From bcb2f99c6c43a8da6cb4002e8b0acf6f1275f3a8 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Mon, 22 Oct 2012 22:14:57 +0200 Subject: [PATCH] usb: gadget: use a computation macro for INT endpoint interval The 5+4 magic for HS tries to aim 32ms which is also what is intended with 1 << 5 for FS. This little macro should make this easier to understand. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi --- drivers/usb/gadget/f_acm.c | 7 +++---- drivers/usb/gadget/f_ecm.c | 8 ++++---- drivers/usb/gadget/f_ncm.c | 6 +++--- drivers/usb/gadget/f_rndis.c | 8 ++++---- include/linux/usb/composite.h | 2 ++ 5 files changed, 16 insertions(+), 15 deletions(-) diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c index d672250a61fa..7c30bb49850b 100644 --- a/drivers/usb/gadget/f_acm.c +++ b/drivers/usb/gadget/f_acm.c @@ -87,7 +87,7 @@ static inline struct f_acm *port_to_acm(struct gserial *p) /* notification endpoint uses smallish and infrequent fixed-size messages */ -#define GS_LOG2_NOTIFY_INTERVAL 5 /* 1 << 5 == 32 msec */ +#define GS_NOTIFY_INTERVAL_MS 32 #define GS_NOTIFY_MAXPACKET 10 /* notification + 2 bytes */ /* interface and class descriptors: */ @@ -167,7 +167,7 @@ static struct usb_endpoint_descriptor acm_fs_notify_desc = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET), - .bInterval = 1 << GS_LOG2_NOTIFY_INTERVAL, + .bInterval = GS_NOTIFY_INTERVAL_MS, }; static struct usb_endpoint_descriptor acm_fs_in_desc = { @@ -199,14 +199,13 @@ static struct usb_descriptor_header *acm_fs_function[] = { }; /* high speed support: */ - static struct usb_endpoint_descriptor acm_hs_notify_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET), - .bInterval = GS_LOG2_NOTIFY_INTERVAL+4, + .bInterval = USB_MS_TO_HS_INTERVAL(GS_NOTIFY_INTERVAL_MS), }; static struct usb_endpoint_descriptor acm_hs_in_desc = { diff --git a/drivers/usb/gadget/f_ecm.c b/drivers/usb/gadget/f_ecm.c index 8ab9e9638f91..789242749df5 100644 --- a/drivers/usb/gadget/f_ecm.c +++ b/drivers/usb/gadget/f_ecm.c @@ -91,7 +91,7 @@ static inline unsigned ecm_bitrate(struct usb_gadget *g) * encapsulated commands (vendor-specific, using control-OUT). */ -#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */ +#define ECM_STATUS_INTERVAL_MS 32 #define ECM_STATUS_BYTECOUNT 16 /* 8 byte header + data */ @@ -192,7 +192,7 @@ static struct usb_endpoint_descriptor fs_ecm_notify_desc = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT), - .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, + .bInterval = ECM_STATUS_INTERVAL_MS, }; static struct usb_endpoint_descriptor fs_ecm_in_desc = { @@ -239,7 +239,7 @@ static struct usb_endpoint_descriptor hs_ecm_notify_desc = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT), - .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, + .bInterval = USB_MS_TO_HS_INTERVAL(ECM_STATUS_INTERVAL_MS), }; static struct usb_endpoint_descriptor hs_ecm_in_desc = { @@ -288,7 +288,7 @@ static struct usb_endpoint_descriptor ss_ecm_notify_desc = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(ECM_STATUS_BYTECOUNT), - .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, + .bInterval = USB_MS_TO_HS_INTERVAL(ECM_STATUS_INTERVAL_MS), }; static struct usb_ss_ep_comp_descriptor ss_ecm_intr_comp_desc = { diff --git a/drivers/usb/gadget/f_ncm.c b/drivers/usb/gadget/f_ncm.c index b651b529c67f..4f0950069a43 100644 --- a/drivers/usb/gadget/f_ncm.c +++ b/drivers/usb/gadget/f_ncm.c @@ -121,7 +121,7 @@ static struct usb_cdc_ncm_ntb_parameters ntb_parameters = { * waste less bandwidth. */ -#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */ +#define NCM_STATUS_INTERVAL_MS 32 #define NCM_STATUS_BYTECOUNT 16 /* 8 byte header + data */ static struct usb_interface_assoc_descriptor ncm_iad_desc __initdata = { @@ -230,7 +230,7 @@ static struct usb_endpoint_descriptor fs_ncm_notify_desc __initdata = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT), - .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, + .bInterval = NCM_STATUS_INTERVAL_MS, }; static struct usb_endpoint_descriptor fs_ncm_in_desc __initdata = { @@ -275,7 +275,7 @@ static struct usb_endpoint_descriptor hs_ncm_notify_desc __initdata = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT), - .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, + .bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS), }; static struct usb_endpoint_descriptor hs_ncm_in_desc __initdata = { .bLength = USB_DT_ENDPOINT_SIZE, diff --git a/drivers/usb/gadget/f_rndis.c b/drivers/usb/gadget/f_rndis.c index b1681e45aca7..61f4b13c6cf5 100644 --- a/drivers/usb/gadget/f_rndis.c +++ b/drivers/usb/gadget/f_rndis.c @@ -101,7 +101,7 @@ static unsigned int bitrate(struct usb_gadget *g) /* */ -#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */ +#define RNDIS_STATUS_INTERVAL_MS 32 #define STATUS_BYTECOUNT 8 /* 8 bytes data */ @@ -190,7 +190,7 @@ static struct usb_endpoint_descriptor fs_notify_desc = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), - .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, + .bInterval = RNDIS_STATUS_INTERVAL_MS, }; static struct usb_endpoint_descriptor fs_in_desc = { @@ -236,7 +236,7 @@ static struct usb_endpoint_descriptor hs_notify_desc = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), - .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, + .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS) }; static struct usb_endpoint_descriptor hs_in_desc = { @@ -284,7 +284,7 @@ static struct usb_endpoint_descriptor ss_notify_desc = { .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), - .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, + .bInterval = USB_MS_TO_HS_INTERVAL(RNDIS_STATUS_INTERVAL_MS) }; static struct usb_ss_ep_comp_descriptor ss_intr_comp_desc = { diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index f8dda0621800..8634a127bdd3 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -38,6 +38,7 @@ #include #include #include +#include /* * USB function drivers should return USB_GADGET_DELAYED_STATUS if they @@ -51,6 +52,7 @@ /* big enough to hold our biggest descriptor */ #define USB_COMP_EP0_BUFSIZ 1024 +#define USB_MS_TO_HS_INTERVAL(x) (ilog2((x * 1000 / 125)) + 1) struct usb_configuration; /** -- 2.34.1