patch-2.4.5 linux/drivers/net/pcmcia/hermes.c

• Lines: 503
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.4/linux/drivers/net/pcmcia/hermes.c
• Orig date: Wed Apr 25 14:45:48 2001

diff -u --recursive --new-file v2.4.4/linux/drivers/net/pcmcia/hermes.c linux/drivers/net/pcmcia/hermes.c
@@ -1,502 +0,0 @@
-/* hermes.c
- *
- * Driver core for the "Hermes" wireless MAC controller, as used in
- * the Lucent Orinoco and Cabletron RoamAbout cards. It should also
- * work on the hfa3841 and hfa3842 MAC controller chips used in the
- * Prism I & II chipsets.
- *
- * This is not a complete driver, just low-level access routines for
- * the MAC controller itself.
- *
- * Based on the prism2 driver from Absolute Value Systems' linux-wlan
- * project, the Linux wvlan_cs driver, Lucent's HCF-Light
- * (wvlan_hcf.c) library, and the NetBSD wireless driver.
- *
- * Copyright (C) 2000, David Gibson, Linuxcare Australia <hermes@gibson.dropbear.id.au>
- * 
- * This file distributed under the GPL, version 2.
- */
-
-static const char *version = "hermes.c: 12 Dec 2000 David Gibson <hermes@gibson.dropbear.id.au>";
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/threads.h>
-#include <linux/smp.h>
-#include <asm/io.h>
-#include <linux/ptrace.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <asm/errno.h>
-
-#include "hermes.h"
-
-#define CMD_BUSY_TIMEOUT (100) /* In iterations of ~1us */
-#define CMD_INIT_TIMEOUT (50000) /* in iterations of ~10us */
-#define CMD_COMPL_TIMEOUT (10000) /* in iterations of ~10us */
-#define ALLOC_COMPL_TIMEOUT (1000) /* in iterations of ~10us */
-#define BAP_BUSY_TIMEOUT (500) /* In iterations of ~1us */
-#define BAP_ERROR_RETRY (10) /* How many times to retry a BAP seek when there is an error */
-
-#define MAX(a, b) ( (a) > (b) ? (a) : (b) )
-#define MIN(a, b) ( (a) < (b) ? (a) : (b) )
-
-/*
- * Debugging helpers
- */
-
-#undef HERMES_DEBUG
-#ifdef HERMES_DEBUG
-
-#include <stdarg.h>
-
-#define DMSG(stuff...) do {printk(KERN_DEBUG "hermes @ 0x%x: " , hw->iobase); \
-			printk(#stuff);} while (0)
-
-#define DEBUG(lvl, stuff...) if ( (lvl) <= HERMES_DEBUG) DMSG(#stuff)
-
-#else /* ! HERMES_DEBUG */
-
-#define DEBUG(lvl, stuff...) do { } while (0)
-
-#endif /* ! HERMES_DEBUG */
-
-/*
- * Prototypes
- */
-
-static int hermes_issue_cmd(hermes_t *hw, uint16_t cmd, uint16_t param0);
-
-/*
- * Internal inline functions
- */
-
-/*
- * Internal functions
- */
-
-/* Issue a command to the chip. Waiting for it to complete is the caller's
-   problem.
-
-   Returns -EBUSY if the command register is busy, 0 on success.
-
-   Callable from any context.
-*/
-static int hermes_issue_cmd(hermes_t *hw, uint16_t cmd, uint16_t param0)
-{
-	uint16_t reg;
-/*  	unsigned long k = CMD_BUSY_TIMEOUT; */
-
-	/* First check that the command register is not busy */
-	reg = hermes_read_regn(hw, CMD);
-	if (reg & HERMES_CMD_BUSY) {
-		return -EBUSY;
-	}
-
-	hermes_write_regn(hw, PARAM2, 0);
-	hermes_write_regn(hw, PARAM1, 0);
-	hermes_write_regn(hw, PARAM0, param0);
-	hermes_write_regn(hw, CMD, cmd);
-	
-	return 0;
-}
-
-/*
- * Function definitions
- */
-
-void hermes_struct_init(hermes_t *hw, ushort io)
-{
-	hw->iobase = io;
-	hw->inten = 0x0;
-}
-
-int hermes_reset(hermes_t *hw)
-{
-	uint16_t status, reg;
-	int err = 0;
-	int k;
-
-	/* We don't want to be interrupted while resetting the chipset */
-	hw->inten = 0x0;
-	hermes_write_regn(hw, INTEN, 0);
-	hermes_write_regn(hw, EVACK, 0xffff);
-
-	/* Because we hope we can reset the card even if it gets into
-	   a stupid state, we actually wait to see if the command
-	   register will unbusy itself */
-	k = CMD_BUSY_TIMEOUT;
-	reg = hermes_read_regn(hw, CMD);
-	while (k && (reg & HERMES_CMD_BUSY)) {
-		if (reg == 0xffff) /* Special case - the card has probably been removed,
-				      so don't wait for the timeout */
-			return -ENODEV;
-
-		k--;
-		udelay(1);
-		reg = hermes_read_regn(hw, CMD);
-	}
-	
-	/* No need to explicitly handle the timeout - hermes_issue_cmd() will
-	   probably return -EBUSY */
-
-	/* We don't use hermes_docmd_wait here, because the reset wipes
-	   the magic constant in SWSUPPORT0 away, and it gets confused */
-	err = hermes_issue_cmd(hw, HERMES_CMD_INIT, 0);
-	if (err)
-		return err;
-
-	reg = hermes_read_regn(hw, EVSTAT);
-	k = CMD_INIT_TIMEOUT;
-	while ( (! (reg & HERMES_EV_CMD)) && k) {
-		k--;
-		udelay(10);
-		reg = hermes_read_regn(hw, EVSTAT);
-	}
-
-	DEBUG(0, "Reset completed in %d iterations\n", CMD_INIT_TIMEOUT - k);
-
-	hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
-
-	if (! hermes_present(hw)) {
-		DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n",
-		       hw->iobase);
-		err = -ENODEV;
-		goto out;
-	}
-		
-	if (! (reg & HERMES_EV_CMD)) {
-		printk(KERN_ERR "hermes @ 0x%x: Timeout waiting for card to reset (reg=0x%04x)!\n",
-		       hw->iobase, reg);
-		err = -ETIMEDOUT;
-		goto out;
-	}
-
-	status = hermes_read_regn(hw, STATUS);
-
-	hermes_write_regn(hw, EVACK, HERMES_EV_CMD);
-
-	err = status & HERMES_STATUS_RESULT;
-
- out:
-	return err;
-}
-
-/* Issue a command to the chip, and (busy!) wait for it to
- * complete.
- *
- * Returns: < 0 on internal error, 0 on success, > 0 on error returned by the firmware
- *
- * Callable from any context, but locking is your problem. */
-int hermes_docmd_wait(hermes_t *hw, uint16_t cmd, uint16_t parm0, hermes_response_t *resp)
-{
-	int err;
-	int k;
-	uint16_t reg;
-
-	err = hermes_issue_cmd(hw, cmd, parm0);
-	if (err) {
-		if (! hermes_present(hw)) {
-			printk(KERN_WARNING "hermes @ 0x%x: Card removed while issuing command.\n",
-			       hw->iobase);
-			err = -ENODEV;
-		} else 
-			printk(KERN_ERR "hermes @ 0x%x: CMD register busy in hermes_issue_command().\n",
-			       hw->iobase);
-		goto out;
-	}
-
-	reg = hermes_read_regn(hw, EVSTAT);
-	k = CMD_COMPL_TIMEOUT;
-	while ( (! (reg & HERMES_EV_CMD)) && k) {
-		k--;
-		udelay(10);
-		reg = hermes_read_regn(hw, EVSTAT);
-	}
-
-	if (! hermes_present(hw)) {
-		printk(KERN_WARNING "hermes @ 0x%x: Card removed while waiting for command completion.\n",
-		       hw->iobase);
-		err = -ENODEV;
-		goto out;
-	}
-		
-	if (! (reg & HERMES_EV_CMD)) {
-		printk(KERN_ERR "hermes @ 0x%x: Timeout waiting for command completion.\n",
-		       hw->iobase);
-		err = -ETIMEDOUT;
-		goto out;
-	}
-
-	resp->status = hermes_read_regn(hw, STATUS);
-	resp->resp0 = hermes_read_regn(hw, RESP0);
-	resp->resp1 = hermes_read_regn(hw, RESP1);
-	resp->resp2 = hermes_read_regn(hw, RESP2);
-
-	hermes_write_regn(hw, EVACK, HERMES_EV_CMD);
-
-	err = resp->status & HERMES_STATUS_RESULT;
-
- out:
-	return err;
-}
-
-int hermes_allocate(hermes_t *hw, uint16_t size, uint16_t *fid)
-{
-	int err = 0;
-	hermes_response_t resp;
-	int k;
-	uint16_t reg;
-	
-	if ( (size < HERMES_ALLOC_LEN_MIN) || (size > HERMES_ALLOC_LEN_MAX) )
-		return -EINVAL;
-
-	err = hermes_docmd_wait(hw, HERMES_CMD_ALLOC, size, &resp);
-	if (err) {
-		printk(KERN_WARNING "hermes @ 0x%x: Frame allocation command failed (0x%X).\n",
-		       hw->iobase, err);
-		return err;
-	}
-
-	reg = hermes_read_regn(hw, EVSTAT);
-	k = ALLOC_COMPL_TIMEOUT;
-	while ( (! (reg & HERMES_EV_ALLOC)) && k) {
-		k--;
-		udelay(10);
-		reg = hermes_read_regn(hw, EVSTAT);
-	}
-	
-	if (! hermes_present(hw)) {
-		printk(KERN_WARNING "hermes @ 0x%x: Card removed waiting for frame allocation.\n",
-		       hw->iobase);
-		return -ENODEV;
-	}
-		
-	if (! (reg & HERMES_EV_ALLOC)) {
-		printk(KERN_ERR "hermes @ 0x%x: Timeout waiting for frame allocation\n",
-		       hw->iobase);
-		return -ETIMEDOUT;
-	}
-
-	*fid = hermes_read_regn(hw, ALLOCFID);
-	hermes_write_regn(hw, EVACK, HERMES_EV_ALLOC);
-	
-	return 0;
-}
-
-/* Set up a BAP to read a particular chunk of data from card's internal buffer.
- *
- * Returns: < 0 on internal failure (errno), 0 on success, >0 on error
- * from firmware
- *
- * Callable from any context */
-static int hermes_bap_seek(hermes_t *hw, int bap, uint16_t id, uint16_t offset)
-{
-	int sreg = bap ? HERMES_SELECT1 : HERMES_SELECT0;
-	int oreg = bap ? HERMES_OFFSET1 : HERMES_OFFSET0;
-	int k;
-	int l = BAP_ERROR_RETRY;
-	uint16_t reg;
-
-	/* Paranoia.. */
-	if ( (offset > HERMES_BAP_OFFSET_MAX) || (offset % 2) )
-		return -EINVAL;
-
-	k = BAP_BUSY_TIMEOUT;
-	reg = hermes_read_reg(hw, oreg);
-
-	if (reg & HERMES_OFFSET_BUSY)
-		return -EBUSY;
-
-	/* Now we actually set up the transfer */
- retry:
-	hermes_write_reg(hw, sreg, id);
-	hermes_write_reg(hw, oreg, offset);
-
-	/* Wait for the BAP to be ready */
-	k = BAP_BUSY_TIMEOUT;
-	reg = hermes_read_reg(hw, oreg);
-	while ( (reg & (HERMES_OFFSET_BUSY | HERMES_OFFSET_ERR)) && k) {
-		k--;
-		udelay(1);
-		reg = hermes_read_reg(hw, oreg);
-	}
-
-	if (reg & HERMES_OFFSET_BUSY)
-		return -ETIMEDOUT;
-
-	/* For some reason, seeking the BAP seems to randomly fail somewhere
-	   (firmware bug?). We retry a few times before giving up. */
-	if (reg & HERMES_OFFSET_ERR) {
-		if (l--) {
-			udelay(1);
-			goto retry;
-		} else
-			return -EIO;
-	}
-
-	return 0;
-}
-
-/* Read a block of data from the chip's buffer, via the
- * BAP. Synchronization/serialization is the caller's problem.  len
- * must be even.
- *
- * Returns: < 0 on internal failure (errno), 0 on success, > 0 on error from firmware
- */
-int hermes_bap_pread(hermes_t *hw, int bap, void *buf, uint16_t len,
-		     uint16_t id, uint16_t offset)
-{
-	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
-	int err = 0;
-
-	if (len % 2)
-		return -EINVAL;
-
-	err = hermes_bap_seek(hw, bap, id, offset);
-	if (err)
-		goto out;
-
-	/* Actually do the transfer */
-	hermes_read_data(hw, dreg, buf, len/2);
-
- out:
-	return err;
-}
-
-/* Write a block of data to the chip's buffer, via the
- * BAP. Synchronization/serialization is the caller's problem. len
- * must be even.
- *
- * Returns: < 0 on internal failure (errno), 0 on success, > 0 on error from firmware
- */
-int hermes_bap_pwrite(hermes_t *hw, int bap, const void *buf, uint16_t len,
-		      uint16_t id, uint16_t offset)
-{
-	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
-	int err = 0;
-
-	if (len % 2)
-		return -EINVAL;
-
-	err = hermes_bap_seek(hw, bap, id, offset);
-	if (err)
-		goto out;
-	
-	/* Actually do the transfer */
-	hermes_write_data(hw, dreg, buf, len/2);
-
- out:	
-	return err;
-}
-
-/* Read a Length-Type-Value record from the card.
- *
- * If length is NULL, we ignore the length read from the card, and
- * read the entire buffer regardless. This is useful because some of
- * the configuration records appear to have incorrect lengths in
- * practice.
- *
- * Callable from user or bh context.  */
-int hermes_read_ltv(hermes_t *hw, int bap, uint16_t rid, int buflen,
-		    uint16_t *length, void *buf)
-{
-	int err = 0;
-	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
-	uint16_t rlength, rtype;
-	hermes_response_t resp;
-	int count;
-
-	if (buflen % 2)
-		return -EINVAL;
-
-	err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS, rid, &resp);
-	if (err)
-		goto out;
-
-	err = hermes_bap_seek(hw, bap, rid, 0);
-	if (err)
-		goto out;
-
-	rlength = hermes_read_reg(hw, dreg);
-	rtype = hermes_read_reg(hw, dreg);
-
-	if (length)
-		*length = rlength;
-
-	if (rtype != rid)
-		printk(KERN_WARNING "hermes_read_ltv(): rid  (0x%04x) does "
-		       "not match type (0x%04x)\n", rid, rtype);
-	if (HERMES_RECLEN_TO_BYTES(rlength) > buflen)
-		printk(KERN_WARNING "hermes @ 0x%x: Truncating LTV record from %d to %d bytes. "
-		       "(rid=0x%04x, len=0x%04x)\n", hw->iobase,
-		       HERMES_RECLEN_TO_BYTES(rlength), buflen, rid, rlength);
-	
-	/* For now we always read the whole buffer, the
-	   lengths in the records seem to be wrong, frequently */
-	count = buflen / 2;
-
-#if 0
-	if (length)
-		count = (MIN(buflen, rlength) + 1) / 2;
-	else {
-		count = buflen / 2;
-		if (rlength != buflen)
-			printk(KERN_WARNING "hermes_read_ltv(): Incorrect \
-record length %d instead of %d on RID 0x%04x\n", rlength, buflen, rid);
-	}
-#endif
-	hermes_read_data(hw, dreg, buf, count);
-
- out:
-	return err;
-}
-
-int hermes_write_ltv(hermes_t *hw, int bap, uint16_t rid, 
-		     uint16_t length, const void *value)
-{
-	int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
-	int err = 0;
-	hermes_response_t resp;
-	int count;
-	
-	DEBUG(3, "write_ltv(): bap=%d rid=0x%04x length=%d (value=0x%04x)\n",
-	      bap, rid, length, * ((uint16_t *)value));
-
-	err = hermes_bap_seek(hw, bap, rid, 0);
-	if (err)
-		goto out;
-
-	hermes_write_reg(hw, dreg, length);
-	hermes_write_reg(hw, dreg, rid);
-
-	count = length - 1;
-
-	hermes_write_data(hw, dreg, value, count);
-
-	err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS | HERMES_CMD_WRITE, 
-				rid, &resp);
-
- out:
-	return err;
-}
-
-EXPORT_SYMBOL(hermes_struct_init);
-EXPORT_SYMBOL(hermes_reset);
-EXPORT_SYMBOL(hermes_docmd_wait);
-EXPORT_SYMBOL(hermes_allocate);
-
-EXPORT_SYMBOL(hermes_bap_pread);
-EXPORT_SYMBOL(hermes_bap_pwrite);
-EXPORT_SYMBOL(hermes_read_ltv);
-EXPORT_SYMBOL(hermes_write_ltv);
-
-static int __init init_hermes(void)
-{
-	printk(KERN_INFO "%s\n", version);
-
-	return 0;
-}
-
-module_init(init_hermes);