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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>
This commit is contained in:
David Fries 2014-01-15 22:29:21 -06:00 committed by Greg Kroah-Hartman
parent 5dbf5671c7
commit f28c4e1f31
1 changed files with 15 additions and 8 deletions
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23
drivers/w1/masters/ds2490.c
View File

@ -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");