iPXE
Functions | Variables
usbhub.c File Reference

USB hub driver. More...

#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <byteswap.h>
#include <ipxe/usb.h>
#include "usbhub.h"

Go to the source code of this file.

Functions

 FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
 
static void hub_refill (struct usb_hub_device *hubdev)
 Refill interrupt ring. More...
 
static void hub_complete (struct usb_endpoint *ep, struct io_buffer *iobuf, int rc)
 Complete interrupt transfer. More...
 
static int hub_open (struct usb_hub *hub)
 Open hub. More...
 
static void hub_close (struct usb_hub *hub)
 Close hub. More...
 
static int hub_enable (struct usb_hub *hub, struct usb_port *port)
 Enable port. More...
 
static int hub_disable (struct usb_hub *hub, struct usb_port *port)
 Disable port. More...
 
static int hub_clear_changes (struct usb_hub_device *hubdev, unsigned int port, uint16_t changed)
 Clear port status change bits. More...
 
static int hub_speed (struct usb_hub *hub, struct usb_port *port)
 Update port speed. More...
 
static int hub_clear_tt (struct usb_hub *hub, struct usb_port *port, struct usb_endpoint *ep)
 Clear transaction translator buffer. More...
 
static int hub_probe (struct usb_function *func, struct usb_configuration_descriptor *config)
 Probe USB hub. More...
 
static void hub_remove (struct usb_function *func)
 Remove USB hub. More...
 

Variables

static struct process_descriptor hub_refill_desc
 Refill process descriptor. More...
 
static struct usb_endpoint_driver_operations usb_hub_intr_operations
 Interrupt endpoint operations. More...
 
static struct usb_hub_driver_operations hub_operations
 USB hub operations. More...
 
static struct usb_device_id hub_ids []
 USB hub device IDs. More...
 
struct usb_driver usb_hub_driver __usb_driver
 USB hub driver. More...
 

Detailed Description

USB hub driver.

Definition in file usbhub.c.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL  )

◆ hub_refill()

static void hub_refill ( struct usb_hub_device hubdev)
static

Refill interrupt ring.

Parameters
hubdevHub device

Definition at line 46 of file usbhub.c.

46  {
47  int rc;
48 
49  /* Refill interrupt endpoint */
50  if ( ( rc = usb_refill ( &hubdev->intr ) ) != 0 ) {
51  DBGC ( hubdev, "HUB %s could not refill interrupt: %s\n",
52  hubdev->name, strerror ( rc ) );
53  /* Continue attempting to refill */
54  return;
55  }
56 
57  /* Stop refill process */
58  process_del ( &hubdev->refill );
59 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
struct usb_endpoint intr
Interrupt endpoint.
Definition: usbhub.h:264
#define DBGC(...)
Definition: compiler.h:505
void process_del(struct process *process)
Remove process from process list.
Definition: process.c:79
struct process refill
Interrupt endpoint refill process.
Definition: usbhub.h:266
int usb_refill(struct usb_endpoint *ep)
Refill endpoint.
Definition: usb.c:642
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
const char * name
Name.
Definition: usbhub.h:253

References DBGC, usb_hub_device::intr, usb_hub_device::name, process_del(), rc, usb_hub_device::refill, strerror(), and usb_refill().

Referenced by hub_open().

◆ hub_complete()

static void hub_complete ( struct usb_endpoint ep,
struct io_buffer iobuf,
int  rc 
)
static

Complete interrupt transfer.

Parameters
epUSB endpoint
iobufI/O buffer
rcCompletion status code

Definition at line 72 of file usbhub.c.

73  {
74  struct usb_hub_device *hubdev =
75  container_of ( ep, struct usb_hub_device, intr );
76  struct usb_hub *hub = hubdev->hub;
77  uint8_t *data = iobuf->data;
78  unsigned int bits = ( 8 * iob_len ( iobuf ) );
79  unsigned int i;
80 
81  /* Ignore packets cancelled when the endpoint closes */
82  if ( ! ep->open )
83  goto done;
84 
85  /* Ignore packets with errors */
86  if ( rc != 0 ) {
87  DBGC ( hubdev, "HUB %s interrupt failed: %s\n",
88  hubdev->name, strerror ( rc ) );
89  DBGC_HDA ( hubdev, 0, iobuf->data, iob_len ( iobuf ) );
90  goto done;
91  }
92 
93  /* Report any port status changes */
94  for ( i = 1 ; i <= hub->ports ; i++ ) {
95 
96  /* Sanity check */
97  if ( i > bits ) {
98  DBGC ( hubdev, "HUB %s underlength interrupt:\n",
99  hubdev->name );
100  DBGC_HDA ( hubdev, 0, iobuf->data, iob_len ( iobuf ) );
101  goto done;
102  }
103 
104  /* Report port status change if applicable */
105  if ( data[ i / 8 ] & ( 1 << ( i % 8 ) ) ) {
106  DBGC2 ( hubdev, "HUB %s port %d status changed\n",
107  hubdev->name, i );
108  usb_port_changed ( usb_port ( hub, i ) );
109  }
110  }
111 
112  done:
113  /* Start refill process */
114  process_add ( &hubdev->refill );
115 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
A USB hub.
Definition: usb.h:824
#define DBGC(...)
Definition: compiler.h:505
int open
Endpoint is open.
Definition: usb.h:404
struct process refill
Interrupt endpoint refill process.
Definition: usbhub.h:266
void usb_port_changed(struct usb_port *port)
Report port status change.
Definition: usb.c:1794
A USB port.
Definition: usb.h:796
#define container_of(ptr, type, field)
Get containing structure.
Definition: stddef.h:35
uint8_t intr
Interrupts enabled.
Definition: ena.h:14
#define DBGC_HDA(...)
Definition: compiler.h:506
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
unsigned int ports
Number of ports.
Definition: usb.h:834
void process_add(struct process *process)
Add process to process list.
Definition: process.c:59
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
static size_t iob_len(struct io_buffer *iobuf)
Calculate length of data in an I/O buffer.
Definition: iobuf.h:151
unsigned char uint8_t
Definition: stdint.h:10
static volatile void * bits
Definition: bitops.h:27
#define DBGC2(...)
Definition: compiler.h:522
void * data
Start of data.
Definition: iobuf.h:44
struct arbelprm_port_state_change_st data
Message.
Definition: arbel.h:12
const char * name
Name.
Definition: usbhub.h:253
struct bofm_section_header done
Definition: bofm_test.c:46

References bits, container_of, data, io_buffer::data, DBGC, DBGC2, DBGC_HDA, done, usb_hub_device::hub, intr, iob_len(), usb_hub_device::name, usb_endpoint::open, usb_hub::ports, process_add(), rc, usb_hub_device::refill, strerror(), and usb_port_changed().

◆ hub_open()

static int hub_open ( struct usb_hub hub)
static

Open hub.

Parameters
hubUSB hub
Return values
rcReturn status code

Definition at line 128 of file usbhub.c.

128  {
129  struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub );
130  struct usb_device *usb = hubdev->usb;
131  unsigned int i;
132  int rc;
133 
134  /* Ensure ports are powered */
135  for ( i = 1 ; i <= hub->ports ; i++ ) {
136  if ( ( rc = usb_hub_set_port_feature ( usb, i,
138  0 ) ) != 0 ) {
139  DBGC ( hubdev, "HUB %s port %d could not apply power: "
140  "%s\n", hubdev->name, i, strerror ( rc ) );
141  goto err_power;
142  }
143  }
144 
145  /* Open interrupt endpoint */
146  if ( ( rc = usb_endpoint_open ( &hubdev->intr ) ) != 0 ) {
147  DBGC ( hubdev, "HUB %s could not register interrupt: %s\n",
148  hubdev->name, strerror ( rc ) );
149  goto err_open;
150  }
151 
152  /* Start refill process */
153  process_add ( &hubdev->refill );
154 
155  /* Refill interrupt ring */
156  hub_refill ( hubdev );
157 
158  /* Delay to allow ports to stabilise on out-of-spec hubs */
159  if ( hubdev->flags & USB_HUB_SLOW_START )
161 
162  return 0;
163 
164  usb_endpoint_close ( &hubdev->intr );
165  err_open:
166  err_power:
167  return rc;
168 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
#define USB_HUB_SLOW_START_DELAY_MS
Additional setting delay for out-of-spec hubs.
Definition: usbhub.h:273
struct usb_endpoint intr
Interrupt endpoint.
Definition: usbhub.h:264
#define DBGC(...)
Definition: compiler.h:505
int usb_endpoint_open(struct usb_endpoint *ep)
Open USB endpoint.
Definition: usb.c:293
void usb_endpoint_close(struct usb_endpoint *ep)
Close USB endpoint.
Definition: usb.c:370
struct usb_device * usb
USB device.
Definition: usbhub.h:255
struct process refill
Interrupt endpoint refill process.
Definition: usbhub.h:266
#define USB_HUB_PORT_POWER
Port power feature.
Definition: usbhub.h:79
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
unsigned int ports
Number of ports.
Definition: usb.h:834
A USB device.
Definition: usb.h:706
void process_add(struct process *process)
Add process to process list.
Definition: process.c:59
static void hub_refill(struct usb_hub_device *hubdev)
Refill interrupt ring.
Definition: usbhub.c:46
unsigned int flags
Flags.
Definition: usbhub.h:261
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
void mdelay(unsigned long msecs)
Delay for a fixed number of milliseconds.
Definition: timer.c:78
static int usb_hub_set_port_feature(struct usb_device *usb, unsigned int port, unsigned int feature, unsigned int index)
Set port feature.
Definition: usbhub.h:202
#define USB_HUB_SLOW_START
Hub requires additional settling delay.
Definition: usbhub.h:270
const char * name
Name.
Definition: usbhub.h:253
static void * usb_hub_get_drvdata(struct usb_hub *hub)
Get USB hub driver private data.
Definition: usb.h:931

References DBGC, usb_hub_device::flags, usb_hub_device::hub, hub_refill(), usb_hub_device::intr, mdelay(), usb_hub_device::name, usb_hub::ports, process_add(), rc, usb_hub_device::refill, strerror(), usb_hub_device::usb, usb_endpoint_close(), usb_endpoint_open(), usb_hub_get_drvdata(), USB_HUB_PORT_POWER, usb_hub_set_port_feature(), USB_HUB_SLOW_START, and USB_HUB_SLOW_START_DELAY_MS.

◆ hub_close()

static void hub_close ( struct usb_hub hub)
static

Close hub.

Parameters
hubUSB hub

Definition at line 175 of file usbhub.c.

175  {
176  struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub );
177 
178  /* Close interrupt endpoint */
179  usb_endpoint_close ( &hubdev->intr );
180 
181  /* Stop refill process */
182  process_del ( &hubdev->refill );
183 }
struct usb_endpoint intr
Interrupt endpoint.
Definition: usbhub.h:264
void usb_endpoint_close(struct usb_endpoint *ep)
Close USB endpoint.
Definition: usb.c:370
void process_del(struct process *process)
Remove process from process list.
Definition: process.c:79
struct process refill
Interrupt endpoint refill process.
Definition: usbhub.h:266
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
static void * usb_hub_get_drvdata(struct usb_hub *hub)
Get USB hub driver private data.
Definition: usb.h:931

References usb_hub_device::hub, usb_hub_device::intr, process_del(), usb_hub_device::refill, usb_endpoint_close(), and usb_hub_get_drvdata().

◆ hub_enable()

static int hub_enable ( struct usb_hub hub,
struct usb_port port 
)
static

Enable port.

Parameters
hubUSB hub
portUSB port
Return values
rcReturn status code

Definition at line 192 of file usbhub.c.

192  {
193  struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub );
194  struct usb_device *usb = hubdev->usb;
196  unsigned int current;
197  unsigned int i;
198  int rc;
199 
200  /* Initiate reset if applicable */
201  if ( ( hub->protocol < USB_PROTO_3_0 ) &&
202  ( ( rc = usb_hub_set_port_feature ( usb, port->address,
203  USB_HUB_PORT_RESET, 0 ) )!=0)){
204  DBGC ( hubdev, "HUB %s port %d could not initiate reset: %s\n",
205  hubdev->name, port->address, strerror ( rc ) );
206  return rc;
207  }
208 
209  /* Wait for port to become enabled */
210  for ( i = 0 ; i < USB_HUB_ENABLE_MAX_WAIT_MS ; i++ ) {
211 
212  /* Check for port being enabled */
213  if ( ( rc = usb_hub_get_port_status ( usb, port->address,
214  &status ) ) != 0 ) {
215  DBGC ( hubdev, "HUB %s port %d could not get status: "
216  "%s\n", hubdev->name, port->address,
217  strerror ( rc ) );
218  return rc;
219  }
220  current = le16_to_cpu ( status.current );
221  if ( current & ( 1 << USB_HUB_PORT_ENABLE ) )
222  return 0;
223 
224  /* Delay */
225  mdelay ( 1 );
226  }
227 
228  DBGC ( hubdev, "HUB %s port %d timed out waiting for enable\n",
229  hubdev->name, port->address );
230  return -ETIMEDOUT;
231 }
#define USB_HUB_PORT_ENABLE
Port enabled/disabled feature.
Definition: usbhub.h:73
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
#define DBGC(...)
Definition: compiler.h:505
static int usb_hub_get_port_status(struct usb_device *usb, unsigned int port, struct usb_hub_port_status *status)
Get port status.
Definition: usbhub.h:168
struct usb_device * usb
USB device.
Definition: usbhub.h:255
uint8_t status
Status.
Definition: ena.h:16
#define USB_HUB_ENABLE_MAX_WAIT_MS
Maximum time to wait for port to become enabled.
Definition: usbhub.h:285
u8 port
Port number.
Definition: CIB_PRM.h:31
USB 3.0.
Definition: usb.h:24
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
A USB device.
Definition: usb.h:706
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
#define le16_to_cpu(value)
Definition: byteswap.h:112
Port status.
Definition: usbhub.h:62
void mdelay(unsigned long msecs)
Delay for a fixed number of milliseconds.
Definition: timer.c:78
static int usb_hub_set_port_feature(struct usb_device *usb, unsigned int port, unsigned int feature, unsigned int index)
Set port feature.
Definition: usbhub.h:202
#define USB_HUB_PORT_RESET
Port reset feature.
Definition: usbhub.h:76
unsigned int protocol
Hub protocol.
Definition: usb.h:832
uint16_t current
Current status.
Definition: usbhub.h:64
#define ETIMEDOUT
Connection timed out.
Definition: errno.h:669
const char * name
Name.
Definition: usbhub.h:253
static void * usb_hub_get_drvdata(struct usb_hub *hub)
Get USB hub driver private data.
Definition: usb.h:931

References usb_hub_port_status::current, DBGC, ETIMEDOUT, usb_hub_device::hub, le16_to_cpu, mdelay(), usb_hub_device::name, port, usb_hub::protocol, rc, status, strerror(), usb_hub_device::usb, USB_HUB_ENABLE_MAX_WAIT_MS, usb_hub_get_drvdata(), usb_hub_get_port_status(), USB_HUB_PORT_ENABLE, USB_HUB_PORT_RESET, usb_hub_set_port_feature(), and USB_PROTO_3_0.

◆ hub_disable()

static int hub_disable ( struct usb_hub hub,
struct usb_port port 
)
static

Disable port.

Parameters
hubUSB hub
portUSB port
Return values
rcReturn status code

Definition at line 240 of file usbhub.c.

240  {
241  struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub );
242  struct usb_device *usb = hubdev->usb;
243  int rc;
244 
245  /* Disable port */
246  if ( ( rc = usb_hub_clear_port_feature ( usb, port->address,
247  USB_HUB_PORT_ENABLE, 0 ) )!=0){
248  DBGC ( hubdev, "HUB %s port %d could not disable: %s\n",
249  hubdev->name, port->address, strerror ( rc ) );
250  return rc;
251  }
252 
253  return 0;
254 }
#define USB_HUB_PORT_ENABLE
Port enabled/disabled feature.
Definition: usbhub.h:73
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
#define DBGC(...)
Definition: compiler.h:505
struct usb_device * usb
USB device.
Definition: usbhub.h:255
u8 port
Port number.
Definition: CIB_PRM.h:31
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
static int usb_hub_clear_port_feature(struct usb_device *usb, unsigned int port, unsigned int feature, unsigned int index)
Clear port feature.
Definition: usbhub.h:185
A USB device.
Definition: usb.h:706
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
const char * name
Name.
Definition: usbhub.h:253
static void * usb_hub_get_drvdata(struct usb_hub *hub)
Get USB hub driver private data.
Definition: usb.h:931

References DBGC, usb_hub_device::hub, usb_hub_device::name, port, rc, strerror(), usb_hub_device::usb, usb_hub_clear_port_feature(), usb_hub_get_drvdata(), and USB_HUB_PORT_ENABLE.

◆ hub_clear_changes()

static int hub_clear_changes ( struct usb_hub_device hubdev,
unsigned int  port,
uint16_t  changed 
)
static

Clear port status change bits.

Parameters
hubdevUSB hub device
portPort number
changedPort status change bits
Return values
rcReturn status code

Definition at line 264 of file usbhub.c.

265  {
266  struct usb_device *usb = hubdev->usb;
267  unsigned int bit;
268  unsigned int feature;
269  int rc;
270 
271  /* Clear each set bit */
272  for ( bit = 0 ; bit < 16 ; bit++ ) {
273 
274  /* Skip unset bits */
275  if ( ! ( changed & ( 1 << bit ) ) )
276  continue;
277 
278  /* Skip unused features */
280  if ( ! ( hubdev->features & ( 1 << feature ) ) )
281  continue;
282 
283  /* Clear bit */
284  if ( ( rc = usb_hub_clear_port_feature ( usb, port,
285  feature, 0 ) ) != 0 ) {
286  DBGC ( hubdev, "HUB %s port %d could not clear feature "
287  "%d: %s\n", hubdev->name, port, feature,
288  strerror ( rc ) );
289  return rc;
290  }
291  }
292 
293  return 0;
294 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
static unsigned int unsigned int bit
Definition: bigint.h:205
unsigned int features
Features.
Definition: usbhub.h:259
#define DBGC(...)
Definition: compiler.h:505
struct usb_device * usb
USB device.
Definition: usbhub.h:255
union ena_feature feature
Feature.
Definition: ena.h:14
u8 port
Port number.
Definition: CIB_PRM.h:31
static int usb_hub_clear_port_feature(struct usb_device *usb, unsigned int port, unsigned int feature, unsigned int index)
Clear port feature.
Definition: usbhub.h:185
#define USB_HUB_C_FEATURE(bit)
Calculate feature from change bit number.
Definition: usbhub.h:109
A USB device.
Definition: usb.h:706
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
A named feature.
Definition: features.h:78
const char * name
Name.
Definition: usbhub.h:253

References bit, DBGC, feature, usb_hub_device::features, usb_hub_device::name, port, rc, strerror(), usb_hub_device::usb, USB_HUB_C_FEATURE, and usb_hub_clear_port_feature().

Referenced by hub_speed().

◆ hub_speed()

static int hub_speed ( struct usb_hub hub,
struct usb_port port 
)
static

Update port speed.

Parameters
hubUSB hub
portUSB port
Return values
rcReturn status code

Definition at line 303 of file usbhub.c.

303  {
304  struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub );
305  struct usb_device *usb = hubdev->usb;
307  unsigned int current;
308  unsigned int changed;
309  int rc;
310 
311  /* Get port status */
312  if ( ( rc = usb_hub_get_port_status ( usb, port->address,
313  &status ) ) != 0 ) {
314  DBGC ( hubdev, "HUB %s port %d could not get status: %s\n",
315  hubdev->name, port->address, strerror ( rc ) );
316  return rc;
317  }
318  current = le16_to_cpu ( status.current );
319  changed = le16_to_cpu ( status.changed );
320  DBGC2 ( hubdev, "HUB %s port %d status is %04x:%04x\n",
321  hubdev->name, port->address, changed, current );
322 
323  /* Update port speed */
324  if ( current & ( 1 << USB_HUB_PORT_CONNECTION ) ) {
325  if ( hub->protocol >= USB_PROTO_3_0 ) {
326  port->speed = USB_SPEED_SUPER;
327  } else if ( current & ( 1 << USB_HUB_PORT_LOW_SPEED ) ) {
328  port->speed = USB_SPEED_LOW;
329  } else if ( current & ( 1 << USB_HUB_PORT_HIGH_SPEED ) ) {
330  port->speed = USB_SPEED_HIGH;
331  } else {
332  port->speed = USB_SPEED_FULL;
333  }
334  } else {
335  port->speed = USB_SPEED_NONE;
336  }
337 
338  /* Record disconnections */
339  port->disconnected |= ( changed & ( 1 << USB_HUB_PORT_CONNECTION ) );
340 
341  /* Clear port status change bits */
342  if ( ( rc = hub_clear_changes ( hubdev, port->address, changed ) ) != 0)
343  return rc;
344 
345  return 0;
346 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
static int hub_clear_changes(struct usb_hub_device *hubdev, unsigned int port, uint16_t changed)
Clear port status change bits.
Definition: usbhub.c:264
Low speed (1.5Mbps)
Definition: usb.h:48
#define DBGC(...)
Definition: compiler.h:505
#define USB_HUB_PORT_HIGH_SPEED
High-speed device attached.
Definition: usbhub.h:85
static int usb_hub_get_port_status(struct usb_device *usb, unsigned int port, struct usb_hub_port_status *status)
Get port status.
Definition: usbhub.h:168
Super speed (5Gbps)
Definition: usb.h:54
struct usb_device * usb
USB device.
Definition: usbhub.h:255
uint8_t status
Status.
Definition: ena.h:16
u8 port
Port number.
Definition: CIB_PRM.h:31
USB 3.0.
Definition: usb.h:24
Not connected.
Definition: usb.h:46
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
A USB device.
Definition: usb.h:706
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
#define le16_to_cpu(value)
Definition: byteswap.h:112
#define USB_HUB_PORT_CONNECTION
Current connect status feature.
Definition: usbhub.h:70
Port status.
Definition: usbhub.h:62
uint16_t changed
Changed status.
Definition: usbhub.h:66
#define USB_HUB_PORT_LOW_SPEED
Low-speed device attached.
Definition: usbhub.h:82
#define DBGC2(...)
Definition: compiler.h:522
High speed (480Mbps)
Definition: usb.h:52
unsigned int protocol
Hub protocol.
Definition: usb.h:832
uint16_t current
Current status.
Definition: usbhub.h:64
const char * name
Name.
Definition: usbhub.h:253
Full speed (12Mbps)
Definition: usb.h:50
static void * usb_hub_get_drvdata(struct usb_hub *hub)
Get USB hub driver private data.
Definition: usb.h:931

References usb_hub_port_status::changed, usb_hub_port_status::current, DBGC, DBGC2, usb_hub_device::hub, hub_clear_changes(), le16_to_cpu, usb_hub_device::name, port, usb_hub::protocol, rc, status, strerror(), usb_hub_device::usb, usb_hub_get_drvdata(), usb_hub_get_port_status(), USB_HUB_PORT_CONNECTION, USB_HUB_PORT_HIGH_SPEED, USB_HUB_PORT_LOW_SPEED, USB_PROTO_3_0, USB_SPEED_FULL, USB_SPEED_HIGH, USB_SPEED_LOW, USB_SPEED_NONE, and USB_SPEED_SUPER.

◆ hub_clear_tt()

static int hub_clear_tt ( struct usb_hub hub,
struct usb_port port,
struct usb_endpoint ep 
)
static

Clear transaction translator buffer.

Parameters
hubUSB hub
portUSB port
epUSB endpoint
Return values
rcReturn status code

Definition at line 356 of file usbhub.c.

357  {
358  struct usb_hub_device *hubdev = usb_hub_get_drvdata ( hub );
359  struct usb_device *usb = hubdev->usb;
360  int rc;
361 
362  /* Clear transaction translator buffer. All hubs must support
363  * single-TT operation; we simplify our code by supporting
364  * only this configuration.
365  */
366  if ( ( rc = usb_hub_clear_tt_buffer ( usb, ep->usb->address,
367  ep->address, ep->attributes,
368  USB_HUB_TT_SINGLE ) ) != 0 ) {
369  DBGC ( hubdev, "HUB %s port %d could not clear TT buffer: %s\n",
370  hubdev->name, port->address, strerror ( rc ) );
371  return rc;
372  }
373 
374  return 0;
375 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
#define DBGC(...)
Definition: compiler.h:505
static int usb_hub_clear_tt_buffer(struct usb_device *usb, unsigned int device, unsigned int endpoint, unsigned int attributes, unsigned int tt_port)
Clear transaction translator buffer.
Definition: usbhub.h:233
struct usb_device * usb
USB device.
Definition: usbhub.h:255
unsigned int address
Device address, if assigned.
Definition: usb.h:716
u8 port
Port number.
Definition: CIB_PRM.h:31
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
#define USB_HUB_TT_SINGLE
Transaction translator port value for single-TT hubs.
Definition: usbhub.h:248
A USB device.
Definition: usb.h:706
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
struct usb_endpoint * ep[32]
Endpoint list.
Definition: usb.h:728
struct usb_device * usb
USB device.
Definition: usb.h:391
const char * name
Name.
Definition: usbhub.h:253
unsigned int attributes
Attributes.
Definition: usb.h:395
unsigned int address
Endpoint address.
Definition: usb.h:393
static void * usb_hub_get_drvdata(struct usb_hub *hub)
Get USB hub driver private data.
Definition: usb.h:931

References usb_endpoint::address, usb_device::address, usb_endpoint::attributes, DBGC, usb_device::ep, usb_hub_device::hub, usb_hub_device::name, port, rc, strerror(), usb_hub_device::usb, usb_endpoint::usb, usb_hub_clear_tt_buffer(), usb_hub_get_drvdata(), and USB_HUB_TT_SINGLE.

◆ hub_probe()

static int hub_probe ( struct usb_function func,
struct usb_configuration_descriptor config 
)
static

Probe USB hub.

Parameters
funcUSB function
configConfiguration descriptor
Return values
rcReturn status code

Definition at line 394 of file usbhub.c.

395  {
396  struct usb_device *usb = func->usb;
397  struct usb_bus *bus = usb->port->hub->bus;
398  struct usb_hub_device *hubdev;
400  union usb_hub_descriptor desc;
401  unsigned int depth;
402  unsigned int ports;
403  int enhanced;
404  int rc;
405 
406  /* Allocate and initialise structure */
407  hubdev = zalloc ( sizeof ( *hubdev ) );
408  if ( ! hubdev ) {
409  rc = -ENOMEM;
410  goto err_alloc;
411  }
412  enhanced = ( usb->port->protocol >= USB_PROTO_3_0 );
413  hubdev->name = func->name;
414  hubdev->usb = usb;
415  hubdev->features =
417  hubdev->flags = func->id->driver_data;
418  usb_endpoint_init ( &hubdev->intr, usb, &usb_hub_intr_operations );
419  usb_refill_init ( &hubdev->intr, 0, 0, USB_HUB_INTR_FILL );
421 
422  /* Locate hub interface descriptor */
423  interface = usb_interface_descriptor ( config, func->interface[0], 0 );
424  if ( ! interface ) {
425  DBGC ( hubdev, "HUB %s has no interface descriptor\n",
426  hubdev->name );
427  rc = -EINVAL;
428  goto err_interface;
429  }
430 
431  /* Locate interrupt endpoint descriptor */
432  if ( ( rc = usb_endpoint_described ( &hubdev->intr, config, interface,
433  USB_INTERRUPT_IN, 0 ) ) != 0 ) {
434  DBGC ( hubdev, "HUB %s could not describe interrupt endpoint: "
435  "%s\n", hubdev->name, strerror ( rc ) );
436  goto err_endpoint;
437  }
438 
439  /* Set hub depth */
440  depth = usb_depth ( usb );
441  if ( enhanced ) {
442  if ( ( rc = usb_hub_set_hub_depth ( usb, depth ) ) != 0 ) {
443  DBGC ( hubdev, "HUB %s could not set hub depth to %d: "
444  "%s\n", hubdev->name, depth, strerror ( rc ) );
445  goto err_set_hub_depth;
446  }
447  }
448 
449  /* Get hub descriptor */
450  if ( ( rc = usb_hub_get_descriptor ( usb, enhanced, &desc ) ) != 0 ) {
451  DBGC ( hubdev, "HUB %s could not get hub descriptor: %s\n",
452  hubdev->name, strerror ( rc ) );
453  goto err_hub_descriptor;
454  }
455  ports = desc.basic.ports;
456  DBGC ( hubdev, "HUB %s has %d ports at depth %d%s\n", hubdev->name,
457  ports, depth, ( enhanced ? " (enhanced)" : "" ) );
458 
459  /* Allocate hub */
460  hubdev->hub = alloc_usb_hub ( bus, usb, ports, &hub_operations );
461  if ( ! hubdev->hub ) {
462  rc = -ENOMEM;
463  goto err_alloc_hub;
464  }
465  usb_hub_set_drvdata ( hubdev->hub, hubdev );
466 
467  /* Register hub */
468  if ( ( rc = register_usb_hub ( hubdev->hub ) ) != 0 ) {
469  DBGC ( hubdev, "HUB %s could not register: %s\n",
470  hubdev->name, strerror ( rc ) );
471  goto err_register_hub;
472  }
473 
474  usb_func_set_drvdata ( func, hubdev );
475  return 0;
476 
477  unregister_usb_hub ( hubdev->hub );
478  err_register_hub:
479  free_usb_hub ( hubdev->hub );
480  err_alloc_hub:
481  err_hub_descriptor:
482  err_set_hub_depth:
483  err_endpoint:
484  err_interface:
485  free ( hubdev );
486  err_alloc:
487  return rc;
488 }
#define EINVAL
Invalid argument.
Definition: errno.h:428
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
const char * name
Name.
Definition: usb.h:659
static int usb_hub_get_descriptor(struct usb_device *usb, int enhanced, union usb_hub_descriptor *data)
Get hub descriptor.
Definition: usbhub.h:146
unsigned int features
Features.
Definition: usbhub.h:259
void unregister_usb_hub(struct usb_hub *hub)
Unregister USB hub.
Definition: usb.c:1966
struct usb_endpoint intr
Interrupt endpoint.
Definition: usbhub.h:264
#define DBGC(...)
Definition: compiler.h:505
unsigned int protocol
Port protocol.
Definition: usb.h:802
#define USB_HUB_INTR_FILL
Interrupt ring fill level.
Definition: usbhub.h:279
struct usb_hub_descriptor_enhanced enhanced
Enhanced hub descriptor.
Definition: usbhub.h:58
#define USB_INTERRUPT_IN
Interrupt IN endpoint (internal) type.
Definition: usb.h:287
struct usb_device * usb
USB device.
Definition: usbhub.h:255
int usb_endpoint_described(struct usb_endpoint *ep, struct usb_configuration_descriptor *config, struct usb_interface_descriptor *interface, unsigned int type, unsigned int index)
Describe USB endpoint from device configuration.
Definition: usb.c:241
struct process refill
Interrupt endpoint refill process.
Definition: usbhub.h:266
static int usb_hub_set_hub_depth(struct usb_device *usb, unsigned int depth)
Set hub depth.
Definition: usbhub.h:217
struct usb_device_id * id
Driver device ID.
Definition: usb.h:674
#define ENOMEM
Not enough space.
Definition: errno.h:534
A USB interface descriptor.
Definition: usb.h:230
struct usb_port * port
USB port.
Definition: usb.h:710
USB 3.0.
Definition: usb.h:24
An object interface.
Definition: interface.h:109
A USB hub device.
Definition: usbhub.h:251
static void usb_refill_init(struct usb_endpoint *ep, size_t reserve, size_t len, unsigned int max)
Initialise USB endpoint refill.
Definition: usb.h:601
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
A USB hub descriptor.
Definition: usbhub.h:52
static void usb_func_set_drvdata(struct usb_function *func, void *priv)
Set USB function driver private data.
Definition: usb.h:690
A USB device.
Definition: usb.h:706
unsigned int flags
Flags.
Definition: usbhub.h:261
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
static void(* free)(struct refcnt *refcnt))
Definition: refcnt.h:54
void * zalloc(size_t size)
Allocate cleared memory.
Definition: malloc.c:624
static struct usb_hub_driver_operations hub_operations
USB hub operations.
Definition: usbhub.c:378
unsigned int usb_depth(struct usb_device *usb)
Get USB depth.
Definition: usb.c:2241
static void process_init_stopped(struct process *process, struct process_descriptor *desc, struct refcnt *refcnt)
Initialise process without adding to process list.
Definition: process.h:145
struct usb_device * usb
USB device.
Definition: usb.h:661
static void usb_endpoint_init(struct usb_endpoint *ep, struct usb_device *usb, struct usb_endpoint_driver_operations *driver)
Initialise USB endpoint.
Definition: usb.h:525
static struct usb_endpoint_driver_operations usb_hub_intr_operations
Interrupt endpoint operations.
Definition: usbhub.c:118
unsigned long driver_data
Arbitrary driver data.
Definition: usb.h:1325
void free_usb_hub(struct usb_hub *hub)
Free USB hub.
Definition: usb.c:1999
#define USB_HUB_FEATURES
USB features.
Definition: usbhub.h:112
struct usb_hub * hub
USB hub.
Definition: usb.h:798
int register_usb_hub(struct usb_hub *hub)
Register USB hub.
Definition: usb.c:1912
static void usb_hub_set_drvdata(struct usb_hub *hub, void *priv)
Set USB hub driver private data.
Definition: usb.h:920
#define USB_HUB_FEATURES_ENHANCED
USB features for enhanced hubs.
Definition: usbhub.h:120
struct usb_bus * bus
USB bus.
Definition: usb.h:828
#define NULL
NULL pointer (VOID *)
Definition: Base.h:362
const char * name
Name.
Definition: usbhub.h:253
A USB bus.
Definition: usb.h:949
uint8_t interface
Interface number.
Definition: usb.h:234
uint8_t bus
Bus.
Definition: edd.h:14
static struct process_descriptor hub_refill_desc
Refill process descriptor.
Definition: usbhub.c:62
struct usb_hub * alloc_usb_hub(struct usb_bus *bus, struct usb_device *usb, unsigned int ports, struct usb_hub_driver_operations *driver)
Allocate USB hub.
Definition: usb.c:1873

References alloc_usb_hub(), usb_hub_descriptor::basic, bus, usb_hub::bus, DBGC, usb_device_id::driver_data, EINVAL, usb_hub_descriptor::enhanced, ENOMEM, usb_hub_device::features, usb_hub_device::flags, free, free_usb_hub(), usb_hub_device::hub, usb_port::hub, hub_operations, hub_refill_desc, usb_function::id, usb_interface_descriptor::interface, usb_hub_device::intr, usb_hub_device::name, usb_function::name, NULL, usb_device::port, usb_hub_descriptor_basic::ports, process_init_stopped(), usb_port::protocol, rc, usb_hub_device::refill, register_usb_hub(), strerror(), unregister_usb_hub(), usb_hub_device::usb, usb_function::usb, usb_depth(), usb_endpoint_described(), usb_endpoint_init(), usb_func_set_drvdata(), USB_HUB_FEATURES, USB_HUB_FEATURES_ENHANCED, usb_hub_get_descriptor(), USB_HUB_INTR_FILL, usb_hub_intr_operations, usb_hub_set_drvdata(), usb_hub_set_hub_depth(), USB_INTERRUPT_IN, USB_PROTO_3_0, usb_refill_init(), and zalloc().

◆ hub_remove()

static void hub_remove ( struct usb_function func)
static

Remove USB hub.

Parameters
funcUSB function
Return values
rcReturn status code

Definition at line 496 of file usbhub.c.

496  {
497  struct usb_hub_device *hubdev = usb_func_get_drvdata ( func );
498  struct usb_hub *hub = hubdev->hub;
499  struct usb_device *usb = hubdev->usb;
500  struct usb_port *port;
501  unsigned int i;
502 
503  /* If hub has been unplugged, mark all ports as unplugged */
504  if ( usb->port->disconnected ) {
505  for ( i = 1 ; i <= hub->ports ; i++ ) {
506  port = usb_port ( hub, i );
507  port->disconnected = 1;
508  port->speed = USB_SPEED_NONE;
509  }
510  }
511 
512  /* Unregister hub */
513  unregister_usb_hub ( hubdev->hub );
514  assert ( ! process_running ( &hubdev->refill ) );
515 
516  /* Free hub */
517  free_usb_hub ( hubdev->hub );
518 
519  /* Free hub device */
520  free ( hubdev );
521 }
static void * usb_func_get_drvdata(struct usb_function *func)
Get USB function driver private data.
Definition: usb.h:701
int disconnected
Port disconnection has been detected.
Definition: usb.h:810
A USB hub.
Definition: usb.h:824
void unregister_usb_hub(struct usb_hub *hub)
Unregister USB hub.
Definition: usb.c:1966
struct usb_device * usb
Currently attached device (if in use)
Definition: usb.h:818
struct usb_device * usb
USB device.
Definition: usbhub.h:255
struct process refill
Interrupt endpoint refill process.
Definition: usbhub.h:266
A USB port.
Definition: usb.h:796
u8 port
Port number.
Definition: CIB_PRM.h:31
struct usb_port * port
USB port.
Definition: usb.h:710
assert((readw(&hdr->flags) &(GTF_reading|GTF_writing))==0)
Not connected.
Definition: usb.h:46
A USB hub device.
Definition: usbhub.h:251
struct usb_hub * hub
USB hub.
Definition: usbhub.h:257
unsigned int ports
Number of ports.
Definition: usb.h:834
A USB device.
Definition: usb.h:706
static void(* free)(struct refcnt *refcnt))
Definition: refcnt.h:54
static int process_running(struct process *process)
Check if process is running.
Definition: process.h:175
void free_usb_hub(struct usb_hub *hub)
Free USB hub.
Definition: usb.c:1999
struct usb_hub * hub
USB hub.
Definition: usb.h:798
static struct usb_port * usb_port(struct usb_hub *hub, unsigned int address)
Get USB port.
Definition: usb.h:943

References assert(), usb_port::disconnected, free, free_usb_hub(), usb_hub_device::hub, usb_port::hub, port, usb_device::port, usb_hub::ports, process_running(), usb_hub_device::refill, unregister_usb_hub(), usb_hub_device::usb, usb_port::usb, usb_func_get_drvdata(), usb_port(), and USB_SPEED_NONE.

Variable Documentation

◆ hub_refill_desc

struct process_descriptor hub_refill_desc
static
Initial value:
=
PROC_DESC ( struct usb_hub_device, refill, hub_refill )
A USB hub device.
Definition: usbhub.h:251
static void hub_refill(struct usb_hub_device *hubdev)
Refill interrupt ring.
Definition: usbhub.c:46
#define PROC_DESC(object_type, process, _step)
Define a process descriptor.
Definition: process.h:82

Refill process descriptor.

Definition at line 62 of file usbhub.c.

Referenced by hub_probe().

◆ usb_hub_intr_operations

struct usb_endpoint_driver_operations usb_hub_intr_operations
static
Initial value:
= {
.complete = hub_complete,
}
static void hub_complete(struct usb_endpoint *ep, struct io_buffer *iobuf, int rc)
Complete interrupt transfer.
Definition: usbhub.c:72

Interrupt endpoint operations.

Definition at line 118 of file usbhub.c.

Referenced by hub_probe().

◆ hub_operations

struct usb_hub_driver_operations hub_operations
static
Initial value:
= {
.open = hub_open,
.close = hub_close,
.enable = hub_enable,
.disable = hub_disable,
.speed = hub_speed,
.clear_tt = hub_clear_tt,
}
static void hub_close(struct usb_hub *hub)
Close hub.
Definition: usbhub.c:175
static int hub_enable(struct usb_hub *hub, struct usb_port *port)
Enable port.
Definition: usbhub.c:192
static int hub_clear_tt(struct usb_hub *hub, struct usb_port *port, struct usb_endpoint *ep)
Clear transaction translator buffer.
Definition: usbhub.c:356
static int hub_open(struct usb_hub *hub)
Open hub.
Definition: usbhub.c:128
static int hub_disable(struct usb_hub *hub, struct usb_port *port)
Disable port.
Definition: usbhub.c:240
static int hub_speed(struct usb_hub *hub, struct usb_port *port)
Update port speed.
Definition: usbhub.c:303

USB hub operations.

Definition at line 378 of file usbhub.c.

Referenced by hub_probe().

◆ hub_ids

struct usb_device_id hub_ids[]
static
Initial value:
= {
{
.name = "avocent-hub",
.vendor = 0x0624,
.product = 0x0248,
.driver_data = USB_HUB_SLOW_START,
},
{
.name = "hub",
.vendor = USB_ANY_ID,
.product = USB_ANY_ID,
},
}
#define USB_ANY_ID
Match-anything ID.
Definition: usb.h:1329
#define USB_HUB_SLOW_START
Hub requires additional settling delay.
Definition: usbhub.h:270

USB hub device IDs.

Definition at line 524 of file usbhub.c.

◆ __usb_driver

struct usb_driver usb_hub_driver __usb_driver
Initial value:
= {
.ids = hub_ids,
.id_count = ( sizeof ( hub_ids ) / sizeof ( hub_ids[0] ) ),
.score = USB_SCORE_NORMAL,
.probe = hub_probe,
.remove = hub_remove,
}
static struct usb_device_id hub_ids[]
USB hub device IDs.
Definition: usbhub.c:524
#define USB_CLASS_ID(base, subclass, protocol)
Construct USB class ID.
Definition: usb.h:1345
Normal driver.
Definition: usb.h:1406
#define USB_CLASS_HUB
Class code for USB hubs.
Definition: usb.h:155
#define USB_ANY_ID
Match-anything ID.
Definition: usb.h:1329
static void hub_remove(struct usb_function *func)
Remove USB hub.
Definition: usbhub.c:496
static int hub_probe(struct usb_function *func, struct usb_configuration_descriptor *config)
Probe USB hub.
Definition: usbhub.c:394

USB hub driver.

Definition at line 539 of file usbhub.c.