288 lines
8.2 KiB
C
288 lines
8.2 KiB
C
/*
|
|
* IBM/3270 Driver
|
|
*
|
|
* Author(s):
|
|
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
|
|
* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
* Copyright IBM Corp. 2003, 2009
|
|
*/
|
|
|
|
#include <asm/idals.h>
|
|
#include <asm/ioctl.h>
|
|
|
|
/* ioctls for fullscreen 3270 */
|
|
#define TUBICMD _IO('3', 3) /* set ccw command for fs reads. */
|
|
#define TUBOCMD _IO('3', 4) /* set ccw command for fs writes. */
|
|
#define TUBGETI _IO('3', 7) /* get ccw command for fs reads. */
|
|
#define TUBGETO _IO('3', 8) /* get ccw command for fs writes. */
|
|
#define TUBSETMOD _IO('3',12) /* FIXME: what does it do ?*/
|
|
#define TUBGETMOD _IO('3',13) /* FIXME: what does it do ?*/
|
|
|
|
/* Local Channel Commands */
|
|
#define TC_WRITE 0x01 /* Write */
|
|
#define TC_RDBUF 0x02 /* Read Buffer */
|
|
#define TC_EWRITE 0x05 /* Erase write */
|
|
#define TC_READMOD 0x06 /* Read modified */
|
|
#define TC_EWRITEA 0x0d /* Erase write alternate */
|
|
#define TC_WRITESF 0x11 /* Write structured field */
|
|
|
|
/* Buffer Control Orders */
|
|
#define TO_SF 0x1d /* Start field */
|
|
#define TO_SBA 0x11 /* Set buffer address */
|
|
#define TO_IC 0x13 /* Insert cursor */
|
|
#define TO_PT 0x05 /* Program tab */
|
|
#define TO_RA 0x3c /* Repeat to address */
|
|
#define TO_SFE 0x29 /* Start field extended */
|
|
#define TO_EUA 0x12 /* Erase unprotected to address */
|
|
#define TO_MF 0x2c /* Modify field */
|
|
#define TO_SA 0x28 /* Set attribute */
|
|
|
|
/* Field Attribute Bytes */
|
|
#define TF_INPUT 0x40 /* Visible input */
|
|
#define TF_INPUTN 0x4c /* Invisible input */
|
|
#define TF_INMDT 0xc1 /* Visible, Set-MDT */
|
|
#define TF_LOG 0x60
|
|
|
|
/* Character Attribute Bytes */
|
|
#define TAT_RESET 0x00
|
|
#define TAT_FIELD 0xc0
|
|
#define TAT_EXTHI 0x41
|
|
#define TAT_COLOR 0x42
|
|
#define TAT_CHARS 0x43
|
|
#define TAT_TRANS 0x46
|
|
|
|
/* Extended-Highlighting Bytes */
|
|
#define TAX_RESET 0x00
|
|
#define TAX_BLINK 0xf1
|
|
#define TAX_REVER 0xf2
|
|
#define TAX_UNDER 0xf4
|
|
|
|
/* Reset value */
|
|
#define TAR_RESET 0x00
|
|
|
|
/* Color values */
|
|
#define TAC_RESET 0x00
|
|
#define TAC_BLUE 0xf1
|
|
#define TAC_RED 0xf2
|
|
#define TAC_PINK 0xf3
|
|
#define TAC_GREEN 0xf4
|
|
#define TAC_TURQ 0xf5
|
|
#define TAC_YELLOW 0xf6
|
|
#define TAC_WHITE 0xf7
|
|
#define TAC_DEFAULT 0x00
|
|
|
|
/* Write Control Characters */
|
|
#define TW_NONE 0x40 /* No particular action */
|
|
#define TW_KR 0xc2 /* Keyboard restore */
|
|
#define TW_PLUSALARM 0x04 /* Add this bit for alarm */
|
|
|
|
#define RAW3270_FIRSTMINOR 1 /* First minor number */
|
|
#define RAW3270_MAXDEVS 255 /* Max number of 3270 devices */
|
|
|
|
/* For TUBGETMOD and TUBSETMOD. Should include. */
|
|
struct raw3270_iocb {
|
|
short model;
|
|
short line_cnt;
|
|
short col_cnt;
|
|
short pf_cnt;
|
|
short re_cnt;
|
|
short map;
|
|
};
|
|
|
|
struct raw3270;
|
|
struct raw3270_view;
|
|
extern struct class *class3270;
|
|
|
|
/* 3270 CCW request */
|
|
struct raw3270_request {
|
|
struct list_head list; /* list head for request queueing. */
|
|
struct raw3270_view *view; /* view of this request */
|
|
struct ccw1 ccw; /* single ccw. */
|
|
void *buffer; /* output buffer. */
|
|
size_t size; /* size of output buffer. */
|
|
int rescnt; /* residual count from devstat. */
|
|
int rc; /* return code for this request. */
|
|
|
|
/* Callback for delivering final status. */
|
|
void (*callback)(struct raw3270_request *, void *);
|
|
void *callback_data;
|
|
};
|
|
|
|
struct raw3270_request *raw3270_request_alloc(size_t size);
|
|
struct raw3270_request *raw3270_request_alloc_bootmem(size_t size);
|
|
void raw3270_request_free(struct raw3270_request *);
|
|
void raw3270_request_reset(struct raw3270_request *);
|
|
void raw3270_request_set_cmd(struct raw3270_request *, u8 cmd);
|
|
int raw3270_request_add_data(struct raw3270_request *, void *, size_t);
|
|
void raw3270_request_set_data(struct raw3270_request *, void *, size_t);
|
|
void raw3270_request_set_idal(struct raw3270_request *, struct idal_buffer *);
|
|
|
|
static inline int
|
|
raw3270_request_final(struct raw3270_request *rq)
|
|
{
|
|
return list_empty(&rq->list);
|
|
}
|
|
|
|
void raw3270_buffer_address(struct raw3270 *, char *, unsigned short);
|
|
|
|
/* Return value of *intv (see raw3270_fn below) can be one of the following: */
|
|
#define RAW3270_IO_DONE 0 /* request finished */
|
|
#define RAW3270_IO_BUSY 1 /* request still active */
|
|
#define RAW3270_IO_RETRY 2 /* retry current request */
|
|
#define RAW3270_IO_STOP 3 /* kill current request */
|
|
|
|
/*
|
|
* Functions of a 3270 view.
|
|
*/
|
|
struct raw3270_fn {
|
|
int (*activate)(struct raw3270_view *);
|
|
void (*deactivate)(struct raw3270_view *);
|
|
int (*intv)(struct raw3270_view *,
|
|
struct raw3270_request *, struct irb *);
|
|
void (*release)(struct raw3270_view *);
|
|
void (*free)(struct raw3270_view *);
|
|
void (*resize)(struct raw3270_view *, int, int, int);
|
|
};
|
|
|
|
/*
|
|
* View structure chaining. The raw3270_view structure is meant to
|
|
* be embedded at the start of the real view data structure, e.g.:
|
|
* struct example {
|
|
* struct raw3270_view view;
|
|
* ...
|
|
* };
|
|
*/
|
|
struct raw3270_view {
|
|
struct list_head list;
|
|
spinlock_t lock;
|
|
atomic_t ref_count;
|
|
struct raw3270 *dev;
|
|
struct raw3270_fn *fn;
|
|
unsigned int model;
|
|
unsigned int rows, cols; /* # of rows & colums of the view */
|
|
unsigned char *ascebc; /* ascii -> ebcdic table */
|
|
};
|
|
|
|
int raw3270_add_view(struct raw3270_view *, struct raw3270_fn *, int);
|
|
int raw3270_activate_view(struct raw3270_view *);
|
|
void raw3270_del_view(struct raw3270_view *);
|
|
void raw3270_deactivate_view(struct raw3270_view *);
|
|
struct raw3270_view *raw3270_find_view(struct raw3270_fn *, int);
|
|
int raw3270_start(struct raw3270_view *, struct raw3270_request *);
|
|
int raw3270_start_locked(struct raw3270_view *, struct raw3270_request *);
|
|
int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
|
|
int raw3270_reset(struct raw3270_view *);
|
|
struct raw3270_view *raw3270_view(struct raw3270_view *);
|
|
|
|
/* Reference count inliner for view structures. */
|
|
static inline void
|
|
raw3270_get_view(struct raw3270_view *view)
|
|
{
|
|
atomic_inc(&view->ref_count);
|
|
}
|
|
|
|
extern wait_queue_head_t raw3270_wait_queue;
|
|
|
|
static inline void
|
|
raw3270_put_view(struct raw3270_view *view)
|
|
{
|
|
if (atomic_dec_return(&view->ref_count) == 0)
|
|
wake_up(&raw3270_wait_queue);
|
|
}
|
|
|
|
struct raw3270 *raw3270_setup_console(struct ccw_device *cdev);
|
|
void raw3270_wait_cons_dev(struct raw3270 *);
|
|
|
|
/* Notifier for device addition/removal */
|
|
struct raw3270_notifier {
|
|
struct list_head list;
|
|
void (*create)(int minor);
|
|
void (*destroy)(int minor);
|
|
};
|
|
|
|
int raw3270_register_notifier(struct raw3270_notifier *);
|
|
void raw3270_unregister_notifier(struct raw3270_notifier *);
|
|
void raw3270_pm_unfreeze(struct raw3270_view *);
|
|
|
|
/*
|
|
* Little memory allocator for string objects.
|
|
*/
|
|
struct string
|
|
{
|
|
struct list_head list;
|
|
struct list_head update;
|
|
unsigned long size;
|
|
unsigned long len;
|
|
char string[0];
|
|
} __attribute__ ((aligned(8)));
|
|
|
|
static inline struct string *
|
|
alloc_string(struct list_head *free_list, unsigned long len)
|
|
{
|
|
struct string *cs, *tmp;
|
|
unsigned long size;
|
|
|
|
size = (len + 7L) & -8L;
|
|
list_for_each_entry(cs, free_list, list) {
|
|
if (cs->size < size)
|
|
continue;
|
|
if (cs->size > size + sizeof(struct string)) {
|
|
char *endaddr = (char *) (cs + 1) + cs->size;
|
|
tmp = (struct string *) (endaddr - size) - 1;
|
|
tmp->size = size;
|
|
cs->size -= size + sizeof(struct string);
|
|
cs = tmp;
|
|
} else
|
|
list_del(&cs->list);
|
|
cs->len = len;
|
|
INIT_LIST_HEAD(&cs->list);
|
|
INIT_LIST_HEAD(&cs->update);
|
|
return cs;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline unsigned long
|
|
free_string(struct list_head *free_list, struct string *cs)
|
|
{
|
|
struct string *tmp;
|
|
struct list_head *p, *left;
|
|
|
|
/* Find out the left neighbour in free memory list. */
|
|
left = free_list;
|
|
list_for_each(p, free_list) {
|
|
if (list_entry(p, struct string, list) > cs)
|
|
break;
|
|
left = p;
|
|
}
|
|
/* Try to merge with right neighbour = next element from left. */
|
|
if (left->next != free_list) {
|
|
tmp = list_entry(left->next, struct string, list);
|
|
if ((char *) (cs + 1) + cs->size == (char *) tmp) {
|
|
list_del(&tmp->list);
|
|
cs->size += tmp->size + sizeof(struct string);
|
|
}
|
|
}
|
|
/* Try to merge with left neighbour. */
|
|
if (left != free_list) {
|
|
tmp = list_entry(left, struct string, list);
|
|
if ((char *) (tmp + 1) + tmp->size == (char *) cs) {
|
|
tmp->size += cs->size + sizeof(struct string);
|
|
return tmp->size;
|
|
}
|
|
}
|
|
__list_add(&cs->list, left, left->next);
|
|
return cs->size;
|
|
}
|
|
|
|
static inline void
|
|
add_string_memory(struct list_head *free_list, void *mem, unsigned long size)
|
|
{
|
|
struct string *cs;
|
|
|
|
cs = (struct string *) mem;
|
|
cs->size = size - sizeof(struct string);
|
|
free_string(free_list, cs);
|
|
}
|
|
|