diff options
Diffstat (limited to 'drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c')
| -rw-r--r-- | drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c new file mode 100644 index 000000000000..0bd9ccc43323 --- /dev/null +++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018, Broadcom */ + +/* + * This module contains USB PHY initialization for power up and S3 resume + * for newer Synopsys based USB hardware first used on the bcm7216. + */ + +#include <linux/delay.h> +#include <linux/io.h> + +#include <linux/soc/brcmstb/brcmstb.h> +#include "phy-brcm-usb-init.h" + +/* Register definitions for the USB CTRL block */ +#define USB_CTRL_SETUP 0x00 +#define USB_CTRL_SETUP_STRAP_IPP_SEL_MASK 0x02000000 +#define USB_CTRL_SETUP_SCB2_EN_MASK 0x00008000 +#define USB_CTRL_SETUP_SCB1_EN_MASK 0x00004000 +#define USB_CTRL_SETUP_SOFT_SHUTDOWN_MASK 0x00000200 +#define USB_CTRL_SETUP_IPP_MASK 0x00000020 +#define USB_CTRL_SETUP_IOC_MASK 0x00000010 +#define USB_CTRL_USB_PM 0x04 +#define USB_CTRL_USB_PM_USB_PWRDN_MASK 0x80000000 +#define USB_CTRL_USB_PM_SOFT_RESET_MASK 0x40000000 +#define USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK 0x00800000 +#define USB_CTRL_USB_PM_XHC_SOFT_RESETB_MASK 0x00400000 +#define USB_CTRL_USB_PM_STATUS 0x08 +#define USB_CTRL_USB_DEVICE_CTL1 0x10 +#define USB_CTRL_USB_DEVICE_CTL1_PORT_MODE_MASK 0x00000003 + + +static void xhci_soft_reset(struct brcm_usb_init_params *params, + int on_off) +{ + void __iomem *ctrl = params->ctrl_regs; + + /* Assert reset */ + if (on_off) + USB_CTRL_UNSET(ctrl, USB_PM, XHC_SOFT_RESETB); + /* De-assert reset */ + else + USB_CTRL_SET(ctrl, USB_PM, XHC_SOFT_RESETB); +} + +static void usb_init_ipp(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->ctrl_regs; + u32 reg; + u32 orig_reg; + + pr_debug("%s\n", __func__); + + orig_reg = reg = brcm_usb_readl(USB_CTRL_REG(ctrl, SETUP)); + if (params->ipp != 2) + /* override ipp strap pin (if it exits) */ + reg &= ~(USB_CTRL_MASK(SETUP, STRAP_IPP_SEL)); + + /* Override the default OC and PP polarity */ + reg &= ~(USB_CTRL_MASK(SETUP, IPP) | USB_CTRL_MASK(SETUP, IOC)); + if (params->ioc) + reg |= USB_CTRL_MASK(SETUP, IOC); + if (params->ipp == 1) + reg |= USB_CTRL_MASK(SETUP, IPP); + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, SETUP)); + + /* + * If we're changing IPP, make sure power is off long enough + * to turn off any connected devices. + */ + if ((reg ^ orig_reg) & USB_CTRL_MASK(SETUP, IPP)) + msleep(50); +} + +static void usb_init_common(struct brcm_usb_init_params *params) +{ + u32 reg; + void __iomem *ctrl = params->ctrl_regs; + + pr_debug("%s\n", __func__); + + USB_CTRL_UNSET(ctrl, USB_PM, USB_PWRDN); + /* 1 millisecond - for USB clocks to settle down */ + usleep_range(1000, 2000); + + if (USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE)) { + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + reg &= ~USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE); + reg |= params->mode; + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + } + switch (params->mode) { + case USB_CTLR_MODE_HOST: + USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB); + break; + default: + USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB); + USB_CTRL_SET(ctrl, USB_PM, BDC_SOFT_RESETB); + break; + } +} + +static void usb_init_xhci(struct brcm_usb_init_params *params) +{ + pr_debug("%s\n", __func__); + + xhci_soft_reset(params, 0); +} + +static void usb_uninit_common(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->ctrl_regs; + + pr_debug("%s\n", __func__); + + USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN); + +} + +static void usb_uninit_xhci(struct brcm_usb_init_params *params) +{ + + pr_debug("%s\n", __func__); + + xhci_soft_reset(params, 1); +} + +static int usb_get_dual_select(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->ctrl_regs; + u32 reg = 0; + + pr_debug("%s\n", __func__); + + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + reg &= USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE); + return reg; +} + +static void usb_set_dual_select(struct brcm_usb_init_params *params, int mode) +{ + void __iomem *ctrl = params->ctrl_regs; + u32 reg; + + pr_debug("%s\n", __func__); + + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + reg &= ~USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE); + reg |= mode; + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); +} + + +static const struct brcm_usb_init_ops bcm7216_ops = { + .init_ipp = usb_init_ipp, + .init_common = usb_init_common, + .init_xhci = usb_init_xhci, + .uninit_common = usb_uninit_common, + .uninit_xhci = usb_uninit_xhci, + .get_dual_select = usb_get_dual_select, + .set_dual_select = usb_set_dual_select, +}; + +void brcm_usb_dvr_init_7216(struct brcm_usb_init_params *params) +{ + + pr_debug("%s\n", __func__); + + params->family_name = "7216"; + params->ops = &bcm7216_ops; +} |