[PATCH] staging: b3dfg: endianess

[Vasilis Liaskovitis]

I believe some endian conversions are needed for the card to work with big endian hosts. 
Not tested, feedback kindly requested.

Signed-off-by: Vasilis Liaskovitis <vliaskov at gmail.com>
Index: linux-next/drivers/staging/b3dfg/b3dfg.c
===================================================================
--- linux-next.orig/drivers/staging/b3dfg/b3dfg.c	2009-09-22 00:50:40.000000000 -0500
+++ linux-next/drivers/staging/b3dfg/b3dfg.c	2009-09-22 00:53:54.000000000 -0500
@@ -214,7 +214,7 @@
 					cpu_to_le32(frm_addr_dma));
 	b3dfg_write32(fgdev, B3D_REG_EC220_TRF_SIZE,
 					cpu_to_le32(frm_size >> 2));
-	b3dfg_write32(fgdev, B3D_REG_EC220_DMA_STS, 0xf);
+	b3dfg_write32(fgdev, B3D_REG_EC220_DMA_STS, cpu_to_le32(0xf));
 
 	return 0;
 }
@@ -460,7 +460,7 @@
 
 static int get_wand_status(struct b3dfg_dev *fgdev, int __user *arg)
 {
-	u32 wndstat = b3dfg_read32(fgdev, B3D_REG_WAND_STS);
+	u32 wndstat = le32_to_cpu(b3dfg_read32(fgdev, B3D_REG_WAND_STS));
 	dev_dbg(&fgdev->pdev->dev, "wand status %x\n", wndstat);
 	return __put_user(wndstat & 0x1, arg);
 }
@@ -474,7 +474,7 @@
 	dev_dbg(dev, "enable transmission\n");
 
 	/* check the cable is plugged in. */
-	if (!b3dfg_read32(fgdev, B3D_REG_WAND_STS)) {
+	if (!le32_to_cpu(b3dfg_read32(fgdev, B3D_REG_WAND_STS))) {
 		dev_dbg(dev, "cannot start transmission without wand\n");
 		return -EINVAL;
 	}
@@ -509,7 +509,7 @@
 	spin_unlock_irqrestore(&fgdev->buffer_lock, flags);
 
 	/* Enable DMA and cable status interrupts. */
-	b3dfg_write32(fgdev, B3D_REG_HW_CTRL, 0x03);
+	b3dfg_write32(fgdev, B3D_REG_HW_CTRL, cpu_to_le32(0x03));
 
 out:
 	return 0;
@@ -532,7 +532,7 @@
 	/* FIXME: temporary debugging only. if the board stops transmitting,
 	 * hitting ctrl+c and seeing this message is useful for determining
 	 * the state of the board. */
-	tmp = b3dfg_read32(fgdev, B3D_REG_DMA_STS);
+	tmp = le32_to_cpu(b3dfg_read32(fgdev, B3D_REG_DMA_STS));
 	dev_dbg(dev, "DMA_STS reads %x after TX stopped\n", tmp);
 
 	dequeue_all_buffers(fgdev);
@@ -577,7 +577,7 @@
 /* Called in interrupt context. */
 static void handle_cstate_change(struct b3dfg_dev *fgdev)
 {
-	u32 cstate = b3dfg_read32(fgdev, B3D_REG_WAND_STS);
+	u32 cstate = le32_to_cpu(b3dfg_read32(fgdev, B3D_REG_WAND_STS));
 	unsigned long when;
 	struct device *dev = &fgdev->pdev->dev;
 
@@ -683,7 +683,7 @@
 	bool need_ack = 1;
 	irqreturn_t res = IRQ_HANDLED;
 
-	sts = b3dfg_read32(fgdev, B3D_REG_DMA_STS);
+	sts = le32_to_cpu(b3dfg_read32(fgdev, B3D_REG_DMA_STS));
 	if (unlikely(sts == 0)) {
 		dev_warn(dev, "ignore interrupt, DMA status is 0\n");
 		res = IRQ_NONE;
@@ -723,7 +723,8 @@
 
 	/* Has a frame transfer been completed? */
 	if (sts & 0x4) {
-		u32 dma_status = b3dfg_read32(fgdev, B3D_REG_EC220_DMA_STS);
+		u32 dma_status = le32_to_cpu(b3dfg_read32(fgdev,
+					B3D_REG_EC220_DMA_STS));
 
 		/* Check for DMA errors reported by the hardware. */
 		if (unlikely(dma_status & 0x1)) {
@@ -755,7 +756,7 @@
 out:
 	if (need_ack) {
 		dev_dbg(dev, "acknowledging interrupt\n");
-		b3dfg_write32(fgdev, B3D_REG_EC220_DMA_STS, 0x0b);
+		b3dfg_write32(fgdev, B3D_REG_EC220_DMA_STS, cpu_to_le32(0x0b));
 	}
 	return res;
 }
@@ -870,7 +871,7 @@
 static int b3dfg_init_dev(struct b3dfg_dev *fgdev)
 {
 	int i, j;
-	u32 frm_size = b3dfg_read32(fgdev, B3D_REG_FRM_SIZE);
+	u32 frm_size = le32_to_cpu(b3dfg_read32(fgdev, B3D_REG_FRM_SIZE));
 
 	/* Disable interrupts. In abnormal circumstances (e.g. after a crash)
 	 * the board may still be transmitting from the previous session. If we