129 static inline u32 cdns_spi_read(struct cdns_spi *xspi, u32 offset)  in cdns_spi_read()  argument
131 	return readl_relaxed(xspi->regs + offset);  in cdns_spi_read()
134 static inline void cdns_spi_write(struct cdns_spi *xspi, u32 offset, u32 val)  in cdns_spi_write()  argument
136 	writel_relaxed(val, xspi->regs + offset);  in cdns_spi_write()
141  * @xspi:	Pointer to the cdns_spi structure
150 static void cdns_spi_init_hw(struct cdns_spi *xspi)  in cdns_spi_init_hw()  argument
154 	if (xspi->is_decoded_cs)  in cdns_spi_init_hw()
157 	cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_DISABLE);  in cdns_spi_init_hw()
158 	cdns_spi_write(xspi, CDNS_SPI_IDR, CDNS_SPI_IXR_ALL);  in cdns_spi_init_hw()
161 	while (cdns_spi_read(xspi, CDNS_SPI_ISR) & CDNS_SPI_IXR_RXNEMTY)  in cdns_spi_init_hw()
162 		cdns_spi_read(xspi, CDNS_SPI_RXD);  in cdns_spi_init_hw()
164 	cdns_spi_write(xspi, CDNS_SPI_ISR, CDNS_SPI_IXR_ALL);  in cdns_spi_init_hw()
165 	cdns_spi_write(xspi, CDNS_SPI_CR, ctrl_reg);  in cdns_spi_init_hw()
166 	cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_ENABLE);  in cdns_spi_init_hw()
176 	struct cdns_spi *xspi = spi_master_get_devdata(spi->master);  in cdns_spi_chipselect()  local
179 	ctrl_reg = cdns_spi_read(xspi, CDNS_SPI_CR);  in cdns_spi_chipselect()
187 		if (!(xspi->is_decoded_cs))  in cdns_spi_chipselect()
196 	cdns_spi_write(xspi, CDNS_SPI_CR, ctrl_reg);  in cdns_spi_chipselect()
207 	struct cdns_spi *xspi = spi_master_get_devdata(spi->master);  in cdns_spi_config_clock_mode()  local
210 	new_ctrl_reg = cdns_spi_read(xspi, CDNS_SPI_CR);  in cdns_spi_config_clock_mode()
227 		cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_DISABLE);  in cdns_spi_config_clock_mode()
228 		cdns_spi_write(xspi, CDNS_SPI_CR, new_ctrl_reg);  in cdns_spi_config_clock_mode()
229 		cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_ENABLE);  in cdns_spi_config_clock_mode()
250 	struct cdns_spi *xspi = spi_master_get_devdata(spi->master);  in cdns_spi_config_clock_freq()  local
254 	frequency = xspi->clk_rate;  in cdns_spi_config_clock_freq()
256 	ctrl_reg = cdns_spi_read(xspi, CDNS_SPI_CR);  in cdns_spi_config_clock_freq()
259 	if (xspi->speed_hz != transfer->speed_hz) {  in cdns_spi_config_clock_freq()
269 		xspi->speed_hz = frequency / (2 << baud_rate_val);  in cdns_spi_config_clock_freq()
271 	cdns_spi_write(xspi, CDNS_SPI_CR, ctrl_reg);  in cdns_spi_config_clock_freq()
288 	struct cdns_spi *xspi = spi_master_get_devdata(spi->master);  in cdns_spi_setup_transfer()  local
294 		xspi->speed_hz);  in cdns_spi_setup_transfer()
301  * @xspi:	Pointer to the cdns_spi structure
303 static void cdns_spi_fill_tx_fifo(struct cdns_spi *xspi)  in cdns_spi_fill_tx_fifo()  argument
308 	       (xspi->tx_bytes > 0)) {  in cdns_spi_fill_tx_fifo()
310 		/* When xspi in busy condition, bytes may send failed,  in cdns_spi_fill_tx_fifo()
313 		if (cdns_spi_read(xspi, CDNS_SPI_ISR) &  in cdns_spi_fill_tx_fifo()
317 		if (xspi->txbuf)  in cdns_spi_fill_tx_fifo()
318 			cdns_spi_write(xspi, CDNS_SPI_TXD, *xspi->txbuf++);  in cdns_spi_fill_tx_fifo()
320 			cdns_spi_write(xspi, CDNS_SPI_TXD, 0);  in cdns_spi_fill_tx_fifo()
322 		xspi->tx_bytes--;  in cdns_spi_fill_tx_fifo()
330  * @dev_id:	Pointer to the xspi structure
344 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cdns_spi_irq()  local
348 	intr_status = cdns_spi_read(xspi, CDNS_SPI_ISR);  in cdns_spi_irq()
349 	cdns_spi_write(xspi, CDNS_SPI_ISR, intr_status);  in cdns_spi_irq()
356 		cdns_spi_write(xspi, CDNS_SPI_IDR, CDNS_SPI_IXR_DEFAULT);  in cdns_spi_irq()
362 		trans_cnt = xspi->rx_bytes - xspi->tx_bytes;  in cdns_spi_irq()
368 			data = cdns_spi_read(xspi, CDNS_SPI_RXD);  in cdns_spi_irq()
369 			if (xspi->rxbuf)  in cdns_spi_irq()
370 				*xspi->rxbuf++ = data;  in cdns_spi_irq()
372 			xspi->rx_bytes--;  in cdns_spi_irq()
376 		if (xspi->tx_bytes) {  in cdns_spi_irq()
378 			cdns_spi_fill_tx_fifo(xspi);  in cdns_spi_irq()
381 			cdns_spi_write(xspi, CDNS_SPI_IDR,  in cdns_spi_irq()
414 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cdns_transfer_one()  local
416 	xspi->txbuf = transfer->tx_buf;  in cdns_transfer_one()
417 	xspi->rxbuf = transfer->rx_buf;  in cdns_transfer_one()
418 	xspi->tx_bytes = transfer->len;  in cdns_transfer_one()
419 	xspi->rx_bytes = transfer->len;  in cdns_transfer_one()
422 	cdns_spi_fill_tx_fifo(xspi);  in cdns_transfer_one()
425 	cdns_spi_write(xspi, CDNS_SPI_IER, CDNS_SPI_IXR_DEFAULT);  in cdns_transfer_one()
440 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cdns_prepare_transfer_hardware()  local
442 	cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_ENABLE);  in cdns_prepare_transfer_hardware()
458 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cdns_unprepare_transfer_hardware()  local
460 	cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_DISABLE);  in cdns_unprepare_transfer_hardware()
477 	struct cdns_spi *xspi;  in cdns_spi_probe()  local
480 	master = spi_alloc_master(&pdev->dev, sizeof(*xspi));  in cdns_spi_probe()
484 	xspi = spi_master_get_devdata(master);  in cdns_spi_probe()
488 	xspi->regs = devm_platform_ioremap_resource(pdev, 0);  in cdns_spi_probe()
489 	if (IS_ERR(xspi->regs)) {  in cdns_spi_probe()
490 		ret = PTR_ERR(xspi->regs);  in cdns_spi_probe()
494 	xspi->pclk = devm_clk_get(&pdev->dev, "pclk");  in cdns_spi_probe()
495 	if (IS_ERR(xspi->pclk)) {  in cdns_spi_probe()
497 		ret = PTR_ERR(xspi->pclk);  in cdns_spi_probe()
501 	xspi->ref_clk = devm_clk_get(&pdev->dev, "ref_clk");  in cdns_spi_probe()
502 	if (IS_ERR(xspi->ref_clk)) {  in cdns_spi_probe()
504 		ret = PTR_ERR(xspi->ref_clk);  in cdns_spi_probe()
508 	ret = clk_prepare_enable(xspi->pclk);  in cdns_spi_probe()
514 	ret = clk_prepare_enable(xspi->ref_clk);  in cdns_spi_probe()
533 				   &xspi->is_decoded_cs);  in cdns_spi_probe()
535 		xspi->is_decoded_cs = 0;  in cdns_spi_probe()
538 	cdns_spi_init_hw(xspi);  in cdns_spi_probe()
563 	xspi->clk_rate = clk_get_rate(xspi->ref_clk);  in cdns_spi_probe()
565 	master->max_speed_hz = xspi->clk_rate / 4;  in cdns_spi_probe()
566 	xspi->speed_hz = master->max_speed_hz;  in cdns_spi_probe()
584 	clk_disable_unprepare(xspi->ref_clk);  in cdns_spi_probe()
586 	clk_disable_unprepare(xspi->pclk);  in cdns_spi_probe()
605 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cdns_spi_remove()  local
607 	cdns_spi_write(xspi, CDNS_SPI_ER, CDNS_SPI_ER_DISABLE);  in cdns_spi_remove()
609 	clk_disable_unprepare(xspi->ref_clk);  in cdns_spi_remove()
610 	clk_disable_unprepare(xspi->pclk);  in cdns_spi_remove()
646 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cdns_spi_resume()  local
648 	cdns_spi_init_hw(xspi);  in cdns_spi_resume()
663 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cnds_runtime_resume()  local
666 	ret = clk_prepare_enable(xspi->pclk);  in cnds_runtime_resume()
672 	ret = clk_prepare_enable(xspi->ref_clk);  in cnds_runtime_resume()
675 		clk_disable_unprepare(xspi->pclk);  in cnds_runtime_resume()
692 	struct cdns_spi *xspi = spi_master_get_devdata(master);  in cnds_runtime_suspend()  local
694 	clk_disable_unprepare(xspi->ref_clk);  in cnds_runtime_suspend()
695 	clk_disable_unprepare(xspi->pclk);  in cnds_runtime_suspend()