| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <delay.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ehci.h> |
| #include <device/mmio.h> |
| #include <device/pci_ops.h> |
| #include "iobp.h" |
| #include "pch.h" |
| |
| #ifdef __SIMPLE_DEVICE__ |
| |
| void usb_ehci_disable(pci_devfn_t dev) |
| { |
| /* Set 0xDC[0]=1 */ |
| pci_or_config32(dev, 0xdc, (1 << 0)); |
| |
| /* Set D3Hot state and disable PME */ |
| pci_update_config16(dev, EHCI_PWR_CTL_STS, ~(PWR_CTL_ENABLE_PME | PWR_CTL_SET_MASK), |
| PWR_CTL_SET_D3); |
| |
| /* Clear memory and bus master */ |
| pci_write_config32(dev, PCI_BASE_ADDRESS_0, 0); |
| |
| pci_and_config16(dev, PCI_COMMAND, |
| ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO)); |
| |
| /* Disable device */ |
| switch (dev) { |
| case PCH_EHCI1_DEV: |
| RCBA32_OR(FD, PCH_DISABLE_EHCI1); |
| break; |
| case PCH_EHCI2_DEV: |
| RCBA32_OR(FD, PCH_DISABLE_EHCI2); |
| break; |
| } |
| } |
| |
| /* Handler for EHCI controller on entry to S3/S4/S5 */ |
| void usb_ehci_sleep_prepare(pci_devfn_t dev, u8 slp_typ) |
| { |
| u32 reg32; |
| u8 *bar0_base; |
| u16 pwr_state; |
| u16 pci_cmd; |
| |
| /* Check if the controller is disabled or not present */ |
| bar0_base = (u8 *)pci_read_config32(dev, PCI_BASE_ADDRESS_0); |
| if (bar0_base == 0 || bar0_base == (u8 *)0xffffffff) |
| return; |
| pci_cmd = pci_read_config16(dev, PCI_COMMAND); |
| |
| switch (slp_typ) { |
| case ACPI_S4: |
| case ACPI_S5: |
| /* Check if controller is in D3 power state */ |
| pwr_state = pci_read_config16(dev, EHCI_PWR_CTL_STS); |
| if ((pwr_state & PWR_CTL_SET_MASK) == PWR_CTL_SET_D3) { |
| /* Put in D0 */ |
| u32 new_state = pwr_state & ~PWR_CTL_SET_MASK; |
| new_state |= PWR_CTL_SET_D0; |
| pci_write_config16(dev, EHCI_PWR_CTL_STS, new_state); |
| |
| /* Make sure memory bar is set */ |
| pci_write_config32(dev, PCI_BASE_ADDRESS_0, (u32)bar0_base); |
| |
| /* Make sure memory space is enabled */ |
| pci_write_config16(dev, PCI_COMMAND, pci_cmd | |
| PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); |
| } |
| |
| /* |
| * If Run/Stop (bit0) is clear in USB2.0_CMD: |
| * - Clear Async Schedule Enable (bit5) and |
| * - Clear Periodic Schedule Enable (bit4) and |
| * - Set Run/Stop (bit0) |
| */ |
| reg32 = read32(bar0_base + EHCI_USB_CMD); |
| if (reg32 & EHCI_USB_CMD_RUN) { |
| reg32 &= ~(EHCI_USB_CMD_PSE | EHCI_USB_CMD_ASE); |
| reg32 |= EHCI_USB_CMD_RUN; |
| write32(bar0_base + EHCI_USB_CMD, reg32); |
| } |
| |
| /* Check for Port Enabled in PORTSC(0) (RMH) */ |
| reg32 = read32(bar0_base + EHCI_PORTSC(0)); |
| if (reg32 & EHCI_PORTSC_ENABLED) { |
| /* Set suspend bit in PORTSC if not already set */ |
| if (!(reg32 & EHCI_PORTSC_SUSPEND)) { |
| reg32 |= EHCI_PORTSC_SUSPEND; |
| write32(bar0_base + EHCI_PORTSC(0), reg32); |
| } |
| |
| /* Delay 25ms !! */ |
| udelay(25 * 1000); |
| |
| /* Clear Run/Stop bit */ |
| reg32 = read32(bar0_base + EHCI_USB_CMD); |
| reg32 &= EHCI_USB_CMD_RUN; |
| write32(bar0_base + EHCI_USB_CMD, reg32); |
| } |
| |
| /* Restore state to D3 if that is what it was at the start */ |
| if ((pwr_state & PWR_CTL_SET_MASK) == PWR_CTL_SET_D3) { |
| /* Restore pci command reg */ |
| pci_write_config16(dev, PCI_COMMAND, pci_cmd); |
| |
| /* Enable D3 */ |
| pci_write_config16(dev, EHCI_PWR_CTL_STS, pwr_state); |
| } |
| } |
| } |
| |
| #else /* !__SIMPLE_DEVICE__ */ |
| |
| static void usb_ehci_clock_gating(struct device *dev) |
| { |
| /* IOBP 0xE5004001[7:6] = 11b */ |
| pch_iobp_update(0xe5004001, ~0, (1 << 7) | (1 << 6)); |
| |
| /* Dx:F0:DCh[5,2,1] = 111b |
| * Dx:F0:DCh[0] = 1b when EHCI controller is disabled */ |
| pci_or_config32(dev, 0xdc, (1 << 5) | (1 << 2) | (1 << 1)); |
| |
| /* Dx:F0:78h[1:0] = 11b */ |
| pci_or_config32(dev, 0x78, (1 << 1) | (1 << 0)); |
| } |
| |
| static void usb_ehci_init(struct device *dev) |
| { |
| printk(BIOS_DEBUG, "EHCI: Setting up controller.. "); |
| |
| usb_ehci_clock_gating(dev); |
| |
| /* Disable Wake on Disconnect in RMH */ |
| RCBA32_OR(0x35b0, 0x00000022); |
| |
| printk(BIOS_DEBUG, "done.\n"); |
| } |
| |
| static void usb_ehci_set_subsystem(struct device *dev, unsigned int vendor, |
| unsigned int device) |
| { |
| u8 access_cntl; |
| |
| access_cntl = pci_read_config8(dev, 0x80); |
| |
| /* Enable writes to protected registers. */ |
| pci_write_config8(dev, 0x80, access_cntl | 1); |
| |
| pci_dev_set_subsystem(dev, vendor, device); |
| |
| /* Restore protection. */ |
| pci_write_config8(dev, 0x80, access_cntl); |
| } |
| |
| static struct pci_operations lops_pci = { |
| .set_subsystem = &usb_ehci_set_subsystem, |
| }; |
| |
| static struct device_operations usb_ehci_ops = { |
| .read_resources = pci_ehci_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = usb_ehci_init, |
| .ops_pci = &lops_pci, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { 0x9c26, 0x8c26, 0x8c2d, 0 }; |
| |
| static const struct pci_driver pch_usb_ehci __pci_driver = { |
| .ops = &usb_ehci_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |
| |
| #endif /* !__SIMPLE_DEVICE__ */ |