1 /* SPDX-License-Identifier: GPL-2.0 */
6 * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
8 * Copyright IBM Corp. 2003, 2009
11 #include <asm/idals.h>
12 #include <asm/ioctl.h>
14 /* ioctls for fullscreen 3270 */
15 #define TUBICMD _IO('3', 3) /* set ccw command for fs reads. */
16 #define TUBOCMD _IO('3', 4) /* set ccw command for fs writes. */
17 #define TUBGETI _IO('3', 7) /* get ccw command for fs reads. */
18 #define TUBGETO _IO('3', 8) /* get ccw command for fs writes. */
19 #define TUBSETMOD _IO('3',12) /* FIXME: what does it do ?*/
20 #define TUBGETMOD _IO('3',13) /* FIXME: what does it do ?*/
22 /* Local Channel Commands */
23 #define TC_WRITE 0x01 /* Write */
24 #define TC_RDBUF 0x02 /* Read Buffer */
25 #define TC_EWRITE 0x05 /* Erase write */
26 #define TC_READMOD 0x06 /* Read modified */
27 #define TC_EWRITEA 0x0d /* Erase write alternate */
28 #define TC_WRITESF 0x11 /* Write structured field */
30 /* Buffer Control Orders */
31 #define TO_SF 0x1d /* Start field */
32 #define TO_SBA 0x11 /* Set buffer address */
33 #define TO_IC 0x13 /* Insert cursor */
34 #define TO_PT 0x05 /* Program tab */
35 #define TO_RA 0x3c /* Repeat to address */
36 #define TO_SFE 0x29 /* Start field extended */
37 #define TO_EUA 0x12 /* Erase unprotected to address */
38 #define TO_MF 0x2c /* Modify field */
39 #define TO_SA 0x28 /* Set attribute */
41 /* Field Attribute Bytes */
42 #define TF_INPUT 0x40 /* Visible input */
43 #define TF_INPUTN 0x4c /* Invisible input */
44 #define TF_INMDT 0xc1 /* Visible, Set-MDT */
47 /* Character Attribute Bytes */
48 #define TAT_RESET 0x00
49 #define TAT_FIELD 0xc0
50 #define TAT_EXTHI 0x41
51 #define TAT_COLOR 0x42
52 #define TAT_CHARS 0x43
53 #define TAT_TRANS 0x46
55 /* Extended-Highlighting Bytes */
56 #define TAX_RESET 0x00
57 #define TAX_BLINK 0xf1
58 #define TAX_REVER 0xf2
59 #define TAX_UNDER 0xf4
62 #define TAR_RESET 0x00
65 #define TAC_RESET 0x00
69 #define TAC_GREEN 0xf4
71 #define TAC_YELLOW 0xf6
72 #define TAC_WHITE 0xf7
73 #define TAC_DEFAULT 0x00
75 /* Write Control Characters */
76 #define TW_NONE 0x40 /* No particular action */
77 #define TW_KR 0xc2 /* Keyboard restore */
78 #define TW_PLUSALARM 0x04 /* Add this bit for alarm */
80 #define RAW3270_FIRSTMINOR 1 /* First minor number */
81 #define RAW3270_MAXDEVS 255 /* Max number of 3270 devices */
83 /* For TUBGETMOD and TUBSETMOD. Should include. */
95 extern struct class *class3270;
97 /* 3270 CCW request */
98 struct raw3270_request {
99 struct list_head list; /* list head for request queueing. */
100 struct raw3270_view *view; /* view of this request */
101 struct ccw1 ccw; /* single ccw. */
102 void *buffer; /* output buffer. */
103 size_t size; /* size of output buffer. */
104 int rescnt; /* residual count from devstat. */
105 int rc; /* return code for this request. */
107 /* Callback for delivering final status. */
108 void (*callback)(struct raw3270_request *, void *);
112 struct raw3270_request *raw3270_request_alloc(size_t size);
113 struct raw3270_request *raw3270_request_alloc_bootmem(size_t size);
114 void raw3270_request_free(struct raw3270_request *);
115 void raw3270_request_reset(struct raw3270_request *);
116 void raw3270_request_set_cmd(struct raw3270_request *, u8 cmd);
117 int raw3270_request_add_data(struct raw3270_request *, void *, size_t);
118 void raw3270_request_set_data(struct raw3270_request *, void *, size_t);
119 void raw3270_request_set_idal(struct raw3270_request *, struct idal_buffer *);
122 raw3270_request_final(struct raw3270_request *rq)
124 return list_empty(&rq->list);
127 void raw3270_buffer_address(struct raw3270 *, char *, unsigned short);
130 * Functions of a 3270 view.
133 int (*activate)(struct raw3270_view *);
134 void (*deactivate)(struct raw3270_view *);
135 void (*intv)(struct raw3270_view *,
136 struct raw3270_request *, struct irb *);
137 void (*release)(struct raw3270_view *);
138 void (*free)(struct raw3270_view *);
139 void (*resize)(struct raw3270_view *, int, int, int);
143 * View structure chaining. The raw3270_view structure is meant to
144 * be embedded at the start of the real view data structure, e.g.:
146 * struct raw3270_view view;
150 struct raw3270_view {
151 struct list_head list;
155 struct raw3270_fn *fn;
157 unsigned int rows, cols; /* # of rows & colums of the view */
158 unsigned char *ascebc; /* ascii -> ebcdic table */
161 int raw3270_add_view(struct raw3270_view *, struct raw3270_fn *, int);
162 int raw3270_activate_view(struct raw3270_view *);
163 void raw3270_del_view(struct raw3270_view *);
164 void raw3270_deactivate_view(struct raw3270_view *);
165 struct raw3270_view *raw3270_find_view(struct raw3270_fn *, int);
166 int raw3270_start(struct raw3270_view *, struct raw3270_request *);
167 int raw3270_start_locked(struct raw3270_view *, struct raw3270_request *);
168 int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
169 int raw3270_reset(struct raw3270_view *);
170 struct raw3270_view *raw3270_view(struct raw3270_view *);
171 int raw3270_view_active(struct raw3270_view *);
173 /* Reference count inliner for view structures. */
175 raw3270_get_view(struct raw3270_view *view)
177 atomic_inc(&view->ref_count);
180 extern wait_queue_head_t raw3270_wait_queue;
183 raw3270_put_view(struct raw3270_view *view)
185 if (atomic_dec_return(&view->ref_count) == 0)
186 wake_up(&raw3270_wait_queue);
189 struct raw3270 *raw3270_setup_console(void);
190 void raw3270_wait_cons_dev(struct raw3270 *);
192 /* Notifier for device addition/removal */
193 struct raw3270_notifier {
194 struct list_head list;
195 void (*create)(int minor);
196 void (*destroy)(int minor);
199 int raw3270_register_notifier(struct raw3270_notifier *);
200 void raw3270_unregister_notifier(struct raw3270_notifier *);
201 void raw3270_pm_unfreeze(struct raw3270_view *);
204 * Little memory allocator for string objects.
208 struct list_head list;
209 struct list_head update;
213 } __attribute__ ((aligned(8)));
215 static inline struct string *
216 alloc_string(struct list_head *free_list, unsigned long len)
218 struct string *cs, *tmp;
221 size = (len + 7L) & -8L;
222 list_for_each_entry(cs, free_list, list) {
225 if (cs->size > size + sizeof(struct string)) {
226 char *endaddr = (char *) (cs + 1) + cs->size;
227 tmp = (struct string *) (endaddr - size) - 1;
229 cs->size -= size + sizeof(struct string);
234 INIT_LIST_HEAD(&cs->list);
235 INIT_LIST_HEAD(&cs->update);
241 static inline unsigned long
242 free_string(struct list_head *free_list, struct string *cs)
245 struct list_head *p, *left;
247 /* Find out the left neighbour in free memory list. */
249 list_for_each(p, free_list) {
250 if (list_entry(p, struct string, list) > cs)
254 /* Try to merge with right neighbour = next element from left. */
255 if (left->next != free_list) {
256 tmp = list_entry(left->next, struct string, list);
257 if ((char *) (cs + 1) + cs->size == (char *) tmp) {
258 list_del(&tmp->list);
259 cs->size += tmp->size + sizeof(struct string);
262 /* Try to merge with left neighbour. */
263 if (left != free_list) {
264 tmp = list_entry(left, struct string, list);
265 if ((char *) (tmp + 1) + tmp->size == (char *) cs) {
266 tmp->size += cs->size + sizeof(struct string);
270 __list_add(&cs->list, left, left->next);
275 add_string_memory(struct list_head *free_list, void *mem, unsigned long size)
279 cs = (struct string *) mem;
280 cs->size = size - sizeof(struct string);
281 free_string(free_list, cs);