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Subject[PATCH 2/2] phy: Add stingray usb phy driver
Date
USB phy driver for stingray USB DRDU3 and DRDU2/USB3H
phy modules

Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
---
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
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  Last update: 2017-07-07 15:08    [W:0.079 / U:32.512 seconds]
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