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path: root/drivers/usb/musb/musb_debugfs.c
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Diffstat (limited to 'drivers/usb/musb/musb_debugfs.c')
-rw-r--r--drivers/usb/musb/musb_debugfs.c282
1 files changed, 171 insertions, 111 deletions
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index 4c216790e86b..5092d62c2062 100644
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -1,34 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* 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>
@@ -37,7 +12,7 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "musb_core.h"
#include "musb_debug.h"
@@ -49,33 +24,28 @@ struct musb_register_map {
};
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 },
+ { "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", MUSB_HWVERS, 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 },
@@ -100,6 +70,14 @@ static const struct musb_register_map musb_regmap[] = {
{ "DMA_CNTLch7", 0x274, 16 },
{ "DMA_ADDRch7", 0x278, 32 },
{ "DMA_COUNTch7", 0x27C, 32 },
+ { "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 },
{ } /* Terminating Entry */
};
@@ -109,6 +87,7 @@ static int musb_regdump_show(struct seq_file *s, void *unused)
unsigned i;
seq_printf(s, "MUSB (M)HDRC Register Dump\n");
+ pm_runtime_get_sync(musb->controller);
for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
switch (musb_regmap[i].size) {
@@ -127,55 +106,53 @@ static int musb_regdump_show(struct seq_file *s, void *unused)
}
}
+ pm_runtime_put_autosuspend(musb->controller);
return 0;
}
-
-static int musb_regdump_open(struct inode *inode, struct file *file)
-{
- return single_open(file, musb_regdump_show, inode->i_private);
-}
+DEFINE_SHOW_ATTRIBUTE(musb_regdump);
static int musb_test_mode_show(struct seq_file *s, void *unused)
{
struct musb *musb = s->private;
unsigned test;
+ pm_runtime_get_sync(musb->controller);
test = musb_readb(musb->mregs, MUSB_TESTMODE);
+ pm_runtime_put_autosuspend(musb->controller);
- if (test & MUSB_TEST_FORCE_HOST)
+ if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS))
+ seq_printf(s, "force host full-speed\n");
+
+ else if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS))
+ seq_printf(s, "force host high-speed\n");
+
+ else if (test == MUSB_TEST_FORCE_HOST)
seq_printf(s, "force host\n");
- if (test & MUSB_TEST_FIFO_ACCESS)
+ else if (test == MUSB_TEST_FIFO_ACCESS)
seq_printf(s, "fifo access\n");
- if (test & MUSB_TEST_FORCE_FS)
+ else if (test == MUSB_TEST_FORCE_FS)
seq_printf(s, "force full-speed\n");
- if (test & MUSB_TEST_FORCE_HS)
+ else if (test == MUSB_TEST_FORCE_HS)
seq_printf(s, "force high-speed\n");
- if (test & MUSB_TEST_PACKET)
+ else if (test == MUSB_TEST_PACKET)
seq_printf(s, "test packet\n");
- if (test & MUSB_TEST_K)
+ else if (test == MUSB_TEST_K)
seq_printf(s, "test K\n");
- if (test & MUSB_TEST_J)
+ else if (test == MUSB_TEST_J)
seq_printf(s, "test J\n");
- if (test & MUSB_TEST_SE0_NAK)
+ else 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);
@@ -186,42 +163,58 @@ static ssize_t musb_test_mode_write(struct file *file,
{
struct seq_file *s = file->private_data;
struct musb *musb = s->private;
- u8 test = 0;
- char buf[18];
+ u8 test;
+ char buf[24];
memset(buf, 0x00, sizeof(buf));
- if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
- if (!strncmp(buf, "force host", 9))
+ pm_runtime_get_sync(musb->controller);
+ test = musb_readb(musb->mregs, MUSB_TESTMODE);
+ if (test) {
+ dev_err(musb->controller, "Error: test mode is already set. "
+ "Please do USB Bus Reset to start a new test.\n");
+ goto ret;
+ }
+
+ if (strstarts(buf, "force host full-speed"))
+ test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS;
+
+ else if (strstarts(buf, "force host high-speed"))
+ test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS;
+
+ else if (strstarts(buf, "force host"))
test = MUSB_TEST_FORCE_HOST;
- if (!strncmp(buf, "fifo access", 11))
+ else if (strstarts(buf, "fifo access"))
test = MUSB_TEST_FIFO_ACCESS;
- if (!strncmp(buf, "force full-speed", 15))
+ else if (strstarts(buf, "force full-speed"))
test = MUSB_TEST_FORCE_FS;
- if (!strncmp(buf, "force high-speed", 15))
+ else if (strstarts(buf, "force high-speed"))
test = MUSB_TEST_FORCE_HS;
- if (!strncmp(buf, "test packet", 10)) {
+ else if (strstarts(buf, "test packet")) {
test = MUSB_TEST_PACKET;
musb_load_testpacket(musb);
}
- if (!strncmp(buf, "test K", 6))
+ else if (strstarts(buf, "test K"))
test = MUSB_TEST_K;
- if (!strncmp(buf, "test J", 6))
+ else if (strstarts(buf, "test J"))
test = MUSB_TEST_J;
- if (!strncmp(buf, "test SE0 NAK", 12))
+ else if (strstarts(buf, "test SE0 NAK"))
test = MUSB_TEST_SE0_NAK;
musb_writeb(musb->mregs, MUSB_TESTMODE, test);
+ret:
+ pm_runtime_put_autosuspend(musb->controller);
return count;
}
@@ -233,41 +226,108 @@ static const struct file_operations musb_test_mode_fops = {
.release = single_release,
};
-int musb_init_debugfs(struct musb *musb)
+static int musb_softconnect_show(struct seq_file *s, void *unused)
{
- struct dentry *root;
- struct dentry *file;
- int ret;
-
- root = debugfs_create_dir(dev_name(musb->controller), NULL);
- if (!root) {
- ret = -ENOMEM;
- goto err0;
+ struct musb *musb = s->private;
+ u8 reg;
+ int connect;
+
+ switch (musb_get_state(musb)) {
+ case OTG_STATE_A_HOST:
+ case OTG_STATE_A_WAIT_BCON:
+ pm_runtime_get_sync(musb->controller);
+
+ reg = musb_readb(musb->mregs, MUSB_DEVCTL);
+ connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0;
+
+ pm_runtime_put_autosuspend(musb->controller);
+ break;
+ default:
+ connect = -1;
}
- file = debugfs_create_file("regdump", S_IRUGO, root, musb,
- &musb_regdump_fops);
- if (!file) {
- ret = -ENOMEM;
- goto err1;
- }
+ seq_printf(s, "%d\n", connect);
- file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
- root, musb, &musb_test_mode_fops);
- if (!file) {
- ret = -ENOMEM;
- goto err1;
+ return 0;
+}
+
+static int musb_softconnect_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, musb_softconnect_show, inode->i_private);
+}
+
+static ssize_t musb_softconnect_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;
+ char buf[2];
+ u8 reg;
+
+ memset(buf, 0x00, sizeof(buf));
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ pm_runtime_get_sync(musb->controller);
+ if (!strncmp(buf, "0", 1)) {
+ switch (musb_get_state(musb)) {
+ case OTG_STATE_A_HOST:
+ musb_root_disconnect(musb);
+ reg = musb_readb(musb->mregs, MUSB_DEVCTL);
+ reg &= ~MUSB_DEVCTL_SESSION;
+ musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
+ break;
+ default:
+ break;
+ }
+ } else if (!strncmp(buf, "1", 1)) {
+ switch (musb_get_state(musb)) {
+ case OTG_STATE_A_WAIT_BCON:
+ /*
+ * musb_save_context() called in musb_runtime_suspend()
+ * might cache devctl with SESSION bit cleared during
+ * soft-disconnect, so specifically set SESSION bit
+ * here to preserve it for musb_runtime_resume().
+ */
+ musb->context.devctl |= MUSB_DEVCTL_SESSION;
+ reg = musb_readb(musb->mregs, MUSB_DEVCTL);
+ reg |= MUSB_DEVCTL_SESSION;
+ musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
+ break;
+ default:
+ break;
+ }
}
- musb->debugfs_root = root;
+ pm_runtime_put_autosuspend(musb->controller);
+ return count;
+}
- return 0;
+/*
+ * In host mode, connect/disconnect the bus without physically
+ * remove the devices.
+ */
+static const struct file_operations musb_softconnect_fops = {
+ .open = musb_softconnect_open,
+ .write = musb_softconnect_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
-err1:
- debugfs_remove_recursive(root);
+void musb_init_debugfs(struct musb *musb)
+{
+ struct dentry *root;
+
+ root = debugfs_create_dir(dev_name(musb->controller), usb_debug_root);
+ musb->debugfs_root = root;
-err0:
- return ret;
+ debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops);
+ debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, musb,
+ &musb_test_mode_fops);
+ debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, root, musb,
+ &musb_softconnect_fops);
}
void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
generated by cgit (git 2.34.1) at 2025-12-25 06:21:37 +0000