Alexey Brodkin | 83fd312 | 2015-12-14 17:18:50 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #include <common.h> |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 8 | #include <clk.h> |
Alexey Brodkin | 83fd312 | 2015-12-14 17:18:50 +0300 | [diff] [blame] | 9 | #include <dm.h> |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 10 | #include <dm/ofnode.h> |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 11 | #include <generic-phy.h> |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 12 | #include <reset.h> |
Alexey Brodkin | 83fd312 | 2015-12-14 17:18:50 +0300 | [diff] [blame] | 13 | #include "ohci.h" |
| 14 | |
| 15 | #if !defined(CONFIG_USB_OHCI_NEW) |
| 16 | # error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW" |
| 17 | #endif |
| 18 | |
| 19 | struct generic_ohci { |
| 20 | ohci_t ohci; |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 21 | struct clk *clocks; /* clock list */ |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 22 | struct reset_ctl *resets; /* reset list */ |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 23 | struct phy phy; |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 24 | int clock_count; /* number of clock in clock list */ |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 25 | int reset_count; /* number of reset in reset list */ |
Alexey Brodkin | 83fd312 | 2015-12-14 17:18:50 +0300 | [diff] [blame] | 26 | }; |
| 27 | |
| 28 | static int ohci_usb_probe(struct udevice *dev) |
| 29 | { |
Simon Glass | ba1dea4 | 2017-05-17 17:18:05 -0600 | [diff] [blame] | 30 | struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev); |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 31 | struct generic_ohci *priv = dev_get_priv(dev); |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 32 | int i, err, ret, clock_nb, reset_nb; |
Alexey Brodkin | 83fd312 | 2015-12-14 17:18:50 +0300 | [diff] [blame] | 33 | |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 34 | err = 0; |
| 35 | priv->clock_count = 0; |
| 36 | clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells"); |
| 37 | if (clock_nb > 0) { |
| 38 | priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk), |
| 39 | GFP_KERNEL); |
| 40 | if (!priv->clocks) |
| 41 | return -ENOMEM; |
| 42 | |
| 43 | for (i = 0; i < clock_nb; i++) { |
| 44 | err = clk_get_by_index(dev, i, &priv->clocks[i]); |
| 45 | if (err < 0) |
| 46 | break; |
| 47 | |
| 48 | err = clk_enable(&priv->clocks[i]); |
| 49 | if (err) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 50 | pr_err("failed to enable clock %d\n", i); |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 51 | clk_free(&priv->clocks[i]); |
| 52 | goto clk_err; |
| 53 | } |
| 54 | priv->clock_count++; |
| 55 | } |
| 56 | } else if (clock_nb != -ENOENT) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 57 | pr_err("failed to get clock phandle(%d)\n", clock_nb); |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 58 | return clock_nb; |
| 59 | } |
| 60 | |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 61 | priv->reset_count = 0; |
| 62 | reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells"); |
| 63 | if (reset_nb > 0) { |
| 64 | priv->resets = devm_kcalloc(dev, reset_nb, |
| 65 | sizeof(struct reset_ctl), |
| 66 | GFP_KERNEL); |
| 67 | if (!priv->resets) |
| 68 | return -ENOMEM; |
| 69 | |
| 70 | for (i = 0; i < reset_nb; i++) { |
| 71 | err = reset_get_by_index(dev, i, &priv->resets[i]); |
| 72 | if (err < 0) |
| 73 | break; |
| 74 | |
| 75 | err = reset_deassert(&priv->resets[i]); |
| 76 | if (err) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 77 | pr_err("failed to deassert reset %d\n", i); |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 78 | reset_free(&priv->resets[i]); |
| 79 | goto reset_err; |
| 80 | } |
| 81 | priv->reset_count++; |
| 82 | } |
| 83 | } else if (reset_nb != -ENOENT) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 84 | pr_err("failed to get reset phandle(%d)\n", reset_nb); |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 85 | goto clk_err; |
| 86 | } |
| 87 | |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 88 | err = generic_phy_get_by_index(dev, 0, &priv->phy); |
| 89 | if (err) { |
| 90 | if (err != -ENOENT) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 91 | pr_err("failed to get usb phy\n"); |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 92 | goto reset_err; |
| 93 | } |
Patrice Chotard | eabebc0 | 2017-07-24 17:07:05 +0200 | [diff] [blame] | 94 | } else { |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 95 | |
Patrice Chotard | eabebc0 | 2017-07-24 17:07:05 +0200 | [diff] [blame] | 96 | err = generic_phy_init(&priv->phy); |
| 97 | if (err) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 98 | pr_err("failed to init usb phy\n"); |
Patrice Chotard | eabebc0 | 2017-07-24 17:07:05 +0200 | [diff] [blame] | 99 | goto reset_err; |
| 100 | } |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 101 | } |
| 102 | |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 103 | err = ohci_register(dev, regs); |
| 104 | if (err) |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 105 | goto phy_err; |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 106 | |
| 107 | return 0; |
| 108 | |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 109 | phy_err: |
| 110 | if (generic_phy_valid(&priv->phy)) { |
| 111 | ret = generic_phy_exit(&priv->phy); |
| 112 | if (ret) |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 113 | pr_err("failed to release phy\n"); |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 114 | } |
| 115 | |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 116 | reset_err: |
| 117 | ret = reset_release_all(priv->resets, priv->reset_count); |
| 118 | if (ret) |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 119 | pr_err("failed to assert all resets\n"); |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 120 | clk_err: |
| 121 | ret = clk_release_all(priv->clocks, priv->clock_count); |
| 122 | if (ret) |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 123 | pr_err("failed to disable all clocks\n"); |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 124 | |
| 125 | return err; |
Alexey Brodkin | 83fd312 | 2015-12-14 17:18:50 +0300 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | static int ohci_usb_remove(struct udevice *dev) |
| 129 | { |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 130 | struct generic_ohci *priv = dev_get_priv(dev); |
| 131 | int ret; |
| 132 | |
| 133 | ret = ohci_deregister(dev); |
| 134 | if (ret) |
| 135 | return ret; |
| 136 | |
Patrice Chotard | c6e19d3 | 2017-07-18 11:57:14 +0200 | [diff] [blame] | 137 | if (generic_phy_valid(&priv->phy)) { |
| 138 | ret = generic_phy_exit(&priv->phy); |
| 139 | if (ret) |
| 140 | return ret; |
| 141 | } |
| 142 | |
Patrice Chotard | 170229e | 2017-07-18 11:57:13 +0200 | [diff] [blame] | 143 | ret = reset_release_all(priv->resets, priv->reset_count); |
| 144 | if (ret) |
| 145 | return ret; |
| 146 | |
Patrice Chotard | 37a197a | 2017-07-18 11:57:12 +0200 | [diff] [blame] | 147 | return clk_release_all(priv->clocks, priv->clock_count); |
Alexey Brodkin | 83fd312 | 2015-12-14 17:18:50 +0300 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | static const struct udevice_id ohci_usb_ids[] = { |
| 151 | { .compatible = "generic-ohci" }, |
| 152 | { } |
| 153 | }; |
| 154 | |
| 155 | U_BOOT_DRIVER(ohci_generic) = { |
| 156 | .name = "ohci_generic", |
| 157 | .id = UCLASS_USB, |
| 158 | .of_match = ohci_usb_ids, |
| 159 | .probe = ohci_usb_probe, |
| 160 | .remove = ohci_usb_remove, |
| 161 | .ops = &ohci_usb_ops, |
| 162 | .priv_auto_alloc_size = sizeof(struct generic_ohci), |
| 163 | .flags = DM_FLAG_ALLOC_PRIV_DMA, |
| 164 | }; |