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4b52c39dc6
This patch moves Flow Handlers define to a new file iwl-fh.h Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
392 lines
17 KiB
C
392 lines
17 KiB
C
/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* James P. Ketrenos <ipw2100-admin@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*****************************************************************************/
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/****************************/
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/* Flow Handler Definitions */
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/****************************/
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/**
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* This I/O area is directly read/writable by driver (e.g. Linux uses writel())
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* Addresses are offsets from device's PCI hardware base address.
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*/
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#define FH_MEM_LOWER_BOUND (0x1000)
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#define FH_MEM_UPPER_BOUND (0x1EF0)
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/**
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* Keep-Warm (KW) buffer base address.
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*
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* Driver must allocate a 4KByte buffer that is used by 4965 for keeping the
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* host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency
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* DRAM access when 4965 is Txing or Rxing. The dummy accesses prevent host
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* from going into a power-savings mode that would cause higher DRAM latency,
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* and possible data over/under-runs, before all Tx/Rx is complete.
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*
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* Driver loads FH_KW_MEM_ADDR_REG with the physical address (bits 35:4)
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* of the buffer, which must be 4K aligned. Once this is set up, the 4965
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* automatically invokes keep-warm accesses when normal accesses might not
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* be sufficient to maintain fast DRAM response.
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*
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* Bit fields:
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* 31-0: Keep-warm buffer physical base address [35:4], must be 4K aligned
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*/
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#define FH_KW_MEM_ADDR_REG (FH_MEM_LOWER_BOUND + 0x97C)
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/**
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* TFD Circular Buffers Base (CBBC) addresses
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*
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* 4965 has 16 base pointer registers, one for each of 16 host-DRAM-resident
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* circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
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* (see struct iwl_tfd_frame). These 16 pointer registers are offset by 0x04
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* bytes from one another. Each TFD circular buffer in DRAM must be 256-byte
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* aligned (address bits 0-7 must be 0).
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*
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* Bit fields in each pointer register:
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* 27-0: TFD CB physical base address [35:8], must be 256-byte aligned
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*/
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#define FH_MEM_CBBC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0)
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#define FH_MEM_CBBC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xA10)
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/* Find TFD CB base pointer for given queue (range 0-15). */
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#define FH_MEM_CBBC_QUEUE(x) (FH_MEM_CBBC_LOWER_BOUND + (x) * 0x4)
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/**
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* Rx SRAM Control and Status Registers (RSCSR)
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*
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* These registers provide handshake between driver and 4965 for the Rx queue
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* (this queue handles *all* command responses, notifications, Rx data, etc.
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* sent from 4965 uCode to host driver). Unlike Tx, there is only one Rx
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* queue, and only one Rx DMA/FIFO channel. Also unlike Tx, which can
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* concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer
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* Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1
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* mapping between RBDs and RBs.
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*
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* Driver must allocate host DRAM memory for the following, and set the
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* physical address of each into 4965 registers:
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*
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* 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
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* entries (although any power of 2, up to 4096, is selectable by driver).
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* Each entry (1 dword) points to a receive buffer (RB) of consistent size
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* (typically 4K, although 8K or 16K are also selectable by driver).
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* Driver sets up RB size and number of RBDs in the CB via Rx config
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* register FH_MEM_RCSR_CHNL0_CONFIG_REG.
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*
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* Bit fields within one RBD:
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* 27-0: Receive Buffer physical address bits [35:8], 256-byte aligned
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*
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* Driver sets physical address [35:8] of base of RBD circular buffer
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* into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0].
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*
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* 2) Rx status buffer, 8 bytes, in which 4965 indicates which Rx Buffers
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* (RBs) have been filled, via a "write pointer", actually the index of
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* the RB's corresponding RBD within the circular buffer. Driver sets
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* physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0].
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*
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* Bit fields in lower dword of Rx status buffer (upper dword not used
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* by driver; see struct iwl4965_shared, val0):
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* 31-12: Not used by driver
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* 11- 0: Index of last filled Rx buffer descriptor
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* (4965 writes, driver reads this value)
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*
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* As the driver prepares Receive Buffers (RBs) for 4965 to fill, driver must
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* enter pointers to these RBs into contiguous RBD circular buffer entries,
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* and update the 4965's "write" index register,
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* FH_RSCSR_CHNL0_RBDCB_WPTR_REG.
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*
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* This "write" index corresponds to the *next* RBD that the driver will make
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* available, i.e. one RBD past the tail of the ready-to-fill RBDs within
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* the circular buffer. This value should initially be 0 (before preparing any
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* RBs), should be 8 after preparing the first 8 RBs (for example), and must
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* wrap back to 0 at the end of the circular buffer (but don't wrap before
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* "read" index has advanced past 1! See below).
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* NOTE: 4965 EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8.
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*
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* As the 4965 fills RBs (referenced from contiguous RBDs within the circular
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* buffer), it updates the Rx status buffer in host DRAM, 2) described above,
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* to tell the driver the index of the latest filled RBD. The driver must
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* read this "read" index from DRAM after receiving an Rx interrupt from 4965.
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*
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* The driver must also internally keep track of a third index, which is the
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* next RBD to process. When receiving an Rx interrupt, driver should process
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* all filled but unprocessed RBs up to, but not including, the RB
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* corresponding to the "read" index. For example, if "read" index becomes "1",
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* driver may process the RB pointed to by RBD 0. Depending on volume of
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* traffic, there may be many RBs to process.
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*
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* If read index == write index, 4965 thinks there is no room to put new data.
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* Due to this, the maximum number of filled RBs is 255, instead of 256. To
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* be safe, make sure that there is a gap of at least 2 RBDs between "write"
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* and "read" indexes; that is, make sure that there are no more than 254
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* buffers waiting to be filled.
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*/
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#define FH_MEM_RSCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBC0)
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#define FH_MEM_RSCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
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#define FH_MEM_RSCSR_CHNL0 (FH_MEM_RSCSR_LOWER_BOUND)
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/**
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* Physical base address of 8-byte Rx Status buffer.
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* Bit fields:
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* 31-0: Rx status buffer physical base address [35:4], must 16-byte aligned.
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*/
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#define FH_RSCSR_CHNL0_STTS_WPTR_REG (FH_MEM_RSCSR_CHNL0)
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/**
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* Physical base address of Rx Buffer Descriptor Circular Buffer.
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* Bit fields:
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* 27-0: RBD CD physical base address [35:8], must be 256-byte aligned.
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*/
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#define FH_RSCSR_CHNL0_RBDCB_BASE_REG (FH_MEM_RSCSR_CHNL0 + 0x004)
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/**
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* Rx write pointer (index, really!).
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* Bit fields:
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* 11-0: Index of driver's most recent prepared-to-be-filled RBD, + 1.
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* NOTE: For 256-entry circular buffer, use only bits [7:0].
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*/
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#define FH_RSCSR_CHNL0_RBDCB_WPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x008)
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#define FH_RSCSR_CHNL0_WPTR (FH_RSCSR_CHNL0_RBDCB_WPTR_REG)
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/**
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* Rx Config/Status Registers (RCSR)
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* Rx Config Reg for channel 0 (only channel used)
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*
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* Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for
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* normal operation (see bit fields).
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*
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* Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA.
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* Driver should poll FH_MEM_RSSR_RX_STATUS_REG for
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* FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing.
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*
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* Bit fields:
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* 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame,
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* '10' operate normally
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* 29-24: reserved
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* 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal),
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* min "5" for 32 RBDs, max "12" for 4096 RBDs.
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* 19-18: reserved
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* 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K,
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* '10' 12K, '11' 16K.
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* 15-14: reserved
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* 13-12: IRQ destination; '00' none, '01' host driver (normal operation)
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* 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec)
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* typical value 0x10 (about 1/2 msec)
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* 3- 0: reserved
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*/
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#define FH_MEM_RCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
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#define FH_MEM_RCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xCC0)
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#define FH_MEM_RCSR_CHNL0 (FH_MEM_RCSR_LOWER_BOUND)
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#define FH_MEM_RCSR_CHNL0_CONFIG_REG (FH_MEM_RCSR_CHNL0)
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#define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0) /* bits 4-11 */
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#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK (0x00001000) /* bits 12 */
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#define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000) /* bit 15 */
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#define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK (0x00030000) /* bits 16-17 */
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#define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000) /* bits 20-23 */
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#define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000) /* bits 30-31*/
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#define FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT (20)
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#define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_BITSHIFT (4)
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#define RX_RB_TIMEOUT (0x10)
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#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL (0x00000000)
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#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL (0x40000000)
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#define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL (0x80000000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K (0x00000000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K (0x00010000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K (0x00020000)
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#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K (0x00030000)
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#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL (0x00000000)
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#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL (0x00001000)
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/**
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* Rx Shared Status Registers (RSSR)
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*
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* After stopping Rx DMA channel (writing 0 to
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* FH_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll
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* FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle.
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*
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* Bit fields:
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* 24: 1 = Channel 0 is idle
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*
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* FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV
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* contain default values that should not be altered by the driver.
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*/
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#define FH_MEM_RSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC40)
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#define FH_MEM_RSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
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#define FH_MEM_RSSR_SHARED_CTRL_REG (FH_MEM_RSSR_LOWER_BOUND)
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#define FH_MEM_RSSR_RX_STATUS_REG (FH_MEM_RSSR_LOWER_BOUND + 0x004)
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#define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\
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(FH_MEM_RSSR_LOWER_BOUND + 0x008)
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#define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (0x01000000)
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/**
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* Transmit DMA Channel Control/Status Registers (TCSR)
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*
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* 4965 has one configuration register for each of 8 Tx DMA/FIFO channels
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* supported in hardware (don't confuse these with the 16 Tx queues in DRAM,
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* which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes.
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*
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* To use a Tx DMA channel, driver must initialize its
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* FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with:
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*
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* FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
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* FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
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*
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* All other bits should be 0.
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*
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* Bit fields:
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* 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame,
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* '10' operate normally
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* 29- 4: Reserved, set to "0"
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* 3: Enable internal DMA requests (1, normal operation), disable (0)
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* 2- 0: Reserved, set to "0"
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*/
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#define FH_TCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
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#define FH_TCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xE60)
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/* Find Control/Status reg for given Tx DMA/FIFO channel */
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#define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \
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(FH_TCSR_LOWER_BOUND + 0x20 * _chnl)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE_VAL (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL (0x00000008)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF (0x40000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE (0x80000000)
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#define FH_TCSR_CHNL_NUM (7)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY (0x00000000)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT (0x00002000)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID (0x00000003)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT (0x00000000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD (0x00100000)
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#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD (0x00200000)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM (20)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX (12)
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#define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \
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(FH_TCSR_LOWER_BOUND + 0x20 * _chnl)
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#define FH_TCSR_CHNL_TX_CREDIT_REG(_chnl) \
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(FH_TCSR_LOWER_BOUND + 0x20 * _chnl + 0x4)
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#define FH_TCSR_CHNL_TX_BUF_STS_REG(_chnl) \
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(FH_TCSR_LOWER_BOUND + 0x20 * _chnl + 0x8)
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/**
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* Tx Shared Status Registers (TSSR)
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*
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* After stopping Tx DMA channel (writing 0 to
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* FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll
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* FH_TSSR_TX_STATUS_REG until selected Tx channel is idle
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* (channel's buffers empty | no pending requests).
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*
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* Bit fields:
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* 31-24: 1 = Channel buffers empty (channel 7:0)
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* 23-16: 1 = No pending requests (channel 7:0)
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*/
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#define FH_TSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xEA0)
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#define FH_TSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xEC0)
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#define FH_TSSR_TX_STATUS_REG (FH_TSSR_LOWER_BOUND + 0x010)
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#define FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) ((1 << (_chnl)) << 24)
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#define FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl) ((1 << (_chnl)) << 16)
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#define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) \
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(FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) | \
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FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl))
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#define FH_REGS_LOWER_BOUND (0x1000)
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#define FH_REGS_UPPER_BOUND (0x2000)
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/* Tx service channels */
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#define FH_SRVC_CHNL (9)
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#define FH_SRVC_LOWER_BOUND (FH_REGS_LOWER_BOUND + 0x9C8)
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#define FH_SRVC_UPPER_BOUND (FH_REGS_LOWER_BOUND + 0x9D0)
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#define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \
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(FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4)
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/* TFDB Area - TFDs buffer table */
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#define FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK (0xFFFFFFFF)
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#define FH_TFDIB_LOWER_BOUND (FH_REGS_LOWER_BOUND + 0x900)
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#define FH_TFDIB_UPPER_BOUND (FH_REGS_LOWER_BOUND + 0x958)
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#define FH_TFDIB_CTRL0_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl))
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#define FH_TFDIB_CTRL1_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4)
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/* TCSR: tx_config register values */
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#define FH_RSCSR_FRAME_SIZE_MSK (0x00003FFF) /* bits 0-13 */
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