greybus-y := core.o \
debugfs.o \
+ ap.o \
manifest.o \
endo.o \
module.o \
--- /dev/null
+/*
+ * Greybus "AP" message loop handling
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/workqueue.h>
+#include <linux/device.h>
+#include "svc_msg.h"
+#include "greybus_manifest.h"
+#include "greybus.h"
+
+struct ap_msg {
+ u8 *data;
+ size_t size;
+ struct greybus_host_device *hd;
+ struct work_struct event;
+};
+
+static struct workqueue_struct *ap_workqueue;
+
+static struct svc_msg *svc_msg_alloc(enum svc_function_id id)
+{
+ struct svc_msg *svc_msg;
+
+ svc_msg = kzalloc((sizeof *svc_msg), GFP_KERNEL);
+ if (!svc_msg)
+ return NULL;
+
+ // FIXME - verify we are only sending function IDs we should be
+ svc_msg->header.function_id = id;
+ return svc_msg;
+}
+
+static void svc_msg_free(struct svc_msg *svc_msg)
+{
+ kfree(svc_msg);
+}
+
+static int svc_msg_send(struct svc_msg *svc_msg, struct greybus_host_device *hd)
+{
+ int retval;
+
+ // FIXME - Do we need to do more than just pass it to the hd and then
+ // free it?
+ retval = hd->driver->submit_svc(svc_msg, hd);
+
+ svc_msg_free(svc_msg);
+ return retval;
+}
+
+static void svc_handshake(struct svc_function_handshake *handshake,
+ int payload_length, struct greybus_host_device *hd)
+{
+ struct svc_msg *svc_msg;
+
+ if (payload_length != sizeof(*handshake)) {
+ dev_err(hd->parent,
+ "Illegal size of svc handshake message %d\n",
+ payload_length);
+ return;
+ }
+
+ /* A new SVC communication channel, let's verify a supported version */
+ if ((handshake->version_major != GREYBUS_VERSION_MAJOR) ||
+ (handshake->version_minor != GREYBUS_VERSION_MINOR)) {
+ dev_warn(hd->parent,
+ "received invalid greybus version %u.%u\n",
+ handshake->version_major, handshake->version_minor);
+ return;
+ }
+
+ /* Validate that the handshake came from the SVC */
+ if (handshake->handshake_type != SVC_HANDSHAKE_SVC_HELLO) {
+ /* we don't know what to do with this, log it and return */
+ dev_dbg(hd->parent, "received invalid handshake type %d\n",
+ handshake->handshake_type);
+ return;
+ }
+
+ /* Send back a AP_HELLO message */
+ svc_msg = svc_msg_alloc(SVC_FUNCTION_HANDSHAKE);
+ if (!svc_msg)
+ return;
+
+ svc_msg->header.message_type = SVC_MSG_DATA;
+ svc_msg->header.payload_length =
+ cpu_to_le16(sizeof(*handshake));
+ svc_msg->handshake.version_major = GREYBUS_VERSION_MAJOR;
+ svc_msg->handshake.version_minor = GREYBUS_VERSION_MINOR;
+ svc_msg->handshake.handshake_type = SVC_HANDSHAKE_AP_HELLO;
+
+ (void)svc_msg_send(svc_msg, hd);
+}
+
+static void svc_management(struct svc_function_unipro_management *management,
+ int payload_length, struct greybus_host_device *hd)
+{
+ struct gb_interface *intf;
+ int ret;
+
+ if (payload_length != sizeof(*management)) {
+ dev_err(hd->parent,
+ "Illegal size of svc management message %d\n",
+ payload_length);
+ return;
+ }
+
+ switch (management->management_packet_type) {
+ case SVC_MANAGEMENT_AP_ID:
+ hd->device_id = management->ap_id.device_id;
+ break;
+ case SVC_MANAGEMENT_LINK_UP:
+ intf = gb_interface_find(hd, management->link_up.interface_id);
+ if (!intf) {
+ dev_err(hd->parent, "Interface ID %d not found\n",
+ management->link_up.interface_id);
+ return;
+ }
+ ret = gb_interface_init(intf, management->link_up.device_id);
+ if (ret) {
+ dev_err(hd->parent,
+ "error %d initializing interface %hhu\n",
+ ret, management->link_up.interface_id);
+ return;
+ }
+ break;
+ default:
+ dev_err(hd->parent, "Unhandled UniPro management message\n");
+ }
+}
+
+static void svc_hotplug(struct svc_function_hotplug *hotplug,
+ int payload_length, struct greybus_host_device *hd)
+{
+ u8 interface_id = hotplug->interface_id;
+
+ switch (hotplug->hotplug_event) {
+ case SVC_HOTPLUG_EVENT:
+ /* Add a new interface to the system */
+ if (payload_length != sizeof(*hotplug)) {
+ dev_err(hd->parent,
+ "Illegal size of svc hotplug message %d\n",
+ payload_length);
+ return;
+ }
+ dev_dbg(hd->parent, "interface id %d added\n", interface_id);
+ gb_interface_create(hd, interface_id);
+ break;
+
+ case SVC_HOTUNPLUG_EVENT:
+ /* Remove a interface from the system */
+ if (payload_length != sizeof(*hotplug)) {
+ dev_err(hd->parent,
+ "Illegal size of svc hotunplug message %d\n",
+ payload_length);
+ return;
+ }
+ dev_dbg(hd->parent, "interface id %d removed\n", interface_id);
+ gb_interface_remove(hd, interface_id);
+ break;
+
+ default:
+ dev_err(hd->parent,
+ "Received invalid hotplug message type %d\n",
+ hotplug->hotplug_event);
+ break;
+ }
+}
+
+static void svc_power(struct svc_function_power *power,
+ int payload_length, struct greybus_host_device *hd)
+{
+ u8 interface_id = power->interface_id;
+
+ /*
+ * The AP is only allowed to get a Battery Status message, not a Battery
+ * Status Request
+ */
+ if (power->power_type != SVC_POWER_BATTERY_STATUS) {
+ dev_err(hd->parent, "Received invalid power type %d\n",
+ power->power_type);
+ return;
+ }
+
+ /*
+ * As struct struct svc_function_power_battery_status_request is 0 bytes
+ * big, we can just check the union of the whole structure to validate
+ * the size of this message.
+ */
+ if (payload_length != sizeof(*power)) {
+ dev_err(hd->parent,
+ "Illegal size of svc power message %d\n",
+ payload_length);
+ return;
+ }
+
+ dev_dbg(hd->parent, "power status for interface id %d is %d\n",
+ interface_id, power->status.status);
+
+ // FIXME - do something with the power information, like update our
+ // battery information...
+}
+
+static void svc_epm(struct svc_function_epm *epm,
+ int payload_length, struct greybus_host_device *hd)
+{
+ /* What? An AP should not get this message */
+ dev_err(hd->parent, "Got an EPM message???\n");
+}
+
+static void svc_suspend(struct svc_function_suspend *suspend,
+ int payload_length, struct greybus_host_device *hd)
+{
+ /* What? An AP should not get this message */
+ dev_err(hd->parent, "Got an suspend message???\n");
+}
+
+static struct svc_msg *convert_ap_message(struct ap_msg *ap_msg)
+{
+ struct svc_msg *svc_msg;
+ struct svc_msg_header *header;
+ struct greybus_host_device *hd = ap_msg->hd;
+
+ svc_msg = (struct svc_msg *)ap_msg->data;
+ header = &svc_msg->header;
+
+ /* Validate the message type */
+ if (header->message_type != SVC_MSG_DATA) {
+ dev_err(hd->parent, "message type %d received?\n",
+ header->message_type);
+ return NULL;
+ }
+
+ /*
+ * The validation of the size of the message buffer happens in each
+ * svc_* function, due to the different types of messages, keeping the
+ * logic for each message only in one place.
+ */
+
+ return svc_msg;
+}
+
+static void ap_process_event(struct work_struct *work)
+{
+ struct svc_msg *svc_msg;
+ struct greybus_host_device *hd;
+ struct ap_msg *ap_msg;
+ int payload_length;
+
+ ap_msg = container_of(work, struct ap_msg, event);
+ hd = ap_msg->hd;
+
+ /* Turn the "raw" data into a real message */
+ svc_msg = convert_ap_message(ap_msg);
+ if (!svc_msg)
+ return;
+
+ payload_length = le16_to_cpu(svc_msg->header.payload_length);
+
+ /* Look at the message to figure out what to do with it */
+ switch (svc_msg->header.function_id) {
+ case SVC_FUNCTION_HANDSHAKE:
+ svc_handshake(&svc_msg->handshake, payload_length, hd);
+ break;
+ case SVC_FUNCTION_UNIPRO_NETWORK_MANAGEMENT:
+ svc_management(&svc_msg->management, payload_length, hd);
+ break;
+ case SVC_FUNCTION_HOTPLUG:
+ svc_hotplug(&svc_msg->hotplug, payload_length, hd);
+ break;
+ case SVC_FUNCTION_POWER:
+ svc_power(&svc_msg->power, payload_length, hd);
+ break;
+ case SVC_FUNCTION_EPM:
+ svc_epm(&svc_msg->epm, payload_length, hd);
+ break;
+ case SVC_FUNCTION_SUSPEND:
+ svc_suspend(&svc_msg->suspend, payload_length, hd);
+ break;
+ default:
+ dev_err(hd->parent, "received invalid SVC function ID %d\n",
+ svc_msg->header.function_id);
+ }
+
+ /* clean the message up */
+ kfree(ap_msg->data);
+ kfree(ap_msg);
+}
+
+int greybus_svc_in(struct greybus_host_device *hd, u8 *data, int size)
+{
+ struct ap_msg *ap_msg;
+
+ /*
+ * Totally naive copy the message into a new structure that we slowly
+ * create and add it to the list. Let's get this working, the odds of
+ * this being any "slow path" for AP messages is really low at this
+ * point in time, but you never know, so this comment is here to point
+ * out that maybe we should use a slab allocator, or even just not copy
+ * the data, but use it directly and force the urbs to be "new" each
+ * time.
+ */
+
+ /* Note - this can, and will, be called in interrupt context. */
+ ap_msg = kmalloc(sizeof(*ap_msg), GFP_ATOMIC);
+ if (!ap_msg)
+ return -ENOMEM;
+ ap_msg->data = kmalloc(size, GFP_ATOMIC);
+ if (!ap_msg->data) {
+ kfree(ap_msg);
+ return -ENOMEM;
+ }
+ memcpy(ap_msg->data, data, size);
+ ap_msg->size = size;
+ ap_msg->hd = hd;
+
+ INIT_WORK(&ap_msg->event, ap_process_event);
+ queue_work(ap_workqueue, &ap_msg->event);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(greybus_svc_in);
+
+int __init gb_ap_init(void)
+{
+ ap_workqueue = alloc_ordered_workqueue("greybus_ap", 0);
+ if (!ap_workqueue)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void gb_ap_exit(void)
+{
+ destroy_workqueue(ap_workqueue);
+ ap_workqueue = NULL;
+}
+
+
spin_unlock_irq(&gb_connections_lock);
- if (hd_cport_id != GB_SVC_CPORT_ID) {
- gb_svc_connection_create(hd->svc,
- hd->endo->ap_intf_id, hd_cport_id,
- bundle->intf->interface_id, cport_id);
- }
-
+ /* XXX Will have to establish connections to get version */
gb_connection_bind_protocol(connection);
if (!connection->protocol)
dev_warn(&connection->dev,
* Validate that the driver implements all of the callbacks
* so that we don't have to every time we make them.
*/
- if ((!driver->message_send) || (!driver->message_cancel)) {
+ if ((!driver->message_send) || (!driver->message_cancel) ||
+ (!driver->submit_svc)) {
pr_err("Must implement all greybus_host_driver callbacks!\n");
return ERR_PTR(-EINVAL);
}
ida_init(&hd->cport_id_map);
hd->buffer_size_max = buffer_size_max;
- /*
- * Initialize AP's SVC protocol connection:
- *
- * This is required as part of early initialization of the host device
- * as we need this connection in order to start any kind of message
- * exchange between the AP and the SVC. SVC will start with a
- * 'get-version' request followed by a 'svc-hello' message and at that
- * time we will create a fully initialized svc-connection, as we need
- * endo-id and AP's interface id for that.
- */
- if (!gb_ap_svc_connection_create(hd)) {
- kref_put_mutex(&hd->kref, free_hd, &hd_mutex);
- return ERR_PTR(-ENOMEM);
- }
-
return hd;
}
EXPORT_SYMBOL_GPL(greybus_create_hd);
goto error_bus;
}
+ retval = gb_ap_init();
+ if (retval) {
+ pr_err("gb_ap_init failed (%d)\n", retval);
+ goto error_ap;
+ }
+
retval = gb_operation_init();
if (retval) {
pr_err("gb_operation_init failed (%d)\n", retval);
error_endo:
gb_operation_exit();
error_operation:
+ gb_ap_exit();
+error_ap:
bus_unregister(&greybus_bus_type);
error_bus:
gb_debugfs_cleanup();
gb_control_protocol_exit();
gb_endo_exit();
gb_operation_exit();
+ gb_ap_exit();
bus_unregister(&greybus_bus_type);
gb_debugfs_cleanup();
}
#include <asm/unaligned.h>
#include "greybus.h"
+#include "svc_msg.h"
#include "kernel_ver.h"
/* Memory sizes for the buffers sent to/from the ES1 controller */
+#define ES1_SVC_MSG_SIZE (sizeof(struct svc_msg) + SZ_64K)
#define ES1_GBUF_MSG_SIZE_MAX 2048
static const struct usb_device_id id_table[] = {
* @usb_intf: pointer to the USB interface we are bound to.
* @hd: pointer to our greybus_host_device structure
* @control_endpoint: endpoint to send data to SVC
+ * @svc_endpoint: endpoint for SVC data in
* @cport_in_endpoint: bulk in endpoint for CPort data
* @cport-out_endpoint: bulk out endpoint for CPort data
+ * @svc_buffer: buffer for SVC messages coming in on @svc_endpoint
+ * @svc_urb: urb for SVC messages coming in on @svc_endpoint
* @cport_in_urb: array of urbs for the CPort in messages
* @cport_in_buffer: array of buffers for the @cport_in_urb urbs
* @cport_out_urb: array of urbs for the CPort out messages
struct greybus_host_device *hd;
__u8 control_endpoint;
+ __u8 svc_endpoint;
__u8 cport_in_endpoint;
__u8 cport_out_endpoint;
+ u8 *svc_buffer;
+ struct urb *svc_urb;
+
struct urb *cport_in_urb[NUM_CPORT_IN_URB];
u8 *cport_in_buffer[NUM_CPORT_IN_URB];
struct urb *cport_out_urb[NUM_CPORT_OUT_URB];
static void usb_log_disable(struct es1_ap_dev *es1);
#define ES1_TIMEOUT 500 /* 500 ms for the SVC to do something */
+static int submit_svc(struct svc_msg *svc_msg, struct greybus_host_device *hd)
+{
+ struct es1_ap_dev *es1 = hd_to_es1(hd);
+ int retval;
+
+ /* SVC messages go down our control pipe */
+ retval = usb_control_msg(es1->usb_dev,
+ usb_sndctrlpipe(es1->usb_dev,
+ es1->control_endpoint),
+ REQUEST_SVC,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
+ 0x00, 0x00,
+ (char *)svc_msg,
+ sizeof(*svc_msg),
+ ES1_TIMEOUT);
+ if (retval != sizeof(*svc_msg))
+ return retval;
+
+ return 0;
+}
static struct urb *next_free_urb(struct es1_ap_dev *es1, gfp_t gfp_mask)
{
.hd_priv_size = sizeof(struct es1_ap_dev),
.message_send = message_send,
.message_cancel = message_cancel,
+ .submit_svc = submit_svc,
};
/* Common function to report consistent warnings based on URB status */
es1->cport_in_buffer[i] = NULL;
}
+ usb_kill_urb(es1->svc_urb);
+ usb_free_urb(es1->svc_urb);
+ es1->svc_urb = NULL;
+ kfree(es1->svc_buffer);
+ es1->svc_buffer = NULL;
+
usb_set_intfdata(interface, NULL);
udev = es1->usb_dev;
greybus_remove_hd(es1->hd);
usb_put_dev(udev);
}
+/* Callback for when we get a SVC message */
+static void svc_in_callback(struct urb *urb)
+{
+ struct greybus_host_device *hd = urb->context;
+ struct device *dev = &urb->dev->dev;
+ int status = check_urb_status(urb);
+ int retval;
+
+ if (status) {
+ if ((status == -EAGAIN) || (status == -EPROTO))
+ goto exit;
+ dev_err(dev, "urb svc in error %d (dropped)\n", status);
+ return;
+ }
+
+ /* We have a message, create a new message structure, add it to the
+ * list, and wake up our thread that will process the messages.
+ */
+ greybus_svc_in(hd, urb->transfer_buffer, urb->actual_length);
+
+exit:
+ /* resubmit the urb to get more messages */
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ if (retval)
+ dev_err(dev, "Can not submit urb for AP data: %d\n", retval);
+}
+
static void cport_in_callback(struct urb *urb)
{
struct greybus_host_device *hd = urb->context;
struct usb_device *udev;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
+ bool int_in_found = false;
bool bulk_in_found = false;
bool bulk_out_found = false;
int retval = -ENOMEM;
int i;
+ u16 endo_id = 0x4755; // FIXME - get endo "ID" from the SVC
+ u8 ap_intf_id = 0x01; // FIXME - get endo "ID" from the SVC
+ u8 svc_interval = 0;
/* We need to fit a CPort ID in one byte of a message header */
BUILD_BUG_ON(CPORT_ID_MAX > U8_MAX);
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
- if (usb_endpoint_is_bulk_in(endpoint)) {
+ if (usb_endpoint_is_int_in(endpoint)) {
+ es1->svc_endpoint = endpoint->bEndpointAddress;
+ svc_interval = endpoint->bInterval;
+ int_in_found = true;
+ } else if (usb_endpoint_is_bulk_in(endpoint)) {
es1->cport_in_endpoint = endpoint->bEndpointAddress;
bulk_in_found = true;
} else if (usb_endpoint_is_bulk_out(endpoint)) {
endpoint->bEndpointAddress);
}
}
- if ((bulk_in_found == false) ||
+ if ((int_in_found == false) ||
+ (bulk_in_found == false) ||
(bulk_out_found == false)) {
dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n");
goto error;
}
+ /* Create our buffer and URB to get SVC messages, and start it up */
+ es1->svc_buffer = kmalloc(ES1_SVC_MSG_SIZE, GFP_KERNEL);
+ if (!es1->svc_buffer)
+ goto error;
+
+ es1->svc_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!es1->svc_urb)
+ goto error;
+
+ usb_fill_int_urb(es1->svc_urb, udev,
+ usb_rcvintpipe(udev, es1->svc_endpoint),
+ es1->svc_buffer, ES1_SVC_MSG_SIZE, svc_in_callback,
+ hd, svc_interval);
+
/* Allocate buffers for our cport in messages and start them up */
for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
struct urb *urb;
es1->cport_out_urb_busy[i] = false; /* just to be anal */
}
+ /*
+ * XXX Soon this will be initiated later, with a combination
+ * XXX of a Control protocol probe operation and a
+ * XXX subsequent Control protocol connected operation for
+ * XXX the SVC connection. At that point we know we're
+ * XXX properly connected to an Endo.
+ */
+ retval = greybus_endo_setup(hd, endo_id, ap_intf_id);
+ if (retval)
+ goto error;
+
+ /* Start up our svc urb, which allows events to start flowing */
+ retval = usb_submit_urb(es1->svc_urb, GFP_KERNEL);
+ if (retval)
+ goto error;
+
apb1_log_enable_dentry = debugfs_create_file("apb1_log_enable",
(S_IWUSR | S_IRUGO),
gb_debugfs_get(), es1,
#include <asm/unaligned.h>
#include "greybus.h"
+#include "svc_msg.h"
#include "kernel_ver.h"
/* Memory sizes for the buffers sent to/from the ES1 controller */
+#define ES1_SVC_MSG_SIZE (sizeof(struct svc_msg) + SZ_64K)
#define ES1_GBUF_MSG_SIZE_MAX 2048
static const struct usb_device_id id_table[] = {
* @usb_intf: pointer to the USB interface we are bound to.
* @hd: pointer to our greybus_host_device structure
* @control_endpoint: endpoint to send data to SVC
+ * @svc_endpoint: endpoint for SVC data in
+ * @svc_buffer: buffer for SVC messages coming in on @svc_endpoint
+ * @svc_urb: urb for SVC messages coming in on @svc_endpoint
* @cport_in: endpoint, urbs and buffer for cport in messages
* @cport_out: endpoint for for cport out messages
* @cport_out_urb: array of urbs for the CPort out messages
struct greybus_host_device *hd;
__u8 control_endpoint;
+ __u8 svc_endpoint;
+
+ u8 *svc_buffer;
+ struct urb *svc_urb;
struct es1_cport_in cport_in[NUM_BULKS];
struct es1_cport_out cport_out[NUM_BULKS];
}
#define ES1_TIMEOUT 500 /* 500 ms for the SVC to do something */
+static int submit_svc(struct svc_msg *svc_msg, struct greybus_host_device *hd)
+{
+ struct es1_ap_dev *es1 = hd_to_es1(hd);
+ int retval;
+
+ /* SVC messages go down our control pipe */
+ retval = usb_control_msg(es1->usb_dev,
+ usb_sndctrlpipe(es1->usb_dev,
+ es1->control_endpoint),
+ REQUEST_SVC,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
+ 0x00, 0x00,
+ (char *)svc_msg,
+ sizeof(*svc_msg),
+ ES1_TIMEOUT);
+ if (retval != sizeof(*svc_msg))
+ return retval;
+
+ return 0;
+}
static int ep_in_use(struct es1_ap_dev *es1, int bulk_ep_set)
{
.hd_priv_size = sizeof(struct es1_ap_dev),
.message_send = message_send,
.message_cancel = message_cancel,
+ .submit_svc = submit_svc,
};
/* Common function to report consistent warnings based on URB status */
}
}
+ usb_kill_urb(es1->svc_urb);
+ usb_free_urb(es1->svc_urb);
+ es1->svc_urb = NULL;
+ kfree(es1->svc_buffer);
+ es1->svc_buffer = NULL;
+
usb_set_intfdata(interface, NULL);
udev = es1->usb_dev;
greybus_remove_hd(es1->hd);
usb_put_dev(udev);
}
+/* Callback for when we get a SVC message */
+static void svc_in_callback(struct urb *urb)
+{
+ struct greybus_host_device *hd = urb->context;
+ struct device *dev = &urb->dev->dev;
+ int status = check_urb_status(urb);
+ int retval;
+
+ if (status) {
+ if ((status == -EAGAIN) || (status == -EPROTO))
+ goto exit;
+ dev_err(dev, "urb svc in error %d (dropped)\n", status);
+ return;
+ }
+
+ /* We have a message, create a new message structure, add it to the
+ * list, and wake up our thread that will process the messages.
+ */
+ greybus_svc_in(hd, urb->transfer_buffer, urb->actual_length);
+
+exit:
+ /* resubmit the urb to get more messages */
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ if (retval)
+ dev_err(dev, "Can not submit urb for AP data: %d\n", retval);
+}
+
static void cport_in_callback(struct urb *urb)
{
struct greybus_host_device *hd = urb->context;
struct usb_device *udev;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
+ bool int_in_found = false;
int bulk_in = 0;
int bulk_out = 0;
int retval = -ENOMEM;
int i;
+ u16 endo_id = 0x4755; // FIXME - get endo "ID" from the SVC
+ u8 ap_intf_id = 0x01; // FIXME - get endo "ID" from the SVC
+ u8 svc_interval = 0;
/* We need to fit a CPort ID in one byte of a message header */
BUILD_BUG_ON(CPORT_ID_MAX > U8_MAX);
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
- if (usb_endpoint_is_bulk_in(endpoint)) {
+ if (usb_endpoint_is_int_in(endpoint)) {
+ es1->svc_endpoint = endpoint->bEndpointAddress;
+ svc_interval = endpoint->bInterval;
+ int_in_found = true;
+ } else if (usb_endpoint_is_bulk_in(endpoint)) {
es1->cport_in[bulk_in++].endpoint =
endpoint->bEndpointAddress;
} else if (usb_endpoint_is_bulk_out(endpoint)) {
endpoint->bEndpointAddress);
}
}
- if ((bulk_in == 0) ||
+ if ((int_in_found == false) ||
+ (bulk_in == 0) ||
(bulk_out == 0)) {
dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n");
goto error;
}
+ /* Create our buffer and URB to get SVC messages, and start it up */
+ es1->svc_buffer = kmalloc(ES1_SVC_MSG_SIZE, GFP_KERNEL);
+ if (!es1->svc_buffer)
+ goto error;
+
+ es1->svc_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!es1->svc_urb)
+ goto error;
+
+ usb_fill_int_urb(es1->svc_urb, udev,
+ usb_rcvintpipe(udev, es1->svc_endpoint),
+ es1->svc_buffer, ES1_SVC_MSG_SIZE, svc_in_callback,
+ hd, svc_interval);
+
/* Allocate buffers for our cport in messages and start them up */
for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) {
struct es1_cport_in *cport_in = &es1->cport_in[bulk_in];
es1->cport_out_urb_busy[i] = false; /* just to be anal */
}
+ /*
+ * XXX Soon this will be initiated later, with a combination
+ * XXX of a Control protocol probe operation and a
+ * XXX subsequent Control protocol connected operation for
+ * XXX the SVC connection. At that point we know we're
+ * XXX properly connected to an Endo.
+ */
+ retval = greybus_endo_setup(hd, endo_id, ap_intf_id);
+ if (retval)
+ goto error;
+
+ /* Start up our svc urb, which allows events to start flowing */
+ retval = usb_submit_urb(es1->svc_urb, GFP_KERNEL);
+ if (retval)
+ goto error;
+
apb1_log_enable_dentry = debugfs_create_file("apb1_log_enable",
(S_IWUSR | S_IRUGO),
gb_debugfs_get(), es1,
*/
struct greybus_host_device;
+struct svc_msg;
/* Greybus "Host driver" structure, needed by a host controller driver to be
* able to handle both SVC control as well as "real" greybus messages
int (*message_send)(struct greybus_host_device *hd, u16 dest_cport_id,
struct gb_message *message, gfp_t gfp_mask);
void (*message_cancel)(struct gb_message *message);
+ int (*submit_svc)(struct svc_msg *svc_msg,
+ struct greybus_host_device *hd);
};
struct greybus_host_device {
struct gb_endo *endo;
struct gb_connection *initial_svc_connection;
- struct gb_svc *svc;
/* Private data for the host driver */
unsigned long hd_priv[0] __aligned(sizeof(s64));
int greybus_disabled(void);
+int greybus_svc_in(struct greybus_host_device *hd, u8 *data, int length);
+int gb_ap_init(void);
+void gb_ap_exit(void);
void gb_debugfs_init(void);
void gb_debugfs_cleanup(void);
struct dentry *gb_debugfs_get(void);
* CONTROL and SVC protocols for communication between AP and SVC.
*/
#define GB_SVC_BUNDLE_ID 0
-#define GB_SVC_CPORT_ID 0
+#define GB_SVC_CPORT_ID 2
#define GB_CONTROL_BUNDLE_ID 0
-#define GB_CONTROL_CPORT_ID 0
+#define GB_CONTROL_CPORT_ID 2
/* Control Protocol */
#define GB_SVC_TYPE_INTF_RESET 0x06
#define GB_SVC_TYPE_CONN_CREATE 0x07
#define GB_SVC_TYPE_CONN_DESTROY 0x08
-#define GB_SVC_TYPE_ROUTE_CREATE 0x0b
/* SVC version request/response have same payload as gb_protocol_version_response */
__u16 cport1_id;
__u8 intf2_id;
__u16 cport2_id;
- __u8 tc;
- __u8 flags;
};
/* connection create response has no payload */
};
/* connection destroy response has no payload */
-struct gb_svc_route_create_request {
- __u8 intf1_id;
- __u8 dev1_id;
- __u8 intf2_id;
- __u8 dev2_id;
-};
-
/* UART */
/* Version of the Greybus UART protocol we support */
/*
* Tear down a previously set up module.
*/
-static void interface_destroy(struct gb_interface *intf)
+void gb_interface_destroy(struct gb_interface *intf)
{
struct gb_module *module;
struct gb_bundle *bundle;
struct gb_interface *intf = gb_interface_find(hd, interface_id);
if (intf)
- interface_destroy(intf);
+ gb_interface_destroy(intf);
else
dev_err(hd->parent, "interface id %d not found\n",
interface_id);
struct gb_interface *intf, *temp;
list_for_each_entry_safe(intf, temp, &hd->interfaces, links)
- interface_destroy(intf);
+ gb_interface_destroy(intf);
}
#include "greybus.h"
-#define CPORT_FLAGS_E2EFC (1)
-#define CPORT_FLAGS_CSD_N (2)
-#define CPORT_FLAGS_CSV_N (4)
-
struct gb_svc {
struct gb_connection *connection;
u8 version_major;
return connection;
}
+EXPORT_SYMBOL_GPL(gb_ap_svc_connection_create);
/*
* We know endo-type and AP's interface id now, lets create a proper svc
request.cport1_id = cport1_id;
request.intf2_id = intf2_id;
request.cport2_id = cport2_id;
- /*
- * XXX: fix connections paramaters to TC0 and all CPort flags
- * for now.
- */
- request.tc = 0;
- request.flags = CPORT_FLAGS_CSV_N | CPORT_FLAGS_E2EFC;
return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE,
&request, sizeof(request), NULL, 0);
&request, sizeof(request), NULL, 0);
}
-static int route_create_operation(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
- u8 intf2_id, u8 dev2_id)
-{
- struct gb_svc_route_create_request request;
-
- request.intf1_id = intf1_id;
- request.dev1_id = dev1_id;
- request.intf2_id = intf2_id;
- request.dev2_id = dev2_id;
-
- return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE,
- &request, sizeof(request), NULL, 0);
-}
-
int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id)
{
return intf_device_id_operation(svc, intf_id, device_id);
}
EXPORT_SYMBOL_GPL(gb_svc_connection_destroy);
-int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
- u8 intf2_id, u8 dev2_id) {
- return route_create_operation(svc, intf1_id, dev1_id,
- intf2_id, dev2_id);
-}
-EXPORT_SYMBOL_GPL(gb_svc_route_create);
-
static int gb_svc_version_request(struct gb_operation *op)
{
struct gb_connection *connection = op->connection;
goto ida_put;
}
- /*
- * Create a two-way route between the AP and the new interface
- */
- ret = route_create_operation(svc, hd->endo->ap_intf_id,
- GB_DEVICE_ID_AP, intf_id, device_id);
- if (ret) {
- dev_err(dev, "%s: Route create operation failed, interface %hhu device_id %hhu (%d)\n",
- __func__, intf_id, device_id, ret);
- goto ida_put;
- }
-
- ret = route_create_operation(svc, intf_id, device_id,
- hd->endo->ap_intf_id, GB_DEVICE_ID_AP);
- if (ret) {
- dev_err(dev, "%s: Route create operation failed, interface %hhu device_id %hhu (%d)\n",
- __func__, intf_id, device_id, ret);
- goto ida_put;
- }
-
ret = gb_interface_init(intf, device_id);
if (ret) {
dev_err(dev, "%s: Failed to initialize interface, interface %hhu device_id %hhu (%d)\n",
if (!svc)
return -ENOMEM;
- connection->hd->svc = svc;
svc->connection = connection;
connection->private = svc;
{
struct gb_svc *svc = connection->private;
- connection->hd->svc = NULL;
connection->private = NULL;
kfree(svc);
}
--- /dev/null
+/*
+ * Greybus AP <-> SVC message structure format.
+ *
+ * See "Greybus Application Protocol" document (version 0.1) for
+ * details on these values and structures.
+ *
+ * Copyright 2014 Google Inc.
+ * Copyright 2014 Linaro Ltd.
+ *
+ * Released under the GPLv2 and BSD license.
+ */
+
+#ifndef __SVC_MSG_H
+#define __SVC_MSG_H
+
+enum svc_function_id {
+ SVC_FUNCTION_HANDSHAKE = 0x00,
+ SVC_FUNCTION_UNIPRO_NETWORK_MANAGEMENT = 0x01,
+ SVC_FUNCTION_HOTPLUG = 0x02,
+ SVC_FUNCTION_POWER = 0x03,
+ SVC_FUNCTION_EPM = 0x04,
+ SVC_FUNCTION_SUSPEND = 0x05,
+};
+
+enum svc_msg_type {
+ SVC_MSG_DATA = 0x00,
+ SVC_MSG_ERROR = 0xff,
+};
+
+struct svc_msg_header {
+ __u8 function_id; /* enum svc_function_id */
+ __u8 message_type;
+ __le16 payload_length;
+} __packed;
+
+enum svc_function_handshake_type {
+ SVC_HANDSHAKE_SVC_HELLO = 0x00,
+ SVC_HANDSHAKE_AP_HELLO = 0x01,
+ SVC_HANDSHAKE_MODULE_HELLO = 0x02,
+};
+
+struct svc_function_handshake {
+ __u8 version_major;
+ __u8 version_minor;
+ __u8 handshake_type; /* enum svc_function_handshake_type */
+} __packed;
+
+struct svc_function_unipro_set_route {
+ __u8 device_id;
+} __packed;
+
+struct svc_function_unipro_link_up {
+ __u8 interface_id; /* Interface id within the Endo */
+ __u8 device_id;
+} __packed;
+
+struct svc_function_ap_id {
+ __u8 interface_id;
+ __u8 device_id;
+} __packed;
+
+enum svc_function_management_event {
+ SVC_MANAGEMENT_AP_ID = 0x00,
+ SVC_MANAGEMENT_LINK_UP = 0x01,
+ SVC_MANAGEMENT_SET_ROUTE = 0x02,
+};
+
+struct svc_function_unipro_management {
+ __u8 management_packet_type; /* enum svc_function_management_event */
+ union {
+ struct svc_function_ap_id ap_id;
+ struct svc_function_unipro_link_up link_up;
+ struct svc_function_unipro_set_route set_route;
+ };
+} __packed;
+
+enum svc_function_hotplug_event {
+ SVC_HOTPLUG_EVENT = 0x00,
+ SVC_HOTUNPLUG_EVENT = 0x01,
+};
+
+struct svc_function_hotplug {
+ __u8 hotplug_event; /* enum svc_function_hotplug_event */
+ __u8 interface_id; /* Interface id within the Endo */
+} __packed;
+
+enum svc_function_power_type {
+ SVC_POWER_BATTERY_STATUS = 0x00,
+ SVC_POWER_BATTERY_STATUS_REQUEST = 0x01,
+};
+
+enum svc_function_battery_status {
+ SVC_BATTERY_UNKNOWN = 0x00,
+ SVC_BATTERY_CHARGING = 0x01,
+ SVC_BATTERY_DISCHARGING = 0x02,
+ SVC_BATTERY_NOT_CHARGING = 0x03,
+ SVC_BATTERY_FULL = 0x04,
+};
+
+struct svc_function_power_battery_status {
+ __le16 charge_full;
+ __le16 charge_now;
+ __u8 status; /* enum svc_function_battery_status */
+} __packed;
+
+struct svc_function_power_battery_status_request {
+} __packed;
+
+/* XXX
+ * Each interface carries power, so it's possible these things
+ * are associated with each UniPro device and not just the module.
+ * For now it's safe to assume it's per-module.
+ */
+struct svc_function_power {
+ __u8 power_type; /* enum svc_function_power_type */
+ __u8 interface_id;
+ union {
+ struct svc_function_power_battery_status status;
+ struct svc_function_power_battery_status_request request;
+ };
+} __packed;
+
+enum svc_function_epm_command_type {
+ SVC_EPM_ENABLE = 0x00,
+ SVC_EPM_DISABLE = 0x01,
+};
+
+/* EPM's are associated with the module */
+struct svc_function_epm {
+ __u8 epm_command_type; /* enum svc_function_epm_command_type */
+ __u8 module_id;
+} __packed;
+
+enum svc_function_suspend_command_type {
+ SVC_SUSPEND_FIXME_1 = 0x00, // FIXME
+ SVC_SUSPEND_FIXME_2 = 0x01,
+};
+
+/* We'll want independent control for multi-interface modules */
+struct svc_function_suspend {
+ __u8 suspend_command_type; /* enum function_suspend_command_type */
+ __u8 device_id;
+} __packed;
+
+struct svc_msg {
+ struct svc_msg_header header;
+ union {
+ struct svc_function_handshake handshake;
+ struct svc_function_unipro_management management;
+ struct svc_function_hotplug hotplug;
+ struct svc_function_power power;
+ struct svc_function_epm epm;
+ struct svc_function_suspend suspend;
+ };
+} __packed;
+
+#endif /* __SVC_MSG_H */
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff