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/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/mmio.h>
#include <console/console.h>
#include <delay.h>
#include <soc/usb.h>
#include <soc/clock.h>
/* USB BASE ADDRESS */
#define USB_HOST0_DWC3_BASE 0x758C100
#define USB3_USB30_QSCRATCH_BASE 0x7678800
#define USB2_FEMTO_PHY_PRI_BASE 0x007A000
#define USB_HOST1_DWC3_BASE 0x78CC100
#define USB2_USB30_QSCRATCH_BASE 0x79B8800
#define USB2_FEMTO_PHY_SEC_BASE 0x007C000
struct usb_qscratch {
u8 rsvd0[8];
u32 *qscratch_cfg_reg;
};
check_member(usb_qscratch, qscratch_cfg_reg, 0x08);
struct usb_usb2_phy_dig {
u8 rsvd1[116];
u32 utmi_ctrl5;
u32 ctrl_common0;
u32 ctrl_common1;
u8 rsvd2[12];
u32 phy_ctrl1;
u32 phy_ctrl2;
u8 rsvd3;
u32 override_x0;
u32 override_x1;
u32 override_x2;
u32 override_x3;
u8 rsvd4[24];
u32 tcsr_ctrl;
u8 rsvd5[36];
u32 refclk_ctrl;
};
check_member(usb_usb2_phy_dig, utmi_ctrl5, 0x74);
check_member(usb_usb2_phy_dig, phy_ctrl1, 0x8C);
check_member(usb_usb2_phy_dig, override_x0, 0x98);
check_member(usb_usb2_phy_dig, tcsr_ctrl, 0xC0);
check_member(usb_usb2_phy_dig, refclk_ctrl, 0xE8);
struct usb_dwc3 {
u32 sbuscfg0;
u32 sbuscfg1;
u32 txthrcfg;
u32 rxthrcfg;
u32 ctl;
u32 pmsts;
u32 sts;
u32 uctl1;
u32 snpsid;
u32 gpio;
u32 uid;
u32 uctl;
u64 buserraddr;
u64 prtbimap;
u8 reserved1[32];
u32 dbgfifospace;
u32 dbgltssm;
u32 dbglnmcc;
u32 dbgbmu;
u32 dbglspmux;
u32 dbglsp;
u32 dbgepinfo0;
u32 dbgepinfo1;
u64 prtbimap_hs;
u64 prtbimap_fs;
u8 reserved2[112];
u32 usb2phycfg;
u8 reserved3[60];
u32 usb2i2cctl;
u8 reserved4[60];
u32 usb2phyacc;
u8 reserved5[60];
u32 usb3pipectl;
u8 reserved6[60];
};
check_member(usb_dwc3, usb3pipectl, 0x1c0);
struct usb_dwc3_cfg {
struct usb_dwc3 *usb_host_dwc3;
struct usb_usb2_phy_dig *usb2_phy_dig;
struct usb_qscratch *usb_qscratch_reg;
u32 *usb2_phy_bcr;
u32 *usb2_phy_por_bcr;
u32 *usb3_bcr;
struct usb_board_data *board_data;
};
static struct usb_dwc3_cfg usb_host_base[2] = {
[HSUSB_SS_PORT_0] = {
.usb_host_dwc3 = (void *)USB_HOST0_DWC3_BASE,
.usb2_phy_dig = (void *)USB2_FEMTO_PHY_PRI_BASE,
.usb2_phy_bcr = (void *)GCC_USB_HS_PHY_CFG_AHB_BCR,
.usb2_phy_por_bcr = (void *)GCC_USB2A_PHY_BCR,
.usb3_bcr = (void *)GCC_USB_30_BCR,
.usb_qscratch_reg = (void *)USB3_USB30_QSCRATCH_BASE,
},
[HSUSB_HS_PORT_1] = {
.usb_host_dwc3 = (void *)USB_HOST1_DWC3_BASE,
.usb2_phy_dig = (void *)USB2_FEMTO_PHY_SEC_BASE,
.usb2_phy_bcr = (void *)GCC_QUSB2_PHY_BCR,
.usb2_phy_por_bcr = (void *)GCC_USB2_HS_PHY_ONLY_BCR,
.usb3_bcr = (void *)GCC_USB_HS_BCR,
.usb_qscratch_reg = (void *)USB2_USB30_QSCRATCH_BASE,
},
};
void reset_usb(enum usb_port port)
{
struct usb_dwc3_cfg *dwc3 = &usb_host_base[port];
/* Put Core in Reset */
printk(BIOS_INFO, "Starting DWC3 reset for USB%d\n", port);
/* Assert Core reset */
clock_reset_bcr(dwc3->usb3_bcr, 1);
}
static void usb2_phy_override_phy_params(struct usb_dwc3_cfg *dwc3)
{
/* Override disconnect & squelch threshold values */
write8(&dwc3->usb2_phy_dig->override_x0,
dwc3->board_data->parameter_override_x0);
/* Override HS transmitter Pre-emphasis values */
write8(&dwc3->usb2_phy_dig->override_x1,
dwc3->board_data->parameter_override_x1);
/* Override HS transmitter Rise/Fall time values */
write8(&dwc3->usb2_phy_dig->override_x2,
dwc3->board_data->parameter_override_x2);
/* Override FS/LS Source impedance values */
write8(&dwc3->usb2_phy_dig->override_x3,
dwc3->board_data->parameter_override_x3);
}
static void hs_usb_phy_init(struct usb_dwc3_cfg *dwc3)
{
write8(&dwc3->usb2_phy_dig->tcsr_ctrl, USB2PHY_TCSR_CTRL);
write8(&dwc3->usb2_phy_dig->refclk_ctrl, USB2PHY_REFCLK_CTRL);
write8(&dwc3->usb2_phy_dig->utmi_ctrl5, USB2PHY_UTMI_CTRL5);
write8(&dwc3->usb2_phy_dig->override_x0, USB2PHY_PARAMETER_OVERRIDE_X0);
write8(&dwc3->usb2_phy_dig->override_x1, USB2PHY_PARAMETER_OVERRIDE_X1);
write8(&dwc3->usb2_phy_dig->override_x2, USB2PHY_PARAMETER_OVERRIDE_X2);
write8(&dwc3->usb2_phy_dig->override_x3, USB2PHY_PARAMETER_OVERRIDE_X3);
if (dwc3->board_data)
/* Override board specific PHY tuning values */
usb2_phy_override_phy_params(dwc3);
write8(&dwc3->usb2_phy_dig->phy_ctrl1, USB2PHY_HS_PHY_CTRL1);
write8(&dwc3->usb2_phy_dig->ctrl_common0, QUSB2PHY_HS_PHY_CTRL_COMMON0);
write8(&dwc3->usb2_phy_dig->ctrl_common1, QUSB2PHY_HS_PHY_CTRL_COMMON1);
write8(&dwc3->usb2_phy_dig->phy_ctrl2, USB2PHY_HS_PHY_CTRL2);
udelay(20);
write8(&dwc3->usb2_phy_dig->utmi_ctrl5, USB2PHY_UTMI_CTRL5_POR_CLEAR);
write8(&dwc3->usb2_phy_dig->phy_ctrl2,
USB2PHY_HS_PHY_CTRL2_SUSPEND_N_SEL);
}
static void setup_dwc3(struct usb_dwc3 *dwc3)
{
/* core exits U1/U2/U3 only in PHY power state P1/P2/P3 respectively */
clrsetbits32(&dwc3->usb3pipectl,
DWC3_GUSB3PIPECTL_DELAYP1TRANS,
DWC3_GUSB3PIPECTL_UX_EXIT_IN_PX);
clrsetbits32(&dwc3->ctl, (DWC3_GCTL_SCALEDOWN_MASK |
DWC3_GCTL_DISSCRAMBLE),
DWC3_GCTL_U2EXIT_LFPS | DWC3_GCTL_DSBLCLKGTNG);
/* configure controller in Host mode */
clrsetbits32(&dwc3->ctl, (DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)),
DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_HOST));
printk(BIOS_INFO, "Configure USB in Host mode\n");
}
/* Initialization of DWC3 Core and PHY */
void setup_usb_host(enum usb_port port, struct usb_board_data *board_data)
{
struct usb_dwc3_cfg *dwc3 = &usb_host_base[port];
u32 val;
printk(BIOS_INFO, "Setting up USB HOST%d controller.\n", port);
dwc3->board_data = board_data;
/* Clear core reset. */
clock_reset_bcr(dwc3->usb3_bcr, 0);
if (port == HSUSB_SS_PORT_0) {
/* Set PHY reset. */
setbits32(&dwc3->usb2_phy_bcr, BIT(1));
udelay(15);
/* Clear PHY reset. */
clrbits32(&dwc3->usb2_phy_bcr, BIT(1));
} else {
clock_reset_bcr(dwc3->usb2_phy_bcr, 1);
udelay(15);
clock_reset_bcr(dwc3->usb2_phy_bcr, 0);
}
udelay(100);
/* Initialize PHYs */
hs_usb_phy_init(dwc3);
if (port == HSUSB_SS_PORT_0) {
/* Set PHY POR reset. */
setbits32(&dwc3->usb2_phy_por_bcr, BIT(0));
val = read8(&dwc3->usb2_phy_dig->ctrl_common0);
val &= ~(0x4);
write8(&dwc3->usb2_phy_dig->ctrl_common0, val);
udelay(20);
/* Clear PHY POR reset. */
clrbits32(&dwc3->usb2_phy_por_bcr, BIT(0));
} else {
clock_reset_bcr(dwc3->usb2_phy_por_bcr, 1);
val = read8(&dwc3->usb2_phy_dig->ctrl_common0);
val &= ~(0x4);
write8(&dwc3->usb2_phy_dig->ctrl_common0, val);
udelay(20);
clock_reset_bcr(dwc3->usb2_phy_por_bcr, 0);
}
udelay(100);
setup_dwc3(dwc3->usb_host_dwc3);
/*
* Below sequence is used when dwc3 operates without
* SSPHY and only HS/FS/LS modes are supported.
*/
/* Configure dwc3 to use UTMI clock as PIPE clock not present */
setbits32(&dwc3->usb_qscratch_reg->qscratch_cfg_reg,
PIPE_UTMI_CLK_DIS);
udelay(2);
setbits32(&dwc3->usb_qscratch_reg->qscratch_cfg_reg,
PIPE_UTMI_CLK_SEL | PIPE3_PHYSTATUS_SW);
udelay(3);
clrbits32(&dwc3->usb_qscratch_reg->qscratch_cfg_reg,
PIPE_UTMI_CLK_DIS);
printk(BIOS_INFO, "DWC3 and PHY setup finished\n");
}
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