diff options
| -rw-r--r-- | drivers/staging/greybus/Makefile | 2 | ||||
| -rw-r--r-- | drivers/staging/greybus/fw-core.c | 123 | ||||
| -rw-r--r-- | drivers/staging/greybus/greybus_manifest.h | 3 |
3 files changed, 128 insertions, 0 deletions
diff --git a/drivers/staging/greybus/Makefile b/drivers/staging/greybus/Makefile index 5bdcccc..1a120d9 100644 --- a/drivers/staging/greybus/Makefile +++ b/drivers/staging/greybus/Makefile @@ -39,6 +39,7 @@ gb-audio-apbridgea-y := audio_apbridgea.o gb-audio-manager-y += audio_manager.o gb-audio-manager-y += audio_manager_module.o gb-camera-y := camera.o +gb-firmware-y := fw-core.o obj-m += greybus.o obj-m += gb-phy.o @@ -60,6 +61,7 @@ endif obj-m += gb-audio-gb.o obj-m += gb-audio-apbridgea.o obj-m += gb-audio-manager.o +obj-m += gb-firmware.o KERNELVER ?= $(shell uname -r) KERNELDIR ?= /lib/modules/$(KERNELVER)/build diff --git a/drivers/staging/greybus/fw-core.c b/drivers/staging/greybus/fw-core.c new file mode 100644 index 0000000..4720d59 --- /dev/null +++ b/drivers/staging/greybus/fw-core.c @@ -0,0 +1,123 @@ +/* + * Greybus Firmware Core Bundle Driver. + * + * Copyright 2016 Google Inc. + * Copyright 2016 Linaro Ltd. + * + * Released under the GPLv2 only. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/firmware.h> +#include "greybus.h" + +struct gb_fw_core { + struct gb_connection *mgmt_connection; +}; + +static int gb_fw_core_probe(struct gb_bundle *bundle, + const struct greybus_bundle_id *id) +{ + struct greybus_descriptor_cport *cport_desc; + struct gb_connection *connection; + struct gb_fw_core *fw_core; + int ret, i; + u16 cport_id; + u8 protocol_id; + + fw_core = kzalloc(sizeof(*fw_core), GFP_KERNEL); + if (!fw_core) + return -ENOMEM; + + /* Parse CPorts and create connections */ + for (i = 0; i < bundle->num_cports; i++) { + cport_desc = &bundle->cport_desc[i]; + cport_id = le16_to_cpu(cport_desc->id); + protocol_id = cport_desc->protocol_id; + + switch (protocol_id) { + case GREYBUS_PROTOCOL_FW_MANAGEMENT: + /* Disallow multiple Firmware Management CPorts */ + if (fw_core->mgmt_connection) { + dev_err(&bundle->dev, + "multiple management CPorts found\n"); + ret = -EINVAL; + goto err_destroy_connections; + } + + connection = gb_connection_create(bundle, cport_id, + NULL); + if (IS_ERR(connection)) { + ret = PTR_ERR(connection); + dev_err(&bundle->dev, + "failed to create management connection (%d)\n", + ret); + goto err_free_fw_core; + } + + fw_core->mgmt_connection = connection; + break; + default: + dev_err(&bundle->dev, "invalid protocol id (0x%02x)\n", + protocol_id); + ret = -EINVAL; + goto err_free_fw_core; + } + } + + /* Firmware Management connection is mandatory */ + if (!fw_core->mgmt_connection) { + dev_err(&bundle->dev, "missing management connection\n"); + ret = -ENODEV; + goto err_free_fw_core; + } + + greybus_set_drvdata(bundle, fw_core); + + return 0; + +err_destroy_connections: + gb_connection_destroy(fw_core->mgmt_connection); +err_free_fw_core: + kfree(fw_core); + + return ret; +} + +static void gb_fw_core_disconnect(struct gb_bundle *bundle) +{ + struct gb_fw_core *fw_core = greybus_get_drvdata(bundle); + + gb_connection_destroy(fw_core->mgmt_connection); + + kfree(fw_core); +} + +static const struct greybus_bundle_id gb_fw_core_id_table[] = { + { GREYBUS_DEVICE_CLASS(GREYBUS_CLASS_FW_MANAGEMENT) }, + { } +}; + +static struct greybus_driver gb_fw_core_driver = { + .name = "gb-firmware", + .probe = gb_fw_core_probe, + .disconnect = gb_fw_core_disconnect, + .id_table = gb_fw_core_id_table, +}; + +static int fw_core_init(void) +{ + return greybus_register(&gb_fw_core_driver); +} +module_init(fw_core_init); + +static void __exit fw_core_exit(void) +{ + greybus_deregister(&gb_fw_core_driver); +} +module_exit(fw_core_exit); + +MODULE_ALIAS("greybus:firmware"); +MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>"); +MODULE_DESCRIPTION("Greybus Firmware Bundle Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/staging/greybus/greybus_manifest.h b/drivers/staging/greybus/greybus_manifest.h index 460fced..5d00f7d 100644 --- a/drivers/staging/greybus/greybus_manifest.h +++ b/drivers/staging/greybus/greybus_manifest.h @@ -45,6 +45,8 @@ enum greybus_protocol { GREYBUS_PROTOCOL_SVC = 0x14, GREYBUS_PROTOCOL_BOOTROM = 0x15, GREYBUS_PROTOCOL_CAMERA_DATA = 0x16, + GREYBUS_PROTOCOL_FW_DOWNLOAD = 0x17, + GREYBUS_PROTOCOL_FW_MANAGEMENT = 0x18, /* ... */ GREYBUS_PROTOCOL_RAW = 0xfe, GREYBUS_PROTOCOL_VENDOR = 0xff, @@ -73,6 +75,7 @@ enum greybus_class_type { /* 0x13 is unused */ /* 0x14 is unused */ GREYBUS_CLASS_BOOTROM = 0x15, + GREYBUS_CLASS_FW_MANAGEMENT = 0x16, /* ... */ GREYBUS_CLASS_RAW = 0xfe, GREYBUS_CLASS_VENDOR = 0xff, |
