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authorBen Dooks <ben-linux@fluff.org>2008-02-05 00:02:08 +0000
committerJeff Garzik <jeff@garzik.org>2008-02-11 11:06:27 -0500
commit321f69a4c3bb807abdf1fd6329403ec0449a3d78 (patch)
tree618d05ce1be64489a787200f93cd73fa65138d0e /drivers/net/dm9000.c
parent89c8b0e6cd3859a6445398c5aa94ebd21d0e64ce (diff)
DM9000: Use msleep() instead of udelay()
We can use sleeping functions when reading and writing the PHY registers, so let us sleep instead of busy waiting for the PHY. Note, this also fixes a bug reading the PHY where only 100uS was being used instead of 150uS Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/dm9000.c')
-rw-r--r--drivers/net/dm9000.c23
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
index 071aad1af577..2e0add074889 100644
--- a/drivers/net/dm9000.c
+++ b/drivers/net/dm9000.c
@@ -116,6 +116,7 @@ typedef struct board_info {
u8 io_mode; /* 0:word, 2:byte */
u8 phy_addr;
unsigned int flags;
+ unsigned int in_suspend :1;
int debug_level;
@@ -1108,6 +1109,18 @@ dm9000_hash_table(struct net_device *dev)
/*
+ * Sleep, either by using msleep() or if we are suspending, then
+ * use mdelay() to sleep.
+ */
+static void dm9000_msleep(board_info_t *db, unsigned int ms)
+{
+ if (db->in_suspend)
+ mdelay(ms);
+ else
+ msleep(ms);
+}
+
+/*
* Read a word from phyxcer
*/
static int
@@ -1131,7 +1144,7 @@ dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
writeb(reg_save, db->io_addr);
spin_unlock_irqrestore(&db->lock,flags);
- udelay(100); /* Wait read complete */
+ dm9000_msleep(db, 1); /* Wait read complete */
spin_lock_irqsave(&db->lock,flags);
reg_save = readb(db->io_addr);
@@ -1175,7 +1188,7 @@ dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
writeb(reg_save, db->io_addr);
spin_unlock_irqrestore(&db->lock,flags);
- udelay(500); /* Wait write complete */
+ dm9000_msleep(db, 1); /* Wait write complete */
spin_lock_irqsave(&db->lock,flags);
reg_save = readb(db->io_addr);
@@ -1192,8 +1205,12 @@ static int
dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
{
struct net_device *ndev = platform_get_drvdata(dev);
+ board_info_t *db;
if (ndev) {
+ db = (board_info_t *) ndev->priv;
+ db->in_suspend = 1;
+
if (netif_running(ndev)) {
netif_device_detach(ndev);
dm9000_shutdown(ndev);
@@ -1216,6 +1233,8 @@ dm9000_drv_resume(struct platform_device *dev)
netif_device_attach(ndev);
}
+
+ db->in_suspend = 0;
}
return 0;
}