linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Alexey Dobriyan <adobriyan@gmail.com>
To: akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 06/17] proc tty: switch stallion to ->proc_fops
Date: Thu, 29 Jan 2009 20:50:37 +0300	[thread overview]
Message-ID: <20090129175037.GF21643@x200.localdomain> (raw)
In-Reply-To: <20090129174830.GA21643@x200.localdomain>

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
 drivers/char/stallion.c |  126 +++++++++++++++++++----------------------------
 1 files changed, 50 insertions(+), 76 deletions(-)

diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index e1e0dd8..2ad813a 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -32,6 +32,7 @@
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 #include <linux/serial.h>
+#include <linux/seq_file.h>
 #include <linux/cd1400.h>
 #include <linux/sc26198.h>
 #include <linux/comstats.h>
@@ -1379,52 +1380,47 @@ static void stl_sendxchar(struct tty_struct *tty, char ch)
 		stl_putchar(tty, ch);
 }
 
-/*****************************************************************************/
-
-#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 stl_portinfo(struct stlport *portp, int portnr, char *pos)
+static void stl_portinfo(struct seq_file *m, struct stlport *portp, int portnr)
 {
-	char	*sp;
-	int	sigs, cnt;
+	int	sigs;
+	char sep;
 
-	sp = pos;
-	sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
+	seq_printf(m, "%d: uart:%s tx:%d rx:%d",
 		portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
 		(int) portp->stats.txtotal, (int) portp->stats.rxtotal);
 
 	if (portp->stats.rxframing)
-		sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
+		seq_printf(m, " fe:%d", (int) portp->stats.rxframing);
 	if (portp->stats.rxparity)
-		sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
+		seq_printf(m, " pe:%d", (int) portp->stats.rxparity);
 	if (portp->stats.rxbreaks)
-		sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
+		seq_printf(m, " brk:%d", (int) portp->stats.rxbreaks);
 	if (portp->stats.rxoverrun)
-		sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
+		seq_printf(m, " oe:%d", (int) portp->stats.rxoverrun);
 
 	sigs = stl_getsignals(portp);
-	cnt = sprintf(sp, "%s%s%s%s%s ",
-		(sigs & TIOCM_RTS) ? "|RTS" : "",
-		(sigs & TIOCM_CTS) ? "|CTS" : "",
-		(sigs & TIOCM_DTR) ? "|DTR" : "",
-		(sigs & TIOCM_CD) ? "|DCD" : "",
-		(sigs & TIOCM_DSR) ? "|DSR" : "");
-	*sp = ' ';
-	sp += cnt;
-
-	for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
-		*sp++ = ' ';
-	if (cnt >= MAXLINE)
-		pos[(MAXLINE - 2)] = '+';
-	pos[(MAXLINE - 1)] = '\n';
-
-	return MAXLINE;
+	sep = ' ';
+	if (sigs & TIOCM_RTS) {
+		seq_printf(m, "%c%s", sep, "RTS");
+		sep = '|';
+	}
+	if (sigs & TIOCM_CTS) {
+		seq_printf(m, "%c%s", sep, "CTS");
+		sep = '|';
+	}
+	if (sigs & TIOCM_DTR) {
+		seq_printf(m, "%c%s", sep, "DTR");
+		sep = '|';
+	}
+	if (sigs & TIOCM_CD) {
+		seq_printf(m, "%c%s", sep, "DCD");
+		sep = '|';
+	}
+	if (sigs & TIOCM_DSR) {
+		seq_printf(m, "%c%s", sep, "DSR");
+		sep = '|';
+	}
+	seq_putc(m, '\n');
 }
 
 /*****************************************************************************/
@@ -1433,30 +1429,17 @@ static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
  *	Port info, read from the /proc file system.
  */
 
-static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
+static int stl_proc_show(struct seq_file *m, void *v)
 {
 	struct stlbrd	*brdp;
 	struct stlpanel	*panelp;
 	struct stlport	*portp;
 	unsigned int	brdnr, panelnr, portnr;
-	int		totalport, curoff, maxoff;
-	char		*pos;
+	int		totalport;
 
-	pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
-		"data=%p\n", page, start, off, count, eof, data);
-
-	pos = page;
 	totalport = 0;
-	curoff = 0;
-
-	if (off == 0) {
-		pos += sprintf(pos, "%s: version %s", stl_drvtitle,
-			stl_drvversion);
-		while (pos < (page + MAXLINE - 1))
-			*pos++ = ' ';
-		*pos++ = '\n';
-	}
-	curoff =  MAXLINE;
+
+	seq_printf(m, "%s: version %s\n", stl_drvtitle, stl_drvversion);
 
 /*
  *	We scan through for each board, panel and port. The offset is
@@ -1469,46 +1452,37 @@ static int stl_readproc(char *page, char **start, off_t off, int count, int *eof
 		if (brdp->state == 0)
 			continue;
 
-		maxoff = curoff + (brdp->nrports * MAXLINE);
-		if (off >= maxoff) {
-			curoff = maxoff;
-			continue;
-		}
-
 		totalport = brdnr * STL_MAXPORTS;
 		for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
 			panelp = brdp->panels[panelnr];
 			if (panelp == NULL)
 				continue;
 
-			maxoff = curoff + (panelp->nrports * MAXLINE);
-			if (off >= maxoff) {
-				curoff = maxoff;
-				totalport += panelp->nrports;
-				continue;
-			}
-
 			for (portnr = 0; portnr < panelp->nrports; portnr++,
 			    totalport++) {
 				portp = panelp->ports[portnr];
 				if (portp == NULL)
 					continue;
-				if (off >= (curoff += MAXLINE))
-					continue;
-				if ((pos - page + MAXLINE) > count)
-					goto stl_readdone;
-				pos += stl_portinfo(portp, totalport, pos);
+				stl_portinfo(m, portp, totalport);
 			}
 		}
 	}
+	return 0;
+}
 
-	*eof = 1;
-
-stl_readdone:
-	*start = page;
-	return pos - page;
+static int stl_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, stl_proc_show, NULL);
 }
 
+static const struct file_operations stl_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= stl_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 /*****************************************************************************/
 
 /*
@@ -2566,9 +2540,9 @@ static const struct tty_operations stl_ops = {
 	.break_ctl = stl_breakctl,
 	.wait_until_sent = stl_waituntilsent,
 	.send_xchar = stl_sendxchar,
-	.read_proc = stl_readproc,
 	.tiocmget = stl_tiocmget,
 	.tiocmset = stl_tiocmset,
+	.proc_fops = &stl_proc_fops,
 };
 
 static const struct tty_port_operations stl_port_ops = {
-- 
1.5.6.5


  parent reply	other threads:[~2009-01-29 17:45 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-01-29 17:48 [PATCH 01/17] proc tty: add struct tty_operations::proc_fops Alexey Dobriyan
2009-01-29 17:49 ` [PATCH 02/17] proc tty: switch cyclades to ->proc_fops Alexey Dobriyan
2009-01-29 17:49 ` [PATCH 03/17] proc tty: switch ip2 " Alexey Dobriyan
2009-01-29 17:49 ` [PATCH 04/17] proc tty: switch istallion " Alexey Dobriyan
2009-01-29 17:50 ` [PATCH 05/17] proc tty: switch synclink_cs " Alexey Dobriyan
2009-01-29 17:50 ` Alexey Dobriyan [this message]
2009-01-29 17:50 ` [PATCH 07/17] proc tty: switch synclink " Alexey Dobriyan
2009-01-29 17:51 ` [PATCH 08/17] proc tty: switch synclink_gt " Alexey Dobriyan
2009-01-29 17:51 ` [PATCH 09/17] proc tty: switch synclinkmp " Alexey Dobriyan
2009-01-29 17:53 ` [PATCH 10/17] proc tty: switch sdio_uart " Alexey Dobriyan
2009-01-29 17:53 ` [PATCH 11/17] proc tty: switch serial_core " Alexey Dobriyan
2009-01-29 17:54 ` [PATCH 12/17] proc tty: switch usb-serial " Alexey Dobriyan
2009-01-29 17:54 ` [PATCH 13/17] proc tty: switch ircomm " Alexey Dobriyan
2009-01-29 17:54 ` [PATCH 14/17] proc tty: switch amiserial " Alexey Dobriyan
2009-01-29 17:55 ` [PATCH 15/17] proc tty: switch ia64 simserial " Alexey Dobriyan
2009-01-29 17:55 ` [PATCH 16/17] proc tty: switch xtensa iss console " Alexey Dobriyan
2009-01-29 17:55 ` [PATCH 17/17] proc tty: remove struct tty_operations::read_proc Alexey Dobriyan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20090129175037.GF21643@x200.localdomain \
    --to=adobriyan@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=alan@lxorguk.ukuu.org.uk \
    --cc=linux-kernel@vger.kernel.org \
    --subject='Re: [PATCH 06/17] proc tty: switch stallion to ->proc_fops' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
on how to clone and mirror all data and code used for this inbox