xref: /openbmc/linux/drivers/scsi/imm.h (revision 6b66f09c)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 /*  Driver for the Iomega MatchMaker parallel port SCSI HBA embedded in
4  * the Iomega ZIP Plus drive
5  *
6  * (c) 1998     David Campbell
7  *
8  * Please note that I live in Perth, Western Australia. GMT+0800
9  */
10 
11 #ifndef _IMM_H
12 #define _IMM_H
13 
14 #define   IMM_VERSION   "2.05 (for Linux 2.4.0)"
15 
16 /*
17  * 10 Apr 1998 (Good Friday) - Received EN144302 by email from Iomega.
18  * Scarry thing is the level of support from one of their managers.
19  * The onus is now on us (the developers) to shut up and start coding.
20  *                                              11Apr98 [ 0.10 ]
21  *
22  * --- SNIP ---
23  *
24  * It manages to find the drive which is a good start. Writing data during
25  * data phase is known to be broken (due to requirements of two byte writes).
26  * Removing "Phase" debug messages.
27  *
28  * PS: Took four hours of coding after I bought a drive.
29  *      ANZAC Day (Aus "War Veterans Holiday")  25Apr98 [ 0.14 ]
30  *
31  * Ten minutes later after a few fixes.... (LITERALLY!!!)
32  * Have mounted disk, copied file, dismounted disk, remount disk, diff file
33  *                    -----  It actually works!!! -----
34  *                                              25Apr98 [ 0.15 ]
35  *
36  * Twenty minutes of mucking around, rearanged the IEEE negotiate mechanism.
37  * Now have byte mode working (only EPP and ECP to go now... :=)
38  *                                              26Apr98 [ 0.16 ]
39  *
40  * Thirty minutes of further coding results in EPP working on my machine.
41  *                                              27Apr98 [ 0.17 ]
42  *
43  * Due to work commitments and inability to get a "true" ECP mode functioning
44  * I have decided to code the parport support into imm.
45  *                                              09Jun98 [ 0.18 ]
46  *
47  * Driver is now out of beta testing.
48  * Support for parport has been added.
49  * Now distributed with the ppa driver.
50  *                                              12Jun98 [ 2.00 ]
51  *
52  * Err.. It appears that imm-2.00 was broken....
53  *                                              18Jun98 [ 2.01 ]
54  *
55  * Patch applied to sync this against the Linux 2.1.x kernel code
56  * Included qboot_zip.sh
57  *                                              21Jun98 [ 2.02 ]
58  *
59  * Other clean ups include the follow changes:
60  *    CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16
61  *    added CONFIG_SCSI_IZIP_SLOW_CTR option
62  *                                                      [2.03]
63  *  Fix kernel panic on scsi timeout.		20Aug00 [2.04]
64  *
65  *  Avoid io_request_lock problems.
66  *  John Cavan <johncavan@home.com>		16Nov00 [2.05]
67  */
68 /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
69 
70 #include  <linux/stddef.h>
71 #include  <linux/module.h>
72 #include  <linux/kernel.h>
73 #include  <linux/ioport.h>
74 #include  <linux/delay.h>
75 #include  <linux/proc_fs.h>
76 #include  <linux/stat.h>
77 #include  <linux/blkdev.h>
78 #include  <linux/sched.h>
79 #include  <linux/interrupt.h>
80 
81 #include  <asm/io.h>
82 #include  <scsi/scsi_host.h>
83 /* batteries not included :-) */
84 
85 /*
86  * modes in which the driver can operate
87  */
88 #define   IMM_AUTODETECT        0	/* Autodetect mode                */
89 #define   IMM_NIBBLE            1	/* work in standard 4 bit mode    */
90 #define   IMM_PS2               2	/* PS/2 byte mode         */
91 #define   IMM_EPP_8             3	/* EPP mode, 8 bit                */
92 #define   IMM_EPP_16            4	/* EPP mode, 16 bit               */
93 #define   IMM_EPP_32            5	/* EPP mode, 32 bit               */
94 #define   IMM_UNKNOWN           6	/* Just in case...                */
95 
96 static char *IMM_MODE_STRING[] =
97 {
98 	[IMM_AUTODETECT] = "Autodetect",
99 	[IMM_NIBBLE]	 = "SPP",
100 	[IMM_PS2]	 = "PS/2",
101 	[IMM_EPP_8]	 = "EPP 8 bit",
102 	[IMM_EPP_16]	 = "EPP 16 bit",
103 #ifdef CONFIG_SCSI_IZIP_EPP16
104 	[IMM_EPP_32]	 = "EPP 16 bit",
105 #else
106 	[IMM_EPP_32]	 = "EPP 32 bit",
107 #endif
108 	[IMM_UNKNOWN]	 = "Unknown",
109 };
110 
111 /* other options */
112 #define IMM_BURST_SIZE	512	/* data burst size */
113 #define IMM_SELECT_TMO  500	/* 500 how long to wait for target ? */
114 #define IMM_SPIN_TMO    5000	/* 50000 imm_wait loop limiter */
115 #define IMM_DEBUG	0	/* debugging option */
116 #define IN_EPP_MODE(x) (x == IMM_EPP_8 || x == IMM_EPP_16 || x == IMM_EPP_32)
117 
118 /* args to imm_connect */
119 #define CONNECT_EPP_MAYBE 1
120 #define CONNECT_NORMAL  0
121 
122 #define r_dtr(x)        (unsigned char)inb((x))
123 #define r_str(x)        (unsigned char)inb((x)+1)
124 #define r_ctr(x)        (unsigned char)inb((x)+2)
125 #define r_epp(x)        (unsigned char)inb((x)+4)
126 #define r_fifo(x)       (unsigned char)inb((x))   /* x must be base_hi */
127 					/* On PCI is: base+0x400 != base_hi */
128 #define r_ecr(x)        (unsigned char)inb((x)+2) /* x must be base_hi */
129 
130 #define w_dtr(x,y)      outb(y, (x))
131 #define w_str(x,y)      outb(y, (x)+1)
132 #define w_epp(x,y)      outb(y, (x)+4)
133 #define w_fifo(x,y)     outb(y, (x))     /* x must be base_hi */
134 #define w_ecr(x,y)      outb(y, (x)+0x2) /* x must be base_hi */
135 
136 #ifdef CONFIG_SCSI_IZIP_SLOW_CTR
137 #define w_ctr(x,y)      outb_p(y, (x)+2)
138 #else
139 #define w_ctr(x,y)      outb(y, (x)+2)
140 #endif
141 
imm_scsi_pointer(struct scsi_cmnd * cmd)142 static inline struct scsi_pointer *imm_scsi_pointer(struct scsi_cmnd *cmd)
143 {
144 	return scsi_cmd_priv(cmd);
145 }
146 
147 static int imm_engine(imm_struct *, struct scsi_cmnd *);
148 
149 #endif				/* _IMM_H */
150