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Subject[PATCH v2] usb: musb: debugfs: allow forcing host mode together with speed in testmode
Date
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 <pali.rohar@gmail.com>
---
Changes in v2:
* Use == instead of & for comparison of testmode
---
drivers/usb/musb/musb_debugfs.c | 44 +++++++++++++++++++++++++--------------
1 file changed, 28 insertions(+), 16 deletions(-)

diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index 9b22d94..5308cea 100644
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -147,28 +147,34 @@ static int musb_test_mode_show(struct seq_file *s, void *unused)

test = musb_readb(musb->mregs, MUSB_TESTMODE);

- 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;
@@ -206,30 +212,36 @@ 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);
--
1.7.9.5
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