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192 lines
4.0 KiB
192 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2018 Álvaro Fernández Rojas <[email protected]> |
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* |
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* Derived from linux/arch/mips/bcm63xx/usb-common.c: |
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* Copyright 2008 Maxime Bizon <[email protected]> |
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* Copyright 2013 Florian Fainelli <[email protected]> |
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*/ |
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#include <common.h> |
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#include <clk.h> |
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#include <dm.h> |
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#include <generic-phy.h> |
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#include <power-domain.h> |
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#include <reset.h> |
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#include <asm/io.h> |
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#include <dm/device.h> |
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/* USBH PLL Control register */ |
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#define USBH_PLL_REG 0x18 |
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#define USBH_PLL_IDDQ_PWRDN BIT(9) |
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#define USBH_PLL_PWRDN_DELAY BIT(10) |
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/* USBH Swap Control register */ |
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#define USBH_SWAP_REG 0x1c |
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#define USBH_SWAP_OHCI_DATA BIT(0) |
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#define USBH_SWAP_OHCI_ENDIAN BIT(1) |
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#define USBH_SWAP_EHCI_DATA BIT(3) |
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#define USBH_SWAP_EHCI_ENDIAN BIT(4) |
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/* USBH Setup register */ |
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#define USBH_SETUP_REG 0x28 |
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#define USBH_SETUP_IOC BIT(4) |
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#define USBH_SETUP_IPP BIT(5) |
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struct bcm6368_usbh_hw { |
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uint32_t setup_clr; |
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uint32_t pll_clr; |
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}; |
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struct bcm6368_usbh_priv { |
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const struct bcm6368_usbh_hw *hw; |
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void __iomem *regs; |
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}; |
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static int bcm6368_usbh_init(struct phy *phy) |
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{ |
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struct bcm6368_usbh_priv *priv = dev_get_priv(phy->dev); |
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const struct bcm6368_usbh_hw *hw = priv->hw; |
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/* configure to work in native cpu endian */ |
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clrsetbits_be32(priv->regs + USBH_SWAP_REG, |
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USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN, |
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USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA); |
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/* setup config */ |
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if (hw->setup_clr) |
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clrbits_be32(priv->regs + USBH_SETUP_REG, hw->setup_clr); |
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setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC); |
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/* enable pll control */ |
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if (hw->pll_clr) |
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clrbits_be32(priv->regs + USBH_PLL_REG, hw->pll_clr); |
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return 0; |
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} |
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static struct phy_ops bcm6368_usbh_ops = { |
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.init = bcm6368_usbh_init, |
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}; |
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static const struct bcm6368_usbh_hw bcm6328_hw = { |
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.pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY, |
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.setup_clr = 0, |
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}; |
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static const struct bcm6368_usbh_hw bcm6362_hw = { |
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.pll_clr = 0, |
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.setup_clr = 0, |
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}; |
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static const struct bcm6368_usbh_hw bcm6368_hw = { |
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.pll_clr = 0, |
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.setup_clr = 0, |
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}; |
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static const struct bcm6368_usbh_hw bcm63268_hw = { |
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.pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY, |
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.setup_clr = USBH_SETUP_IPP, |
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}; |
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static const struct udevice_id bcm6368_usbh_ids[] = { |
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{ |
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.compatible = "brcm,bcm6328-usbh", |
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.data = (ulong)&bcm6328_hw, |
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}, { |
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.compatible = "brcm,bcm6362-usbh", |
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.data = (ulong)&bcm6362_hw, |
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}, { |
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.compatible = "brcm,bcm6368-usbh", |
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.data = (ulong)&bcm6368_hw, |
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}, { |
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.compatible = "brcm,bcm63268-usbh", |
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.data = (ulong)&bcm63268_hw, |
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}, { /* sentinel */ } |
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}; |
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static int bcm6368_usbh_probe(struct udevice *dev) |
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{ |
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struct bcm6368_usbh_priv *priv = dev_get_priv(dev); |
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const struct bcm6368_usbh_hw *hw = |
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(const struct bcm6368_usbh_hw *)dev_get_driver_data(dev); |
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#if defined(CONFIG_POWER_DOMAIN) |
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struct power_domain pwr_dom; |
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#endif |
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struct reset_ctl rst_ctl; |
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struct clk clk; |
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int ret; |
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priv->regs = dev_remap_addr(dev); |
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if (!priv->regs) |
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return -EINVAL; |
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priv->hw = hw; |
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/* enable usbh clock */ |
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ret = clk_get_by_name(dev, "usbh", &clk); |
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if (ret < 0) |
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return ret; |
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ret = clk_enable(&clk); |
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if (ret < 0) |
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return ret; |
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ret = clk_free(&clk); |
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if (ret < 0) |
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return ret; |
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#if defined(CONFIG_POWER_DOMAIN) |
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/* enable power domain */ |
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ret = power_domain_get(dev, &pwr_dom); |
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if (ret < 0) |
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return ret; |
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ret = power_domain_on(&pwr_dom); |
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if (ret < 0) |
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return ret; |
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ret = power_domain_free(&pwr_dom); |
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if (ret < 0) |
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return ret; |
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#endif |
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/* perform reset */ |
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ret = reset_get_by_index(dev, 0, &rst_ctl); |
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if (ret < 0) |
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return ret; |
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ret = reset_deassert(&rst_ctl); |
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if (ret < 0) |
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return ret; |
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ret = reset_free(&rst_ctl); |
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if (ret < 0) |
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return ret; |
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/* enable usb_ref clock */ |
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ret = clk_get_by_name(dev, "usb_ref", &clk); |
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if (!ret) { |
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ret = clk_enable(&clk); |
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if (ret < 0) |
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return ret; |
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ret = clk_free(&clk); |
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if (ret < 0) |
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return ret; |
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} |
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mdelay(100); |
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return 0; |
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} |
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U_BOOT_DRIVER(bcm6368_usbh) = { |
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.name = "bcm6368-usbh", |
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.id = UCLASS_PHY, |
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.of_match = bcm6368_usbh_ids, |
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.ops = &bcm6368_usbh_ops, |
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.priv_auto_alloc_size = sizeof(struct bcm6368_usbh_priv), |
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.probe = bcm6368_usbh_probe, |
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};
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