161 static int hisi_spi_debugfs_init(struct hisi_spi *hs)  in hisi_spi_debugfs_init()  argument
167 	host = container_of(hs->dev, struct spi_controller, dev);  in hisi_spi_debugfs_init()
169 	hs->debugfs = debugfs_create_dir(name, NULL);  in hisi_spi_debugfs_init()
170 	if (IS_ERR(hs->debugfs))  in hisi_spi_debugfs_init()
173 	hs->regset.regs = hisi_spi_regs;  in hisi_spi_debugfs_init()
174 	hs->regset.nregs = ARRAY_SIZE(hisi_spi_regs);  in hisi_spi_debugfs_init()
175 	hs->regset.base = hs->regs;  in hisi_spi_debugfs_init()
176 	debugfs_create_regset32("registers", 0400, hs->debugfs, &hs->regset);  in hisi_spi_debugfs_init()
181 static u32 hisi_spi_busy(struct hisi_spi *hs)  in hisi_spi_busy()  argument
183 	return readl(hs->regs + HISI_SPI_SR) & SR_BUSY;  in hisi_spi_busy()
186 static u32 hisi_spi_rx_not_empty(struct hisi_spi *hs)  in hisi_spi_rx_not_empty()  argument
188 	return readl(hs->regs + HISI_SPI_SR) & SR_RXNE;  in hisi_spi_rx_not_empty()
191 static u32 hisi_spi_tx_not_full(struct hisi_spi *hs)  in hisi_spi_tx_not_full()  argument
193 	return readl(hs->regs + HISI_SPI_SR) & SR_TXNF;  in hisi_spi_tx_not_full()
196 static void hisi_spi_flush_fifo(struct hisi_spi *hs)  in hisi_spi_flush_fifo()  argument
201 		while (hisi_spi_rx_not_empty(hs))  in hisi_spi_flush_fifo()
202 			readl(hs->regs + HISI_SPI_DOUT);  in hisi_spi_flush_fifo()
203 	} while (hisi_spi_busy(hs) && limit--);  in hisi_spi_flush_fifo()
207 static void hisi_spi_disable(struct hisi_spi *hs)  in hisi_spi_disable()  argument
209 	writel(0, hs->regs + HISI_SPI_ENR);  in hisi_spi_disable()
210 	writel(IMR_MASK, hs->regs + HISI_SPI_IMR);  in hisi_spi_disable()
211 	writel(ICR_MASK, hs->regs + HISI_SPI_ICR);  in hisi_spi_disable()
224 static void hisi_spi_reader(struct hisi_spi *hs)  in hisi_spi_reader()  argument
226 	u32 max = min_t(u32, hs->rx_len, hs->fifo_len);  in hisi_spi_reader()
229 	while (hisi_spi_rx_not_empty(hs) && max--) {  in hisi_spi_reader()
230 		rxw = readl(hs->regs + HISI_SPI_DOUT);  in hisi_spi_reader()
232 		if (hs->rx) {  in hisi_spi_reader()
233 			switch (hs->n_bytes) {  in hisi_spi_reader()
235 				*(u8 *)(hs->rx) = rxw;  in hisi_spi_reader()
238 				*(u16 *)(hs->rx) = rxw;  in hisi_spi_reader()
241 				*(u32 *)(hs->rx) = rxw;  in hisi_spi_reader()
244 			hs->rx += hs->n_bytes;  in hisi_spi_reader()
246 		--hs->rx_len;  in hisi_spi_reader()
250 static void hisi_spi_writer(struct hisi_spi *hs)  in hisi_spi_writer()  argument
252 	u32 max = min_t(u32, hs->tx_len, hs->fifo_len);  in hisi_spi_writer()
255 	while (hisi_spi_tx_not_full(hs) && max--) {  in hisi_spi_writer()
257 		if (hs->tx) {  in hisi_spi_writer()
258 			switch (hs->n_bytes) {  in hisi_spi_writer()
260 				txw = *(u8 *)(hs->tx);  in hisi_spi_writer()
263 				txw = *(u16 *)(hs->tx);  in hisi_spi_writer()
266 				txw = *(u32 *)(hs->tx);  in hisi_spi_writer()
269 			hs->tx += hs->n_bytes;  in hisi_spi_writer()
271 		writel(txw, hs->regs + HISI_SPI_DIN);  in hisi_spi_writer()
272 		--hs->tx_len;  in hisi_spi_writer()
323 static void hisi_spi_hw_init(struct hisi_spi *hs)  in hisi_spi_hw_init()  argument
325 	hisi_spi_disable(hs);  in hisi_spi_hw_init()
330 		hs->regs + HISI_SPI_FIFOC);  in hisi_spi_hw_init()
332 	hs->fifo_len = 256;  in hisi_spi_hw_init()
338 	struct hisi_spi *hs = spi_controller_get_devdata(host);  in hisi_spi_irq()  local
339 	u32 irq_status = readl(hs->regs + HISI_SPI_ISR) & ISR_MASK;  in hisi_spi_irq()
349 		dev_err(hs->dev, "interrupt_transfer: fifo overflow\n");  in hisi_spi_irq()
358 	hisi_spi_reader(hs);  in hisi_spi_irq()
359 	if (!hs->rx_len)  in hisi_spi_irq()
364 		hisi_spi_writer(hs);  in hisi_spi_irq()
369 	hisi_spi_disable(hs);  in hisi_spi_irq()
377 	struct hisi_spi *hs = spi_controller_get_devdata(host);  in hisi_spi_transfer_one()  local
387 	writel(cr, hs->regs + HISI_SPI_CR);  in hisi_spi_transfer_one()
389 	hisi_spi_flush_fifo(hs);  in hisi_spi_transfer_one()
391 	hs->n_bytes = hisi_spi_n_bytes(transfer);  in hisi_spi_transfer_one()
392 	hs->tx = transfer->tx_buf;  in hisi_spi_transfer_one()
393 	hs->tx_len = transfer->len / hs->n_bytes;  in hisi_spi_transfer_one()
394 	hs->rx = transfer->rx_buf;  in hisi_spi_transfer_one()
395 	hs->rx_len = hs->tx_len;  in hisi_spi_transfer_one()
404 	writel(~(u32)IMR_MASK, hs->regs + HISI_SPI_IMR);  in hisi_spi_transfer_one()
405 	writel(1, hs->regs + HISI_SPI_ENR);  in hisi_spi_transfer_one()
413 	struct hisi_spi *hs = spi_controller_get_devdata(host);  in hisi_spi_handle_err()  local
415 	hisi_spi_disable(hs);  in hisi_spi_handle_err()
454 	struct hisi_spi *hs;  in hisi_spi_probe()  local
461 	host = devm_spi_alloc_host(dev, sizeof(*hs));  in hisi_spi_probe()
467 	hs = spi_controller_get_devdata(host);  in hisi_spi_probe()
468 	hs->dev = dev;  in hisi_spi_probe()
469 	hs->irq = irq;  in hisi_spi_probe()
471 	hs->regs = devm_platform_ioremap_resource(pdev, 0);  in hisi_spi_probe()
472 	if (IS_ERR(hs->regs))  in hisi_spi_probe()
473 		return PTR_ERR(hs->regs);  in hisi_spi_probe()
503 	hisi_spi_hw_init(hs);  in hisi_spi_probe()
505 	ret = devm_request_irq(dev, hs->irq, hisi_spi_irq, 0, dev_name(dev),  in hisi_spi_probe()
508 		dev_err(dev, "failed to get IRQ=%d, ret=%d\n", hs->irq, ret);  in hisi_spi_probe()
518 	if (hisi_spi_debugfs_init(hs))  in hisi_spi_probe()
522 		readl(hs->regs + HISI_SPI_VERSION),  in hisi_spi_probe()
531 	struct hisi_spi *hs = spi_controller_get_devdata(host);  in hisi_spi_remove()  local
533 	debugfs_remove_recursive(hs->debugfs);  in hisi_spi_remove()