diff options
author | Álvaro Fernández Rojas <noltari@gmail.com> | 2018-02-04 21:10:13 +0100 |
---|---|---|
committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2018-03-21 23:23:13 +0100 |
commit | f55c1538bf163055a2891d1f0c2ac7fff8bb9b02 (patch) | |
tree | 9bce49dc2fea01bcced79d1cab683a8ec622e73c /drivers/phy/bcm6368-usbh-phy.c | |
parent | e39f6c0b67f496443b339cfef89ffa979b1f1420 (diff) | |
download | u-boot-f55c1538bf163055a2891d1f0c2ac7fff8bb9b02.zip u-boot-f55c1538bf163055a2891d1f0c2ac7fff8bb9b02.tar.gz u-boot-f55c1538bf163055a2891d1f0c2ac7fff8bb9b02.tar.bz2 |
phy: add support for bcm6368 usbh phy
Signed-off-by: Ãlvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Diffstat (limited to 'drivers/phy/bcm6368-usbh-phy.c')
-rw-r--r-- | drivers/phy/bcm6368-usbh-phy.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/phy/bcm6368-usbh-phy.c b/drivers/phy/bcm6368-usbh-phy.c new file mode 100644 index 0000000..71abc0f --- /dev/null +++ b/drivers/phy/bcm6368-usbh-phy.c @@ -0,0 +1,196 @@ +/* + * Copyright (C) 2018 Ãlvaro Fernández Rojas <noltari@gmail.com> + * + * Derived from linux/arch/mips/bcm63xx/usb-common.c: + * Copyright 2008 Maxime Bizon <mbizon@freebox.fr> + * Copyright 2013 Florian Fainelli <florian@openwrt.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <generic-phy.h> +#include <power-domain.h> +#include <reset.h> +#include <asm/io.h> +#include <dm/device.h> + +/* USBH PLL Control register */ +#define USBH_PLL_REG 0x18 +#define USBH_PLL_IDDQ_PWRDN BIT(9) +#define USBH_PLL_PWRDN_DELAY BIT(10) + +/* USBH Swap Control register */ +#define USBH_SWAP_REG 0x1c +#define USBH_SWAP_OHCI_DATA BIT(0) +#define USBH_SWAP_OHCI_ENDIAN BIT(1) +#define USBH_SWAP_EHCI_DATA BIT(3) +#define USBH_SWAP_EHCI_ENDIAN BIT(4) + +/* USBH Setup register */ +#define USBH_SETUP_REG 0x28 +#define USBH_SETUP_IOC BIT(4) +#define USBH_SETUP_IPP BIT(5) + +struct bcm6368_usbh_hw { + uint32_t setup_clr; + uint32_t pll_clr; +}; + +struct bcm6368_usbh_priv { + const struct bcm6368_usbh_hw *hw; + void __iomem *regs; +}; + +static int bcm6368_usbh_init(struct phy *phy) +{ + struct bcm6368_usbh_priv *priv = dev_get_priv(phy->dev); + const struct bcm6368_usbh_hw *hw = priv->hw; + + /* configure to work in native cpu endian */ + clrsetbits_be32(priv->regs + USBH_SWAP_REG, + USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN, + USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA); + + /* setup config */ + if (hw->setup_clr) + clrbits_be32(priv->regs + USBH_SETUP_REG, hw->setup_clr); + + setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC); + + /* enable pll control */ + if (hw->pll_clr) + clrbits_be32(priv->regs + USBH_PLL_REG, hw->pll_clr); + + return 0; +} + +static struct phy_ops bcm6368_usbh_ops = { + .init = bcm6368_usbh_init, +}; + +static const struct bcm6368_usbh_hw bcm6328_hw = { + .pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY, + .setup_clr = 0, +}; + +static const struct bcm6368_usbh_hw bcm6362_hw = { + .pll_clr = 0, + .setup_clr = 0, +}; + +static const struct bcm6368_usbh_hw bcm6368_hw = { + .pll_clr = 0, + .setup_clr = 0, +}; + +static const struct bcm6368_usbh_hw bcm63268_hw = { + .pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY, + .setup_clr = USBH_SETUP_IPP, +}; + +static const struct udevice_id bcm6368_usbh_ids[] = { + { + .compatible = "brcm,bcm6328-usbh", + .data = (ulong)&bcm6328_hw, + }, { + .compatible = "brcm,bcm6362-usbh", + .data = (ulong)&bcm6362_hw, + }, { + .compatible = "brcm,bcm6368-usbh", + .data = (ulong)&bcm6368_hw, + }, { + .compatible = "brcm,bcm63268-usbh", + .data = (ulong)&bcm63268_hw, + }, { /* sentinel */ } +}; + +static int bcm6368_usbh_probe(struct udevice *dev) +{ + struct bcm6368_usbh_priv *priv = dev_get_priv(dev); + const struct bcm6368_usbh_hw *hw = + (const struct bcm6368_usbh_hw *)dev_get_driver_data(dev); +#if defined(CONFIG_POWER_DOMAIN) + struct power_domain pwr_dom; +#endif + struct reset_ctl rst_ctl; + struct clk clk; + fdt_addr_t addr; + fdt_size_t size; + int ret; + + addr = devfdt_get_addr_size_index(dev, 0, &size); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + priv->regs = ioremap(addr, size); + priv->hw = hw; + + /* enable usbh clock */ + ret = clk_get_by_name(dev, "usbh", &clk); + if (ret < 0) + return ret; + + ret = clk_enable(&clk); + if (ret < 0) + return ret; + + ret = clk_free(&clk); + if (ret < 0) + return ret; + +#if defined(CONFIG_POWER_DOMAIN) + /* enable power domain */ + ret = power_domain_get(dev, &pwr_dom); + if (ret < 0) + return ret; + + ret = power_domain_on(&pwr_dom); + if (ret < 0) + return ret; + + ret = power_domain_free(&pwr_dom); + if (ret < 0) + return ret; +#endif + + /* perform reset */ + ret = reset_get_by_index(dev, 0, &rst_ctl); + if (ret < 0) + return ret; + + ret = reset_deassert(&rst_ctl); + if (ret < 0) + return ret; + + ret = reset_free(&rst_ctl); + if (ret < 0) + return ret; + + /* enable usb_ref clock */ + ret = clk_get_by_name(dev, "usb_ref", &clk); + if (!ret) { + ret = clk_enable(&clk); + if (ret < 0) + return ret; + + ret = clk_free(&clk); + if (ret < 0) + return ret; + } + + mdelay(100); + + return 0; +} + +U_BOOT_DRIVER(bcm6368_usbh) = { + .name = "bcm6368-usbh", + .id = UCLASS_PHY, + .of_match = bcm6368_usbh_ids, + .ops = &bcm6368_usbh_ops, + .priv_auto_alloc_size = sizeof(struct bcm6368_usbh_priv), + .probe = bcm6368_usbh_probe, +}; |