163 static int hisi_spi_debugfs_init(struct hisi_spi *hs)  in hisi_spi_debugfs_init()  argument
169 	master = container_of(hs->dev, struct spi_controller, dev);  in hisi_spi_debugfs_init()
171 	hs->debugfs = debugfs_create_dir(name, NULL);  in hisi_spi_debugfs_init()
172 	if (!hs->debugfs)  in hisi_spi_debugfs_init()
175 	hs->regset.regs = hisi_spi_regs;  in hisi_spi_debugfs_init()
176 	hs->regset.nregs = ARRAY_SIZE(hisi_spi_regs);  in hisi_spi_debugfs_init()
177 	hs->regset.base = hs->regs;  in hisi_spi_debugfs_init()
178 	debugfs_create_regset32("registers", 0400, hs->debugfs, &hs->regset);  in hisi_spi_debugfs_init()
183 static u32 hisi_spi_busy(struct hisi_spi *hs)  in hisi_spi_busy()  argument
185 	return readl(hs->regs + HISI_SPI_SR) & SR_BUSY;  in hisi_spi_busy()
188 static u32 hisi_spi_rx_not_empty(struct hisi_spi *hs)  in hisi_spi_rx_not_empty()  argument
190 	return readl(hs->regs + HISI_SPI_SR) & SR_RXNE;  in hisi_spi_rx_not_empty()
193 static u32 hisi_spi_tx_not_full(struct hisi_spi *hs)  in hisi_spi_tx_not_full()  argument
195 	return readl(hs->regs + HISI_SPI_SR) & SR_TXNF;  in hisi_spi_tx_not_full()
198 static void hisi_spi_flush_fifo(struct hisi_spi *hs)  in hisi_spi_flush_fifo()  argument
203 		while (hisi_spi_rx_not_empty(hs))  in hisi_spi_flush_fifo()
204 			readl(hs->regs + HISI_SPI_DOUT);  in hisi_spi_flush_fifo()
205 	} while (hisi_spi_busy(hs) && limit--);  in hisi_spi_flush_fifo()
209 static void hisi_spi_disable(struct hisi_spi *hs)  in hisi_spi_disable()  argument
211 	writel(0, hs->regs + HISI_SPI_ENR);  in hisi_spi_disable()
212 	writel(IMR_MASK, hs->regs + HISI_SPI_IMR);  in hisi_spi_disable()
213 	writel(ICR_MASK, hs->regs + HISI_SPI_ICR);  in hisi_spi_disable()
226 static void hisi_spi_reader(struct hisi_spi *hs)  in hisi_spi_reader()  argument
228 	u32 max = min_t(u32, hs->rx_len, hs->fifo_len);  in hisi_spi_reader()
231 	while (hisi_spi_rx_not_empty(hs) && max--) {  in hisi_spi_reader()
232 		rxw = readl(hs->regs + HISI_SPI_DOUT);  in hisi_spi_reader()
234 		if (hs->rx) {  in hisi_spi_reader()
235 			switch (hs->n_bytes) {  in hisi_spi_reader()
237 				*(u8 *)(hs->rx) = rxw;  in hisi_spi_reader()
240 				*(u16 *)(hs->rx) = rxw;  in hisi_spi_reader()
243 				*(u32 *)(hs->rx) = rxw;  in hisi_spi_reader()
246 			hs->rx += hs->n_bytes;  in hisi_spi_reader()
248 		--hs->rx_len;  in hisi_spi_reader()
252 static void hisi_spi_writer(struct hisi_spi *hs)  in hisi_spi_writer()  argument
254 	u32 max = min_t(u32, hs->tx_len, hs->fifo_len);  in hisi_spi_writer()
257 	while (hisi_spi_tx_not_full(hs) && max--) {  in hisi_spi_writer()
259 		if (hs->tx) {  in hisi_spi_writer()
260 			switch (hs->n_bytes) {  in hisi_spi_writer()
262 				txw = *(u8 *)(hs->tx);  in hisi_spi_writer()
265 				txw = *(u16 *)(hs->tx);  in hisi_spi_writer()
268 				txw = *(u32 *)(hs->tx);  in hisi_spi_writer()
271 			hs->tx += hs->n_bytes;  in hisi_spi_writer()
273 		writel(txw, hs->regs + HISI_SPI_DIN);  in hisi_spi_writer()
274 		--hs->tx_len;  in hisi_spi_writer()
325 static void hisi_spi_hw_init(struct hisi_spi *hs)  in hisi_spi_hw_init()  argument
327 	hisi_spi_disable(hs);  in hisi_spi_hw_init()
332 		hs->regs + HISI_SPI_FIFOC);  in hisi_spi_hw_init()
334 	hs->fifo_len = 256;  in hisi_spi_hw_init()
340 	struct hisi_spi *hs = spi_controller_get_devdata(master);  in hisi_spi_irq()  local
341 	u32 irq_status = readl(hs->regs + HISI_SPI_ISR) & ISR_MASK;  in hisi_spi_irq()
351 		dev_err(hs->dev, "interrupt_transfer: fifo overflow\n");  in hisi_spi_irq()
360 	hisi_spi_reader(hs);  in hisi_spi_irq()
361 	if (!hs->rx_len)  in hisi_spi_irq()
366 		hisi_spi_writer(hs);  in hisi_spi_irq()
371 	hisi_spi_disable(hs);  in hisi_spi_irq()
379 	struct hisi_spi *hs = spi_controller_get_devdata(master);  in hisi_spi_transfer_one()  local
389 	writel(cr, hs->regs + HISI_SPI_CR);  in hisi_spi_transfer_one()
391 	hisi_spi_flush_fifo(hs);  in hisi_spi_transfer_one()
393 	hs->n_bytes = hisi_spi_n_bytes(transfer);  in hisi_spi_transfer_one()
394 	hs->tx = transfer->tx_buf;  in hisi_spi_transfer_one()
395 	hs->tx_len = transfer->len / hs->n_bytes;  in hisi_spi_transfer_one()
396 	hs->rx = transfer->rx_buf;  in hisi_spi_transfer_one()
397 	hs->rx_len = hs->tx_len;  in hisi_spi_transfer_one()
406 	writel(~(u32)IMR_MASK, hs->regs + HISI_SPI_IMR);  in hisi_spi_transfer_one()
407 	writel(1, hs->regs + HISI_SPI_ENR);  in hisi_spi_transfer_one()
415 	struct hisi_spi *hs = spi_controller_get_devdata(master);  in hisi_spi_handle_err()  local
417 	hisi_spi_disable(hs);  in hisi_spi_handle_err()
456 	struct hisi_spi *hs;  in hisi_spi_probe()  local
463 	master = devm_spi_alloc_master(dev, sizeof(*hs));  in hisi_spi_probe()
469 	hs = spi_controller_get_devdata(master);  in hisi_spi_probe()
470 	hs->dev = dev;  in hisi_spi_probe()
471 	hs->irq = irq;  in hisi_spi_probe()
473 	hs->regs = devm_platform_ioremap_resource(pdev, 0);  in hisi_spi_probe()
474 	if (IS_ERR(hs->regs))  in hisi_spi_probe()
475 		return PTR_ERR(hs->regs);  in hisi_spi_probe()
501 	hisi_spi_hw_init(hs);  in hisi_spi_probe()
503 	ret = devm_request_irq(dev, hs->irq, hisi_spi_irq, 0, dev_name(dev),  in hisi_spi_probe()
506 		dev_err(dev, "failed to get IRQ=%d, ret=%d\n", hs->irq, ret);  in hisi_spi_probe()
516 	if (hisi_spi_debugfs_init(hs))  in hisi_spi_probe()
520 		readl(hs->regs + HISI_SPI_VERSION),  in hisi_spi_probe()
529 	struct hisi_spi *hs = spi_controller_get_devdata(master);  in hisi_spi_remove()  local
531 	debugfs_remove_recursive(hs->debugfs);  in hisi_spi_remove()