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path: root/drivers/pnp/isapnp/core.c
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-rw-r--r--drivers/pnp/isapnp/core.c1109
1 files changed, 1109 insertions, 0 deletions
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c
new file mode 100644
index 000000000..cf88f9b62
--- /dev/null
+++ b/drivers/pnp/isapnp/core.c
@@ -0,0 +1,1109 @@
+/*
+ * ISA Plug & Play support
+ * Copyright (c) by Jaroslav Kysela <perex@perex.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/module.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_AUTHOR("Jaroslav Kysela <perex@perex.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
+
+/* 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);
+ }
+}
+
+/*
+ * 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;
+}
+
+/*
+ * 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;
+ 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);
+ checksum = isapnp_checksum(header);
+ 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 10:17:47 +0000