usb-designware: New USB driver for Synopsys DesignWare USB OTG core.

Patch Set 1:

This bundle includes:
- USBOTG_DESIGNWARE driver based on g#844 and g#949
- USBOTG_DESIGNWARE for s5l8702 (Classic)
- USBOTG_DESIGNWARE for s5l8701 (Nano2G)
- USBOTG_DESIGNWARE for as3525v2 (enabled on Sansa Zip Clip)
- ALIGNED_BUFFER_QUICK_PATCH (usb_serial.c)

Preliminary version, needs to adjust some things and rework to
optimize in size.

Tested on Linux (USB_STORAGE, USB_HID and USB_SERIAL).

Known issues:
- n2g: panics when USB is extracted and then re-inserted quickly. This
  only happens when "Error accessing playlist control file" is shown
  (RB bug?).

Patch Set 2:

- Enable USBOTG_DESIGNWARE for sansaclipplus, sansaclipv2 and sansafuzev2,
  these targets have never been tested.

- First round of optimizations, mainly tries to homogenize the names of
  the endpoints and other small changes, functionality should be the same
  as in the previous patch set.

Patch Set 3:

- Some rewrite/optimizations, functionality should be the same as in the
  previous patch set.

Patch Set 4:

- n2g: enable EPROTO workaround, EPROTO errors are produced while the
  device is receiving bulk data, they are highly mitigated running the
  PHY @60 MHz. but it seems that occasionally the problem still persists.
  This workaround tries to solve the issue by flushing the Rx FIFO/queue
  that were corrupted by the received data.

- Some minor miscellaneous changes, previous functionality should not be
  affected.

Patch Set 5:

- Changes in commit message.

Patch Set 6:

- Small rewrite/optimizacions including some minor changes, previous
  functionallity should not be affected.

- Add usb_drv_recv_blocking(), not tested.

Patch Set 7:

- Fix panics when USB is extracted and then re-inserted quickly
  ("usb_storage_init_connection(): OOM" panic on Nano2G and Classic).

Change-Id: Iecf21dacc458ba2bdfc93782d3e08b3acdf0720d

2 files changed, 11 insertions, 0 deletions

diff --git a/firmware/usbstack/usb_serial.c b/firmware/usbstack/usb_serial.c
index 4a80433..7c425dc 100644
--- a/firmware/usbstack/usb_serial.c
+++ b/firmware/usbstack/usb_serial.c
@@ -60,6 +60,11 @@ static unsigned char send_buffer[BUFFER_SIZE]
     USB_DEVBSS_ATTR __attribute__((aligned(32)));
 static unsigned char receive_buffer[32]
     USB_DEVBSS_ATTR __attribute__((aligned(32)));
+#if CONFIG_USBOTG == USBOTG_DESIGNWARE
+/* Aligned transit buffer */
+static unsigned char transit_buffer[32]
+    USB_DEVBSS_ATTR __attribute__((aligned(4)));
+#endif
 
 static void sendout(void);
 
@@ -163,8 +168,13 @@ static void sendout(void)
     if(buffer_transitlength > 0)
     {
         buffer_length -= buffer_transitlength;
+#if CONFIG_USBOTG == USBOTG_DESIGNWARE
+        memcpy(transit_buffer,&send_buffer[buffer_start],buffer_transitlength);
+        usb_drv_send_nonblocking(ep_in,transit_buffer,buffer_transitlength);
+#else
         usb_drv_send_nonblocking(ep_in, &send_buffer[buffer_start],
                 buffer_transitlength);
+#endif
     }
 }
 
diff --git a/firmware/usbstack/usb_storage.c b/firmware/usbstack/usb_storage.c
index 59ec191..efc243f 100644
--- a/firmware/usbstack/usb_storage.c
+++ b/firmware/usbstack/usb_storage.c
@@ -438,6 +438,7 @@ void usb_storage_init_connection(void)
     state = WAITING_FOR_COMMAND;
 
 #if (CONFIG_CPU == IMX31L || defined(CPU_TCC77X) || defined(CPU_TCC780X) || \
+     CONFIG_CPU == S5L8702 || CONFIG_CPU == S5L8701 || \
      defined(BOOTLOADER) || CONFIG_CPU == DM320) && !defined(CPU_PP502x)
     static unsigned char _cbw_buffer[MAX_CBW_SIZE]
         USB_DEVBSS_ATTR __attribute__((aligned(32)));