diff options
| author | Niklas Neronin <niklas.neronin@linux.intel.com> | 2025-11-19 16:24:14 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-21 14:53:01 +0100 |
| commit | 9936909099cc13a50d7ed1a12370eb03d72ab492 (patch) | |
| tree | bc2d5f8f9f9f364a72f6c464fe2a2e1123472716 | |
| parent | f724e34719f03133e6c1ebf7386070f0b9a3209f (diff) | |
usb: xhci: simplify Max Scratchpad buffer macros
Max Scratchpad Buffers consist of two bit-fields:
bits 25:21 - Max Scratchpad Buffers High, 5 Most significant bits
bits 27:31 - Max Scratchpad Buffers Low, 5 Least significant bits
Combined they create the Max Scratchpad Buffers value.
Add two new macros, 'HCS_MAX_SP_HI' and 'HCS_MAX_SP_LO', to separately
extract the high and low parts of the Max Scratchpad Buffers. These are
then combined using 'HCS_MAX_SCRATCHPAD' macro. This change simplifies
the code and makes it similar to other split value register macros in the
xhci driver.
Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20251119142417.2820519-21-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/xhci-caps.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-caps.h b/drivers/usb/host/xhci-caps.h index e772d5f30d36..af47aebc5ba8 100644 --- a/drivers/usb/host/xhci-caps.h +++ b/drivers/usb/host/xhci-caps.h @@ -37,9 +37,11 @@ #define HCS_ERST_MAX(p) (((p) >> 4) & 0xf) /* bits 20:8 - Rsvd */ /* bits 25:21 - Max Scratchpad Buffers (Hi), 5 Most significant bits */ +#define HCS_MAX_SP_HI(p) (((p) >> 21) & 0x1f) /* bit 26 - Scratchpad restore, for save/restore HW state */ /* bits 31:27 - Max Scratchpad Buffers (Lo), 5 Least significant bits */ -#define HCS_MAX_SCRATCHPAD(p) ((((p) >> 16) & 0x3e0) | (((p) >> 27) & 0x1f)) +#define HCS_MAX_SP_LO(p) (((p) >> 27) & 0x1f) +#define HCS_MAX_SCRATCHPAD(p) (HCS_MAX_SP_HI(p) << 5 | HCS_MAX_SP_LO(p)) /* HCSPARAMS3 - hcs_params3 - bitmasks */ /* bits 7:0 - U1 Device Exit Latency, Max U1 to U0 latency for the roothub ports */ |