linux-kernel - [PATCH v3 07/12] dma: edma: Add function to dump a PaRAM set from PaRAM

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Date:	Mon, 5 Aug 2013 11:14:52 -0500
From:	Joel Fernandes <joelf@...com>
To:	Tony Lindgren <tony@...mide.com>, Sekhar Nori <nsekhar@...com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Sricharan R <r.sricharan@...com>,
	Rajendra Nayak <rnayak@...com>,
	Lokesh Vutla <lokeshvutla@...com>,
	Matt Porter <matt@...orter.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
	Mark Brown <broonie@...aro.org>,
	Benoit Cousson <benoit.cousson@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	Balaji TK <balajitk@...com>,
	Gururaja Hebbar <gururaja.hebbar@...com>,
	Chris Ball <cjb@...top.org>,
	Jason Kridner <jkridner@...gleboard.org>
CC:	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Joel Fernandes <joelf@...com>
Subject: [PATCH v3 07/12] dma: edma: Add function to dump a PaRAM set from PaRAM

Previously, such a dump function was used but it wasn't reading
from the PaRAM, rather just from a edmacc_param structure, we
add a helpful function for debugging that directly reads from
the PaRAM and gives the current state correctly (including links
and interrupt information).

Signed-off-by: Joel Fernandes <joelf@...com>
---
 drivers/dma/edma.c |   31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 080d669..a242269 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -102,6 +102,37 @@ static void edma_desc_free(struct virt_dma_desc *vdesc)
 	kfree(container_of(vdesc, struct edma_desc, vdesc));
 }
 
+static inline void dump_pset(struct edma_chan *echan, int slot,
+		     struct edmacc_param *pset_unused, int pset_idx)
+{
+	struct edmacc_param pset_local, *pset;
+	pset = &pset_local;
+
+	edma_read_slot(slot, pset);
+
+	dev_dbg(echan->vchan.chan.device->dev,
+		"\n pset[%d]:\n"
+		"  chnum\t%d\n"
+		"  slot\t%d\n"
+		"  opt\t%08x\n"
+		"  src\t%08x\n"
+		"  dst\t%08x\n"
+		"  abcnt\t%08x\n"
+		"  ccnt\t%08x\n"
+		"  bidx\t%08x\n"
+		"  cidx\t%08x\n"
+		"  lkrld\t%08x\n",
+		pset_idx, echan->ch_num, slot,
+		pset[0].opt,
+		pset[0].src,
+		pset[0].dst,
+		pset[0].a_b_cnt,
+		pset[0].ccnt,
+		pset[0].src_dst_bidx,
+		pset[0].src_dst_cidx,
+		pset[0].link_bcntrld);
+}
+
 /* Dispatch a queued descriptor to the controller (caller holds lock) */
 static void edma_execute(struct edma_chan *echan)
 {
-- 
1.7.9.5

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