70  * In NFC mode, the NAND Flash controller manages the communication.
71  * We use NFC mode for read and write; raw mode for everything else.
118 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);  in tango_select_target()  local
121 	writel_relaxed(tchip->timing1, nfc->reg_base + NFC_TIMING1);  in tango_select_target()
122 	writel_relaxed(tchip->timing2, nfc->reg_base + NFC_TIMING2);  in tango_select_target()
123 	writel_relaxed(tchip->xfer_cfg, nfc->reg_base + NFC_XFER_CFG);  in tango_select_target()
124 	writel_relaxed(tchip->pkt_0_cfg, nfc->reg_base + NFC_PKT_0_CFG);  in tango_select_target()
125 	writel_relaxed(tchip->pkt_n_cfg, nfc->reg_base + NFC_PKT_N_CFG);  in tango_select_target()
126 	writel_relaxed(tchip->bb_cfg, nfc->reg_base + NFC_BB_CFG);  in tango_select_target()
131 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);  in tango_waitrdy()  local
134 	return readl_relaxed_poll_timeout(nfc->pbus_base + PBUS_CS_CTRL,  in tango_waitrdy()
227 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);  in decode_error_report()  local
229 	status = readl_relaxed(nfc->reg_base + NFC_XFER_STATUS);  in decode_error_report()
233 	res = readl_relaxed(nfc->mem_base + ERROR_REPORT);  in decode_error_report()
250 static int do_dma(struct tango_nfc *nfc, enum dma_data_direction dir, int cmd,  in do_dma()  argument
253 	void __iomem *addr = nfc->reg_base + NFC_STATUS;  in do_dma()
254 	struct dma_chan *chan = nfc->chan;  in do_dma()
275 	writel_relaxed(MODE_NFC, nfc->pbus_base + PBUS_PAD_MODE);  in do_dma()
277 	writel_relaxed(page, nfc->reg_base + NFC_ADDR_PAGE);  in do_dma()
278 	writel_relaxed(0, nfc->reg_base + NFC_ADDR_OFFSET);  in do_dma()
279 	writel_relaxed(cmd, nfc->reg_base + NFC_FLASH_CMD);  in do_dma()
288 	writel_relaxed(MODE_RAW, nfc->pbus_base + PBUS_PAD_MODE);  in do_dma()
300 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);  in tango_read_page()  local
307 	err = do_dma(nfc, DMA_FROM_DEVICE, NFC_READ, buf, len, page);  in tango_read_page()
324 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);  in tango_write_page()  local
334 	writel_relaxed(0xffffffff, nfc->mem_base + METADATA);  in tango_write_page()
335 	err = do_dma(nfc, DMA_TO_DEVICE, NFC_WRITE, buf, len, page);  in tango_write_page()
521 	struct tango_nfc *nfc = to_tango_nfc(chip->controller);  in tango_set_timings()  local
524 	int kHz = nfc->freq_kHz;  in tango_set_timings()
580 	struct tango_nfc *nfc = dev_get_drvdata(dev);  in chip_init()  local
607 	chip->controller = &nfc->hw;  in chip_init()
608 	tchip->base = nfc->pbus_base + (cs * 256);  in chip_init()
629 	nfc->chips[cs] = tchip;  in chip_init()
636 	struct tango_nfc *nfc = platform_get_drvdata(pdev);  in tango_nand_remove()  local
640 	dma_release_channel(nfc->chan);  in tango_nand_remove()
643 		if (nfc->chips[cs]) {  in tango_nand_remove()
644 			chip = &nfc->chips[cs]->nand_chip;  in tango_nand_remove()
659 	struct tango_nfc *nfc;  in tango_nand_probe()  local
662 	nfc = devm_kzalloc(&pdev->dev, sizeof(*nfc), GFP_KERNEL);  in tango_nand_probe()
663 	if (!nfc)  in tango_nand_probe()
667 	nfc->reg_base = devm_ioremap_resource(&pdev->dev, res);  in tango_nand_probe()
668 	if (IS_ERR(nfc->reg_base))  in tango_nand_probe()
669 		return PTR_ERR(nfc->reg_base);  in tango_nand_probe()
672 	nfc->mem_base = devm_ioremap_resource(&pdev->dev, res);  in tango_nand_probe()
673 	if (IS_ERR(nfc->mem_base))  in tango_nand_probe()
674 		return PTR_ERR(nfc->mem_base);  in tango_nand_probe()
677 	nfc->pbus_base = devm_ioremap_resource(&pdev->dev, res);  in tango_nand_probe()
678 	if (IS_ERR(nfc->pbus_base))  in tango_nand_probe()
679 		return PTR_ERR(nfc->pbus_base);  in tango_nand_probe()
681 	writel_relaxed(MODE_RAW, nfc->pbus_base + PBUS_PAD_MODE);  in tango_nand_probe()
687 	nfc->chan = dma_request_chan(&pdev->dev, "rxtx");  in tango_nand_probe()
688 	if (IS_ERR(nfc->chan))  in tango_nand_probe()
689 		return PTR_ERR(nfc->chan);  in tango_nand_probe()
691 	platform_set_drvdata(pdev, nfc);  in tango_nand_probe()
692 	nand_controller_init(&nfc->hw);  in tango_nand_probe()
693 	nfc->hw.ops = &tango_controller_ops;  in tango_nand_probe()
694 	nfc->freq_kHz = clk_get_rate(clk) / 1000;  in tango_nand_probe()