Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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orangepi/linux-orangepi-5.10.y.git/trunk/drivers/pnp/isapnp/core.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  ISA Plug & Play support
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *  Changelog:
 *  2000-01-01	Added quirks handling for buggy hardware
 *		Peter Denison <peterd@pnd-pc.demon.co.uk>
 *  2000-06-14	Added isapnp_probe_devs() and isapnp_activate_dev()
 *		Christoph Hellwig <hch@infradead.org>
 *  2001-06-03  Added release_region calls to correspond with
 *		request_region calls when a failure occurs.  Also
 *		added KERN_* constants to printk() calls.
 *  2001-11-07  Added isapnp_{,un}register_driver calls along the lines
 *              of the pci driver interface
 *              Kai Germaschewski <kai.germaschewski@gmx.de>
 *  2002-06-06  Made the use of dma channel 0 configurable
 *              Gerald Teschl <gerald.teschl@univie.ac.at>
 *  2002-10-06  Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com>
 *  2003-08-11	Resource Management Updates - Adam Belay <ambx1@neo.rr.com>
 */
 
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/isapnp.h>
#include <linux/mutex.h>
#include <asm/io.h>
 
#include "../base.h"
 
#if 0
#define ISAPNP_REGION_OK
#endif
 
int isapnp_disable;		/* Disable ISA PnP */
static int isapnp_rdp;		/* Read Data Port */
static int isapnp_reset = 1;	/* reset all PnP cards (deactivate) */
static int isapnp_verbose = 1;	/* verbose mode */
 
module_param(isapnp_disable, int, 0);
MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
module_param(isapnp_rdp, int, 0);
MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
module_param(isapnp_reset, int, 0);
MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
module_param(isapnp_verbose, int, 0);
MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
 
#define _PIDXR		0x279
#define _PNPWRP		0xa79
 
/* short tags */
#define _STAG_PNPVERNO		0x01
#define _STAG_LOGDEVID		0x02
#define _STAG_COMPATDEVID	0x03
#define _STAG_IRQ		0x04
#define _STAG_DMA		0x05
#define _STAG_STARTDEP		0x06
#define _STAG_ENDDEP		0x07
#define _STAG_IOPORT		0x08
#define _STAG_FIXEDIO		0x09
#define _STAG_VENDOR		0x0e
#define _STAG_END		0x0f
/* long tags */
#define _LTAG_MEMRANGE		0x81
#define _LTAG_ANSISTR		0x82
#define _LTAG_UNICODESTR	0x83
#define _LTAG_VENDOR		0x84
#define _LTAG_MEM32RANGE	0x85
#define _LTAG_FIXEDMEM32RANGE	0x86
 
/* Logical device control and configuration registers */
 
#define ISAPNP_CFG_ACTIVATE	0x30	/* byte */
#define ISAPNP_CFG_MEM		0x40	/* 4 * dword */
#define ISAPNP_CFG_PORT		0x60	/* 8 * word */
#define ISAPNP_CFG_IRQ		0x70	/* 2 * word */
#define ISAPNP_CFG_DMA		0x74	/* 2 * byte */
 
/*
 * Sizes of ISAPNP logical device configuration register sets.
 * See PNP-ISA-v1.0a.pdf, Appendix A.
 */
#define ISAPNP_MAX_MEM		4
#define ISAPNP_MAX_PORT		8
#define ISAPNP_MAX_IRQ		2
#define ISAPNP_MAX_DMA		2
 
static unsigned char isapnp_checksum_value;
static DEFINE_MUTEX(isapnp_cfg_mutex);
static int isapnp_csn_count;
 
/* some prototypes */
 
static inline void write_data(unsigned char x)
{
<------>outb(x, _PNPWRP);
}
 
static inline void write_address(unsigned char x)
{
<------>outb(x, _PIDXR);
<------>udelay(20);
}
 
static inline unsigned char read_data(void)
{
<------>unsigned char val = inb(isapnp_rdp);
<------>return val;
}
 
unsigned char isapnp_read_byte(unsigned char idx)
{
<------>write_address(idx);
<------>return read_data();
}
 
static unsigned short isapnp_read_word(unsigned char idx)
{
<------>unsigned short val;
 
<------>val = isapnp_read_byte(idx);
<------>val = (val << 8) + isapnp_read_byte(idx + 1);
<------>return val;
}
 
void isapnp_write_byte(unsigned char idx, unsigned char val)
{
<------>write_address(idx);
<------>write_data(val);
}
 
static void isapnp_write_word(unsigned char idx, unsigned short val)
{
<------>isapnp_write_byte(idx, val >> 8);
<------>isapnp_write_byte(idx + 1, val);
}
 
static void isapnp_key(void)
{
<------>unsigned char code = 0x6a, msb;
<------>int i;
 
<------>mdelay(1);
<------>write_address(0x00);
<------>write_address(0x00);
 
<------>write_address(code);
 
<------>for (i = 1; i < 32; i++) {
<------><------>msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
<------><------>code = (code >> 1) | msb;
<------><------>write_address(code);
<------>}
}
 
/* place all pnp cards in wait-for-key state */
static void isapnp_wait(void)
{
<------>isapnp_write_byte(0x02, 0x02);
}
 
static void isapnp_wake(unsigned char csn)
{
<------>isapnp_write_byte(0x03, csn);
}
 
static void isapnp_device(unsigned char logdev)
{
<------>isapnp_write_byte(0x07, logdev);
}
 
static void isapnp_activate(unsigned char logdev)
{
<------>isapnp_device(logdev);
<------>isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
<------>udelay(250);
}
 
static void isapnp_deactivate(unsigned char logdev)
{
<------>isapnp_device(logdev);
<------>isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
<------>udelay(500);
}
 
static void __init isapnp_peek(unsigned char *data, int bytes)
{
<------>int i, j;
<------>unsigned char d = 0;
 
<------>for (i = 1; i <= bytes; i++) {
<------><------>for (j = 0; j < 20; j++) {
<------><------><------>d = isapnp_read_byte(0x05);
<------><------><------>if (d & 1)
<------><------><------><------>break;
<------><------><------>udelay(100);
<------><------>}
<------><------>if (!(d & 1)) {
<------><------><------>if (data != NULL)
<------><------><------><------>*data++ = 0xff;
<------><------><------>continue;
<------><------>}
<------><------>d = isapnp_read_byte(0x04);	/* PRESDI */
<------><------>isapnp_checksum_value += d;
<------><------>if (data != NULL)
<------><------><------>*data++ = d;
<------>}
}
 
#define RDP_STEP	32	/* minimum is 4 */
 
static int isapnp_next_rdp(void)
{
<------>int rdp = isapnp_rdp;
<------>static int old_rdp = 0;
 
<------>if (old_rdp) {
<------><------>release_region(old_rdp, 1);
<------><------>old_rdp = 0;
<------>}
<------>while (rdp <= 0x3ff) {
<------><------>/*
<------><------> *      We cannot use NE2000 probe spaces for ISAPnP or we
<------><------> *      will lock up machines.
<------><------> */
<------><------>if ((rdp < 0x280 || rdp > 0x380)
<------><------>    && request_region(rdp, 1, "ISAPnP")) {
<------><------><------>isapnp_rdp = rdp;
<------><------><------>old_rdp = rdp;
<------><------><------>return 0;
<------><------>}
<------><------>rdp += RDP_STEP;
<------>}
<------>return -1;
}
 
/* Set read port address */
static inline void isapnp_set_rdp(void)
{
<------>isapnp_write_byte(0x00, isapnp_rdp >> 2);
<------>udelay(100);
}
 
/*
 *	Perform an isolation. The port selection code now tries to avoid
 *	"dangerous to read" ports.
 */
static int __init isapnp_isolate_rdp_select(void)
{
<------>isapnp_wait();
<------>isapnp_key();
 
<------>/* Control: reset CSN and conditionally everything else too */
<------>isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
<------>mdelay(2);
 
<------>isapnp_wait();
<------>isapnp_key();
<------>isapnp_wake(0x00);
 
<------>if (isapnp_next_rdp() < 0) {
<------><------>isapnp_wait();
<------><------>return -1;
<------>}
 
<------>isapnp_set_rdp();
<------>udelay(1000);
<------>write_address(0x01);
<------>udelay(1000);
<------>return 0;
}
 
/*
 *  Isolate (assign uniqued CSN) to all ISA PnP devices.
 */
static int __init isapnp_isolate(void)
{
<------>unsigned char checksum = 0x6a;
<------>unsigned char chksum = 0x00;
<------>unsigned char bit = 0x00;
<------>int data;
<------>int csn = 0;
<------>int i;
<------>int iteration = 1;
 
<------>isapnp_rdp = 0x213;
<------>if (isapnp_isolate_rdp_select() < 0)
<------><------>return -1;
 
<------>while (1) {
<------><------>for (i = 1; i <= 64; i++) {
<------><------><------>data = read_data() << 8;
<------><------><------>udelay(250);
<------><------><------>data = data | read_data();
<------><------><------>udelay(250);
<------><------><------>if (data == 0x55aa)
<------><------><------><------>bit = 0x01;
<------><------><------>checksum =
<------><------><------>    ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
<------><------><------>    | (checksum >> 1);
<------><------><------>bit = 0x00;
<------><------>}
<------><------>for (i = 65; i <= 72; i++) {
<------><------><------>data = read_data() << 8;
<------><------><------>udelay(250);
<------><------><------>data = data | read_data();
<------><------><------>udelay(250);
<------><------><------>if (data == 0x55aa)
<------><------><------><------>chksum |= (1 << (i - 65));
<------><------>}
<------><------>if (checksum != 0x00 && checksum == chksum) {
<------><------><------>csn++;
 
<------><------><------>isapnp_write_byte(0x06, csn);
<------><------><------>udelay(250);
<------><------><------>iteration++;
<------><------><------>isapnp_wake(0x00);
<------><------><------>isapnp_set_rdp();
<------><------><------>udelay(1000);
<------><------><------>write_address(0x01);
<------><------><------>udelay(1000);
<------><------><------>goto __next;
<------><------>}
<------><------>if (iteration == 1) {
<------><------><------>isapnp_rdp += RDP_STEP;
<------><------><------>if (isapnp_isolate_rdp_select() < 0)
<------><------><------><------>return -1;
<------><------>} else if (iteration > 1) {
<------><------><------>break;
<------><------>}
__next:
<------><------>if (csn == 255)
<------><------><------>break;
<------><------>checksum = 0x6a;
<------><------>chksum = 0x00;
<------><------>bit = 0x00;
<------>}
<------>isapnp_wait();
<------>isapnp_csn_count = csn;
<------>return csn;
}
 
/*
 *  Read one tag from stream.
 */
static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
{
<------>unsigned char tag, tmp[2];
 
<------>isapnp_peek(&tag, 1);
<------>if (tag == 0)		/* invalid tag */
<------><------>return -1;
<------>if (tag & 0x80) {	/* large item */
<------><------>*type = tag;
<------><------>isapnp_peek(tmp, 2);
<------><------>*size = (tmp[1] << 8) | tmp[0];
<------>} else {
<------><------>*type = (tag >> 3) & 0x0f;
<------><------>*size = tag & 0x07;
<------>}
<------>if (*type == 0xff && *size == 0xffff)	/* probably invalid data */
<------><------>return -1;
<------>return 0;
}
 
/*
 *  Skip specified number of bytes from stream.
 */
static void __init isapnp_skip_bytes(int count)
{
<------>isapnp_peek(NULL, count);
}
 
/*
 *  Parse logical device tag.
 */
static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card,
<------><------><------><------><------><------>  int size, int number)
{
<------>unsigned char tmp[6];
<------>struct pnp_dev *dev;
<------>u32 eisa_id;
<------>char id[8];
 
<------>isapnp_peek(tmp, size);
<------>eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24;
<------>pnp_eisa_id_to_string(eisa_id, id);
 
<------>dev = pnp_alloc_dev(&isapnp_protocol, number, id);
<------>if (!dev)
<------><------>return NULL;
 
<------>dev->card = card;
<------>dev->capabilities |= PNP_CONFIGURABLE;
<------>dev->capabilities |= PNP_READ;
<------>dev->capabilities |= PNP_WRITE;
<------>dev->capabilities |= PNP_DISABLE;
<------>pnp_init_resources(dev);
<------>return dev;
}
 
/*
 *  Add IRQ resource to resources list.
 */
static void __init isapnp_parse_irq_resource(struct pnp_dev *dev,
<------><------><------><------><------>     unsigned int option_flags,
<------><------><------><------><------>     int size)
{
<------>unsigned char tmp[3];
<------>unsigned long bits;
<------>pnp_irq_mask_t map;
<------>unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
 
<------>isapnp_peek(tmp, size);
<------>bits = (tmp[1] << 8) | tmp[0];
 
<------>bitmap_zero(map.bits, PNP_IRQ_NR);
<------>bitmap_copy(map.bits, &bits, 16);
 
<------>if (size > 2)
<------><------>flags = tmp[2];
 
<------>pnp_register_irq_resource(dev, option_flags, &map, flags);
}
 
/*
 *  Add DMA resource to resources list.
 */
static void __init isapnp_parse_dma_resource(struct pnp_dev *dev,
<------><------><------><------><------>     unsigned int option_flags,
<------><------><------><------><------>     int size)
{
<------>unsigned char tmp[2];
 
<------>isapnp_peek(tmp, size);
<------>pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]);
}
 
/*
 *  Add port resource to resources list.
 */
static void __init isapnp_parse_port_resource(struct pnp_dev *dev,
<------><------><------><------><------>      unsigned int option_flags,
<------><------><------><------><------>      int size)
{
<------>unsigned char tmp[7];
<------>resource_size_t min, max, align, len;
<------>unsigned char flags;
 
<------>isapnp_peek(tmp, size);
<------>min = (tmp[2] << 8) | tmp[1];
<------>max = (tmp[4] << 8) | tmp[3];
<------>align = tmp[5];
<------>len = tmp[6];
<------>flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0;
<------>pnp_register_port_resource(dev, option_flags,
<------><------><------><------>   min, max, align, len, flags);
}
 
/*
 *  Add fixed port resource to resources list.
 */
static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev,
<------><------><------><------><------><------>    unsigned int option_flags,
<------><------><------><------><------><------>    int size)
{
<------>unsigned char tmp[3];
<------>resource_size_t base, len;
 
<------>isapnp_peek(tmp, size);
<------>base = (tmp[1] << 8) | tmp[0];
<------>len = tmp[2];
<------>pnp_register_port_resource(dev, option_flags, base, base, 0, len,
<------><------><------><------>   IORESOURCE_IO_FIXED);
}
 
/*
 *  Add memory resource to resources list.
 */
static void __init isapnp_parse_mem_resource(struct pnp_dev *dev,
<------><------><------><------><------>     unsigned int option_flags,
<------><------><------><------><------>     int size)
{
<------>unsigned char tmp[9];
<------>resource_size_t min, max, align, len;
<------>unsigned char flags;
 
<------>isapnp_peek(tmp, size);
<------>min = ((tmp[2] << 8) | tmp[1]) << 8;
<------>max = ((tmp[4] << 8) | tmp[3]) << 8;
<------>align = (tmp[6] << 8) | tmp[5];
<------>len = ((tmp[8] << 8) | tmp[7]) << 8;
<------>flags = tmp[0];
<------>pnp_register_mem_resource(dev, option_flags,
<------><------><------><------>  min, max, align, len, flags);
}
 
/*
 *  Add 32-bit memory resource to resources list.
 */
static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev,
<------><------><------><------><------>       unsigned int option_flags,
<------><------><------><------><------>       int size)
{
<------>unsigned char tmp[17];
<------>resource_size_t min, max, align, len;
<------>unsigned char flags;
 
<------>isapnp_peek(tmp, size);
<------>min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
<------>max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
<------>align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
<------>len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
<------>flags = tmp[0];
<------>pnp_register_mem_resource(dev, option_flags,
<------><------><------><------>  min, max, align, len, flags);
}
 
/*
 *  Add 32-bit fixed memory resource to resources list.
 */
static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev,
<------><------><------><------><------><------>     unsigned int option_flags,
<------><------><------><------><------><------>     int size)
{
<------>unsigned char tmp[9];
<------>resource_size_t base, len;
<------>unsigned char flags;
 
<------>isapnp_peek(tmp, size);
<------>base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
<------>len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
<------>flags = tmp[0];
<------>pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
}
 
/*
 *  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, compat = 0;
<------>unsigned char type, tmp[17];
<------>unsigned int option_flags;
<------>struct pnp_dev *dev;
<------>u32 eisa_id;
<------>char id[8];
 
<------>if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
<------><------>return 1;
<------>option_flags = 0;
<------>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_flags = 0;
<------><------><------><------>pnp_add_card_device(card, dev);
<------><------><------>} else {
<------><------><------><------>skip = 1;
<------><------><------>}
<------><------><------>compat = 0;
<------><------><------>break;
<------><------>case _STAG_COMPATDEVID:
<------><------><------>if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
<------><------><------><------>isapnp_peek(tmp, 4);
<------><------><------><------>eisa_id = tmp[0] | tmp[1] << 8 |
<------><------><------><------><------>  tmp[2] << 16 | tmp[3] << 24;
<------><------><------><------>pnp_eisa_id_to_string(eisa_id, id);
<------><------><------><------>pnp_add_id(dev, id);
<------><------><------><------>compat++;
<------><------><------><------>size = 0;
<------><------><------>}
<------><------><------>break;
<------><------>case _STAG_IRQ:
<------><------><------>if (size < 2 || size > 3)
<------><------><------><------>goto __skip;
<------><------><------>isapnp_parse_irq_resource(dev, option_flags, size);
<------><------><------>size = 0;
<------><------><------>break;
<------><------>case _STAG_DMA:
<------><------><------>if (size != 2)
<------><------><------><------>goto __skip;
<------><------><------>isapnp_parse_dma_resource(dev, option_flags, size);
<------><------><------>size = 0;
<------><------><------>break;
<------><------>case _STAG_STARTDEP:
<------><------><------>if (size > 1)
<------><------><------><------>goto __skip;
<------><------><------>priority = PNP_RES_PRIORITY_ACCEPTABLE;
<------><------><------>if (size > 0) {
<------><------><------><------>isapnp_peek(tmp, size);
<------><------><------><------>priority = tmp[0];
<------><------><------><------>size = 0;
<------><------><------>}
<------><------><------>option_flags = pnp_new_dependent_set(dev, priority);
<------><------><------>break;
<------><------>case _STAG_ENDDEP:
<------><------><------>if (size != 0)
<------><------><------><------>goto __skip;
<------><------><------>option_flags = 0;
<------><------><------>break;
<------><------>case _STAG_IOPORT:
<------><------><------>if (size != 7)
<------><------><------><------>goto __skip;
<------><------><------>isapnp_parse_port_resource(dev, option_flags, size);
<------><------><------>size = 0;
<------><------><------>break;
<------><------>case _STAG_FIXEDIO:
<------><------><------>if (size != 3)
<------><------><------><------>goto __skip;
<------><------><------>isapnp_parse_fixed_port_resource(dev, option_flags,
<------><------><------><------><------><------><------> size);
<------><------><------>size = 0;
<------><------><------>break;
<------><------>case _STAG_VENDOR:
<------><------><------>break;
<------><------>case _LTAG_MEMRANGE:
<------><------><------>if (size != 9)
<------><------><------><------>goto __skip;
<------><------><------>isapnp_parse_mem_resource(dev, option_flags, 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(dev, option_flags, size);
<------><------><------>size = 0;
<------><------><------>break;
<------><------>case _LTAG_FIXEDMEM32RANGE:
<------><------><------>if (size != 9)
<------><------><------><------>goto __skip;
<------><------><------>isapnp_parse_fixed_mem32_resource(dev, option_flags,
<------><------><------><------><------><------><------>  size);
<------><------><------>size = 0;
<------><------><------>break;
<------><------>case _STAG_END:
<------><------><------>if (size > 0)
<------><------><------><------>isapnp_skip_bytes(size);
<------><------><------>return 1;
<------><------>default:
<------><------><------>dev_err(&dev->dev, "unknown tag %#x (card %i), "
<------><------><------><------>"ignored\n", type, 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:
<------><------><------>dev_err(&card->dev, "unknown tag %#x, ignored\n",
<------><------><------>       type);
<------><------>}
__skip:
<------><------>if (size > 0)
<------><------><------>isapnp_skip_bytes(size);
<------>}
}
 
/*
 *  Build device list for all present ISA PnP devices.
 */
static int __init isapnp_build_device_list(void)
{
<------>int csn;
<------>unsigned char header[9];
<------>struct pnp_card *card;
<------>u32 eisa_id;
<------>char id[8];
 
<------>isapnp_wait();
<------>isapnp_key();
<------>for (csn = 1; csn <= isapnp_csn_count; csn++) {
<------><------>isapnp_wake(csn);
<------><------>isapnp_peek(header, 9);
<------><------>eisa_id = header[0] | header[1] << 8 |
<------><------><------>  header[2] << 16 | header[3] << 24;
<------><------>pnp_eisa_id_to_string(eisa_id, id);
<------><------>card = pnp_alloc_card(&isapnp_protocol, csn, id);
<------><------>if (!card)
<------><------><------>continue;
 
<------><------>INIT_LIST_HEAD(&card->devices);
<------><------>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)
<------><------><------>dev_err(&card->dev, "invalid checksum %#x\n",
<------><------><------><------>isapnp_checksum_value);
<------><------>card->checksum = isapnp_checksum_value;
 
<------><------>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;
<------>mutex_lock(&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();
<------>mutex_unlock(&isapnp_cfg_mutex);
<------>return 0;
}
 
/*
 *  Initialization.
 */
 
EXPORT_SYMBOL(isapnp_protocol);
EXPORT_SYMBOL(isapnp_present);
EXPORT_SYMBOL(isapnp_cfg_begin);
EXPORT_SYMBOL(isapnp_cfg_end);
EXPORT_SYMBOL(isapnp_write_byte);
 
static int isapnp_get_resources(struct pnp_dev *dev)
{
<------>int i, ret;
 
<------>pnp_dbg(&dev->dev, "get resources\n");
<------>pnp_init_resources(dev);
<------>isapnp_cfg_begin(dev->card->number, dev->number);
<------>dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
<------>if (!dev->active)
<------><------>goto __end;
 
<------>for (i = 0; i < ISAPNP_MAX_PORT; i++) {
<------><------>ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1));
<------><------>pnp_add_io_resource(dev, ret, ret,
<------><------><------><------>    ret == 0 ? IORESOURCE_DISABLED : 0);
<------>}
<------>for (i = 0; i < ISAPNP_MAX_MEM; i++) {
<------><------>ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8;
<------><------>pnp_add_mem_resource(dev, ret, ret,
<------><------><------><------>     ret == 0 ? IORESOURCE_DISABLED : 0);
<------>}
<------>for (i = 0; i < ISAPNP_MAX_IRQ; i++) {
<------><------>ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8;
<------><------>pnp_add_irq_resource(dev, ret,
<------><------><------><------>     ret == 0 ? IORESOURCE_DISABLED : 0);
<------>}
<------>for (i = 0; i < ISAPNP_MAX_DMA; i++) {
<------><------>ret = isapnp_read_byte(ISAPNP_CFG_DMA + i);
<------><------>pnp_add_dma_resource(dev, ret,
<------><------><------><------>     ret == 4 ? IORESOURCE_DISABLED : 0);
<------>}
 
__end:
<------>isapnp_cfg_end();
<------>return 0;
}
 
static int isapnp_set_resources(struct pnp_dev *dev)
{
<------>struct resource *res;
<------>int tmp;
 
<------>pnp_dbg(&dev->dev, "set resources\n");
<------>isapnp_cfg_begin(dev->card->number, dev->number);
<------>dev->active = 1;
<------>for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
<------><------>res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
<------><------>if (pnp_resource_enabled(res)) {
<------><------><------>pnp_dbg(&dev->dev, "  set io  %d to %#llx\n",
<------><------><------><------>tmp, (unsigned long long) res->start);
<------><------><------>isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
<------><------><------><------><------>  res->start);
<------><------>}
<------>}
<------>for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
<------><------>res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
<------><------>if (pnp_resource_enabled(res)) {
<------><------><------>int irq = res->start;
<------><------><------>if (irq == 2)
<------><------><------><------>irq = 9;
<------><------><------>pnp_dbg(&dev->dev, "  set irq %d to %d\n", tmp, irq);
<------><------><------>isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
<------><------>}
<------>}
<------>for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
<------><------>res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
<------><------>if (pnp_resource_enabled(res)) {
<------><------><------>pnp_dbg(&dev->dev, "  set dma %d to %lld\n",
<------><------><------><------>tmp, (unsigned long long) res->start);
<------><------><------>isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
<------><------>}
<------>}
<------>for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
<------><------>res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
<------><------>if (pnp_resource_enabled(res)) {
<------><------><------>pnp_dbg(&dev->dev, "  set mem %d to %#llx\n",
<------><------><------><------>tmp, (unsigned long long) res->start);
<------><------><------>isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
<------><------><------><------><------>  (res->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->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) {
<------><------>printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
<------><------>return 0;
<------>}
#ifdef CONFIG_PPC
<------>if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP))
<------><------>return -EINVAL;
#endif
#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();
<------>}
<------>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);
<------><------><------>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) {
<------><------><------>dev_info(&card->dev, "card '%s'\n",
<------><------><------>       card->name[0] ? card->name : "unknown");
<------><------><------>if (isapnp_verbose < 2)
<------><------><------><------>continue;
<------><------><------>card_for_each_dev(card, dev) {
<------><------><------><------>dev_info(&card->dev, "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);
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