debugfs.c

linux内核源码

/*

  Broadcom B43 wireless driver

  debugfs driver debugging code

  Copyright (c) 2005-2007 Michael Buesch <[e-mail]>

  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; see the file COPYING.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  Boston, MA 02110-1301, USA.

*/

#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/mutex.h>

#include "b43.h"
#include "main.h"
#include "debugfs.h"
#include "dma.h"
#include "pio.h"
#include "xmit.h"


/* The root directory. */
static struct dentry *rootdir;

struct b43_debugfs_fops {
	ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize);
	int (*write)(struct b43_wldev *dev, const char *buf, size_t count);
	struct file_operations fops;
	/* Offset of struct b43_dfs_file in struct b43_dfsentry */
	size_t file_struct_offset;
	/* Take wl->irq_lock before calling read/write? */
	bool take_irqlock;
};

static inline
struct b43_dfs_file * fops_to_dfs_file(struct b43_wldev *dev,
				       const struct b43_debugfs_fops *dfops)
{
	void *p;

	p = dev->dfsentry;
	p += dfops->file_struct_offset;

	return p;
}


#define fappend(fmt, x...)	\
	do {							\
		if (bufsize - count)				\
			count += snprintf(buf + count,		\
					  bufsize - count,	\
					  fmt , ##x);		\
		else						\
			printk(KERN_ERR "b43: fappend overflow\n"); \
	} while (0)


/* wl->irq_lock is locked */
static ssize_t tsf_read_file(struct b43_wldev *dev,
			     char *buf, size_t bufsize)
{
	ssize_t count = 0;
	u64 tsf;

	b43_tsf_read(dev, &tsf);
	fappend("0x%08x%08x\n",
		(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
		(unsigned int)(tsf & 0xFFFFFFFFULL));

	return count;
}

/* wl->irq_lock is locked */
static int tsf_write_file(struct b43_wldev *dev,
			  const char *buf, size_t count)
{
	u64 tsf;

	if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
		return -EINVAL;
	b43_tsf_write(dev, tsf);

	return 0;
}

/* wl->irq_lock is locked */
static ssize_t ucode_regs_read_file(struct b43_wldev *dev,
				    char *buf, size_t bufsize)
{
	ssize_t count = 0;
	int i;

	for (i = 0; i < 64; i++) {
		fappend("r%d = 0x%04x\n", i,
			b43_shm_read16(dev, B43_SHM_SCRATCH, i));
	}

	return count;
}

/* wl->irq_lock is locked */
static ssize_t shm_read_file(struct b43_wldev *dev,
			     char *buf, size_t bufsize)
{
	ssize_t count = 0;
	int i;
	u16 tmp;
	__le16 *le16buf = (__le16 *)buf;

	for (i = 0; i < 0x1000; i++) {
		if (bufsize < sizeof(tmp))
			break;
		tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
		le16buf[i] = cpu_to_le16(tmp);
		count += sizeof(tmp);
		bufsize -= sizeof(tmp);
	}

	return count;
}

static ssize_t txstat_read_file(struct b43_wldev *dev,
				char *buf, size_t bufsize)
{
	struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
	ssize_t count = 0;
	unsigned long flags;
	int i, idx;
	struct b43_txstatus *stat;

	spin_lock_irqsave(&log->lock, flags);
	if (log->end < 0) {
		fappend("Nothing transmitted, yet\n");
		goto out_unlock;
	}
	fappend("b43 TX status reports:\n\n"
		"index | cookie | seq | phy_stat | frame_count | "
		"rts_count | supp_reason | pm_indicated | "
		"intermediate | for_ampdu | acked\n" "---\n");
	i = log->end + 1;
	idx = 0;
	while (1) {
		if (i == B43_NR_LOGGED_TXSTATUS)
			i = 0;
		stat = &(log->log[i]);
		if (stat->cookie) {
			fappend("%03d | "
				"0x%04X | 0x%04X | 0x%02X | "
				"0x%X | 0x%X | "
				"%u | %u | "
				"%u | %u | %u\n",
				idx,
				stat->cookie, stat->seq, stat->phy_stat,
				stat->frame_count, stat->rts_count,
				stat->supp_reason, stat->pm_indicated,
				stat->intermediate, stat->for_ampdu,
				stat->acked);
			idx++;
		}
		if (i == log->end)
			break;
		i++;
	}
out_unlock:
	spin_unlock_irqrestore(&log->lock, flags);

	return count;
}

static ssize_t txpower_g_read_file(struct b43_wldev *dev,
				   char *buf, size_t bufsize)
{
	ssize_t count = 0;

	if (dev->phy.type != B43_PHYTYPE_G) {
		fappend("Device is not a G-PHY\n");
		goto out;
	}
	fappend("Control:               %s\n", dev->phy.manual_txpower_control ?
		"MANUAL" : "AUTOMATIC");
	fappend("Baseband attenuation:  %u\n", dev->phy.bbatt.att);
	fappend("Radio attenuation:     %u\n", dev->phy.rfatt.att);
	fappend("TX Mixer Gain:         %s\n",
		(dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
	fappend("PA Gain 2dB:           %s\n",
		(dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
	fappend("PA Gain 3dB:           %s\n",
		(dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
	fappend("\n\n");
	fappend("You can write to this file:\n");
	fappend("Writing \"auto\" enables automatic txpower control.\n");
	fappend
	    ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
	     "enables manual txpower control.\n");
	fappend("Example: 5 4 0 0 1\n");
	fappend("Enables manual control with Baseband attenuation 5, "
		"Radio attenuation 4, No TX Mixer Gain, "
		"No PA Gain 2dB, With PA Gain 3dB.\n");
out:
	return count;
}

static int txpower_g_write_file(struct b43_wldev *dev,
				const char *buf, size_t count)
{
	unsigned long phy_flags;

	if (dev->phy.type != B43_PHYTYPE_G)
		return -ENODEV;
	if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
		/* Automatic control */
		dev->phy.manual_txpower_control = 0;
		b43_phy_xmitpower(dev);
	} else {
		int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
		/* Manual control */
		if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
			   &txmix, &pa2db, &pa3db) != 5)
			return -EINVAL;
		b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
		dev->phy.manual_txpower_control = 1;
		dev->phy.bbatt.att = bbatt;
		dev->phy.rfatt.att = rfatt;
		dev->phy.tx_control = 0;
		if (txmix)
			dev->phy.tx_control |= B43_TXCTL_TXMIX;
		if (pa2db)
			dev->phy.tx_control |= B43_TXCTL_PA2DB;
		if (pa3db)
			dev->phy.tx_control |= B43_TXCTL_PA3DB;
		b43_phy_lock(dev, phy_flags);
		b43_radio_lock(dev);
		b43_set_txpower_g(dev, &dev->phy.bbatt,
				  &dev->phy.rfatt, dev->phy.tx_control);
		b43_radio_unlock(dev);
		b43_phy_unlock(dev, phy_flags);
	}

	return 0;
}

/* wl->irq_lock is locked */
static int restart_write_file(struct b43_wldev *dev,
			      const char *buf, size_t count)
{
	int err = 0;

	if (count > 0 && buf[0] == '1') {
		b43_controller_restart(dev, "manually restarted");
	} else
		err = -EINVAL;

	return err;
}

static ssize_t append_lo_table(ssize_t count, char *buf, const size_t bufsize,
			       struct b43_loctl table[B43_NR_BB][B43_NR_RF])
{
	unsigned int i, j;
	struct b43_loctl *ctl;

	for (i = 0; i < B43_NR_BB; i++) {
		for (j = 0; j < B43_NR_RF; j++) {
			ctl = &(table[i][j]);
			fappend("(bbatt %2u, rfatt %2u)  ->  "
				"(I %+3d, Q %+3d, Used: %d, Calibrated: %d)\n",
				i, j, ctl->i, ctl->q,
				ctl->used,
				b43_loctl_is_calibrated(ctl));
		}
	}

	return count;
}

static ssize_t loctls_read_file(struct b43_wldev *dev,
				char *buf, size_t bufsize)
{
	ssize_t count = 0;
	struct b43_txpower_lo_control *lo;
	int i, err = 0;

	if (dev->phy.type != B43_PHYTYPE_G) {
		fappend("Device is not a G-PHY\n");
		err = -ENODEV;
		goto out;
	}
	lo = dev->phy.lo_control;
	fappend("-- Local Oscillator calibration data --\n\n");
	fappend("Measured: %d,  Rebuild: %d,  HW-power-control: %d\n",
		lo->lo_measured,
		lo->rebuild,
		dev->phy.hardware_power_control);
	fappend("TX Bias: 0x%02X,  TX Magn: 0x%02X\n",
		lo->tx_bias, lo->tx_magn);
	fappend("Power Vector: 0x%08X%08X\n",
		(unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
		(unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL));
	fappend("\nControl table WITH PADMIX:\n");
	count = append_lo_table(count, buf, bufsize, lo->with_padmix);
	fappend("\nControl table WITHOUT PADMIX:\n");
	count = append_lo_table(count, buf, bufsize, lo->no_padmix);
	fappend("\nUsed RF attenuation values:  Value(WithPadmix flag)\n");
	for (i = 0; i < lo->rfatt_list.len; i++) {
		fappend("%u(%d), ",
			lo->rfatt_list.list[i].att,
			lo->rfatt_list.list[i].with_padmix);
	}
	fappend("\n");