Philippe Reynes | 5aa6cfb | 2019-03-15 15:14:36 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | |
| 3 | #include <common.h> |
| 4 | #include <asm/io.h> |
| 5 | #include <memalign.h> |
| 6 | #include <nand.h> |
Simon Glass | 4dcacfc | 2020-05-10 11:40:13 -0600 | [diff] [blame] | 7 | #include <linux/bitops.h> |
Simon Glass | d66c5f7 | 2020-02-03 07:36:15 -0700 | [diff] [blame] | 8 | #include <linux/err.h> |
Philippe Reynes | 5aa6cfb | 2019-03-15 15:14:36 +0100 | [diff] [blame] | 9 | #include <linux/errno.h> |
| 10 | #include <linux/io.h> |
| 11 | #include <linux/ioport.h> |
| 12 | #include <dm.h> |
| 13 | |
| 14 | #include "brcmnand.h" |
| 15 | |
| 16 | struct bcm63158_nand_soc { |
| 17 | struct brcmnand_soc soc; |
| 18 | void __iomem *base; |
| 19 | }; |
| 20 | |
| 21 | #define BCM63158_NAND_INT 0x00 |
| 22 | #define BCM63158_NAND_STATUS_SHIFT 0 |
| 23 | #define BCM63158_NAND_STATUS_MASK (0xfff << BCM63158_NAND_STATUS_SHIFT) |
| 24 | |
| 25 | #define BCM63158_NAND_INT_EN 0x04 |
| 26 | #define BCM63158_NAND_ENABLE_SHIFT 0 |
| 27 | #define BCM63158_NAND_ENABLE_MASK (0xffff << BCM63158_NAND_ENABLE_SHIFT) |
| 28 | |
| 29 | enum { |
| 30 | BCM63158_NP_READ = BIT(0), |
| 31 | BCM63158_BLOCK_ERASE = BIT(1), |
| 32 | BCM63158_COPY_BACK = BIT(2), |
| 33 | BCM63158_PAGE_PGM = BIT(3), |
| 34 | BCM63158_CTRL_READY = BIT(4), |
| 35 | BCM63158_DEV_RBPIN = BIT(5), |
| 36 | BCM63158_ECC_ERR_UNC = BIT(6), |
| 37 | BCM63158_ECC_ERR_CORR = BIT(7), |
| 38 | }; |
| 39 | |
| 40 | static bool bcm63158_nand_intc_ack(struct brcmnand_soc *soc) |
| 41 | { |
| 42 | struct bcm63158_nand_soc *priv = |
| 43 | container_of(soc, struct bcm63158_nand_soc, soc); |
| 44 | void __iomem *mmio = priv->base + BCM63158_NAND_INT; |
| 45 | u32 val = brcmnand_readl(mmio); |
| 46 | |
| 47 | if (val & (BCM63158_CTRL_READY << BCM63158_NAND_STATUS_SHIFT)) { |
| 48 | /* Ack interrupt */ |
| 49 | val &= ~BCM63158_NAND_STATUS_MASK; |
| 50 | val |= BCM63158_CTRL_READY << BCM63158_NAND_STATUS_SHIFT; |
| 51 | brcmnand_writel(val, mmio); |
| 52 | return true; |
| 53 | } |
| 54 | |
| 55 | return false; |
| 56 | } |
| 57 | |
| 58 | static void bcm63158_nand_intc_set(struct brcmnand_soc *soc, bool en) |
| 59 | { |
| 60 | struct bcm63158_nand_soc *priv = |
| 61 | container_of(soc, struct bcm63158_nand_soc, soc); |
| 62 | void __iomem *mmio = priv->base + BCM63158_NAND_INT_EN; |
| 63 | u32 val = brcmnand_readl(mmio); |
| 64 | |
| 65 | /* Don't ack any interrupts */ |
| 66 | val &= ~BCM63158_NAND_STATUS_MASK; |
| 67 | |
| 68 | if (en) |
| 69 | val |= BCM63158_CTRL_READY << BCM63158_NAND_ENABLE_SHIFT; |
| 70 | else |
| 71 | val &= ~(BCM63158_CTRL_READY << BCM63158_NAND_ENABLE_SHIFT); |
| 72 | |
| 73 | brcmnand_writel(val, mmio); |
| 74 | } |
| 75 | |
| 76 | static int bcm63158_nand_probe(struct udevice *dev) |
| 77 | { |
| 78 | struct udevice *pdev = dev; |
| 79 | struct bcm63158_nand_soc *priv = dev_get_priv(dev); |
| 80 | struct brcmnand_soc *soc; |
| 81 | struct resource res; |
| 82 | |
| 83 | soc = &priv->soc; |
| 84 | |
| 85 | dev_read_resource_byname(pdev, "nand-int-base", &res); |
| 86 | priv->base = devm_ioremap(dev, res.start, resource_size(&res)); |
| 87 | if (IS_ERR(priv->base)) |
| 88 | return PTR_ERR(priv->base); |
| 89 | |
| 90 | soc->ctlrdy_ack = bcm63158_nand_intc_ack; |
| 91 | soc->ctlrdy_set_enabled = bcm63158_nand_intc_set; |
| 92 | |
| 93 | /* Disable and ack all interrupts */ |
| 94 | brcmnand_writel(0, priv->base + BCM63158_NAND_INT_EN); |
| 95 | brcmnand_writel(0, priv->base + BCM63158_NAND_INT); |
| 96 | |
| 97 | return brcmnand_probe(pdev, soc); |
| 98 | } |
| 99 | |
| 100 | static const struct udevice_id bcm63158_nand_dt_ids[] = { |
| 101 | { |
| 102 | .compatible = "brcm,nand-bcm63158", |
| 103 | }, |
| 104 | { /* sentinel */ } |
| 105 | }; |
| 106 | |
| 107 | U_BOOT_DRIVER(bcm63158_nand) = { |
| 108 | .name = "bcm63158-nand", |
| 109 | .id = UCLASS_MTD, |
| 110 | .of_match = bcm63158_nand_dt_ids, |
| 111 | .probe = bcm63158_nand_probe, |
Simon Glass | 8a2b47f | 2020-12-03 16:55:17 -0700 | [diff] [blame^] | 112 | .priv_auto = sizeof(struct bcm63158_nand_soc), |
Philippe Reynes | 5aa6cfb | 2019-03-15 15:14:36 +0100 | [diff] [blame] | 113 | }; |
| 114 | |
| 115 | void board_nand_init(void) |
| 116 | { |
| 117 | struct udevice *dev; |
| 118 | int ret; |
| 119 | |
| 120 | ret = uclass_get_device_by_driver(UCLASS_MTD, |
| 121 | DM_GET_DRIVER(bcm63158_nand), &dev); |
| 122 | if (ret && ret != -ENODEV) |
| 123 | pr_err("Failed to initialize %s. (error %d)\n", dev->name, |
| 124 | ret); |
| 125 | } |