lkml.org 
[lkml]   [2012]   [Sep]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 01/24] Staging: ipack/bridges/tpci200: add helpers for writing control regs.
Date
From: Jens Taprogge <jens.taprogge@taprogge.org>

Convert tpci200_set_clockrate and tpci200_interrupt.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
---
drivers/staging/ipack/bridges/tpci200.c | 49 ++++++++++++++++++++-----------
1 file changed, 32 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/ipack/bridges/tpci200.c b/drivers/staging/ipack/bridges/tpci200.c
index 9d886b7..2560519 100644
--- a/drivers/staging/ipack/bridges/tpci200.c
+++ b/drivers/staging/ipack/bridges/tpci200.c
@@ -53,6 +53,32 @@ static struct tpci200_board *check_slot(struct ipack_device *dev)
return tpci200;
}

+static void __tpci200_clear_mask(__le16 __iomem *addr, u16 mask)
+{
+ iowrite16(ioread16(addr) & (~mask), addr);
+}
+
+static void tpci200_clear_mask(struct tpci200_board *tpci200,
+ __le16 __iomem *addr, u16 mask)
+{
+ mutex_lock(&tpci200->mutex);
+ __tpci200_clear_mask(addr, mask);
+ mutex_unlock(&tpci200->mutex);
+}
+
+static void __tpci200_set_mask(__le16 __iomem *addr, u16 mask)
+{
+ iowrite16(ioread16(addr) | mask, addr);
+}
+
+static void tpci200_set_mask(struct tpci200_board *tpci200,
+ __le16 __iomem *addr, u16 mask)
+{
+ mutex_lock(&tpci200->mutex);
+ __tpci200_set_mask(addr, mask);
+ mutex_unlock(&tpci200->mutex);
+}
+
static void tpci200_unregister(struct tpci200_board *tpci200)
{
int i;
@@ -86,7 +112,7 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
{
struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id;
int i;
- unsigned short status_reg, reg_value;
+ unsigned short status_reg;
unsigned short unhandled_ints = 0;
irqreturn_t ret = IRQ_NONE;
struct slot_irq *slot_irq;
@@ -124,12 +150,9 @@ static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
dev_info(&slot_irq->holder->dev,
"No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
tpci200->number, i);
- reg_value = readw(
- &tpci200->info->interface_regs->control[i]);
- reg_value &=
- ~(TPCI200_INT0_EN | TPCI200_INT1_EN);
- writew(reg_value,
- &tpci200->info->interface_regs->control[i]);
+ __tpci200_clear_mask(
+ &tpci200->info->interface_regs->control[i],
+ TPCI200_INT0_EN | TPCI200_INT1_EN);
}
}
}
@@ -518,30 +541,22 @@ static int tpci200_set_clockrate(struct ipack_device *dev, int mherz)
{
struct tpci200_board *tpci200 = check_slot(dev);
u16 __iomem *addr;
- u16 reg;

if (!tpci200)
return -ENODEV;

addr = &tpci200->info->interface_regs->control[dev->slot];

- /* Ensure the control register is not changed by another task after we
- * have read it. */
- mutex_lock(&tpci200->mutex);
- reg = ioread16(addr);
switch (mherz) {
case 8:
- reg &= ~(TPCI200_CLK32);
+ tpci200_clear_mask(tpci200, addr, TPCI200_CLK32);
break;
case 32:
- reg |= TPCI200_CLK32;
+ tpci200_set_mask(tpci200, addr, TPCI200_CLK32);
break;
default:
- mutex_unlock(&tpci200->mutex);
return -EINVAL;
}
- iowrite16(reg, addr);
- mutex_unlock(&tpci200->mutex);
return 0;
}

--
1.7.10.4


\
 
 \ /
  Last update: 2012-09-12 16:01    [W:0.141 / U:0.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site