diff options
| author | David Fries <David@Fries.net> | 2014-01-16 08:29:21 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-08 03:40:18 +0400 |
| commit | f28c4e1f31802ec746a1b1dc0d7ec97f8de47024 (patch) | |
| tree | bba1e0419cbed441ea09be8c9d55f99f93d930f3 /drivers | |
| parent | 5dbf5671c73f23c2dd7082c0a14da4e7e902983a (diff) | |
| download | linux-f28c4e1f31802ec746a1b1dc0d7ec97f8de47024.tar.xz | |
w1: ds2490 reduce magic numbers
Use a #define for the usb vendor request type, clear the status
byte and use that instead of a magic offset in checking if idle.
Signed-off-by: David Fries <David@Fries.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/w1/masters/ds2490.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c index 4f7e1d770f81..6a3d0a1e02b8 100644 --- a/drivers/w1/masters/ds2490.c +++ b/drivers/w1/masters/ds2490.c @@ -1,5 +1,5 @@ /* - * dscore.c + * ds2490.c USB to one wire bridge * * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net> * @@ -28,6 +28,10 @@ #include "../w1_int.h" #include "../w1.h" +/* USB Standard */ +/* USB Control request vendor type */ +#define VENDOR 0x40 + /* COMMAND TYPE CODES */ #define CONTROL_CMD 0x00 #define COMM_CMD 0x01 @@ -107,6 +111,8 @@ #define ST_HALT 0x10 /* DS2490 is currently halted */ #define ST_IDLE 0x20 /* DS2490 is currently idle */ #define ST_EPOF 0x80 +/* Status transfer size, 16 bytes status, 16 byte result flags */ +#define ST_SIZE 0x20 /* Result Register flags */ #define RR_DETECT 0xA5 /* New device detected */ @@ -198,7 +204,7 @@ static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index) int err; err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), - CONTROL_CMD, 0x40, value, index, NULL, 0, 1000); + CONTROL_CMD, VENDOR, value, index, NULL, 0, 1000); if (err < 0) { printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n", value, index, err); @@ -213,7 +219,7 @@ static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index) int err; err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), - MODE_CMD, 0x40, value, index, NULL, 0, 1000); + MODE_CMD, VENDOR, value, index, NULL, 0, 1000); if (err < 0) { printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n", value, index, err); @@ -228,7 +234,7 @@ static int ds_send_control(struct ds_device *dev, u16 value, u16 index) int err; err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), - COMM_CMD, 0x40, value, index, NULL, 0, 1000); + COMM_CMD, VENDOR, value, index, NULL, 0, 1000); if (err < 0) { printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n", value, index, err); @@ -353,7 +359,7 @@ static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size) err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]), buf, size, &count, 1000); if (err < 0) { - u8 buf[0x20]; + u8 buf[ST_SIZE]; int count; printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]); @@ -398,7 +404,7 @@ int ds_stop_pulse(struct ds_device *dev, int limit) { struct ds_status st; int count = 0, err = 0; - u8 buf[0x20]; + u8 buf[ST_SIZE]; do { err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0); @@ -450,10 +456,11 @@ int ds_detect(struct ds_device *dev, struct ds_status *st) static int ds_wait_status(struct ds_device *dev, struct ds_status *st) { - u8 buf[0x20]; + u8 buf[ST_SIZE]; int err, count = 0; do { + st->status = 0; err = ds_recv_status_nodump(dev, st, buf, sizeof(buf)); #if 0 if (err >= 0) { @@ -464,7 +471,7 @@ static int ds_wait_status(struct ds_device *dev, struct ds_status *st) printk("\n"); } #endif - } while (!(buf[0x08] & ST_IDLE) && !(err < 0) && ++count < 100); + } while (!(st->status & ST_IDLE) && !(err < 0) && ++count < 100); if (err >= 16 && st->status & ST_EPOF) { printk(KERN_INFO "Resetting device after ST_EPOF.\n"); |