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/*
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
*/
#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>
#include <linux/parport.h>
#include "ppc6lnx.c"
#include <linux/pata_parport.h>
/* PARAMETERS */
static bool verbose; /* set this to 1 to see debugging messages and whatnot */
#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(struct pi_adapter *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(struct pi_adapter *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(struct pi_adapter *pi, char *buf, int len)
{
ppc6_wr_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
}
static void bpck6_read_block(struct pi_adapter *pi, char *buf, int len)
{
ppc6_rd_port16_blk(PPCSTRUCT(pi),ATAPI_DATA,buf,(u32)len>>1);
}
static void bpck6_connect(struct pi_adapter *pi)
{
dev_dbg(&pi->dev, "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(struct pi_adapter *pi)
{
dev_dbg(&pi->dev, "disconnect\n");
ppc6_wr_extout(PPCSTRUCT(pi),0x0);
ppc6_close(PPCSTRUCT(pi));
}
static int bpck6_test_port(struct pi_adapter *pi) /* check for 8-bit port */
{
dev_dbg(&pi->dev, "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;
/* 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;
}
}
static int bpck6_probe_unit(struct pi_adapter *pi)
{
int out;
dev_dbg(&pi->dev, "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));
dev_dbg(&pi->dev, "ppc_open returned %2x\n", out);
if(out)
{
ppc6_close(PPCSTRUCT(pi));
dev_dbg(&pi->dev, "leaving probe\n");
return(1);
}
else
{
dev_dbg(&pi->dev, "Failed open\n");
return(0);
}
}
static void bpck6_log_adapter(struct pi_adapter *pi)
{
char *mode_string[5]=
{"4-bit","8-bit","EPP-8","EPP-16","EPP-32"};
dev_info(&pi->dev, "BACKPACK %s, Micro Solutions BACKPACK Drive at 0x%x\n",
BACKPACK_VERSION, pi->port);
dev_info(&pi->dev, "Unit: %d Mode:%d (%s) Delay %d\n",
pi->unit,pi->mode,mode_string[pi->mode],pi->delay);
}
static int bpck6_init_proto(struct pi_adapter *pi)
{
Interface *p = kzalloc(sizeof(Interface), GFP_KERNEL);
if (p) {
pi->private = (unsigned long)p;
return 0;
}
dev_err(&pi->dev, "ERROR COULDN'T ALLOCATE MEMORY\n");
return -1;
}
static void bpck6_release_proto(struct pi_adapter *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,
};
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Micro Solutions Inc.");
MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
module_param(verbose, bool, 0644);
module_pata_parport_driver(bpck6);
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