313 static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)  in s3c64xx_spi_prepare_transfer()  argument
315 	struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);  in s3c64xx_spi_prepare_transfer()
333 		spi->dma_rx = sdd->rx_dma.ch;  in s3c64xx_spi_prepare_transfer()
342 		spi->dma_tx = sdd->tx_dma.ch;  in s3c64xx_spi_prepare_transfer()
353 static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)  in s3c64xx_spi_unprepare_transfer()  argument
355 	struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);  in s3c64xx_spi_unprepare_transfer()
367 				struct spi_device *spi,  in s3c64xx_spi_can_dma()  argument
376 				struct spi_device *spi,  in enable_datapath()  argument
651 	struct spi_device *spi = msg->spi;  in s3c64xx_spi_prepare_message()  local
652 	struct s3c64xx_spi_csinfo *cs = spi->controller_data;  in s3c64xx_spi_prepare_message()
655 	if (sdd->cur_speed != spi->max_speed_hz  in s3c64xx_spi_prepare_message()
656 			|| sdd->cur_mode != spi->mode  in s3c64xx_spi_prepare_message()
657 			|| sdd->cur_bpw != spi->bits_per_word) {  in s3c64xx_spi_prepare_message()
658 		sdd->cur_bpw = spi->bits_per_word;  in s3c64xx_spi_prepare_message()
659 		sdd->cur_speed = spi->max_speed_hz;  in s3c64xx_spi_prepare_message()
660 		sdd->cur_mode = spi->mode;  in s3c64xx_spi_prepare_message()
671 				    struct spi_device *spi,  in s3c64xx_spi_transfer_one()  argument
685 	speed = xfer->speed_hz ? : spi->max_speed_hz;  in s3c64xx_spi_transfer_one()
706 	enable_datapath(sdd, spi, xfer, use_dma);  in s3c64xx_spi_transfer_one()
724 		dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",  in s3c64xx_spi_transfer_one()
746 				struct spi_device *spi)  in s3c64xx_get_slave_ctrldata()  argument
752 	slave_np = spi->dev.of_node;  in s3c64xx_get_slave_ctrldata()
754 		dev_err(&spi->dev, "device node not found\n");  in s3c64xx_get_slave_ctrldata()
760 		dev_err(&spi->dev, "child node 'controller-data' not found\n");  in s3c64xx_get_slave_ctrldata()
782 static int s3c64xx_spi_setup(struct spi_device *spi)  in s3c64xx_spi_setup()  argument
784 	struct s3c64xx_spi_csinfo *cs = spi->controller_data;  in s3c64xx_spi_setup()
789 	sdd = spi_master_get_devdata(spi->master);  in s3c64xx_spi_setup()
790 	if (spi->dev.of_node) {  in s3c64xx_spi_setup()
791 		cs = s3c64xx_get_slave_ctrldata(spi);  in s3c64xx_spi_setup()
792 		spi->controller_data = cs;  in s3c64xx_spi_setup()
799 		spi->cs_gpio = cs->line;  in s3c64xx_spi_setup()
803 		dev_err(&spi->dev, "No CS for SPI(%d)\n", spi->chip_select);  in s3c64xx_spi_setup()
807 	if (!spi_get_ctldata(spi)) {  in s3c64xx_spi_setup()
808 		if (gpio_is_valid(spi->cs_gpio)) {  in s3c64xx_spi_setup()
809 			err = gpio_request_one(spi->cs_gpio, GPIOF_OUT_INIT_HIGH,  in s3c64xx_spi_setup()
810 					       dev_name(&spi->dev));  in s3c64xx_spi_setup()
812 				dev_err(&spi->dev,  in s3c64xx_spi_setup()
814 					spi->cs_gpio, err);  in s3c64xx_spi_setup()
819 		spi_set_ctldata(spi, cs);  in s3c64xx_spi_setup()
833 		if (spi->max_speed_hz > speed)  in s3c64xx_spi_setup()
834 			spi->max_speed_hz = speed;  in s3c64xx_spi_setup()
836 		psr = clk_get_rate(sdd->src_clk) / 2 / spi->max_speed_hz - 1;  in s3c64xx_spi_setup()
842 		if (spi->max_speed_hz < speed) {  in s3c64xx_spi_setup()
852 		if (spi->max_speed_hz >= speed) {  in s3c64xx_spi_setup()
853 			spi->max_speed_hz = speed;  in s3c64xx_spi_setup()
855 			dev_err(&spi->dev, "Can't set %dHz transfer speed\n",  in s3c64xx_spi_setup()
856 				spi->max_speed_hz);  in s3c64xx_spi_setup()
873 	if (gpio_is_valid(spi->cs_gpio))  in s3c64xx_spi_setup()
874 		gpio_free(spi->cs_gpio);  in s3c64xx_spi_setup()
875 	spi_set_ctldata(spi, NULL);  in s3c64xx_spi_setup()
878 	if (spi->dev.of_node)  in s3c64xx_spi_setup()
884 static void s3c64xx_spi_cleanup(struct spi_device *spi)  in s3c64xx_spi_cleanup()  argument
886 	struct s3c64xx_spi_csinfo *cs = spi_get_ctldata(spi);  in s3c64xx_spi_cleanup()
888 	if (gpio_is_valid(spi->cs_gpio)) {  in s3c64xx_spi_cleanup()
889 		gpio_free(spi->cs_gpio);  in s3c64xx_spi_cleanup()
890 		if (spi->dev.of_node)  in s3c64xx_spi_cleanup()
898 			spi->cs_gpio = -ENOENT;  in s3c64xx_spi_cleanup()
902 	spi_set_ctldata(spi, NULL);  in s3c64xx_spi_cleanup()
908 	struct spi_master *spi = sdd->master;  in s3c64xx_spi_irq()  local
915 		dev_err(&spi->dev, "RX overrun\n");  in s3c64xx_spi_irq()
919 		dev_err(&spi->dev, "RX underrun\n");  in s3c64xx_spi_irq()
923 		dev_err(&spi->dev, "TX overrun\n");  in s3c64xx_spi_irq()
927 		dev_err(&spi->dev, "TX underrun\n");  in s3c64xx_spi_irq()