mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-02 07:04:24 +00:00
greybus: legacy: remove legacy driver support
This patch removes the greybus legacy driver support Signed-off-by: David Lin <dtwlin@google.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
David Lin
Greg Kroah-Hartman
parent
68b66c2801
commit
428888a2b6
8 changed files with 1 additions and 564 deletions
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@ -11,8 +11,7 @@ greybus-y := core.o \
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svc.o \
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svc_watchdog.o \
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bootrom.o \
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operation.o \
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legacy.o
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operation.o
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gb-gbphy-y := gbphy.o
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@ -43,7 +43,6 @@ struct gb_connection {
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gb_request_handler_t handler;
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unsigned long flags;
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struct gb_protocol *protocol;
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u8 module_major;
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u8 module_minor;
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@ -13,7 +13,6 @@
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#include "bootrom.h"
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#include "greybus.h"
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#include "greybus_trace.h"
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#include "legacy.h"
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EXPORT_TRACEPOINT_SYMBOL_GPL(gb_host_device_send);
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EXPORT_TRACEPOINT_SYMBOL_GPL(gb_host_device_recv);
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@ -266,16 +265,8 @@ static int __init gb_init(void)
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goto error_bootrom;
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}
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retval = gb_legacy_init();
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if (retval) {
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pr_err("gb_legacy_init failed\n");
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goto error_legacy;
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}
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return 0; /* Success */
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error_legacy:
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gb_bootrom_exit();
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error_bootrom:
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gb_operation_exit();
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error_operation:
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@ -291,7 +282,6 @@ module_init(gb_init);
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static void __exit gb_exit(void)
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{
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gb_legacy_exit();
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gb_bootrom_exit();
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gb_operation_exit();
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gb_hd_exit();
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@ -32,7 +32,6 @@
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#include "interface.h"
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#include "bundle.h"
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#include "connection.h"
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#include "protocol.h"
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#include "operation.h"
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@ -1,258 +0,0 @@
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/*
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* Greybus legacy-protocol driver
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*
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* Copyright 2015 Google Inc.
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* Copyright 2015 Linaro Ltd.
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*
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* Released under the GPLv2 only.
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*/
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#include "greybus.h"
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#include "legacy.h"
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#include "protocol.h"
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struct legacy_connection {
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struct gb_connection *connection;
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bool initialized;
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struct gb_protocol *protocol;
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};
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struct legacy_data {
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size_t num_cports;
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struct legacy_connection *connections;
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};
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static int legacy_connection_get_version(struct gb_connection *connection)
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{
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int ret;
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ret = gb_protocol_get_version(connection);
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if (ret) {
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dev_err(&connection->hd->dev,
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"%s: failed to get protocol version: %d\n",
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connection->name, ret);
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return ret;
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}
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return 0;
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}
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static int legacy_request_handler(struct gb_operation *operation)
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{
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struct gb_protocol *protocol = operation->connection->protocol;
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return protocol->request_recv(operation->type, operation);
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}
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static int legacy_connection_init(struct legacy_connection *lc)
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{
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struct gb_connection *connection = lc->connection;
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int ret;
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dev_dbg(&connection->bundle->dev, "%s - %s\n", __func__,
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connection->name);
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ret = gb_connection_enable(connection);
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if (ret)
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return ret;
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ret = legacy_connection_get_version(connection);
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if (ret)
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goto err_disable;
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ret = connection->protocol->connection_init(connection);
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if (ret)
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goto err_disable;
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lc->initialized = true;
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return 0;
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err_disable:
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gb_connection_disable(connection);
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return ret;
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}
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static void legacy_connection_exit(struct legacy_connection *lc)
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{
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struct gb_connection *connection = lc->connection;
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if (!lc->initialized)
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return;
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gb_connection_disable(connection);
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connection->protocol->connection_exit(connection);
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lc->initialized = false;
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}
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static int legacy_connection_create(struct legacy_connection *lc,
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struct gb_bundle *bundle,
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struct greybus_descriptor_cport *desc)
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{
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struct gb_connection *connection;
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struct gb_protocol *protocol;
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gb_request_handler_t handler;
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u8 major, minor;
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int ret;
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/*
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* The legacy protocols have always been looked up using a hard-coded
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* version of 0.1, despite (or perhaps rather, due to) the fact that
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* module version negotiation could not take place until after the
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* protocol was bound.
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*/
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major = 0;
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minor = 1;
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protocol = gb_protocol_get(desc->protocol_id, major, minor);
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if (!protocol) {
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dev_err(&bundle->dev,
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"protocol 0x%02x version %u.%u not found\n",
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desc->protocol_id, major, minor);
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return -EPROTONOSUPPORT;
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}
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if (protocol->request_recv)
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handler = legacy_request_handler;
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else
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handler = NULL;
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connection = gb_connection_create(bundle, le16_to_cpu(desc->id),
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handler);
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if (IS_ERR(connection)) {
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ret = PTR_ERR(connection);
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goto err_protocol_put;
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}
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/*
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* NOTE: We need to keep a pointer to the protocol in the actual
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* connection structure for now.
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*/
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connection->protocol = protocol;
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lc->connection = connection;
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lc->protocol = protocol;
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return 0;
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err_protocol_put:
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gb_protocol_put(protocol);
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return ret;
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}
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static void legacy_connection_destroy(struct legacy_connection *lc)
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{
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if (!lc->connection)
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return;
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lc->connection->protocol = NULL;
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gb_connection_destroy(lc->connection);
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gb_protocol_put(lc->protocol);
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}
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static int legacy_probe(struct gb_bundle *bundle,
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const struct greybus_bundle_id *id)
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{
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struct greybus_descriptor_cport *cport_desc;
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struct legacy_data *data;
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struct legacy_connection *lc;
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int i;
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int ret;
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dev_dbg(&bundle->dev,
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"%s - bundle class = 0x%02x, num_cports = %zu\n",
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__func__, bundle->class, bundle->num_cports);
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->num_cports = bundle->num_cports;
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data->connections = kcalloc(data->num_cports,
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sizeof(*data->connections),
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GFP_KERNEL);
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if (!data->connections) {
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ret = -ENOMEM;
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goto err_free_data;
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}
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for (i = 0; i < data->num_cports; ++i) {
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cport_desc = &bundle->cport_desc[i];
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lc = &data->connections[i];
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ret = legacy_connection_create(lc, bundle, cport_desc);
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if (ret)
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goto err_connections_destroy;
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}
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greybus_set_drvdata(bundle, data);
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for (i = 0; i < data->num_cports; ++i) {
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lc = &data->connections[i];
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ret = legacy_connection_init(lc);
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if (ret)
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goto err_connections_disable;
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}
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return 0;
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err_connections_disable:
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for (--i; i >= 0; --i)
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legacy_connection_exit(&data->connections[i]);
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err_connections_destroy:
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for (i = 0; i < data->num_cports; ++i)
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legacy_connection_destroy(&data->connections[i]);
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kfree(data->connections);
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err_free_data:
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kfree(data);
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return ret;
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}
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static void legacy_disconnect(struct gb_bundle *bundle)
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{
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struct legacy_data *data = greybus_get_drvdata(bundle);
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int i;
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dev_dbg(&bundle->dev, "%s - bundle class = 0x%02x\n", __func__,
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bundle->class);
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for (i = 0; i < data->num_cports; ++i) {
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legacy_connection_exit(&data->connections[i]);
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legacy_connection_destroy(&data->connections[i]);
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}
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kfree(data->connections);
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kfree(data);
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}
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static const struct greybus_bundle_id legacy_id_table[] = {
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{ }
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};
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MODULE_DEVICE_TABLE(greybus, legacy_id_table);
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static struct greybus_driver legacy_driver = {
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.name = "legacy",
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.probe = legacy_probe,
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.disconnect = legacy_disconnect,
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.id_table = legacy_id_table,
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};
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int gb_legacy_init(void)
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{
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return greybus_register(&legacy_driver);
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}
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void gb_legacy_exit(void)
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{
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greybus_deregister(&legacy_driver);
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}
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@ -1,16 +0,0 @@
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/*
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* Greybus legacy-protocol driver
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*
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* Copyright 2015 Google Inc.
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* Copyright 2015 Linaro Ltd.
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*
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* Released under the GPLv2 only.
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*/
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#ifndef __LEGACY_H
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#define __LEGACY_H
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int gb_legacy_init(void);
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void gb_legacy_exit(void);
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#endif /* __LEGACY_H */
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@ -1,201 +0,0 @@
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/*
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* Greybus protocol handling
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*
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* Copyright 2014-2015 Google Inc.
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* Copyright 2014-2015 Linaro Ltd.
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*
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* Released under the GPLv2 only.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "greybus.h"
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/* Global list of registered protocols */
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static DEFINE_SPINLOCK(gb_protocols_lock);
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static LIST_HEAD(gb_protocols);
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/* Caller must hold gb_protocols_lock */
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static struct gb_protocol *gb_protocol_find(u8 id, u8 major, u8 minor)
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{
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struct gb_protocol *protocol;
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list_for_each_entry(protocol, &gb_protocols, links) {
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if (protocol->id < id)
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continue;
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if (protocol->id > id)
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break;
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if (protocol->major > major)
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continue;
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if (protocol->major < major)
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break;
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if (protocol->minor > minor)
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continue;
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if (protocol->minor < minor)
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break;
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return protocol;
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}
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return NULL;
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}
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int __gb_protocol_register(struct gb_protocol *protocol, struct module *module)
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{
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struct gb_protocol *existing;
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u8 id = protocol->id;
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u8 major = protocol->major;
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u8 minor = protocol->minor;
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protocol->owner = module;
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/*
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* The protocols list is sorted first by protocol id (low to
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* high), then by major version (high to low), and finally
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* by minor version (high to low). Searching only by
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* protocol id will produce the newest implemented version
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* of the protocol.
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*/
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spin_lock_irq(&gb_protocols_lock);
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list_for_each_entry(existing, &gb_protocols, links) {
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if (existing->id < id)
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continue;
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if (existing->id > id)
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break;
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if (existing->major > major)
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continue;
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if (existing->major < major)
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break;
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if (existing->minor > minor)
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continue;
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if (existing->minor < minor)
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break;
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/* A matching protocol has already been registered */
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spin_unlock_irq(&gb_protocols_lock);
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return -EEXIST;
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}
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/*
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* We need to insert the protocol here, before the existing one
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* (or before the head if we searched the whole list)
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*/
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list_add_tail(&protocol->links, &existing->links);
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spin_unlock_irq(&gb_protocols_lock);
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pr_info("Registered %s protocol.\n", protocol->name);
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return 0;
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}
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EXPORT_SYMBOL_GPL(__gb_protocol_register);
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/*
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* De-register a previously registered protocol.
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*/
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void gb_protocol_deregister(struct gb_protocol *protocol)
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{
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if (!protocol)
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return;
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spin_lock_irq(&gb_protocols_lock);
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protocol = gb_protocol_find(protocol->id, protocol->major,
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protocol->minor);
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if (WARN_ON(!protocol || protocol->count)) {
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spin_unlock_irq(&gb_protocols_lock);
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return;
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}
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list_del(&protocol->links);
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spin_unlock_irq(&gb_protocols_lock);
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pr_info("Deregistered %s protocol.\n", protocol->name);
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}
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EXPORT_SYMBOL_GPL(gb_protocol_deregister);
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/* Returns the requested protocol if available, or a null pointer */
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struct gb_protocol *gb_protocol_get(u8 id, u8 major, u8 minor)
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{
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struct gb_protocol *protocol;
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u8 protocol_count;
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spin_lock_irq(&gb_protocols_lock);
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protocol = gb_protocol_find(id, major, minor);
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if (protocol) {
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if (!try_module_get(protocol->owner)) {
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protocol = NULL;
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} else {
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protocol_count = protocol->count;
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if (protocol_count != U8_MAX)
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protocol->count++;
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}
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}
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spin_unlock_irq(&gb_protocols_lock);
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if (protocol)
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WARN_ON(protocol_count == U8_MAX);
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return protocol;
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}
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EXPORT_SYMBOL_GPL(gb_protocol_get);
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int gb_protocol_get_version(struct gb_connection *connection)
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{
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struct gb_protocol_version_request request;
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struct gb_protocol_version_response response;
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struct gb_protocol *protocol = connection->protocol;
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int retval;
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request.major = protocol->major;
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request.minor = protocol->minor;
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retval = gb_operation_sync(connection, GB_REQUEST_TYPE_PROTOCOL_VERSION,
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&request, sizeof(request), &response,
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sizeof(response));
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if (retval)
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return retval;
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if (response.major > connection->protocol->major) {
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dev_err(&connection->hd->dev,
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"%s: unsupported major version (%u > %u)\n",
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connection->name, response.major,
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connection->protocol->major);
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return -ENOTSUPP;
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}
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connection->module_major = response.major;
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connection->module_minor = response.minor;
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dev_dbg(&connection->hd->dev,
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"%s: %s (0x%02x) v%u.%u\n", connection->name,
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protocol->name, protocol->id, response.major, response.minor);
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return 0;
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}
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EXPORT_SYMBOL_GPL(gb_protocol_get_version);
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void gb_protocol_put(struct gb_protocol *protocol)
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{
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u8 id;
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u8 major;
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u8 minor;
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id = protocol->id;
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major = protocol->major;
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minor = protocol->minor;
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spin_lock_irq(&gb_protocols_lock);
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protocol = gb_protocol_find(id, major, minor);
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if (WARN_ON(!protocol || !protocol->count))
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goto out;
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protocol->count--;
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module_put(protocol->owner);
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out:
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spin_unlock_irq(&gb_protocols_lock);
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}
|
||||
EXPORT_SYMBOL_GPL(gb_protocol_put);
|
||||
|
|
@ -1,75 +0,0 @@
|
|||
/*
|
||||
* Greybus protocol handling
|
||||
*
|
||||
* Copyright 2014 Google Inc.
|
||||
* Copyright 2014 Linaro Ltd.
|
||||
*
|
||||
* Released under the GPLv2 only.
|
||||
*/
|
||||
|
||||
#ifndef __PROTOCOL_H
|
||||
#define __PROTOCOL_H
|
||||
|
||||
struct gb_connection;
|
||||
struct gb_operation;
|
||||
|
||||
typedef int (*gb_connection_init_t)(struct gb_connection *);
|
||||
typedef void (*gb_connection_exit_t)(struct gb_connection *);
|
||||
typedef int (*gb_request_recv_t)(u8, struct gb_operation *);
|
||||
|
||||
/*
|
||||
* Protocols having the same id but different major and/or minor
|
||||
* version numbers are treated as distinct protocols. If it makes
|
||||
* sense someday we could group protocols having the same id.
|
||||
*/
|
||||
struct gb_protocol {
|
||||
u8 id;
|
||||
u8 major;
|
||||
u8 minor;
|
||||
u8 count;
|
||||
|
||||
struct list_head links; /* global list */
|
||||
|
||||
gb_connection_init_t connection_init;
|
||||
gb_connection_exit_t connection_exit;
|
||||
gb_request_recv_t request_recv;
|
||||
struct module *owner;
|
||||
char *name;
|
||||
};
|
||||
|
||||
int __gb_protocol_register(struct gb_protocol *protocol, struct module *module);
|
||||
void gb_protocol_deregister(struct gb_protocol *protocol);
|
||||
|
||||
#define gb_protocol_register(protocol) \
|
||||
__gb_protocol_register(protocol, THIS_MODULE)
|
||||
|
||||
struct gb_protocol *gb_protocol_get(u8 id, u8 major, u8 minor);
|
||||
int gb_protocol_get_version(struct gb_connection *connection);
|
||||
|
||||
void gb_protocol_put(struct gb_protocol *protocol);
|
||||
|
||||
/* __protocol: Pointer to struct gb_protocol */
|
||||
#define gb_protocol_driver(__protocol) \
|
||||
static int __init protocol_init(void) \
|
||||
{ \
|
||||
return gb_protocol_register(__protocol); \
|
||||
} \
|
||||
module_init(protocol_init); \
|
||||
static void __exit protocol_exit(void) \
|
||||
{ \
|
||||
gb_protocol_deregister(__protocol); \
|
||||
} \
|
||||
module_exit(protocol_exit)
|
||||
|
||||
/* __protocol: string matching name of struct gb_protocol */
|
||||
#define gb_builtin_protocol_driver(__protocol) \
|
||||
int __init gb_##__protocol##_init(void) \
|
||||
{ \
|
||||
return gb_protocol_register(&__protocol); \
|
||||
} \
|
||||
void gb_##__protocol##_exit(void) \
|
||||
{ \
|
||||
gb_protocol_deregister(&__protocol); \
|
||||
} \
|
||||
|
||||
#endif /* __PROTOCOL_H */
|
||||
Loading…
Reference in a new issue