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1 | /* Driver for the PPA3 parallel port SCSI HBA embedded in |
2 | * the Iomega ZIP drive |
3 | * |
4 | * (c) 1996 Grant R. Guenther grant@torque.net |
5 | * David Campbell |
6 | * |
7 | * All comments to David. |
8 | */ |
9 | |
10 | #ifndef _PPA_H |
11 | #define _PPA_H |
12 | |
13 | #define PPA_VERSION "2.07 (for Linux 2.4.x)" |
14 | |
15 | /* |
16 | * this driver has been hacked by Matteo Frigo (athena@theory.lcs.mit.edu) |
17 | * to support EPP and scatter-gather. [0.26-athena] |
18 | * |
19 | * additional hacks by David Campbell |
20 | * in response to this driver "mis-behaving" on his machine. |
21 | * Fixed EPP to handle "software" changing of EPP port data direction. |
22 | * Chased down EPP timeouts |
23 | * Made this driver "kernel version friendly" [0.28-athena] |
24 | * |
25 | * [ Stuff removed ] |
26 | * |
27 | * Corrected ppa.h for 2.1.x kernels (>=2.1.85) |
28 | * Modified "Nat Semi Kludge" for extended chipsets |
29 | * [1.41] |
30 | * |
31 | * Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7) |
32 | * [1.42] |
33 | * |
34 | * Development solely for 2.1.x kernels from now on! |
35 | * [2.00] |
36 | * |
37 | * Hack and slash at the init code (EPP device check routine) |
38 | * Added INSANE option. |
39 | * [2.01] |
40 | * |
41 | * Patch applied to sync against the 2.1.x kernel code |
42 | * Included qboot_zip.sh |
43 | * [2.02] |
44 | * |
45 | * Cleaned up the mess left by someone else trying to fix the |
46 | * asm section to keep egcc happy. The asm section no longer |
47 | * exists, the nibble code is *almost* as fast as the asm code |
48 | * providing it is compiled with egcc. |
49 | * |
50 | * Other clean ups include the follow changes: |
51 | * CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16 |
52 | * added CONFIG_SCSI_IZIP_SLOW_CTR option |
53 | * [2.03] |
54 | * |
55 | * Use ppa_wait() to check for ready AND connected status bits |
56 | * Add ppa_wait() calls to ppa_completion() |
57 | * by Peter Cherriman <pjc@ecs.soton.ac.uk> and |
58 | * Tim Waugh <twaugh@redhat.com> |
59 | * [2.04] |
60 | * |
61 | * Fix kernel panic on scsi timeout, 2000-08-18 [2.05] |
62 | * |
63 | * Avoid io_request_lock problems. |
64 | * John Cavan <johncavan@home.com> [2.06] |
65 | * |
66 | * Busy wait for connected status bit in ppa_completion() |
67 | * in order to cope with some hardware that has this bit low |
68 | * for short periods of time. |
69 | * Add udelay() to ppa_select() |
70 | * by Peter Cherriman <pjc@ecs.soton.ac.uk> and |
71 | * Oleg Makarenko <omakarenko@cyberplat.ru> |
72 | * [2.07] |
73 | */ |
74 | /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */ |
75 | |
76 | #include <linux/stddef.h> |
77 | #include <linux/module.h> |
78 | #include <linux/kernel.h> |
79 | #include <linux/ioport.h> |
80 | #include <linux/delay.h> |
81 | #include <linux/proc_fs.h> |
82 | #include <linux/stat.h> |
83 | #include <linux/blkdev.h> |
84 | #include <linux/sched.h> |
85 | #include <linux/interrupt.h> |
86 | |
87 | #include <asm/io.h> |
88 | #include <scsi/scsi_host.h> |
89 | /* batteries not included :-) */ |
90 | |
91 | /* |
92 | * modes in which the driver can operate |
93 | */ |
94 | #define PPA_AUTODETECT 0 /* Autodetect mode */ |
95 | #define PPA_NIBBLE 1 /* work in standard 4 bit mode */ |
96 | #define PPA_PS2 2 /* PS/2 byte mode */ |
97 | #define PPA_EPP_8 3 /* EPP mode, 8 bit */ |
98 | #define PPA_EPP_16 4 /* EPP mode, 16 bit */ |
99 | #define PPA_EPP_32 5 /* EPP mode, 32 bit */ |
100 | #define PPA_UNKNOWN 6 /* Just in case... */ |
101 | |
102 | static char *PPA_MODE_STRING[] = |
103 | { |
104 | "Autodetect", |
105 | "SPP", |
106 | "PS/2", |
107 | "EPP 8 bit", |
108 | "EPP 16 bit", |
109 | #ifdef CONFIG_SCSI_IZIP_EPP16 |
110 | "EPP 16 bit", |
111 | #else |
112 | "EPP 32 bit", |
113 | #endif |
114 | "Unknown"}; |
115 | |
116 | /* other options */ |
117 | #define PPA_BURST_SIZE 512 /* data burst size */ |
118 | #define PPA_SELECT_TMO 5000 /* how long to wait for target ? */ |
119 | #define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */ |
120 | #define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */ |
121 | #define PPA_DEBUG 0 /* debugging option */ |
122 | #define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32) |
123 | |
124 | /* args to ppa_connect */ |
125 | #define CONNECT_EPP_MAYBE 1 |
126 | #define CONNECT_NORMAL 0 |
127 | |
128 | #define r_dtr(x) (unsigned char)inb((x)) |
129 | #define r_str(x) (unsigned char)inb((x)+1) |
130 | #define r_ctr(x) (unsigned char)inb((x)+2) |
131 | #define r_epp(x) (unsigned char)inb((x)+4) |
132 | #define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */ |
133 | /* On PCI is base+0x400 != base_hi */ |
134 | #define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */ |
135 | |
136 | #define w_dtr(x,y) outb(y, (x)) |
137 | #define w_str(x,y) outb(y, (x)+1) |
138 | #define w_epp(x,y) outb(y, (x)+4) |
139 | #define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */ |
140 | #define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */ |
141 | |
142 | #ifdef CONFIG_SCSI_IZIP_SLOW_CTR |
143 | #define w_ctr(x,y) outb_p(y, (x)+2) |
144 | #else |
145 | #define w_ctr(x,y) outb(y, (x)+2) |
146 | #endif |
147 | |
148 | static int ppa_engine(ppa_struct *, struct scsi_cmnd *); |
149 | |
150 | #endif /* _PPA_H */ |
151 |
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