diff options
Diffstat (limited to 'drivers/w1/masters/ds2490.c')
| -rw-r--r-- | drivers/w1/masters/ds2490.c | 76 |
1 files changed, 38 insertions, 38 deletions
diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c index c8365fb20b4..6b188e8008e 100644 --- a/drivers/w1/masters/ds2490.c +++ b/drivers/w1/masters/ds2490.c @@ -98,11 +98,6 @@ #define BRANCH_MAIN 0xCC #define BRANCH_AUX 0x33 -/* - * Duration of the strong pull-up pulse in milliseconds. - */ -#define PULLUP_PULSE_DURATION 750 - /* Status flags */ #define ST_SPUA 0x01 /* Strong Pull-up is active */ #define ST_PRGA 0x02 /* 12V programming pulse is being generated */ @@ -131,6 +126,11 @@ struct ds_device int ep[NUM_EP]; + /* Strong PullUp + * 0: pullup not active, else duration in milliseconds + */ + int spu_sleep; + struct w1_bus_master master; }; @@ -192,7 +192,7 @@ static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index) return err; } -#if 0 + static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index) { int err; @@ -207,7 +207,7 @@ static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index) return err; } -#endif + static int ds_send_control(struct ds_device *dev, u16 value, u16 index) { int err; @@ -294,14 +294,6 @@ static int ds_recv_status(struct ds_device *dev, struct ds_status *st) if (count < 0) return err; } -#if 0 - if (st->status & ST_IDLE) { - printk(KERN_INFO "Resetting pulse after ST_IDLE.\n"); - err = ds_start_pulse(dev, PULLUP_PULSE_DURATION); - if (err) - return err; - } -#endif return err; } @@ -472,32 +464,26 @@ static int ds_set_speed(struct ds_device *dev, int speed) } #endif /* 0 */ -static int ds_start_pulse(struct ds_device *dev, int delay) +static int ds_set_pullup(struct ds_device *dev, int delay) { int err; u8 del = 1 + (u8)(delay >> 4); - struct ds_status st; - -#if 0 - err = ds_stop_pulse(dev, 10); - if (err) - return err; - - err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE); - if (err) - return err; -#endif - err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del); - if (err) - return err; - err = ds_send_control(dev, COMM_PULSE | COMM_IM | COMM_F, 0); + dev->spu_sleep = 0; + err = ds_send_control_mode(dev, MOD_PULSE_EN, delay ? PULSE_SPUE : 0); if (err) return err; - mdelay(delay); + if (delay) { + err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del); + if (err) + return err; - ds_wait_status(dev, &st); + /* Just storing delay would not get the trunication and + * roundup. + */ + dev->spu_sleep = del<<4; + } return err; } @@ -558,6 +544,9 @@ static int ds_write_byte(struct ds_device *dev, u8 byte) if (err) return err; + if (dev->spu_sleep) + msleep(dev->spu_sleep); + err = ds_wait_status(dev, &st); if (err) return err; @@ -566,8 +555,6 @@ static int ds_write_byte(struct ds_device *dev, u8 byte) if (err < 0) return err; - ds_start_pulse(dev, PULLUP_PULSE_DURATION); - return !(byte == rbyte); } @@ -603,7 +590,7 @@ static int ds_read_block(struct ds_device *dev, u8 *buf, int len) if (err < 0) return err; - err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len); + err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM, len); if (err) return err; @@ -630,14 +617,15 @@ static int ds_write_block(struct ds_device *dev, u8 *buf, int len) if (err) return err; + if (dev->spu_sleep) + msleep(dev->spu_sleep); + ds_wait_status(dev, &st); err = ds_recv_data(dev, buf, len); if (err < 0) return err; - ds_start_pulse(dev, PULLUP_PULSE_DURATION); - return !(err == len); } @@ -803,6 +791,16 @@ static u8 ds9490r_reset(void *data) return 0; } +static u8 ds9490r_set_pullup(void *data, int delay) +{ + struct ds_device *dev = data; + + if (ds_set_pullup(dev, delay)) + return 1; + + return 0; +} + static int ds_w1_init(struct ds_device *dev) { memset(&dev->master, 0, sizeof(struct w1_bus_master)); @@ -816,6 +814,7 @@ static int ds_w1_init(struct ds_device *dev) dev->master.read_block = &ds9490r_read_block; dev->master.write_block = &ds9490r_write_block; dev->master.reset_bus = &ds9490r_reset; + dev->master.set_pullup = &ds9490r_set_pullup; return w1_add_master_device(&dev->master); } @@ -839,6 +838,7 @@ static int ds_probe(struct usb_interface *intf, printk(KERN_INFO "Failed to allocate new DS9490R structure.\n"); return -ENOMEM; } + dev->spu_sleep = 0; dev->udev = usb_get_dev(udev); if (!dev->udev) { err = -ENOMEM; |