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authorTomoya <tomoya-linux@dsn.okisemi.com>2010-12-12 20:24:09 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-13 12:24:19 -0800
commit8ac9702b9d5d81b819fc7d6b4f6abad22af01f3c (patch)
tree7301e2e3033cad0fcec89c17996c4adc9185212b
parente489ccebf14657774fd877dc841b458703730586 (diff)
pch_can: Fix endianness issue
there is endianness issue both Tx and Rx. Currently, data is set like below. Register: MSB--LSB x x D0 D1 x x D2 D3 x x D4 D5 x x D6 D7 But Data to be sent must be set like below. Register: MSB--LSB x x D1 D0 x x D3 D2 x x D5 D4 x x D7 D6 (x means reserved area.) Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/can/pch_can.c47
1 files changed, 20 insertions, 27 deletions
diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c
index 0b6d4f49029..210957f093b 100644
--- a/drivers/net/can/pch_can.c
+++ b/drivers/net/can/pch_can.c
@@ -138,10 +138,7 @@ struct pch_can_if_regs {
u32 id1;
u32 id2;
u32 mcont;
- u32 dataa1;
- u32 dataa2;
- u32 datab1;
- u32 datab2;
+ u32 data[4];
u32 rsv[13];
};
@@ -424,10 +421,10 @@ static void pch_can_clear_buffers(struct pch_can_priv *priv)
iowrite32(0x0, &priv->regs->ifregs[0].id1);
iowrite32(0x0, &priv->regs->ifregs[0].id2);
iowrite32(0x0, &priv->regs->ifregs[0].mcont);
- iowrite32(0x0, &priv->regs->ifregs[0].dataa1);
- iowrite32(0x0, &priv->regs->ifregs[0].dataa2);
- iowrite32(0x0, &priv->regs->ifregs[0].datab1);
- iowrite32(0x0, &priv->regs->ifregs[0].datab2);
+ iowrite32(0x0, &priv->regs->ifregs[0].data[0]);
+ iowrite32(0x0, &priv->regs->ifregs[0].data[1]);
+ iowrite32(0x0, &priv->regs->ifregs[0].data[2]);
+ iowrite32(0x0, &priv->regs->ifregs[0].data[3]);
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_MASK |
PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->ifregs[0].cmask);
@@ -441,10 +438,10 @@ static void pch_can_clear_buffers(struct pch_can_priv *priv)
iowrite32(0x0, &priv->regs->ifregs[1].id1);
iowrite32(0x0, &priv->regs->ifregs[1].id2);
iowrite32(0x0, &priv->regs->ifregs[1].mcont);
- iowrite32(0x0, &priv->regs->ifregs[1].dataa1);
- iowrite32(0x0, &priv->regs->ifregs[1].dataa2);
- iowrite32(0x0, &priv->regs->ifregs[1].datab1);
- iowrite32(0x0, &priv->regs->ifregs[1].datab2);
+ iowrite32(0x0, &priv->regs->ifregs[1].data[0]);
+ iowrite32(0x0, &priv->regs->ifregs[1].data[1]);
+ iowrite32(0x0, &priv->regs->ifregs[1].data[2]);
+ iowrite32(0x0, &priv->regs->ifregs[1].data[3]);
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_MASK |
PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->ifregs[1].cmask);
@@ -707,12 +704,13 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 int_stat)
canid_t id;
u32 ide;
u32 rtr;
- int i, j, k;
+ int i, k;
int rcv_pkts = 0;
struct sk_buff *skb;
struct can_frame *cf;
struct pch_can_priv *priv = netdev_priv(ndev);
struct net_device_stats *stats = &(priv->ndev->stats);
+ u16 data_reg;
/* Reading the messsage object from the Message RAM */
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[0].cmask);
@@ -778,12 +776,10 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 int_stat)
((ioread32(&priv->regs->ifregs[0].mcont)) & 0x0f);
}
- for (i = 0, j = 0; i < cf->can_dlc; j++) {
- reg = ioread32(&priv->regs->ifregs[0].dataa1 + j*4);
- cf->data[i++] = cpu_to_le32(reg & 0xff);
- if (i == cf->can_dlc)
- break;
- cf->data[i++] = cpu_to_le32((reg >> 8) & 0xff);
+ for (i = 0; i < cf->can_dlc; i += 2) {
+ data_reg = ioread16(&priv->regs->ifregs[0].data[i / 2]);
+ cf->data[i] = data_reg;
+ cf->data[i + 1] = data_reg >> 8;
}
netif_receive_skb(skb);
@@ -1016,10 +1012,10 @@ static int pch_close(struct net_device *ndev)
static netdev_tx_t pch_xmit(struct sk_buff *skb, struct net_device *ndev)
{
- int i, j;
struct pch_can_priv *priv = netdev_priv(ndev);
struct can_frame *cf = (struct can_frame *)skb->data;
int tx_buffer_avail = 0;
+ int i;
if (can_dropped_invalid_skb(ndev, skb))
return NETDEV_TX_OK;
@@ -1060,13 +1056,10 @@ static netdev_tx_t pch_xmit(struct sk_buff *skb, struct net_device *ndev)
if (cf->can_id & CAN_RTR_FLAG)
pch_can_bit_clear(&priv->regs->ifregs[1].id2, PCH_ID2_DIR);
- for (i = 0, j = 0; i < cf->can_dlc; j++) {
- iowrite32(le32_to_cpu(cf->data[i++]),
- (&priv->regs->ifregs[1].dataa1) + j*4);
- if (i == cf->can_dlc)
- break;
- iowrite32(le32_to_cpu(cf->data[i++] << 8),
- (&priv->regs->ifregs[1].dataa1) + j*4);
+ /* Copy data to register */
+ for (i = 0; i < cf->can_dlc; i += 2) {
+ iowrite16(cf->data[i] | (cf->data[i + 1] << 8),
+ &priv->regs->ifregs[1].data[i / 2]);
}
can_put_echo_skb(skb, ndev, tx_buffer_avail - PCH_RX_OBJ_END - 1);