init.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:6k
- /* Parallel-port initialisation code.
- *
- * Authors: David Campbell <campbell@torque.net>
- * Tim Waugh <tim@cyberelk.demon.co.uk>
- * Jose Renau <renau@acm.org>
- *
- * based on work by Grant Guenther <grant@torque.net>
- * and Philip Blundell <Philip.Blundell@pobox.com>
- */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/threads.h>
- #include <linux/string.h>
- #include <linux/parport.h>
- #include <linux/errno.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- #ifndef MODULE
- static int io[PARPORT_MAX+1] __initdata = { [0 ... PARPORT_MAX] = 0 };
- #ifdef CONFIG_PARPORT_PC
- static int io_hi[PARPORT_MAX+1] __initdata =
- { [0 ... PARPORT_MAX] = PARPORT_IOHI_AUTO };
- #endif
- static int irq[PARPORT_MAX] __initdata = { [0 ... PARPORT_MAX-1] = PARPORT_IRQ_PROBEONLY };
- static int dma[PARPORT_MAX] __initdata = { [0 ... PARPORT_MAX-1] = PARPORT_DMA_NONE };
- extern int parport_pc_init(int *io, int *io_hi, int *irq, int *dma);
- extern int parport_sunbpp_init(void);
- extern int parport_amiga_init(void);
- extern int parport_mfc3_init(void);
- static int parport_setup_ptr __initdata = 0;
- /*
- * Acceptable parameters:
- *
- * parport=0
- * parport=auto
- * parport=0xBASE[,IRQ[,DMA]]
- *
- * IRQ/DMA may be numeric or 'auto' or 'none'
- */
- static int __init parport_setup (char *str)
- {
- char *endptr;
- char *sep;
- int val;
- if (!str || !*str || (*str == '0' && !*(str+1))) {
- /* Disable parport if "parport=0" in cmdline */
- io[0] = PARPORT_DISABLE;
- return 1;
- }
- if (!strncmp (str, "auto", 4)) {
- irq[0] = PARPORT_IRQ_AUTO;
- dma[0] = PARPORT_DMA_AUTO;
- return 1;
- }
- val = simple_strtoul (str, &endptr, 0);
- if (endptr == str) {
- printk (KERN_WARNING "parport=%s not understoodn", str);
- return 1;
- }
- if (parport_setup_ptr == PARPORT_MAX) {
- printk(KERN_ERR "parport=%s ignored, too many portsn", str);
- return 1;
- }
-
- io[parport_setup_ptr] = val;
- irq[parport_setup_ptr] = PARPORT_IRQ_NONE;
- dma[parport_setup_ptr] = PARPORT_DMA_NONE;
- sep = strchr (str, ',');
- if (sep++) {
- if (!strncmp (sep, "auto", 4))
- irq[parport_setup_ptr] = PARPORT_IRQ_AUTO;
- else if (strncmp (sep, "none", 4)) {
- val = simple_strtoul (sep, &endptr, 0);
- if (endptr == sep) {
- printk (KERN_WARNING
- "parport=%s: irq not understoodn",
- str);
- return 1;
- }
- irq[parport_setup_ptr] = val;
- }
- }
- sep = strchr (sep, ',');
- if (sep++) {
- if (!strncmp (sep, "auto", 4))
- dma[parport_setup_ptr] = PARPORT_DMA_AUTO;
- else if (!strncmp (sep, "nofifo", 6))
- dma[parport_setup_ptr] = PARPORT_DMA_NOFIFO;
- else if (strncmp (sep, "none", 4)) {
- val = simple_strtoul (sep, &endptr, 0);
- if (endptr == sep) {
- printk (KERN_WARNING
- "parport=%s: dma not understoodn",
- str);
- return 1;
- }
- dma[parport_setup_ptr] = val;
- }
- }
- parport_setup_ptr++;
- return 1;
- }
- __setup ("parport=", parport_setup);
- #endif
- #ifdef MODULE
- int init_module(void)
- {
- #ifdef CONFIG_SYSCTL
- parport_default_proc_register ();
- #endif
- return 0;
- }
- void cleanup_module(void)
- {
- #ifdef CONFIG_SYSCTL
- parport_default_proc_unregister ();
- #endif
- }
- #else
- int __init parport_init (void)
- {
- if (io[0] == PARPORT_DISABLE)
- return 1;
- #ifdef CONFIG_SYSCTL
- parport_default_proc_register ();
- #endif
- #ifdef CONFIG_PARPORT_PC
- parport_pc_init(io, io_hi, irq, dma);
- #endif
- #ifdef CONFIG_PARPORT_AMIGA
- parport_amiga_init();
- #endif
- #ifdef CONFIG_PARPORT_MFC3
- parport_mfc3_init();
- #endif
- #ifdef CONFIG_PARPORT_ATARI
- parport_atari_init();
- #endif
- #ifdef CONFIG_PARPORT_ARC
- parport_arc_init();
- #endif
- #ifdef CONFIG_PARPORT_SUNBPP
- parport_sunbpp_init();
- #endif
- return 0;
- }
- __initcall(parport_init);
- #endif
- /* Exported symbols for modules. */
- EXPORT_SYMBOL(parport_claim);
- EXPORT_SYMBOL(parport_claim_or_block);
- EXPORT_SYMBOL(parport_release);
- EXPORT_SYMBOL(parport_register_port);
- EXPORT_SYMBOL(parport_announce_port);
- EXPORT_SYMBOL(parport_unregister_port);
- EXPORT_SYMBOL(parport_register_driver);
- EXPORT_SYMBOL(parport_unregister_driver);
- EXPORT_SYMBOL(parport_register_device);
- EXPORT_SYMBOL(parport_unregister_device);
- EXPORT_SYMBOL(parport_enumerate);
- EXPORT_SYMBOL(parport_get_port);
- EXPORT_SYMBOL(parport_put_port);
- EXPORT_SYMBOL(parport_find_number);
- EXPORT_SYMBOL(parport_find_base);
- EXPORT_SYMBOL(parport_negotiate);
- EXPORT_SYMBOL(parport_write);
- EXPORT_SYMBOL(parport_read);
- EXPORT_SYMBOL(parport_ieee1284_wakeup);
- EXPORT_SYMBOL(parport_wait_peripheral);
- EXPORT_SYMBOL(parport_poll_peripheral);
- EXPORT_SYMBOL(parport_wait_event);
- EXPORT_SYMBOL(parport_set_timeout);
- EXPORT_SYMBOL(parport_ieee1284_interrupt);
- EXPORT_SYMBOL(parport_ieee1284_ecp_write_data);
- EXPORT_SYMBOL(parport_ieee1284_ecp_read_data);
- EXPORT_SYMBOL(parport_ieee1284_ecp_write_addr);
- EXPORT_SYMBOL(parport_ieee1284_write_compat);
- EXPORT_SYMBOL(parport_ieee1284_read_nibble);
- EXPORT_SYMBOL(parport_ieee1284_read_byte);
- EXPORT_SYMBOL(parport_ieee1284_epp_write_data);
- EXPORT_SYMBOL(parport_ieee1284_epp_read_data);
- EXPORT_SYMBOL(parport_ieee1284_epp_write_addr);
- EXPORT_SYMBOL(parport_ieee1284_epp_read_addr);
- EXPORT_SYMBOL(parport_proc_register);
- EXPORT_SYMBOL(parport_proc_unregister);
- EXPORT_SYMBOL(parport_device_proc_register);
- EXPORT_SYMBOL(parport_device_proc_unregister);
- EXPORT_SYMBOL(parport_default_proc_register);
- EXPORT_SYMBOL(parport_default_proc_unregister);
- EXPORT_SYMBOL(parport_parse_irqs);
- EXPORT_SYMBOL(parport_parse_dmas);
- #ifdef CONFIG_PARPORT_1284
- EXPORT_SYMBOL(parport_open);
- EXPORT_SYMBOL(parport_close);
- EXPORT_SYMBOL(parport_device_id);
- EXPORT_SYMBOL(parport_device_num);
- EXPORT_SYMBOL(parport_device_coords);
- EXPORT_SYMBOL(parport_daisy_deselect_all);
- EXPORT_SYMBOL(parport_daisy_select);
- EXPORT_SYMBOL(parport_daisy_init);
- EXPORT_SYMBOL(parport_find_device);
- EXPORT_SYMBOL(parport_find_class);
- #endif
- void inc_parport_count(void)
- {
- #ifdef MODULE
- MOD_INC_USE_COUNT;
- #endif
- }
- void dec_parport_count(void)
- {
- #ifdef MODULE
- MOD_DEC_USE_COUNT;
- #endif
- }