path: root/recipes/linux/linux-kexecboot-2.6.24/tosa/0017-Convert-pxa2xx-UDC-to-use-debugfs.patch

From 71857e8f6c4a8d2d3eac3037f02e0c30c6fdb37e Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dbaryshkov@gmail.com>
Date: Wed, 9 Jan 2008 01:43:28 +0300
Subject: [PATCH 17/64] Convert pxa2xx UDC to use debugfs

Use debugfs instead of /proc/driver/udc

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
---
 drivers/usb/gadget/pxa2xx_udc.c |  100 +++++++++++++++++----------------------
 drivers/usb/gadget/pxa2xx_udc.h |   10 +++-
 2 files changed, 51 insertions(+), 59 deletions(-)

diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c
index 4f7d4ef..2900556 100644
--- a/drivers/usb/gadget/pxa2xx_udc.c
+++ b/drivers/usb/gadget/pxa2xx_udc.c
@@ -38,13 +38,14 @@
 #include <linux/timer.h>
 #include <linux/list.h>
 #include <linux/interrupt.h>
-#include <linux/proc_fs.h>
 #include <linux/mm.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/irq.h>
 #include <linux/clk.h>
 #include <linux/err.h>
+#include <linux/seq_file.h>
+#include <linux/debugfs.h>
 
 #include <asm/byteorder.h>
 #include <asm/dma.h>
@@ -993,45 +994,36 @@ static const struct usb_gadget_ops pxa2xx_udc_ops = {
 
 /*-------------------------------------------------------------------------*/
 
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-static const char proc_node_name [] = "driver/udc";
+#ifdef CONFIG_USB_GADGET_DEBUG_FS
 
+static struct pxa2xx_udc memory;
 static int
-udc_proc_read(char *page, char **start, off_t off, int count,
-		int *eof, void *_dev)
+udc_seq_show(struct seq_file *m, void *d)
 {
-	char			*buf = page;
-	struct pxa2xx_udc	*dev = _dev;
-	char			*next = buf;
-	unsigned		size = count;
+	struct pxa2xx_udc	*dev = m->private;
 	unsigned long		flags;
-	int			i, t;
+	int			i;
 	u32			tmp;
 
-	if (off != 0)
-		return 0;
+
+	BUG_ON(dev == NULL);
 
 	local_irq_save(flags);
 
 	/* basic device status */
-	t = scnprintf(next, size, DRIVER_DESC "\n"
+	seq_printf(m, DRIVER_DESC "\n"
 		"%s version: %s\nGadget driver: %s\nHost %s\n\n",
 		driver_name, DRIVER_VERSION SIZE_STR "(pio)",
 		dev->driver ? dev->driver->driver.name : "(none)",
 		is_vbus_present() ? "full speed" : "disconnected");
-	size -= t;
-	next += t;
 
 	/* registers for device and ep0 */
-	t = scnprintf(next, size,
+	seq_printf(m,
 		"uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
 		UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
-	size -= t;
-	next += t;
 
 	tmp = UDCCR;
-	t = scnprintf(next, size,
+	seq_printf(m,
 		"udccr %02X =%s%s%s%s%s%s%s%s\n", tmp,
 		(tmp & UDCCR_REM) ? " rem" : "",
 		(tmp & UDCCR_RSTIR) ? " rstir" : "",
@@ -1041,11 +1033,9 @@ udc_proc_read(char *page, char **start, off_t off, int count,
 		(tmp & UDCCR_RSM) ? " rsm" : "",
 		(tmp & UDCCR_UDA) ? " uda" : "",
 		(tmp & UDCCR_UDE) ? " ude" : "");
-	size -= t;
-	next += t;
 
 	tmp = UDCCS0;
-	t = scnprintf(next, size,
+	seq_printf(m,
 		"udccs0 %02X =%s%s%s%s%s%s%s%s\n", tmp,
 		(tmp & UDCCS0_SA) ? " sa" : "",
 		(tmp & UDCCS0_RNE) ? " rne" : "",
@@ -1055,28 +1045,22 @@ udc_proc_read(char *page, char **start, off_t off, int count,
 		(tmp & UDCCS0_FTF) ? " ftf" : "",
 		(tmp & UDCCS0_IPR) ? " ipr" : "",
 		(tmp & UDCCS0_OPR) ? " opr" : "");
-	size -= t;
-	next += t;
 
 	if (dev->has_cfr) {
 		tmp = UDCCFR;
-		t = scnprintf(next, size,
+		seq_printf(m,
 			"udccfr %02X =%s%s\n", tmp,
 			(tmp & UDCCFR_AREN) ? " aren" : "",
 			(tmp & UDCCFR_ACM) ? " acm" : "");
-		size -= t;
-		next += t;
 	}
 
 	if (!is_vbus_present() || !dev->driver)
 		goto done;
 
-	t = scnprintf(next, size, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n",
+	seq_printf(m, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n",
 		dev->stats.write.bytes, dev->stats.write.ops,
 		dev->stats.read.bytes, dev->stats.read.ops,
 		dev->stats.irqs);
-	size -= t;
-	next += t;
 
 	/* dump endpoint queues */
 	for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
@@ -1090,55 +1074,57 @@ udc_proc_read(char *page, char **start, off_t off, int count,
 			if (!d)
 				continue;
 			tmp = *dev->ep [i].reg_udccs;
-			t = scnprintf(next, size,
+			seq_printf(m,
 				"%s max %d %s udccs %02x irqs %lu\n",
 				ep->ep.name, le16_to_cpu (d->wMaxPacketSize),
 				"pio", tmp, ep->pio_irqs);
 			/* TODO translate all five groups of udccs bits! */
 
 		} else /* ep0 should only have one transfer queued */
-			t = scnprintf(next, size, "ep0 max 16 pio irqs %lu\n",
+			seq_printf(m, "ep0 max 16 pio irqs %lu\n",
 				ep->pio_irqs);
-		if (t <= 0 || t > size)
-			goto done;
-		size -= t;
-		next += t;
 
 		if (list_empty(&ep->queue)) {
-			t = scnprintf(next, size, "\t(nothing queued)\n");
-			if (t <= 0 || t > size)
-				goto done;
-			size -= t;
-			next += t;
+			seq_printf(m, "\t(nothing queued)\n");
 			continue;
 		}
 		list_for_each_entry(req, &ep->queue, queue) {
-			t = scnprintf(next, size,
+			seq_printf(m,
 					"\treq %p len %d/%d buf %p\n",
 					&req->req, req->req.actual,
 					req->req.length, req->req.buf);
-			if (t <= 0 || t > size)
-				goto done;
-			size -= t;
-			next += t;
 		}
 	}
 
 done:
 	local_irq_restore(flags);
-	*eof = 1;
-	return count - size;
+	return 0;
 }
 
-#define create_proc_files() \
-	create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev)
-#define remove_proc_files() \
-	remove_proc_entry(proc_node_name, NULL)
+static int
+udc_debugfs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, udc_seq_show, inode->i_private);
+}
+
+static const struct file_operations debug_fops = {
+	.open		= udc_debugfs_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.owner		= THIS_MODULE,
+};
+
+#define create_debug_files(dev) \
+	dev->debugfs_udc = debugfs_create_file(dev->gadget.name, S_IRUGO, \
+			NULL, dev, &debug_fops)
+#define remove_debug_files(dev) \
+	if (dev->debugfs_udc) debugfs_remove(dev->debugfs_udc)
 
 #else	/* !CONFIG_USB_GADGET_DEBUG_FILES */
 
-#define create_proc_files() do {} while (0)
-#define remove_proc_files() do {} while (0)
+#define create_debug_files(dev) do {} while (0)
+#define remove_debug_files(dev) do {} while (0)
 
 #endif	/* CONFIG_USB_GADGET_DEBUG_FILES */
 
@@ -2245,7 +2231,7 @@ lubbock_fail0:
 			goto err_vbus_irq;
 		}
 	}
-	create_proc_files();
+	create_debug_files(dev);
 
 	return 0;
 
@@ -2282,7 +2268,7 @@ static int __exit pxa2xx_udc_remove(struct platform_device *pdev)
 		return -EBUSY;
 
 	udc_disable(dev);
-	remove_proc_files();
+	remove_debug_files(dev);
 
 	if (dev->got_irq) {
 		free_irq(platform_get_irq(pdev, 0), dev);
diff --git a/drivers/usb/gadget/pxa2xx_udc.h b/drivers/usb/gadget/pxa2xx_udc.h
index 1db46d7..c08b1a2 100644
--- a/drivers/usb/gadget/pxa2xx_udc.h
+++ b/drivers/usb/gadget/pxa2xx_udc.h
@@ -129,6 +129,10 @@ struct pxa2xx_udc {
 	struct pxa2xx_udc_mach_info		*mach;
 	u64					dma_mask;
 	struct pxa2xx_ep			ep [PXA_UDC_NUM_ENDPOINTS];
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FS
+	struct dentry				*debugfs_udc;
+#endif
 };
 
 /*-------------------------------------------------------------------------*/
@@ -153,6 +157,8 @@ static struct pxa2xx_udc *the_controller;
 
 #ifdef DEBUG
 
+static int is_vbus_present(void);
+
 static const char *state_name[] = {
 	"EP0_IDLE",
 	"EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
@@ -207,8 +213,7 @@ dump_state(struct pxa2xx_udc *dev)
 	unsigned	i;
 
 	DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
-		//is_usb_connected() ? "host " : "disconnected",
-		"host ",
+		is_vbus_present() ? "host " : "disconnected",
 		state_name[dev->ep0state],
 		UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
 	dump_udccr("udccr");
@@ -224,7 +230,7 @@ dump_state(struct pxa2xx_udc *dev)
 	} else
 		DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
 
-	//if (!is_usb_connected())
-	//	return;
+	if (!is_vbus_present())
+		return;
 
 	dump_udccs0 ("udccs0");
-- 
1.5.3.8