6  *	https://github.com/yuq/sunxi-nfc-mtd
316 static int sunxi_nfc_wait_int(struct sunxi_nfc *nfc, u32 flags,  in sunxi_nfc_wait_int()  argument
331 		status = readl(nfc->regs + NFC_REG_ST);  in sunxi_nfc_wait_int()
340 	writel(status & flags, nfc->regs + NFC_REG_ST);  in sunxi_nfc_wait_int()
345 static int sunxi_nfc_wait_cmd_fifo_empty(struct sunxi_nfc *nfc)  in sunxi_nfc_wait_cmd_fifo_empty()  argument
353 		if (!(readl(nfc->regs + NFC_REG_ST) & NFC_CMD_FIFO_STATUS))  in sunxi_nfc_wait_cmd_fifo_empty()
357 	dev_err(nfc->dev, "wait for empty cmd FIFO timedout\n");  in sunxi_nfc_wait_cmd_fifo_empty()
361 static int sunxi_nfc_rst(struct sunxi_nfc *nfc)  in sunxi_nfc_rst()  argument
367 	writel(0, nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_rst()
368 	writel(NFC_RESET, nfc->regs + NFC_REG_CTL);  in sunxi_nfc_rst()
372 		if (!(readl(nfc->regs + NFC_REG_CTL) & NFC_RESET))  in sunxi_nfc_rst()
376 	dev_err(nfc->dev, "wait for NAND controller reset timedout\n");  in sunxi_nfc_rst()
384 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_dev_ready()  local
396 		ret = !!(readl(nfc->regs + NFC_REG_ST) &  in sunxi_nfc_dev_ready()
401 		sunxi_nfc_wait_int(nfc, NFC_RB_B2R, timeo);  in sunxi_nfc_dev_ready()
402 		ret = !!(readl(nfc->regs + NFC_REG_ST) &  in sunxi_nfc_dev_ready()
411 		dev_err(nfc->dev, "cannot check R/B NAND status!\n");  in sunxi_nfc_dev_ready()
422 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_select_chip()  local
432 	ctl = readl(nfc->regs + NFC_REG_CTL) &  in sunxi_nfc_select_chip()
448 		writel(mtd->writesize, nfc->regs + NFC_REG_SPARE_AREA);  in sunxi_nfc_select_chip()
450 		if (nfc->clk_rate != sunxi_nand->clk_rate) {  in sunxi_nfc_select_chip()
452 			nfc->clk_rate = sunxi_nand->clk_rate;  in sunxi_nfc_select_chip()
456 	writel(sunxi_nand->timing_ctl, nfc->regs + NFC_REG_TIMING_CTL);  in sunxi_nfc_select_chip()
457 	writel(sunxi_nand->timing_cfg, nfc->regs + NFC_REG_TIMING_CFG);  in sunxi_nfc_select_chip()
458 	writel(ctl, nfc->regs + NFC_REG_CTL);  in sunxi_nfc_select_chip()
467 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_read_buf()  local
476 		ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_read_buf()
480 		writel(cnt, nfc->regs + NFC_REG_CNT);  in sunxi_nfc_read_buf()
482 		writel(tmp, nfc->regs + NFC_REG_CMD);  in sunxi_nfc_read_buf()
484 		ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_read_buf()
489 			memcpy_fromio(buf + offs, nfc->regs + NFC_RAM0_BASE,  in sunxi_nfc_read_buf()
500 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_write_buf()  local
509 		ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_write_buf()
513 		writel(cnt, nfc->regs + NFC_REG_CNT);  in sunxi_nfc_write_buf()
514 		memcpy_toio(nfc->regs + NFC_RAM0_BASE, buf + offs, cnt);  in sunxi_nfc_write_buf()
517 		writel(tmp, nfc->regs + NFC_REG_CMD);  in sunxi_nfc_write_buf()
519 		ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_write_buf()
541 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_cmd_ctrl()  local
545 	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_cmd_ctrl()
550 		tmp = readl(nfc->regs + NFC_REG_CTL);  in sunxi_nfc_cmd_ctrl()
555 		writel(tmp, nfc->regs + NFC_REG_CTL);  in sunxi_nfc_cmd_ctrl()
571 			       nfc->regs + NFC_REG_RCMD_SET);  in sunxi_nfc_cmd_ctrl()
580 			       nfc->regs + NFC_REG_ADDR_LOW);  in sunxi_nfc_cmd_ctrl()
585 			       nfc->regs + NFC_REG_ADDR_HIGH);  in sunxi_nfc_cmd_ctrl()
587 		writel(cmd, nfc->regs + NFC_REG_CMD);  in sunxi_nfc_cmd_ctrl()
591 		sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_cmd_ctrl()
707 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_randomizer_config()  local
708 	u32 ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_config()
714 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_config()
716 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_SEED_MSK;  in sunxi_nfc_randomizer_config()
717 	writel(ecc_ctl | NFC_RANDOM_SEED(state), nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_config()
723 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_randomizer_enable()  local
728 	writel(readl(nfc->regs + NFC_REG_ECC_CTL) | NFC_RANDOM_EN,  in sunxi_nfc_randomizer_enable()
729 	       nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_enable()
735 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_randomizer_disable()  local
740 	writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_EN,  in sunxi_nfc_randomizer_disable()
741 	       nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_disable()
774 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_enable()  local
778 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_hw_ecc_enable()
786 	writel(ecc_ctl, nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_hw_ecc_enable()
792 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_disable()  local
794 	writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_ECC_EN,  in sunxi_nfc_hw_ecc_disable()
795 	       nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_hw_ecc_disable()
814 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_read_chunk()  local
828 	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_hw_ecc_read_chunk()
834 	       nfc->regs + NFC_REG_CMD);  in sunxi_nfc_hw_ecc_read_chunk()
836 	ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_hw_ecc_read_chunk()
843 	status = readl(nfc->regs + NFC_REG_ECC_ST);  in sunxi_nfc_hw_ecc_read_chunk()
847 		if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID) & 0x1)))  in sunxi_nfc_hw_ecc_read_chunk()
856 	ret = NFC_ECC_ERR_CNT(0, readl(nfc->regs + NFC_REG_ECC_ERR_CNT(0)));  in sunxi_nfc_hw_ecc_read_chunk()
858 	memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE, ecc->size);  in sunxi_nfc_hw_ecc_read_chunk()
885 		sunxi_nfc_user_data_to_buf(readl(nfc->regs +  in sunxi_nfc_hw_ecc_read_chunk()
941 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_write_chunk()  local
957 		       nfc->regs + NFC_REG_USER_DATA(0));  in sunxi_nfc_hw_ecc_write_chunk()
960 		       nfc->regs + NFC_REG_USER_DATA(0));  in sunxi_nfc_hw_ecc_write_chunk()
966 	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_hw_ecc_write_chunk()
973 	       nfc->regs + NFC_REG_CMD);  in sunxi_nfc_hw_ecc_write_chunk()
975 	ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_hw_ecc_write_chunk()
1294 		dev_err(nfc->dev, "unsupported tWB\n");  in sunxi_nand_chip_set_timings()
1300 		dev_err(nfc->dev, "unsupported tADL\n");  in sunxi_nand_chip_set_timings()
1306 		dev_err(nfc->dev, "unsupported tWHR\n");  in sunxi_nand_chip_set_timings()
1313 		dev_err(nfc->dev, "unsupported tRHW\n");  in sunxi_nand_chip_set_timings()
1421 		dev_err(nfc->dev, "unsupported strength\n");  in sunxi_nand_hw_common_ecc_ctrl_init()
1600 static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)  in sunxi_nand_chip_init()  argument
1660 		if (test_and_set_bit(tmp, &nfc->assigned_cs)) {  in sunxi_nand_chip_init()
1701 	nand->controller = &nfc->controller;  in sunxi_nand_chip_init()
1751 	list_add_tail(&chip->node, &nfc->chips);  in sunxi_nand_chip_init()
1756 static int sunxi_nand_chips_init(int node, struct sunxi_nfc *nfc)  in sunxi_nand_chips_init()  argument
1774 		ret = sunxi_nand_chip_init(nand_node, nfc, i++);  in sunxi_nand_chips_init()
1783 static void sunxi_nand_chips_cleanup(struct sunxi_nfc *nfc)  in sunxi_nand_chips_cleanup()  argument
1787 	while (!list_empty(&nfc->chips)) {  in sunxi_nand_chips_cleanup()
1788 		chip = list_first_entry(&nfc->chips, struct sunxi_nand_chip,  in sunxi_nand_chips_cleanup()
1801 	struct sunxi_nfc *nfc;  in sunxi_nand_init()  local
1806 	nfc = kzalloc(sizeof(*nfc), GFP_KERNEL);  in sunxi_nand_init()
1807 	if (!nfc)  in sunxi_nand_init()
1810 	spin_lock_init(&nfc->controller.lock);  in sunxi_nand_init()
1811 	init_waitqueue_head(&nfc->controller.wq);  in sunxi_nand_init()
1812 	INIT_LIST_HEAD(&nfc->chips);  in sunxi_nand_init()
1816 		pr_err("unable to find nfc node in device tree\n");  in sunxi_nand_init()
1821 		pr_err("nfc disabled in device tree\n");  in sunxi_nand_init()
1827 		pr_err("unable to find nfc address in device tree\n");  in sunxi_nand_init()
1831 	nfc->regs = (void *)regs;  in sunxi_nand_init()
1833 	ret = sunxi_nfc_rst(nfc);  in sunxi_nand_init()
1837 	ret = sunxi_nand_chips_init(node, nfc);  in sunxi_nand_init()
1846 	kfree(nfc);  in sunxi_nand_init()