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Message-ID: <20230607062500.24669-3-stanley_chang@realtek.com>
Date: Wed, 7 Jun 2023 14:24:39 +0800
From: Stanley Chang <stanley_chang@...ltek.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: Stanley Chang <stanley_chang@...ltek.com>,
Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Alan Stern <stern@...land.harvard.edu>,
Ray Chi <raychi@...gle.com>,
Michael Grzeschik <m.grzeschik@...gutronix.de>,
"Flavio Suligoi" <f.suligoi@...m.it>,
Matthias Kaehlcke <mka@...omium.org>,
"Mathias Nyman" <mathias.nyman@...ux.intel.com>,
<linux-phy@...ts.infradead.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: [PATCH v3 3/5] phy: realtek: usb: Add driver for the Realtek SoC USB 3.0 PHY
Realtek DHC (digital home center) RTD SoCs support DWC3 XHCI USB
controller. Added the driver to drive the USB 3.0 PHY transceivers.
Signed-off-by: Stanley Chang <stanley_chang@...ltek.com>
---
v2 to v3 change:
1. Broken down into two patches, one for each of USB 2 & 3 PHY.
2. Removed parameter v1 support for simplification.
3. Used remove_new for driver remove callback.
v1 to v2 change:
1. Move the drivers to drivers/phy/ for generic phy driver
2. Use the generic phy driver api to initialize phy
3. Use readl/writel to instead phy_read/phy_write directly.
4. Use read_poll_timeout() in function utmi_wait_register.
5. Revised some coding styles.
6. fix the compiler warning for kernel test robot.
---
drivers/phy/realtek/Kconfig | 10 +
drivers/phy/realtek/Makefile | 1 +
drivers/phy/realtek/phy-rtk-usb3.c | 1070 ++++++++++++++++++++++++++++
3 files changed, 1081 insertions(+)
create mode 100644 drivers/phy/realtek/phy-rtk-usb3.c
diff --git a/drivers/phy/realtek/Kconfig b/drivers/phy/realtek/Kconfig
index 76e31f6abdee..28ee3d9be568 100644
--- a/drivers/phy/realtek/Kconfig
+++ b/drivers/phy/realtek/Kconfig
@@ -11,3 +11,13 @@ config PHY_RTK_RTD_USB2PHY
The DHC (digital home center) RTD series SoCs used the Synopsys
DWC3 USB IP. This driver will do the PHY initialization
of the parameters.
+
+config PHY_RTK_RTD_USB3PHY
+ tristate "Realtek RTD USB3 PHY Transceiver Driver"
+ select GENERIC_PHY
+ select USB_PHY
+ help
+ Enable this to support Realtek SoC USB3 phy transceiver.
+ The DHC (digital home center) RTD series SoCs used the Synopsys
+ DWC3 USB IP. This driver will do the PHY initialization
+ of the parameters.
diff --git a/drivers/phy/realtek/Makefile b/drivers/phy/realtek/Makefile
index cf5d440841a2..ed7b47ff8a26 100644
--- a/drivers/phy/realtek/Makefile
+++ b/drivers/phy/realtek/Makefile
@@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PHY_RTK_RTD_USB2PHY) += phy-rtk-usb2.o
+obj-$(CONFIG_PHY_RTK_RTD_USB3PHY) += phy-rtk-usb3.o
diff --git a/drivers/phy/realtek/phy-rtk-usb3.c b/drivers/phy/realtek/phy-rtk-usb3.c
new file mode 100644
index 000000000000..aae0525ce78d
--- /dev/null
+++ b/drivers/phy/realtek/phy-rtk-usb3.c
@@ -0,0 +1,1070 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * phy-rtk-usb3.c RTK usb3.0 phy driver
+ *
+ * copyright (c) 2023 realtek semiconductor corporation
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/regmap.h>
+#include <linux/sys_soc.h>
+#include <linux/mfd/syscon.h>
+#include <linux/phy/phy.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/phy.h>
+
+#define USB_MDIO_CTRL_PHY_BUSY BIT(7)
+#define USB_MDIO_CTRL_PHY_WRITE BIT(0)
+#define USB_MDIO_CTRL_PHY_ADDR_SHIFT 8
+#define USB_MDIO_CTRL_PHY_DATA_SHIFT 16
+
+#define MAX_USB_PHY_DATA_SIZE 0x30
+#define PHY_ADDR_0x09 0x09
+#define PHY_ADDR_0x0B 0x0B
+#define PHY_ADDR_0x0D 0x0D
+#define PHY_ADDR_0x10 0x10
+#define PHY_ADDR_0x1F 0x1F
+#define PHY_ADDR_0x20 0x20
+#define PHY_ADDR_0x30 0x30
+
+#define REG_0x0B_RX_OFFSET_RANGE_MASK 0xC
+#define REG_0x0D_RX_DEBUG_TEST_EN BIT(6)
+#define REG_0x10_DEBUG_MODE_SETTING 0x3C0
+#define REG_0x10_DEBUG_MODE_SETTING_MASK 0x3F8
+#define REG_0x1F_RX_OFFSET_CODE_MASK 0x1E
+
+#define USB_U3_TX_LFPS_SWING_TRIM_SHIFT 4
+#define USB_U3_TX_LFPS_SWING_TRIM_MASK 0xF
+
+#define PHY_ADDR_MAP_ARRAY_INDEX(addr) (addr)
+#define ARRAY_INDEX_MAP_PHY_ADDR(index) (index)
+
+struct reg_addr {
+ void __iomem *reg_mdio_ctl;
+};
+
+struct phy_parameter {
+ u8 addr;
+ u16 data;
+};
+
+struct phy_data {
+ int size;
+ struct phy_parameter *parameter;
+
+ bool check_efuse;
+ u8 efuse_usb_u3_tx_lfps_swing_trim;
+ bool do_toggle;
+ bool do_toggle_once;
+ bool use_default_parameter;
+ bool check_rx_front_end_offset;
+};
+
+struct rtk_usb_phy {
+ struct usb_phy phy;
+ struct device *dev;
+
+ int phyN;
+ void *reg_addr;
+ void *phy_data;
+
+ struct dentry *debug_dir;
+};
+
+#define PHY_IO_TIMEOUT_USEC (50000)
+#define PHY_IO_DELAY_US (100)
+
+static inline int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
+{
+ int ret;
+ unsigned int val;
+
+ ret = read_poll_timeout(readl, val, ((val & mask) == result),
+ PHY_IO_DELAY_US, PHY_IO_TIMEOUT_USEC, false, reg);
+ if (ret) {
+ pr_err("%s can't program USB phy\n", __func__);
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int rtk_usb_phy3_wait_vbusy(struct reg_addr *regAddr)
+{
+ return utmi_wait_register(regAddr->reg_mdio_ctl, USB_MDIO_CTRL_PHY_BUSY, 0);
+}
+
+static u16 rtk_usb_phy_read(struct reg_addr *regAddr, char addr)
+{
+ unsigned int regVal;
+ u32 value;
+
+ regVal = (addr << USB_MDIO_CTRL_PHY_ADDR_SHIFT);
+
+ writel(regVal, regAddr->reg_mdio_ctl);
+
+ rtk_usb_phy3_wait_vbusy(regAddr);
+
+ value = readl(regAddr->reg_mdio_ctl);
+ value = value >> USB_MDIO_CTRL_PHY_DATA_SHIFT;
+
+ return (u16)value;
+}
+
+static int rtk_usb_phy_write(struct reg_addr *regAddr, char addr, u16 data)
+{
+ unsigned int regVal;
+
+ regVal = USB_MDIO_CTRL_PHY_WRITE |
+ (addr << USB_MDIO_CTRL_PHY_ADDR_SHIFT) |
+ (data << USB_MDIO_CTRL_PHY_DATA_SHIFT);
+
+ writel(regVal, regAddr->reg_mdio_ctl);
+
+ rtk_usb_phy3_wait_vbusy(regAddr);
+
+ return 0;
+}
+
+static void do_rtk_usb3_phy_toggle(struct rtk_usb_phy *rtk_phy, int i,
+ bool isConnect)
+{
+ struct reg_addr *regAddr;
+ struct phy_data *phy_data;
+ struct phy_parameter *phy_parameter;
+ size_t index;
+
+ regAddr = &((struct reg_addr *)rtk_phy->reg_addr)[i];
+ phy_data = &((struct phy_data *)rtk_phy->phy_data)[i];
+
+ if (!phy_data) {
+ dev_err(rtk_phy->dev, "%s phy_data is NULL!\n", __func__);
+ return;
+ }
+
+ if (!phy_data->do_toggle)
+ return;
+
+ phy_parameter = phy_data->parameter;
+
+ index = PHY_ADDR_MAP_ARRAY_INDEX(PHY_ADDR_0x09);
+
+ if (index < phy_data->size) {
+ u8 addr = (phy_parameter + index)->addr;
+ u16 data = (phy_parameter + index)->data;
+
+ if (addr == 0xFF) {
+ addr = ARRAY_INDEX_MAP_PHY_ADDR(index);
+ data = rtk_usb_phy_read(regAddr, addr);
+ (phy_parameter + index)->addr = addr;
+ (phy_parameter + index)->data = data;
+ }
+ mdelay(1);
+ dev_info(rtk_phy->dev,
+ "%s ########## to toggle PHY addr 0x09 BIT(9)\n",
+ __func__);
+ rtk_usb_phy_write(regAddr, addr, data&(~BIT(9)));
+ mdelay(1);
+ rtk_usb_phy_write(regAddr, addr, data);
+ }
+ dev_info(rtk_phy->dev, "%s ########## PHY addr 0x1f = 0x%04x\n",
+ __func__, rtk_usb_phy_read(regAddr, PHY_ADDR_0x1F));
+}
+
+static int do_rtk_usb_phy_init(struct rtk_usb_phy *rtk_phy, int phy_index)
+{
+ struct reg_addr *regAddr =
+ &((struct reg_addr *)rtk_phy->reg_addr)[phy_index];
+ struct phy_data *phy_data =
+ &((struct phy_data *)rtk_phy->phy_data)[phy_index];
+ int index = 0;
+ struct phy_parameter *phy_parameter = phy_data->parameter;
+
+ dev_dbg(rtk_phy->dev, "%s: init phy#%d\n", __func__, phy_index);
+
+ if (phy_data->use_default_parameter) {
+ dev_info(rtk_phy->dev, "%s phy#%d use default parameter\n",
+ __func__, phy_index);
+ goto do_toggle;
+ }
+
+ for (index = 0; index < phy_data->size; index++) {
+ u8 addr = (phy_parameter + index)->addr;
+ u16 data = (phy_parameter + index)->data;
+
+ if (addr == 0xFF)
+ continue;
+
+ if (addr == PHY_ADDR_0x20) {
+ u8 efuse_val = phy_data->efuse_usb_u3_tx_lfps_swing_trim;
+ u16 val_mask = USB_U3_TX_LFPS_SWING_TRIM_MASK;
+ int val_shift = USB_U3_TX_LFPS_SWING_TRIM_SHIFT;
+
+ if (efuse_val) {
+ data &= ~(val_mask << val_shift);
+ data |= ((efuse_val & val_mask) << val_shift);
+ }
+ }
+
+ rtk_usb_phy_write(regAddr, addr, data);
+ }
+
+ for (index = 0; index < phy_data->size; index++) {
+ u8 addr = (phy_parameter + index)->addr;
+ u16 data = (phy_parameter + index)->data;
+
+ if (addr == 0xFF)
+ continue;
+
+ dev_dbg(rtk_phy->dev, "[USB3_PHY], addr = 0x%02x, data = 0x%04x ==> read value = 0x%04x\n",
+ addr, data,
+ rtk_usb_phy_read(regAddr, addr));
+ }
+
+do_toggle:
+ if (phy_data->do_toggle_once)
+ phy_data->do_toggle = true;
+
+ do_rtk_usb3_phy_toggle(rtk_phy, phy_index, false);
+
+ if (phy_data->do_toggle_once) {
+ u16 check_value = 0;
+ int count = 10;
+ u16 value_0x0D, value_0x10;
+
+ /* Enable Debug mode by set 0x0D and 0x10 */
+ value_0x0D = rtk_usb_phy_read(regAddr, PHY_ADDR_0x0D);
+ value_0x10 = rtk_usb_phy_read(regAddr, PHY_ADDR_0x10);
+
+ rtk_usb_phy_write(regAddr, PHY_ADDR_0x0D,
+ value_0x0D | REG_0x0D_RX_DEBUG_TEST_EN);
+ rtk_usb_phy_write(regAddr, PHY_ADDR_0x10,
+ (value_0x10 & ~REG_0x10_DEBUG_MODE_SETTING_MASK) |
+ REG_0x10_DEBUG_MODE_SETTING);
+
+ check_value = rtk_usb_phy_read(regAddr, PHY_ADDR_0x30);
+
+ while (!(check_value & BIT(15))) {
+ check_value = rtk_usb_phy_read(regAddr, PHY_ADDR_0x30);
+ mdelay(1);
+ if (count-- < 0)
+ break;
+ }
+
+ if (!(check_value & BIT(15)))
+ dev_info(rtk_phy->dev, "toggle fail addr=0x%02x, data=0x%04x\n",
+ PHY_ADDR_0x30, check_value);
+ else
+ dev_info(rtk_phy->dev, "toggle okay addr=0x%02x, data=0x%04x\n",
+ PHY_ADDR_0x30, check_value);
+
+ /* Disable Debug mode by set 0x0D and 0x10 to default*/
+ rtk_usb_phy_write(regAddr, PHY_ADDR_0x0D, value_0x0D);
+ rtk_usb_phy_write(regAddr, PHY_ADDR_0x10, value_0x10);
+
+ phy_data->do_toggle = false;
+ }
+
+
+ if (phy_data->check_rx_front_end_offset) {
+ u16 rx_offset_code, rx_offset_range;
+ bool do_update = false;
+
+ rx_offset_code = rtk_usb_phy_read(regAddr, PHY_ADDR_0x1F);
+ if (((rx_offset_code & REG_0x1F_RX_OFFSET_CODE_MASK) == 0x0) ||
+ ((rx_offset_code & REG_0x1F_RX_OFFSET_CODE_MASK) ==
+ REG_0x1F_RX_OFFSET_CODE_MASK))
+ do_update = true;
+
+ rx_offset_range = rtk_usb_phy_read(regAddr, PHY_ADDR_0x0B);
+ if (((rx_offset_range & REG_0x0B_RX_OFFSET_RANGE_MASK) ==
+ REG_0x0B_RX_OFFSET_RANGE_MASK) && do_update) {
+ dev_warn(rtk_phy->dev, "Don't update rx_offset_range (rx_offset_code=0x%x, rx_offset_range=0x%x)\n",
+ rx_offset_code, rx_offset_range);
+ do_update = false;
+ }
+
+ if (do_update) {
+ u16 tmp1, tmp2;
+
+ tmp1 = rx_offset_range & (~REG_0x0B_RX_OFFSET_RANGE_MASK);
+ tmp2 = rx_offset_range & REG_0x0B_RX_OFFSET_RANGE_MASK;
+ tmp2 += (1 << 2);
+ rx_offset_range = tmp1 | (tmp2 & REG_0x0B_RX_OFFSET_RANGE_MASK);
+ rtk_usb_phy_write(regAddr, PHY_ADDR_0x0B, rx_offset_range);
+ goto do_toggle;
+ }
+ }
+
+ return 0;
+}
+
+static int rtk_usb_phy_init(struct phy *phy)
+{
+ struct rtk_usb_phy *rtk_phy = phy_get_drvdata(phy);
+ int ret = 0;
+ int i;
+ unsigned long phy_init_time = jiffies;
+
+ if (!rtk_phy) {
+ pr_err("%s rtk_phy is NULL!\n", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(rtk_phy->dev, "Init RTK USB 3.0 PHY\n");
+ for (i = 0; i < rtk_phy->phyN; i++)
+ ret = do_rtk_usb_phy_init(rtk_phy, i);
+
+ dev_info(rtk_phy->dev, "Initialized RTK USB 3.0 PHY (take %dms)\n",
+ jiffies_to_msecs(jiffies - phy_init_time));
+ return ret;
+}
+
+static int rtk_usb_phy_exit(struct phy *phy)
+{
+ struct rtk_usb_phy *rtk_phy = phy_get_drvdata(phy);
+
+ if (!rtk_phy) {
+ pr_err("%s rtk_phy is NULL!\n", __func__);
+ return -ENODEV;
+ }
+
+ dev_dbg(rtk_phy->dev, "Exit RTK USB 3.0 PHY\n");
+
+ return 0;
+}
+
+static const struct phy_ops ops = {
+ .init = rtk_usb_phy_init,
+ .exit = rtk_usb_phy_exit,
+ .owner = THIS_MODULE,
+};
+
+static void rtk_usb_phy_toggle(struct usb_phy *usb3_phy, bool isConnect, int port)
+{
+ int index = port;
+ struct rtk_usb_phy *rtk_phy = NULL;
+
+ if (usb3_phy != NULL && usb3_phy->dev != NULL)
+ rtk_phy = dev_get_drvdata(usb3_phy->dev);
+
+ if (rtk_phy == NULL) {
+ pr_err("%s ERROR! NO this device\n", __func__);
+ return;
+ }
+
+ if (index > rtk_phy->phyN) {
+ pr_err("%s %d ERROR! port=%d > phyN=%d\n",
+ __func__, __LINE__, index, rtk_phy->phyN);
+ return;
+ }
+
+ do_rtk_usb3_phy_toggle(rtk_phy, index, isConnect);
+}
+
+static int rtk_usb_phy_notify_port_status(struct usb_phy *x, int port,
+ u16 portstatus, u16 portchange)
+{
+ bool isConnect = false;
+
+ pr_debug("%s port=%d portstatus=0x%x portchange=0x%x\n",
+ __func__, port, (int)portstatus, (int)portchange);
+ if (portstatus & USB_PORT_STAT_CONNECTION)
+ isConnect = true;
+
+ if (portchange & USB_PORT_STAT_C_CONNECTION)
+ rtk_usb_phy_toggle(x, isConnect, port);
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static struct dentry *create_phy_debug_root(void)
+{
+ struct dentry *phy_debug_root;
+
+ phy_debug_root = debugfs_lookup("phy", usb_debug_root);
+ if (!phy_debug_root) {
+ phy_debug_root = debugfs_create_dir("phy", usb_debug_root);
+ if (!phy_debug_root)
+ pr_err("%s Error phy_debug_root is NULL\n", __func__);
+ else
+ pr_debug("%s Create phy_debug_root folder\n", __func__);
+ }
+
+ return phy_debug_root;
+}
+
+static int rtk_usb3_parameter_show(struct seq_file *s, void *unused)
+{
+ struct rtk_usb_phy *rtk_phy = s->private;
+ int i, index;
+
+ for (i = 0; i < rtk_phy->phyN; i++) {
+ struct reg_addr *regAddr =
+ &((struct reg_addr *)rtk_phy->reg_addr)[i];
+ struct phy_data *phy_data =
+ &((struct phy_data *)rtk_phy->phy_data)[i];
+ struct phy_parameter *phy_parameter;
+
+ phy_parameter = phy_data->parameter;
+
+ seq_printf(s, "[USB3_PHY] PHY %d\n", i);
+
+ for (index = 0; index < phy_data->size; index++) {
+ u8 addr = ARRAY_INDEX_MAP_PHY_ADDR(index);
+ u16 data = (phy_parameter + index)->data;
+
+ if ((phy_parameter + index)->addr == 0xFF)
+ seq_printf(s, "[USB3_PHY], addr = 0x%02x, data = none ==> read value = 0x%04x\n",
+ addr,
+ rtk_usb_phy_read(regAddr, addr));
+ else
+ seq_printf(s, "[USB3_PHY], addr = 0x%02x, data = 0x%04x ==> read value = 0x%04x\n",
+ addr, data,
+ rtk_usb_phy_read(regAddr, addr));
+ }
+
+ seq_puts(s, "Property:\n");
+ seq_printf(s, "check_efuse: %s\n",
+ phy_data->check_efuse?"Enable":"Disable");
+ seq_printf(s, "efuse_usb_u3_tx_lfps_swing_trim: 0x%x\n",
+ (int)phy_data->efuse_usb_u3_tx_lfps_swing_trim);
+ seq_printf(s, "do_toggle: %s\n",
+ phy_data->do_toggle?"Enable":"Disable");
+ seq_printf(s, "do_toggle_once: %s\n",
+ phy_data->do_toggle_once?"Enable":"Disable");
+ seq_printf(s, "use_default_parameter: %s\n",
+ phy_data->use_default_parameter?"Enable":"Disable");
+ }
+ return 0;
+}
+
+static int rtk_usb3_parameter_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rtk_usb3_parameter_show, inode->i_private);
+}
+
+static const struct file_operations rtk_usb3_parameter_fops = {
+ .open = rtk_usb3_parameter_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __get_parameter_at_page(struct seq_file *s,
+ struct rtk_usb_phy *rtk_phy,
+ struct phy_parameter *phy_parameter_array,
+ const char *phy_addr)
+{
+ struct phy_parameter *phy_parameter;
+ uint32_t addr;
+ int i, ret;
+
+ ret = kstrtouint(phy_addr, 16, &addr);
+ if (ret < 0) {
+ pr_err("%s::kstrtouint() failed\n", __func__);
+ return -EINVAL;
+ }
+
+ i = PHY_ADDR_MAP_ARRAY_INDEX(addr);
+ phy_parameter = (phy_parameter_array + i);
+
+ if (phy_parameter->addr != 0xFF)
+ seq_printf(s, "Now Parameter addr 0x%02x = 0x%04x\n",
+ phy_parameter->addr, phy_parameter->data);
+ else
+ seq_printf(s, "Now Parameter addr 0x%02x is default\n",
+ addr);
+
+ dev_dbg(rtk_phy->dev, "%s addr=0x%02x data=0x%04x\n",
+ __func__, phy_parameter->addr, phy_parameter->data);
+
+ return 0;
+}
+
+static int __set_parameter_at_page(
+ struct rtk_usb_phy *rtk_phy,
+ struct reg_addr *regAddr, struct phy_data *phy_data,
+ struct phy_parameter *phy_parameter_array,
+ const char *phy_addr, const char *phy_value)
+{
+ struct phy_parameter *phy_parameter;
+ uint32_t addr, value;
+ int i, ret;
+
+ ret = kstrtouint(phy_addr, 16, &addr);
+ if (ret < 0) {
+ pr_err("%s::kstrtouint() failed\n", __func__);
+ return -EINVAL;
+ }
+ ret = kstrtouint(phy_value, 16, &value);
+ if (ret < 0) {
+ pr_err("%s::kstrtouint() failed\n", __func__);
+ return -EINVAL;
+ }
+
+ i = PHY_ADDR_MAP_ARRAY_INDEX(addr);
+ phy_parameter = (phy_parameter_array + i);
+
+ if (phy_parameter->addr != 0xFF) {
+ phy_parameter->data = value;
+ } else {
+ phy_parameter->addr = addr;
+ phy_parameter->data = value;
+ }
+
+ dev_info(rtk_phy->dev, "%s addr=0x%02x data=0x%04x\n",
+ __func__, phy_parameter->addr, phy_parameter->data);
+
+ if (addr == PHY_ADDR_0x20)
+ dev_info(rtk_phy->dev,
+ "%s PHY_ADDR_0x20 NOT use efuse u3_tx_lfps_swing_trim value\n",
+ __func__);
+
+ if (rtk_usb_phy_write(regAddr, addr, value))
+ dev_err(rtk_phy->dev,
+ "[%s:%d] Error: addr=0x%02x value=0x%04x\n",
+ __func__, __LINE__, addr, value);
+
+ return 0;
+}
+
+static int rtk_usb3_set_parameter_show(struct seq_file *s, void *unused)
+{
+ struct rtk_usb_phy *rtk_phy = s->private;
+ const struct file *file = s->file;
+ const char *file_name = file_dentry(file)->d_iname;
+ struct dentry *p_dentry = file_dentry(file)->d_parent;
+ const char *phy_dir_name = p_dentry->d_iname;
+ int ret, index;
+ struct phy_data *phy_data = NULL;
+
+ for (index = 0; index < rtk_phy->phyN; index++) {
+ size_t sz = 30;
+ char name[30] = {0};
+
+ snprintf(name, sz, "phy%d", index);
+ if (strncmp(name, phy_dir_name, strlen(name)) == 0) {
+ phy_data = &((struct phy_data *)rtk_phy->phy_data)[index];
+ break;
+ }
+ }
+ if (!phy_data) {
+ dev_err(rtk_phy->dev,
+ "%s: No phy_data for %s/%s\n",
+ __func__, phy_dir_name, file_name);
+ return -EINVAL;
+ }
+
+ ret = __get_parameter_at_page(s, rtk_phy, phy_data->parameter, file_name);
+ if (ret < 0)
+ return ret;
+
+ seq_puts(s, "Set phy parameter by following command\n");
+ seq_printf(s, "echo \"value\" > %s/%s\n",
+ phy_dir_name, file_name);
+
+ return 0;
+}
+
+static int rtk_usb3_set_parameter_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rtk_usb3_set_parameter_show, inode->i_private);
+}
+
+static ssize_t rtk_usb3_set_parameter_write(struct file *file,
+ const char __user *ubuf, size_t count, loff_t *ppos)
+{
+ const char *file_name = file_dentry(file)->d_iname;
+ struct dentry *p_dentry = file_dentry(file)->d_parent;
+ const char *phy_dir_name = p_dentry->d_iname;
+ struct seq_file *s = file->private_data;
+ struct rtk_usb_phy *rtk_phy = s->private;
+ struct reg_addr *regAddr = NULL;
+ struct phy_data *phy_data = NULL;
+ int ret = 0;
+ char buffer[40] = {0};
+ int index;
+
+ if (copy_from_user(&buffer, ubuf,
+ min_t(size_t, sizeof(buffer) - 1, count)))
+ return -EFAULT;
+
+ for (index = 0; index < rtk_phy->phyN; index++) {
+ size_t sz = 30;
+ char name[30] = {0};
+
+ snprintf(name, sz, "phy%d", index);
+ if (strncmp(name, phy_dir_name, strlen(name)) == 0) {
+ regAddr = &((struct reg_addr *)rtk_phy->reg_addr)[index];
+ phy_data = &((struct phy_data *)rtk_phy->phy_data)[index];
+ break;
+ }
+ }
+ if (!regAddr) {
+ dev_err(rtk_phy->dev,
+ "%s: No regAddr for %s/%s\n",
+ __func__, phy_dir_name, file_name);
+ return -EINVAL;
+ }
+ if (!phy_data) {
+ dev_err(rtk_phy->dev,
+ "%s: No phy_data for %s/%s\n",
+ __func__, phy_dir_name, file_name);
+ return -EINVAL;
+ }
+
+ ret = __set_parameter_at_page(rtk_phy, regAddr, phy_data,
+ phy_data->parameter, file_name, buffer);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static const struct file_operations rtk_usb3_set_parameter_fops = {
+ .open = rtk_usb3_set_parameter_open,
+ .write = rtk_usb3_set_parameter_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int rtk_usb3_toggle_show(struct seq_file *s, void *unused)
+{
+ struct rtk_usb_phy *rtk_phy = s->private;
+ struct phy_data *phy_data;
+ int i;
+
+ for (i = 0; i < rtk_phy->phyN; i++) {
+ phy_data = &((struct phy_data *)rtk_phy->phy_data)[i];
+ seq_printf(s, "Now phy#%d do_toggle is %s.\n",
+ i, phy_data->do_toggle?"Enable":"Disable");
+ }
+ seq_puts(s, "ehco 1 to enable toggle phy parameter.\n");
+
+ return 0;
+}
+
+static int rtk_usb3_toggle_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, rtk_usb3_toggle_show, inode->i_private);
+}
+
+static ssize_t rtk_usb3_toggle_write(struct file *file,
+ const char __user *ubuf, size_t count, loff_t *ppos)
+{
+ struct seq_file *s = file->private_data;
+ struct rtk_usb_phy *rtk_phy = s->private;
+ char buf[32];
+ struct phy_data *phy_data;
+ bool enable = false;
+ int i;
+
+ if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+ return -EFAULT;
+
+ if (!strncmp(buf, "1", 1))
+ enable = true;
+
+ for (i = 0; i < rtk_phy->phyN; i++) {
+ phy_data = &((struct phy_data *)rtk_phy->phy_data)[i];
+ phy_data->do_toggle = enable;
+ dev_info(rtk_phy->dev, "Set phy#%d do_toggle is %s.\n",
+ i, phy_data->do_toggle?"Enable":"Disable");
+ }
+
+ return count;
+}
+
+static const struct file_operations rtk_usb3_toggle_fops = {
+ .open = rtk_usb3_toggle_open,
+ .write = rtk_usb3_toggle_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int create_debug_set_parameter_files(struct rtk_usb_phy *rtk_phy,
+ struct dentry *phy_dir, size_t addr_size)
+{
+ int i;
+
+ for (i = 0; i < addr_size; i++) {
+ size_t sz = 30;
+ char name[30] = {0};
+
+ snprintf(name, sz, "%02x", ARRAY_INDEX_MAP_PHY_ADDR(i));
+
+ if (!debugfs_create_file(name, 0644,
+ phy_dir, rtk_phy,
+ &rtk_usb3_set_parameter_fops))
+ dev_err(rtk_phy->dev,
+ "%s Error create file %s fail",
+ name, __func__);
+ }
+
+ return 0;
+}
+
+static inline void create_debug_files(struct rtk_usb_phy *rtk_phy)
+{
+ struct dentry *phy_debug_root = NULL;
+ struct dentry *set_parameter_dir = NULL;
+
+ phy_debug_root = create_phy_debug_root();
+
+ if (!phy_debug_root) {
+ dev_err(rtk_phy->dev, "%s Error phy_debug_root is NULL",
+ __func__);
+ return;
+ }
+ rtk_phy->debug_dir = debugfs_create_dir(dev_name(rtk_phy->dev),
+ phy_debug_root);
+ if (!rtk_phy->debug_dir) {
+ dev_err(rtk_phy->dev, "%s Error debug_dir is NULL", __func__);
+ return;
+ }
+
+ if (!debugfs_create_file("parameter", 0444,
+ rtk_phy->debug_dir, rtk_phy,
+ &rtk_usb3_parameter_fops))
+ goto file_error;
+
+ set_parameter_dir = debugfs_create_dir("set_parameter",
+ rtk_phy->debug_dir);
+ if (set_parameter_dir) {
+ int index, ret;
+
+ for (index = 0; index < rtk_phy->phyN; index++) {
+ struct dentry *phy_dir;
+ struct phy_data *phy_data;
+ size_t sz = 30;
+ char name[30] = {0};
+
+ snprintf(name, sz, "phy%d", index);
+
+ phy_data = &((struct phy_data *)rtk_phy->phy_data)[index];
+
+ phy_dir = debugfs_create_dir(name, set_parameter_dir);
+ if (!phy_dir) {
+ dev_err(rtk_phy->dev,
+ "%s Error create folder %s fail\n",
+ name, __func__);
+ goto file_error;
+ }
+
+ ret = create_debug_set_parameter_files(rtk_phy, phy_dir,
+ phy_data->size);
+ if (ret < 0) {
+ dev_err(rtk_phy->dev,
+ "%s Error create files fail\n",
+ __func__);
+ goto file_error;
+ }
+ }
+ }
+
+ if (!debugfs_create_file("toggle", 0644, rtk_phy->debug_dir, rtk_phy,
+ &rtk_usb3_toggle_fops))
+ goto file_error;
+
+ return;
+
+file_error:
+ debugfs_remove_recursive(rtk_phy->debug_dir);
+}
+
+static inline void remove_debug_files(struct rtk_usb_phy *rtk_phy)
+{
+ debugfs_remove_recursive(rtk_phy->debug_dir);
+}
+#else
+static inline void create_debug_files(struct rtk_usb_phy *rtk_phy) { }
+static inline void remove_debug_files(struct rtk_usb_phy *rtk_phy) { }
+#endif /* CONFIG_DEBUG_FS */
+
+static int __get_phy_parameter_by_efuse(struct rtk_usb_phy *rtk_phy,
+ struct phy_data *phy_data, int index)
+{
+ u8 value = 0;
+ struct nvmem_cell *cell;
+
+ if (!phy_data->check_efuse)
+ goto out;
+
+ cell = nvmem_cell_get(rtk_phy->dev, "usb_u3_tx_lfps_swing_trim");
+ if (IS_ERR(cell)) {
+ dev_warn(rtk_phy->dev,
+ "%s failed to get usb_u3_tx_lfps_swing_trim: %ld\n",
+ __func__, PTR_ERR(cell));
+ } else {
+ unsigned char *buf;
+ size_t buf_size;
+
+ buf = nvmem_cell_read(cell, &buf_size);
+
+ value = buf[0] & USB_U3_TX_LFPS_SWING_TRIM_MASK;
+
+ dev_dbg(rtk_phy->dev,
+ "phy index=%d buf=0x%x buf_size=%d value=0x%x\n",
+ index, buf[0], (int)buf_size, value);
+ kfree(buf);
+ nvmem_cell_put(cell);
+ }
+
+ if ((value > 0) && (value < 0x8))
+ phy_data->efuse_usb_u3_tx_lfps_swing_trim = 0x8;
+ else
+ phy_data->efuse_usb_u3_tx_lfps_swing_trim = (u8)value;
+
+ dev_dbg(rtk_phy->dev, "Get Efuse usb_u3_tx_lfps_swing_trim=0x%x (value=0x%x)\n",
+ phy_data->efuse_usb_u3_tx_lfps_swing_trim, value);
+
+out:
+ return 0;
+}
+
+static int __get_phy_parameter(struct device *dev, struct phy_data *phy_data,
+ struct device_node *sub_node)
+{
+ struct phy_parameter *phy_parameter;
+ int i, ret = 0;
+ int data_size, num_cells = 2;
+
+ phy_data->size = MAX_USB_PHY_DATA_SIZE;
+ phy_data->parameter = devm_kzalloc(dev,
+ sizeof(struct phy_parameter) * phy_data->size, GFP_KERNEL);
+ if (!phy_data->parameter)
+ return -ENOMEM;
+
+ if (!of_get_property(sub_node, "realtek,param", &data_size)) {
+ dev_dbg(dev, "%s No parameter (data_size=%d)\n",
+ __func__, data_size);
+ data_size = 0;
+ }
+
+ if (!data_size)
+ goto out;
+
+ phy_parameter = phy_data->parameter;
+ /* Set default addr to 0xff for no data case */
+ for (i = 0; i < phy_data->size; i++)
+ (phy_parameter + i)->addr = 0xFF;
+
+ data_size = data_size / (sizeof(u32) * num_cells);
+ for (i = 0; i < data_size; i++) {
+ struct phy_parameter *parameter;
+ u32 addr, data;
+ int offset, index;
+
+ offset = i * num_cells;
+
+ ret = of_property_read_u32_index(sub_node, "realtek,param",
+ offset, &addr);
+ if (ret) {
+ dev_err(dev, "ERROR: To get param i=%d addr=0x%x\n",
+ i, addr);
+ break;
+ }
+
+ ret = of_property_read_u32_index(sub_node, "realtek,param",
+ offset + 1, &data);
+ if (ret) {
+ dev_err(dev, "ERROR: To get param i=%d addr=0x%x\n",
+ i, data);
+ break;
+ }
+
+ index = PHY_ADDR_MAP_ARRAY_INDEX(addr);
+ parameter = (phy_parameter + index);
+ parameter->addr = (u8)addr;
+ parameter->data = (u16)data;
+
+ dev_dbg(dev, "param index=%d addr=0x%x data=0x%x\n", index,
+ parameter->addr, parameter->data);
+ }
+
+out:
+ return ret;
+}
+
+static int get_phy_parameter(struct rtk_usb_phy *rtk_phy,
+ struct device_node *sub_node)
+{
+ struct device *dev = rtk_phy->dev;
+ struct reg_addr *addr;
+ struct phy_data *phy_data;
+ int ret = 0;
+ int index;
+
+ if (of_property_read_u32(sub_node, "reg", &index)) {
+ dev_err(dev, "sub_node without reg\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "sub_node index=%d\n", index);
+
+ addr = &((struct reg_addr *)rtk_phy->reg_addr)[index];
+ phy_data = &((struct phy_data *)rtk_phy->phy_data)[index];
+
+ addr->reg_mdio_ctl = of_iomap(dev->of_node, 0) + index;
+ dev_dbg(dev, "%s %d #%d reg_mdio_ctl=%p\n",
+ __func__, __LINE__, index, addr->reg_mdio_ctl);
+
+ if (!sub_node) {
+ dev_err(dev, "%s %d No device sub node\n", __func__, __LINE__);
+ goto err;
+ }
+
+ ret = __get_phy_parameter(dev, phy_data, sub_node);
+ if (ret)
+ goto err;
+
+ if (of_property_read_bool(sub_node, "realtek,do-toggle-once"))
+ phy_data->do_toggle_once = true;
+ else
+ phy_data->do_toggle_once = false;
+
+ if (of_property_read_bool(sub_node, "realtek,do-toggle"))
+ phy_data->do_toggle = true;
+ else
+ phy_data->do_toggle = false;
+
+ if (of_property_read_bool(sub_node, "realtek,use-default-parameter"))
+ phy_data->use_default_parameter = true;
+ else
+ phy_data->use_default_parameter = false;
+
+ if (of_property_read_bool(sub_node, "realtek,check-rx-front-end-offset"))
+ phy_data->check_rx_front_end_offset = true;
+ else
+ phy_data->check_rx_front_end_offset = false;
+
+ if (of_property_read_bool(sub_node, "realtek,check-efuse"))
+ phy_data->check_efuse = true;
+ else
+ phy_data->check_efuse = false;
+
+ __get_phy_parameter_by_efuse(rtk_phy, phy_data, index);
+
+err:
+ return ret;
+}
+
+static int rtk_usb3phy_probe(struct platform_device *pdev)
+{
+ struct rtk_usb_phy *rtk_phy;
+ struct device *dev = &pdev->dev;
+ struct device_node *node;
+ struct device_node *sub_node;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ int ret, phyN;
+
+ rtk_phy = devm_kzalloc(dev, sizeof(*rtk_phy), GFP_KERNEL);
+ if (!rtk_phy)
+ return -ENOMEM;
+
+ rtk_phy->dev = &pdev->dev;
+ rtk_phy->phy.dev = rtk_phy->dev;
+ rtk_phy->phy.label = "rtk-usb3phy";
+ rtk_phy->phy.notify_port_status = rtk_usb_phy_notify_port_status;
+
+ if (!dev->of_node) {
+ dev_err(dev, "%s %d No device node\n", __func__, __LINE__);
+ ret = -ENODEV;
+ goto err;
+ }
+
+ node = dev->of_node;
+
+ phyN = of_get_child_count(node);
+ rtk_phy->phyN = phyN;
+ dev_dbg(dev, "%s phyN=%d\n", __func__, rtk_phy->phyN);
+
+ rtk_phy->reg_addr = devm_kzalloc(dev,
+ sizeof(struct reg_addr) * phyN, GFP_KERNEL);
+ if (!rtk_phy->reg_addr)
+ return -ENOMEM;
+
+ rtk_phy->phy_data = devm_kzalloc(dev,
+ sizeof(struct phy_data) * phyN, GFP_KERNEL);
+ if (!rtk_phy->phy_data)
+ return -ENOMEM;
+
+ for (sub_node = of_get_next_child(node, NULL); sub_node != NULL;
+ sub_node = of_get_next_child(node, sub_node)) {
+ ret = get_phy_parameter(rtk_phy, sub_node);
+ if (ret) {
+ dev_err(dev, "%s: get_phy_parameter fail ret=%d\n",
+ __func__, ret);
+ goto err;
+ }
+ }
+
+ platform_set_drvdata(pdev, rtk_phy);
+
+ generic_phy = devm_phy_create(rtk_phy->dev, NULL, &ops);
+ if (IS_ERR(generic_phy))
+ return PTR_ERR(generic_phy);
+
+ phy_set_drvdata(generic_phy, rtk_phy);
+
+ phy_provider = devm_of_phy_provider_register(rtk_phy->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ ret = usb_add_phy_dev(&rtk_phy->phy);
+ if (ret)
+ goto err;
+
+ create_debug_files(rtk_phy);
+
+err:
+ dev_dbg(&pdev->dev, "Probe RTK USB 3.0 PHY (ret=%d)\n", ret);
+
+ return ret;
+}
+
+static void rtk_usb3phy_remove(struct platform_device *pdev)
+{
+ struct rtk_usb_phy *rtk_phy = platform_get_drvdata(pdev);
+
+ remove_debug_files(rtk_phy);
+
+ usb_remove_phy(&rtk_phy->phy);
+}
+
+static const struct of_device_id usbphy_rtk_dt_match[] = {
+ { .compatible = "realtek,usb3phy", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, usbphy_rtk_dt_match);
+
+static struct platform_driver rtk_usb3phy_driver = {
+ .probe = rtk_usb3phy_probe,
+ .remove_new = rtk_usb3phy_remove,
+ .driver = {
+ .name = "rtk-usb3phy",
+ .owner = THIS_MODULE,
+ .of_match_table = usbphy_rtk_dt_match,
+ },
+};
+
+module_platform_driver(rtk_usb3phy_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform: rtk-usb3phy");
+MODULE_AUTHOR("Stanley Chang <stanley_chang@...ltek.com>");
+MODULE_DESCRIPTION("Realtek usb 3.0 phy driver");
--
2.34.1
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