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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <acpi/acpi.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <stdint.h>
#include <reg_script.h>
#include <soc/iomap.h>
#include <soc/iosf.h>
#include <soc/pci_devs.h>
#include <soc/pmc.h>
#include <soc/ramstage.h>
#include <soc/ehci.h>
#include "chip.h"
static const struct reg_script ehci_init_script[] = {
/* Enable S0 PLL shutdown
* D29:F0:7A[12,10,7,6,4,3,2,1]=11111111b */
REG_PCI_OR16(0x7a, 0x14de),
/* Enable SB local clock gating
* D29:F0:7C[14,3,2]=111b (14 set in clock gating step) */
REG_PCI_OR32(0x7c, 0x0000000c),
REG_PCI_OR32(0x8c, 0x00000001),
/* Enable dynamic clock gating 0x4001=0xCE */
REG_IOSF_RMW(IOSF_PORT_USBPHY, 0x4001, 0xFFFFFF00, 0xCE),
/* Magic RCBA register set sequence */
/* RCBA + 0x200=0x1 */
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x200, 0x00000001),
/* RCBA + 0x204=0x2 */
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x204, 0x00000002),
/* RCBA + 0x208=0x0 */
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x208, 0x00000000),
/* RCBA + 0x240[4,3,2,1,0]=00000b */
REG_MMIO_RMW32(RCBA_BASE_ADDRESS + 0x240, ~0x0000001f, 0),
/* RCBA + 0x318[9,8,6,5,4,3,2,1,0]=000000111b */
REG_MMIO_RMW32(RCBA_BASE_ADDRESS + 0x318, ~0x00000378, 0x00000007),
/* RCBA + 0x31c[3,2,1,0]=0011b */
REG_MMIO_RMW32(RCBA_BASE_ADDRESS + 0x31c, ~0x0000000c, 0x00000003),
REG_SCRIPT_END
};
static const struct reg_script ehci_clock_gating_script[] = {
/* Enable SB local clock gating */
REG_PCI_OR32(0x7c, 0x00004000),
/* RCBA + 0x284=0xbe (step B0+) */
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x284, 0x000000be),
REG_SCRIPT_END
};
static const struct reg_script ehci_disable_script[] = {
/* Clear Run/Stop Bit */
REG_RES_RMW32(PCI_BASE_ADDRESS_0, USB2CMD, ~USB2CMD_RS, 0),
/* Wait for HC Halted */
REG_RES_POLL32(PCI_BASE_ADDRESS_0, USB2STS,
USB2STS_HCHALT, USB2STS_HCHALT, 10000),
/* Disable Interrupts */
REG_PCI_OR32(EHCI_CMD_STS, INTRDIS),
/* Disable Asynchronous and Periodic Scheduler */
REG_RES_RMW32(PCI_BASE_ADDRESS_0, USB2CMD,
~(USB2CMD_ASE | USB2CMD_PSE), 0),
/* Disable port wake */
REG_PCI_RMW32(EHCI_SBRN_FLA_PWC, ~(PORTWKIMP | PORTWKCAPMASK), 0),
/* Set Function Disable bit in RCBA */
REG_MMIO_OR32(RCBA_BASE_ADDRESS + RCBA_FUNC_DIS, RCBA_EHCI_DIS),
REG_SCRIPT_END
};
static const struct reg_script ehci_hc_reset[] = {
REG_RES_OR16(PCI_BASE_ADDRESS_0, USB2CMD, USB2CMD_HCRESET),
REG_SCRIPT_END
};
static void usb2_phy_init(struct device *dev)
{
struct soc_intel_baytrail_config *config = config_of(dev);
u32 usb2_comp_bg = (config->usb2_comp_bg == 0 ?
0x4700 : config->usb2_comp_bg);
struct reg_script usb2_phy_script[] = {
/* USB3PHYInit() */
REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_COMPBG,
usb2_comp_bg),
/* Per port phy settings, set in devicetree.cb */
REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE0,
config->usb2_per_port_lane0),
REG_IOSF_WRITE(IOSF_PORT_USBPHY,
USBPHY_PER_PORT_RCOMP_HS_PULLUP0,
config->usb2_per_port_rcomp_hs_pullup0),
REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE1,
config->usb2_per_port_lane1),
REG_IOSF_WRITE(IOSF_PORT_USBPHY,
USBPHY_PER_PORT_RCOMP_HS_PULLUP1,
config->usb2_per_port_rcomp_hs_pullup1),
REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE2,
config->usb2_per_port_lane2),
REG_IOSF_WRITE(IOSF_PORT_USBPHY,
USBPHY_PER_PORT_RCOMP_HS_PULLUP2,
config->usb2_per_port_rcomp_hs_pullup2),
REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE3,
config->usb2_per_port_lane3),
REG_IOSF_WRITE(IOSF_PORT_USBPHY,
USBPHY_PER_PORT_RCOMP_HS_PULLUP3,
config->usb2_per_port_rcomp_hs_pullup3),
REG_SCRIPT_END
};
reg_script_run(usb2_phy_script);
}
static void ehci_init(struct device *dev)
{
struct soc_intel_baytrail_config *config = config_of(dev);
struct reg_script ehci_hc_init[] = {
/* Controller init */
REG_SCRIPT_NEXT(ehci_init_script),
/* Enable clock gating */
REG_SCRIPT_NEXT(ehci_clock_gating_script),
/*
* Disable ports if requested
*/
/* Open per-port disable control override */
REG_IO_RMW16(ACPI_BASE_ADDRESS + UPRWC, ~0, UPRWC_WR_EN),
REG_PCI_WRITE8(EHCI_USB2PDO, config->usb2_port_disable_mask),
/* Close per-port disable control override */
REG_IO_RMW16(ACPI_BASE_ADDRESS + UPRWC, ~UPRWC_WR_EN, 0),
REG_SCRIPT_END
};
/* Don't reset controller in S3 resume path */
if (!acpi_is_wakeup_s3())
reg_script_run_on_dev(dev, ehci_hc_reset);
/* Disable controller if ports are routed to XHCI */
if (config->usb_route_to_xhci) {
/* Disable controller */
reg_script_run_on_dev(dev, ehci_disable_script);
/* Hide device with southcluster function */
dev->enabled = 0;
southcluster_enable_dev(dev);
} else {
/* Initialize EHCI controller */
reg_script_run_on_dev(dev, ehci_hc_init);
}
/* Setup USB2 PHY based on board config */
usb2_phy_init(dev);
}
static struct device_operations ehci_device_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = ehci_init,
.ops_pci = &soc_pci_ops,
};
static const struct pci_driver baytrail_ehci __pci_driver = {
.ops = &ehci_device_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = EHCI_DEVID
};
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