iPXE
Macros | Functions | Variables
isapnp.c File Reference

ISAPnP bus support. More...

#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <ipxe/io.h>
#include <unistd.h>
#include <ipxe/isapnp.h>

Go to the source code of this file.

Macros

#define ISAPNP_CARD_ID_FMT   "ID %04x:%04x (\"%s\") serial %x"
 
#define ISAPNP_CARD_ID_DATA(identifier)
 
#define ISAPNP_DEV_ID_FMT   "ID %04x:%04x (\"%s\")"
 
#define ISAPNP_DEV_ID_DATA(isapnp)
 

Functions

 FILE_LICENCE (GPL2_OR_LATER)
 
static void isapnpbus_remove (struct root_device *rootdev)
 Remove ISAPnP root bus. More...
 
static void isapnp_write_address (unsigned int address)
 
static void isapnp_write_data (unsigned int data)
 
static unsigned int isapnp_read_data (void)
 
static void isapnp_write_byte (unsigned int address, unsigned int value)
 
static unsigned int isapnp_read_byte (unsigned int address)
 
static unsigned int isapnp_read_word (unsigned int address)
 
static void isapnp_set_read_port (void)
 Inform cards of a new read port address. More...
 
static void isapnp_serialisolation (void)
 Enter the Isolation state. More...
 
static void isapnp_wait_for_key (void)
 Enter the Wait for Key state. More...
 
static void isapnp_reset_csn (void)
 Reset (i.e. More...
 
static void isapnp_wake (uint8_t csn)
 Place a specified card into the Config state. More...
 
static unsigned int isapnp_read_resourcedata (void)
 
static unsigned int isapnp_read_status (void)
 
static void isapnp_write_csn (unsigned int csn)
 Assign a Card Select Number to a card, and enter the Config state. More...
 
static void isapnp_logicaldevice (unsigned int logdev)
 
static void isapnp_activate (unsigned int logdev)
 
static void isapnp_deactivate (unsigned int logdev)
 
static unsigned int isapnp_read_iobase (unsigned int index)
 
static unsigned int isapnp_read_irqno (unsigned int index)
 
static void isapnp_delay (void)
 
static unsigned int isapnp_lfsr_next (unsigned int lfsr, unsigned int input_bit)
 Linear feedback shift register. More...
 
static void isapnp_send_key (void)
 Send the ISAPnP initiation key. More...
 
static unsigned int isapnp_checksum (struct isapnp_identifier *identifier)
 Compute ISAPnP identifier checksum. More...
 
static unsigned int isapnp_peek_byte (void)
 
static void isapnp_peek (void *buf, size_t len)
 Read resource data. More...
 
static int isapnp_find_tag (unsigned int wanted_tag, void *buf, size_t len)
 Find a tag within the resource data. More...
 
static int isapnp_find_logdevid (unsigned int logdev, struct isapnp_logdevid *logdevid)
 Find specified Logical Device ID tag. More...
 
static int isapnp_try_isolate (void)
 Try isolating ISAPnP cards at the current read port. More...
 
static void isapnp_isolate (void)
 Find a valid read port and isolate all ISAPnP cards. More...
 
void isapnp_device_activation (struct isapnp_device *isapnp, int activation)
 Activate or deactivate an ISAPnP device. More...
 
static int isapnp_probe (struct isapnp_device *isapnp)
 Probe an ISAPnP device. More...
 
static void isapnp_remove (struct isapnp_device *isapnp)
 Remove an ISAPnP device. More...
 
static int isapnpbus_probe (struct root_device *rootdev)
 Probe ISAPnP root bus. More...
 

Variables

uint16_t isapnp_read_port
 ISAPnP Read Port address. More...
 
static struct root_driver isapnp_root_driver
 ISAPnP bus root device driver. More...
 
struct root_device isapnp_root_device __root_device
 ISAPnP bus root device. More...
 

Detailed Description

ISAPnP bus support.

Etherboot orignally gained ISAPnP support in a very limited way for the 3c515 NIC. The current implementation is almost a complete rewrite based on the ISAPnP specification, with passing reference to the Linux ISAPnP code.

There can be only one ISAPnP bus in a system. Once the read port is known and all cards have been allocated CSNs, there's nothing to be gained by re-scanning for cards.

External code (e.g. the ISAPnP ROM prefix) may already know the read port address, in which case it can store it in isapnp_read_port. Note that setting the read port address in this way will prevent further isolation from taking place; you should set the read port address only if you know that devices have already been allocated CSNs.

Definition in file isapnp.c.

Macro Definition Documentation

◆ ISAPNP_CARD_ID_FMT

#define ISAPNP_CARD_ID_FMT   "ID %04x:%04x (\"%s\") serial %x"

Definition at line 85 of file isapnp.c.

◆ ISAPNP_CARD_ID_DATA

#define ISAPNP_CARD_ID_DATA (   identifier)
Value:
(identifier)->vendor_id, (identifier)->prod_id, \
isa_id_string ( (identifier)->vendor_id, (identifier)->prod_id ), \
(identifier)->serial
uint16_t prod_id
Product ID to be assumed for this device.
Definition: isa.h:44
uint8_t vendor_id[3]
Definition: ib_mad.h:22
uint64_t serial
Serial number.
Definition: edd.h:30

Definition at line 86 of file isapnp.c.

◆ ISAPNP_DEV_ID_FMT

#define ISAPNP_DEV_ID_FMT   "ID %04x:%04x (\"%s\")"

Definition at line 90 of file isapnp.c.

◆ ISAPNP_DEV_ID_DATA

#define ISAPNP_DEV_ID_DATA (   isapnp)
Value:
(isapnp)->vendor_id, (isapnp)->prod_id, \
isa_id_string ( (isapnp)->vendor_id, (isapnp)->prod_id )
uint16_t prod_id
Product ID to be assumed for this device.
Definition: isa.h:44
uint8_t vendor_id[3]
Definition: ib_mad.h:22

Definition at line 91 of file isapnp.c.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER  )

◆ isapnpbus_remove()

static void isapnpbus_remove ( struct root_device rootdev)
static

Remove ISAPnP root bus.

Parameters
rootdevISAPnP bus root device

Definition at line 734 of file isapnp.c.

734  {
735  struct isapnp_device *isapnp;
736  struct isapnp_device *tmp;
737 
738  list_for_each_entry_safe ( isapnp, tmp, &rootdev->dev.children,
739  dev.siblings ) {
740  isapnp_remove ( isapnp );
741  list_del ( &isapnp->dev.siblings );
742  free ( isapnp );
743  }
744 }
struct device dev
Generic device.
Definition: isapnp.h:185
struct device dev
Device chain.
Definition: device.h:99
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
#define list_for_each_entry_safe(pos, tmp, head, member)
Iterate over entries in a list, safe against deletion of the current entry.
Definition: list.h:447
An ISAPnP device.
Definition: isapnp.h:183
static void(* free)(struct refcnt *refcnt))
Definition: refcnt.h:54
struct list_head siblings
Devices on the same bus.
Definition: device.h:81
uint8_t * tmp
Definition: entropy.h:156
struct list_head children
Devices attached to this device.
Definition: device.h:83
static void isapnp_remove(struct isapnp_device *isapnp)
Remove an ISAPnP device.
Definition: isapnp.c:623

References device::children, root_device::dev, isapnp_device::dev, free, isapnp_remove(), list_del, list_for_each_entry_safe, device::siblings, and tmp.

Referenced by isapnpbus_probe().

◆ isapnp_write_address()

static void isapnp_write_address ( unsigned int  address)
inlinestatic

Definition at line 95 of file isapnp.c.

95  {
97 }
uint64_t address
Base address.
Definition: ena.h:24
#define ISAPNP_ADDRESS
Definition: isapnp.h:57
#define outb(data, io_addr)
Definition: io.h:309

References address, ISAPNP_ADDRESS, and outb.

Referenced by isapnp_read_byte(), isapnp_send_key(), isapnp_serialisolation(), and isapnp_write_byte().

◆ isapnp_write_data()

static void isapnp_write_data ( unsigned int  data)
inlinestatic

Definition at line 99 of file isapnp.c.

99  {
101 }
#define ISAPNP_WRITE_DATA
Definition: isapnp.h:58
#define outb(data, io_addr)
Definition: io.h:309
struct arbelprm_port_state_change_st data
Message.
Definition: arbel.h:12

References data, ISAPNP_WRITE_DATA, and outb.

Referenced by isapnp_write_byte().

◆ isapnp_read_data()

static unsigned int isapnp_read_data ( void  )
inlinestatic

Definition at line 103 of file isapnp.c.

103  {
104  return inb ( isapnp_read_port );
105 }
uint16_t isapnp_read_port
ISAPnP Read Port address.
Definition: isapnp.c:76
uint8_t inb(volatile uint8_t *io_addr)
Read byte from I/O-mapped device.

References inb(), and isapnp_read_port.

Referenced by isapnp_read_byte(), and isapnp_try_isolate().

◆ isapnp_write_byte()

static void isapnp_write_byte ( unsigned int  address,
unsigned int  value 
)
inlinestatic

Definition at line 107 of file isapnp.c.

108  {
111 }
static void isapnp_write_address(unsigned int address)
Definition: isapnp.c:95
uint64_t address
Base address.
Definition: ena.h:24
pseudo_bit_t value[0x00020]
Definition: arbel.h:13
static void isapnp_write_data(unsigned int data)
Definition: isapnp.c:99

References address, isapnp_write_address(), isapnp_write_data(), and value.

Referenced by isapnp_activate(), isapnp_deactivate(), isapnp_logicaldevice(), isapnp_reset_csn(), isapnp_set_read_port(), isapnp_wait_for_key(), isapnp_wake(), and isapnp_write_csn().

◆ isapnp_read_byte()

static unsigned int isapnp_read_byte ( unsigned int  address)
inlinestatic

Definition at line 113 of file isapnp.c.

113  {
115  return isapnp_read_data ();
116 }
static void isapnp_write_address(unsigned int address)
Definition: isapnp.c:95
uint64_t address
Base address.
Definition: ena.h:24
static unsigned int isapnp_read_data(void)
Definition: isapnp.c:103

References address, isapnp_read_data(), and isapnp_write_address().

Referenced by isapnp_read_irqno(), isapnp_read_resourcedata(), isapnp_read_status(), and isapnp_read_word().

◆ isapnp_read_word()

static unsigned int isapnp_read_word ( unsigned int  address)
inlinestatic

Definition at line 118 of file isapnp.c.

118  {
119  /* Yes, they're in big-endian order */
120  return ( ( isapnp_read_byte ( address ) << 8 )
121  | isapnp_read_byte ( address + 1 ) );
122 }
uint64_t address
Base address.
Definition: ena.h:24
static unsigned int isapnp_read_byte(unsigned int address)
Definition: isapnp.c:113

References address, and isapnp_read_byte().

Referenced by isapnp_read_iobase().

◆ isapnp_set_read_port()

static void isapnp_set_read_port ( void  )
inlinestatic

Inform cards of a new read port address.

Definition at line 125 of file isapnp.c.

125  {
127 }
#define ISAPNP_READPORT
Definition: isapnp.h:79
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
uint16_t isapnp_read_port
ISAPnP Read Port address.
Definition: isapnp.c:76

References isapnp_read_port, ISAPNP_READPORT, and isapnp_write_byte().

Referenced by isapnp_try_isolate().

◆ isapnp_serialisolation()

static void isapnp_serialisolation ( void  )
inlinestatic

Enter the Isolation state.

Only cards currently in the Sleep state will respond to this command.

Definition at line 135 of file isapnp.c.

135  {
137 }
static void isapnp_write_address(unsigned int address)
Definition: isapnp.c:95
#define ISAPNP_SERIALISOLATION
Definition: isapnp.h:80

References ISAPNP_SERIALISOLATION, and isapnp_write_address().

Referenced by isapnp_try_isolate().

◆ isapnp_wait_for_key()

static void isapnp_wait_for_key ( void  )
inlinestatic

Enter the Wait for Key state.

All cards will respond to this command, regardless of their current state.

Definition at line 145 of file isapnp.c.

145  {
147 }
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
#define ISAPNP_CONFIGCONTROL
Definition: isapnp.h:81
#define ISAPNP_CONFIG_WAIT_FOR_KEY
Definition: isapnp.h:95

References ISAPNP_CONFIG_WAIT_FOR_KEY, ISAPNP_CONFIGCONTROL, and isapnp_write_byte().

Referenced by isapnp_device_activation(), isapnp_try_isolate(), and isapnpbus_probe().

◆ isapnp_reset_csn()

static void isapnp_reset_csn ( void  )
inlinestatic

Reset (i.e.

remove) Card Select Number.

Only cards currently in the Sleep state will respond to this command.

Definition at line 155 of file isapnp.c.

155  {
157 }
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
#define ISAPNP_CONFIGCONTROL
Definition: isapnp.h:81
#define ISAPNP_CONFIG_RESET_CSN
Definition: isapnp.h:96

References ISAPNP_CONFIG_RESET_CSN, ISAPNP_CONFIGCONTROL, and isapnp_write_byte().

Referenced by isapnp_try_isolate().

◆ isapnp_wake()

static void isapnp_wake ( uint8_t  csn)
inlinestatic

Place a specified card into the Config state.

Parameters
csnCard Select Number
Return values
None-
Exceptions
None-

Only cards currently in the Sleep, Isolation, or Config states will respond to this command. The card that has the specified CSN will enter the Config state, all other cards will enter the Sleep state.

Definition at line 170 of file isapnp.c.

170  {
172 }
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
#define ISAPNP_WAKE
Definition: isapnp.h:82
uint8_t csn
Card Select Number.
Definition: isapnp.h:195

References ISAPNP_WAKE, and isapnp_write_byte().

Referenced by isapnp_device_activation(), isapnp_try_isolate(), and isapnpbus_probe().

◆ isapnp_read_resourcedata()

static unsigned int isapnp_read_resourcedata ( void  )
inlinestatic

Definition at line 174 of file isapnp.c.

174  {
176 }
#define ISAPNP_RESOURCEDATA
Definition: isapnp.h:83
static unsigned int isapnp_read_byte(unsigned int address)
Definition: isapnp.c:113

References isapnp_read_byte(), and ISAPNP_RESOURCEDATA.

Referenced by isapnp_peek_byte().

◆ isapnp_read_status()

static unsigned int isapnp_read_status ( void  )
inlinestatic

Definition at line 178 of file isapnp.c.

178  {
179  return isapnp_read_byte ( ISAPNP_STATUS );
180 }
#define ISAPNP_STATUS
Definition: isapnp.h:84
static unsigned int isapnp_read_byte(unsigned int address)
Definition: isapnp.c:113

References isapnp_read_byte(), and ISAPNP_STATUS.

Referenced by isapnp_peek_byte().

◆ isapnp_write_csn()

static void isapnp_write_csn ( unsigned int  csn)
inlinestatic

Assign a Card Select Number to a card, and enter the Config state.

Parameters
csnCard Select Number

Only cards in the Isolation state will respond to this command. The isolation protocol is designed so that only one card will remain in the Isolation state by the time the isolation protocol completes.

Definition at line 192 of file isapnp.c.

192  {
194 }
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
#define ISAPNP_CARDSELECTNUMBER
Definition: isapnp.h:85
uint8_t csn
Card Select Number.
Definition: isapnp.h:195

References ISAPNP_CARDSELECTNUMBER, and isapnp_write_byte().

Referenced by isapnp_try_isolate().

◆ isapnp_logicaldevice()

static void isapnp_logicaldevice ( unsigned int  logdev)
inlinestatic

Definition at line 196 of file isapnp.c.

196  {
198 }
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
#define ISAPNP_LOGICALDEVICENUMBER
Definition: isapnp.h:86
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197

References ISAPNP_LOGICALDEVICENUMBER, and isapnp_write_byte().

Referenced by isapnp_activate(), isapnp_deactivate(), isapnp_device_activation(), and isapnpbus_probe().

◆ isapnp_activate()

static void isapnp_activate ( unsigned int  logdev)
inlinestatic

Definition at line 200 of file isapnp.c.

200  {
203 }
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
#define ISAPNP_ACTIVATE
Definition: isapnp.h:87
static void isapnp_logicaldevice(unsigned int logdev)
Definition: isapnp.c:196
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197

References ISAPNP_ACTIVATE, isapnp_logicaldevice(), and isapnp_write_byte().

Referenced by isapnp_device_activation().

◆ isapnp_deactivate()

static void isapnp_deactivate ( unsigned int  logdev)
inlinestatic

Definition at line 205 of file isapnp.c.

205  {
208 }
static void isapnp_write_byte(unsigned int address, unsigned int value)
Definition: isapnp.c:107
#define ISAPNP_ACTIVATE
Definition: isapnp.h:87
static void isapnp_logicaldevice(unsigned int logdev)
Definition: isapnp.c:196
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197

References ISAPNP_ACTIVATE, isapnp_logicaldevice(), and isapnp_write_byte().

◆ isapnp_read_iobase()

static unsigned int isapnp_read_iobase ( unsigned int  index)
inlinestatic

Definition at line 210 of file isapnp.c.

210  {
211  return isapnp_read_word ( ISAPNP_IOBASE ( index ) );
212 }
static unsigned int isapnp_read_word(unsigned int address)
Definition: isapnp.c:118
#define ISAPNP_IOBASE(n)
Definition: isapnp.h:89
uint64_t index
Index of the first segment within the content.
Definition: pccrc.h:21

References index, ISAPNP_IOBASE, and isapnp_read_word().

Referenced by isapnpbus_probe().

◆ isapnp_read_irqno()

static unsigned int isapnp_read_irqno ( unsigned int  index)
inlinestatic

Definition at line 214 of file isapnp.c.

214  {
215  return isapnp_read_byte ( ISAPNP_IRQNO ( index ) );
216 }
static unsigned int isapnp_read_byte(unsigned int address)
Definition: isapnp.c:113
#define ISAPNP_IRQNO(n)
Definition: isapnp.h:90
uint64_t index
Index of the first segment within the content.
Definition: pccrc.h:21

References index, ISAPNP_IRQNO, and isapnp_read_byte().

Referenced by isapnpbus_probe().

◆ isapnp_delay()

static void isapnp_delay ( void  )
static

Definition at line 218 of file isapnp.c.

218  {
219  udelay ( 1000 );
220 }
void udelay(unsigned long usecs)
Delay for a fixed number of microseconds.
Definition: timer.c:60

References udelay().

Referenced by isapnp_device_activation(), isapnp_peek_byte(), isapnp_send_key(), and isapnp_try_isolate().

◆ isapnp_lfsr_next()

static unsigned int isapnp_lfsr_next ( unsigned int  lfsr,
unsigned int  input_bit 
)
inlinestatic

Linear feedback shift register.

Parameters
lfsrCurrent value of the LFSR
input_bitCurrent input bit to the LFSR
Return values
lfsrNext value of the LFSR

This routine implements the linear feedback shift register as described in Appendix B of the PnP ISA spec. The hardware implementation uses eight D-type latches and two XOR gates. I think this is probably the smallest possible implementation in software. Six instructions when input_bit is a constant 0 (for isapnp_send_key). :)

Definition at line 236 of file isapnp.c.

237  {
238  register uint8_t lfsr_next;
239 
240  lfsr_next = lfsr >> 1;
241  lfsr_next |= ( ( ( lfsr ^ lfsr_next ) ^ input_bit ) ) << 7;
242  return lfsr_next;
243 }
unsigned char uint8_t
Definition: stdint.h:10

Referenced by isapnp_checksum(), and isapnp_send_key().

◆ isapnp_send_key()

static void isapnp_send_key ( void  )
static

Send the ISAPnP initiation key.

Sending the key causes all ISAPnP cards that are currently in the Wait for Key state to transition into the Sleep state.

Definition at line 251 of file isapnp.c.

251  {
252  unsigned int i;
253  unsigned int lfsr;
254 
255  isapnp_delay();
256  isapnp_write_address ( 0x00 );
257  isapnp_write_address ( 0x00 );
258 
259  lfsr = ISAPNP_LFSR_SEED;
260  for ( i = 0 ; i < 32 ; i++ ) {
261  isapnp_write_address ( lfsr );
262  lfsr = isapnp_lfsr_next ( lfsr, 0 );
263  }
264 }
static void isapnp_write_address(unsigned int address)
Definition: isapnp.c:95
static void isapnp_delay(void)
Definition: isapnp.c:218
#define ISAPNP_LFSR_SEED
Definition: isapnp.h:102
static unsigned int isapnp_lfsr_next(unsigned int lfsr, unsigned int input_bit)
Linear feedback shift register.
Definition: isapnp.c:236

References isapnp_delay(), isapnp_lfsr_next(), ISAPNP_LFSR_SEED, and isapnp_write_address().

Referenced by isapnp_device_activation(), isapnp_try_isolate(), and isapnpbus_probe().

◆ isapnp_checksum()

static unsigned int isapnp_checksum ( struct isapnp_identifier identifier)
static

Compute ISAPnP identifier checksum.

Parameters
identifierISAPnP identifier
Return values
checksumExpected checksum value

Definition at line 272 of file isapnp.c.

272  {
273  unsigned int i, j;
274  unsigned int lfsr;
275  unsigned int byte;
276 
277  lfsr = ISAPNP_LFSR_SEED;
278  for ( i = 0 ; i < 8 ; i++ ) {
279  byte = * ( ( ( uint8_t * ) identifier ) + i );
280  for ( j = 0 ; j < 8 ; j++ ) {
281  lfsr = isapnp_lfsr_next ( lfsr, byte );
282  byte >>= 1;
283  }
284  }
285  return lfsr;
286 }
unsigned char uint8_t
Definition: stdint.h:10
unsigned char byte
Definition: smc9000.h:38
#define ISAPNP_LFSR_SEED
Definition: isapnp.h:102
static unsigned int isapnp_lfsr_next(unsigned int lfsr, unsigned int input_bit)
Linear feedback shift register.
Definition: isapnp.c:236

References isapnp_lfsr_next(), and ISAPNP_LFSR_SEED.

Referenced by isapnp_try_isolate().

◆ isapnp_peek_byte()

static unsigned int isapnp_peek_byte ( void  )
inlinestatic

Definition at line 293 of file isapnp.c.

293  {
294  unsigned int i;
295 
296  /* Wait for data to be ready */
297  for ( i = 0 ; i < 20 ; i++ ) {
298  if ( isapnp_read_status() & 0x01 ) {
299  /* Byte ready - read it */
300  return isapnp_read_resourcedata();
301  }
302  isapnp_delay();
303  }
304  /* Data never became ready - return 0xff */
305  return 0xff;
306 }
static unsigned int isapnp_read_status(void)
Definition: isapnp.c:178
static unsigned int isapnp_read_resourcedata(void)
Definition: isapnp.c:174
static void isapnp_delay(void)
Definition: isapnp.c:218

References isapnp_delay(), isapnp_read_resourcedata(), and isapnp_read_status().

Referenced by isapnp_find_tag(), and isapnp_peek().

◆ isapnp_peek()

static void isapnp_peek ( void *  buf,
size_t  len 
)
static

Read resource data.

Parameters
bufBuffer in which to store data, or NULL
bytesNumber of bytes to read

Resource data is read from the current location. If #buf is NULL, the data is discarded.

Definition at line 317 of file isapnp.c.

317  {
318  unsigned int i;
319  unsigned int byte;
320 
321  for ( i = 0 ; i < len ; i++) {
322  byte = isapnp_peek_byte();
323  if ( buf )
324  * ( ( uint8_t * ) buf + i ) = byte;
325  }
326 }
static unsigned int isapnp_peek_byte(void)
Definition: isapnp.c:293
unsigned char uint8_t
Definition: stdint.h:10
unsigned char byte
Definition: smc9000.h:38
uint32_t len
Length.
Definition: ena.h:14

References isapnp_peek_byte(), and len.

Referenced by isapnp_find_tag(), and isapnpbus_probe().

◆ isapnp_find_tag()

static int isapnp_find_tag ( unsigned int  wanted_tag,
void *  buf,
size_t  len 
)
static

Find a tag within the resource data.

Parameters
wanted_tagThe tag that we're looking for
bufBuffer in which to store the tag's contents
lenLength of buffer
Return values
rcReturn status code

Scan through the resource data until we find a particular tag, and read its contents into a buffer.

Definition at line 339 of file isapnp.c.

339  {
340  unsigned int tag;
341  unsigned int tag_len;
342 
343  DBG2 ( "ISAPnP read tag" );
344  do {
345  tag = isapnp_peek_byte();
346  if ( ISAPNP_IS_SMALL_TAG ( tag ) ) {
347  tag_len = ISAPNP_SMALL_TAG_LEN ( tag );
349  } else {
350  tag_len = ( isapnp_peek_byte() +
351  ( isapnp_peek_byte() << 8 ) );
353  }
354  DBG2 ( " %02x (%02x)", tag, tag_len );
355  if ( tag == wanted_tag ) {
356  if ( len > tag_len )
357  len = tag_len;
358  isapnp_peek ( buf, len );
359  DBG2 ( "\n" );
360  return 0;
361  } else {
362  isapnp_peek ( NULL, tag_len );
363  }
364  } while ( tag != ISAPNP_TAG_END );
365  DBG2 ( "\n" );
366  return -ENOENT;
367 }
static unsigned int isapnp_peek_byte(void)
Definition: isapnp.c:293
#define ISAPNP_TAG_END
Definition: isapnp.h:122
#define ISAPNP_SMALL_TAG_NAME(tag)
Definition: isapnp.h:106
#define ENOENT
No such file or directory.
Definition: errno.h:514
#define ISAPNP_SMALL_TAG_LEN(tag)
Definition: isapnp.h:107
#define ISAPNP_LARGE_TAG_NAME(tag)
Definition: isapnp.h:125
#define ISAPNP_IS_SMALL_TAG(tag)
Definition: isapnp.h:105
static void isapnp_peek(void *buf, size_t len)
Read resource data.
Definition: isapnp.c:317
uint32_t len
Length.
Definition: ena.h:14
uint64_t tag
Identity tag.
Definition: edd.h:30
#define NULL
NULL pointer (VOID *)
Definition: Base.h:362
#define DBG2(...)
Definition: compiler.h:515

References DBG2, ENOENT, ISAPNP_IS_SMALL_TAG, ISAPNP_LARGE_TAG_NAME, isapnp_peek(), isapnp_peek_byte(), ISAPNP_SMALL_TAG_LEN, ISAPNP_SMALL_TAG_NAME, ISAPNP_TAG_END, len, NULL, and tag.

Referenced by isapnp_find_logdevid().

◆ isapnp_find_logdevid()

static int isapnp_find_logdevid ( unsigned int  logdev,
struct isapnp_logdevid logdevid 
)
static

Find specified Logical Device ID tag.

Parameters
logdevLogical device ID
logdevidLogical device ID structure to fill in
Return values
rcReturn status code

Definition at line 376 of file isapnp.c.

377  {
378  unsigned int i;
379  int rc;
380 
381  for ( i = 0 ; i <= logdev ; i++ ) {
382  if ( ( rc = isapnp_find_tag ( ISAPNP_TAG_LOGDEVID, logdevid,
383  sizeof ( *logdevid ) ) ) != 0 )
384  return rc;
385  }
386  return 0;
387 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
#define ISAPNP_TAG_LOGDEVID
Definition: isapnp.h:109
static int isapnp_find_tag(unsigned int wanted_tag, void *buf, size_t len)
Find a tag within the resource data.
Definition: isapnp.c:339
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197

References isapnp_find_tag(), ISAPNP_TAG_LOGDEVID, and rc.

Referenced by isapnpbus_probe().

◆ isapnp_try_isolate()

static int isapnp_try_isolate ( void  )
static

Try isolating ISAPnP cards at the current read port.

Return values

Definition at line 400 of file isapnp.c.

400  {
401  struct isapnp_identifier identifier;
402  unsigned int i, j;
403  unsigned int seen_55aa, seen_life;
404  unsigned int csn = 0;
405  unsigned int data;
406  unsigned int byte;
407 
408  DBG ( "ISAPnP attempting isolation at read port %04x\n",
410 
411  /* Place all cards into the Sleep state, whatever state
412  * they're currently in.
413  */
415  isapnp_send_key();
416 
417  /* Reset all assigned CSNs */
419  isapnp_delay();
420  isapnp_delay();
421 
422  /* Place all cards into the Isolation state */
424  isapnp_send_key();
425  isapnp_wake ( 0x00 );
426 
427  /* Set the read port */
429  isapnp_delay();
430 
431  while ( 1 ) {
432 
433  /* All cards that do not have assigned CSNs are
434  * currently in the Isolation state, each time we go
435  * through this loop.
436  */
437 
438  /* Initiate serial isolation */
440  isapnp_delay();
441 
442  /* Read identifier serially via the ISAPnP read port. */
443  memset ( &identifier, 0, sizeof ( identifier ) );
444  seen_55aa = seen_life = 0;
445  for ( i = 0 ; i < 9 ; i++ ) {
446  byte = 0;
447  for ( j = 0 ; j < 8 ; j++ ) {
449  isapnp_delay();
450  data = ( ( data << 8 ) | isapnp_read_data() );
451  isapnp_delay();
452  byte >>= 1;
453  if ( data != 0xffff ) {
454  seen_life++;
455  if ( data == 0x55aa ) {
456  byte |= 0x80;
457  seen_55aa++;
458  }
459  }
460  }
461  *( ( ( uint8_t * ) &identifier ) + i ) = byte;
462  }
463 
464  /* If we didn't see any 55aa patterns, stop here */
465  if ( ! seen_55aa ) {
466  if ( csn ) {
467  DBG ( "ISAPnP found no more cards\n" );
468  } else {
469  if ( seen_life ) {
470  DBG ( "ISAPnP saw life but no cards, "
471  "trying new read port\n" );
472  csn = -1;
473  } else {
474  DBG ( "ISAPnP saw no signs of life, "
475  "abandoning isolation\n" );
476  }
477  }
478  break;
479  }
480 
481  /* If the checksum was invalid stop here */
482  if ( identifier.checksum != isapnp_checksum ( &identifier) ) {
483  DBG ( "ISAPnP found malformed card "
484  ISAPNP_CARD_ID_FMT "\n with checksum %02x "
485  "(should be %02x), trying new read port\n",
486  ISAPNP_CARD_ID_DATA ( &identifier ),
487  identifier.checksum,
488  isapnp_checksum ( &identifier) );
489  csn = -1;
490  break;
491  }
492 
493  /* Give the device a CSN */
494  csn++;
495  DBG ( "ISAPnP found card " ISAPNP_CARD_ID_FMT
496  ", assigning CSN %02x\n",
497  ISAPNP_CARD_ID_DATA ( &identifier ), csn );
498 
499  isapnp_write_csn ( csn );
500  isapnp_delay();
501 
502  /* Send this card back to Sleep and force all cards
503  * without a CSN into Isolation state
504  */
505  isapnp_wake ( 0x00 );
506  isapnp_delay();
507  }
508 
509  /* Place all cards in Wait for Key state */
511 
512  /* Return number of cards found */
513  if ( csn > 0 ) {
514  DBG ( "ISAPnP found %d cards at read port %04x\n",
515  csn, isapnp_read_port );
516  }
517  return csn;
518 }
static void isapnp_wake(uint8_t csn)
Place a specified card into the Config state.
Definition: isapnp.c:170
#define ISAPNP_CARD_ID_DATA(identifier)
Definition: isapnp.c:86
#define ISAPNP_CARD_ID_FMT
Definition: isapnp.c:85
static void isapnp_set_read_port(void)
Inform cards of a new read port address.
Definition: isapnp.c:125
static void isapnp_reset_csn(void)
Reset (i.e.
Definition: isapnp.c:155
static unsigned int isapnp_read_data(void)
Definition: isapnp.c:103
static void isapnp_delay(void)
Definition: isapnp.c:218
uint16_t isapnp_read_port
ISAPnP Read Port address.
Definition: isapnp.c:76
unsigned char uint8_t
Definition: stdint.h:10
unsigned char byte
Definition: smc9000.h:38
static void isapnp_write_csn(unsigned int csn)
Assign a Card Select Number to a card, and enter the Config state.
Definition: isapnp.c:192
static void isapnp_serialisolation(void)
Enter the Isolation state.
Definition: isapnp.c:135
static void isapnp_wait_for_key(void)
Enter the Wait for Key state.
Definition: isapnp.c:145
An ISAPnP serial identifier.
Definition: isapnp.h:151
static unsigned int isapnp_checksum(struct isapnp_identifier *identifier)
Compute ISAPnP identifier checksum.
Definition: isapnp.c:272
static void isapnp_send_key(void)
Send the ISAPnP initiation key.
Definition: isapnp.c:251
struct arbelprm_port_state_change_st data
Message.
Definition: arbel.h:12
#define DBG(...)
Print a debugging message.
Definition: compiler.h:498
void * memset(void *dest, int character, size_t len) __nonnull

References isapnp_identifier::checksum, data, DBG, ISAPNP_CARD_ID_DATA, ISAPNP_CARD_ID_FMT, isapnp_checksum(), isapnp_delay(), isapnp_read_data(), isapnp_read_port, isapnp_reset_csn(), isapnp_send_key(), isapnp_serialisolation(), isapnp_set_read_port(), isapnp_wait_for_key(), isapnp_wake(), isapnp_write_csn(), and memset().

Referenced by isapnp_isolate().

◆ isapnp_isolate()

static void isapnp_isolate ( void  )
static

Find a valid read port and isolate all ISAPnP cards.

Definition at line 524 of file isapnp.c.

524  {
528  /* Avoid problematic locations such as the NE2000
529  * probe space
530  */
531  if ( ( isapnp_read_port >= 0x280 ) &&
532  ( isapnp_read_port <= 0x380 ) )
533  continue;
534 
535  /* If we detect any ISAPnP cards at this location, stop */
536  if ( isapnp_try_isolate() >= 0 )
537  return;
538  }
539 }
#define ISAPNP_READ_PORT_MAX
Definition: isapnp.h:65
static int isapnp_try_isolate(void)
Try isolating ISAPnP cards at the current read port.
Definition: isapnp.c:400
#define ISAPNP_READ_PORT_START
Definition: isapnp.h:60
uint16_t isapnp_read_port
ISAPnP Read Port address.
Definition: isapnp.c:76
#define ISAPNP_READ_PORT_STEP
Definition: isapnp.h:66

References isapnp_read_port, ISAPNP_READ_PORT_MAX, ISAPNP_READ_PORT_START, ISAPNP_READ_PORT_STEP, and isapnp_try_isolate().

Referenced by isapnpbus_probe().

◆ isapnp_device_activation()

void isapnp_device_activation ( struct isapnp_device isapnp,
int  activation 
)

Activate or deactivate an ISAPnP device.

Parameters
isapnpISAPnP device
activationTrue to enable, False to disable the device
Return values
None-
Exceptions
None-

This routine simply activates the device in its current configuration, or deactivates the device. It does not attempt any kind of resource arbitration.

Definition at line 554 of file isapnp.c.

555  {
556  /* Wake the card and select the logical device */
558  isapnp_send_key ();
559  isapnp_wake ( isapnp->csn );
560  isapnp_logicaldevice ( isapnp->logdev );
561 
562  /* Activate/deactivate the logical device */
563  isapnp_activate ( activation );
564  isapnp_delay();
565 
566  /* Return all cards to Wait for Key state */
568 
569  DBG ( "ISAPnP %s device %02x:%02x\n",
570  ( activation ? "activated" : "deactivated" ),
571  isapnp->csn, isapnp->logdev );
572 }
static void isapnp_wake(uint8_t csn)
Place a specified card into the Config state.
Definition: isapnp.c:170
static void isapnp_delay(void)
Definition: isapnp.c:218
static void isapnp_logicaldevice(unsigned int logdev)
Definition: isapnp.c:196
static void isapnp_wait_for_key(void)
Enter the Wait for Key state.
Definition: isapnp.c:145
static void isapnp_send_key(void)
Send the ISAPnP initiation key.
Definition: isapnp.c:251
uint8_t csn
Card Select Number.
Definition: isapnp.h:195
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197
static void isapnp_activate(unsigned int logdev)
Definition: isapnp.c:200
#define DBG(...)
Print a debugging message.
Definition: compiler.h:498

References isapnp_device::csn, DBG, isapnp_activate(), isapnp_delay(), isapnp_logicaldevice(), isapnp_send_key(), isapnp_wait_for_key(), isapnp_wake(), and isapnp_device::logdev.

Referenced by activate_isapnp_device(), and deactivate_isapnp_device().

◆ isapnp_probe()

static int isapnp_probe ( struct isapnp_device isapnp)
static

Probe an ISAPnP device.

Parameters
isapnpISAPnP device
Return values
rcReturn status code

Searches for a driver for the ISAPnP device. If a driver is found, its probe() routine is called.

Definition at line 583 of file isapnp.c.

583  {
584  struct isapnp_driver *driver;
585  struct isapnp_device_id *id;
586  unsigned int i;
587  int rc;
588 
589  DBG ( "Adding ISAPnP device %02x:%02x (%04x:%04x (\"%s\") "
590  "io %x irq %d)\n", isapnp->csn, isapnp->logdev,
591  isapnp->vendor_id, isapnp->prod_id,
592  isa_id_string ( isapnp->vendor_id, isapnp->prod_id ),
593  isapnp->ioaddr, isapnp->irqno );
594 
596  for ( i = 0 ; i < driver->id_count ; i++ ) {
597  id = &driver->ids[i];
598  if ( id->vendor_id != isapnp->vendor_id )
599  continue;
600  if ( ISA_PROD_ID ( id->prod_id ) !=
601  ISA_PROD_ID ( isapnp->prod_id ) )
602  continue;
603  isapnp->driver = driver;
604  isapnp->dev.driver_name = id->name;
605  DBG ( "...using driver %s\n", isapnp->dev.driver_name );
606  if ( ( rc = driver->probe ( isapnp, id ) ) != 0 ) {
607  DBG ( "......probe failed\n" );
608  continue;
609  }
610  return 0;
611  }
612  }
613 
614  DBG ( "...no driver found\n" );
615  return -ENOTTY;
616 }
struct device dev
Generic device.
Definition: isapnp.h:185
int(* probe)(struct isapnp_device *isapnp, const struct isapnp_device_id *id)
Probe device.
Definition: isapnp.h:221
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
unsigned int id_count
Number of entries in ISAPnP ID table.
Definition: isapnp.h:213
An ISAPnP driver.
Definition: isapnp.h:209
uint16_t vendor_id
Vendor ID.
Definition: isapnp.h:187
An ISAPnP device ID list entry.
Definition: isapnp.h:173
uint16_t ioaddr
I/O address.
Definition: isapnp.h:191
char * isa_id_string(unsigned int vendor, unsigned int product)
Definition: isa_ids.c:11
struct isapnp_device_id * ids
ISAPnP ID table.
Definition: isapnp.h:211
uint16_t prod_id
Product ID.
Definition: isapnp.h:189
struct isapnp_driver * driver
Driver for this device.
Definition: isapnp.h:199
const char * driver_name
Driver name.
Definition: device.h:77
uint8_t id
Request identifier.
Definition: ena.h:12
#define for_each_table_entry(pointer, table)
Iterate through all entries within a linker table.
Definition: tables.h:358
#define ISAPNP_DRIVERS
ISAPnP driver table.
Definition: isapnp.h:232
uint8_t irqno
Interrupt number.
Definition: isapnp.h:193
#define ISA_PROD_ID(product)
Definition: isa_ids.h:45
#define ENOTTY
Inappropriate I/O control operation.
Definition: errno.h:594
uint8_t csn
Card Select Number.
Definition: isapnp.h:195
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197
#define DBG(...)
Print a debugging message.
Definition: compiler.h:498

References isapnp_device::csn, DBG, isapnp_device::dev, isapnp_device::driver, device::driver_name, ENOTTY, for_each_table_entry, id, isapnp_driver::id_count, isapnp_driver::ids, isapnp_device::ioaddr, isapnp_device::irqno, isa_id_string(), ISA_PROD_ID, ISAPNP_DRIVERS, isapnp_device::logdev, isapnp_driver::probe, isapnp_device::prod_id, rc, and isapnp_device::vendor_id.

Referenced by isapnpbus_probe().

◆ isapnp_remove()

static void isapnp_remove ( struct isapnp_device isapnp)
static

Remove an ISAPnP device.

Parameters
isapnpISAPnP device

Definition at line 623 of file isapnp.c.

623  {
624  isapnp->driver->remove ( isapnp );
625  DBG ( "Removed ISAPnP device %02x:%02x\n",
626  isapnp->csn, isapnp->logdev );
627 }
void(* remove)(struct isapnp_device *isapnp)
Remove device.
Definition: isapnp.h:228
struct isapnp_driver * driver
Driver for this device.
Definition: isapnp.h:199
uint8_t csn
Card Select Number.
Definition: isapnp.h:195
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197
#define DBG(...)
Print a debugging message.
Definition: compiler.h:498

References isapnp_device::csn, DBG, isapnp_device::driver, isapnp_device::logdev, and isapnp_driver::remove.

Referenced by isapnpbus_remove().

◆ isapnpbus_probe()

static int isapnpbus_probe ( struct root_device rootdev)
static

Probe ISAPnP root bus.

Parameters
rootdevISAPnP bus root device

Scans the ISAPnP bus for devices and registers all devices it can find.

Definition at line 637 of file isapnp.c.

637  {
638  struct isapnp_device *isapnp = NULL;
639  struct isapnp_identifier identifier;
640  struct isapnp_logdevid logdevid;
641  unsigned int csn;
642  unsigned int logdev;
643  int rc;
644 
645  /* Perform isolation if it hasn't yet been done */
646  if ( ! isapnp_read_port )
647  isapnp_isolate();
648 
649  for ( csn = 1 ; csn <= 0xff ; csn++ ) {
650  for ( logdev = 0 ; logdev <= 0xff ; logdev++ ) {
651 
652  /* Allocate struct isapnp_device */
653  if ( ! isapnp )
654  isapnp = malloc ( sizeof ( *isapnp ) );
655  if ( ! isapnp ) {
656  rc = -ENOMEM;
657  goto err;
658  }
659  memset ( isapnp, 0, sizeof ( *isapnp ) );
660  isapnp->csn = csn;
661  isapnp->logdev = logdev;
662 
663  /* Wake the card */
665  isapnp_send_key();
666  isapnp_wake ( csn );
667 
668  /* Read the card identifier */
669  isapnp_peek ( &identifier, sizeof ( identifier ) );
670 
671  /* No card with this CSN; stop here */
672  if ( identifier.vendor_id & 0x80 )
673  goto done;
674 
675  /* Find the Logical Device ID tag */
676  if ( ( rc = isapnp_find_logdevid ( logdev,
677  &logdevid ) ) != 0){
678  /* No more logical devices; go to next CSN */
679  break;
680  }
681 
682  /* Select the logical device */
683  isapnp_logicaldevice ( logdev );
684 
685  /* Populate struct isapnp_device */
686  isapnp->vendor_id = logdevid.vendor_id;
687  isapnp->prod_id = logdevid.prod_id;
688  isapnp->ioaddr = isapnp_read_iobase ( 0 );
689  isapnp->irqno = isapnp_read_irqno ( 0 );
690 
691  /* Return all cards to Wait for Key state */
693 
694  /* Add to device hierarchy */
695  snprintf ( isapnp->dev.name,
696  sizeof ( isapnp->dev.name ),
697  "ISAPnP%02x:%02x", csn, logdev );
698  isapnp->dev.desc.bus_type = BUS_TYPE_ISAPNP;
699  isapnp->dev.desc.vendor = isapnp->vendor_id;
700  isapnp->dev.desc.device = isapnp->prod_id;
701  isapnp->dev.desc.ioaddr = isapnp->ioaddr;
702  isapnp->dev.desc.irq = isapnp->irqno;
703  isapnp->dev.parent = &rootdev->dev;
704  list_add ( &isapnp->dev.siblings,
705  &rootdev->dev.children );
706  INIT_LIST_HEAD ( &isapnp->dev.children );
707 
708  /* Look for a driver */
709  if ( isapnp_probe ( isapnp ) == 0 ) {
710  /* isapnpdev registered, we can drop our ref */
711  isapnp = NULL;
712  } else {
713  /* Not registered; re-use struct */
714  list_del ( &isapnp->dev.siblings );
715  }
716  }
717  }
718 
719  done:
720  free ( isapnp );
721  return 0;
722 
723  err:
724  free ( isapnp );
725  isapnpbus_remove ( rootdev );
726  return rc;
727 }
struct device dev
Generic device.
Definition: isapnp.h:185
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
static unsigned int isapnp_read_iobase(unsigned int index)
Definition: isapnp.c:210
static void isapnp_wake(uint8_t csn)
Place a specified card into the Config state.
Definition: isapnp.c:170
#define list_add(new, head)
Add a new entry to the head of a list.
Definition: list.h:69
uint16_t vendor_id
Vendor ID.
Definition: isapnp.h:187
unsigned long ioaddr
I/O address.
Definition: device.h:37
An ISAPnP logical device ID structure.
Definition: isapnp.h:163
char name[40]
Name.
Definition: device.h:75
static int isapnp_probe(struct isapnp_device *isapnp)
Probe an ISAPnP device.
Definition: isapnp.c:583
uint16_t ioaddr
I/O address.
Definition: isapnp.h:191
struct device dev
Device chain.
Definition: device.h:99
unsigned int vendor
Vendor ID.
Definition: device.h:31
struct device * parent
Bus device.
Definition: device.h:85
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
#define ENOMEM
Not enough space.
Definition: errno.h:534
uint16_t prod_id
Product ID.
Definition: isapnp.h:189
unsigned int irq
IRQ.
Definition: device.h:39
static void isapnpbus_remove(struct root_device *rootdev)
Remove ISAPnP root bus.
Definition: isapnp.c:734
An ISAPnP device.
Definition: isapnp.h:183
static void(* free)(struct refcnt *refcnt))
Definition: refcnt.h:54
struct list_head siblings
Devices on the same bus.
Definition: device.h:81
uint16_t isapnp_read_port
ISAPnP Read Port address.
Definition: isapnp.c:76
static void isapnp_isolate(void)
Find a valid read port and isolate all ISAPnP cards.
Definition: isapnp.c:524
void * malloc(size_t size)
Allocate memory.
Definition: malloc.c:583
static void isapnp_peek(void *buf, size_t len)
Read resource data.
Definition: isapnp.c:317
static int isapnp_find_logdevid(unsigned int logdev, struct isapnp_logdevid *logdevid)
Find specified Logical Device ID tag.
Definition: isapnp.c:376
uint8_t irqno
Interrupt number.
Definition: isapnp.h:193
#define INIT_LIST_HEAD(list)
Initialise a list head.
Definition: list.h:45
unsigned int bus_type
Bus type.
Definition: device.h:24
static void isapnp_logicaldevice(unsigned int logdev)
Definition: isapnp.c:196
unsigned int device
Device ID.
Definition: device.h:33
struct list_head children
Devices attached to this device.
Definition: device.h:83
static void isapnp_wait_for_key(void)
Enter the Wait for Key state.
Definition: isapnp.c:145
An ISAPnP serial identifier.
Definition: isapnp.h:151
struct device_description desc
Device description.
Definition: device.h:79
static void isapnp_send_key(void)
Send the ISAPnP initiation key.
Definition: isapnp.c:251
int snprintf(char *buf, size_t size, const char *fmt,...)
Write a formatted string to a buffer.
Definition: vsprintf.c:382
uint8_t csn
Card Select Number.
Definition: isapnp.h:195
uint8_t logdev
Logical Device ID.
Definition: isapnp.h:197
static unsigned int isapnp_read_irqno(unsigned int index)
Definition: isapnp.c:214
#define NULL
NULL pointer (VOID *)
Definition: Base.h:362
struct bofm_section_header done
Definition: bofm_test.c:46
#define BUS_TYPE_ISAPNP
ISAPnP bus type.
Definition: device.h:46
void * memset(void *dest, int character, size_t len) __nonnull

References device_description::bus_type, BUS_TYPE_ISAPNP, device::children, isapnp_device::csn, device::desc, root_device::dev, isapnp_device::dev, device_description::device, done, ENOMEM, free, INIT_LIST_HEAD, device_description::ioaddr, isapnp_device::ioaddr, device_description::irq, isapnp_device::irqno, isapnp_find_logdevid(), isapnp_isolate(), isapnp_logicaldevice(), isapnp_peek(), isapnp_probe(), isapnp_read_iobase(), isapnp_read_irqno(), isapnp_read_port, isapnp_send_key(), isapnp_wait_for_key(), isapnp_wake(), isapnpbus_remove(), list_add, list_del, isapnp_device::logdev, malloc(), memset(), device::name, NULL, device::parent, isapnp_logdevid::prod_id, isapnp_device::prod_id, rc, device::siblings, snprintf(), device_description::vendor, isapnp_identifier::vendor_id, isapnp_logdevid::vendor_id, and isapnp_device::vendor_id.

Variable Documentation

◆ isapnp_read_port

uint16_t isapnp_read_port

ISAPnP Read Port address.

ROM prefix may be able to set this address, which is why this is non-static.

Definition at line 76 of file isapnp.c.

Referenced by isapnp_isolate(), isapnp_read_data(), isapnp_set_read_port(), isapnp_try_isolate(), and isapnpbus_probe().

◆ isapnp_root_driver

struct root_driver isapnp_root_driver
static
Initial value:
= {
.probe = isapnpbus_probe,
.remove = isapnpbus_remove,
}
static int isapnpbus_probe(struct root_device *rootdev)
Probe ISAPnP root bus.
Definition: isapnp.c:637
static void isapnpbus_remove(struct root_device *rootdev)
Remove ISAPnP root bus.
Definition: isapnp.c:734

ISAPnP bus root device driver.

Definition at line 747 of file isapnp.c.

◆ __root_device

struct root_device isapnp_root_device __root_device
Initial value:
= {
.dev = { .name = "ISAPnP" },
.driver = &isapnp_root_driver,
}
static struct root_driver isapnp_root_driver
ISAPnP bus root device driver.
Definition: isapnp.c:747

ISAPnP bus root device.

Definition at line 753 of file isapnp.c.