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Commit 86d61b33 authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Dan Williams
Browse files

sh: stylistic improvements for the DMA driver 



Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent cfe4f275

drivers/dma/shdma.c

+17 −17
Original line number Diff line number Diff line
@@ -80,17 +80,17 @@ static int sh_dmae_rst(int id) 
	unsigned short dmaor;



	sh_dmae_ctl_stop(id);

	dmaor = (dmaor_read_reg(id)|DMAOR_INIT);

	dmaor = dmaor_read_reg(id) | DMAOR_INIT;



	dmaor_write_reg(id, dmaor);

	if ((dmaor_read_reg(id) & (DMAOR_AE | DMAOR_NMIF))) {

	if (dmaor_read_reg(id) & (DMAOR_AE | DMAOR_NMIF)) {

		pr_warning(KERN_ERR "dma-sh: Can't initialize DMAOR.\n");

		return -EINVAL;

	}

	return 0;

}



static int dmae_is_idle(struct sh_dmae_chan *sh_chan)

static int dmae_is_busy(struct sh_dmae_chan *sh_chan)

{

	u32 chcr = sh_dmae_readl(sh_chan, CHCR);

	if (chcr & CHCR_DE) {
@@ -110,15 +110,14 @@ static void dmae_set_reg(struct sh_dmae_chan *sh_chan, struct sh_dmae_regs hw) 
{

	sh_dmae_writel(sh_chan, hw.sar, SAR);

	sh_dmae_writel(sh_chan, hw.dar, DAR);

	sh_dmae_writel(sh_chan,

		(hw.tcr >> calc_xmit_shift(sh_chan)), TCR);

	sh_dmae_writel(sh_chan, hw.tcr >> calc_xmit_shift(sh_chan), TCR);

}



static void dmae_start(struct sh_dmae_chan *sh_chan)

{

	u32 chcr = sh_dmae_readl(sh_chan, CHCR);



	chcr |= (CHCR_DE|CHCR_IE);

	chcr |= CHCR_DE | CHCR_IE;

	sh_dmae_writel(sh_chan, chcr, CHCR);

}
@@ -132,7 +131,7 @@ static void dmae_halt(struct sh_dmae_chan *sh_chan) 


static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)

{

	int ret = dmae_is_idle(sh_chan);

	int ret = dmae_is_busy(sh_chan);

	/* When DMA was working, can not set data to CHCR */

	if (ret)

		return ret;
@@ -149,7 +148,7 @@ static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val) 
{

	u32 addr;

	int shift = 0;

	int ret = dmae_is_idle(sh_chan);

	int ret = dmae_is_busy(sh_chan);

	if (ret)

		return ret;
@@ -388,7 +387,7 @@ static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan) 
	struct sh_dmae_regs hw;



	/* DMA work check */

	if (dmae_is_idle(sh_chan))

	if (dmae_is_busy(sh_chan))

		return;



	/* Find the first un-transfer desciptor */
@@ -497,6 +496,7 @@ static void dmae_do_tasklet(unsigned long data) 
	struct sh_dmae_chan *sh_chan = (struct sh_dmae_chan *)data;

	struct sh_desc *desc, *_desc, *cur_desc = NULL;

	u32 sar_buf = sh_dmae_readl(sh_chan, SAR);



	list_for_each_entry_safe(desc, _desc,

				 &sh_chan->ld_queue, node) {

		if ((desc->hw.sar + desc->hw.tcr) == sar_buf) {
@@ -543,8 +543,8 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id) 
	/* alloc channel */

	new_sh_chan = kzalloc(sizeof(struct sh_dmae_chan), GFP_KERNEL);

	if (!new_sh_chan) {

		dev_err(shdev->common.dev, "No free memory for allocating "

				"dma channels!\n");

		dev_err(shdev->common.dev,

			"No free memory for allocating dma channels!\n");

		return -ENOMEM;

	}
@@ -586,8 +586,8 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id) 
			"sh-dmae%d", new_sh_chan->id);



	/* set up channel irq */

	err = request_irq(irq, &sh_dmae_interrupt,

		irqflags, new_sh_chan->dev_id, new_sh_chan);

	err = request_irq(irq, &sh_dmae_interrupt, irqflags,

			  new_sh_chan->dev_id, new_sh_chan);

	if (err) {

		dev_err(shdev->common.dev, "DMA channel %d request_irq error "

			"with return %d\n", id, err);
@@ -691,8 +691,8 @@ static int __init sh_dmae_probe(struct platform_device *pdev) 
	}



	for (ecnt = 0 ; ecnt < ARRAY_SIZE(eirq); ecnt++) {

		err = request_irq(eirq[ecnt], sh_dmae_err,

			irqflags, "DMAC Address Error", shdev);

		err = request_irq(eirq[ecnt], sh_dmae_err, irqflags,

				  "DMAC Address Error", shdev);

		if (err) {

			dev_err(&pdev->dev, "DMA device request_irq"

				"error (irq %d) with return %d\n",

drivers/dma/shdma.h

+7 −7

File changed.

Contains only whitespace changes.