diff options
Diffstat (limited to 'drivers/char/istallion.c')
| -rw-r--r-- | drivers/char/istallion.c | 121 |
1 files changed, 52 insertions, 69 deletions
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c index 5c3dc6b8411..fff19f7e29d 100644 --- a/drivers/char/istallion.c +++ b/drivers/char/istallion.c @@ -24,6 +24,7 @@ #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial.h> +#include <linux/seq_file.h> #include <linux/cdk.h> #include <linux/comstats.h> #include <linux/istallion.h> @@ -613,7 +614,6 @@ static int stli_breakctl(struct tty_struct *tty, int state); static void stli_waituntilsent(struct tty_struct *tty, int timeout); static void stli_sendxchar(struct tty_struct *tty, char ch); static void stli_hangup(struct tty_struct *tty); -static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos); static int stli_brdinit(struct stlibrd *brdp); static int stli_startbrd(struct stlibrd *brdp); @@ -1893,20 +1893,10 @@ static void stli_sendxchar(struct tty_struct *tty, char ch) stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0); } -/*****************************************************************************/ - -#define MAXLINE 80 - -/* - * Format info for a specified port. The line is deliberately limited - * to 80 characters. (If it is too long it will be truncated, if too - * short then padded with spaces). - */ - -static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos) +static void stli_portinfo(struct seq_file *m, struct stlibrd *brdp, struct stliport *portp, int portnr) { - char *sp, *uart; - int rc, cnt; + char *uart; + int rc; rc = stli_portcmdstats(NULL, portp); @@ -1918,44 +1908,50 @@ static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portn default:uart = "CD1400"; break; } } - - sp = pos; - sp += sprintf(sp, "%d: uart:%s ", portnr, uart); + seq_printf(m, "%d: uart:%s ", portnr, uart); if ((brdp->state & BST_STARTED) && (rc >= 0)) { - sp += sprintf(sp, "tx:%d rx:%d", (int) stli_comstats.txtotal, + char sep; + + seq_printf(m, "tx:%d rx:%d", (int) stli_comstats.txtotal, (int) stli_comstats.rxtotal); if (stli_comstats.rxframing) - sp += sprintf(sp, " fe:%d", + seq_printf(m, " fe:%d", (int) stli_comstats.rxframing); if (stli_comstats.rxparity) - sp += sprintf(sp, " pe:%d", + seq_printf(m, " pe:%d", (int) stli_comstats.rxparity); if (stli_comstats.rxbreaks) - sp += sprintf(sp, " brk:%d", + seq_printf(m, " brk:%d", (int) stli_comstats.rxbreaks); if (stli_comstats.rxoverrun) - sp += sprintf(sp, " oe:%d", + seq_printf(m, " oe:%d", (int) stli_comstats.rxoverrun); - cnt = sprintf(sp, "%s%s%s%s%s ", - (stli_comstats.signals & TIOCM_RTS) ? "|RTS" : "", - (stli_comstats.signals & TIOCM_CTS) ? "|CTS" : "", - (stli_comstats.signals & TIOCM_DTR) ? "|DTR" : "", - (stli_comstats.signals & TIOCM_CD) ? "|DCD" : "", - (stli_comstats.signals & TIOCM_DSR) ? "|DSR" : ""); - *sp = ' '; - sp += cnt; + sep = ' '; + if (stli_comstats.signals & TIOCM_RTS) { + seq_printf(m, "%c%s", sep, "RTS"); + sep = '|'; + } + if (stli_comstats.signals & TIOCM_CTS) { + seq_printf(m, "%c%s", sep, "CTS"); + sep = '|'; + } + if (stli_comstats.signals & TIOCM_DTR) { + seq_printf(m, "%c%s", sep, "DTR"); + sep = '|'; + } + if (stli_comstats.signals & TIOCM_CD) { + seq_printf(m, "%c%s", sep, "DCD"); + sep = '|'; + } + if (stli_comstats.signals & TIOCM_DSR) { + seq_printf(m, "%c%s", sep, "DSR"); + sep = '|'; + } } - - for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) - *sp++ = ' '; - if (cnt >= MAXLINE) - pos[(MAXLINE - 2)] = '+'; - pos[(MAXLINE - 1)] = '\n'; - - return(MAXLINE); + seq_putc(m, '\n'); } /*****************************************************************************/ @@ -1964,26 +1960,15 @@ static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portn * Port info, read from the /proc file system. */ -static int stli_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) +static int stli_proc_show(struct seq_file *m, void *v) { struct stlibrd *brdp; struct stliport *portp; unsigned int brdnr, portnr, totalport; - int curoff, maxoff; - char *pos; - pos = page; totalport = 0; - curoff = 0; - - if (off == 0) { - pos += sprintf(pos, "%s: version %s", stli_drvtitle, - stli_drvversion); - while (pos < (page + MAXLINE - 1)) - *pos++ = ' '; - *pos++ = '\n'; - } - curoff = MAXLINE; + + seq_printf(m, "%s: version %s\n", stli_drvtitle, stli_drvversion); /* * We scan through for each board, panel and port. The offset is @@ -1996,33 +1981,31 @@ static int stli_readproc(char *page, char **start, off_t off, int count, int *eo if (brdp->state == 0) continue; - maxoff = curoff + (brdp->nrports * MAXLINE); - if (off >= maxoff) { - curoff = maxoff; - continue; - } - totalport = brdnr * STL_MAXPORTS; for (portnr = 0; (portnr < brdp->nrports); portnr++, totalport++) { portp = brdp->ports[portnr]; if (portp == NULL) continue; - if (off >= (curoff += MAXLINE)) - continue; - if ((pos - page + MAXLINE) > count) - goto stli_readdone; - pos += stli_portinfo(brdp, portp, totalport, pos); + stli_portinfo(m, brdp, portp, totalport); } } + return 0; +} - *eof = 1; - -stli_readdone: - *start = page; - return(pos - page); +static int stli_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, stli_proc_show, NULL); } +static const struct file_operations stli_proc_fops = { + .owner = THIS_MODULE, + .open = stli_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + /*****************************************************************************/ /* @@ -4427,9 +4410,9 @@ static const struct tty_operations stli_ops = { .break_ctl = stli_breakctl, .wait_until_sent = stli_waituntilsent, .send_xchar = stli_sendxchar, - .read_proc = stli_readproc, .tiocmget = stli_tiocmget, .tiocmset = stli_tiocmset, + .proc_fops = &stli_proc_fops, }; static const struct tty_port_operations stli_port_ops = { |