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Commit d022be21 authored by Martin Schwidefsky's avatar Martin Schwidefsky Committed by Linus Torvalds
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[PATCH] s390: 3215 driver. 

Convert 3215 console driver to new channel subsystem driver

this adds support for the driver model to the 3215 driver. The console
is one of the biggest problems because the regular device detection
is now done at initcall time although we actually want full
support for channel attached console devices as early as possible.
con3215_init() now uses a special ccw_device_probe_console() function
to do an early initialization of a single device.

The main backdraw for users is that the console can no longer
be autodetected when not running under VM. LPAR or P390 users
with a channel attached console now have to specify
console_device=f00 as a kernel parameter.

Authors:
	Martin Schwidefsky <schwidefsky@de.ibm.com>
	Arnd Bergmann <arndb@de.ibm.com>
parent 49a09376
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Showing with 493 additions and 447 deletions
drivers/char/tty_io.c
View file @ d022be21
......@@ -2222,7 +2222,7 @@ void __init console_init(void)
#ifdef CONFIG_TN3270_CONSOLE
tub3270_con_init();
#endif
#ifdef CONFIG_TN3215
#ifdef CONFIG_TN3215_CONSOLE
con3215_init();
#endif
#ifdef CONFIG_SCLP_CONSOLE
......@@ -2363,10 +2363,7 @@ void __init tty_init(void)
#ifdef CONFIG_TN3270
tub3270_init();
#endif
#ifdef CONFIG_TN3215
tty3215_init();
#endif
#ifdef CONFIG_SCLP
#ifdef CONFIG_SCLP_TTY
sclp_tty_init();
#endif
#ifdef CONFIG_A2232
......
drivers/s390/char/con3215.c
View file @ d022be21
......@@ -12,6 +12,7 @@
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kdev_t.h>
#include <linux/tty.h>
......@@ -22,14 +23,14 @@
#include <linux/slab.h>
#include <linux/bootmem.h>
#include <linux/devfs_fs_kernel.h>
#include <asm/ccwdev.h>
#include <asm/cio.h>
#include <asm/io.h>
#include <asm/ebcdic.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/cpcmd.h>
#include <asm/irq.h>
#include <asm/setup.h>
#include "ctrlchar.h"
......@@ -53,56 +54,58 @@
#define RAW3215_CLOSING 32 /* set while in close process */
#define RAW3215_TIMER_RUNS 64 /* set if the output delay timer is on */
#define RAW3215_FLUSHING 128 /* set to flush buffer (no delay) */
#define RAW3215_BH_PENDING 256 /* indication for bh scheduling */
#define TAB_STOP_SIZE 8 /* tab stop size */
struct _raw3215_info; /* forward declaration ... */
/*
* Request types for a 3215 device
*/
typedef enum {
enum raw3215_type {
RAW3215_FREE, RAW3215_READ, RAW3215_WRITE
} raw3215_type;
};
/*
* Request structure for a 3215 device
*/
typedef struct _raw3215_req {
raw3215_type type; /* type of the request */
struct raw3215_req {
enum raw3215_type type; /* type of the request */
int start, len; /* start index & len in output buffer */
int delayable; /* indication to wait for more data */
int residual; /* residual count for read request */
ccw1_t ccws[RAW3215_NR_CCWS]; /* space for the channel program */
struct _raw3215_info *info; /* pointer to main structure */
struct _raw3215_req *next; /* pointer to next request */
} raw3215_req __attribute__ ((aligned(8)));
typedef struct _raw3215_info {
struct ccw1 ccws[RAW3215_NR_CCWS]; /* space for the channel program */
struct raw3215_info *info; /* pointer to main structure */
struct raw3215_req *next; /* pointer to next request */
} __attribute__ ((aligned(8)));
struct raw3215_info {
struct ccw_device *cdev; /* device for tty driver */
spinlock_t *lock; /* pointer to irq lock */
int flags; /* state flags */
int irq; /* interrupt number to do_IO */
char *buffer; /* pointer to output buffer */
char *inbuf; /* pointer to input buffer */
int head; /* first free byte in output buffer */
int count; /* number of bytes in output buffer */
int written; /* number of bytes in write requests */
devstat_t devstat; /* device status structure for do_IO */
struct tty_struct *tty; /* pointer to tty structure if present */
struct tasklet_struct tasklet;
raw3215_req *queued_read; /* pointer to queued read requests */
raw3215_req *queued_write; /* pointer to queued write requests */
struct raw3215_req *queued_read; /* pointer to queued read requests */
struct raw3215_req *queued_write;/* pointer to queued write requests */
wait_queue_head_t empty_wait; /* wait queue for flushing */
struct timer_list timer; /* timer for delayed output */
char *message; /* pending message from raw3215_irq */
int msg_dstat; /* dstat for pending message */
int msg_cstat; /* cstat for pending message */
int line_pos; /* position on the line (for tabs) */
} raw3215_info;
};
static raw3215_info *raw3215[NR_3215]; /* array of 3215 devices structures */
static raw3215_req *raw3215_freelist; /* list of free request structures */
static spinlock_t raw3215_freelist_lock;/* spinlock to protect free list */
/* array of 3215 devices structures */
static struct raw3215_info *raw3215[NR_3215];
/* spinlock to protect the raw3215 array */
static spinlock_t raw3215_device_lock = SPIN_LOCK_UNLOCKED;
/* list of free request structures */
static struct raw3215_req *raw3215_freelist;
/* spinlock to protect free list */
static spinlock_t raw3215_freelist_lock;
static struct tty_driver tty3215_driver;
static struct tty_struct *tty3215_table[NR_3215];
......@@ -110,15 +113,12 @@ static struct termios *tty3215_termios[NR_3215];
static struct termios *tty3215_termios_locked[NR_3215];
static int tty3215_refcount;
#ifndef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
/*
* Get a request structure from the free list
*/
extern inline raw3215_req *raw3215_alloc_req(void) {
raw3215_req *req;
static inline struct raw3215_req *
raw3215_alloc_req(void) {
struct raw3215_req *req;
unsigned long flags;
spin_lock_irqsave(&raw3215_freelist_lock, flags);
......@@ -131,7 +131,8 @@ extern inline raw3215_req *raw3215_alloc_req(void) {
/*
* Put a request structure back to the free list
*/
extern inline void raw3215_free_req(raw3215_req *req) {
static inline void
raw3215_free_req(struct raw3215_req *req) {
unsigned long flags;
if (req->type == RAW3215_FREE)
......@@ -149,10 +150,11 @@ extern inline void raw3215_free_req(raw3215_req *req) {
* because a 3215 terminal won't accept a new read before the old one is
* completed.
*/
static void raw3215_mk_read_req(raw3215_info *raw)
static void
raw3215_mk_read_req(struct raw3215_info *raw)
{
raw3215_req *req;
ccw1_t *ccw;
struct raw3215_req *req;
struct ccw1 *ccw;
/* there can only be ONE read request at a time */
req = raw->queued_read;
......@@ -177,10 +179,11 @@ static void raw3215_mk_read_req(raw3215_info *raw)
* buffer to the 3215 device. If a queued write exists it is replaced by
* the new, probably lengthened request.
*/
static void raw3215_mk_write_req(raw3215_info *raw)
static void
raw3215_mk_write_req(struct raw3215_info *raw)
{
raw3215_req *req;
ccw1_t *ccw;
struct raw3215_req *req;
struct ccw1 *ccw;
int len, count, ix, lines;
if (raw->count <= raw->written)
......@@ -253,9 +256,10 @@ static void raw3215_mk_write_req(raw3215_info *raw)
/*
* Start a read or a write request
*/
static void raw3215_start_io(raw3215_info *raw)
static void
raw3215_start_io(struct raw3215_info *raw)
{
raw3215_req *req;
struct raw3215_req *req;
int res;
req = raw->queued_read;
......@@ -263,7 +267,8 @@ static void raw3215_start_io(raw3215_info *raw)
!(raw->flags & (RAW3215_WORKING | RAW3215_THROTTLED))) {
/* dequeue request */
raw->queued_read = NULL;
res = do_IO(raw->irq, req->ccws, (unsigned long) req, 0, 0);
res = ccw_device_start(raw->cdev, req->ccws,
(unsigned long) req, 0, 0);
if (res != 0) {
/* do_IO failed, put request back to queue */
raw->queued_read = req;
......@@ -276,7 +281,8 @@ static void raw3215_start_io(raw3215_info *raw)
!(raw->flags & (RAW3215_WORKING | RAW3215_STOPPED))) {
/* dequeue request */
raw->queued_write = NULL;
res = do_IO(raw->irq, req->ccws, (unsigned long) req, 0, 0);
res = ccw_device_start(raw->cdev, req->ccws,
(unsigned long) req, 0, 0);
if (res != 0) {
/* do_IO failed, put request back to queue */
raw->queued_write = req;
......@@ -289,19 +295,20 @@ static void raw3215_start_io(raw3215_info *raw)
/*
* Function to start a delayed output after RAW3215_TIMEOUT seconds
*/
static void raw3215_timeout(unsigned long __data)
static void
raw3215_timeout(unsigned long __data)
{
raw3215_info *raw = (raw3215_info *) __data;
struct raw3215_info *raw = (struct raw3215_info *) __data;
unsigned long flags;
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
if (raw->flags & RAW3215_TIMER_RUNS) {
del_timer(&raw->timer);
raw->flags &= ~RAW3215_TIMER_RUNS;
raw3215_mk_write_req(raw);
raw3215_start_io(raw);
}
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
/*
......@@ -310,7 +317,8 @@ static void raw3215_timeout(unsigned long __data)
* amount of data is bigger than RAW3215_MIN_WRITE. If a write is not
* done immediatly a timer is started with a delay of RAW3215_TIMEOUT.
*/
extern inline void raw3215_try_io(raw3215_info *raw)
static inline void
raw3215_try_io(struct raw3215_info *raw)
{
if (!(raw->flags & RAW3215_ACTIVE))
return;
......@@ -341,21 +349,21 @@ extern inline void raw3215_try_io(raw3215_info *raw)
* The bottom half handler routine for 3215 devices. It tries to start
* the next IO and wakes up processes waiting on the tty.
*/
static void raw3215_tasklet(void *data)
static void
raw3215_tasklet(void *data)
{
raw3215_info *raw;
struct raw3215_info *raw;
struct tty_struct *tty;
unsigned long flags;
raw = (raw3215_info *) data;
s390irq_spin_lock_irqsave(raw->irq, flags);
raw = (struct raw3215_info *) data;
spin_lock_irqsave(raw->lock, flags);
raw3215_mk_write_req(raw);
raw3215_try_io(raw);
raw->flags &= ~RAW3215_BH_PENDING;
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
/* Check for pending message from raw3215_irq */
if (raw->message != NULL) {
printk(raw->message, raw->irq, raw->msg_dstat, raw->msg_cstat);
printk(raw->message, raw->msg_dstat, raw->msg_cstat);
raw->message = NULL;
}
tty = raw->tty;
......@@ -369,57 +377,28 @@ static void raw3215_tasklet(void *data)
}
/*
* Interrupt routine, called from common io layer
*/
static inline void raw3215_sched_tasklet(raw3215_info *raw)
{
if (raw->flags & RAW3215_BH_PENDING)
return; /* already pending */
raw->flags |= RAW3215_BH_PENDING;
tasklet_hi_schedule(&raw->tasklet);
}
/*
* Find the raw3215_info structure associated with irq
*/
static inline raw3215_info *raw3215_find_info(int irq) {
raw3215_info *raw;
int i;
for (i = 0; i < NR_3215; i++) {
raw = raw3215[i];
if (raw != NULL && raw->irq == irq &&
(raw->flags & RAW3215_ACTIVE))
break;
}
return (i >= NR_3215) ? NULL : raw;
}
/*
* Interrupt routine, called from Ingo's I/O layer
*/
static void raw3215_irq(int irq, void *int_parm, struct pt_regs *regs)
static void
raw3215_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
{
raw3215_info *raw;
raw3215_req *req;
struct raw3215_info *raw;
struct raw3215_req *req;
struct tty_struct *tty;
devstat_t *stat;
int cstat, dstat;
int count, slen;
stat = (devstat_t *) int_parm;
req = (raw3215_req *) stat->intparm;
cstat = stat->cstat;
dstat = stat->dstat;
raw = cdev->dev.driver_data;
req = (struct raw3215_req *) intparm;
cstat = irb->scsw.cstat;
dstat = irb->scsw.dstat;
if (cstat != 0) {
raw = raw3215_find_info(irq);
if (raw != NULL) {
raw->message = KERN_WARNING
"Got nonzero channel status in raw3215_irq "
"(dev %i, dev sts 0x%2x, sch sts 0x%2x)";
"(dev sts 0x%2x, sch sts 0x%2x)";
raw->msg_dstat = dstat;
raw->msg_cstat = cstat;
raw3215_sched_tasklet(raw);
}
tasklet_schedule(&raw->tasklet);
}
if (dstat & 0x01) { /* we got a unit exception */
dstat &= ~0x01; /* we can ignore it */
......@@ -429,13 +408,10 @@ static void raw3215_irq(int irq, void *int_parm, struct pt_regs *regs)
if (cstat != 0)
break;
/* Attention interrupt, someone hit the enter key */
if ((raw = raw3215_find_info(irq)) == NULL)
return; /* That shouldn't happen ... */
/* Setup a read request */
raw3215_mk_read_req(raw);
if (MACHINE_IS_P390)
memset(raw->inbuf, 0, RAW3215_INBUF_SIZE);
raw3215_sched_tasklet(raw);
tasklet_schedule(&raw->tasklet);
break;
case 0x08:
case 0x0C:
......@@ -444,7 +420,7 @@ static void raw3215_irq(int irq, void *int_parm, struct pt_regs *regs)
return; /* That shouldn't happen ... */
if (req->type == RAW3215_READ) {
/* store residual count, then wait for device end */
req->residual = stat->rescnt;
req->residual = irb->scsw.count;
}
if (dstat == 0x08)
break;
......@@ -500,7 +476,6 @@ static void raw3215_irq(int irq, void *int_parm, struct pt_regs *regs)
raw->count -= req->len;
raw->written -= req->len;
}
raw->flags &= ~RAW3215_WORKING;
raw3215_free_req(req);
/* check for empty wait */
......@@ -509,13 +484,10 @@ static void raw3215_irq(int irq, void *int_parm, struct pt_regs *regs)
raw->queued_read == NULL) {
wake_up_interruptible(&raw->empty_wait);
}
raw3215_sched_tasklet(raw);
tasklet_schedule(&raw->tasklet);
break;
default:
/* Strange interrupt, I'll do my best to clean up */
if ((raw = raw3215_find_info(irq)) == NULL)
return; /* That shouldn't happen ... */
if (raw == NULL) break;
if (req != NULL && req->type != RAW3215_FREE) {
if (req->type == RAW3215_WRITE) {
raw->count -= req->len;
......@@ -526,10 +498,10 @@ static void raw3215_irq(int irq, void *int_parm, struct pt_regs *regs)
}
raw->message = KERN_WARNING
"Spurious interrupt in in raw3215_irq "
"(dev %i, dev sts 0x%2x, sch sts 0x%2x)";
"(dev sts 0x%2x, sch sts 0x%2x)";
raw->msg_dstat = dstat;
raw->msg_cstat = cstat;
raw3215_sched_tasklet(raw);
tasklet_schedule(&raw->tasklet);
}
return;
}
......@@ -539,7 +511,8 @@ static void raw3215_irq(int irq, void *int_parm, struct pt_regs *regs)
* Has to be called with the s390irq lock held. Can be called
* disabled.
*/
static void raw3215_make_room(raw3215_info *raw, unsigned int length)
static void
raw3215_make_room(struct raw3215_info *raw, unsigned int length)
{
while (RAW3215_BUFFER_SIZE - raw->count < length) {
/* there might be a request pending */
......@@ -547,18 +520,16 @@ static void raw3215_make_room(raw3215_info *raw, unsigned int length)
raw3215_mk_write_req(raw);
raw3215_try_io(raw);
raw->flags &= ~RAW3215_FLUSHING;
if (wait_cons_dev(raw->irq) != 0) {
/* that shouldn't happen */
raw->count = 0;
raw->written = 0;
}
#ifdef CONFIG_TN3215_CONSOLE
wait_cons_dev();
#endif
/* Enough room freed up ? */
if (RAW3215_BUFFER_SIZE - raw->count >= length)
break;
/* there might be another cpu waiting for the lock */
s390irq_spin_unlock(raw->irq);
spin_unlock(raw->lock);
udelay(100);
s390irq_spin_lock(raw->irq);
spin_lock(raw->lock);
}
}
......@@ -566,7 +537,7 @@ static void raw3215_make_room(raw3215_info *raw, unsigned int length)
* String write routine for 3215 devices
*/
static int
raw3215_write(raw3215_info *raw, const char *str,
raw3215_write(struct raw3215_info *raw, const char *str,
int from_user, unsigned int length)
{
unsigned long flags;
......@@ -575,7 +546,7 @@ raw3215_write(raw3215_info *raw, const char *str,
ret = 0;
while (length > 0) {
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
count = (length > RAW3215_BUFFER_SIZE) ?
RAW3215_BUFFER_SIZE : length;
length -= count;
......@@ -585,8 +556,8 @@ raw3215_write(raw3215_info *raw, const char *str,
/* copy string to output buffer and convert it to EBCDIC */
if (from_user) {
while (1) {
c = MIN(count,
MIN(RAW3215_BUFFER_SIZE - raw->count,
c = min_t(int, count,
min(RAW3215_BUFFER_SIZE - raw->count,
RAW3215_BUFFER_SIZE - raw->head));
if (c <= 0)
break;
......@@ -608,8 +579,8 @@ raw3215_write(raw3215_info *raw, const char *str,
}
} else {
while (1) {
c = MIN(count,
MIN(RAW3215_BUFFER_SIZE - raw->count,
c = min_t(int, count,
min(RAW3215_BUFFER_SIZE - raw->count,
RAW3215_BUFFER_SIZE - raw->head));
if (c <= 0)
break;
......@@ -629,7 +600,7 @@ raw3215_write(raw3215_info *raw, const char *str,
/* start or queue request */
raw3215_try_io(raw);
}
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
return ret;
......@@ -638,13 +609,13 @@ raw3215_write(raw3215_info *raw, const char *str,
/*
* Put character routine for 3215 devices
*/
static void raw3215_putchar(raw3215_info *raw, unsigned char ch)
static void
raw3215_putchar(struct raw3215_info *raw, unsigned char ch)
{
unsigned long flags;
unsigned int length, i;
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
if (ch == '\t') {
length = TAB_STOP_SIZE - (raw->line_pos%TAB_STOP_SIZE);
raw->line_pos += length;
......@@ -668,43 +639,42 @@ static void raw3215_putchar(raw3215_info *raw, unsigned char ch)
/* start or queue request */
raw3215_try_io(raw);
}
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
/*
* Flush routine, it simply sets the flush flag and tries to start
* pending IO.
*/
static void raw3215_flush_buffer(raw3215_info *raw)
static void
raw3215_flush_buffer(struct raw3215_info *raw)
{
unsigned long flags;
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
if (raw->count > 0) {
raw->flags |= RAW3215_FLUSHING;
raw3215_try_io(raw);
raw->flags &= ~RAW3215_FLUSHING;
}
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
/*
* Fire up a 3215 device.
*/
static int raw3215_startup(raw3215_info *raw)
static int
raw3215_startup(struct raw3215_info *raw)
{
unsigned long flags;
if (raw->flags & RAW3215_ACTIVE)
return 0;
if (s390_request_console_irq(raw->irq, raw3215_irq, SA_INTERRUPT,
"3215 terminal driver", &raw->devstat) != 0)
return -1;
raw->line_pos = 0;
raw->flags |= RAW3215_ACTIVE;
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
raw3215_try_io(raw);
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
return 0;
}
......@@ -712,7 +682,8 @@ static int raw3215_startup(raw3215_info *raw)
/*
* Shutdown a 3215 device.
*/
static void raw3215_shutdown(raw3215_info *raw)
static void
raw3215_shutdown(struct raw3215_info *raw)
{
DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
......@@ -720,59 +691,135 @@ static void raw3215_shutdown(raw3215_info *raw)
if (!(raw->flags & RAW3215_ACTIVE) || (raw->flags & RAW3215_FIXED))
return;
/* Wait for outstanding requests, then free irq */
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
if ((raw->flags & RAW3215_WORKING) ||
raw->queued_write != NULL ||
raw->queued_read != NULL) {
raw->flags |= RAW3215_CLOSING;
add_wait_queue(&raw->empty_wait, &wait);
#warning FIXME: use set_current_state instead of current->state=
current->state = TASK_INTERRUPTIBLE;
s390irq_spin_unlock_irqrestore(raw->irq, flags);
/* FIXME: what if schedule is interrupted by a signal,
* shouldn't we loop here? */
spin_unlock_irqrestore(raw->lock, flags);
schedule();
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
remove_wait_queue(&raw->empty_wait, &wait);
current->state = TASK_RUNNING;
raw->flags &= ~(RAW3215_ACTIVE | RAW3215_CLOSING);
}
free_irq(raw->irq, NULL);
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
static int
raw3215_find_dev(int number)
raw3215_probe (struct ccw_device *cdev)
{
s390_dev_info_t dinfo;
int irq;
int count;
struct raw3215_info *raw;
int line;
raw = kmalloc(sizeof(struct raw3215_info) +
RAW3215_INBUF_SIZE, GFP_KERNEL|GFP_DMA);
if (raw == NULL)
return -ENOMEM;
irq = get_irq_first();
count = 0;
while (count <= number && irq != -ENODEV) {
if (get_dev_info_by_irq(irq, &dinfo) == -ENODEV)
spin_lock(&raw3215_device_lock);
for (line = 0; line < NR_3215; line++) {
if (!raw3215[line]) {
raw3215[line] = raw;
break;
if (dinfo.devno == console_device ||
dinfo.sid_data.cu_type == 0x3215) {
count++;
if (count > number)
return irq;
}
irq = get_irq_next(irq);
}
return -1; /* console not found */
spin_unlock(&raw3215_device_lock);
if (line == NR_3215) {
kfree(raw);
return -ENODEV;
}
raw->cdev = cdev;
raw->lock = get_ccwdev_lock(cdev);
raw->inbuf = (char *) raw + sizeof(struct raw3215_info);
memset(raw, 0, sizeof(struct raw3215_info));
raw->buffer = (char *) kmalloc(RAW3215_BUFFER_SIZE,
GFP_KERNEL|GFP_DMA);
if (raw->buffer == NULL) {
spin_lock(&raw3215_device_lock);
raw3215[line] = 0;
spin_unlock(&raw3215_device_lock);
kfree(raw);
return -ENOMEM;
}
tasklet_init(&raw->tasklet,
(void (*)(unsigned long)) raw3215_tasklet,
(unsigned long) raw);
init_waitqueue_head(&raw->empty_wait);
cdev->dev.driver_data = raw;
cdev->handler = raw3215_irq;
return 0;
}
#ifdef CONFIG_TN3215_CONSOLE
static int
raw3215_remove (struct ccw_device *cdev)
{
struct raw3215_info *raw;
raw = cdev->dev.driver_data;
if (raw) {
cdev->dev.driver_data = NULL;
if (raw->buffer)
kfree(raw->buffer);
kfree(raw);
}
return 0;
}
static int
raw3215_set_online (struct ccw_device *cdev)
{
struct raw3215_info *raw;
raw = cdev->dev.driver_data;
if (!raw)
return -ENODEV;
return raw3215_startup(raw);
}
static int
raw3215_set_offline (struct ccw_device *cdev)
{
struct raw3215_info *raw;
raw = cdev->dev.driver_data;
if (!raw)
return -ENODEV;
raw3215_shutdown(raw);
return 0;
}
static struct ccw_device_id raw3215_id[] = {
{ CCW_DEVICE(0x3215, 0) },
{ /* end of list */ },
};
static struct ccw_driver raw3215_ccw_driver = {
.name = "3215",
.owner = THIS_MODULE,
.ids = raw3215_id,
.probe = &raw3215_probe,
.remove = &raw3215_remove,
.set_online = &raw3215_set_online,
.set_offline = &raw3215_set_offline,
};
#ifdef CONFIG_TN3215_CONSOLE
/*
* Write a string to the 3215 console
*/
static void
con3215_write(struct console *co, const char *str, unsigned int count)
{
raw3215_info *raw;
struct raw3215_info *raw;
int i;
if (count <= 0)
......@@ -793,7 +840,8 @@ con3215_write(struct console *co, const char *str, unsigned int count)
}
}
static kdev_t con3215_device(struct console *c)
static kdev_t
con3215_device(struct console *c)
{
return mk_kdev(TTY_MAJOR, c->index + 64 );
}
......@@ -802,18 +850,20 @@ static kdev_t con3215_device(struct console *c)
* panic() calls console_unblank before the system enters a
* disabled, endless loop.
*/
static void con3215_unblank(void)
static void
con3215_unblank(void)
{
raw3215_info *raw;
struct raw3215_info *raw;
unsigned long flags;
raw = raw3215[0]; /* console 3215 is the first one */
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
raw3215_make_room(raw, RAW3215_BUFFER_SIZE);
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
static int __init con3215_consetup(struct console *co, char *options)
static int __init
con3215_consetup(struct console *co, char *options)
{
return 0;
}
......@@ -830,6 +880,68 @@ static struct console con3215 = {
.flags = CON_PRINTBUFFER,
};
/*
* 3215 console initialization code called from console_init().
* NOTE: This is called before kmalloc is available.
*/
void __init
con3215_init(void)
{
struct ccw_device *cdev;
struct raw3215_info *raw;
struct raw3215_req *req;
int i;
/* Check if 3215 is to be the console */
if (!CONSOLE_IS_3215)
return;
/* Set the console mode for VM */
if (MACHINE_IS_VM) {
cpcmd("TERM CONMODE 3215", NULL, 0);
cpcmd("TERM AUTOCR OFF", NULL, 0);
}
/* allocate 3215 request structures */
raw3215_freelist = NULL;
spin_lock_init(&raw3215_freelist_lock);
for (i = 0; i < NR_3215_REQ; i++) {
req = (struct raw3215_req *) alloc_bootmem_low(sizeof(struct raw3215_req));
req->next = raw3215_freelist;
raw3215_freelist = req;
}
cdev = ccw_device_probe_console();
if (!cdev)
return;
raw3215[0] = raw = (struct raw3215_info *)
alloc_bootmem_low(sizeof(struct raw3215_info));
memset(raw, 0, sizeof(struct raw3215_info));
raw->buffer = (char *) alloc_bootmem_low(RAW3215_BUFFER_SIZE);
raw->inbuf = (char *) alloc_bootmem_low(RAW3215_INBUF_SIZE);
raw->cdev = cdev;
raw->lock = get_ccwdev_lock(cdev);
cdev->dev.driver_data = raw;
cdev->handler = raw3215_irq;
raw->flags |= RAW3215_FIXED;
tasklet_init(&raw->tasklet,
(void (*)(unsigned long)) raw3215_tasklet,
(unsigned long) raw);
init_waitqueue_head(&raw->empty_wait);
/* Request the console irq */
if (raw3215_startup(raw) != 0) {
free_bootmem((unsigned long) raw->inbuf, RAW3215_INBUF_SIZE);
free_bootmem((unsigned long) raw->buffer, RAW3215_BUFFER_SIZE);
free_bootmem((unsigned long) raw, sizeof(struct raw3215_info));
raw3215[0] = NULL;
printk("Couldn't find a 3215 console device\n");
return;
}
register_console(&con3215);
}
#endif
/*
......@@ -837,9 +949,10 @@ static struct console con3215 = {
*
* This routine is called whenever a 3215 tty is opened.
*/
static int tty3215_open(struct tty_struct *tty, struct file * filp)
static int
tty3215_open(struct tty_struct *tty, struct file * filp)
{
raw3215_info *raw;
struct raw3215_info *raw;
int retval, line;
line = minor(tty->device) - tty->driver.minor_start;
......@@ -847,27 +960,8 @@ static int tty3215_open(struct tty_struct *tty, struct file * filp)
return -ENODEV;
raw = raw3215[line];
if (raw == NULL) {
raw = kmalloc(sizeof(raw3215_info) +
RAW3215_INBUF_SIZE, GFP_KERNEL|GFP_DMA);
if (raw == NULL)
return -ENOMEM;
raw->irq = raw3215_find_dev(line);
if (raw->irq == -1) {
kfree(raw);
return -ENODEV;
}
raw->inbuf = (char *) raw + sizeof(raw3215_info);
memset(raw, 0, sizeof(raw3215_info));
raw->buffer = (char *) kmalloc(RAW3215_BUFFER_SIZE,
GFP_KERNEL|GFP_DMA);
if (raw->buffer == NULL) {
kfree(raw);
return -ENOMEM;
}
init_waitqueue_head(&raw->empty_wait);
raw3215[line] = raw;
}
tty->driver_data = raw;
raw->tty = tty;
......@@ -889,11 +983,12 @@ static int tty3215_open(struct tty_struct *tty, struct file * filp)
* This routine is called when the 3215 tty is closed. We wait
* for the remaining request to be completed. Then we clean up.
*/
static void tty3215_close(struct tty_struct *tty, struct file * filp)
static void
tty3215_close(struct tty_struct *tty, struct file * filp)
{
raw3215_info *raw;
struct raw3215_info *raw;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
if (raw == NULL || tty->count > 1)
return;
tty->closing = 1;
......@@ -906,11 +1001,12 @@ static void tty3215_close(struct tty_struct *tty, struct file * filp)
/*
* Returns the amount of free space in the output buffer.
*/
static int tty3215_write_room(struct tty_struct *tty)
static int
tty3215_write_room(struct tty_struct *tty)
{
raw3215_info *raw;
struct raw3215_info *raw;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
/* Subtract TAB_STOP_SIZE to allow for a tab, 8 <<< 64K */
if ((RAW3215_BUFFER_SIZE - raw->count - TAB_STOP_SIZE) >= 0)
......@@ -922,15 +1018,16 @@ static int tty3215_write_room(struct tty_struct *tty)
/*
* String write routine for 3215 ttys
*/
static int tty3215_write(struct tty_struct * tty, int from_user,
static int
tty3215_write(struct tty_struct * tty, int from_user,
const unsigned char *buf, int count)
{
raw3215_info *raw;
struct raw3215_info *raw;
int ret = 0;
if (!tty)
return 0;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
ret = raw3215_write(raw, buf, from_user, count);
return ret;
}
......@@ -938,36 +1035,40 @@ static int tty3215_write(struct tty_struct * tty, int from_user,
/*
* Put character routine for 3215 ttys
*/
static void tty3215_put_char(struct tty_struct *tty, unsigned char ch)
static void
tty3215_put_char(struct tty_struct *tty, unsigned char ch)
{
raw3215_info *raw;
struct raw3215_info *raw;
if (!tty)
return;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
raw3215_putchar(raw, ch);
}
static void tty3215_flush_chars(struct tty_struct *tty)
static void
tty3215_flush_chars(struct tty_struct *tty)
{
}
/*
* Returns the number of characters in the output buffer
*/
static int tty3215_chars_in_buffer(struct tty_struct *tty)
static int
tty3215_chars_in_buffer(struct tty_struct *tty)
{
raw3215_info *raw;
struct raw3215_info *raw;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
return raw->count;
}
static void tty3215_flush_buffer(struct tty_struct *tty)
static void
tty3215_flush_buffer(struct tty_struct *tty)
{
raw3215_info *raw;
struct raw3215_info *raw;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
raw3215_flush_buffer(raw);
wake_up_interruptible(&tty->write_wait);
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
......@@ -978,7 +1079,8 @@ static void tty3215_flush_buffer(struct tty_struct *tty)
/*
* Currently we don't have any io controls for 3215 ttys
*/
static int tty3215_ioctl(struct tty_struct *tty, struct file * file,
static int
tty3215_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
{
if (tty->flags & (1 << TTY_IO_ERROR))
......@@ -994,145 +1096,79 @@ static int tty3215_ioctl(struct tty_struct *tty, struct file * file,
/*
* Disable reading from a 3215 tty
*/
static void tty3215_throttle(struct tty_struct * tty)
static void
tty3215_throttle(struct tty_struct * tty)
{
raw3215_info *raw;
struct raw3215_info *raw;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
raw->flags |= RAW3215_THROTTLED;
}
/*
* Enable reading from a 3215 tty
*/
static void tty3215_unthrottle(struct tty_struct * tty)
static void
tty3215_unthrottle(struct tty_struct * tty)
{
raw3215_info *raw;
struct raw3215_info *raw;
unsigned long flags;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
if (raw->flags & RAW3215_THROTTLED) {
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
raw->flags &= ~RAW3215_THROTTLED;
raw3215_try_io(raw);
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
}
/*
* Disable writing to a 3215 tty
*/
static void tty3215_stop(struct tty_struct *tty)
static void
tty3215_stop(struct tty_struct *tty)
{
raw3215_info *raw;
struct raw3215_info *raw;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
raw->flags |= RAW3215_STOPPED;
}
/*
* Enable writing to a 3215 tty
*/
static void tty3215_start(struct tty_struct *tty)
static void
tty3215_start(struct tty_struct *tty)
{
raw3215_info *raw;
struct raw3215_info *raw;
unsigned long flags;
raw = (raw3215_info *) tty->driver_data;
raw = (struct raw3215_info *) tty->driver_data;
if (raw->flags & RAW3215_STOPPED) {
s390irq_spin_lock_irqsave(raw->irq, flags);
spin_lock_irqsave(raw->lock, flags);
raw->flags &= ~RAW3215_STOPPED;
raw3215_try_io(raw);
s390irq_spin_unlock_irqrestore(raw->irq, flags);
spin_unlock_irqrestore(raw->lock, flags);
}
}
/*
* 3215 console initialization code called from console_init().
* NOTE: This is called before kmalloc is available.
* 3215 tty registration code called from tty_init().
* Most kernel services (incl. kmalloc) are available at this poimt.
*/
void __init con3215_init(void)
int __init
tty3215_init(void)
{
#ifdef CONFIG_TN3215_CONSOLE
raw3215_info *raw;
#endif
raw3215_req *req;
int irq;
int i;
int ret;
/* Check if 3215 is to be the console */
if (!CONSOLE_IS_3215)
return;
/* Set the console mode for VM */
if (MACHINE_IS_VM) {
cpcmd("TERM CONMODE 3215", NULL, 0);
cpcmd("TERM AUTOCR OFF", NULL, 0);
}
if (console_device != -1) {
/* use the device number that was specified on the
* command line */
irq = raw3215_find_dev(0);
} else if (MACHINE_IS_VM) {
/* under VM, the console is at device number 0009
* by default, so try that */
irq = get_irq_by_devno(0x0009);
} else {
/* unlike in 2.4, we cannot autoprobe here, since
* the channel subsystem is not fully initialized.
* With some luck, the HWC console can take over */
printk(KERN_WARNING "3215 console not found\n");
return;
}
/* allocate 3215 request structures */
raw3215_freelist = NULL;
spin_lock_init(&raw3215_freelist_lock);
for (i = 0; i < NR_3215_REQ; i++) {
req = (raw3215_req *) alloc_bootmem_low(sizeof(raw3215_req));
req->next = raw3215_freelist;
raw3215_freelist = req;
}
#ifdef CONFIG_TN3215_CONSOLE
raw3215[0] = raw = (raw3215_info *)
alloc_bootmem_low(sizeof(raw3215_info));
memset(raw, 0, sizeof(raw3215_info));
raw->buffer = (char *) alloc_bootmem_low(RAW3215_BUFFER_SIZE);
raw->inbuf = (char *) alloc_bootmem_low(RAW3215_INBUF_SIZE);
/* Find the first console */
raw->irq = irq;
raw->flags |= RAW3215_FIXED;
tasklet_init(&raw->tasklet,
(void (*)(unsigned long)) raw3215_tasklet,
(unsigned long) raw);
init_waitqueue_head(&raw->empty_wait);
/* Request the console irq */
if ( raw3215_startup(raw) != 0 )
raw->irq = -1;
if (raw->irq != -1) {
register_console(&con3215);
} else {
free_bootmem((unsigned long) raw->inbuf, RAW3215_INBUF_SIZE);
free_bootmem((unsigned long) raw->buffer, RAW3215_BUFFER_SIZE);
free_bootmem((unsigned long) raw, sizeof(raw3215_info));
raw3215[0] = NULL;
printk("Couldn't find a 3215 console device\n");
}
#endif
}
return 0;
/*
* 3215 tty registration code called from tty_init().
* Most kernel services (incl. kmalloc) are available at this poimt.
*/
void __init tty3215_init(void)
{
ret = ccw_driver_register(&raw3215_ccw_driver);
if (ret)
return ret;
/*
* Initialize the tty_driver structure
* Entries in tty3215_driver that are NOT initialized:
......@@ -1179,6 +1215,18 @@ void __init tty3215_init(void)
tty3215_driver.wait_until_sent = NULL;
tty3215_driver.read_proc = NULL;
if (tty_register_driver(&tty3215_driver))
panic("Couldn't register tty3215 driver\n");
ret = tty_register_driver(&tty3215_driver);
if (ret)
printk("Couldn't register tty3215 driver\n");
return ret;
}
static void __exit
tty3215_exit(void)
{
tty_unregister_driver(&tty3215_driver);
ccw_driver_unregister(&raw3215_ccw_driver);
}
module_init(tty3215_init);
module_exit(tty3215_exit);
drivers/s390/char/ctrlchar.c
View file @ d022be21
......@@ -9,6 +9,7 @@
#include <linux/config.h>
#include <linux/stddef.h>
#include <asm/errno.h>
#include <linux/sysrq.h>
#include <linux/ctype.h>
......@@ -20,7 +21,7 @@ static int ctrlchar_sysrq_key;
static void
ctrlchar_handle_sysrq(void *tty)
{
handle_sysrq(ctrlchar_sysrq_key, NULL, tty);
handle_sysrq(ctrlchar_sysrq_key, NULL, (struct tty_struct *) tty);
}
static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq, 0);
......@@ -39,7 +40,7 @@ static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq, 0);
* with CTRLCHAR_CTRL
*/
unsigned int
ctrlchar_handle(const char *buf, int len, struct tty_struct *tty)
ctrlchar_handle(const unsigned char *buf, int len, struct tty_struct *tty)
{
if ((len < 2) || (len > 3))
return CTRLCHAR_NONE;
......
drivers/s390/char/ctrlchar.h
View file @ d022be21
......@@ -10,7 +10,7 @@
#include <linux/tty.h>
extern unsigned int
ctrlchar_handle(const char *buf, int len, struct tty_struct *tty);
ctrlchar_handle(const unsigned char *buf, int len, struct tty_struct *tty);
#define CTRLCHAR_NONE (1 << 8)
......
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