diff options
| -rw-r--r-- | src/drivers/usb/pci_xhci/Kconfig | 6 | ||||
| -rw-r--r-- | src/drivers/usb/pci_xhci/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/drivers/usb/pci_xhci/pci_xhci.c | 184 | ||||
| -rw-r--r-- | src/drivers/usb/pci_xhci/pci_xhci.h | 15 |
4 files changed, 206 insertions, 0 deletions
diff --git a/src/drivers/usb/pci_xhci/Kconfig b/src/drivers/usb/pci_xhci/Kconfig new file mode 100644 index 0000000000..715af5b1d4 --- /dev/null +++ b/src/drivers/usb/pci_xhci/Kconfig @@ -0,0 +1,6 @@ +config DRIVERS_USB_PCI_XHCI + def_bool n + depends on HAVE_ACPI_TABLES + select XHCI_UTILS + help + PCI driver that generates ACPI nodes for an xHCI compatible controller. diff --git a/src/drivers/usb/pci_xhci/Makefile.inc b/src/drivers/usb/pci_xhci/Makefile.inc new file mode 100644 index 0000000000..73f6b068a8 --- /dev/null +++ b/src/drivers/usb/pci_xhci/Makefile.inc @@ -0,0 +1 @@ +ramstage-$(CONFIG_DRIVERS_USB_PCI_XHCI) += pci_xhci.c diff --git a/src/drivers/usb/pci_xhci/pci_xhci.c b/src/drivers/usb/pci_xhci/pci_xhci.c new file mode 100644 index 0000000000..cbd3c34b58 --- /dev/null +++ b/src/drivers/usb/pci_xhci/pci_xhci.c @@ -0,0 +1,184 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include "pci_xhci.h" +#include <acpi/acpigen.h> +#include <console/console.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/xhci.h> +#include <stdlib.h> +#include <string.h> + +#define PCI_XHCI_CLASSCODE 0x0c0330 /* USB3.0 xHCI controller */ + +static unsigned int controller_count; +static const struct device_operations xhci_pci_ops; + +struct port_counts { + unsigned int high_speed; + unsigned int super_speed; +}; + +__weak enum cb_err pci_xhci_get_wake_gpe(const struct device *dev, int *gpe) +{ + *gpe = -1; + return CB_SUCCESS; +} + +static const char *xhci_acpi_name(const struct device *dev) +{ + char *name; + unsigned int port_id; + + if (dev->path.type == DEVICE_PATH_USB) { + /* Ports index start at 1 */ + port_id = dev->path.usb.port_id + 1; + + switch (dev->path.usb.port_type) { + case 0: + return "RHUB"; + case 2: + name = malloc(ACPI_NAME_BUFFER_SIZE); + snprintf(name, ACPI_NAME_BUFFER_SIZE, "HS%02d", port_id); + name[4] = '\0'; + + return name; + case 3: + name = malloc(ACPI_NAME_BUFFER_SIZE); + snprintf(name, ACPI_NAME_BUFFER_SIZE, "SS%02d", port_id); + name[4] = '\0'; + return name; + } + } else if (dev->ops == &xhci_pci_ops) { + return dev->name; + } + + printk(BIOS_ERR, "%s: Unknown device %s\n", __func__, dev_path(dev)); + return NULL; +} + +static void handle_xhci_ext_cap(void *context, const struct xhci_ext_cap *cap) +{ + const struct xhci_supported_protocol *data; + const char *format; + char buf[16]; + struct port_counts *counts = context; + unsigned int *dev_num; + + if (cap->cap_id != XHCI_ECP_CAP_ID_SUPP) + return; + + data = &cap->supported_protocol; + + xhci_print_supported_protocol(data); + + if (memcmp(data->name, "USB ", 4)) { + printk(BIOS_INFO, "%s: Unknown Protocol: %.*s\n", __func__, + (int)sizeof(data->name), data->name); + return; + } + + if (data->major_rev == 3) { + format = "SS%02d"; + dev_num = &counts->super_speed; + } else if (data->major_rev == 2) { + format = "HS%02d"; + dev_num = &counts->high_speed; + } else { + printk(BIOS_INFO, "%s: Unknown USB Version: %#x\n", __func__, data->major_rev); + return; + } + + for (unsigned int i = 0; i < data->port_count; ++i) { + snprintf(buf, sizeof(buf), format, ++(*dev_num)); + acpigen_write_device(buf); + acpigen_write_name_byte("_ADR", data->port_offset + i); + acpigen_pop_len(); + } +} + +static void xhci_add_devices(const struct device *dev) +{ + /* Used by the callback to track how many ports have been seen. */ + struct port_counts counts = {0, 0}; + + acpigen_write_device("RHUB"); + acpigen_write_name_integer("_ADR", 0x00000000); + + xhci_for_each_ext_cap(dev, &counts, handle_xhci_ext_cap); + + acpigen_pop_len(); +} + +static void xhci_fill_ssdt(const struct device *dev) +{ + int gpe; + + printk(BIOS_DEBUG, "xHCI SSDT generation\n"); + + acpigen_write_scope(acpi_device_scope(dev)); + acpigen_write_device(acpi_device_name(dev)); + + acpigen_write_ADR_pci_device(dev); + acpigen_write_name_string("_DDN", "xHC - Extensible Host Controller"); + acpigen_write_STA(acpi_device_status(dev)); + + if (pci_xhci_get_wake_gpe(dev, &gpe) == CB_SUCCESS) { + printk(BIOS_DEBUG, "%s: Got GPE %d for %s\n", __func__, gpe, dev_path(dev)); + } else { + printk(BIOS_ERR, "%s: Error getting GPE for : %s\n", __func__, dev_path(dev)); + gpe = -1; + } + + if (gpe > 0) { + acpigen_write_PRW(gpe, SLP_TYP_S3); + acpigen_write_name_integer("_S0W", ACPI_DEVICE_SLEEP_D0); + acpigen_write_name_integer("_S3W", ACPI_DEVICE_SLEEP_D3_COLD); + acpigen_write_name_integer("_S4W", ACPI_DEVICE_SLEEP_D3_COLD); + } + + xhci_add_devices(dev); + + acpigen_pop_len(); + acpigen_pop_len(); +} + +static void xhci_enable(struct device *dev) +{ + char *name; + uint32_t class = pci_read_config32(dev, PCI_CLASS_REVISION); + /* Class code, the upper 3 bytes of PCI_CLASS_REVISION. */ + class >>= 8; + + if (class != PCI_XHCI_CLASSCODE) { + printk(BIOS_ERR, "Incorrect xHCI class code: %#x\n", class); + dev->enabled = 0; + return; + } + + name = malloc(ACPI_NAME_BUFFER_SIZE); + snprintf(name, ACPI_NAME_BUFFER_SIZE, "XHC%d", controller_count++); + dev->name = name; +} + +static const struct device_operations xhci_pci_ops = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = pci_dev_init, + .scan_bus = scan_static_bus, + .enable = xhci_enable, + .ops_pci = &pci_dev_ops_pci, + .acpi_fill_ssdt = xhci_fill_ssdt, + .acpi_name = xhci_acpi_name, +}; + +static const unsigned short amd_pci_device_ids[] = { + 0 +}; + +static const struct pci_driver xhci_pci_driver __pci_driver = { + .ops = &xhci_pci_ops, + .vendor = PCI_VENDOR_ID_AMD, + .devices = amd_pci_device_ids, +}; diff --git a/src/drivers/usb/pci_xhci/pci_xhci.h b/src/drivers/usb/pci_xhci/pci_xhci.h new file mode 100644 index 0000000000..a923351ac2 --- /dev/null +++ b/src/drivers/usb/pci_xhci/pci_xhci.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __DRIVERS_USB_PCI_XHCI__ +#define __DRIVERS_USB_PCI_XHCI__ + +#include <commonlib/bsd/cb_err.h> +#include <device/device.h> + +/* + * Returns the wake GPE for the Extensible Host Controller. + * Set gpe to -1 if there is no GPE is available. + */ +enum cb_err pci_xhci_get_wake_gpe(const struct device *dev, int *gpe); + +#endif /* __DRIVERS_USB_PCI_XHCI__ */ |