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A handful of registers are valid only for RX endpoints, and some
others are valid only for TX endpoints. For these endpoints, add
a comment above their defined offset macro that indicates the
endpoints to which they apply.
Extend the endpoint parameter naming convention as well, to make
these constraints more explicit.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The timer used for aggregation makes use of an internal 32 KHz clock.
The granularity of the timer is programmed by a field whose value is
computed by ipa_aggr_granularity_val(). Redefine the way that value
is computed by using a new TIMER_FREQUENCY constant representing the
underlying clock frequency.
Add two BUILD_BUG_ON() calls to ensure the value used is valid.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The upper two nibbles of the sequencer type were not used for
SDM845, and were assumed to be 0. But for SC7180 they are used, and
so they must be programmed by ipa_endpoint_init_seq(). Fix this bug.
IPA_SEQ_PKT_PROCESS_NO_DEC_NO_UCP_DMAP doesn't have a descriptive
comment, so add one.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch includes three source files that represent some basic "main
program" code for the IPA driver. They are:
- "ipa.h" defines the top-level IPA structure which represents an IPA
device throughout the code.
- "ipa_main.c" contains the platform driver probe function, along with
some general code used during initialization.
- "ipa_reg.h" defines the offsets of the 32-bit registers used for the
IPA device, along with masks that define the position and width of
fields within these registers.
- "version.h" defines some symbolic IPA version numbers.
Each file includes some documentation that provides a little more
overview of how the code is organized and used.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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