/* * Definitions for the KLSI KL5KUSB105 serial port adapter */ /* vendor/product pairs that are known to contain this chipset */ #define PALMCONNECT_VID 0x0830 #define PALMCONNECT_PID 0x0080 #define KLSI_VID 0x05e9 #define KLSI_KL5KUSB105D_PID 0x00c0 /* Vendor commands: */ /* port table -- the chip supports up to 4 channels */ /* baud rates */ enum { kl5kusb105a_sio_b115200 = 0, kl5kusb105a_sio_b57600 = 1, kl5kusb105a_sio_b38400 = 2, kl5kusb105a_sio_b19200 = 4, kl5kusb105a_sio_b14400 = 5, kl5kusb105a_sio_b9600 = 6, kl5kusb105a_sio_b4800 = 8, /* unchecked */ kl5kusb105a_sio_b2400 = 9, /* unchecked */ kl5kusb105a_sio_b1200 = 0xa, /* unchecked */ kl5kusb105a_sio_b600 = 0xb /* unchecked */ }; /* data bits */ #define kl5kusb105a_dtb_7 7 #define kl5kusb105a_dtb_8 8 /* requests: */ #define KL5KUSB105A_SIO_SET_DATA 1 #define KL5KUSB105A_SIO_POLL 2 #define KL5KUSB105A_SIO_CONFIGURE 3 /* values used for request KL5KUSB105A_SIO_CONFIGURE */ #define KL5KUSB105A_SIO_CONFIGURE_READ_ON 3 #define KL5KUSB105A_SIO_CONFIGURE_READ_OFF 2 /* Interpretation of modem status lines */ /* These need sorting out by individually connecting pins and checking * results. FIXME! * When data is being sent we see 0x30 in the lower byte; this must * contain DSR and CTS ... */ #define KL5KUSB105A_DSR ((1<<4) | (1<<5)) #define KL5KUSB105A_CTS ((1<<5) | (1<<4)) #define KL5KUSB105A_WANTS_TO_SEND 0x30 #if 0 #define KL5KUSB105A_DTR /* Data Terminal Ready */ #define KL5KUSB105A_CTS /* Clear To Send */ #define KL5KUSB105A_CD /* Carrier Detect */ #define KL5KUSB105A_DSR /* Data Set Ready */ #define KL5KUSB105A_RxD /* Receive pin */ #define KL5KUSB105A_LE #define KL5KUSB105A_RTS #define KL5KUSB105A_ST #define KL5KUSB105A_SR #define KL5KUSB105A_RI /* Ring Indicator */ #endif /linux/net-next.git/tree/include/uapi/mtd?h=nds-private-remove&id=ae4a3e028bb8b59e7cfeb0cc9ef03d885182ce8b'>treecommitdiff
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authorTony Lindgren <tony@atomide.com>2017-01-19 08:49:07 -0800
committerVinod Koul <vinod.koul@intel.com>2017-01-25 11:29:11 +0530
commitae4a3e028bb8b59e7cfeb0cc9ef03d885182ce8b (patch)
tree139fc7e29f97d6bb6c4dca2a97be2dc3f824bd51 /include/uapi/mtd
parent49def1853334396f948dcb4cedb9347abb318df5 (diff)
dmaengine: cppi41: Fix runtime PM timeouts with USB mass storage
Commit fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support") added runtime PM support for cppi41, but had corner case issues. Some of the issues were fixed with commit 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected"). That fix however caused a new regression where we can get error -115 messages with USB on BeagleBone when connecting a USB mass storage device to a hub. This is because when connecting a USB mass storage device to a hub, the initial DMA transfers can take over 200ms to complete and cppi41 autosuspend delay times out. To fix the issue, we want to implement refcounting for chan_busy array that contains the active dma transfers. Increasing the autosuspend delay won't help as that the delay could be potentially seconds, and it's best to let the USB subsystem to deal with the timeouts on errors. The earlier attempt for runtime PM was buggy as the pm_runtime_get/put() calls could get unpaired easily as they did not follow the state of the chan_busy array as described in commit 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected". Let's fix the issue by adding pm_runtime_get() to where a new transfer is added to the chan_busy array, and calls to pm_runtime_put() where chan_busy array entry is cleared. This prevents any autosuspend timeouts from happening while dma transfers are active. Fixes: 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected") Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support") Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Bin Liu <b-liu@ti.com> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Patrick Titiano <ptitiano@baylibre.com> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Tested-by: Bin Liu <b-liu@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'include/uapi/mtd')