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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)
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/parport.h>
#include "pata_parport.h"
#include "ppc6lnx.c"
static int bpck6_read_regr(struct pi_adapter *pi, int cont, int reg)
{
u8 port = cont ? reg | 8 : reg;
ppc6_send_cmd(pi, port | ACCESS_PORT | ACCESS_READ);
return ppc6_rd_data_byte(pi);
}
static void bpck6_write_regr(struct pi_adapter *pi, int cont, int reg, int val)
{
u8 port = cont ? reg | 8 : reg;
ppc6_send_cmd(pi, port | ACCESS_PORT | ACCESS_WRITE);
ppc6_wr_data_byte(pi, val);
}
static void bpck6_wait_for_fifo(struct pi_adapter *pi)
{
int i;
if (pi->private & fifo_wait) {
for (i = 0; i < 20; i++)
parport_read_status(pi->pardev->port);
}
}
static void bpck6_write_block(struct pi_adapter *pi, char *buf, int len)
{
u8 this, last;
ppc6_send_cmd(pi, REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE);
ppc6_wr_data_byte(pi, (u8)len);
ppc6_wr_data_byte(pi, (u8)(len >> 8));
ppc6_wr_data_byte(pi, 0);
ppc6_send_cmd(pi, CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK);
ppc6_send_cmd(pi, ATA_REG_DATA | ACCESS_PORT | ACCESS_WRITE);
switch (mode_map[pi->mode]) {
case PPCMODE_UNI_SW:
case PPCMODE_BI_SW:
while (len--) {
parport_write_data(pi->pardev->port, *buf++);
parport_frob_control(pi->pardev->port, 0,
PARPORT_CONTROL_INIT);
}
break;
case PPCMODE_UNI_FW:
case PPCMODE_BI_FW:
ppc6_send_cmd(pi, CMD_PREFIX_SET | PREFIX_FASTWR);
parport_frob_control(pi->pardev->port, PARPORT_CONTROL_STROBE,
PARPORT_CONTROL_STROBE);
last = *buf;
parport_write_data(pi->pardev->port, last);
while (len) {
this = *buf++;
len--;
if (this == last) {
parport_frob_control(pi->pardev->port, 0,
PARPORT_CONTROL_INIT);
} else {
parport_write_data(pi->pardev->port, this);
last = this;
}
}
parport_frob_control(pi->pardev->port, PARPORT_CONTROL_STROBE,
0);
ppc6_send_cmd(pi, CMD_PREFIX_RESET | PREFIX_FASTWR);
break;
case PPCMODE_EPP_BYTE:
pi->pardev->port->ops->epp_write_data(pi->pardev->port, buf,
len, PARPORT_EPP_FAST_8);
bpck6_wait_for_fifo(pi);
break;
case PPCMODE_EPP_WORD:
pi->pardev->port->ops->epp_write_data(pi->pardev->port, buf,
len, PARPORT_EPP_FAST_16);
bpck6_wait_for_fifo(pi);
break;
case PPCMODE_EPP_DWORD:
pi->pardev->port->ops->epp_write_data(pi->pardev->port, buf,
len, PARPORT_EPP_FAST_32);
bpck6_wait_for_fifo(pi);
break;
}
ppc6_send_cmd(pi, CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK);
}
static void bpck6_read_block(struct pi_adapter *pi, char *buf, int len)
{
ppc6_send_cmd(pi, REG_BLKSIZE | ACCESS_REG | ACCESS_WRITE);
ppc6_wr_data_byte(pi, (u8)len);
ppc6_wr_data_byte(pi, (u8)(len >> 8));
ppc6_wr_data_byte(pi, 0);
ppc6_send_cmd(pi, CMD_PREFIX_SET | PREFIX_IO16 | PREFIX_BLK);
ppc6_send_cmd(pi, ATA_REG_DATA | ACCESS_PORT | ACCESS_READ);
switch (mode_map[pi->mode]) {
case PPCMODE_UNI_SW:
case PPCMODE_UNI_FW:
while (len) {
u8 d;
parport_frob_control(pi->pardev->port,
PARPORT_CONTROL_STROBE,
PARPORT_CONTROL_INIT); /* DATA STROBE */
d = parport_read_status(pi->pardev->port);
d = ((d & 0x80) >> 1) | ((d & 0x38) >> 3);
parport_frob_control(pi->pardev->port,
PARPORT_CONTROL_STROBE,
PARPORT_CONTROL_STROBE);
d |= parport_read_status(pi->pardev->port) & 0xB8;
*buf++ = d;
len--;
}
break;
case PPCMODE_BI_SW:
case PPCMODE_BI_FW:
parport_data_reverse(pi->pardev->port);
while (len) {
parport_frob_control(pi->pardev->port,
PARPORT_CONTROL_STROBE,
PARPORT_CONTROL_STROBE | PARPORT_CONTROL_INIT);
*buf++ = parport_read_data(pi->pardev->port);
len--;
}
parport_frob_control(pi->pardev->port, PARPORT_CONTROL_STROBE,
0);
parport_data_forward(pi->pardev->port);
break;
case PPCMODE_EPP_BYTE:
pi->pardev->port->ops->epp_read_data(pi->pardev->port, buf, len,
PARPORT_EPP_FAST_8);
break;
case PPCMODE_EPP_WORD:
pi->pardev->port->ops->epp_read_data(pi->pardev->port, buf, len,
PARPORT_EPP_FAST_16);
break;
case PPCMODE_EPP_DWORD:
pi->pardev->port->ops->epp_read_data(pi->pardev->port, buf, len,
PARPORT_EPP_FAST_32);
break;
}
ppc6_send_cmd(pi, CMD_PREFIX_RESET | PREFIX_IO16 | PREFIX_BLK);
}
static void bpck6_connect(struct pi_adapter *pi)
{
dev_dbg(&pi->dev, "connect\n");
ppc6_open(pi);
ppc6_wr_extout(pi, 0x3);
}
static void bpck6_disconnect(struct pi_adapter *pi)
{
dev_dbg(&pi->dev, "disconnect\n");
ppc6_wr_extout(pi, 0x0);
ppc6_deselect(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",
pi->pardev->port->modes, pi->pardev->port->base);
/* look at the parport device to see what modes we can use */
if (pi->pardev->port->modes & PARPORT_MODE_EPP)
return 5; /* Can do EPP */
if (pi->pardev->port->modes & PARPORT_MODE_TRISTATE)
return 2;
return 1; /* Just flat SPP */
}
static int bpck6_probe_unit(struct pi_adapter *pi)
{
int out, saved_mode;
dev_dbg(&pi->dev, "PROBE UNIT %x on port:%x\n", pi->unit, pi->port);
saved_mode = pi->mode;
/*LOWER DOWN TO UNIDIRECTIONAL*/
pi->mode = 0;
out = ppc6_open(pi);
dev_dbg(&pi->dev, "ppc_open returned %2x\n", out);
if(out)
{
ppc6_deselect(pi);
dev_dbg(&pi->dev, "leaving probe\n");
pi->mode = saved_mode;
return(1);
}
else
{
dev_dbg(&pi->dev, "Failed open\n");
pi->mode = saved_mode;
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, "Micro Solutions BACKPACK Drive unit %d at 0x%x, mode:%d (%s), delay %d\n",
pi->unit, pi->port, pi->mode, mode_string[pi->mode], pi->delay);
}
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,
};
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Micro Solutions Inc.");
MODULE_DESCRIPTION("BACKPACK Protocol module, compatible with PARIDE");
module_pata_parport_driver(bpck6);
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