diff options
author | Jussi Kivilinna <jussi.kivilinna@mbnet.fi> | 2011-05-30 10:15:47 +0300 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2011-05-31 14:47:26 -0400 |
commit | 59342f6a6bc35df623fb44784daa5e1077063b8f (patch) | |
tree | 612d3ec8c09d18fb0a97f841a535de8b25e46ada /drivers/net | |
parent | 66870b1ccd5c1460e437c18b0026e2dcaab1ece9 (diff) |
zd1211rw: fix to work on OHCI
zd1211 devices register 'EP 4 OUT' endpoint as Interrupt type on USB 2.0:
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
However on USB 1.1 endpoint becomes Bulk:
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Commit 37939810b937aba830dd751291fcdc51cae1a6cb assumed that endpoint is
always interrupt type and changed usb_bulk_msg() calls to usb_interrupt_msg().
Problem here is that usb_bulk_msg() on interrupt endpoint selfcorrects the
call and changes requested pipe to interrupt type (see usb_bulk_msg).
However with usb_interrupt_msg() on bulk endpoint does not correct the
pipe type to bulk, but instead URB is submitted with interrupt type pipe.
So pre-2.6.39 used usb_bulk_msg() and therefore worked with both endpoint
types, however in 2.6.39 usb_interrupt_msg() with bulk endpoint causes
ohci_hcd to fail submitted URB instantly with -ENOSPC and preventing zd1211rw
from working with OHCI.
Fix this by detecting endpoint type and using correct endpoint/pipe types
for URB. Also fix asynchronous zd_usb_iowrite16v_async() to use right
URB type on 'EP 4 OUT'.
Cc: stable@kernel.org
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/wireless/zd1211rw/zd_usb.c | 53 |
1 files changed, 42 insertions, 11 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c index 0e819943b9e..631194d4982 100644 --- a/drivers/net/wireless/zd1211rw/zd_usb.c +++ b/drivers/net/wireless/zd1211rw/zd_usb.c @@ -1533,6 +1533,31 @@ static void __exit usb_exit(void) module_init(usb_init); module_exit(usb_exit); +static int zd_ep_regs_out_msg(struct usb_device *udev, void *data, int len, + int *actual_length, int timeout) +{ + /* In USB 2.0 mode EP_REGS_OUT endpoint is interrupt type. However in + * USB 1.1 mode endpoint is bulk. Select correct type URB by endpoint + * descriptor. + */ + struct usb_host_endpoint *ep; + unsigned int pipe; + + pipe = usb_sndintpipe(udev, EP_REGS_OUT); + ep = usb_pipe_endpoint(udev, pipe); + if (!ep) + return -EINVAL; + + if (usb_endpoint_xfer_int(&ep->desc)) { + return usb_interrupt_msg(udev, pipe, data, len, + actual_length, timeout); + } else { + pipe = usb_sndbulkpipe(udev, EP_REGS_OUT); + return usb_bulk_msg(udev, pipe, data, len, actual_length, + timeout); + } +} + static int usb_int_regs_length(unsigned int count) { return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); @@ -1648,15 +1673,14 @@ int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, udev = zd_usb_to_usbdev(usb); prepare_read_regs_int(usb); - r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT), - req, req_len, &actual_req_len, 50 /* ms */); + r = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/); if (r) { dev_dbg_f(zd_usb_dev(usb), - "error in usb_interrupt_msg(). Error number %d\n", r); + "error in zd_ep_regs_out_msg(). Error number %d\n", r); goto error; } if (req_len != actual_req_len) { - dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()\n" + dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_msg()\n" " req_len %d != actual_req_len %d\n", req_len, actual_req_len); r = -EIO; @@ -1818,9 +1842,17 @@ int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, rw->value = cpu_to_le16(ioreqs[i].value); } - usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT), - req, req_len, iowrite16v_urb_complete, usb, - ep->desc.bInterval); + /* In USB 2.0 mode endpoint is interrupt type. However in USB 1.1 mode + * endpoint is bulk. Select correct type URB by endpoint descriptor. + */ + if (usb_endpoint_xfer_int(&ep->desc)) + usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT), + req, req_len, iowrite16v_urb_complete, usb, + ep->desc.bInterval); + else + usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_REGS_OUT), + req, req_len, iowrite16v_urb_complete, usb); + urb->transfer_flags |= URB_FREE_BUFFER; /* Submit previous URB */ @@ -1924,15 +1956,14 @@ int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) } udev = zd_usb_to_usbdev(usb); - r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT), - req, req_len, &actual_req_len, 50 /* ms */); + r = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/); if (r) { dev_dbg_f(zd_usb_dev(usb), - "error in usb_interrupt_msg(). Error number %d\n", r); + "error in zd_ep_regs_out_msg(). Error number %d\n", r); goto out; } if (req_len != actual_req_len) { - dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()" + dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_msg()" " req_len %d != actual_req_len %d\n", req_len, actual_req_len); r = -EIO; |