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/*
* 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", 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, 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 },
{ } /* 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)
{
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 (!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 /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
{
debugfs_remove_recursive(musb_debugfs_root);
}
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