410 lines
12 KiB
C
410 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2018, Broadcom */
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/*
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* This module contains USB PHY initialization for power up and S3 resume
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* for newer Synopsys based USB hardware first used on the bcm7216.
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*/
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/soc/brcmstb/brcmstb.h>
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#include "phy-brcm-usb-init.h"
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#define PHY_LOCK_TIMEOUT_MS 200
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/* Register definitions for syscon piarbctl registers */
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#define PIARBCTL_CAM 0x00
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#define PIARBCTL_SPLITTER 0x04
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#define PIARBCTL_MISC 0x08
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#define PIARBCTL_MISC_SECURE_MASK 0x80000000
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#define PIARBCTL_MISC_USB_SELECT_MASK 0x40000000
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#define PIARBCTL_MISC_USB_4G_SDRAM_MASK 0x20000000
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#define PIARBCTL_MISC_USB_PRIORITY_MASK 0x000f0000
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#define PIARBCTL_MISC_USB_MEM_PAGE_MASK 0x0000f000
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#define PIARBCTL_MISC_CAM1_MEM_PAGE_MASK 0x00000f00
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#define PIARBCTL_MISC_CAM0_MEM_PAGE_MASK 0x000000f0
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#define PIARBCTL_MISC_SATA_PRIORITY_MASK 0x0000000f
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#define PIARBCTL_MISC_USB_ONLY_MASK \
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(PIARBCTL_MISC_USB_SELECT_MASK | \
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PIARBCTL_MISC_USB_4G_SDRAM_MASK | \
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PIARBCTL_MISC_USB_PRIORITY_MASK | \
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PIARBCTL_MISC_USB_MEM_PAGE_MASK)
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/* Register definitions for the USB CTRL block */
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#define USB_CTRL_SETUP 0x00
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#define USB_CTRL_SETUP_STRAP_IPP_SEL_MASK 0x02000000
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#define USB_CTRL_SETUP_SCB2_EN_MASK 0x00008000
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#define USB_CTRL_SETUP_tca_drv_sel_MASK 0x01000000
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#define USB_CTRL_SETUP_SCB1_EN_MASK 0x00004000
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#define USB_CTRL_SETUP_SOFT_SHUTDOWN_MASK 0x00000200
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#define USB_CTRL_SETUP_IPP_MASK 0x00000020
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#define USB_CTRL_SETUP_IOC_MASK 0x00000010
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#define USB_CTRL_USB_PM 0x04
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#define USB_CTRL_USB_PM_USB_PWRDN_MASK 0x80000000
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#define USB_CTRL_USB_PM_SOFT_RESET_MASK 0x40000000
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#define USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK 0x00800000
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#define USB_CTRL_USB_PM_XHC_SOFT_RESETB_MASK 0x00400000
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#define USB_CTRL_USB_PM_STATUS 0x08
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#define USB_CTRL_USB_DEVICE_CTL1 0x10
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#define USB_CTRL_USB_DEVICE_CTL1_PORT_MODE_MASK 0x00000003
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#define USB_CTRL_TEST_PORT_CTL 0x30
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#define USB_CTRL_TEST_PORT_CTL_TPOUT_SEL_MASK 0x000000ff
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#define USB_CTRL_TEST_PORT_CTL_TPOUT_SEL_PME_GEN_MASK 0x0000002e
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#define USB_CTRL_TP_DIAG1 0x34
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#define USB_CTLR_TP_DIAG1_wake_MASK 0x00000002
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#define USB_CTRL_CTLR_CSHCR 0x50
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#define USB_CTRL_CTLR_CSHCR_ctl_pme_en_MASK 0x00040000
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/* Register definitions for the USB_PHY block in 7211b0 */
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#define USB_PHY_PLL_CTL 0x00
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#define USB_PHY_PLL_CTL_PLL_RESETB_MASK 0x40000000
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#define USB_PHY_PLL_LDO_CTL 0x08
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#define USB_PHY_PLL_LDO_CTL_AFE_CORERDY_MASK 0x00000004
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#define USB_PHY_PLL_LDO_CTL_AFE_LDO_PWRDWNB_MASK 0x00000002
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#define USB_PHY_PLL_LDO_CTL_AFE_BG_PWRDWNB_MASK 0x00000001
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#define USB_PHY_UTMI_CTL_1 0x04
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#define USB_PHY_UTMI_CTL_1_POWER_UP_FSM_EN_MASK 0x00000800
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#define USB_PHY_UTMI_CTL_1_PHY_MODE_MASK 0x0000000c
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#define USB_PHY_UTMI_CTL_1_PHY_MODE_SHIFT 2
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#define USB_PHY_IDDQ 0x1c
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#define USB_PHY_IDDQ_phy_iddq_MASK 0x00000001
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#define USB_PHY_STATUS 0x20
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#define USB_PHY_STATUS_pll_lock_MASK 0x00000001
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/* Register definitions for the MDIO registers in the DWC2 block of
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* the 7211b0.
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* NOTE: The PHY's MDIO registers are only accessible through the
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* legacy DesignWare USB controller even though it's not being used.
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*/
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#define USB_GMDIOCSR 0
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#define USB_GMDIOGEN 4
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/* Register definitions for the BDC EC block in 7211b0 */
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#define BDC_EC_AXIRDA 0x0c
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#define BDC_EC_AXIRDA_RTS_MASK 0xf0000000
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#define BDC_EC_AXIRDA_RTS_SHIFT 28
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static void usb_mdio_write_7211b0(struct brcm_usb_init_params *params,
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uint8_t addr, uint16_t data)
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{
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void __iomem *usb_mdio = params->regs[BRCM_REGS_USB_MDIO];
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addr &= 0x1f; /* 5-bit address */
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brcm_usb_writel(0xffffffff, usb_mdio + USB_GMDIOGEN);
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while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31))
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;
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brcm_usb_writel(0x59020000 | (addr << 18) | data,
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usb_mdio + USB_GMDIOGEN);
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while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31))
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;
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brcm_usb_writel(0x00000000, usb_mdio + USB_GMDIOGEN);
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while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31))
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;
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}
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static uint16_t __maybe_unused usb_mdio_read_7211b0(
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struct brcm_usb_init_params *params, uint8_t addr)
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{
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void __iomem *usb_mdio = params->regs[BRCM_REGS_USB_MDIO];
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addr &= 0x1f; /* 5-bit address */
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brcm_usb_writel(0xffffffff, usb_mdio + USB_GMDIOGEN);
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while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31))
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;
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brcm_usb_writel(0x69020000 | (addr << 18), usb_mdio + USB_GMDIOGEN);
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while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31))
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;
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brcm_usb_writel(0x00000000, usb_mdio + USB_GMDIOGEN);
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while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31))
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;
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return brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & 0xffff;
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}
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static void usb2_eye_fix_7211b0(struct brcm_usb_init_params *params)
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{
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/* select bank */
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usb_mdio_write_7211b0(params, 0x1f, 0x80a0);
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/* Set the eye */
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usb_mdio_write_7211b0(params, 0x0a, 0xc6a0);
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}
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static void xhci_soft_reset(struct brcm_usb_init_params *params,
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int on_off)
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{
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void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
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/* Assert reset */
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if (on_off)
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USB_CTRL_UNSET(ctrl, USB_PM, XHC_SOFT_RESETB);
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/* De-assert reset */
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else
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USB_CTRL_SET(ctrl, USB_PM, XHC_SOFT_RESETB);
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}
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static void usb_init_ipp(struct brcm_usb_init_params *params)
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{
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void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
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u32 reg;
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u32 orig_reg;
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pr_debug("%s\n", __func__);
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orig_reg = reg = brcm_usb_readl(USB_CTRL_REG(ctrl, SETUP));
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if (params->ipp != 2)
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/* override ipp strap pin (if it exits) */
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reg &= ~(USB_CTRL_MASK(SETUP, STRAP_IPP_SEL));
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/* Override the default OC and PP polarity */
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reg &= ~(USB_CTRL_MASK(SETUP, IPP) | USB_CTRL_MASK(SETUP, IOC));
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if (params->ioc)
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reg |= USB_CTRL_MASK(SETUP, IOC);
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if (params->ipp == 1)
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reg |= USB_CTRL_MASK(SETUP, IPP);
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brcm_usb_writel(reg, USB_CTRL_REG(ctrl, SETUP));
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/*
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* If we're changing IPP, make sure power is off long enough
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* to turn off any connected devices.
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*/
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if ((reg ^ orig_reg) & USB_CTRL_MASK(SETUP, IPP))
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msleep(50);
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}
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static void syscon_piarbctl_init(struct regmap *rmap)
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{
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/* Switch from legacy USB OTG controller to new STB USB controller */
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regmap_update_bits(rmap, PIARBCTL_MISC, PIARBCTL_MISC_USB_ONLY_MASK,
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PIARBCTL_MISC_USB_SELECT_MASK |
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PIARBCTL_MISC_USB_4G_SDRAM_MASK);
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}
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static void usb_init_common(struct brcm_usb_init_params *params)
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{
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u32 reg;
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void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
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pr_debug("%s\n", __func__);
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USB_CTRL_UNSET(ctrl, USB_PM, USB_PWRDN);
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/* 1 millisecond - for USB clocks to settle down */
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usleep_range(1000, 2000);
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if (USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE)) {
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reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
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reg &= ~USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE);
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reg |= params->mode;
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brcm_usb_writel(reg, USB_CTRL_REG(ctrl, USB_DEVICE_CTL1));
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}
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switch (params->mode) {
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case USB_CTLR_MODE_HOST:
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USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB);
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break;
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default:
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USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB);
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USB_CTRL_SET(ctrl, USB_PM, BDC_SOFT_RESETB);
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break;
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}
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}
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static void usb_wake_enable_7211b0(struct brcm_usb_init_params *params,
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bool enable)
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{
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void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
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if (enable)
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USB_CTRL_SET(ctrl, CTLR_CSHCR, ctl_pme_en);
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else
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USB_CTRL_UNSET(ctrl, CTLR_CSHCR, ctl_pme_en);
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}
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static void usb_init_common_7211b0(struct brcm_usb_init_params *params)
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{
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void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
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void __iomem *usb_phy = params->regs[BRCM_REGS_USB_PHY];
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void __iomem *bdc_ec = params->regs[BRCM_REGS_BDC_EC];
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int timeout_ms = PHY_LOCK_TIMEOUT_MS;
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u32 reg;
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if (params->syscon_piarbctl)
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syscon_piarbctl_init(params->syscon_piarbctl);
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USB_CTRL_UNSET(ctrl, USB_PM, USB_PWRDN);
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usb_wake_enable_7211b0(params, false);
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if (!params->wake_enabled) {
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/* undo possible suspend settings */
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brcm_usb_writel(0, usb_phy + USB_PHY_IDDQ);
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reg = brcm_usb_readl(usb_phy + USB_PHY_PLL_CTL);
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reg |= USB_PHY_PLL_CTL_PLL_RESETB_MASK;
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brcm_usb_writel(reg, usb_phy + USB_PHY_PLL_CTL);
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/* temporarily enable FSM so PHY comes up properly */
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reg = brcm_usb_readl(usb_phy + USB_PHY_UTMI_CTL_1);
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reg |= USB_PHY_UTMI_CTL_1_POWER_UP_FSM_EN_MASK;
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brcm_usb_writel(reg, usb_phy + USB_PHY_UTMI_CTL_1);
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}
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/* Init the PHY */
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reg = USB_PHY_PLL_LDO_CTL_AFE_CORERDY_MASK |
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USB_PHY_PLL_LDO_CTL_AFE_LDO_PWRDWNB_MASK |
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USB_PHY_PLL_LDO_CTL_AFE_BG_PWRDWNB_MASK;
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brcm_usb_writel(reg, usb_phy + USB_PHY_PLL_LDO_CTL);
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/* wait for lock */
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while (timeout_ms-- > 0) {
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reg = brcm_usb_readl(usb_phy + USB_PHY_STATUS);
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if (reg & USB_PHY_STATUS_pll_lock_MASK)
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break;
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usleep_range(1000, 2000);
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}
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/* Set the PHY_MODE */
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reg = brcm_usb_readl(usb_phy + USB_PHY_UTMI_CTL_1);
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reg &= ~USB_PHY_UTMI_CTL_1_PHY_MODE_MASK;
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reg |= params->mode << USB_PHY_UTMI_CTL_1_PHY_MODE_SHIFT;
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brcm_usb_writel(reg, usb_phy + USB_PHY_UTMI_CTL_1);
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usb_init_common(params);
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/*
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* The BDC controller will get occasional failures with
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* the default "Read Transaction Size" of 6 (1024 bytes).
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* Set it to 4 (256 bytes).
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*/
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if ((params->mode != USB_CTLR_MODE_HOST) && bdc_ec) {
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reg = brcm_usb_readl(bdc_ec + BDC_EC_AXIRDA);
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reg &= ~BDC_EC_AXIRDA_RTS_MASK;
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reg |= (0x4 << BDC_EC_AXIRDA_RTS_SHIFT);
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brcm_usb_writel(reg, bdc_ec + BDC_EC_AXIRDA);
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}
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/*
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* Disable FSM, otherwise the PHY will auto suspend when no
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* device is connected and will be reset on resume.
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*/
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reg = brcm_usb_readl(usb_phy + USB_PHY_UTMI_CTL_1);
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reg &= ~USB_PHY_UTMI_CTL_1_POWER_UP_FSM_EN_MASK;
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brcm_usb_writel(reg, usb_phy + USB_PHY_UTMI_CTL_1);
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usb2_eye_fix_7211b0(params);
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}
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static void usb_init_xhci(struct brcm_usb_init_params *params)
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{
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pr_debug("%s\n", __func__);
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xhci_soft_reset(params, 0);
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}
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static void usb_uninit_common(struct brcm_usb_init_params *params)
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{
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void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
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pr_debug("%s\n", __func__);
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USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN);
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}
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static void usb_uninit_common_7211b0(struct brcm_usb_init_params *params)
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{
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void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
|
||
|
|
void __iomem *usb_phy = params->regs[BRCM_REGS_USB_PHY];
|
||
|
|
u32 reg;
|
||
|
|
|
||
|
|
pr_debug("%s\n", __func__);
|
||
|
|
|
||
|
|
if (params->wake_enabled) {
|
||
|
|
USB_CTRL_SET(ctrl, TEST_PORT_CTL, TPOUT_SEL_PME_GEN);
|
||
|
|
usb_wake_enable_7211b0(params, true);
|
||
|
|
} else {
|
||
|
|
USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN);
|
||
|
|
brcm_usb_writel(0, usb_phy + USB_PHY_PLL_LDO_CTL);
|
||
|
|
reg = brcm_usb_readl(usb_phy + USB_PHY_PLL_CTL);
|
||
|
|
reg &= ~USB_PHY_PLL_CTL_PLL_RESETB_MASK;
|
||
|
|
brcm_usb_writel(reg, usb_phy + USB_PHY_PLL_CTL);
|
||
|
|
brcm_usb_writel(USB_PHY_IDDQ_phy_iddq_MASK,
|
||
|
|
usb_phy + USB_PHY_IDDQ);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static void usb_uninit_xhci(struct brcm_usb_init_params *params)
|
||
|
|
{
|
||
|
|
|
||
|
|
pr_debug("%s\n", __func__);
|
||
|
|
|
||
|
|
if (!params->wake_enabled)
|
||
|
|
xhci_soft_reset(params, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int usb_get_dual_select(struct brcm_usb_init_params *params)
|
||
|
|
{
|
||
|
|
void __iomem *ctrl = params->regs[BRCM_REGS_CTRL];
|
||
|
|
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->regs[BRCM_REGS_CTRL];
|
||
|
|
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,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct brcm_usb_init_ops bcm7211b0_ops = {
|
||
|
|
.init_ipp = usb_init_ipp,
|
||
|
|
.init_common = usb_init_common_7211b0,
|
||
|
|
.init_xhci = usb_init_xhci,
|
||
|
|
.uninit_common = usb_uninit_common_7211b0,
|
||
|
|
.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;
|
||
|
|
}
|
||
|
|
|
||
|
|
void brcm_usb_dvr_init_7211b0(struct brcm_usb_init_params *params)
|
||
|
|
{
|
||
|
|
|
||
|
|
pr_debug("%s\n", __func__);
|
||
|
|
|
||
|
|
params->family_name = "7211";
|
||
|
|
params->ops = &bcm7211b0_ops;
|
||
|
|
params->suspend_with_clocks = true;
|
||
|
|
}
|