![Greg Kroah-Hartman](/assets/img/avatar_default.png)
The kernel already has a debug allocator, no need to have one unique to a single driver. So delete it, replace with kfree, kmalloc, and, in a few places that need it, kzalloc(). Cc: Chris Kelly <ckelly@ozmodevices.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2257 lines
66 KiB
C
2257 lines
66 KiB
C
/* -----------------------------------------------------------------------------
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* Copyright (c) 2011 Ozmo Inc
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* Released under the GNU General Public License Version 2 (GPLv2).
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*
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* This file provides the implementation of a USB host controller device that
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* does not have any associated hardware. Instead the virtual device is
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* connected to the WiFi network and emulates the operation of a USB hcd by
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* receiving and sending network frames.
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* Note:
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* We take great pains to reduce the amount of code where interrupts need to be
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* disabled and in this respect we are different from standard HCD's. In
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* particular we don't want in_irq() code bleeding over to the protocol side of
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* the driver.
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* The troublesome functions are the urb enqueue and dequeue functions both of
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* which can be called in_irq(). So for these functions we put the urbs into a
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* queue and request a tasklet to process them. This means that a spinlock with
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* interrupts disabled must be held for insertion and removal but most code is
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* is in tasklet or soft irq context. The lock that protects this list is called
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* the tasklet lock and serves the purpose of the 'HCD lock' which must be held
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* when calling the following functions.
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* usb_hcd_link_urb_to_ep()
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* usb_hcd_unlink_urb_from_ep()
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* usb_hcd_flush_endpoint()
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* usb_hcd_check_unlink_urb()
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* -----------------------------------------------------------------------------
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*/
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#include <linux/platform_device.h>
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#include <linux/usb.h>
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#include <linux/jiffies.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include "linux/usb/hcd.h"
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#include <asm/unaligned.h>
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#include "ozconfig.h"
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#include "ozusbif.h"
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#include "oztrace.h"
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#include "ozurbparanoia.h"
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#include "ozevent.h"
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/*------------------------------------------------------------------------------
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* Number of units of buffering to capture for an isochronous IN endpoint before
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* allowing data to be indicated up.
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*/
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#define OZ_IN_BUFFERING_UNITS 50
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/* Name of our platform device.
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*/
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#define OZ_PLAT_DEV_NAME "ozwpan"
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/* Maximum number of free urb links that can be kept in the pool.
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*/
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#define OZ_MAX_LINK_POOL_SIZE 16
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/* Get endpoint object from the containing link.
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*/
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#define ep_from_link(__e) container_of((__e), struct oz_endpoint, link)
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/*------------------------------------------------------------------------------
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* Used to link urbs together and also store some status information for each
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* urb.
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* A cache of these are kept in a pool to reduce number of calls to kmalloc.
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*/
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struct oz_urb_link {
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struct list_head link;
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struct urb *urb;
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struct oz_port *port;
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u8 req_id;
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u8 ep_num;
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unsigned long submit_jiffies;
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};
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/* Holds state information about a USB endpoint.
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*/
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struct oz_endpoint {
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struct list_head urb_list; /* List of oz_urb_link items. */
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struct list_head link; /* For isoc ep, links in to isoc
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lists of oz_port. */
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unsigned long last_jiffies;
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int credit;
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int credit_ceiling;
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u8 ep_num;
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u8 attrib;
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u8 *buffer;
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int buffer_size;
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int in_ix;
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int out_ix;
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int buffered_units;
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unsigned flags;
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int start_frame;
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};
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/* Bits in the flags field. */
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#define OZ_F_EP_BUFFERING 0x1
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#define OZ_F_EP_HAVE_STREAM 0x2
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/* Holds state information about a USB interface.
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*/
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struct oz_interface {
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unsigned ep_mask;
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u8 alt;
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};
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/* Holds state information about an hcd port.
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*/
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#define OZ_NB_ENDPOINTS 16
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struct oz_port {
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unsigned flags;
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unsigned status;
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void *hpd;
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struct oz_hcd *ozhcd;
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spinlock_t port_lock;
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u8 bus_addr;
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u8 next_req_id;
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u8 config_num;
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int num_iface;
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struct oz_interface *iface;
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struct oz_endpoint *out_ep[OZ_NB_ENDPOINTS];
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struct oz_endpoint *in_ep[OZ_NB_ENDPOINTS];
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struct list_head isoc_out_ep;
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struct list_head isoc_in_ep;
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};
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#define OZ_PORT_F_PRESENT 0x1
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#define OZ_PORT_F_CHANGED 0x2
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#define OZ_PORT_F_DYING 0x4
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/* Data structure in the private context area of struct usb_hcd.
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*/
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#define OZ_NB_PORTS 8
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struct oz_hcd {
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spinlock_t hcd_lock;
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struct list_head urb_pending_list;
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struct list_head urb_cancel_list;
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struct list_head orphanage;
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int conn_port; /* Port that is currently connecting, -1 if none.*/
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struct oz_port ports[OZ_NB_PORTS];
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uint flags;
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struct usb_hcd *hcd;
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};
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/* Bits in flags field.
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*/
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#define OZ_HDC_F_SUSPENDED 0x1
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/*------------------------------------------------------------------------------
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* Static function prototypes.
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*/
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static int oz_hcd_start(struct usb_hcd *hcd);
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static void oz_hcd_stop(struct usb_hcd *hcd);
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static void oz_hcd_shutdown(struct usb_hcd *hcd);
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static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
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gfp_t mem_flags);
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static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
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static void oz_hcd_endpoint_disable(struct usb_hcd *hcd,
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struct usb_host_endpoint *ep);
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static void oz_hcd_endpoint_reset(struct usb_hcd *hcd,
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struct usb_host_endpoint *ep);
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static int oz_hcd_get_frame_number(struct usb_hcd *hcd);
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static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf);
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static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue,
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u16 windex, char *buf, u16 wlength);
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static int oz_hcd_bus_suspend(struct usb_hcd *hcd);
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static int oz_hcd_bus_resume(struct usb_hcd *hcd);
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static int oz_plat_probe(struct platform_device *dev);
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static int oz_plat_remove(struct platform_device *dev);
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static void oz_plat_shutdown(struct platform_device *dev);
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static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg);
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static int oz_plat_resume(struct platform_device *dev);
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static void oz_urb_process_tasklet(unsigned long unused);
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static int oz_build_endpoints_for_config(struct usb_hcd *hcd,
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struct oz_port *port, struct usb_host_config *config,
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gfp_t mem_flags);
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static void oz_clean_endpoints_for_config(struct usb_hcd *hcd,
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struct oz_port *port);
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static int oz_build_endpoints_for_interface(struct usb_hcd *hcd,
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struct oz_port *port,
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struct usb_host_interface *intf, gfp_t mem_flags);
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static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd,
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struct oz_port *port, int if_ix);
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static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
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gfp_t mem_flags);
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static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep,
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struct urb *urb);
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static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status);
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/*------------------------------------------------------------------------------
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* Static external variables.
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*/
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static struct platform_device *g_plat_dev;
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static struct oz_hcd *g_ozhcd;
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static DEFINE_SPINLOCK(g_hcdlock); /* Guards g_ozhcd. */
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static const char g_hcd_name[] = "Ozmo WPAN";
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static struct list_head *g_link_pool;
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static int g_link_pool_size;
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static DEFINE_SPINLOCK(g_link_lock);
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static DEFINE_SPINLOCK(g_tasklet_lock);
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static struct tasklet_struct g_urb_process_tasklet;
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static struct tasklet_struct g_urb_cancel_tasklet;
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static atomic_t g_pending_urbs = ATOMIC_INIT(0);
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static const struct hc_driver g_oz_hc_drv = {
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.description = g_hcd_name,
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.product_desc = "Ozmo Devices WPAN",
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.hcd_priv_size = sizeof(struct oz_hcd),
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.flags = HCD_USB11,
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.start = oz_hcd_start,
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.stop = oz_hcd_stop,
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.shutdown = oz_hcd_shutdown,
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.urb_enqueue = oz_hcd_urb_enqueue,
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.urb_dequeue = oz_hcd_urb_dequeue,
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.endpoint_disable = oz_hcd_endpoint_disable,
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.endpoint_reset = oz_hcd_endpoint_reset,
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.get_frame_number = oz_hcd_get_frame_number,
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.hub_status_data = oz_hcd_hub_status_data,
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.hub_control = oz_hcd_hub_control,
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.bus_suspend = oz_hcd_bus_suspend,
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.bus_resume = oz_hcd_bus_resume,
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};
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static struct platform_driver g_oz_plat_drv = {
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.probe = oz_plat_probe,
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.remove = oz_plat_remove,
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.shutdown = oz_plat_shutdown,
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.suspend = oz_plat_suspend,
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.resume = oz_plat_resume,
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.driver = {
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.name = OZ_PLAT_DEV_NAME,
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.owner = THIS_MODULE,
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},
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};
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/*------------------------------------------------------------------------------
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* Gets our private context area (which is of type struct oz_hcd) from the
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* usb_hcd structure.
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* Context: any
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*/
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static inline struct oz_hcd *oz_hcd_private(struct usb_hcd *hcd)
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{
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return (struct oz_hcd *)hcd->hcd_priv;
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}
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/*------------------------------------------------------------------------------
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* Searches list of ports to find the index of the one with a specified USB
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* bus address. If none of the ports has the bus address then the connection
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* port is returned, if there is one or -1 otherwise.
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* Context: any
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*/
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static int oz_get_port_from_addr(struct oz_hcd *ozhcd, u8 bus_addr)
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{
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int i;
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for (i = 0; i < OZ_NB_PORTS; i++) {
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if (ozhcd->ports[i].bus_addr == bus_addr)
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return i;
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}
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return ozhcd->conn_port;
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}
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/*------------------------------------------------------------------------------
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* Allocates an urb link, first trying the pool but going to heap if empty.
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* Context: any
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*/
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static struct oz_urb_link *oz_alloc_urb_link(void)
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{
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struct oz_urb_link *urbl = 0;
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unsigned long irq_state;
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spin_lock_irqsave(&g_link_lock, irq_state);
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if (g_link_pool) {
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urbl = container_of(g_link_pool, struct oz_urb_link, link);
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g_link_pool = urbl->link.next;
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--g_link_pool_size;
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}
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spin_unlock_irqrestore(&g_link_lock, irq_state);
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if (urbl == 0)
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urbl = kmalloc(sizeof(struct oz_urb_link), GFP_ATOMIC);
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return urbl;
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}
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/*------------------------------------------------------------------------------
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* Frees an urb link by putting it in the pool if there is enough space or
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* deallocating it to heap otherwise.
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* Context: any
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*/
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static void oz_free_urb_link(struct oz_urb_link *urbl)
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{
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if (urbl) {
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unsigned long irq_state;
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spin_lock_irqsave(&g_link_lock, irq_state);
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if (g_link_pool_size < OZ_MAX_LINK_POOL_SIZE) {
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urbl->link.next = g_link_pool;
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g_link_pool = &urbl->link;
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urbl = 0;
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g_link_pool_size++;
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}
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spin_unlock_irqrestore(&g_link_lock, irq_state);
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if (urbl)
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kfree(urbl);
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}
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}
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/*------------------------------------------------------------------------------
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* Deallocates all the urb links in the pool.
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* Context: unknown
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*/
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static void oz_empty_link_pool(void)
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{
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struct list_head *e;
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unsigned long irq_state;
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spin_lock_irqsave(&g_link_lock, irq_state);
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e = g_link_pool;
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g_link_pool = 0;
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g_link_pool_size = 0;
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spin_unlock_irqrestore(&g_link_lock, irq_state);
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while (e) {
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struct oz_urb_link *urbl =
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container_of(e, struct oz_urb_link, link);
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e = e->next;
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kfree(urbl);
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}
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}
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/*------------------------------------------------------------------------------
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* Allocates endpoint structure and optionally a buffer. If a buffer is
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* allocated it immediately follows the endpoint structure.
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* Context: softirq
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*/
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static struct oz_endpoint *oz_ep_alloc(gfp_t mem_flags, int buffer_size)
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{
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struct oz_endpoint *ep =
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kzalloc(sizeof(struct oz_endpoint)+buffer_size, mem_flags);
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if (ep) {
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INIT_LIST_HEAD(&ep->urb_list);
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INIT_LIST_HEAD(&ep->link);
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ep->credit = -1;
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if (buffer_size) {
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ep->buffer_size = buffer_size;
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ep->buffer = (u8 *)(ep+1);
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}
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}
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return ep;
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}
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/*------------------------------------------------------------------------------
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* Pre-condition: Must be called with g_tasklet_lock held and interrupts
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* disabled.
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* Context: softirq or process
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*/
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struct oz_urb_link *oz_uncancel_urb(struct oz_hcd *ozhcd, struct urb *urb)
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{
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struct oz_urb_link *urbl;
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struct list_head *e;
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list_for_each(e, &ozhcd->urb_cancel_list) {
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urbl = container_of(e, struct oz_urb_link, link);
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if (urb == urbl->urb) {
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list_del_init(e);
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return urbl;
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}
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}
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return 0;
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}
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/*------------------------------------------------------------------------------
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* This is called when we have finished processing an urb. It unlinks it from
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* the ep and returns it to the core.
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* Context: softirq or process
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*/
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static void oz_complete_urb(struct usb_hcd *hcd, struct urb *urb,
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int status, unsigned long submit_jiffies)
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{
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struct oz_hcd *ozhcd = oz_hcd_private(hcd);
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unsigned long irq_state;
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struct oz_urb_link *cancel_urbl = 0;
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spin_lock_irqsave(&g_tasklet_lock, irq_state);
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usb_hcd_unlink_urb_from_ep(hcd, urb);
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/* Clear hcpriv which will prevent it being put in the cancel list
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* in the event that an attempt is made to cancel it.
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*/
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urb->hcpriv = 0;
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/* Walk the cancel list in case the urb is already sitting there.
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* Since we process the cancel list in a tasklet rather than in
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* the dequeue function this could happen.
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*/
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cancel_urbl = oz_uncancel_urb(ozhcd, urb);
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/* Note: we release lock but do not enable local irqs.
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* It appears that usb_hcd_giveback_urb() expects irqs to be disabled,
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* or at least other host controllers disable interrupts at this point
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* so we do the same. We must, however, release the lock otherwise a
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* deadlock will occur if an urb is submitted to our driver in the urb
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* completion function. Because we disable interrupts it is possible
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* that the urb_enqueue function can be called with them disabled.
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*/
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spin_unlock(&g_tasklet_lock);
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if (oz_forget_urb(urb)) {
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oz_trace("OZWPAN: ERROR Unknown URB %p\n", urb);
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} else {
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static unsigned long last_time;
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atomic_dec(&g_pending_urbs);
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oz_trace2(OZ_TRACE_URB,
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"%lu: giveback_urb(%p,%x) %lu %lu pending:%d\n",
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jiffies, urb, status, jiffies-submit_jiffies,
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jiffies-last_time, atomic_read(&g_pending_urbs));
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last_time = jiffies;
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oz_event_log(OZ_EVT_URB_DONE, 0, 0, urb, status);
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usb_hcd_giveback_urb(hcd, urb, status);
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}
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spin_lock(&g_tasklet_lock);
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spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
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if (cancel_urbl)
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oz_free_urb_link(cancel_urbl);
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}
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/*------------------------------------------------------------------------------
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* Deallocates an endpoint including deallocating any associated stream and
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* returning any queued urbs to the core.
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* Context: softirq
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*/
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static void oz_ep_free(struct oz_port *port, struct oz_endpoint *ep)
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{
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oz_trace("oz_ep_free()\n");
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if (port) {
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struct list_head list;
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struct oz_hcd *ozhcd = port->ozhcd;
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INIT_LIST_HEAD(&list);
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if (ep->flags & OZ_F_EP_HAVE_STREAM)
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oz_usb_stream_delete(port->hpd, ep->ep_num);
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/* Transfer URBs to the orphanage while we hold the lock. */
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spin_lock_bh(&ozhcd->hcd_lock);
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/* Note: this works even if ep->urb_list is empty.*/
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list_replace_init(&ep->urb_list, &list);
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/* Put the URBs in the orphanage. */
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list_splice_tail(&list, &ozhcd->orphanage);
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spin_unlock_bh(&ozhcd->hcd_lock);
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}
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oz_trace("Freeing endpoint memory\n");
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kfree(ep);
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}
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/*------------------------------------------------------------------------------
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* Context: softirq
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*/
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static int oz_enqueue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
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struct urb *urb, u8 req_id)
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{
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struct oz_urb_link *urbl;
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struct oz_endpoint *ep;
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int err = 0;
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if (ep_addr >= OZ_NB_ENDPOINTS) {
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oz_trace("Invalid endpoint number in oz_enqueue_ep_urb().\n");
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return -EINVAL;
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}
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urbl = oz_alloc_urb_link();
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if (!urbl)
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return -ENOMEM;
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urbl->submit_jiffies = jiffies;
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urbl->urb = urb;
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urbl->req_id = req_id;
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urbl->ep_num = ep_addr;
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/* Hold lock while we insert the URB into the list within the
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* endpoint structure.
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*/
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spin_lock_bh(&port->ozhcd->hcd_lock);
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/* If the urb has been unlinked while out of any list then
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* complete it now.
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*/
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if (urb->unlinked) {
|
|
spin_unlock_bh(&port->ozhcd->hcd_lock);
|
|
oz_trace("urb %p unlinked so complete immediately\n", urb);
|
|
oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
|
|
oz_free_urb_link(urbl);
|
|
return 0;
|
|
}
|
|
if (in_dir)
|
|
ep = port->in_ep[ep_addr];
|
|
else
|
|
ep = port->out_ep[ep_addr];
|
|
if (ep && port->hpd) {
|
|
list_add_tail(&urbl->link, &ep->urb_list);
|
|
if (!in_dir && ep_addr && (ep->credit < 0)) {
|
|
ep->last_jiffies = jiffies;
|
|
ep->credit = 0;
|
|
oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num,
|
|
0, 0, ep->credit);
|
|
}
|
|
} else {
|
|
err = -EPIPE;
|
|
}
|
|
spin_unlock_bh(&port->ozhcd->hcd_lock);
|
|
if (err)
|
|
oz_free_urb_link(urbl);
|
|
return err;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Removes an urb from the queue in the endpoint.
|
|
* Returns 0 if it is found and -EIDRM otherwise.
|
|
* Context: softirq
|
|
*/
|
|
static int oz_dequeue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
|
|
struct urb *urb)
|
|
{
|
|
struct oz_urb_link *urbl = 0;
|
|
struct oz_endpoint *ep;
|
|
spin_lock_bh(&port->ozhcd->hcd_lock);
|
|
if (in_dir)
|
|
ep = port->in_ep[ep_addr];
|
|
else
|
|
ep = port->out_ep[ep_addr];
|
|
if (ep) {
|
|
struct list_head *e;
|
|
list_for_each(e, &ep->urb_list) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
if (urbl->urb == urb) {
|
|
list_del_init(e);
|
|
break;
|
|
}
|
|
urbl = 0;
|
|
}
|
|
}
|
|
spin_unlock_bh(&port->ozhcd->hcd_lock);
|
|
if (urbl)
|
|
oz_free_urb_link(urbl);
|
|
return urbl ? 0 : -EIDRM;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Finds an urb given its request id.
|
|
* Context: softirq
|
|
*/
|
|
static struct urb *oz_find_urb_by_id(struct oz_port *port, int ep_ix,
|
|
u8 req_id)
|
|
{
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
struct urb *urb = 0;
|
|
struct oz_urb_link *urbl = 0;
|
|
struct oz_endpoint *ep;
|
|
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
ep = port->out_ep[ep_ix];
|
|
if (ep) {
|
|
struct list_head *e;
|
|
list_for_each(e, &ep->urb_list) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
if (urbl->req_id == req_id) {
|
|
urb = urbl->urb;
|
|
list_del_init(e);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
/* If urb is non-zero then we we must have an urb link to delete.
|
|
*/
|
|
if (urb)
|
|
oz_free_urb_link(urbl);
|
|
return urb;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Pre-condition: Port lock must be held.
|
|
* Context: softirq
|
|
*/
|
|
static void oz_acquire_port(struct oz_port *port, void *hpd)
|
|
{
|
|
INIT_LIST_HEAD(&port->isoc_out_ep);
|
|
INIT_LIST_HEAD(&port->isoc_in_ep);
|
|
port->flags |= OZ_PORT_F_PRESENT | OZ_PORT_F_CHANGED;
|
|
port->status |= USB_PORT_STAT_CONNECTION |
|
|
(USB_PORT_STAT_C_CONNECTION << 16);
|
|
oz_usb_get(hpd);
|
|
port->hpd = hpd;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static struct oz_hcd *oz_hcd_claim(void)
|
|
{
|
|
struct oz_hcd *ozhcd;
|
|
spin_lock_bh(&g_hcdlock);
|
|
ozhcd = g_ozhcd;
|
|
if (ozhcd)
|
|
usb_get_hcd(ozhcd->hcd);
|
|
spin_unlock_bh(&g_hcdlock);
|
|
return ozhcd;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static inline void oz_hcd_put(struct oz_hcd *ozhcd)
|
|
{
|
|
if (ozhcd)
|
|
usb_put_hcd(ozhcd->hcd);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* This is called by the protocol handler to notify that a PD has arrived.
|
|
* We allocate a port to associate with the PD and create a structure for
|
|
* endpoint 0. This port is made the connection port.
|
|
* In the event that one of the other port is already a connection port then
|
|
* we fail.
|
|
* TODO We should be able to do better than fail and should be able remember
|
|
* that this port needs configuring and make it the connection port once the
|
|
* current connection port has been assigned an address. Collisions here are
|
|
* probably very rare indeed.
|
|
* Context: softirq
|
|
*/
|
|
void *oz_hcd_pd_arrived(void *hpd)
|
|
{
|
|
int i;
|
|
void *hport = 0;
|
|
struct oz_hcd *ozhcd = 0;
|
|
struct oz_endpoint *ep;
|
|
oz_trace("oz_hcd_pd_arrived()\n");
|
|
ozhcd = oz_hcd_claim();
|
|
if (ozhcd == 0)
|
|
return 0;
|
|
/* Allocate an endpoint object in advance (before holding hcd lock) to
|
|
* use for out endpoint 0.
|
|
*/
|
|
ep = oz_ep_alloc(GFP_ATOMIC, 0);
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
if (ozhcd->conn_port >= 0) {
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
oz_trace("conn_port >= 0\n");
|
|
goto out;
|
|
}
|
|
for (i = 0; i < OZ_NB_PORTS; i++) {
|
|
struct oz_port *port = &ozhcd->ports[i];
|
|
spin_lock(&port->port_lock);
|
|
if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
|
|
oz_acquire_port(port, hpd);
|
|
spin_unlock(&port->port_lock);
|
|
break;
|
|
}
|
|
spin_unlock(&port->port_lock);
|
|
}
|
|
if (i < OZ_NB_PORTS) {
|
|
oz_trace("Setting conn_port = %d\n", i);
|
|
ozhcd->conn_port = i;
|
|
/* Attach out endpoint 0.
|
|
*/
|
|
ozhcd->ports[i].out_ep[0] = ep;
|
|
ep = 0;
|
|
hport = &ozhcd->ports[i];
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
if (ozhcd->flags & OZ_HDC_F_SUSPENDED) {
|
|
oz_trace("Resuming root hub\n");
|
|
usb_hcd_resume_root_hub(ozhcd->hcd);
|
|
}
|
|
usb_hcd_poll_rh_status(ozhcd->hcd);
|
|
} else {
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
}
|
|
out:
|
|
if (ep) /* ep is non-null if not used. */
|
|
oz_ep_free(0, ep);
|
|
oz_hcd_put(ozhcd);
|
|
return hport;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* This is called by the protocol handler to notify that the PD has gone away.
|
|
* We need to deallocate all resources and then request that the root hub is
|
|
* polled. We release the reference we hold on the PD.
|
|
* Context: softirq
|
|
*/
|
|
void oz_hcd_pd_departed(void *hport)
|
|
{
|
|
struct oz_port *port = (struct oz_port *)hport;
|
|
struct oz_hcd *ozhcd;
|
|
void *hpd;
|
|
struct oz_endpoint *ep = 0;
|
|
|
|
oz_trace("oz_hcd_pd_departed()\n");
|
|
if (port == 0) {
|
|
oz_trace("oz_hcd_pd_departed() port = 0\n");
|
|
return;
|
|
}
|
|
ozhcd = port->ozhcd;
|
|
if (ozhcd == 0)
|
|
return;
|
|
/* Check if this is the connection port - if so clear it.
|
|
*/
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
if ((ozhcd->conn_port >= 0) &&
|
|
(port == &ozhcd->ports[ozhcd->conn_port])) {
|
|
oz_trace("Clearing conn_port\n");
|
|
ozhcd->conn_port = -1;
|
|
}
|
|
spin_lock(&port->port_lock);
|
|
port->flags |= OZ_PORT_F_DYING;
|
|
spin_unlock(&port->port_lock);
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
|
|
oz_clean_endpoints_for_config(ozhcd->hcd, port);
|
|
spin_lock_bh(&port->port_lock);
|
|
hpd = port->hpd;
|
|
port->hpd = 0;
|
|
port->bus_addr = 0xff;
|
|
port->flags &= ~(OZ_PORT_F_PRESENT | OZ_PORT_F_DYING);
|
|
port->flags |= OZ_PORT_F_CHANGED;
|
|
port->status &= ~USB_PORT_STAT_CONNECTION;
|
|
port->status |= (USB_PORT_STAT_C_CONNECTION << 16);
|
|
/* If there is an endpont 0 then clear the pointer while we hold
|
|
* the spinlock be we deallocate it after releasing the lock.
|
|
*/
|
|
if (port->out_ep[0]) {
|
|
ep = port->out_ep[0];
|
|
port->out_ep[0] = 0;
|
|
}
|
|
spin_unlock_bh(&port->port_lock);
|
|
if (ep)
|
|
oz_ep_free(port, ep);
|
|
usb_hcd_poll_rh_status(ozhcd->hcd);
|
|
oz_usb_put(hpd);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
void oz_hcd_pd_reset(void *hpd, void *hport)
|
|
{
|
|
/* Cleanup the current configuration and report reset to the core.
|
|
*/
|
|
struct oz_port *port = (struct oz_port *)hport;
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
oz_trace("PD Reset\n");
|
|
spin_lock_bh(&port->port_lock);
|
|
port->flags |= OZ_PORT_F_CHANGED;
|
|
port->status |= USB_PORT_STAT_RESET;
|
|
port->status |= (USB_PORT_STAT_C_RESET << 16);
|
|
spin_unlock_bh(&port->port_lock);
|
|
oz_clean_endpoints_for_config(ozhcd->hcd, port);
|
|
usb_hcd_poll_rh_status(ozhcd->hcd);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
void oz_hcd_get_desc_cnf(void *hport, u8 req_id, int status, u8 *desc,
|
|
int length, int offset, int total_size)
|
|
{
|
|
struct oz_port *port = (struct oz_port *)hport;
|
|
struct urb *urb;
|
|
int err = 0;
|
|
|
|
oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, 0, status);
|
|
oz_trace("oz_hcd_get_desc_cnf length = %d offs = %d tot_size = %d\n",
|
|
length, offset, total_size);
|
|
urb = oz_find_urb_by_id(port, 0, req_id);
|
|
if (!urb)
|
|
return;
|
|
if (status == 0) {
|
|
int copy_len;
|
|
int required_size = urb->transfer_buffer_length;
|
|
if (required_size > total_size)
|
|
required_size = total_size;
|
|
copy_len = required_size-offset;
|
|
if (length <= copy_len)
|
|
copy_len = length;
|
|
memcpy(urb->transfer_buffer+offset, desc, copy_len);
|
|
offset += copy_len;
|
|
if (offset < required_size) {
|
|
struct usb_ctrlrequest *setup =
|
|
(struct usb_ctrlrequest *)urb->setup_packet;
|
|
unsigned wvalue = le16_to_cpu(setup->wValue);
|
|
if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
|
|
err = -ENOMEM;
|
|
else if (oz_usb_get_desc_req(port->hpd, req_id,
|
|
setup->bRequestType, (u8)(wvalue>>8),
|
|
(u8)wvalue, setup->wIndex, offset,
|
|
required_size-offset)) {
|
|
oz_dequeue_ep_urb(port, 0, 0, urb);
|
|
err = -ENOMEM;
|
|
}
|
|
if (err == 0)
|
|
return;
|
|
}
|
|
}
|
|
urb->actual_length = total_size;
|
|
oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
#ifdef WANT_TRACE
|
|
static void oz_display_conf_type(u8 t)
|
|
{
|
|
switch (t) {
|
|
case USB_REQ_GET_STATUS:
|
|
oz_trace("USB_REQ_GET_STATUS - cnf\n");
|
|
break;
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
oz_trace("USB_REQ_CLEAR_FEATURE - cnf\n");
|
|
break;
|
|
case USB_REQ_SET_FEATURE:
|
|
oz_trace("USB_REQ_SET_FEATURE - cnf\n");
|
|
break;
|
|
case USB_REQ_SET_ADDRESS:
|
|
oz_trace("USB_REQ_SET_ADDRESS - cnf\n");
|
|
break;
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
oz_trace("USB_REQ_GET_DESCRIPTOR - cnf\n");
|
|
break;
|
|
case USB_REQ_SET_DESCRIPTOR:
|
|
oz_trace("USB_REQ_SET_DESCRIPTOR - cnf\n");
|
|
break;
|
|
case USB_REQ_GET_CONFIGURATION:
|
|
oz_trace("USB_REQ_GET_CONFIGURATION - cnf\n");
|
|
break;
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
oz_trace("USB_REQ_SET_CONFIGURATION - cnf\n");
|
|
break;
|
|
case USB_REQ_GET_INTERFACE:
|
|
oz_trace("USB_REQ_GET_INTERFACE - cnf\n");
|
|
break;
|
|
case USB_REQ_SET_INTERFACE:
|
|
oz_trace("USB_REQ_SET_INTERFACE - cnf\n");
|
|
break;
|
|
case USB_REQ_SYNCH_FRAME:
|
|
oz_trace("USB_REQ_SYNCH_FRAME - cnf\n");
|
|
break;
|
|
}
|
|
}
|
|
#else
|
|
#define oz_display_conf_type(__x)
|
|
#endif /* WANT_TRACE */
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static void oz_hcd_complete_set_config(struct oz_port *port, struct urb *urb,
|
|
u8 rcode, u8 config_num)
|
|
{
|
|
int rc = 0;
|
|
struct usb_hcd *hcd = port->ozhcd->hcd;
|
|
if (rcode == 0) {
|
|
port->config_num = config_num;
|
|
oz_clean_endpoints_for_config(hcd, port);
|
|
if (oz_build_endpoints_for_config(hcd, port,
|
|
&urb->dev->config[port->config_num-1], GFP_ATOMIC)) {
|
|
rc = -ENOMEM;
|
|
}
|
|
} else {
|
|
rc = -ENOMEM;
|
|
}
|
|
oz_complete_urb(hcd, urb, rc, 0);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static void oz_hcd_complete_set_interface(struct oz_port *port, struct urb *urb,
|
|
u8 rcode, u8 if_num, u8 alt)
|
|
{
|
|
struct usb_hcd *hcd = port->ozhcd->hcd;
|
|
int rc = 0;
|
|
if (rcode == 0) {
|
|
struct usb_host_config *config;
|
|
struct usb_host_interface *intf;
|
|
oz_trace("Set interface %d alt %d\n", if_num, alt);
|
|
oz_clean_endpoints_for_interface(hcd, port, if_num);
|
|
config = &urb->dev->config[port->config_num-1];
|
|
intf = &config->intf_cache[if_num]->altsetting[alt];
|
|
if (oz_build_endpoints_for_interface(hcd, port, intf,
|
|
GFP_ATOMIC))
|
|
rc = -ENOMEM;
|
|
else
|
|
port->iface[if_num].alt = alt;
|
|
} else {
|
|
rc = -ENOMEM;
|
|
}
|
|
oz_complete_urb(hcd, urb, rc, 0);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
void oz_hcd_control_cnf(void *hport, u8 req_id, u8 rcode, u8 *data,
|
|
int data_len)
|
|
{
|
|
struct oz_port *port = (struct oz_port *)hport;
|
|
struct urb *urb;
|
|
struct usb_ctrlrequest *setup;
|
|
struct usb_hcd *hcd = port->ozhcd->hcd;
|
|
unsigned windex;
|
|
unsigned wvalue;
|
|
|
|
oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, 0, rcode);
|
|
oz_trace("oz_hcd_control_cnf rcode=%u len=%d\n", rcode, data_len);
|
|
urb = oz_find_urb_by_id(port, 0, req_id);
|
|
if (!urb) {
|
|
oz_trace("URB not found\n");
|
|
return;
|
|
}
|
|
setup = (struct usb_ctrlrequest *)urb->setup_packet;
|
|
windex = le16_to_cpu(setup->wIndex);
|
|
wvalue = le16_to_cpu(setup->wValue);
|
|
if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
|
|
/* Standard requests */
|
|
oz_display_conf_type(setup->bRequest);
|
|
switch (setup->bRequest) {
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
oz_hcd_complete_set_config(port, urb, rcode,
|
|
(u8)wvalue);
|
|
break;
|
|
case USB_REQ_SET_INTERFACE:
|
|
oz_hcd_complete_set_interface(port, urb, rcode,
|
|
(u8)windex, (u8)wvalue);
|
|
break;
|
|
default:
|
|
oz_complete_urb(hcd, urb, 0, 0);
|
|
}
|
|
|
|
} else {
|
|
int copy_len;
|
|
oz_trace("VENDOR-CLASS - cnf\n");
|
|
if (data_len <= urb->transfer_buffer_length)
|
|
copy_len = data_len;
|
|
else
|
|
copy_len = urb->transfer_buffer_length;
|
|
if (copy_len)
|
|
memcpy(urb->transfer_buffer, data, copy_len);
|
|
urb->actual_length = copy_len;
|
|
oz_complete_urb(hcd, urb, 0, 0);
|
|
}
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq-serialized
|
|
*/
|
|
static int oz_hcd_buffer_data(struct oz_endpoint *ep, u8 *data, int data_len)
|
|
{
|
|
int space;
|
|
int copy_len;
|
|
if (!ep->buffer)
|
|
return -1;
|
|
space = ep->out_ix-ep->in_ix-1;
|
|
if (space < 0)
|
|
space += ep->buffer_size;
|
|
if (space < (data_len+1)) {
|
|
oz_trace("Buffer full\n");
|
|
return -1;
|
|
}
|
|
ep->buffer[ep->in_ix] = (u8)data_len;
|
|
if (++ep->in_ix == ep->buffer_size)
|
|
ep->in_ix = 0;
|
|
copy_len = ep->buffer_size - ep->in_ix;
|
|
if (copy_len > data_len)
|
|
copy_len = data_len;
|
|
memcpy(&ep->buffer[ep->in_ix], data, copy_len);
|
|
|
|
if (copy_len < data_len) {
|
|
memcpy(ep->buffer, data+copy_len, data_len-copy_len);
|
|
ep->in_ix = data_len-copy_len;
|
|
} else {
|
|
ep->in_ix += copy_len;
|
|
}
|
|
if (ep->in_ix == ep->buffer_size)
|
|
ep->in_ix = 0;
|
|
ep->buffered_units++;
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq-serialized
|
|
*/
|
|
void oz_hcd_data_ind(void *hport, u8 endpoint, u8 *data, int data_len)
|
|
{
|
|
struct oz_port *port = (struct oz_port *)hport;
|
|
struct oz_endpoint *ep;
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
ep = port->in_ep[endpoint & USB_ENDPOINT_NUMBER_MASK];
|
|
if (ep == 0)
|
|
goto done;
|
|
switch (ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) {
|
|
case USB_ENDPOINT_XFER_INT:
|
|
case USB_ENDPOINT_XFER_BULK:
|
|
if (!list_empty(&ep->urb_list)) {
|
|
struct oz_urb_link *urbl =
|
|
list_first_entry(&ep->urb_list,
|
|
struct oz_urb_link, link);
|
|
struct urb *urb;
|
|
int copy_len;
|
|
list_del_init(&urbl->link);
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
urb = urbl->urb;
|
|
oz_free_urb_link(urbl);
|
|
if (data_len <= urb->transfer_buffer_length)
|
|
copy_len = data_len;
|
|
else
|
|
copy_len = urb->transfer_buffer_length;
|
|
memcpy(urb->transfer_buffer, data, copy_len);
|
|
urb->actual_length = copy_len;
|
|
oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
|
|
return;
|
|
}
|
|
break;
|
|
case USB_ENDPOINT_XFER_ISOC:
|
|
oz_hcd_buffer_data(ep, data, data_len);
|
|
break;
|
|
}
|
|
done:
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static inline int oz_usb_get_frame_number(void)
|
|
{
|
|
return jiffies_to_msecs(get_jiffies_64());
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
int oz_hcd_heartbeat(void *hport)
|
|
{
|
|
int rc = 0;
|
|
struct oz_port *port = (struct oz_port *)hport;
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
struct oz_urb_link *urbl;
|
|
struct list_head xfr_list;
|
|
struct list_head *e;
|
|
struct list_head *n;
|
|
struct urb *urb;
|
|
struct oz_endpoint *ep;
|
|
unsigned long now = jiffies;
|
|
INIT_LIST_HEAD(&xfr_list);
|
|
/* Check the OUT isoc endpoints to see if any URB data can be sent.
|
|
*/
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
list_for_each(e, &port->isoc_out_ep) {
|
|
ep = ep_from_link(e);
|
|
if (ep->credit < 0)
|
|
continue;
|
|
ep->credit += (now - ep->last_jiffies);
|
|
if (ep->credit > ep->credit_ceiling)
|
|
ep->credit = ep->credit_ceiling;
|
|
oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, 0, ep->credit);
|
|
ep->last_jiffies = now;
|
|
while (ep->credit && !list_empty(&ep->urb_list)) {
|
|
urbl = list_first_entry(&ep->urb_list,
|
|
struct oz_urb_link, link);
|
|
urb = urbl->urb;
|
|
if (ep->credit < urb->number_of_packets)
|
|
break;
|
|
ep->credit -= urb->number_of_packets;
|
|
oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, 0,
|
|
ep->credit);
|
|
list_del(&urbl->link);
|
|
list_add_tail(&urbl->link, &xfr_list);
|
|
}
|
|
}
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
/* Send to PD and complete URBs.
|
|
*/
|
|
list_for_each_safe(e, n, &xfr_list) {
|
|
unsigned long t;
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
urb = urbl->urb;
|
|
t = urbl->submit_jiffies;
|
|
list_del_init(e);
|
|
urb->error_count = 0;
|
|
urb->start_frame = oz_usb_get_frame_number();
|
|
oz_usb_send_isoc(port->hpd, urbl->ep_num, urb);
|
|
oz_free_urb_link(urbl);
|
|
oz_complete_urb(port->ozhcd->hcd, urb, 0, t);
|
|
}
|
|
/* Check the IN isoc endpoints to see if any URBs can be completed.
|
|
*/
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
list_for_each(e, &port->isoc_in_ep) {
|
|
struct oz_endpoint *ep = ep_from_link(e);
|
|
if (ep->flags & OZ_F_EP_BUFFERING) {
|
|
if (ep->buffered_units * OZ_IN_BUFFERING_UNITS) {
|
|
ep->flags &= ~OZ_F_EP_BUFFERING;
|
|
ep->credit = 0;
|
|
oz_event_log(OZ_EVT_EP_CREDIT,
|
|
ep->ep_num | USB_DIR_IN,
|
|
0, 0, ep->credit);
|
|
ep->last_jiffies = now;
|
|
ep->start_frame = 0;
|
|
oz_event_log(OZ_EVT_EP_BUFFERING,
|
|
ep->ep_num | USB_DIR_IN, 0, 0, 0);
|
|
}
|
|
continue;
|
|
}
|
|
ep->credit += (now - ep->last_jiffies);
|
|
oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN,
|
|
0, 0, ep->credit);
|
|
ep->last_jiffies = now;
|
|
while (!list_empty(&ep->urb_list)) {
|
|
struct oz_urb_link *urbl =
|
|
list_first_entry(&ep->urb_list,
|
|
struct oz_urb_link, link);
|
|
struct urb *urb = urbl->urb;
|
|
int len = 0;
|
|
int copy_len;
|
|
int i;
|
|
if (ep->credit < urb->number_of_packets)
|
|
break;
|
|
if (ep->buffered_units < urb->number_of_packets)
|
|
break;
|
|
urb->actual_length = 0;
|
|
for (i = 0; i < urb->number_of_packets; i++) {
|
|
len = ep->buffer[ep->out_ix];
|
|
if (++ep->out_ix == ep->buffer_size)
|
|
ep->out_ix = 0;
|
|
copy_len = ep->buffer_size - ep->out_ix;
|
|
if (copy_len > len)
|
|
copy_len = len;
|
|
memcpy(urb->transfer_buffer,
|
|
&ep->buffer[ep->out_ix], copy_len);
|
|
if (copy_len < len) {
|
|
memcpy(urb->transfer_buffer+copy_len,
|
|
ep->buffer, len-copy_len);
|
|
ep->out_ix = len-copy_len;
|
|
} else
|
|
ep->out_ix += copy_len;
|
|
if (ep->out_ix == ep->buffer_size)
|
|
ep->out_ix = 0;
|
|
urb->iso_frame_desc[i].offset =
|
|
urb->actual_length;
|
|
urb->actual_length += len;
|
|
urb->iso_frame_desc[i].actual_length = len;
|
|
urb->iso_frame_desc[i].status = 0;
|
|
}
|
|
ep->buffered_units -= urb->number_of_packets;
|
|
urb->error_count = 0;
|
|
urb->start_frame = ep->start_frame;
|
|
ep->start_frame += urb->number_of_packets;
|
|
list_del(&urbl->link);
|
|
list_add_tail(&urbl->link, &xfr_list);
|
|
ep->credit -= urb->number_of_packets;
|
|
oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN,
|
|
0, 0, ep->credit);
|
|
}
|
|
}
|
|
if (!list_empty(&port->isoc_out_ep) || !list_empty(&port->isoc_in_ep))
|
|
rc = 1;
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
/* Complete the filled URBs.
|
|
*/
|
|
list_for_each_safe(e, n, &xfr_list) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
urb = urbl->urb;
|
|
list_del_init(e);
|
|
oz_free_urb_link(urbl);
|
|
oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
|
|
}
|
|
/* Check if there are any ep0 requests that have timed out.
|
|
* If so resent to PD.
|
|
*/
|
|
ep = port->out_ep[0];
|
|
if (ep) {
|
|
struct list_head *e;
|
|
struct list_head *n;
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
list_for_each_safe(e, n, &ep->urb_list) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
if (time_after(now, urbl->submit_jiffies+HZ/2)) {
|
|
oz_trace("%ld: Request 0x%p timeout\n",
|
|
now, urbl->urb);
|
|
urbl->submit_jiffies = now;
|
|
list_del(e);
|
|
list_add_tail(e, &xfr_list);
|
|
}
|
|
}
|
|
if (!list_empty(&ep->urb_list))
|
|
rc = 1;
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
e = xfr_list.next;
|
|
while (e != &xfr_list) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
e = e->next;
|
|
oz_trace("Resending request to PD.\n");
|
|
oz_process_ep0_urb(ozhcd, urbl->urb, GFP_ATOMIC);
|
|
oz_free_urb_link(urbl);
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static int oz_build_endpoints_for_interface(struct usb_hcd *hcd,
|
|
struct oz_port *port,
|
|
struct usb_host_interface *intf, gfp_t mem_flags)
|
|
{
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
int i;
|
|
int if_ix = intf->desc.bInterfaceNumber;
|
|
int request_heartbeat = 0;
|
|
oz_trace("interface[%d] = %p\n", if_ix, intf);
|
|
for (i = 0; i < intf->desc.bNumEndpoints; i++) {
|
|
struct usb_host_endpoint *hep = &intf->endpoint[i];
|
|
u8 ep_addr = hep->desc.bEndpointAddress;
|
|
u8 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
|
|
struct oz_endpoint *ep;
|
|
int buffer_size = 0;
|
|
|
|
oz_trace("%d bEndpointAddress = %x\n", i, ep_addr);
|
|
if ((ep_addr & USB_ENDPOINT_DIR_MASK) &&
|
|
((hep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
|
|
== USB_ENDPOINT_XFER_ISOC)) {
|
|
buffer_size = 24*1024;
|
|
}
|
|
|
|
ep = oz_ep_alloc(mem_flags, buffer_size);
|
|
if (!ep) {
|
|
oz_clean_endpoints_for_interface(hcd, port, if_ix);
|
|
return -ENOMEM;
|
|
}
|
|
ep->attrib = hep->desc.bmAttributes;
|
|
ep->ep_num = ep_num;
|
|
if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
|
|
== USB_ENDPOINT_XFER_ISOC) {
|
|
oz_trace("wMaxPacketSize = %d\n",
|
|
hep->desc.wMaxPacketSize);
|
|
ep->credit_ceiling = 200;
|
|
if (ep_addr & USB_ENDPOINT_DIR_MASK) {
|
|
ep->flags |= OZ_F_EP_BUFFERING;
|
|
oz_event_log(OZ_EVT_EP_BUFFERING,
|
|
ep->ep_num | USB_DIR_IN, 1, 0, 0);
|
|
} else {
|
|
ep->flags |= OZ_F_EP_HAVE_STREAM;
|
|
if (oz_usb_stream_create(port->hpd, ep_num))
|
|
ep->flags &= ~OZ_F_EP_HAVE_STREAM;
|
|
}
|
|
}
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
if (ep_addr & USB_ENDPOINT_DIR_MASK) {
|
|
port->in_ep[ep_num] = ep;
|
|
port->iface[if_ix].ep_mask |=
|
|
(1<<(ep_num+OZ_NB_ENDPOINTS));
|
|
if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
|
|
== USB_ENDPOINT_XFER_ISOC) {
|
|
list_add_tail(&ep->link, &port->isoc_in_ep);
|
|
request_heartbeat = 1;
|
|
}
|
|
} else {
|
|
port->out_ep[ep_num] = ep;
|
|
port->iface[if_ix].ep_mask |= (1<<ep_num);
|
|
if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
|
|
== USB_ENDPOINT_XFER_ISOC) {
|
|
list_add_tail(&ep->link, &port->isoc_out_ep);
|
|
request_heartbeat = 1;
|
|
}
|
|
}
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
if (request_heartbeat && port->hpd)
|
|
oz_usb_request_heartbeat(port->hpd);
|
|
}
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd,
|
|
struct oz_port *port, int if_ix)
|
|
{
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
unsigned mask;
|
|
int i;
|
|
struct list_head ep_list;
|
|
|
|
oz_trace("Deleting endpoints for interface %d\n", if_ix);
|
|
if (if_ix >= port->num_iface)
|
|
return;
|
|
INIT_LIST_HEAD(&ep_list);
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
mask = port->iface[if_ix].ep_mask;
|
|
port->iface[if_ix].ep_mask = 0;
|
|
for (i = 0; i < OZ_NB_ENDPOINTS; i++) {
|
|
struct list_head *e;
|
|
/* Gather OUT endpoints.
|
|
*/
|
|
if ((mask & (1<<i)) && port->out_ep[i]) {
|
|
e = &port->out_ep[i]->link;
|
|
port->out_ep[i] = 0;
|
|
/* Remove from isoc list if present.
|
|
*/
|
|
list_del(e);
|
|
list_add_tail(e, &ep_list);
|
|
}
|
|
/* Gather IN endpoints.
|
|
*/
|
|
if ((mask & (1<<(i+OZ_NB_ENDPOINTS))) && port->in_ep[i]) {
|
|
e = &port->in_ep[i]->link;
|
|
port->in_ep[i] = 0;
|
|
list_del(e);
|
|
list_add_tail(e, &ep_list);
|
|
}
|
|
}
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
while (!list_empty(&ep_list)) {
|
|
struct oz_endpoint *ep =
|
|
list_first_entry(&ep_list, struct oz_endpoint, link);
|
|
list_del_init(&ep->link);
|
|
oz_ep_free(port, ep);
|
|
}
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static int oz_build_endpoints_for_config(struct usb_hcd *hcd,
|
|
struct oz_port *port, struct usb_host_config *config,
|
|
gfp_t mem_flags)
|
|
{
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
int i;
|
|
int num_iface = config->desc.bNumInterfaces;
|
|
if (num_iface) {
|
|
struct oz_interface *iface;
|
|
|
|
iface = kmalloc(num_iface*sizeof(struct oz_interface),
|
|
mem_flags | __GFP_ZERO);
|
|
if (!iface)
|
|
return -ENOMEM;
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
port->iface = iface;
|
|
port->num_iface = num_iface;
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
}
|
|
for (i = 0; i < num_iface; i++) {
|
|
struct usb_host_interface *intf =
|
|
&config->intf_cache[i]->altsetting[0];
|
|
if (oz_build_endpoints_for_interface(hcd, port, intf,
|
|
mem_flags))
|
|
goto fail;
|
|
}
|
|
return 0;
|
|
fail:
|
|
oz_clean_endpoints_for_config(hcd, port);
|
|
return -1;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
*/
|
|
static void oz_clean_endpoints_for_config(struct usb_hcd *hcd,
|
|
struct oz_port *port)
|
|
{
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
int i;
|
|
oz_trace("Deleting endpoints for configuration.\n");
|
|
for (i = 0; i < port->num_iface; i++)
|
|
oz_clean_endpoints_for_interface(hcd, port, i);
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
if (port->iface) {
|
|
oz_trace("Freeing interfaces object.\n");
|
|
kfree(port->iface);
|
|
port->iface = 0;
|
|
}
|
|
port->num_iface = 0;
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: tasklet
|
|
*/
|
|
static void *oz_claim_hpd(struct oz_port *port)
|
|
{
|
|
void *hpd = 0;
|
|
struct oz_hcd *ozhcd = port->ozhcd;
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
hpd = port->hpd;
|
|
if (hpd)
|
|
oz_usb_get(hpd);
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
return hpd;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: tasklet
|
|
*/
|
|
static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
|
|
gfp_t mem_flags)
|
|
{
|
|
struct usb_ctrlrequest *setup;
|
|
unsigned windex;
|
|
unsigned wvalue;
|
|
unsigned wlength;
|
|
void *hpd = 0;
|
|
u8 req_id;
|
|
int rc = 0;
|
|
unsigned complete = 0;
|
|
|
|
int port_ix = -1;
|
|
struct oz_port *port = 0;
|
|
|
|
oz_trace2(OZ_TRACE_URB, "%lu: oz_process_ep0_urb(%p)\n", jiffies, urb);
|
|
port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
|
|
if (port_ix < 0) {
|
|
rc = -EPIPE;
|
|
goto out;
|
|
}
|
|
port = &ozhcd->ports[port_ix];
|
|
if (((port->flags & OZ_PORT_F_PRESENT) == 0)
|
|
|| (port->flags & OZ_PORT_F_DYING)) {
|
|
oz_trace("Refusing URB port_ix = %d devnum = %d\n",
|
|
port_ix, urb->dev->devnum);
|
|
rc = -EPIPE;
|
|
goto out;
|
|
}
|
|
/* Store port in private context data.
|
|
*/
|
|
urb->hcpriv = port;
|
|
setup = (struct usb_ctrlrequest *)urb->setup_packet;
|
|
windex = le16_to_cpu(setup->wIndex);
|
|
wvalue = le16_to_cpu(setup->wValue);
|
|
wlength = le16_to_cpu(setup->wLength);
|
|
oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequestType = %x\n",
|
|
setup->bRequestType);
|
|
oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequest = %x\n", setup->bRequest);
|
|
oz_trace2(OZ_TRACE_CTRL_DETAIL, "wValue = %x\n", wvalue);
|
|
oz_trace2(OZ_TRACE_CTRL_DETAIL, "wIndex = %x\n", windex);
|
|
oz_trace2(OZ_TRACE_CTRL_DETAIL, "wLength = %x\n", wlength);
|
|
|
|
req_id = port->next_req_id++;
|
|
hpd = oz_claim_hpd(port);
|
|
if (hpd == 0) {
|
|
oz_trace("Cannot claim port\n");
|
|
rc = -EPIPE;
|
|
goto out;
|
|
}
|
|
|
|
if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
|
|
/* Standard requests
|
|
*/
|
|
switch (setup->bRequest) {
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
oz_trace("USB_REQ_GET_DESCRIPTOR - req\n");
|
|
break;
|
|
case USB_REQ_SET_ADDRESS:
|
|
oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest,
|
|
0, 0, setup->bRequestType);
|
|
oz_trace("USB_REQ_SET_ADDRESS - req\n");
|
|
oz_trace("Port %d address is 0x%x\n", ozhcd->conn_port,
|
|
(u8)le16_to_cpu(setup->wValue));
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
if (ozhcd->conn_port >= 0) {
|
|
ozhcd->ports[ozhcd->conn_port].bus_addr =
|
|
(u8)le16_to_cpu(setup->wValue);
|
|
oz_trace("Clearing conn_port\n");
|
|
ozhcd->conn_port = -1;
|
|
}
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
complete = 1;
|
|
break;
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
oz_trace("USB_REQ_SET_CONFIGURATION - req\n");
|
|
break;
|
|
case USB_REQ_GET_CONFIGURATION:
|
|
/* We short curcuit this case and reply directly since
|
|
* we have the selected configuration number cached.
|
|
*/
|
|
oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0, 0,
|
|
setup->bRequestType);
|
|
oz_trace("USB_REQ_GET_CONFIGURATION - reply now\n");
|
|
if (urb->transfer_buffer_length >= 1) {
|
|
urb->actual_length = 1;
|
|
*((u8 *)urb->transfer_buffer) =
|
|
port->config_num;
|
|
complete = 1;
|
|
} else {
|
|
rc = -EPIPE;
|
|
}
|
|
break;
|
|
case USB_REQ_GET_INTERFACE:
|
|
/* We short curcuit this case and reply directly since
|
|
* we have the selected interface alternative cached.
|
|
*/
|
|
oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0, 0,
|
|
setup->bRequestType);
|
|
oz_trace("USB_REQ_GET_INTERFACE - reply now\n");
|
|
if (urb->transfer_buffer_length >= 1) {
|
|
urb->actual_length = 1;
|
|
*((u8 *)urb->transfer_buffer) =
|
|
port->iface[(u8)windex].alt;
|
|
oz_trace("interface = %d alt = %d\n",
|
|
windex, port->iface[(u8)windex].alt);
|
|
complete = 1;
|
|
} else {
|
|
rc = -EPIPE;
|
|
}
|
|
break;
|
|
case USB_REQ_SET_INTERFACE:
|
|
oz_trace("USB_REQ_SET_INTERFACE - req\n");
|
|
break;
|
|
}
|
|
}
|
|
if (!rc && !complete) {
|
|
int data_len = 0;
|
|
if ((setup->bRequestType & USB_DIR_IN) == 0)
|
|
data_len = wlength;
|
|
if (oz_usb_control_req(port->hpd, req_id, setup,
|
|
urb->transfer_buffer, data_len)) {
|
|
rc = -ENOMEM;
|
|
} else {
|
|
/* Note: we are queuing the request after we have
|
|
* submitted it to be tranmitted. If the request were
|
|
* to complete before we queued it then it would not
|
|
* be found in the queue. It seems impossible for
|
|
* this to happen but if it did the request would
|
|
* be resubmitted so the problem would hopefully
|
|
* resolve itself. Putting the request into the
|
|
* queue before it has been sent is worse since the
|
|
* urb could be cancelled while we are using it
|
|
* to build the request.
|
|
*/
|
|
if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
|
|
rc = -ENOMEM;
|
|
}
|
|
}
|
|
oz_usb_put(hpd);
|
|
out:
|
|
if (rc || complete) {
|
|
oz_trace("Completing request locally\n");
|
|
oz_complete_urb(ozhcd->hcd, urb, rc, 0);
|
|
} else {
|
|
oz_usb_request_heartbeat(port->hpd);
|
|
}
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: tasklet
|
|
*/
|
|
static int oz_urb_process(struct oz_hcd *ozhcd, struct urb *urb)
|
|
{
|
|
int rc = 0;
|
|
struct oz_port *port = urb->hcpriv;
|
|
u8 ep_addr;
|
|
/* When we are paranoid we keep a list of urbs which we check against
|
|
* before handing one back. This is just for debugging during
|
|
* development and should be turned off in the released driver.
|
|
*/
|
|
oz_remember_urb(urb);
|
|
/* Check buffer is valid.
|
|
*/
|
|
if (!urb->transfer_buffer && urb->transfer_buffer_length)
|
|
return -EINVAL;
|
|
/* Check if there is a device at the port - refuse if not.
|
|
*/
|
|
if ((port->flags & OZ_PORT_F_PRESENT) == 0)
|
|
return -EPIPE;
|
|
ep_addr = usb_pipeendpoint(urb->pipe);
|
|
if (ep_addr) {
|
|
/* If the request is not for EP0 then queue it.
|
|
*/
|
|
if (oz_enqueue_ep_urb(port, ep_addr, usb_pipein(urb->pipe),
|
|
urb, 0))
|
|
rc = -EPIPE;
|
|
} else {
|
|
oz_process_ep0_urb(ozhcd, urb, GFP_ATOMIC);
|
|
}
|
|
return rc;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: tasklet
|
|
*/
|
|
static void oz_urb_process_tasklet(unsigned long unused)
|
|
{
|
|
unsigned long irq_state;
|
|
struct urb *urb;
|
|
struct oz_hcd *ozhcd = oz_hcd_claim();
|
|
int rc = 0;
|
|
if (ozhcd == 0)
|
|
return;
|
|
/* This is called from a tasklet so is in softirq context but the urb
|
|
* list is filled from any context so we need to lock
|
|
* appropriately while removing urbs.
|
|
*/
|
|
spin_lock_irqsave(&g_tasklet_lock, irq_state);
|
|
while (!list_empty(&ozhcd->urb_pending_list)) {
|
|
struct oz_urb_link *urbl =
|
|
list_first_entry(&ozhcd->urb_pending_list,
|
|
struct oz_urb_link, link);
|
|
list_del_init(&urbl->link);
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
urb = urbl->urb;
|
|
oz_free_urb_link(urbl);
|
|
rc = oz_urb_process(ozhcd, urb);
|
|
if (rc)
|
|
oz_complete_urb(ozhcd->hcd, urb, rc, 0);
|
|
spin_lock_irqsave(&g_tasklet_lock, irq_state);
|
|
}
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
oz_hcd_put(ozhcd);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* This function searches for the urb in any of the lists it could be in.
|
|
* If it is found it is removed from the list and completed. If the urb is
|
|
* being processed then it won't be in a list so won't be found. However, the
|
|
* call to usb_hcd_check_unlink_urb() will set the value of the unlinked field
|
|
* to a non-zero value. When an attempt is made to put the urb back in a list
|
|
* the unlinked field will be checked and the urb will then be completed.
|
|
* Context: tasklet
|
|
*/
|
|
static void oz_urb_cancel(struct oz_port *port, u8 ep_num, struct urb *urb)
|
|
{
|
|
struct oz_urb_link *urbl = 0;
|
|
struct list_head *e;
|
|
struct oz_hcd *ozhcd;
|
|
unsigned long irq_state;
|
|
u8 ix;
|
|
if (port == 0) {
|
|
oz_trace("ERRORERROR: oz_urb_cancel(%p) port is null\n", urb);
|
|
return;
|
|
}
|
|
ozhcd = port->ozhcd;
|
|
if (ozhcd == 0) {
|
|
oz_trace("ERRORERROR: oz_urb_cancel(%p) ozhcd is null\n", urb);
|
|
return;
|
|
}
|
|
|
|
/* Look in the tasklet queue.
|
|
*/
|
|
spin_lock_irqsave(&g_tasklet_lock, irq_state);
|
|
list_for_each(e, &ozhcd->urb_cancel_list) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
if (urb == urbl->urb) {
|
|
list_del_init(e);
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
goto out2;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
urbl = 0;
|
|
|
|
/* Look in the orphanage.
|
|
*/
|
|
spin_lock_irqsave(&ozhcd->hcd_lock, irq_state);
|
|
list_for_each(e, &ozhcd->orphanage) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
if (urbl->urb == urb) {
|
|
list_del(e);
|
|
oz_trace("Found urb in orphanage\n");
|
|
goto out;
|
|
}
|
|
}
|
|
ix = (ep_num & 0xf);
|
|
urbl = 0;
|
|
if ((ep_num & USB_DIR_IN) && ix)
|
|
urbl = oz_remove_urb(port->in_ep[ix], urb);
|
|
else
|
|
urbl = oz_remove_urb(port->out_ep[ix], urb);
|
|
out:
|
|
spin_unlock_irqrestore(&ozhcd->hcd_lock, irq_state);
|
|
out2:
|
|
if (urbl) {
|
|
urb->actual_length = 0;
|
|
oz_free_urb_link(urbl);
|
|
oz_complete_urb(ozhcd->hcd, urb, -EPIPE, 0);
|
|
}
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: tasklet
|
|
*/
|
|
static void oz_urb_cancel_tasklet(unsigned long unused)
|
|
{
|
|
unsigned long irq_state;
|
|
struct urb *urb;
|
|
struct oz_hcd *ozhcd = oz_hcd_claim();
|
|
if (ozhcd == 0)
|
|
return;
|
|
spin_lock_irqsave(&g_tasklet_lock, irq_state);
|
|
while (!list_empty(&ozhcd->urb_cancel_list)) {
|
|
struct oz_urb_link *urbl =
|
|
list_first_entry(&ozhcd->urb_cancel_list,
|
|
struct oz_urb_link, link);
|
|
list_del_init(&urbl->link);
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
urb = urbl->urb;
|
|
if (urb->unlinked)
|
|
oz_urb_cancel(urbl->port, urbl->ep_num, urb);
|
|
oz_free_urb_link(urbl);
|
|
spin_lock_irqsave(&g_tasklet_lock, irq_state);
|
|
}
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
oz_hcd_put(ozhcd);
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status)
|
|
{
|
|
if (ozhcd) {
|
|
struct oz_urb_link *urbl;
|
|
while (!list_empty(&ozhcd->orphanage)) {
|
|
urbl = list_first_entry(&ozhcd->orphanage,
|
|
struct oz_urb_link, link);
|
|
list_del(&urbl->link);
|
|
oz_complete_urb(ozhcd->hcd, urbl->urb, status, 0);
|
|
oz_free_urb_link(urbl);
|
|
}
|
|
}
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static int oz_hcd_start(struct usb_hcd *hcd)
|
|
{
|
|
oz_trace("oz_hcd_start()\n");
|
|
hcd->power_budget = 200;
|
|
hcd->state = HC_STATE_RUNNING;
|
|
hcd->uses_new_polling = 1;
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static void oz_hcd_stop(struct usb_hcd *hcd)
|
|
{
|
|
oz_trace("oz_hcd_stop()\n");
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static void oz_hcd_shutdown(struct usb_hcd *hcd)
|
|
{
|
|
oz_trace("oz_hcd_shutdown()\n");
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: any
|
|
*/
|
|
#ifdef WANT_EVENT_TRACE
|
|
static u8 oz_get_irq_ctx(void)
|
|
{
|
|
u8 irq_info = 0;
|
|
if (in_interrupt())
|
|
irq_info |= 1;
|
|
if (in_irq())
|
|
irq_info |= 2;
|
|
return irq_info;
|
|
}
|
|
#endif /* WANT_EVENT_TRACE */
|
|
/*------------------------------------------------------------------------------
|
|
* Called to queue an urb for the device.
|
|
* This function should return a non-zero error code if it fails the urb but
|
|
* should not call usb_hcd_giveback_urb().
|
|
* Context: any
|
|
*/
|
|
static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
|
|
gfp_t mem_flags)
|
|
{
|
|
struct oz_hcd *ozhcd = oz_hcd_private(hcd);
|
|
int rc = 0;
|
|
int port_ix;
|
|
struct oz_port *port;
|
|
unsigned long irq_state;
|
|
struct oz_urb_link *urbl;
|
|
oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_enqueue(%p)\n",
|
|
jiffies, urb);
|
|
oz_event_log(OZ_EVT_URB_SUBMIT, oz_get_irq_ctx(),
|
|
(u16)urb->number_of_packets, urb, urb->pipe);
|
|
if (unlikely(ozhcd == 0)) {
|
|
oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not ozhcd.\n",
|
|
jiffies, urb);
|
|
return -EPIPE;
|
|
}
|
|
if (unlikely(hcd->state != HC_STATE_RUNNING)) {
|
|
oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not running.\n",
|
|
jiffies, urb);
|
|
return -EPIPE;
|
|
}
|
|
port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
|
|
if (port_ix < 0)
|
|
return -EPIPE;
|
|
port = &ozhcd->ports[port_ix];
|
|
if (port == 0)
|
|
return -EPIPE;
|
|
if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
|
|
oz_trace("Refusing URB port_ix = %d devnum = %d\n",
|
|
port_ix, urb->dev->devnum);
|
|
return -EPIPE;
|
|
}
|
|
urb->hcpriv = port;
|
|
/* Put request in queue for processing by tasklet.
|
|
*/
|
|
urbl = oz_alloc_urb_link();
|
|
if (unlikely(urbl == 0))
|
|
return -ENOMEM;
|
|
urbl->urb = urb;
|
|
spin_lock_irqsave(&g_tasklet_lock, irq_state);
|
|
rc = usb_hcd_link_urb_to_ep(hcd, urb);
|
|
if (unlikely(rc)) {
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
oz_free_urb_link(urbl);
|
|
return rc;
|
|
}
|
|
list_add_tail(&urbl->link, &ozhcd->urb_pending_list);
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
tasklet_schedule(&g_urb_process_tasklet);
|
|
atomic_inc(&g_pending_urbs);
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: tasklet
|
|
*/
|
|
static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep,
|
|
struct urb *urb)
|
|
{
|
|
struct oz_urb_link *urbl = 0;
|
|
struct list_head *e;
|
|
if (unlikely(ep == 0))
|
|
return 0;
|
|
list_for_each(e, &ep->urb_list) {
|
|
urbl = container_of(e, struct oz_urb_link, link);
|
|
if (urbl->urb == urb) {
|
|
list_del_init(e);
|
|
if (usb_pipeisoc(urb->pipe)) {
|
|
ep->credit -= urb->number_of_packets;
|
|
if (ep->credit < 0)
|
|
ep->credit = 0;
|
|
oz_event_log(OZ_EVT_EP_CREDIT,
|
|
usb_pipein(urb->pipe) ?
|
|
(ep->ep_num | USB_DIR_IN) : ep->ep_num,
|
|
0, 0, ep->credit);
|
|
}
|
|
return urbl;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Called to dequeue a previously submitted urb for the device.
|
|
* Context: any
|
|
*/
|
|
static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
|
|
{
|
|
struct oz_hcd *ozhcd = oz_hcd_private(hcd);
|
|
struct oz_urb_link *urbl = 0;
|
|
int rc;
|
|
unsigned long irq_state;
|
|
oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_dequeue(%p)\n", jiffies, urb);
|
|
urbl = oz_alloc_urb_link();
|
|
if (unlikely(urbl == 0))
|
|
return -ENOMEM;
|
|
spin_lock_irqsave(&g_tasklet_lock, irq_state);
|
|
/* The following function checks the urb is still in the queue
|
|
* maintained by the core and that the unlinked field is zero.
|
|
* If both are true the function sets the unlinked field and returns
|
|
* zero. Otherwise it returns an error.
|
|
*/
|
|
rc = usb_hcd_check_unlink_urb(hcd, urb, status);
|
|
/* We have to check we haven't completed the urb or are about
|
|
* to complete it. When we do we set hcpriv to 0 so if this has
|
|
* already happened we don't put the urb in the cancel queue.
|
|
*/
|
|
if ((rc == 0) && urb->hcpriv) {
|
|
urbl->urb = urb;
|
|
urbl->port = (struct oz_port *)urb->hcpriv;
|
|
urbl->ep_num = usb_pipeendpoint(urb->pipe);
|
|
if (usb_pipein(urb->pipe))
|
|
urbl->ep_num |= USB_DIR_IN;
|
|
list_add_tail(&urbl->link, &ozhcd->urb_cancel_list);
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
tasklet_schedule(&g_urb_cancel_tasklet);
|
|
} else {
|
|
spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
|
|
oz_free_urb_link(urbl);
|
|
}
|
|
return rc;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static void oz_hcd_endpoint_disable(struct usb_hcd *hcd,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
oz_trace("oz_hcd_endpoint_disable\n");
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static void oz_hcd_endpoint_reset(struct usb_hcd *hcd,
|
|
struct usb_host_endpoint *ep)
|
|
{
|
|
oz_trace("oz_hcd_endpoint_reset\n");
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static int oz_hcd_get_frame_number(struct usb_hcd *hcd)
|
|
{
|
|
oz_trace("oz_hcd_get_frame_number\n");
|
|
return oz_usb_get_frame_number();
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: softirq
|
|
* This is called as a consquence of us calling usb_hcd_poll_rh_status() and we
|
|
* always do that in softirq context.
|
|
*/
|
|
static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
|
|
{
|
|
struct oz_hcd *ozhcd = oz_hcd_private(hcd);
|
|
int i;
|
|
|
|
oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_status_data()\n");
|
|
buf[0] = 0;
|
|
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
for (i = 0; i < OZ_NB_PORTS; i++) {
|
|
if (ozhcd->ports[i].flags & OZ_PORT_F_CHANGED) {
|
|
oz_trace2(OZ_TRACE_HUB, "Port %d changed\n", i);
|
|
ozhcd->ports[i].flags &= ~OZ_PORT_F_CHANGED;
|
|
buf[0] |= 1<<(i+1);
|
|
}
|
|
}
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
return buf[0] ? 1 : 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static void oz_get_hub_descriptor(struct usb_hcd *hcd,
|
|
struct usb_hub_descriptor *desc)
|
|
{
|
|
oz_trace2(OZ_TRACE_HUB, "GetHubDescriptor\n");
|
|
memset(desc, 0, sizeof(*desc));
|
|
desc->bDescriptorType = 0x29;
|
|
desc->bDescLength = 9;
|
|
desc->wHubCharacteristics = (__force __u16)
|
|
__constant_cpu_to_le16(0x0001);
|
|
desc->bNbrPorts = OZ_NB_PORTS;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static int oz_set_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
|
|
{
|
|
struct oz_port *port;
|
|
int err = 0;
|
|
u8 port_id = (u8)windex;
|
|
struct oz_hcd *ozhcd = oz_hcd_private(hcd);
|
|
unsigned set_bits = 0;
|
|
unsigned clear_bits = 0;
|
|
oz_trace2(OZ_TRACE_HUB, "SetPortFeature\n");
|
|
if ((port_id < 1) || (port_id > OZ_NB_PORTS))
|
|
return -EPIPE;
|
|
port = &ozhcd->ports[port_id-1];
|
|
switch (wvalue) {
|
|
case USB_PORT_FEAT_CONNECTION:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
|
|
break;
|
|
case USB_PORT_FEAT_ENABLE:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
|
|
break;
|
|
case USB_PORT_FEAT_OVER_CURRENT:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
|
|
break;
|
|
case USB_PORT_FEAT_RESET:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
|
|
set_bits = USB_PORT_STAT_ENABLE | (USB_PORT_STAT_C_RESET<<16);
|
|
clear_bits = USB_PORT_STAT_RESET;
|
|
ozhcd->ports[port_id-1].bus_addr = 0;
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
|
|
set_bits |= USB_PORT_STAT_POWER;
|
|
break;
|
|
case USB_PORT_FEAT_LOWSPEED:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_CONNECTION:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_ENABLE:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_SUSPEND:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_RESET:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
|
|
break;
|
|
case USB_PORT_FEAT_TEST:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
|
|
break;
|
|
case USB_PORT_FEAT_INDICATOR:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
|
|
break;
|
|
default:
|
|
oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
|
|
break;
|
|
}
|
|
if (set_bits || clear_bits) {
|
|
spin_lock_bh(&port->port_lock);
|
|
port->status &= ~clear_bits;
|
|
port->status |= set_bits;
|
|
spin_unlock_bh(&port->port_lock);
|
|
}
|
|
oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
|
|
port->status);
|
|
return err;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static int oz_clear_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
|
|
{
|
|
struct oz_port *port;
|
|
int err = 0;
|
|
u8 port_id = (u8)windex;
|
|
struct oz_hcd *ozhcd = oz_hcd_private(hcd);
|
|
unsigned clear_bits = 0;
|
|
oz_trace2(OZ_TRACE_HUB, "ClearPortFeature\n");
|
|
if ((port_id < 1) || (port_id > OZ_NB_PORTS))
|
|
return -EPIPE;
|
|
port = &ozhcd->ports[port_id-1];
|
|
switch (wvalue) {
|
|
case USB_PORT_FEAT_CONNECTION:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
|
|
break;
|
|
case USB_PORT_FEAT_ENABLE:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
|
|
clear_bits = USB_PORT_STAT_ENABLE;
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
|
|
break;
|
|
case USB_PORT_FEAT_OVER_CURRENT:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
|
|
break;
|
|
case USB_PORT_FEAT_RESET:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
|
|
clear_bits |= USB_PORT_STAT_POWER;
|
|
break;
|
|
case USB_PORT_FEAT_LOWSPEED:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_CONNECTION:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
|
|
clear_bits = (USB_PORT_STAT_C_CONNECTION << 16);
|
|
break;
|
|
case USB_PORT_FEAT_C_ENABLE:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
|
|
clear_bits = (USB_PORT_STAT_C_ENABLE << 16);
|
|
break;
|
|
case USB_PORT_FEAT_C_SUSPEND:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
|
|
break;
|
|
case USB_PORT_FEAT_C_RESET:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
|
|
clear_bits = (USB_PORT_FEAT_C_RESET << 16);
|
|
break;
|
|
case USB_PORT_FEAT_TEST:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
|
|
break;
|
|
case USB_PORT_FEAT_INDICATOR:
|
|
oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
|
|
break;
|
|
default:
|
|
oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
|
|
break;
|
|
}
|
|
if (clear_bits) {
|
|
spin_lock_bh(&port->port_lock);
|
|
port->status &= ~clear_bits;
|
|
spin_unlock_bh(&port->port_lock);
|
|
}
|
|
oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
|
|
ozhcd->ports[port_id-1].status);
|
|
return err;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static int oz_get_port_status(struct usb_hcd *hcd, u16 windex, char *buf)
|
|
{
|
|
struct oz_hcd *ozhcd;
|
|
u32 status = 0;
|
|
if ((windex < 1) || (windex > OZ_NB_PORTS))
|
|
return -EPIPE;
|
|
ozhcd = oz_hcd_private(hcd);
|
|
oz_trace2(OZ_TRACE_HUB, "GetPortStatus windex = %d\n", windex);
|
|
status = ozhcd->ports[windex-1].status;
|
|
put_unaligned(cpu_to_le32(status), (__le32 *)buf);
|
|
oz_trace2(OZ_TRACE_HUB, "Port[%d] status = %x\n", windex, status);
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue,
|
|
u16 windex, char *buf, u16 wlength)
|
|
{
|
|
int err = 0;
|
|
oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_control()\n");
|
|
switch (req_type) {
|
|
case ClearHubFeature:
|
|
oz_trace2(OZ_TRACE_HUB, "ClearHubFeature: %d\n", req_type);
|
|
break;
|
|
case ClearPortFeature:
|
|
err = oz_clear_port_feature(hcd, wvalue, windex);
|
|
break;
|
|
case GetHubDescriptor:
|
|
oz_get_hub_descriptor(hcd, (struct usb_hub_descriptor *)buf);
|
|
break;
|
|
case GetHubStatus:
|
|
oz_trace2(OZ_TRACE_HUB, "GetHubStatus: req_type = 0x%x\n",
|
|
req_type);
|
|
put_unaligned(__constant_cpu_to_le32(0), (__le32 *)buf);
|
|
break;
|
|
case GetPortStatus:
|
|
err = oz_get_port_status(hcd, windex, buf);
|
|
break;
|
|
case SetHubFeature:
|
|
oz_trace2(OZ_TRACE_HUB, "SetHubFeature: %d\n", req_type);
|
|
break;
|
|
case SetPortFeature:
|
|
err = oz_set_port_feature(hcd, wvalue, windex);
|
|
break;
|
|
default:
|
|
oz_trace2(OZ_TRACE_HUB, "Other: %d\n", req_type);
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static int oz_hcd_bus_suspend(struct usb_hcd *hcd)
|
|
{
|
|
struct oz_hcd *ozhcd;
|
|
oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_suspend()\n");
|
|
ozhcd = oz_hcd_private(hcd);
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
hcd->state = HC_STATE_SUSPENDED;
|
|
ozhcd->flags |= OZ_HDC_F_SUSPENDED;
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static int oz_hcd_bus_resume(struct usb_hcd *hcd)
|
|
{
|
|
struct oz_hcd *ozhcd;
|
|
oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_resume()\n");
|
|
ozhcd = oz_hcd_private(hcd);
|
|
spin_lock_bh(&ozhcd->hcd_lock);
|
|
ozhcd->flags &= ~OZ_HDC_F_SUSPENDED;
|
|
hcd->state = HC_STATE_RUNNING;
|
|
spin_unlock_bh(&ozhcd->hcd_lock);
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
*/
|
|
static void oz_plat_shutdown(struct platform_device *dev)
|
|
{
|
|
oz_trace("oz_plat_shutdown()\n");
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
static int oz_plat_probe(struct platform_device *dev)
|
|
{
|
|
int i;
|
|
int err;
|
|
struct usb_hcd *hcd;
|
|
struct oz_hcd *ozhcd;
|
|
oz_trace("oz_plat_probe()\n");
|
|
hcd = usb_create_hcd(&g_oz_hc_drv, &dev->dev, dev_name(&dev->dev));
|
|
if (hcd == 0) {
|
|
oz_trace("Failed to created hcd object OK\n");
|
|
return -ENOMEM;
|
|
}
|
|
ozhcd = oz_hcd_private(hcd);
|
|
memset(ozhcd, 0, sizeof(*ozhcd));
|
|
INIT_LIST_HEAD(&ozhcd->urb_pending_list);
|
|
INIT_LIST_HEAD(&ozhcd->urb_cancel_list);
|
|
INIT_LIST_HEAD(&ozhcd->orphanage);
|
|
ozhcd->hcd = hcd;
|
|
ozhcd->conn_port = -1;
|
|
spin_lock_init(&ozhcd->hcd_lock);
|
|
for (i = 0; i < OZ_NB_PORTS; i++) {
|
|
struct oz_port *port = &ozhcd->ports[i];
|
|
port->ozhcd = ozhcd;
|
|
port->flags = 0;
|
|
port->status = 0;
|
|
port->bus_addr = 0xff;
|
|
spin_lock_init(&port->port_lock);
|
|
}
|
|
err = usb_add_hcd(hcd, 0, 0);
|
|
if (err) {
|
|
oz_trace("Failed to add hcd object OK\n");
|
|
usb_put_hcd(hcd);
|
|
return -1;
|
|
}
|
|
spin_lock_bh(&g_hcdlock);
|
|
g_ozhcd = ozhcd;
|
|
spin_unlock_bh(&g_hcdlock);
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static int oz_plat_remove(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
struct oz_hcd *ozhcd;
|
|
oz_trace("oz_plat_remove()\n");
|
|
if (hcd == 0)
|
|
return -1;
|
|
ozhcd = oz_hcd_private(hcd);
|
|
spin_lock_bh(&g_hcdlock);
|
|
if (ozhcd == g_ozhcd)
|
|
g_ozhcd = 0;
|
|
spin_unlock_bh(&g_hcdlock);
|
|
oz_trace("Clearing orphanage\n");
|
|
oz_hcd_clear_orphanage(ozhcd, -EPIPE);
|
|
oz_trace("Removing hcd\n");
|
|
usb_remove_hcd(hcd);
|
|
usb_put_hcd(hcd);
|
|
oz_empty_link_pool();
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg)
|
|
{
|
|
oz_trace("oz_plat_suspend()\n");
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: unknown
|
|
*/
|
|
static int oz_plat_resume(struct platform_device *dev)
|
|
{
|
|
oz_trace("oz_plat_resume()\n");
|
|
return 0;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
int oz_hcd_init(void)
|
|
{
|
|
int err;
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
tasklet_init(&g_urb_process_tasklet, oz_urb_process_tasklet, 0);
|
|
tasklet_init(&g_urb_cancel_tasklet, oz_urb_cancel_tasklet, 0);
|
|
err = platform_driver_register(&g_oz_plat_drv);
|
|
oz_trace("platform_driver_register() returned %d\n", err);
|
|
if (err)
|
|
goto error;
|
|
g_plat_dev = platform_device_alloc(OZ_PLAT_DEV_NAME, -1);
|
|
if (g_plat_dev == 0) {
|
|
err = -ENOMEM;
|
|
goto error1;
|
|
}
|
|
oz_trace("platform_device_alloc() succeeded\n");
|
|
err = platform_device_add(g_plat_dev);
|
|
if (err)
|
|
goto error2;
|
|
oz_trace("platform_device_add() succeeded\n");
|
|
return 0;
|
|
error2:
|
|
platform_device_put(g_plat_dev);
|
|
error1:
|
|
platform_driver_unregister(&g_oz_plat_drv);
|
|
error:
|
|
tasklet_disable(&g_urb_process_tasklet);
|
|
tasklet_disable(&g_urb_cancel_tasklet);
|
|
oz_trace("oz_hcd_init() failed %d\n", err);
|
|
return err;
|
|
}
|
|
/*------------------------------------------------------------------------------
|
|
* Context: process
|
|
*/
|
|
void oz_hcd_term(void)
|
|
{
|
|
tasklet_disable(&g_urb_process_tasklet);
|
|
tasklet_disable(&g_urb_cancel_tasklet);
|
|
platform_device_unregister(g_plat_dev);
|
|
platform_driver_unregister(&g_oz_plat_drv);
|
|
oz_trace("Pending urbs:%d\n", atomic_read(&g_pending_urbs));
|
|
}
|