| Alex Marginean | 0649be5 | 2019-07-12 10:13:53 +0300 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * (C) Copyright 2019 |
| 4 | * Alex Marginean, NXP |
| 5 | */ |
| 6 | |
| 7 | #include <dm.h> |
| 8 | #include <errno.h> |
| 9 | #include <miiphy.h> |
| 10 | |
| 11 | /* macros copied over from mdio_sandbox.c */ |
| 12 | #define SANDBOX_PHY_ADDR 5 |
| 13 | #define SANDBOX_PHY_REG_CNT 2 |
| 14 | |
| 15 | struct mdio_mux_sandbox_priv { |
| 16 | int enabled; |
| 17 | int sel; |
| 18 | }; |
| 19 | |
| 20 | static int mdio_mux_sandbox_mark_selection(struct udevice *dev, int sel) |
| 21 | { |
| 22 | struct udevice *mdio; |
| 23 | struct mdio_ops *ops; |
| 24 | int err; |
| 25 | |
| 26 | /* |
| 27 | * find the sandbox parent mdio and write a register on the PHY there |
| 28 | * so the mux test can verify selection. |
| 29 | */ |
| 30 | err = uclass_get_device_by_name(UCLASS_MDIO, "mdio-test", &mdio); |
| 31 | if (err) |
| 32 | return err; |
| 33 | ops = mdio_get_ops(mdio); |
| 34 | return ops->write(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE, |
| 35 | SANDBOX_PHY_REG_CNT - 1, (u16)sel); |
| 36 | } |
| 37 | |
| 38 | static int mdio_mux_sandbox_select(struct udevice *dev, int cur, int sel) |
| 39 | { |
| 40 | struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev); |
| 41 | |
| 42 | if (!priv->enabled) |
| 43 | return -ENODEV; |
| 44 | |
| 45 | if (cur != priv->sel) |
| 46 | return -EINVAL; |
| 47 | |
| 48 | priv->sel = sel; |
| 49 | mdio_mux_sandbox_mark_selection(dev, priv->sel); |
| 50 | |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static int mdio_mux_sandbox_deselect(struct udevice *dev, int sel) |
| 55 | { |
| 56 | struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev); |
| 57 | |
| 58 | if (!priv->enabled) |
| 59 | return -ENODEV; |
| 60 | |
| 61 | if (sel != priv->sel) |
| 62 | return -EINVAL; |
| 63 | |
| 64 | priv->sel = -1; |
| 65 | mdio_mux_sandbox_mark_selection(dev, priv->sel); |
| 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static const struct mdio_mux_ops mdio_mux_sandbox_ops = { |
| 71 | .select = mdio_mux_sandbox_select, |
| 72 | .deselect = mdio_mux_sandbox_deselect, |
| 73 | }; |
| 74 | |
| 75 | static int mdio_mux_sandbox_probe(struct udevice *dev) |
| 76 | { |
| 77 | struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev); |
| 78 | |
| 79 | priv->enabled = 1; |
| 80 | priv->sel = -1; |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static const struct udevice_id mdio_mux_sandbox_ids[] = { |
| 86 | { .compatible = "sandbox,mdio-mux" }, |
| 87 | { } |
| 88 | }; |
| 89 | |
| 90 | U_BOOT_DRIVER(mdio_mux_sandbox) = { |
| 91 | .name = "mdio_mux_sandbox", |
| 92 | .id = UCLASS_MDIO_MUX, |
| 93 | .of_match = mdio_mux_sandbox_ids, |
| 94 | .probe = mdio_mux_sandbox_probe, |
| 95 | .ops = &mdio_mux_sandbox_ops, |
| 96 | .priv_auto_alloc_size = sizeof(struct mdio_mux_sandbox_priv), |
| 97 | }; |