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Message-Id: <201008092203.52599.florian@openwrt.org>
Date: Mon, 9 Aug 2010 22:03:51 +0200
From: Florian Fainelli <florian@...nwrt.org>
To: netdev@...r.kernel.org, David Miller <davem@...emloft.net>
Subject: [PATCH 6/6] au1000-eth: remove volatiles, switch to I/O accessors
Remove all the volatile keywords where they were used, switch to using the
proper readl/writel accessors.
Signed-off-by: Florian Fainelli <florian@...nwrt.org>
---
diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index 4605c3d..3efb4ed 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -161,10 +161,10 @@ static void au1000_enable_mac(struct net_device *dev, int force_reset)
spin_lock_irqsave(&aup->lock, flags);
if (force_reset || (!aup->mac_enabled)) {
- *aup->enable = MAC_EN_CLOCK_ENABLE;
+ writel(MAC_EN_CLOCK_ENABLE, &aup->enable);
au_sync_delay(2);
- *aup->enable = (MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2
- | MAC_EN_CLOCK_ENABLE);
+ writel((MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2
+ | MAC_EN_CLOCK_ENABLE), &aup->enable);
au_sync_delay(2);
aup->mac_enabled = 1;
@@ -179,12 +179,12 @@ static void au1000_enable_mac(struct net_device *dev, int force_reset)
static int au1000_mdio_read(struct net_device *dev, int phy_addr, int reg)
{
struct au1000_private *aup = netdev_priv(dev);
- volatile u32 *const mii_control_reg = &aup->mac->mii_control;
- volatile u32 *const mii_data_reg = &aup->mac->mii_data;
+ u32 *const mii_control_reg = &aup->mac->mii_control;
+ u32 *const mii_data_reg = &aup->mac->mii_data;
u32 timedout = 20;
u32 mii_control;
- while (*mii_control_reg & MAC_MII_BUSY) {
+ while (readl(mii_control_reg) & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
netdev_err(dev, "read_MII busy timeout!!\n");
@@ -195,29 +195,29 @@ static int au1000_mdio_read(struct net_device *dev, int phy_addr, int reg)
mii_control = MAC_SET_MII_SELECT_REG(reg) |
MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_READ;
- *mii_control_reg = mii_control;
+ writel(mii_control, mii_control_reg);
timedout = 20;
- while (*mii_control_reg & MAC_MII_BUSY) {
+ while (readl(mii_control_reg) & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
netdev_err(dev, "mdio_read busy timeout!!\n");
return -1;
}
}
- return (int)*mii_data_reg;
+ return readl(mii_data_reg);
}
static void au1000_mdio_write(struct net_device *dev, int phy_addr,
int reg, u16 value)
{
struct au1000_private *aup = netdev_priv(dev);
- volatile u32 *const mii_control_reg = &aup->mac->mii_control;
- volatile u32 *const mii_data_reg = &aup->mac->mii_data;
+ u32 *const mii_control_reg = &aup->mac->mii_control;
+ u32 *const mii_data_reg = &aup->mac->mii_data;
u32 timedout = 20;
u32 mii_control;
- while (*mii_control_reg & MAC_MII_BUSY) {
+ while (readl(mii_control_reg) & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
netdev_err(dev, "mdio_write busy timeout!!\n");
@@ -228,8 +228,8 @@ static void au1000_mdio_write(struct net_device *dev, int phy_addr,
mii_control = MAC_SET_MII_SELECT_REG(reg) |
MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_WRITE;
- *mii_data_reg = value;
- *mii_control_reg = mii_control;
+ writel(value, mii_data_reg);
+ writel(mii_control, mii_control_reg);
}
static int au1000_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
@@ -266,20 +266,26 @@ static int au1000_mdiobus_reset(struct mii_bus *bus)
static void au1000_hard_stop(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
+ u32 reg;
netif_dbg(aup, drv, dev, "hard stop\n");
- aup->mac->control &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE);
+ reg = readl(&aup->mac->control);
+ reg &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE);
+ writel(reg, &aup->mac->control);
au_sync_delay(10);
}
static void au1000_enable_rx_tx(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
+ u32 reg;
netif_dbg(aup, hw, dev, "enable_rx_tx\n");
- aup->mac->control |= (MAC_RX_ENABLE | MAC_TX_ENABLE);
+ reg = readl(&aup->mac->control);
+ reg |= (MAC_RX_ENABLE | MAC_TX_ENABLE);
+ writel(reg, &aup->mac->control);
au_sync_delay(10);
}
@@ -289,6 +295,7 @@ au1000_adjust_link(struct net_device *dev)
struct au1000_private *aup = netdev_priv(dev);
struct phy_device *phydev = aup->phy_dev;
unsigned long flags;
+ u32 reg;
int status_change = 0;
@@ -320,14 +327,15 @@ au1000_adjust_link(struct net_device *dev)
/* switching duplex mode requires to disable rx and tx! */
au1000_hard_stop(dev);
- if (DUPLEX_FULL == phydev->duplex)
- aup->mac->control = ((aup->mac->control
- | MAC_FULL_DUPLEX)
- & ~MAC_DISABLE_RX_OWN);
- else
- aup->mac->control = ((aup->mac->control
- & ~MAC_FULL_DUPLEX)
- | MAC_DISABLE_RX_OWN);
+ reg = readl(&aup->mac->control);
+ if (DUPLEX_FULL == phydev->duplex) {
+ reg |= MAC_FULL_DUPLEX;
+ reg &= ~MAC_DISABLE_RX_OWN;
+ } else {
+ reg &= ~MAC_FULL_DUPLEX;
+ reg |= MAC_DISABLE_RX_OWN;
+ }
+ writel(reg, &aup->mac->control);
au_sync_delay(1);
au1000_enable_rx_tx(dev);
@@ -493,9 +501,9 @@ static void au1000_reset_mac_unlocked(struct net_device *dev)
au1000_hard_stop(dev);
- *aup->enable = MAC_EN_CLOCK_ENABLE;
+ writel(MAC_EN_CLOCK_ENABLE, &aup->enable);
au_sync_delay(2);
- *aup->enable = 0;
+ writel(0, &aup->enable);
au_sync_delay(2);
aup->tx_full = 0;
@@ -539,12 +547,12 @@ au1000_setup_hw_rings(struct au1000_private *aup, u32 rx_base, u32 tx_base)
for (i = 0; i < NUM_RX_DMA; i++) {
aup->rx_dma_ring[i] =
- (volatile struct rx_dma *)
+ (struct rx_dma *)
(rx_base + sizeof(struct rx_dma)*i);
}
for (i = 0; i < NUM_TX_DMA; i++) {
aup->tx_dma_ring[i] =
- (volatile struct tx_dma *)
+ (struct tx_dma *)
(tx_base + sizeof(struct tx_dma)*i);
}
}
@@ -633,14 +641,16 @@ static int au1000_init(struct net_device *dev)
spin_lock_irqsave(&aup->lock, flags);
- aup->mac->control = 0;
+ writel(0, &aup->mac->control);
aup->tx_head = (aup->tx_dma_ring[0]->buff_stat & 0xC) >> 2;
aup->tx_tail = aup->tx_head;
aup->rx_head = (aup->rx_dma_ring[0]->buff_stat & 0xC) >> 2;
- aup->mac->mac_addr_high = dev->dev_addr[5]<<8 | dev->dev_addr[4];
- aup->mac->mac_addr_low = dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 |
- dev->dev_addr[1]<<8 | dev->dev_addr[0];
+ writel(dev->dev_addr[5]<<8 | dev->dev_addr[4],
+ &aup->mac->mac_addr_high);
+ writel(dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 |
+ dev->dev_addr[1]<<8 | dev->dev_addr[0],
+ &aup->mac->mac_addr_low);
for (i = 0; i < NUM_RX_DMA; i++)
@@ -661,8 +671,8 @@ static int au1000_init(struct net_device *dev)
control |= MAC_FULL_DUPLEX;
}
- aup->mac->control = control;
- aup->mac->vlan1_tag = 0x8100; /* activate vlan support */
+ writel(control, &aup->mac->control);
+ writel(0x8100, &aup->mac->vlan1_tag); /* activate vlan support */
au_sync();
spin_unlock_irqrestore(&aup->lock, flags);
@@ -699,7 +709,7 @@ static int au1000_rx(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct sk_buff *skb;
- volatile struct rx_dma *prxd;
+ struct rx_dma *prxd;
u32 buff_stat, status;
struct db_dest *pDB;
u32 frmlen;
@@ -794,7 +804,7 @@ static void au1000_update_tx_stats(struct net_device *dev, u32 status)
static void au1000_tx_ack(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
- volatile struct tx_dma *ptxd;
+ struct tx_dma *ptxd;
ptxd = aup->tx_dma_ring[aup->tx_tail];
@@ -893,7 +903,7 @@ static netdev_tx_t au1000_tx(struct sk_buff *skb, struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct net_device_stats *ps = &dev->stats;
- volatile struct tx_dma *ptxd;
+ struct tx_dma *ptxd;
u32 buff_stat;
struct db_dest *pDB;
int i;
@@ -955,15 +965,18 @@ static void au1000_tx_timeout(struct net_device *dev)
static void au1000_multicast_list(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
+ u32 reg;
netif_dbg(aup, drv, dev, "au1000_multicast_list: flags=%x\n",
dev->flags);
+
+ reg = readl(&aup->mac->control);
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
- aup->mac->control |= MAC_PROMISCUOUS;
+ reg |= MAC_PROMISCUOUS;
} else if ((dev->flags & IFF_ALLMULTI) ||
netdev_mc_count(dev) > MULTICAST_FILTER_LIMIT) {
- aup->mac->control |= MAC_PASS_ALL_MULTI;
- aup->mac->control &= ~MAC_PROMISCUOUS;
+ reg |= MAC_PASS_ALL_MULTI;
+ reg &= ~MAC_PROMISCUOUS;
netdev_info(dev, "Pass all multicast\n");
} else {
struct netdev_hw_addr *ha;
@@ -973,11 +986,12 @@ static void au1000_multicast_list(struct net_device *dev)
netdev_for_each_mc_addr(ha, dev)
set_bit(ether_crc(ETH_ALEN, ha->addr)>>26,
(long *)mc_filter);
- aup->mac->multi_hash_high = mc_filter[1];
- aup->mac->multi_hash_low = mc_filter[0];
- aup->mac->control &= ~MAC_PROMISCUOUS;
- aup->mac->control |= MAC_HASH_MODE;
+ writel(mc_filter[1], &aup->mac->multi_hash_high);
+ writel(mc_filter[0], &aup->mac->multi_hash_low);
+ reg &= ~MAC_PROMISCUOUS;
+ reg |= MAC_HASH_MODE;
}
+ writel(reg, &aup->mac->control);
}
static int au1000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
@@ -1080,7 +1094,7 @@ static int __devinit au1000_probe(struct platform_device *pdev)
}
/* aup->mac is the base address of the MAC's registers */
- aup->mac = (volatile struct mac_reg *)
+ aup->mac = (struct mac_reg *)
ioremap_nocache(base->start, resource_size(base));
if (!aup->mac) {
dev_err(&pdev->dev, "failed to ioremap MAC registers\n");
@@ -1089,7 +1103,7 @@ static int __devinit au1000_probe(struct platform_device *pdev)
}
/* Setup some variables for quick register address access */
- aup->enable = (volatile u32 *)ioremap_nocache(macen->start,
+ aup->enable = (u32 *)ioremap_nocache(macen->start,
resource_size(macen));
if (!aup->enable) {
dev_err(&pdev->dev, "failed to ioremap MAC enable register\n");
@@ -1118,7 +1132,7 @@ static int __devinit au1000_probe(struct platform_device *pdev)
memcpy(dev->dev_addr, au1000_mac_addr, sizeof(au1000_mac_addr));
dev->dev_addr[5] += pdev->id;
- *aup->enable = 0;
+ writel(0, &aup->enable);
aup->mac_enabled = 0;
pd = pdev->dev.platform_data;
diff --git a/drivers/net/au1000_eth.h b/drivers/net/au1000_eth.h
index 38c1d88..4b638df 100644
--- a/drivers/net/au1000_eth.h
+++ b/drivers/net/au1000_eth.h
@@ -46,7 +46,7 @@
*/
struct db_dest {
struct db_dest *pnext;
- volatile u32 *vaddr;
+ u32 *vaddr;
dma_addr_t dma_addr;
};
@@ -88,8 +88,8 @@ struct mac_reg {
struct au1000_private {
struct db_dest *pDBfree;
struct db_dest db[NUM_RX_BUFFS+NUM_TX_BUFFS];
- volatile struct rx_dma *rx_dma_ring[NUM_RX_DMA];
- volatile struct tx_dma *tx_dma_ring[NUM_TX_DMA];
+ struct rx_dma *rx_dma_ring[NUM_RX_DMA];
+ struct tx_dma *tx_dma_ring[NUM_TX_DMA];
struct db_dest *rx_db_inuse[NUM_RX_DMA];
struct db_dest *tx_db_inuse[NUM_TX_DMA];
u32 rx_head;
@@ -120,8 +120,8 @@ struct au1000_private {
/* These variables are just for quick access
* to certain regs addresses. */
- volatile struct mac_reg *mac; /* mac registers */
- volatile u32 *enable; /* address of MAC Enable Register */
+ struct mac_reg *mac; /* mac registers */
+ u32 *enable; /* address of MAC Enable Register */
u32 vaddr; /* virtual address of rx/tx buffers */
dma_addr_t dma_addr; /* dma address of rx/tx buffers */
--
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