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authorFelipe Balbi <felipe.balbi@nokia.com>2010-03-12 10:29:11 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-20 13:21:32 -0700
commit7f7f9e2a5af9e30c6a0c6743ac874f67e2ef4b72 (patch)
tree3d7fae6e559868e3ac110b3973650198458a815e /drivers/usb/musb/musb_debugfs.c
parent6ddc6dae4ab559b648bc348e3a48e113e92ab4a2 (diff)
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usb: musb: add debugfs support
for now only a simple register dump entry (which can be rather useful on debugging) and a way to start test modes. Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/musb/musb_debugfs.c')
-rw-r--r--drivers/usb/musb/musb_debugfs.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
new file mode 100644
index 00000000000..b6a27bab223
--- /dev/null
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -0,0 +1,295 @@
+/*
+ * MUSB OTG driver debugfs support
+ *
+ * Copyright 2010 Nokia Corporation
+ * Contact: Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ * THIS SOFTWARE IS PROVIDED "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 AUTHORS 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/kobject.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#ifdef CONFIG_ARM
+#include <mach/hardware.h>
+#include <mach/memory.h>
+#include <asm/mach-types.h>
+#endif
+
+#include <asm/uaccess.h>
+
+#include "musb_core.h"
+#include "musb_debug.h"
+
+#ifdef CONFIG_ARCH_DAVINCI
+#include "davinci.h"
+#endif
+
+struct musb_register_map {
+ char *name;
+ unsigned offset;
+ unsigned size;
+};
+
+static const struct musb_register_map musb_regmap[] = {
+ { "FAddr", 0x00, 8 },
+ { "Power", 0x01, 8 },
+ { "Frame", 0x0c, 16 },
+ { "Index", 0x0e, 8 },
+ { "Testmode", 0x0f, 8 },
+ { "TxMaxPp", 0x10, 16 },
+ { "TxCSRp", 0x12, 16 },
+ { "RxMaxPp", 0x14, 16 },
+ { "RxCSR", 0x16, 16 },
+ { "RxCount", 0x18, 16 },
+ { "ConfigData", 0x1f, 8 },
+ { "DevCtl", 0x60, 8 },
+ { "MISC", 0x61, 8 },
+ { "TxFIFOsz", 0x62, 8 },
+ { "RxFIFOsz", 0x63, 8 },
+ { "TxFIFOadd", 0x64, 16 },
+ { "RxFIFOadd", 0x66, 16 },
+ { "VControl", 0x68, 32 },
+ { "HWVers", 0x6C, 16 },
+ { "EPInfo", 0x78, 8 },
+ { "RAMInfo", 0x79, 8 },
+ { "LinkInfo", 0x7A, 8 },
+ { "VPLen", 0x7B, 8 },
+ { "HS_EOF1", 0x7C, 8 },
+ { "FS_EOF1", 0x7D, 8 },
+ { "LS_EOF1", 0x7E, 8 },
+ { "SOFT_RST", 0x7F, 8 },
+ { "DMA_CNTLch0", 0x204, 16 },
+ { "DMA_ADDRch0", 0x208, 16 },
+ { "DMA_COUNTch0", 0x20C, 16 },
+ { "DMA_CNTLch1", 0x214, 16 },
+ { "DMA_ADDRch1", 0x218, 16 },
+ { "DMA_COUNTch1", 0x21C, 16 },
+ { "DMA_CNTLch2", 0x224, 16 },
+ { "DMA_ADDRch2", 0x228, 16 },
+ { "DMA_COUNTch2", 0x22C, 16 },
+ { "DMA_CNTLch3", 0x234, 16 },
+ { "DMA_ADDRch3", 0x238, 16 },
+ { "DMA_COUNTch3", 0x23C, 16 },
+ { "DMA_CNTLch4", 0x244, 16 },
+ { "DMA_ADDRch4", 0x248, 16 },
+ { "DMA_COUNTch4", 0x24C, 16 },
+ { "DMA_CNTLch5", 0x254, 16 },
+ { "DMA_ADDRch5", 0x258, 16 },
+ { "DMA_COUNTch5", 0x25C, 16 },
+ { "DMA_CNTLch6", 0x264, 16 },
+ { "DMA_ADDRch6", 0x268, 16 },
+ { "DMA_COUNTch6", 0x26C, 16 },
+ { "DMA_CNTLch7", 0x274, 16 },
+ { "DMA_ADDRch7", 0x278, 16 },
+ { "DMA_COUNTch7", 0x27C, 16 },
+ { } /* Terminating Entry */
+};
+
+static struct dentry *musb_debugfs_root;
+
+static int musb_regdump_show(struct seq_file *s, void *unused)
+{
+ struct musb *musb = s->private;
+ unsigned i;
+
+ seq_printf(s, "MUSB (M)HDRC Register Dump\n");
+
+ for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
+ switch (musb_regmap[i].size) {
+ case 8:
+ seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
+ musb_readb(musb->mregs, musb_regmap[i].offset));
+ break;
+ case 16:
+ seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
+ musb_readw(musb->mregs, musb_regmap[i].offset));
+ break;
+ case 32:
+ seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
+ musb_readl(musb->mregs, musb_regmap[i].offset));
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int musb_regdump_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, musb_regdump_show, inode->i_private);
+}
+
+static int musb_test_mode_show(struct seq_file *s, void *unused)
+{
+ struct musb *musb = s->private;
+ unsigned test;
+
+ test = musb_readb(musb->mregs, MUSB_TESTMODE);
+
+ if (test & MUSB_TEST_FORCE_HOST)
+ seq_printf(s, "force host\n");
+
+ if (test & MUSB_TEST_FIFO_ACCESS)
+ seq_printf(s, "fifo access\n");
+
+ if (test & MUSB_TEST_FORCE_FS)
+ seq_printf(s, "force full-speed\n");
+
+ if (test & MUSB_TEST_FORCE_HS)
+ seq_printf(s, "force high-speed\n");
+
+ if (test & MUSB_TEST_PACKET)
+ seq_printf(s, "test packet\n");
+
+ if (test & MUSB_TEST_K)
+ seq_printf(s, "test K\n");
+
+ if (test & MUSB_TEST_J)
+ seq_printf(s, "test J\n");
+
+ if (test & MUSB_TEST_SE0_NAK)
+ seq_printf(s, "test SE0 NAK\n");
+
+ return 0;
+}
+
+static const struct file_operations musb_regdump_fops = {
+ .open = musb_regdump_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int musb_test_mode_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+
+ return single_open(file, musb_test_mode_show, inode->i_private);
+}
+
+static ssize_t musb_test_mode_write(struct file *file,
+ const char __user *ubuf, size_t count, loff_t *ppos)
+{
+ struct musb *musb = file->private_data;
+ u8 test = 0;
+ char buf[18];
+
+ memset(buf, 0x00, sizeof(buf));
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "force host", 9))
+ test = MUSB_TEST_FORCE_HOST;
+
+ if (!strncmp(buf, "fifo access", 11))
+ test = MUSB_TEST_FIFO_ACCESS;
+
+ if (!strncmp(buf, "force full-speed", 15))
+ test = MUSB_TEST_FORCE_FS;
+
+ if (!strncmp(buf, "force high-speed", 15))
+ test = MUSB_TEST_FORCE_HS;
+
+ if (!strncmp(buf, "test packet", 10)) {
+ test = MUSB_TEST_PACKET;
+ musb_load_testpacket(musb);
+ }
+
+ if (!strncmp(buf, "test K", 6))
+ test = MUSB_TEST_K;
+
+ if (!strncmp(buf, "test J", 6))
+ test = MUSB_TEST_J;
+
+ if (!strncmp(buf, "test SE0 NAK", 12))
+ test = MUSB_TEST_SE0_NAK;
+
+ musb_writeb(musb->mregs, MUSB_TESTMODE, test);
+
+ return count;
+}
+
+static const struct file_operations musb_test_mode_fops = {
+ .open = musb_test_mode_open,
+ .write = musb_test_mode_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+int __init musb_init_debugfs(struct musb *musb)
+{
+ struct dentry *root;
+ struct dentry *file;
+ int ret;
+
+ root = debugfs_create_dir("musb", NULL);
+ if (IS_ERR(root)) {
+ ret = PTR_ERR(root);
+ goto err0;
+ }
+
+ file = debugfs_create_file("regdump", S_IRUGO, root, musb,
+ &musb_regdump_fops);
+ if (IS_ERR(file)) {
+ ret = PTR_ERR(file);
+ goto err1;
+ }
+
+ file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
+ root, musb, &musb_test_mode_fops);
+ if (IS_ERR(file)) {
+ ret = PTR_ERR(file);
+ goto err1;
+ }
+
+ musb_debugfs_root = root;
+
+ return 0;
+
+err1:
+ debugfs_remove_recursive(root);
+
+err0:
+ return ret;
+}
+
+void __exit musb_exit_debugfs(struct musb *musb)
+{
+ debugfs_remove_recursive(musb_debugfs_root);
+}