Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 30 insertions, 7 deletions

diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index 6dc107f25245..f70c5a577736 100644
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c
@@ -91,7 +91,7 @@ static struct dma_channel *dma_channel_allocate(struct dma_controller *c,
                         channel = &(musb_channel->channel);
                         channel->private_data = musb_channel;
                         channel->status = MUSB_DMA_STATUS_FREE;
-                        channel->max_len = 0x10000;
+                        channel->max_len = 0x100000;
                         /* Tx => mode 1; Rx => mode 0 */
                         channel->desired_mode = transmit;
                         channel->actual_len = 0;
@@ -122,11 +122,12 @@ static void configure_channel(struct dma_channel *channel,
 {
         struct musb_dma_channel *musb_channel = channel->private_data;
         struct musb_dma_controller *controller = musb_channel->controller;
+        struct musb *musb = controller->private_data;
         void __iomem *mbase = controller->base;
         u8 bchannel = musb_channel->idx;
         u16 csr = 0;
 
-        DBG(4, "%p, pkt_sz %d, addr 0x%x, len %d, mode %d\n",
+        dev_dbg(musb->controller, "%p, pkt_sz %d, addr 0x%x, len %d, mode %d\n",
                         channel, packet_sz, dma_addr, len, mode);
 
         if (mode) {
@@ -158,8 +159,10 @@ static int dma_channel_program(struct dma_channel *channel,
                                 dma_addr_t dma_addr, u32 len)
 {
         struct musb_dma_channel *musb_channel = channel->private_data;
+        struct musb_dma_controller *controller = musb_channel->controller;
+        struct musb *musb = controller->private_data;
 
-        DBG(2, "ep%d-%s pkt_sz %d, dma_addr 0x%x length %d, mode %d\n",
+        dev_dbg(musb->controller, "ep%d-%s pkt_sz %d, dma_addr 0x%x length %d, mode %d\n",
                 musb_channel->epnum,
                 musb_channel->transmit ? "Tx" : "Rx",
                 packet_sz, dma_addr, len, mode);
@@ -167,6 +170,26 @@ static int dma_channel_program(struct dma_channel *channel,
         BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN ||
                 channel->status == MUSB_DMA_STATUS_BUSY);
 
+        /* Let targets check/tweak the arguments */
+        if (musb->ops->adjust_channel_params) {
+                int ret = musb->ops->adjust_channel_params(channel,
+                        packet_sz, &mode, &dma_addr, &len);
+                if (ret)
+                        return ret;
+        }
+
+        /*
+         * The DMA engine in RTL1.8 and above cannot handle
+         * DMA addresses that are not aligned to a 4 byte boundary.
+         * It ends up masking the last two bits of the address
+         * programmed in DMA_ADDR.
+         *
+         * Fail such DMA transfers, so that the backup PIO mode
+         * can carry out the transfer
+         */
+        if ((musb->hwvers >= MUSB_HWVERS_1800) && (dma_addr % 4))
+                return false;
+
         channel->actual_len = 0;
         musb_channel->start_addr = dma_addr;
         musb_channel->len = len;
@@ -252,7 +275,7 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
 #endif
 
         if (!int_hsdma) {
-                DBG(2, "spurious DMA irq\n");
+                dev_dbg(musb->controller, "spurious DMA irq\n");
 
                 for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) {
                         musb_channel = (struct musb_dma_channel *)
@@ -266,7 +289,7 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
                         }
                 }
 
-                DBG(2, "int_hsdma = 0x%x\n", int_hsdma);
+                dev_dbg(musb->controller, "int_hsdma = 0x%x\n", int_hsdma);
 
                 if (!int_hsdma)
                         goto done;
@@ -293,7 +316,7 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
                                 channel->actual_len = addr
                                         - musb_channel->start_addr;
 
-                                DBG(2, "ch %p, 0x%x -> 0x%x (%zu / %d) %s\n",
+                                dev_dbg(musb->controller, "ch %p, 0x%x -> 0x%x (%zu / %d) %s\n",
                                         channel, musb_channel->start_addr,
                                         addr, channel->actual_len,
                                         musb_channel->len,
@@ -363,7 +386,7 @@ dma_controller_create(struct musb *musb, void __iomem *base)
         struct musb_dma_controller *controller;
         struct device *dev = musb->controller;
         struct platform_device *pdev = to_platform_device(dev);
-        int irq = platform_get_irq(pdev, 1);
+        int irq = platform_get_irq_byname(pdev, "dma");
 
         if (irq == 0) {
                 dev_err(dev, "No DMA interrupt line!\n");