7  *	https://github.com/yuq/sunxi-nfc-mtd
315 static int sunxi_nfc_wait_int(struct sunxi_nfc *nfc, u32 flags,  in sunxi_nfc_wait_int()  argument
330 		status = readl(nfc->regs + NFC_REG_ST);  in sunxi_nfc_wait_int()
339 	writel(status & flags, nfc->regs + NFC_REG_ST);  in sunxi_nfc_wait_int()
344 static int sunxi_nfc_wait_cmd_fifo_empty(struct sunxi_nfc *nfc)  in sunxi_nfc_wait_cmd_fifo_empty()  argument
352 		if (!(readl(nfc->regs + NFC_REG_ST) & NFC_CMD_FIFO_STATUS))  in sunxi_nfc_wait_cmd_fifo_empty()
356 	dev_err(nfc->dev, "wait for empty cmd FIFO timedout\n");  in sunxi_nfc_wait_cmd_fifo_empty()
360 static int sunxi_nfc_rst(struct sunxi_nfc *nfc)  in sunxi_nfc_rst()  argument
366 	writel(0, nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_rst()
367 	writel(NFC_RESET, nfc->regs + NFC_REG_CTL);  in sunxi_nfc_rst()
371 		if (!(readl(nfc->regs + NFC_REG_CTL) & NFC_RESET))  in sunxi_nfc_rst()
375 	dev_err(nfc->dev, "wait for NAND controller reset timedout\n");  in sunxi_nfc_rst()
383 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_dev_ready()  local
395 		ret = !!(readl(nfc->regs + NFC_REG_ST) &  in sunxi_nfc_dev_ready()
400 		sunxi_nfc_wait_int(nfc, NFC_RB_B2R, timeo);  in sunxi_nfc_dev_ready()
401 		ret = !!(readl(nfc->regs + NFC_REG_ST) &  in sunxi_nfc_dev_ready()
410 		dev_err(nfc->dev, "cannot check R/B NAND status!\n");  in sunxi_nfc_dev_ready()
421 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_select_chip()  local
431 	ctl = readl(nfc->regs + NFC_REG_CTL) &  in sunxi_nfc_select_chip()
447 		writel(mtd->writesize, nfc->regs + NFC_REG_SPARE_AREA);  in sunxi_nfc_select_chip()
449 		if (nfc->clk_rate != sunxi_nand->clk_rate) {  in sunxi_nfc_select_chip()
451 			nfc->clk_rate = sunxi_nand->clk_rate;  in sunxi_nfc_select_chip()
455 	writel(sunxi_nand->timing_ctl, nfc->regs + NFC_REG_TIMING_CTL);  in sunxi_nfc_select_chip()
456 	writel(sunxi_nand->timing_cfg, nfc->regs + NFC_REG_TIMING_CFG);  in sunxi_nfc_select_chip()
457 	writel(ctl, nfc->regs + NFC_REG_CTL);  in sunxi_nfc_select_chip()
466 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_read_buf()  local
475 		ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_read_buf()
479 		writel(cnt, nfc->regs + NFC_REG_CNT);  in sunxi_nfc_read_buf()
481 		writel(tmp, nfc->regs + NFC_REG_CMD);  in sunxi_nfc_read_buf()
483 		ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_read_buf()
488 			memcpy_fromio(buf + offs, nfc->regs + NFC_RAM0_BASE,  in sunxi_nfc_read_buf()
499 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_write_buf()  local
508 		ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_write_buf()
512 		writel(cnt, nfc->regs + NFC_REG_CNT);  in sunxi_nfc_write_buf()
513 		memcpy_toio(nfc->regs + NFC_RAM0_BASE, buf + offs, cnt);  in sunxi_nfc_write_buf()
516 		writel(tmp, nfc->regs + NFC_REG_CMD);  in sunxi_nfc_write_buf()
518 		ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_write_buf()
540 	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);  in sunxi_nfc_cmd_ctrl()  local
544 	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_cmd_ctrl()
549 		tmp = readl(nfc->regs + NFC_REG_CTL);  in sunxi_nfc_cmd_ctrl()
554 		writel(tmp, nfc->regs + NFC_REG_CTL);  in sunxi_nfc_cmd_ctrl()
570 			       nfc->regs + NFC_REG_RCMD_SET);  in sunxi_nfc_cmd_ctrl()
579 			       nfc->regs + NFC_REG_ADDR_LOW);  in sunxi_nfc_cmd_ctrl()
584 			       nfc->regs + NFC_REG_ADDR_HIGH);  in sunxi_nfc_cmd_ctrl()
586 		writel(cmd, nfc->regs + NFC_REG_CMD);  in sunxi_nfc_cmd_ctrl()
590 		sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_cmd_ctrl()
706 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_randomizer_config()  local
707 	u32 ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_config()
713 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_config()
715 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_SEED_MSK;  in sunxi_nfc_randomizer_config()
716 	writel(ecc_ctl | NFC_RANDOM_SEED(state), nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_config()
722 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_randomizer_enable()  local
727 	writel(readl(nfc->regs + NFC_REG_ECC_CTL) | NFC_RANDOM_EN,  in sunxi_nfc_randomizer_enable()
728 	       nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_enable()
734 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_randomizer_disable()  local
739 	writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_EN,  in sunxi_nfc_randomizer_disable()
740 	       nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_randomizer_disable()
773 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_enable()  local
777 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_hw_ecc_enable()
785 	writel(ecc_ctl, nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_hw_ecc_enable()
791 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_disable()  local
793 	writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_ECC_EN,  in sunxi_nfc_hw_ecc_disable()
794 	       nfc->regs + NFC_REG_ECC_CTL);  in sunxi_nfc_hw_ecc_disable()
813 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_read_chunk()  local
827 	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_hw_ecc_read_chunk()
833 	       nfc->regs + NFC_REG_CMD);  in sunxi_nfc_hw_ecc_read_chunk()
835 	ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_hw_ecc_read_chunk()
842 	status = readl(nfc->regs + NFC_REG_ECC_ST);  in sunxi_nfc_hw_ecc_read_chunk()
846 		if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID) & 0x1)))  in sunxi_nfc_hw_ecc_read_chunk()
855 	ret = NFC_ECC_ERR_CNT(0, readl(nfc->regs + NFC_REG_ECC_ERR_CNT(0)));  in sunxi_nfc_hw_ecc_read_chunk()
857 	memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE, ecc->size);  in sunxi_nfc_hw_ecc_read_chunk()
884 		sunxi_nfc_user_data_to_buf(readl(nfc->regs +  in sunxi_nfc_hw_ecc_read_chunk()
940 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);  in sunxi_nfc_hw_ecc_write_chunk()  local
956 		       nfc->regs + NFC_REG_USER_DATA(0));  in sunxi_nfc_hw_ecc_write_chunk()
959 		       nfc->regs + NFC_REG_USER_DATA(0));  in sunxi_nfc_hw_ecc_write_chunk()
965 	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);  in sunxi_nfc_hw_ecc_write_chunk()
972 	       nfc->regs + NFC_REG_CMD);  in sunxi_nfc_hw_ecc_write_chunk()
974 	ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);  in sunxi_nfc_hw_ecc_write_chunk()
1293 		dev_err(nfc->dev, "unsupported tWB\n");  in sunxi_nand_chip_set_timings()
1299 		dev_err(nfc->dev, "unsupported tADL\n");  in sunxi_nand_chip_set_timings()
1305 		dev_err(nfc->dev, "unsupported tWHR\n");  in sunxi_nand_chip_set_timings()
1312 		dev_err(nfc->dev, "unsupported tRHW\n");  in sunxi_nand_chip_set_timings()
1420 		dev_err(nfc->dev, "unsupported strength\n");  in sunxi_nand_hw_common_ecc_ctrl_init()
1599 static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)  in sunxi_nand_chip_init()  argument
1659 		if (test_and_set_bit(tmp, &nfc->assigned_cs)) {  in sunxi_nand_chip_init()
1700 	nand->controller = &nfc->controller;  in sunxi_nand_chip_init()
1750 	list_add_tail(&chip->node, &nfc->chips);  in sunxi_nand_chip_init()
1755 static int sunxi_nand_chips_init(int node, struct sunxi_nfc *nfc)  in sunxi_nand_chips_init()  argument
1773 		ret = sunxi_nand_chip_init(nand_node, nfc, i++);  in sunxi_nand_chips_init()
1782 static void sunxi_nand_chips_cleanup(struct sunxi_nfc *nfc)  in sunxi_nand_chips_cleanup()  argument
1786 	while (!list_empty(&nfc->chips)) {  in sunxi_nand_chips_cleanup()
1787 		chip = list_first_entry(&nfc->chips, struct sunxi_nand_chip,  in sunxi_nand_chips_cleanup()
1800 	struct sunxi_nfc *nfc;  in sunxi_nand_init()  local
1805 	nfc = kzalloc(sizeof(*nfc), GFP_KERNEL);  in sunxi_nand_init()
1806 	if (!nfc)  in sunxi_nand_init()
1809 	spin_lock_init(&nfc->controller.lock);  in sunxi_nand_init()
1810 	init_waitqueue_head(&nfc->controller.wq);  in sunxi_nand_init()
1811 	INIT_LIST_HEAD(&nfc->chips);  in sunxi_nand_init()
1815 		pr_err("unable to find nfc node in device tree\n");  in sunxi_nand_init()
1820 		pr_err("nfc disabled in device tree\n");  in sunxi_nand_init()
1826 		pr_err("unable to find nfc address in device tree\n");  in sunxi_nand_init()
1830 	nfc->regs = (void *)regs;  in sunxi_nand_init()
1832 	ret = sunxi_nfc_rst(nfc);  in sunxi_nand_init()
1836 	ret = sunxi_nand_chips_init(node, nfc);  in sunxi_nand_init()
1845 	kfree(nfc);  in sunxi_nand_init()