Lines Matching +full:processing +full:- +full:engine
1 .. SPDX-License-Identifier: GPL-2.0
10 - A natively half-duplex Quad I/O capable SPI master
11 - Low latency I2C interface to support HIDI2C compliant devices
12 - A HW sequencer with RW DMA capability to system memory
29 -------------------------------
31 Below diagram illustrates the high-level architecture of THC software/hardware stack, which is fully
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37 | +-----------------------------------+ |
39 | +-----------------------------------+ |
40 | +-----------------------------------+ |
41 | | HID Multi-touch Driver | |
42 | +-----------------------------------+ |
43 | +-----------------------------------+ |
45 | +-----------------------------------+ |
46 | +-----------------------------------+ |
48 | +-----------------------------------+ |
49 | +-----------------------------------+ |
51 | +-----------------------------------+ |
52 | +----------------+ +----------------+ |
54 | +----------------+ +----------------+ |
55 ----------------------------------------------
56 ----------------------------------------------
57 | +-----------------------------------+ |
59 | +-----------------------------------+ |
60 | +-----------------------------------+ |
62 | +-----------------------------------+ |
63 | +-----------------------------------+ |
65 | +-----------------------------------+ |
66 ----------------------------------------------
79 low-level driver that manages the THC Controller and implements HIDSPI/HIDI2C protocol.
83 ------------------------
86 ---------------------------------
88 | +---------------------------+ |
90 | +---------------------------+ |
91 | +---------------------------+ |
93 | +---------------------------+ |
94 +---------------+ | +------------+ +------------+ |
95 | System Memory +---+--+ DMA | | PIO | |
96 +---------------+ | +------------+ +------------+ |
97 | +---------------------------+ |
99 | +---------------------------+ |
100 | +------------+ +------------+ |
103 | +------------+ +------------+ |
104 ---------------------------------
133 ------------------
141 --------------------
164 | --------------------THC sends---------------------------------|
169 | ---------THC Sends---------------||-----Touch IC sends--------|
192 --------------------------
199 - if input packet size <= max size, THC continues using input packet size to finish the reading
200 - if input packet size > max size, there is potential input data crash risk during
207 -------------------
209 Because of MCU performance limitation, some touch devices cannot de-assert interrupt pin
212 case, the delayed interrupt de-assertion will be recognized as a new interrupt signal by THC,
223 ----------
251 Here are the THC pre-defined opcodes for I2C mode:
256 0x12 Read I2C SubIP APB internal registers 0h - FFh
257 0x13 Write I2C SubIP APB internal registers 0h - FFh
264 -------
268 I/O operations, driver should pre-program PIO control registers and PIO data registers and kick
290 - Program read/write data size in THC_SS_BC.
291 - Program I/O target address in THC_SW_SEQ_DATA0_ADDR.
292 - If write, program the write data in THC_SW_SEQ_DATA0..THC_SW_SEQ_DATAn.
293 - Program the PIO opcode in THC_SS_CMD.
294 - Set TSSGO = 1 to start the PIO write sequence.
295 - If THC_SS_CD_IE = 1, SW will receives a MSI when the PIO is completed.
296 - If read, read out the data in THC_SW_SEQ_DATA0..THC_SW_SEQ_DATAn.
299 -------
307 raw data mode. RxDMA2 is used for HID data mode and it is the RxDMA engine currently driver uses
311 software, THC will start auto-handling receiving logic.
334 is the 3rd THC RxDMA engine with the similar functionalities as the existing two RxDMAs, the only
345 THC has one write DMA engine, which can be used for sending data to Touch IC automatically.
347 before last command is completely handled, next command cannot be sent, THC write DMA engine only
356 -------
372 ------------------------ -------------- --------------
373 | PRD table base address +----+ PRD table #1 +-----+ PRD Entry #1 |
374 ------------------------ -------------- --------------
375 --------------
377 --------------
378 --------------
380 --------------
382 The read DMA engine supports multiple PRD tables held within a circular buffer that allow the THC
383 to support multiple data buffers from the Touch IC. This allows host SW to arm the Read DMA engine
388 To simplify the design, SW assumes worst-case memory fragmentation. Therefore,each PRD table shall
390 number of PRD-entries per PRD table.
392 SW allocates up to 128 PRD tables per Read DMA engine as specified in the THC_M_PRT_RPRD_CNTRL.PCD
410 to the PRD which the DMA engine is currently processing. This pointer rolls over once the circular
447 .. code-block:: c
453 In general, every PRD table means one HID touch data packet. Every DMA engine can support
465 --------------
467 - Call ACPI _RST method to reset Touch IC device.
468 - Read the reset response from TIC through PIO read.
469 - Issue a command to retrieve device descriptor from Touch IC through PIO write.
470 - Read the device descriptor from Touch IC through PIO read.
471 - If the device descriptor is valid, allocate DMA buffers and configure all DMA channels.
472 - Issue a command to retrieve report descriptor from Touch IC through DMA.
475 --------------------------
479 - Touch IC interrupts the THC Controller using an in-band THC interrupt.
480 - THC Sequencer reads the input report header by transmitting read approval as a signal
482 - THC Sequencer executes a Input Report Body Read operation corresponding to the value
484 - THC DMA engine begins fetching data from the THC Sequencer and writes to host memory
486 THC Sequencer signals all data has been read or the THC DMA Read Engine reaches the
488 - The THC Sequencer checks for the “Last Fragment Flag” bit in the Input Report Header.
490 - If the “Last Fragment Flag” bit is enabled the THC Sequencer enters End-of-Frame Processing.
492 THC Sequencer End of Frame Processing:
494 - THC DMA engine increments the read pointer of the Read PRD CB, sets EOF interrupt status
496 - If THC EOF interrupt is enabled by the driver in the control register (THC_M_PRT_READ_DMA_CNTRL_2…
501 - THC QuickSPI driver checks CB write Ptr and CB read Ptr to identify if any data frame in DMA
503 - THC QuickSPI driver gets first unprocessed PRD table.
504 - THC QuickSPI driver scans all PRD entries in this PRD table to calculate the total frame size.
505 - THC QuickSPI driver copies all frame data out.
506 - THC QuickSPI driver checks the data type according to input report body, and calls related
508 - THC QuickSPI driver updates write Ptr.
511 ---------------------------
515 - HID core calls raw_request callback with a request to THC QuickSPI driver.
516 - THC QuickSPI Driver converts request provided data into the output report packet and copies it
518 - Start TxDMA to complete the write operation.
524 --------------
526 - Read device descriptor from Touch IC device through PIO write followed by read.
527 - If the device descriptor is valid, allocate DMA buffers and configure all DMA channels.
528 - Use PIO or TxDMA to write a SET_POWER request to TIC's command register, and check if the
530 - Use PIO or TxDMA to write a RESET request to TIC's command register. If the write operation
532 - Use SWDMA to read report descriptor through TIC's report descriptor register.
535 --------------------------
539 - Touch IC asserts the interrupt indicating that it has an interrupt to send to HOST.
542 - THC Sequencer continues the Read operation as per the size of data indicated in the
544 - THC DMA engine begins fetching data from the THC Sequencer and writes to host memory
547 signals all data has been read or the THC DMA Read Engine reaches the end of it's last
549 - THC Sequencer enters End-of-Input Report Processing.
550 - If the device has no more input reports to send to the host, it de-asserts the interrupt
554 THC Sequencer End of Input Report Processing:
556 - THC DMA engine increments the read pointer of the Read PRD CB, sets EOF interrupt status
558 - If THC EOF interrupt is enabled by the driver in the control register
563 - THC QuickI2C driver checks CB write Ptr and CB read Ptr to identify if any data frame in DMA
565 - THC QuickI2C driver gets first unprocessed PRD table.
566 - THC QuickI2C driver scans all PRD entries in this PRD table to calculate the total frame size.
567 - THC QuickI2C driver copies all frame data out.
568 - THC QuickI2C driver call hid_input_report to send the input report content to HID core, which
571 - THC QuickI2C driver updates write Ptr.
574 ---------------------------
578 - HID core call THC QuickI2C raw_request callback.
579 - THC QuickI2C uses PIO or TXDMA to write a SET_REPORT request to TIC's command register. Report
581 - THC QuickI2C programs TxDMA buffer with TX Data to be written to TIC's data register. The first
595 - HIDSPI: https://download.microsoft.com/download/c/a/0/ca07aef3-3e10-4022-b1e9-c98cea99465d/HidSpi…
596 - HIDI2C: https://download.microsoft.com/download/7/d/d/7dd44bb7-2a7a-4505-ac1c-7227d3d96d5b/hid-ov…