diff options
Diffstat (limited to 'linux/src/drivers/scsi/ppa.h')
| -rw-r--r-- | linux/src/drivers/scsi/ppa.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/linux/src/drivers/scsi/ppa.h b/linux/src/drivers/scsi/ppa.h new file mode 100644 index 0000000..1497c20 --- /dev/null +++ b/linux/src/drivers/scsi/ppa.h @@ -0,0 +1,176 @@ +/* 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 */ |