58 #define CTRL_MSTEN	BIT(5) /* enable master mode */
103 	struct spi_master	*master;  member
227 	dev_err(&pic32s->master->dev, "%s\n", msg);  in pic32_err_stop()
228 	if (pic32s->master->cur_msg)  in pic32_err_stop()
229 		pic32s->master->cur_msg->status = -EIO;  in pic32_err_stop()
253 	if (!pic32s->master->cur_msg) {  in pic32_spi_fault_irq()
303 	struct spi_master *master = pic32s->master;  in pic32_spi_dma_transfer()  local
309 	if (!master->dma_rx || !master->dma_tx)  in pic32_spi_dma_transfer()
312 	desc_rx = dmaengine_prep_slave_sg(master->dma_rx,  in pic32_spi_dma_transfer()
322 	desc_tx = dmaengine_prep_slave_sg(master->dma_tx,  in pic32_spi_dma_transfer()
346 	dma_async_issue_pending(master->dma_rx);  in pic32_spi_dma_transfer()
347 	dma_async_issue_pending(master->dma_tx);  in pic32_spi_dma_transfer()
352 	dmaengine_terminate_all(master->dma_rx);  in pic32_spi_dma_transfer()
360 	struct spi_master *master = pic32s->master;  in pic32_spi_dma_config()  local
375 	ret = dmaengine_slave_config(master->dma_tx, &cfg);  in pic32_spi_dma_config()
377 		dev_err(&master->dev, "tx channel setup failed\n");  in pic32_spi_dma_config()
383 	ret = dmaengine_slave_config(master->dma_rx, &cfg);  in pic32_spi_dma_config()
385 		dev_err(&master->dev, "rx channel setup failed\n");  in pic32_spi_dma_config()
435 static int pic32_spi_prepare_hardware(struct spi_master *master)  in pic32_spi_prepare_hardware()  argument
437 	struct pic32_spi *pic32s = spi_master_get_devdata(master);  in pic32_spi_prepare_hardware()
444 static int pic32_spi_prepare_message(struct spi_master *master,  in pic32_spi_prepare_message()  argument
447 	struct pic32_spi *pic32s = spi_master_get_devdata(master);  in pic32_spi_prepare_message()
486 static bool pic32_spi_can_dma(struct spi_master *master,  in pic32_spi_can_dma()  argument
490 	struct pic32_spi *pic32s = spi_master_get_devdata(master);  in pic32_spi_can_dma()
497 static int pic32_spi_one_transfer(struct spi_master *master,  in pic32_spi_one_transfer()  argument
506 	pic32s = spi_master_get_devdata(master);  in pic32_spi_one_transfer()
554 			dmaengine_terminate_all(master->dma_rx);  in pic32_spi_one_transfer()
555 			dmaengine_terminate_all(master->dma_tx);  in pic32_spi_one_transfer()
565 static int pic32_spi_unprepare_message(struct spi_master *master,  in pic32_spi_unprepare_message()  argument
572 static int pic32_spi_unprepare_hardware(struct spi_master *master)  in pic32_spi_unprepare_hardware()  argument
574 	struct pic32_spi *pic32s = spi_master_get_devdata(master);  in pic32_spi_unprepare_hardware()
612 	struct spi_master *master = pic32s->master;  in pic32_spi_dma_prep()  local
615 	master->dma_rx = dma_request_chan(dev, "spi-rx");  in pic32_spi_dma_prep()
616 	if (IS_ERR(master->dma_rx)) {  in pic32_spi_dma_prep()
617 		if (PTR_ERR(master->dma_rx) == -EPROBE_DEFER)  in pic32_spi_dma_prep()
622 		master->dma_rx = NULL;  in pic32_spi_dma_prep()
626 	master->dma_tx = dma_request_chan(dev, "spi-tx");  in pic32_spi_dma_prep()
627 	if (IS_ERR(master->dma_tx)) {  in pic32_spi_dma_prep()
628 		if (PTR_ERR(master->dma_tx) == -EPROBE_DEFER)  in pic32_spi_dma_prep()
633 		master->dma_tx = NULL;  in pic32_spi_dma_prep()
646 	if (master->dma_rx) {  in pic32_spi_dma_prep()
647 		dma_release_channel(master->dma_rx);  in pic32_spi_dma_prep()
648 		master->dma_rx = NULL;  in pic32_spi_dma_prep()
651 	if (master->dma_tx) {  in pic32_spi_dma_prep()
652 		dma_release_channel(master->dma_tx);  in pic32_spi_dma_prep()
653 		master->dma_tx = NULL;  in pic32_spi_dma_prep()
665 	if (pic32s->master->dma_rx)  in pic32_spi_dma_unprep()
666 		dma_release_channel(pic32s->master->dma_rx);  in pic32_spi_dma_unprep()
668 	if (pic32s->master->dma_tx)  in pic32_spi_dma_unprep()
669 		dma_release_channel(pic32s->master->dma_tx);  in pic32_spi_dma_unprep()
687 	/* enable master mode while disabled */  in pic32_spi_hw_init()
760 	struct spi_master *master;  in pic32_spi_probe()  local
764 	master = spi_alloc_master(&pdev->dev, sizeof(*pic32s));  in pic32_spi_probe()
765 	if (!master)  in pic32_spi_probe()
768 	pic32s = spi_master_get_devdata(master);  in pic32_spi_probe()
769 	pic32s->master = master;  in pic32_spi_probe()
775 	master->dev.of_node	= pdev->dev.of_node;  in pic32_spi_probe()
776 	master->mode_bits	= SPI_MODE_3 | SPI_MODE_0 | SPI_CS_HIGH;  in pic32_spi_probe()
777 	master->num_chipselect	= 1; /* single chip-select */  in pic32_spi_probe()
778 	master->max_speed_hz	= clk_get_rate(pic32s->clk);  in pic32_spi_probe()
779 	master->setup		= pic32_spi_setup;  in pic32_spi_probe()
780 	master->cleanup		= pic32_spi_cleanup;  in pic32_spi_probe()
781 	master->flags		= SPI_MASTER_MUST_TX | SPI_MASTER_MUST_RX;  in pic32_spi_probe()
782 	master->bits_per_word_mask	= SPI_BPW_MASK(8) | SPI_BPW_MASK(16) |  in pic32_spi_probe()
784 	master->transfer_one		= pic32_spi_one_transfer;  in pic32_spi_probe()
785 	master->prepare_message		= pic32_spi_prepare_message;  in pic32_spi_probe()
786 	master->unprepare_message	= pic32_spi_unprepare_message;  in pic32_spi_probe()
787 	master->prepare_transfer_hardware	= pic32_spi_prepare_hardware;  in pic32_spi_probe()
788 	master->unprepare_transfer_hardware	= pic32_spi_unprepare_hardware;  in pic32_spi_probe()
796 		master->can_dma	= pic32_spi_can_dma;  in pic32_spi_probe()
831 	/* register master */  in pic32_spi_probe()
832 	ret = devm_spi_register_master(&pdev->dev, master);  in pic32_spi_probe()
834 		dev_err(&master->dev, "failed registering spi master\n");  in pic32_spi_probe()
846 	spi_master_put(master);  in pic32_spi_probe()