diff options
Diffstat (limited to 'drivers/media/video/cpia_pp.c')
| -rw-r--r-- | drivers/media/video/cpia_pp.c | 886 |
1 files changed, 886 insertions, 0 deletions
diff --git a/drivers/media/video/cpia_pp.c b/drivers/media/video/cpia_pp.c new file mode 100644 index 00000000000..ddf184f95d8 --- /dev/null +++ b/drivers/media/video/cpia_pp.c @@ -0,0 +1,886 @@ +/* + * cpia_pp CPiA Parallel Port driver + * + * Supports CPiA based parallel port Video Camera's. + * + * (C) Copyright 1999 Bas Huisman <bhuism@cs.utwente.nl> + * (C) Copyright 1999-2000 Scott J. Bertin <sbertin@securenym.net>, + * (C) Copyright 1999-2000 Peter Pregler <Peter_Pregler@email.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* define _CPIA_DEBUG_ for verbose debug output (see cpia.h) */ +/* #define _CPIA_DEBUG_ 1 */ + +#include <linux/config.h> + +#include <linux/module.h> +#include <linux/init.h> + +#include <linux/kernel.h> +#include <linux/parport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/workqueue.h> +#include <linux/smp_lock.h> +#include <linux/sched.h> + +#include <linux/kmod.h> + +/* #define _CPIA_DEBUG_ define for verbose debug output */ +#include "cpia.h" + +static int cpia_pp_open(void *privdata); +static int cpia_pp_registerCallback(void *privdata, void (*cb) (void *cbdata), + void *cbdata); +static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data); +static int cpia_pp_streamStart(void *privdata); +static int cpia_pp_streamStop(void *privdata); +static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock); +static int cpia_pp_close(void *privdata); + + +#define ABOUT "Parallel port driver for Vision CPiA based cameras" + +#define PACKET_LENGTH 8 + +/* Magic numbers for defining port-device mappings */ +#define PPCPIA_PARPORT_UNSPEC -4 +#define PPCPIA_PARPORT_AUTO -3 +#define PPCPIA_PARPORT_OFF -2 +#define PPCPIA_PARPORT_NONE -1 + +#ifdef MODULE +static int parport_nr[PARPORT_MAX] = {[0 ... PARPORT_MAX - 1] = PPCPIA_PARPORT_UNSPEC}; +static char *parport[PARPORT_MAX] = {NULL,}; + +MODULE_AUTHOR("B. Huisman <bhuism@cs.utwente.nl> & Peter Pregler <Peter_Pregler@email.com>"); +MODULE_DESCRIPTION("Parallel port driver for Vision CPiA based cameras"); +MODULE_LICENSE("GPL"); + +module_param_array(parport, charp, NULL, 0); +MODULE_PARM_DESC(parport, "'auto' or a list of parallel port numbers. Just like lp."); +#else +static int parport_nr[PARPORT_MAX] __initdata = + {[0 ... PARPORT_MAX - 1] = PPCPIA_PARPORT_UNSPEC}; +static int parport_ptr = 0; +#endif + +struct pp_cam_entry { + struct pardevice *pdev; + struct parport *port; + struct work_struct cb_task; + int open_count; + wait_queue_head_t wq_stream; + /* image state flags */ + int image_ready; /* we got an interrupt */ + int image_complete; /* we have seen 4 EOI */ + + int streaming; /* we are in streaming mode */ + int stream_irq; +}; + +static struct cpia_camera_ops cpia_pp_ops = +{ + cpia_pp_open, + cpia_pp_registerCallback, + cpia_pp_transferCmd, + cpia_pp_streamStart, + cpia_pp_streamStop, + cpia_pp_streamRead, + cpia_pp_close, + 1, + THIS_MODULE +}; + +static LIST_HEAD(cam_list); +static spinlock_t cam_list_lock_pp; + +/* FIXME */ +static void cpia_parport_enable_irq( struct parport *port ) { + parport_enable_irq(port); + mdelay(10); + return; +} + +static void cpia_parport_disable_irq( struct parport *port ) { + parport_disable_irq(port); + mdelay(10); + return; +} + +/* Special CPiA PPC modes: These are invoked by using the 1284 Extensibility + * Link Flag during negotiation */ +#define UPLOAD_FLAG 0x08 +#define NIBBLE_TRANSFER 0x01 +#define ECP_TRANSFER 0x03 + +#define PARPORT_CHUNK_SIZE PAGE_SIZE + + +/**************************************************************************** + * + * CPiA-specific low-level parport functions for nibble uploads + * + ***************************************************************************/ +/* CPiA nonstandard "Nibble" mode (no nDataAvail signal after each byte). */ +/* The standard kernel parport_ieee1284_read_nibble() fails with the CPiA... */ + +static size_t cpia_read_nibble (struct parport *port, + void *buffer, size_t len, + int flags) +{ + /* adapted verbatim, with one change, from + parport_ieee1284_read_nibble() in drivers/parport/ieee1284-ops.c */ + + unsigned char *buf = buffer; + int i; + unsigned char byte = 0; + + len *= 2; /* in nibbles */ + for (i=0; i < len; i++) { + unsigned char nibble; + + /* The CPiA firmware suppresses the use of nDataAvail (nFault LO) + * after every second nibble to signal that more + * data is available. (the total number of Bytes that + * should be sent is known; if too few are received, an error + * will be recorded after a timeout). + * This is incompatible with parport_ieee1284_read_nibble(), + * which expects to find nFault LO after every second nibble. + */ + + /* Solution: modify cpia_read_nibble to only check for + * nDataAvail before the first nibble is sent. + */ + + /* Does the error line indicate end of data? */ + if (((i /*& 1*/) == 0) && + (parport_read_status(port) & PARPORT_STATUS_ERROR)) { + port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DNA; + DBG("%s: No more nibble data (%d bytes)\n", + port->name, i/2); + + /* Go to reverse idle phase. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE; + break; + } + + /* Event 7: Set nAutoFd low. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 9: nAck goes low. */ + port->ieee1284.phase = IEEE1284_PH_REV_DATA; + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, 0)) { + /* Timeout -- no more data? */ + DBG("%s: Nibble timeout at event 9 (%d bytes)\n", + port->name, i/2); + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + break; + } + + + /* Read a nibble. */ + nibble = parport_read_status (port) >> 3; + nibble &= ~8; + if ((nibble & 0x10) == 0) + nibble |= 8; + nibble &= 0xf; + + /* Event 10: Set nAutoFd high. */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + + /* Event 11: nAck goes high. */ + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK)) { + /* Timeout -- no more data? */ + DBG("%s: Nibble timeout at event 11\n", + port->name); + break; + } + + if (i & 1) { + /* Second nibble */ + byte |= nibble << 4; + *buf++ = byte; + } else + byte = nibble; + } + + i /= 2; /* i is now in bytes */ + + if (i == len) { + /* Read the last nibble without checking data avail. */ + port = port->physport; + if (parport_read_status (port) & PARPORT_STATUS_ERROR) + port->ieee1284.phase = IEEE1284_PH_HBUSY_DNA; + else + port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL; + } + + return i; +} + +/* CPiA nonstandard "Nibble Stream" mode (2 nibbles per cycle, instead of 1) + * (See CPiA Data sheet p. 31) + * + * "Nibble Stream" mode used by CPiA for uploads to non-ECP ports is a + * nonstandard variant of nibble mode which allows the same (mediocre) + * data flow of 8 bits per cycle as software-enabled ECP by TRISTATE-capable + * parallel ports, but works also for non-TRISTATE-capable ports. + * (Standard nibble mode only send 4 bits per cycle) + * + */ + +static size_t cpia_read_nibble_stream(struct parport *port, + void *buffer, size_t len, + int flags) +{ + int i; + unsigned char *buf = buffer; + int endseen = 0; + + for (i=0; i < len; i++) { + unsigned char nibble[2], byte = 0; + int j; + + /* Image Data is complete when 4 consecutive EOI bytes (0xff) are seen */ + if (endseen > 3 ) + break; + + /* Event 7: Set nAutoFd low. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 9: nAck goes low. */ + port->ieee1284.phase = IEEE1284_PH_REV_DATA; + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, 0)) { + /* Timeout -- no more data? */ + DBG("%s: Nibble timeout at event 9 (%d bytes)\n", + port->name, i/2); + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + break; + } + + /* Read lower nibble */ + nibble[0] = parport_read_status (port) >>3; + + /* Event 10: Set nAutoFd high. */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + + /* Event 11: nAck goes high. */ + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK)) { + /* Timeout -- no more data? */ + DBG("%s: Nibble timeout at event 11\n", + port->name); + break; + } + + /* Read upper nibble */ + nibble[1] = parport_read_status (port) >>3; + + /* reassemble the byte */ + for (j = 0; j < 2 ; j++ ) { + nibble[j] &= ~8; + if ((nibble[j] & 0x10) == 0) + nibble[j] |= 8; + nibble[j] &= 0xf; + } + byte = (nibble[0] |(nibble[1] << 4)); + *buf++ = byte; + + if(byte == EOI) + endseen++; + else + endseen = 0; + } + return i; +} + +/**************************************************************************** + * + * EndTransferMode + * + ***************************************************************************/ +static void EndTransferMode(struct pp_cam_entry *cam) +{ + parport_negotiate(cam->port, IEEE1284_MODE_COMPAT); +} + +/**************************************************************************** + * + * ForwardSetup + * + ***************************************************************************/ +static int ForwardSetup(struct pp_cam_entry *cam) +{ + int retry; + + /* The CPiA uses ECP protocol for Downloads from the Host to the camera. + * This will be software-emulated if ECP hardware is not present + */ + + /* the usual camera maximum response time is 10ms, but after receiving + * some commands, it needs up to 40ms. (Data Sheet p. 32)*/ + + for(retry = 0; retry < 4; ++retry) { + if(!parport_negotiate(cam->port, IEEE1284_MODE_ECP)) { + break; + } + mdelay(10); + } + if(retry == 4) { + DBG("Unable to negotiate IEEE1284 ECP Download mode\n"); + return -1; + } + return 0; +} +/**************************************************************************** + * + * ReverseSetup + * + ***************************************************************************/ +static int ReverseSetup(struct pp_cam_entry *cam, int extensibility) +{ + int retry; + int upload_mode, mode = IEEE1284_MODE_ECP; + int transfer_mode = ECP_TRANSFER; + + if (!(cam->port->modes & PARPORT_MODE_ECP) && + !(cam->port->modes & PARPORT_MODE_TRISTATE)) { + mode = IEEE1284_MODE_NIBBLE; + transfer_mode = NIBBLE_TRANSFER; + } + + upload_mode = mode; + if(extensibility) mode = UPLOAD_FLAG|transfer_mode|IEEE1284_EXT_LINK; + + /* the usual camera maximum response time is 10ms, but after + * receiving some commands, it needs up to 40ms. */ + + for(retry = 0; retry < 4; ++retry) { + if(!parport_negotiate(cam->port, mode)) { + break; + } + mdelay(10); + } + if(retry == 4) { + if(extensibility) + DBG("Unable to negotiate upload extensibility mode\n"); + else + DBG("Unable to negotiate upload mode\n"); + return -1; + } + if(extensibility) cam->port->ieee1284.mode = upload_mode; + return 0; +} + +/**************************************************************************** + * + * WritePacket + * + ***************************************************************************/ +static int WritePacket(struct pp_cam_entry *cam, const u8 *packet, size_t size) +{ + int retval=0; + int size_written; + + if (packet == NULL) { + return -EINVAL; + } + if (ForwardSetup(cam)) { + DBG("Write failed in setup\n"); + return -EIO; + } + size_written = parport_write(cam->port, packet, size); + if(size_written != size) { + DBG("Write failed, wrote %d/%d\n", size_written, size); + retval = -EIO; + } + EndTransferMode(cam); + return retval; +} + +/**************************************************************************** + * + * ReadPacket + * + ***************************************************************************/ +static int ReadPacket(struct pp_cam_entry *cam, u8 *packet, size_t size) +{ + int retval=0; + + if (packet == NULL) { + return -EINVAL; + } + if (ReverseSetup(cam, 0)) { + return -EIO; + } + + /* support for CPiA variant nibble reads */ + if(cam->port->ieee1284.mode == IEEE1284_MODE_NIBBLE) { + if(cpia_read_nibble(cam->port, packet, size, 0) != size) + retval = -EIO; + } else { + if(parport_read(cam->port, packet, size) != size) + retval = -EIO; + } + EndTransferMode(cam); + return retval; +} + +/**************************************************************************** + * + * cpia_pp_streamStart + * + ***************************************************************************/ +static int cpia_pp_streamStart(void *privdata) +{ + struct pp_cam_entry *cam = privdata; + DBG("\n"); + cam->streaming=1; + cam->image_ready=0; + //if (ReverseSetup(cam,1)) return -EIO; + if(cam->stream_irq) cpia_parport_enable_irq(cam->port); + return 0; +} + +/**************************************************************************** + * + * cpia_pp_streamStop + * + ***************************************************************************/ +static int cpia_pp_streamStop(void *privdata) +{ + struct pp_cam_entry *cam = privdata; + + DBG("\n"); + cam->streaming=0; + cpia_parport_disable_irq(cam->port); + //EndTransferMode(cam); + + return 0; +} + +/**************************************************************************** + * + * cpia_pp_streamRead + * + ***************************************************************************/ +static int cpia_pp_read(struct parport *port, u8 *buffer, int len) +{ + int bytes_read; + + /* support for CPiA variant "nibble stream" reads */ + if(port->ieee1284.mode == IEEE1284_MODE_NIBBLE) + bytes_read = cpia_read_nibble_stream(port,buffer,len,0); + else { + int new_bytes; + for(bytes_read=0; bytes_read<len; bytes_read += new_bytes) { + new_bytes = parport_read(port, buffer+bytes_read, + len-bytes_read); + if(new_bytes < 0) break; + } + } + return bytes_read; +} + +static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock) +{ + struct pp_cam_entry *cam = privdata; + int read_bytes = 0; + int i, endseen, block_size, new_bytes; + + if(cam == NULL) { + DBG("Internal driver error: cam is NULL\n"); + return -EINVAL; + } + if(buffer == NULL) { + DBG("Internal driver error: buffer is NULL\n"); + return -EINVAL; + } + //if(cam->streaming) DBG("%d / %d\n", cam->image_ready, noblock); + if( cam->stream_irq ) { + DBG("%d\n", cam->image_ready); + cam->image_ready--; + } + cam->image_complete=0; + if (0/*cam->streaming*/) { + if(!cam->image_ready) { + if(noblock) return -EWOULDBLOCK; + interruptible_sleep_on(&cam->wq_stream); + if( signal_pending(current) ) return -EINTR; + DBG("%d\n", cam->image_ready); + } + } else { + if (ReverseSetup(cam, 1)) { + DBG("unable to ReverseSetup\n"); + return -EIO; + } + } + endseen = 0; + block_size = PARPORT_CHUNK_SIZE; + while( !cam->image_complete ) { + cond_resched(); + + new_bytes = cpia_pp_read(cam->port, buffer, block_size ); + if( new_bytes <= 0 ) { + break; + } + i=-1; + while(++i<new_bytes && endseen<4) { + if(*buffer==EOI) { + endseen++; + } else { + endseen=0; + } + buffer++; + } + read_bytes += i; + if( endseen==4 ) { + cam->image_complete=1; + break; + } + if( CPIA_MAX_IMAGE_SIZE-read_bytes <= PARPORT_CHUNK_SIZE ) { + block_size=CPIA_MAX_IMAGE_SIZE-read_bytes; + } + } + EndTransferMode(cam); + return cam->image_complete ? read_bytes : -EIO; +} +/**************************************************************************** + * + * cpia_pp_transferCmd + * + ***************************************************************************/ +static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data) +{ + int err; + int retval=0; + int databytes; + struct pp_cam_entry *cam = privdata; + + if(cam == NULL) { + DBG("Internal driver error: cam is NULL\n"); + return -EINVAL; + } + if(command == NULL) { + DBG("Internal driver error: command is NULL\n"); + return -EINVAL; + } + databytes = (((int)command[7])<<8) | command[6]; + if ((err = WritePacket(cam, command, PACKET_LENGTH)) < 0) { + DBG("Error writing command\n"); + return err; + } + if(command[0] == DATA_IN) { + u8 buffer[8]; + if(data == NULL) { + DBG("Internal driver error: data is NULL\n"); + return -EINVAL; + } + if((err = ReadPacket(cam, buffer, 8)) < 0) { + DBG("Error reading command result\n"); + return err; + } + memcpy(data, buffer, databytes); + } else if(command[0] == DATA_OUT) { + if(databytes > 0) { + if(data == NULL) { + DBG("Internal driver error: data is NULL\n"); + retval = -EINVAL; + } else { + if((err=WritePacket(cam, data, databytes)) < 0){ + DBG("Error writing command data\n"); + return err; + } + } + } + } else { + DBG("Unexpected first byte of command: %x\n", command[0]); + retval = -EINVAL; + } + return retval; +} + +/**************************************************************************** + * + * cpia_pp_open + * + ***************************************************************************/ +static int cpia_pp_open(void *privdata) +{ + struct pp_cam_entry *cam = (struct pp_cam_entry *)privdata; + + if (cam == NULL) + return -EINVAL; + + if(cam->open_count == 0) { + if (parport_claim(cam->pdev)) { + DBG("failed to claim the port\n"); + return -EBUSY; + } + parport_negotiate(cam->port, IEEE1284_MODE_COMPAT); + parport_data_forward(cam->port); + parport_write_control(cam->port, PARPORT_CONTROL_SELECT); + udelay(50); + parport_write_control(cam->port, + PARPORT_CONTROL_SELECT + | PARPORT_CONTROL_INIT); + } + + ++cam->open_count; + + return 0; +} + +/**************************************************************************** + * + * cpia_pp_registerCallback + * + ***************************************************************************/ +static int cpia_pp_registerCallback(void *privdata, void (*cb)(void *cbdata), void *cbdata) +{ + struct pp_cam_entry *cam = privdata; + int retval = 0; + + if(cam->port->irq != PARPORT_IRQ_NONE) { + INIT_WORK(&cam->cb_task, cb, cbdata); + } else { + retval = -1; + } + return retval; +} + +/**************************************************************************** + * + * cpia_pp_close + * + ***************************************************************************/ +static int cpia_pp_close(void *privdata) +{ + struct pp_cam_entry *cam = privdata; + if (--cam->open_count == 0) { + parport_release(cam->pdev); + } + return 0; +} + +/**************************************************************************** + * + * cpia_pp_register + * + ***************************************************************************/ +static int cpia_pp_register(struct parport *port) +{ + struct pardevice *pdev = NULL; + struct pp_cam_entry *cam; + struct cam_data *cpia; + + if (!(port->modes & PARPORT_MODE_PCSPP)) { + LOG("port is not supported by CPiA driver\n"); + return -ENXIO; + } + + cam = kmalloc(sizeof(struct pp_cam_entry), GFP_KERNEL); + if (cam == NULL) { + LOG("failed to allocate camera structure\n"); + return -ENOMEM; + } + memset(cam,0,sizeof(struct pp_cam_entry)); + + pdev = parport_register_device(port, "cpia_pp", NULL, NULL, + NULL, 0, cam); + + if (!pdev) { + LOG("failed to parport_register_device\n"); + kfree(cam); + return -ENXIO; + } + + cam->pdev = pdev; + cam->port = port; + init_waitqueue_head(&cam->wq_stream); + + cam->streaming = 0; + cam->stream_irq = 0; + + if((cpia = cpia_register_camera(&cpia_pp_ops, cam)) == NULL) { + LOG("failed to cpia_register_camera\n"); + parport_unregister_device(pdev); + kfree(cam); + return -ENXIO; + } + spin_lock( &cam_list_lock_pp ); + list_add( &cpia->cam_data_list, &cam_list ); + spin_unlock( &cam_list_lock_pp ); + + return 0; +} + +static void cpia_pp_detach (struct parport *port) +{ + struct list_head *tmp; + struct cam_data *cpia = NULL; + struct pp_cam_entry *cam; + + spin_lock( &cam_list_lock_pp ); + list_for_each (tmp, &cam_list) { + cpia = list_entry(tmp, struct cam_data, cam_data_list); + cam = (struct pp_cam_entry *) cpia->lowlevel_data; + if (cam && cam->port->number == port->number) { + list_del(&cpia->cam_data_list); + break; + } + cpia = NULL; + } + spin_unlock( &cam_list_lock_pp ); + + if (!cpia) { + DBG("cpia_pp_detach failed to find cam_data in cam_list\n"); + return; + } + + cam = (struct pp_cam_entry *) cpia->lowlevel_data; + cpia_unregister_camera(cpia); + if(cam->open_count > 0) + cpia_pp_close(cam); + parport_unregister_device(cam->pdev); + cpia->lowlevel_data = NULL; + kfree(cam); +} + +static void cpia_pp_attach (struct parport *port) +{ + unsigned int i; + + switch (parport_nr[0]) + { + case PPCPIA_PARPORT_UNSPEC: + case PPCPIA_PARPORT_AUTO: + if (port->probe_info[0].class != PARPORT_CLASS_MEDIA || + port->probe_info[0].cmdset == NULL || + strncmp(port->probe_info[0].cmdset, "CPIA_1", 6) != 0) + return; + + cpia_pp_register(port); + + break; + + default: + for (i = 0; i < PARPORT_MAX; ++i) { + if (port->number == parport_nr[i]) { + cpia_pp_register(port); + break; + } + } + break; + } +} + +static struct parport_driver cpia_pp_driver = { + .name = "cpia_pp", + .attach = cpia_pp_attach, + .detach = cpia_pp_detach, +}; + +int cpia_pp_init(void) +{ + printk(KERN_INFO "%s v%d.%d.%d\n",ABOUT, + CPIA_PP_MAJ_VER,CPIA_PP_MIN_VER,CPIA_PP_PATCH_VER); + + if(parport_nr[0] == PPCPIA_PARPORT_OFF) { + printk(" disabled\n"); + return 0; + } + + spin_lock_init( &cam_list_lock_pp ); + + if (parport_register_driver (&cpia_pp_driver)) { + LOG ("unable to register with parport\n"); + return -EIO; + } + return 0; +} + +#ifdef MODULE +int init_module(void) +{ + if (parport[0]) { + /* The user gave some parameters. Let's see what they were. */ + if (!strncmp(parport[0], "auto", 4)) { + parport_nr[0] = PPCPIA_PARPORT_AUTO; + } else { + int n; + for (n = 0; n < PARPORT_MAX && parport[n]; n++) { + if (!strncmp(parport[n], "none", 4)) { + parport_nr[n] = PPCPIA_PARPORT_NONE; + } else { + char *ep; + unsigned long r = simple_strtoul(parport[n], &ep, 0); + if (ep != parport[n]) { + parport_nr[n] = r; + } else { + LOG("bad port specifier `%s'\n", parport[n]); + return -ENODEV; + } + } + } + } + } + return cpia_pp_init(); +} + +void cleanup_module(void) +{ + parport_unregister_driver (&cpia_pp_driver); + return; +} + +#else /* !MODULE */ + +static int __init cpia_pp_setup(char *str) +{ + if (!strncmp(str, "parport", 7)) { + int n = simple_strtoul(str + 7, NULL, 10); + if (parport_ptr < PARPORT_MAX) { + parport_nr[parport_ptr++] = n; + } else { + LOG("too many ports, %s ignored.\n", str); + } + } else if (!strcmp(str, "auto")) { + parport_nr[0] = PPCPIA_PARPORT_AUTO; + } else if (!strcmp(str, "none")) { + parport_nr[parport_ptr++] = PPCPIA_PARPORT_NONE; + } + + return 0; +} + +__setup("cpia_pp=", cpia_pp_setup); + +#endif /* !MODULE */ |