From 5154e9f126c1d2ee8f5f93d9954f83d82b2d5e64 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Fri, 8 Jul 2011 14:51:27 +0900 Subject: usb: gadget: r8a66597-udc: Make BUSWAIT configurable through platform data BUSWAIT is a 4-bit-wide value that controls the number of access waits from the CPU to on-chip USB module. b'0000 inserts 0 wait (2 access cycles) and b'1111 inserts 15 waits (17 access cycles, hardware initial value), respectively. BUSWAIT value depends on peripheral clock frequency supplied to on-chip of each CPU, hence should be configurable through platform data. Note that this patch assumes that b'0000 (0 wait, 2 access cycles) is rerely used and considered as invalid. If valid 'buswait' data is not provided by platform, initial b'1111 (15 waits, 17 access cycles) will be applied as a safe default. Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi --- include/linux/usb/r8a66597.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/r8a66597.h b/include/linux/usb/r8a66597.h index 26d216734057..6e1bfaedb6ca 100644 --- a/include/linux/usb/r8a66597.h +++ b/include/linux/usb/r8a66597.h @@ -31,6 +31,9 @@ struct r8a66597_platdata { /* This callback can control port power instead of DVSTCTR register. */ void (*port_power)(int port, int power); + /* This parameter is for BUSWAIT */ + u16 buswait; + /* set one = on chip controller, set zero = external controller */ unsigned on_chip:1; -- cgit v1.2.2 From bb59dbff4e5fb0ac14e3ee47d3f688490f128155 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Thu, 7 Jul 2011 09:58:43 +0900 Subject: 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 Signed-off-by: Felipe Balbi --- include/linux/usb/m66592.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux') 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 */ -- cgit v1.2.2