This patchset add generic phy driver for stingray usb phy.
Stingray has two usb phy modules drdu3 and usb3h-drdu2.
drdu3 has one super speed and one high speed phys.
usb3h-drdu2 has one super speed phy and two high speed phys.
All patches are based on linux-phy/next.
Srinath Mannam (2):
dt-bindings: phy: Add stingray usb phy documentation
phy: Add stingray usb phy driver
.../bindings/phy/brcm,stingray-usb-phy.txt | 72 ++
drivers/phy/broadcom/Kconfig | 13 +
drivers/phy/broadcom/Makefile | 1 +
drivers/phy/broadcom/phy-bcm-stingray-usb.c | 722 +++++++++++++++++++++
4 files changed, 808 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/brcm,stingray-usb-phy.txt
create mode 100644 drivers/phy/broadcom/phy-bcm-stingray-usb.c
--
2.7.4
Add DT binding document for stingray usb phy driver.
Signed-off-by: Srinath Mannam <[email protected]>
Reviewed-by: Ray Jui <[email protected]>
---
.../bindings/phy/brcm,stingray-usb-phy.txt | 72 ++++++++++++++++++++++
1 file changed, 72 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/brcm,stingray-usb-phy.txt
diff --git a/Documentation/devicetree/bindings/phy/brcm,stingray-usb-phy.txt b/Documentation/devicetree/bindings/phy/brcm,stingray-usb-phy.txt
new file mode 100644
index 0000000..22ff1db
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/brcm,stingray-usb-phy.txt
@@ -0,0 +1,72 @@
+BROADCOM STINGRAY USB PHY
+
+Required properties:
+ - compatible : should be one of the listed compatibles
+ - "brcm,sr-u3h-u2drd-phy"
+ - "brcm,sr-u3drd-phy"
+ - reg: offset and length of the PHY blocks registers
+ two base address and length should be passed.
+ - reg-names: should be from "drdu3","usb3h", "drdu2"
+ "drdu3" for compatible string "brcm,sr-u3drd-phy"
+ "usb3h" and "drdu2" for compatible string "brcm,sr-u3h-u2drd-phy"
+ - address-cells: should be 1
+ - size-cells: should be 0
+
+Sub-nodes:
+ Each port's PHY should be represented as a sub-node.
+
+Sub-nodes required properties:
+ - reg: the PHY port number
+ port numbers of sr-u3h-u2drd-phy should be as
+ - USB3H super speed port is 0
+ - DRDU2 is 1
+ - USB3H high speed port is 2
+ port numbers of sr-u3drd-phy should be as
+ - DRDU3 super speed port is 0
+ - DRDU3 high speed port is 1
+ - phy-cells: generic PHY binding; must be 1
+ The first argument of phy-cell represents the PHY mode in the requested node
+ as either host mode or device mode.
+ for host mode is 1 and device mode is 2.
+
+Refer to phy/phy-bindings.txt for the generic PHY binding properties
+
+Example:
+ usbphy0: usb-phy@68500000 {
+ compatible = "brcm,sr-u3drd-phy";
+ reg = <0x68500000 0x100>;
+ reg-names = "drdu3";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ usb0_phy0: phy@0 {
+ reg = <0>;
+ #phy-cells = <1>;
+ };
+ usb0_phy1: phy@1 {
+ reg = <1>;
+ #phy-cells = <1>;
+ };
+ };
+
+ usbphy1: usb-phy@68520000 {
+ compatible = "brcm,sr-u3h-u2drd-phy";
+ reg = <0x68510000 0x100>,
+ <0x68520000 0x100>;
+ reg-names = "usb3h", "drdu2";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ usb1_phy0: phy@0 {
+ reg = <0>;
+ #phy-cells = <1>;
+ };
+ usb1_phy1: phy@1 {
+ reg = <1>;
+ #phy-cells = <1>;
+ };
+ usb1_phy2: phy@2 {
+ reg = <2>;
+ #phy-cells = <1>;
+ };
+ };
--
2.7.4
USB phy driver for stingray USB DRDU3 and DRDU2/USB3H
phy modules
Signed-off-by: Srinath Mannam <[email protected]>
Reviewed-by: Ray Jui <[email protected]>
Reviewed-by: Scott Branden <[email protected]>
---
drivers/phy/broadcom/Kconfig | 13 +
drivers/phy/broadcom/Makefile | 1 +
drivers/phy/broadcom/phy-bcm-stingray-usb.c | 722 ++++++++++++++++++++++++++++
3 files changed, 736 insertions(+)
create mode 100644 drivers/phy/broadcom/phy-bcm-stingray-usb.c
diff --git a/drivers/phy/broadcom/Kconfig b/drivers/phy/broadcom/Kconfig
index 37371b8..185a84b 100644
--- a/drivers/phy/broadcom/Kconfig
+++ b/drivers/phy/broadcom/Kconfig
@@ -58,6 +58,19 @@ config PHY_NS2_USB_DRD
If unsure, say N.
+config PHY_STINGRAY_USB
+ tristate "Broadcom Stingray USB2 DRD PHY driver"
+ depends on OF && (ARCH_BCM_IPROC || COMPILE_TEST)
+ select GENERIC_PHY
+ default ARCH_BCM_IPROC
+ help
+ Enable this to support the Broadcom Stingray USB PHY for DRDU3,
+ DRDU2 and USB3H.
+ This driver initializes the PHY which can be used in both
+ Host and Device modes.
+
+ If unsure, say N.
+
config PHY_BRCM_SATA
tristate "Broadcom SATA PHY driver"
depends on ARCH_BRCMSTB || ARCH_BCM_IPROC || BMIPS_GENERIC || COMPILE_TEST
diff --git a/drivers/phy/broadcom/Makefile b/drivers/phy/broadcom/Makefile
index 4eb82ec..78c1033 100644
--- a/drivers/phy/broadcom/Makefile
+++ b/drivers/phy/broadcom/Makefile
@@ -4,4 +4,5 @@ obj-$(CONFIG_PHY_BCM_NS_USB2) += phy-bcm-ns-usb2.o
obj-$(CONFIG_PHY_BCM_NS_USB3) += phy-bcm-ns-usb3.o
obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
obj-$(CONFIG_PHY_NS2_USB_DRD) += phy-bcm-ns2-usbdrd.o
+obj-$(CONFIG_PHY_STINGRAY_USB) += phy-bcm-stingray-usb.o
obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
diff --git a/drivers/phy/broadcom/phy-bcm-stingray-usb.c b/drivers/phy/broadcom/phy-bcm-stingray-usb.c
new file mode 100644
index 0000000..03603fd
--- /dev/null
+++ b/drivers/phy/broadcom/phy-bcm-stingray-usb.c
@@ -0,0 +1,722 @@
+/*
+ * Copyright (C) 2017 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+#define DRDU2_U2PLL_NDIV_FRAC 0x0
+
+#define DRDU2_U2PLL_NDIV_INT 0x4
+
+#define DRDU2_U2PLL_CTRL 0x8
+#define DRDU2_U2PLL_LOCK BIT(6)
+#define DRDU2_U2PLL_RESETB BIT(5)
+#define DRDU2_U2PLL_PDIV_MASK 0xF
+#define DRDU2_U2PLL_PDIV_OFFSET 1
+#define DRDU2_U2PLL_SUSPEND_EN BIT(0)
+
+#define DRDU2_PHY_CTRL 0x0C
+#define DRDU2_U2IDDQ BIT(30)
+#define DRDU2_U2SOFT_RST_N BIT(29)
+#define DRDU2_U2PHY_ON_FLAG BIT(22)
+#define DRDU2_U2PHY_PCTL_MASK 0xFFFF
+#define DRDU2_U2PHY_PCTL_OFFSET 6
+#define DRDU2_U2PHY_RESETB BIT(5)
+#define DRDU2_U2PHY_ISO BIT(4)
+#define DRDU2_U2AFE_BG_PWRDWNB BIT(3)
+#define DRDU2_U2AFE_PLL_PWRDWNB BIT(2)
+#define DRDU2_U2AFE_LDO_PWRDWNB BIT(1)
+#define DRDU2_U2CTRL_CORERDY BIT(0)
+
+#define DRDU2_STRAP_CTRL 0x18
+#define DRDU2_FORCE_HOST_MODE BIT(5)
+#define DRDU2_FORCE_DEVICE_MODE BIT(4)
+#define BDC_USB_STP_SPD_MASK 0x7
+#define BDC_USB_STP_SPD_OFFSET 0
+
+#define DRDU2_PWR_CTRL 0x1C
+#define DRDU2_U2PHY_DFE_SWITCH_PWROKIN_I BIT(2)
+#define DRDU2_U2PHY_DFE_SWITCH_PWRONIN_I BIT(1)
+
+#define DRDU2_SOFT_RESET_CTRL 0x20
+#define DRDU2_BDC_AXI_SOFT_RST_N BIT(0)
+
+#define USB3H_U2PLL_NDIV_FRAC 0x4
+
+#define USB3H_U2PLL_NDIV_INT 0x8
+
+#define USB3H_U2PLL_CTRL 0xC
+#define USB3H_U2PLL_LOCK BIT(6)
+#define USB3H_U2PLL_RESETB BIT(5)
+#define USB3H_U2PLL_PDIV_MASK 0xF
+#define USB3H_U2PLL_PDIV_OFFSET 1
+
+#define USB3H_U2PHY_CTRL 0x10
+#define USB3H_U2PHY_ON_FLAG 22
+#define USB3H_U2PHY_PCTL_MASK 0xFFFF
+#define USB3H_U2PHY_PCTL_OFFSET 6
+#define USB3H_U2PHY_RESETB BIT(5)
+#define USB3H_U2PHY_ISO BIT(4)
+#define USB3H_U2AFE_BG_PWRDWNB BIT(3)
+#define USB3H_U2AFE_PLL_PWRDWNB BIT(2)
+#define USB3H_U2AFE_LDO_PWRDWNB BIT(1)
+#define USB3H_U2CTRL_CORERDY BIT(0)
+
+#define USB3H_U3PHY_CTRL 0x14
+#define USB3H_U3SOFT_RST_N BIT(30)
+#define USB3H_U3MDIO_RESETB_I BIT(29)
+#define USB3H_U3POR_RESET_I BIT(28)
+#define USB3H_U3PHY_PCTL_MASK 0xFFFF
+#define USB3H_U3PHY_PCTL_OFFSET 2
+#define USB3H_U3PHY_RESETB BIT(1)
+
+#define USB3H_U3PHY_PLL_CTRL 0x18
+#define USB3H_U3PLL_REFCLK_MASK 0x7
+#define USB3H_U3PLL_REFCLK_OFFSET 4
+#define USB3H_U3PLL_SS_LOCK BIT(3)
+#define USB3H_U3PLL_SEQ_START BIT(2)
+#define USB3H_U3SSPLL_SUSPEND_EN BIT(1)
+#define USB3H_U3PLL_RESETB BIT(0)
+
+#define USB3H_PWR_CTRL 0x28
+#define USB3H_PWR_CTRL_OVERRIDE_I_R 4
+
+#define USB3H_SOFT_RESET_CTRL 0x2C
+#define USB3H_XHC_AXI_SOFT_RST_N BIT(1)
+
+#define USB3H_PHY_PWR_CTRL 0x38
+#define USB3H_DISABLE_USB30_P0 BIT(2)
+#define USB3H_DISABLE_EUSB_P1 BIT(1)
+#define USB3H_DISABLE_EUSB_P0 BIT(0)
+
+
+#define DRDU3_U2PLL_NDIV_FRAC 0x4
+
+#define DRDU3_U2PLL_NDIV_INT 0x8
+
+#define DRDU3_U2PLL_CTRL 0xC
+#define DRDU3_U2PLL_LOCK BIT(6)
+#define DRDU3_U2PLL_RESETB BIT(5)
+#define DRDU3_U2PLL_PDIV_MASK 0xF
+#define DRDU3_U2PLL_PDIV_OFFSET 1
+
+#define DRDU3_U2PHY_CTRL 0x10
+#define DRDU3_U2PHY_ON_FLAG BIT(22)
+#define DRDU3_U2PHY_PCTL_MASK 0xFFFF
+#define DRDU3_U2PHY_PCTL_OFFSET 6
+#define DRDU3_U2PHY_RESETB BIT(5)
+#define DRDU3_U2PHY_ISO BIT(4)
+#define DRDU3_U2AFE_BG_PWRDWNB BIT(3)
+#define DRDU3_U2AFE_PLL_PWRDWNB BIT(2)
+#define DRDU3_U2AFE_LDO_PWRDWNB BIT(1)
+#define DRDU3_U2CTRL_CORERDY BIT(0)
+
+#define DRDU3_U3PHY_CTRL 0x14
+#define DRDU3_U3XHC_SOFT_RST_N BIT(31)
+#define DRDU3_U3BDC_SOFT_RST_N BIT(30)
+#define DRDU3_U3MDIO_RESETB_I BIT(29)
+#define DRDU3_U3POR_RESET_I BIT(28)
+#define DRDU3_U3PHY_PCTL_MASK 0xFFFF
+#define DRDU3_U3PHY_PCTL_OFFSET 2
+#define DRDU3_U3PHY_RESETB BIT(1)
+
+#define DRDU3_U3PHY_PLL_CTRL 0x18
+#define DRDU3_U3PLL_REFCLK_MASK 0x7
+#define DRDU3_U3PLL_REFCLK_OFFSET 4
+#define DRDU3_U3PLL_SS_LOCK BIT(3)
+#define DRDU3_U3PLL_SEQ_START BIT(2)
+#define DRDU3_U3SSPLL_SUSPEND_EN BIT(1)
+#define DRDU3_U3PLL_RESETB BIT(0)
+
+#define DRDU3_STRAP_CTRL 0x28
+#define BDC_USB_STP_SPD_MASK 0x7
+#define BDC_USB_STP_SPD_OFFSET 0
+#define BDC_USB_STP_SPD_SS 0x0
+#define BDC_USB_STP_SPD_HS 0x2
+
+#define DRDU3_PWR_CTRL 0x2c
+#define DRDU3_PWR_CTRL_OVERRIDE_I_R 4
+
+#define DRDU3_SOFT_RESET_CTRL 0x30
+#define DRDU3_XHC_AXI_SOFT_RST_N BIT(1)
+#define DRDU3_BDC_AXI_SOFT_RST_N BIT(0)
+
+#define DRDU3_PHY_PWR_CTRL 0x3c
+#define DRDU3_DISABLE_USB30_P0 BIT(2)
+#define DRDU3_DISABLE_EUSB_P1 BIT(1)
+#define DRDU3_DISABLE_EUSB_P0 BIT(0)
+
+#define PLL_REFCLK_PAD 0x0
+#define PLL_REFCLK_25MHZ 0x1
+#define PLL_REFCLK_96MHZ 0x2
+#define PLL_REFCLK_INTERNAL 0x3
+#define PLL_LOCK_RETRY_COUNT 1000
+
+
+#define U2PLL_NDIV_INT_VAL 0x13
+#define U2PLL_NDIV_FRAC_VAL 0x1005
+#define U2PLL_PDIV_VAL 0x1
+/*
+ * 0x0806 of PCTL_VAL has below bits set
+ * BIT-8 : refclk divider 1
+ * BIT-3:2: device mode; mode is not effect
+ * BIT-1: soft reset active low
+ */
+#define U2PHY_PCTL_VAL 0x0806
+#define U3PHY_PCTL_VAL 0x0006
+
+#define MAX_NR_PORTS 3
+
+#define USB3H_DRDU2_PHY 1
+#define DRDU3_PHY 2
+
+#define USB_HOST_MODE 1
+#define USB_DEV_MODE 2
+
+#define USB3SS_PORT 0
+#define DRDU2_PORT 1
+#define USB3HS_PORT 2
+
+#define DRD3SS_PORT 0
+#define DRD3HS_PORT 1
+
+struct sr_usb_phy {
+ void __iomem *drdu2reg;
+ void __iomem *usb3hreg;
+ void __iomem *drdu3reg;
+ uint32_t phy_id;
+ struct sr_usb_phy_port *phy_port;
+};
+
+struct sr_usb_phy_port {
+ uint32_t port_id;
+ uint32_t mode;
+ struct phy *gphy;
+ struct sr_usb_phy *p;
+};
+
+static inline void reg32_clrbits(void __iomem *addr, uint32_t clear)
+{
+ writel(readl(addr) & ~clear, addr);
+}
+
+static inline void reg32_setbits(void __iomem *addr, uint32_t set)
+{
+ writel(readl(addr) | set, addr);
+}
+
+static int pll_lock_check(void __iomem *addr, u32 bit)
+{
+ int retry;
+ u32 rd_data;
+
+ retry = PLL_LOCK_RETRY_COUNT;
+ do {
+ rd_data = readl(addr);
+ if (rd_data & bit)
+ return 0;
+ udelay(1);
+ } while (--retry > 0);
+
+ pr_err("%s: FAIL\n", __func__);
+ return -ETIMEDOUT;
+}
+
+static struct phy *bcm_usb_phy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct sr_usb_phy_port *phy_port = dev_get_drvdata(dev);
+ struct sr_usb_phy *p;
+
+ if (!phy_port)
+ return ERR_PTR(-EINVAL);
+
+ p = phy_port->p;
+
+ if (WARN_ON(args->args[0] < 1 || args->args[0] > 2))
+ return ERR_PTR(-EINVAL);
+
+ if (WARN_ON(args->args_count < 1))
+ return ERR_PTR(-EINVAL);
+
+ if ((p->phy_id == USB3H_DRDU2_PHY) && (phy_port->port_id == 0) &&
+ (args->args[0] == USB_DEV_MODE))
+ return ERR_PTR(-EINVAL);
+
+ phy_port->mode |= args->args[0];
+
+ return phy_port->gphy;
+}
+
+static int usb3h_u2_phy_power_on(void __iomem *regs)
+{
+ u32 rd_data;
+ int ret = 0;
+
+ /* Set Core Ready high */
+ reg32_setbits(regs + USB3H_U2PHY_CTRL, USB3H_U2CTRL_CORERDY);
+ msleep(100);
+
+ rd_data = readl(regs + USB3H_U2PHY_CTRL);
+ rd_data &= ~(USB3H_U2PHY_PCTL_MASK << USB3H_U2PHY_PCTL_OFFSET);
+ rd_data |= (U2PHY_PCTL_VAL << USB3H_U2PHY_PCTL_OFFSET);
+ writel(rd_data, regs + USB3H_U2PHY_CTRL);
+
+ msleep(300);
+ reg32_setbits(regs + USB3H_U2PLL_CTRL,
+ USB3H_U2PLL_RESETB);
+
+ reg32_setbits(regs + USB3H_U2PHY_CTRL,
+ USB3H_U2PHY_RESETB);
+
+ ret = pll_lock_check(regs + USB3H_U2PLL_CTRL, USB3H_U2PLL_LOCK);
+
+ return ret;
+}
+
+
+static int usb3h_u3_phy_power_on(void __iomem *regs)
+{
+ u32 rd_data;
+ int ret = 0;
+
+ /* Set pctl with mode and soft reset */
+ rd_data = readl(regs + USB3H_U3PHY_CTRL);
+ rd_data &= ~(USB3H_U3PHY_PCTL_MASK << USB3H_U3PHY_PCTL_OFFSET);
+ rd_data |= (U3PHY_PCTL_VAL << USB3H_U3PHY_PCTL_OFFSET);
+ writel(rd_data, regs + USB3H_U3PHY_CTRL);
+
+ reg32_clrbits(regs + USB3H_U3PHY_PLL_CTRL,
+ USB3H_U3SSPLL_SUSPEND_EN);
+ reg32_setbits(regs + USB3H_U3PHY_PLL_CTRL,
+ USB3H_U3PLL_SEQ_START);
+ reg32_setbits(regs + USB3H_U3PHY_PLL_CTRL,
+ USB3H_U3PLL_RESETB);
+
+ msleep(30);
+
+ ret = pll_lock_check(regs + USB3H_U3PHY_PLL_CTRL, USB3H_U3PLL_SS_LOCK);
+
+ return ret;
+}
+
+
+static int drdu3_u2_phy_power_on(void __iomem *regs)
+{
+ u32 rd_data;
+ int ret = 0;
+
+ /* Set Core Ready high */
+ reg32_setbits(regs + DRDU3_U2PHY_CTRL, DRDU3_U2CTRL_CORERDY);
+
+ msleep(100);
+
+ rd_data = readl(regs + DRDU3_STRAP_CTRL);
+ rd_data &= (~(BDC_USB_STP_SPD_MASK << BDC_USB_STP_SPD_OFFSET));
+ rd_data |= (BDC_USB_STP_SPD_SS << BDC_USB_STP_SPD_OFFSET);
+ writel(rd_data, regs + DRDU3_STRAP_CTRL);
+
+ rd_data = readl(regs + DRDU3_U2PHY_CTRL);
+ rd_data &= ~(DRDU3_U2PHY_PCTL_MASK << DRDU3_U2PHY_PCTL_OFFSET);
+ rd_data |= (U2PHY_PCTL_VAL << DRDU3_U2PHY_PCTL_OFFSET);
+ writel(rd_data, regs + DRDU3_U2PHY_CTRL);
+
+ msleep(300);
+
+ reg32_setbits(regs + DRDU3_U2PLL_CTRL,
+ DRDU3_U2PLL_RESETB);
+
+ reg32_setbits(regs + DRDU3_U2PHY_CTRL,
+ DRDU3_U2PHY_RESETB);
+
+ ret = pll_lock_check(regs + DRDU3_U2PLL_CTRL, DRDU3_U2PLL_LOCK);
+
+ return ret;
+}
+
+static int drdu3_u3_phy_power_on(void __iomem *regs)
+{
+ u32 rd_data;
+ int ret = 0;
+
+ /* Set pctl with mode and soft reset */
+ rd_data = readl(regs + DRDU3_U3PHY_CTRL);
+ rd_data &= ~(DRDU3_U3PHY_PCTL_MASK << DRDU3_U3PHY_PCTL_OFFSET);
+ rd_data |= (U3PHY_PCTL_VAL << DRDU3_U3PHY_PCTL_OFFSET);
+ writel(rd_data, regs + DRDU3_U3PHY_CTRL);
+
+ reg32_clrbits(regs + DRDU3_U3PHY_PLL_CTRL,
+ DRDU3_U3SSPLL_SUSPEND_EN);
+ reg32_setbits(regs + DRDU3_U3PHY_PLL_CTRL,
+ DRDU3_U3PLL_SEQ_START);
+ reg32_setbits(regs + DRDU3_U3PHY_PLL_CTRL,
+ DRDU3_U3PLL_RESETB);
+
+ msleep(30);
+
+ ret = pll_lock_check(regs + DRDU3_U3PHY_PLL_CTRL, DRDU3_U3PLL_SS_LOCK);
+
+ return ret;
+}
+
+
+static int drdu2_u2_phy_power_on(void __iomem *regs)
+{
+ u32 rd_data;
+ int ret = 0;
+
+ writel(U2PLL_NDIV_INT_VAL, regs + DRDU2_U2PLL_NDIV_INT);
+ writel(U2PLL_NDIV_FRAC_VAL, regs + DRDU2_U2PLL_NDIV_FRAC);
+
+ rd_data = readl(regs + DRDU2_U2PLL_CTRL);
+ rd_data &= ~(DRDU2_U2PLL_PDIV_MASK << DRDU2_U2PLL_PDIV_OFFSET);
+ rd_data |= (U2PLL_PDIV_VAL << DRDU2_U2PLL_PDIV_OFFSET);
+ writel(rd_data, regs + DRDU2_U2PLL_CTRL);
+
+ reg32_setbits(regs + DRDU2_PHY_CTRL, DRDU2_U2CTRL_CORERDY);
+
+ msleep(100);
+ reg32_setbits(regs + DRDU2_U2PLL_CTRL,
+ DRDU2_U2PLL_RESETB);
+
+ reg32_setbits(regs + DRDU2_PHY_CTRL,
+ DRDU2_U2PHY_RESETB);
+
+ rd_data = readl(regs + DRDU2_PHY_CTRL);
+ rd_data &= ~(DRDU2_U2PHY_PCTL_MASK << DRDU2_U2PHY_PCTL_OFFSET);
+ rd_data |= (U2PHY_PCTL_VAL << DRDU2_U2PHY_PCTL_OFFSET);
+ writel(rd_data, regs + DRDU2_PHY_CTRL);
+
+ ret = pll_lock_check(regs + DRDU2_U2PLL_CTRL, DRDU2_U2PLL_LOCK);
+
+ return ret;
+}
+static int sr_u3h_u2drd_phy_reset(struct phy *gphy)
+{
+ struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
+ struct sr_usb_phy *p = phy_port->p;
+
+ switch (phy_port->port_id) {
+ case USB3HS_PORT:
+ reg32_clrbits(p->usb3hreg + USB3H_U2PHY_CTRL,
+ USB3H_U2CTRL_CORERDY);
+ reg32_setbits(p->usb3hreg + USB3H_U2PHY_CTRL,
+ USB3H_U2CTRL_CORERDY);
+ break;
+ case DRDU2_PORT:
+ reg32_clrbits(p->drdu2reg + DRDU2_PHY_CTRL,
+ DRDU2_U2CTRL_CORERDY);
+ reg32_setbits(p->drdu2reg + DRDU2_PHY_CTRL,
+ DRDU2_U2CTRL_CORERDY);
+ break;
+ }
+ return 0;
+}
+
+static int sr_u3drd_phy_reset(struct phy *gphy)
+{
+ struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
+ struct sr_usb_phy *p = phy_port->p;
+
+ switch (phy_port->port_id) {
+ case DRD3HS_PORT:
+ reg32_clrbits(p->drdu3reg + DRDU3_U2PHY_CTRL,
+ DRDU3_U2CTRL_CORERDY);
+ reg32_setbits(p->drdu3reg + DRDU3_U2PHY_CTRL,
+ DRDU3_U2CTRL_CORERDY);
+ break;
+ }
+ return 0;
+}
+
+static int sr_u3h_u2drd_phy_power_on(struct phy *gphy)
+{
+ struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
+ struct sr_usb_phy *p = phy_port->p;
+ int ret = 0;
+
+ switch (phy_port->port_id) {
+ case USB3SS_PORT:
+ reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ USB3H_DISABLE_USB30_P0);
+ ret = usb3h_u3_phy_power_on(p->usb3hreg);
+ if (ret)
+ goto err_usb3h_phy_on;
+ break;
+ case USB3HS_PORT:
+ reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ USB3H_DISABLE_EUSB_P1);
+ ret = usb3h_u2_phy_power_on(p->usb3hreg);
+ if (ret)
+ goto err_usb3h_phy_on;
+
+ break;
+ case DRDU2_PORT:
+ reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ USB3H_DISABLE_EUSB_P0);
+
+ ret = drdu2_u2_phy_power_on(p->drdu2reg);
+ if (ret) {
+ reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ USB3H_DISABLE_EUSB_P0);
+ goto err_drdu2_phy_on;
+ }
+ break;
+ }
+
+ /* Device Mode */
+ if (phy_port->port_id == DRDU2_PORT) {
+ writel(DRDU2_BDC_AXI_SOFT_RST_N,
+ p->drdu2reg + DRDU2_SOFT_RESET_CTRL);
+ reg32_setbits(p->drdu2reg + DRDU2_PHY_CTRL,
+ DRDU2_U2SOFT_RST_N);
+ }
+ /* Host Mode */
+ writel(USB3H_XHC_AXI_SOFT_RST_N,
+ p->usb3hreg + USB3H_SOFT_RESET_CTRL);
+ reg32_setbits(p->usb3hreg + USB3H_U3PHY_CTRL,
+ USB3H_U3SOFT_RST_N);
+
+ return 0;
+err_usb3h_phy_on:
+ reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ (USB3H_DISABLE_EUSB_P1 |
+ USB3H_DISABLE_USB30_P0));
+err_drdu2_phy_on:
+
+ return ret;
+}
+
+static int sr_u3drd_phy_power_on(struct phy *gphy)
+{
+ struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
+ struct sr_usb_phy *p = phy_port->p;
+ int ret = 0;
+
+ switch (phy_port->port_id) {
+ case DRD3SS_PORT:
+ reg32_clrbits(p->drdu3reg + USB3H_PHY_PWR_CTRL,
+ DRDU3_DISABLE_USB30_P0);
+
+ ret = drdu3_u3_phy_power_on(p->drdu3reg);
+ if (ret)
+ goto err_drdu3_phy_on;
+ break;
+ case DRD3HS_PORT:
+ reg32_clrbits(p->drdu3reg + USB3H_PHY_PWR_CTRL,
+ DRDU3_DISABLE_EUSB_P0);
+ ret = drdu3_u2_phy_power_on(p->drdu3reg);
+ if (ret)
+ goto err_drdu3_phy_on;
+ break;
+ }
+ /* Host Mode */
+ reg32_setbits(p->drdu3reg + DRDU3_SOFT_RESET_CTRL,
+ DRDU3_XHC_AXI_SOFT_RST_N);
+ reg32_setbits(p->drdu3reg + DRDU3_U3PHY_CTRL,
+ DRDU3_U3XHC_SOFT_RST_N);
+ /* Device Mode */
+ reg32_setbits(p->drdu3reg + DRDU3_SOFT_RESET_CTRL,
+ DRDU3_BDC_AXI_SOFT_RST_N);
+ reg32_setbits(p->drdu3reg + DRDU3_U3PHY_CTRL,
+ DRDU3_U3BDC_SOFT_RST_N);
+
+ return 0;
+err_drdu3_phy_on:
+ reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
+ (DRDU3_DISABLE_EUSB_P0 |
+ DRDU3_DISABLE_USB30_P0));
+
+ return ret;
+}
+
+static int sr_u3h_u2drd_phy_power_off(struct phy *gphy)
+{
+ struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
+ struct sr_usb_phy *p = phy_port->p;
+
+ switch (phy_port->port_id) {
+ case USB3SS_PORT:
+ reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ USB3H_DISABLE_USB30_P0);
+ break;
+ case USB3HS_PORT:
+ reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ USB3H_DISABLE_EUSB_P1);
+ break;
+ case DRDU2_PORT:
+ reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
+ USB3H_DISABLE_EUSB_P0);
+ break;
+ }
+
+ return 0;
+}
+
+static int sr_u3drd_phy_power_off(struct phy *gphy)
+{
+ struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
+ struct sr_usb_phy *p = phy_port->p;
+
+ switch (phy_port->port_id) {
+ case DRD3SS_PORT:
+ reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
+ DRDU3_DISABLE_USB30_P0);
+ break;
+ case DRD3HS_PORT:
+ reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
+ DRDU3_DISABLE_EUSB_P0);
+ break;
+ }
+ return 0;
+}
+
+static struct phy_ops sr_u3h_u2drd_phy_ops = {
+ .power_on = sr_u3h_u2drd_phy_power_on,
+ .power_off = sr_u3h_u2drd_phy_power_off,
+ .reset = sr_u3h_u2drd_phy_reset,
+ .owner = THIS_MODULE,
+};
+
+static struct phy_ops sr_u3drd_phy_ops = {
+ .power_on = sr_u3drd_phy_power_on,
+ .power_off = sr_u3drd_phy_power_off,
+ .reset = sr_u3drd_phy_reset,
+ .owner = THIS_MODULE,
+};
+
+static const struct of_device_id sr_usb_phy_of_match[] = {
+ {
+ .compatible = "brcm,sr-u3h-u2drd-phy",
+ .data = &sr_u3h_u2drd_phy_ops,
+ },
+ {
+ .compatible = "brcm,sr-u3drd-phy",
+ .data = &sr_u3drd_phy_ops,
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sr_usb_phy_of_match);
+
+static int sr_usb_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sr_usb_phy *p;
+ struct device_node *dn = dev->of_node, *child;
+ struct resource *res;
+ struct phy *gphy;
+ const struct phy_ops *ops;
+ struct phy_provider *phy_provider;
+ const struct of_device_id *match;
+ struct sr_usb_phy_port *phy_port;
+ uint32_t child_cnt, cnt = 0;
+
+ match = of_match_node(sr_usb_phy_of_match, dn);
+ if (!match) {
+ dev_err(dev, "of_match_node() failed\n");
+ return -EINVAL;
+ }
+ ops = match->data;
+
+ child_cnt = of_get_child_count(dn);
+ if (!child_cnt || child_cnt > MAX_NR_PORTS)
+ return -ENODEV;
+
+ p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ p->phy_port = devm_kcalloc(dev, child_cnt,
+ sizeof(struct sr_usb_phy_port),
+ GFP_KERNEL);
+ if (!p->phy_port)
+ return -ENOMEM;
+
+ if (of_device_is_compatible(dn, "brcm,sr-u3h-u2drd-phy")) {
+ void __iomem *drdu2reg, *usb3hreg;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "drdu2");
+ drdu2reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(drdu2reg))
+ return PTR_ERR(drdu2reg);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "usb3h");
+ usb3hreg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(usb3hreg))
+ return PTR_ERR(usb3hreg);
+
+ p->drdu2reg = drdu2reg;
+ p->usb3hreg = usb3hreg;
+ p->phy_id = USB3H_DRDU2_PHY;
+ }
+ if (of_device_is_compatible(dn, "brcm,sr-u3drd-phy")) {
+ void __iomem *drdu3reg;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "drdu3");
+ drdu3reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(drdu3reg))
+ return PTR_ERR(drdu3reg);
+
+ p->drdu3reg = drdu3reg;
+ p->phy_id = DRDU3_PHY;
+ }
+
+ for_each_available_child_of_node(dn, child) {
+ phy_port = &p->phy_port[cnt];
+ if (of_property_read_u32(child, "reg", &phy_port->port_id)) {
+ dev_err(dev, "missing reg property in node %s\n",
+ child->name);
+ return -EINVAL;
+ }
+ if (phy_port->port_id >= MAX_NR_PORTS)
+ return -EINVAL;
+
+ gphy = devm_phy_create(dev, child, ops);
+ if (IS_ERR(gphy))
+ return PTR_ERR(gphy);
+
+ phy_set_drvdata(gphy, phy_port);
+ dev_set_drvdata(&gphy->dev, phy_port);
+ phy_provider = devm_of_phy_provider_register(&gphy->dev,
+ bcm_usb_phy_xlate);
+ if (IS_ERR(phy_provider)) {
+ dev_err(dev, "Failed to register phy provider\n");
+ return PTR_ERR(phy_provider);
+ }
+ phy_port->gphy = gphy;
+ phy_port->p = p;
+ cnt++;
+ }
+
+ return 0;
+}
+
+static struct platform_driver sr_usb_phy_driver = {
+ .driver = {
+ .name = "phy-bcm-sr-usb",
+ .of_match_table = sr_usb_phy_of_match,
+ },
+ .probe = sr_usb_phy_probe,
+};
+module_platform_driver(sr_usb_phy_driver);
+
+MODULE_AUTHOR("Broadcom");
+MODULE_DESCRIPTION("Broadcom stingray USB Phy driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
On Fri, Jul 07, 2017 at 06:37:04PM +0530, Srinath Mannam wrote:
> Add DT binding document for stingray usb phy driver.
>
> Signed-off-by: Srinath Mannam <[email protected]>
> Reviewed-by: Ray Jui <[email protected]>
> ---
> .../bindings/phy/brcm,stingray-usb-phy.txt | 72 ++++++++++++++++++++++
> 1 file changed, 72 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/brcm,stingray-usb-phy.txt
Acked-by: Rob Herring <[email protected]>
hi,
On Friday 07 July 2017 06:37 PM, Srinath Mannam wrote:
> USB phy driver for stingray USB DRDU3 and DRDU2/USB3H
> phy modules
>
> Signed-off-by: Srinath Mannam <[email protected]>
> Reviewed-by: Ray Jui <[email protected]>
> Reviewed-by: Scott Branden <[email protected]>
> ---
> drivers/phy/broadcom/Kconfig | 13 +
> drivers/phy/broadcom/Makefile | 1 +
> drivers/phy/broadcom/phy-bcm-stingray-usb.c | 722 ++++++++++++++++++++++++++++
> 3 files changed, 736 insertions(+)
> create mode 100644 drivers/phy/broadcom/phy-bcm-stingray-usb.c
>
> diff --git a/drivers/phy/broadcom/Kconfig b/drivers/phy/broadcom/Kconfig
> index 37371b8..185a84b 100644
> --- a/drivers/phy/broadcom/Kconfig
> +++ b/drivers/phy/broadcom/Kconfig
> @@ -58,6 +58,19 @@ config PHY_NS2_USB_DRD
>
> If unsure, say N.
>
> +config PHY_STINGRAY_USB
> + tristate "Broadcom Stingray USB2 DRD PHY driver"
> + depends on OF && (ARCH_BCM_IPROC || COMPILE_TEST)
> + select GENERIC_PHY
> + default ARCH_BCM_IPROC
> + help
> + Enable this to support the Broadcom Stingray USB PHY for DRDU3,
> + DRDU2 and USB3H.
> + This driver initializes the PHY which can be used in both
> + Host and Device modes.
> +
> + If unsure, say N.
> +
> config PHY_BRCM_SATA
> tristate "Broadcom SATA PHY driver"
> depends on ARCH_BRCMSTB || ARCH_BCM_IPROC || BMIPS_GENERIC || COMPILE_TEST
> diff --git a/drivers/phy/broadcom/Makefile b/drivers/phy/broadcom/Makefile
> index 4eb82ec..78c1033 100644
> --- a/drivers/phy/broadcom/Makefile
> +++ b/drivers/phy/broadcom/Makefile
> @@ -4,4 +4,5 @@ obj-$(CONFIG_PHY_BCM_NS_USB2) += phy-bcm-ns-usb2.o
> obj-$(CONFIG_PHY_BCM_NS_USB3) += phy-bcm-ns-usb3.o
> obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
> obj-$(CONFIG_PHY_NS2_USB_DRD) += phy-bcm-ns2-usbdrd.o
> +obj-$(CONFIG_PHY_STINGRAY_USB) += phy-bcm-stingray-usb.o
> obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
> diff --git a/drivers/phy/broadcom/phy-bcm-stingray-usb.c b/drivers/phy/broadcom/phy-bcm-stingray-usb.c
> new file mode 100644
> index 0000000..03603fd
> --- /dev/null
> +++ b/drivers/phy/broadcom/phy-bcm-stingray-usb.c
> @@ -0,0 +1,722 @@
> +/*
> + * Copyright (C) 2017 Broadcom
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +
> +#define DRDU2_U2PLL_NDIV_FRAC 0x0
> +
> +#define DRDU2_U2PLL_NDIV_INT 0x4
> +
> +#define DRDU2_U2PLL_CTRL 0x8
> +#define DRDU2_U2PLL_LOCK BIT(6)
> +#define DRDU2_U2PLL_RESETB BIT(5)
> +#define DRDU2_U2PLL_PDIV_MASK 0xF
> +#define DRDU2_U2PLL_PDIV_OFFSET 1
> +#define DRDU2_U2PLL_SUSPEND_EN BIT(0)
> +
> +#define DRDU2_PHY_CTRL 0x0C
> +#define DRDU2_U2IDDQ BIT(30)
> +#define DRDU2_U2SOFT_RST_N BIT(29)
> +#define DRDU2_U2PHY_ON_FLAG BIT(22)
> +#define DRDU2_U2PHY_PCTL_MASK 0xFFFF
> +#define DRDU2_U2PHY_PCTL_OFFSET 6
> +#define DRDU2_U2PHY_RESETB BIT(5)
> +#define DRDU2_U2PHY_ISO BIT(4)
> +#define DRDU2_U2AFE_BG_PWRDWNB BIT(3)
> +#define DRDU2_U2AFE_PLL_PWRDWNB BIT(2)
> +#define DRDU2_U2AFE_LDO_PWRDWNB BIT(1)
> +#define DRDU2_U2CTRL_CORERDY BIT(0)
> +
> +#define DRDU2_STRAP_CTRL 0x18
> +#define DRDU2_FORCE_HOST_MODE BIT(5)
> +#define DRDU2_FORCE_DEVICE_MODE BIT(4)
> +#define BDC_USB_STP_SPD_MASK 0x7
> +#define BDC_USB_STP_SPD_OFFSET 0
> +
> +#define DRDU2_PWR_CTRL 0x1C
> +#define DRDU2_U2PHY_DFE_SWITCH_PWROKIN_I BIT(2)
> +#define DRDU2_U2PHY_DFE_SWITCH_PWRONIN_I BIT(1)
> +
> +#define DRDU2_SOFT_RESET_CTRL 0x20
> +#define DRDU2_BDC_AXI_SOFT_RST_N BIT(0)
> +
> +#define USB3H_U2PLL_NDIV_FRAC 0x4
> +
> +#define USB3H_U2PLL_NDIV_INT 0x8
> +
> +#define USB3H_U2PLL_CTRL 0xC
> +#define USB3H_U2PLL_LOCK BIT(6)
> +#define USB3H_U2PLL_RESETB BIT(5)
> +#define USB3H_U2PLL_PDIV_MASK 0xF
> +#define USB3H_U2PLL_PDIV_OFFSET 1
> +
> +#define USB3H_U2PHY_CTRL 0x10
> +#define USB3H_U2PHY_ON_FLAG 22
> +#define USB3H_U2PHY_PCTL_MASK 0xFFFF
> +#define USB3H_U2PHY_PCTL_OFFSET 6
> +#define USB3H_U2PHY_RESETB BIT(5)
> +#define USB3H_U2PHY_ISO BIT(4)
> +#define USB3H_U2AFE_BG_PWRDWNB BIT(3)
> +#define USB3H_U2AFE_PLL_PWRDWNB BIT(2)
> +#define USB3H_U2AFE_LDO_PWRDWNB BIT(1)
> +#define USB3H_U2CTRL_CORERDY BIT(0)
> +
> +#define USB3H_U3PHY_CTRL 0x14
> +#define USB3H_U3SOFT_RST_N BIT(30)
> +#define USB3H_U3MDIO_RESETB_I BIT(29)
> +#define USB3H_U3POR_RESET_I BIT(28)
> +#define USB3H_U3PHY_PCTL_MASK 0xFFFF
> +#define USB3H_U3PHY_PCTL_OFFSET 2
> +#define USB3H_U3PHY_RESETB BIT(1)
> +
> +#define USB3H_U3PHY_PLL_CTRL 0x18
> +#define USB3H_U3PLL_REFCLK_MASK 0x7
> +#define USB3H_U3PLL_REFCLK_OFFSET 4
> +#define USB3H_U3PLL_SS_LOCK BIT(3)
> +#define USB3H_U3PLL_SEQ_START BIT(2)
> +#define USB3H_U3SSPLL_SUSPEND_EN BIT(1)
> +#define USB3H_U3PLL_RESETB BIT(0)
> +
> +#define USB3H_PWR_CTRL 0x28
> +#define USB3H_PWR_CTRL_OVERRIDE_I_R 4
> +
> +#define USB3H_SOFT_RESET_CTRL 0x2C
> +#define USB3H_XHC_AXI_SOFT_RST_N BIT(1)
> +
> +#define USB3H_PHY_PWR_CTRL 0x38
> +#define USB3H_DISABLE_USB30_P0 BIT(2)
> +#define USB3H_DISABLE_EUSB_P1 BIT(1)
> +#define USB3H_DISABLE_EUSB_P0 BIT(0)
> +
> +
> +#define DRDU3_U2PLL_NDIV_FRAC 0x4
> +
> +#define DRDU3_U2PLL_NDIV_INT 0x8
> +
> +#define DRDU3_U2PLL_CTRL 0xC
> +#define DRDU3_U2PLL_LOCK BIT(6)
> +#define DRDU3_U2PLL_RESETB BIT(5)
> +#define DRDU3_U2PLL_PDIV_MASK 0xF
> +#define DRDU3_U2PLL_PDIV_OFFSET 1
> +
> +#define DRDU3_U2PHY_CTRL 0x10
> +#define DRDU3_U2PHY_ON_FLAG BIT(22)
> +#define DRDU3_U2PHY_PCTL_MASK 0xFFFF
> +#define DRDU3_U2PHY_PCTL_OFFSET 6
> +#define DRDU3_U2PHY_RESETB BIT(5)
> +#define DRDU3_U2PHY_ISO BIT(4)
> +#define DRDU3_U2AFE_BG_PWRDWNB BIT(3)
> +#define DRDU3_U2AFE_PLL_PWRDWNB BIT(2)
> +#define DRDU3_U2AFE_LDO_PWRDWNB BIT(1)
> +#define DRDU3_U2CTRL_CORERDY BIT(0)
> +
> +#define DRDU3_U3PHY_CTRL 0x14
> +#define DRDU3_U3XHC_SOFT_RST_N BIT(31)
> +#define DRDU3_U3BDC_SOFT_RST_N BIT(30)
> +#define DRDU3_U3MDIO_RESETB_I BIT(29)
> +#define DRDU3_U3POR_RESET_I BIT(28)
> +#define DRDU3_U3PHY_PCTL_MASK 0xFFFF
> +#define DRDU3_U3PHY_PCTL_OFFSET 2
> +#define DRDU3_U3PHY_RESETB BIT(1)
> +
> +#define DRDU3_U3PHY_PLL_CTRL 0x18
> +#define DRDU3_U3PLL_REFCLK_MASK 0x7
> +#define DRDU3_U3PLL_REFCLK_OFFSET 4
> +#define DRDU3_U3PLL_SS_LOCK BIT(3)
> +#define DRDU3_U3PLL_SEQ_START BIT(2)
> +#define DRDU3_U3SSPLL_SUSPEND_EN BIT(1)
> +#define DRDU3_U3PLL_RESETB BIT(0)
> +
> +#define DRDU3_STRAP_CTRL 0x28
> +#define BDC_USB_STP_SPD_MASK 0x7
> +#define BDC_USB_STP_SPD_OFFSET 0
> +#define BDC_USB_STP_SPD_SS 0x0
> +#define BDC_USB_STP_SPD_HS 0x2
> +
> +#define DRDU3_PWR_CTRL 0x2c
> +#define DRDU3_PWR_CTRL_OVERRIDE_I_R 4
> +
> +#define DRDU3_SOFT_RESET_CTRL 0x30
> +#define DRDU3_XHC_AXI_SOFT_RST_N BIT(1)
> +#define DRDU3_BDC_AXI_SOFT_RST_N BIT(0)
> +
> +#define DRDU3_PHY_PWR_CTRL 0x3c
> +#define DRDU3_DISABLE_USB30_P0 BIT(2)
> +#define DRDU3_DISABLE_EUSB_P1 BIT(1)
> +#define DRDU3_DISABLE_EUSB_P0 BIT(0)
> +
> +#define PLL_REFCLK_PAD 0x0
> +#define PLL_REFCLK_25MHZ 0x1
> +#define PLL_REFCLK_96MHZ 0x2
> +#define PLL_REFCLK_INTERNAL 0x3
> +#define PLL_LOCK_RETRY_COUNT 1000
> +
> +
> +#define U2PLL_NDIV_INT_VAL 0x13
> +#define U2PLL_NDIV_FRAC_VAL 0x1005
> +#define U2PLL_PDIV_VAL 0x1
> +/*
> + * 0x0806 of PCTL_VAL has below bits set
> + * BIT-8 : refclk divider 1
> + * BIT-3:2: device mode; mode is not effect
> + * BIT-1: soft reset active low
> + */
> +#define U2PHY_PCTL_VAL 0x0806
> +#define U3PHY_PCTL_VAL 0x0006
> +
> +#define MAX_NR_PORTS 3
> +
> +#define USB3H_DRDU2_PHY 1
> +#define DRDU3_PHY 2
> +
> +#define USB_HOST_MODE 1
> +#define USB_DEV_MODE 2
> +
> +#define USB3SS_PORT 0
> +#define DRDU2_PORT 1
> +#define USB3HS_PORT 2
> +
> +#define DRD3SS_PORT 0
> +#define DRD3HS_PORT 1
> +
> +struct sr_usb_phy {
> + void __iomem *drdu2reg;
> + void __iomem *usb3hreg;
> + void __iomem *drdu3reg;
> + uint32_t phy_id;
> + struct sr_usb_phy_port *phy_port;
> +};
> +
> +struct sr_usb_phy_port {
> + uint32_t port_id;
> + uint32_t mode;
> + struct phy *gphy;
> + struct sr_usb_phy *p;
> +};
> +
> +static inline void reg32_clrbits(void __iomem *addr, uint32_t clear)
> +{
> + writel(readl(addr) & ~clear, addr);
> +}
> +
> +static inline void reg32_setbits(void __iomem *addr, uint32_t set)
> +{
> + writel(readl(addr) | set, addr);
> +}
> +
> +static int pll_lock_check(void __iomem *addr, u32 bit)
> +{
> + int retry;
> + u32 rd_data;
> +
> + retry = PLL_LOCK_RETRY_COUNT;
> + do {
> + rd_data = readl(addr);
> + if (rd_data & bit)
> + return 0;
> + udelay(1);
> + } while (--retry > 0);
> +
> + pr_err("%s: FAIL\n", __func__);
> + return -ETIMEDOUT;
> +}
It would be nice if you can prefix all functions with bcm_usb.
> +
> +static struct phy *bcm_usb_phy_xlate(struct device *dev,
> + struct of_phandle_args *args)
> +{
> + struct sr_usb_phy_port *phy_port = dev_get_drvdata(dev);
> + struct sr_usb_phy *p;
> +
> + if (!phy_port)
> + return ERR_PTR(-EINVAL);
> +
> + p = phy_port->p;
> +
> + if (WARN_ON(args->args[0] < 1 || args->args[0] > 2))
Please use constant enums. I think here it means
PHY_MODE_USB_HOST/PHY_MODE_USB_DEVICE?
> + return ERR_PTR(-EINVAL);
> +
> + if (WARN_ON(args->args_count < 1))
> + return ERR_PTR(-EINVAL);
> +
> + if ((p->phy_id == USB3H_DRDU2_PHY) && (phy_port->port_id == 0) &&
> + (args->args[0] == USB_DEV_MODE))
> + return ERR_PTR(-EINVAL);
port 0 cannot be used for host mode? How about other ports?
> +
> + phy_port->mode |= args->args[0];
When is this mode used? If mode is never used, then this custom xlate is not
required at all.
> +
> + return phy_port->gphy;
> +}
> +
> +static int usb3h_u2_phy_power_on(void __iomem *regs)
> +{
> + u32 rd_data;
> + int ret = 0;
> +
> + /* Set Core Ready high */
> + reg32_setbits(regs + USB3H_U2PHY_CTRL, USB3H_U2CTRL_CORERDY);
> + msleep(100);
That looks like a huge delay? Is it really necessary
> +
> + rd_data = readl(regs + USB3H_U2PHY_CTRL);
> + rd_data &= ~(USB3H_U2PHY_PCTL_MASK << USB3H_U2PHY_PCTL_OFFSET);
> + rd_data |= (U2PHY_PCTL_VAL << USB3H_U2PHY_PCTL_OFFSET);
> + writel(rd_data, regs + USB3H_U2PHY_CTRL);
> +
> + msleep(300);
one more here.
> + reg32_setbits(regs + USB3H_U2PLL_CTRL,
> + USB3H_U2PLL_RESETB);
> +
> + reg32_setbits(regs + USB3H_U2PHY_CTRL,
> + USB3H_U2PHY_RESETB);
> +
> + ret = pll_lock_check(regs + USB3H_U2PLL_CTRL, USB3H_U2PLL_LOCK);
> +
> + return ret;
> +}
> +
> +
> +static int usb3h_u3_phy_power_on(void __iomem *regs)
> +{
> + u32 rd_data;
> + int ret = 0;
> +
> + /* Set pctl with mode and soft reset */
> + rd_data = readl(regs + USB3H_U3PHY_CTRL);
> + rd_data &= ~(USB3H_U3PHY_PCTL_MASK << USB3H_U3PHY_PCTL_OFFSET);
> + rd_data |= (U3PHY_PCTL_VAL << USB3H_U3PHY_PCTL_OFFSET);
> + writel(rd_data, regs + USB3H_U3PHY_CTRL);
> +
> + reg32_clrbits(regs + USB3H_U3PHY_PLL_CTRL,
> + USB3H_U3SSPLL_SUSPEND_EN);
> + reg32_setbits(regs + USB3H_U3PHY_PLL_CTRL,
> + USB3H_U3PLL_SEQ_START);
> + reg32_setbits(regs + USB3H_U3PHY_PLL_CTRL,
> + USB3H_U3PLL_RESETB);
> +
> + msleep(30);
> +
> + ret = pll_lock_check(regs + USB3H_U3PHY_PLL_CTRL, USB3H_U3PLL_SS_LOCK);
> +
> + return ret;
> +}
> +
> +
> +static int drdu3_u2_phy_power_on(void __iomem *regs)
> +{
> + u32 rd_data;
> + int ret = 0;
> +
> + /* Set Core Ready high */
> + reg32_setbits(regs + DRDU3_U2PHY_CTRL, DRDU3_U2CTRL_CORERDY);
> +
> + msleep(100);
> +
> + rd_data = readl(regs + DRDU3_STRAP_CTRL);
> + rd_data &= (~(BDC_USB_STP_SPD_MASK << BDC_USB_STP_SPD_OFFSET));
> + rd_data |= (BDC_USB_STP_SPD_SS << BDC_USB_STP_SPD_OFFSET);
> + writel(rd_data, regs + DRDU3_STRAP_CTRL);
> +
> + rd_data = readl(regs + DRDU3_U2PHY_CTRL);
> + rd_data &= ~(DRDU3_U2PHY_PCTL_MASK << DRDU3_U2PHY_PCTL_OFFSET);
> + rd_data |= (U2PHY_PCTL_VAL << DRDU3_U2PHY_PCTL_OFFSET);
> + writel(rd_data, regs + DRDU3_U2PHY_CTRL);
> +
> + msleep(300);
> +
> + reg32_setbits(regs + DRDU3_U2PLL_CTRL,
> + DRDU3_U2PLL_RESETB);
> +
> + reg32_setbits(regs + DRDU3_U2PHY_CTRL,
> + DRDU3_U2PHY_RESETB);
> +
> + ret = pll_lock_check(regs + DRDU3_U2PLL_CTRL, DRDU3_U2PLL_LOCK);
> +
> + return ret;
> +}
> +
> +static int drdu3_u3_phy_power_on(void __iomem *regs)
> +{
> + u32 rd_data;
> + int ret = 0;
> +
> + /* Set pctl with mode and soft reset */
> + rd_data = readl(regs + DRDU3_U3PHY_CTRL);
> + rd_data &= ~(DRDU3_U3PHY_PCTL_MASK << DRDU3_U3PHY_PCTL_OFFSET);
> + rd_data |= (U3PHY_PCTL_VAL << DRDU3_U3PHY_PCTL_OFFSET);
> + writel(rd_data, regs + DRDU3_U3PHY_CTRL);
> +
> + reg32_clrbits(regs + DRDU3_U3PHY_PLL_CTRL,
> + DRDU3_U3SSPLL_SUSPEND_EN);
> + reg32_setbits(regs + DRDU3_U3PHY_PLL_CTRL,
> + DRDU3_U3PLL_SEQ_START);
> + reg32_setbits(regs + DRDU3_U3PHY_PLL_CTRL,
> + DRDU3_U3PLL_RESETB);
> +
> + msleep(30);
> +
> + ret = pll_lock_check(regs + DRDU3_U3PHY_PLL_CTRL, DRDU3_U3PLL_SS_LOCK);
> +
> + return ret;
> +}
> +
> +
> +static int drdu2_u2_phy_power_on(void __iomem *regs)
> +{
> + u32 rd_data;
> + int ret = 0;
> +
> + writel(U2PLL_NDIV_INT_VAL, regs + DRDU2_U2PLL_NDIV_INT);
> + writel(U2PLL_NDIV_FRAC_VAL, regs + DRDU2_U2PLL_NDIV_FRAC);
> +
> + rd_data = readl(regs + DRDU2_U2PLL_CTRL);
> + rd_data &= ~(DRDU2_U2PLL_PDIV_MASK << DRDU2_U2PLL_PDIV_OFFSET);
> + rd_data |= (U2PLL_PDIV_VAL << DRDU2_U2PLL_PDIV_OFFSET);
> + writel(rd_data, regs + DRDU2_U2PLL_CTRL);
> +
> + reg32_setbits(regs + DRDU2_PHY_CTRL, DRDU2_U2CTRL_CORERDY);
> +
> + msleep(100);
> + reg32_setbits(regs + DRDU2_U2PLL_CTRL,
> + DRDU2_U2PLL_RESETB);
> +
> + reg32_setbits(regs + DRDU2_PHY_CTRL,
> + DRDU2_U2PHY_RESETB);
> +
> + rd_data = readl(regs + DRDU2_PHY_CTRL);
> + rd_data &= ~(DRDU2_U2PHY_PCTL_MASK << DRDU2_U2PHY_PCTL_OFFSET);
> + rd_data |= (U2PHY_PCTL_VAL << DRDU2_U2PHY_PCTL_OFFSET);
> + writel(rd_data, regs + DRDU2_PHY_CTRL);
> +
> + ret = pll_lock_check(regs + DRDU2_U2PLL_CTRL, DRDU2_U2PLL_LOCK);
> +
> + return ret;
> +}
> +static int sr_u3h_u2drd_phy_reset(struct phy *gphy)
> +{
> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
> + struct sr_usb_phy *p = phy_port->p;
> +
> + switch (phy_port->port_id) {
> + case USB3HS_PORT:
> + reg32_clrbits(p->usb3hreg + USB3H_U2PHY_CTRL,
> + USB3H_U2CTRL_CORERDY);
> + reg32_setbits(p->usb3hreg + USB3H_U2PHY_CTRL,
> + USB3H_U2CTRL_CORERDY);
> + break;
> + case DRDU2_PORT:
> + reg32_clrbits(p->drdu2reg + DRDU2_PHY_CTRL,
> + DRDU2_U2CTRL_CORERDY);
> + reg32_setbits(p->drdu2reg + DRDU2_PHY_CTRL,
> + DRDU2_U2CTRL_CORERDY);
> + break;
> + }
> + return 0;
> +}
> +
> +static int sr_u3drd_phy_reset(struct phy *gphy)
> +{
> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
> + struct sr_usb_phy *p = phy_port->p;
> +
> + switch (phy_port->port_id) {
> + case DRD3HS_PORT:
> + reg32_clrbits(p->drdu3reg + DRDU3_U2PHY_CTRL,
> + DRDU3_U2CTRL_CORERDY);
> + reg32_setbits(p->drdu3reg + DRDU3_U2PHY_CTRL,
> + DRDU3_U2CTRL_CORERDY);
> + break;
> + }
> + return 0;
> +}
> +
> +static int sr_u3h_u2drd_phy_power_on(struct phy *gphy)
> +{
> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
> + struct sr_usb_phy *p = phy_port->p;
> + int ret = 0;
> +
> + switch (phy_port->port_id) {
> + case USB3SS_PORT:
> + reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + USB3H_DISABLE_USB30_P0);
> + ret = usb3h_u3_phy_power_on(p->usb3hreg);
> + if (ret)
> + goto err_usb3h_phy_on;
> + break;
> + case USB3HS_PORT:
> + reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + USB3H_DISABLE_EUSB_P1);
> + ret = usb3h_u2_phy_power_on(p->usb3hreg);
> + if (ret)
> + goto err_usb3h_phy_on;
> +
> + break;
> + case DRDU2_PORT:
> + reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + USB3H_DISABLE_EUSB_P0);
> +
> + ret = drdu2_u2_phy_power_on(p->drdu2reg);
> + if (ret) {
> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + USB3H_DISABLE_EUSB_P0);
> + goto err_drdu2_phy_on;
> + }
> + break;
> + }
> +
> + /* Device Mode */
> + if (phy_port->port_id == DRDU2_PORT) {
> + writel(DRDU2_BDC_AXI_SOFT_RST_N,
> + p->drdu2reg + DRDU2_SOFT_RESET_CTRL);
> + reg32_setbits(p->drdu2reg + DRDU2_PHY_CTRL,
> + DRDU2_U2SOFT_RST_N);
> + }
> + /* Host Mode */
> + writel(USB3H_XHC_AXI_SOFT_RST_N,
> + p->usb3hreg + USB3H_SOFT_RESET_CTRL);
> + reg32_setbits(p->usb3hreg + USB3H_U3PHY_CTRL,
> + USB3H_U3SOFT_RST_N);
> +
> + return 0;
> +err_usb3h_phy_on:
> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + (USB3H_DISABLE_EUSB_P1 |
> + USB3H_DISABLE_USB30_P0));
> +err_drdu2_phy_on:
> +
> + return ret;
> +}
> +
> +static int sr_u3drd_phy_power_on(struct phy *gphy)
> +{
> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
> + struct sr_usb_phy *p = phy_port->p;
> + int ret = 0;
> +
> + switch (phy_port->port_id) {
> + case DRD3SS_PORT:
> + reg32_clrbits(p->drdu3reg + USB3H_PHY_PWR_CTRL,
> + DRDU3_DISABLE_USB30_P0);
> +
> + ret = drdu3_u3_phy_power_on(p->drdu3reg);
> + if (ret)
> + goto err_drdu3_phy_on;
> + break;
> + case DRD3HS_PORT:
> + reg32_clrbits(p->drdu3reg + USB3H_PHY_PWR_CTRL,
> + DRDU3_DISABLE_EUSB_P0);
> + ret = drdu3_u2_phy_power_on(p->drdu3reg);
> + if (ret)
> + goto err_drdu3_phy_on;
> + break;
> + }
> + /* Host Mode */
> + reg32_setbits(p->drdu3reg + DRDU3_SOFT_RESET_CTRL,
> + DRDU3_XHC_AXI_SOFT_RST_N);
> + reg32_setbits(p->drdu3reg + DRDU3_U3PHY_CTRL,
> + DRDU3_U3XHC_SOFT_RST_N);
> + /* Device Mode */
> + reg32_setbits(p->drdu3reg + DRDU3_SOFT_RESET_CTRL,
> + DRDU3_BDC_AXI_SOFT_RST_N);
> + reg32_setbits(p->drdu3reg + DRDU3_U3PHY_CTRL,
> + DRDU3_U3BDC_SOFT_RST_N);
> +
> + return 0;
> +err_drdu3_phy_on:
> + reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
> + (DRDU3_DISABLE_EUSB_P0 |
> + DRDU3_DISABLE_USB30_P0));
> +
> + return ret;
> +}
> +
> +static int sr_u3h_u2drd_phy_power_off(struct phy *gphy)
> +{
> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
> + struct sr_usb_phy *p = phy_port->p;
> +
> + switch (phy_port->port_id) {
> + case USB3SS_PORT:
> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + USB3H_DISABLE_USB30_P0);
> + break;
> + case USB3HS_PORT:
> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + USB3H_DISABLE_EUSB_P1);
> + break;
> + case DRDU2_PORT:
> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
> + USB3H_DISABLE_EUSB_P0);
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int sr_u3drd_phy_power_off(struct phy *gphy)
> +{
> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
> + struct sr_usb_phy *p = phy_port->p;
> +
> + switch (phy_port->port_id) {
> + case DRD3SS_PORT:
> + reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
> + DRDU3_DISABLE_USB30_P0);
> + break;
> + case DRD3HS_PORT:
> + reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
> + DRDU3_DISABLE_EUSB_P0);
> + break;
> + }
> + return 0;
> +}
> +
> +static struct phy_ops sr_u3h_u2drd_phy_ops = {
> + .power_on = sr_u3h_u2drd_phy_power_on,
> + .power_off = sr_u3h_u2drd_phy_power_off,
> + .reset = sr_u3h_u2drd_phy_reset,
> + .owner = THIS_MODULE,
> +};
> +
> +static struct phy_ops sr_u3drd_phy_ops = {
> + .power_on = sr_u3drd_phy_power_on,
> + .power_off = sr_u3drd_phy_power_off,
> + .reset = sr_u3drd_phy_reset,
> + .owner = THIS_MODULE,
> +};
Can you split this patch into 2 so that it's easier to review. 1st patch add
u2drd_phy and then add u3drd_phy.
> +
> +static const struct of_device_id sr_usb_phy_of_match[] = {
> + {
> + .compatible = "brcm,sr-u3h-u2drd-phy",
> + .data = &sr_u3h_u2drd_phy_ops,
> + },
> + {
> + .compatible = "brcm,sr-u3drd-phy",
> + .data = &sr_u3drd_phy_ops,
> + },
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, sr_usb_phy_of_match);
> +
> +static int sr_usb_phy_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct sr_usb_phy *p;
> + struct device_node *dn = dev->of_node, *child;
> + struct resource *res;
> + struct phy *gphy;
> + const struct phy_ops *ops;
> + struct phy_provider *phy_provider;
> + const struct of_device_id *match;
> + struct sr_usb_phy_port *phy_port;
> + uint32_t child_cnt, cnt = 0;
> +
> + match = of_match_node(sr_usb_phy_of_match, dn);
> + if (!match) {
> + dev_err(dev, "of_match_node() failed\n");
> + return -EINVAL;
> + }
> + ops = match->data;
> +
> + child_cnt = of_get_child_count(dn);
> + if (!child_cnt || child_cnt > MAX_NR_PORTS)
> + return -ENODEV;
> +
> + p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
> + if (!p)
> + return -ENOMEM;
> +
> + p->phy_port = devm_kcalloc(dev, child_cnt,
> + sizeof(struct sr_usb_phy_port),
> + GFP_KERNEL);
> + if (!p->phy_port)
> + return -ENOMEM;
> +
> + if (of_device_is_compatible(dn, "brcm,sr-u3h-u2drd-phy")) {
> + void __iomem *drdu2reg, *usb3hreg;
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> + "drdu2");
> + drdu2reg = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(drdu2reg))
> + return PTR_ERR(drdu2reg);
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> + "usb3h");
> + usb3hreg = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(usb3hreg))
> + return PTR_ERR(usb3hreg);
> +
> + p->drdu2reg = drdu2reg;
> + p->usb3hreg = usb3hreg;
> + p->phy_id = USB3H_DRDU2_PHY;
> + }
> + if (of_device_is_compatible(dn, "brcm,sr-u3drd-phy")) {
> + void __iomem *drdu3reg;
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> + "drdu3");
> + drdu3reg = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(drdu3reg))
> + return PTR_ERR(drdu3reg);
> +
> + p->drdu3reg = drdu3reg;
> + p->phy_id = DRDU3_PHY;
> + }
> +
> + for_each_available_child_of_node(dn, child) {
> + phy_port = &p->phy_port[cnt];
> + if (of_property_read_u32(child, "reg", &phy_port->port_id)) {
> + dev_err(dev, "missing reg property in node %s\n",
> + child->name);
> + return -EINVAL;
> + }
> + if (phy_port->port_id >= MAX_NR_PORTS)
> + return -EINVAL;
> +
> + gphy = devm_phy_create(dev, child, ops);
> + if (IS_ERR(gphy))
> + return PTR_ERR(gphy);
> +
> + phy_set_drvdata(gphy, phy_port);
> + dev_set_drvdata(&gphy->dev, phy_port);
why do you need dev_set_drvdata when phy_set_drvdata already saves private data
for you?
Thanks
Kishon
Hi Kishon,
Thank you for the feedback.
I will address all your comments in the next patch set.
Regards,
Srinath.
On Tue, Jul 11, 2017 at 12:01 PM, Kishon Vijay Abraham I <[email protected]> wrote:
> hi,
>
> On Friday 07 July 2017 06:37 PM, Srinath Mannam wrote:
>> USB phy driver for stingray USB DRDU3 and DRDU2/USB3H
>> phy modules
>>
>> Signed-off-by: Srinath Mannam <[email protected]>
>> Reviewed-by: Ray Jui <[email protected]>
>> Reviewed-by: Scott Branden <[email protected]>
>> ---
>> drivers/phy/broadcom/Kconfig | 13 +
>> drivers/phy/broadcom/Makefile | 1 +
>> drivers/phy/broadcom/phy-bcm-stingray-usb.c | 722 ++++++++++++++++++++++++++++
>> 3 files changed, 736 insertions(+)
>> create mode 100644 drivers/phy/broadcom/phy-bcm-stingray-usb.c
>>
>> diff --git a/drivers/phy/broadcom/Kconfig b/drivers/phy/broadcom/Kconfig
>> index 37371b8..185a84b 100644
>> --- a/drivers/phy/broadcom/Kconfig
>> +++ b/drivers/phy/broadcom/Kconfig
>> @@ -58,6 +58,19 @@ config PHY_NS2_USB_DRD
>>
>> If unsure, say N.
>>
>> +config PHY_STINGRAY_USB
>> + tristate "Broadcom Stingray USB2 DRD PHY driver"
>> + depends on OF && (ARCH_BCM_IPROC || COMPILE_TEST)
>> + select GENERIC_PHY
>> + default ARCH_BCM_IPROC
>> + help
>> + Enable this to support the Broadcom Stingray USB PHY for DRDU3,
>> + DRDU2 and USB3H.
>> + This driver initializes the PHY which can be used in both
>> + Host and Device modes.
>> +
>> + If unsure, say N.
>> +
>> config PHY_BRCM_SATA
>> tristate "Broadcom SATA PHY driver"
>> depends on ARCH_BRCMSTB || ARCH_BCM_IPROC || BMIPS_GENERIC || COMPILE_TEST
>> diff --git a/drivers/phy/broadcom/Makefile b/drivers/phy/broadcom/Makefile
>> index 4eb82ec..78c1033 100644
>> --- a/drivers/phy/broadcom/Makefile
>> +++ b/drivers/phy/broadcom/Makefile
>> @@ -4,4 +4,5 @@ obj-$(CONFIG_PHY_BCM_NS_USB2) += phy-bcm-ns-usb2.o
>> obj-$(CONFIG_PHY_BCM_NS_USB3) += phy-bcm-ns-usb3.o
>> obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
>> obj-$(CONFIG_PHY_NS2_USB_DRD) += phy-bcm-ns2-usbdrd.o
>> +obj-$(CONFIG_PHY_STINGRAY_USB) += phy-bcm-stingray-usb.o
>> obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
>> diff --git a/drivers/phy/broadcom/phy-bcm-stingray-usb.c b/drivers/phy/broadcom/phy-bcm-stingray-usb.c
>> new file mode 100644
>> index 0000000..03603fd
>> --- /dev/null
>> +++ b/drivers/phy/broadcom/phy-bcm-stingray-usb.c
>> @@ -0,0 +1,722 @@
>> +/*
>> + * Copyright (C) 2017 Broadcom
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation version 2.
>> + *
>> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
>> + * kind, whether express or implied; without even the implied warranty
>> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> + * GNU General Public License for more details.
>> + */
>> +
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/platform_device.h>
>> +
>> +#define DRDU2_U2PLL_NDIV_FRAC 0x0
>> +
>> +#define DRDU2_U2PLL_NDIV_INT 0x4
>> +
>> +#define DRDU2_U2PLL_CTRL 0x8
>> +#define DRDU2_U2PLL_LOCK BIT(6)
>> +#define DRDU2_U2PLL_RESETB BIT(5)
>> +#define DRDU2_U2PLL_PDIV_MASK 0xF
>> +#define DRDU2_U2PLL_PDIV_OFFSET 1
>> +#define DRDU2_U2PLL_SUSPEND_EN BIT(0)
>> +
>> +#define DRDU2_PHY_CTRL 0x0C
>> +#define DRDU2_U2IDDQ BIT(30)
>> +#define DRDU2_U2SOFT_RST_N BIT(29)
>> +#define DRDU2_U2PHY_ON_FLAG BIT(22)
>> +#define DRDU2_U2PHY_PCTL_MASK 0xFFFF
>> +#define DRDU2_U2PHY_PCTL_OFFSET 6
>> +#define DRDU2_U2PHY_RESETB BIT(5)
>> +#define DRDU2_U2PHY_ISO BIT(4)
>> +#define DRDU2_U2AFE_BG_PWRDWNB BIT(3)
>> +#define DRDU2_U2AFE_PLL_PWRDWNB BIT(2)
>> +#define DRDU2_U2AFE_LDO_PWRDWNB BIT(1)
>> +#define DRDU2_U2CTRL_CORERDY BIT(0)
>> +
>> +#define DRDU2_STRAP_CTRL 0x18
>> +#define DRDU2_FORCE_HOST_MODE BIT(5)
>> +#define DRDU2_FORCE_DEVICE_MODE BIT(4)
>> +#define BDC_USB_STP_SPD_MASK 0x7
>> +#define BDC_USB_STP_SPD_OFFSET 0
>> +
>> +#define DRDU2_PWR_CTRL 0x1C
>> +#define DRDU2_U2PHY_DFE_SWITCH_PWROKIN_I BIT(2)
>> +#define DRDU2_U2PHY_DFE_SWITCH_PWRONIN_I BIT(1)
>> +
>> +#define DRDU2_SOFT_RESET_CTRL 0x20
>> +#define DRDU2_BDC_AXI_SOFT_RST_N BIT(0)
>> +
>> +#define USB3H_U2PLL_NDIV_FRAC 0x4
>> +
>> +#define USB3H_U2PLL_NDIV_INT 0x8
>> +
>> +#define USB3H_U2PLL_CTRL 0xC
>> +#define USB3H_U2PLL_LOCK BIT(6)
>> +#define USB3H_U2PLL_RESETB BIT(5)
>> +#define USB3H_U2PLL_PDIV_MASK 0xF
>> +#define USB3H_U2PLL_PDIV_OFFSET 1
>> +
>> +#define USB3H_U2PHY_CTRL 0x10
>> +#define USB3H_U2PHY_ON_FLAG 22
>> +#define USB3H_U2PHY_PCTL_MASK 0xFFFF
>> +#define USB3H_U2PHY_PCTL_OFFSET 6
>> +#define USB3H_U2PHY_RESETB BIT(5)
>> +#define USB3H_U2PHY_ISO BIT(4)
>> +#define USB3H_U2AFE_BG_PWRDWNB BIT(3)
>> +#define USB3H_U2AFE_PLL_PWRDWNB BIT(2)
>> +#define USB3H_U2AFE_LDO_PWRDWNB BIT(1)
>> +#define USB3H_U2CTRL_CORERDY BIT(0)
>> +
>> +#define USB3H_U3PHY_CTRL 0x14
>> +#define USB3H_U3SOFT_RST_N BIT(30)
>> +#define USB3H_U3MDIO_RESETB_I BIT(29)
>> +#define USB3H_U3POR_RESET_I BIT(28)
>> +#define USB3H_U3PHY_PCTL_MASK 0xFFFF
>> +#define USB3H_U3PHY_PCTL_OFFSET 2
>> +#define USB3H_U3PHY_RESETB BIT(1)
>> +
>> +#define USB3H_U3PHY_PLL_CTRL 0x18
>> +#define USB3H_U3PLL_REFCLK_MASK 0x7
>> +#define USB3H_U3PLL_REFCLK_OFFSET 4
>> +#define USB3H_U3PLL_SS_LOCK BIT(3)
>> +#define USB3H_U3PLL_SEQ_START BIT(2)
>> +#define USB3H_U3SSPLL_SUSPEND_EN BIT(1)
>> +#define USB3H_U3PLL_RESETB BIT(0)
>> +
>> +#define USB3H_PWR_CTRL 0x28
>> +#define USB3H_PWR_CTRL_OVERRIDE_I_R 4
>> +
>> +#define USB3H_SOFT_RESET_CTRL 0x2C
>> +#define USB3H_XHC_AXI_SOFT_RST_N BIT(1)
>> +
>> +#define USB3H_PHY_PWR_CTRL 0x38
>> +#define USB3H_DISABLE_USB30_P0 BIT(2)
>> +#define USB3H_DISABLE_EUSB_P1 BIT(1)
>> +#define USB3H_DISABLE_EUSB_P0 BIT(0)
>> +
>> +
>> +#define DRDU3_U2PLL_NDIV_FRAC 0x4
>> +
>> +#define DRDU3_U2PLL_NDIV_INT 0x8
>> +
>> +#define DRDU3_U2PLL_CTRL 0xC
>> +#define DRDU3_U2PLL_LOCK BIT(6)
>> +#define DRDU3_U2PLL_RESETB BIT(5)
>> +#define DRDU3_U2PLL_PDIV_MASK 0xF
>> +#define DRDU3_U2PLL_PDIV_OFFSET 1
>> +
>> +#define DRDU3_U2PHY_CTRL 0x10
>> +#define DRDU3_U2PHY_ON_FLAG BIT(22)
>> +#define DRDU3_U2PHY_PCTL_MASK 0xFFFF
>> +#define DRDU3_U2PHY_PCTL_OFFSET 6
>> +#define DRDU3_U2PHY_RESETB BIT(5)
>> +#define DRDU3_U2PHY_ISO BIT(4)
>> +#define DRDU3_U2AFE_BG_PWRDWNB BIT(3)
>> +#define DRDU3_U2AFE_PLL_PWRDWNB BIT(2)
>> +#define DRDU3_U2AFE_LDO_PWRDWNB BIT(1)
>> +#define DRDU3_U2CTRL_CORERDY BIT(0)
>> +
>> +#define DRDU3_U3PHY_CTRL 0x14
>> +#define DRDU3_U3XHC_SOFT_RST_N BIT(31)
>> +#define DRDU3_U3BDC_SOFT_RST_N BIT(30)
>> +#define DRDU3_U3MDIO_RESETB_I BIT(29)
>> +#define DRDU3_U3POR_RESET_I BIT(28)
>> +#define DRDU3_U3PHY_PCTL_MASK 0xFFFF
>> +#define DRDU3_U3PHY_PCTL_OFFSET 2
>> +#define DRDU3_U3PHY_RESETB BIT(1)
>> +
>> +#define DRDU3_U3PHY_PLL_CTRL 0x18
>> +#define DRDU3_U3PLL_REFCLK_MASK 0x7
>> +#define DRDU3_U3PLL_REFCLK_OFFSET 4
>> +#define DRDU3_U3PLL_SS_LOCK BIT(3)
>> +#define DRDU3_U3PLL_SEQ_START BIT(2)
>> +#define DRDU3_U3SSPLL_SUSPEND_EN BIT(1)
>> +#define DRDU3_U3PLL_RESETB BIT(0)
>> +
>> +#define DRDU3_STRAP_CTRL 0x28
>> +#define BDC_USB_STP_SPD_MASK 0x7
>> +#define BDC_USB_STP_SPD_OFFSET 0
>> +#define BDC_USB_STP_SPD_SS 0x0
>> +#define BDC_USB_STP_SPD_HS 0x2
>> +
>> +#define DRDU3_PWR_CTRL 0x2c
>> +#define DRDU3_PWR_CTRL_OVERRIDE_I_R 4
>> +
>> +#define DRDU3_SOFT_RESET_CTRL 0x30
>> +#define DRDU3_XHC_AXI_SOFT_RST_N BIT(1)
>> +#define DRDU3_BDC_AXI_SOFT_RST_N BIT(0)
>> +
>> +#define DRDU3_PHY_PWR_CTRL 0x3c
>> +#define DRDU3_DISABLE_USB30_P0 BIT(2)
>> +#define DRDU3_DISABLE_EUSB_P1 BIT(1)
>> +#define DRDU3_DISABLE_EUSB_P0 BIT(0)
>> +
>> +#define PLL_REFCLK_PAD 0x0
>> +#define PLL_REFCLK_25MHZ 0x1
>> +#define PLL_REFCLK_96MHZ 0x2
>> +#define PLL_REFCLK_INTERNAL 0x3
>> +#define PLL_LOCK_RETRY_COUNT 1000
>> +
>> +
>> +#define U2PLL_NDIV_INT_VAL 0x13
>> +#define U2PLL_NDIV_FRAC_VAL 0x1005
>> +#define U2PLL_PDIV_VAL 0x1
>> +/*
>> + * 0x0806 of PCTL_VAL has below bits set
>> + * BIT-8 : refclk divider 1
>> + * BIT-3:2: device mode; mode is not effect
>> + * BIT-1: soft reset active low
>> + */
>> +#define U2PHY_PCTL_VAL 0x0806
>> +#define U3PHY_PCTL_VAL 0x0006
>> +
>> +#define MAX_NR_PORTS 3
>> +
>> +#define USB3H_DRDU2_PHY 1
>> +#define DRDU3_PHY 2
>> +
>> +#define USB_HOST_MODE 1
>> +#define USB_DEV_MODE 2
>> +
>> +#define USB3SS_PORT 0
>> +#define DRDU2_PORT 1
>> +#define USB3HS_PORT 2
>> +
>> +#define DRD3SS_PORT 0
>> +#define DRD3HS_PORT 1
>> +
>> +struct sr_usb_phy {
>> + void __iomem *drdu2reg;
>> + void __iomem *usb3hreg;
>> + void __iomem *drdu3reg;
>> + uint32_t phy_id;
>> + struct sr_usb_phy_port *phy_port;
>> +};
>> +
>> +struct sr_usb_phy_port {
>> + uint32_t port_id;
>> + uint32_t mode;
>> + struct phy *gphy;
>> + struct sr_usb_phy *p;
>> +};
>> +
>> +static inline void reg32_clrbits(void __iomem *addr, uint32_t clear)
>> +{
>> + writel(readl(addr) & ~clear, addr);
> > +}
>> +
>> +static inline void reg32_setbits(void __iomem *addr, uint32_t set)
>> +{
>> + writel(readl(addr) | set, addr);
>> +}
>> +
>> +static int pll_lock_check(void __iomem *addr, u32 bit)
>> +{
>> + int retry;
>> + u32 rd_data;
>> +
>> + retry = PLL_LOCK_RETRY_COUNT;
>> + do {
>> + rd_data = readl(addr);
>> + if (rd_data & bit)
>> + return 0;
>> + udelay(1);
>> + } while (--retry > 0);
>> +
>> + pr_err("%s: FAIL\n", __func__);
>> + return -ETIMEDOUT;
>> +}
>
> It would be nice if you can prefix all functions with bcm_usb.
>> +
>> +static struct phy *bcm_usb_phy_xlate(struct device *dev,
>> + struct of_phandle_args *args)
>> +{
>> + struct sr_usb_phy_port *phy_port = dev_get_drvdata(dev);
>> + struct sr_usb_phy *p;
>> +
>> + if (!phy_port)
>> + return ERR_PTR(-EINVAL);
>> +
>> + p = phy_port->p;
>> +
>> + if (WARN_ON(args->args[0] < 1 || args->args[0] > 2))
>
> Please use constant enums. I think here it means
> PHY_MODE_USB_HOST/PHY_MODE_USB_DEVICE?
>> + return ERR_PTR(-EINVAL);
>> +
>> + if (WARN_ON(args->args_count < 1))
>> + return ERR_PTR(-EINVAL);
>> +
>> + if ((p->phy_id == USB3H_DRDU2_PHY) && (phy_port->port_id == 0) &&
>> + (args->args[0] == USB_DEV_MODE))
>> + return ERR_PTR(-EINVAL);
>
> port 0 cannot be used for host mode? How about other ports?
>> +
>> + phy_port->mode |= args->args[0];
>
> When is this mode used? If mode is never used, then this custom xlate is not
> required at all.
>> +
>> + return phy_port->gphy;
>> +}
>> +
>> +static int usb3h_u2_phy_power_on(void __iomem *regs)
>> +{
>> + u32 rd_data;
>> + int ret = 0;
>> +
>> + /* Set Core Ready high */
>> + reg32_setbits(regs + USB3H_U2PHY_CTRL, USB3H_U2CTRL_CORERDY);
>> + msleep(100);
>
> That looks like a huge delay? Is it really necessary
>> +
>> + rd_data = readl(regs + USB3H_U2PHY_CTRL);
>> + rd_data &= ~(USB3H_U2PHY_PCTL_MASK << USB3H_U2PHY_PCTL_OFFSET);
>> + rd_data |= (U2PHY_PCTL_VAL << USB3H_U2PHY_PCTL_OFFSET);
>> + writel(rd_data, regs + USB3H_U2PHY_CTRL);
>> +
>> + msleep(300);
>
> one more here.
>> + reg32_setbits(regs + USB3H_U2PLL_CTRL,
>> + USB3H_U2PLL_RESETB);
>> +
>> + reg32_setbits(regs + USB3H_U2PHY_CTRL,
>> + USB3H_U2PHY_RESETB);
>> +
>> + ret = pll_lock_check(regs + USB3H_U2PLL_CTRL, USB3H_U2PLL_LOCK);
>> +
>> + return ret;
>> +}
>> +
>> +
>> +static int usb3h_u3_phy_power_on(void __iomem *regs)
>> +{
>> + u32 rd_data;
>> + int ret = 0;
>> +
>> + /* Set pctl with mode and soft reset */
>> + rd_data = readl(regs + USB3H_U3PHY_CTRL);
>> + rd_data &= ~(USB3H_U3PHY_PCTL_MASK << USB3H_U3PHY_PCTL_OFFSET);
>> + rd_data |= (U3PHY_PCTL_VAL << USB3H_U3PHY_PCTL_OFFSET);
>> + writel(rd_data, regs + USB3H_U3PHY_CTRL);
>> +
>> + reg32_clrbits(regs + USB3H_U3PHY_PLL_CTRL,
>> + USB3H_U3SSPLL_SUSPEND_EN);
>> + reg32_setbits(regs + USB3H_U3PHY_PLL_CTRL,
>> + USB3H_U3PLL_SEQ_START);
>> + reg32_setbits(regs + USB3H_U3PHY_PLL_CTRL,
>> + USB3H_U3PLL_RESETB);
>> +
>> + msleep(30);
>> +
>> + ret = pll_lock_check(regs + USB3H_U3PHY_PLL_CTRL, USB3H_U3PLL_SS_LOCK);
>> +
>> + return ret;
>> +}
>> +
>> +
>> +static int drdu3_u2_phy_power_on(void __iomem *regs)
>> +{
>> + u32 rd_data;
>> + int ret = 0;
>> +
>> + /* Set Core Ready high */
>> + reg32_setbits(regs + DRDU3_U2PHY_CTRL, DRDU3_U2CTRL_CORERDY);
>> +
>> + msleep(100);
>> +
>> + rd_data = readl(regs + DRDU3_STRAP_CTRL);
>> + rd_data &= (~(BDC_USB_STP_SPD_MASK << BDC_USB_STP_SPD_OFFSET));
>> + rd_data |= (BDC_USB_STP_SPD_SS << BDC_USB_STP_SPD_OFFSET);
>> + writel(rd_data, regs + DRDU3_STRAP_CTRL);
>> +
>> + rd_data = readl(regs + DRDU3_U2PHY_CTRL);
>> + rd_data &= ~(DRDU3_U2PHY_PCTL_MASK << DRDU3_U2PHY_PCTL_OFFSET);
>> + rd_data |= (U2PHY_PCTL_VAL << DRDU3_U2PHY_PCTL_OFFSET);
>> + writel(rd_data, regs + DRDU3_U2PHY_CTRL);
>> +
>> + msleep(300);
>> +
>> + reg32_setbits(regs + DRDU3_U2PLL_CTRL,
>> + DRDU3_U2PLL_RESETB);
>> +
>> + reg32_setbits(regs + DRDU3_U2PHY_CTRL,
>> + DRDU3_U2PHY_RESETB);
>> +
>> + ret = pll_lock_check(regs + DRDU3_U2PLL_CTRL, DRDU3_U2PLL_LOCK);
>> +
>> + return ret;
>> +}
>> +
>> +static int drdu3_u3_phy_power_on(void __iomem *regs)
>> +{
>> + u32 rd_data;
>> + int ret = 0;
>> +
>> + /* Set pctl with mode and soft reset */
>> + rd_data = readl(regs + DRDU3_U3PHY_CTRL);
>> + rd_data &= ~(DRDU3_U3PHY_PCTL_MASK << DRDU3_U3PHY_PCTL_OFFSET);
>> + rd_data |= (U3PHY_PCTL_VAL << DRDU3_U3PHY_PCTL_OFFSET);
>> + writel(rd_data, regs + DRDU3_U3PHY_CTRL);
>> +
>> + reg32_clrbits(regs + DRDU3_U3PHY_PLL_CTRL,
>> + DRDU3_U3SSPLL_SUSPEND_EN);
>> + reg32_setbits(regs + DRDU3_U3PHY_PLL_CTRL,
>> + DRDU3_U3PLL_SEQ_START);
>> + reg32_setbits(regs + DRDU3_U3PHY_PLL_CTRL,
>> + DRDU3_U3PLL_RESETB);
>> +
>> + msleep(30);
>> +
>> + ret = pll_lock_check(regs + DRDU3_U3PHY_PLL_CTRL, DRDU3_U3PLL_SS_LOCK);
>> +
>> + return ret;
>> +}
>> +
>> +
>> +static int drdu2_u2_phy_power_on(void __iomem *regs)
>> +{
>> + u32 rd_data;
>> + int ret = 0;
>> +
>> + writel(U2PLL_NDIV_INT_VAL, regs + DRDU2_U2PLL_NDIV_INT);
>> + writel(U2PLL_NDIV_FRAC_VAL, regs + DRDU2_U2PLL_NDIV_FRAC);
>> +
>> + rd_data = readl(regs + DRDU2_U2PLL_CTRL);
>> + rd_data &= ~(DRDU2_U2PLL_PDIV_MASK << DRDU2_U2PLL_PDIV_OFFSET);
>> + rd_data |= (U2PLL_PDIV_VAL << DRDU2_U2PLL_PDIV_OFFSET);
>> + writel(rd_data, regs + DRDU2_U2PLL_CTRL);
>> +
>> + reg32_setbits(regs + DRDU2_PHY_CTRL, DRDU2_U2CTRL_CORERDY);
>> +
>> + msleep(100);
>> + reg32_setbits(regs + DRDU2_U2PLL_CTRL,
>> + DRDU2_U2PLL_RESETB);
>> +
>> + reg32_setbits(regs + DRDU2_PHY_CTRL,
>> + DRDU2_U2PHY_RESETB);
>> +
>> + rd_data = readl(regs + DRDU2_PHY_CTRL);
>> + rd_data &= ~(DRDU2_U2PHY_PCTL_MASK << DRDU2_U2PHY_PCTL_OFFSET);
>> + rd_data |= (U2PHY_PCTL_VAL << DRDU2_U2PHY_PCTL_OFFSET);
>> + writel(rd_data, regs + DRDU2_PHY_CTRL);
>> +
>> + ret = pll_lock_check(regs + DRDU2_U2PLL_CTRL, DRDU2_U2PLL_LOCK);
>> +
>> + return ret;
>> +}
>> +static int sr_u3h_u2drd_phy_reset(struct phy *gphy)
>> +{
>> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
>> + struct sr_usb_phy *p = phy_port->p;
>> +
>> + switch (phy_port->port_id) {
>> + case USB3HS_PORT:
>> + reg32_clrbits(p->usb3hreg + USB3H_U2PHY_CTRL,
>> + USB3H_U2CTRL_CORERDY);
>> + reg32_setbits(p->usb3hreg + USB3H_U2PHY_CTRL,
>> + USB3H_U2CTRL_CORERDY);
>> + break;
>> + case DRDU2_PORT:
>> + reg32_clrbits(p->drdu2reg + DRDU2_PHY_CTRL,
>> + DRDU2_U2CTRL_CORERDY);
>> + reg32_setbits(p->drdu2reg + DRDU2_PHY_CTRL,
>> + DRDU2_U2CTRL_CORERDY);
>> + break;
>> + }
>> + return 0;
>> +}
>> +
>> +static int sr_u3drd_phy_reset(struct phy *gphy)
>> +{
>> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
>> + struct sr_usb_phy *p = phy_port->p;
>> +
>> + switch (phy_port->port_id) {
>> + case DRD3HS_PORT:
>> + reg32_clrbits(p->drdu3reg + DRDU3_U2PHY_CTRL,
>> + DRDU3_U2CTRL_CORERDY);
>> + reg32_setbits(p->drdu3reg + DRDU3_U2PHY_CTRL,
>> + DRDU3_U2CTRL_CORERDY);
>> + break;
>> + }
>> + return 0;
>> +}
>> +
>> +static int sr_u3h_u2drd_phy_power_on(struct phy *gphy)
>> +{
>> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
>> + struct sr_usb_phy *p = phy_port->p;
>> + int ret = 0;
>> +
>> + switch (phy_port->port_id) {
>> + case USB3SS_PORT:
>> + reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + USB3H_DISABLE_USB30_P0);
>> + ret = usb3h_u3_phy_power_on(p->usb3hreg);
>> + if (ret)
>> + goto err_usb3h_phy_on;
>> + break;
>> + case USB3HS_PORT:
>> + reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + USB3H_DISABLE_EUSB_P1);
>> + ret = usb3h_u2_phy_power_on(p->usb3hreg);
>> + if (ret)
>> + goto err_usb3h_phy_on;
>> +
>> + break;
>> + case DRDU2_PORT:
>> + reg32_clrbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + USB3H_DISABLE_EUSB_P0);
>> +
>> + ret = drdu2_u2_phy_power_on(p->drdu2reg);
>> + if (ret) {
>> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + USB3H_DISABLE_EUSB_P0);
>> + goto err_drdu2_phy_on;
>> + }
>> + break;
>> + }
>> +
>> + /* Device Mode */
>> + if (phy_port->port_id == DRDU2_PORT) {
>> + writel(DRDU2_BDC_AXI_SOFT_RST_N,
>> + p->drdu2reg + DRDU2_SOFT_RESET_CTRL);
>> + reg32_setbits(p->drdu2reg + DRDU2_PHY_CTRL,
>> + DRDU2_U2SOFT_RST_N);
>> + }
>> + /* Host Mode */
>> + writel(USB3H_XHC_AXI_SOFT_RST_N,
>> + p->usb3hreg + USB3H_SOFT_RESET_CTRL);
>> + reg32_setbits(p->usb3hreg + USB3H_U3PHY_CTRL,
>> + USB3H_U3SOFT_RST_N);
>> +
>> + return 0;
>> +err_usb3h_phy_on:
>> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + (USB3H_DISABLE_EUSB_P1 |
>> + USB3H_DISABLE_USB30_P0));
>> +err_drdu2_phy_on:
>> +
>> + return ret;
>> +}
>> +
>> +static int sr_u3drd_phy_power_on(struct phy *gphy)
>> +{
>> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
>> + struct sr_usb_phy *p = phy_port->p;
>> + int ret = 0;
>> +
>> + switch (phy_port->port_id) {
>> + case DRD3SS_PORT:
>> + reg32_clrbits(p->drdu3reg + USB3H_PHY_PWR_CTRL,
>> + DRDU3_DISABLE_USB30_P0);
>> +
>> + ret = drdu3_u3_phy_power_on(p->drdu3reg);
>> + if (ret)
>> + goto err_drdu3_phy_on;
>> + break;
>> + case DRD3HS_PORT:
>> + reg32_clrbits(p->drdu3reg + USB3H_PHY_PWR_CTRL,
>> + DRDU3_DISABLE_EUSB_P0);
>> + ret = drdu3_u2_phy_power_on(p->drdu3reg);
>> + if (ret)
>> + goto err_drdu3_phy_on;
>> + break;
>> + }
>> + /* Host Mode */
>> + reg32_setbits(p->drdu3reg + DRDU3_SOFT_RESET_CTRL,
>> + DRDU3_XHC_AXI_SOFT_RST_N);
>> + reg32_setbits(p->drdu3reg + DRDU3_U3PHY_CTRL,
>> + DRDU3_U3XHC_SOFT_RST_N);
>> + /* Device Mode */
>> + reg32_setbits(p->drdu3reg + DRDU3_SOFT_RESET_CTRL,
>> + DRDU3_BDC_AXI_SOFT_RST_N);
>> + reg32_setbits(p->drdu3reg + DRDU3_U3PHY_CTRL,
>> + DRDU3_U3BDC_SOFT_RST_N);
>> +
>> + return 0;
>> +err_drdu3_phy_on:
>> + reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
>> + (DRDU3_DISABLE_EUSB_P0 |
>> + DRDU3_DISABLE_USB30_P0));
>> +
>> + return ret;
>> +}
>> +
>> +static int sr_u3h_u2drd_phy_power_off(struct phy *gphy)
>> +{
>> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
>> + struct sr_usb_phy *p = phy_port->p;
>> +
>> + switch (phy_port->port_id) {
>> + case USB3SS_PORT:
>> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + USB3H_DISABLE_USB30_P0);
>> + break;
>> + case USB3HS_PORT:
>> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + USB3H_DISABLE_EUSB_P1);
>> + break;
>> + case DRDU2_PORT:
>> + reg32_setbits(p->usb3hreg + USB3H_PHY_PWR_CTRL,
>> + USB3H_DISABLE_EUSB_P0);
>> + break;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int sr_u3drd_phy_power_off(struct phy *gphy)
>> +{
>> + struct sr_usb_phy_port *phy_port = phy_get_drvdata(gphy);
>> + struct sr_usb_phy *p = phy_port->p;
>> +
>> + switch (phy_port->port_id) {
>> + case DRD3SS_PORT:
>> + reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
>> + DRDU3_DISABLE_USB30_P0);
>> + break;
>> + case DRD3HS_PORT:
>> + reg32_setbits(p->drdu3reg + DRDU3_PHY_PWR_CTRL,
>> + DRDU3_DISABLE_EUSB_P0);
>> + break;
>> + }
>> + return 0;
>> +}
>> +
>> +static struct phy_ops sr_u3h_u2drd_phy_ops = {
>> + .power_on = sr_u3h_u2drd_phy_power_on,
>> + .power_off = sr_u3h_u2drd_phy_power_off,
>> + .reset = sr_u3h_u2drd_phy_reset,
>> + .owner = THIS_MODULE,
>> +};
>> +
>> +static struct phy_ops sr_u3drd_phy_ops = {
>> + .power_on = sr_u3drd_phy_power_on,
>> + .power_off = sr_u3drd_phy_power_off,
>> + .reset = sr_u3drd_phy_reset,
>> + .owner = THIS_MODULE,
>> +};
>
> Can you split this patch into 2 so that it's easier to review. 1st patch add
> u2drd_phy and then add u3drd_phy.
>> +
>> +static const struct of_device_id sr_usb_phy_of_match[] = {
>> + {
>> + .compatible = "brcm,sr-u3h-u2drd-phy",
>> + .data = &sr_u3h_u2drd_phy_ops,
>> + },
>> + {
>> + .compatible = "brcm,sr-u3drd-phy",
>> + .data = &sr_u3drd_phy_ops,
>> + },
>> + { /* sentinel */ },
>> +};
>> +MODULE_DEVICE_TABLE(of, sr_usb_phy_of_match);
>> +
>> +static int sr_usb_phy_probe(struct platform_device *pdev)
>> +{
>> + struct device *dev = &pdev->dev;
>> + struct sr_usb_phy *p;
>> + struct device_node *dn = dev->of_node, *child;
>> + struct resource *res;
>> + struct phy *gphy;
>> + const struct phy_ops *ops;
>> + struct phy_provider *phy_provider;
>> + const struct of_device_id *match;
>> + struct sr_usb_phy_port *phy_port;
>> + uint32_t child_cnt, cnt = 0;
>> +
>> + match = of_match_node(sr_usb_phy_of_match, dn);
>> + if (!match) {
>> + dev_err(dev, "of_match_node() failed\n");
>> + return -EINVAL;
>> + }
>> + ops = match->data;
>> +
>> + child_cnt = of_get_child_count(dn);
>> + if (!child_cnt || child_cnt > MAX_NR_PORTS)
>> + return -ENODEV;
>> +
>> + p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
>> + if (!p)
>> + return -ENOMEM;
>> +
>> + p->phy_port = devm_kcalloc(dev, child_cnt,
>> + sizeof(struct sr_usb_phy_port),
>> + GFP_KERNEL);
>> + if (!p->phy_port)
>> + return -ENOMEM;
>> +
>> + if (of_device_is_compatible(dn, "brcm,sr-u3h-u2drd-phy")) {
>> + void __iomem *drdu2reg, *usb3hreg;
>> +
>> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
>> + "drdu2");
>> + drdu2reg = devm_ioremap_resource(&pdev->dev, res);
>> + if (IS_ERR(drdu2reg))
>> + return PTR_ERR(drdu2reg);
>> +
>> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
>> + "usb3h");
>> + usb3hreg = devm_ioremap_resource(&pdev->dev, res);
>> + if (IS_ERR(usb3hreg))
>> + return PTR_ERR(usb3hreg);
>> +
>> + p->drdu2reg = drdu2reg;
>> + p->usb3hreg = usb3hreg;
>> + p->phy_id = USB3H_DRDU2_PHY;
>> + }
>> + if (of_device_is_compatible(dn, "brcm,sr-u3drd-phy")) {
>> + void __iomem *drdu3reg;
>> +
>> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
>> + "drdu3");
>> + drdu3reg = devm_ioremap_resource(&pdev->dev, res);
>> + if (IS_ERR(drdu3reg))
>> + return PTR_ERR(drdu3reg);
>> +
>> + p->drdu3reg = drdu3reg;
>> + p->phy_id = DRDU3_PHY;
>> + }
>> +
>> + for_each_available_child_of_node(dn, child) {
>> + phy_port = &p->phy_port[cnt];
>> + if (of_property_read_u32(child, "reg", &phy_port->port_id)) {
>> + dev_err(dev, "missing reg property in node %s\n",
>> + child->name);
>> + return -EINVAL;
>> + }
>> + if (phy_port->port_id >= MAX_NR_PORTS)
>> + return -EINVAL;
>> +
>> + gphy = devm_phy_create(dev, child, ops);
>> + if (IS_ERR(gphy))
>> + return PTR_ERR(gphy);
>> +
>> + phy_set_drvdata(gphy, phy_port);
>> + dev_set_drvdata(&gphy->dev, phy_port);
>
> why do you need dev_set_drvdata when phy_set_drvdata already saves private data
> for you?
>
> Thanks
> Kishon
Hi Srinath, Ray,
On Fri, Jul 07, 2017 at 06:37:04PM +0530, Srinath Mannam wrote:
> Add DT binding document for stingray usb phy driver.
>
> Signed-off-by: Srinath Mannam <[email protected]>
> Reviewed-by: Ray Jui <[email protected]>
> Acked-by: Rob Herring <[email protected]>
The Broadcom Vulcan chip (now Cavium ThunderX2) uses the same USB PHY
from what I understand. Our hardware team reports that there are some
failures seen without the a custom PHY driver.
Do you require this PHY driver on regular operation on Stingray? Or is
this for some specific functionality? I am asking since the issue
reported here is on switching between a USB 3.0 and USB 2.0 devices.
Any plans on submitting this driver again?
Thanks,
JC
Hi JC,
On Tue, Aug 14, 2018 at 7:24 AM, Jayachandran C
<[email protected]> wrote:
> Hi Srinath, Ray,
>
> On Fri, Jul 07, 2017 at 06:37:04PM +0530, Srinath Mannam wrote:
>> Add DT binding document for stingray usb phy driver.
>>
>> Signed-off-by: Srinath Mannam <[email protected]>
>> Reviewed-by: Ray Jui <[email protected]>
>> Acked-by: Rob Herring <[email protected]>
>
> The Broadcom Vulcan chip (now Cavium ThunderX2) uses the same USB PHY
> from what I understand. Our hardware team reports that there are some
> failures seen without the a custom PHY driver.
>
> Do you require this PHY driver on regular operation on Stingray? Or is
> this for some specific functionality? I am asking since the issue
> reported here is on switching between a USB 3.0 and USB 2.0 devices.
We need it for regular operation in stingray.
>
> Any plans on submitting this driver again?
I will submit it ASAP.
Regards,
Srinath.
>
> Thanks,
> JC