From: ppisa <ppisa>
Date: Sun, 26 Mar 2006 23:45:15 +0000 (+0000)
Subject: Added "chip_info" entry to the /proc/can/channelX, contributed by Sergei Sharonov.
X-Git-Tag: CLT_COMM_CAN-lincan-0_3_3~5
X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/commitdiff_plain/943dd337df47188d361c0f7f37c19184d73481eb

Added "chip_info" entry to the /proc/can/channelX, contributed by Sergei Sharonov.
Code is compatible with 2.6.x and 2.4.x Linux kernels.
It would fail on 2.2.x version. If its functionality is required,
can_remove_proc_entry() has to be used on pointer stored in
the new field and code emulating create_proc_read_entry()
has to be added.
---

diff --git a/lincan/src/proc.c b/lincan/src/proc.c
index e18e55a..3957e5f 100644
--- a/lincan/src/proc.c
+++ b/lincan/src/proc.c
@@ -174,6 +174,35 @@ int can_delete_procdir(void)
 	return 0;
 }
 
+static int can_chip_procinfo(char *buf, char **start, off_t offset, 
+		 int count, int *eof, void *data)
+{
+	struct canchip_t *chip=data;
+	int len=0;
+
+	/* Generic chip info */
+	len += sprintf(buf+len,"type    : %s\n",chip->chip_type);
+	len += sprintf(buf+len,"index   : %d\n",chip->chip_idx);
+	len += sprintf(buf+len,"irq     : %d\n",chip->chip_irq);
+	len += sprintf(buf+len,"addr    : %lu\n",chip->chip_base_addr);
+	len += sprintf(buf+len,"config  : %s\n",
+		       (chip->flags & CHIP_CONFIGURED) ? "yes":"no");
+	len += sprintf(buf+len,"clock   : %ld Hz\n",chip->clock);
+	len += sprintf(buf+len,"baud    : %ld\n",chip->baudrate);
+	len += sprintf(buf+len,"num obj : %d\n",chip->max_objects);
+
+
+#if 0
+	/* Chip specific info if available */
+	if(chip->chipspecops->get_info)
+		len += (chip->chipspecops->get_info)(chip,buf+len);
+#endif
+
+	*eof = 1;
+	return len;
+}
+
+
 int add_channel_to_procdir(struct candevice_t *candev)
 {
 	int i=0;
@@ -197,6 +226,12 @@ int add_channel_to_procdir(struct candevice_t *candev)
 
 		add_object_to_procdir(cc);
 
+		create_proc_read_entry("chip_info",        /* proc entry name */
+				       0,                  /* protection mask, 0->default */
+				       base->channel[cc]->ch_entry,  /* parent dir, NULL->/proc */
+				       can_chip_procinfo,
+				       candev->chip[i]);
+
 		cc++;
 	} 
 
@@ -210,6 +245,8 @@ int remove_channel_from_procdir(void)
 		cc--;
 		
 		if(!base->channel[cc]) continue;
+
+		remove_proc_entry("chip_info", base->channel[cc]->ch_entry);
 		
 		if (remove_object_from_procdir(cc))
 			return -ENODEV;