[net-next-2.6.git] / drivers / block / paride / bpck6.c

/*
	backpack.c (c) 2001 Micro Solutions Inc.
		Released under the terms of the GNU General Public license

	backpack.c is a low-level protocol driver for the Micro Solutions
		"BACKPACK" parallel port IDE adapter
		(Works on Series 6 drives)

	Written by: Ken Hahn     (linux-dev@micro-solutions.com)
	            Clive Turvey (linux-dev@micro-solutions.com)

*/

/*
   This is Ken's linux wrapper for the PPC library
   Version 1.0.0 is the backpack driver for which source is not available
   Version 2.0.0 is the first to have source released 
   Version 2.0.1 is the "Cox-ified" source code 
   Version 2.0.2 - fixed version string usage, and made ppc functions static 
*/


/* PARAMETERS */
static int verbose; /* set this to 1 to see debugging messages and whatnot */

#define BACKPACK_VERSION "2.0.2"

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <asm/io.h>

#if defined(CONFIG_PARPORT_MODULE)||defined(CONFIG_PARPORT)
#include <linux/parport.h>
#endif

#include "ppc6lnx.c"
#include "paride.h"

 
#define PPCSTRUCT(pi) ((Interface *)(pi->private))

/****************************************************************/
/*
 ATAPI CDROM DRIVE REGISTERS
*/
#define ATAPI_DATA       0      /* data port                  */
#define ATAPI_ERROR      1      /* error register (read)      */
#define ATAPI_FEATURES   1      /* feature register (write)   */
#define ATAPI_INT_REASON 2      /* interrupt reason register  */
#define ATAPI_COUNT_LOW  4      /* byte count register (low)  */
#define ATAPI_COUNT_HIGH 5      /* byte count register (high) */
#define ATAPI_DRIVE_SEL  6      /* drive select register      */
#define ATAPI_STATUS     7      /* status port (read)         */
#define ATAPI_COMMAND    7      /* command port (write)       */
#define ATAPI_ALT_STATUS 0x0e /* alternate status reg (read) */
#define ATAPI_DEVICE_CONTROL 0x0e /* device control (write)   */
/****************************************************************/

static int bpck6_read_regr(PIA *pi, int cont, int reg)
{
	unsigned int out;

	/* check for bad settings */
	if (reg<0 || reg>7 || cont<0 || cont>2)
	{
		return(-1);
	}
	out=ppc6_rd_port(PPCSTRUCT(pi),cont?reg|8:reg);
	return(out);
}

static void bpck6_write_regr(PIA *pi, int cont, int reg, int val)
{
	/* check for bad settings */
	if (reg>=0 && reg<=7 && cont>=0 && cont<=1)
	{
		ppc6_wr_port(PPCSTRUCT(pi),cont?reg|8:reg,(u8)val);
	}
}

static void bpck6_write_block( PIA *pi, char * buf, int len )
{
	ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1); 
}

static void bpck6_read_block( PIA *pi, char * buf, int len )
{
	ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
}

static void bpck6_connect ( PIA *pi  )
{
	if(verbose)
	{
		printk(KERN_DEBUG "connect\n");
	}

	if(pi->mode >=2)
  	{
		PPCSTRUCT(pi)->mode=4+pi->mode-2;	
	}
	else if(pi->mode==1)
	{
		PPCSTRUCT(pi)->mode=3;	
	}
	else
	{
		PPCSTRUCT(pi)->mode=1;		
	}

	ppc6_open(PPCSTRUCT(pi));  
	ppc6_wr_extout(PPCSTRUCT(pi),0x3);
}

static void bpck6_disconnect ( PIA *pi )
{
	if(verbose)
	{
		printk("disconnect\n");
	}
	ppc6_wr_extout(PPCSTRUCT(pi),0x0);
	ppc6_close(PPCSTRUCT(pi));
}

static int bpck6_test_port ( PIA *pi )   /* check for 8-bit port */
{
	if(verbose)
	{
		printk(KERN_DEBUG "PARPORT indicates modes=%x for lp=0x%lx\n",
               		((struct pardevice*)(pi->pardev))->port->modes,
			((struct pardevice *)(pi->pardev))->port->base); 
	}

	/*copy over duplicate stuff.. initialize state info*/
	PPCSTRUCT(pi)->ppc_id=pi->unit;
	PPCSTRUCT(pi)->lpt_addr=pi->port;

#ifdef CONFIG_PARPORT_PC_MODULE
#define CONFIG_PARPORT_PC
#endif

#ifdef CONFIG_PARPORT_PC
	/* look at the parport device to see if what modes we can use */
	if(((struct pardevice *)(pi->pardev))->port->modes & 
		(PARPORT_MODE_EPP)
          )
	{
		return 5; /* Can do EPP*/
	}
	else if(((struct pardevice *)(pi->pardev))->port->modes & 
			(PARPORT_MODE_TRISTATE)
               )
	{
		return 2;
	}
	else /*Just flat SPP*/
	{
		return 1;
	}
#else
	/* there is no way of knowing what kind of port we have
	   default to the highest mode possible */
	return 5;
#endif
}

static int bpck6_probe_unit ( PIA *pi )
{
	int out;

	if(verbose)
	{
		printk(KERN_DEBUG "PROBE UNIT %x on port:%x\n",pi->unit,pi->port);
	}

	/*SET PPC UNIT NUMBER*/
	PPCSTRUCT(pi)->ppc_id=pi->unit;

	/*LOWER DOWN TO UNIDIRECTIONAL*/
	PPCSTRUCT(pi)->mode=1;		

	out=ppc6_open(PPCSTRUCT(pi));

	if(verbose)
	{
		printk(KERN_DEBUG "ppc_open returned %2x\n",out);
	}

  	if(out)
 	{
		ppc6_close(PPCSTRUCT(pi));
		if(verbose)
		{
			printk(KERN_DEBUG "leaving probe\n");
		}
               return(1);
	}
  	else
  	{
		if(verbose)
		{
			printk(KERN_DEBUG "Failed open\n");
		}
    		return(0);
  	}
}

static void bpck6_log_adapter( PIA *pi, char * scratch, int verbose )
{
	char *mode_string[5]=
		{"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};

	printk("%s: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n",pi->device);
	printk("%s: Copyright 2001 by Micro Solutions, Inc., DeKalb IL.\n",pi->device);
	printk("%s: BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n",
		pi->device,BACKPACK_VERSION,pi->port);
	printk("%s: Unit: %d Mode:%d (%s) Delay %d\n",pi->device,
		pi->unit,pi->mode,mode_string[pi->mode],pi->delay);
}

static int bpck6_init_proto(PIA *pi)
{
	Interface *p = kmalloc(sizeof(Interface), GFP_KERNEL);

	if (p) {
		memset(p, 0, sizeof(Interface));
		pi->private = (unsigned long)p;
		return 0;
	}

	printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi->device); 
	return -1;
}

static void bpck6_release_proto(PIA *pi)
{
	kfree((void *)(pi->private)); 
}

static struct pi_protocol bpck6 = {
	.owner		= THIS_MODULE,
	.name		= "bpck6",
	.max_mode	= 5,
	.epp_first	= 2, /* 2-5 use epp (need 8 ports) */
	.max_units	= 255,
	.write_regr	= bpck6_write_regr,
	.read_regr	= bpck6_read_regr,
	.write_block	= bpck6_write_block,
	.read_block	= bpck6_read_block,
	.connect	= bpck6_connect,
	.disconnect	= bpck6_disconnect,
	.test_port	= bpck6_test_port,
	.probe_unit	= bpck6_probe_unit,
	.log_adapter	= bpck6_log_adapter,
	.init_proto	= bpck6_init_proto,
	.release_proto	= bpck6_release_proto,
};

static int __init bpck6_init(void)
{
	printk(KERN_INFO "bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n");
	printk(KERN_INFO "bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n");
	if(verbose)
		printk(KERN_DEBUG "bpck6: verbose debug enabled.\n");
	return pi_register(&bpck6) - 1;  
}

static void __exit bpck6_exit(void)
{
	pi_unregister(&bpck6);
}

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Micro Solutions Inc.");
MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
module_param(verbose, bool, 0644);
module_init(bpck6_init)
module_exit(bpck6_exit)
Commit	Line	Data
1da177e4 LT	1	/*
	2	backpack.c (c) 2001 Micro Solutions Inc.
	3	Released under the terms of the GNU General Public license
	4
	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)
	8
	9	Written by: Ken Hahn (linux-dev@micro-solutions.com)
	10	Clive Turvey (linux-dev@micro-solutions.com)
	11
	12	*/
	13
	14	/*
	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
	20	*/
	21
	22
	23	/* PARAMETERS */
	24	static int verbose; /* set this to 1 to see debugging messages and whatnot */
	25
	26	#define BACKPACK_VERSION "2.0.2"
	27
	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>
	33	#include <asm/io.h>
	34
	35	#if defined(CONFIG_PARPORT_MODULE)\|\|defined(CONFIG_PARPORT)
	36	#include <linux/parport.h>
	37	#endif
	38
	39	#include "ppc6lnx.c"
	40	#include "paride.h"
	41
	42
	43
	44	#define PPCSTRUCT(pi) ((Interface *)(pi->private))
	45
	46	/****************************************************************/
	47	/*
	48	ATAPI CDROM DRIVE REGISTERS
	49	*/
	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	/****************************************************************/
	62
	63	static int bpck6_read_regr(PIA *pi, int cont, int reg)
	64	{
65	unsigned int out;
66
67	/* check for bad settings */
68	if (reg<0 \|\| reg>7 \|\| cont<0 \|\| cont>2)
69	{
70	return(-1);
71	}
72	out=ppc6_rd_port(PPCSTRUCT(pi),cont?reg\|8:reg);
73	return(out);
74	}
75
76	static void bpck6_write_regr(PIA *pi, int cont, int reg, int val)
77	{
78	/* check for bad settings */
79	if (reg>=0 && reg<=7 && cont>=0 && cont<=1)
80	{
81	ppc6_wr_port(PPCSTRUCT(pi),cont?reg\|8:reg,(u8)val);
82	}
83	}
84
85	static void bpck6_write_block( PIA pi, char buf, int len )
86	{
87	ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
88	}
89
90	static void bpck6_read_block( PIA pi, char buf, int len )
91	{
92	ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
93	}
94
95	static void bpck6_connect ( PIA *pi )
96	{
97	if(verbose)
98	{
99	printk(KERN_DEBUG "connect\n");
100	}
101
102	if(pi->mode >=2)
103	{
104	PPCSTRUCT(pi)->mode=4+pi->mode-2;
105	}
106	else if(pi->mode==1)
107	{
108	PPCSTRUCT(pi)->mode=3;
109	}
110	else
111	{
112	PPCSTRUCT(pi)->mode=1;
113	}
114
115	ppc6_open(PPCSTRUCT(pi));
116	ppc6_wr_extout(PPCSTRUCT(pi),0x3);
117	}
118
119	static void bpck6_disconnect ( PIA *pi )
120	{
121	if(verbose)
122	{
123	printk("disconnect\n");
124	}
125	ppc6_wr_extout(PPCSTRUCT(pi),0x0);
126	ppc6_close(PPCSTRUCT(pi));
127	}
128
129	static int bpck6_test_port ( PIA pi ) / check for 8-bit port */
130	{
131	if(verbose)
132	{
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);
136	}
137
138	/copy over duplicate stuff.. initialize state info/
139	PPCSTRUCT(pi)->ppc_id=pi->unit;
140	PPCSTRUCT(pi)->lpt_addr=pi->port;
141
142	#ifdef CONFIG_PARPORT_PC_MODULE
143	#define CONFIG_PARPORT_PC
144	#endif
145
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 &
149	(PARPORT_MODE_EPP)
150	)
151	{
152	return 5; /* Can do EPP*/
153	}
154	else if(((struct pardevice *)(pi->pardev))->port->modes &
155	(PARPORT_MODE_TRISTATE)
156	)
157	{
158	return 2;
159	}
160	else /Just flat SPP/
161	{
162	return 1;
163	}
164	#else
165	/* there is no way of knowing what kind of port we have
166	default to the highest mode possible */
167	return 5;
168	#endif
169	}
170
171	static int bpck6_probe_unit ( PIA *pi )
172	{
173	int out;
174
175	if(verbose)
176	{
177	printk(KERN_DEBUG "PROBE UNIT %x on port:%x\n",pi->unit,pi->port);
178	}
179
180	/SET PPC UNIT NUMBER/
181	PPCSTRUCT(pi)->ppc_id=pi->unit;
182
183	/LOWER DOWN TO UNIDIRECTIONAL/
184	PPCSTRUCT(pi)->mode=1;
185
186	out=ppc6_open(PPCSTRUCT(pi));
187
188	if(verbose)
189	{
190	printk(KERN_DEBUG "ppc_open returned %2x\n",out);
191	}
192
193	if(out)
194	{
195	ppc6_close(PPCSTRUCT(pi));
196	if(verbose)
197	{
198	printk(KERN_DEBUG "leaving probe\n");
199	}
200	return(1);
201	}
202	else
203	{
204	if(verbose)
205	{
206	printk(KERN_DEBUG "Failed open\n");
207	}
208	return(0);
209	}
210	}
211
212	static void bpck6_log_adapter( PIA pi, char scratch, int verbose )
213	{
214	char *mode_string[5]=
215	{"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
216
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);
223	}
224
225	static int bpck6_init_proto(PIA *pi)
226	{
227	Interface *p = kmalloc(sizeof(Interface), GFP_KERNEL);
228
229	if (p) {
230	memset(p, 0, sizeof(Interface));
231	pi->private = (unsigned long)p;
232	return 0;
233	}
234
235	printk(KERN_ERR "%s: ERROR COULDN'T ALLOCATE MEMORY\n", pi->device);
236	return -1;
237	}
238
239	static void bpck6_release_proto(PIA *pi)
240	{
241	kfree((void *)(pi->private));
242	}
243
244	static struct pi_protocol bpck6 = {
245	.owner = THIS_MODULE,
246	.name = "bpck6",
247	.max_mode = 5,
248	.epp_first = 2, /* 2-5 use epp (need 8 ports) */
249	.max_units = 255,
250	.write_regr = bpck6_write_regr,
251	.read_regr = bpck6_read_regr,
252	.write_block = bpck6_write_block,
253	.read_block = bpck6_read_block,
254	.connect = bpck6_connect,
255	.disconnect = bpck6_disconnect,
256	.test_port = bpck6_test_port,
257	.probe_unit = bpck6_probe_unit,
258	.log_adapter = bpck6_log_adapter,
259	.init_proto = bpck6_init_proto,
260	.release_proto = bpck6_release_proto,
261	};
262
263	static int __init bpck6_init(void)
264	{
265	printk(KERN_INFO "bpck6: BACKPACK Protocol Driver V"BACKPACK_VERSION"\n");
266	printk(KERN_INFO "bpck6: Copyright 2001 by Micro Solutions, Inc., DeKalb IL. USA\n");
267	if(verbose)
268	printk(KERN_DEBUG "bpck6: verbose debug enabled.\n");
269	return pi_register(&bpck6) - 1;
270	}
271
272	static void __exit bpck6_exit(void)
273	{
274	pi_unregister(&bpck6);
275	}
276
277	MODULE_LICENSE("GPL");
278	MODULE_AUTHOR("Micro Solutions Inc.");
279	MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
280	module_param(verbose, bool, 0644);
281	module_init(bpck6_init)
282	module_exit(bpck6_exit)