1461 lines
33 KiB
C
1461 lines
33 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Greybus "AP" USB driver for "ES2" controller chips
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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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#include <linux/kthread.h>
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#include <linux/sizes.h>
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#include <linux/usb.h>
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#include <linux/kfifo.h>
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#include <linux/debugfs.h>
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#include <linux/list.h>
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#include <linux/greybus.h>
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#include <asm/unaligned.h>
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#include "arpc.h"
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#include "greybus_trace.h"
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/* Default timeout for USB vendor requests. */
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#define ES2_USB_CTRL_TIMEOUT 500
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/* Default timeout for ARPC CPort requests */
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#define ES2_ARPC_CPORT_TIMEOUT 500
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/* Fixed CPort numbers */
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#define ES2_CPORT_CDSI0 16
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#define ES2_CPORT_CDSI1 17
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/* Memory sizes for the buffers sent to/from the ES2 controller */
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#define ES2_GBUF_MSG_SIZE_MAX 2048
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/* Memory sizes for the ARPC buffers */
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#define ARPC_OUT_SIZE_MAX U16_MAX
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#define ARPC_IN_SIZE_MAX 128
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(0x18d1, 0x1eaf) },
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{ },
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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#define APB1_LOG_SIZE SZ_16K
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/*
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* Number of CPort IN urbs in flight at any point in time.
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* Adjust if we are having stalls in the USB buffer due to not enough urbs in
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* flight.
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*/
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#define NUM_CPORT_IN_URB 4
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/* Number of CPort OUT urbs in flight at any point in time.
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* Adjust if we get messages saying we are out of urbs in the system log.
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*/
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#define NUM_CPORT_OUT_URB 8
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/*
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* Number of ARPC in urbs in flight at any point in time.
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*/
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#define NUM_ARPC_IN_URB 2
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/*
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* @endpoint: bulk in endpoint for CPort data
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* @urb: array of urbs for the CPort in messages
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* @buffer: array of buffers for the @cport_in_urb urbs
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*/
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struct es2_cport_in {
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__u8 endpoint;
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struct urb *urb[NUM_CPORT_IN_URB];
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u8 *buffer[NUM_CPORT_IN_URB];
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};
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/**
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* struct es2_ap_dev - ES2 USB Bridge to AP structure
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* @usb_dev: pointer to the USB device we are.
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* @usb_intf: pointer to the USB interface we are bound to.
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* @hd: pointer to our gb_host_device structure
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*
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* @cport_in: endpoint, urbs and buffer for cport in messages
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* @cport_out_endpoint: endpoint for cport out messages
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* @cport_out_urb: array of urbs for the CPort out messages
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* @cport_out_urb_busy: array of flags to see if the @cport_out_urb is busy or
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* not.
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* @cport_out_urb_cancelled: array of flags indicating whether the
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* corresponding @cport_out_urb is being cancelled
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* @cport_out_urb_lock: locks the @cport_out_urb_busy "list"
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* @cdsi1_in_use: true if cport CDSI1 is in use
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* @apb_log_task: task pointer for logging thread
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* @apb_log_dentry: file system entry for the log file interface
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* @apb_log_enable_dentry: file system entry for enabling logging
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* @apb_log_fifo: kernel FIFO to carry logged data
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* @arpc_urb: array of urbs for the ARPC in messages
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* @arpc_buffer: array of buffers for the @arpc_urb urbs
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* @arpc_endpoint_in: bulk in endpoint for APBridgeA RPC
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* @arpc_id_cycle: gives an unique id to ARPC
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* @arpc_lock: locks ARPC list
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* @arpcs: list of in progress ARPCs
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*/
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struct es2_ap_dev {
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struct usb_device *usb_dev;
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struct usb_interface *usb_intf;
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struct gb_host_device *hd;
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struct es2_cport_in cport_in;
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__u8 cport_out_endpoint;
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struct urb *cport_out_urb[NUM_CPORT_OUT_URB];
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bool cport_out_urb_busy[NUM_CPORT_OUT_URB];
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bool cport_out_urb_cancelled[NUM_CPORT_OUT_URB];
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spinlock_t cport_out_urb_lock;
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bool cdsi1_in_use;
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struct task_struct *apb_log_task;
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struct dentry *apb_log_dentry;
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struct dentry *apb_log_enable_dentry;
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DECLARE_KFIFO(apb_log_fifo, char, APB1_LOG_SIZE);
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__u8 arpc_endpoint_in;
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struct urb *arpc_urb[NUM_ARPC_IN_URB];
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u8 *arpc_buffer[NUM_ARPC_IN_URB];
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int arpc_id_cycle;
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spinlock_t arpc_lock;
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struct list_head arpcs;
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};
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struct arpc {
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struct list_head list;
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struct arpc_request_message *req;
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struct arpc_response_message *resp;
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struct completion response_received;
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bool active;
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};
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static inline struct es2_ap_dev *hd_to_es2(struct gb_host_device *hd)
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{
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return (struct es2_ap_dev *)&hd->hd_priv;
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}
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static void cport_out_callback(struct urb *urb);
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static void usb_log_enable(struct es2_ap_dev *es2);
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static void usb_log_disable(struct es2_ap_dev *es2);
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static int arpc_sync(struct es2_ap_dev *es2, u8 type, void *payload,
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size_t size, int *result, unsigned int timeout);
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static int output_sync(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd)
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{
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struct usb_device *udev = es2->usb_dev;
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u8 *data;
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int retval;
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data = kmemdup(req, size, GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
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cmd,
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USB_DIR_OUT | USB_TYPE_VENDOR |
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USB_RECIP_INTERFACE,
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0, 0, data, size, ES2_USB_CTRL_TIMEOUT);
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if (retval < 0)
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dev_err(&udev->dev, "%s: return error %d\n", __func__, retval);
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else
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retval = 0;
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kfree(data);
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return retval;
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}
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static void ap_urb_complete(struct urb *urb)
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{
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struct usb_ctrlrequest *dr = urb->context;
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kfree(dr);
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usb_free_urb(urb);
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}
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static int output_async(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd)
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{
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struct usb_device *udev = es2->usb_dev;
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struct urb *urb;
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struct usb_ctrlrequest *dr;
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u8 *buf;
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int retval;
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb)
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return -ENOMEM;
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dr = kmalloc(sizeof(*dr) + size, GFP_ATOMIC);
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if (!dr) {
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usb_free_urb(urb);
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return -ENOMEM;
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}
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buf = (u8 *)dr + sizeof(*dr);
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memcpy(buf, req, size);
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dr->bRequest = cmd;
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dr->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE;
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dr->wValue = 0;
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dr->wIndex = 0;
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dr->wLength = cpu_to_le16(size);
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usb_fill_control_urb(urb, udev, usb_sndctrlpipe(udev, 0),
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(unsigned char *)dr, buf, size,
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ap_urb_complete, dr);
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retval = usb_submit_urb(urb, GFP_ATOMIC);
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if (retval) {
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usb_free_urb(urb);
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kfree(dr);
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}
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return retval;
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}
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static int output(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
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bool async)
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{
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struct es2_ap_dev *es2 = hd_to_es2(hd);
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if (async)
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return output_async(es2, req, size, cmd);
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return output_sync(es2, req, size, cmd);
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}
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static int es2_cport_in_enable(struct es2_ap_dev *es2,
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struct es2_cport_in *cport_in)
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{
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struct urb *urb;
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int ret;
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int i;
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for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
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urb = cport_in->urb[i];
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ret = usb_submit_urb(urb, GFP_KERNEL);
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if (ret) {
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dev_err(&es2->usb_dev->dev,
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"failed to submit in-urb: %d\n", ret);
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goto err_kill_urbs;
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}
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}
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return 0;
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err_kill_urbs:
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for (--i; i >= 0; --i) {
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urb = cport_in->urb[i];
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usb_kill_urb(urb);
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}
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return ret;
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}
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static void es2_cport_in_disable(struct es2_ap_dev *es2,
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struct es2_cport_in *cport_in)
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{
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struct urb *urb;
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int i;
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for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
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urb = cport_in->urb[i];
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usb_kill_urb(urb);
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}
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}
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static int es2_arpc_in_enable(struct es2_ap_dev *es2)
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{
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struct urb *urb;
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int ret;
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int i;
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for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
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urb = es2->arpc_urb[i];
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ret = usb_submit_urb(urb, GFP_KERNEL);
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if (ret) {
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dev_err(&es2->usb_dev->dev,
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"failed to submit arpc in-urb: %d\n", ret);
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goto err_kill_urbs;
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}
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}
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return 0;
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err_kill_urbs:
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for (--i; i >= 0; --i) {
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urb = es2->arpc_urb[i];
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usb_kill_urb(urb);
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}
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return ret;
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}
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static void es2_arpc_in_disable(struct es2_ap_dev *es2)
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{
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struct urb *urb;
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int i;
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for (i = 0; i < NUM_ARPC_IN_URB; ++i) {
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urb = es2->arpc_urb[i];
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usb_kill_urb(urb);
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}
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}
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static struct urb *next_free_urb(struct es2_ap_dev *es2, gfp_t gfp_mask)
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{
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struct urb *urb = NULL;
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unsigned long flags;
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int i;
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spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
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/* Look in our pool of allocated urbs first, as that's the "fastest" */
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for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
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if (!es2->cport_out_urb_busy[i] &&
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!es2->cport_out_urb_cancelled[i]) {
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es2->cport_out_urb_busy[i] = true;
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urb = es2->cport_out_urb[i];
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break;
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}
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}
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spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
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if (urb)
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return urb;
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/*
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* Crap, pool is empty, complain to the syslog and go allocate one
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* dynamically as we have to succeed.
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*/
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dev_dbg(&es2->usb_dev->dev,
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"No free CPort OUT urbs, having to dynamically allocate one!\n");
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return usb_alloc_urb(0, gfp_mask);
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}
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static void free_urb(struct es2_ap_dev *es2, struct urb *urb)
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{
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unsigned long flags;
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int i;
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/*
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* See if this was an urb in our pool, if so mark it "free", otherwise
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* we need to free it ourselves.
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*/
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spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
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for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
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if (urb == es2->cport_out_urb[i]) {
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es2->cport_out_urb_busy[i] = false;
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urb = NULL;
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break;
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}
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}
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spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
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/* If urb is not NULL, then we need to free this urb */
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usb_free_urb(urb);
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}
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/*
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* We (ab)use the operation-message header pad bytes to transfer the
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* cport id in order to minimise overhead.
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*/
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static void
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gb_message_cport_pack(struct gb_operation_msg_hdr *header, u16 cport_id)
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{
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header->pad[0] = cport_id;
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}
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/* Clear the pad bytes used for the CPort id */
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static void gb_message_cport_clear(struct gb_operation_msg_hdr *header)
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{
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header->pad[0] = 0;
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}
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/* Extract the CPort id packed into the header, and clear it */
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static u16 gb_message_cport_unpack(struct gb_operation_msg_hdr *header)
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{
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u16 cport_id = header->pad[0];
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gb_message_cport_clear(header);
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return cport_id;
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}
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/*
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* Returns zero if the message was successfully queued, or a negative errno
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* otherwise.
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*/
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static int message_send(struct gb_host_device *hd, u16 cport_id,
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struct gb_message *message, gfp_t gfp_mask)
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{
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struct es2_ap_dev *es2 = hd_to_es2(hd);
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struct usb_device *udev = es2->usb_dev;
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size_t buffer_size;
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int retval;
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struct urb *urb;
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unsigned long flags;
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/*
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* The data actually transferred will include an indication
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* of where the data should be sent. Do one last check of
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* the target CPort id before filling it in.
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*/
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if (!cport_id_valid(hd, cport_id)) {
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dev_err(&udev->dev, "invalid cport %u\n", cport_id);
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return -EINVAL;
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}
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/* Find a free urb */
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urb = next_free_urb(es2, gfp_mask);
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if (!urb)
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return -ENOMEM;
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spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
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message->hcpriv = urb;
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spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
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/* Pack the cport id into the message header */
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gb_message_cport_pack(message->header, cport_id);
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buffer_size = sizeof(*message->header) + message->payload_size;
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usb_fill_bulk_urb(urb, udev,
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usb_sndbulkpipe(udev,
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es2->cport_out_endpoint),
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message->buffer, buffer_size,
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cport_out_callback, message);
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urb->transfer_flags |= URB_ZERO_PACKET;
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trace_gb_message_submit(message);
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retval = usb_submit_urb(urb, gfp_mask);
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if (retval) {
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dev_err(&udev->dev, "failed to submit out-urb: %d\n", retval);
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spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
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message->hcpriv = NULL;
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spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
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free_urb(es2, urb);
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gb_message_cport_clear(message->header);
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return retval;
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}
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return 0;
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}
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/*
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* Can not be called in atomic context.
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*/
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static void message_cancel(struct gb_message *message)
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{
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struct gb_host_device *hd = message->operation->connection->hd;
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struct es2_ap_dev *es2 = hd_to_es2(hd);
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struct urb *urb;
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int i;
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might_sleep();
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spin_lock_irq(&es2->cport_out_urb_lock);
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urb = message->hcpriv;
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/* Prevent dynamically allocated urb from being deallocated. */
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usb_get_urb(urb);
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/* Prevent pre-allocated urb from being reused. */
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for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
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if (urb == es2->cport_out_urb[i]) {
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es2->cport_out_urb_cancelled[i] = true;
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break;
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}
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}
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spin_unlock_irq(&es2->cport_out_urb_lock);
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usb_kill_urb(urb);
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if (i < NUM_CPORT_OUT_URB) {
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spin_lock_irq(&es2->cport_out_urb_lock);
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es2->cport_out_urb_cancelled[i] = false;
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spin_unlock_irq(&es2->cport_out_urb_lock);
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}
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usb_free_urb(urb);
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}
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static int es2_cport_allocate(struct gb_host_device *hd, int cport_id,
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unsigned long flags)
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{
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struct es2_ap_dev *es2 = hd_to_es2(hd);
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struct ida *id_map = &hd->cport_id_map;
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int ida_start, ida_end;
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switch (cport_id) {
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case ES2_CPORT_CDSI0:
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case ES2_CPORT_CDSI1:
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dev_err(&hd->dev, "cport %d not available\n", cport_id);
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return -EBUSY;
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}
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if (flags & GB_CONNECTION_FLAG_OFFLOADED &&
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flags & GB_CONNECTION_FLAG_CDSI1) {
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if (es2->cdsi1_in_use) {
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dev_err(&hd->dev, "CDSI1 already in use\n");
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return -EBUSY;
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}
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|
es2->cdsi1_in_use = true;
|
|
|
|
return ES2_CPORT_CDSI1;
|
|
}
|
|
|
|
if (cport_id < 0) {
|
|
ida_start = 0;
|
|
ida_end = hd->num_cports - 1;
|
|
} else if (cport_id < hd->num_cports) {
|
|
ida_start = cport_id;
|
|
ida_end = cport_id;
|
|
} else {
|
|
dev_err(&hd->dev, "cport %d not available\n", cport_id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return ida_alloc_range(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_free(&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 < 0) {
|
|
dev_err(&udev->dev, "failed to set cport flags for port %d\n",
|
|
cport_id);
|
|
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 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,
|
|
};
|
|
|
|
/* 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);
|
|
fallthrough;
|
|
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 < 0) {
|
|
dev_err(&udev->dev,
|
|
"failed to send ARPC request %d: %d\n",
|
|
rpc->req->type, retval);
|
|
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 = file_inode(f)->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", 0444,
|
|
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 = file_inode(f)->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, 2);
|
|
}
|
|
|
|
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 = file_inode(f)->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",
|
|
0644,
|
|
gb_debugfs_get(), es2,
|
|
&apb_log_enable_fops);
|
|
|
|
INIT_LIST_HEAD(&es2->arpcs);
|
|
spin_lock_init(&es2->arpc_lock);
|
|
|
|
retval = es2_arpc_in_enable(es2);
|
|
if (retval)
|
|
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>");
|