drivers/spi/spi-imx.c

93 	struct spi_controller *controller;
233 static bool spi_imx_can_dma(struct spi_controller *controller, struct spi_device *spi,
236 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(controller);
238 	if (!use_dma || controller->fallback)
241 	if (!controller->dma_rx)
524 	return spi->controller->unused_native_cs;
1209 static int spi_imx_dma_configure(struct spi_controller *controller)
1214 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(controller);
1234 	ret = dmaengine_slave_config(controller->dma_tx, &tx);
1244 	ret = dmaengine_slave_config(controller->dma_rx, &rx);
1256 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(spi->controller);
1303 	if (spi_imx_can_dma(spi_imx->controller, spi, t))
1309 			|| (t->tx_buf == spi->controller->dummy_tx));
1324 	struct spi_controller *controller = spi_imx->controller;
1326 	if (controller->dma_rx) {
1327 		dma_release_channel(controller->dma_rx);
1328 		controller->dma_rx = NULL;
1331 	if (controller->dma_tx) {
1332 		dma_release_channel(controller->dma_tx);
1333 		controller->dma_tx = NULL;
1338 			     struct spi_controller *controller)
1345 	controller->dma_tx = dma_request_chan(dev, "tx");
1346 	if (IS_ERR(controller->dma_tx)) {
1347 		ret = PTR_ERR(controller->dma_tx);
1349 		controller->dma_tx = NULL;
1354 	controller->dma_rx = dma_request_chan(dev, "rx");
1355 	if (IS_ERR(controller->dma_rx)) {
1356 		ret = PTR_ERR(controller->dma_rx);
1358 		controller->dma_rx = NULL;
1364 	controller->can_dma = spi_imx_can_dma;
1365 	controller->max_dma_len = MAX_SDMA_BD_BYTES;
1366 	spi_imx->controller->flags = SPI_CONTROLLER_MUST_RX |
1409 	struct spi_controller *controller = spi_imx->controller;
1427 	ret = spi_imx_dma_configure(controller);
1442 	desc_rx = dmaengine_prep_slave_sg(controller->dma_rx,
1454 	dma_async_issue_pending(controller->dma_rx);
1456 	desc_tx = dmaengine_prep_slave_sg(controller->dma_tx,
1460 		dmaengine_terminate_all(controller->dma_tx);
1461 		dmaengine_terminate_all(controller->dma_rx);
1469 	dma_async_issue_pending(controller->dma_tx);
1478 		dmaengine_terminate_all(controller->dma_tx);
1479 		dmaengine_terminate_all(controller->dma_rx);
1486 		dev_err(&controller->dev, "I/O Error in DMA RX\n");
1488 		dmaengine_terminate_all(controller->dma_rx);
1502 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(spi->controller);
1534 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(spi->controller);
1582 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(spi->controller);
1623 static int spi_imx_transfer_one(struct spi_controller *controller,
1627 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(spi->controller);
1674 spi_imx_prepare_message(struct spi_controller *controller, struct spi_message *msg)
1676 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(controller);
1695 spi_imx_unprepare_message(struct spi_controller *controller, struct spi_message *msg)
1697 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(controller);
1704 static int spi_imx_target_abort(struct spi_controller *controller)
1706 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(controller);
1717 	struct spi_controller *controller;
1729 		controller = spi_alloc_target(&pdev->dev,
1732 		controller = spi_alloc_host(&pdev->dev,
1734 	if (!controller)
1743 	platform_set_drvdata(pdev, controller);
1745 	controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
1746 	controller->bus_num = np ? -1 : pdev->id;
1747 	controller->use_gpio_descriptors = true;
1749 	spi_imx = spi_controller_get_devdata(controller);
1750 	spi_imx->controller = controller;
1763 		controller->num_chipselect = val;
1765 		controller->num_chipselect = 3;
1767 	controller->transfer_one = spi_imx_transfer_one;
1768 	controller->setup = spi_imx_setup;
1769 	controller->cleanup = spi_imx_cleanup;
1770 	controller->prepare_message = spi_imx_prepare_message;
1771 	controller->unprepare_message = spi_imx_unprepare_message;
1772 	controller->target_abort = spi_imx_target_abort;
1773 	controller->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_NO_CS |
1778 		controller->mode_bits |= SPI_LOOP | SPI_READY;
1781 		controller->mode_bits |= SPI_RX_CPHA_FLIP;
1790 		controller->mode_bits |= SPI_CS_WORD;
1793 		controller->max_native_cs = 4;
1794 		controller->flags |= SPI_CONTROLLER_GPIO_SS;
1853 		ret = spi_imx_sdma_init(&pdev->dev, spi_imx, controller);
1866 	controller->dev.of_node = pdev->dev.of_node;
1867 	ret = spi_register_controller(controller);
1869 		dev_err_probe(&pdev->dev, ret, "register controller failed\n");
1890 	spi_controller_put(controller);
1897 	struct spi_controller *controller = platform_get_drvdata(pdev);
1898 	struct spi_imx_data *spi_imx = spi_controller_get_devdata(controller);
1901 	spi_unregister_controller(controller);
1918 	struct spi_controller *controller = dev_get_drvdata(dev);
1922 	spi_imx = spi_controller_get_devdata(controller);
1939 	struct spi_controller *controller = dev_get_drvdata(dev);
1942 	spi_imx = spi_controller_get_devdata(controller);