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Message-ID: <20220328021832epcms2p6b6294b824c64404c437d0fd7f09369a4@epcms2p6>
Date: Mon, 28 Mar 2022 11:18:32 +0900
From: 이왕석 <wangseok.lee@...sung.com>
To: "robh+dt@...nel.org" <robh+dt@...nel.org>,
"krzk+dt@...nel.org" <krzk+dt@...nel.org>,
"kishon@...com" <kishon@...com>,
"vkoul@...nel.org" <vkoul@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"jesper.nilsson@...s.com" <jesper.nilsson@...s.com>,
"lars.persson@...s.com" <lars.persson@...s.com>
CC: "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
"linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
"kw@...ux.com" <kw@...ux.com>,
"linux-arm-kernel@...s.com" <linux-arm-kernel@...s.com>,
"kernel@...s.com" <kernel@...s.com>,
전문기 <moonki.jun@...sung.com>
Subject: [PATCH 4/5] phy: Add ARTPEC-8 PCIe PHY driver
Add support Axis, ARTPEC-8 SoC.
ARTPEC-8 is the SoC platform of Axis Communications.
This is based on arm64 and support GEN4 & 2lane.
This driver provides PHY interface for ARTPEC-8 SoC PCIe controller,
based on Samsung PCIe PHY IP.
Signed-off-by: Wangseok Lee <wangseok.lee@...sung.com>
---
drivers/phy/Kconfig | 1 +
drivers/phy/Makefile | 1 +
drivers/phy/artpec/Kconfig | 9 +
drivers/phy/artpec/Makefile | 2 +
drivers/phy/artpec/phy-artpec8-pcie.c | 879 ++++++++++++++++++++++++++++++++++
5 files changed, 892 insertions(+)
create mode 100644 drivers/phy/artpec/Kconfig
create mode 100644 drivers/phy/artpec/Makefile
create mode 100644 drivers/phy/artpec/phy-artpec8-pcie.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 82b63e6..9fa4283 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -72,6 +72,7 @@ config PHY_CAN_TRANSCEIVER
source "drivers/phy/allwinner/Kconfig"
source "drivers/phy/amlogic/Kconfig"
+source "drivers/phy/artpec/Kconfig"
source "drivers/phy/broadcom/Kconfig"
source "drivers/phy/cadence/Kconfig"
source "drivers/phy/freescale/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 01e9eff..d748e29 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_PHY_LPC18XX_USB_OTG) += phy-lpc18xx-usb-otg.o
obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
obj-$(CONFIG_USB_LGM_PHY) += phy-lgm-usb.o
obj-y += allwinner/ \
amlogic/ \
+ artpec/ \
broadcom/ \
diff --git a/drivers/phy/artpec/Kconfig b/drivers/phy/artpec/Kconfig
new file mode 100644
index 0000000..23ae7cd
--- /dev/null
+++ b/drivers/phy/artpec/Kconfig
@@ -0,0 +1,9 @@
+config PHY_ARTPEC8_PCIE
+ bool "ARTPEC-8 PCIe PHY driver"
+ depends on OF && (ARCH_ARTPEC || COMPILE_TEST)
+ select GENERIC_PHY
+ help
+ Enable PCIe PHY support for ARTPEC-8 SoC.
+ This driver provides PHY interface for ARTPEC-8 SoC
+ PCIe controller.
+ This is based on Samsung PCIe PHY IP.
diff --git a/drivers/phy/artpec/Makefile b/drivers/phy/artpec/Makefile
new file mode 100644
index 0000000..45d853c
--- /dev/null
+++ b/drivers/phy/artpec/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PHY_ARTPEC8_PCIE) += phy-artpec8-pcie.o
diff --git a/drivers/phy/artpec/phy-artpec8-pcie.c b/drivers/phy/artpec/phy-artpec8-pcie.c
new file mode 100644
index 0000000..febbd04
--- /dev/null
+++ b/drivers/phy/artpec/phy-artpec8-pcie.c
@@ -0,0 +1,879 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PHY provider for ARTPEC-8 PCIe controller
+ *
+ * Copyright (C) 2019 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Jaeho Cho <jaeho79.cho@...sung.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/debugfs.h>
+
+/* ARTPEC-8 PCIe PHY registers */
+/* CMN registers */
+#define PCIE_PHY_CMN_REG004 0x10
+#define PCIE_PHY_CMN_REG00B 0x2C
+#define PCIE_PHY_CMN_REG016 0x58
+#define PCIE_PHY_CMN_REG01C 0x70
+#define PCIE_PHY_CMN_REG021 0x84
+#define PCIE_PHY_CMN_REG024 0x90
+#define PCIE_PHY_CMN_REG025 0x94
+#define PCIE_PHY_CMN_REG0E6 0x398
+#define PCIE_PHY_CMN_REG0E7 0x39C
+#define PCIE_PHY_CMN_REG0E8 0x3A0
+#define PCIE_PHY_CMN_REG0E9 0x3A4
+#define PCIE_PHY_CMN_REG0EA 0x3A8
+#define PCIE_PHY_CMN_REG0EB 0x3AC
+#define PCIE_PHY_CMN_REG0EC 0x3B0
+#define PCIE_PHY_CMN_REG0EE 0x3B8
+#define PCIE_PHY_CMN_REG0EF 0x3BC
+#define PCIE_PHY_CMN_REG0F1 0x3C4
+#define PCIE_PHY_CMN_REG0F3 0x3CC
+#define PCIE_PHY_CMN_REG0F4 0x3D0
+
+#define PCIE_PHY_CMN_REG101 0x404
+#define OV_I_CMN_RSTN BIT(4)
+#define OV_I_INIT_RSTN BIT(6)
+
+#define PCIE_PHY_CMN_REG131 0x4C4
+#define PCIE_PHY_CMN_REG17B 0x5EC
+#define PCIE_PHY_CMN_REG17D 0x5F4
+#define PCIE_PHY_CMN_REG190 0x640
+#define PCIE_PHY_CMN_REG191 0x644
+#define PCIE_PHY_CMN_REG192 0x648
+#define PCIE_PHY_CMN_REG1C7 0x71C
+#define PCIE_PHY_CMN_REG1DF 0x77C
+#define PCIE_PHY_CMN_REG1E0 0x780
+
+#define PCIE_PHY_CMN_REG0B1 0x2C4
+#define ANA_ROPLL_REF_DIG_CLK_SEL BIT(2)
+
+/* External clock */
+#define PCIE_PHY_CMN_REG14D 0x534
+#define PCIE_AUX_RX_MODE_EXTEND BIT(7)
+
+#define PCIE_PHY_CMN_REG0D9 0x364
+#define ANA_AUX_EXT_REF_CLK_SEL BIT(4)
+
+#define PCIE_PHY_CMN_REG10F 0x43C
+#define AUX_PLL_EN_EXTEND BIT(4)
+
+#define PCIE_PHY_CMN_REG11E 0x478
+#define AUX2_PLL_EN_EXTEND BIT(3)
+
+#define PCIE_PHY_CMN_REG0D4 0x350
+#define OV_S_ANA_AUX_EN BIT(3)
+#define OV_I_ANA_AUX_EN BIT(2)
+
+/* LANE registers */
+#define PCIE_PHY_TRSV_REG22D 0x8B4
+#define PCIE_PHY_TRSV_REG23E 0x8F8
+#define PCIE_PHY_TRSV_REG2A5 0xA94
+#define PCIE_PHY_TRSV_REG3E3 0xF8C
+#define PCIE_PHY_TRSV_REG3ED 0xFB4
+#define PCIE_PHY_TRSV_REG20B 0x82C
+#define PCIE_PHY_TRSV_REG20C 0x830
+#define PCIE_PHY_TRSV_REG234 0x8D0
+#define PCIE_PHY_TRSV_REG235 0x8D4
+#define PCIE_PHY_TRSV_REG237 0x8DC
+#define PCIE_PHY_TRSV_REG239 0x8E4
+#define PCIE_PHY_TRSV_REG23A 0x8E8
+#define PCIE_PHY_TRSV_REG23B 0x8EC
+#define PCIE_PHY_TRSV_REG24B 0x92C
+#define PCIE_PHY_TRSV_REG25D 0x974
+#define PCIE_PHY_TRSV_REG262 0x988
+#define PCIE_PHY_TRSV_REG271 0x9C4
+#define PCIE_PHY_TRSV_REG272 0x9C8
+#define PCIE_PHY_TRSV_REG27C 0x9F0
+#define PCIE_PHY_TRSV_REG27D 0x9F4
+#define PCIE_PHY_TRSV_REG27E 0x9F8
+#define PCIE_PHY_TRSV_REG284 0xA10
+#define PCIE_PHY_TRSV_REG289 0xA24
+#define PCIE_PHY_TRSV_REG28A 0xA28
+#define PCIE_PHY_TRSV_REG28B 0xA2C
+#define PCIE_PHY_TRSV_REG28C 0xA30
+#define PCIE_PHY_TRSV_REG28E 0xA38
+#define PCIE_PHY_TRSV_REG28F 0xA3C
+#define PCIE_PHY_TRSV_REG290 0xA40
+#define PCIE_PHY_TRSV_REG291 0xA44
+#define PCIE_PHY_TRSV_REG292 0xA48
+#define PCIE_PHY_TRSV_REG294 0xA50
+#define PCIE_PHY_TRSV_REG295 0xA54
+#define PCIE_PHY_TRSV_REG296 0xA58
+#define PCIE_PHY_TRSV_REG297 0xA5C
+#define PCIE_PHY_TRSV_REG298 0xA60
+#define PCIE_PHY_TRSV_REG29B 0xA6C
+#define PCIE_PHY_TRSV_REG29C 0xA70
+#define PCIE_PHY_TRSV_REG29D 0xA74
+#define PCIE_PHY_TRSV_REG29E 0xA78
+#define PCIE_PHY_TRSV_REG2AA 0xAA8
+#define PCIE_PHY_TRSV_REG2AE 0xAB8
+#define PCIE_PHY_TRSV_REG2C2 0xB08
+#define PCIE_PHY_TRSV_REG2C6 0xB18
+#define PCIE_PHY_TRSV_REG2C7 0xB1C
+#define PCIE_PHY_TRSV_REG2CB 0xB2C
+#define PCIE_PHY_TRSV_REG2CC 0xB30
+#define PCIE_PHY_TRSV_REG2CD 0xB34
+#define PCIE_PHY_TRSV_REG2CE 0xB38
+#define PCIE_PHY_TRSV_REG2D0 0xB40
+#define PCIE_PHY_TRSV_REG2CF 0xB3C
+#define PCIE_PHY_TRSV_REG2E0 0xB80
+#define PCIE_PHY_TRSV_REG2E9 0xBA4
+#define PCIE_PHY_TRSV_REG2EA 0xBA8
+#define PCIE_PHY_TRSV_REG2EB 0xBAC
+#define PCIE_PHY_TRSV_REG315 0xC54
+#define PCIE_PHY_TRSV_REG317 0xC5C
+#define PCIE_PHY_TRSV_REG319 0xC64
+#define PCIE_PHY_TRSV_REG364 0xD90
+#define PCIE_PHY_TRSV_REG36C 0xDB0
+#define PCIE_PHY_TRSV_REG36D 0xDB4
+#define PCIE_PHY_TRSV_REG37E 0xDF8
+#define PCIE_PHY_TRSV_REG37F 0xDFC
+#define PCIE_PHY_TRSV_REG38F 0xE3C
+#define PCIE_PHY_TRSV_REG391 0xE44
+#define PCIE_PHY_TRSV_REG39C 0xE70
+#define PCIE_PHY_TRSV_REG3A8 0xEA0
+#define PCIE_PHY_TRSV_REG3E0 0xF80
+#define PCIE_PHY_TRSV_REG3E1 0xF84
+#define PCIE_PHY_TRSV_REG3E7 0xF9C
+#define PCIE_PHY_TRSV_REG3E9 0xFA4
+#define PCIE_PHY_TRSV_REG3EA 0xFA8
+#define PCIE_PHY_TRSV_REG3EE 0xFB8
+#define PCIE_PHY_TRSV_REG3EF 0xFBC
+#define PCIE_PHY_TRSV_REG3F0 0xFC0
+
+#define PCIE_PHY_TRSV_REG2C0 0xB00
+#define LN_EQ_CTRL_RX_DATA_HOLD BIT(5)
+
+/* RX Preset registers */
+#define PCIE_PHY_CMN_REG17E 0x5F8
+#define PCIE_PHY_CMN_REG180 0x600
+#define PCIE_PHY_CMN_REG181 0x604
+#define PCIE_PHY_CMN_REG182 0x608
+#define PCIE_PHY_CMN_REG183 0x60C
+#define PCIE_PHY_CMN_REG184 0x610
+#define PCIE_PHY_CMN_REG185 0x614
+#define PCIE_PHY_CMN_REG186 0x618
+#define PCIE_PHY_CMN_REG187 0x61C
+
+
+/* ARTPEC-8 PCIe PCS registers */
+#define PCIE_PCS_OUT_VEC_4 0x154
+#define B1_DYNAMIC BIT(3)
+
+/* ARTPEC-8 SYS REG registers */
+#define FSYS_PCIE_CON 0x424
+#define PCIE_PHY_LCPLL_REFCLK_SEL 0x3
+#define PCIE_PHY_ROPLL_REFCLK_SEL (0x3UL << 2)
+#define ROPLL_REFCLK_NOT_AVAILABLE (0x2UL << 2)
+#define PCIE_PHY_LN0_REFCLK_PAD_EN BIT(10)
+#define PCIE_PHY_LN1_REFCLK_PAD_EN BIT(11)
+#define PCIE_PHY_PWR_OFF BIT(7)
+
+/* ARTPEC-8 Sub Controller registers */
+#define SFR_INIT_RSTN 0x1404
+#define SFR_CMN_RSTN 0x1408
+
+#define PCIE_PHY_LN0_REG_START 0x800
+#define PCIE_PHY_LN0_REG_END 0xFCC
+#define OFFSET_PER_LANE 0x800
+
+enum artpec8_pcie_phy_num_lanes {
+ LANE0 = 0,
+ LANE1,
+ LANE_MAX
+};
+
+struct artpec8_pcie_phy_data {
+ const struct phy_ops *ops;
+};
+
+struct artpec8_pcie_phy {
+ const struct artpec8_pcie_phy_data *drv_data;
+ void __iomem *phy_base;
+ void __iomem *pcs_base;
+ void __iomem *elbi_base;
+ struct clk *soc_pll_clk;
+ struct regmap *sysreg;
+ u32 lcpll_ref_clk;
+ const char *mode;
+ u32 num_lanes;
+};
+
+enum artpec8_pcie_ref_clk {
+ REF_CLK_FROM_XO = 0,
+ REF_CLK_FROM_IO,
+ REF_CLK_RESERVED,
+ REF_CLK_FROM_SOC_PLL,
+ REF_CLK_MAX
+};
+
+struct artpec8_pcie_phy_tune_reg {
+ u32 offset;
+ u32 val;
+};
+
+/* ARTPEC-8 PCIe Gen4 x2 PHY CMN register settings */
+struct artpec8_pcie_phy_tune_reg cmn_regs[] = {
+ {PCIE_PHY_CMN_REG004, 0x65},
+ {PCIE_PHY_CMN_REG00B, 0x18},
+ {PCIE_PHY_CMN_REG016, 0x0E},
+ {PCIE_PHY_CMN_REG01C, 0x4F},
+ {PCIE_PHY_CMN_REG021, 0x01},
+ {PCIE_PHY_CMN_REG024, 0x58},
+ {PCIE_PHY_CMN_REG025, 0x98},
+ {PCIE_PHY_CMN_REG0E6, 0x00},
+ {PCIE_PHY_CMN_REG0E7, 0x00},
+ {PCIE_PHY_CMN_REG0E8, 0x3F},
+ {PCIE_PHY_CMN_REG0E9, 0x3F},
+ {PCIE_PHY_CMN_REG0EA, 0xFF},
+ {PCIE_PHY_CMN_REG0EB, 0xFF},
+ {PCIE_PHY_CMN_REG0EC, 0x42},
+ {PCIE_PHY_CMN_REG0EE, 0x3F},
+ {PCIE_PHY_CMN_REG0EF, 0x7F},
+ {PCIE_PHY_CMN_REG0F1, 0x02},
+ {PCIE_PHY_CMN_REG0F3, 0xFF},
+ {PCIE_PHY_CMN_REG0F4, 0xFF},
+ {PCIE_PHY_CMN_REG131, 0x01},
+ {PCIE_PHY_CMN_REG17B, 0xC0},
+ {PCIE_PHY_CMN_REG17D, 0xAF},
+ {PCIE_PHY_CMN_REG190, 0x27},
+ {PCIE_PHY_CMN_REG191, 0x0F},
+ {PCIE_PHY_CMN_REG192, 0x3F},
+ {PCIE_PHY_CMN_REG1C7, 0x05},
+ {PCIE_PHY_CMN_REG1DF, 0x28},
+ {PCIE_PHY_CMN_REG1E0, 0x28},
+};
+
+/* ARTPEC-8 PCIe Gen4 x2 PHY lane register settings */
+struct artpec8_pcie_phy_tune_reg lane_regs[] = {
+ {PCIE_PHY_TRSV_REG22D, 0x00},
+ {PCIE_PHY_TRSV_REG23E, 0x00},
+ {PCIE_PHY_TRSV_REG2A5, 0x73},
+ {PCIE_PHY_TRSV_REG3E3, 0x7B},
+ {PCIE_PHY_TRSV_REG3ED, 0x4B},
+ {PCIE_PHY_TRSV_REG20B, 0x02},
+ {PCIE_PHY_TRSV_REG20C, 0xEA},
+ {PCIE_PHY_TRSV_REG234, 0x7A},
+ {PCIE_PHY_TRSV_REG235, 0x1C},
+ {PCIE_PHY_TRSV_REG237, 0x10},
+ {PCIE_PHY_TRSV_REG239, 0x68},
+ {PCIE_PHY_TRSV_REG23A, 0xC0},
+ {PCIE_PHY_TRSV_REG23B, 0x0B},
+ {PCIE_PHY_TRSV_REG24B, 0x00},
+ {PCIE_PHY_TRSV_REG25D, 0x07},
+ {PCIE_PHY_TRSV_REG262, 0x07},
+ {PCIE_PHY_TRSV_REG271, 0x23},
+ {PCIE_PHY_TRSV_REG272, 0x5E},
+ {PCIE_PHY_TRSV_REG27C, 0x8C},
+ {PCIE_PHY_TRSV_REG27D, 0x5B},
+ {PCIE_PHY_TRSV_REG27E, 0x2C},
+ {PCIE_PHY_TRSV_REG284, 0x33},
+ {PCIE_PHY_TRSV_REG289, 0xD4},
+ {PCIE_PHY_TRSV_REG28A, 0xCC},
+ {PCIE_PHY_TRSV_REG28B, 0xD9},
+ {PCIE_PHY_TRSV_REG28C, 0xDC},
+ {PCIE_PHY_TRSV_REG28E, 0xC6},
+ {PCIE_PHY_TRSV_REG28F, 0x90},
+ {PCIE_PHY_TRSV_REG290, 0x4D},
+ {PCIE_PHY_TRSV_REG291, 0x19},
+ {PCIE_PHY_TRSV_REG292, 0x1C},
+ {PCIE_PHY_TRSV_REG294, 0x05},
+ {PCIE_PHY_TRSV_REG295, 0x10},
+ {PCIE_PHY_TRSV_REG296, 0x0C},
+ {PCIE_PHY_TRSV_REG297, 0x19},
+ {PCIE_PHY_TRSV_REG298, 0x04},
+ {PCIE_PHY_TRSV_REG29B, 0x03},
+ {PCIE_PHY_TRSV_REG29C, 0x1B},
+ {PCIE_PHY_TRSV_REG29D, 0x1B},
+ {PCIE_PHY_TRSV_REG29E, 0x1F},
+ {PCIE_PHY_TRSV_REG2AA, 0x00},
+ {PCIE_PHY_TRSV_REG2AE, 0x1F},
+ {PCIE_PHY_TRSV_REG2C2, 0x25},
+ {PCIE_PHY_TRSV_REG2C6, 0x10},
+ {PCIE_PHY_TRSV_REG2C7, 0x06},
+ {PCIE_PHY_TRSV_REG2CB, 0x10},
+ {PCIE_PHY_TRSV_REG2CC, 0x06},
+ {PCIE_PHY_TRSV_REG2CD, 0x20},
+ {PCIE_PHY_TRSV_REG2CE, 0x27},
+ {PCIE_PHY_TRSV_REG2D0, 0x10},
+ {PCIE_PHY_TRSV_REG2CF, 0x0A},
+ {PCIE_PHY_TRSV_REG2E0, 0x01},
+ {PCIE_PHY_TRSV_REG2E9, 0x11},
+ {PCIE_PHY_TRSV_REG2EA, 0x05},
+ {PCIE_PHY_TRSV_REG2EB, 0x4C},
+ {PCIE_PHY_TRSV_REG315, 0x18},
+ {PCIE_PHY_TRSV_REG317, 0x86},
+ {PCIE_PHY_TRSV_REG319, 0x8E},
+ {PCIE_PHY_TRSV_REG364, 0x00},
+ {PCIE_PHY_TRSV_REG36C, 0x03},
+ {PCIE_PHY_TRSV_REG36D, 0x04},
+ {PCIE_PHY_TRSV_REG37E, 0x06},
+ {PCIE_PHY_TRSV_REG37F, 0x04},
+ {PCIE_PHY_TRSV_REG38F, 0x40},
+ {PCIE_PHY_TRSV_REG391, 0x8B},
+ {PCIE_PHY_TRSV_REG39C, 0xFF},
+ {PCIE_PHY_TRSV_REG3A8, 0x02},
+ {PCIE_PHY_TRSV_REG3E0, 0x93},
+ {PCIE_PHY_TRSV_REG3E1, 0x79},
+ {PCIE_PHY_TRSV_REG3E7, 0xF5},
+ {PCIE_PHY_TRSV_REG3E9, 0x75},
+ {PCIE_PHY_TRSV_REG3EA, 0x0D},
+ {PCIE_PHY_TRSV_REG3EE, 0xE2},
+ {PCIE_PHY_TRSV_REG3EF, 0x6F},
+ {PCIE_PHY_TRSV_REG3F0, 0x3D}
+};
+#define PCIE_PHY_CMN_REG17E 0x5F8
+#define PCIE_PHY_CMN_REG180 0x600
+#define PCIE_PHY_CMN_REG181 0x604
+#define PCIE_PHY_CMN_REG182 0x608
+#define PCIE_PHY_CMN_REG183 0x60C
+#define PCIE_PHY_CMN_REG184 0x610
+#define PCIE_PHY_CMN_REG185 0x614
+#define PCIE_PHY_CMN_REG186 0x618
+#define PCIE_PHY_CMN_REG187 0x61C
+
+struct artpec8_pcie_phy_tune_reg rx_preset_regs[] = {
+ /* 0 */
+ {PCIE_PHY_CMN_REG17E, 0x00},
+ {PCIE_PHY_CMN_REG180, 0x23},
+ {PCIE_PHY_CMN_REG181, 0x44},
+ {PCIE_PHY_CMN_REG182, 0x61},
+ {PCIE_PHY_CMN_REG183, 0x55},
+ {PCIE_PHY_CMN_REG184, 0x14},
+ {PCIE_PHY_CMN_REG185, 0x23},
+ {PCIE_PHY_CMN_REG186, 0x1A},
+ {PCIE_PHY_CMN_REG187, 0x04},
+ {PCIE_PHY_CMN_REG17E, 0x04},
+ {PCIE_PHY_CMN_REG17E, 0x00},
+ /* 1 */
+ {PCIE_PHY_CMN_REG17E, 0x08},
+ {PCIE_PHY_CMN_REG181, 0x42},
+ {PCIE_PHY_CMN_REG17E, 0x0C},
+ {PCIE_PHY_CMN_REG17E, 0x08},
+ /* 2 */
+ {PCIE_PHY_CMN_REG17E, 0x10},
+ {PCIE_PHY_CMN_REG181, 0x40},
+ {PCIE_PHY_CMN_REG17E, 0x14},
+ {PCIE_PHY_CMN_REG17E, 0x10},
+ /* 3 */
+ {PCIE_PHY_CMN_REG17E, 0x18},
+ {PCIE_PHY_CMN_REG181, 0x45},
+ {PCIE_PHY_CMN_REG17E, 0x1C},
+ {PCIE_PHY_CMN_REG17E, 0x18},
+ /* 4 */
+ {PCIE_PHY_CMN_REG17E, 0x20},
+ {PCIE_PHY_CMN_REG181, 0x46},
+ {PCIE_PHY_CMN_REG17E, 0x24},
+ {PCIE_PHY_CMN_REG17E, 0x20},
+ /* 5 */
+ {PCIE_PHY_CMN_REG17E, 0x28},
+ {PCIE_PHY_CMN_REG181, 0x48},
+ {PCIE_PHY_CMN_REG17E, 0x2C},
+ {PCIE_PHY_CMN_REG17E, 0x28},
+ /* 6 */
+ {PCIE_PHY_CMN_REG17E, 0x30},
+ {PCIE_PHY_CMN_REG181, 0x4A},
+ {PCIE_PHY_CMN_REG17E, 0x34},
+ {PCIE_PHY_CMN_REG17E, 0x30},
+ /* 7 */
+ {PCIE_PHY_CMN_REG17E, 0x38},
+ {PCIE_PHY_CMN_REG181, 0x4C},
+ {PCIE_PHY_CMN_REG17E, 0x3C},
+ {PCIE_PHY_CMN_REG17E, 0x38},
+ /* 8 */
+ {PCIE_PHY_CMN_REG17E, 0x40},
+ {PCIE_PHY_CMN_REG180, 0x20},
+ {PCIE_PHY_CMN_REG181, 0x20},
+ {PCIE_PHY_CMN_REG182, 0x01},
+ {PCIE_PHY_CMN_REG17E, 0x44},
+ {PCIE_PHY_CMN_REG17E, 0x40},
+ /* 9 */
+ {PCIE_PHY_CMN_REG17E, 0x48},
+ {PCIE_PHY_CMN_REG180, 0x20},
+ {PCIE_PHY_CMN_REG181, 0x21},
+ {PCIE_PHY_CMN_REG182, 0x01},
+ {PCIE_PHY_CMN_REG17E, 0x4C},
+ {PCIE_PHY_CMN_REG17E, 0x48},
+ /* 10 */
+ {PCIE_PHY_CMN_REG17E, 0x50},
+ {PCIE_PHY_CMN_REG180, 0x24},
+ {PCIE_PHY_CMN_REG181, 0x80},
+ {PCIE_PHY_CMN_REG182, 0x41},
+ {PCIE_PHY_CMN_REG183, 0xAF},
+ {PCIE_PHY_CMN_REG184, 0x26},
+ {PCIE_PHY_CMN_REG185, 0x34},
+ {PCIE_PHY_CMN_REG186, 0x24},
+ {PCIE_PHY_CMN_REG187, 0x06},
+ {PCIE_PHY_CMN_REG17E, 0x54},
+ {PCIE_PHY_CMN_REG17E, 0x50},
+ /* 11 */
+ {PCIE_PHY_CMN_REG17E, 0x58},
+ {PCIE_PHY_CMN_REG181, 0x81},
+ {PCIE_PHY_CMN_REG17E, 0x5C},
+ {PCIE_PHY_CMN_REG17E, 0x58},
+ /* 12 */
+ {PCIE_PHY_CMN_REG17E, 0x60},
+ {PCIE_PHY_CMN_REG181, 0x82},
+ {PCIE_PHY_CMN_REG17E, 0x64},
+ {PCIE_PHY_CMN_REG17E, 0x60},
+ /* 13 */
+ {PCIE_PHY_CMN_REG17E, 0x68},
+ {PCIE_PHY_CMN_REG181, 0x83},
+ {PCIE_PHY_CMN_REG17E, 0x6C},
+ {PCIE_PHY_CMN_REG17E, 0x68},
+ /* 14 */
+ {PCIE_PHY_CMN_REG17E, 0x70},
+ {PCIE_PHY_CMN_REG181, 0x84},
+ {PCIE_PHY_CMN_REG17E, 0x74},
+ {PCIE_PHY_CMN_REG17E, 0x70},
+ /* 15 */
+ {PCIE_PHY_CMN_REG17E, 0x78},
+ {PCIE_PHY_CMN_REG180, 0x24},
+ {PCIE_PHY_CMN_REG181, 0x85},
+ {PCIE_PHY_CMN_REG182, 0x80},
+ {PCIE_PHY_CMN_REG183, 0x7F},
+ {PCIE_PHY_CMN_REG184, 0x2D},
+ {PCIE_PHY_CMN_REG185, 0x34},
+ {PCIE_PHY_CMN_REG186, 0x24},
+ {PCIE_PHY_CMN_REG187, 0x05},
+ {PCIE_PHY_CMN_REG17E, 0x7C},
+ {PCIE_PHY_CMN_REG17E, 0x78},
+ /* 16 */
+ {PCIE_PHY_CMN_REG17E, 0x80},
+ {PCIE_PHY_CMN_REG181, 0x86},
+ {PCIE_PHY_CMN_REG17E, 0x84},
+ {PCIE_PHY_CMN_REG17E, 0x80},
+ /* 17 */
+ {PCIE_PHY_CMN_REG17E, 0x88},
+ {PCIE_PHY_CMN_REG181, 0x87},
+ {PCIE_PHY_CMN_REG17E, 0x8C},
+ {PCIE_PHY_CMN_REG17E, 0x88},
+ /* 18 */
+ {PCIE_PHY_CMN_REG17E, 0x90},
+ {PCIE_PHY_CMN_REG181, 0x88},
+ {PCIE_PHY_CMN_REG17E, 0x94},
+ {PCIE_PHY_CMN_REG17E, 0x90},
+ /* 19 */
+ {PCIE_PHY_CMN_REG17E, 0x98},
+ {PCIE_PHY_CMN_REG181, 0x89},
+ {PCIE_PHY_CMN_REG17E, 0x9C},
+ {PCIE_PHY_CMN_REG17E, 0x98},
+};
+
+
+static void artpec8_pcie_phy_reg_writel(void __iomem *base, u32 val, u32 reg)
+{
+ writel(val, base + reg);
+};
+
+static u32 artpec8_pcie_phy_reg_readl(void __iomem *base, u32 reg)
+{
+ return readl(base + reg);
+};
+
+static struct dentry *debugfs_dir;
+
+/* FOM registers */
+#define PCIE_PHY_FOM_7_0 0xD3C /* TRSV_REG34F */
+#define PCIE_PHY_FOM_15_8 0xF30 /* Undocumented */
+#define PCIE_PHY_FOM_23_16 0xF34 /* Undocumented */
+#define PCIE_PHY_FOM_31_24 0xF2C /* Undocumented */
+
+static int fom_read(void *data, u64 *value)
+{
+ struct phy *phy = data;
+ struct artpec8_pcie_phy *artpec8_phy = phy_get_drvdata(phy);
+ uint32_t fom;
+
+ fom = artpec8_pcie_phy_reg_readl(artpec8_phy->phy_base,
+ PCIE_PHY_FOM_7_0) & 0xff;
+ fom |= (artpec8_pcie_phy_reg_readl(artpec8_phy->phy_base,
+ PCIE_PHY_FOM_15_8) & 0xff) << 8;
+ fom |= (artpec8_pcie_phy_reg_readl(artpec8_phy->phy_base,
+ PCIE_PHY_FOM_23_16) & 0xff) << 16;
+ fom |= (artpec8_pcie_phy_reg_readl(artpec8_phy->phy_base,
+ PCIE_PHY_FOM_31_24) & 0xff) << 24;
+ *value = fom;
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(fom_fops, fom_read, NULL, "%llu\n");
+
+
+static void artpec8_pcie_phy_reg_update(void __iomem *base, u32 mask,
+ u32 update, u32 reg)
+{
+ u32 val;
+
+ val = artpec8_pcie_phy_reg_readl(base, reg);
+ val &= ~(mask);
+ val |= update;
+ artpec8_pcie_phy_reg_writel(base, val, reg);
+};
+
+static void artpec8_pcie_enable_ref_clk_from_xo(struct artpec8_pcie_phy
+ *pciephy)
+{
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LCPLL_REFCLK_SEL,
+ REF_CLK_FROM_XO);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_ROPLL_REFCLK_SEL,
+ ROPLL_REFCLK_NOT_AVAILABLE);
+};
+
+static void artpec8_pcie_enable_ref_clk_from_io(struct artpec8_pcie_phy
+ *pciephy)
+{
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ PCIE_AUX_RX_MODE_EXTEND, 0,
+ PCIE_PHY_CMN_REG14D);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ ANA_AUX_EXT_REF_CLK_SEL, 0,
+ PCIE_PHY_CMN_REG0D9);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ AUX_PLL_EN_EXTEND, 0,
+ PCIE_PHY_CMN_REG10F);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ AUX2_PLL_EN_EXTEND, 0,
+ PCIE_PHY_CMN_REG11E);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ OV_S_ANA_AUX_EN, OV_S_ANA_AUX_EN,
+ PCIE_PHY_CMN_REG0D4);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ OV_I_ANA_AUX_EN, OV_I_ANA_AUX_EN,
+ PCIE_PHY_CMN_REG0D4);
+
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LCPLL_REFCLK_SEL,
+ REF_CLK_FROM_IO);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_ROPLL_REFCLK_SEL,
+ ROPLL_REFCLK_NOT_AVAILABLE);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LN0_REFCLK_PAD_EN,
+ PCIE_PHY_LN0_REFCLK_PAD_EN);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LN1_REFCLK_PAD_EN,
+ PCIE_PHY_LN1_REFCLK_PAD_EN);
+}
+
+static void artpec8_pcie_enable_ref_clk_from_soc_pll(struct artpec8_pcie_phy
+ *pciephy)
+{
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LCPLL_REFCLK_SEL,
+ REF_CLK_FROM_SOC_PLL);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_ROPLL_REFCLK_SEL,
+ ROPLL_REFCLK_NOT_AVAILABLE);
+}
+
+static void artpec8_pcie_lane_control(struct phy *phy, u32 lane0_reg, u32 mask,
+ u32 val)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+ u32 lanex_reg = lane0_reg;
+ int i;
+
+ if (lane0_reg < PCIE_PHY_LN0_REG_START ||
+ lane0_reg > PCIE_PHY_LN0_REG_END) {
+ dev_err(&phy->dev, "offset [0x%04x] out of range of lane0\n",
+ lane0_reg);
+ return;
+ }
+
+
+ for (i = 0; i < pciephy->num_lanes; i++) {
+ lanex_reg += OFFSET_PER_LANE * i;
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, mask, val,
+ lanex_reg);
+ }
+}
+
+static void artpec8_pcie_phy_tune(struct artpec8_pcie_phy *pciephy)
+{
+ int i, count;
+
+ /* init cmn registers */
+ count = ARRAY_SIZE(cmn_regs);
+ for (i = 0; i < count; i++) {
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ cmn_regs[i].val,
+ cmn_regs[i].offset);
+ }
+
+ /* init lane registers */
+ count = ARRAY_SIZE(lane_regs);
+ for (i = 0; i < count; i++) {
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ lane_regs[i].val,
+ lane_regs[i].offset);
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ lane_regs[i].val,
+ lane_regs[i].offset +
+ OFFSET_PER_LANE);
+ }
+
+ /* rx preset registers */
+ count = ARRAY_SIZE(rx_preset_regs);
+ for (i = 0; i < count; i++) {
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ rx_preset_regs[i].val,
+ rx_preset_regs[i].offset);
+ }
+}
+
+static int artpec8_pcie_phy_init(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ /* reset init_rstn and cmn_rstn */
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, OV_I_CMN_RSTN | OV_I_INIT_RSTN,
+ 0, PCIE_PHY_CMN_REG101);
+
+ /* reference clock selection */
+ switch (pciephy->lcpll_ref_clk) {
+ case REF_CLK_FROM_XO:
+ artpec8_pcie_enable_ref_clk_from_xo(pciephy);
+ break;
+ case REF_CLK_FROM_IO:
+ artpec8_pcie_enable_ref_clk_from_io(pciephy);
+ break;
+ case REF_CLK_FROM_SOC_PLL:
+ artpec8_pcie_enable_ref_clk_from_soc_pll(pciephy);
+ break;
+ default:
+ dev_err(&phy->dev, "invalid reference clock [%d]\n",
+ pciephy->lcpll_ref_clk);
+ break;
+ }
+
+ dev_dbg(&phy->dev, "phy init, lcpll_ref_clk[%d]\n",
+ pciephy->lcpll_ref_clk);
+
+ /* release i_init_rstn */
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, OV_I_INIT_RSTN,
+ OV_I_INIT_RSTN, PCIE_PHY_CMN_REG101);
+
+ /* phy initial settings */
+ artpec8_pcie_phy_tune(pciephy);
+
+ /* pll_en should be set to off when PM_STATE is P1.CPM */
+ if (!strncmp(pciephy->mode, "pcie_ep", strlen("pcie_ep"))) {
+ artpec8_pcie_phy_reg_update(pciephy->pcs_base, B1_DYNAMIC,
+ B1_DYNAMIC, PCIE_PCS_OUT_VEC_4);
+ }
+
+ /* disable lane eq ctrl rx data hold */
+ artpec8_pcie_lane_control(phy, PCIE_PHY_TRSV_REG2C0,
+ LN_EQ_CTRL_RX_DATA_HOLD, 0);
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_exit(struct phy *phy)
+{
+ dev_dbg(&phy->dev, "phy exit\n");
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_reset(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, OV_I_CMN_RSTN,
+ 0, PCIE_PHY_CMN_REG101);
+ udelay(10);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, OV_I_CMN_RSTN,
+ OV_I_CMN_RSTN, PCIE_PHY_CMN_REG101);
+
+ dev_dbg(&phy->dev, "phy reset\n");
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_power_on(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_PWR_OFF, 0);
+
+ dev_dbg(&phy->dev, "phy power on\n");
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_power_off(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_PWR_OFF, PCIE_PHY_PWR_OFF);
+
+ dev_dbg(&phy->dev, "phy power off\n");
+
+ return 0;
+}
+
+static const struct phy_ops artpec8_phy_ops = {
+ .init = artpec8_pcie_phy_init,
+ .exit = artpec8_pcie_phy_exit,
+ .reset = artpec8_pcie_phy_reset,
+ .power_on = artpec8_pcie_phy_power_on,
+ .power_off = artpec8_pcie_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static const struct artpec8_pcie_phy_data artpec8_pcie_phy_data = {
+ .ops = &artpec8_phy_ops,
+};
+
+static const struct of_device_id artpec8_pcie_phy_match[] = {
+ {
+ .compatible = "axis,artpec8-pcie-phy",
+ .data = &artpec8_pcie_phy_data,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, artpec8_pcie_phy_match);
+
+static int artpec8_pcie_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct artpec8_pcie_phy *artpec8_phy;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ struct resource *res;
+ const struct artpec8_pcie_phy_data *drv_data;
+
+ drv_data = of_device_get_match_data(dev);
+ if (!drv_data)
+ return -ENODEV;
+
+ artpec8_phy = devm_kzalloc(dev, sizeof(*artpec8_phy), GFP_KERNEL);
+ if (!artpec8_phy)
+ return -ENOMEM;
+
+ /* reference clock */
+ if (of_property_read_u32(dev->of_node, "lcpll-ref-clk",
+ &artpec8_phy->lcpll_ref_clk)) {
+ dev_err(dev, "Failed selecting the lcpll-ref-clk\n");
+ return -EINVAL;
+ }
+ /* PLL SOC reference clock */
+ if (artpec8_phy->lcpll_ref_clk == REF_CLK_FROM_SOC_PLL) {
+ artpec8_phy->soc_pll_clk = devm_clk_get(dev, "ref_clk");
+ if (IS_ERR(artpec8_phy->soc_pll_clk)) {
+ dev_err(dev, "couldn't get reference clock\n");
+ return -EINVAL;
+ }
+ clk_prepare_enable(artpec8_phy->soc_pll_clk);
+ }
+
+ /* link mode */
+ if (of_property_read_string(dev->of_node, "mode", &artpec8_phy->mode)) {
+ dev_err(dev, "failed to get mode\n");
+ return -EINVAL;
+ }
+
+ /* number of lanes */
+ if (of_property_read_u32(dev->of_node, "num-lanes",
+ &artpec8_phy->num_lanes)) {
+ dev_err(dev, "failed to get num-lanes\n");
+ return -EINVAL;
+ }
+
+ if (artpec8_phy->num_lanes > LANE_MAX) {
+ dev_err(dev, "invalid num_lanes[%u]\n", artpec8_phy->num_lanes);
+ return -EINVAL;
+ }
+
+ /* PHY base register */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
+ artpec8_phy->phy_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(artpec8_phy->phy_base))
+ return PTR_ERR(artpec8_phy->phy_base);
+
+ /* PCS base register */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pcs");
+ artpec8_phy->pcs_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(artpec8_phy->pcs_base))
+ return PTR_ERR(artpec8_phy->pcs_base);
+
+ /* sysreg regmap handle, need to change using smc */
+ artpec8_phy->sysreg =
+ syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,fsys-sysreg");
+ if (IS_ERR(artpec8_phy->sysreg)) {
+ dev_err(dev, "fsys sysreg regmap lookup failed.\n");
+ return PTR_ERR(artpec8_phy->sysreg);
+ }
+
+ artpec8_phy->drv_data = drv_data;
+
+ generic_phy = devm_phy_create(dev, dev->of_node, drv_data->ops);
+ if (IS_ERR(generic_phy)) {
+ dev_err(dev, "failed to create PHY\n");
+ return PTR_ERR(generic_phy);
+ }
+
+ phy_set_drvdata(generic_phy, artpec8_phy);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+ if (IS_ERR(phy_provider)) {
+ dev_err(dev, "failed to register PHY provider\n");
+ return PTR_ERR(phy_provider);
+ }
+
+ /* Add FOM in debugfs */
+ debugfs_dir = debugfs_create_dir("pcie-phy", NULL);
+ debugfs_create_file("phy-fom", 0444, debugfs_dir,
+ generic_phy, &fom_fops);
+
+ dev_info(dev, "registered PCIe PHY\n");
+
+ return 0;
+}
+
+static int __exit artpec8_pcie_remove(struct platform_device *pdev)
+{
+ struct artpec8_pcie_phy *artpec8_phy = platform_get_drvdata(pdev);
+
+ /* Remove debugfs files for FOM values */
+ debugfs_remove_recursive(debugfs_dir);
+
+ if (artpec8_phy->soc_pll_clk)
+ clk_disable_unprepare(artpec8_phy->soc_pll_clk);
+
+ return 0;
+}
+
+static struct platform_driver artpec8_pcie_phy_driver = {
+ .probe = artpec8_pcie_phy_probe,
+ .remove = __exit_p(artpec8_pcie_phy_remove),
+ .driver = {
+ .of_match_table = artpec8_pcie_phy_match,
+ .name = "artpec8_pcie_phy",
+ }
+};
+
+module_platform_driver(artpec8_pcie_phy_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jaeho Cho <jaeho79.cho@...sung.com>");
--
2.9.5
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