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author | Shawn Lin <shawn.lin@rock-chips.com> | 2021-01-15 18:01:21 +0800 |
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committer | Kever Yang <kever.yang@rock-chips.com> | 2021-01-21 12:00:45 +0800 |
commit | 6ec62b6ca6986196d733383e628e7f5618f4cdd1 (patch) | |
tree | 9e20cf220cebff1d68a1c0595aadd68e0c2e7550 | |
parent | b821e0db460045664d6e6388612bdf99e9c2e07f (diff) | |
download | u-boot-6ec62b6ca6986196d733383e628e7f5618f4cdd1.zip u-boot-6ec62b6ca6986196d733383e628e7f5618f4cdd1.tar.gz u-boot-6ec62b6ca6986196d733383e628e7f5618f4cdd1.tar.bz2 |
phy: rockchip: Add Rockchip Synopsys PCIe 3.0 PHY
Add the Rockchip Synopsys based PCIe 3.0 PHY driver as
part of Generic PHY framework.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kever Yang<kever.yang@rock-chips.com>
-rw-r--r-- | drivers/phy/rockchip/Kconfig | 6 | ||||
-rw-r--r-- | drivers/phy/rockchip/Makefile | 1 | ||||
-rw-r--r-- | drivers/phy/rockchip/phy-rockchip-snps-pcie3.c | 157 |
3 files changed, 164 insertions, 0 deletions
diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig index 2318e71..b794cda 100644 --- a/drivers/phy/rockchip/Kconfig +++ b/drivers/phy/rockchip/Kconfig @@ -18,6 +18,12 @@ config PHY_ROCKCHIP_PCIE help Enable this to support the Rockchip PCIe PHY. +config PHY_ROCKCHIP_SNPS_PCIE3 + bool "Rockchip Snps PCIe3 PHY Driver" + depends on PHY && ARCH_ROCKCHIP + help + Support for Rockchip PCIe3 PHY with Synopsys IP block. + config PHY_ROCKCHIP_TYPEC bool "Rockchip TYPEC PHY Driver" depends on ARCH_ROCKCHIP diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile index 4404915..f6ad3bf 100644 --- a/drivers/phy/rockchip/Makefile +++ b/drivers/phy/rockchip/Makefile @@ -5,4 +5,5 @@ obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2) += phy-rockchip-inno-usb2.o obj-$(CONFIG_PHY_ROCKCHIP_PCIE) += phy-rockchip-pcie.o +obj-$(CONFIG_PHY_ROCKCHIP_SNPS_PCIE3) += phy-rockchip-snps-pcie3.o obj-$(CONFIG_PHY_ROCKCHIP_TYPEC) += phy-rockchip-typec.o diff --git a/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c b/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c new file mode 100644 index 0000000..5ae41fb --- /dev/null +++ b/drivers/phy/rockchip/phy-rockchip-snps-pcie3.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Rockchip PCIE3.0 phy driver + * + * Copyright (C) 2021 Rockchip Electronics Co., Ltd. + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <generic-phy.h> +#include <regmap.h> +#include <reset-uclass.h> +#include <syscon.h> +#include <asm/io.h> +#include <dm/device_compat.h> +#include <dm/lists.h> + +#define GRF_PCIE30PHY_CON1 0x4 +#define GRF_PCIE30PHY_CON6 0x18 +#define GRF_PCIE30PHY_CON9 0x24 + +/** + * struct rockchip_p3phy_priv - RK DW PCIe PHY state + * + * @mmio: The base address of PHY internal registers + * @phy_grf: The regmap for controlling pipe signal + * @p30phy: The reset signal for PHY + * @ref_clk_m: The reference clock of M for PHY + * @ref_clk_n: The reference clock of N for PHY + * @pclk: The clock for accessing PHY blocks + */ +struct rockchip_p3phy_priv { + void __iomem *mmio; + struct regmap *phy_grf; + struct reset_ctl p30phy; + struct clk ref_clk_m; + struct clk ref_clk_n; + struct clk pclk; +}; + +static int rochchip_p3phy_init(struct phy *phy) +{ + struct rockchip_p3phy_priv *priv = dev_get_priv(phy->dev); + int ret; + + ret = clk_enable(&priv->ref_clk_m); + if (ret < 0 && ret != -ENOSYS) + return ret; + + ret = clk_enable(&priv->ref_clk_n); + if (ret < 0 && ret != -ENOSYS) + goto err_ref; + + ret = clk_enable(&priv->pclk); + if (ret < 0 && ret != -ENOSYS) + goto err_pclk; + + reset_assert(&priv->p30phy); + udelay(1); + + /* Deassert PCIe PMA output clamp mode */ + regmap_write(priv->phy_grf, GRF_PCIE30PHY_CON9, + (0x1 << 15) | (0x1 << 31)); + + reset_deassert(&priv->p30phy); + udelay(1); + + return 0; +err_pclk: + clk_disable(&priv->ref_clk_n); +err_ref: + clk_disable(&priv->ref_clk_m); + + return ret; +} + +static int rochchip_p3phy_exit(struct phy *phy) +{ + struct rockchip_p3phy_priv *priv = dev_get_priv(phy->dev); + + clk_disable(&priv->ref_clk_m); + clk_disable(&priv->ref_clk_n); + clk_disable(&priv->pclk); + reset_assert(&priv->p30phy); + + return 0; +} + +static int rockchip_p3phy_probe(struct udevice *dev) +{ + struct rockchip_p3phy_priv *priv = dev_get_priv(dev); + struct udevice *syscon; + int ret; + + priv->mmio = (void __iomem *)dev_read_addr(dev); + if ((fdt_addr_t)priv->mmio == FDT_ADDR_T_NONE) + return -EINVAL; + + ret = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, + "rockchip,phy-grf", &syscon); + if (ret) { + pr_err("unable to find syscon device for rockchip,phy-grf\n"); + return ret; + } + + priv->phy_grf = syscon_get_regmap(syscon); + if (IS_ERR(priv->phy_grf)) { + dev_err(dev, "failed to find rockchip,phy_grf regmap\n"); + return PTR_ERR(priv->phy_grf); + } + + ret = reset_get_by_name(dev, "phy", &priv->p30phy); + if (ret) { + dev_err(dev, "no phy reset control specified\n"); + return ret; + } + + ret = clk_get_by_name(dev, "refclk_m", &priv->ref_clk_m); + if (ret) { + dev_err(dev, "failed to find ref clock M\n"); + return PTR_ERR(&priv->ref_clk_m); + } + + ret = clk_get_by_name(dev, "refclk_n", &priv->ref_clk_n); + if (ret) { + dev_err(dev, "failed to find ref clock N\n"); + return PTR_ERR(&priv->ref_clk_n); + } + + ret = clk_get_by_name(dev, "pclk", &priv->pclk); + if (ret) { + dev_err(dev, "failed to find pclk\n"); + return PTR_ERR(&priv->pclk); + } + + return 0; +} + +static struct phy_ops rochchip_p3phy_ops = { + .init = rochchip_p3phy_init, + .exit = rochchip_p3phy_exit, +}; + +static const struct udevice_id rockchip_p3phy_of_match[] = { + { .compatible = "rockchip,rk3568-pcie3-phy" }, + { }, +}; + +U_BOOT_DRIVER(rockchip_pcie3phy) = { + .name = "rockchip_pcie3phy", + .id = UCLASS_PHY, + .of_match = rockchip_p3phy_of_match, + .ops = &rochchip_p3phy_ops, + .probe = rockchip_p3phy_probe, + .priv_auto = sizeof(struct rockchip_p3phy_priv), +}; |