Commit graph

9 commits

Author SHA1 Message Date
Sebastian Andrzej Siewior
9b3452d1fa usb: musb dma: add cppi41 dma driver
This driver is currently used by musb' cppi41 couter part. I may merge
both dma engine user of musb at some point but not just yet.

The driver seems to work in RX/TX mode in host mode, tested on mass
storage. I increaed the size of the TX / RX transfers and waited for the
core code to cancel a transfers and it seems to recover.

v2..3:
- use mall transfers on RX side and check data toggle.
- use rndis mode on tx side so we haveon interrupt for 4096 transfers.
- remove custom "transferred" hack and use dmaengine_tx_status() to
  compute the total amount of data that has been transferred.
- cancel transfers and reclaim descriptors

v1..v2:
- RX path added
- dma mode 0 & 1 is working
- device tree nodes re-created.

Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <djbw@fb.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-08-09 17:40:16 +03:00
Sebastian Andrzej Siewior
a6a20885f1 usb: musb: provide empty dma_controller_create() in PIO mode
Add a dma_controller_create() returning NULL so a few ifdefs can
dropped.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-07-29 13:53:19 +03:00
Sebastian Andrzej Siewior
66c01883ef usb: musb: dma: merge ->start/stop into create/destroy
The core code creates a controller and immediately after that it calls
the ->start() callback. This one might drop an error but nobody cares.
The same thing happens in the destroy corner: First ->stop() called
followed by destroy callback. So why not merge those two into the same
function since there is no difference.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-07-29 13:53:18 +03:00
Sebastian Andrzej Siewior
260eba39bc usb: musb: replace ifndef with ifdef for CONFIG_MUSB_PIO_ONLY
The ifdef reads somehow better than an ifndef

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-07-29 13:53:16 +03:00
Bill Pemberton
41ac7b3ab7 usb: remove use of __devinit
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Peter Korsgaard <jacmet@sunsite.dk>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Li Yang <leoli@freescale.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Olav Kongas <ok@artecdesign.ee>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-21 13:27:16 -08:00
Shubhrajyoti D
07a67bbb95 usb: musb: Make dma_controller_create __devinit
dma_controller_create is called only from musb_init_controller
which is __devint so annotate dma_controller_create also with
__devint.

fixes the warn

WARNING: vmlinux.o(.devinit.text+0x6fa8): Section mismatch in reference from the function musb_init_controller() to the function .init.text:dma_controller_create()
The function __devinit musb_init_controller() references
a function __init dma_controller_create().
If dma_controller_create is only used by musb_init_controller then
annotate dma_controller_create with a matching annotation.

Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2012-08-09 18:05:07 +03:00
Mian Yousaf Kaukab
5f5761cb8e usb: musb: introduce api for dma code to check compatibility with usb request
Gadget MUSB driver handles dma mappings in musb_gadget_queue(). Where as it is
possible for  dma code to reject the usb request later at ->channel_program()
called from txstate()/rxstate()

For example ->channel_program in tusb6010_omap.c:

static int tusb_omap_dma_program(struct dma_channel *channel, u16 packet_sz,
        u8 rndis_mode, dma_addr_t dma_addr, u32 len)
{
...
	if (unlikely(dma_addr & 0x1) || (len < 32) || (len > packet_sz))
		return false;
...
	if (dma_addr & 0x2)
		return false;
...
}

In this case, usb request will be handled in PIO mode which renders dma mapping
operations unnecessary.

This patch adds an api to allow dma code to indicate incompatibility with usb
request. Gadget musb driver call this api, if available, before dma mappings to
avoid any unnecessary mapping operations.

Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-02-01 10:41:30 +02:00
Sonic Zhang
9720faec51 USB: musb: add work around for Blackfin anomaly 05000456
Only allow USE_MODE1 when the Blackfin part is not affected by anomaly
05000456 (USB Receive Interrupt Is Not Generated in DMA Mode 1) since we
can't support the mode in that case.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11 11:55:24 -08:00
Felipe Balbi
550a7375fe USB: Add MUSB and TUSB support
This patch adds support for MUSB and TUSB controllers
integrated into omap2430 and davinci. It also adds support
for external tusb6010 controller.

Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-13 17:33:00 -07:00