ppa.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:6k
- /* Driver for the PPA3 parallel port SCSI HBA embedded in
- * the Iomega ZIP drive
- *
- * (c) 1996 Grant R. Guenther grant@torque.net
- * David Campbell campbell@torque.net
- *
- * All comments to David.
- */
- #ifndef _PPA_H
- #define _PPA_H
- #define PPA_VERSION "2.07 (for Linux 2.4.x)"
- /*
- * this driver has been hacked by Matteo Frigo (athena@theory.lcs.mit.edu)
- * to support EPP and scatter-gather. [0.26-athena]
- *
- * additional hacks by David Campbell
- * in response to this driver "mis-behaving" on his machine.
- * Fixed EPP to handle "software" changing of EPP port data direction.
- * Chased down EPP timeouts
- * Made this driver "kernel version friendly" [0.28-athena]
- *
- * [ Stuff removed ]
- *
- * Corrected ppa.h for 2.1.x kernels (>=2.1.85)
- * Modified "Nat Semi Kludge" for extended chipsets
- * [1.41]
- *
- * Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7)
- * [1.42]
- *
- * Development solely for 2.1.x kernels from now on!
- * [2.00]
- *
- * Hack and slash at the init code (EPP device check routine)
- * Added INSANE option.
- * [2.01]
- *
- * Patch applied to sync against the 2.1.x kernel code
- * Included qboot_zip.sh
- * [2.02]
- *
- * Cleaned up the mess left by someone else trying to fix the
- * asm section to keep egcc happy. The asm section no longer
- * exists, the nibble code is *almost* as fast as the asm code
- * providing it is compiled with egcc.
- *
- * Other clean ups include the follow changes:
- * CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16
- * added CONFIG_SCSI_IZIP_SLOW_CTR option
- * [2.03]
- *
- * Use ppa_wait() to check for ready AND connected status bits
- * Add ppa_wait() calls to ppa_completion()
- * by Peter Cherriman <pjc@ecs.soton.ac.uk> and
- * Tim Waugh <twaugh@redhat.com>
- * [2.04]
- *
- * Fix kernel panic on scsi timeout, 2000-08-18 [2.05]
- *
- * Avoid io_request_lock problems.
- * John Cavan <johncavan@home.com> [2.06]
- *
- * Busy wait for connected status bit in ppa_completion()
- * in order to cope with some hardware that has this bit low
- * for short periods of time.
- * Add udelay() to ppa_select()
- * by Peter Cherriman <pjc@ecs.soton.ac.uk> and
- * Oleg Makarenko <omakarenko@cyberplat.ru>
- * [2.07]
- */
- /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
- #ifdef PPA_CODE
- #include <linux/config.h>
- #include <linux/stddef.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/tqueue.h>
- #include <linux/ioport.h>
- #include <linux/delay.h>
- #include <linux/proc_fs.h>
- #include <linux/stat.h>
- #include <linux/blk.h>
- #include <linux/sched.h>
- #include <linux/interrupt.h>
- #include <asm/io.h>
- #include "sd.h"
- #include "hosts.h"
- /* batteries not included :-) */
- /*
- * modes in which the driver can operate
- */
- #define PPA_AUTODETECT 0 /* Autodetect mode */
- #define PPA_NIBBLE 1 /* work in standard 4 bit mode */
- #define PPA_PS2 2 /* PS/2 byte mode */
- #define PPA_EPP_8 3 /* EPP mode, 8 bit */
- #define PPA_EPP_16 4 /* EPP mode, 16 bit */
- #define PPA_EPP_32 5 /* EPP mode, 32 bit */
- #define PPA_UNKNOWN 6 /* Just in case... */
- static char *PPA_MODE_STRING[] =
- {
- "Autodetect",
- "SPP",
- "PS/2",
- "EPP 8 bit",
- "EPP 16 bit",
- #ifdef CONFIG_SCSI_IZIP_EPP16
- "EPP 16 bit",
- #else
- "EPP 32 bit",
- #endif
- "Unknown"};
- /* This is a global option */
- int ppa_sg = SG_ALL; /* enable/disable scatter-gather. */
- /* other options */
- #define PPA_CAN_QUEUE 1 /* use "queueing" interface */
- #define PPA_BURST_SIZE 512 /* data burst size */
- #define PPA_SELECT_TMO 5000 /* how long to wait for target ? */
- #define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */
- #define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */
- #define PPA_DEBUG 0 /* debugging option */
- #define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32)
- /* args to ppa_connect */
- #define CONNECT_EPP_MAYBE 1
- #define CONNECT_NORMAL 0
- #define r_dtr(x) (unsigned char)inb((x))
- #define r_str(x) (unsigned char)inb((x)+1)
- #define r_ctr(x) (unsigned char)inb((x)+2)
- #define r_epp(x) (unsigned char)inb((x)+4)
- #define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */
- /* On PCI is base+0x400 != base_hi */
- #define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */
- #define w_dtr(x,y) outb(y, (x))
- #define w_str(x,y) outb(y, (x)+1)
- #define w_epp(x,y) outb(y, (x)+4)
- #define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */
- #define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */
- #ifdef CONFIG_SCSI_IZIP_SLOW_CTR
- #define w_ctr(x,y) outb_p(y, (x)+2)
- #else
- #define w_ctr(x,y) outb(y, (x)+2)
- #endif
- static int ppa_engine(ppa_struct *, Scsi_Cmnd *);
- static int ppa_in(int, char *, int);
- static int ppa_init(int);
- static void ppa_interrupt(void *);
- static int ppa_out(int, char *, int);
- #else
- #define ppa_release 0
- #endif
- int ppa_detect(Scsi_Host_Template *);
- const char *ppa_info(struct Scsi_Host *);
- int ppa_command(Scsi_Cmnd *);
- int ppa_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *));
- int ppa_abort(Scsi_Cmnd *);
- int ppa_reset(Scsi_Cmnd *);
- int ppa_proc_info(char *, char **, off_t, int, int, int);
- int ppa_biosparam(Disk *, kdev_t, int *);
- #define PPA { proc_name: "ppa",
- proc_info: ppa_proc_info,
- name: "Iomega VPI0 (ppa) interface",
- detect: ppa_detect,
- release: ppa_release,
- command: ppa_command,
- queuecommand: ppa_queuecommand,
- eh_abort_handler: ppa_abort,
- eh_device_reset_handler: NULL,
- eh_bus_reset_handler: ppa_reset,
- eh_host_reset_handler: ppa_reset,
- use_new_eh_code: 1,
- bios_param: ppa_biosparam,
- this_id: -1,
- sg_tablesize: SG_ALL,
- cmd_per_lun: 1,
- use_clustering: ENABLE_CLUSTERING
- }
- #endif /* _PPA_H */