| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <amdblocks/acpimmio.h> |
| #include <amdblocks/ioapic.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/smbus.h> |
| #include <device/smbus_host.h> |
| #include <arch/ioapic.h> |
| |
| static void sm_init(struct device *dev) |
| { |
| fch_enable_ioapic_decode(); |
| setup_ioapic(VIO_APIC_VADDR, FCH_IOAPIC_ID); |
| fch_configure_hpet(); |
| } |
| |
| static u32 get_sm_mmio(struct device *dev) |
| { |
| /* |
| * Since SMBus and ASF controller are behind the same PCIe device, we don't know behind |
| * which controller a device is. We assume here that the devices are behind the SMBus |
| * controller. The proper solution would be to handle those as MMIO devices instead of |
| * PCI ones. |
| */ |
| return (uintptr_t)acpimmio_smbus; |
| } |
| |
| static int lsmbus_recv_byte(struct device *dev) |
| { |
| u8 device; |
| |
| device = dev->path.i2c.device; |
| return do_smbus_recv_byte(get_sm_mmio(dev), device); |
| } |
| |
| static int lsmbus_send_byte(struct device *dev, u8 val) |
| { |
| u8 device; |
| |
| device = dev->path.i2c.device; |
| return do_smbus_send_byte(get_sm_mmio(dev), device, val); |
| } |
| |
| static int lsmbus_read_byte(struct device *dev, u8 address) |
| { |
| u8 device; |
| |
| device = dev->path.i2c.device; |
| return do_smbus_read_byte(get_sm_mmio(dev), device, address); |
| } |
| |
| static int lsmbus_write_byte(struct device *dev, u8 address, u8 val) |
| { |
| u8 device; |
| |
| device = dev->path.i2c.device; |
| return do_smbus_write_byte(get_sm_mmio(dev), device, address, val); |
| } |
| |
| static struct smbus_bus_operations lops_smbus_bus = { |
| .recv_byte = lsmbus_recv_byte, |
| .send_byte = lsmbus_send_byte, |
| .read_byte = lsmbus_read_byte, |
| .write_byte = lsmbus_write_byte, |
| }; |
| |
| #if CONFIG(HAVE_ACPI_TABLES) |
| static const char *smbus_acpi_name(const struct device *dev) |
| { |
| return "SBUS"; |
| } |
| #endif |
| |
| static struct device_operations smbus_ops = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = sm_init, |
| .scan_bus = scan_smbus, |
| .ops_pci = &pci_dev_ops_pci, |
| .ops_smbus_bus = &lops_smbus_bus, |
| #if CONFIG(HAVE_ACPI_TABLES) |
| .acpi_name = smbus_acpi_name, |
| #endif |
| }; |
| |
| static const struct pci_driver smbus_driver __pci_driver = { |
| .ops = &smbus_ops, |
| .vendor = PCI_VENDOR_ID_AMD, |
| .device = PCI_DEVICE_ID_AMD_CZ_SMBUS, |
| }; |