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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2011-07-07 09:58:43 +0900
committerFelipe Balbi <balbi@ti.com>2011-07-09 01:08:39 +0300
commitbb59dbff4e5fb0ac14e3ee47d3f688490f128155 (patch)
tree1bf92ae02fd2e0b9a29c09a1229216285a6415b1
parent8ca137562a79f573f822f5a84a4e56a0d8cc6792 (diff)
usb: gadget: m66592-udc: add function for external controller
M66592 has the pin of WR0 and WR1. So, if one write-pin of CPU connects to the pins, we have to change the setting of FIFOSEL register in the controller. If we don't change the setting, the controller cannot send the data of odd length. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
-rw-r--r--drivers/usb/gadget/m66592-udc.c4
-rw-r--r--drivers/usb/gadget/m66592-udc.h38
-rw-r--r--include/linux/usb/m66592.h2
3 files changed, 25 insertions, 19 deletions
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 40c2f7a4f8fb..5c9c04d7aa76 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -781,7 +781,7 @@ static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
/* write fifo */
if (req->req.buf) {
if (size > 0)
- m66592_write_fifo(m66592, ep->fifoaddr, buf, size);
+ m66592_write_fifo(m66592, ep, buf, size);
if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
}
@@ -827,7 +827,7 @@ static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req)
/* write fifo */
if (req->req.buf) {
- m66592_write_fifo(m66592, ep->fifoaddr, buf, size);
+ m66592_write_fifo(m66592, ep, buf, size);
if ((size == 0)
|| ((size % ep->ep.maxpacket) != 0)
|| ((bufsize != ep->ep.maxpacket)
diff --git a/drivers/usb/gadget/m66592-udc.h b/drivers/usb/gadget/m66592-udc.h
index b85e05b2e97b..7b93d579af37 100644
--- a/drivers/usb/gadget/m66592-udc.h
+++ b/drivers/usb/gadget/m66592-udc.h
@@ -561,11 +561,26 @@ static inline void m66592_write(struct m66592 *m66592, u16 val,
iowrite16(val, m66592->reg + offset);
}
+static inline void m66592_mdfy(struct m66592 *m66592, u16 val, u16 pat,
+ unsigned long offset)
+{
+ u16 tmp;
+ tmp = m66592_read(m66592, offset);
+ tmp = tmp & (~pat);
+ tmp = tmp | val;
+ m66592_write(m66592, tmp, offset);
+}
+
+#define m66592_bclr(m66592, val, offset) \
+ m66592_mdfy(m66592, 0, val, offset)
+#define m66592_bset(m66592, val, offset) \
+ m66592_mdfy(m66592, val, 0, offset)
+
static inline void m66592_write_fifo(struct m66592 *m66592,
- unsigned long offset,
+ struct m66592_ep *ep,
void *buf, unsigned long len)
{
- void __iomem *fifoaddr = m66592->reg + offset;
+ void __iomem *fifoaddr = m66592->reg + ep->fifoaddr;
if (m66592->pdata->on_chip) {
unsigned long count;
@@ -591,26 +606,15 @@ static inline void m66592_write_fifo(struct m66592 *m66592,
iowrite16_rep(fifoaddr, buf, len);
if (odd) {
unsigned char *p = buf + len*2;
+ if (m66592->pdata->wr0_shorted_to_wr1)
+ m66592_bclr(m66592, M66592_MBW_16, ep->fifosel);
iowrite8(*p, fifoaddr);
+ if (m66592->pdata->wr0_shorted_to_wr1)
+ m66592_bset(m66592, M66592_MBW_16, ep->fifosel);
}
}
}
-static inline void m66592_mdfy(struct m66592 *m66592, u16 val, u16 pat,
- unsigned long offset)
-{
- u16 tmp;
- tmp = m66592_read(m66592, offset);
- tmp = tmp & (~pat);
- tmp = tmp | val;
- m66592_write(m66592, tmp, offset);
-}
-
-#define m66592_bclr(m66592, val, offset) \
- m66592_mdfy(m66592, 0, val, offset)
-#define m66592_bset(m66592, val, offset) \
- m66592_mdfy(m66592, val, 0, offset)
-
#endif /* ifndef __M66592_UDC_H__ */
diff --git a/include/linux/usb/m66592.h b/include/linux/usb/m66592.h
index cda9625e7df0..a4ba31ab2fed 100644
--- a/include/linux/usb/m66592.h
+++ b/include/linux/usb/m66592.h
@@ -38,6 +38,8 @@ struct m66592_platdata {
/* (external controller only) one = 3.3V, zero = 1.5V */
unsigned vif:1;
+ /* (external controller only) set one = WR0_N shorted to WR1_N */
+ unsigned wr0_shorted_to_wr1:1;
};
#endif /* __LINUX_USB_M66592_H */

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