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path: root/drivers/net/can/old/sja1000/proc.c
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Diffstat (limited to 'drivers/net/can/old/sja1000/proc.c')
-rw-r--r--drivers/net/can/old/sja1000/proc.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/drivers/net/can/old/sja1000/proc.c b/drivers/net/can/old/sja1000/proc.c
new file mode 100644
index 000000000000..b98aa6180784
--- /dev/null
+++ b/drivers/net/can/old/sja1000/proc.c
@@ -0,0 +1,230 @@
+/*
+ * proc.c - proc file system functions for SJA1000 CAN driver.
+ *
+ * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Volkswagen nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * Alternatively, provided that this notice is retained in full, this
+ * software may be distributed under the terms of the GNU General
+ * Public License ("GPL") version 2, in which case the provisions of the
+ * GPL apply INSTEAD OF those given above.
+ *
+ * The provided data structures and external interfaces from this code
+ * are not restricted to be used by modules with a GPL compatible license.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * Send feedback to <socketcan-users@lists.berlios.de>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/netdevice.h>
+
+#include <linux/can.h>
+#include <linux/can/ioctl.h>
+#include "sja1000.h"
+#include "hal.h"
+
+extern struct net_device *can_dev[];
+
+static struct proc_dir_entry *pde = NULL;
+static struct proc_dir_entry *pde_regs = NULL;
+static struct proc_dir_entry *pde_reset = NULL;
+
+static int can_proc_read_stats(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = 0;
+ int i;
+
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "CAN bus device statistics:\n");
+ len += snprintf(page + len, PAGE_SIZE - len,
+ " errwarn overrun wakeup buserr "
+ "errpass arbitr restarts clock baud\n");
+ for (i = 0; (i < MAXDEV) && (len < PAGE_SIZE - 200); i++) {
+ if (can_dev[i]) {
+ struct net_device *dev = can_dev[i];
+ struct can_priv *priv = netdev_priv(dev);
+#ifdef SJA1000_H
+ u8 stat = hw_readreg(dev->base_addr, REG_SR);
+
+ if (stat & 0x80) {
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "%s: bus status: "
+ "BUS OFF, ", dev->name);
+ } else if (stat & 0x40) {
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "%s: bus status: ERROR "
+ "PASSIVE, ", dev->name);
+ } else {
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "%s: bus status: OK, ",
+ dev->name);
+ }
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "RXERR: %d, TXERR: %d\n",
+ hw_readreg(dev->base_addr, REG_RXERR),
+ hw_readreg(dev->base_addr, REG_TXERR));
+#endif
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "%s: %8d %8d %8d %8d %8d "
+ "%8d %8d %10d %8d\n", dev->name,
+ priv->can_stats.error_warning,
+ priv->can_stats.data_overrun,
+ priv->can_stats.wakeup,
+ priv->can_stats.bus_error,
+ priv->can_stats.error_passive,
+ priv->can_stats.arbitration_lost,
+ priv->can_stats.restarts,
+ priv->clock,
+ priv->speed
+ );
+
+ }
+ }
+
+ *eof = 1;
+ return len;
+}
+
+
+static int can_proc_dump_regs(char *page, int len, struct net_device *dev)
+{
+ int r,s;
+ struct can_priv *priv = netdev_priv(dev);
+ int regs = priv->hw_regs;
+
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "%s registers:\n", dev->name);
+
+ for (r = 0; r < regs; r += 0x10) {
+ len += snprintf(page + len, PAGE_SIZE - len, "%02X: ", r);
+ for (s = 0; s < 0x10; s++) {
+ if (r+s < regs)
+ len += snprintf(page + len, PAGE_SIZE-len,
+ "%02X ",
+ hw_readreg(dev->base_addr,
+ r+s));
+ }
+ len += snprintf(page + len, PAGE_SIZE - len, "\n");
+ }
+
+ return len;
+}
+
+static int can_proc_read_regs(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = 0;
+ int i;
+
+ for (i = 0; (i < MAXDEV) && (len < PAGE_SIZE - 200); i++) {
+ if (can_dev[i])
+ len = can_proc_dump_regs(page, len, can_dev[i]);
+ }
+
+ *eof = 1;
+ return len;
+}
+
+static int can_proc_read_reset(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int len = 0;
+ struct net_device *dev;
+ int i;
+ struct can_priv *priv;
+
+ len += snprintf(page + len, PAGE_SIZE - len, "resetting ");
+ for (i = 0; (i < MAXDEV) && (len < PAGE_SIZE - 200); i++) {
+ if (can_dev[i]) {
+ dev = can_dev[i];
+ priv = netdev_priv(can_dev[i]);
+ if ((priv->state != STATE_UNINITIALIZED)
+ && (priv->state != STATE_RESET_MODE)) {
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "%s ", dev->name);
+ dev->stop(dev);
+ dev->open(dev);
+ /* count number of restarts */
+ priv->can_stats.restarts++;
+
+ } else {
+ len += snprintf(page + len, PAGE_SIZE - len,
+ "(%s|%d) ", dev->name,
+ priv->state);
+ }
+ }
+ }
+
+ len += snprintf(page + len, PAGE_SIZE - len, "done\n");
+
+ *eof = 1;
+ return len;
+}
+
+void can_proc_create(const char *drv_name)
+{
+ char fname[256];
+
+ if (pde == NULL) {
+ sprintf(fname, PROCBASE "/%s_stats", drv_name);
+ pde = create_proc_read_entry(fname, 0644, NULL,
+ can_proc_read_stats, NULL);
+ }
+ if (pde_regs == NULL) {
+ sprintf(fname, PROCBASE "/%s_regs", drv_name);
+ pde_regs = create_proc_read_entry(fname, 0644, NULL,
+ can_proc_read_regs, NULL);
+ }
+ if (pde_reset == NULL) {
+ sprintf(fname, PROCBASE "/%s_reset", drv_name);
+ pde_reset = create_proc_read_entry(fname, 0644, NULL,
+ can_proc_read_reset, NULL);
+ }
+}
+
+void can_proc_remove(const char *drv_name)
+{
+ char fname[256];
+
+ if (pde) {
+ sprintf(fname, PROCBASE "/%s_stats", drv_name);
+ remove_proc_entry(fname, NULL);
+ }
+ if (pde_regs) {
+ sprintf(fname, PROCBASE "/%s_regs", drv_name);
+ remove_proc_entry(fname, NULL);
+ }
+ if (pde_reset) {
+ sprintf(fname, PROCBASE "/%s_reset", drv_name);
+ remove_proc_entry(fname, NULL);
+ }
+}
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