Lines Matching +full:num +full:- +full:transfer +full:- +full:bits
1 // SPDX-License-Identifier: GPL-2.0-only
79 #define MASK_SPBRR_SPBR_BITS ((1 << 10) - 1)
123 * struct pch_spi_data - Holds the SPI channel specific details
130 * @transfer_complete: Status of SPI Transfer
135 * @bpw_len: Length of data to be transferred in bits per
137 * @transfer_active: Flag showing active transfer
139 * transfer
141 * transfer
150 * @cur_trans: The current transfer that this SPI driver is
191 * struct pch_spi_board_data - Holds the SPI device specific details
194 * @num: The number of SPI device instance
199 int num; member
203 int num; member
217 * pch_spi_writereg() - Performs register writes
225 iowrite32(val, (data->io_remap_addr + idx)); in pch_spi_writereg()
229 * pch_spi_readreg() - Performs register reads
236 return ioread32(data->io_remap_addr + idx); in pch_spi_readreg()
253 * pch_spi_clear_fifo() - Clears the Transmit and Receive FIFOs
276 if (data->transfer_active) { in pch_spi_handler_sub()
277 rx_index = data->rx_index; in pch_spi_handler_sub()
278 tx_index = data->tx_index; in pch_spi_handler_sub()
279 bpw_len = data->bpw_len; in pch_spi_handler_sub()
280 pkt_rx_buffer = data->pkt_rx_buff; in pch_spi_handler_sub()
281 pkt_tx_buff = data->pkt_tx_buff; in pch_spi_handler_sub()
295 if ((bpw_len - rx_index) <= PCH_MAX_FIFO_DEPTH) { in pch_spi_handler_sub()
307 data->tx_index = tx_index; in pch_spi_handler_sub()
308 data->rx_index = rx_index; in pch_spi_handler_sub()
310 /* if transfer complete interrupt */ in pch_spi_handler_sub()
314 pch_spi_setclr_reg(data->master, PCH_SPCR, 0, in pch_spi_handler_sub()
317 /* transfer is completed; in pch_spi_handler_sub()
319 data->transfer_complete = true; in pch_spi_handler_sub()
320 data->transfer_active = false; in pch_spi_handler_sub()
321 wake_up(&data->wait); in pch_spi_handler_sub()
323 dev_vdbg(&data->master->dev, in pch_spi_handler_sub()
324 "%s : Transfer is not completed", in pch_spi_handler_sub()
332 * pch_spi_handler() - Interrupt handler
343 struct pch_spi_board_data *board_dat = data->board_dat; in pch_spi_handler()
345 if (board_dat->suspend_sts) { in pch_spi_handler()
346 dev_dbg(&board_dat->pdev->dev, in pch_spi_handler()
351 io_remap_addr = data->io_remap_addr; in pch_spi_handler()
357 dev_err(&board_dat->pdev->dev, "%s Over run error\n", __func__); in pch_spi_handler()
358 if (data->current_msg->complete) { in pch_spi_handler()
359 data->transfer_complete = true; in pch_spi_handler()
360 data->current_msg->status = -EIO; in pch_spi_handler()
361 data->current_msg->complete(data->current_msg->context); in pch_spi_handler()
362 data->bcurrent_msg_processing = false; in pch_spi_handler()
363 data->current_msg = NULL; in pch_spi_handler()
364 data->cur_trans = NULL; in pch_spi_handler()
368 if (data->use_dma) in pch_spi_handler()
377 dev_dbg(&board_dat->pdev->dev, "%s EXIT return value=%d\n", in pch_spi_handler()
384 * pch_spi_set_baud_rate() - Sets SPBR field in SPBRR
400 * pch_spi_set_bits_per_word() - Sets SIZE field in SPBRR
402 * @bits_per_word: Bits per word for SPI transfer.
414 * pch_spi_setup_transfer() - Configures the PCH SPI hardware for transfer
421 dev_dbg(&spi->dev, "%s SPBRR content =%x setting baud rate=%d\n", in pch_spi_setup_transfer()
422 __func__, pch_spi_readreg(spi->master, PCH_SPBRR), in pch_spi_setup_transfer()
423 spi->max_speed_hz); in pch_spi_setup_transfer()
424 pch_spi_set_baud_rate(spi->master, spi->max_speed_hz); in pch_spi_setup_transfer()
426 /* set bits per word */ in pch_spi_setup_transfer()
427 pch_spi_set_bits_per_word(spi->master, spi->bits_per_word); in pch_spi_setup_transfer()
429 if (!(spi->mode & SPI_LSB_FIRST)) in pch_spi_setup_transfer()
431 if (spi->mode & SPI_CPOL) in pch_spi_setup_transfer()
433 if (spi->mode & SPI_CPHA) in pch_spi_setup_transfer()
435 pch_spi_setclr_reg(spi->master, PCH_SPCR, flags, in pch_spi_setup_transfer()
439 pch_spi_clear_fifo(spi->master); in pch_spi_setup_transfer()
443 * pch_spi_reset() - Clears SPI registers
458 struct spi_transfer *transfer; in pch_spi_transfer() local
459 struct pch_spi_data *data = spi_master_get_devdata(pspi->master); in pch_spi_transfer()
463 spin_lock_irqsave(&data->lock, flags); in pch_spi_transfer()
464 /* validate Tx/Rx buffers and Transfer length */ in pch_spi_transfer()
465 list_for_each_entry(transfer, &pmsg->transfers, transfer_list) { in pch_spi_transfer()
466 if (!transfer->tx_buf && !transfer->rx_buf) { in pch_spi_transfer()
467 dev_err(&pspi->dev, in pch_spi_transfer()
469 retval = -EINVAL; in pch_spi_transfer()
473 if (!transfer->len) { in pch_spi_transfer()
474 dev_err(&pspi->dev, "%s Transfer length invalid\n", in pch_spi_transfer()
476 retval = -EINVAL; in pch_spi_transfer()
480 dev_dbg(&pspi->dev, in pch_spi_transfer()
481 "%s Tx/Rx buffer valid. Transfer length valid\n", in pch_spi_transfer()
484 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_transfer()
487 if (data->status == STATUS_EXITING) { in pch_spi_transfer()
488 dev_err(&pspi->dev, "%s status = STATUS_EXITING.\n", __func__); in pch_spi_transfer()
489 retval = -ESHUTDOWN; in pch_spi_transfer()
493 /* If suspended ,return -EINVAL */ in pch_spi_transfer()
494 if (data->board_dat->suspend_sts) { in pch_spi_transfer()
495 dev_err(&pspi->dev, "%s suspend; returning EINVAL\n", __func__); in pch_spi_transfer()
496 retval = -EINVAL; in pch_spi_transfer()
501 pmsg->actual_length = 0; in pch_spi_transfer()
502 dev_dbg(&pspi->dev, "%s - pmsg->status =%d\n", __func__, pmsg->status); in pch_spi_transfer()
504 pmsg->status = -EINPROGRESS; in pch_spi_transfer()
505 spin_lock_irqsave(&data->lock, flags); in pch_spi_transfer()
507 list_add_tail(&pmsg->queue, &data->queue); in pch_spi_transfer()
508 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_transfer()
510 dev_dbg(&pspi->dev, "%s - Invoked list_add_tail\n", __func__); in pch_spi_transfer()
512 schedule_work(&data->work); in pch_spi_transfer()
513 dev_dbg(&pspi->dev, "%s - Invoked queue work\n", __func__); in pch_spi_transfer()
518 dev_dbg(&pspi->dev, "%s RETURN=%d\n", __func__, retval); in pch_spi_transfer()
521 dev_dbg(&pspi->dev, "%s RETURN=%d\n", __func__, retval); in pch_spi_transfer()
522 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_transfer()
529 if (data->current_chip != NULL) { in pch_spi_select_chip()
530 if (pspi->chip_select != data->n_curnt_chip) { in pch_spi_select_chip()
531 dev_dbg(&pspi->dev, "%s : different slave\n", __func__); in pch_spi_select_chip()
532 data->current_chip = NULL; in pch_spi_select_chip()
536 data->current_chip = pspi; in pch_spi_select_chip()
538 data->n_curnt_chip = data->current_chip->chip_select; in pch_spi_select_chip()
540 dev_dbg(&pspi->dev, "%s :Invoking pch_spi_setup_transfer\n", __func__); in pch_spi_select_chip()
554 if (data->cur_trans->speed_hz) { in pch_spi_set_tx()
555 dev_dbg(&data->master->dev, "%s:setting baud rate\n", __func__); in pch_spi_set_tx()
556 pch_spi_set_baud_rate(data->master, data->cur_trans->speed_hz); in pch_spi_set_tx()
559 /* set bits per word if needed */ in pch_spi_set_tx()
560 if (data->cur_trans->bits_per_word && in pch_spi_set_tx()
561 (data->current_msg->spi->bits_per_word != data->cur_trans->bits_per_word)) { in pch_spi_set_tx()
562 dev_dbg(&data->master->dev, "%s:set bits per word\n", __func__); in pch_spi_set_tx()
563 pch_spi_set_bits_per_word(data->master, in pch_spi_set_tx()
564 data->cur_trans->bits_per_word); in pch_spi_set_tx()
565 *bpw = data->cur_trans->bits_per_word; in pch_spi_set_tx()
567 *bpw = data->current_msg->spi->bits_per_word; in pch_spi_set_tx()
571 data->tx_index = 0; in pch_spi_set_tx()
572 data->rx_index = 0; in pch_spi_set_tx()
574 data->bpw_len = data->cur_trans->len / (*bpw / 8); in pch_spi_set_tx()
577 size = data->cur_trans->len * sizeof(*data->pkt_tx_buff); in pch_spi_set_tx()
580 data->pkt_tx_buff = kzalloc(size, GFP_KERNEL); in pch_spi_set_tx()
581 if (data->pkt_tx_buff != NULL) { in pch_spi_set_tx()
582 data->pkt_rx_buff = kzalloc(size, GFP_KERNEL); in pch_spi_set_tx()
583 if (!data->pkt_rx_buff) { in pch_spi_set_tx()
584 kfree(data->pkt_tx_buff); in pch_spi_set_tx()
585 data->pkt_tx_buff = NULL; in pch_spi_set_tx()
589 if (!data->pkt_rx_buff) { in pch_spi_set_tx()
590 /* flush queue and set status of all transfers to -ENOMEM */ in pch_spi_set_tx()
591 list_for_each_entry_safe(pmsg, tmp, data->queue.next, queue) { in pch_spi_set_tx()
592 pmsg->status = -ENOMEM; in pch_spi_set_tx()
594 if (pmsg->complete) in pch_spi_set_tx()
595 pmsg->complete(pmsg->context); in pch_spi_set_tx()
598 list_del_init(&pmsg->queue); in pch_spi_set_tx()
604 if (data->cur_trans->tx_buf != NULL) { in pch_spi_set_tx()
606 tx_buf = data->cur_trans->tx_buf; in pch_spi_set_tx()
607 for (j = 0; j < data->bpw_len; j++) in pch_spi_set_tx()
608 data->pkt_tx_buff[j] = *tx_buf++; in pch_spi_set_tx()
610 tx_sbuf = data->cur_trans->tx_buf; in pch_spi_set_tx()
611 for (j = 0; j < data->bpw_len; j++) in pch_spi_set_tx()
612 data->pkt_tx_buff[j] = *tx_sbuf++; in pch_spi_set_tx()
617 n_writes = data->bpw_len; in pch_spi_set_tx()
621 dev_dbg(&data->master->dev, in pch_spi_set_tx()
622 "\n%s:Pulling down SSN low - writing 0x2 to SSNXCR\n", in pch_spi_set_tx()
624 pch_spi_writereg(data->master, PCH_SSNXCR, SSN_LOW); in pch_spi_set_tx()
627 pch_spi_writereg(data->master, PCH_SPDWR, data->pkt_tx_buff[j]); in pch_spi_set_tx()
630 data->tx_index = j; in pch_spi_set_tx()
632 /* reset transfer complete flag */ in pch_spi_set_tx()
633 data->transfer_complete = false; in pch_spi_set_tx()
634 data->transfer_active = true; in pch_spi_set_tx()
640 dev_dbg(&data->master->dev, "%s called\n", __func__); in pch_spi_nomore_transfer()
642 * [To the spi core..indicating end of transfer] */ in pch_spi_nomore_transfer()
643 data->current_msg->status = 0; in pch_spi_nomore_transfer()
645 if (data->current_msg->complete) { in pch_spi_nomore_transfer()
646 dev_dbg(&data->master->dev, in pch_spi_nomore_transfer()
648 data->current_msg->complete(data->current_msg->context); in pch_spi_nomore_transfer()
652 data->bcurrent_msg_processing = false; in pch_spi_nomore_transfer()
654 dev_dbg(&data->master->dev, in pch_spi_nomore_transfer()
655 "%s:data->bcurrent_msg_processing = false\n", __func__); in pch_spi_nomore_transfer()
657 data->current_msg = NULL; in pch_spi_nomore_transfer()
658 data->cur_trans = NULL; in pch_spi_nomore_transfer()
662 if ((list_empty(&data->queue) == 0) && in pch_spi_nomore_transfer()
663 (!data->board_dat->suspend_sts) && in pch_spi_nomore_transfer()
664 (data->status != STATUS_EXITING)) { in pch_spi_nomore_transfer()
669 dev_dbg(&data->master->dev, "%s:Invoke queue_work\n", __func__); in pch_spi_nomore_transfer()
670 schedule_work(&data->work); in pch_spi_nomore_transfer()
671 } else if (data->board_dat->suspend_sts || in pch_spi_nomore_transfer()
672 data->status == STATUS_EXITING) { in pch_spi_nomore_transfer()
673 dev_dbg(&data->master->dev, in pch_spi_nomore_transfer()
676 list_for_each_entry_safe(pmsg, tmp, data->queue.next, queue) { in pch_spi_nomore_transfer()
677 pmsg->status = -EIO; in pch_spi_nomore_transfer()
679 if (pmsg->complete) in pch_spi_nomore_transfer()
680 pmsg->complete(pmsg->context); in pch_spi_nomore_transfer()
683 list_del_init(&pmsg->queue); in pch_spi_nomore_transfer()
691 if ((data->bpw_len) > PCH_MAX_FIFO_DEPTH) in pch_spi_set_ir()
693 pch_spi_setclr_reg(data->master, PCH_SPCR, in pch_spi_set_ir()
700 pch_spi_setclr_reg(data->master, PCH_SPCR, in pch_spi_set_ir()
706 /* Wait until the transfer completes; go to sleep after in pch_spi_set_ir()
707 initiating the transfer. */ in pch_spi_set_ir()
708 dev_dbg(&data->master->dev, in pch_spi_set_ir()
709 "%s:waiting for transfer to get over\n", __func__); in pch_spi_set_ir()
711 wait_event_interruptible(data->wait, data->transfer_complete); in pch_spi_set_ir()
714 pch_spi_writereg(data->master, PCH_SPSR, in pch_spi_set_ir()
715 pch_spi_readreg(data->master, PCH_SPSR)); in pch_spi_set_ir()
716 /* Disable interrupts and SPI transfer */ in pch_spi_set_ir()
717 pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL | SPCR_SPE_BIT); in pch_spi_set_ir()
719 pch_spi_clear_fifo(data->master); in pch_spi_set_ir()
729 if (!data->cur_trans->rx_buf) in pch_spi_copy_rx_data()
733 rx_buf = data->cur_trans->rx_buf; in pch_spi_copy_rx_data()
734 for (j = 0; j < data->bpw_len; j++) in pch_spi_copy_rx_data()
735 *rx_buf++ = data->pkt_rx_buff[j] & 0xFF; in pch_spi_copy_rx_data()
737 rx_sbuf = data->cur_trans->rx_buf; in pch_spi_copy_rx_data()
738 for (j = 0; j < data->bpw_len; j++) in pch_spi_copy_rx_data()
739 *rx_sbuf++ = data->pkt_rx_buff[j]; in pch_spi_copy_rx_data()
752 if (!data->cur_trans->rx_buf) in pch_spi_copy_rx_data_for_dma()
756 rx_buf = data->cur_trans->rx_buf; in pch_spi_copy_rx_data_for_dma()
757 rx_dma_buf = data->dma.rx_buf_virt; in pch_spi_copy_rx_data_for_dma()
758 for (j = 0; j < data->bpw_len; j++) in pch_spi_copy_rx_data_for_dma()
760 data->cur_trans->rx_buf = rx_buf; in pch_spi_copy_rx_data_for_dma()
762 rx_sbuf = data->cur_trans->rx_buf; in pch_spi_copy_rx_data_for_dma()
763 rx_dma_sbuf = data->dma.rx_buf_virt; in pch_spi_copy_rx_data_for_dma()
764 for (j = 0; j < data->bpw_len; j++) in pch_spi_copy_rx_data_for_dma()
766 data->cur_trans->rx_buf = rx_sbuf; in pch_spi_copy_rx_data_for_dma()
776 dma = &data->dma; in pch_spi_start_transfer()
778 spin_lock_irqsave(&data->lock, flags); in pch_spi_start_transfer()
781 pch_spi_setclr_reg(data->master, PCH_SPCR, SPCR_SPE_BIT, PCH_ALL); in pch_spi_start_transfer()
783 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_start_transfer()
785 /* Wait until the transfer completes; go to sleep after in pch_spi_start_transfer()
786 initiating the transfer. */ in pch_spi_start_transfer()
787 dev_dbg(&data->master->dev, in pch_spi_start_transfer()
788 "%s:waiting for transfer to get over\n", __func__); in pch_spi_start_transfer()
789 rtn = wait_event_interruptible_timeout(data->wait, in pch_spi_start_transfer()
790 data->transfer_complete, in pch_spi_start_transfer()
793 dev_err(&data->master->dev, in pch_spi_start_transfer()
794 "%s wait-event timeout\n", __func__); in pch_spi_start_transfer()
796 dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent, in pch_spi_start_transfer()
799 dma_sync_sg_for_cpu(&data->master->dev, dma->sg_tx_p, dma->nent, in pch_spi_start_transfer()
801 memset(data->dma.tx_buf_virt, 0, PAGE_SIZE); in pch_spi_start_transfer()
803 async_tx_ack(dma->desc_rx); in pch_spi_start_transfer()
804 async_tx_ack(dma->desc_tx); in pch_spi_start_transfer()
805 kfree(dma->sg_tx_p); in pch_spi_start_transfer()
806 kfree(dma->sg_rx_p); in pch_spi_start_transfer()
808 spin_lock_irqsave(&data->lock, flags); in pch_spi_start_transfer()
810 /* clear fifo threshold, disable interrupts, disable SPI transfer */ in pch_spi_start_transfer()
811 pch_spi_setclr_reg(data->master, PCH_SPCR, 0, in pch_spi_start_transfer()
815 pch_spi_writereg(data->master, PCH_SPSR, in pch_spi_start_transfer()
816 pch_spi_readreg(data->master, PCH_SPSR)); in pch_spi_start_transfer()
818 pch_spi_clear_fifo(data->master); in pch_spi_start_transfer()
820 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_start_transfer()
829 /* transfer is completed;inform pch_spi_process_messages_dma */ in pch_dma_rx_complete()
830 data->transfer_complete = true; in pch_dma_rx_complete()
831 wake_up_interruptible(&data->wait); in pch_dma_rx_complete()
838 if ((chan->chan_id == param->chan_id) && in pch_spi_filter()
839 (param->dma_dev == chan->device->dev)) { in pch_spi_filter()
840 chan->private = param; in pch_spi_filter()
861 dma = &data->dma; in pch_spi_request_dma()
866 dma_dev = pci_get_slot(data->board_dat->pdev->bus, in pch_spi_request_dma()
867 PCI_DEVFN(PCI_SLOT(data->board_dat->pdev->devfn), 0)); in pch_spi_request_dma()
870 param = &dma->param_tx; in pch_spi_request_dma()
871 param->dma_dev = &dma_dev->dev; in pch_spi_request_dma()
872 param->chan_id = data->ch * 2; /* Tx = 0, 2 */ in pch_spi_request_dma()
873 param->tx_reg = data->io_base_addr + PCH_SPDWR; in pch_spi_request_dma()
874 param->width = width; in pch_spi_request_dma()
877 dev_err(&data->master->dev, in pch_spi_request_dma()
879 data->use_dma = 0; in pch_spi_request_dma()
882 dma->chan_tx = chan; in pch_spi_request_dma()
885 param = &dma->param_rx; in pch_spi_request_dma()
886 param->dma_dev = &dma_dev->dev; in pch_spi_request_dma()
887 param->chan_id = data->ch * 2 + 1; /* Rx = Tx + 1 */ in pch_spi_request_dma()
888 param->rx_reg = data->io_base_addr + PCH_SPDRR; in pch_spi_request_dma()
889 param->width = width; in pch_spi_request_dma()
892 dev_err(&data->master->dev, in pch_spi_request_dma()
894 dma_release_channel(dma->chan_tx); in pch_spi_request_dma()
895 dma->chan_tx = NULL; in pch_spi_request_dma()
896 data->use_dma = 0; in pch_spi_request_dma()
899 dma->chan_rx = chan; in pch_spi_request_dma()
906 dma = &data->dma; in pch_spi_release_dma()
907 if (dma->chan_tx) { in pch_spi_release_dma()
908 dma_release_channel(dma->chan_tx); in pch_spi_release_dma()
909 dma->chan_tx = NULL; in pch_spi_release_dma()
911 if (dma->chan_rx) { in pch_spi_release_dma()
912 dma_release_channel(dma->chan_rx); in pch_spi_release_dma()
913 dma->chan_rx = NULL; in pch_spi_release_dma()
926 int num; in pch_spi_handle_dma() local
934 dma = &data->dma; in pch_spi_handle_dma()
937 if (data->cur_trans->speed_hz) { in pch_spi_handle_dma()
938 dev_dbg(&data->master->dev, "%s:setting baud rate\n", __func__); in pch_spi_handle_dma()
939 spin_lock_irqsave(&data->lock, flags); in pch_spi_handle_dma()
940 pch_spi_set_baud_rate(data->master, data->cur_trans->speed_hz); in pch_spi_handle_dma()
941 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_handle_dma()
944 /* set bits per word if needed */ in pch_spi_handle_dma()
945 if (data->cur_trans->bits_per_word && in pch_spi_handle_dma()
946 (data->current_msg->spi->bits_per_word != in pch_spi_handle_dma()
947 data->cur_trans->bits_per_word)) { in pch_spi_handle_dma()
948 dev_dbg(&data->master->dev, "%s:set bits per word\n", __func__); in pch_spi_handle_dma()
949 spin_lock_irqsave(&data->lock, flags); in pch_spi_handle_dma()
950 pch_spi_set_bits_per_word(data->master, in pch_spi_handle_dma()
951 data->cur_trans->bits_per_word); in pch_spi_handle_dma()
952 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_handle_dma()
953 *bpw = data->cur_trans->bits_per_word; in pch_spi_handle_dma()
955 *bpw = data->current_msg->spi->bits_per_word; in pch_spi_handle_dma()
957 data->bpw_len = data->cur_trans->len / (*bpw / 8); in pch_spi_handle_dma()
959 if (data->bpw_len > PCH_BUF_SIZE) { in pch_spi_handle_dma()
960 data->bpw_len = PCH_BUF_SIZE; in pch_spi_handle_dma()
961 data->cur_trans->len -= PCH_BUF_SIZE; in pch_spi_handle_dma()
965 if (data->cur_trans->tx_buf != NULL) { in pch_spi_handle_dma()
967 tx_buf = data->cur_trans->tx_buf; in pch_spi_handle_dma()
968 tx_dma_buf = dma->tx_buf_virt; in pch_spi_handle_dma()
969 for (i = 0; i < data->bpw_len; i++) in pch_spi_handle_dma()
972 tx_sbuf = data->cur_trans->tx_buf; in pch_spi_handle_dma()
973 tx_dma_sbuf = dma->tx_buf_virt; in pch_spi_handle_dma()
974 for (i = 0; i < data->bpw_len; i++) in pch_spi_handle_dma()
980 if (data->bpw_len > PCH_DMA_TRANS_SIZE) { in pch_spi_handle_dma()
981 if (data->bpw_len % PCH_DMA_TRANS_SIZE) { in pch_spi_handle_dma()
982 num = data->bpw_len / PCH_DMA_TRANS_SIZE + 1; in pch_spi_handle_dma()
983 rem = data->bpw_len % PCH_DMA_TRANS_SIZE; in pch_spi_handle_dma()
985 num = data->bpw_len / PCH_DMA_TRANS_SIZE; in pch_spi_handle_dma()
990 num = 1; in pch_spi_handle_dma()
991 size = data->bpw_len; in pch_spi_handle_dma()
992 rem = data->bpw_len; in pch_spi_handle_dma()
994 dev_dbg(&data->master->dev, "%s num=%d size=%d rem=%d\n", in pch_spi_handle_dma()
995 __func__, num, size, rem); in pch_spi_handle_dma()
996 spin_lock_irqsave(&data->lock, flags); in pch_spi_handle_dma()
999 pch_spi_setclr_reg(data->master, PCH_SPCR, in pch_spi_handle_dma()
1000 ((size - 1) << SPCR_RFIC_FIELD) | in pch_spi_handle_dma()
1004 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_handle_dma()
1007 dma->sg_rx_p = kmalloc_array(num, sizeof(*dma->sg_rx_p), GFP_ATOMIC); in pch_spi_handle_dma()
1008 if (!dma->sg_rx_p) in pch_spi_handle_dma()
1011 sg_init_table(dma->sg_rx_p, num); /* Initialize SG table */ in pch_spi_handle_dma()
1013 sg = dma->sg_rx_p; in pch_spi_handle_dma()
1014 for (i = 0; i < num; i++, sg++) { in pch_spi_handle_dma()
1015 if (i == (num - 2)) { in pch_spi_handle_dma()
1016 sg->offset = size * i; in pch_spi_handle_dma()
1017 sg->offset = sg->offset * (*bpw / 8); in pch_spi_handle_dma()
1018 sg_set_page(sg, virt_to_page(dma->rx_buf_virt), rem, in pch_spi_handle_dma()
1019 sg->offset); in pch_spi_handle_dma()
1021 } else if (i == (num - 1)) { in pch_spi_handle_dma()
1022 sg->offset = size * (i - 1) + rem; in pch_spi_handle_dma()
1023 sg->offset = sg->offset * (*bpw / 8); in pch_spi_handle_dma()
1024 sg_set_page(sg, virt_to_page(dma->rx_buf_virt), size, in pch_spi_handle_dma()
1025 sg->offset); in pch_spi_handle_dma()
1028 sg->offset = size * i; in pch_spi_handle_dma()
1029 sg->offset = sg->offset * (*bpw / 8); in pch_spi_handle_dma()
1030 sg_set_page(sg, virt_to_page(dma->rx_buf_virt), size, in pch_spi_handle_dma()
1031 sg->offset); in pch_spi_handle_dma()
1034 sg_dma_address(sg) = dma->rx_buf_dma + sg->offset; in pch_spi_handle_dma()
1036 sg = dma->sg_rx_p; in pch_spi_handle_dma()
1037 desc_rx = dmaengine_prep_slave_sg(dma->chan_rx, sg, in pch_spi_handle_dma()
1038 num, DMA_DEV_TO_MEM, in pch_spi_handle_dma()
1041 dev_err(&data->master->dev, in pch_spi_handle_dma()
1045 dma_sync_sg_for_device(&data->master->dev, sg, num, DMA_FROM_DEVICE); in pch_spi_handle_dma()
1046 desc_rx->callback = pch_dma_rx_complete; in pch_spi_handle_dma()
1047 desc_rx->callback_param = data; in pch_spi_handle_dma()
1048 dma->nent = num; in pch_spi_handle_dma()
1049 dma->desc_rx = desc_rx; in pch_spi_handle_dma()
1052 if (data->bpw_len > PCH_MAX_FIFO_DEPTH) { in pch_spi_handle_dma()
1053 head = PCH_MAX_FIFO_DEPTH - PCH_DMA_TRANS_SIZE; in pch_spi_handle_dma()
1054 if (data->bpw_len % PCH_DMA_TRANS_SIZE > 4) { in pch_spi_handle_dma()
1055 num = data->bpw_len / PCH_DMA_TRANS_SIZE + 1; in pch_spi_handle_dma()
1056 rem = data->bpw_len % PCH_DMA_TRANS_SIZE - head; in pch_spi_handle_dma()
1058 num = data->bpw_len / PCH_DMA_TRANS_SIZE; in pch_spi_handle_dma()
1059 rem = data->bpw_len % PCH_DMA_TRANS_SIZE + in pch_spi_handle_dma()
1060 PCH_DMA_TRANS_SIZE - head; in pch_spi_handle_dma()
1064 num = 1; in pch_spi_handle_dma()
1065 size = data->bpw_len; in pch_spi_handle_dma()
1066 rem = data->bpw_len; in pch_spi_handle_dma()
1070 dma->sg_tx_p = kmalloc_array(num, sizeof(*dma->sg_tx_p), GFP_ATOMIC); in pch_spi_handle_dma()
1071 if (!dma->sg_tx_p) in pch_spi_handle_dma()
1074 sg_init_table(dma->sg_tx_p, num); /* Initialize SG table */ in pch_spi_handle_dma()
1076 sg = dma->sg_tx_p; in pch_spi_handle_dma()
1077 for (i = 0; i < num; i++, sg++) { in pch_spi_handle_dma()
1079 sg->offset = 0; in pch_spi_handle_dma()
1080 sg_set_page(sg, virt_to_page(dma->tx_buf_virt), size + head, in pch_spi_handle_dma()
1081 sg->offset); in pch_spi_handle_dma()
1083 } else if (i == (num - 1)) { in pch_spi_handle_dma()
1084 sg->offset = head + size * i; in pch_spi_handle_dma()
1085 sg->offset = sg->offset * (*bpw / 8); in pch_spi_handle_dma()
1086 sg_set_page(sg, virt_to_page(dma->tx_buf_virt), rem, in pch_spi_handle_dma()
1087 sg->offset); in pch_spi_handle_dma()
1090 sg->offset = head + size * i; in pch_spi_handle_dma()
1091 sg->offset = sg->offset * (*bpw / 8); in pch_spi_handle_dma()
1092 sg_set_page(sg, virt_to_page(dma->tx_buf_virt), size, in pch_spi_handle_dma()
1093 sg->offset); in pch_spi_handle_dma()
1096 sg_dma_address(sg) = dma->tx_buf_dma + sg->offset; in pch_spi_handle_dma()
1098 sg = dma->sg_tx_p; in pch_spi_handle_dma()
1099 desc_tx = dmaengine_prep_slave_sg(dma->chan_tx, in pch_spi_handle_dma()
1100 sg, num, DMA_MEM_TO_DEV, in pch_spi_handle_dma()
1103 dev_err(&data->master->dev, in pch_spi_handle_dma()
1107 dma_sync_sg_for_device(&data->master->dev, sg, num, DMA_TO_DEVICE); in pch_spi_handle_dma()
1108 desc_tx->callback = NULL; in pch_spi_handle_dma()
1109 desc_tx->callback_param = data; in pch_spi_handle_dma()
1110 dma->nent = num; in pch_spi_handle_dma()
1111 dma->desc_tx = desc_tx; in pch_spi_handle_dma()
1113 dev_dbg(&data->master->dev, "%s:Pulling down SSN low - writing 0x2 to SSNXCR\n", __func__); in pch_spi_handle_dma()
1115 spin_lock_irqsave(&data->lock, flags); in pch_spi_handle_dma()
1116 pch_spi_writereg(data->master, PCH_SSNXCR, SSN_LOW); in pch_spi_handle_dma()
1117 desc_rx->tx_submit(desc_rx); in pch_spi_handle_dma()
1118 desc_tx->tx_submit(desc_tx); in pch_spi_handle_dma()
1119 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_handle_dma()
1121 /* reset transfer complete flag */ in pch_spi_handle_dma()
1122 data->transfer_complete = false; in pch_spi_handle_dma()
1132 dev_dbg(&data->master->dev, "%s data initialized\n", __func__); in pch_spi_process_messages()
1134 spin_lock(&data->lock); in pch_spi_process_messages()
1136 if (data->board_dat->suspend_sts || (data->status == STATUS_EXITING)) { in pch_spi_process_messages()
1137 dev_dbg(&data->master->dev, in pch_spi_process_messages()
1139 list_for_each_entry_safe(pmsg, tmp, data->queue.next, queue) { in pch_spi_process_messages()
1140 pmsg->status = -EIO; in pch_spi_process_messages()
1142 if (pmsg->complete) { in pch_spi_process_messages()
1143 spin_unlock(&data->lock); in pch_spi_process_messages()
1144 pmsg->complete(pmsg->context); in pch_spi_process_messages()
1145 spin_lock(&data->lock); in pch_spi_process_messages()
1149 list_del_init(&pmsg->queue); in pch_spi_process_messages()
1152 spin_unlock(&data->lock); in pch_spi_process_messages()
1156 data->bcurrent_msg_processing = true; in pch_spi_process_messages()
1157 dev_dbg(&data->master->dev, in pch_spi_process_messages()
1158 "%s Set data->bcurrent_msg_processing= true\n", __func__); in pch_spi_process_messages()
1161 data->current_msg = list_entry(data->queue.next, struct spi_message, in pch_spi_process_messages()
1164 list_del_init(&data->current_msg->queue); in pch_spi_process_messages()
1166 data->current_msg->status = 0; in pch_spi_process_messages()
1168 pch_spi_select_chip(data, data->current_msg->spi); in pch_spi_process_messages()
1170 spin_unlock(&data->lock); in pch_spi_process_messages()
1172 if (data->use_dma) in pch_spi_process_messages()
1174 data->current_msg->spi->bits_per_word); in pch_spi_process_messages()
1175 pch_spi_writereg(data->master, PCH_SSNXCR, SSN_NO_CONTROL); in pch_spi_process_messages()
1179 transfer structure from the message otherwise retrieve in pch_spi_process_messages()
1180 the 1st transfer request from the message. */ in pch_spi_process_messages()
1181 spin_lock(&data->lock); in pch_spi_process_messages()
1182 if (data->cur_trans == NULL) { in pch_spi_process_messages()
1183 data->cur_trans = in pch_spi_process_messages()
1184 list_entry(data->current_msg->transfers.next, in pch_spi_process_messages()
1186 dev_dbg(&data->master->dev, in pch_spi_process_messages()
1187 "%s :Getting 1st transfer message\n", in pch_spi_process_messages()
1190 data->cur_trans = in pch_spi_process_messages()
1191 list_entry(data->cur_trans->transfer_list.next, in pch_spi_process_messages()
1193 dev_dbg(&data->master->dev, in pch_spi_process_messages()
1194 "%s :Getting next transfer message\n", in pch_spi_process_messages()
1197 spin_unlock(&data->lock); in pch_spi_process_messages()
1199 if (!data->cur_trans->len) in pch_spi_process_messages()
1201 cnt = (data->cur_trans->len - 1) / PCH_BUF_SIZE + 1; in pch_spi_process_messages()
1202 data->save_total_len = data->cur_trans->len; in pch_spi_process_messages()
1203 if (data->use_dma) { in pch_spi_process_messages()
1205 char *save_rx_buf = data->cur_trans->rx_buf; in pch_spi_process_messages()
1210 data->transfer_complete = true; in pch_spi_process_messages()
1211 data->current_msg->status = -EIO; in pch_spi_process_messages()
1212 data->current_msg->complete in pch_spi_process_messages()
1213 (data->current_msg->context); in pch_spi_process_messages()
1214 data->bcurrent_msg_processing = false; in pch_spi_process_messages()
1215 data->current_msg = NULL; in pch_spi_process_messages()
1216 data->cur_trans = NULL; in pch_spi_process_messages()
1221 data->cur_trans->rx_buf = save_rx_buf; in pch_spi_process_messages()
1226 kfree(data->pkt_rx_buff); in pch_spi_process_messages()
1227 data->pkt_rx_buff = NULL; in pch_spi_process_messages()
1228 kfree(data->pkt_tx_buff); in pch_spi_process_messages()
1229 data->pkt_tx_buff = NULL; in pch_spi_process_messages()
1232 data->cur_trans->len = data->save_total_len; in pch_spi_process_messages()
1233 data->current_msg->actual_length += data->cur_trans->len; in pch_spi_process_messages()
1235 dev_dbg(&data->master->dev, in pch_spi_process_messages()
1236 "%s:data->current_msg->actual_length=%d\n", in pch_spi_process_messages()
1237 __func__, data->current_msg->actual_length); in pch_spi_process_messages()
1239 spi_transfer_delay_exec(data->cur_trans); in pch_spi_process_messages()
1241 spin_lock(&data->lock); in pch_spi_process_messages()
1243 /* No more transfer in this message. */ in pch_spi_process_messages()
1244 if ((data->cur_trans->transfer_list.next) == in pch_spi_process_messages()
1245 &(data->current_msg->transfers)) { in pch_spi_process_messages()
1249 spin_unlock(&data->lock); in pch_spi_process_messages()
1251 } while (data->cur_trans != NULL); in pch_spi_process_messages()
1254 pch_spi_writereg(data->master, PCH_SSNXCR, SSN_HIGH); in pch_spi_process_messages()
1255 if (data->use_dma) in pch_spi_process_messages()
1262 dev_dbg(&board_dat->pdev->dev, "%s ENTRY\n", __func__); in pch_spi_free_resources()
1264 flush_work(&data->work); in pch_spi_free_resources()
1270 dev_dbg(&board_dat->pdev->dev, "%s ENTRY\n", __func__); in pch_spi_get_resources()
1273 pch_spi_reset(data->master); in pch_spi_get_resources()
1274 dev_dbg(&board_dat->pdev->dev, in pch_spi_get_resources()
1277 dev_dbg(&board_dat->pdev->dev, "%s data->irq_reg_sts=true\n", __func__); in pch_spi_get_resources()
1287 dma = &data->dma; in pch_free_dma_buf()
1288 if (dma->tx_buf_dma) in pch_free_dma_buf()
1289 dma_free_coherent(&board_dat->pdev->dev, PCH_BUF_SIZE, in pch_free_dma_buf()
1290 dma->tx_buf_virt, dma->tx_buf_dma); in pch_free_dma_buf()
1291 if (dma->rx_buf_dma) in pch_free_dma_buf()
1292 dma_free_coherent(&board_dat->pdev->dev, PCH_BUF_SIZE, in pch_free_dma_buf()
1293 dma->rx_buf_virt, dma->rx_buf_dma); in pch_free_dma_buf()
1302 dma = &data->dma; in pch_alloc_dma_buf()
1305 dma->tx_buf_virt = dma_alloc_coherent(&board_dat->pdev->dev, in pch_alloc_dma_buf()
1306 PCH_BUF_SIZE, &dma->tx_buf_dma, GFP_KERNEL); in pch_alloc_dma_buf()
1307 if (!dma->tx_buf_virt) in pch_alloc_dma_buf()
1308 ret = -ENOMEM; in pch_alloc_dma_buf()
1311 dma->rx_buf_virt = dma_alloc_coherent(&board_dat->pdev->dev, in pch_alloc_dma_buf()
1312 PCH_BUF_SIZE, &dma->rx_buf_dma, GFP_KERNEL); in pch_alloc_dma_buf()
1313 if (!dma->rx_buf_virt) in pch_alloc_dma_buf()
1314 ret = -ENOMEM; in pch_alloc_dma_buf()
1323 struct pch_spi_board_data *board_dat = dev_get_platdata(&plat_dev->dev); in pch_spi_pd_probe()
1326 dev_dbg(&plat_dev->dev, "%s:debug\n", __func__); in pch_spi_pd_probe()
1328 master = spi_alloc_master(&board_dat->pdev->dev, in pch_spi_pd_probe()
1331 dev_err(&plat_dev->dev, "spi_alloc_master[%d] failed.\n", in pch_spi_pd_probe()
1332 plat_dev->id); in pch_spi_pd_probe()
1333 return -ENOMEM; in pch_spi_pd_probe()
1337 data->master = master; in pch_spi_pd_probe()
1342 data->io_base_addr = pci_resource_start(board_dat->pdev, 1) + in pch_spi_pd_probe()
1343 PCH_ADDRESS_SIZE * plat_dev->id; in pch_spi_pd_probe()
1344 data->io_remap_addr = pci_iomap(board_dat->pdev, 1, 0); in pch_spi_pd_probe()
1345 if (!data->io_remap_addr) { in pch_spi_pd_probe()
1346 dev_err(&plat_dev->dev, "%s pci_iomap failed\n", __func__); in pch_spi_pd_probe()
1347 ret = -ENOMEM; in pch_spi_pd_probe()
1350 data->io_remap_addr += PCH_ADDRESS_SIZE * plat_dev->id; in pch_spi_pd_probe()
1352 dev_dbg(&plat_dev->dev, "[ch%d] remap_addr=%p\n", in pch_spi_pd_probe()
1353 plat_dev->id, data->io_remap_addr); in pch_spi_pd_probe()
1356 master->num_chipselect = PCH_MAX_CS; in pch_spi_pd_probe()
1357 master->transfer = pch_spi_transfer; in pch_spi_pd_probe()
1358 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST; in pch_spi_pd_probe()
1359 master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16); in pch_spi_pd_probe()
1360 master->max_speed_hz = PCH_MAX_BAUDRATE; in pch_spi_pd_probe()
1362 data->board_dat = board_dat; in pch_spi_pd_probe()
1363 data->plat_dev = plat_dev; in pch_spi_pd_probe()
1364 data->n_curnt_chip = 255; in pch_spi_pd_probe()
1365 data->status = STATUS_RUNNING; in pch_spi_pd_probe()
1366 data->ch = plat_dev->id; in pch_spi_pd_probe()
1367 data->use_dma = use_dma; in pch_spi_pd_probe()
1369 INIT_LIST_HEAD(&data->queue); in pch_spi_pd_probe()
1370 spin_lock_init(&data->lock); in pch_spi_pd_probe()
1371 INIT_WORK(&data->work, pch_spi_process_messages); in pch_spi_pd_probe()
1372 init_waitqueue_head(&data->wait); in pch_spi_pd_probe()
1376 dev_err(&plat_dev->dev, "%s fail(retval=%d)\n", __func__, ret); in pch_spi_pd_probe()
1380 ret = request_irq(board_dat->pdev->irq, pch_spi_handler, in pch_spi_pd_probe()
1383 dev_err(&plat_dev->dev, in pch_spi_pd_probe()
1387 data->irq_reg_sts = true; in pch_spi_pd_probe()
1392 dev_info(&plat_dev->dev, "Use DMA for data transfers\n"); in pch_spi_pd_probe()
1400 dev_err(&plat_dev->dev, in pch_spi_pd_probe()
1409 free_irq(board_dat->pdev->irq, data); in pch_spi_pd_probe()
1413 pci_iounmap(board_dat->pdev, data->io_remap_addr); in pch_spi_pd_probe()
1422 struct pch_spi_board_data *board_dat = dev_get_platdata(&plat_dev->dev); in pch_spi_pd_remove()
1427 dev_dbg(&plat_dev->dev, "%s:[ch%d] irq=%d\n", in pch_spi_pd_remove()
1428 __func__, plat_dev->id, board_dat->pdev->irq); in pch_spi_pd_remove()
1436 spin_lock_irqsave(&data->lock, flags); in pch_spi_pd_remove()
1437 data->status = STATUS_EXITING; in pch_spi_pd_remove()
1438 while ((list_empty(&data->queue) == 0) && --count) { in pch_spi_pd_remove()
1439 dev_dbg(&board_dat->pdev->dev, "%s :queue not empty\n", in pch_spi_pd_remove()
1441 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_pd_remove()
1443 spin_lock_irqsave(&data->lock, flags); in pch_spi_pd_remove()
1445 spin_unlock_irqrestore(&data->lock, flags); in pch_spi_pd_remove()
1449 if (data->irq_reg_sts) { in pch_spi_pd_remove()
1451 pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL); in pch_spi_pd_remove()
1452 data->irq_reg_sts = false; in pch_spi_pd_remove()
1453 free_irq(board_dat->pdev->irq, data); in pch_spi_pd_remove()
1456 pci_iounmap(board_dat->pdev, data->io_remap_addr); in pch_spi_pd_remove()
1457 spi_unregister_master(data->master); in pch_spi_pd_remove()
1466 struct pch_spi_board_data *board_dat = dev_get_platdata(&pd_dev->dev); in pch_spi_pd_suspend()
1469 dev_dbg(&pd_dev->dev, "%s ENTRY\n", __func__); in pch_spi_pd_suspend()
1472 dev_err(&pd_dev->dev, in pch_spi_pd_suspend()
1474 return -EFAULT; in pch_spi_pd_suspend()
1478 Only after thats done the transfer will be suspended */ in pch_spi_pd_suspend()
1480 while ((--count) > 0) { in pch_spi_pd_suspend()
1481 if (!(data->bcurrent_msg_processing)) in pch_spi_pd_suspend()
1487 if (data->irq_reg_sts) { in pch_spi_pd_suspend()
1489 pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL); in pch_spi_pd_suspend()
1490 pch_spi_reset(data->master); in pch_spi_pd_suspend()
1491 free_irq(board_dat->pdev->irq, data); in pch_spi_pd_suspend()
1493 data->irq_reg_sts = false; in pch_spi_pd_suspend()
1494 dev_dbg(&pd_dev->dev, in pch_spi_pd_suspend()
1503 struct pch_spi_board_data *board_dat = dev_get_platdata(&pd_dev->dev); in pch_spi_pd_resume()
1508 dev_err(&pd_dev->dev, in pch_spi_pd_resume()
1510 return -EFAULT; in pch_spi_pd_resume()
1513 if (!data->irq_reg_sts) { in pch_spi_pd_resume()
1515 retval = request_irq(board_dat->pdev->irq, pch_spi_handler, in pch_spi_pd_resume()
1518 dev_err(&pd_dev->dev, in pch_spi_pd_resume()
1524 pch_spi_reset(data->master); in pch_spi_pd_resume()
1525 pch_spi_set_master_mode(data->master); in pch_spi_pd_resume()
1526 data->irq_reg_sts = true; in pch_spi_pd_resume()
1537 .name = "pch-spi",
1555 return -ENOMEM; in pch_spi_probe()
1559 retval = -ENOMEM; in pch_spi_probe()
1565 dev_err(&pdev->dev, "%s request_region failed\n", __func__); in pch_spi_probe()
1569 board_dat->pdev = pdev; in pch_spi_probe()
1570 board_dat->num = id->driver_data; in pch_spi_probe()
1571 pd_dev_save->num = id->driver_data; in pch_spi_probe()
1572 pd_dev_save->board_dat = board_dat; in pch_spi_probe()
1576 dev_err(&pdev->dev, "%s pci_enable_device failed\n", __func__); in pch_spi_probe()
1580 for (i = 0; i < board_dat->num; i++) { in pch_spi_probe()
1581 pd_dev = platform_device_alloc("pch-spi", i); in pch_spi_probe()
1583 dev_err(&pdev->dev, "platform_device_alloc failed\n"); in pch_spi_probe()
1584 retval = -ENOMEM; in pch_spi_probe()
1587 pd_dev_save->pd_save[i] = pd_dev; in pch_spi_probe()
1588 pd_dev->dev.parent = &pdev->dev; in pch_spi_probe()
1593 dev_err(&pdev->dev, in pch_spi_probe()
1601 dev_err(&pdev->dev, "platform_device_add failed\n"); in pch_spi_probe()
1612 while (--i >= 0) in pch_spi_probe()
1613 platform_device_unregister(pd_dev_save->pd_save[i]); in pch_spi_probe()
1630 dev_dbg(&pdev->dev, "%s ENTRY:pdev=%p\n", __func__, pdev); in pch_spi_remove()
1632 for (i = 0; i < pd_dev_save->num; i++) in pch_spi_remove()
1633 platform_device_unregister(pd_dev_save->pd_save[i]); in pch_spi_remove()
1637 kfree(pd_dev_save->board_dat); in pch_spi_remove()
1647 pd_dev_save->board_dat->suspend_sts = true; in pch_spi_suspend()
1659 pd_dev_save->board_dat->suspend_sts = false; in pch_spi_resume()