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Message-Id: <1459355920-14623-1-git-send-email-akinobu.mita@gmail.com>
Date: Thu, 31 Mar 2016 01:38:37 +0900
From: Akinobu Mita <akinobu.mita@...il.com>
To: netdev@...r.kernel.org
Cc: Akinobu Mita <akinobu.mita@...il.com>,
Mike Sinkovsky <msink@...monline.ru>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 1/4] net: w5100: move mmiowb into register access callbacks
Instead of sprinkle mmiowb over the driver code, move it into primary
register write callbacks. (w5100_write, w5100_write16, w5100_writebuf)
This is a preparation for supporting SPI interface which doesn't use
MMIO for accessing w5100 registers.
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
Cc: Mike Sinkovsky <msink@...monline.ru>
Cc: David S. Miller <davem@...emloft.net>
---
drivers/net/ethernet/wiznet/w5100.c | 44 +++++++++++++------------------------
1 file changed, 15 insertions(+), 29 deletions(-)
diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c
index 8b282d0..f4b7200 100644
--- a/drivers/net/ethernet/wiznet/w5100.c
+++ b/drivers/net/ethernet/wiznet/w5100.c
@@ -122,10 +122,17 @@ static inline u8 w5100_read_direct(struct w5100_priv *priv, u16 addr)
return ioread8(priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
}
+static inline void __w5100_write_direct(struct w5100_priv *priv, u16 addr,
+ u8 data)
+{
+ iowrite8(data, priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
+}
+
static inline void w5100_write_direct(struct w5100_priv *priv,
u16 addr, u8 data)
{
- iowrite8(data, priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
+ __w5100_write_direct(priv, addr, data);
+ mmiowb();
}
static u16 w5100_read16_direct(struct w5100_priv *priv, u16 addr)
@@ -138,8 +145,9 @@ static u16 w5100_read16_direct(struct w5100_priv *priv, u16 addr)
static void w5100_write16_direct(struct w5100_priv *priv, u16 addr, u16 data)
{
- w5100_write_direct(priv, addr, data >> 8);
- w5100_write_direct(priv, addr + 1, data);
+ __w5100_write_direct(priv, addr, data >> 8);
+ __w5100_write_direct(priv, addr + 1, data);
+ mmiowb();
}
static void w5100_readbuf_direct(struct w5100_priv *priv,
@@ -164,8 +172,9 @@ static void w5100_writebuf_direct(struct w5100_priv *priv,
for (i = 0; i < len; i++, addr++) {
if (unlikely(addr > W5100_TX_MEM_END))
addr = W5100_TX_MEM_START;
- w5100_write_direct(priv, addr, *buf++);
+ __w5100_write_direct(priv, addr, *buf++);
}
+ mmiowb();
}
/*
@@ -186,7 +195,6 @@ static u8 w5100_read_indirect(struct w5100_priv *priv, u16 addr)
spin_lock_irqsave(&priv->reg_lock, flags);
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
data = w5100_read_direct(priv, W5100_IDM_DR);
spin_unlock_irqrestore(&priv->reg_lock, flags);
@@ -199,9 +207,7 @@ static void w5100_write_indirect(struct w5100_priv *priv, u16 addr, u8 data)
spin_lock_irqsave(&priv->reg_lock, flags);
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
w5100_write_direct(priv, W5100_IDM_DR, data);
- mmiowb();
spin_unlock_irqrestore(&priv->reg_lock, flags);
}
@@ -212,7 +218,6 @@ static u16 w5100_read16_indirect(struct w5100_priv *priv, u16 addr)
spin_lock_irqsave(&priv->reg_lock, flags);
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
data = w5100_read_direct(priv, W5100_IDM_DR) << 8;
data |= w5100_read_direct(priv, W5100_IDM_DR);
spin_unlock_irqrestore(&priv->reg_lock, flags);
@@ -226,10 +231,8 @@ static void w5100_write16_indirect(struct w5100_priv *priv, u16 addr, u16 data)
spin_lock_irqsave(&priv->reg_lock, flags);
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
- w5100_write_direct(priv, W5100_IDM_DR, data >> 8);
+ __w5100_write_direct(priv, W5100_IDM_DR, data >> 8);
w5100_write_direct(priv, W5100_IDM_DR, data);
- mmiowb();
spin_unlock_irqrestore(&priv->reg_lock, flags);
}
@@ -242,13 +245,11 @@ static void w5100_readbuf_indirect(struct w5100_priv *priv,
spin_lock_irqsave(&priv->reg_lock, flags);
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
for (i = 0; i < len; i++, addr++) {
if (unlikely(addr > W5100_RX_MEM_END)) {
addr = W5100_RX_MEM_START;
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
}
*buf++ = w5100_read_direct(priv, W5100_IDM_DR);
}
@@ -265,15 +266,13 @@ static void w5100_writebuf_indirect(struct w5100_priv *priv,
spin_lock_irqsave(&priv->reg_lock, flags);
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
for (i = 0; i < len; i++, addr++) {
if (unlikely(addr > W5100_TX_MEM_END)) {
addr = W5100_TX_MEM_START;
w5100_write16_direct(priv, W5100_IDM_AR, addr);
- mmiowb();
}
- w5100_write_direct(priv, W5100_IDM_DR, *buf++);
+ __w5100_write_direct(priv, W5100_IDM_DR, *buf++);
}
mmiowb();
spin_unlock_irqrestore(&priv->reg_lock, flags);
@@ -309,7 +308,6 @@ static int w5100_command(struct w5100_priv *priv, u16 cmd)
unsigned long timeout = jiffies + msecs_to_jiffies(100);
w5100_write(priv, W5100_S0_CR, cmd);
- mmiowb();
while (w5100_read(priv, W5100_S0_CR) != 0) {
if (time_after(jiffies, timeout))
@@ -327,18 +325,15 @@ static void w5100_write_macaddr(struct w5100_priv *priv)
for (i = 0; i < ETH_ALEN; i++)
w5100_write(priv, W5100_SHAR + i, ndev->dev_addr[i]);
- mmiowb();
}
static void w5100_hw_reset(struct w5100_priv *priv)
{
w5100_write_direct(priv, W5100_MR, MR_RST);
- mmiowb();
mdelay(5);
w5100_write_direct(priv, W5100_MR, priv->indirect ?
MR_PB | MR_AI | MR_IND :
MR_PB);
- mmiowb();
w5100_write(priv, W5100_IMR, 0);
w5100_write_macaddr(priv);
@@ -347,23 +342,19 @@ static void w5100_hw_reset(struct w5100_priv *priv)
*/
w5100_write(priv, W5100_RMSR, 0x03);
w5100_write(priv, W5100_TMSR, 0x03);
- mmiowb();
}
static void w5100_hw_start(struct w5100_priv *priv)
{
w5100_write(priv, W5100_S0_MR, priv->promisc ?
S0_MR_MACRAW : S0_MR_MACRAW_MF);
- mmiowb();
w5100_command(priv, S0_CR_OPEN);
w5100_write(priv, W5100_IMR, IR_S0);
- mmiowb();
}
static void w5100_hw_close(struct w5100_priv *priv)
{
w5100_write(priv, W5100_IMR, 0);
- mmiowb();
w5100_command(priv, S0_CR_CLOSE);
}
@@ -447,7 +438,6 @@ static int w5100_start_tx(struct sk_buff *skb, struct net_device *ndev)
offset = w5100_read16(priv, W5100_S0_TX_WR);
w5100_writebuf(priv, offset, skb->data, skb->len);
w5100_write16(priv, W5100_S0_TX_WR, offset + skb->len);
- mmiowb();
ndev->stats.tx_bytes += skb->len;
ndev->stats.tx_packets++;
dev_kfree_skb(skb);
@@ -488,7 +478,6 @@ static int w5100_napi_poll(struct napi_struct *napi, int budget)
skb_put(skb, rx_len);
w5100_readbuf(priv, offset + 2, skb->data, rx_len);
w5100_write16(priv, W5100_S0_RX_RD, offset + 2 + rx_len);
- mmiowb();
w5100_command(priv, S0_CR_RECV);
skb->protocol = eth_type_trans(skb, ndev);
@@ -500,7 +489,6 @@ static int w5100_napi_poll(struct napi_struct *napi, int budget)
if (rx_count < budget) {
napi_complete(napi);
w5100_write(priv, W5100_IMR, IR_S0);
- mmiowb();
}
return rx_count;
@@ -515,7 +503,6 @@ static irqreturn_t w5100_interrupt(int irq, void *ndev_instance)
if (!ir)
return IRQ_NONE;
w5100_write(priv, W5100_S0_IR, ir);
- mmiowb();
if (ir & S0_IR_SENDOK) {
netif_dbg(priv, tx_done, ndev, "tx done\n");
@@ -525,7 +512,6 @@ static irqreturn_t w5100_interrupt(int irq, void *ndev_instance)
if (ir & S0_IR_RECV) {
if (napi_schedule_prep(&priv->napi)) {
w5100_write(priv, W5100_IMR, 0);
- mmiowb();
__napi_schedule(&priv->napi);
}
}
--
2.5.0
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