Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c
new file mode 100644
index 0000000..82c5edd
--- /dev/null
+++ b/drivers/pnp/isapnp/core.c
@@ -0,0 +1,1156 @@
+/*
+ * ISA Plug & Play support
+ * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/isapnp.h>
+#include <asm/io.h>
+
+#if 0
+#define ISAPNP_REGION_OK
+#endif
+#if 0
+#define ISAPNP_DEBUG
+#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_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
+MODULE_DESCRIPTION("Generic ISA Plug & Play support");
+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");
+MODULE_LICENSE("GPL");
+
+#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
+
+static unsigned char isapnp_checksum_value;
+static DECLARE_MUTEX(isapnp_cfg_mutex);
+static int isapnp_detected;
+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_alloc(long size)
+{
+ void *result;
+
+ result = kmalloc(size, GFP_KERNEL);
+ if (!result)
+ return NULL;
+ memset(result, 0, size);
+ return result;
+}
+
+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 0
+ printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size);
+#endif
+ if (type == 0) /* wrong type */
+ return -1;
+ 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 EISA id.
+ */
+
+static void isapnp_parse_id(struct pnp_dev * dev, unsigned short vendor, unsigned short device)
+{
+ struct pnp_id * id;
+ if (!dev)
+ return;
+ 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_id(id, dev);
+}
+
+/*
+ * 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;
+
+ isapnp_peek(tmp, size);
+ dev = isapnp_alloc(sizeof(struct pnp_dev));
+ if (!dev)
+ return NULL;
+ dev->number = number;
+ isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
+ dev->regs = tmp[4];
+ dev->card = card;
+ if (size > 5)
+ dev->regs |= tmp[5] << 8;
+ dev->protocol = &isapnp_protocol;
+ dev->capabilities |= PNP_CONFIGURABLE;
+ dev->capabilities |= PNP_READ;
+ dev->capabilities |= PNP_WRITE;
+ dev->capabilities |= PNP_DISABLE;
+ pnp_init_resource_table(&dev->res);
+ return dev;
+}
+
+
+/*
+ * Add IRQ resource to resources list.
+ */
+
+static void __init isapnp_parse_irq_resource(struct pnp_option *option,
+ int size)
+{
+ unsigned char tmp[3];
+ struct pnp_irq *irq;
+ unsigned long bits;
+
+ isapnp_peek(tmp, size);
+ irq = isapnp_alloc(sizeof(struct pnp_irq));
+ if (!irq)
+ return;
+ bits = (tmp[1] << 8) | tmp[0];
+ bitmap_copy(irq->map, &bits, 16);
+ if (size > 2)
+ irq->flags = tmp[2];
+ else
+ irq->flags = IORESOURCE_IRQ_HIGHEDGE;
+ pnp_register_irq_resource(option, irq);
+ return;
+}
+
+/*
+ * Add DMA resource to resources list.
+ */
+
+static void __init isapnp_parse_dma_resource(struct pnp_option *option,
+ int size)
+{
+ unsigned char tmp[2];
+ 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);
+ return;
+}
+
+/*
+ * Add port resource to resources list.
+ */
+
+static void __init isapnp_parse_port_resource(struct pnp_option *option,
+ int size)
+{
+ unsigned char tmp[7];
+ struct pnp_port *port;
+
+ 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);
+