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Subject[PATCH 5/5] Add driver for SUNIX parallel board
Date
Support SUNIX parallel board.

---
char/snx/snx_ieee1284.c | 207 ++++++
char/snx/snx_ieee1284_ops.c | 257 ++++++++
char/snx/snx_lp.c | 1019 +++++++++++++++++++++++++++++
char/snx/snx_parallel.c | 437 +++++++++++++
char/snx/snx_ppdev.c | 1209 +++++++++++++++++++++++++++++++++++
char/snx/snx_share.c | 974 ++++++++++++++++++++++++++++
6 files changed, 4103 insertions(+)
create mode 100644 char/snx/snx_ieee1284.c
create mode 100644 char/snx/snx_ieee1284_ops.c
create mode 100644 char/snx/snx_lp.c
create mode 100644 char/snx/snx_parallel.c
create mode 100644 char/snx/snx_ppdev.c
create mode 100644 char/snx/snx_share.c

diff --git a/char/snx/snx_ieee1284.c b/char/snx/snx_ieee1284.c
new file mode 100644
index 00000000..f357d9bd
--- /dev/null
+++ b/char/snx/snx_ieee1284.c
@@ -0,0 +1,207 @@
+#include "snx_common.h"
+
+
+static void sunix_parport_ieee1284_wakeup(struct snx_parport *port)
+{
+ up(&port->physport->ieee1284.irq);
+}
+
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0))
+static struct snx_parport *port_from_cookie[SNX_PAR_TOTAL_MAX];
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+
+static void sunix_timeout_waiting_on_port(struct timer_list *t)
+{
+ struct snx_parport *port = from_timer(port, t, timer);
+
+ sunix_parport_ieee1284_wakeup(port);
+}
+#else
+
+static void sunix_timeout_waiting_on_port(unsigned long cookie)
+{
+ sunix_parport_ieee1284_wakeup(port_from_cookie[cookie % SNX_PAR_TOTAL_MAX]);
+}
+#endif
+
+
+
+int sunix_parport_wait_event(struct snx_parport *port, signed long timeout)
+{
+ int ret;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+#else
+ struct timer_list timer;
+#endif
+
+ if (!port->physport->cad->timeout) {
+ return 1;
+ }
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+
+ timer_setup(&port->timer, sunix_timeout_waiting_on_port, 0);
+ mod_timer(&port->timer, jiffies + timeout);
+#else
+ init_timer (&timer);
+ timer.expires = jiffies + timeout;
+ timer.function = sunix_timeout_waiting_on_port;
+ port_from_cookie[port->number % PARPORT_MAX] = port;
+ timer.data = port->number;
+
+ add_timer (&timer);
+
+#endif
+ ret = down_interruptible(&port->physport->ieee1284.irq);
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0))
+ if (!del_timer(&port->timer) && !ret)
+#else
+ if (!del_timer(&timer) && !ret)
+#endif
+
+ {
+ ret = 1;
+ }
+
+ return ret;
+}
+
+
+int sunix_parport_poll_peripheral(struct snx_parport *port, unsigned char mask, unsigned char result, int usec)
+{
+ int count = usec / 5 + 2;
+ int i;
+ unsigned char status;
+
+ for (i = 0; i < count; i++) {
+ status = sunix_parport_read_status(port);
+
+ if ((status & mask) == result) {
+ return 0;
+ }
+
+ if (signal_pending(current)) {
+ return -EINTR;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 19))
+ if (need_resched()) {
+ break;
+ }
+#else
+ if (current->need_resched) {
+ break;
+ }
+#endif
+ if (i >= 2) {
+ udelay (5);
+ }
+ }
+
+ return 1;
+}
+
+
+int sunix_parport_wait_peripheral(struct snx_parport *port, unsigned char mask, unsigned char result)
+{
+ int ret;
+ int usec;
+ unsigned long deadline;
+ unsigned char status;
+
+ usec = port->physport->spintime;// usecs of fast polling
+
+ if (!port->physport->cad->timeout) {
+ usec = 35000;
+ }
+
+ ret = sunix_parport_poll_peripheral(port, mask, result, usec);
+
+ if (ret != 1) {
+ return ret;
+ }
+
+ if (!port->physport->cad->timeout) {
+ return 1;
+ }
+
+ deadline = jiffies + (HZ + 24) / 25;
+
+ while (time_before(jiffies, deadline)) {
+ int ret;
+
+ if (signal_pending(current)) {
+ return -EINTR;
+ }
+
+ //if ((ret = sunix_parport_wait_event(port, (HZ + 99) / 100)) < 0) {
+ ret = sunix_parport_wait_event (port, (HZ + 99) / 100);
+ if (ret < 0) {
+ return ret;
+ }
+
+ status = sunix_parport_read_status(port);
+ if ((status & mask) == result) {
+ return 0;
+ }
+
+ if (!ret) {
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 13))
+ __set_current_state (TASK_INTERRUPTIBLE);
+ schedule_timeout ((HZ + 99) / 100);
+#else
+ schedule_timeout_interruptible(msecs_to_jiffies(10));
+#endif
+ }
+ }
+
+ return 1;
+}
+
+
+int sunix_parport_negotiate(struct snx_parport *port, int mode)
+{
+ if (mode == IEEE1284_MODE_COMPAT) {
+ return 0;
+ }
+
+ return -1;
+}
+
+
+ssize_t sunix_parport_write(struct snx_parport *port, const void *buffer, size_t len)
+{
+ ssize_t ret;
+ ret = port->ops->compat_write_data(port, buffer, len, 0);
+
+ return ret;
+}
+
+
+ssize_t sunix_parport_read(struct snx_parport *port, void *buffer, size_t len)
+{
+ printk("SNX Warng: parport%d IEEE1284 not supported in this driver module.\n", port->portnum);
+ return -ENODEV;
+}
+
+
+long sunix_parport_set_timeout(struct snx_pardevice *dev, long inactivity)
+{
+ long int old = dev->timeout;
+
+ dev->timeout = inactivity;
+
+ if (dev->port->physport->cad == dev) {
+ sunix_parport_ieee1284_wakeup(dev->port);
+ }
+
+ return old;
+}
+
diff --git a/char/snx/snx_ieee1284_ops.c b/char/snx/snx_ieee1284_ops.c
new file mode 100644
index 00000000..527dffbc
--- /dev/null
+++ b/char/snx/snx_ieee1284_ops.c
@@ -0,0 +1,257 @@
+#include "snx_common.h"
+
+
+size_t sunix_parport_ieee1284_write_compat(struct snx_parport *port, const void *buffer, size_t len, int flags)
+{
+ int no_irq = 1;
+ ssize_t count = 0;
+ const unsigned char *addr = buffer;
+ unsigned char byte;
+ struct snx_pardevice *dev = port->physport->cad;
+ unsigned char ctl = (PARPORT_CONTROL_SELECT | PARPORT_CONTROL_INIT);
+
+ if (port->irq != PARPORT_IRQ_NONE) {
+ sunix_parport_enable_irq(port);
+ no_irq = 0;
+ }
+
+ port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
+ sunix_parport_write_control(port, ctl);
+ sunix_parport_data_forward(port);
+
+ while (count < len) {
+ unsigned long expire = jiffies + dev->timeout;
+ long wait = (HZ + 99) / 100;
+ unsigned char mask = (PARPORT_STATUS_ERROR | PARPORT_STATUS_BUSY);
+ unsigned char val = (PARPORT_STATUS_ERROR | PARPORT_STATUS_BUSY);
+
+ do {
+ if (!sunix_parport_wait_peripheral(port, mask, val)) {
+ goto ready;
+ }
+
+ if ((sunix_parport_read_status(port) & (PARPORT_STATUS_PAPEROUT | PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR)) != (PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR)) {
+ goto stop;
+ }
+
+ if (!time_before (jiffies, expire)) {
+ break;
+ }
+
+ if (count && no_irq) {
+ sunix_parport_release(dev);
+
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 13))
+ __set_current_state (TASK_INTERRUPTIBLE);
+ schedule_timeout (wait);
+#else
+ schedule_timeout_interruptible(wait);
+#endif
+ sunix_parport_claim_or_block(dev);
+ } else {
+ sunix_parport_wait_event(port, wait);
+ }
+
+ if (signal_pending (current)) {
+ break;
+ }
+
+ wait *= 2;
+ } while (time_before(jiffies, expire));
+
+ if (signal_pending(current)) {
+ break;
+ }
+
+ break;
+
+ready:
+ byte = *addr++;
+ sunix_parport_write_data(port, byte);
+ udelay (1);
+
+ sunix_parport_write_control(port, ctl | PARPORT_CONTROL_STROBE);
+ udelay (1);
+
+ sunix_parport_write_control(port, ctl);
+ udelay (1);
+
+ count++;
+
+ if (time_before(jiffies, expire)) {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 19))
+ if (!sunix_parport_yield_blocking(dev) && need_resched()) {
+ schedule ();
+ }
+#else
+ if (!sunix_parport_yield_blocking(dev) && current->need_resched) {
+ schedule ();
+ }
+#endif
+ }
+ }
+stop:
+ port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
+
+ return count;
+}
+
+
+size_t sunix_parport_ieee1284_read_nibble(struct snx_parport *port, void *buffer, size_t len, int flags)
+{
+ return 0;
+}
+
+
+size_t sunix_parport_ieee1284_read_byte(struct snx_parport *port, void *buffer, size_t len, int flags)
+{
+ return 0;
+}
+
+
+size_t sunix_parport_ieee1284_ecp_write_data(struct snx_parport *port, const void *buffer, size_t len, int flags)
+{
+ return 0;
+}
+
+
+size_t sunix_parport_ieee1284_ecp_read_data(struct snx_parport *port, void *buffer, size_t len, int flags)
+{
+ return 0;
+}
+
+
+size_t sunix_parport_ieee1284_ecp_write_addr(struct snx_parport *port, const void *buffer, size_t len, int flags)
+{
+ return 0;
+}
+
+
+size_t sunix_parport_ieee1284_epp_write_data(struct snx_parport *port, const void *buffer, size_t len, int flags)
+{
+ unsigned char *bp = (unsigned char *) buffer;
+ size_t ret = 0;
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_STROBE | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_SELECT | PARPORT_CONTROL_INIT,
+ PARPORT_CONTROL_STROBE | PARPORT_CONTROL_INIT);
+
+ port->ops->data_forward(port);
+
+ for (; len > 0; len--, bp++) {
+ sunix_parport_write_data(port, *bp);
+ sunix_parport_frob_control(port, PARPORT_CONTROL_AUTOFD, PARPORT_CONTROL_AUTOFD);
+
+ if (sunix_parport_poll_peripheral(port, PARPORT_STATUS_BUSY, 0, 10)) {
+ break;
+ }
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_AUTOFD, 0);
+
+ if (sunix_parport_poll_peripheral(port, PARPORT_STATUS_BUSY, PARPORT_STATUS_BUSY, 5)) {
+ break;
+ }
+
+ ret++;
+ }
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_STROBE, 0);
+ return ret;
+}
+
+
+size_t sunix_parport_ieee1284_epp_read_data(struct snx_parport *port, void *buffer, size_t len, int flags)
+{
+ unsigned char *bp = (unsigned char *) buffer;
+ unsigned ret = 0;
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_STROBE | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_SELECT | PARPORT_CONTROL_INIT,
+ PARPORT_CONTROL_INIT);
+
+ port->ops->data_reverse(port);
+
+ for (; len > 0; len--, bp++) {
+ sunix_parport_frob_control(port, PARPORT_CONTROL_AUTOFD, PARPORT_CONTROL_AUTOFD);
+
+ if (sunix_parport_wait_peripheral(port, PARPORT_STATUS_BUSY, 0)) {
+ break;
+ }
+
+ *bp = sunix_parport_read_data(port);
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_AUTOFD, 0);
+
+ if (sunix_parport_poll_peripheral(port, PARPORT_STATUS_BUSY, PARPORT_STATUS_BUSY, 5)) {
+ break;
+ }
+
+ ret++;
+ }
+ port->ops->data_forward(port);
+ return ret;
+}
+
+
+size_t sunix_parport_ieee1284_epp_write_addr(struct snx_parport *port, const void *buffer, size_t len, int flags)
+{
+ unsigned char *bp = (unsigned char *)buffer;
+ size_t ret = 0;
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_STROBE | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_SELECT | PARPORT_CONTROL_INIT,
+ PARPORT_CONTROL_STROBE | PARPORT_CONTROL_INIT);
+
+ port->ops->data_forward(port);
+
+ for (; len > 0; len--, bp++) {
+ sunix_parport_write_data(port, *bp);
+ sunix_parport_frob_control(port, PARPORT_CONTROL_SELECT, PARPORT_CONTROL_SELECT);
+
+ if (sunix_parport_poll_peripheral(port, PARPORT_STATUS_BUSY, 0, 10)) {
+ break;
+ }
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_SELECT, 0);
+
+ if (sunix_parport_poll_peripheral(port, PARPORT_STATUS_BUSY, PARPORT_STATUS_BUSY, 5)) {
+ break;
+ }
+
+ ret++;
+ }
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_STROBE, 0);
+ return ret;
+}
+
+
+size_t sunix_parport_ieee1284_epp_read_addr(struct snx_parport *port, void *buffer, size_t len, int flags)
+{
+ unsigned char *bp = (unsigned char *) buffer;
+ unsigned ret = 0;
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_STROBE | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_SELECT | PARPORT_CONTROL_INIT,
+ PARPORT_CONTROL_INIT);
+
+ port->ops->data_reverse(port);
+
+ for (; len > 0; len--, bp++) {
+ sunix_parport_frob_control(port, PARPORT_CONTROL_SELECT, PARPORT_CONTROL_SELECT);
+
+ if (sunix_parport_wait_peripheral(port, PARPORT_STATUS_BUSY, 0)) {
+ break;
+ }
+
+ *bp = sunix_parport_read_data(port);
+
+ sunix_parport_frob_control(port, PARPORT_CONTROL_SELECT, PARPORT_CONTROL_SELECT);
+
+ if (sunix_parport_poll_peripheral(port, PARPORT_STATUS_BUSY, PARPORT_STATUS_BUSY, 5)) {
+ break;
+ }
+
+ ret++;
+ }
+
+ port->ops->data_forward(port);
+ return ret;
+}
+
diff --git a/char/snx/snx_lp.c b/char/snx/snx_lp.c
new file mode 100644
index 00000000..ecbee621
--- /dev/null
+++ b/char/snx/snx_lp.c
@@ -0,0 +1,1019 @@
+#include "snx_common.h"
+#include "snx_lp.h"
+
+
+#undef SNX_LP_STATS
+
+static int SNX_PAL_MAJOR ;
+
+#define SNX_LP_NO SNX_PAR_TOTAL_MAX
+//#define SNX_CONFIG_LP_CONSOLE
+#undef SNX_CONFIG_LP_CONSOLE
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+static devfs_handle_t snx_devfs_handle;
+#endif
+
+static struct snx_lp_struct snx_lp_table[SNX_LP_NO];
+
+static unsigned int snx_lp_count;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static struct class *snx_lp_class;
+#else
+#endif
+
+#ifdef SNX_CONFIG_LP_CONSOLE
+static struct snx_parport *console_registered;
+#endif
+
+
+#define SNX_LP_PREEMPT_REQUEST 1
+#define SNX_LP_PARPORT_CLAIMED 2
+
+
+#define r_dtr(x) (sunix_parport_read_data(snx_lp_table[(x)].dev->port))
+#define r_str(x) (sunix_parport_read_status(snx_lp_table[(x)].dev->port))
+#define w_ctr(x, y) do { sunix_parport_write_control(snx_lp_table[(x)].dev->port, (y)); } while (0)
+#define w_dtr(x, y) do { sunix_parport_write_data(snx_lp_table[(x)].dev->port, (y)); } while (0)
+
+
+
+static void snx_lp_claim_parport_or_block(struct snx_lp_struct *this_lp)
+{
+ if (!test_and_set_bit(SNX_LP_PARPORT_CLAIMED, &this_lp->bits)) {
+ sunix_parport_claim_or_block(this_lp->dev);
+ }
+}
+
+
+static void snx_lp_release_parport(struct snx_lp_struct *this_lp)
+{
+ if (test_and_clear_bit(SNX_LP_PARPORT_CLAIMED, &this_lp->bits)) {
+ sunix_parport_release(this_lp->dev);
+ }
+}
+
+
+static int snx_lp_preempt(void *handle)
+{
+ struct snx_lp_struct *this_lp = (struct snx_lp_struct *)handle;
+ set_bit(SNX_LP_PREEMPT_REQUEST, &this_lp->bits);
+ return 1;
+}
+
+
+static int snx_lp_negotiate(struct snx_parport *port, int mode)
+{
+ if (sunix_parport_negotiate(port, mode) != 0) {
+ mode = IEEE1284_MODE_COMPAT;
+ sunix_parport_negotiate(port, mode);
+ }
+ return (mode);
+}
+
+
+static int snx_lp_reset(int minor)
+{
+ int retval;
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+
+ w_ctr(minor, SNX_LP_PSELECP);
+
+ udelay(SNX_LP_DELAY);
+
+ w_ctr(minor, SNX_LP_PSELECP | SNX_LP_PINITP);
+
+ retval = r_str(minor);
+
+ snx_lp_release_parport(&snx_lp_table[minor]);
+ return retval;
+}
+
+
+static void snx_lp_error(int minor)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ DEFINE_WAIT(wait);
+#endif
+ int polling;
+
+ if (SNX_LP_F(minor) & SNX_LP_ABORT) {
+ return;
+ }
+
+ polling = snx_lp_table[minor].dev->port->irq == PARPORT_IRQ_NONE;
+
+ if (polling) {
+ snx_lp_release_parport(&snx_lp_table[minor]);
+ }
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ prepare_to_wait(&snx_lp_table[minor].waitq, &wait, TASK_INTERRUPTIBLE);
+
+ schedule_timeout(SNX_LP_TIMEOUT_POLLED);
+ finish_wait(&snx_lp_table[minor].waitq, &wait);
+#else
+ interruptible_sleep_on_timeout(&snx_lp_table[minor].waitq, SNX_LP_TIMEOUT_POLLED);
+#endif
+
+ if (polling) {
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+ } else {
+ sunix_parport_yield_blocking(snx_lp_table[minor].dev);
+ }
+}
+
+
+static int snx_lp_check_status(int minor)
+{
+ int error = 0;
+ unsigned int last = snx_lp_table[minor].last_error;
+ unsigned char status = r_str(minor);
+
+ if ((status & SNX_LP_PERRORP) && !(SNX_LP_F(minor) & SNX_LP_CAREFUL)) {
+ last = 0;
+ } else if ((status & SNX_LP_POUTPA)) {
+ if (last != SNX_LP_POUTPA) {
+ last = SNX_LP_POUTPA;
+ printk("SNX Info : lp%d port out of paper.\n", minor);
+ }
+ error = -ENOSPC;
+ } else if (!(status & SNX_LP_PSELECD)) {
+ if (last != SNX_LP_PSELECD) {
+ last = SNX_LP_PSELECD;
+ printk("SNX Info : lp%d port off-line.\n", minor);
+ }
+ error = -EIO;
+ } else if (!(status & SNX_LP_PERRORP)) {
+ if (last != SNX_LP_PERRORP) {
+ last = SNX_LP_PERRORP;
+ printk("SNX Info : lp%d port on fire.\n", minor);
+ }
+ error = -EIO;
+ } else {
+ last = 0;
+ }
+
+ snx_lp_table[minor].last_error = last;
+
+ if (last != 0) {
+ snx_lp_error(minor);
+ }
+ return error;
+}
+
+
+static int snx_lp_wait_ready(int minor, int nonblock)
+{
+ int error = 0;
+
+ if (snx_lp_table[minor].current_mode != IEEE1284_MODE_COMPAT) {
+ return 0;
+ }
+
+ do {
+ error = snx_lp_check_status(minor);
+
+ if (error && (nonblock || (SNX_LP_F(minor) & SNX_LP_ABORT))) {
+ break;
+ }
+
+ if (signal_pending(current)) {
+ error = -EINTR;
+ break;
+ }
+ } while (error);
+
+ return error;
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+static ssize_t snx_lp_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+#else
+static ssize_t snx_lp_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
+#endif
+{
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 19))
+ unsigned int minor = iminor(file->f_path.dentry->d_inode);
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(file->f_dentry->d_inode);
+#else
+ unsigned int minor = MINOR (file->f_dentry->d_inode->i_rdev);
+#endif
+
+
+ struct snx_parport *port = snx_lp_table[minor].dev->port;
+ char *kbuf = snx_lp_table[minor].lp_buffer;
+
+ ssize_t retv = 0;
+ ssize_t written;
+ size_t copy_size = count;
+ int nonblock = ((file->f_flags & O_NONBLOCK) || (SNX_LP_F(minor) & SNX_LP_ABORT));
+
+
+#ifdef SNX_LP_STATS
+ if (time_after(jiffies, snx_lp_table[minor].lastcall + SNX_LP_TIME(minor))) {
+ snx_lp_table[minor].runchars = 0;
+ }
+
+ snx_lp_table[minor].lastcall = jiffies;
+#endif
+
+ if (copy_size > SNX_LP_BUFFER_SIZE) {
+ copy_size = SNX_LP_BUFFER_SIZE;
+ }
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24))
+ if (down_interruptible(&snx_lp_table[minor].port_mutex))
+#else
+ if (mutex_lock_interruptible(&snx_lp_table[minor].port_mutex))
+#endif
+ {
+ return -EINTR;
+ }
+
+ if (copy_from_user(kbuf, buf, copy_size)) {
+ retv = -EFAULT;
+ goto out_unlock;
+ }
+
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+
+ snx_lp_table[minor].current_mode = snx_lp_negotiate(port, snx_lp_table[minor].best_mode);
+
+ sunix_parport_set_timeout(snx_lp_table[minor].dev, (nonblock ? SNX_PARPORT_INACTIVITY_O_NONBLOCK : snx_lp_table[minor].timeout));
+
+ retv = snx_lp_wait_ready(minor, nonblock);
+
+ //if ((retv = snx_lp_wait_ready(minor, nonblock)) == 0)
+
+ do {
+ written = sunix_parport_write(port, kbuf, copy_size);
+ if (written > 0) {
+ copy_size -= written;
+ count -= written;
+ buf += written;
+ retv += written;
+ }
+
+ if (signal_pending(current)) {
+ if (retv == 0) {
+ retv = -EINTR;
+ }
+ break;
+ }
+
+ if (copy_size > 0) {
+ int error;
+
+ sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
+ snx_lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
+
+ error = snx_lp_wait_ready(minor, nonblock);
+
+ if (error) {
+ if (retv == 0) {
+ retv = error;
+ }
+ break;
+ } else if (nonblock) {
+ if (retv == 0) {
+ retv = -EAGAIN;
+ }
+ break;
+ }
+
+ sunix_parport_yield_blocking(snx_lp_table[minor].dev);
+ snx_lp_table[minor].current_mode = snx_lp_negotiate(port, snx_lp_table[minor].best_mode);
+
+ }
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 19))
+ else if (need_resched()) {
+ schedule ();
+ }
+#else
+ else if (current->need_resched) {
+ schedule ();
+ }
+#endif
+
+ if (count) {
+ copy_size = count;
+ if (copy_size > SNX_LP_BUFFER_SIZE) {
+ copy_size = SNX_LP_BUFFER_SIZE;
+ }
+
+ if (copy_from_user(kbuf, buf, copy_size)) {
+ if (retv == 0) {
+ retv = -EFAULT;
+ }
+ break;
+ }
+ }
+ } while (count > 0);
+
+ if (test_and_clear_bit(SNX_LP_PREEMPT_REQUEST, &snx_lp_table[minor].bits)) {
+ printk("SNX Info : lp%d releasing parport.\n", minor);
+ sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
+
+ snx_lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
+
+ snx_lp_release_parport(&snx_lp_table[minor]);
+ }
+
+out_unlock:
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24))
+ up(&snx_lp_table[minor].port_mutex);
+#else
+ mutex_unlock(&snx_lp_table[minor].port_mutex);
+#endif
+ return retv;
+}
+
+
+#ifdef SNX_CONFIG_PARPORT_1284
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+static ssize_t snx_lp_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+#else
+static ssize_t snx_lp_read(struct file *file, char *buf, size_t count, loff_t *ppos)
+#endif
+{
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 19))
+ unsigned int minor = iminor(file->f_path.dentry->d_inode);
+ DEFINE_WAIT(wait);
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(file->f_dentry->d_inode);
+ DEFINE_WAIT(wait);
+#else
+ unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);
+#endif
+
+ struct snx_parport *port = snx_lp_table[minor].dev->port;
+ ssize_t retval = 0;
+ char *kbuf = snx_lp_table[minor].lp_buffer;
+ int nonblock = ((file->f_flags & O_NONBLOCK) || (SNX_LP_F(minor) & SNX_LP_ABORT));
+
+ if (count > SNX_LP_BUFFER_SIZE) {
+ count = SNX_LP_BUFFER_SIZE;
+ }
+
+ if (down_interruptible(&snx_lp_table[minor].port_mutex)) {
+ return -EINTR;
+ }
+
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+
+ sunix_parport_set_timeout(snx_lp_table[minor].dev, (nonblock ? PARPORT_INACTIVITY_O_NONBLOCK : snx_lp_table[minor].timeout));
+
+ sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
+
+ if (sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_NIBBLE)) {
+ retval = -EIO;
+ goto out;
+ }
+
+ while (retval == 0) {
+ retval = sunix_parport_read(port, kbuf, count);
+
+ if (retval > 0) {
+ break;
+ }
+
+ if (nonblock) {
+ retval = -EAGAIN;
+ break;
+ }
+
+ if (snx_lp_table[minor].dev->port->irq == PARPORT_IRQ_NONE) {
+ sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
+ snx_lp_error(minor);
+
+ if (sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_NIBBLE)) {
+ retval = -EIO;
+ goto out;
+ }
+ } else {
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ prepare_to_wait(&snx_lp_table[minor].waitq, &wait, TASK_INTERRUPTIBLE);
+ schedule_timeout(SNX_LP_TIMEOUT_POLLED);
+ finish_wait(&snx_lp_table[minor].waitq, &wait);
+#else
+ interruptible_sleep_on_timeout(&snx_lp_table[minor].waitq, SNX_LP_TIMEOUT_POLLED);
+#endif
+ }
+
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ cond_resched();
+#else
+ if (current->need_resched) {
+ schedule();
+ }
+#endif
+ }
+
+ sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
+
+out:
+ snx_lp_release_parport(&snx_lp_table[minor]);
+
+ if (retval > 0 && copy_to_user(buf, kbuf, retval)) {
+ retval = -EFAULT;
+ }
+
+ up(&snx_lp_table[minor].port_mutex);
+
+ return retval;
+}
+#endif
+
+
+static int snx_lp_open(struct inode *inode, struct file *file)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(inode);
+#else
+ unsigned int minor = MINOR(inode->i_rdev);
+#endif
+
+ if (minor >= SNX_LP_NO) {
+ return -ENXIO;
+ }
+
+ if ((SNX_LP_F(minor) & SNX_LP_EXIST) == 0) {
+ return -ENXIO;
+ }
+
+ if (test_and_set_bit(SNX_LP_BUSY_BIT_POS, &SNX_LP_F(minor))) {
+ return -EBUSY;
+ }
+
+ if ((SNX_LP_F(minor) & SNX_LP_ABORTOPEN) && !(file->f_flags & O_NONBLOCK)) {
+ int status;
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+ status = r_str(minor);
+ snx_lp_release_parport(&snx_lp_table[minor]);
+
+ if (status & SNX_LP_POUTPA) {
+ printk("SNX Error: lp%d out of paper.\n", minor);
+ SNX_LP_F(minor) &= ~SNX_LP_BUSY;
+ return -ENOSPC;
+ } else if (!(status & SNX_LP_PSELECD)) {
+ printk("SNX Error: lp%d off-line.\n", minor);
+ SNX_LP_F(minor) &= ~SNX_LP_BUSY;
+ return -EIO;
+ } else if (!(status & SNX_LP_PERRORP)) {
+ printk("SNX Error: lp%d printer error.\n", minor);
+ SNX_LP_F(minor) &= ~SNX_LP_BUSY;
+ return -EIO;
+ }
+ }
+
+ snx_lp_table[minor].lp_buffer = kmalloc(SNX_LP_BUFFER_SIZE, GFP_KERNEL);
+
+ if (!snx_lp_table[minor].lp_buffer) {
+ SNX_LP_F(minor) &= ~SNX_LP_BUSY;
+ return -ENOMEM;
+ }
+
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+
+ if ((snx_lp_table[minor].dev->port->modes & PARPORT_MODE_ECP) && !sunix_parport_negotiate (snx_lp_table[minor].dev->port, IEEE1284_MODE_ECP)) {
+ printk("SNX Info : lp%d ECP mode.\n", minor);
+ snx_lp_table[minor].best_mode = IEEE1284_MODE_ECP;
+ } else {
+ snx_lp_table[minor].best_mode = IEEE1284_MODE_COMPAT;
+ }
+
+ sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
+
+ snx_lp_release_parport(&snx_lp_table[minor]);
+ snx_lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ try_module_get(THIS_MODULE);
+#else
+ MOD_INC_USE_COUNT;
+#endif
+
+ return 0;
+}
+
+
+static int snx_lp_release(struct inode *inode, struct file *file)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(inode);
+#else
+ unsigned int minor = MINOR(inode->i_rdev);
+#endif
+
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+ sunix_parport_negotiate(snx_lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
+
+ snx_lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
+ snx_lp_release_parport(&snx_lp_table[minor]);
+ kfree(snx_lp_table[minor].lp_buffer);
+ snx_lp_table[minor].lp_buffer = NULL;
+ SNX_LP_F(minor) &= ~SNX_LP_BUSY;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ module_put(THIS_MODULE);
+#else
+ MOD_DEC_USE_COUNT;
+#endif
+
+ return 0;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+static int snx_lp_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(inode);
+#else
+ unsigned int minor = MINOR(inode->i_rdev);
+#endif
+
+ int status;
+ int retval = 0;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ void __user *argp = (void __user *)arg;
+#endif
+
+
+ if (minor >= SNX_LP_NO) {
+ return -ENODEV;
+ }
+
+ if ((SNX_LP_F(minor) & SNX_LP_EXIST) == 0) {
+ return -ENODEV;
+ }
+
+ switch (cmd) {
+ struct timeval par_timeout;
+ long to_jiffies;
+
+ case SNX_LPTIME:
+ SNX_LP_TIME(minor) = arg * HZ/100;
+ break;
+
+
+ case SNX_LPCHAR:
+ SNX_LP_CHAR(minor) = arg;
+ break;
+
+
+ case SNX_LPABORT:
+ if (arg) {
+ SNX_LP_F(minor) |= SNX_LP_ABORT;
+ } else {
+ SNX_LP_F(minor) &= ~SNX_LP_ABORT;
+ }
+ break;
+
+
+ case SNX_LPABORTOPEN:
+ if (arg) {
+ SNX_LP_F(minor) |= SNX_LP_ABORTOPEN;
+ } else {
+ SNX_LP_F(minor) &= ~SNX_LP_ABORTOPEN;
+ }
+ break;
+
+
+ case SNX_LPCAREFUL:
+ if (arg) {
+ SNX_LP_F(minor) |= SNX_LP_CAREFUL;
+ } else {
+ SNX_LP_F(minor) &= ~SNX_LP_CAREFUL;
+ }
+ break;
+
+ case SNX_LPWAIT:
+ SNX_LP_WAIT(minor) = arg;
+ break;
+
+
+ case SNX_LPSETIRQ:
+ return -EINVAL;
+ break;
+
+
+ case SNX_LPGETIRQ:
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &SNX_LP_IRQ(minor), sizeof(int)))
+#else
+ if (copy_to_user((int *) arg, &SNX_LP_IRQ(minor), sizeof(int)))
+#endif
+ {
+ return -EFAULT;
+ }
+ break;
+
+
+ case SNX_LPGETSTATUS:
+ snx_lp_claim_parport_or_block(&snx_lp_table[minor]);
+ status = r_str(minor);
+ snx_lp_release_parport(&snx_lp_table[minor]);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &status, sizeof(int)))
+#else
+ if (copy_to_user((int *) arg, &status, sizeof(int)))
+#endif
+ {
+ return -EFAULT;
+ }
+ break;
+
+
+ case SNX_LPRESET:
+ snx_lp_reset(minor);
+ break;
+
+
+#ifdef SNX_LP_STATS
+ case SNX_LPGETSTATS:
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &SNX_LP_STAT(minor), sizeof(struct snx_lp_stats)))
+#else
+ if (copy_to_user((int *) arg, &SNX_LP_STAT(minor), sizeof(struct snx_lp_stats)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ if (capable(CAP_SYS_ADMIN)) {
+ memset(&SNX_LP_STAT(minor), 0, sizeof(struct snx_lp_stats));
+ }
+ break;
+#endif
+
+
+ case SNX_LPGETFLAGS:
+ status = SNX_LP_F(minor);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &status, sizeof(int)))
+#else
+ if (copy_to_user((int *) arg, &status, sizeof(int)))
+#endif
+ {
+ return -EFAULT;
+ }
+ break;
+
+
+ case SNX_LPSETTIMEOUT:
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&par_timeout, argp, sizeof (struct timeval)))
+#else
+ if (copy_from_user(&par_timeout, (struct timeval *) arg, sizeof (struct timeval)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ if ((par_timeout.tv_sec < 0) || (par_timeout.tv_usec < 0)) {
+ return -EINVAL;
+ }
+
+ to_jiffies = SNX_ROUND_UP(par_timeout.tv_usec, 1000000/HZ);
+ to_jiffies += par_timeout.tv_sec * (long) HZ;
+ if (to_jiffies <= 0) {
+ return -EINVAL;
+ }
+ snx_lp_table[minor].timeout = to_jiffies;
+ break;
+
+
+ default:
+ retval = -EINVAL;
+ }
+
+ return retval;
+}
+#endif
+
+static struct file_operations snx_lp_fops = {
+ .owner = THIS_MODULE,
+ .write = snx_lp_write,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+ .ioctl = snx_lp_ioctl,
+#endif
+ .open = snx_lp_open,
+ .release = snx_lp_release,
+#ifdef SNX_CONFIG_PARPORT_1284
+ .read = snx_lp_read,
+#endif
+};
+
+
+#ifdef SNX_CONFIG_LP_CONSOLE
+#define SNX_CONSOLE_LP 0
+
+#define SNX_CONSOLE_LP_STRICT 1
+
+static void snx_lp_console_write(struct console *co, const char *s, unsigned count)
+{
+ struct snx_pardevice *dev = snx_lp_table[SNX_CONSOLE_LP].dev;
+ struct snx_parport *port = dev->port;
+ ssize_t written;
+
+ if (sunix_parport_claim(dev)) {
+ return;
+ }
+
+ sunix_parport_set_timeout(dev, 0);
+
+ sunix_parport_negotiate(port, IEEE1284_MODE_COMPAT);
+
+ do {
+ ssize_t canwrite = count;
+ char *lf = memchr(s, '\n', count);
+
+ if (lf) {
+ canwrite = lf - s;
+ }
+
+ if (canwrite > 0) {
+ written = sunix_parport_write(port, s, canwrite);
+
+ if (written <= 0) {
+ continue;
+ }
+
+ s += written;
+ count -= written;
+ canwrite -= written;
+ }
+
+ if (lf && canwrite <= 0) {
+ const char *crlf = "\r\n";
+ int i = 2;
+
+ s++;
+ count--;
+ do {
+ written = sunix_parport_write(port, crlf, i);
+ if (written > 0) {
+ i -= written, crlf += written;
+ }
+ } while (i > 0 && (SNX_CONSOLE_LP_STRICT || written > 0));
+ }
+ } while (count > 0 && (SNX_CONSOLE_LP_STRICT || written > 0));
+
+ sunix_parport_release(dev);
+}
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+static struct console snx_lpcons = {
+ .name = "lx",
+ .write = snx_lp_console_write,
+ .flags = CON_PRINTBUFFER,
+};
+#else
+static kdev_t snx_lp_console_device(struct console *c)
+{
+ return MKDEV(SNX_PAL_MAJOR, SNX_CONSOLE_LP);
+}
+
+static struct console snx_lpcons = {
+ name: "lx",
+ write : snx_lp_console_write,
+ device : snx_lp_console_device,
+ flags : CON_PRINTBUFFER,
+};
+#endif
+#endif
+
+
+static int snx_parport_nr[SNX_LP_NO] = {0, 1, 2, 3};
+static int reset;
+
+
+static int snx_lp_register(int nr, struct snx_parport *port)
+{
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ char name[8];
+#endif
+
+ snx_lp_table[nr].dev = sunix_parport_register_device(port, "lx", snx_lp_preempt, NULL, NULL, 0, (void *) &snx_lp_table[nr]);
+
+ if (snx_lp_table[nr].dev == NULL) {
+ return 1;
+ }
+
+ snx_lp_table[nr].flags |= SNX_LP_EXIST;
+
+ if (reset) {
+ snx_lp_reset(nr);
+ }
+
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ sprintf(name, "%d", nr);
+ devfs_register(snx_devfs_handle, name, DEVFS_FL_DEFAULT, SNX_PAL_MAJOR, nr, S_IFCHR | S_IRUGO | S_IWUGO, &snx_lp_fops, NULL);
+
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17))
+ devfs_mk_cdev(MKDEV(SNX_PAL_MAJOR, nr), S_IFCHR | S_IRUGO | S_IWUGO, "printer/%d", nr);
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 23))
+ class_device_create(snx_lp_class, NULL, MKDEV(SNX_PAL_MAJOR, nr), NULL, "lp%d", nr);
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 26))
+ device_create(snx_lp_class, NULL, MKDEV(SNX_PAL_MAJOR, nr), "lp%d", nr);
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 27))
+ device_create_drvdata(snx_lp_class, NULL, MKDEV(SNX_PAL_MAJOR, nr), NULL, "lp%d", nr);
+#else
+ device_create(snx_lp_class, NULL, MKDEV(SNX_PAL_MAJOR, nr), NULL, "lp%d", nr);
+#endif
+
+ printk("SNX Info : lp%d port using %s (%s).\n", nr, port->name, (port->irq == PARPORT_IRQ_NONE)?"polling":"interrupt-driven");
+
+#ifdef SNX_CONFIG_LP_CONSOLE
+
+ if (!nr) {
+ if (port->modes & PARPORT_MODE_SAFEININT) {
+ register_console(&snx_lpcons);
+ console_registered = port;
+ printk("SNX Info : lp%d port console ready.\n", SNX_CONSOLE_LP);
+ } else {
+ printk("SNX Info : lp%d port cannot run console on %s.\n", SNX_CONSOLE_LP, port->name);
+ }
+ }
+#endif
+ return 0;
+}
+
+
+static void snx_lp_attach(struct snx_parport *port)
+{
+ unsigned int i;
+
+ for (i = 0; i < SNX_LP_NO; i++) {
+ if (port->number == snx_parport_nr[i]) {
+ if (!snx_lp_register(i, port)) {
+ snx_lp_count++;
+ }
+ break;
+ }
+ }
+}
+
+
+static void snx_lp_detach(struct snx_parport *port)
+{
+#ifdef SNX_CONFIG_LP_CONSOLE
+ if (console_registered == port) {
+ unregister_console (&snx_lpcons);
+ console_registered = NULL;
+ }
+
+#endif
+}
+
+
+static struct snx_parport_driver snx_lp_driver = {
+ .name = "lx",
+ .attach = snx_lp_attach,
+ .detach = snx_lp_detach,
+};
+
+
+static int snx_lp_init(void)
+{
+ int i, err = 0;
+
+ for (i = 0; i < SNX_LP_NO; i++) {
+ snx_lp_table[i].dev = NULL;
+ snx_lp_table[i].flags = 0;
+ snx_lp_table[i].chars = SNX_LP_INIT_CHAR;
+ snx_lp_table[i].time = SNX_LP_INIT_TIME;
+ snx_lp_table[i].wait = SNX_LP_INIT_WAIT;
+ snx_lp_table[i].lp_buffer = NULL;
+
+#ifdef SNX_LP_STATS
+ snx_lp_table[i].lastcall = 0;
+ snx_lp_table[i].runchars = 0;
+ memset(&snx_lp_table[i].stats, 0, sizeof (struct snx_lp_stats));
+#endif
+ snx_lp_table[i].last_error = 0;
+ init_waitqueue_head (&snx_lp_table[i].waitq);
+ init_waitqueue_head (&snx_lp_table[i].dataq);
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24))
+ init_MUTEX(&snx_lp_table[i].port_mutex);
+#else
+ mutex_init(&snx_lp_table[i].port_mutex);
+#endif
+ snx_lp_table[i].timeout = 10 * HZ;
+ }
+
+ SNX_PAL_MAJOR = register_chrdev(0, "lx", &snx_lp_fops);
+
+ if (SNX_PAL_MAJOR < 0) {
+ printk("SNX Error: lp unable to get major \n");
+ return -EIO;
+ }
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ snx_devfs_handle = devfs_mk_dir(NULL, "sprinter", NULL);
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17))
+ devfs_mk_dir("sprinter");
+#else
+ snx_lp_class = class_create(THIS_MODULE, "sprinter");
+
+ if (IS_ERR(snx_lp_class)) {
+ err = PTR_ERR(snx_lp_class);
+ goto out_reg;
+ }
+#endif
+
+ if (sunix_parport_register_driver(&snx_lp_driver)) {
+ printk("SNX Error: lp unable to register with parport.\n");
+ err = -EIO;
+ goto out_class;
+ }
+
+ if (!snx_lp_count) {
+ printk("SNX Warng: lp driver loaded but no devices found.\n");
+ }
+
+ return 0;
+
+out_class:
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17))
+ devfs_remove("sprinter");
+#else
+ class_destroy(snx_lp_class);
+
+out_reg:
+#endif
+
+ unregister_chrdev(SNX_PAL_MAJOR, "lx");
+ return err;
+}
+
+
+int sunix_par_lp_init(void)
+{
+ int status = 0;
+ status = snx_lp_init();
+ return status;
+}
+
+
+void sunix_par_lp_exit(void)
+{
+ unsigned int offset;
+ sunix_parport_unregister_driver(&snx_lp_driver);
+
+#ifdef SNX_CONFIG_LP_CONSOLE
+ unregister_console(&snx_lpcons);
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ devfs_unregister(snx_devfs_handle);
+#endif
+
+ unregister_chrdev(SNX_PAL_MAJOR, "lx");
+
+
+ for (offset = 0; offset < SNX_LP_NO; offset++) {
+ if (snx_lp_table[offset].dev == NULL) {
+ continue;
+ }
+
+ sunix_parport_unregister_device(snx_lp_table[offset].dev);
+
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17))
+
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 23))
+ class_device_destroy(snx_lp_class, MKDEV(SNX_PAL_MAJOR, offset));
+#else
+ device_destroy(snx_lp_class, MKDEV(SNX_PAL_MAJOR, offset));
+#endif
+ }
+
+
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 0))
+
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17))
+ devfs_remove("sprinter");
+#else
+ class_destroy(snx_lp_class);
+#endif
+}
+
diff --git a/char/snx/snx_parallel.c b/char/snx/snx_parallel.c
new file mode 100644
index 00000000..174c309d
--- /dev/null
+++ b/char/snx/snx_parallel.c
@@ -0,0 +1,437 @@
+
+#include "snx_common.h"
+
+static LIST_HEAD(snx_ports_list);
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static DEFINE_SPINLOCK(snx_ports_lock);
+#else
+static spinlock_t snx_ports_lock = SPIN_LOCK_UNLOCKED;
+#endif
+static void sunix_frob_econtrol(struct snx_parport *, unsigned char, unsigned char);
+
+// 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) sunix_frob_econtrol((p), 0xff, (v))
+
+
+static void sunix_frob_econtrol(struct snx_parport *pb, unsigned char m, unsigned char v)
+{
+ unsigned char ectr = 0;
+
+ if (m != 0xff) {
+ ectr = inb(SNX_ECR (pb));
+ }
+
+ outb((ectr & ~m) ^ v, SNX_ECR (pb));
+}
+
+
+static __inline__ void sunix_frob_set_mode(struct snx_parport *p, int mode)
+{
+ sunix_frob_econtrol(p, ECR_MODE_MASK, mode << 5);
+}
+
+
+static int sunix_clear_epp_timeout(struct snx_parport *pb)
+{
+ unsigned char dsr;
+ dsr = sunix_parport_pc_read_status(pb);
+
+ if (!(dsr & 0x01)) {
+ return 1;
+ }
+
+ sunix_parport_pc_read_status(pb);
+ dsr = sunix_parport_pc_read_status(pb);
+
+ outb(dsr | 0x01, SNX_DSR (pb));
+ outb(dsr & 0xfe, SNX_DSR (pb));
+
+ dsr = sunix_parport_pc_read_status(pb);
+
+ return !(dsr & 0x01);
+}
+
+
+static void sunix_parport_pc_init_state(struct snx_pardevice *dev, struct snx_parport_state *s)
+{
+ s->u.pc.ctr = 0xc;
+ if (dev->irq_func && dev->port->irq != PARPORT_IRQ_NONE) {
+ s->u.pc.ctr |= 0x10;
+ }
+
+ s->u.pc.ecr = 0x34;
+}
+
+
+static void sunix_parport_pc_save_state(struct snx_parport *p, struct snx_parport_state *s)
+{
+ const struct sunix_par_port *priv = p->physport->private_data;
+
+ s->u.pc.ctr = priv->ctr;
+
+ if (priv->ecr) {
+ s->u.pc.ecr = inb(SNX_ECR (p));
+ }
+}
+
+
+static void sunix_parport_pc_restore_state(struct snx_parport *p, struct snx_parport_state *s)
+{
+ struct sunix_par_port *priv = p->physport->private_data;
+ register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
+
+ outb(c, SNX_DCR (p));
+ priv->ctr = c;
+
+ if (priv->ecr) {
+ ECR_WRITE(p, s->u.pc.ecr);
+ }
+}
+
+
+static const struct snx_parport_ops sunix_parport_pc_ops = {
+ .write_data = sunix_parport_pc_write_data,
+ .read_data = sunix_parport_pc_read_data,
+ .write_control = sunix_parport_pc_write_control,
+ .read_control = sunix_parport_pc_read_control,
+ .frob_control = sunix_parport_pc_frob_control,
+ .read_status = sunix_parport_pc_read_status,
+ .enable_irq = sunix_parport_pc_enable_irq,
+ .disable_irq = sunix_parport_pc_disable_irq,
+ .data_forward = sunix_parport_pc_data_forward,
+ .data_reverse = sunix_parport_pc_data_reverse,
+ .init_state = sunix_parport_pc_init_state,
+ .save_state = sunix_parport_pc_save_state,
+ .restore_state = sunix_parport_pc_restore_state,
+ .epp_write_data = sunix_parport_ieee1284_epp_write_data,
+ .epp_read_data = sunix_parport_ieee1284_epp_read_data,
+ .epp_write_addr = sunix_parport_ieee1284_epp_write_addr,
+ .epp_read_addr = sunix_parport_ieee1284_epp_read_addr,
+ .ecp_write_data = sunix_parport_ieee1284_ecp_write_data,
+ .ecp_read_data = sunix_parport_ieee1284_ecp_read_data,
+ .ecp_write_addr = sunix_parport_ieee1284_ecp_write_addr,
+ .compat_write_data = sunix_parport_ieee1284_write_compat,
+ .nibble_read_data = sunix_parport_ieee1284_read_nibble,
+ .byte_read_data = sunix_parport_ieee1284_read_byte,
+ .owner = THIS_MODULE,
+};
+
+
+static int sunix_parport_SPP_supported(struct snx_parport *pb)
+{
+ unsigned char dcr, w;
+
+ sunix_clear_epp_timeout(pb);
+
+ w = 0xc;
+ outb(w, SNX_DCR (pb));
+
+ dcr = inb(SNX_DCR (pb));
+
+ if ((dcr & 0xf) == w) {
+ w = 0xe;
+ outb(w, SNX_DCR (pb));
+ dcr = inb (SNX_DCR (pb));
+ outb(0xc, SNX_DCR (pb));
+
+ if ((dcr & 0xf) == w) {
+ return PARPORT_MODE_PCSPP;
+ }
+ }
+
+ w = 0xaa;
+ sunix_parport_pc_write_data(pb, w);
+
+ dcr = sunix_parport_pc_read_data(pb);
+
+ if (dcr == w) {
+ w = 0x55;
+ sunix_parport_pc_write_data(pb, w);
+ dcr = sunix_parport_pc_read_data(pb);
+
+ if (dcr == w) {
+ return PARPORT_MODE_PCSPP;
+ }
+ }
+
+ return 0;
+}
+
+
+static int sunix_parport_ECR_present(struct snx_parport *pb)
+{
+ struct sunix_par_port *priv = pb->private_data;
+ unsigned char r = 0xc;
+
+ outb(r, SNX_DCR (pb));
+
+ if ((inb(SNX_ECR (pb)) & 0x3) == (r & 0x3)) {
+ outb(r ^ 0x2, SNX_DCR (pb));
+
+ r = inb(SNX_DCR (pb));
+
+ if ((inb(SNX_ECR (pb)) & 0x2) == (r & 0x2)) {
+ goto no_reg;
+ }
+ }
+
+ if ((inb(SNX_ECR (pb)) & 0x3) != 0x1) {
+ goto no_reg;
+ }
+
+ ECR_WRITE(pb, 0x34);
+
+ if (inb(SNX_ECR (pb)) != 0x35) {
+ goto no_reg;
+ }
+
+ priv->ecr = 1;
+ outb(0xc, SNX_DCR (pb));
+
+
+ sunix_frob_set_mode(pb, ECR_SPP);
+
+ return 1;
+
+no_reg:
+ outb(0xc, SNX_DCR (pb));
+ return 0;
+}
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0))
+
+static int sunix_parport_PS2_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+
+static int sunix_parport_EPP_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+
+static int sunix_parport_ECPEPP_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+
+static int sunix_parport_ECPPS2_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+#else
+
+static int __devinit sunix_parport_PS2_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+
+static int __devinit sunix_parport_EPP_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+
+static int __devinit sunix_parport_ECPEPP_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+
+static int __devinit sunix_parport_ECPPS2_supported(struct snx_parport *pb)
+{
+ return 0;
+}
+
+#endif
+
+
+
+
+
+
+
+struct snx_parport *sunix_parport_pc_probe_port(struct sunix_par_port *priv)
+{
+ struct snx_parport_ops *ops = NULL;
+ struct snx_parport *p = NULL;
+ struct resource *base_res;
+ struct resource *ecr_res = NULL;
+
+ if (!priv) {
+ goto out1;
+ }
+
+ ops = kmalloc(sizeof(struct snx_parport_ops), GFP_KERNEL);
+ if (!ops) {
+ goto out1;
+ }
+
+ p = sunix_parport_register_port(priv, ops);
+ if (!p) {
+ goto out2;
+ }
+
+ base_res = request_region(p->base, SNX_PAR_ADDRESS_LENGTH, "snx_par_base");
+ if (!base_res) {
+ goto out3;
+ }
+
+ memcpy(ops, &sunix_parport_pc_ops, sizeof(struct snx_parport_ops));
+
+ 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);
+
+ p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
+ p->private_data = priv;
+
+ if (p->base_hi) {
+ ecr_res = request_region(p->base_hi, SNX_PAR_ADDRESS_LENGTH, "snx_par_ehan");
+ if (ecr_res) {
+ sunix_parport_ECR_present(p);
+ }
+
+ if (!sunix_parport_EPP_supported(p)) {
+ sunix_parport_ECPEPP_supported(p);
+ }
+ }
+
+ if (!sunix_parport_SPP_supported(p)) {
+ goto out4;
+ }
+
+ if (priv->ecr) {
+ sunix_parport_ECPPS2_supported(p);
+ } else {
+ sunix_parport_PS2_supported(p);
+ }
+
+ p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
+
+ printk("SNX Info : %s - PC-style at 0x%lx", p->name, p->base);
+ if (p->base_hi && priv->ecr) {
+ printk(" (0x%lx)\n", p->base_hi);
+ }
+
+ if (priv->ecr) {
+ ECR_WRITE(p, 0x34);
+ }
+
+ sunix_parport_pc_write_data(p, 0);
+
+ sunix_parport_pc_data_forward(p);
+
+
+ spin_lock(&snx_ports_lock);
+ list_add(&priv->list, &snx_ports_list);
+ spin_unlock(&snx_ports_lock);
+
+ sunix_parport_announce_port(p);
+
+ return p;
+
+out4:
+ if (ecr_res) {
+ release_region(p->base_hi, SNX_PAR_ADDRESS_LENGTH);
+ }
+
+ release_region(p->base, SNX_PAR_ADDRESS_LENGTH);
+
+out3:
+ sunix_parport_put_port(p);
+
+out2:
+ kfree (ops);
+
+out1:
+ return NULL;
+}
+
+
+void sunix_parport_pc_unregister_port(struct snx_parport *p)
+{
+ struct sunix_par_port *priv = p->private_data;
+ struct snx_parport_ops *ops = p->ops;
+
+ sunix_parport_remove_port(p);
+
+ spin_lock(&snx_ports_lock);
+ list_del_init(&priv->list);
+ spin_unlock(&snx_ports_lock);
+
+ release_region(p->base, SNX_PAR_ADDRESS_LENGTH);
+
+ if (p->base_hi) {
+ release_region(p->base_hi, SNX_PAR_ADDRESS_LENGTH);
+ }
+
+ sunix_parport_put_port(p);
+
+ kfree (ops);
+}
+
+
+int sunix_par_parport_init(void)
+{
+ struct sunix_par_port *pp = NULL;
+ int status = 0;
+ int i;
+
+ for (i = 0; i < SNX_PAR_TOTAL_MAX; i++) {
+ pp = &sunix_par_table[i];
+
+ if ((pp->base > 0) && (pp->chip_flag != SUNNONE_HWID)) {
+ pp->port = sunix_parport_pc_probe_port(pp);
+ if (!pp->port) {
+ status = -ENODEV;
+ break;
+ }
+ }
+
+ if (status != 0) {
+ break;
+ }
+ }
+
+ return status;
+}
+
+
+void sunix_par_parport_exit(void)
+{
+ spin_lock(&snx_ports_lock);
+ while (!list_empty(&snx_ports_list)) {
+ struct sunix_par_port *priv;
+ struct snx_parport *port;
+
+ priv = list_entry(snx_ports_list.next, struct sunix_par_port, list);
+
+ port = priv->port;
+ spin_unlock(&snx_ports_lock);
+ sunix_parport_pc_unregister_port(port);
+ spin_lock(&snx_ports_lock);
+ }
+ spin_unlock(&snx_ports_lock);
+}
+
diff --git a/char/snx/snx_ppdev.c b/char/snx/snx_ppdev.c
new file mode 100644
index 00000000..1e40382f
--- /dev/null
+++ b/char/snx/snx_ppdev.c
@@ -0,0 +1,1209 @@
+#include "snx_ppdev.h"
+
+#define SNX_PARPORT_MAX 4
+#define SNX_CHRDEV "sppdev"
+
+static int SNX_PPD_MAJOR;
+
+struct snx_pp_struct {
+ struct snx_pardevice *pdev;
+ wait_queue_head_t irq_wait;
+ atomic_t irqc;
+ unsigned int flags;
+ int irqresponse;
+ unsigned char irqctl;
+ struct ieee1284_info state;
+ struct ieee1284_info saved_state;
+ long default_inactivity;
+};
+
+
+#define SNX_PP_CLAIMED (1<<0)
+#define SNX_PP_EXCL (1<<1)
+
+
+#define SNX_PP_INTERRUPT_TIMEOUT (10 * HZ)
+#define SNX_PP_BUFFER_SIZE 1024
+#define SNX_PARDEVICE_MAX SNX_PAR_TOTAL_MAX
+
+
+static inline void snx_pp_enable_irq(struct snx_pp_struct *pp)
+{
+ struct snx_parport *port = pp->pdev->port;
+ port->ops->enable_irq(port);
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+static ssize_t snx_pp_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+#else
+static ssize_t snx_pp_read(struct file *file, char *buf, size_t count, loff_t *ppos)
+#endif
+{
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 19))
+ unsigned int minor = iminor(file->f_path.dentry->d_inode);
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(file->f_dentry->d_inode);
+#else
+ unsigned int minor = MINOR (file->f_dentry->d_inode->i_rdev);
+#endif
+
+ struct snx_pp_struct *pp = file->private_data;
+ char *kbuffer;
+ ssize_t bytes_read = 0;
+ struct snx_parport *pport;
+ int mode;
+
+ if (!(pp->flags & SNX_PP_CLAIMED)) {
+ printk("SNX Warng: %x claim the port first\n", minor);
+ return -EINVAL;
+ }
+
+ if (count == 0) {
+ return 0;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 9))
+ kbuffer = kmalloc(min_t(size_t, count, SNX_PP_BUFFER_SIZE), GFP_KERNEL);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 8))
+ kbuffer = kmalloc(min(size_t, count, SNX_PP_BUFFER_SIZE), GFP_KERNEL);
+#else
+ kbuffer = kmalloc(min(count, SNX_PP_BUFFER_SIZE), GFP_KERNEL);
+#endif
+ if (!kbuffer) {
+ return -ENOMEM;
+ }
+
+ pport = pp->pdev->port;
+ mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
+
+ sunix_parport_set_timeout(pp->pdev, (file->f_flags & O_NONBLOCK) ? SNX_PARPORT_INACTIVITY_O_NONBLOCK : pp->default_inactivity);
+
+ while (bytes_read == 0) {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 9))
+ ssize_t need = min_t(unsigned long, count, SNX_PP_BUFFER_SIZE);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 8))
+ ssize_t need = min(unsigned long, count, SNX_PP_BUFFER_SIZE);
+#else
+ ssize_t need = min(count - bytes_read, SNX_PP_BUFFER_SIZE);
+#endif
+ if (mode == IEEE1284_MODE_EPP) {
+ int flags = 0;
+ size_t (*fn)(struct snx_parport *, void *, size_t, int);
+
+ if (pp->flags & SNX_PP_W91284PIC) {
+ flags |= PARPORT_W91284PIC;
+ }
+
+ if (pp->flags & SNX_PP_FASTREAD) {
+ flags |= PARPORT_EPP_FAST;
+ }
+
+ if (pport->ieee1284.mode & IEEE1284_ADDR) {
+ fn = pport->ops->epp_read_addr;
+ } else {
+ fn = pport->ops->epp_read_data;
+ }
+
+ bytes_read = (*fn)(pport, kbuffer, need, flags);
+ } else {
+ bytes_read = sunix_parport_read(pport, kbuffer, need);
+ }
+
+ if (bytes_read != 0) {
+ break;
+ }
+
+ if (file->f_flags & O_NONBLOCK) {
+ bytes_read = -EAGAIN;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ bytes_read = -ERESTARTSYS;
+ break;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 19))
+ cond_resched();
+#else
+ if (current->need_resched) {
+ schedule();
+ }
+#endif
+ }
+
+ sunix_parport_set_timeout(pp->pdev, pp->default_inactivity);
+
+ if (bytes_read > 0 && copy_to_user(buf, kbuffer, bytes_read)) {
+ bytes_read = -EFAULT;
+ }
+
+ kfree(kbuffer);
+ snx_pp_enable_irq(pp);
+
+ return bytes_read;
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+static ssize_t snx_pp_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+#else
+static ssize_t snx_pp_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
+#endif
+{
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 19))
+ unsigned int minor = iminor(file->f_path.dentry->d_inode);
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(file->f_dentry->d_inode);
+#else
+ unsigned int minor = MINOR (file->f_dentry->d_inode->i_rdev);
+#endif
+
+ struct snx_pp_struct *pp = file->private_data;
+ char *kbuffer;
+ ssize_t bytes_written = 0;
+ ssize_t wrote;
+ int mode;
+ struct snx_parport *pport;
+
+ if (!(pp->flags & SNX_PP_CLAIMED)) {
+ printk("SNX Warng: %x claim the port first\n", minor);
+ return -EINVAL;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 9))
+ kbuffer = kmalloc(min_t(size_t, count, SNX_PP_BUFFER_SIZE), GFP_KERNEL);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 8))
+ kbuffer = kmalloc(min(size_t, count, SNX_PP_BUFFER_SIZE), GFP_KERNEL);
+#else
+ kbuffer = kmalloc(min(count, SNX_PP_BUFFER_SIZE), GFP_KERNEL);
+#endif
+
+ if (!kbuffer) {
+ return -ENOMEM;
+ }
+
+ pport = pp->pdev->port;
+ mode = pport->ieee1284.mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
+
+ sunix_parport_set_timeout(pp->pdev, (file->f_flags & O_NONBLOCK) ? SNX_PARPORT_INACTIVITY_O_NONBLOCK : pp->default_inactivity);
+
+ while (bytes_written < count) {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 9))
+ ssize_t n = min_t(unsigned long, count - bytes_written, SNX_PP_BUFFER_SIZE);
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 8))
+ ssize_t n = min(unsigned long, count - bytes_written, SNX_PP_BUFFER_SIZE);
+#else
+ ssize_t n = min(count - bytes_written, SNX_PP_BUFFER_SIZE);
+#endif
+
+ if (copy_from_user(kbuffer, buf + bytes_written, n)) {
+ bytes_written = -EFAULT;
+ break;
+ }
+
+ if ((pp->flags & SNX_PP_FASTWRITE) && (mode == IEEE1284_MODE_EPP)) {
+ if (pport->ieee1284.mode & IEEE1284_ADDR) {
+ wrote = pport->ops->epp_write_addr(pport, kbuffer, n, PARPORT_EPP_FAST);
+ } else {
+ wrote = pport->ops->epp_write_data(pport, kbuffer, n, PARPORT_EPP_FAST);
+ }
+ } else {
+ wrote = sunix_parport_write(pp->pdev->port, kbuffer, n);
+ }
+
+ if (wrote <= 0) {
+ if (!bytes_written) {
+ bytes_written = wrote;
+ }
+ break;
+ }
+
+ bytes_written += wrote;
+
+ if (file->f_flags & O_NONBLOCK) {
+ if (!bytes_written) {
+ bytes_written = -EAGAIN;
+ }
+ break;
+ }
+
+ if (signal_pending(current)) {
+ if (!bytes_written) {
+ bytes_written = -EINTR;
+ }
+ break;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 19))
+ cond_resched();
+#else
+ if (current->need_resched) {
+ schedule();
+ }
+#endif
+ }
+
+ sunix_parport_set_timeout(pp->pdev, pp->default_inactivity);
+
+ kfree(kbuffer);
+ snx_pp_enable_irq(pp);
+
+ return bytes_written;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+static void snx_pp_irq(int irq, void *private, struct pt_regs *nouse)
+{
+ struct snx_pp_struct *pp = (struct snx_pp_struct *) private;
+
+ if (pp->irqresponse) {
+ sunix_parport_write_control(pp->pdev->port, pp->irqctl);
+ pp->irqresponse = 0;
+ }
+
+ atomic_inc(&pp->irqc);
+ wake_up_interruptible(&pp->irq_wait);
+}
+#endif
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+static int snx_register_device(int minor, struct snx_pp_struct *pp)
+{
+ struct snx_parport *port;
+ struct snx_pardevice *pdev = NULL;
+ char *name;
+ int fl;
+
+ name = kmalloc(strlen(SNX_CHRDEV) + 3, GFP_KERNEL);
+ if (name == NULL) {
+ return -ENOMEM;
+ }
+
+ sprintf(name, SNX_CHRDEV "%x", minor);
+
+ port = sunix_parport_find_number(minor);
+ if (!port) {
+ printk("SNX Error: %s no associated port!\n", name);
+ kfree (name);
+ return -ENXIO;
+ }
+
+ fl = (pp->flags & SNX_PP_EXCL) ? PARPORT_FLAG_EXCL : 0;
+
+ pdev = sunix_parport_register_device(port, name, NULL, NULL, snx_pp_irq, fl, (struct snx_pp_struct *)pp);
+
+ sunix_parport_put_port(port);
+
+ if (!pdev) {
+ printk("SNX Error: %s failed to register device!\n", name);
+ kfree (name);
+ return -ENXIO;
+ }
+
+ pp->pdev = pdev;
+ return 0;
+}
+#endif
+
+static enum ieee1284_phase snx_init_phase(int mode)
+{
+ switch (mode & ~(IEEE1284_DEVICEID | IEEE1284_ADDR)) {
+ case IEEE1284_MODE_NIBBLE:
+ case IEEE1284_MODE_BYTE:
+ return IEEE1284_PH_REV_IDLE;
+ }
+
+ return IEEE1284_PH_FWD_IDLE;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+static int snx_pp_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(inode);
+#else
+ unsigned int minor = MINOR(inode->i_rdev);
+#endif
+ struct snx_pp_struct *pp = file->private_data;
+ struct snx_parport *port;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ void __user *argp = (void __user *)arg;
+#endif
+
+ switch (cmd) {
+ case SNX_PAR_DUMP_PORT_INFO:
+ {
+ struct snx_par_port_info snx_port_info;
+ struct sunix_par_port *sdn = NULL;
+
+ memset(&snx_port_info, 0, (sizeof(struct snx_par_port_info)));
+
+ minor = minor - 2;
+ if (minor >= 0) {
+ sdn = (struct sunix_par_port *) &sunix_par_table[minor];
+
+ memcpy(&snx_port_info.board_name_info[0], &sdn->pb_info.board_name[0], SNX_BOARDNAME_LENGTH);
+
+ snx_port_info.bus_number_info = sdn->bus_number;
+ snx_port_info.dev_number_info = sdn->dev_number;
+ snx_port_info.port_info = sdn->portnum + 2;
+ snx_port_info.base_info = sdn->base;
+ snx_port_info.base_hi_info = sdn->base_hi;
+ snx_port_info.irq_info = sdn->irq;
+
+ if (copy_to_user((void *)arg, &snx_port_info, sizeof(struct snx_par_port_info))) {
+ return -EFAULT;
+ } else {
+ return 0;
+ }
+ } else {
+ return -ENXIO;
+ }
+ }
+
+ case SNX_PPCLAIM:
+ {
+ struct ieee1284_info *info;
+ int ret;
+
+ if (pp->flags & SNX_PP_CLAIMED) {
+ printk("SNX Warng: %x you've already got it!\n", minor);
+ return -EINVAL;
+ }
+
+ if (!pp->pdev) {
+ int err = snx_register_device(minor, pp);
+ if (err) {
+ return err;
+ }
+ }
+
+ ret = sunix_parport_claim_or_block(pp->pdev);
+ if (ret < 0) {
+ return ret;
+ }
+
+ pp->flags |= SNX_PP_CLAIMED;
+
+ snx_pp_enable_irq(pp);
+
+ info = &pp->pdev->port->ieee1284;
+ pp->saved_state.mode = info->mode;
+ pp->saved_state.phase = info->phase;
+ info->mode = pp->state.mode;
+ info->phase = pp->state.phase;
+
+ pp->default_inactivity = sunix_parport_set_timeout(pp->pdev, 0);
+
+ sunix_parport_set_timeout(pp->pdev, pp->default_inactivity);
+ return 0;
+ }
+
+
+ case SNX_PPEXCL:
+ {
+ if (pp->pdev) {
+ printk("SNX Warng: %x too late for SNX_PPEXCL; already registered\n", minor);
+ if (pp->flags & SNX_PP_EXCL) {
+ return 0;
+ }
+ return -EINVAL;
+ }
+
+ pp->flags |= SNX_PP_EXCL;
+ return 0;
+ }
+
+ case SNX_PPSETMODE:
+ {
+ int mode;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&mode, argp, sizeof (mode)))
+#else
+ if (copy_from_user(&mode, (int *)arg, sizeof (mode)))
+#endif
+ {
+ return -EFAULT;
+ }
+ pp->state.mode = mode;
+ pp->state.phase = snx_init_phase(mode);
+
+ if (pp->flags & SNX_PP_CLAIMED) {
+ pp->pdev->port->ieee1284.mode = mode;
+ pp->pdev->port->ieee1284.phase = pp->state.phase;
+ }
+
+ return 0;
+ }
+
+
+ case SNX_PPGETMODE:
+ {
+ int mode;
+
+ if (pp->flags & SNX_PP_CLAIMED) {
+ mode = pp->pdev->port->ieee1284.mode;
+ } else {
+ mode = pp->state.mode;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &mode, sizeof (mode)))
+#else
+ if (copy_to_user((int *)arg, &mode, sizeof (mode)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+
+
+ case SNX_PPSETPHASE:
+ {
+ int phase;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&phase, argp, sizeof (phase)))
+#else
+ if (copy_from_user(&phase, (int *) arg, sizeof (phase)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ pp->state.phase = phase;
+
+ if (pp->flags & SNX_PP_CLAIMED) {
+ pp->pdev->port->ieee1284.phase = phase;
+ }
+ return 0;
+ }
+
+ case SNX_PPGETPHASE:
+ {
+ int phase;
+
+ if (pp->flags & SNX_PP_CLAIMED) {
+ phase = pp->pdev->port->ieee1284.phase;
+ } else {
+ phase = pp->state.phase;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &phase, sizeof (phase)))
+#else
+ if (copy_to_user((int *)arg, &phase, sizeof (phase)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+
+
+ case SNX_PPGETMODES:
+ {
+ unsigned int modes;
+
+ port = sunix_parport_find_number(minor);
+ if (!port) {
+ return -ENODEV;
+ }
+
+ modes = port->modes;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &modes, sizeof (modes)))
+#else
+ if (copy_to_user((unsigned int *)arg, &modes, sizeof (port->modes)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+
+
+ case SNX_PPSETFLAGS:
+ {
+ int uflags;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&uflags, argp, sizeof (uflags)))
+#else
+ if (copy_from_user(&uflags, (int *)arg, sizeof (uflags)))
+#endif
+ {
+ return -EFAULT;
+ }
+ pp->flags &= ~SNX_PP_FLAGMASK;
+ pp->flags |= (uflags & SNX_PP_FLAGMASK);
+
+ return 0;
+ }
+
+
+ case SNX_PPGETFLAGS:
+ {
+ int uflags;
+
+ uflags = pp->flags & SNX_PP_FLAGMASK;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &uflags, sizeof (uflags)))
+#else
+ if (copy_to_user((int *)arg, &uflags, sizeof (uflags)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+ }
+
+
+ if ((pp->flags & SNX_PP_CLAIMED) == 0) {
+ printk("SNX Warng: %x claim the port first\n", minor);
+ return -EINVAL;
+ }
+
+
+ port = pp->pdev->port;
+ switch (cmd) {
+ struct ieee1284_info *info;
+ unsigned char reg;
+ unsigned char mask;
+ int mode;
+ int ret;
+ struct timeval par_timeout;
+ long to_jiffies;
+
+ case SNX_PPRSTATUS:
+ {
+ reg = sunix_parport_read_status(port);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &reg, sizeof (reg)))
+#else
+ if (copy_to_user((unsigned char *) arg, &reg, sizeof (reg)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+
+
+ case SNX_PPRDATA:
+ {
+ reg = sunix_parport_read_data(port);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &reg, sizeof (reg)))
+#else
+ if (copy_to_user((unsigned char *) arg, &reg, sizeof (reg)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+
+
+ case SNX_PPRCONTROL:
+ {
+ reg = sunix_parport_read_control(port);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &reg, sizeof (reg)))
+#else
+ if (copy_to_user((unsigned char *) arg, &reg, sizeof (reg)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+
+
+ case SNX_PPYIELD:
+ {
+ sunix_parport_yield_blocking(pp->pdev);
+ return 0;
+ }
+
+ case SNX_PPRELEASE:
+ {
+ info = &pp->pdev->port->ieee1284;
+ pp->state.mode = info->mode;
+ pp->state.phase = info->phase;
+ info->mode = pp->saved_state.mode;
+ info->phase = pp->saved_state.phase;
+
+ sunix_parport_release(pp->pdev);
+
+ pp->flags &= ~SNX_PP_CLAIMED;
+
+ return 0;
+ }
+
+
+ case SNX_PPWCONTROL:
+ {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&reg, argp, sizeof (reg)))
+#else
+ if (copy_from_user(&reg, (unsigned char *) arg, sizeof (reg)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ sunix_parport_write_control(port, reg);
+
+ return 0;
+ }
+
+
+ case SNX_PPWDATA:
+ {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&reg, argp, sizeof (reg)))
+#else
+ if (copy_from_user(&reg, (unsigned char *) arg, sizeof (reg)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ sunix_parport_write_data(port, reg);
+ return 0;
+ }
+
+
+ case SNX_PPFCONTROL:
+ {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&mask, argp, sizeof (mask)))
+#else
+ if (copy_from_user(&mask, (unsigned char *) arg, sizeof (mask)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&reg, 1 + (unsigned char __user *) arg, sizeof (reg)))
+#else
+ if (copy_from_user(&reg, 1 + (unsigned char *) arg, sizeof (reg)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ sunix_parport_frob_control(port, mask, reg);
+
+ return 0;
+ }
+
+
+ case SNX_PPDATADIR:
+ {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&mode, argp, sizeof (mode)))
+#else
+ if (copy_from_user(&mode, (int *) arg, sizeof (mode)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ if (mode) {
+ port->ops->data_reverse(port);
+ } else {
+ port->ops->data_forward(port);
+ }
+
+ return 0;
+ }
+
+ case SNX_PPNEGOT:
+ {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&mode, argp, sizeof (mode)))
+#else
+ if (copy_from_user(&mode, (int *) arg, sizeof (mode)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ switch ((ret = sunix_parport_negotiate(port, mode))) {
+ case 0:
+ break;
+
+ case -1:
+ ret = -EIO;
+ break;
+
+ case 1:
+ ret = -ENXIO;
+ break;
+ }
+
+ snx_pp_enable_irq(pp);
+ return ret;
+ }
+
+
+ case SNX_PPWCTLONIRQ:
+ {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&reg, argp, sizeof (reg)))
+#else
+ if (copy_from_user(&reg, (unsigned char *) arg, sizeof (reg)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ pp->irqctl = reg;
+ pp->irqresponse = 1;
+ return 0;
+ }
+
+
+ case SNX_PPCLRIRQ:
+ {
+ ret = atomic_read(&pp->irqc);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &ret, sizeof (ret)))
+#else
+ if (copy_to_user((int *) arg, &ret, sizeof (ret)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ atomic_sub(ret, &pp->irqc);
+ return 0;
+ }
+
+
+ case SNX_PPSETTIME:
+ {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_from_user(&par_timeout, argp, sizeof(struct timeval)))
+#else
+ if (copy_from_user(&par_timeout, (struct timeval *)arg, sizeof(struct timeval)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ if ((par_timeout.tv_sec < 0) || (par_timeout.tv_usec < 0)) {
+ return -EINVAL;
+ }
+
+ to_jiffies = SNX_ROUND_UP(par_timeout.tv_usec, 1000000/HZ);
+ to_jiffies += par_timeout.tv_sec * (long)HZ;
+
+ if (to_jiffies <= 0) {
+ return -EINVAL;
+ }
+
+ pp->pdev->timeout = to_jiffies;
+ return 0;
+ }
+
+
+ case SNX_PPGETTIME:
+ {
+ to_jiffies = pp->pdev->timeout;
+ par_timeout.tv_sec = to_jiffies / HZ;
+ par_timeout.tv_usec = (to_jiffies % (long)HZ) * (1000000/HZ);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 26))
+ if (copy_to_user(argp, &par_timeout, sizeof(struct timeval)))
+#else
+ if (copy_to_user((struct timeval *)arg, &par_timeout, sizeof(struct timeval)))
+#endif
+ {
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+
+
+ default:
+ {
+ printk("SNX Error: %x What? (cmd=0x%x)\n", minor, cmd);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+#else
+static long snx_dump_par_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ unsigned int minor = 0;
+
+ switch (cmd) {
+ case SNX_PAR_DUMP_PORT_INFO:
+ {
+ struct snx_par_port_info snx_port_info;
+ struct sunix_par_port *sdn = NULL;
+
+ memset(&snx_port_info, 0, (sizeof(struct snx_par_port_info)));
+
+ if (copy_from_user(&snx_port_info, (void *)arg, (sizeof(struct snx_par_port_info)))) {
+ return -EFAULT;
+ }
+
+ minor = snx_port_info.minor - 2;
+
+ if (minor >= 0) {
+ sdn = (struct sunix_par_port *) &sunix_par_table[minor];
+
+ memcpy(&snx_port_info.board_name_info[0], &sdn->pb_info.board_name[0], SNX_BOARDNAME_LENGTH);
+
+ snx_port_info.bus_number_info = sdn->bus_number;
+ snx_port_info.dev_number_info = sdn->dev_number;
+ snx_port_info.port_info = sdn->portnum + 2;
+ snx_port_info.base_info = sdn->base;
+ snx_port_info.base_hi_info = sdn->base_hi;
+ snx_port_info.irq_info = sdn->irq;
+
+ if (copy_to_user((void *)arg, &snx_port_info, sizeof(struct snx_par_port_info))) {
+ return -EFAULT;
+ } else {
+ return 0;
+ }
+
+ } else {
+ return -ENXIO;
+ }
+ }
+
+ case SNX_PAR_DUMP_DRIVER_VER:
+ {
+ char driver_ver[SNX_DRIVERVERSION_LENGTH];
+
+ memset(driver_ver, 0, (sizeof(char) * SNX_DRIVERVERSION_LENGTH));
+
+ memcpy(&driver_ver[0], SNX_DRIVER_VERSION, sizeof(SNX_DRIVER_VERSION));
+
+ if (copy_to_user((void *)arg, &driver_ver, (sizeof(char) * SNX_DRIVERVERSION_LENGTH))) {
+ return -EFAULT;
+ } else {
+ return 0;
+ }
+
+ break;
+ }
+ }
+ return 0;
+}
+#endif
+
+static int snx_pp_open(struct inode *inode, struct file *file)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(inode);
+#else
+ unsigned int minor = MINOR(inode->i_rdev);
+#endif
+
+ struct snx_pp_struct *pp;
+
+ if (minor >= PARPORT_MAX) {
+ return -ENXIO;
+ }
+
+ pp = kmalloc(sizeof(struct snx_pp_struct), GFP_KERNEL);
+ if (!pp) {
+ return -ENOMEM;
+ }
+
+ pp->state.mode = IEEE1284_MODE_COMPAT;
+ pp->state.phase = snx_init_phase(pp->state.mode);
+ pp->flags = 0;
+ pp->irqresponse = 0;
+ atomic_set(&pp->irqc, 0);
+
+ init_waitqueue_head(&pp->irq_wait);
+
+
+ pp->pdev = NULL;
+ file->private_data = pp;
+
+ return 0;
+}
+
+
+static int snx_pp_release(struct inode *inode, struct file *file)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ unsigned int minor = iminor(inode);
+#else
+ unsigned int minor = MINOR(inode->i_rdev);
+#endif
+ struct snx_pp_struct *pp = file->private_data;
+ int compat_negot;
+
+ compat_negot = 0;
+ if (!(pp->flags & SNX_PP_CLAIMED) && pp->pdev && (pp->state.mode != IEEE1284_MODE_COMPAT)) {
+ struct ieee1284_info *info;
+
+ sunix_parport_claim_or_block(pp->pdev);
+
+ pp->flags |= SNX_PP_CLAIMED;
+ info = &pp->pdev->port->ieee1284;
+ pp->saved_state.mode = info->mode;
+ pp->saved_state.phase = info->phase;
+ info->mode = pp->state.mode;
+ info->phase = pp->state.phase;
+ compat_negot = 1;
+ } else if ((pp->flags & SNX_PP_CLAIMED) && pp->pdev && (pp->pdev->port->ieee1284.mode != IEEE1284_MODE_COMPAT)) {
+ compat_negot = 2;
+ }
+
+ if (compat_negot) {
+ sunix_parport_negotiate(pp->pdev->port, IEEE1284_MODE_COMPAT);
+ printk("SNX Warng: %x negotiated back to compatibility mode because user-space forgot\n", minor);
+ }
+
+
+ if (pp->flags & SNX_PP_CLAIMED) {
+ struct ieee1284_info *info;
+
+ info = &pp->pdev->port->ieee1284;
+ pp->state.mode = info->mode;
+ pp->state.phase = info->phase;
+ info->mode = pp->saved_state.mode;
+ info->phase = pp->saved_state.phase;
+
+ sunix_parport_release(pp->pdev);
+
+ if (compat_negot != 1) {
+ printk("SNX Warng: %x released pardevice because user-space forgot\n", minor);
+ }
+ }
+
+
+ if (pp->pdev) {
+ const char *name = pp->pdev->name;
+ sunix_parport_unregister_device(pp->pdev);
+ kfree(name);
+ pp->pdev = NULL;
+ }
+
+ kfree(pp);
+ return 0;
+}
+
+
+static unsigned int snx_pp_poll(struct file *file, poll_table *wait)
+{
+ struct snx_pp_struct *pp = file->private_data;
+ unsigned int mask = 0;
+
+ poll_wait(file, &pp->irq_wait, wait);
+
+ if (atomic_read(&pp->irqc)) {
+ mask |= POLLIN | POLLRDNORM;
+ }
+ return mask;
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 4, 9))
+static struct file_operations snx_pp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = snx_pp_read,
+ .write = snx_pp_write,
+ .poll = snx_pp_poll,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+ .ioctl = snx_pp_ioctl,
+#else
+ .unlocked_ioctl = snx_dump_par_ioctl,
+#endif
+ .open = snx_pp_open,
+ .release = snx_pp_release,
+};
+#else
+static loff_t snx_pp_lseek(struct file *file, long long offset, int origin)
+{
+ return -ESPIPE;
+}
+
+
+static struct file_operations snx_pp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = snx_pp_lseek,
+ .read = snx_pp_read,
+ .write = snx_pp_write,
+ .poll = snx_pp_poll,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+ .ioctl = snx_pp_ioctl,
+#else
+ .unlocked_ioctl = snx_dump_par_ioctl,
+#endif
+ .open = snx_pp_open,
+ .release = snx_pp_release,
+};
+#endif
+
+/*
+static struct file_operations snx_pp_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = snx_pp_lseek,
+ .read = snx_pp_read,
+ .write = snx_pp_write,
+ .poll = snx_pp_poll,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
+ .ioctl = snx_pp_ioctl,
+#else
+ .unlocked_ioctl = snx_pp_ioctl,
+#endif
+
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = snx_pp_ioctl,
+#endif
+
+ .open = snx_pp_open,
+ .release = snx_pp_release
+};
+#endif
+*/
+
+
+
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+static struct class *snx_ppdev_class;
+
+static void snx_pp_attach(struct snx_parport *port)
+{
+#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 26))
+ device_create(snx_ppdev_class, NULL, MKDEV(SNX_PPD_MAJOR, port->number), "parport%d", port->number);
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 27))
+ device_create_drvdata(snx_ppdev_class, NULL, MKDEV(SNX_PPD_MAJOR, port->number), NULL, "parport%d", port->number);
+#else
+ device_create(snx_ppdev_class, NULL, MKDEV(SNX_PPD_MAJOR, port->number), NULL, "parport%d", port->number);
+#endif
+}
+
+static void snx_pp_detach(struct snx_parport *port)
+{
+ device_destroy(snx_ppdev_class, MKDEV(SNX_PPD_MAJOR, port->number));
+}
+
+static struct snx_parport_driver snx_pp_driver = {
+ .name = SNX_CHRDEV,
+ .attach = snx_pp_attach,
+ .detach = snx_pp_detach,
+};
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+#else
+static devfs_handle_t devfs_handle;
+#endif
+
+
+extern int sunix_par_ppdev_init(void)
+{
+#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)) && (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)))
+ int i;
+#endif
+ int err = 0;
+
+ SNX_PPD_MAJOR = register_chrdev(0, SNX_CHRDEV, &snx_pp_fops);
+
+ if (SNX_PPD_MAJOR < 0) {
+ printk("SNX Error: unable to get major \n");
+ return -EIO;
+ }
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ devfs_handle = devfs_mk_dir(NULL, "parports", NULL);
+
+ devfs_register_series(devfs_handle,
+ "%u",
+ SNX_PARPORT_MAX,
+ DEVFS_FL_DEFAULT,
+ SNX_PPD_MAJOR,
+ 0,
+ S_IFCHR | S_IRUGO | S_IWUGO,
+ &snx_pp_fops,
+ NULL
+ );
+
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17))
+ for (i = 2; i < SNX_PARPORT_MAX; i++) {
+ devfs_mk_cdev(MKDEV(SNX_PPD_MAJOR, i), S_IFCHR | S_IRUGO | S_IWUGO, "parports/%d", i);
+ }
+#else
+ snx_ppdev_class = class_create(THIS_MODULE, SNX_CHRDEV);
+ if (IS_ERR(snx_ppdev_class)) {
+ err = PTR_ERR(snx_ppdev_class);
+ goto out_chrdev;
+ }
+
+
+ if (sunix_parport_register_driver(&snx_pp_driver)) {
+ printk("SNX Error: unable to register with parport\n\n");
+ goto out_class;
+ }
+
+ goto out;
+
+out_class:
+ class_destroy(snx_ppdev_class);
+out_chrdev:
+
+ unregister_chrdev(SNX_PPD_MAJOR, SNX_CHRDEV);
+
+out:
+#endif
+
+ return err;
+}
+
+
+extern void sunix_par_ppdev_exit(void)
+{
+#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)) && (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17)))
+ int i;
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ devfs_unregister(devfs_handle);
+ devfs_unregister_chrdev(SNX_PPD_MAJOR, SNX_CHRDEV);
+
+#elif (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 17))
+ for (i = 2; i < SNX_PARPORT_MAX; i++) {
+ devfs_remove("parports/%d", i);
+ }
+ devfs_remove("parports");
+#else
+ sunix_parport_unregister_driver(&snx_pp_driver);
+ class_destroy(snx_ppdev_class);
+#endif
+
+ unregister_chrdev(SNX_PPD_MAJOR, SNX_CHRDEV);
+}
+
diff --git a/char/snx/snx_share.c b/char/snx/snx_share.c
new file mode 100644
index 00000000..30691c4e
--- /dev/null
+++ b/char/snx/snx_share.c
@@ -0,0 +1,974 @@
+#include "snx_common.h"
+
+
+#define SNX_PARPORT_DEFAULT_TIMESLICE (HZ/5)
+
+
+unsigned long sunix_parport_default_timeslice = SNX_PARPORT_DEFAULT_TIMESLICE;
+int sunix_parport_default_spintime = DEFAULT_SPIN_TIME;
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static LIST_HEAD(snx_portlist);
+static DEFINE_SPINLOCK(snx_full_list_lock);
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+static LIST_HEAD(snx_portlist);
+static spinlock_t snx_full_list_lock = SPIN_LOCK_UNLOCKED;
+#else
+//static struct snx_parport *snx_portlist = NULL;
+//static struct snx_parport *snx_portlist_tail = NULL;
+static struct snx_parport *snx_portlist;
+static struct snx_parport *snx_portlist_tail;
+static spinlock_t snx_driverlist_lock = SPIN_LOCK_UNLOCKED;
+//static struct snx_parport_driver *snx_driver_chain = NULL;
+static struct snx_parport_driver *snx_driver_chain;
+#endif
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
+static DEFINE_SPINLOCK(snx_parportlist_lock);
+#else
+static spinlock_t snx_parportlist_lock = SPIN_LOCK_UNLOCKED;
+#endif
+static LIST_HEAD(snx_all_ports);
+static LIST_HEAD(snx_drivers);
+
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
+
+static DECLARE_MUTEX(snx_registration_lock);
+
+#else
+
+static DEFINE_SEMAPHORE(snx_registration_lock);
+
+#endif
+
+
+static void sunix_dead_write_lines(struct snx_parport *p, unsigned char b) {}
+static unsigned char sunix_dead_read_lines(struct snx_parport *p) { return 0; }
+static unsigned char sunix_dead_frob_lines(struct snx_parport *p, unsigned char b, unsigned char c) {return 0; }
+static void sunix_dead_onearg(struct snx_parport *p) {}
+static void sunix_dead_initstate(struct snx_pardevice *d, struct snx_parport_state *s) {}
+static void sunix_dead_state(struct snx_parport *p, struct snx_parport_state *s) {}
+static size_t sunix_dead_write(struct snx_parport *p, const void *b, size_t l, int f) { return 0; }
+static size_t sunix_dead_read(struct snx_parport *p, void *b, size_t l, int f) { return 0; }
+
+
+static struct snx_parport_ops sunix_dead_ops = {
+ .write_data = sunix_dead_write_lines,
+ .read_data = sunix_dead_read_lines,
+ .write_control = sunix_dead_write_lines,
+ .read_control = sunix_dead_read_lines,
+ .frob_control = sunix_dead_frob_lines,
+ .read_status = sunix_dead_read_lines,
+ .enable_irq = sunix_dead_onearg,
+ .disable_irq = sunix_dead_onearg,
+ .data_forward = sunix_dead_onearg,
+ .data_reverse = sunix_dead_onearg,
+ .init_state = sunix_dead_initstate,
+ .save_state = sunix_dead_state,
+ .restore_state = sunix_dead_state,
+ .epp_write_data = sunix_dead_write,
+ .epp_read_data = sunix_dead_read,
+ .epp_write_addr = sunix_dead_write,
+ .epp_read_addr = sunix_dead_read,
+ .ecp_write_data = sunix_dead_write,
+ .ecp_read_data = sunix_dead_read,
+ .ecp_write_addr = sunix_dead_write,
+ .compat_write_data = sunix_dead_write,
+ .nibble_read_data = sunix_dead_read,
+ .byte_read_data = sunix_dead_read,
+ .owner = NULL,
+};
+
+
+static void sunix_attach_driver_chain(struct snx_parport *port)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ struct snx_parport_driver *drv;
+ list_for_each_entry(drv, &snx_drivers, list) drv->attach(port);
+#else
+ struct snx_parport_driver *drv;
+ void (**attach) (struct snx_parport *);
+ int count = 0;
+ int i;
+
+ spin_lock(&snx_driverlist_lock);
+ for (drv = snx_driver_chain; drv; drv = drv->next) {
+ count++;
+ }
+
+ spin_unlock(&snx_driverlist_lock);
+
+ attach = kmalloc(sizeof (void(*)(struct snx_parport *)) * count, GFP_KERNEL);
+
+ if (!attach) {
+ printk("SNX Warng: not enough memory to attach\n");
+ return;
+ }
+
+ spin_lock(&snx_driverlist_lock);
+
+ for (i = 0, drv = snx_driver_chain; drv && i < count; drv = drv->next) {
+ attach[i++] = drv->attach;
+ }
+
+ spin_unlock(&snx_driverlist_lock);
+
+ for (count = 0; count < i; count++) {
+ (*attach[count])(port);
+ }
+
+ kfree (attach);
+#endif
+}
+
+
+static void sunix_detach_driver_chain(struct snx_parport *port)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ struct snx_parport_driver *drv;
+ list_for_each_entry(drv, &snx_drivers, list) drv->detach (port);
+#else
+ struct snx_parport_driver *drv;
+
+ spin_lock(&snx_driverlist_lock);
+ for (drv = snx_driver_chain; drv; drv = drv->next) {
+ drv->detach(port);
+ }
+
+ spin_unlock(&snx_driverlist_lock);
+#endif
+}
+
+
+int sunix_parport_register_driver(struct snx_parport_driver *drv)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ struct snx_parport *port;
+
+ down(&snx_registration_lock);
+
+ list_for_each_entry(port, &snx_portlist, list) drv->attach(port);
+ list_add(&drv->list, &snx_drivers);
+
+ up(&snx_registration_lock);
+
+ return 0;
+#else
+ struct snx_parport *port;
+ struct snx_parport **ports;
+ int count = 0;
+ int i;
+
+ spin_lock(&snx_parportlist_lock);
+
+ for (port = snx_portlist; port; port = port->next) {
+ count++;
+ }
+
+ spin_unlock(&snx_parportlist_lock);
+
+ ports = kmalloc(sizeof(struct snx_parport *) * count, GFP_KERNEL);
+
+ if (!ports) {
+ printk("SNX Warng: not enough memory to attach\n");
+ } else {
+ spin_lock(&snx_parportlist_lock);
+
+ for (i = 0, port = snx_portlist; port && i < count; port = port->next) {
+ ports[i++] = port;
+ }
+
+ spin_unlock(&snx_parportlist_lock);
+
+ for (count = 0; count < i; count++) {
+ drv->attach(ports[count]);
+ }
+
+ kfree(ports);
+ }
+
+ spin_lock(&snx_driverlist_lock);
+
+ drv->next = snx_driver_chain;
+ snx_driver_chain = drv;
+
+ spin_unlock(&snx_driverlist_lock);
+
+ return 0;
+#endif
+}
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+void sunix_parport_unregister_driver(struct snx_parport_driver *drv)
+{
+ struct snx_parport *port;
+
+ down(&snx_registration_lock);
+
+ list_del_init(&drv->list);
+ list_for_each_entry(port, &snx_portlist, list) drv->detach(port);
+
+ up(&snx_registration_lock);
+}
+#else
+void sunix_parport_unregister_driver(struct snx_parport_driver *arg)
+{
+ struct snx_parport_driver *drv = snx_driver_chain;
+ struct snx_parport_driver *olddrv = NULL;
+
+ while (drv) {
+ if (drv == arg) {
+ struct snx_parport *port;
+
+ spin_lock(&snx_driverlist_lock);
+ if (olddrv) {
+ olddrv->next = drv->next;
+ } else {
+ snx_driver_chain = drv->next;
+ }
+
+ spin_unlock(&snx_driverlist_lock);
+
+ spin_lock(&snx_parportlist_lock);
+
+ for (port = snx_portlist; port; port = port->next) {
+ drv->detach(port);
+ }
+
+ spin_unlock(&snx_parportlist_lock);
+
+ return;
+ }
+ olddrv = drv;
+ drv = drv->next;
+ }
+}
+#endif
+
+
+static void sunix_free_port(struct snx_parport *port)
+{
+ int d;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ spin_lock(&snx_full_list_lock);
+ list_del(&port->full_list);
+ spin_unlock(&snx_full_list_lock);
+
+ for (d = 0; d < 5; d++) {
+ kfree(port->probe_info[d].class_name);
+ kfree(port->probe_info[d].mfr);
+ kfree(port->probe_info[d].model);
+ kfree(port->probe_info[d].cmdset);
+ kfree(port->probe_info[d].description);
+ }
+#else
+
+ for (d = 0; d < 5; d++) {
+ if (port->probe_info[d].class_name) {
+ kfree (port->probe_info[d].class_name);
+ }
+
+ if (port->probe_info[d].mfr) {
+ kfree (port->probe_info[d].mfr);
+ }
+
+ if (port->probe_info[d].model) {
+ kfree (port->probe_info[d].model);
+ }
+
+ if (port->probe_info[d].cmdset) {
+ kfree (port->probe_info[d].cmdset);
+ }
+
+ if (port->probe_info[d].description) {
+ kfree (port->probe_info[d].description);
+ }
+ }
+#endif
+
+ kfree(port->name);
+ kfree(port);
+}
+
+
+struct snx_parport *sunix_parport_get_port(struct snx_parport *port)
+{
+ atomic_inc(&port->ref_count);
+ return port;
+}
+
+
+void sunix_parport_put_port(struct snx_parport *port)
+{
+ if (atomic_dec_and_test(&port->ref_count)) {
+ sunix_free_port(port);
+ }
+ return;
+}
+
+
+struct snx_parport *sunix_parport_register_port(struct sunix_par_port *priv, struct snx_parport_ops *ops)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ struct list_head *l = NULL;
+#endif
+ struct snx_parport *tmp = NULL;
+ int num;
+ int device;
+ char *name;
+
+ if ((!priv) || (!ops)) {
+ return NULL;
+ }
+
+ tmp = kmalloc(sizeof(struct snx_parport), GFP_KERNEL);
+
+ if (!tmp) {
+ return NULL;
+ }
+
+
+ memset(tmp, 0, sizeof(struct snx_parport));
+
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ tmp->base = priv->base;
+ tmp->irq = priv->irq;
+
+ tmp->base_hi = priv->base_hi;
+
+ tmp->muxport = tmp->daisy = tmp->muxsel = -1;
+ tmp->modes = 0;
+
+ INIT_LIST_HEAD(&tmp->list);
+
+ tmp->devices = tmp->cad = NULL;
+ tmp->flags = 0;
+ tmp->ops = ops;
+ tmp->physport = tmp;
+
+ memset(tmp->probe_info, 0, 5 * sizeof (struct snx_parport_device_info));
+
+ rwlock_init(&tmp->cad_lock);
+ spin_lock_init(&tmp->waitlist_lock);
+ spin_lock_init(&tmp->pardevice_lock);
+ tmp->ieee1284.mode = IEEE1284_MODE_COMPAT;
+ tmp->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37))
+ sema_init(&tmp->ieee1284.irq, 0);
+#else
+ init_MUTEX_LOCKED(&tmp->ieee1284.irq);
+#endif
+
+
+ tmp->spintime = sunix_parport_default_spintime;
+
+ atomic_set(&tmp->ref_count, 1);
+
+ INIT_LIST_HEAD(&tmp->full_list);
+
+ name = kmalloc(20, GFP_KERNEL);
+ if (!name) {
+ return NULL;
+ }
+
+ spin_lock(&snx_full_list_lock);
+
+ for (l = snx_all_ports.next, num = 2; l != &snx_all_ports; l = l->next, num++) {
+ struct snx_parport *p = list_entry(l, struct snx_parport, full_list);
+
+ if (p->number != num) {
+ break;
+ }
+ }
+
+ tmp->portnum = tmp->number = num;
+
+ list_add_tail(&tmp->full_list, l);
+
+ spin_unlock(&snx_full_list_lock);
+
+
+ sprintf(name, "parport%d", tmp->portnum = tmp->number);
+ tmp->name = name;
+
+ for (device = 0; device < 5; device++) {
+ tmp->probe_info[device].class = PARPORT_CLASS_LEGACY;
+ }
+
+ tmp->waithead = tmp->waittail = NULL;
+#else
+
+ spin_lock_irq(&snx_parportlist_lock);
+ for (num = 2; ; num++) {
+ struct snx_parport *itr = snx_portlist;
+ while (itr) {
+ if (itr->number == num) {
+ break;
+ } else {
+ itr = itr->next;
+ }
+ }
+
+ if (itr == NULL) {
+ break;
+ }
+ }
+
+ spin_unlock_irq(&snx_parportlist_lock);
+
+ tmp->base = priv->base;
+ tmp->irq = priv->irq;
+ tmp->base_hi = priv->base_hi;
+
+ tmp->muxport = tmp->daisy = tmp->muxsel = -1;
+ tmp->modes = 0;
+ tmp->next = NULL;
+ tmp->devices = tmp->cad = NULL;
+ tmp->flags = 0;
+ tmp->ops = ops;
+ tmp->portnum = tmp->number = num;
+ tmp->physport = tmp;
+
+ memset (tmp->probe_info, 0, 5 * sizeof (struct snx_parport_device_info));
+
+ tmp->cad_lock = RW_LOCK_UNLOCKED;
+ spin_lock_init(&tmp->waitlist_lock);
+ spin_lock_init(&tmp->pardevice_lock);
+ tmp->ieee1284.mode = IEEE1284_MODE_COMPAT;
+ tmp->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37))
+ sema_init(&tmp->ieee1284.irq, 0);
+#else
+ init_MUTEX_LOCKED (&tmp->ieee1284.irq);
+#endif
+
+ tmp->spintime = sunix_parport_default_spintime;
+
+ atomic_set(&tmp->ref_count, 1);
+
+ name = kmalloc(20, GFP_KERNEL);
+ if (!name) {
+ kfree(tmp);
+ return NULL;
+ }
+
+ sprintf(name, "parport%d", num);
+ tmp->name = name;
+
+ spin_lock(&snx_parportlist_lock);
+
+ if (snx_portlist_tail) {
+ snx_portlist_tail->next = tmp;
+ }
+
+ snx_portlist_tail = tmp;
+
+ if (!snx_portlist) {
+ snx_portlist = tmp;
+ }
+ spin_unlock(&snx_parportlist_lock);
+
+ for (device = 0; device < 5; device++) {
+ tmp->probe_info[device].class = PARPORT_CLASS_LEGACY;
+ }
+
+ tmp->waithead = tmp->waittail = NULL;
+#endif
+
+ return tmp;
+}
+
+
+void sunix_parport_announce_port(struct snx_parport *port)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ int i;
+
+ down(&snx_registration_lock);
+
+ spin_lock_irq(&snx_parportlist_lock);
+
+ list_add_tail(&port->list, &snx_portlist);
+
+ for (i = 1; i < 3; i++) {
+ struct snx_parport *slave = port->slaves[i-1];
+
+ if (slave) {
+ list_add_tail(&slave->list, &snx_portlist);
+ }
+ }
+ spin_unlock_irq(&snx_parportlist_lock);
+
+ sunix_attach_driver_chain(port);
+
+ for (i = 1; i < 3; i++) {
+ struct snx_parport *slave = port->slaves[i-1];
+
+ if (slave) {
+ sunix_attach_driver_chain(slave);
+ }
+ }
+
+ up(&snx_registration_lock);
+#else
+
+ sunix_attach_driver_chain(port);
+#endif
+}
+
+
+void sunix_parport_remove_port(struct snx_parport *port)
+{
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ int i;
+
+ down(&snx_registration_lock);
+
+ sunix_detach_driver_chain(port);
+
+ port->ops = &sunix_dead_ops;
+ spin_lock(&snx_parportlist_lock);
+ list_del_init(&port->list);
+
+ for (i = 1; i < 3; i++) {
+ struct snx_parport *slave = port->slaves[i-1];
+ if (slave) {
+ list_del_init(&slave->list);
+ }
+ }
+
+ spin_unlock(&snx_parportlist_lock);
+
+ up(&snx_registration_lock);
+
+ for (i = 1; i < 3; i++) {
+ struct snx_parport *slave = port->slaves[i-1];
+ if (slave) {
+ sunix_parport_put_port(slave);
+ }
+ }
+
+#else
+
+ struct snx_parport *p;
+
+ port->ops = &sunix_dead_ops;
+
+ sunix_detach_driver_chain(port);
+
+ spin_lock(&snx_parportlist_lock);
+
+ if (snx_portlist == port) {
+ //if ((snx_portlist = port->next) == NULL) {
+ snx_portlist = port->next;
+ if (snx_portlist == NULL) {
+ snx_portlist_tail = NULL;
+ }
+ } else {
+ for (p = snx_portlist; (p != NULL) && (p->next != port); p = p->next)
+ ;
+ if (p) {
+ //if ((p->next = port->next) == NULL) {
+ p->next = port->next;
+ if (p->next == NULL) {
+ snx_portlist_tail = p;
+ }
+ } else {
+ printk("SNX Warng: %s not found in port list!\n", port->name);
+ }
+ }
+ spin_unlock(&snx_parportlist_lock);
+
+ sunix_parport_put_port(port);
+#endif
+}
+
+
+struct snx_pardevice *sunix_parport_register_device(
+ struct snx_parport *port,
+ const char *name,
+ int (*pf)(void *),
+ void (*kf)(void *),
+ void (*irq_func)(int, void *, struct pt_regs *),
+ int flags,
+ void *handle
+ )
+{
+ struct snx_pardevice *tmp;
+
+ if (port->physport->flags & PARPORT_FLAG_EXCL) {
+ printk("SNX Warng: %s no more devices allowed\n", port->name);
+ return NULL;
+ }
+
+ if (flags & PARPORT_DEV_LURK) {
+ if (!pf || !kf) {
+ printk("SNX Error: %s refused to register lurking device (%s) without callbacks\n", port->name, name);
+ return NULL;
+ }
+ }
+
+ sunix_parport_get_port(port);
+
+ tmp = kmalloc(sizeof(struct snx_pardevice), GFP_KERNEL);
+ if (tmp == NULL) {
+ printk("SNX Error: %s memory squeeze, couldn't register %s.\n", port->name, name);
+ goto out;
+ }
+
+ tmp->state = kmalloc(sizeof(struct snx_parport_state), GFP_KERNEL);
+ if (tmp->state == NULL) {
+ printk("SNX Error: %s memory squeeze, couldn't register %s.\n", port->name, name);
+ goto out_free_pardevice;
+ }
+
+ tmp->name = name;
+ tmp->port = port;
+ tmp->daisy = -1;
+ tmp->preempt = pf;
+ tmp->wakeup = kf;
+ tmp->private = handle;
+ tmp->flags = flags;
+ tmp->irq_func = irq_func;
+ tmp->waiting = 0;
+ tmp->timeout = 5 * HZ;
+
+ tmp->prev = NULL;
+
+ spin_lock(&port->physport->pardevice_lock);
+
+ if (flags & PARPORT_DEV_EXCL) {
+ if (port->physport->devices) {
+ spin_unlock(&port->physport->pardevice_lock);
+ printk("SNX Error: %s cannot grant exclusive access for device %s\n", port->name, name);
+ goto out_free_all;
+ }
+ port->flags |= PARPORT_FLAG_EXCL;
+ }
+
+ tmp->next = port->physport->devices;
+ wmb();
+
+ if (port->physport->devices) {
+ port->physport->devices->prev = tmp;
+ }
+
+ port->physport->devices = tmp;
+ spin_unlock(&port->physport->pardevice_lock);
+
+ init_waitqueue_head(&tmp->wait_q);
+ tmp->timeslice = sunix_parport_default_timeslice;
+ tmp->waitnext = tmp->waitprev = NULL;
+
+ port->ops->init_state(tmp, tmp->state);
+ return tmp;
+
+out_free_all:
+ kfree(tmp->state);
+
+out_free_pardevice:
+ kfree(tmp);
+
+out:
+ sunix_parport_put_port(port);
+
+ return NULL;
+}
+
+
+void sunix_parport_unregister_device(struct snx_pardevice *dev)
+{
+ struct snx_parport *port;
+
+ if (dev == NULL) {
+ return;
+ }
+
+ port = dev->port->physport;
+
+ if (port->cad == dev) {
+ printk("SNX Warng: %s, %s forgot to release port\n", port->name, dev->name);
+ sunix_parport_release(dev);
+ }
+
+ spin_lock(&port->pardevice_lock);
+ if (dev->next) {
+ dev->next->prev = dev->prev;
+ }
+
+ if (dev->prev) {
+ dev->prev->next = dev->next;
+ } else {
+ port->devices = dev->next;
+ }
+
+ if (dev->flags & PARPORT_DEV_EXCL) {
+ port->flags &= ~PARPORT_FLAG_EXCL;
+ }
+
+ spin_unlock(&port->pardevice_lock);
+
+ spin_lock (&port->waitlist_lock);
+ if (dev->waitprev || dev->waitnext || port->waithead == dev) {
+ if (dev->waitprev) {
+ dev->waitprev->waitnext = dev->waitnext;
+ } else {
+ port->waithead = dev->waitnext;
+ }
+
+
+ if (dev->waitnext) {
+ dev->waitnext->waitprev = dev->waitprev;
+ } else {
+ port->waittail = dev->waitprev;
+ }
+ }
+
+ spin_unlock(&port->waitlist_lock);
+
+ kfree(dev->state);
+ kfree(dev);
+
+ sunix_parport_put_port(port);
+}
+
+
+struct snx_parport *sunix_parport_find_number(int number)
+{
+ struct snx_parport *port, *result = NULL;
+
+ spin_lock(&snx_parportlist_lock);
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ list_for_each_entry(port, &snx_portlist, list) {
+ if (port->number == number) {
+ result = sunix_parport_get_port(port);
+ break;
+ }
+ }
+#else
+ for (port = snx_portlist; port; port = port->next) {
+ if (port->number == number) {
+ result = sunix_parport_get_port(port);
+ break;
+ }
+ }
+
+#endif
+ spin_unlock(&snx_parportlist_lock);
+ return result;
+}
+
+
+struct snx_parport *sunix_parport_find_base(unsigned long base)
+{
+ struct snx_parport *port, *result = NULL;
+
+ spin_lock(&snx_parportlist_lock);
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+ list_for_each_entry(port, &snx_portlist, list) {
+ if (port->base == base) {
+ result = sunix_parport_get_port(port);
+ break;
+ }
+ }
+#else
+ for (port = snx_portlist; port; port = port->next) {
+ if (port->base == base) {
+ result = sunix_parport_get_port(port);
+ break;
+ }
+ }
+#endif
+ spin_unlock(&snx_parportlist_lock);
+
+ return result;
+}
+
+
+int sunix_parport_claim(struct snx_pardevice *dev)
+{
+ struct snx_pardevice *oldcad;
+ struct snx_parport *port = dev->port->physport;
+ unsigned long flags;
+
+ if (port->cad == dev) {
+ printk("SNX Info : %s, %s already owner\n", dev->port->name, dev->name);
+ return 0;
+ }
+
+ write_lock_irqsave(&port->cad_lock, flags);
+ //if ((oldcad = port->cad) != NULL) {
+ oldcad = port->cad;
+ if (oldcad != NULL) {
+ if (oldcad->preempt) {
+ if (oldcad->preempt(oldcad->private)) {
+ goto blocked;
+ }
+
+ port->ops->save_state(port, dev->state);
+ } else {
+ goto blocked;
+ }
+
+ if (port->cad != oldcad) {
+ printk("SNX Error: %s, %s released port when preempted!\n", port->name, oldcad->name);
+ if (port->cad) {
+ goto blocked;
+ }
+ }
+ }
+
+ if (dev->waiting & 1) {
+ dev->waiting = 0;
+
+ spin_lock_irq(&port->waitlist_lock);
+
+ if (dev->waitprev) {
+ dev->waitprev->waitnext = dev->waitnext;
+ } else {
+ port->waithead = dev->waitnext;
+ }
+
+
+ if (dev->waitnext) {
+ dev->waitnext->waitprev = dev->waitprev;
+ } else {
+ port->waittail = dev->waitprev;
+ }
+
+ spin_unlock_irq(&port->waitlist_lock);
+ dev->waitprev = dev->waitnext = NULL;
+ }
+
+ port->cad = dev;
+
+ port->ops->restore_state(port, dev->state);
+ write_unlock_irqrestore(&port->cad_lock, flags);
+ dev->time = jiffies;
+
+ return 0;
+
+blocked:
+ if (dev->waiting & 2 || dev->wakeup) {
+ spin_lock (&port->waitlist_lock);
+ if (test_and_set_bit(0, &dev->waiting) == 0) {
+ dev->waitnext = NULL;
+ dev->waitprev = port->waittail;
+ if (port->waittail) {
+ port->waittail->waitnext = dev;
+ port->waittail = dev;
+ } else {
+ port->waithead = port->waittail = dev;
+ }
+ }
+
+ spin_unlock(&port->waitlist_lock);
+ }
+
+ write_unlock_irqrestore(&port->cad_lock, flags);
+ return -EAGAIN;
+}
+
+
+int sunix_parport_claim_or_block(struct snx_pardevice *dev)
+{
+ int r;
+ dev->waiting = 2;
+
+ r = sunix_parport_claim(dev);
+
+ if (r == -EAGAIN) {
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ unsigned long flags;
+#endif
+ printk("SNX Warng: %s sunix_parport_claim() returned -EAGAIN\n", dev->name);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ save_flags (flags);
+ cli();
+#endif
+ if (dev->waiting) {
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0))
+ wait_event_interruptible(dev->wait_q, !dev->waiting);
+#else
+ interruptible_sleep_on(&dev->wait_q);
+#endif
+
+ if (signal_pending(current)) {
+ return -EINTR;
+ }
+ r = 1;
+ } else {
+ r = 0;
+ printk("SNX Warng: %s, didn't sleep in sunix_parport_claim_or_block()\n", dev->name);
+ }
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0))
+ restore_flags(flags);
+#endif
+ if (dev->port->physport->cad != dev) {
+ printk("SNX Warng: %s, exiting sunix_parport_claim_or_block but %s owns port!\n",
+ dev->name,
+ dev->port->physport->cad ? dev->port->physport->cad->name:"nobody"
+ );
+ }
+ }
+ dev->waiting = 0;
+
+ return r;
+}
+
+
+void sunix_parport_release(struct snx_pardevice *dev)
+{
+ struct snx_parport *port = dev->port->physport;
+ struct snx_pardevice *pd;
+ unsigned long flags;
+
+ write_lock_irqsave(&port->cad_lock, flags);
+ if (port->cad != dev) {
+ write_unlock_irqrestore(&port->cad_lock, flags);
+ printk("SNX Warng: %s, %s tried to release parport when not owner\n", port->name, dev->name);
+ return;
+ }
+
+ port->cad = NULL;
+ write_unlock_irqrestore(&port->cad_lock, flags);
+
+ port->ops->save_state(port, dev->state);
+
+ for (pd = port->waithead; pd; pd = pd->waitnext) {
+ if (pd->waiting & 2) {
+ sunix_parport_claim(pd);
+ if (waitqueue_active(&pd->wait_q)) {
+ wake_up_interruptible(&pd->wait_q);
+ }
+
+ return;
+ } else if (pd->wakeup) {
+ pd->wakeup(pd->private);
+ if (dev->port->cad) {
+ return;
+ }
+ } else {
+ printk("SNX Warng: %s don't know how to wake %s\n", port->name, pd->name);
+ }
+ }
+
+ for (pd = port->devices; (port->cad == NULL) && pd; pd = pd->next) {
+ if (pd->wakeup && pd != dev) {
+ pd->wakeup(pd->private);
+ }
+ }
+}
+
--
2.17.1
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  Last update: 2019-02-27 08:19    [W:0.119 / U:15.360 seconds]
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