From mboxrd@z Thu Jan 1 00:00:00 1970 From: Magnus Damm Date: Wed, 23 Jan 2008 06:58:26 +0000 Subject: [PATCH][0/2] usb: sm501 ohci controller patches V4/V2 Message-Id: <20080123065826.488.14168.sendpatchset@clockwork.opensource.se> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org usb: sm501 ohci controller patches V4/V2 [1/2] usb: dma bounce buffer support V4 [2/2] usb: ohci-sm501 driver V2 The sm501 usb host controller is a regular ohci implementation but with the exception that it can only do dma to a certain area of memory. This memory is sm501 specific and the mfd driver for sm501 currently divides this memory between the framebuffer and the usb host controller. To support the sm501 usb host controller we need to allocate all usb data from this sm501 memory. The function dma_declare_coherent_memory() helps us with that - all dma_alloc_coherent() calls will end up allocating such memory. The USB core does however allocate data using kmalloc, so to fully support such a behaviour we need dma bounce buffer support. These bounce buffers can be requested using the flag HCD_LOCAL_MEM. Signed-off-by: Magnus Damm --- drivers/usb/core/buffer.c | 9 - drivers/usb/core/hcd.c | 176 ++++++++++++++++++++++++--- drivers/usb/core/hcd.h | 1 drivers/usb/host/ohci-hcd.c | 5 drivers/usb/host/ohci-sm501.c | 264 +++++++++++++++++++++++++++++++++++++++++ 5 files changed, 432 insertions(+), 23 deletions(-)