jz4760: Heavily rework USB driver to add working DMA support

 * DMA Bulk IN (ie our TX) results in sequential transfers 33-68% faster.
 * DMA Bulk OUT (ie RX) is mostly stripped out due to complete brokenness.
 * Interrupt and control endpoints remain PIO-driven.

Other improvements:

1) Use consistent endpoint references (no magic numbers)
2) Greatly enhanced logging
3) DMA support can be compiled out completely
4) Setting lockswitch will disable all DMA operations at runtime
5) Much more robust error checking and recovery

Change-Id: I57b82e655e55ced0dfe289e379b0b61d8fe443b4

1 files changed, 12 insertions, 0 deletions

diff --git a/firmware/export/jz4760b.h b/firmware/export/jz4760b.h
index e61689105c..589f67800a 100644
--- a/firmware/export/jz4760b.h
+++ b/firmware/export/jz4760b.h
@@ -6992,8 +6992,12 @@ do {								\
 #define USB_OUTCSRH             (USB_BASE + 0x17) /* EP1-15 OUT CSR MSB 8-bit */
 #define USB_OUTCOUNT            (USB_BASE + 0x18) /* EP1-15 OUT FIFO count 16-bit */
 
+#define USB_CONFIGDATA          (USB_BASE + 0x1f) /* Fixed config */
+
 #define USB_FIFO_EP(n)          (USB_BASE + (n)*4 + 0x20)
 
+#define USB_HWVERS              (USB_BASE + 0x6c)
+
 #define USB_EPINFO              (USB_BASE + 0x78) /* Endpoint information */
 #define USB_RAMINFO             (USB_BASE + 0x79) /* RAM information */
 
@@ -7034,6 +7038,7 @@ do {								\
 #define USB_INCSRH_DMAREQENAB   0x10
 #define USB_INCSRH_FRCDATATOG   0x08
 #define USB_INCSRH_DMAREQMODE   0x04
+#define USB_INCSR_INCOMPTX      0x80
 #define USB_INCSR_CDT           0x40
 #define USB_INCSR_SENTSTALL     0x20
 #define USB_INCSR_SENDSTALL     0x10
@@ -7077,6 +7082,10 @@ do {								\
 #define USB_CNTL_BURST_8        (2 << 9)
 #define USB_CNTL_BURST_16       (3 << 9)
 
+/* USB HW revision */
+#define USB_HWVERS_MAJOR(x)    ((x >> 10) & 0x1f)
+#define USB_HWVERS_MINOR(x)    (x & 0x3ff)
+
 /* DMA interrupt bits */
 #define USB_INTR_DMA_BULKIN     1
 #define USB_INTR_DMA_BULKOUT    2
@@ -7104,6 +7113,7 @@ do {								\
 #define REG_USB_OUTCSRH         REG8(USB_OUTCSRH)
 #define REG_USB_OUTCOUNT        REG16(USB_OUTCOUNT)
 
+#define REG_USB_CONFIGDATA      REG8(USB_CONFIGDATA)
 #define REG_USB_FIFO_EP(n)      REG32(USB_FIFO_EP(n))
 
 #define REG_USB_INTR            REG8(USB_INTR)
@@ -7111,6 +7121,8 @@ do {								\
 #define REG_USB_ADDR(n)         REG32(USB_ADDR(n))
 #define REG_USB_COUNT(n)        REG32(USB_COUNT(n))
 
+#define REG_USB_HWVERS          REG16(USB_HWVERS)
+
 #define REG_USB_EPINFO          REG8(USB_EPINFO)
 #define REG_USB_RAMINFO         REG8(USB_RAMINFO)