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can: Proper ctrlmode handling for CAN devices 

This patch adds error checking of ctrlmode values for CAN devices. As
an example all availabe bits are implemented in the mcp251x driver.

Signed-off-by: Christian Pellegrin <chripell@fsfe.org>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christian Pellegrin 2010-01-14 07:08:34 +00:00 committed by David S. Miller
parent 1954dc1177
commit ad72c347e5
9 changed files with 19 additions and 1 deletions
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1
drivers/net/can/at91_can.c
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@ -1073,6 +1073,7 @@ static int __init at91_can_probe(struct platform_device *pdev)
priv->can.bittiming_const = &at91_bittiming_const;
priv->can.do_set_bittiming = at91_set_bittiming;
priv->can.do_set_mode = at91_set_mode;
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
priv->reg_base = addr;
priv->dev = dev;
priv->clk = clk;

1
drivers/net/can/bfin_can.c
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@ -603,6 +603,7 @@ struct net_device *alloc_bfin_candev(void)
priv->can.bittiming_const = &bfin_can_bittiming_const;
priv->can.do_set_bittiming = bfin_can_set_bittiming;
priv->can.do_set_mode = bfin_can_set_mode;
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
return dev;
}

2
drivers/net/can/dev.c
View File

@ -592,6 +592,8 @@ static int can_changelink(struct net_device *dev,
if (dev->flags & IFF_UP)
return -EBUSY;
cm = nla_data(data[IFLA_CAN_CTRLMODE]);
if (cm->flags & ~priv->ctrlmode_supported)
return -EOPNOTSUPP;
priv->ctrlmode &= ~cm->mask;
priv->ctrlmode |= cm->flags;
}

11
drivers/net/can/mcp251x.c
View File

@ -539,9 +539,14 @@ static void mcp251x_set_normal_mode(struct spi_device *spi)
if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) {
/* Put device into loopback mode */
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LOOPBACK);
} else if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) {
/* Put device into listen-only mode */
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LISTEN_ONLY);
} else {
/* Put device into normal mode */
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_NORMAL);
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_NORMAL |
(priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT ?
CANCTRL_OSM : 0));
/* Wait for the device to enter normal mode */
timeout = jiffies + HZ;
@ -948,6 +953,10 @@ static int __devinit mcp251x_can_probe(struct spi_device *spi)
priv->can.bittiming_const = &mcp251x_bittiming_const;
priv->can.do_set_mode = mcp251x_do_set_mode;
priv->can.clock.freq = pdata->oscillator_frequency / 2;
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
CAN_CTRLMODE_LOOPBACK | CAN_CTRLMODE_LISTENONLY;
if (pdata->model == CAN_MCP251X_MCP2515)
priv->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT;
priv->net = net;
dev_set_drvdata(&spi->dev, priv);

1
drivers/net/can/mscan/mscan.c
View File

@ -686,6 +686,7 @@ struct net_device *alloc_mscandev(void)
priv->can.bittiming_const = &mscan_bittiming_const;
priv->can.do_set_bittiming = mscan_do_set_bittiming;
priv->can.do_set_mode = mscan_do_set_mode;
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
for (i = 0; i < TX_QUEUE_SIZE; i++) {
priv->tx_queue[i].id = i;

1
drivers/net/can/sja1000/sja1000.c
View File

@ -567,6 +567,7 @@ struct net_device *alloc_sja1000dev(int sizeof_priv)
priv->can.bittiming_const = &sja1000_bittiming_const;
priv->can.do_set_bittiming = sja1000_set_bittiming;
priv->can.do_set_mode = sja1000_set_mode;
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
if (sizeof_priv)
priv->priv = (void *)priv + sizeof(struct sja1000_priv);

1
drivers/net/can/ti_hecc.c
View File

@ -909,6 +909,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
priv->can.bittiming_const = &ti_hecc_bittiming_const;
priv->can.do_set_mode = ti_hecc_do_set_mode;
priv->can.do_get_state = ti_hecc_get_state;
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
ndev->irq = irq->start;
ndev->flags |= IFF_ECHO;

1
drivers/net/can/usb/ems_usb.c
View File

@ -1022,6 +1022,7 @@ static int ems_usb_probe(struct usb_interface *intf,
dev->can.bittiming_const = &ems_usb_bittiming_const;
dev->can.do_set_bittiming = ems_usb_set_bittiming;
dev->can.do_set_mode = ems_usb_set_mode;
dev->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
netdev->flags |= IFF_ECHO; /* we support local echo */

1
include/linux/can/dev.h
View File

@ -38,6 +38,7 @@ struct can_priv {
enum can_state state;
u32 ctrlmode;
u32 ctrlmode_supported;
int restart_ms;
struct timer_list restart_timer;