From 76739fcc83cf63b1e3935d6c5bce966571a52ba1 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 31 Aug 2010 14:12:09 +0200 Subject: [PATCH 22/58] DMAENGINE: add debugfs file for PL08X This adds a debugfs file for the PL08X showing the current allocation of physical to virtual channels. Signed-off-by: Linus Walleij --- drivers/dma/amba-pl08x.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 57 insertions(+), 0 deletions(-) diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 65892d5..a99ad19 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -68,6 +68,8 @@ #include #include #include +#include +#include #include #include @@ -1806,6 +1808,60 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x, return i; } +#ifdef CONFIG_DEBUG_FS +static int pl08x_debugfs_show(struct seq_file *s, void *data) +{ + struct pl08x_driver_data *pl08x = s->private; + struct pl08x_phy_chan *ch; + unsigned long flags; + int i; + + seq_printf(s, "PL08x physical channels:\n"); + seq_printf(s, "CHANNEL:\tUSER:\n"); + seq_printf(s, "--------\t-----\n"); + for (i = 0; i < pl08x->vd->channels; i++) { + struct pl08x_dma_chan *virt_chan; + + ch = &pl08x->phy_chans[i]; + + spin_lock_irqsave(&ch->lock, flags); + virt_chan = ch->serving; + + seq_printf(s, "%d\t\t%s\n", + ch->id, virt_chan ? virt_chan->name : "(none)"); + + spin_unlock_irqrestore(&ch->lock, flags); + } + return 0; +} + +static int pl08x_debugfs_open(struct inode *inode, struct file *file) +{ + return single_open(file, pl08x_debugfs_show, inode->i_private); +} + +static const struct file_operations pl08x_debugfs_operations = { + .open = pl08x_debugfs_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void init_pl08x_debugfs(struct pl08x_driver_data *pl08x) +{ + /* Expose a simple debugfs interface to view all clocks */ + (void) debugfs_create_file(dev_name(&pl08x->adev->dev), S_IFREG | S_IRUGO, + NULL, pl08x, + &pl08x_debugfs_operations); + return 0; +} + +#else +static inline void init_pl08x_debugfs(struct pl08x_driver_data *pl08x) +{ +} +#endif + static int pl08x_probe(struct amba_device *adev, struct amba_id *id) { struct pl08x_driver_data *pl08x; @@ -1937,6 +1993,7 @@ static int pl08x_probe(struct amba_device *adev, struct amba_id *id) } amba_set_drvdata(adev, pl08x); + init_pl08x_debugfs(pl08x); dev_info(&pl08x->adev->dev, "ARM(R) %s DMA block initialized @%08x\n", vd->name, adev->res.start); return 0; -- 1.6.3.3