| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2013 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; version 2 of |
| * the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <console/console.h> |
| #include <delay.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <arch/io.h> |
| #include "pch.h" |
| |
| #ifdef __SMM__ |
| |
| static u32 usb_xhci_mem_base(device_t dev) |
| { |
| u32 mem_base = pci_read_config32(dev, PCI_BASE_ADDRESS_0); |
| |
| /* Check if the controller is disabled or not present */ |
| if (mem_base == 0 || mem_base == 0xffffffff) |
| return 0; |
| |
| return mem_base & ~0xf; |
| } |
| |
| #endif |
| |
| #if 0 |
| |
| static int usb_xhci_port_count_usb3(device_t dev) |
| { |
| if (pch_is_lp()) { |
| /* LynxPoint-LP has 4 SS ports */ |
| return 4; |
| } else { |
| /* LynxPoint-H can have 0, 2, 4, or 6 SS ports */ |
| u32 mem_base = usb_xhci_mem_base(dev); |
| u32 fus = read32(mem_base + XHCI_USB3FUS); |
| fus >>= XHCI_USB3FUS_SS_SHIFT; |
| fus &= XHCI_USB3FUS_SS_MASK; |
| switch (fus) { |
| case 3: return 0; |
| case 2: return 2; |
| case 1: return 4; |
| case 0: default: return 6; |
| } |
| } |
| return 0; |
| } |
| |
| static void usb_xhci_reset_status_usb3(u32 mem_base, int port) |
| { |
| u32 portsc = mem_base + XHCI_USB3_PORTSC(port); |
| write32(portsc, read32(portsc) | XHCI_USB3_PORTSC_CHST); |
| } |
| |
| static void usb_xhci_reset_port_usb3(u32 mem_base, int port) |
| { |
| u32 portsc = mem_base + XHCI_USB3_PORTSC(port); |
| write32(portsc, read32(portsc) | XHCI_USB3_PORTSC_WPR); |
| } |
| |
| #define XHCI_RESET_DELAY_US 1000 /* 1ms */ |
| #define XHCI_RESET_TIMEOUT 100 /* 100ms */ |
| |
| /* |
| * 1) Wait until port is done polling |
| * 2) If port is disconnected |
| * a) Issue warm port reset |
| * b) Poll for warm reset complete |
| * c) Write 1 to port change status bits |
| */ |
| static void usb_xhci_reset_usb3(device_t dev, int all) |
| { |
| u32 status, port_disabled; |
| int timeout, port; |
| int port_count = usb_xhci_port_count_usb3(dev); |
| u32 mem_base = usb_xhci_mem_base(dev); |
| |
| if (!mem_base || !port_count) |
| return; |
| |
| /* Get mask of disabled ports */ |
| port_disabled = pci_read_config32(dev, XHCI_USB3PDO); |
| |
| /* Wait until all enabled ports are done polling */ |
| for (timeout = XHCI_RESET_TIMEOUT; timeout; timeout--) { |
| int complete = 1; |
| for (port = 0; port < port_count; port++) { |
| /* Skip disabled ports */ |
| if (port_disabled & (1 << port)) |
| continue; |
| /* Read port link status field */ |
| status = read32(mem_base + XHCI_USB3_PORTSC(port)); |
| status &= XHCI_USB3_PORTSC_PLS; |
| if (status == XHCI_PLSR_POLLING) |
| complete = 0; |
| } |
| /* Exit if all ports not polling */ |
| if (complete) |
| break; |
| udelay(XHCI_RESET_DELAY_US); |
| } |
| |
| /* Reset all requested ports */ |
| for (port = 0; port < port_count; port++) { |
| u32 portsc = mem_base + XHCI_USB3_PORTSC(port); |
| /* Skip disabled ports */ |
| if (port_disabled & (1 << port)) |
| continue; |
| status = read32(portsc) & XHCI_USB3_PORTSC_PLS; |
| /* Reset all or only disconnected ports */ |
| if (all || status == XHCI_PLSR_RXDETECT) |
| usb_xhci_reset_port_usb3(mem_base, port); |
| else |
| port_disabled |= 1 << port; /* No reset */ |
| } |
| |
| /* Wait for warm reset complete on all reset ports */ |
| for (timeout = XHCI_RESET_TIMEOUT; timeout; timeout--) { |
| int complete = 1; |
| for (port = 0; port < port_count; port++) { |
| /* Only check ports that were reset */ |
| if (port_disabled & (1 << port)) |
| continue; |
| /* Check if warm reset is complete */ |
| status = read32(mem_base + XHCI_USB3_PORTSC(port)); |
| if (!(status & XHCI_USB3_PORTSC_WRC)) |
| complete = 0; |
| } |
| /* Check for warm reset complete in any port */ |
| if (complete) |
| break; |
| udelay(XHCI_RESET_DELAY_US); |
| } |
| |
| /* Clear port change status bits */ |
| for (port = 0; port < port_count; port++) |
| usb_xhci_reset_status_usb3(mem_base, port); |
| } |
| |
| #endif |
| |
| #ifdef __SMM__ |
| |
| /* Handler for XHCI controller on entry to S3/S4/S5 */ |
| void usb_xhci_sleep_prepare(device_t dev, u8 slp_typ) |
| { |
| u16 reg16; |
| u32 reg32; |
| u32 mem_base = usb_xhci_mem_base(dev); |
| |
| if (!mem_base || slp_typ < 3) |
| return; |
| |
| if (pch_is_lp()) { |
| /* Set D0 state */ |
| reg16 = pci_read_config16(dev, XHCI_PWR_CTL_STS); |
| reg16 &= ~PWR_CTL_SET_MASK; |
| reg16 |= PWR_CTL_SET_D0; |
| pci_write_config16(dev, XHCI_PWR_CTL_STS, reg16); |
| |
| /* Clear PCI 0xB0[14:13] */ |
| reg32 = pci_read_config32(dev, 0xb0); |
| reg32 &= ~((1 << 14) | (1 << 13)); |
| pci_write_config32(dev, 0xb0, reg32); |
| |
| /* Clear MMIO 0x816c[14,2] */ |
| reg32 = read32(mem_base + 0x816c); |
| reg32 &= ~((1 << 14) | (1 << 2)); |
| write32(mem_base + 0x816c, reg32); |
| |
| /* Set MMIO 0x80e0[15] */ |
| reg32 = read32(mem_base + 0x80e0); |
| reg32 |= (1 << 15); |
| write32(mem_base + 0x80e0, reg32); |
| } |
| |
| /* Set D3Hot state and enable PME */ |
| pci_or_config16(dev, XHCI_PWR_CTL_STS, PWR_CTL_SET_D3); |
| pci_or_config16(dev, XHCI_PWR_CTL_STS, PWR_CTL_ENABLE_PME); |
| } |
| |
| #else /* !__SMM__ */ |
| |
| static void usb_xhci_clock_gating(device_t dev) |
| { |
| u32 reg32; |
| |
| /* IOBP 0xE5004001[7:6] = 11b */ |
| pch_iobp_update(0xe5004001, ~0, (1 << 7)|(1 << 6)); |
| |
| reg32 = pci_read_config32(dev, 0x40); |
| reg32 &= ~(1 << 23); /* unsupported request */ |
| |
| if (pch_is_lp()) { |
| /* D20:F0:40h[18,17,8] = 111b */ |
| reg32 |= (1 << 18) | (1 << 17) | (1 << 8); |
| /* D20:F0:40h[21,20,19] = 110b to enable XHCI Idle L1 */ |
| reg32 &= ~(1 << 19); |
| reg32 |= (1 << 21) | (1 << 20); |
| } else { |
| /* D20:F0:40h[21,20,18,17,8] = 11111b */ |
| reg32 |= (1 << 21)|(1 << 20)|(1 << 18)|(1 << 17)|(1 << 8); |
| } |
| |
| /* Avoid writing upper byte as it is write-once */ |
| pci_write_config16(dev, 0x40, (u16)(reg32 & 0xffff)); |
| pci_write_config8(dev, 0x40 + 2, (u8)((reg32 >> 16) & 0xff)); |
| |
| /* D20:F0:44h[9,7,3] = 111b */ |
| reg32 = pci_read_config32(dev, 0x44); |
| reg32 |= (1 << 9) | (1 << 7) | (1 << 3); |
| pci_write_config32(dev, 0x44, reg32); |
| |
| reg32 = pci_read_config32(dev, 0xa0); |
| if (pch_is_lp()) { |
| /* D20:F0:A0h[18] = 1 */ |
| reg32 |= (1 << 18); |
| } else { |
| /* D20:F0:A0h[6] = 1 */ |
| reg32 |= (1 << 6); |
| } |
| pci_write_config32(dev, 0xa0, reg32); |
| |
| /* D20:F0:A4h[13] = 0 */ |
| reg32 = pci_read_config32(dev, 0xa4); |
| reg32 &= ~(1 << 13); |
| pci_write_config32(dev, 0xa4, reg32); |
| } |
| |
| static void usb_xhci_init(device_t dev) |
| { |
| struct resource *bar0 = find_resource(dev, PCI_BASE_ADDRESS_0); |
| u32 reg32; |
| |
| if (!bar0 || bar0->base == 0 || bar0->base == 0xffffffff) |
| return; |
| |
| /* Enable clock gating first */ |
| usb_xhci_clock_gating(dev); |
| |
| /* D20:F0:74h[1:0] = 11b (set D3Hot state) */ |
| reg32 = pci_read_config16(dev, 0x74); |
| reg32 |= (1 << 1) | (1 << 0); |
| pci_write_config16(dev, 0x74, reg32); |
| |
| reg32 = read32(bar0->base + 0x8144); |
| if (pch_is_lp()) { |
| /* XHCIBAR + 8144h[8,7,6] = 111b */ |
| reg32 |= (1 << 8) | (1 << 7) | (1 << 6); |
| } else { |
| /* XHCIBAR + 8144h[8,7,6] = 100b */ |
| reg32 &= ~((1 << 7) | (1 << 6)); |
| reg32 |= (1 << 8); |
| } |
| write32(bar0->base + 0x8144, reg32); |
| |
| if (pch_is_lp()) { |
| /* XHCIBAR + 816Ch[19:0] = 000f0038h */ |
| reg32 = read32(bar0->base + 0x816c); |
| reg32 &= ~0x000fffff; |
| reg32 |= 0x000f0038; |
| write32(bar0->base + 0x816c, reg32); |
| |
| /* D20:F0:B0h[17,14,13] = 100b */ |
| reg32 = pci_read_config32(dev, 0xb0); |
| reg32 &= ~((1 << 14) | (1 << 13)); |
| reg32 |= (1 << 17); |
| pci_write_config32(dev, 0xb0, reg32); |
| |
| /* XHCIBAR + 818Ch[7:0] = FFh */ |
| reg32 = read32(bar0->base + 0x818c); |
| reg32 |= 0xff; |
| write32(bar0->base + 0x818c, reg32); |
| } |
| |
| reg32 = pci_read_config32(dev, 0x50); |
| if (pch_is_lp()) { |
| /* D20:F0:50h[28:0] = 0FCE2E5Fh */ |
| reg32 &= ~0x1fffffff; |
| reg32 |= 0x0fce2e5f; |
| } else { |
| /* D20:F0:50h[26:0] = 07886E9Fh */ |
| reg32 &= ~0x07ffffff; |
| reg32 |= 0x07886e9f; |
| } |
| pci_write_config32(dev, 0x50, reg32); |
| |
| /* D20:F0:44h[31] = 1 (Access Control Bit) */ |
| reg32 = pci_read_config32(dev, 0x40); |
| reg32 |= (1 << 31); |
| pci_write_config32(dev, 0x40, reg32); |
| |
| /* D20:F0:40h[31,23] = 10b (OC Configuration Done) */ |
| reg32 = pci_read_config32(dev, 0x40); |
| reg32 &= ~(1 << 23); /* unsupported request */ |
| reg32 |= (1 << 31); |
| pci_write_config32(dev, 0x40, reg32); |
| } |
| |
| static void usb_xhci_set_subsystem(device_t dev, unsigned vendor, |
| unsigned device) |
| { |
| if (!vendor || !device) { |
| pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
| pci_read_config32(dev, PCI_VENDOR_ID)); |
| } else { |
| pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
| ((device & 0xffff) << 16) | (vendor & 0xffff)); |
| } |
| } |
| |
| static struct pci_operations lops_pci = { |
| .set_subsystem = &usb_xhci_set_subsystem, |
| }; |
| |
| static struct device_operations usb_xhci_ops = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = usb_xhci_init, |
| .ops_pci = &lops_pci, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { 0x8c31, /* LynxPoint-H */ |
| 0x9c31, /* LynxPoint-LP */ |
| 0 }; |
| |
| static const struct pci_driver pch_usb_xhci __pci_driver = { |
| .ops = &usb_xhci_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |
| #endif /* !__SMM__ */ |