| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <memory> |
| |
| #include <ddk/binding.h> |
| #include <ddk/debug.h> |
| #include <ddk/device.h> |
| #include <ddk/metadata.h> |
| #include <ddk/metadata/clock.h> |
| #include <fbl/alloc_checker.h> |
| #include <fbl/auto_call.h> |
| #include <fbl/unique_ptr.h> |
| #include <zircon/types.h> |
| |
| #include "clock.h" |
| |
| namespace clock { |
| |
| zx_status_t ClockDevice::ClockEnable() { |
| return clock_.Enable(id_); |
| } |
| |
| zx_status_t ClockDevice::ClockDisable() { |
| return clock_.Disable(id_); |
| } |
| |
| void ClockDevice::DdkUnbind() { |
| DdkRemove(); |
| } |
| |
| void ClockDevice::DdkRelease() { |
| delete this; |
| } |
| |
| zx_status_t ClockDevice::Create(void* ctx, zx_device_t* parent) { |
| clock_impl_protocol_t clock_proto; |
| auto status = device_get_protocol(parent, ZX_PROTOCOL_CLOCK_IMPL, &clock_proto); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| size_t metadata_size; |
| status = device_get_metadata_size(parent, DEVICE_METADATA_CLOCK_IDS, &metadata_size); |
| if (status != ZX_OK) { |
| return status; |
| } |
| auto clock_count = metadata_size / sizeof(clock_id_t); |
| |
| fbl::AllocChecker ac; |
| std::unique_ptr<clock_id_t[]> clock_ids(new (&ac) clock_id_t[clock_count]); |
| if (!ac.check()) { |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| size_t actual; |
| status = device_get_metadata(parent, DEVICE_METADATA_CLOCK_IDS, clock_ids.get(), metadata_size, |
| &actual); |
| if (status != ZX_OK) { |
| return status; |
| } |
| if (actual != metadata_size) { |
| return ZX_ERR_INTERNAL; |
| } |
| |
| for (uint32_t i = 0; i < clock_count; i++) { |
| auto clock_id = clock_ids[i].clock_id; |
| fbl::AllocChecker ac; |
| std::unique_ptr<ClockDevice> dev(new (&ac) ClockDevice(parent, &clock_proto, clock_id)); |
| if (!ac.check()) { |
| return ZX_ERR_NO_MEMORY; |
| } |
| |
| char name[20]; |
| snprintf(name, sizeof(name), "clock-%u", clock_id); |
| zx_device_prop_t props[] = { |
| { BIND_CLOCK_ID, 0, clock_id }, |
| }; |
| |
| status = dev->DdkAdd(name, 0, props, countof(props)); |
| if (status != ZX_OK) { |
| return status; |
| } |
| |
| // dev is now owned by devmgr. |
| __UNUSED auto ptr = dev.release(); |
| } |
| |
| return ZX_OK; |
| } |
| |
| static zx_driver_ops_t driver_ops = [](){ |
| zx_driver_ops_t ops; |
| ops.version = DRIVER_OPS_VERSION; |
| ops.bind = ClockDevice::Create; |
| return ops; |
| }(); |
| |
| } // namespace clock |
| |
| ZIRCON_DRIVER_BEGIN(clock, clock::driver_ops, "zircon", "0.1", 1) |
| BI_MATCH_IF(EQ, BIND_PROTOCOL, ZX_PROTOCOL_CLOCK_IMPL), |
| ZIRCON_DRIVER_END(clock) |