brcmsmac: hardware info in debugfs

Put basic information about hardware in debugfs.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Piotr Haber <phaber@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 144 insertions, 1 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/debug.c b/drivers/net/wireless/brcm80211/brcmsmac/debug.c
index 6ba4136c7cf6..be84791857cb 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/debug.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/debug.c
@@ -1,8 +1,121 @@
+/*
+ * Copyright (c) 2012 Broadcom Corporation
+ * Copyright (c) 2012 Canonical Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include <linux/debugfs.h>
+#include <linux/if_ether.h>
+#include <linux/if.h>
 #include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/ieee80211.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <net/mac80211.h>
+
+#include <defs.h>
+#include <brcmu_wifi.h>
+#include <brcmu_utils.h>
 #include "types.h"
+#include "main.h"
 #include "debug.h"
 #include "brcms_trace_events.h"
 
+static struct dentry *root_folder;
+
+void brcms_debugfs_init(void)
+{
+        root_folder = debugfs_create_dir(KBUILD_MODNAME, NULL);
+        if (IS_ERR(root_folder))
+                root_folder = NULL;
+}
+
+void brcms_debugfs_exit(void)
+{
+        if (!root_folder)
+                return;
+
+        debugfs_remove_recursive(root_folder);
+        root_folder = NULL;
+}
+
+int brcms_debugfs_attach(struct brcms_pub *drvr)
+{
+        if (!root_folder)
+                return -ENODEV;
+
+        drvr->dbgfs_dir = debugfs_create_dir(
+                 dev_name(&drvr->wlc->hw->d11core->dev), root_folder);
+        return PTR_RET(drvr->dbgfs_dir);
+}
+
+void brcms_debugfs_detach(struct brcms_pub *drvr)
+{
+        if (!IS_ERR_OR_NULL(drvr->dbgfs_dir))
+                debugfs_remove_recursive(drvr->dbgfs_dir);
+}
+
+struct dentry *brcms_debugfs_get_devdir(struct brcms_pub *drvr)
+{
+        return drvr->dbgfs_dir;
+}
+
+static
+ssize_t brcms_debugfs_hardware_read(struct file *f, char __user *data,
+                                        size_t count, loff_t *ppos)
+{
+        char buf[128];
+        int res;
+        struct brcms_pub *drvr = f->private_data;
+
+        /* only allow read from start */
+        if (*ppos > 0)
+                return 0;
+
+        res = scnprintf(buf, sizeof(buf),
+                "board vendor: %x\n"
+                "board type: %x\n"
+                "board revision: %x\n"
+                "board flags: %x\n"
+                "board flags2: %x\n"
+                "firmware revision: %x\n",
+                drvr->wlc->hw->d11core->bus->boardinfo.vendor,
+                drvr->wlc->hw->d11core->bus->boardinfo.type,
+                drvr->wlc->hw->boardrev,
+                drvr->wlc->hw->boardflags,
+                drvr->wlc->hw->boardflags2,
+                drvr->wlc->ucode_rev
+                );
+
+        return simple_read_from_buffer(data, count, ppos, buf, res);
+}
+
+static const struct file_operations brcms_debugfs_hardware_ops = {
+        .owner = THIS_MODULE,
+        .open = simple_open,
+        .read = brcms_debugfs_hardware_read
+};
+
+void brcms_debugfs_create_files(struct brcms_pub *drvr)
+{
+        struct dentry *dentry = drvr->dbgfs_dir;
+
+        if (!IS_ERR_OR_NULL(dentry))
+                debugfs_create_file("hardware", S_IRUGO, dentry,
+                                    drvr, &brcms_debugfs_hardware_ops);
+}
+
 #define __brcms_fn(fn)                                          \
 void __brcms_ ##fn(struct device *dev, const char *fmt, ...)    \
 {                                                               \
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/debug.h b/drivers/net/wireless/brcm80211/brcmsmac/debug.h
index f77066bda9d2..796836b0f469 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/debug.h
+++ b/drivers/net/wireless/brcm80211/brcmsmac/debug.h
@@ -1,3 +1,18 @@
+/*
+ * Copyright (c) 2012 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
 #ifndef _BRCMS_DEBUG_H_
 #define _BRCMS_DEBUG_H_
 
@@ -49,4 +64,12 @@ void __brcms_dbg(struct device *dev, u32 level, const char *func,
 #define brcms_dbg_dma(core, f, a...)            brcms_dbg(core, BRCM_DL_DMA, f, ##a)
 #define brcms_dbg_ht(core, f, a...)             brcms_dbg(core, BRCM_DL_HT, f, ##a)
 
+struct brcms_pub;
+void brcms_debugfs_init(void);
+void brcms_debugfs_exit(void);
+int brcms_debugfs_attach(struct brcms_pub *drvr);
+void brcms_debugfs_detach(struct brcms_pub *drvr);
+struct dentry *brcms_debugfs_get_devdir(struct brcms_pub *drvr);
+void brcms_debugfs_create_files(struct brcms_pub *drvr);
+
 #endif /* _BRCMS_DEBUG_H_ */
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
index 976720ccf17a..85dbaf8ac997 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
@@ -846,8 +846,10 @@ static void brcms_free(struct brcms_info *wl)
         /* kill dpc */
         tasklet_kill(&wl->tasklet);
 
-        if (wl->pub)
+        if (wl->pub) {
+                brcms_debugfs_detach(wl->pub);
                 brcms_c_module_unregister(wl->pub, "linux", wl);
+        }
 
         /* free common resources */
         if (wl->wlc) {
@@ -1077,6 +1079,8 @@ static struct brcms_info *brcms_attach(struct bcma_device *pdev)
             regulatory_hint(wl->wiphy, wl->pub->srom_ccode))
                 wiphy_err(wl->wiphy, "%s: regulatory hint failed\n", __func__);
 
+        brcms_debugfs_attach(wl->pub);
+        brcms_debugfs_create_files(wl->pub);
         n_adapters_found++;
         return wl;
 
@@ -1185,6 +1189,7 @@ static DECLARE_WORK(brcms_driver_work, brcms_driver_init);
 
 static int __init brcms_module_init(void)
 {
+        brcms_debugfs_init();
         if (!schedule_work(&brcms_driver_work))
                 return -EBUSY;
 
@@ -1202,6 +1207,7 @@ static void __exit brcms_module_exit(void)
 {
         cancel_work_sync(&brcms_driver_work);
         bcma_driver_unregister(&brcms_bcma_driver);
+        brcms_debugfs_exit();
 }
 
 module_init(brcms_module_init);
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/pub.h b/drivers/net/wireless/brcm80211/brcmsmac/pub.h
index 2aafe740ebd8..4fb2834f4e64 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/pub.h
+++ b/drivers/net/wireless/brcm80211/brcmsmac/pub.h
@@ -176,6 +176,7 @@ struct brcms_pub {
         bool phy_11ncapable;    /* the PHY/HW is capable of 802.11N */
 
         struct wl_cnt *_cnt;    /* low-level counters in driver */
+        struct dentry *dbgfs_dir;
 };
 
 enum wlc_par_id {