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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [scsi/] [ppa.h] - Rev 1772
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/* 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. */ #include <linux/config.h> /* CONFIG_SCSI_PPA_HAVE_PEDANTIC */ #ifndef _PPA_H #define _PPA_H #define PPA_VERSION "1.42" #if 0 /* Use the following to enable certain chipset support * Default is PEDANTIC = 3 */ #ifndef CONFIG_SCSI_PPA_HAVE_PEDANTIC #define CONFIG_SCSI_PPA_HAVE_PEDANTIC 3 #endif #endif /* * 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 ] * * Compiled against 2.1.53. * Rebuilt ppa_abort() function, should handle unplugged cable. * [1.35s] * * PPA now auto probes for EPP on base address which are aligned on * 8 byte boundaries (0x278 & 0x378) using the attached devices. * This hopefully avoids the nasty problem of trying to detect EPP. * Tested on 2.1.53 [1.36] * * The id_probe utility no longer performs read/write tests. * Additional code included for checking the Intel ECP bug * (Bit 0 of STR stuck low which fools the EPP detection routine) * [1.37] * * Oops! Got the bit sign mixed up for the Intel bug check. * Found that an additional delay is required during SCSI resets * to allow devices to settle down. * [1.38] * * Fixed all problems in the parport sharing scheme. Now ppa can be safe * used with lp or other parport devices on the same parallel port. * 1997 by Andrea Arcangeli * [1.39] * * Little fix in ppa engine to ensure that ppa don' t release parport * or disconnect in wrong cases. * 1997 by Andrea Arcangeli * [1.40] * * 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] */ /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */ #ifdef PPA_CODE #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", "EPP 32 bit", "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_DEBUG 0 /* debuging 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)+0x400) #define r_ecr(x) (unsigned char)inb((x)+0x402) #define w_dtr(x,y) outb(y, (x)) #define w_str(x,y) outb(y, (x)+1) #define w_ctr(x,y) outb(y, (x)+2) #define w_epp(x,y) outb(y, (x)+4) #define w_fifo(x,y) outb(y, (x)+0x400) #define w_ecr(x,y) outb(y, (x)+0x402) 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); struct proc_dir_entry proc_scsi_ppa = {PROC_SCSI_PPA, 3, "ppa", S_IFDIR | S_IRUGO | S_IXUGO, 2}; #else extern struct proc_dir_entry proc_scsi_ppa; #endif int ppa_detect(Scsi_Host_Template *); const char *ppa_info(struct Scsi_Host *); int ppa_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *)); int ppa_abort(Scsi_Cmnd *); int ppa_reset(Scsi_Cmnd *, unsigned int); int ppa_proc_info(char *, char **, off_t, int, int, int); int ppa_biosparam(Disk *, kdev_t, int *); #define PPA { proc_dir: &proc_scsi_ppa, \ proc_info: ppa_proc_info, \ name: "Iomega parport ZIP drive", \ detect: ppa_detect, \ queuecommand: ppa_queuecommand, \ abort: ppa_abort, \ reset: ppa_reset, \ bios_param: ppa_biosparam, \ this_id: -1, \ sg_tablesize: SG_ALL, \ cmd_per_lun: 1, \ use_clustering: ENABLE_CLUSTERING \ } #endif /* _PPA_H */
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