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path: root/drivers/net/ethernet/micrel/ks8851.c
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-rw-r--r--drivers/net/ethernet/micrel/ks8851.c97
1 files changed, 68 insertions, 29 deletions
diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c
index e2e75041e931..053d6d085539 100644
--- a/drivers/net/ethernet/micrel/ks8851.c
+++ b/drivers/net/ethernet/micrel/ks8851.c
@@ -151,6 +151,30 @@ static int msg_enable;
/* turn register number and byte-enable mask into data for start of packet */
#define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6)
+/**
+ * ks8851_lock - register access lock
+ * @ks: The chip state
+ * @flags: Spinlock flags
+ *
+ * Claim chip register access lock
+ */
+static void ks8851_lock(struct ks8851_net *ks, unsigned long *flags)
+{
+ mutex_lock(&ks->lock);
+}
+
+/**
+ * ks8851_unlock - register access unlock
+ * @ks: The chip state
+ * @flags: Spinlock flags
+ *
+ * Release chip register access lock
+ */
+static void ks8851_unlock(struct ks8851_net *ks, unsigned long *flags)
+{
+ mutex_unlock(&ks->lock);
+}
+
/* SPI register read/write calls.
*
* All these calls issue SPI transactions to access the chip's registers. They
@@ -304,10 +328,11 @@ static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode)
static int ks8851_write_mac_addr(struct net_device *dev)
{
struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
u16 val;
int i;
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
/*
* Wake up chip in case it was powered off when stopped; otherwise,
@@ -323,7 +348,7 @@ static int ks8851_write_mac_addr(struct net_device *dev)
if (!netif_running(dev))
ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
return 0;
}
@@ -337,10 +362,11 @@ static int ks8851_write_mac_addr(struct net_device *dev)
static void ks8851_read_mac_addr(struct net_device *dev)
{
struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
u16 reg;
int i;
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
for (i = 0; i < ETH_ALEN; i += 2) {
reg = ks8851_rdreg16(ks, KS_MAR(i));
@@ -348,7 +374,7 @@ static void ks8851_read_mac_addr(struct net_device *dev)
dev->dev_addr[i + 1] = reg & 0xff;
}
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
}
/**
@@ -534,10 +560,11 @@ static void ks8851_rx_pkts(struct ks8851_net *ks)
static irqreturn_t ks8851_irq(int irq, void *_ks)
{
struct ks8851_net *ks = _ks;
- unsigned status;
unsigned handled = 0;
+ unsigned long flags;
+ unsigned int status;
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
status = ks8851_rdreg16(ks, KS_ISR);
@@ -606,7 +633,7 @@ static irqreturn_t ks8851_irq(int irq, void *_ks)
ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1);
}
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
if (status & IRQ_LCI)
mii_check_link(&ks->mii);
@@ -700,10 +727,11 @@ static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb)
static void ks8851_tx_work(struct work_struct *work)
{
struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work);
+ unsigned long flags;
struct sk_buff *txb;
bool last = skb_queue_empty(&ks->txq);
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
while (!last) {
txb = skb_dequeue(&ks->txq);
@@ -719,7 +747,7 @@ static void ks8851_tx_work(struct work_struct *work)
}
}
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
}
/**
@@ -732,6 +760,7 @@ static void ks8851_tx_work(struct work_struct *work)
static int ks8851_net_open(struct net_device *dev)
{
struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
int ret;
ret = request_threaded_irq(dev->irq, NULL, ks8851_irq,
@@ -744,7 +773,7 @@ static int ks8851_net_open(struct net_device *dev)
/* lock the card, even if we may not actually be doing anything
* else at the moment */
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
netif_dbg(ks, ifup, ks->netdev, "opening\n");
@@ -804,7 +833,7 @@ static int ks8851_net_open(struct net_device *dev)
netif_dbg(ks, ifup, ks->netdev, "network device up\n");
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
mii_check_link(&ks->mii);
return 0;
}
@@ -820,22 +849,23 @@ static int ks8851_net_open(struct net_device *dev)
static int ks8851_net_stop(struct net_device *dev)
{
struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
netif_info(ks, ifdown, dev, "shutting down\n");
netif_stop_queue(dev);
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
/* turn off the IRQs and ack any outstanding */
ks8851_wrreg16(ks, KS_IER, 0x0000);
ks8851_wrreg16(ks, KS_ISR, 0xffff);
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
/* stop any outstanding work */
flush_work(&ks->tx_work);
flush_work(&ks->rxctrl_work);
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
/* shutdown RX process */
ks8851_wrreg16(ks, KS_RXCR1, 0x0000);
@@ -844,7 +874,7 @@ static int ks8851_net_stop(struct net_device *dev)
/* set powermode to soft power down to save power */
ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
/* ensure any queued tx buffers are dumped */
while (!skb_queue_empty(&ks->txq)) {
@@ -916,13 +946,14 @@ static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb,
static void ks8851_rxctrl_work(struct work_struct *work)
{
struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work);
+ unsigned long flags;
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
/* need to shutdown RXQ before modifying filter parameters */
ks8851_wrreg16(ks, KS_RXCR1, 0x00);
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
}
static void ks8851_set_rx_mode(struct net_device *dev)
@@ -1104,11 +1135,6 @@ static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee)
*/
static int ks8851_eeprom_claim(struct ks8851_net *ks)
{
- if (!(ks->rc_ccr & CCR_EEPROM))
- return -ENOENT;
-
- mutex_lock(&ks->lock);
-
/* start with clock low, cs high */
ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS);
return 0;
@@ -1125,7 +1151,6 @@ static void ks8851_eeprom_release(struct ks8851_net *ks)
unsigned val = ks8851_rdreg16(ks, KS_EEPCR);
ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA);
- mutex_unlock(&ks->lock);
}
#define KS_EEPROM_MAGIC (0x00008851)
@@ -1135,6 +1160,7 @@ static int ks8851_set_eeprom(struct net_device *dev,
{
struct ks8851_net *ks = netdev_priv(dev);
int offset = ee->offset;
+ unsigned long flags;
int len = ee->len;
u16 tmp;
@@ -1145,9 +1171,13 @@ static int ks8851_set_eeprom(struct net_device *dev,
if (ee->magic != KS_EEPROM_MAGIC)
return -EINVAL;
- if (ks8851_eeprom_claim(ks))
+ if (!(ks->rc_ccr & CCR_EEPROM))
return -ENOENT;
+ ks8851_lock(ks, &flags);
+
+ ks8851_eeprom_claim(ks);
+
eeprom_93cx6_wren(&ks->eeprom, true);
/* ethtool currently only supports writing bytes, which means
@@ -1167,6 +1197,7 @@ static int ks8851_set_eeprom(struct net_device *dev,
eeprom_93cx6_wren(&ks->eeprom, false);
ks8851_eeprom_release(ks);
+ ks8851_unlock(ks, &flags);
return 0;
}
@@ -1176,19 +1207,25 @@ static int ks8851_get_eeprom(struct net_device *dev,
{
struct ks8851_net *ks = netdev_priv(dev);
int offset = ee->offset;
+ unsigned long flags;
int len = ee->len;
/* must be 2 byte aligned */
if (len & 1 || offset & 1)
return -EINVAL;
- if (ks8851_eeprom_claim(ks))
+ if (!(ks->rc_ccr & CCR_EEPROM))
return -ENOENT;
+ ks8851_lock(ks, &flags);
+
+ ks8851_eeprom_claim(ks);
+
ee->magic = KS_EEPROM_MAGIC;
eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2);
ks8851_eeprom_release(ks);
+ ks8851_unlock(ks, &flags);
return 0;
}
@@ -1262,6 +1299,7 @@ static int ks8851_phy_reg(int reg)
static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg)
{
struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
int ksreg;
int result;
@@ -1269,9 +1307,9 @@ static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg)
if (!ksreg)
return 0x0; /* no error return allowed, so use zero */
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
result = ks8851_rdreg16(ks, ksreg);
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
return result;
}
@@ -1280,13 +1318,14 @@ static void ks8851_phy_write(struct net_device *dev,
int phy, int reg, int value)
{
struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
int ksreg;
ksreg = ks8851_phy_reg(reg);
if (ksreg) {
- mutex_lock(&ks->lock);
+ ks8851_lock(ks, &flags);
ks8851_wrreg16(ks, ksreg, value);
- mutex_unlock(&ks->lock);
+ ks8851_unlock(ks, &flags);
}
}
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