 ||
|
|
(isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
|
|
#ifdef ISAPNP_REGION_OK
|
|
release_region(_PIDXR, 1);
|
|
#endif
|
|
release_region(_PNPWRP, 1);
|
|
isapnp_detected = 0;
|
|
printk(KERN_INFO "isapnp: No Plug & Play device found\n");
|
|
return 0;
|
|
}
|
|
request_region(isapnp_rdp, 1, "isapnp read");
|
|
}
|
|
isapnp_build_device_list();
|
|
cards = 0;
|
|
|
|
protocol_for_each_card(&isapnp_protocol,card) {
|
|
cards++;
|
|
if (isapnp_verbose) {
|
|
printk(KERN_INFO "isapnp: Card '%s'\n", card->name[0]?card->name:"Unknown");
|
|
if (isapnp_verbose < 2)
|
|
continue;
|
|
card_for_each_dev(card,dev) {
|
|
printk(KERN_INFO "isapnp: Device '%s'\n", dev->name[0]?dev->name:"Unknown");
|
|
}
|
|
}
|
|
}
|
|
if (cards) {
|
|
printk(KERN_INFO "isapnp: %i Plug & Play card%s detected total\n", cards, cards>1?"s":"");
|
|
} else {
|
|
printk(KERN_INFO "isapnp: No Plug & Play card found\n");
|
|
}
|
|
|
|
isapnp_proc_init();
|
|
return 0;
|
|
}
|
|
|
|
device_initcall(isapnp_init);
|
|
|
|
/* format is: noisapnp */
|
|
|
|
static int __init isapnp_setup_disable(char *str)
|
|
{
|
|
isapnp_disable = 1;
|
|
return 1;
|
|
}
|
|
|
|
__setup("noisapnp", isapnp_setup_disable);
|
|
|
|
/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
|
|
|
|
static int __init isapnp_setup_isapnp(char *str)
|
|
{
|
|
(void)((get_option(&str,&isapnp_rdp) == 2) &&
|
|
(get_option(&str,&isapnp_reset) == 2) &&
|
|
(get_option(&str,&isapnp_verbose) == 2));
|
|
return 1;
|
|
}
|
|
|
|
__setup("isapnp=", isapnp_setup_isapnp);
|
|
|
|
|