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can: c_can: Cleanup irq enable/disable 

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Thomas Gleixner 2014-04-11 08:13:17 +00:00 committed by Marc Kleine-Budde
parent d61d09de02
commit 2d5f4f8569
1 changed files with 12 additions and 25 deletions
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37
drivers/net/can/c_can/c_can.c
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@ -60,6 +60,8 @@
#define CONTROL_IE BIT(1)
#define CONTROL_INIT BIT(0)
#define CONTROL_IRQMSK (CONTROL_EIE | CONTROL_IE | CONTROL_SIE)
/* test register */
#define TEST_RX BIT(7)
#define TEST_TX1 BIT(6)
@ -146,13 +148,6 @@
#define IF_RX 0
#define IF_TX 1
/* status interrupt */
#define STATUS_INTERRUPT 0x8000
/* global interrupt masks */
#define ENABLE_ALL_INTERRUPTS 1
#define DISABLE_ALL_INTERRUPTS 0
/* minimum timeout for checking BUSY status */
#define MIN_TIMEOUT_VALUE 6
@ -246,18 +241,14 @@ static u32 c_can_read_reg32(struct c_can_priv *priv, enum reg index)
return val;
}
static void c_can_enable_all_interrupts(struct c_can_priv *priv,
int enable)
static void c_can_irq_control(struct c_can_priv *priv, bool enable)
{
unsigned int cntrl_save = priv->read_reg(priv,
C_CAN_CTRL_REG);
u32 ctrl = priv->read_reg(priv, C_CAN_CTRL_REG) & ~CONTROL_IRQMSK;
if (enable)
cntrl_save |= (CONTROL_SIE | CONTROL_EIE | CONTROL_IE);
else
cntrl_save &= ~(CONTROL_EIE | CONTROL_IE | CONTROL_SIE);
ctrl |= CONTROL_IRQMSK;
priv->write_reg(priv, C_CAN_CTRL_REG, cntrl_save);
priv->write_reg(priv, C_CAN_CTRL_REG, ctrl);
}
static inline int c_can_msg_obj_is_busy(struct c_can_priv *priv, int iface)
@ -664,10 +655,7 @@ static void c_can_stop(struct net_device *dev)
{
struct c_can_priv *priv = netdev_priv(dev);
/* disable all interrupts */
c_can_enable_all_interrupts(priv, DISABLE_ALL_INTERRUPTS);
/* set the state as STOPPED */
c_can_irq_control(priv, false);
priv->can.state = CAN_STATE_STOPPED;
}
@ -682,8 +670,7 @@ static int c_can_set_mode(struct net_device *dev, enum can_mode mode)
if (err)
return err;
netif_wake_queue(dev);
/* enable status change, error and module interrupts */
c_can_enable_all_interrupts(priv, ENABLE_ALL_INTERRUPTS);
c_can_irq_control(priv, true);
break;
default:
return -EOPNOTSUPP;
@ -1144,7 +1131,7 @@ end:
napi_complete(napi);
/* enable all IRQs if we are not in bus off state */
if (priv->can.state != CAN_STATE_BUS_OFF)
c_can_enable_all_interrupts(priv, ENABLE_ALL_INTERRUPTS);
c_can_irq_control(priv, true);
}
return work_done;
@ -1159,7 +1146,7 @@ static irqreturn_t c_can_isr(int irq, void *dev_id)
return IRQ_NONE;
/* disable all interrupts and schedule the NAPI */
c_can_enable_all_interrupts(priv, DISABLE_ALL_INTERRUPTS);
c_can_irq_control(priv, false);
napi_schedule(&priv->napi);
return IRQ_HANDLED;
@ -1197,7 +1184,7 @@ static int c_can_open(struct net_device *dev)
napi_enable(&priv->napi);
/* enable status change, error and module interrupts */
c_can_enable_all_interrupts(priv, ENABLE_ALL_INTERRUPTS);
c_can_irq_control(priv, true);
netif_start_queue(dev);
return 0;
@ -1324,7 +1311,7 @@ int c_can_power_up(struct net_device *dev)
ret = c_can_start(dev);
if (!ret)
c_can_enable_all_interrupts(priv, ENABLE_ALL_INTERRUPTS);
c_can_irq_control(priv, true);
return ret;
}