linux-toradex.git/drivers/usb/renesas_usbhs/pipe.c, branch v4.4.61

usb: renesas_usbhs: add support for USB-DMAC

2015-03-13T15:41:19+00:00

Some Renesas SoCs have the USB-DMAC. It is able to terminate transfers
when a short packet is received, even if less bytes than the transfer
counter size have been received. Also, it is able to send a short
packet even if the packet size is not multiples of 8bytes.

Since the previous code has used the interruption of USBHS controller
when receiving packets even if this driver has used a dmac, a lot of
interruptions has happened. This patch will reduce such interruptions.

This patch allows to use the USB-DMAC on R-Car H2 and M2.

Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Felipe Balbi

usb: renesas_usbhs: fix usbhs_pipe_clear() for DCP PIPE

2014-11-05T19:22:16+00:00

Since the DCPCTR doesn't have the ACLRM bit, the usbus_pipe_clear()
should not call the usbhsp_pipectrl_set() with ACLRM.
So, this patch fixes this issue to add the usbhs_fifo_clear_dcp()
in fifo.c because the controller needs the CFIFO to clear the
the DCP PIPE.

Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Felipe Balbi

usb: renesas_usbhs: fix the behavior of some usbhs_pkt_handle

2014-09-03T14:15:57+00:00

Some gadget drivers will call usb_ep_queue() more than once before
the first queue doesn't finish. However, this driver didn't handle
it correctly. So, this patch fixes the behavior of some
usbhs_pkt_handle using the "running" flag. Otherwise, the oops below
happens if we use g_ncm driver and when the "iperf -u -c host -b 200M"
is running.

Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 80000007 [#1] SMP ARM
Modules linked in: usb_f_ncm g_ncm libcomposite u_ether
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W      3.17.0-rc1-00008-g8b2be8a-dirty #20
task: c051c7e0 ti: c0512000 task.ti: c0512000
PC is at 0x0
LR is at usbhsf_pkt_handler+0xa8/0x114
pc : [<00000000>]    lr : []    psr: 60000193
sp : c0513ce8  ip : c0513c58  fp : c0513d24
r10: 00000001  r9 : 00000193  r8 : eebec4a0
r7 : eebec410  r6 : eebe0c6c  r5 : 00000000  r4 : ee4a2774
r3 : 00000000  r2 : ee251e00  r1 : c0513cf4  r0 : ee4a2774

Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Felipe Balbi

usb: renesas_usbhs: gadget: fix re-enabling pipe without re-connecting

2014-07-10T13:36:49+00:00

This patch fixes an issue that the renesas_usbhs driver in gadget mode
cannot work correctly even if I disabled DMAC of the driver when I used
the g_zero driver and the testusb tool.

When a usb cable is re-connected, the renesas_usbhs driver calls the
usbhsp_flags_init() (via usbhs_hotplug() --> usbhs_mod_call(start) -->
usbhsg_try_start() --> usbhs_pipe_init()). However, the driver doesn't
call the usbhsp_flags_init() when usbhsg_ep_disable() is called.
So, if a gadget driver calls usb_ep_enable() and usb_ep_disable() again
and again, the renesas_usbhs driver will output the following log:

  renesas_usbhs renesas_usbhs: can't get pipe (BULK)
  renesas_usbhs renesas_usbhs: wrong recip request

Acked-by: Kuninori Morimoto 
Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Felipe Balbi

usb: renesas_usbhs: fix usbhs_pipe_malloc() to re-enable a pipe.

2014-07-10T13:36:49+00:00

This patch fixes an issue that the driver cannot push a new data when
a pipe is re-enabled after the pipe is queued.

Acked-by: Kuninori Morimoto 
Signed-off-by: Yoshihiro Shimoda 
Signed-off-by: Felipe Balbi

usb: renesas_usbhs: use transfer counter if IN direction bulk pipe

2012-11-08T13:46:06+00:00

received data will break if it was bulk pipe and large data size,
because pipe kept BUF PID even though it doesn't have enough buffer.
To avoid this issue, renesas_usbhs can use transfer counter.
Pipe PID will be NAK if it didn't have enough buffer by this patch.

renesas_usbhs has strange address mapping.
Thus, it is difficult to calculate transfer counter setting address.
This patch use fixed table for it.

Signed-off-by: Kuninori Morimoto 
Signed-off-by: Felipe Balbi

renesas_usbhs: cleanup quoted includes

2012-06-05T08:15:25+00:00

A few quoted includes start with a superfluous "./". Clean up those
quoted includes.

Signed-off-by: Paul Bolle 
Signed-off-by: Jiri Kosina

usb: renesas: pipe: convert a long if into a XOR operation

2011-12-21T11:24:43+00:00

This is just a minor optimization for the long
if we have on the driver.

When we want to check that one input is true
and the other must be false, the bitwise XOR
operator will achieve that for us.

Tested-by: Kuninori Morimoto 
Signed-off-by: Felipe Balbi

usb: renesas_usbhs: care pipe sequence

2011-12-13T11:06:26+00:00

driver has to re-use the limited pipe for each device/endpoint
when it is USB host hub mode, since number of pipe has limitation.

Then, each pipe should care own pipe sequence for next packet.
This patch adds sequence control.

Signed-off-by: Kuninori Morimoto 
Signed-off-by: Felipe Balbi

usb: renesas_usbhs: add usbhs_pipe_is_stall()

2011-12-12T09:45:15+00:00

This is preparation for chapter 9 test

Signed-off-by: Kuninori Morimoto 
Signed-off-by: Felipe Balbi