Merge branch 'rmobile-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6

* 'rmobile-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (34 commits)
  ARM: mach-shmobile: mackerel: add renesas_usbhs support for USB1
  ARM: mach-shmobile: Correct the G4EVM SDHI0 I/O range.
  ARM: arch-shmobile: sh7372: add renesas_usbhs irq support
  ARM: mach-shmobile: sh73a0: mark DMA slave ID 0 as invalid
  ARM: mach-shmobile: mark DMA slave ID 0 as invalid
  ARM: mach-shmobile: Enable DMAEngine for SDHI on AG5EVM
  ARM: mach-shmobile: Enable DMAEngine for MMCIF on AG5EVM
  ARM: mach-shmobile: sh73a0 DMA Engine support for SY-DMAC
  dmaengine: shdma: Update SH_DMAC_MAX_CHANNELS to 20
  dmaengine: shdma: Fix SH_DMAC_MAX_CHANNELS handling
  dmaengine: shdma: Make second memory window optional
  ARM: mach-shmobile: Tidy up after SH7372 pm changes.
  ARM: mach-shmobile: sh7372 Core Standby CPUIdle
  ARM: mach-shmobile: CPUIdle support
  ARM: mach-shmobile: sh7372 Core Standby Suspend-to-RAM
  ARM: mach-shmobile: Suspend-to-RAM support
  mailmap: Add entry for Damian Hobson-Garcia.
  ARM: switch mackerel to dynamically manage the platform camera
  ARM: mach-shmobile: Add SDHI support for AG5EVM and sh73a0
  ARM: arch-shmobile: Use multiple irq vectors for SDHI
  ...

2 files changed, 32 insertions, 12 deletions

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index dcc1b2139ff..636e40925b1 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -213,12 +213,17 @@ static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
 						struct sh_dmae_device, common);
 	struct sh_dmae_pdata *pdata = shdev->pdata;
 	const struct sh_dmae_channel *chan_pdata = &pdata->channel[sh_chan->id];
-	u16 __iomem *addr = shdev->dmars + chan_pdata->dmars / sizeof(u16);
+	u16 __iomem *addr = shdev->dmars;
 	int shift = chan_pdata->dmars_bit;
 
 	if (dmae_is_busy(sh_chan))
 		return -EBUSY;
 
+	/* in the case of a missing DMARS resource use first memory window */
+	if (!addr)
+		addr = (u16 __iomem *)shdev->chan_reg;
+	addr += chan_pdata->dmars / sizeof(u16);
+
 	__raw_writew((__raw_readw(addr) & (0xff00 >> shift)) | (val << shift),
 		     addr);
 
@@ -1078,7 +1083,7 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 	unsigned long irqflags = IRQF_DISABLED,
 		chan_flag[SH_DMAC_MAX_CHANNELS] = {};
 	int errirq, chan_irq[SH_DMAC_MAX_CHANNELS];
-	int err, i, irq_cnt = 0, irqres = 0;
+	int err, i, irq_cnt = 0, irqres = 0, irq_cap = 0;
 	struct sh_dmae_device *shdev;
 	struct resource *chan, *dmars, *errirq_res, *chanirq_res;
 
@@ -1087,7 +1092,7 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 		return -ENODEV;
 
 	chan = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	/* DMARS area is optional, if absent, this controller cannot do slave DMA */
+	/* DMARS area is optional */
 	dmars = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	/*
 	 * IRQ resources:
@@ -1154,7 +1159,7 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&shdev->common.channels);
 
 	dma_cap_set(DMA_MEMCPY, shdev->common.cap_mask);
-	if (dmars)
+	if (pdata->slave && pdata->slave_num)
 		dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
 
 	shdev->common.device_alloc_chan_resources
@@ -1203,8 +1208,13 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 	    !platform_get_resource(pdev, IORESOURCE_IRQ, 1)) {
 		/* Special case - all multiplexed */
 		for (; irq_cnt < pdata->channel_num; irq_cnt++) {
-			chan_irq[irq_cnt] = chanirq_res->start;
-			chan_flag[irq_cnt] = IRQF_SHARED;
+			if (irq_cnt < SH_DMAC_MAX_CHANNELS) {
+				chan_irq[irq_cnt] = chanirq_res->start;
+				chan_flag[irq_cnt] = IRQF_SHARED;
+			} else {
+				irq_cap = 1;
+				break;
+			}
 		}
 	} else {
 		do {
@@ -1218,22 +1228,32 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 					"Found IRQ %d for channel %d\n",
 					i, irq_cnt);
 				chan_irq[irq_cnt++] = i;
+
+				if (irq_cnt >= SH_DMAC_MAX_CHANNELS)
+					break;
+			}
+
+			if (irq_cnt >= SH_DMAC_MAX_CHANNELS) {
+				irq_cap = 1;
+				break;
 			}
 			chanirq_res = platform_get_resource(pdev,
 						IORESOURCE_IRQ, ++irqres);
 		} while (irq_cnt < pdata->channel_num && chanirq_res);
 	}
 
-	if (irq_cnt < pdata->channel_num)
-		goto eirqres;
-
 	/* Create DMA Channel */
-	for (i = 0; i < pdata->channel_num; i++) {
+	for (i = 0; i < irq_cnt; i++) {
 		err = sh_dmae_chan_probe(shdev, i, chan_irq[i], chan_flag[i]);
 		if (err)
 			goto chan_probe_err;
 	}
 
+	if (irq_cap)
+		dev_notice(&pdev->dev, "Attempting to register %d DMA "
+			   "channels when a maximum of %d are supported.\n",
+			   pdata->channel_num, SH_DMAC_MAX_CHANNELS);
+
 	pm_runtime_put(&pdev->dev);
 
 	platform_set_drvdata(pdev, shdev);
@@ -1243,7 +1263,7 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 
 chan_probe_err:
 	sh_dmae_chan_remove(shdev);
-eirqres:
+
 #if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
 	free_irq(errirq, shdev);
 eirq_err:
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 3f9d3cd0658..5ae9fc51218 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -17,7 +17,7 @@
 #include <linux/interrupt.h>
 #include <linux/list.h>
 
-#define SH_DMAC_MAX_CHANNELS 6
+#define SH_DMAC_MAX_CHANNELS 20
 #define SH_DMA_SLAVE_NUMBER 256
 #define SH_DMA_TCR_MAX 0x00FFFFFF	/* 16MB */