78ff56a06e
Redesign the bcm43xx locking. This is pre-work to get a preemptible periodic work handler. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
335 lines
7.4 KiB
C
335 lines
7.4 KiB
C
/*
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Broadcom BCM43xx wireless driver
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SYSFS support routines
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Copyright (c) 2006 Michael Buesch <mbuesch@freenet.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "bcm43xx_sysfs.h"
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#include "bcm43xx.h"
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#include "bcm43xx_main.h"
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#include "bcm43xx_radio.h"
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#include <linux/capability.h>
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#define GENERIC_FILESIZE 64
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static int get_integer(const char *buf, size_t count)
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{
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char tmp[10 + 1] = { 0 };
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int ret = -EINVAL;
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if (count == 0)
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goto out;
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count = min(count, (size_t)10);
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memcpy(tmp, buf, count);
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ret = simple_strtol(tmp, NULL, 10);
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out:
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return ret;
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}
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static int get_boolean(const char *buf, size_t count)
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{
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if (count != 0) {
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if (buf[0] == '1')
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return 1;
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if (buf[0] == '0')
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return 0;
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if (count >= 4 && memcmp(buf, "true", 4) == 0)
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return 1;
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if (count >= 5 && memcmp(buf, "false", 5) == 0)
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return 0;
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if (count >= 3 && memcmp(buf, "yes", 3) == 0)
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return 1;
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if (count >= 2 && memcmp(buf, "no", 2) == 0)
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return 0;
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if (count >= 2 && memcmp(buf, "on", 2) == 0)
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return 1;
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if (count >= 3 && memcmp(buf, "off", 3) == 0)
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return 0;
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}
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return -EINVAL;
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}
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static int sprom2hex(const u16 *sprom, char *buf, size_t buf_len)
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{
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int i, pos = 0;
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for (i = 0; i < BCM43xx_SPROM_SIZE; i++) {
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pos += snprintf(buf + pos, buf_len - pos - 1,
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"%04X", swab16(sprom[i]) & 0xFFFF);
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}
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pos += snprintf(buf + pos, buf_len - pos - 1, "\n");
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return pos + 1;
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}
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static int hex2sprom(u16 *sprom, const char *dump, size_t len)
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{
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char tmp[5] = { 0 };
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int cnt = 0;
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unsigned long parsed;
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if (len < BCM43xx_SPROM_SIZE * sizeof(u16) * 2)
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return -EINVAL;
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while (cnt < BCM43xx_SPROM_SIZE) {
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memcpy(tmp, dump, 4);
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dump += 4;
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parsed = simple_strtoul(tmp, NULL, 16);
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sprom[cnt++] = swab16((u16)parsed);
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}
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return 0;
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}
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static ssize_t bcm43xx_attr_sprom_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct bcm43xx_private *bcm = dev_to_bcm(dev);
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u16 *sprom;
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unsigned long flags;
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int err;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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assert(BCM43xx_SPROM_SIZE * sizeof(u16) <= PAGE_SIZE);
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sprom = kmalloc(BCM43xx_SPROM_SIZE * sizeof(*sprom),
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GFP_KERNEL);
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if (!sprom)
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return -ENOMEM;
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bcm43xx_lock_irqsafe(bcm, flags);
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err = bcm43xx_sprom_read(bcm, sprom);
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if (!err)
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err = sprom2hex(sprom, buf, PAGE_SIZE);
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mmiowb();
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bcm43xx_unlock_irqsafe(bcm, flags);
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kfree(sprom);
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return err;
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}
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static ssize_t bcm43xx_attr_sprom_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct bcm43xx_private *bcm = dev_to_bcm(dev);
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u16 *sprom;
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unsigned long flags;
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int err;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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sprom = kmalloc(BCM43xx_SPROM_SIZE * sizeof(*sprom),
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GFP_KERNEL);
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if (!sprom)
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return -ENOMEM;
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err = hex2sprom(sprom, buf, count);
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if (err)
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goto out_kfree;
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bcm43xx_lock_irqsafe(bcm, flags);
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err = bcm43xx_sprom_write(bcm, sprom);
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mmiowb();
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bcm43xx_unlock_irqsafe(bcm, flags);
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out_kfree:
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kfree(sprom);
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return err ? err : count;
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}
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static DEVICE_ATTR(sprom, 0600,
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bcm43xx_attr_sprom_show,
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bcm43xx_attr_sprom_store);
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static ssize_t bcm43xx_attr_interfmode_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct bcm43xx_private *bcm = dev_to_bcm(dev);
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int err;
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ssize_t count = 0;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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bcm43xx_lock_noirq(bcm);
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switch (bcm43xx_current_radio(bcm)->interfmode) {
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case BCM43xx_RADIO_INTERFMODE_NONE:
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count = snprintf(buf, PAGE_SIZE, "0 (No Interference Mitigation)\n");
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break;
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case BCM43xx_RADIO_INTERFMODE_NONWLAN:
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count = snprintf(buf, PAGE_SIZE, "1 (Non-WLAN Interference Mitigation)\n");
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break;
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case BCM43xx_RADIO_INTERFMODE_MANUALWLAN:
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count = snprintf(buf, PAGE_SIZE, "2 (WLAN Interference Mitigation)\n");
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break;
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default:
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assert(0);
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}
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err = 0;
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bcm43xx_unlock_noirq(bcm);
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return err ? err : count;
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}
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static ssize_t bcm43xx_attr_interfmode_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct bcm43xx_private *bcm = dev_to_bcm(dev);
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unsigned long flags;
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int err;
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int mode;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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mode = get_integer(buf, count);
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switch (mode) {
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case 0:
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mode = BCM43xx_RADIO_INTERFMODE_NONE;
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break;
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case 1:
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mode = BCM43xx_RADIO_INTERFMODE_NONWLAN;
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break;
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case 2:
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mode = BCM43xx_RADIO_INTERFMODE_MANUALWLAN;
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break;
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case 3:
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mode = BCM43xx_RADIO_INTERFMODE_AUTOWLAN;
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break;
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default:
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return -EINVAL;
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}
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bcm43xx_lock_irqsafe(bcm, flags);
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err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
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if (err) {
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printk(KERN_ERR PFX "Interference Mitigation not "
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"supported by device\n");
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}
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mmiowb();
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bcm43xx_unlock_irqsafe(bcm, flags);
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return err ? err : count;
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}
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static DEVICE_ATTR(interference, 0644,
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bcm43xx_attr_interfmode_show,
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bcm43xx_attr_interfmode_store);
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static ssize_t bcm43xx_attr_preamble_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct bcm43xx_private *bcm = dev_to_bcm(dev);
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int err;
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ssize_t count;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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bcm43xx_lock_noirq(bcm);
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if (bcm->short_preamble)
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count = snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n");
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else
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count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n");
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err = 0;
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bcm43xx_unlock_noirq(bcm);
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return err ? err : count;
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}
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static ssize_t bcm43xx_attr_preamble_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct bcm43xx_private *bcm = dev_to_bcm(dev);
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unsigned long flags;
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int err;
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int value;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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value = get_boolean(buf, count);
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if (value < 0)
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return value;
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bcm43xx_lock_irqsafe(bcm, flags);
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bcm->short_preamble = !!value;
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err = 0;
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bcm43xx_unlock_irqsafe(bcm, flags);
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return err ? err : count;
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}
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static DEVICE_ATTR(shortpreamble, 0644,
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bcm43xx_attr_preamble_show,
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bcm43xx_attr_preamble_store);
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int bcm43xx_sysfs_register(struct bcm43xx_private *bcm)
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{
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struct device *dev = &bcm->pci_dev->dev;
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int err;
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assert(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
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err = device_create_file(dev, &dev_attr_sprom);
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if (err)
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goto out;
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err = device_create_file(dev, &dev_attr_interference);
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if (err)
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goto err_remove_sprom;
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err = device_create_file(dev, &dev_attr_shortpreamble);
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if (err)
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goto err_remove_interfmode;
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out:
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return err;
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err_remove_interfmode:
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device_remove_file(dev, &dev_attr_interference);
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err_remove_sprom:
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device_remove_file(dev, &dev_attr_sprom);
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goto out;
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}
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void bcm43xx_sysfs_unregister(struct bcm43xx_private *bcm)
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{
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struct device *dev = &bcm->pci_dev->dev;
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device_remove_file(dev, &dev_attr_shortpreamble);
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device_remove_file(dev, &dev_attr_interference);
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device_remove_file(dev, &dev_attr_sprom);
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}
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