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linuxdebug/drivers/parport/parport_pc.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/* Low-level parallel-port routines for 8255-based PC-style hardware.
*
* Authors: Phil Blundell <philb@gnu.org>
* Tim Waugh <tim@cyberelk.demon.co.uk>
* Jose Renau <renau@acm.org>
* David Campbell
* Andrea Arcangeli
*
* based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
*
* Cleaned up include files - Russell King <linux@arm.uk.linux.org>
* DMA support - Bert De Jonghe <bert@sophis.be>
* Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
* More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
* Various hacks, Fred Barnes, 04/2001
* Updated probing logic - Adam Belay <ambx1@neo.rr.com>
*/
/* This driver should work with any hardware that is broadly compatible
* with that in the IBM PC. This applies to the majority of integrated
* I/O chipsets that are commonly available. The expected register
* layout is:
*
* base+0 data
* base+1 status
* base+2 control
*
* In addition, there are some optional registers:
*
* base+3 EPP address
* base+4 EPP data
* base+0x400 ECP config A
* base+0x401 ECP config B
* base+0x402 ECP control
*
* All registers are 8 bits wide and read/write. If your hardware differs
* only in register addresses (eg because your registers are on 32-bit
* word boundaries) then you can alter the constants in parport_pc.h to
* accommodate this.
*
* Note that the ECP registers may not start at offset 0x400 for PCI cards,
* but rather will start at port->base_hi.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched/signal.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/pci.h>
#include <linux/pnp.h>
#include <linux/platform_device.h>
#include <linux/sysctl.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <asm/dma.h>
#include <linux/parport.h>
#include <linux/parport_pc.h>
#include <linux/via.h>
#include <asm/parport.h>
#define PARPORT_PC_MAX_PORTS PARPORT_MAX
#ifdef CONFIG_ISA_DMA_API
#define HAS_DMA
#endif
/* ECR modes */
#define ECR_SPP 00
#define ECR_PS2 01
#define ECR_PPF 02
#define ECR_ECP 03
#define ECR_EPP 04
#define ECR_VND 05
#define ECR_TST 06
#define ECR_CNF 07
#define ECR_MODE_MASK 0xe0
#define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v))
#undef DEBUG
#define NR_SUPERIOS 3
static struct superio_struct { /* For Super-IO chips autodetection */
int io;
int irq;
int dma;
} superios[NR_SUPERIOS] = { {0,},};
static int user_specified;
#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
(defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
static int verbose_probing;
#endif
static int pci_registered_parport;
static int pnp_registered_parport;
/* frob_control, but for ECR */
static void frob_econtrol(struct parport *pb, unsigned char m,
unsigned char v)
{
unsigned char ectr = 0;
if (m != 0xff)
ectr = inb(ECONTROL(pb));
pr_debug("frob_econtrol(%02x,%02x): %02x -> %02x\n",
m, v, ectr, (ectr & ~m) ^ v);
outb((ectr & ~m) ^ v, ECONTROL(pb));
}
static inline void frob_set_mode(struct parport *p, int mode)
{
frob_econtrol(p, ECR_MODE_MASK, mode << 5);
}
#ifdef CONFIG_PARPORT_PC_FIFO
/* Safely change the mode bits in the ECR
Returns:
0 : Success
-EBUSY: Could not drain FIFO in some finite amount of time,
mode not changed!
*/
static int change_mode(struct parport *p, int m)
{
const struct parport_pc_private *priv = p->physport->private_data;
unsigned char oecr;
int mode;
pr_debug("parport change_mode ECP-ISA to mode 0x%02x\n", m);
if (!priv->ecr) {
printk(KERN_DEBUG "change_mode: but there's no ECR!\n");
return 0;
}
/* Bits <7:5> contain the mode. */
oecr = inb(ECONTROL(p));
mode = (oecr >> 5) & 0x7;
if (mode == m)
return 0;
if (mode >= 2 && !(priv->ctr & 0x20)) {
/* This mode resets the FIFO, so we may
* have to wait for it to drain first. */
unsigned long expire = jiffies + p->physport->cad->timeout;
int counter;
switch (mode) {
case ECR_PPF: /* Parallel Port FIFO mode */
case ECR_ECP: /* ECP Parallel Port mode */
/* Busy wait for 200us */
for (counter = 0; counter < 40; counter++) {
if (inb(ECONTROL(p)) & 0x01)
break;
if (signal_pending(current))
break;
udelay(5);
}
/* Poll slowly. */
while (!(inb(ECONTROL(p)) & 0x01)) {
if (time_after_eq(jiffies, expire))
/* The FIFO is stuck. */
return -EBUSY;
schedule_timeout_interruptible(
msecs_to_jiffies(10));
if (signal_pending(current))
break;
}
}
}
if (mode >= 2 && m >= 2) {
/* We have to go through mode 001 */
oecr &= ~(7 << 5);
oecr |= ECR_PS2 << 5;
ECR_WRITE(p, oecr);
}
/* Set the mode. */
oecr &= ~(7 << 5);
oecr |= m << 5;
ECR_WRITE(p, oecr);
return 0;
}
#endif /* FIFO support */
/*
* Clear TIMEOUT BIT in EPP MODE
*
* This is also used in SPP detection.
*/
static int clear_epp_timeout(struct parport *pb)
{
unsigned char r;
if (!(parport_pc_read_status(pb) & 0x01))
return 1;
/* To clear timeout some chips require double read */
parport_pc_read_status(pb);
r = parport_pc_read_status(pb);
outb(r | 0x01, STATUS(pb)); /* Some reset by writing 1 */
outb(r & 0xfe, STATUS(pb)); /* Others by writing 0 */
r = parport_pc_read_status(pb);
return !(r & 0x01);
}
/*
* Access functions.
*
* Most of these aren't static because they may be used by the
* parport_xxx_yyy macros. extern __inline__ versions of several
* of these are in parport_pc.h.
*/
static void parport_pc_init_state(struct pardevice *dev,
struct parport_state *s)
{
s->u.pc.ctr = 0xc;
if (dev->irq_func &&
dev->port->irq != PARPORT_IRQ_NONE)
/* Set ackIntEn */
s->u.pc.ctr |= 0x10;
s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
* D.Gruszka VScom */
}
static void parport_pc_save_state(struct parport *p, struct parport_state *s)
{
const struct parport_pc_private *priv = p->physport->private_data;
s->u.pc.ctr = priv->ctr;
if (priv->ecr)
s->u.pc.ecr = inb(ECONTROL(p));
}
static void parport_pc_restore_state(struct parport *p,
struct parport_state *s)
{
struct parport_pc_private *priv = p->physport->private_data;
register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
outb(c, CONTROL(p));
priv->ctr = c;
if (priv->ecr)
ECR_WRITE(p, s->u.pc.ecr);
}
#ifdef CONFIG_PARPORT_1284
static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
size_t length, int flags)
{
size_t got = 0;
if (flags & PARPORT_W91284PIC) {
unsigned char status;
size_t left = length;
/* use knowledge about data lines..:
* nFault is 0 if there is at least 1 byte in the Warp's FIFO
* pError is 1 if there are 16 bytes in the Warp's FIFO
*/
status = inb(STATUS(port));
while (!(status & 0x08) && got < length) {
if (left >= 16 && (status & 0x20) && !(status & 0x08)) {
/* can grab 16 bytes from warp fifo */
if (!((long)buf & 0x03))
insl(EPPDATA(port), buf, 4);
else
insb(EPPDATA(port), buf, 16);
buf += 16;
got += 16;
left -= 16;
} else {
/* grab single byte from the warp fifo */
*((char *)buf) = inb(EPPDATA(port));
buf++;
got++;
left--;
}
status = inb(STATUS(port));
if (status & 0x01) {
/* EPP timeout should never occur... */
printk(KERN_DEBUG "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n",
port->name);
clear_epp_timeout(port);
}
}
return got;
}
if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
if (!(((long)buf | length) & 0x03))
insl(EPPDATA(port), buf, (length >> 2));
else
insb(EPPDATA(port), buf, length);
if (inb(STATUS(port)) & 0x01) {
clear_epp_timeout(port);
return -EIO;
}
return length;
}
for (; got < length; got++) {
*((char *)buf) = inb(EPPDATA(port));
buf++;
if (inb(STATUS(port)) & 0x01) {
/* EPP timeout */
clear_epp_timeout(port);
break;
}
}
return got;
}
static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
size_t length, int flags)
{
size_t written = 0;
if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
if (!(((long)buf | length) & 0x03))
outsl(EPPDATA(port), buf, (length >> 2));
else
outsb(EPPDATA(port), buf, length);
if (inb(STATUS(port)) & 0x01) {
clear_epp_timeout(port);
return -EIO;
}
return length;
}
for (; written < length; written++) {
outb(*((char *)buf), EPPDATA(port));
buf++;
if (inb(STATUS(port)) & 0x01) {
clear_epp_timeout(port);
break;
}
}
return written;
}
static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
size_t length, int flags)
{
size_t got = 0;
if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
insb(EPPADDR(port), buf, length);
if (inb(STATUS(port)) & 0x01) {
clear_epp_timeout(port);
return -EIO;
}
return length;
}
for (; got < length; got++) {
*((char *)buf) = inb(EPPADDR(port));
buf++;
if (inb(STATUS(port)) & 0x01) {
clear_epp_timeout(port);
break;
}
}
return got;
}
static size_t parport_pc_epp_write_addr(struct parport *port,
const void *buf, size_t length,
int flags)
{
size_t written = 0;
if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
outsb(EPPADDR(port), buf, length);
if (inb(STATUS(port)) & 0x01) {
clear_epp_timeout(port);
return -EIO;
}
return length;
}
for (; written < length; written++) {
outb(*((char *)buf), EPPADDR(port));
buf++;
if (inb(STATUS(port)) & 0x01) {
clear_epp_timeout(port);
break;
}
}
return written;
}
static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
size_t length, int flags)
{
size_t got;
frob_set_mode(port, ECR_EPP);
parport_pc_data_reverse(port);
parport_pc_write_control(port, 0x4);
got = parport_pc_epp_read_data(port, buf, length, flags);
frob_set_mode(port, ECR_PS2);
return got;
}
static size_t parport_pc_ecpepp_write_data(struct parport *port,
const void *buf, size_t length,
int flags)
{
size_t written;
frob_set_mode(port, ECR_EPP);
parport_pc_write_control(port, 0x4);
parport_pc_data_forward(port);
written = parport_pc_epp_write_data(port, buf, length, flags);
frob_set_mode(port, ECR_PS2);
return written;
}
static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
size_t length, int flags)
{
size_t got;
frob_set_mode(port, ECR_EPP);
parport_pc_data_reverse(port);
parport_pc_write_control(port, 0x4);
got = parport_pc_epp_read_addr(port, buf, length, flags);
frob_set_mode(port, ECR_PS2);
return got;
}
static size_t parport_pc_ecpepp_write_addr(struct parport *port,
const void *buf, size_t length,
int flags)
{
size_t written;
frob_set_mode(port, ECR_EPP);
parport_pc_write_control(port, 0x4);
parport_pc_data_forward(port);
written = parport_pc_epp_write_addr(port, buf, length, flags);
frob_set_mode(port, ECR_PS2);
return written;
}
#endif /* IEEE 1284 support */
#ifdef CONFIG_PARPORT_PC_FIFO
static size_t parport_pc_fifo_write_block_pio(struct parport *port,
const void *buf, size_t length)
{
int ret = 0;
const unsigned char *bufp = buf;
size_t left = length;
unsigned long expire = jiffies + port->physport->cad->timeout;
const unsigned long fifo = FIFO(port);
int poll_for = 8; /* 80 usecs */
const struct parport_pc_private *priv = port->physport->private_data;
const int fifo_depth = priv->fifo_depth;
port = port->physport;
/* We don't want to be interrupted every character. */
parport_pc_disable_irq(port);
/* set nErrIntrEn and serviceIntr */
frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
/* Forward mode. */
parport_pc_data_forward(port); /* Must be in PS2 mode */
while (left) {
unsigned char byte;
unsigned char ecrval = inb(ECONTROL(port));
int i = 0;
if (need_resched() && time_before(jiffies, expire))
/* Can't yield the port. */
schedule();
/* Anyone else waiting for the port? */
if (port->waithead) {
printk(KERN_DEBUG "Somebody wants the port\n");
break;
}
if (ecrval & 0x02) {
/* FIFO is full. Wait for interrupt. */
/* Clear serviceIntr */
ECR_WRITE(port, ecrval & ~(1<<2));
false_alarm:
ret = parport_wait_event(port, HZ);
if (ret < 0)
break;
ret = 0;
if (!time_before(jiffies, expire)) {
/* Timed out. */
printk(KERN_DEBUG "FIFO write timed out\n");
break;
}
ecrval = inb(ECONTROL(port));
if (!(ecrval & (1<<2))) {
if (need_resched() &&
time_before(jiffies, expire))
schedule();
goto false_alarm;
}
continue;
}
/* Can't fail now. */
expire = jiffies + port->cad->timeout;
poll:
if (signal_pending(current))
break;
if (ecrval & 0x01) {
/* FIFO is empty. Blast it full. */
const int n = left < fifo_depth ? left : fifo_depth;
outsb(fifo, bufp, n);
bufp += n;
left -= n;
/* Adjust the poll time. */
if (i < (poll_for - 2))
poll_for--;
continue;
} else if (i++ < poll_for) {
udelay(10);
ecrval = inb(ECONTROL(port));
goto poll;
}
/* Half-full(call me an optimist) */
byte = *bufp++;
outb(byte, fifo);
left--;
}
dump_parport_state("leave fifo_write_block_pio", port);
return length - left;
}
#ifdef HAS_DMA
static size_t parport_pc_fifo_write_block_dma(struct parport *port,
const void *buf, size_t length)
{
int ret = 0;
unsigned long dmaflag;
size_t left = length;
const struct parport_pc_private *priv = port->physport->private_data;
struct device *dev = port->physport->dev;
dma_addr_t dma_addr, dma_handle;
size_t maxlen = 0x10000; /* max 64k per DMA transfer */
unsigned long start = (unsigned long) buf;
unsigned long end = (unsigned long) buf + length - 1;
dump_parport_state("enter fifo_write_block_dma", port);
if (end < MAX_DMA_ADDRESS) {
/* If it would cross a 64k boundary, cap it at the end. */
if ((start ^ end) & ~0xffffUL)
maxlen = 0x10000 - (start & 0xffff);
dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
DMA_TO_DEVICE);
} else {
/* above 16 MB we use a bounce buffer as ISA-DMA
is not possible */
maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
dma_addr = priv->dma_handle;
dma_handle = 0;
}
port = port->physport;
/* We don't want to be interrupted every character. */
parport_pc_disable_irq(port);
/* set nErrIntrEn and serviceIntr */
frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
/* Forward mode. */
parport_pc_data_forward(port); /* Must be in PS2 mode */
while (left) {
unsigned long expire = jiffies + port->physport->cad->timeout;
size_t count = left;
if (count > maxlen)
count = maxlen;
if (!dma_handle) /* bounce buffer ! */
memcpy(priv->dma_buf, buf, count);
dmaflag = claim_dma_lock();
disable_dma(port->dma);
clear_dma_ff(port->dma);
set_dma_mode(port->dma, DMA_MODE_WRITE);
set_dma_addr(port->dma, dma_addr);
set_dma_count(port->dma, count);
/* Set DMA mode */
frob_econtrol(port, 1<<3, 1<<3);
/* Clear serviceIntr */
frob_econtrol(port, 1<<2, 0);
enable_dma(port->dma);
release_dma_lock(dmaflag);
/* assume DMA will be successful */
left -= count;
buf += count;
if (dma_handle)
dma_addr += count;
/* Wait for interrupt. */
false_alarm:
ret = parport_wait_event(port, HZ);
if (ret < 0)
break;
ret = 0;
if (!time_before(jiffies, expire)) {
/* Timed out. */
printk(KERN_DEBUG "DMA write timed out\n");
break;
}
/* Is serviceIntr set? */
if (!(inb(ECONTROL(port)) & (1<<2))) {
cond_resched();
goto false_alarm;
}
dmaflag = claim_dma_lock();
disable_dma(port->dma);
clear_dma_ff(port->dma);
count = get_dma_residue(port->dma);
release_dma_lock(dmaflag);
cond_resched(); /* Can't yield the port. */
/* Anyone else waiting for the port? */
if (port->waithead) {
printk(KERN_DEBUG "Somebody wants the port\n");
break;
}
/* update for possible DMA residue ! */
buf -= count;
left += count;
if (dma_handle)
dma_addr -= count;
}
/* Maybe got here through break, so adjust for DMA residue! */
dmaflag = claim_dma_lock();
disable_dma(port->dma);
clear_dma_ff(port->dma);
left += get_dma_residue(port->dma);
release_dma_lock(dmaflag);
/* Turn off DMA mode */
frob_econtrol(port, 1<<3, 0);
if (dma_handle)
dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
dump_parport_state("leave fifo_write_block_dma", port);
return length - left;
}
#endif
static inline size_t parport_pc_fifo_write_block(struct parport *port,
const void *buf, size_t length)
{
#ifdef HAS_DMA
if (port->dma != PARPORT_DMA_NONE)
return parport_pc_fifo_write_block_dma(port, buf, length);
#endif
return parport_pc_fifo_write_block_pio(port, buf, length);
}
/* Parallel Port FIFO mode (ECP chipsets) */
static size_t parport_pc_compat_write_block_pio(struct parport *port,
const void *buf, size_t length,
int flags)
{
size_t written;
int r;
unsigned long expire;
const struct parport_pc_private *priv = port->physport->private_data;
/* Special case: a timeout of zero means we cannot call schedule().
* Also if O_NONBLOCK is set then use the default implementation. */
if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
return parport_ieee1284_write_compat(port, buf,
length, flags);
/* Set up parallel port FIFO mode.*/
parport_pc_data_forward(port); /* Must be in PS2 mode */
parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0);
r = change_mode(port, ECR_PPF); /* Parallel port FIFO */
if (r)
printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
port->name);
port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
/* Write the data to the FIFO. */
written = parport_pc_fifo_write_block(port, buf, length);
/* Finish up. */
/* For some hardware we don't want to touch the mode until
* the FIFO is empty, so allow 4 seconds for each position
* in the fifo.
*/
expire = jiffies + (priv->fifo_depth * HZ * 4);
do {
/* Wait for the FIFO to empty */
r = change_mode(port, ECR_PS2);
if (r != -EBUSY)
break;
} while (time_before(jiffies, expire));
if (r == -EBUSY) {
printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
/* Prevent further data transfer. */
frob_set_mode(port, ECR_TST);
/* Adjust for the contents of the FIFO. */
for (written -= priv->fifo_depth; ; written++) {
if (inb(ECONTROL(port)) & 0x2) {
/* Full up. */
break;
}
outb(0, FIFO(port));
}
/* Reset the FIFO and return to PS2 mode. */
frob_set_mode(port, ECR_PS2);
}
r = parport_wait_peripheral(port,
PARPORT_STATUS_BUSY,
PARPORT_STATUS_BUSY);
if (r)
printk(KERN_DEBUG "%s: BUSY timeout (%d) in compat_write_block_pio\n",
port->name, r);
port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
return written;
}
/* ECP */
#ifdef CONFIG_PARPORT_1284
static size_t parport_pc_ecp_write_block_pio(struct parport *port,
const void *buf, size_t length,
int flags)
{
size_t written;
int r;
unsigned long expire;
const struct parport_pc_private *priv = port->physport->private_data;
/* Special case: a timeout of zero means we cannot call schedule().
* Also if O_NONBLOCK is set then use the default implementation. */
if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
return parport_ieee1284_ecp_write_data(port, buf,
length, flags);
/* Switch to forward mode if necessary. */
if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
/* Event 47: Set nInit high. */
parport_frob_control(port,
PARPORT_CONTROL_INIT
| PARPORT_CONTROL_AUTOFD,
PARPORT_CONTROL_INIT
| PARPORT_CONTROL_AUTOFD);
/* Event 49: PError goes high. */
r = parport_wait_peripheral(port,
PARPORT_STATUS_PAPEROUT,
PARPORT_STATUS_PAPEROUT);
if (r) {
printk(KERN_DEBUG "%s: PError timeout (%d) in ecp_write_block_pio\n",
port->name, r);
}
}
/* Set up ECP parallel port mode.*/
parport_pc_data_forward(port); /* Must be in PS2 mode */
parport_pc_frob_control(port,
PARPORT_CONTROL_STROBE |
PARPORT_CONTROL_AUTOFD,
0);
r = change_mode(port, ECR_ECP); /* ECP FIFO */
if (r)
printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
port->name);
port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
/* Write the data to the FIFO. */
written = parport_pc_fifo_write_block(port, buf, length);
/* Finish up. */
/* For some hardware we don't want to touch the mode until
* the FIFO is empty, so allow 4 seconds for each position
* in the fifo.
*/
expire = jiffies + (priv->fifo_depth * (HZ * 4));
do {
/* Wait for the FIFO to empty */
r = change_mode(port, ECR_PS2);
if (r != -EBUSY)
break;
} while (time_before(jiffies, expire));
if (r == -EBUSY) {
printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
/* Prevent further data transfer. */
frob_set_mode(port, ECR_TST);
/* Adjust for the contents of the FIFO. */
for (written -= priv->fifo_depth; ; written++) {
if (inb(ECONTROL(port)) & 0x2) {
/* Full up. */
break;
}
outb(0, FIFO(port));
}
/* Reset the FIFO and return to PS2 mode. */
frob_set_mode(port, ECR_PS2);
/* Host transfer recovery. */
parport_pc_data_reverse(port); /* Must be in PS2 mode */
udelay(5);
parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
if (r)
printk(KERN_DEBUG "%s: PE,1 timeout (%d) in ecp_write_block_pio\n",
port->name, r);
parport_frob_control(port,
PARPORT_CONTROL_INIT,
PARPORT_CONTROL_INIT);
r = parport_wait_peripheral(port,
PARPORT_STATUS_PAPEROUT,
PARPORT_STATUS_PAPEROUT);
if (r)
printk(KERN_DEBUG "%s: PE,2 timeout (%d) in ecp_write_block_pio\n",
port->name, r);
}
r = parport_wait_peripheral(port,
PARPORT_STATUS_BUSY,
PARPORT_STATUS_BUSY);
if (r)
printk(KERN_DEBUG "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
port->name, r);
port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
return written;
}
#endif /* IEEE 1284 support */
#endif /* Allowed to use FIFO/DMA */
/*
* ******************************************
* INITIALISATION AND MODULE STUFF BELOW HERE
* ******************************************
*/
/* GCC is not inlining extern inline function later overwritten to non-inline,
so we use outlined_ variants here. */
static const struct parport_operations parport_pc_ops = {
.write_data = parport_pc_write_data,
.read_data = parport_pc_read_data,
.write_control = parport_pc_write_control,
.read_control = parport_pc_read_control,
.frob_control = parport_pc_frob_control,
.read_status = parport_pc_read_status,
.enable_irq = parport_pc_enable_irq,
.disable_irq = parport_pc_disable_irq,
.data_forward = parport_pc_data_forward,
.data_reverse = parport_pc_data_reverse,
.init_state = parport_pc_init_state,
.save_state = parport_pc_save_state,
.restore_state = parport_pc_restore_state,
.epp_write_data = parport_ieee1284_epp_write_data,
.epp_read_data = parport_ieee1284_epp_read_data,
.epp_write_addr = parport_ieee1284_epp_write_addr,
.epp_read_addr = parport_ieee1284_epp_read_addr,
.ecp_write_data = parport_ieee1284_ecp_write_data,
.ecp_read_data = parport_ieee1284_ecp_read_data,
.ecp_write_addr = parport_ieee1284_ecp_write_addr,
.compat_write_data = parport_ieee1284_write_compat,
.nibble_read_data = parport_ieee1284_read_nibble,
.byte_read_data = parport_ieee1284_read_byte,
.owner = THIS_MODULE,
};
#ifdef CONFIG_PARPORT_PC_SUPERIO
static struct superio_struct *find_free_superio(void)
{
int i;
for (i = 0; i < NR_SUPERIOS; i++)
if (superios[i].io == 0)
return &superios[i];
return NULL;
}
/* Super-IO chipset detection, Winbond, SMSC */
static void show_parconfig_smsc37c669(int io, int key)
{
int cr1, cr4, cra, cr23, cr26, cr27;
struct superio_struct *s;
static const char *const modes[] = {
"SPP and Bidirectional (PS/2)",
"EPP and SPP",
"ECP",
"ECP and EPP" };
outb(key, io);
outb(key, io);
outb(1, io);
cr1 = inb(io + 1);
outb(4, io);
cr4 = inb(io + 1);
outb(0x0a, io);
cra = inb(io + 1);
outb(0x23, io);
cr23 = inb(io + 1);
outb(0x26, io);
cr26 = inb(io + 1);
outb(0x27, io);
cr27 = inb(io + 1);
outb(0xaa, io);
if (verbose_probing) {
pr_info("SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
cr1, cr4, cra, cr23, cr26, cr27);
/* The documentation calls DMA and IRQ-Lines by letters, so
the board maker can/will wire them
appropriately/randomly... G=reserved H=IDE-irq, */
pr_info("SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n",
cr23 * 4,
(cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
(cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-',
cra & 0x0f);
pr_info("SMSC LPT Config: enabled=%s power=%s\n",
(cr23 * 4 >= 0x100) ? "yes" : "no",
(cr1 & 4) ? "yes" : "no");
pr_info("SMSC LPT Config: Port mode=%s, EPP version =%s\n",
(cr1 & 0x08) ? "Standard mode only (SPP)"
: modes[cr4 & 0x03],
(cr4 & 0x40) ? "1.7" : "1.9");
}
/* Heuristics ! BIOS setup for this mainboard device limits
the choices to standard settings, i.e. io-address and IRQ
are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
if (cr23 * 4 >= 0x100) { /* if active */
s = find_free_superio();
if (s == NULL)
pr_info("Super-IO: too many chips!\n");
else {
int d;
switch (cr23 * 4) {
case 0x3bc:
s->io = 0x3bc;
s->irq = 7;
break;
case 0x378:
s->io = 0x378;
s->irq = 7;
break;
case 0x278:
s->io = 0x278;
s->irq = 5;
}
d = (cr26 & 0x0f);
if (d == 1 || d == 3)
s->dma = d;
else
s->dma = PARPORT_DMA_NONE;
}
}
}
static void show_parconfig_winbond(int io, int key)
{
int cr30, cr60, cr61, cr70, cr74, crf0;
struct superio_struct *s;
static const char *const modes[] = {
"Standard (SPP) and Bidirectional(PS/2)", /* 0 */
"EPP-1.9 and SPP",
"ECP",
"ECP and EPP-1.9",
"Standard (SPP)",
"EPP-1.7 and SPP", /* 5 */
"undefined!",
"ECP and EPP-1.7" };
static char *const irqtypes[] = {
"pulsed low, high-Z",
"follows nACK" };
/* The registers are called compatible-PnP because the
register layout is modelled after ISA-PnP, the access
method is just another ... */
outb(key, io);
outb(key, io);
outb(0x07, io); /* Register 7: Select Logical Device */
outb(0x01, io + 1); /* LD1 is Parallel Port */
outb(0x30, io);
cr30 = inb(io + 1);
outb(0x60, io);
cr60 = inb(io + 1);
outb(0x61, io);
cr61 = inb(io + 1);
outb(0x70, io);
cr70 = inb(io + 1);
outb(0x74, io);
cr74 = inb(io + 1);
outb(0xf0, io);
crf0 = inb(io + 1);
outb(0xaa, io);
if (verbose_probing) {
pr_info("Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n",
cr30, cr60, cr61, cr70, cr74, crf0);
pr_info("Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
(cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f);
if ((cr74 & 0x07) > 3)
pr_cont("dma=none\n");
else
pr_cont("dma=%d\n", cr74 & 0x07);
pr_info("Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
irqtypes[crf0 >> 7], (crf0 >> 3) & 0x0f);
pr_info("Winbond LPT Config: Port mode=%s\n",
modes[crf0 & 0x07]);
}
if (cr30 & 0x01) { /* the settings can be interrogated later ... */
s = find_free_superio();
if (s == NULL)
pr_info("Super-IO: too many chips!\n");
else {
s->io = (cr60 << 8) | cr61;
s->irq = cr70 & 0x0f;
s->dma = (((cr74 & 0x07) > 3) ?
PARPORT_DMA_NONE : (cr74 & 0x07));
}
}
}
static void decode_winbond(int efer, int key, int devid, int devrev, int oldid)
{
const char *type = "unknown";
int id, progif = 2;
if (devid == devrev)
/* simple heuristics, we happened to read some
non-winbond register */
return;
id = (devid << 8) | devrev;
/* Values are from public data sheets pdf files, I can just
confirm 83977TF is correct :-) */
if (id == 0x9771)
type = "83977F/AF";
else if (id == 0x9773)
type = "83977TF / SMSC 97w33x/97w34x";
else if (id == 0x9774)
type = "83977ATF";
else if ((id & ~0x0f) == 0x5270)
type = "83977CTF / SMSC 97w36x";
else if ((id & ~0x0f) == 0x52f0)
type = "83977EF / SMSC 97w35x";
else if ((id & ~0x0f) == 0x5210)
type = "83627";
else if ((id & ~0x0f) == 0x6010)
type = "83697HF";
else if ((oldid & 0x0f) == 0x0a) {
type = "83877F";
progif = 1;
} else if ((oldid & 0x0f) == 0x0b) {
type = "83877AF";
progif = 1;
} else if ((oldid & 0x0f) == 0x0c) {
type = "83877TF";
progif = 1;
} else if ((oldid & 0x0f) == 0x0d) {
type = "83877ATF";
progif = 1;
} else
progif = 0;
if (verbose_probing)
pr_info("Winbond chip at EFER=0x%x key=0x%02x devid=%02x devrev=%02x oldid=%02x type=%s\n",
efer, key, devid, devrev, oldid, type);
if (progif == 2)
show_parconfig_winbond(efer, key);
}
static void decode_smsc(int efer, int key, int devid, int devrev)
{
const char *type = "unknown";
void (*func)(int io, int key);
int id;
if (devid == devrev)
/* simple heuristics, we happened to read some
non-smsc register */
return;
func = NULL;
id = (devid << 8) | devrev;
if (id == 0x0302) {
type = "37c669";
func = show_parconfig_smsc37c669;
} else if (id == 0x6582)
type = "37c665IR";
else if (devid == 0x65)
type = "37c665GT";
else if (devid == 0x66)
type = "37c666GT";
if (verbose_probing)
pr_info("SMSC chip at EFER=0x%x key=0x%02x devid=%02x devrev=%02x type=%s\n",
efer, key, devid, devrev, type);
if (func)
func(efer, key);
}
static void winbond_check(int io, int key)
{
int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
if (!request_region(io, 3, __func__))
return;
origval = inb(io); /* Save original value */
/* First probe without key */
outb(0x20, io);
x_devid = inb(io + 1);
outb(0x21, io);
x_devrev = inb(io + 1);
outb(0x09, io);
x_oldid = inb(io + 1);
outb(key, io);
outb(key, io); /* Write Magic Sequence to EFER, extended
function enable register */
outb(0x20, io); /* Write EFIR, extended function index register */
devid = inb(io + 1); /* Read EFDR, extended function data register */
outb(0x21, io);
devrev = inb(io + 1);
outb(0x09, io);
oldid = inb(io + 1);
outb(0xaa, io); /* Magic Seal */
outb(origval, io); /* in case we poked some entirely different hardware */
if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
goto out; /* protection against false positives */
decode_winbond(io, key, devid, devrev, oldid);
out:
release_region(io, 3);
}
static void winbond_check2(int io, int key)
{
int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
if (!request_region(io, 3, __func__))
return;
origval[0] = inb(io); /* Save original values */
origval[1] = inb(io + 1);
origval[2] = inb(io + 2);
/* First probe without the key */
outb(0x20, io + 2);
x_devid = inb(io + 2);
outb(0x21, io + 1);
x_devrev = inb(io + 2);
outb(0x09, io + 1);
x_oldid = inb(io + 2);
outb(key, io); /* Write Magic Byte to EFER, extended
function enable register */
outb(0x20, io + 2); /* Write EFIR, extended function index register */
devid = inb(io + 2); /* Read EFDR, extended function data register */
outb(0x21, io + 1);
devrev = inb(io + 2);
outb(0x09, io + 1);
oldid = inb(io + 2);
outb(0xaa, io); /* Magic Seal */
outb(origval[0], io); /* in case we poked some entirely different hardware */
outb(origval[1], io + 1);
outb(origval[2], io + 2);
if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
goto out; /* protection against false positives */
decode_winbond(io, key, devid, devrev, oldid);
out:
release_region(io, 3);
}
static void smsc_check(int io, int key)
{
int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
if (!request_region(io, 3, __func__))
return;
origval = inb(io); /* Save original value */
/* First probe without the key */
outb(0x0d, io);
x_oldid = inb(io + 1);
outb(0x0e, io);
x_oldrev = inb(io + 1);
outb(0x20, io);
x_id = inb(io + 1);
outb(0x21, io);
x_rev = inb(io + 1);
outb(key, io);
outb(key, io); /* Write Magic Sequence to EFER, extended
function enable register */
outb(0x0d, io); /* Write EFIR, extended function index register */
oldid = inb(io + 1); /* Read EFDR, extended function data register */
outb(0x0e, io);
oldrev = inb(io + 1);
outb(0x20, io);
id = inb(io + 1);
outb(0x21, io);
rev = inb(io + 1);
outb(0xaa, io); /* Magic Seal */
outb(origval, io); /* in case we poked some entirely different hardware */
if (x_id == id && x_oldrev == oldrev &&
x_oldid == oldid && x_rev == rev)
goto out; /* protection against false positives */
decode_smsc(io, key, oldid, oldrev);
out:
release_region(io, 3);
}
static void detect_and_report_winbond(void)
{
if (verbose_probing)
printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
winbond_check(0x3f0, 0x87);
winbond_check(0x370, 0x87);
winbond_check(0x2e , 0x87);
winbond_check(0x4e , 0x87);
winbond_check(0x3f0, 0x86);
winbond_check2(0x250, 0x88);
winbond_check2(0x250, 0x89);
}
static void detect_and_report_smsc(void)
{
if (verbose_probing)
printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
smsc_check(0x3f0, 0x55);
smsc_check(0x370, 0x55);
smsc_check(0x3f0, 0x44);
smsc_check(0x370, 0x44);
}
static void detect_and_report_it87(void)
{
u16 dev;
u8 origval, r;
if (verbose_probing)
printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
if (!request_muxed_region(0x2e, 2, __func__))
return;
origval = inb(0x2e); /* Save original value */
outb(0x87, 0x2e);
outb(0x01, 0x2e);
outb(0x55, 0x2e);
outb(0x55, 0x2e);
outb(0x20, 0x2e);
dev = inb(0x2f) << 8;
outb(0x21, 0x2e);
dev |= inb(0x2f);
if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 ||
dev == 0x8716 || dev == 0x8718 || dev == 0x8726) {
pr_info("IT%04X SuperIO detected\n", dev);
outb(0x07, 0x2E); /* Parallel Port */
outb(0x03, 0x2F);
outb(0xF0, 0x2E); /* BOOT 0x80 off */
r = inb(0x2f);
outb(0xF0, 0x2E);
outb(r | 8, 0x2F);
outb(0x02, 0x2E); /* Lock */
outb(0x02, 0x2F);
} else {
outb(origval, 0x2e); /* Oops, sorry to disturb */
}
release_region(0x2e, 2);
}
#endif /* CONFIG_PARPORT_PC_SUPERIO */
static struct superio_struct *find_superio(struct parport *p)
{
int i;
for (i = 0; i < NR_SUPERIOS; i++)
if (superios[i].io == p->base)
return &superios[i];
return NULL;
}
static int get_superio_dma(struct parport *p)
{
struct superio_struct *s = find_superio(p);
if (s)
return s->dma;
return PARPORT_DMA_NONE;
}
static int get_superio_irq(struct parport *p)
{
struct superio_struct *s = find_superio(p);
if (s)
return s->irq;
return PARPORT_IRQ_NONE;
}
/* --- Mode detection ------------------------------------- */
/*
* Checks for port existence, all ports support SPP MODE
* Returns:
* 0 : No parallel port at this address
* PARPORT_MODE_PCSPP : SPP port detected
* (if the user specified an ioport himself,
* this shall always be the case!)
*
*/
static int parport_SPP_supported(struct parport *pb)
{
unsigned char r, w;
/*
* first clear an eventually pending EPP timeout
* I (sailer@ife.ee.ethz.ch) have an SMSC chipset
* that does not even respond to SPP cycles if an EPP
* timeout is pending
*/
clear_epp_timeout(pb);
/* Do a simple read-write test to make sure the port exists. */
w = 0xc;
outb(w, CONTROL(pb));
/* Is there a control register that we can read from? Some
* ports don't allow reads, so read_control just returns a
* software copy. Some ports _do_ allow reads, so bypass the
* software copy here. In addition, some bits aren't
* writable. */
r = inb(CONTROL(pb));
if ((r & 0xf) == w) {
w = 0xe;
outb(w, CONTROL(pb));
r = inb(CONTROL(pb));
outb(0xc, CONTROL(pb));
if ((r & 0xf) == w)
return PARPORT_MODE_PCSPP;
}
if (user_specified)
/* That didn't work, but the user thinks there's a
* port here. */
pr_info("parport 0x%lx (WARNING): CTR: wrote 0x%02x, read 0x%02x\n",
pb->base, w, r);
/* Try the data register. The data lines aren't tri-stated at
* this stage, so we expect back what we wrote. */
w = 0xaa;
parport_pc_write_data(pb, w);
r = parport_pc_read_data(pb);
if (r == w) {
w = 0x55;
parport_pc_write_data(pb, w);
r = parport_pc_read_data(pb);
if (r == w)
return PARPORT_MODE_PCSPP;
}
if (user_specified) {
/* Didn't work, but the user is convinced this is the
* place. */
pr_info("parport 0x%lx (WARNING): DATA: wrote 0x%02x, read 0x%02x\n",
pb->base, w, r);
pr_info("parport 0x%lx: You gave this address, but there is probably no parallel port there!\n",
pb->base);
}
/* It's possible that we can't read the control register or
* the data register. In that case just believe the user. */
if (user_specified)
return PARPORT_MODE_PCSPP;
return 0;
}
/* Check for ECR
*
* Old style XT ports alias io ports every 0x400, hence accessing ECR
* on these cards actually accesses the CTR.
*
* Modern cards don't do this but reading from ECR will return 0xff
* regardless of what is written here if the card does NOT support
* ECP.
*
* We first check to see if ECR is the same as CTR. If not, the low
* two bits of ECR aren't writable, so we check by writing ECR and
* reading it back to see if it's what we expect.
*/
static int parport_ECR_present(struct parport *pb)
{
struct parport_pc_private *priv = pb->private_data;
unsigned char r = 0xc;
outb(r, CONTROL(pb));
if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) {
outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */
r = inb(CONTROL(pb));
if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
goto no_reg; /* Sure that no ECR register exists */
}
if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
goto no_reg;
ECR_WRITE(pb, 0x34);
if (inb(ECONTROL(pb)) != 0x35)
goto no_reg;
priv->ecr = 1;
outb(0xc, CONTROL(pb));
/* Go to mode 000 */
frob_set_mode(pb, ECR_SPP);
return 1;
no_reg:
outb(0xc, CONTROL(pb));
return 0;
}
#ifdef CONFIG_PARPORT_1284
/* Detect PS/2 support.
*
* Bit 5 (0x20) sets the PS/2 data direction; setting this high
* allows us to read data from the data lines. In theory we would get back
* 0xff but any peripheral attached to the port may drag some or all of the
* lines down to zero. So if we get back anything that isn't the contents
* of the data register we deem PS/2 support to be present.
*
* Some SPP ports have "half PS/2" ability - you can't turn off the line
* drivers, but an external peripheral with sufficiently beefy drivers of
* its own can overpower them and assert its own levels onto the bus, from
* where they can then be read back as normal. Ports with this property
* and the right type of device attached are likely to fail the SPP test,
* (as they will appear to have stuck bits) and so the fact that they might
* be misdetected here is rather academic.
*/
static int parport_PS2_supported(struct parport *pb)
{
int ok = 0;
clear_epp_timeout(pb);
/* try to tri-state the buffer */
parport_pc_data_reverse(pb);
parport_pc_write_data(pb, 0x55);
if (parport_pc_read_data(pb) != 0x55)
ok++;
parport_pc_write_data(pb, 0xaa);
if (parport_pc_read_data(pb) != 0xaa)
ok++;
/* cancel input mode */
parport_pc_data_forward(pb);
if (ok) {
pb->modes |= PARPORT_MODE_TRISTATE;
} else {
struct parport_pc_private *priv = pb->private_data;
priv->ctr_writable &= ~0x20;
}
return ok;
}
#ifdef CONFIG_PARPORT_PC_FIFO
static int parport_ECP_supported(struct parport *pb)
{
int i;
int config, configb;
int pword;
struct parport_pc_private *priv = pb->private_data;
/* Translate ECP intrLine to ISA irq value */
static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 };
/* If there is no ECR, we have no hope of supporting ECP. */
if (!priv->ecr)
return 0;
/* Find out FIFO depth */
ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */
for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++)
outb(0xaa, FIFO(pb));
/*
* Using LGS chipset it uses ECR register, but
* it doesn't support ECP or FIFO MODE
*/
if (i == 1024) {
ECR_WRITE(pb, ECR_SPP << 5);
return 0;
}
priv->fifo_depth = i;
if (verbose_probing)
printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
/* Find out writeIntrThreshold */
frob_econtrol(pb, 1<<2, 1<<2);
frob_econtrol(pb, 1<<2, 0);
for (i = 1; i <= priv->fifo_depth; i++) {
inb(FIFO(pb));
udelay(50);
if (inb(ECONTROL(pb)) & (1<<2))
break;
}
if (i <= priv->fifo_depth) {
if (verbose_probing)
printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
pb->base, i);
} else
/* Number of bytes we know we can write if we get an
interrupt. */
i = 0;
priv->writeIntrThreshold = i;
/* Find out readIntrThreshold */
frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */
parport_pc_data_reverse(pb); /* Must be in PS2 mode */
frob_set_mode(pb, ECR_TST); /* Test FIFO */
frob_econtrol(pb, 1<<2, 1<<2);
frob_econtrol(pb, 1<<2, 0);
for (i = 1; i <= priv->fifo_depth; i++) {
outb(0xaa, FIFO(pb));
if (inb(ECONTROL(pb)) & (1<<2))
break;
}
if (i <= priv->fifo_depth) {
if (verbose_probing)
pr_info("0x%lx: readIntrThreshold is %d\n",
pb->base, i);
} else
/* Number of bytes we can read if we get an interrupt. */
i = 0;
priv->readIntrThreshold = i;
ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
ECR_WRITE(pb, 0xf4); /* Configuration mode */
config = inb(CONFIGA(pb));
pword = (config >> 4) & 0x7;
switch (pword) {
case 0:
pword = 2;
pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
break;
case 2:
pword = 4;
pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
break;
default:
pr_warn("0x%lx: Unknown implementation ID\n", pb->base);
fallthrough; /* Assume 1 */
case 1:
pword = 1;
}
priv->pword = pword;
if (verbose_probing) {
printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
pb->base, 8 * pword);
printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n",
pb->base, config & 0x80 ? "Level" : "Pulses");
configb = inb(CONFIGB(pb));
printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
pb->base, config, configb);
printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
if ((configb >> 3) & 0x07)
pr_cont("%d", intrline[(configb >> 3) & 0x07]);
else
pr_cont("<none or set by other means>");
pr_cont(" dma=");
if ((configb & 0x03) == 0x00)
pr_cont("<none or set by other means>\n");
else
pr_cont("%d\n", configb & 0x07);
}
/* Go back to mode 000 */
frob_set_mode(pb, ECR_SPP);
return 1;
}
#endif
#ifdef CONFIG_X86_32
static int intel_bug_present_check_epp(struct parport *pb)
{
const struct parport_pc_private *priv = pb->private_data;
int bug_present = 0;
if (priv->ecr) {
/* store value of ECR */
unsigned char ecr = inb(ECONTROL(pb));
unsigned char i;
for (i = 0x00; i < 0x80; i += 0x20) {
ECR_WRITE(pb, i);
if (clear_epp_timeout(pb)) {
/* Phony EPP in ECP. */
bug_present = 1;
break;
}
}
/* return ECR into the inital state */
ECR_WRITE(pb, ecr);
}
return bug_present;
}
static int intel_bug_present(struct parport *pb)
{
/* Check whether the device is legacy, not PCI or PCMCIA. Only legacy is known to be affected. */
if (pb->dev != NULL) {
return 0;
}
return intel_bug_present_check_epp(pb);
}
#else
static int intel_bug_present(struct parport *pb)
{
return 0;
}
#endif /* CONFIG_X86_32 */
static int parport_ECPPS2_supported(struct parport *pb)
{
const struct parport_pc_private *priv = pb->private_data;
int result;
unsigned char oecr;
if (!priv->ecr)
return 0;
oecr = inb(ECONTROL(pb));
ECR_WRITE(pb, ECR_PS2 << 5);
result = parport_PS2_supported(pb);
ECR_WRITE(pb, oecr);
return result;
}
/* EPP mode detection */
static int parport_EPP_supported(struct parport *pb)
{
/*
* Theory:
* Bit 0 of STR is the EPP timeout bit, this bit is 0
* when EPP is possible and is set high when an EPP timeout
* occurs (EPP uses the HALT line to stop the CPU while it does
* the byte transfer, an EPP timeout occurs if the attached
* device fails to respond after 10 micro seconds).
*
* This bit is cleared by either reading it (National Semi)
* or writing a 1 to the bit (SMC, UMC, WinBond), others ???
* This bit is always high in non EPP modes.
*/
/* If EPP timeout bit clear then EPP available */
if (!clear_epp_timeout(pb))
return 0; /* No way to clear timeout */
/* Check for Intel bug. */
if (intel_bug_present(pb))
return 0;
pb->modes |= PARPORT_MODE_EPP;
/* Set up access functions to use EPP hardware. */
pb->ops->epp_read_data = parport_pc_epp_read_data;
pb->ops->epp_write_data = parport_pc_epp_write_data;
pb->ops->epp_read_addr = parport_pc_epp_read_addr;
pb->ops->epp_write_addr = parport_pc_epp_write_addr;
return 1;
}
static int parport_ECPEPP_supported(struct parport *pb)
{
struct parport_pc_private *priv = pb->private_data;
int result;
unsigned char oecr;
if (!priv->ecr)
return 0;
oecr = inb(ECONTROL(pb));
/* Search for SMC style EPP+ECP mode */
ECR_WRITE(pb, 0x80);
outb(0x04, CONTROL(pb));
result = parport_EPP_supported(pb);
ECR_WRITE(pb, oecr);
if (result) {
/* Set up access functions to use ECP+EPP hardware. */
pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
}
return result;
}
#else /* No IEEE 1284 support */
/* Don't bother probing for modes we know we won't use. */
static int parport_PS2_supported(struct parport *pb) { return 0; }
#ifdef CONFIG_PARPORT_PC_FIFO
static int parport_ECP_supported(struct parport *pb)
{
return 0;
}
#endif
static int parport_EPP_supported(struct parport *pb)
{
return 0;
}
static int parport_ECPEPP_supported(struct parport *pb)
{
return 0;
}
static int parport_ECPPS2_supported(struct parport *pb)
{
return 0;
}
#endif /* No IEEE 1284 support */
/* --- IRQ detection -------------------------------------- */
/* Only if supports ECP mode */
static int programmable_irq_support(struct parport *pb)
{
int irq, intrLine;
unsigned char oecr = inb(ECONTROL(pb));
static const int lookup[8] = {
PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
};
ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
irq = lookup[intrLine];
ECR_WRITE(pb, oecr);
return irq;
}
static int irq_probe_ECP(struct parport *pb)
{
int i;
unsigned long irqs;
irqs = probe_irq_on();
ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
ECR_WRITE(pb, ECR_TST << 5);
/* If Full FIFO sure that writeIntrThreshold is generated */
for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++)
outb(0xaa, FIFO(pb));
pb->irq = probe_irq_off(irqs);
ECR_WRITE(pb, ECR_SPP << 5);
if (pb->irq <= 0)
pb->irq = PARPORT_IRQ_NONE;
return pb->irq;
}
/*
* This detection seems that only works in National Semiconductors
* This doesn't work in SMC, LGS, and Winbond
*/
static int irq_probe_EPP(struct parport *pb)
{
#ifndef ADVANCED_DETECT
return PARPORT_IRQ_NONE;
#else
int irqs;
unsigned char oecr;
if (pb->modes & PARPORT_MODE_PCECR)
oecr = inb(ECONTROL(pb));
irqs = probe_irq_on();
if (pb->modes & PARPORT_MODE_PCECR)
frob_econtrol(pb, 0x10, 0x10);
clear_epp_timeout(pb);
parport_pc_frob_control(pb, 0x20, 0x20);
parport_pc_frob_control(pb, 0x10, 0x10);
clear_epp_timeout(pb);
/* Device isn't expecting an EPP read
* and generates an IRQ.
*/
parport_pc_read_epp(pb);
udelay(20);
pb->irq = probe_irq_off(irqs);
if (pb->modes & PARPORT_MODE_PCECR)
ECR_WRITE(pb, oecr);
parport_pc_write_control(pb, 0xc);
if (pb->irq <= 0)
pb->irq = PARPORT_IRQ_NONE;
return pb->irq;
#endif /* Advanced detection */
}
static int irq_probe_SPP(struct parport *pb)
{
/* Don't even try to do this. */
return PARPORT_IRQ_NONE;
}
/* We will attempt to share interrupt requests since other devices
* such as sound cards and network cards seem to like using the
* printer IRQs.
*
* When ECP is available we can autoprobe for IRQs.
* NOTE: If we can autoprobe it, we can register the IRQ.
*/
static int parport_irq_probe(struct parport *pb)
{
struct parport_pc_private *priv = pb->private_data;
if (priv->ecr) {
pb->irq = programmable_irq_support(pb);
if (pb->irq == PARPORT_IRQ_NONE)
pb->irq = irq_probe_ECP(pb);
}
if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
(pb->modes & PARPORT_MODE_EPP))
pb->irq = irq_probe_EPP(pb);
clear_epp_timeout(pb);
if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
pb->irq = irq_probe_EPP(pb);
clear_epp_timeout(pb);
if (pb->irq == PARPORT_IRQ_NONE)
pb->irq = irq_probe_SPP(pb);
if (pb->irq == PARPORT_IRQ_NONE)
pb->irq = get_superio_irq(pb);
return pb->irq;
}
/* --- DMA detection -------------------------------------- */
/* Only if chipset conforms to ECP ISA Interface Standard */
static int programmable_dma_support(struct parport *p)
{
unsigned char oecr = inb(ECONTROL(p));
int dma;
frob_set_mode(p, ECR_CNF);
dma = inb(CONFIGB(p)) & 0x07;
/* 000: Indicates jumpered 8-bit DMA if read-only.
100: Indicates jumpered 16-bit DMA if read-only. */
if ((dma & 0x03) == 0)
dma = PARPORT_DMA_NONE;
ECR_WRITE(p, oecr);
return dma;
}
static int parport_dma_probe(struct parport *p)
{
const struct parport_pc_private *priv = p->private_data;
if (priv->ecr) /* ask ECP chipset first */
p->dma = programmable_dma_support(p);
if (p->dma == PARPORT_DMA_NONE) {
/* ask known Super-IO chips proper, although these
claim ECP compatible, some don't report their DMA
conforming to ECP standards */
p->dma = get_superio_dma(p);
}
return p->dma;
}
/* --- Initialisation code -------------------------------- */
static LIST_HEAD(ports_list);
static DEFINE_SPINLOCK(ports_lock);
struct parport *parport_pc_probe_port(unsigned long int base,
unsigned long int base_hi,
int irq, int dma,
struct device *dev,
int irqflags)
{
struct parport_pc_private *priv;
struct parport_operations *ops;
struct parport *p;
int probedirq = PARPORT_IRQ_NONE;
struct resource *base_res;
struct resource *ECR_res = NULL;
struct resource *EPP_res = NULL;
struct platform_device *pdev = NULL;
int ret;
if (!dev) {
/* We need a physical device to attach to, but none was
* provided. Create our own. */
pdev = platform_device_register_simple("parport_pc",
base, NULL, 0);
if (IS_ERR(pdev))
return NULL;
dev = &pdev->dev;
ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
if (ret) {
dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
dma = PARPORT_DMA_NONE;
}
}
ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
if (!ops)
goto out1;
priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
if (!priv)
goto out2;
/* a misnomer, actually - it's allocate and reserve parport number */
p = parport_register_port(base, irq, dma, ops);
if (!p)
goto out3;
base_res = request_region(base, 3, p->name);
if (!base_res)
goto out4;
memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
priv->ctr = 0xc;
priv->ctr_writable = ~0x10;
priv->ecr = 0;
priv->fifo_depth = 0;
priv->dma_buf = NULL;
priv->dma_handle = 0;
INIT_LIST_HEAD(&priv->list);
priv->port = p;
p->dev = dev;
p->base_hi = base_hi;
p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
p->private_data = priv;
if (base_hi) {
ECR_res = request_region(base_hi, 3, p->name);
if (ECR_res)
parport_ECR_present(p);
}
if (base != 0x3bc) {
EPP_res = request_region(base+0x3, 5, p->name);
if (EPP_res)
if (!parport_EPP_supported(p))
parport_ECPEPP_supported(p);
}
if (!parport_SPP_supported(p))
/* No port. */
goto out5;
if (priv->ecr)
parport_ECPPS2_supported(p);
else
parport_PS2_supported(p);
p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
pr_info("%s: PC-style at 0x%lx", p->name, p->base);
if (p->base_hi && priv->ecr)
pr_cont(" (0x%lx)", p->base_hi);
if (p->irq == PARPORT_IRQ_AUTO) {
p->irq = PARPORT_IRQ_NONE;
parport_irq_probe(p);
} else if (p->irq == PARPORT_IRQ_PROBEONLY) {
p->irq = PARPORT_IRQ_NONE;
parport_irq_probe(p);
probedirq = p->irq;
p->irq = PARPORT_IRQ_NONE;
}
if (p->irq != PARPORT_IRQ_NONE) {
pr_cont(", irq %d", p->irq);
priv->ctr_writable |= 0x10;
if (p->dma == PARPORT_DMA_AUTO) {
p->dma = PARPORT_DMA_NONE;
parport_dma_probe(p);
}
}
if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
is mandatory (see above) */
p->dma = PARPORT_DMA_NONE;
#ifdef CONFIG_PARPORT_PC_FIFO
if (parport_ECP_supported(p) &&
p->dma != PARPORT_DMA_NOFIFO &&
priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
p->ops->compat_write_data = parport_pc_compat_write_block_pio;
#ifdef CONFIG_PARPORT_1284
p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
/* currently broken, but working on it.. (FB) */
/* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
#endif /* IEEE 1284 support */
if (p->dma != PARPORT_DMA_NONE) {
pr_cont(", dma %d", p->dma);
p->modes |= PARPORT_MODE_DMA;
} else
pr_cont(", using FIFO");
} else
/* We can't use the DMA channel after all. */
p->dma = PARPORT_DMA_NONE;
#endif /* Allowed to use FIFO/DMA */
pr_cont(" [");
#define printmode(x) \
do { \
if (p->modes & PARPORT_MODE_##x) \
pr_cont("%s%s", f++ ? "," : "", #x); \
} while (0)
{
int f = 0;
printmode(PCSPP);
printmode(TRISTATE);
printmode(COMPAT);
printmode(EPP);
printmode(ECP);
printmode(DMA);
}
#undef printmode
#ifndef CONFIG_PARPORT_1284
pr_cont("(,...)");
#endif /* CONFIG_PARPORT_1284 */
pr_cont("]\n");
if (probedirq != PARPORT_IRQ_NONE)
pr_info("%s: irq %d detected\n", p->name, probedirq);
/* If No ECP release the ports grabbed above. */
if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
release_region(base_hi, 3);
ECR_res = NULL;
}
/* Likewise for EEP ports */
if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
release_region(base+3, 5);
EPP_res = NULL;
}
if (p->irq != PARPORT_IRQ_NONE) {
if (request_irq(p->irq, parport_irq_handler,
irqflags, p->name, p)) {
pr_warn("%s: irq %d in use, resorting to polled operation\n",
p->name, p->irq);
p->irq = PARPORT_IRQ_NONE;
p->dma = PARPORT_DMA_NONE;
}
#ifdef CONFIG_PARPORT_PC_FIFO
#ifdef HAS_DMA
if (p->dma != PARPORT_DMA_NONE) {
if (request_dma(p->dma, p->name)) {
pr_warn("%s: dma %d in use, resorting to PIO operation\n",
p->name, p->dma);
p->dma = PARPORT_DMA_NONE;
} else {
priv->dma_buf =
dma_alloc_coherent(dev,
PAGE_SIZE,
&priv->dma_handle,
GFP_KERNEL);
if (!priv->dma_buf) {
pr_warn("%s: cannot get buffer for DMA, resorting to PIO operation\n",
p->name);
free_dma(p->dma);
p->dma = PARPORT_DMA_NONE;
}
}
}
#endif
#endif
}
/* Done probing. Now put the port into a sensible start-up state. */
if (priv->ecr)
/*
* Put the ECP detected port in PS2 mode.
* Do this also for ports that have ECR but don't do ECP.
*/
ECR_WRITE(p, 0x34);
parport_pc_write_data(p, 0);
parport_pc_data_forward(p);
/* Now that we've told the sharing engine about the port, and
found out its characteristics, let the high-level drivers
know about it. */
spin_lock(&ports_lock);
list_add(&priv->list, &ports_list);
spin_unlock(&ports_lock);
parport_announce_port(p);
return p;
out5:
if (ECR_res)
release_region(base_hi, 3);
if (EPP_res)
release_region(base+0x3, 5);
release_region(base, 3);
out4:
parport_del_port(p);
out3:
kfree(priv);
out2:
kfree(ops);
out1:
if (pdev)
platform_device_unregister(pdev);
return NULL;
}
EXPORT_SYMBOL(parport_pc_probe_port);
void parport_pc_unregister_port(struct parport *p)
{
struct parport_pc_private *priv = p->private_data;
struct parport_operations *ops = p->ops;
parport_remove_port(p);
spin_lock(&ports_lock);
list_del_init(&priv->list);
spin_unlock(&ports_lock);
#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
if (p->dma != PARPORT_DMA_NONE)
free_dma(p->dma);
#endif
if (p->irq != PARPORT_IRQ_NONE)
free_irq(p->irq, p);
release_region(p->base, 3);
if (p->size > 3)
release_region(p->base + 3, p->size - 3);
if (p->modes & PARPORT_MODE_ECP)
release_region(p->base_hi, 3);
#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
if (priv->dma_buf)
dma_free_coherent(p->physport->dev, PAGE_SIZE,
priv->dma_buf,
priv->dma_handle);
#endif
kfree(p->private_data);
parport_del_port(p);
kfree(ops); /* hope no-one cached it */
}
EXPORT_SYMBOL(parport_pc_unregister_port);
#ifdef CONFIG_PCI
/* ITE support maintained by Rich Liu <richliu@poorman.org> */
static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
const struct parport_pc_via_data *via)
{
short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
u32 ite8872set;
u32 ite8872_lpt, ite8872_lpthi;
u8 ite8872_irq, type;
int irq;
int i;
pr_debug("sio_ite_8872_probe()\n");
/* make sure which one chip */
for (i = 0; i < 5; i++) {
if (request_region(inta_addr[i], 32, "it887x")) {
int test;
pci_write_config_dword(pdev, 0x60,
0xe5000000 | inta_addr[i]);
pci_write_config_dword(pdev, 0x78,
0x00000000 | inta_addr[i]);
test = inb(inta_addr[i]);
if (test != 0xff)
break;
release_region(inta_addr[i], 32);
}
}
if (i >= 5) {
pr_info("parport_pc: cannot find ITE8872 INTA\n");
return 0;
}
type = inb(inta_addr[i] + 0x18);
type &= 0x0f;
switch (type) {
case 0x2:
pr_info("parport_pc: ITE8871 found (1P)\n");
ite8872set = 0x64200000;
break;
case 0xa:
pr_info("parport_pc: ITE8875 found (1P)\n");
ite8872set = 0x64200000;
break;
case 0xe:
pr_info("parport_pc: ITE8872 found (2S1P)\n");
ite8872set = 0x64e00000;
break;
case 0x6:
pr_info("parport_pc: ITE8873 found (1S)\n");
release_region(inta_addr[i], 32);
return 0;
case 0x8:
pr_info("parport_pc: ITE8874 found (2S)\n");
release_region(inta_addr[i], 32);
return 0;
default:
pr_info("parport_pc: unknown ITE887x\n");
pr_info("parport_pc: please mail 'lspci -nvv' output to Rich.Liu@ite.com.tw\n");
release_region(inta_addr[i], 32);
return 0;
}
pci_read_config_byte(pdev, 0x3c, &ite8872_irq);
pci_read_config_dword(pdev, 0x1c, &ite8872_lpt);
ite8872_lpt &= 0x0000ff00;
pci_read_config_dword(pdev, 0x20, &ite8872_lpthi);
ite8872_lpthi &= 0x0000ff00;
pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt);
pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi);
pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
/* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */
/* SET Parallel IRQ */
pci_write_config_dword(pdev, 0x9c,
ite8872set | (ite8872_irq * 0x11111));
pr_debug("ITE887x: The IRQ is %d\n", ite8872_irq);
pr_debug("ITE887x: The PARALLEL I/O port is 0x%x\n", ite8872_lpt);
pr_debug("ITE887x: The PARALLEL I/O porthi is 0x%x\n", ite8872_lpthi);
/* Let the user (or defaults) steer us away from interrupts */
irq = ite8872_irq;
if (autoirq != PARPORT_IRQ_AUTO)
irq = PARPORT_IRQ_NONE;
/*
* Release the resource so that parport_pc_probe_port can get it.
*/
release_region(inta_addr[i], 32);
if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi,
irq, PARPORT_DMA_NONE, &pdev->dev, 0)) {
pr_info("parport_pc: ITE 8872 parallel port: io=0x%X",
ite8872_lpt);
if (irq != PARPORT_IRQ_NONE)
pr_cont(", irq=%d", irq);
pr_cont("\n");
return 1;
}
return 0;
}
/* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
static int parport_init_mode;
/* Data for two known VIA chips */
static struct parport_pc_via_data via_686a_data = {
0x51,
0x50,
0x85,
0x02,
0xE2,
0xF0,
0xE6
};
static struct parport_pc_via_data via_8231_data = {
0x45,
0x44,
0x50,
0x04,
0xF2,
0xFA,
0xF6
};
static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma,
const struct parport_pc_via_data *via)
{
u8 tmp, tmp2, siofunc;
u8 ppcontrol = 0;
int dma, irq;
unsigned port1, port2;
unsigned have_epp = 0;
printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
switch (parport_init_mode) {
case 1:
printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
siofunc = VIA_FUNCTION_PARPORT_SPP;
break;
case 2:
printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
siofunc = VIA_FUNCTION_PARPORT_SPP;
ppcontrol = VIA_PARPORT_BIDIR;
break;
case 3:
printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
siofunc = VIA_FUNCTION_PARPORT_EPP;
ppcontrol = VIA_PARPORT_BIDIR;
have_epp = 1;
break;
case 4:
printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
siofunc = VIA_FUNCTION_PARPORT_ECP;
ppcontrol = VIA_PARPORT_BIDIR;
break;
case 5:
printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
siofunc = VIA_FUNCTION_PARPORT_ECP;
ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
have_epp = 1;
break;
default:
printk(KERN_DEBUG "parport_pc: probing current configuration\n");
siofunc = VIA_FUNCTION_PROBE;
break;
}
/*
* unlock super i/o configuration
*/
pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
tmp |= via->via_pci_superio_config_data;
pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
/* Bits 1-0: Parallel Port Mode / Enable */
outb(via->viacfg_function, VIA_CONFIG_INDEX);
tmp = inb(VIA_CONFIG_DATA);
/* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
tmp2 = inb(VIA_CONFIG_DATA);
if (siofunc == VIA_FUNCTION_PROBE) {
siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
ppcontrol = tmp2;
} else {
tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
tmp |= siofunc;
outb(via->viacfg_function, VIA_CONFIG_INDEX);
outb(tmp, VIA_CONFIG_DATA);
tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
tmp2 |= ppcontrol;
outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
outb(tmp2, VIA_CONFIG_DATA);
}
/* Parallel Port I/O Base Address, bits 9-2 */
outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
port1 = inb(VIA_CONFIG_DATA) << 2;
printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
port1);
if (port1 == 0x3BC && have_epp) {
outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
outb((0x378 >> 2), VIA_CONFIG_DATA);
printk(KERN_DEBUG "parport_pc: Parallel port base changed to 0x378\n");
port1 = 0x378;
}
/*
* lock super i/o configuration
*/
pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
tmp &= ~via->via_pci_superio_config_data;
pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
pr_info("parport_pc: VIA parallel port disabled in BIOS\n");
return 0;
}
/* Bits 7-4: PnP Routing for Parallel Port IRQ */
pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
if (siofunc == VIA_FUNCTION_PARPORT_ECP) {
/* Bits 3-2: PnP Routing for Parallel Port DMA */
pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
} else
/* if ECP not enabled, DMA is not enabled, assumed
bogus 'dma' value */
dma = PARPORT_DMA_NONE;
/* Let the user (or defaults) steer us away from interrupts and DMA */
if (autoirq == PARPORT_IRQ_NONE) {
irq = PARPORT_IRQ_NONE;
dma = PARPORT_DMA_NONE;
}
if (autodma == PARPORT_DMA_NONE)
dma = PARPORT_DMA_NONE;
switch (port1) {
case 0x3bc:
port2 = 0x7bc; break;
case 0x378:
port2 = 0x778; break;
case 0x278:
port2 = 0x678; break;
default:
pr_info("parport_pc: Weird VIA parport base 0x%X, ignoring\n",
port1);
return 0;
}
/* filter bogus IRQs */
switch (irq) {
case 0:
case 2:
case 8:
case 13:
irq = PARPORT_IRQ_NONE;
break;
default: /* do nothing */
break;
}
/* finally, do the probe with values obtained */
if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) {
pr_info("parport_pc: VIA parallel port: io=0x%X", port1);
if (irq != PARPORT_IRQ_NONE)
pr_cont(", irq=%d", irq);
if (dma != PARPORT_DMA_NONE)
pr_cont(", dma=%d", dma);
pr_cont("\n");
return 1;
}
pr_warn("parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
port1, irq, dma);
return 0;
}
enum parport_pc_sio_types {
sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
sio_ite_8872,
last_sio
};
/* each element directly indexed from enum list, above */
static struct parport_pc_superio {
int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
const struct parport_pc_via_data *via);
const struct parport_pc_via_data *via;
} parport_pc_superio_info[] = {
{ sio_via_probe, &via_686a_data, },
{ sio_via_probe, &via_8231_data, },
{ sio_ite_8872_probe, NULL, },
};
enum parport_pc_pci_cards {
siig_1p_10x = last_sio,
siig_2p_10x,
siig_1p_20x,
siig_2p_20x,
lava_parallel,
lava_parallel_dual_a,
lava_parallel_dual_b,
boca_ioppar,
plx_9050,
timedia_4006a,
timedia_4014,
timedia_4008a,
timedia_4018,
timedia_9018a,
syba_2p_epp,
syba_1p_ecp,
titan_010l,
avlab_1p,
avlab_2p,
oxsemi_952,
oxsemi_954,
oxsemi_840,
oxsemi_pcie_pport,
aks_0100,
mobility_pp,
netmos_9900,
netmos_9705,
netmos_9715,
netmos_9755,
netmos_9805,
netmos_9815,
netmos_9901,
netmos_9865,
quatech_sppxp100,
wch_ch382l,
};
/* each element directly indexed from enum list, above
* (but offset by last_sio) */
static struct parport_pc_pci {
int numports;
struct { /* BAR (base address registers) numbers in the config
space header */
int lo;
int hi;
/* -1 if not there, >6 for offset-method (max BAR is 6) */
} addr[4];
/* If set, this is called immediately after pci_enable_device.
* If it returns non-zero, no probing will take place and the
* ports will not be used. */
int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
/* If set, this is called after probing for ports. If 'failed'
* is non-zero we couldn't use any of the ports. */
void (*postinit_hook) (struct pci_dev *pdev, int failed);
} cards[] = {
/* siig_1p_10x */ { 1, { { 2, 3 }, } },
/* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
/* siig_1p_20x */ { 1, { { 0, 1 }, } },
/* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
/* lava_parallel */ { 1, { { 0, -1 }, } },
/* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
/* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
/* boca_ioppar */ { 1, { { 0, -1 }, } },
/* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
/* timedia_4006a */ { 1, { { 0, -1 }, } },
/* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
/* timedia_4008a */ { 1, { { 0, 1 }, } },
/* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
/* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
/* SYBA uses fixed offsets in
a 1K io window */
/* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
/* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
/* titan_010l */ { 1, { { 3, -1 }, } },
/* avlab_1p */ { 1, { { 0, 1}, } },
/* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
/* The Oxford Semi cards are unusual: 954 doesn't support ECP,
* and 840 locks up if you write 1 to bit 2! */
/* oxsemi_952 */ { 1, { { 0, 1 }, } },
/* oxsemi_954 */ { 1, { { 0, -1 }, } },
/* oxsemi_840 */ { 1, { { 0, 1 }, } },
/* oxsemi_pcie_pport */ { 1, { { 0, 1 }, } },
/* aks_0100 */ { 1, { { 0, -1 }, } },
/* mobility_pp */ { 1, { { 0, 1 }, } },
/* netmos_9900 */ { 1, { { 0, -1 }, } },
/* The netmos entries below are untested */
/* netmos_9705 */ { 1, { { 0, -1 }, } },
/* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
/* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
/* netmos_9805 */ { 1, { { 0, 1 }, } },
/* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } },
/* netmos_9901 */ { 1, { { 0, -1 }, } },
/* netmos_9865 */ { 1, { { 0, -1 }, } },
/* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
/* wch_ch382l */ { 1, { { 2, -1 }, } },
};
static const struct pci_device_id parport_pc_pci_tbl[] = {
/* Super-IO onboard chips */
{ 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
{ 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
{ PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
/* PCI cards */
{ PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
{ PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
{ PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
{ PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
{ PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
{ PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
{ PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
{ PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
/* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
{ 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
{ 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
{ 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
{ 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
{ 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
{ PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
{ PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
/* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
/* AFAVLAB_TK9902 */
{ 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
{ 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
{ PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
{ 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
/* NetMos communication controllers */
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900,
0xA000, 0x2000, 0, 0, netmos_9900 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
0xA000, 0x2000, 0, 0, netmos_9901 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
0xA000, 0x1000, 0, 0, netmos_9865 },
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
0xA000, 0x2000, 0, 0, netmos_9865 },
/* Quatech SPPXP-100 Parallel port PCI ExpressCard */
{ PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
/* WCH CH382L PCI-E single parallel port card */
{ 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l },
{ 0, } /* terminate list */
};
MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
struct pci_parport_data {
int num;
struct parport *ports[2];
};
static int parport_pc_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
int err, count, n, i = id->driver_data;
struct pci_parport_data *data;
if (i < last_sio)
/* This is an onboard Super-IO and has already been probed */
return 0;
/* This is a PCI card */
i -= last_sio;
count = 0;
err = pci_enable_device(dev);
if (err)
return err;
data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
if (cards[i].preinit_hook &&
cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
kfree(data);
return -ENODEV;
}
for (n = 0; n < cards[i].numports; n++) {
int lo = cards[i].addr[n].lo;
int hi = cards[i].addr[n].hi;
int irq;
unsigned long io_lo, io_hi;
io_lo = pci_resource_start(dev, lo);
io_hi = 0;
if ((hi >= 0) && (hi <= 6))
io_hi = pci_resource_start(dev, hi);
else if (hi > 6)
io_lo += hi; /* Reinterpret the meaning of
"hi" as an offset (see SYBA
def.) */
/* TODO: test if sharing interrupts works */
irq = dev->irq;
if (irq == IRQ_NONE) {
printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
id->vendor, id->device, io_lo, io_hi);
irq = PARPORT_IRQ_NONE;
} else {
printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
id->vendor, id->device, io_lo, io_hi, irq);
}
data->ports[count] =
parport_pc_probe_port(io_lo, io_hi, irq,
PARPORT_DMA_NONE, &dev->dev,
IRQF_SHARED);
if (data->ports[count])
count++;
}
data->num = count;
if (cards[i].postinit_hook)
cards[i].postinit_hook(dev, count == 0);
if (count) {
pci_set_drvdata(dev, data);
return 0;
}
kfree(data);
return -ENODEV;
}
static void parport_pc_pci_remove(struct pci_dev *dev)
{
struct pci_parport_data *data = pci_get_drvdata(dev);
int i;
if (data) {
for (i = data->num - 1; i >= 0; i--)
parport_pc_unregister_port(data->ports[i]);
kfree(data);
}
}
static struct pci_driver parport_pc_pci_driver = {
.name = "parport_pc",
.id_table = parport_pc_pci_tbl,
.probe = parport_pc_pci_probe,
.remove = parport_pc_pci_remove,
};
static int __init parport_pc_init_superio(int autoirq, int autodma)
{
const struct pci_device_id *id;
struct pci_dev *pdev = NULL;
int ret = 0;
for_each_pci_dev(pdev) {
id = pci_match_id(parport_pc_pci_tbl, pdev);
if (id == NULL || id->driver_data >= last_sio)
continue;
if (parport_pc_superio_info[id->driver_data].probe(
pdev, autoirq, autodma,
parport_pc_superio_info[id->driver_data].via)) {
ret++;
}
}
return ret; /* number of devices found */
}
#else
static struct pci_driver parport_pc_pci_driver;
static int __init parport_pc_init_superio(int autoirq, int autodma)
{
return 0;
}
#endif /* CONFIG_PCI */
#ifdef CONFIG_PNP
static const struct pnp_device_id parport_pc_pnp_tbl[] = {
/* Standard LPT Printer Port */
{.id = "PNP0400", .driver_data = 0},
/* ECP Printer Port */
{.id = "PNP0401", .driver_data = 0},
{ }
};
MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
static int parport_pc_pnp_probe(struct pnp_dev *dev,
const struct pnp_device_id *id)
{
struct parport *pdata;
unsigned long io_lo, io_hi;
int dma, irq;
if (pnp_port_valid(dev, 0) &&
!(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
io_lo = pnp_port_start(dev, 0);
} else
return -EINVAL;
if (pnp_port_valid(dev, 1) &&
!(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
io_hi = pnp_port_start(dev, 1);
} else
io_hi = 0;
if (pnp_irq_valid(dev, 0) &&
!(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
irq = pnp_irq(dev, 0);
} else
irq = PARPORT_IRQ_NONE;
if (pnp_dma_valid(dev, 0) &&
!(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
dma = pnp_dma(dev, 0);
} else
dma = PARPORT_DMA_NONE;
dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
if (pdata == NULL)
return -ENODEV;
pnp_set_drvdata(dev, pdata);
return 0;
}
static void parport_pc_pnp_remove(struct pnp_dev *dev)
{
struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
if (!pdata)
return;
parport_pc_unregister_port(pdata);
}
/* we only need the pnp layer to activate the device, at least for now */
static struct pnp_driver parport_pc_pnp_driver = {
.name = "parport_pc",
.id_table = parport_pc_pnp_tbl,
.probe = parport_pc_pnp_probe,
.remove = parport_pc_pnp_remove,
};
#else
static struct pnp_driver parport_pc_pnp_driver;
#endif /* CONFIG_PNP */
static int parport_pc_platform_probe(struct platform_device *pdev)
{
/* Always succeed, the actual probing is done in
* parport_pc_probe_port(). */
return 0;
}
static struct platform_driver parport_pc_platform_driver = {
.driver = {
.name = "parport_pc",
},
.probe = parport_pc_platform_probe,
};
/* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
static int __attribute__((unused))
parport_pc_find_isa_ports(int autoirq, int autodma)
{
int count = 0;
if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
count++;
if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
count++;
if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
count++;
return count;
}
/* This function is called by parport_pc_init if the user didn't
* specify any ports to probe. Its job is to find some ports. Order
* is important here -- we want ISA ports to be registered first,
* followed by PCI cards (for least surprise), but before that we want
* to do chipset-specific tests for some onboard ports that we know
* about.
*
* autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
* autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
*/
static void __init parport_pc_find_ports(int autoirq, int autodma)
{
int count = 0, err;
#ifdef CONFIG_PARPORT_PC_SUPERIO
detect_and_report_it87();
detect_and_report_winbond();
detect_and_report_smsc();
#endif
/* Onboard SuperIO chipsets that show themselves on the PCI bus. */
count += parport_pc_init_superio(autoirq, autodma);
/* PnP ports, skip detection if SuperIO already found them */
if (!count) {
err = pnp_register_driver(&parport_pc_pnp_driver);
if (!err)
pnp_registered_parport = 1;
}
/* ISA ports and whatever (see asm/parport.h). */
parport_pc_find_nonpci_ports(autoirq, autodma);
err = pci_register_driver(&parport_pc_pci_driver);
if (!err)
pci_registered_parport = 1;
}
/*
* Piles of crap below pretend to be a parser for module and kernel
* parameters. Say "thank you" to whoever had come up with that
* syntax and keep in mind that code below is a cleaned up version.
*/
static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
[0 ... PARPORT_PC_MAX_PORTS] = 0
};
static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
[0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
};
static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
[0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
};
static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
[0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
};
static int __init parport_parse_param(const char *s, int *val,
int automatic, int none, int nofifo)
{
if (!s)
return 0;
if (!strncmp(s, "auto", 4))
*val = automatic;
else if (!strncmp(s, "none", 4))
*val = none;
else if (nofifo && !strncmp(s, "nofifo", 6))
*val = nofifo;
else {
char *ep;
unsigned long r = simple_strtoul(s, &ep, 0);
if (ep != s)
*val = r;
else {
pr_err("parport: bad specifier `%s'\n", s);
return -1;
}
}
return 0;
}
static int __init parport_parse_irq(const char *irqstr, int *val)
{
return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
PARPORT_IRQ_NONE, 0);
}
static int __init parport_parse_dma(const char *dmastr, int *val)
{
return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
}
#ifdef CONFIG_PCI
static int __init parport_init_mode_setup(char *str)
{
printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n",
str);
if (!strcmp(str, "spp"))
parport_init_mode = 1;
if (!strcmp(str, "ps2"))
parport_init_mode = 2;
if (!strcmp(str, "epp"))
parport_init_mode = 3;
if (!strcmp(str, "ecp"))
parport_init_mode = 4;
if (!strcmp(str, "ecpepp"))
parport_init_mode = 5;
return 1;
}
#endif
#ifdef MODULE
static char *irq[PARPORT_PC_MAX_PORTS];
static char *dma[PARPORT_PC_MAX_PORTS];
MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
module_param_hw_array(io, int, ioport, NULL, 0);
MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
module_param_hw_array(io_hi, int, ioport, NULL, 0);
MODULE_PARM_DESC(irq, "IRQ line");
module_param_hw_array(irq, charp, irq, NULL, 0);
MODULE_PARM_DESC(dma, "DMA channel");
module_param_hw_array(dma, charp, dma, NULL, 0);
#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
(defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
module_param(verbose_probing, int, 0644);
#endif
#ifdef CONFIG_PCI
static char *init_mode;
MODULE_PARM_DESC(init_mode,
"Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
module_param(init_mode, charp, 0);
#endif
static int __init parse_parport_params(void)
{
unsigned int i;
int val;
#ifdef CONFIG_PCI
if (init_mode)
parport_init_mode_setup(init_mode);
#endif
for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
if (parport_parse_irq(irq[i], &val))
return 1;
irqval[i] = val;
if (parport_parse_dma(dma[i], &val))
return 1;
dmaval[i] = val;
}
if (!io[0]) {
/* The user can make us use any IRQs or DMAs we find. */
if (irq[0] && !parport_parse_irq(irq[0], &val))
switch (val) {
case PARPORT_IRQ_NONE:
case PARPORT_IRQ_AUTO:
irqval[0] = val;
break;
default:
pr_warn("parport_pc: irq specified without base address. Use 'io=' to specify one\n");
}
if (dma[0] && !parport_parse_dma(dma[0], &val))
switch (val) {
case PARPORT_DMA_NONE:
case PARPORT_DMA_AUTO:
dmaval[0] = val;
break;
default:
pr_warn("parport_pc: dma specified without base address. Use 'io=' to specify one\n");
}
}
return 0;
}
#else
static int parport_setup_ptr __initdata;
/*
* Acceptable parameters:
*
* parport=0
* parport=auto
* parport=0xBASE[,IRQ[,DMA]]
*
* IRQ/DMA may be numeric or 'auto' or 'none'
*/
static int __init parport_setup(char *str)
{
char *endptr;
char *sep;
int val;
if (!str || !*str || (*str == '0' && !*(str+1))) {
/* Disable parport if "parport=0" in cmdline */
io[0] = PARPORT_DISABLE;
return 1;
}
if (!strncmp(str, "auto", 4)) {
irqval[0] = PARPORT_IRQ_AUTO;
dmaval[0] = PARPORT_DMA_AUTO;
return 1;
}
val = simple_strtoul(str, &endptr, 0);
if (endptr == str) {
pr_warn("parport=%s not understood\n", str);
return 1;
}
if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
pr_err("parport=%s ignored, too many ports\n", str);
return 1;
}
io[parport_setup_ptr] = val;
irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
sep = strchr(str, ',');
if (sep++) {
if (parport_parse_irq(sep, &val))
return 1;
irqval[parport_setup_ptr] = val;
sep = strchr(sep, ',');
if (sep++) {
if (parport_parse_dma(sep, &val))
return 1;
dmaval[parport_setup_ptr] = val;
}
}
parport_setup_ptr++;
return 1;
}
static int __init parse_parport_params(void)
{
return io[0] == PARPORT_DISABLE;
}
__setup("parport=", parport_setup);
/*
* Acceptable parameters:
*
* parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
*/
#ifdef CONFIG_PCI
__setup("parport_init_mode=", parport_init_mode_setup);
#endif
#endif
/* "Parser" ends here */
static int __init parport_pc_init(void)
{
int err;
if (parse_parport_params())
return -EINVAL;
err = platform_driver_register(&parport_pc_platform_driver);
if (err)
return err;
if (io[0]) {
int i;
/* Only probe the ports we were given. */
user_specified = 1;
for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
if (!io[i])
break;
if (io_hi[i] == PARPORT_IOHI_AUTO)
io_hi[i] = 0x400 + io[i];
parport_pc_probe_port(io[i], io_hi[i],
irqval[i], dmaval[i], NULL, 0);
}
} else
parport_pc_find_ports(irqval[0], dmaval[0]);
return 0;
}
static void __exit parport_pc_exit(void)
{
if (pci_registered_parport)
pci_unregister_driver(&parport_pc_pci_driver);
if (pnp_registered_parport)
pnp_unregister_driver(&parport_pc_pnp_driver);
platform_driver_unregister(&parport_pc_platform_driver);
while (!list_empty(&ports_list)) {
struct parport_pc_private *priv;
struct parport *port;
struct device *dev;
priv = list_entry(ports_list.next,
struct parport_pc_private, list);
port = priv->port;
dev = port->dev;
parport_pc_unregister_port(port);
if (dev && dev->bus == &platform_bus_type)
platform_device_unregister(to_platform_device(dev));
}
}
MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
MODULE_DESCRIPTION("PC-style parallel port driver");
MODULE_LICENSE("GPL");
module_init(parport_pc_init)
module_exit(parport_pc_exit)