2 backpack.c (c) 2001 Micro Solutions Inc.
3 Released under the terms of the GNU General Public license
5 backpack.c is a low-level protocol driver for the Micro Solutions
6 "BACKPACK" parallel port IDE adapter
7 (Works on Series 6 drives)
9 Written by: Ken Hahn (linux-dev@micro-solutions.com)
10 Clive Turvey (linux-dev@micro-solutions.com)
15 This is Ken's linux wrapper for the PPC library
16 Version 1.0.0 is the backpack driver for which source is not available
17 Version 2.0.0 is the first to have source released
18 Version 2.0.1 is the "Cox-ified" source code
19 Version 2.0.2 - fixed version string usage, and made ppc functions static
24 static int verbose; /* set this to 1 to see debugging messages and whatnot */
26 #define BACKPACK_VERSION "2.0.2"
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/kernel.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
35 #if defined(CONFIG_PARPORT_MODULE)||defined(CONFIG_PARPORT)
36 #include <linux/parport.h>
44 #define PPCSTRUCT(pi) ((Interface *)(pi->private))
46 /****************************************************************/
48 ATAPI CDROM DRIVE REGISTERS
50 #define ATAPI_DATA 0 /* data port */
51 #define ATAPI_ERROR 1 /* error register (read) */
52 #define ATAPI_FEATURES 1 /* feature register (write) */
53 #define ATAPI_INT_REASON 2 /* interrupt reason register */
54 #define ATAPI_COUNT_LOW 4 /* byte count register (low) */
55 #define ATAPI_COUNT_HIGH 5 /* byte count register (high) */
56 #define ATAPI_DRIVE_SEL 6 /* drive select register */
57 #define ATAPI_STATUS 7 /* status port (read) */
58 #define ATAPI_COMMAND 7 /* command port (write) */
59 #define ATAPI_ALT_STATUS 0x0e /* alternate status reg (read) */
60 #define ATAPI_DEVICE_CONTROL 0x0e /* device control (write) */
61 /****************************************************************/
63 static int bpck6_read_regr(PIA *pi, int cont, int reg)
67 /* check for bad settings */
68 if (reg<0 || reg>7 || cont<0 || cont>2)
72 out=ppc6_rd_port(PPCSTRUCT(pi),cont?reg|8:reg);
76 static void bpck6_write_regr(PIA *pi, int cont, int reg, int val)
78 /* check for bad settings */
79 if (reg>=0 && reg<=7 && cont>=0 && cont<=1)
81 ppc6_wr_port(PPCSTRUCT(pi),cont?reg|8:reg,(u8)val);
85 static void bpck6_write_block( PIA *pi, char * buf, int len )
87 ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
90 static void bpck6_read_block( PIA *pi, char * buf, int len )
92 ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
95 static void bpck6_connect ( PIA *pi )
99 printk(KERN_DEBUG "connect\n");
104 PPCSTRUCT(pi)->mode=4+pi->mode-2;
108 PPCSTRUCT(pi)->mode=3;
112 PPCSTRUCT(pi)->mode=1;
115 ppc6_open(PPCSTRUCT(pi));
116 ppc6_wr_extout(PPCSTRUCT(pi),0x3);
119 static void bpck6_disconnect ( PIA *pi )
123 printk("disconnect\n");
125 ppc6_wr_extout(PPCSTRUCT(pi),0x0);
126 ppc6_close(PPCSTRUCT(pi));
129 static int bpck6_test_port ( PIA *pi ) /* check for 8-bit port */
133 printk(KERN_DEBUG "PARPORT indicates modes=%x for lp=0x%lx\n",
134 ((struct pardevice*)(pi->pardev))->port->modes,
135 ((struct pardevice *)(pi->pardev))->port->base);
138 /*copy over duplicate stuff.. initialize state info*/
139 PPCSTRUCT(pi)->ppc_id=pi->unit;
140 PPCSTRUCT(pi)->lpt_addr=pi->port;
142 #ifdef CONFIG_PARPORT_PC_MODULE
143 #define CONFIG_PARPORT_PC
146 #ifdef CONFIG_PARPORT_PC
147 /* look at the parport device to see if what modes we can use */
148 if(((struct pardevice *)(pi->pardev))->port->modes &
152 return 5; /* Can do EPP*/
154 else if(((struct pardevice *)(pi->pardev))->port->modes &
155 (PARPORT_MODE_TRISTATE)
160 else /*Just flat SPP*/
165 /* there is no way of knowing what kind of port we have
166 default to the highest mode possible */
171 static int bpck6_probe_unit ( PIA *pi )
177 printk(KERN_DEBUG "PROBE UNIT %x on port:%x\n",pi->unit,pi->port);
180 /*SET PPC UNIT NUMBER*/
181 PPCSTRUCT(pi)->ppc_id=pi->unit;
183 /*LOWER DOWN TO UNIDIRECTIONAL*/
184 PPCSTRUCT(pi)->mode=1;
186 out=ppc6_open(PPCSTRUCT(pi));
190 printk(KERN_DEBUG "ppc_open returned %2x\n",out);
195 ppc6_close(PPCSTRUCT(pi));
198 printk(KERN_DEBUG "leaving probe\n");
206 printk(KERN_DEBUG "Failed open\n");
212 static void bpck6_log_adapter( PIA *pi, char * scratch, int verbose )
214 char *mode_string[5]=
215 {"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
217 printk("%s: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n",pi->device);
218 printk("%s: Copyright 2001 by Micro Solutions, Inc., DeKalb IL.\n",pi->device);
219 printk("%s: BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n",
220 pi->device,BACKPACK_VERSION,pi->port);
221 printk("%s: Unit: %d Mode:%d (%s) Delay %d\n",pi->device,
222 pi->unit,pi->mode,mode_string[pi->mode],pi->delay);
225 static int bpck6_init_proto(PIA *pi)
227 Interface *p = kzalloc(sizeof(Interface), GFP_KERNEL);
230 pi->private = (unsigned long)p;
234 printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi->device);
238 static void bpck6_release_proto(PIA *pi)
240 kfree((void *)(pi->private));
243 static struct pi_protocol bpck6 = {
244 .owner = THIS_MODULE,
247 .epp_first = 2, /* 2-5 use epp (need 8 ports) */
249 .write_regr = bpck6_write_regr,
250 .read_regr = bpck6_read_regr,
251 .write_block = bpck6_write_block,
252 .read_block = bpck6_read_block,
253 .connect = bpck6_connect,
254 .disconnect = bpck6_disconnect,
255 .test_port = bpck6_test_port,
256 .probe_unit = bpck6_probe_unit,
257 .log_adapter = bpck6_log_adapter,
258 .init_proto = bpck6_init_proto,
259 .release_proto = bpck6_release_proto,
262 static int __init bpck6_init(void)
264 printk(KERN_INFO "bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n");
265 printk(KERN_INFO "bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n");
267 printk(KERN_DEBUG "bpck6: verbose debug enabled.\n");
268 return pi_register(&bpck6) - 1;
271 static void __exit bpck6_exit(void)
273 pi_unregister(&bpck6);
276 MODULE_LICENSE("GPL");
277 MODULE_AUTHOR("Micro Solutions Inc.");
278 MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
279 module_param(verbose, bool, 0644);
280 module_init(bpck6_init)
281 module_exit(bpck6_exit)