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-rw-r--r--drivers/usb/musb/blackfin.c1
-rw-r--r--drivers/usb/musb/musb_core.c10
-rw-r--r--drivers/usb/musb/musb_core.h12
-rw-r--r--drivers/usb/musb/musb_dma.h3
-rw-r--r--drivers/usb/musb/musb_gadget.c71
-rw-r--r--drivers/usb/musb/musb_gadget.h8
-rw-r--r--drivers/usb/musb/musb_host.c11
-rw-r--r--drivers/usb/musb/musbhsdma.h19
8 files changed, 93 insertions, 42 deletions
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index eeba228eb2af..9d49d1cd7ce2 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -404,6 +404,7 @@ static int bfin_musb_init(struct musb *musb)
musb->xceiv->set_power = bfin_musb_set_power;
musb->isr = blackfin_interrupt;
+ musb->double_buffer_not_ok = true;
return 0;
}
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 07cf394e491b..54a8bd1047d6 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -128,12 +128,7 @@ MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);
static inline struct musb *dev_to_musb(struct device *dev)
{
-#ifdef CONFIG_USB_MUSB_HDRC_HCD
- /* usbcore insists dev->driver_data is a "struct hcd *" */
- return hcd_to_musb(dev_get_drvdata(dev));
-#else
return dev_get_drvdata(dev);
-#endif
}
/*-------------------------------------------------------------------------*/
@@ -1876,10 +1871,9 @@ allocate_instance(struct device *dev,
musb = kzalloc(sizeof *musb, GFP_KERNEL);
if (!musb)
return NULL;
- dev_set_drvdata(dev, musb);
#endif
-
+ dev_set_drvdata(dev, musb);
musb->mregs = mbase;
musb->ctrl_base = mbase;
musb->nIrq = -ENODEV;
@@ -2191,7 +2185,7 @@ static int __init musb_probe(struct platform_device *pdev)
void __iomem *base;
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!iomem || irq == 0)
+ if (!iomem || irq <= 0)
return -ENODEV;
base = ioremap(iomem->start, resource_size(iomem));
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index d0c236f8e191..d74a8113ae74 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -488,6 +488,18 @@ struct musb {
unsigned set_address:1;
unsigned test_mode:1;
unsigned softconnect:1;
+ /*
+ * FIXME: Remove this flag.
+ *
+ * This is only added to allow Blackfin to work
+ * with current driver. For some unknown reason
+ * Blackfin doesn't work with double buffering
+ * and that's enabled by default.
+ *
+ * We added this flag to forcefully disable double
+ * buffering until we get it working.
+ */
+ unsigned double_buffer_not_ok:1 __deprecated;
u8 address;
u8 test_mode_nr;
diff --git a/drivers/usb/musb/musb_dma.h b/drivers/usb/musb/musb_dma.h
index 916065ba9e70..3a97c4e2d4f5 100644
--- a/drivers/usb/musb/musb_dma.h
+++ b/drivers/usb/musb/musb_dma.h
@@ -169,6 +169,9 @@ struct dma_controller {
dma_addr_t dma_addr,
u32 length);
int (*channel_abort)(struct dma_channel *);
+ int (*is_compatible)(struct dma_channel *channel,
+ u16 maxpacket,
+ void *buf, u32 length);
};
/* called after channel_program(), may indicate a fault */
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index ed58c6c8f15c..2fe304611dcf 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -92,11 +92,33 @@
/* ----------------------------------------------------------------------- */
+#define is_buffer_mapped(req) (is_dma_capable() && \
+ (req->map_state != UN_MAPPED))
+
/* Maps the buffer to dma */
static inline void map_dma_buffer(struct musb_request *request,
- struct musb *musb)
+ struct musb *musb, struct musb_ep *musb_ep)
{
+ int compatible = true;
+ struct dma_controller *dma = musb->dma_controller;
+
+ request->map_state = UN_MAPPED;
+
+ if (!is_dma_capable() || !musb_ep->dma)
+ return;
+
+ /* Check if DMA engine can handle this request.
+ * DMA code must reject the USB request explicitly.
+ * Default behaviour is to map the request.
+ */
+ if (dma->is_compatible)
+ compatible = dma->is_compatible(musb_ep->dma,
+ musb_ep->packet_sz, request->request.buf,
+ request->request.length);
+ if (!compatible)
+ return;
+
if (request->request.dma == DMA_ADDR_INVALID) {
request->request.dma = dma_map_single(
musb->controller,
@@ -105,7 +127,7 @@ static inline void map_dma_buffer(struct musb_request *request,
request->tx
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
- request->mapped = 1;
+ request->map_state = MUSB_MAPPED;
} else {
dma_sync_single_for_device(musb->controller,
request->request.dma,
@@ -113,7 +135,7 @@ static inline void map_dma_buffer(struct musb_request *request,
request->tx
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
- request->mapped = 0;
+ request->map_state = PRE_MAPPED;
}
}
@@ -121,11 +143,14 @@ static inline void map_dma_buffer(struct musb_request *request,
static inline void unmap_dma_buffer(struct musb_request *request,
struct musb *musb)
{
+ if (!is_buffer_mapped(request))
+ return;
+
if (request->request.dma == DMA_ADDR_INVALID) {
DBG(20, "not unmapping a never mapped buffer\n");
return;
}
- if (request->mapped) {
+ if (request->map_state == MUSB_MAPPED) {
dma_unmap_single(musb->controller,
request->request.dma,
request->request.length,
@@ -133,16 +158,15 @@ static inline void unmap_dma_buffer(struct musb_request *request,
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
request->request.dma = DMA_ADDR_INVALID;
- request->mapped = 0;
- } else {
+ } else { /* PRE_MAPPED */
dma_sync_single_for_cpu(musb->controller,
request->request.dma,
request->request.length,
request->tx
? DMA_TO_DEVICE
: DMA_FROM_DEVICE);
-
}
+ request->map_state = UN_MAPPED;
}
/*
@@ -172,8 +196,7 @@ __acquires(ep->musb->lock)
ep->busy = 1;
spin_unlock(&musb->lock);
- if (is_dma_capable() && ep->dma)
- unmap_dma_buffer(req, musb);
+ unmap_dma_buffer(req, musb);
if (request->status == 0)
DBG(5, "%s done request %p, %d/%d\n",
ep->end_point.name, request,
@@ -335,7 +358,7 @@ static void txstate(struct musb *musb, struct musb_request *req)
csr);
#ifndef CONFIG_MUSB_PIO_ONLY
- if (is_dma_capable() && musb_ep->dma) {
+ if (is_buffer_mapped(req)) {
struct dma_controller *c = musb->dma_controller;
size_t request_size;
@@ -436,8 +459,7 @@ static void txstate(struct musb *musb, struct musb_request *req)
* Unmap the dma buffer back to cpu if dma channel
* programming fails
*/
- if (is_dma_capable() && musb_ep->dma)
- unmap_dma_buffer(req, musb);
+ unmap_dma_buffer(req, musb);
musb_write_fifo(musb_ep->hw_ep, fifo_count,
(u8 *) (request->buf + request->actual));
@@ -627,7 +649,7 @@ static void rxstate(struct musb *musb, struct musb_request *req)
return;
}
- if (is_cppi_enabled() && musb_ep->dma) {
+ if (is_cppi_enabled() && is_buffer_mapped(req)) {
struct dma_controller *c = musb->dma_controller;
struct dma_channel *channel = musb_ep->dma;
@@ -658,7 +680,7 @@ static void rxstate(struct musb *musb, struct musb_request *req)
len = musb_readw(epio, MUSB_RXCOUNT);
if (request->actual < request->length) {
#ifdef CONFIG_USB_INVENTRA_DMA
- if (is_dma_capable() && musb_ep->dma) {
+ if (is_buffer_mapped(req)) {
struct dma_controller *c;
struct dma_channel *channel;
int use_dma = 0;
@@ -742,7 +764,7 @@ static void rxstate(struct musb *musb, struct musb_request *req)
fifo_count = min_t(unsigned, len, fifo_count);
#ifdef CONFIG_USB_TUSB_OMAP_DMA
- if (tusb_dma_omap() && musb_ep->dma) {
+ if (tusb_dma_omap() && is_buffer_mapped(req)) {
struct dma_controller *c = musb->dma_controller;
struct dma_channel *channel = musb_ep->dma;
u32 dma_addr = request->dma + request->actual;
@@ -762,7 +784,7 @@ static void rxstate(struct musb *musb, struct musb_request *req)
* programming fails. This buffer is mapped if the
* channel allocation is successful
*/
- if (is_dma_capable() && musb_ep->dma) {
+ if (is_buffer_mapped(req)) {
unmap_dma_buffer(req, musb);
/*
@@ -989,7 +1011,11 @@ static int musb_gadget_enable(struct usb_ep *ep,
/* Set TXMAXP with the FIFO size of the endpoint
* to disable double buffering mode.
*/
- musb_writew(regs, MUSB_TXMAXP, musb_ep->packet_sz | (musb_ep->hb_mult << 11));
+ if (musb->double_buffer_not_ok)
+ musb_writew(regs, MUSB_TXMAXP, hw_ep->max_packet_sz_tx);
+ else
+ musb_writew(regs, MUSB_TXMAXP, musb_ep->packet_sz
+ | (musb_ep->hb_mult << 11));
csr = MUSB_TXCSR_MODE | MUSB_TXCSR_CLRDATATOG;
if (musb_readw(regs, MUSB_TXCSR)
@@ -1025,7 +1051,11 @@ static int musb_gadget_enable(struct usb_ep *ep,
/* Set RXMAXP with the FIFO size of the endpoint
* to disable double buffering mode.
*/
- musb_writew(regs, MUSB_RXMAXP, musb_ep->packet_sz | (musb_ep->hb_mult << 11));
+ if (musb->double_buffer_not_ok)
+ musb_writew(regs, MUSB_RXMAXP, hw_ep->max_packet_sz_tx);
+ else
+ musb_writew(regs, MUSB_RXMAXP, musb_ep->packet_sz
+ | (musb_ep->hb_mult << 11));
/* force shared fifo to OUT-only mode */
if (hw_ep->is_shared_fifo) {
@@ -1214,10 +1244,7 @@ static int musb_gadget_queue(struct usb_ep *ep, struct usb_request *req,
request->epnum = musb_ep->current_epnum;
request->tx = musb_ep->is_in;
- if (is_dma_capable() && musb_ep->dma)
- map_dma_buffer(request, musb);
- else
- request->mapped = 0;
+ map_dma_buffer(request, musb, musb_ep);
spin_lock_irqsave(&musb->lock, lockflags);
diff --git a/drivers/usb/musb/musb_gadget.h b/drivers/usb/musb/musb_gadget.h
index dec8dc008191..a55354fbccf5 100644
--- a/drivers/usb/musb/musb_gadget.h
+++ b/drivers/usb/musb/musb_gadget.h
@@ -35,13 +35,19 @@
#ifndef __MUSB_GADGET_H
#define __MUSB_GADGET_H
+enum buffer_map_state {
+ UN_MAPPED = 0,
+ PRE_MAPPED,
+ MUSB_MAPPED
+};
+
struct musb_request {
struct usb_request request;
struct musb_ep *ep;
struct musb *musb;
u8 tx; /* endpoint direction */
u8 epnum;
- u8 mapped;
+ enum buffer_map_state map_state;
};
static inline struct musb_request *to_musb_request(struct usb_request *req)
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 4d5bcb4e14d2..0f523d7db57b 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -609,7 +609,7 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep)
/* Set RXMAXP with the FIFO size of the endpoint
* to disable double buffer mode.
*/
- if (musb->hwvers < MUSB_HWVERS_2000)
+ if (musb->double_buffer_not_ok)
musb_writew(ep->regs, MUSB_RXMAXP, ep->max_packet_sz_rx);
else
musb_writew(ep->regs, MUSB_RXMAXP,
@@ -784,14 +784,13 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
/* protocol/endpoint/interval/NAKlimit */
if (epnum) {
musb_writeb(epio, MUSB_TXTYPE, qh->type_reg);
- if (can_bulk_split(musb, qh->type))
+ if (musb->double_buffer_not_ok)
musb_writew(epio, MUSB_TXMAXP,
- packet_sz
- | ((hw_ep->max_packet_sz_tx /
- packet_sz) - 1) << 11);
+ hw_ep->max_packet_sz_tx);
else
musb_writew(epio, MUSB_TXMAXP,
- packet_sz);
+ qh->maxpacket |
+ ((qh->hb_mult - 1) << 11));
musb_writeb(epio, MUSB_TXINTERVAL, qh->intv_reg);
} else {
musb_writeb(epio, MUSB_NAKLIMIT0, qh->intv_reg);
diff --git a/drivers/usb/musb/musbhsdma.h b/drivers/usb/musb/musbhsdma.h
index f763d62f151c..21056c924c74 100644
--- a/drivers/usb/musb/musbhsdma.h
+++ b/drivers/usb/musb/musbhsdma.h
@@ -94,24 +94,33 @@ static inline void musb_write_hsdma_addr(void __iomem *mbase,
{
musb_writew(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW),
- ((u16)((u32) dma_addr & 0xFFFF)));
+ dma_addr);
musb_writew(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH),
- ((u16)(((u32) dma_addr >> 16) & 0xFFFF)));
+ (dma_addr >> 16));
}
static inline u32 musb_read_hsdma_count(void __iomem *mbase, u8 bchannel)
{
- return musb_readl(mbase,
+ u32 count = musb_readw(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH));
+
+ count = count << 16;
+
+ count |= musb_readw(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW));
+
+ return count;
}
static inline void musb_write_hsdma_count(void __iomem *mbase,
u8 bchannel, u32 len)
{
- musb_writel(mbase,
+ musb_writew(mbase,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW),len);
+ musb_writew(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH),
- len);
+ (len >> 16));
}
#endif /* CONFIG_BLACKFIN */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 07:41:53 +0100