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Diffstat (limited to 'kernel/drivers/usb/musb/musb_debugfs.c')
-rw-r--r--kernel/drivers/usb/musb/musb_debugfs.c281
1 files changed, 281 insertions, 0 deletions
diff --git a/kernel/drivers/usb/musb/musb_debugfs.c b/kernel/drivers/usb/musb/musb_debugfs.c
new file mode 100644
index 000000000..78a283e9c
--- /dev/null
+++ b/kernel/drivers/usb/musb/musb_debugfs.c
@@ -0,0 +1,281 @@
+/*
+ * 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/init.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include <asm/uaccess.h>
+
+#include "musb_core.h"
+#include "musb_debug.h"
+
+struct musb_register_map {
+ char *name;
+ unsigned offset;
+ unsigned size;
+};
+
+static const struct musb_register_map musb_regmap[] = {
+ { "FAddr", MUSB_FADDR, 8 },
+ { "Power", MUSB_POWER, 8 },
+ { "Frame", MUSB_FRAME, 16 },
+ { "Index", MUSB_INDEX, 8 },
+ { "Testmode", MUSB_TESTMODE, 8 },
+ { "TxMaxPp", MUSB_TXMAXP, 16 },
+ { "TxCSRp", MUSB_TXCSR, 16 },
+ { "RxMaxPp", MUSB_RXMAXP, 16 },
+ { "RxCSR", MUSB_RXCSR, 16 },
+ { "RxCount", MUSB_RXCOUNT, 16 },
+ { "IntrRxE", MUSB_INTRRXE, 16 },
+ { "IntrTxE", MUSB_INTRTXE, 16 },
+ { "IntrUsbE", MUSB_INTRUSBE, 8 },
+ { "DevCtl", MUSB_DEVCTL, 8 },
+ { "VControl", 0x68, 32 },
+ { "HWVers", 0x69, 16 },
+ { "LinkInfo", MUSB_LINKINFO, 8 },
+ { "VPLen", MUSB_VPLEN, 8 },
+ { "HS_EOF1", MUSB_HS_EOF1, 8 },
+ { "FS_EOF1", MUSB_FS_EOF1, 8 },
+ { "LS_EOF1", MUSB_LS_EOF1, 8 },
+ { "SOFT_RST", 0x7F, 8 },
+ { "DMA_CNTLch0", 0x204, 16 },
+ { "DMA_ADDRch0", 0x208, 32 },
+ { "DMA_COUNTch0", 0x20C, 32 },
+ { "DMA_CNTLch1", 0x214, 16 },
+ { "DMA_ADDRch1", 0x218, 32 },
+ { "DMA_COUNTch1", 0x21C, 32 },
+ { "DMA_CNTLch2", 0x224, 16 },
+ { "DMA_ADDRch2", 0x228, 32 },
+ { "DMA_COUNTch2", 0x22C, 32 },
+ { "DMA_CNTLch3", 0x234, 16 },
+ { "DMA_ADDRch3", 0x238, 32 },
+ { "DMA_COUNTch3", 0x23C, 32 },
+ { "DMA_CNTLch4", 0x244, 16 },
+ { "DMA_ADDRch4", 0x248, 32 },
+ { "DMA_COUNTch4", 0x24C, 32 },
+ { "DMA_CNTLch5", 0x254, 16 },
+ { "DMA_ADDRch5", 0x258, 32 },
+ { "DMA_COUNTch5", 0x25C, 32 },
+ { "DMA_CNTLch6", 0x264, 16 },
+ { "DMA_ADDRch6", 0x268, 32 },
+ { "DMA_COUNTch6", 0x26C, 32 },
+ { "DMA_CNTLch7", 0x274, 16 },
+ { "DMA_ADDRch7", 0x278, 32 },
+ { "DMA_COUNTch7", 0x27C, 32 },
+#ifndef CONFIG_BLACKFIN
+ { "ConfigData", MUSB_CONFIGDATA,8 },
+ { "BabbleCtl", MUSB_BABBLE_CTL,8 },
+ { "TxFIFOsz", MUSB_TXFIFOSZ, 8 },
+ { "RxFIFOsz", MUSB_RXFIFOSZ, 8 },
+ { "TxFIFOadd", MUSB_TXFIFOADD, 16 },
+ { "RxFIFOadd", MUSB_RXFIFOADD, 16 },
+ { "EPInfo", MUSB_EPINFO, 8 },
+ { "RAMInfo", MUSB_RAMINFO, 8 },
+#endif
+ { } /* Terminating Entry */
+};
+
+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)
+{
+ 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 seq_file *s = file->private_data;
+ struct musb *musb = s->private;
+ 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 (strstarts(buf, "force host"))
+ test = MUSB_TEST_FORCE_HOST;
+
+ if (strstarts(buf, "fifo access"))
+ test = MUSB_TEST_FIFO_ACCESS;
+
+ if (strstarts(buf, "force full-speed"))
+ test = MUSB_TEST_FORCE_FS;
+
+ if (strstarts(buf, "force high-speed"))
+ test = MUSB_TEST_FORCE_HS;
+
+ if (strstarts(buf, "test packet")) {
+ test = MUSB_TEST_PACKET;
+ musb_load_testpacket(musb);
+ }
+
+ if (strstarts(buf, "test K"))
+ test = MUSB_TEST_K;
+
+ if (strstarts(buf, "test J"))
+ test = MUSB_TEST_J;
+
+ if (strstarts(buf, "test SE0 NAK"))
+ 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 musb_init_debugfs(struct musb *musb)
+{
+ struct dentry *root;
+ struct dentry *file;
+ int ret;
+
+ root = debugfs_create_dir(dev_name(musb->controller), NULL);
+ if (!root) {
+ ret = -ENOMEM;
+ goto err0;
+ }
+
+ file = debugfs_create_file("regdump", S_IRUGO, root, musb,
+ &musb_regdump_fops);
+ if (!file) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
+ root, musb, &musb_test_mode_fops);
+ if (!file) {
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ musb->debugfs_root = root;
+
+ return 0;
+
+err1:
+ debugfs_remove_recursive(root);
+
+err0:
+ return ret;
+}
+
+void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
+{
+ debugfs_remove_recursive(musb->debugfs_root);
+}