^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * (c) Copyright 2003, 2006 Hewlett-Packard Development Company, L.P.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Alex Williamson <alex.williamson@hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Bjorn Helgaas <bjorn.helgaas@hp.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/acpi-ext.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Device CSRs that do not appear in PCI config space should be described
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * via ACPI. This would normally be done with Address Space Descriptors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * marked as "consumer-only," but old versions of Windows and Linux ignore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * the producer/consumer flag, so HP invented a vendor-defined resource to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * describe the location and size of CSR space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct acpi_vendor_uuid hp_ccsr_uuid = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) .subtype = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static acpi_status hp_ccsr_locate(acpi_handle obj, u64 *base, u64 *length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct acpi_resource *resource;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct acpi_resource_vendor_typed *vendor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) status = acpi_get_vendor_resource(obj, METHOD_NAME__CRS, &hp_ccsr_uuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) &buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) resource = buffer.pointer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) vendor = &resource->data.vendor_typed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (ACPI_FAILURE(status) || vendor->byte_length < 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) status = AE_NOT_FOUND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) memcpy(base, vendor->byte_data, sizeof(*base));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) memcpy(length, vendor->byte_data + 8, sizeof(*length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) kfree(buffer.pointer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct csr_space {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) u64 base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u64 length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static acpi_status find_csr_space(struct acpi_resource *resource, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct csr_space *space = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct acpi_resource_address64 addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) status = acpi_resource_to_address64(resource, &addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (ACPI_SUCCESS(status) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) addr.resource_type == ACPI_MEMORY_RANGE &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) addr.address.address_length &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) addr.producer_consumer == ACPI_CONSUMER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) space->base = addr.address.minimum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) space->length = addr.address.address_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return AE_CTRL_TERMINATE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return AE_OK; /* keep looking */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static acpi_status hp_crs_locate(acpi_handle obj, u64 *base, u64 *length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct csr_space space = { 0, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) acpi_walk_resources(obj, METHOD_NAME__CRS, find_csr_space, &space);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (!space.length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return AE_NOT_FOUND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) *base = space.base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) *length = space.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return AE_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) acpi_status hp_acpi_csr_space(acpi_handle obj, u64 *csr_base, u64 *csr_length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) status = hp_ccsr_locate(obj, csr_base, csr_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (ACPI_SUCCESS(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return hp_crs_locate(obj, csr_base, csr_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) EXPORT_SYMBOL(hp_acpi_csr_space);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags