struct tty_driver *sclp_tty_driver;
-static struct sclp_ioctls sclp_ioctls;
-static struct sclp_ioctls sclp_ioctls_init =
-{
- 8, /* 1 hor. tab. = 8 spaces */
- 0, /* no echo of input by this driver */
- 80, /* 80 characters/line */
- 1, /* write after 1/10 s without final new line */
- MAX_KMEM_PAGES, /* quick fix: avoid __alloc_pages */
- MAX_KMEM_PAGES, /* take 32/64 pages from kernel memory, */
- 0, /* do not convert to lower case */
- 0x6c /* to seprate upper and lower case */
- /* ('%' in EBCDIC) */
-};
+static int sclp_tty_tolower;
+static int sclp_tty_columns = 80;
+
+#define SPACES_PER_TAB 8
+#define CASE_DELIMITER 0x6c /* to separate upper and lower case (% in EBCDIC) */
/* This routine is called whenever we try to open a SCLP terminal. */
static int
sclp_tty = NULL;
}
-/* execute commands to control the i/o behaviour of the SCLP tty at runtime */
-static int
-sclp_tty_ioctl(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg)
-{
- unsigned long flags;
- unsigned int obuf;
- int check;
- int rc;
-
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- rc = 0;
- check = 0;
- switch (cmd) {
- case TIOCSCLPSHTAB:
- /* set width of horizontal tab */
- if (get_user(sclp_ioctls.htab, (unsigned short __user *) arg))
- rc = -EFAULT;
- else
- check = 1;
- break;
- case TIOCSCLPGHTAB:
- /* get width of horizontal tab */
- if (put_user(sclp_ioctls.htab, (unsigned short __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPSECHO:
- /* enable/disable echo of input */
- if (get_user(sclp_ioctls.echo, (unsigned char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPGECHO:
- /* Is echo of input enabled ? */
- if (put_user(sclp_ioctls.echo, (unsigned char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPSCOLS:
- /* set number of columns for output */
- if (get_user(sclp_ioctls.columns, (unsigned short __user *) arg))
- rc = -EFAULT;
- else
- check = 1;
- break;
- case TIOCSCLPGCOLS:
- /* get number of columns for output */
- if (put_user(sclp_ioctls.columns, (unsigned short __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPSNL:
- /* enable/disable writing without final new line character */
- if (get_user(sclp_ioctls.final_nl, (signed char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPGNL:
- /* Is writing without final new line character enabled ? */
- if (put_user(sclp_ioctls.final_nl, (signed char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPSOBUF:
- /*
- * set the maximum buffers size for output, will be rounded
- * up to next 4kB boundary and stored as number of SCCBs
- * (4kB Buffers) limitation: 256 x 4kB
- */
- if (get_user(obuf, (unsigned int __user *) arg) == 0) {
- if (obuf & 0xFFF)
- sclp_ioctls.max_sccb = (obuf >> 12) + 1;
- else
- sclp_ioctls.max_sccb = (obuf >> 12);
- } else
- rc = -EFAULT;
- break;
- case TIOCSCLPGOBUF:
- /* get the maximum buffers size for output */
- obuf = sclp_ioctls.max_sccb << 12;
- if (put_user(obuf, (unsigned int __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPGKBUF:
- /* get the number of buffers got from kernel at startup */
- if (put_user(sclp_ioctls.kmem_sccb, (unsigned short __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPSCASE:
- /* enable/disable conversion from upper to lower case */
- if (get_user(sclp_ioctls.tolower, (unsigned char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPGCASE:
- /* Is conversion from upper to lower case of input enabled? */
- if (put_user(sclp_ioctls.tolower, (unsigned char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPSDELIM:
- /*
- * set special character used for separating upper and
- * lower case, 0x00 disables this feature
- */
- if (get_user(sclp_ioctls.delim, (unsigned char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPGDELIM:
- /*
- * get special character used for separating upper and
- * lower case, 0x00 disables this feature
- */
- if (put_user(sclp_ioctls.delim, (unsigned char __user *) arg))
- rc = -EFAULT;
- break;
- case TIOCSCLPSINIT:
- /* set initial (default) sclp ioctls */
- sclp_ioctls = sclp_ioctls_init;
- check = 1;
- break;
- default:
- rc = -ENOIOCTLCMD;
- break;
- }
- if (check) {
- spin_lock_irqsave(&sclp_tty_lock, flags);
- if (sclp_ttybuf != NULL) {
- sclp_set_htab(sclp_ttybuf, sclp_ioctls.htab);
- sclp_set_columns(sclp_ttybuf, sclp_ioctls.columns);
- }
- spin_unlock_irqrestore(&sclp_tty_lock, flags);
- }
- return rc;
-}
-
/*
* This routine returns the numbers of characters the tty driver
* will accept for queuing to be written. This number is subject
}
page = sclp_tty_pages.next;
list_del((struct list_head *) page);
- sclp_ttybuf = sclp_make_buffer(page,
- sclp_ioctls.columns,
- sclp_ioctls.htab);
+ sclp_ttybuf = sclp_make_buffer(page, sclp_tty_columns,
+ SPACES_PER_TAB);
}
/* try to write the string to the current output buffer */
written = sclp_write(sclp_ttybuf, str, count);
count -= written;
} while (count > 0);
/* Setup timer to output current console buffer after 1/10 second */
- if (sclp_ioctls.final_nl) {
- if (sclp_ttybuf != NULL &&
- sclp_chars_in_buffer(sclp_ttybuf) != 0 &&
- !timer_pending(&sclp_tty_timer)) {
- init_timer(&sclp_tty_timer);
- sclp_tty_timer.function = sclp_tty_timeout;
- sclp_tty_timer.data = 0UL;
- sclp_tty_timer.expires = jiffies + HZ/10;
- add_timer(&sclp_tty_timer);
- }
- } else {
- if (sclp_ttybuf != NULL &&
- sclp_chars_in_buffer(sclp_ttybuf) != 0) {
- buf = sclp_ttybuf;
- sclp_ttybuf = NULL;
- spin_unlock_irqrestore(&sclp_tty_lock, flags);
- __sclp_ttybuf_emit(buf);
- spin_lock_irqsave(&sclp_tty_lock, flags);
- }
+ if (sclp_ttybuf && sclp_chars_in_buffer(sclp_ttybuf) &&
+ !timer_pending(&sclp_tty_timer)) {
+ init_timer(&sclp_tty_timer);
+ sclp_tty_timer.function = sclp_tty_timeout;
+ sclp_tty_timer.data = 0UL;
+ sclp_tty_timer.expires = jiffies + HZ/10;
+ add_timer(&sclp_tty_timer);
}
spin_unlock_irqrestore(&sclp_tty_lock, flags);
}
* modifiy original string,
* returns length of resulting string
*/
-static int
-sclp_switch_cases(unsigned char *buf, int count,
- unsigned char delim, int tolower)
+static int sclp_switch_cases(unsigned char *buf, int count)
{
unsigned char *ip, *op;
int toggle;
ip = op = buf;
while (count-- > 0) {
/* compare with special character */
- if (*ip == delim) {
+ if (*ip == CASE_DELIMITER) {
/* followed by another special character? */
- if (count && ip[1] == delim) {
+ if (count && ip[1] == CASE_DELIMITER) {
/*
* ... then put a single copy of the special
* character to the output string
/* not the special character */
if (toggle)
/* but case switching is on */
- if (tolower)
+ if (sclp_tty_tolower)
/* switch to uppercase */
*op++ = _ebc_toupper[(int) *ip++];
else
int count;
count = end - start;
- /*
- * if set in ioctl convert EBCDIC to lower case
- * (modify original input in SCCB)
- */
- if (sclp_ioctls.tolower)
+ if (sclp_tty_tolower)
EBC_TOLOWER(start, count);
-
- /*
- * if set in ioctl find out characters in lower or upper case
- * (depends on current case) separated by a special character,
- * works on EBCDIC
- */
- if (sclp_ioctls.delim)
- count = sclp_switch_cases(start, count,
- sclp_ioctls.delim,
- sclp_ioctls.tolower);
-
+ count = sclp_switch_cases(start, count);
/* convert EBCDIC to ASCII (modify original input in SCCB) */
sclp_ebcasc_str(start, count);
- /* if set in ioctl write operators input to console */
- if (sclp_ioctls.echo)
- sclp_tty_write(sclp_tty, start, count);
-
/* transfer input to high level driver */
sclp_tty_input(start, count);
}
.write_room = sclp_tty_write_room,
.chars_in_buffer = sclp_tty_chars_in_buffer,
.flush_buffer = sclp_tty_flush_buffer,
- .ioctl = sclp_tty_ioctl,
};
static int __init
* save 4 characters for the CPU number
* written at start of each line by VM/CP
*/
- sclp_ioctls_init.columns = 76;
+ sclp_tty_columns = 76;
/* case input lines to lowercase */
- sclp_ioctls_init.tolower = 1;
+ sclp_tty_tolower = 1;
}
- sclp_ioctls = sclp_ioctls_init;
sclp_tty_chars_count = 0;
sclp_tty = NULL;
#ifndef __SCLP_TTY_H__
#define __SCLP_TTY_H__
-#include <linux/ioctl.h>
-#include <linux/termios.h>
#include <linux/tty_driver.h>
-/* This is the type of data structures storing sclp ioctl setting. */
-struct sclp_ioctls {
- unsigned short htab;
- unsigned char echo;
- unsigned short columns;
- unsigned char final_nl;
- unsigned short max_sccb;
- unsigned short kmem_sccb; /* can't be modified at run time */
- unsigned char tolower;
- unsigned char delim;
-};
-
-/* must be unique, FIXME: must be added in Documentation/ioctl_number.txt */
-#define SCLP_IOCTL_LETTER 'B'
-
-/* set width of horizontal tabulator */
-#define TIOCSCLPSHTAB _IOW(SCLP_IOCTL_LETTER, 0, unsigned short)
-/* enable/disable echo of input (independent from line discipline) */
-#define TIOCSCLPSECHO _IOW(SCLP_IOCTL_LETTER, 1, unsigned char)
-/* set number of colums for output */
-#define TIOCSCLPSCOLS _IOW(SCLP_IOCTL_LETTER, 2, unsigned short)
-/* enable/disable writing without final new line character */
-#define TIOCSCLPSNL _IOW(SCLP_IOCTL_LETTER, 4, signed char)
-/* set the maximum buffers size for output, rounded up to next 4kB boundary */
-#define TIOCSCLPSOBUF _IOW(SCLP_IOCTL_LETTER, 5, unsigned short)
-/* set initial (default) sclp ioctls */
-#define TIOCSCLPSINIT _IO(SCLP_IOCTL_LETTER, 6)
-/* enable/disable conversion from upper to lower case of input */
-#define TIOCSCLPSCASE _IOW(SCLP_IOCTL_LETTER, 7, unsigned char)
-/* set special character used for separating upper and lower case, */
-/* 0x00 disables this feature */
-#define TIOCSCLPSDELIM _IOW(SCLP_IOCTL_LETTER, 9, unsigned char)
-
-/* get width of horizontal tabulator */
-#define TIOCSCLPGHTAB _IOR(SCLP_IOCTL_LETTER, 10, unsigned short)
-/* Is echo of input enabled ? (independent from line discipline) */
-#define TIOCSCLPGECHO _IOR(SCLP_IOCTL_LETTER, 11, unsigned char)
-/* get number of colums for output */
-#define TIOCSCLPGCOLS _IOR(SCLP_IOCTL_LETTER, 12, unsigned short)
-/* Is writing without final new line character enabled ? */
-#define TIOCSCLPGNL _IOR(SCLP_IOCTL_LETTER, 14, signed char)
-/* get the maximum buffers size for output */
-#define TIOCSCLPGOBUF _IOR(SCLP_IOCTL_LETTER, 15, unsigned short)
-/* Is conversion from upper to lower case of input enabled ? */
-#define TIOCSCLPGCASE _IOR(SCLP_IOCTL_LETTER, 17, unsigned char)
-/* get special character used for separating upper and lower case, */
-/* 0x00 disables this feature */
-#define TIOCSCLPGDELIM _IOR(SCLP_IOCTL_LETTER, 19, unsigned char)
-/* get the number of buffers/pages got from kernel at startup */
-#define TIOCSCLPGKBUF _IOR(SCLP_IOCTL_LETTER, 20, unsigned short)
-
extern struct tty_driver *sclp_tty_driver;
#endif /* __SCLP_TTY_H__ */
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff