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usb: musb: debugfs: allow forcing host mode together with speed in te…
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…stmode

Based on the musb ug, force_host bit is allowed to be set along with
force_hs or force_fs bit.

It could help to implement forced host mode via testmode on Nokia N900.

Signed-off-by: Pali Rohár <[email protected]>
Signed-off-by: Bin Liu <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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@pali @gregkh
pali authored and gregkh committed Feb 3, 2017
1 parent bb1d1ce commit 7eebe4e
Showing 1 changed file with 29 additions and 17 deletions.
46 changes: 29 additions & 17 deletions drivers/usb/musb/musb_debugfs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -153,28 +153,34 @@ static int musb_test_mode_show(struct seq_file *s, void *unused)
pm_runtime_mark_last_busy(musb->controller);
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;
Expand All @@ -198,7 +204,7 @@ static ssize_t musb_test_mode_write(struct file *file,
struct seq_file *s = file->private_data;
struct musb *musb = s->private;
u8 test;
char buf[18];
char buf[24];

pm_runtime_get_sync(musb->controller);
test = musb_readb(musb->mregs, MUSB_TESTMODE);
Expand All @@ -213,30 +219,36 @@ static ssize_t musb_test_mode_write(struct file *file,
if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;

if (strstarts(buf, "force host"))
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 (strstarts(buf, "fifo access"))
else if (strstarts(buf, "fifo access"))
test = MUSB_TEST_FIFO_ACCESS;

if (strstarts(buf, "force full-speed"))
else if (strstarts(buf, "force full-speed"))
test = MUSB_TEST_FORCE_FS;

if (strstarts(buf, "force high-speed"))
else if (strstarts(buf, "force high-speed"))
test = MUSB_TEST_FORCE_HS;

if (strstarts(buf, "test packet")) {
else if (strstarts(buf, "test packet")) {
test = MUSB_TEST_PACKET;
musb_load_testpacket(musb);
}

if (strstarts(buf, "test K"))
else if (strstarts(buf, "test K"))
test = MUSB_TEST_K;

if (strstarts(buf, "test J"))
else if (strstarts(buf, "test J"))
test = MUSB_TEST_J;

if (strstarts(buf, "test SE0 NAK"))
else if (strstarts(buf, "test SE0 NAK"))
test = MUSB_TEST_SE0_NAK;

musb_writeb(musb->mregs, MUSB_TESTMODE, test);
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