diff options
Diffstat (limited to 'drivers/phy/rockchip/phy-rockchip-inno-usb2.c')
| -rw-r--r-- | drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c new file mode 100644 index 0000000000..c5ea6ca31f --- /dev/null +++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Rockchip USB2.0 PHY with Innosilicon IP block driver + * + * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd + * Copyright (C) 2020 Amarula Solutions(India) + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <dm/device_compat.h> +#include <dm/lists.h> +#include <generic-phy.h> +#include <reset.h> +#include <syscon.h> +#include <asm/gpio.h> +#include <asm/io.h> +#include <linux/iopoll.h> +#include <asm/arch-rockchip/clock.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define usleep_range(a, b) udelay((b)) +#define BIT_WRITEABLE_SHIFT 16 + +enum rockchip_usb2phy_port_id { + USB2PHY_PORT_OTG, + USB2PHY_PORT_HOST, + USB2PHY_NUM_PORTS, +}; + +struct usb2phy_reg { + unsigned int offset; + unsigned int bitend; + unsigned int bitstart; + unsigned int disable; + unsigned int enable; +}; + +struct rockchip_usb2phy_port_cfg { + struct usb2phy_reg phy_sus; + struct usb2phy_reg bvalid_det_en; + struct usb2phy_reg bvalid_det_st; + struct usb2phy_reg bvalid_det_clr; + struct usb2phy_reg ls_det_en; + struct usb2phy_reg ls_det_st; + struct usb2phy_reg ls_det_clr; + struct usb2phy_reg utmi_avalid; + struct usb2phy_reg utmi_bvalid; + struct usb2phy_reg utmi_ls; + struct usb2phy_reg utmi_hstdet; +}; + +struct rockchip_usb2phy_cfg { + unsigned int reg; + const struct rockchip_usb2phy_port_cfg port_cfgs[USB2PHY_NUM_PORTS]; +}; + +struct rockchip_usb2phy { + void *reg_base; + struct clk phyclk; + const struct rockchip_usb2phy_cfg *phy_cfg; +}; + +static inline int property_enable(void *reg_base, + const struct usb2phy_reg *reg, bool en) +{ + unsigned int val, mask, tmp; + + tmp = en ? reg->enable : reg->disable; + mask = GENMASK(reg->bitend, reg->bitstart); + val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT); + + return writel(val, reg_base + reg->offset); +} + +static const +struct rockchip_usb2phy_port_cfg *us2phy_get_port(struct phy *phy) +{ + struct udevice *parent = dev_get_parent(phy->dev); + struct rockchip_usb2phy *priv = dev_get_priv(parent); + const struct rockchip_usb2phy_cfg *phy_cfg = priv->phy_cfg; + + return &phy_cfg->port_cfgs[phy->id]; +} + +static int rockchip_usb2phy_power_on(struct phy *phy) +{ + struct udevice *parent = dev_get_parent(phy->dev); + struct rockchip_usb2phy *priv = dev_get_priv(parent); + const struct rockchip_usb2phy_port_cfg *port_cfg = us2phy_get_port(phy); + + property_enable(priv->reg_base, &port_cfg->phy_sus, false); + + /* waiting for the utmi_clk to become stable */ + usleep_range(1500, 2000); + + return 0; +} + +static int rockchip_usb2phy_power_off(struct phy *phy) +{ + struct udevice *parent = dev_get_parent(phy->dev); + struct rockchip_usb2phy *priv = dev_get_priv(parent); + const struct rockchip_usb2phy_port_cfg *port_cfg = us2phy_get_port(phy); + + property_enable(priv->reg_base, &port_cfg->phy_sus, true); + + return 0; +} + +static int rockchip_usb2phy_init(struct phy *phy) +{ + struct udevice *parent = dev_get_parent(phy->dev); + struct rockchip_usb2phy *priv = dev_get_priv(parent); + const struct rockchip_usb2phy_port_cfg *port_cfg = us2phy_get_port(phy); + int ret; + + ret = clk_enable(&priv->phyclk); + if (ret) { + dev_err(phy->dev, "failed to enable phyclk (ret=%d)\n", ret); + return ret; + } + + if (phy->id == USB2PHY_PORT_OTG) { + property_enable(priv->reg_base, &port_cfg->bvalid_det_clr, true); + property_enable(priv->reg_base, &port_cfg->bvalid_det_en, true); + } else if (phy->id == USB2PHY_PORT_HOST) { + property_enable(priv->reg_base, &port_cfg->bvalid_det_clr, true); + property_enable(priv->reg_base, &port_cfg->bvalid_det_en, true); + } + + return 0; +} + +static int rockchip_usb2phy_exit(struct phy *phy) +{ + struct udevice *parent = dev_get_parent(phy->dev); + struct rockchip_usb2phy *priv = dev_get_priv(parent); + + clk_disable(&priv->phyclk); + + return 0; +} + +static int rockchip_usb2phy_of_xlate(struct phy *phy, + struct ofnode_phandle_args *args) +{ + const char *name = phy->dev->name; + + if (!strcasecmp(name, "host-port")) + phy->id = USB2PHY_PORT_HOST; + else if (!strcasecmp(name, "otg-port")) + phy->id = USB2PHY_PORT_OTG; + else + dev_err(phy->dev, "improper %s device\n", name); + + return 0; +} + +static struct phy_ops rockchip_usb2phy_ops = { + .init = rockchip_usb2phy_init, + .exit = rockchip_usb2phy_exit, + .power_on = rockchip_usb2phy_power_on, + .power_off = rockchip_usb2phy_power_off, + .of_xlate = rockchip_usb2phy_of_xlate, +}; + +static int rockchip_usb2phy_probe(struct udevice *dev) +{ + struct rockchip_usb2phy *priv = dev_get_priv(dev); + const struct rockchip_usb2phy_cfg *phy_cfgs; + unsigned int reg; + int index, ret; + + priv->reg_base = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + if (IS_ERR(priv->reg_base)) + return PTR_ERR(priv->reg_base); + + ret = ofnode_read_u32(dev_ofnode(dev), "reg", ®); + if (ret) { + dev_err(dev, "failed to read reg property (ret = %d)\n", ret); + return ret; + } + + phy_cfgs = (const struct rockchip_usb2phy_cfg *) + dev_get_driver_data(dev); + if (!phy_cfgs) + return -EINVAL; + + /* find out a proper config which can be matched with dt. */ + index = 0; + while (phy_cfgs[index].reg) { + if (phy_cfgs[index].reg == reg) { + priv->phy_cfg = &phy_cfgs[index]; + break; + } + + ++index; + } + + if (!priv->phy_cfg) { + dev_err(dev, "failed find proper phy-cfg\n"); + return -EINVAL; + } + + ret = clk_get_by_name(dev, "phyclk", &priv->phyclk); + if (ret) { + dev_err(dev, "failed to get the phyclk (ret=%d)\n", ret); + return ret; + } + + return 0; +} + +static int rockchip_usb2phy_bind(struct udevice *dev) +{ + struct udevice *usb2phy_dev; + ofnode node; + const char *name; + int ret = 0; + + dev_for_each_subnode(node, dev) { + if (!ofnode_valid(node)) { + dev_info(dev, "subnode %s not found\n", dev->name); + return -ENXIO; + } + + name = ofnode_get_name(node); + dev_dbg(dev, "subnode %s\n", name); + + ret = device_bind_driver_to_node(dev, "rockchip_usb2phy_port", + name, node, &usb2phy_dev); + if (ret) { + dev_err(dev, + "'%s' cannot bind 'rockchip_usb2phy_port'\n", name); + return ret; + } + } + + return ret; +} + +static const struct rockchip_usb2phy_cfg rk3399_usb2phy_cfgs[] = { + { + .reg = 0xe450, + .port_cfgs = { + [USB2PHY_PORT_OTG] = { + .phy_sus = { 0xe454, 1, 0, 2, 1 }, + .bvalid_det_en = { 0xe3c0, 3, 3, 0, 1 }, + .bvalid_det_st = { 0xe3e0, 3, 3, 0, 1 }, + .bvalid_det_clr = { 0xe3d0, 3, 3, 0, 1 }, + .utmi_avalid = { 0xe2ac, 7, 7, 0, 1 }, + .utmi_bvalid = { 0xe2ac, 12, 12, 0, 1 }, + }, + [USB2PHY_PORT_HOST] = { + .phy_sus = { 0xe458, 1, 0, 0x2, 0x1 }, + .ls_det_en = { 0xe3c0, 6, 6, 0, 1 }, + .ls_det_st = { 0xe3e0, 6, 6, 0, 1 }, + .ls_det_clr = { 0xe3d0, 6, 6, 0, 1 }, + .utmi_ls = { 0xe2ac, 22, 21, 0, 1 }, + .utmi_hstdet = { 0xe2ac, 23, 23, 0, 1 } + } + }, + }, + { + .reg = 0xe460, + .port_cfgs = { + [USB2PHY_PORT_OTG] = { + .phy_sus = { 0xe464, 1, 0, 2, 1 }, + .bvalid_det_en = { 0xe3c0, 8, 8, 0, 1 }, + .bvalid_det_st = { 0xe3e0, 8, 8, 0, 1 }, + .bvalid_det_clr = { 0xe3d0, 8, 8, 0, 1 }, + .utmi_avalid = { 0xe2ac, 10, 10, 0, 1 }, + .utmi_bvalid = { 0xe2ac, 16, 16, 0, 1 }, + }, + [USB2PHY_PORT_HOST] = { + .phy_sus = { 0xe468, 1, 0, 0x2, 0x1 }, + .ls_det_en = { 0xe3c0, 11, 11, 0, 1 }, + .ls_det_st = { 0xe3e0, 11, 11, 0, 1 }, + .ls_det_clr = { 0xe3d0, 11, 11, 0, 1 }, + .utmi_ls = { 0xe2ac, 26, 25, 0, 1 }, + .utmi_hstdet = { 0xe2ac, 27, 27, 0, 1 } + } + }, + }, + { /* sentinel */ } +}; + +static const struct udevice_id rockchip_usb2phy_ids[] = { + { + .compatible = "rockchip,rk3399-usb2phy", + .data = (ulong)&rk3399_usb2phy_cfgs, + }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(rockchip_usb2phy_port) = { + .name = "rockchip_usb2phy_port", + .id = UCLASS_PHY, + .ops = &rockchip_usb2phy_ops, +}; + +U_BOOT_DRIVER(rockchip_usb2phy) = { + .name = "rockchip_usb2phy", + .id = UCLASS_PHY, + .of_match = rockchip_usb2phy_ids, + .probe = rockchip_usb2phy_probe, + .bind = rockchip_usb2phy_bind, + .priv_auto_alloc_size = sizeof(struct rockchip_usb2phy), +}; |