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1.1 root 1: /* Driver for the PPA3 parallel port SCSI HBA embedded in
2: * the Iomega ZIP drive
3: *
4: * (c) 1996 Grant R. Guenther [email protected]
5: * David Campbell [email protected]
6: *
7: * All comments to David.
8: */
9:
10: #include <linux/config.h> /* CONFIG_SCSI_PPA_HAVE_PEDANTIC */
11: #ifndef _PPA_H
12: #define _PPA_H
13:
14: #define PPA_VERSION "1.42"
15:
16: #if 0
17: /* Use the following to enable certain chipset support
18: * Default is PEDANTIC = 3
19: */
20: #ifndef CONFIG_SCSI_PPA_HAVE_PEDANTIC
21: #define CONFIG_SCSI_PPA_HAVE_PEDANTIC 3
22: #endif
23: #endif
24:
25: /*
26: * this driver has been hacked by Matteo Frigo ([email protected])
27: * to support EPP and scatter-gather. [0.26-athena]
28: *
29: * additional hacks by David Campbell
30: * in response to this driver "mis-behaving" on his machine.
31: * Fixed EPP to handle "software" changing of EPP port data direction.
32: * Chased down EPP timeouts
33: * Made this driver "kernel version friendly" [0.28-athena]
34: *
35: * [ Stuff removed ]
36: *
37: * Compiled against 2.1.53.
38: * Rebuilt ppa_abort() function, should handle unplugged cable.
39: * [1.35s]
40: *
41: * PPA now auto probes for EPP on base address which are aligned on
42: * 8 byte boundaries (0x278 & 0x378) using the attached devices.
43: * This hopefully avoids the nasty problem of trying to detect EPP.
44: * Tested on 2.1.53 [1.36]
45: *
46: * The id_probe utility no longer performs read/write tests.
47: * Additional code included for checking the Intel ECP bug
48: * (Bit 0 of STR stuck low which fools the EPP detection routine)
49: * [1.37]
50: *
51: * Oops! Got the bit sign mixed up for the Intel bug check.
52: * Found that an additional delay is required during SCSI resets
53: * to allow devices to settle down.
54: * [1.38]
55: *
56: * Fixed all problems in the parport sharing scheme. Now ppa can be safe
57: * used with lp or other parport devices on the same parallel port.
58: * 1997 by Andrea Arcangeli
59: * [1.39]
60: *
61: * Little fix in ppa engine to ensure that ppa don' t release parport
62: * or disconnect in wrong cases.
63: * 1997 by Andrea Arcangeli
64: * [1.40]
65: *
66: * Corrected ppa.h for 2.1.x kernels (>=2.1.85)
67: * Modified "Nat Semi Kludge" for extended chipsets
68: * [1.41]
69: *
70: * Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7)
71: * [1.42]
72: */
73: /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
74:
75: #ifdef PPA_CODE
76: #include <linux/stddef.h>
77: #include <linux/module.h>
78: #include <linux/kernel.h>
79: #include <linux/tqueue.h>
80: #include <linux/ioport.h>
81: #include <linux/delay.h>
82: #include <linux/proc_fs.h>
83: #include <linux/stat.h>
84: #include <linux/blk.h>
85: #include <linux/sched.h>
86: #include <linux/interrupt.h>
87:
88: #include <asm/io.h>
89: #include "sd.h"
90: #include "hosts.h"
91: /* batteries not included :-) */
92:
93: /*
94: * modes in which the driver can operate
95: */
96: #define PPA_AUTODETECT 0 /* Autodetect mode */
97: #define PPA_NIBBLE 1 /* work in standard 4 bit mode */
98: #define PPA_PS2 2 /* PS/2 byte mode */
99: #define PPA_EPP_8 3 /* EPP mode, 8 bit */
100: #define PPA_EPP_16 4 /* EPP mode, 16 bit */
101: #define PPA_EPP_32 5 /* EPP mode, 32 bit */
102: #define PPA_UNKNOWN 6 /* Just in case... */
103:
104: static char *PPA_MODE_STRING[] =
105: {
106: "Autodetect",
107: "SPP",
108: "PS/2",
109: "EPP 8 bit",
110: "EPP 16 bit",
111: "EPP 32 bit",
112: "Unknown"};
113:
114: /* This is a global option */
115: int ppa_sg = SG_ALL; /* enable/disable scatter-gather. */
116:
117: /* other options */
118: #define PPA_CAN_QUEUE 1 /* use "queueing" interface */
119: #define PPA_BURST_SIZE 512 /* data burst size */
120: #define PPA_SELECT_TMO 5000 /* how long to wait for target ? */
121: #define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */
122: #define PPA_DEBUG 0 /* debuging option */
123: #define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32)
124:
125: /* args to ppa_connect */
126: #define CONNECT_EPP_MAYBE 1
127: #define CONNECT_NORMAL 0
128:
129: #define r_dtr(x) (unsigned char)inb((x))
130: #define r_str(x) (unsigned char)inb((x)+1)
131: #define r_ctr(x) (unsigned char)inb((x)+2)
132: #define r_epp(x) (unsigned char)inb((x)+4)
133: #define r_fifo(x) (unsigned char)inb((x)+0x400)
134: #define r_ecr(x) (unsigned char)inb((x)+0x402)
135:
136: #define w_dtr(x,y) outb(y, (x))
137: #define w_str(x,y) outb(y, (x)+1)
138: #define w_ctr(x,y) outb(y, (x)+2)
139: #define w_epp(x,y) outb(y, (x)+4)
140: #define w_fifo(x,y) outb(y, (x)+0x400)
141: #define w_ecr(x,y) outb(y, (x)+0x402)
142:
143: static int ppa_engine(ppa_struct *, Scsi_Cmnd *);
144: static int ppa_in(int, char *, int);
145: static int ppa_init(int);
146: static void ppa_interrupt(void *);
147: static int ppa_out(int, char *, int);
148:
149: struct proc_dir_entry proc_scsi_ppa =
150: {PROC_SCSI_PPA, 3, "ppa", S_IFDIR | S_IRUGO | S_IXUGO, 2};
151: #else
152: extern struct proc_dir_entry proc_scsi_ppa;
153: #endif
154:
155: int ppa_detect(Scsi_Host_Template *);
156: const char *ppa_info(struct Scsi_Host *);
157: int ppa_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *));
158: int ppa_abort(Scsi_Cmnd *);
159: int ppa_reset(Scsi_Cmnd *, unsigned int);
160: int ppa_proc_info(char *, char **, off_t, int, int, int);
161: int ppa_biosparam(Disk *, kdev_t, int *);
162:
163: #define PPA { proc_dir: &proc_scsi_ppa, \
164: proc_info: ppa_proc_info, \
165: name: "Iomega parport ZIP drive", \
166: detect: ppa_detect, \
167: queuecommand: ppa_queuecommand, \
168: abort: ppa_abort, \
169: reset: ppa_reset, \
170: bios_param: ppa_biosparam, \
171: this_id: -1, \
172: sg_tablesize: SG_ALL, \
173: cmd_per_lun: 1, \
174: use_clustering: ENABLE_CLUSTERING \
175: }
176: #endif /* _PPA_H */
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