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path: root/greybus_es2.patch
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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-15 13:54:11 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-15 13:54:11 +0200
commitc1aa01c96e590714d99c5f17cfae1b14dec8bdee (patch)
tree5811422f65efdff3fd89fdaf9a8c6d7d1cc4d06b /greybus_es2.patch
parent4758ee8bc89a86c2110b9e85878538ced8045ef5 (diff)
downloadpatches-c1aa01c96e590714d99c5f17cfae1b14dec8bdee.tar.gz
greybus patches
Diffstat (limited to 'greybus_es2.patch')
-rw-r--r--greybus_es2.patch1604
1 files changed, 1604 insertions, 0 deletions
diff --git a/greybus_es2.patch b/greybus_es2.patch
new file mode 100644
index 00000000000000..348f530ba46d6b
--- /dev/null
+++ b/greybus_es2.patch
@@ -0,0 +1,1604 @@
+---
+ drivers/greybus/es2.c | 1597 ++++++++++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 1597 insertions(+)
+
+--- /dev/null
++++ b/drivers/greybus/es2.c
+@@ -0,0 +1,1597 @@
++/*
++ * Greybus "AP" USB driver for "ES2" controller chips
++ *
++ * Copyright 2014-2015 Google Inc.
++ * Copyright 2014-2015 Linaro Ltd.
++ *
++ * Released under the GPLv2 only.
++ */
++#include <linux/kthread.h>
++#include <linux/sizes.h>
++#include <linux/usb.h>
++#include <linux/kfifo.h>
++#include <linux/debugfs.h>
++#include <linux/list.h>
++#include <asm/unaligned.h>
++
++#include "arpc.h"
++#include "greybus.h"
++#include "greybus_trace.h"
++#include "connection.h"
++
++
++/* Default timeout for USB vendor requests. */
++#define ES2_USB_CTRL_TIMEOUT 500
++
++/* Default timeout for ARPC CPort requests */
++#define ES2_ARPC_CPORT_TIMEOUT 500
++
++/* Fixed CPort numbers */
++#define ES2_CPORT_CDSI0 16
++#define ES2_CPORT_CDSI1 17
++
++/* Memory sizes for the buffers sent to/from the ES2 controller */
++#define ES2_GBUF_MSG_SIZE_MAX 2048
++
++/* Memory sizes for the ARPC buffers */
++#define ARPC_OUT_SIZE_MAX U16_MAX
++#define ARPC_IN_SIZE_MAX 128
++
++static const struct usb_device_id id_table[] = {
++ { USB_DEVICE(0x18d1, 0x1eaf) },
++ { },
++};
++MODULE_DEVICE_TABLE(usb, id_table);
++
++#define APB1_LOG_SIZE SZ_16K
++
++/*
++ * Number of CPort IN urbs in flight at any point in time.
++ * Adjust if we are having stalls in the USB buffer due to not enough urbs in
++ * flight.
++ */
++#define NUM_CPORT_IN_URB 4
++
++/* Number of CPort OUT urbs in flight at any point in time.
++ * Adjust if we get messages saying we are out of urbs in the system log.
++ */
++#define NUM_CPORT_OUT_URB 8
++
++/*
++ * Number of ARPC in urbs in flight at any point in time.
++ */
++#define NUM_ARPC_IN_URB 2
++
++/*
++ * @endpoint: bulk in endpoint for CPort data
++ * @urb: array of urbs for the CPort in messages
++ * @buffer: array of buffers for the @cport_in_urb urbs
++ */
++struct es2_cport_in {
++ __u8 endpoint;
++ struct urb *urb[NUM_CPORT_IN_URB];
++ u8 *buffer[NUM_CPORT_IN_URB];
++};
++
++/**
++ * es2_ap_dev - ES2 USB Bridge to AP structure
++ * @usb_dev: pointer to the USB device we are.
++ * @usb_intf: pointer to the USB interface we are bound to.
++ * @hd: pointer to our gb_host_device structure
++
++ * @cport_in: endpoint, urbs and buffer for cport in messages
++ * @cport_out_endpoint: endpoint for for cport out messages
++ * @cport_out_urb: array of urbs for the CPort out messages
++ * @cport_out_urb_busy: array of flags to see if the @cport_out_urb is busy or
++ * not.
++ * @cport_out_urb_cancelled: array of flags indicating whether the
++ * corresponding @cport_out_urb is being cancelled
++ * @cport_out_urb_lock: locks the @cport_out_urb_busy "list"
++ *
++ * @apb_log_task: task pointer for logging thread
++ * @apb_log_dentry: file system entry for the log file interface
++ * @apb_log_enable_dentry: file system entry for enabling logging
++ * @apb_log_fifo: kernel FIFO to carry logged data
++ * @arpc_urb: array of urbs for the ARPC in messages
++ * @arpc_buffer: array of buffers for the @arpc_urb urbs
++ * @arpc_endpoint_in: bulk in endpoint for APBridgeA RPC
++ * @arpc_id_cycle: gives an unique id to ARPC
++ * @arpc_lock: locks ARPC list
++ * @arpcs: list of in progress ARPCs
++ */
++struct es2_ap_dev {
++ struct usb_device *usb_dev;
++ struct usb_interface *usb_intf;
++ struct gb_host_device *hd;
++
++ struct es2_cport_in cport_in;
++ __u8 cport_out_endpoint;
++ struct urb *cport_out_urb[NUM_CPORT_OUT_URB];
++ bool cport_out_urb_busy[NUM_CPORT_OUT_URB];
++ bool cport_out_urb_cancelled[NUM_CPORT_OUT_URB];
++ spinlock_t cport_out_urb_lock;
++
++ bool cdsi1_in_use;
++
++ struct task_struct *apb_log_task;
++ struct dentry *apb_log_dentry;
++ struct dentry *apb_log_enable_dentry;
++ DECLARE_KFIFO(apb_log_fifo, char, APB1_LOG_SIZE);
++
++ __u8 arpc_endpoint_in;
++ struct urb *arpc_urb[NUM_ARPC_IN_URB];
++ u8 *arpc_buffer[NUM_ARPC_IN_URB];
++
++ int arpc_id_cycle;
++ spinlock_t arpc_lock;
++ struct list_head arpcs;
++};
++
++/**
++ * timesync_enable_request - Enable timesync in an APBridge
++ * @count: number of TimeSync Pulses to expect
++ * @frame_time: the initial FrameTime at the first TimeSync Pulse
++ * @strobe_delay: the expected delay in microseconds between each TimeSync Pulse
++ * @refclk: The AP mandated reference clock to run FrameTime at
++ */
++struct timesync_enable_request {
++ __u8 count;
++ __le64 frame_time;
++ __le32 strobe_delay;
++ __le32 refclk;
++} __packed;
++
++/**
++ * timesync_authoritative_request - Transmit authoritative FrameTime to APBridge
++ * @frame_time: An array of authoritative FrameTimes provided by the SVC
++ * and relayed to the APBridge by the AP
++ */
++struct timesync_authoritative_request {
++ __le64 frame_time[GB_TIMESYNC_MAX_STROBES];
++} __packed;
++
++struct arpc {
++ struct list_head list;
++ struct arpc_request_message *req;
++ struct arpc_response_message *resp;
++ struct completion response_received;
++ bool active;
++};
++
++static inline struct es2_ap_dev *hd_to_es2(struct gb_host_device *hd)
++{
++ return (struct es2_ap_dev *)&hd->hd_priv;
++}
++
++static void cport_out_callback(struct urb *urb);
++static void usb_log_enable(struct es2_ap_dev *es2);
++static void usb_log_disable(struct es2_ap_dev *es2);
++static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload,
++ size_t size, int *result, unsigned int timeout);
++
++static int output_sync(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd)
++{
++ struct usb_device *udev = es2->usb_dev;
++ u8 *data;
++ int retval;
++
++ data = kmalloc(size, GFP_KERNEL);
++ if (!data)
++ return -ENOMEM;
++ memcpy(data, req, size);
++
++ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ cmd,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE,
++ 0, 0, data, size, ES2_USB_CTRL_TIMEOUT);
++ if (retval < 0)
++ dev_err(&udev->dev, "%s: return error %d\n", __func__, retval);
++ else
++ retval = 0;
++
++ kfree(data);
++ return retval;
++}
++
++static void ap_urb_complete(struct urb *urb)
++{
++ struct usb_ctrlrequest *dr = urb->context;
++
++ kfree(dr);
++ usb_free_urb(urb);
++}
++
++static int output_async(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd)
++{
++ struct usb_device *udev = es2->usb_dev;
++ struct urb *urb;
++ struct usb_ctrlrequest *dr;
++ u8 *buf;
++ int retval;
++
++ urb = usb_alloc_urb(0, GFP_ATOMIC);
++ if (!urb)
++ return -ENOMEM;
++
++ dr = kmalloc(sizeof(*dr) + size, GFP_ATOMIC);
++ if (!dr) {
++ usb_free_urb(urb);
++ return -ENOMEM;
++ }
++
++ buf = (u8 *)dr + sizeof(*dr);
++ memcpy(buf, req, size);
++
++ dr->bRequest = cmd;
++ dr->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE;
++ dr->wValue = 0;
++ dr->wIndex = 0;
++ dr->wLength = cpu_to_le16(size);
++
++ usb_fill_control_urb(urb, udev, usb_sndctrlpipe(udev, 0),
++ (unsigned char *)dr, buf, size,
++ ap_urb_complete, dr);
++ retval = usb_submit_urb(urb, GFP_ATOMIC);
++ if (retval) {
++ usb_free_urb(urb);
++ kfree(dr);
++ }
++ return retval;
++}
++
++static int output(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
++ bool async)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++
++ if (async)
++ return output_async(es2, req, size, cmd);
++
++ return output_sync(es2, req, size, cmd);
++}
++
++static int es2_cport_in_enable(struct es2_ap_dev *es2,
++ struct es2_cport_in *cport_in)
++{
++ struct urb *urb;
++ int ret;
++ int i;
++
++ for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
++ urb = cport_in->urb[i];
++
++ ret = usb_submit_urb(urb, GFP_KERNEL);
++ if (ret) {
++ dev_err(&es2->usb_dev->dev,
++ "failed to submit in-urb: %d\n", ret);
++ goto err_kill_urbs;
++ }
++ }
++
++ return 0;
++
++err_kill_urbs:
++ for (--i; i >= 0; --i) {
++ urb = cport_in->urb[i];
++ usb_kill_urb(urb);
++ }
++
++ return ret;
++}
++
++static void es2_cport_in_disable(struct es2_ap_dev *es2,
++ struct es2_cport_in *cport_in)
++{
++ struct urb *urb;
++ int i;
++
++ for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
++ urb = cport_in->urb[i];
++ usb_kill_urb(urb);
++ }
++}
++
++static int es2_arpc_in_enable(struct es2_ap_dev *es2)
++{
++ struct urb *urb;
++ int ret;
++ int i;
++
++ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
++ urb = es2->arpc_urb[i];
++
++ ret = usb_submit_urb(urb, GFP_KERNEL);
++ if (ret) {
++ dev_err(&es2->usb_dev->dev,
++ "failed to submit arpc in-urb: %d\n", ret);
++ goto err_kill_urbs;
++ }
++ }
++
++ return 0;
++
++err_kill_urbs:
++ for (--i; i >= 0; --i) {
++ urb = es2->arpc_urb[i];
++ usb_kill_urb(urb);
++ }
++
++ return ret;
++}
++
++static void es2_arpc_in_disable(struct es2_ap_dev *es2)
++{
++ struct urb *urb;
++ int i;
++
++ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
++ urb = es2->arpc_urb[i];
++ usb_kill_urb(urb);
++ }
++}
++
++static struct urb *next_free_urb(struct es2_ap_dev *es2, gfp_t gfp_mask)
++{
++ struct urb *urb = NULL;
++ unsigned long flags;
++ int i;
++
++ spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
++
++ /* Look in our pool of allocated urbs first, as that's the "fastest" */
++ for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
++ if (es2->cport_out_urb_busy[i] == false &&
++ es2->cport_out_urb_cancelled[i] == false) {
++ es2->cport_out_urb_busy[i] = true;
++ urb = es2->cport_out_urb[i];
++ break;
++ }
++ }
++ spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
++ if (urb)
++ return urb;
++
++ /*
++ * Crap, pool is empty, complain to the syslog and go allocate one
++ * dynamically as we have to succeed.
++ */
++ dev_dbg(&es2->usb_dev->dev,
++ "No free CPort OUT urbs, having to dynamically allocate one!\n");
++ return usb_alloc_urb(0, gfp_mask);
++}
++
++static void free_urb(struct es2_ap_dev *es2, struct urb *urb)
++{
++ unsigned long flags;
++ int i;
++ /*
++ * See if this was an urb in our pool, if so mark it "free", otherwise
++ * we need to free it ourselves.
++ */
++ spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
++ for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
++ if (urb == es2->cport_out_urb[i]) {
++ es2->cport_out_urb_busy[i] = false;
++ urb = NULL;
++ break;
++ }
++ }
++ spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
++
++ /* If urb is not NULL, then we need to free this urb */
++ usb_free_urb(urb);
++}
++
++/*
++ * We (ab)use the operation-message header pad bytes to transfer the
++ * cport id in order to minimise overhead.
++ */
++static void
++gb_message_cport_pack(struct gb_operation_msg_hdr *header, u16 cport_id)
++{
++ header->pad[0] = cport_id;
++}
++
++/* Clear the pad bytes used for the CPort id */
++static void gb_message_cport_clear(struct gb_operation_msg_hdr *header)
++{
++ header->pad[0] = 0;
++}
++
++/* Extract the CPort id packed into the header, and clear it */
++static u16 gb_message_cport_unpack(struct gb_operation_msg_hdr *header)
++{
++ u16 cport_id = header->pad[0];
++
++ gb_message_cport_clear(header);
++
++ return cport_id;
++}
++
++/*
++ * Returns zero if the message was successfully queued, or a negative errno
++ * otherwise.
++ */
++static int message_send(struct gb_host_device *hd, u16 cport_id,
++ struct gb_message *message, gfp_t gfp_mask)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++ size_t buffer_size;
++ int retval;
++ struct urb *urb;
++ unsigned long flags;
++
++ /*
++ * The data actually transferred will include an indication
++ * of where the data should be sent. Do one last check of
++ * the target CPort id before filling it in.
++ */
++ if (!cport_id_valid(hd, cport_id)) {
++ dev_err(&udev->dev, "invalid cport %u\n", cport_id);
++ return -EINVAL;
++ }
++
++ /* Find a free urb */
++ urb = next_free_urb(es2, gfp_mask);
++ if (!urb)
++ return -ENOMEM;
++
++ spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
++ message->hcpriv = urb;
++ spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
++
++ /* Pack the cport id into the message header */
++ gb_message_cport_pack(message->header, cport_id);
++
++ buffer_size = sizeof(*message->header) + message->payload_size;
++
++ usb_fill_bulk_urb(urb, udev,
++ usb_sndbulkpipe(udev,
++ es2->cport_out_endpoint),
++ message->buffer, buffer_size,
++ cport_out_callback, message);
++ urb->transfer_flags |= URB_ZERO_PACKET;
++
++ trace_gb_message_submit(message);
++
++ retval = usb_submit_urb(urb, gfp_mask);
++ if (retval) {
++ dev_err(&udev->dev, "failed to submit out-urb: %d\n", retval);
++
++ spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
++ message->hcpriv = NULL;
++ spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
++
++ free_urb(es2, urb);
++ gb_message_cport_clear(message->header);
++
++ return retval;
++ }
++
++ return 0;
++}
++
++/*
++ * Can not be called in atomic context.
++ */
++static void message_cancel(struct gb_message *message)
++{
++ struct gb_host_device *hd = message->operation->connection->hd;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct urb *urb;
++ int i;
++
++ might_sleep();
++
++ spin_lock_irq(&es2->cport_out_urb_lock);
++ urb = message->hcpriv;
++
++ /* Prevent dynamically allocated urb from being deallocated. */
++ usb_get_urb(urb);
++
++ /* Prevent pre-allocated urb from being reused. */
++ for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
++ if (urb == es2->cport_out_urb[i]) {
++ es2->cport_out_urb_cancelled[i] = true;
++ break;
++ }
++ }
++ spin_unlock_irq(&es2->cport_out_urb_lock);
++
++ usb_kill_urb(urb);
++
++ if (i < NUM_CPORT_OUT_URB) {
++ spin_lock_irq(&es2->cport_out_urb_lock);
++ es2->cport_out_urb_cancelled[i] = false;
++ spin_unlock_irq(&es2->cport_out_urb_lock);
++ }
++
++ usb_free_urb(urb);
++}
++
++static int es2_cport_allocate(struct gb_host_device *hd, int cport_id,
++ unsigned long flags)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct ida *id_map = &hd->cport_id_map;
++ int ida_start, ida_end;
++
++ switch (cport_id) {
++ case ES2_CPORT_CDSI0:
++ case ES2_CPORT_CDSI1:
++ dev_err(&hd->dev, "cport %d not available\n", cport_id);
++ return -EBUSY;
++ }
++
++ if (flags & GB_CONNECTION_FLAG_OFFLOADED &&
++ flags & GB_CONNECTION_FLAG_CDSI1) {
++ if (es2->cdsi1_in_use) {
++ dev_err(&hd->dev, "CDSI1 already in use\n");
++ return -EBUSY;
++ }
++
++ es2->cdsi1_in_use = true;
++
++ return ES2_CPORT_CDSI1;
++ }
++
++ if (cport_id < 0) {
++ ida_start = 0;
++ ida_end = hd->num_cports;
++ } else if (cport_id < hd->num_cports) {
++ ida_start = cport_id;
++ ida_end = cport_id + 1;
++ } else {
++ dev_err(&hd->dev, "cport %d not available\n", cport_id);
++ return -EINVAL;
++ }
++
++ return ida_simple_get(id_map, ida_start, ida_end, GFP_KERNEL);
++}
++
++static void es2_cport_release(struct gb_host_device *hd, u16 cport_id)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++
++ switch (cport_id) {
++ case ES2_CPORT_CDSI1:
++ es2->cdsi1_in_use = false;
++ return;
++ }
++
++ ida_simple_remove(&hd->cport_id_map, cport_id);
++}
++
++static int cport_enable(struct gb_host_device *hd, u16 cport_id,
++ unsigned long flags)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++ struct gb_apb_request_cport_flags *req;
++ u32 connection_flags;
++ int ret;
++
++ req = kzalloc(sizeof(*req), GFP_KERNEL);
++ if (!req)
++ return -ENOMEM;
++
++ connection_flags = 0;
++ if (flags & GB_CONNECTION_FLAG_CONTROL)
++ connection_flags |= GB_APB_CPORT_FLAG_CONTROL;
++ if (flags & GB_CONNECTION_FLAG_HIGH_PRIO)
++ connection_flags |= GB_APB_CPORT_FLAG_HIGH_PRIO;
++
++ req->flags = cpu_to_le32(connection_flags);
++
++ dev_dbg(&hd->dev, "%s - cport = %u, flags = %02x\n", __func__,
++ cport_id, connection_flags);
++
++ ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ GB_APB_REQUEST_CPORT_FLAGS,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, cport_id, 0,
++ req, sizeof(*req), ES2_USB_CTRL_TIMEOUT);
++ if (ret != sizeof(*req)) {
++ dev_err(&udev->dev, "failed to set cport flags for port %d\n",
++ cport_id);
++ if (ret >= 0)
++ ret = -EIO;
++
++ goto out;
++ }
++
++ ret = 0;
++out:
++ kfree(req);
++
++ return ret;
++}
++
++static int es2_cport_connected(struct gb_host_device *hd, u16 cport_id)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct device *dev = &es2->usb_dev->dev;
++ struct arpc_cport_connected_req req;
++ int ret;
++
++ req.cport_id = cpu_to_le16(cport_id);
++ ret = arpc_sync(es2, ARPC_TYPE_CPORT_CONNECTED, &req, sizeof(req),
++ NULL, ES2_ARPC_CPORT_TIMEOUT);
++ if (ret) {
++ dev_err(dev, "failed to set connected state for cport %u: %d\n",
++ cport_id, ret);
++ return ret;
++ }
++
++ return 0;
++}
++
++static int es2_cport_flush(struct gb_host_device *hd, u16 cport_id)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct device *dev = &es2->usb_dev->dev;
++ struct arpc_cport_flush_req req;
++ int ret;
++
++ req.cport_id = cpu_to_le16(cport_id);
++ ret = arpc_sync(es2, ARPC_TYPE_CPORT_FLUSH, &req, sizeof(req),
++ NULL, ES2_ARPC_CPORT_TIMEOUT);
++ if (ret) {
++ dev_err(dev, "failed to flush cport %u: %d\n", cport_id, ret);
++ return ret;
++ }
++
++ return 0;
++}
++
++static int es2_cport_shutdown(struct gb_host_device *hd, u16 cport_id,
++ u8 phase, unsigned int timeout)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct device *dev = &es2->usb_dev->dev;
++ struct arpc_cport_shutdown_req req;
++ int result;
++ int ret;
++
++ if (timeout > U16_MAX)
++ return -EINVAL;
++
++ req.cport_id = cpu_to_le16(cport_id);
++ req.timeout = cpu_to_le16(timeout);
++ req.phase = phase;
++ ret = arpc_sync(es2, ARPC_TYPE_CPORT_SHUTDOWN, &req, sizeof(req),
++ &result, ES2_ARPC_CPORT_TIMEOUT + timeout);
++ if (ret) {
++ dev_err(dev, "failed to send shutdown over cport %u: %d (%d)\n",
++ cport_id, ret, result);
++ return ret;
++ }
++
++ return 0;
++}
++
++static int es2_cport_quiesce(struct gb_host_device *hd, u16 cport_id,
++ size_t peer_space, unsigned int timeout)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct device *dev = &es2->usb_dev->dev;
++ struct arpc_cport_quiesce_req req;
++ int result;
++ int ret;
++
++ if (peer_space > U16_MAX)
++ return -EINVAL;
++
++ if (timeout > U16_MAX)
++ return -EINVAL;
++
++ req.cport_id = cpu_to_le16(cport_id);
++ req.peer_space = cpu_to_le16(peer_space);
++ req.timeout = cpu_to_le16(timeout);
++ ret = arpc_sync(es2, ARPC_TYPE_CPORT_QUIESCE, &req, sizeof(req),
++ &result, ES2_ARPC_CPORT_TIMEOUT + timeout);
++ if (ret) {
++ dev_err(dev, "failed to quiesce cport %u: %d (%d)\n",
++ cport_id, ret, result);
++ return ret;
++ }
++
++ return 0;
++}
++
++static int es2_cport_clear(struct gb_host_device *hd, u16 cport_id)
++{
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct device *dev = &es2->usb_dev->dev;
++ struct arpc_cport_clear_req req;
++ int ret;
++
++ req.cport_id = cpu_to_le16(cport_id);
++ ret = arpc_sync(es2, ARPC_TYPE_CPORT_CLEAR, &req, sizeof(req),
++ NULL, ES2_ARPC_CPORT_TIMEOUT);
++ if (ret) {
++ dev_err(dev, "failed to clear cport %u: %d\n", cport_id, ret);
++ return ret;
++ }
++
++ return 0;
++}
++
++static int latency_tag_enable(struct gb_host_device *hd, u16 cport_id)
++{
++ int retval;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++
++ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ GB_APB_REQUEST_LATENCY_TAG_EN,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, cport_id, 0, NULL,
++ 0, ES2_USB_CTRL_TIMEOUT);
++
++ if (retval < 0)
++ dev_err(&udev->dev, "Cannot enable latency tag for cport %d\n",
++ cport_id);
++ return retval;
++}
++
++static int latency_tag_disable(struct gb_host_device *hd, u16 cport_id)
++{
++ int retval;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++
++ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ GB_APB_REQUEST_LATENCY_TAG_DIS,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, cport_id, 0, NULL,
++ 0, ES2_USB_CTRL_TIMEOUT);
++
++ if (retval < 0)
++ dev_err(&udev->dev, "Cannot disable latency tag for cport %d\n",
++ cport_id);
++ return retval;
++}
++
++static int timesync_enable(struct gb_host_device *hd, u8 count,
++ u64 frame_time, u32 strobe_delay, u32 refclk)
++{
++ int retval;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++ struct gb_control_timesync_enable_request *request;
++
++ request = kzalloc(sizeof(*request), GFP_KERNEL);
++ if (!request)
++ return -ENOMEM;
++
++ request->count = count;
++ request->frame_time = cpu_to_le64(frame_time);
++ request->strobe_delay = cpu_to_le32(strobe_delay);
++ request->refclk = cpu_to_le32(refclk);
++ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ GB_APB_REQUEST_TIMESYNC_ENABLE,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, 0, 0, request,
++ sizeof(*request), ES2_USB_CTRL_TIMEOUT);
++ if (retval < 0)
++ dev_err(&udev->dev, "Cannot enable timesync %d\n", retval);
++
++ kfree(request);
++ return retval;
++}
++
++static int timesync_disable(struct gb_host_device *hd)
++{
++ int retval;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++
++ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ GB_APB_REQUEST_TIMESYNC_DISABLE,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, 0, 0, NULL,
++ 0, ES2_USB_CTRL_TIMEOUT);
++ if (retval < 0)
++ dev_err(&udev->dev, "Cannot disable timesync %d\n", retval);
++
++ return retval;
++}
++
++static int timesync_authoritative(struct gb_host_device *hd, u64 *frame_time)
++{
++ int retval, i;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++ struct timesync_authoritative_request *request;
++
++ request = kzalloc(sizeof(*request), GFP_KERNEL);
++ if (!request)
++ return -ENOMEM;
++
++ for (i = 0; i < GB_TIMESYNC_MAX_STROBES; i++)
++ request->frame_time[i] = cpu_to_le64(frame_time[i]);
++
++ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ GB_APB_REQUEST_TIMESYNC_AUTHORITATIVE,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, 0, 0, request,
++ sizeof(*request), ES2_USB_CTRL_TIMEOUT);
++ if (retval < 0)
++ dev_err(&udev->dev, "Cannot timesync authoritative out %d\n", retval);
++
++ kfree(request);
++ return retval;
++}
++
++static int timesync_get_last_event(struct gb_host_device *hd, u64 *frame_time)
++{
++ int retval;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ struct usb_device *udev = es2->usb_dev;
++ __le64 *response_frame_time;
++
++ response_frame_time = kzalloc(sizeof(*response_frame_time), GFP_KERNEL);
++ if (!response_frame_time)
++ return -ENOMEM;
++
++ retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
++ GB_APB_REQUEST_TIMESYNC_GET_LAST_EVENT,
++ USB_DIR_IN | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, 0, 0, response_frame_time,
++ sizeof(*response_frame_time),
++ ES2_USB_CTRL_TIMEOUT);
++
++ if (retval != sizeof(*response_frame_time)) {
++ dev_err(&udev->dev, "Cannot get last TimeSync event: %d\n",
++ retval);
++
++ if (retval >= 0)
++ retval = -EIO;
++
++ goto out;
++ }
++ *frame_time = le64_to_cpu(*response_frame_time);
++ retval = 0;
++out:
++ kfree(response_frame_time);
++ return retval;
++}
++
++static struct gb_hd_driver es2_driver = {
++ .hd_priv_size = sizeof(struct es2_ap_dev),
++ .message_send = message_send,
++ .message_cancel = message_cancel,
++ .cport_allocate = es2_cport_allocate,
++ .cport_release = es2_cport_release,
++ .cport_enable = cport_enable,
++ .cport_connected = es2_cport_connected,
++ .cport_flush = es2_cport_flush,
++ .cport_shutdown = es2_cport_shutdown,
++ .cport_quiesce = es2_cport_quiesce,
++ .cport_clear = es2_cport_clear,
++ .latency_tag_enable = latency_tag_enable,
++ .latency_tag_disable = latency_tag_disable,
++ .output = output,
++ .timesync_enable = timesync_enable,
++ .timesync_disable = timesync_disable,
++ .timesync_authoritative = timesync_authoritative,
++ .timesync_get_last_event = timesync_get_last_event,
++};
++
++/* Common function to report consistent warnings based on URB status */
++static int check_urb_status(struct urb *urb)
++{
++ struct device *dev = &urb->dev->dev;
++ int status = urb->status;
++
++ switch (status) {
++ case 0:
++ return 0;
++
++ case -EOVERFLOW:
++ dev_err(dev, "%s: overflow actual length is %d\n",
++ __func__, urb->actual_length);
++ case -ECONNRESET:
++ case -ENOENT:
++ case -ESHUTDOWN:
++ case -EILSEQ:
++ case -EPROTO:
++ /* device is gone, stop sending */
++ return status;
++ }
++ dev_err(dev, "%s: unknown status %d\n", __func__, status);
++
++ return -EAGAIN;
++}
++
++static void es2_destroy(struct es2_ap_dev *es2)
++{
++ struct usb_device *udev;
++ struct urb *urb;
++ int i;
++
++ debugfs_remove(es2->apb_log_enable_dentry);
++ usb_log_disable(es2);
++
++ /* Tear down everything! */
++ for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
++ urb = es2->cport_out_urb[i];
++ usb_kill_urb(urb);
++ usb_free_urb(urb);
++ es2->cport_out_urb[i] = NULL;
++ es2->cport_out_urb_busy[i] = false; /* just to be anal */
++ }
++
++ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
++ usb_free_urb(es2->arpc_urb[i]);
++ kfree(es2->arpc_buffer[i]);
++ es2->arpc_buffer[i] = NULL;
++ }
++
++ for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
++ usb_free_urb(es2->cport_in.urb[i]);
++ kfree(es2->cport_in.buffer[i]);
++ es2->cport_in.buffer[i] = NULL;
++ }
++
++ /* release reserved CDSI0 and CDSI1 cports */
++ gb_hd_cport_release_reserved(es2->hd, ES2_CPORT_CDSI1);
++ gb_hd_cport_release_reserved(es2->hd, ES2_CPORT_CDSI0);
++
++ udev = es2->usb_dev;
++ gb_hd_put(es2->hd);
++
++ usb_put_dev(udev);
++}
++
++static void cport_in_callback(struct urb *urb)
++{
++ struct gb_host_device *hd = urb->context;
++ struct device *dev = &urb->dev->dev;
++ struct gb_operation_msg_hdr *header;
++ int status = check_urb_status(urb);
++ int retval;
++ u16 cport_id;
++
++ if (status) {
++ if ((status == -EAGAIN) || (status == -EPROTO))
++ goto exit;
++
++ /* The urb is being unlinked */
++ if (status == -ENOENT || status == -ESHUTDOWN)
++ return;
++
++ dev_err(dev, "urb cport in error %d (dropped)\n", status);
++ return;
++ }
++
++ if (urb->actual_length < sizeof(*header)) {
++ dev_err(dev, "short message received\n");
++ goto exit;
++ }
++
++ /* Extract the CPort id, which is packed in the message header */
++ header = urb->transfer_buffer;
++ cport_id = gb_message_cport_unpack(header);
++
++ if (cport_id_valid(hd, cport_id)) {
++ greybus_data_rcvd(hd, cport_id, urb->transfer_buffer,
++ urb->actual_length);
++ } else {
++ dev_err(dev, "invalid cport id %u received\n", cport_id);
++ }
++exit:
++ /* put our urb back in the request pool */
++ retval = usb_submit_urb(urb, GFP_ATOMIC);
++ if (retval)
++ dev_err(dev, "failed to resubmit in-urb: %d\n", retval);
++}
++
++static void cport_out_callback(struct urb *urb)
++{
++ struct gb_message *message = urb->context;
++ struct gb_host_device *hd = message->operation->connection->hd;
++ struct es2_ap_dev *es2 = hd_to_es2(hd);
++ int status = check_urb_status(urb);
++ unsigned long flags;
++
++ gb_message_cport_clear(message->header);
++
++ spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
++ message->hcpriv = NULL;
++ spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
++
++ /*
++ * Tell the submitter that the message send (attempt) is
++ * complete, and report the status.
++ */
++ greybus_message_sent(hd, message, status);
++
++ free_urb(es2, urb);
++}
++
++static struct arpc *arpc_alloc(void *payload, u16 size, u8 type)
++{
++ struct arpc *rpc;
++
++ if (size + sizeof(*rpc->req) > ARPC_OUT_SIZE_MAX)
++ return NULL;
++
++ rpc = kzalloc(sizeof(*rpc), GFP_KERNEL);
++ if (!rpc)
++ return NULL;
++
++ INIT_LIST_HEAD(&rpc->list);
++ rpc->req = kzalloc(sizeof(*rpc->req) + size, GFP_KERNEL);
++ if (!rpc->req)
++ goto err_free_rpc;
++
++ rpc->resp = kzalloc(sizeof(*rpc->resp), GFP_KERNEL);
++ if (!rpc->resp)
++ goto err_free_req;
++
++ rpc->req->type = type;
++ rpc->req->size = cpu_to_le16(sizeof(rpc->req) + size);
++ memcpy(rpc->req->data, payload, size);
++
++ init_completion(&rpc->response_received);
++
++ return rpc;
++
++err_free_req:
++ kfree(rpc->req);
++err_free_rpc:
++ kfree(rpc);
++
++ return NULL;
++}
++
++static void arpc_free(struct arpc *rpc)
++{
++ kfree(rpc->req);
++ kfree(rpc->resp);
++ kfree(rpc);
++}
++
++static struct arpc *arpc_find(struct es2_ap_dev *es2, __le16 id)
++{
++ struct arpc *rpc;
++
++ list_for_each_entry(rpc, &es2->arpcs, list) {
++ if (rpc->req->id == id)
++ return rpc;
++ }
++
++ return NULL;
++}
++
++static void arpc_add(struct es2_ap_dev *es2, struct arpc *rpc)
++{
++ rpc->active = true;
++ rpc->req->id = cpu_to_le16(es2->arpc_id_cycle++);
++ list_add_tail(&rpc->list, &es2->arpcs);
++}
++
++static void arpc_del(struct es2_ap_dev *es2, struct arpc *rpc)
++{
++ if (rpc->active) {
++ rpc->active = false;
++ list_del(&rpc->list);
++ }
++}
++
++static int arpc_send(struct es2_ap_dev *es2, struct arpc *rpc, int timeout)
++{
++ struct usb_device *udev = es2->usb_dev;
++ int retval;
++
++ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
++ GB_APB_REQUEST_ARPC_RUN,
++ USB_DIR_OUT | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE,
++ 0, 0,
++ rpc->req, le16_to_cpu(rpc->req->size),
++ ES2_USB_CTRL_TIMEOUT);
++ if (retval != le16_to_cpu(rpc->req->size)) {
++ dev_err(&udev->dev,
++ "failed to send ARPC request %d: %d\n",
++ rpc->req->type, retval);
++ if (retval > 0)
++ retval = -EIO;
++ return retval;
++ }
++
++ return 0;
++}
++
++static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload,
++ size_t size, int *result, unsigned int timeout)
++{
++ struct arpc *rpc;
++ unsigned long flags;
++ int retval;
++
++ if (result)
++ *result = 0;
++
++ rpc = arpc_alloc(payload, size, type);
++ if (!rpc)
++ return -ENOMEM;
++
++ spin_lock_irqsave(&es2->arpc_lock, flags);
++ arpc_add(es2, rpc);
++ spin_unlock_irqrestore(&es2->arpc_lock, flags);
++
++ retval = arpc_send(es2, rpc, timeout);
++ if (retval)
++ goto out_arpc_del;
++
++ retval = wait_for_completion_interruptible_timeout(
++ &rpc->response_received,
++ msecs_to_jiffies(timeout));
++ if (retval <= 0) {
++ if (!retval)
++ retval = -ETIMEDOUT;
++ goto out_arpc_del;
++ }
++
++ if (rpc->resp->result) {
++ retval = -EREMOTEIO;
++ if (result)
++ *result = rpc->resp->result;
++ } else {
++ retval = 0;
++ }
++
++out_arpc_del:
++ spin_lock_irqsave(&es2->arpc_lock, flags);
++ arpc_del(es2, rpc);
++ spin_unlock_irqrestore(&es2->arpc_lock, flags);
++ arpc_free(rpc);
++
++ if (retval < 0 && retval != -EREMOTEIO) {
++ dev_err(&es2->usb_dev->dev,
++ "failed to execute ARPC: %d\n", retval);
++ }
++
++ return retval;
++}
++
++static void arpc_in_callback(struct urb *urb)
++{
++ struct es2_ap_dev *es2 = urb->context;
++ struct device *dev = &urb->dev->dev;
++ int status = check_urb_status(urb);
++ struct arpc *rpc;
++ struct arpc_response_message *resp;
++ unsigned long flags;
++ int retval;
++
++ if (status) {
++ if ((status == -EAGAIN) || (status == -EPROTO))
++ goto exit;
++
++ /* The urb is being unlinked */
++ if (status == -ENOENT || status == -ESHUTDOWN)
++ return;
++
++ dev_err(dev, "arpc in-urb error %d (dropped)\n", status);
++ return;
++ }
++
++ if (urb->actual_length < sizeof(*resp)) {
++ dev_err(dev, "short aprc response received\n");
++ goto exit;
++ }
++
++ resp = urb->transfer_buffer;
++ spin_lock_irqsave(&es2->arpc_lock, flags);
++ rpc = arpc_find(es2, resp->id);
++ if (!rpc) {
++ dev_err(dev, "invalid arpc response id received: %u\n",
++ le16_to_cpu(resp->id));
++ spin_unlock_irqrestore(&es2->arpc_lock, flags);
++ goto exit;
++ }
++
++ arpc_del(es2, rpc);
++ memcpy(rpc->resp, resp, sizeof(*resp));
++ complete(&rpc->response_received);
++ spin_unlock_irqrestore(&es2->arpc_lock, flags);
++
++exit:
++ /* put our urb back in the request pool */
++ retval = usb_submit_urb(urb, GFP_ATOMIC);
++ if (retval)
++ dev_err(dev, "failed to resubmit arpc in-urb: %d\n", retval);
++}
++
++#define APB1_LOG_MSG_SIZE 64
++static void apb_log_get(struct es2_ap_dev *es2, char *buf)
++{
++ int retval;
++
++ do {
++ retval = usb_control_msg(es2->usb_dev,
++ usb_rcvctrlpipe(es2->usb_dev, 0),
++ GB_APB_REQUEST_LOG,
++ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
++ 0x00, 0x00,
++ buf,
++ APB1_LOG_MSG_SIZE,
++ ES2_USB_CTRL_TIMEOUT);
++ if (retval > 0)
++ kfifo_in(&es2->apb_log_fifo, buf, retval);
++ } while (retval > 0);
++}
++
++static int apb_log_poll(void *data)
++{
++ struct es2_ap_dev *es2 = data;
++ char *buf;
++
++ buf = kmalloc(APB1_LOG_MSG_SIZE, GFP_KERNEL);
++ if (!buf)
++ return -ENOMEM;
++
++ while (!kthread_should_stop()) {
++ msleep(1000);
++ apb_log_get(es2, buf);
++ }
++
++ kfree(buf);
++
++ return 0;
++}
++
++static ssize_t apb_log_read(struct file *f, char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ struct es2_ap_dev *es2 = f->f_inode->i_private;
++ ssize_t ret;
++ size_t copied;
++ char *tmp_buf;
++
++ if (count > APB1_LOG_SIZE)
++ count = APB1_LOG_SIZE;
++
++ tmp_buf = kmalloc(count, GFP_KERNEL);
++ if (!tmp_buf)
++ return -ENOMEM;
++
++ copied = kfifo_out(&es2->apb_log_fifo, tmp_buf, count);
++ ret = simple_read_from_buffer(buf, count, ppos, tmp_buf, copied);
++
++ kfree(tmp_buf);
++
++ return ret;
++}
++
++static const struct file_operations apb_log_fops = {
++ .read = apb_log_read,
++};
++
++static void usb_log_enable(struct es2_ap_dev *es2)
++{
++ if (!IS_ERR_OR_NULL(es2->apb_log_task))
++ return;
++
++ /* get log from APB1 */
++ es2->apb_log_task = kthread_run(apb_log_poll, es2, "apb_log");
++ if (IS_ERR(es2->apb_log_task))
++ return;
++ /* XXX We will need to rename this per APB */
++ es2->apb_log_dentry = debugfs_create_file("apb_log", S_IRUGO,
++ gb_debugfs_get(), es2,
++ &apb_log_fops);
++}
++
++static void usb_log_disable(struct es2_ap_dev *es2)
++{
++ if (IS_ERR_OR_NULL(es2->apb_log_task))
++ return;
++
++ debugfs_remove(es2->apb_log_dentry);
++ es2->apb_log_dentry = NULL;
++
++ kthread_stop(es2->apb_log_task);
++ es2->apb_log_task = NULL;
++}
++
++static ssize_t apb_log_enable_read(struct file *f, char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ struct es2_ap_dev *es2 = f->f_inode->i_private;
++ int enable = !IS_ERR_OR_NULL(es2->apb_log_task);
++ char tmp_buf[3];
++
++ sprintf(tmp_buf, "%d\n", enable);
++ return simple_read_from_buffer(buf, count, ppos, tmp_buf, 3);
++}
++
++static ssize_t apb_log_enable_write(struct file *f, const char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ int enable;
++ ssize_t retval;
++ struct es2_ap_dev *es2 = f->f_inode->i_private;
++
++ retval = kstrtoint_from_user(buf, count, 10, &enable);
++ if (retval)
++ return retval;
++
++ if (enable)
++ usb_log_enable(es2);
++ else
++ usb_log_disable(es2);
++
++ return count;
++}
++
++static const struct file_operations apb_log_enable_fops = {
++ .read = apb_log_enable_read,
++ .write = apb_log_enable_write,
++};
++
++static int apb_get_cport_count(struct usb_device *udev)
++{
++ int retval;
++ __le16 *cport_count;
++
++ cport_count = kzalloc(sizeof(*cport_count), GFP_KERNEL);
++ if (!cport_count)
++ return -ENOMEM;
++
++ retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
++ GB_APB_REQUEST_CPORT_COUNT,
++ USB_DIR_IN | USB_TYPE_VENDOR |
++ USB_RECIP_INTERFACE, 0, 0, cport_count,
++ sizeof(*cport_count), ES2_USB_CTRL_TIMEOUT);
++ if (retval != sizeof(*cport_count)) {
++ dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n",
++ retval);
++
++ if (retval >= 0)
++ retval = -EIO;
++
++ goto out;
++ }
++
++ retval = le16_to_cpu(*cport_count);
++
++ /* We need to fit a CPort ID in one byte of a message header */
++ if (retval > U8_MAX) {
++ retval = U8_MAX;
++ dev_warn(&udev->dev, "Limiting number of CPorts to U8_MAX\n");
++ }
++
++out:
++ kfree(cport_count);
++ return retval;
++}
++
++/*
++ * The ES2 USB Bridge device has 15 endpoints
++ * 1 Control - usual USB stuff + AP -> APBridgeA messages
++ * 7 Bulk IN - CPort data in
++ * 7 Bulk OUT - CPort data out
++ */
++static int ap_probe(struct usb_interface *interface,
++ const struct usb_device_id *id)
++{
++ struct es2_ap_dev *es2;
++ struct gb_host_device *hd;
++ struct usb_device *udev;
++ struct usb_host_interface *iface_desc;
++ struct usb_endpoint_descriptor *endpoint;
++ __u8 ep_addr;
++ int retval;
++ int i;
++ int num_cports;
++ bool bulk_out_found = false;
++ bool bulk_in_found = false;
++ bool arpc_in_found = false;
++
++ udev = usb_get_dev(interface_to_usbdev(interface));
++
++ num_cports = apb_get_cport_count(udev);
++ if (num_cports < 0) {
++ usb_put_dev(udev);
++ dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n",
++ num_cports);
++ return num_cports;
++ }
++
++ hd = gb_hd_create(&es2_driver, &udev->dev, ES2_GBUF_MSG_SIZE_MAX,
++ num_cports);
++ if (IS_ERR(hd)) {
++ usb_put_dev(udev);
++ return PTR_ERR(hd);
++ }
++
++ es2 = hd_to_es2(hd);
++ es2->hd = hd;
++ es2->usb_intf = interface;
++ es2->usb_dev = udev;
++ spin_lock_init(&es2->cport_out_urb_lock);
++ INIT_KFIFO(es2->apb_log_fifo);
++ usb_set_intfdata(interface, es2);
++
++ /*
++ * Reserve the CDSI0 and CDSI1 CPorts so they won't be allocated
++ * dynamically.
++ */
++ retval = gb_hd_cport_reserve(hd, ES2_CPORT_CDSI0);
++ if (retval)
++ goto error;
++ retval = gb_hd_cport_reserve(hd, ES2_CPORT_CDSI1);
++ if (retval)
++ goto error;
++
++ /* find all bulk endpoints */
++ iface_desc = interface->cur_altsetting;
++ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
++ endpoint = &iface_desc->endpoint[i].desc;
++ ep_addr = endpoint->bEndpointAddress;
++
++ if (usb_endpoint_is_bulk_in(endpoint)) {
++ if (!bulk_in_found) {
++ es2->cport_in.endpoint = ep_addr;
++ bulk_in_found = true;
++ } else if (!arpc_in_found) {
++ es2->arpc_endpoint_in = ep_addr;
++ arpc_in_found = true;
++ } else {
++ dev_warn(&udev->dev,
++ "Unused bulk IN endpoint found: 0x%02x\n",
++ ep_addr);
++ }
++ continue;
++ }
++ if (usb_endpoint_is_bulk_out(endpoint)) {
++ if (!bulk_out_found) {
++ es2->cport_out_endpoint = ep_addr;
++ bulk_out_found = true;
++ } else {
++ dev_warn(&udev->dev,
++ "Unused bulk OUT endpoint found: 0x%02x\n",
++ ep_addr);
++ }
++ continue;
++ }
++ dev_warn(&udev->dev,
++ "Unknown endpoint type found, address 0x%02x\n",
++ ep_addr);
++ }
++ if (!bulk_in_found || !arpc_in_found || !bulk_out_found) {
++ dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n");
++ retval = -ENODEV;
++ goto error;
++ }
++
++ /* Allocate buffers for our cport in messages */
++ for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
++ struct urb *urb;
++ u8 *buffer;
++
++ urb = usb_alloc_urb(0, GFP_KERNEL);
++ if (!urb) {
++ retval = -ENOMEM;
++ goto error;
++ }
++ es2->cport_in.urb[i] = urb;
++
++ buffer = kmalloc(ES2_GBUF_MSG_SIZE_MAX, GFP_KERNEL);
++ if (!buffer) {
++ retval = -ENOMEM;
++ goto error;
++ }
++
++ usb_fill_bulk_urb(urb, udev,
++ usb_rcvbulkpipe(udev, es2->cport_in.endpoint),
++ buffer, ES2_GBUF_MSG_SIZE_MAX,
++ cport_in_callback, hd);
++
++ es2->cport_in.buffer[i] = buffer;
++ }
++
++ /* Allocate buffers for ARPC in messages */
++ for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
++ struct urb *urb;
++ u8 *buffer;
++
++ urb = usb_alloc_urb(0, GFP_KERNEL);
++ if (!urb) {
++ retval = -ENOMEM;
++ goto error;
++ }
++ es2->arpc_urb[i] = urb;
++
++ buffer = kmalloc(ARPC_IN_SIZE_MAX, GFP_KERNEL);
++ if (!buffer) {
++ retval = -ENOMEM;
++ goto error;
++ }
++
++ usb_fill_bulk_urb(urb, udev,
++ usb_rcvbulkpipe(udev,
++ es2->arpc_endpoint_in),
++ buffer, ARPC_IN_SIZE_MAX,
++ arpc_in_callback, es2);
++
++ es2->arpc_buffer[i] = buffer;
++ }
++
++ /* Allocate urbs for our CPort OUT messages */
++ for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
++ struct urb *urb;
++
++ urb = usb_alloc_urb(0, GFP_KERNEL);
++ if (!urb) {
++ retval = -ENOMEM;
++ goto error;
++ }
++
++ es2->cport_out_urb[i] = urb;
++ es2->cport_out_urb_busy[i] = false; /* just to be anal */
++ }
++
++ /* XXX We will need to rename this per APB */
++ es2->apb_log_enable_dentry = debugfs_create_file("apb_log_enable",
++ (S_IWUSR | S_IRUGO),
++ gb_debugfs_get(), es2,
++ &apb_log_enable_fops);
++
++ INIT_LIST_HEAD(&es2->arpcs);
++ spin_lock_init(&es2->arpc_lock);
++
++ if (es2_arpc_in_enable(es2))
++ goto error;
++
++ retval = gb_hd_add(hd);
++ if (retval)
++ goto err_disable_arpc_in;
++
++ retval = es2_cport_in_enable(es2, &es2->cport_in);
++ if (retval)
++ goto err_hd_del;
++
++ return 0;
++
++err_hd_del:
++ gb_hd_del(hd);
++err_disable_arpc_in:
++ es2_arpc_in_disable(es2);
++error:
++ es2_destroy(es2);
++
++ return retval;
++}
++
++static void ap_disconnect(struct usb_interface *interface)
++{
++ struct es2_ap_dev *es2 = usb_get_intfdata(interface);
++
++ gb_hd_del(es2->hd);
++
++ es2_cport_in_disable(es2, &es2->cport_in);
++ es2_arpc_in_disable(es2);
++
++ es2_destroy(es2);
++}
++
++static struct usb_driver es2_ap_driver = {
++ .name = "es2_ap_driver",
++ .probe = ap_probe,
++ .disconnect = ap_disconnect,
++ .id_table = id_table,
++ .soft_unbind = 1,
++};
++
++module_usb_driver(es2_ap_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
generated by cgit 1.2.3-korg (git 2.43.0) at 2026-03-01 19:03:01 +0000