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can: EG20T PCH: Separate Interface Register(IF1/IF2)

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CAN register of Intel PCH EG20T has 2 sets of interface register.
To reduce whole of code size, separate interface register.
As a result, the number of function also can be reduced.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tomoya 2010-11-29 18:11:52 +00:00 committed by David S. Miller
parent db3949c450
commit 8339a7ed56
1 changed files with 202 additions and 245 deletions
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447
drivers/net/can/pch_can.c
View File

@ -113,6 +113,11 @@
#define PCH_FIFO_THRESH 16
enum pch_ifreg {
PCH_RX_IFREG,
PCH_TX_IFREG,
};
enum pch_can_mode {
PCH_CAN_ENABLE,
PCH_CAN_DISABLE,
@ -122,6 +127,21 @@ enum pch_can_mode {
PCH_CAN_RUN
};
struct pch_can_if_regs {
u32 creq;
u32 cmask;
u32 mask1;
u32 mask2;
u32 id1;
u32 id2;
u32 mcont;
u32 dataa1;
u32 dataa2;
u32 datab1;
u32 datab2;
u32 rsv[13];
};
struct pch_can_regs {
u32 cont;
u32 stat;
@ -130,38 +150,21 @@ struct pch_can_regs {
u32 intr;
u32 opt;
u32 brpe;
u32 reserve1;
u32 if1_creq;
u32 if1_cmask;
u32 if1_mask1;
u32 if1_mask2;
u32 if1_id1;
u32 if1_id2;
u32 if1_mcont;
u32 if1_dataa1;
u32 if1_dataa2;
u32 if1_datab1;
u32 if1_datab2;
u32 reserve2;
u32 reserve3[12];
u32 if2_creq;
u32 if2_cmask;
u32 if2_mask1;
u32 if2_mask2;
u32 if2_id1;
u32 if2_id2;
u32 if2_mcont;
u32 if2_dataa1;
u32 if2_dataa2;
u32 if2_datab1;
u32 if2_datab2;
u32 reserve4;
u32 reserve5[20];
u32 reserve;
struct pch_can_if_regs ifregs[2]; /* [0]=if1 [1]=if2 */
u32 reserve1[8];
u32 treq1;
u32 treq2;
u32 reserve6[2];
u32 reserve7[56];
u32 reserve8[3];
u32 reserve2[6];
u32 data1;
u32 data2;
u32 reserve3[6];
u32 canipend1;
u32 canipend2;
u32 reserve4[6];
u32 canmval1;
u32 canmval2;
u32 reserve5[37];
u32 srst;
};
@ -303,143 +306,87 @@ static void pch_can_check_if_busy(u32 __iomem *creq_addr, u32 num)
pr_err("%s:IF1 BUSY Flag is set forever.\n", __func__);
}
static void pch_can_set_rx_enable(struct pch_can_priv *priv, u32 buff_num,
u32 set)
static void pch_can_set_rxtx(struct pch_can_priv *priv, u32 buff_num,
u32 set, enum pch_ifreg dir)
{
unsigned long flags;
u32 ie;
if (dir)
ie = PCH_IF_MCONT_TXIE;
else
ie = PCH_IF_MCONT_RXIE;
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
/* Reading the receive buffer data from RAM to Interface1 registers */
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, buff_num);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[dir].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[dir].creq, buff_num);
/* Setting the IF1MASK1 register to access MsgVal and RxIE bits */
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->if1_cmask);
&priv->regs->ifregs[dir].cmask);
if (set == PCH_ENABLE) {
/* Setting the MsgVal and RxIE bits */
pch_can_bit_set(&priv->regs->if1_mcont, PCH_IF_MCONT_RXIE);
pch_can_bit_set(&priv->regs->if1_id2, PCH_ID_MSGVAL);
pch_can_bit_set(&priv->regs->ifregs[dir].mcont, ie);
pch_can_bit_set(&priv->regs->ifregs[dir].id2, PCH_ID_MSGVAL);
} else if (set == PCH_DISABLE) {
/* Resetting the MsgVal and RxIE bits */
pch_can_bit_clear(&priv->regs->if1_mcont, PCH_IF_MCONT_RXIE);
pch_can_bit_clear(&priv->regs->if1_id2, PCH_ID_MSGVAL);
pch_can_bit_clear(&priv->regs->ifregs[dir].mcont, ie);
pch_can_bit_clear(&priv->regs->ifregs[dir].id2, PCH_ID_MSGVAL);
}
pch_can_check_if_busy(&priv->regs->if1_creq, buff_num);
pch_can_check_if_busy(&priv->regs->ifregs[dir].creq, buff_num);
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
}
static void pch_can_rx_enable_all(struct pch_can_priv *priv)
static void pch_can_set_rx_all(struct pch_can_priv *priv, u32 set)
{
int i;
/* Traversing to obtain the object configured as receivers. */
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_RX)
pch_can_set_rx_enable(priv, i + 1, PCH_ENABLE);
pch_can_set_rxtx(priv, i + 1, set, PCH_RX_IFREG);
}
}
static void pch_can_rx_disable_all(struct pch_can_priv *priv)
{
int i;
/* Traversing to obtain the object configured as receivers. */
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_RX)
pch_can_set_rx_enable(priv, i + 1, PCH_DISABLE);
}
}
static void pch_can_set_tx_enable(struct pch_can_priv *priv, u32 buff_num,
u32 set)
{
unsigned long flags;
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
/* Reading the Msg buffer from Message RAM to Interface2 registers. */
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if2_cmask);
pch_can_check_if_busy(&priv->regs->if2_creq, buff_num);
/* Setting the IF2CMASK register for accessing the
MsgVal and TxIE bits */
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->if2_cmask);
if (set == PCH_ENABLE) {
/* Setting the MsgVal and TxIE bits */
pch_can_bit_set(&priv->regs->if2_mcont, PCH_IF_MCONT_TXIE);
pch_can_bit_set(&priv->regs->if2_id2, PCH_ID_MSGVAL);
} else if (set == PCH_DISABLE) {
/* Resetting the MsgVal and TxIE bits. */
pch_can_bit_clear(&priv->regs->if2_mcont, PCH_IF_MCONT_TXIE);
pch_can_bit_clear(&priv->regs->if2_id2, PCH_ID_MSGVAL);
}
pch_can_check_if_busy(&priv->regs->if2_creq, buff_num);
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
}
static void pch_can_tx_enable_all(struct pch_can_priv *priv)
static void pch_can_set_tx_all(struct pch_can_priv *priv, u32 set)
{
int i;
/* Traversing to obtain the object configured as transmit object. */
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_TX)
pch_can_set_tx_enable(priv, i + 1, PCH_ENABLE);
pch_can_set_rxtx(priv, i + 1, set, PCH_TX_IFREG);
}
}
static void pch_can_tx_disable_all(struct pch_can_priv *priv)
{
int i;
/* Traversing to obtain the object configured as transmit object. */
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_TX)
pch_can_set_tx_enable(priv, i + 1, PCH_DISABLE);
}
}
static void pch_can_get_rx_enable(struct pch_can_priv *priv, u32 buff_num,
u32 *enable)
static u32 pch_can_get_rxtx_ir(struct pch_can_priv *priv, u32 buff_num,
enum pch_ifreg dir)
{
unsigned long flags;
u32 ie, enable;
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, buff_num);
if (((ioread32(&priv->regs->if1_id2)) & PCH_ID_MSGVAL) &&
((ioread32(&priv->regs->if1_mcont)) &
PCH_IF_MCONT_RXIE))
*enable = PCH_ENABLE;
if (dir)
ie = PCH_IF_MCONT_RXIE;
else
*enable = PCH_DISABLE;
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
}
static void pch_can_get_tx_enable(struct pch_can_priv *priv, u32 buff_num,
u32 *enable)
{
unsigned long flags;
ie = PCH_IF_MCONT_TXIE;
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if2_cmask);
pch_can_check_if_busy(&priv->regs->if2_creq, buff_num);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[dir].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[dir].creq, buff_num);
if (((ioread32(&priv->regs->if2_id2)) & PCH_ID_MSGVAL) &&
((ioread32(&priv->regs->if2_mcont)) &
PCH_IF_MCONT_TXIE)) {
*enable = PCH_ENABLE;
if (((ioread32(&priv->regs->ifregs[dir].id2)) & PCH_ID_MSGVAL) &&
((ioread32(&priv->regs->ifregs[dir].mcont)) & ie)) {
enable = PCH_ENABLE;
} else {
*enable = PCH_DISABLE;
enable = PCH_DISABLE;
}
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
return enable;
}
static int pch_can_int_pending(struct pch_can_priv *priv)
@ -453,15 +400,17 @@ static void pch_can_set_rx_buffer_link(struct pch_can_priv *priv,
unsigned long flags;
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, buffer_num);
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_CTRL, &priv->regs->if1_cmask);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, buffer_num);
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_CTRL,
&priv->regs->ifregs[0].cmask);
if (set == PCH_ENABLE)
pch_can_bit_clear(&priv->regs->if1_mcont, PCH_IF_MCONT_EOB);
pch_can_bit_clear(&priv->regs->ifregs[0].mcont,
PCH_IF_MCONT_EOB);
else
pch_can_bit_set(&priv->regs->if1_mcont, PCH_IF_MCONT_EOB);
pch_can_bit_set(&priv->regs->ifregs[0].mcont, PCH_IF_MCONT_EOB);
pch_can_check_if_busy(&priv->regs->if1_creq, buffer_num);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, buffer_num);
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
}
@ -471,10 +420,10 @@ static void pch_can_get_rx_buffer_link(struct pch_can_priv *priv,
unsigned long flags;
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, buffer_num);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, buffer_num);
if (ioread32(&priv->regs->if1_mcont) & PCH_IF_MCONT_EOB)
if (ioread32(&priv->regs->ifregs[0].mcont) & PCH_IF_MCONT_EOB)
*link = PCH_DISABLE;
else
*link = PCH_ENABLE;
@ -486,37 +435,37 @@ static void pch_can_clear_buffers(struct pch_can_priv *priv)
int i;
for (i = 0; i < PCH_RX_OBJ_NUM; i++) {
iowrite32(PCH_CMASK_RX_TX_SET, &priv->regs->if1_cmask);
iowrite32(0xffff, &priv->regs->if1_mask1);
iowrite32(0xffff, &priv->regs->if1_mask2);
iowrite32(0x0, &priv->regs->if1_id1);
iowrite32(0x0, &priv->regs->if1_id2);
iowrite32(0x0, &priv->regs->if1_mcont);
iowrite32(0x0, &priv->regs->if1_dataa1);
iowrite32(0x0, &priv->regs->if1_dataa2);
iowrite32(0x0, &priv->regs->if1_datab1);
iowrite32(0x0, &priv->regs->if1_datab2);
iowrite32(PCH_CMASK_RX_TX_SET, &priv->regs->ifregs[0].cmask);
iowrite32(0xffff, &priv->regs->ifregs[0].mask1);
iowrite32(0xffff, &priv->regs->ifregs[0].mask2);
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(PCH_CMASK_RDWR | PCH_CMASK_MASK |
PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, i+1);
&priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, i+1);
}
for (i = i; i < PCH_OBJ_NUM; i++) {
iowrite32(PCH_CMASK_RX_TX_SET, &priv->regs->if2_cmask);
iowrite32(0xffff, &priv->regs->if2_mask1);
iowrite32(0xffff, &priv->regs->if2_mask2);
iowrite32(0x0, &priv->regs->if2_id1);
iowrite32(0x0, &priv->regs->if2_id2);
iowrite32(0x0, &priv->regs->if2_mcont);
iowrite32(0x0, &priv->regs->if2_dataa1);
iowrite32(0x0, &priv->regs->if2_dataa2);
iowrite32(0x0, &priv->regs->if2_datab1);
iowrite32(0x0, &priv->regs->if2_datab2);
iowrite32(PCH_CMASK_RX_TX_SET, &priv->regs->ifregs[1].cmask);
iowrite32(0xffff, &priv->regs->ifregs[1].mask1);
iowrite32(0xffff, &priv->regs->ifregs[1].mask2);
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(PCH_CMASK_RDWR | PCH_CMASK_MASK |
PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->if2_cmask);
pch_can_check_if_busy(&priv->regs->if2_creq, i+1);
&priv->regs->ifregs[1].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq, i+1);
}
}
@ -530,58 +479,60 @@ static void pch_can_config_rx_tx_buffers(struct pch_can_priv *priv)
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_RX) {
iowrite32(PCH_CMASK_RX_TX_GET,
&priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, i+1);
&priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, i+1);
iowrite32(0x0, &priv->regs->if1_id1);
iowrite32(0x0, &priv->regs->if1_id2);
iowrite32(0x0, &priv->regs->ifregs[0].id1);
iowrite32(0x0, &priv->regs->ifregs[0].id2);
pch_can_bit_set(&priv->regs->if1_mcont,
pch_can_bit_set(&priv->regs->ifregs[0].mcont,
PCH_IF_MCONT_UMASK);
/* Set FIFO mode set to 0 except last Rx Obj*/
pch_can_bit_clear(&priv->regs->if1_mcont,
pch_can_bit_clear(&priv->regs->ifregs[0].mcont,
PCH_IF_MCONT_EOB);
/* In case FIFO mode, Last EoB of Rx Obj must be 1 */
if (i == (PCH_RX_OBJ_NUM - 1))
pch_can_bit_set(&priv->regs->if1_mcont,
pch_can_bit_set(&priv->regs->ifregs[0].mcont,
PCH_IF_MCONT_EOB);
iowrite32(0, &priv->regs->if1_mask1);
pch_can_bit_clear(&priv->regs->if1_mask2,
iowrite32(0, &priv->regs->ifregs[0].mask1);
pch_can_bit_clear(&priv->regs->ifregs[0].mask2,
0x1fff | PCH_MASK2_MDIR_MXTD);
/* Setting CMASK for writing */
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_MASK |
PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->if1_cmask);
&priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, i+1);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, i+1);
} else if (priv->msg_obj[i] == PCH_MSG_OBJ_TX) {
iowrite32(PCH_CMASK_RX_TX_GET,
&priv->regs->if2_cmask);
pch_can_check_if_busy(&priv->regs->if2_creq, i+1);
&priv->regs->ifregs[1].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq, i+1);
/* Resetting DIR bit for reception */
iowrite32(0x0, &priv->regs->if2_id1);
iowrite32(0x0, &priv->regs->if2_id2);
pch_can_bit_set(&priv->regs->if2_id2, PCH_ID2_DIR);
iowrite32(0x0, &priv->regs->ifregs[1].id1);
iowrite32(0x0, &priv->regs->ifregs[1].id2);
pch_can_bit_set(&priv->regs->ifregs[1].id2,
PCH_ID2_DIR);
/* Setting EOB bit for transmitter */
iowrite32(PCH_IF_MCONT_EOB, &priv->regs->if2_mcont);
iowrite32(PCH_IF_MCONT_EOB,
&priv->regs->ifregs[1].mcont);
pch_can_bit_set(&priv->regs->if2_mcont,
pch_can_bit_set(&priv->regs->ifregs[1].mcont,
PCH_IF_MCONT_UMASK);
iowrite32(0, &priv->regs->if2_mask1);
pch_can_bit_clear(&priv->regs->if2_mask2, 0x1fff);
iowrite32(0, &priv->regs->ifregs[1].mask1);
pch_can_bit_clear(&priv->regs->ifregs[1].mask2, 0x1fff);
/* Setting CMASK for writing */
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_MASK |
PCH_CMASK_ARB | PCH_CMASK_CTRL,
&priv->regs->if2_cmask);
&priv->regs->ifregs[1].cmask);
pch_can_check_if_busy(&priv->regs->if2_creq, i+1);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq, i+1);
}
}
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
@ -611,10 +562,10 @@ static void pch_can_release(struct pch_can_priv *priv)
pch_can_set_int_enables(priv, PCH_CAN_NONE);
/* Disabling all the receive object. */
pch_can_rx_disable_all(priv);
pch_can_set_rx_all(priv, 0);
/* Disabling all the transmit object. */
pch_can_tx_disable_all(priv);
pch_can_set_tx_all(priv, 0);
}
/* This function clears interrupt(s) from the CAN device. */
@ -630,31 +581,31 @@ static void pch_can_int_clr(struct pch_can_priv *priv, u32 mask)
/* Setting CMASK for clearing interrupts for
frame transmission. */
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_CTRL | PCH_CMASK_ARB,
&priv->regs->if2_cmask);
&priv->regs->ifregs[1].cmask);
/* Resetting the ID registers. */
pch_can_bit_set(&priv->regs->if2_id2,
pch_can_bit_set(&priv->regs->ifregs[1].id2,
PCH_ID2_DIR | (0x7ff << 2));
iowrite32(0x0, &priv->regs->if2_id1);
iowrite32(0x0, &priv->regs->ifregs[1].id1);
/* Claring NewDat, TxRqst & IntPnd */
pch_can_bit_clear(&priv->regs->if2_mcont,
pch_can_bit_clear(&priv->regs->ifregs[1].mcont,
PCH_IF_MCONT_NEWDAT | PCH_IF_MCONT_INTPND |
PCH_IF_MCONT_TXRQXT);
pch_can_check_if_busy(&priv->regs->if2_creq, mask);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq, mask);
} else if (priv->msg_obj[mask - 1] == PCH_MSG_OBJ_RX) {
/* Setting CMASK for clearing the reception interrupts. */
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_CTRL | PCH_CMASK_ARB,
&priv->regs->if1_cmask);
&priv->regs->ifregs[0].cmask);
/* Clearing the Dir bit. */
pch_can_bit_clear(&priv->regs->if1_id2, PCH_ID2_DIR);
pch_can_bit_clear(&priv->regs->ifregs[0].id2, PCH_ID2_DIR);
/* Clearing NewDat & IntPnd */
pch_can_bit_clear(&priv->regs->if1_mcont,
pch_can_bit_clear(&priv->regs->ifregs[0].mcont,
PCH_IF_MCONT_NEWDAT | PCH_IF_MCONT_INTPND);
pch_can_check_if_busy(&priv->regs->if1_creq, mask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, mask);
}
}
@ -685,8 +636,8 @@ static void pch_can_error(struct net_device *ndev, u32 status)
return;
if (status & PCH_BUS_OFF) {
pch_can_tx_disable_all(priv);
pch_can_rx_disable_all(priv);
pch_can_set_tx_all(priv, 0);
pch_can_set_rx_all(priv, 0);
state = CAN_STATE_BUS_OFF;
cf->can_id |= CAN_ERR_BUSOFF;
can_bus_off(ndev);
@ -783,22 +734,22 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 int_stat)
struct net_device_stats *stats = &(priv->ndev->stats);
/* Reading the messsage object from the Message RAM */
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, int_stat);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, int_stat);
/* Reading the MCONT register. */
reg = ioread32(&priv->regs->if1_mcont);
reg = ioread32(&priv->regs->ifregs[0].mcont);
reg &= 0xffff;
for (k = int_stat; !(reg & PCH_IF_MCONT_EOB); k++) {
/* If MsgLost bit set. */
if (reg & PCH_IF_MCONT_MSGLOST) {
dev_err(&priv->ndev->dev, "Msg Obj is overwritten.\n");
pch_can_bit_clear(&priv->regs->if1_mcont,
pch_can_bit_clear(&priv->regs->ifregs[0].mcont,
PCH_IF_MCONT_MSGLOST);
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_CTRL,
&priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, k);
&priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, k);
skb = alloc_can_err_skb(ndev, &cf);
if (!skb)
@ -824,29 +775,30 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 int_stat)
return -ENOMEM;
/* Get Received data */
ide = ((ioread32(&priv->regs->if1_id2)) & PCH_ID2_XTD) >> 14;
ide = ((ioread32(&priv->regs->ifregs[0].id2)) & PCH_ID2_XTD) >>
14;
if (ide) {
id = (ioread32(&priv->regs->if1_id1) & 0xffff);
id |= (((ioread32(&priv->regs->if1_id2)) &
id = (ioread32(&priv->regs->ifregs[0].id1) & 0xffff);
id |= (((ioread32(&priv->regs->ifregs[0].id2)) &
0x1fff) << 16);
cf->can_id = (id & CAN_EFF_MASK) | CAN_EFF_FLAG;
} else {
id = (((ioread32(&priv->regs->if1_id2)) &
(CAN_SFF_MASK << 2)) >> 2);
id = (((ioread32(&priv->regs->ifregs[0].id2)) &
(CAN_SFF_MASK << 2)) >> 2);
cf->can_id = (id & CAN_SFF_MASK);
}
rtr = (ioread32(&priv->regs->if1_id2) & PCH_ID2_DIR);
rtr = (ioread32(&priv->regs->ifregs[0].id2) & PCH_ID2_DIR);
if (rtr) {
cf->can_dlc = 0;
cf->can_id |= CAN_RTR_FLAG;
} else {
cf->can_dlc = ((ioread32(&priv->regs->if1_mcont)) &
0x0f);
cf->can_dlc = ((ioread32(&priv->regs->ifregs[0].mcont))
& 0x0f);
}
for (i = 0, j = 0; i < cf->can_dlc; j++) {
reg = ioread32(&priv->regs->if1_dataa1 + j*4);
reg = ioread32(&priv->regs->ifregs[0].dataa1 + j*4);
cf->data[i++] = cpu_to_le32(reg & 0xff);
if (i == cf->can_dlc)
break;
@ -860,15 +812,16 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 int_stat)
if (k < PCH_FIFO_THRESH) {
iowrite32(PCH_CMASK_RDWR | PCH_CMASK_CTRL |
PCH_CMASK_ARB, &priv->regs->if1_cmask);
PCH_CMASK_ARB, &priv->regs->ifregs[0].cmask);
/* Clearing the Dir bit. */
pch_can_bit_clear(&priv->regs->if1_id2, PCH_ID2_DIR);
pch_can_bit_clear(&priv->regs->ifregs[0].id2,
PCH_ID2_DIR);
/* Clearing NewDat & IntPnd */
pch_can_bit_clear(&priv->regs->if1_mcont,
pch_can_bit_clear(&priv->regs->ifregs[0].mcont,
PCH_IF_MCONT_INTPND);
pch_can_check_if_busy(&priv->regs->if1_creq, k);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, k);
} else if (k > PCH_FIFO_THRESH) {
pch_can_int_clr(priv, k);
} else if (k == PCH_FIFO_THRESH) {
@ -878,9 +831,9 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 int_stat)
}
RX_NEXT:
/* Reading the messsage object from the Message RAM */
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if1_cmask);
pch_can_check_if_busy(&priv->regs->if1_creq, k + 1);
reg = ioread32(&priv->regs->if1_mcont);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[0].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[0].creq, k + 1);
reg = ioread32(&priv->regs->ifregs[0].mcont);
}
return rcv_pkts;
@ -910,8 +863,9 @@ INT_STAT:
if (reg_stat & PCH_TX_OK) {
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if2_cmask);
pch_can_check_if_busy(&priv->regs->if2_creq,
iowrite32(PCH_CMASK_RX_TX_GET,
&priv->regs->ifregs[1].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq,
ioread32(&priv->regs->intr));
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
pch_can_bit_clear(&priv->regs->stat, PCH_TX_OK);
@ -938,10 +892,11 @@ MSG_OBJ:
can_get_echo_skb(ndev, int_stat - PCH_RX_OBJ_NUM - 1);
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
iowrite32(PCH_CMASK_RX_TX_GET | PCH_CMASK_CLRINTPND,
&priv->regs->if2_cmask);
dlc = ioread32(&priv->regs->if2_mcont) &
&priv->regs->ifregs[1].cmask);
dlc = ioread32(&priv->regs->ifregs[1].mcont) &
PCH_IF_MCONT_DLC;
pch_can_check_if_busy(&priv->regs->if2_creq, int_stat);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq,
int_stat);
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
if (dlc > 8)
dlc = 8;
@ -996,8 +951,8 @@ static void pch_can_start(struct net_device *ndev)
pch_set_bittiming(ndev);
pch_can_set_optmode(priv);
pch_can_tx_enable_all(priv);
pch_can_rx_enable_all(priv);
pch_can_set_tx_all(priv, 1);
pch_can_set_rx_all(priv, 1);
/* Setting the CAN to run mode. */
pch_can_set_run_mode(priv, PCH_CAN_RUN);
@ -1125,54 +1080,55 @@ static netdev_tx_t pch_xmit(struct sk_buff *skb, struct net_device *ndev)
spin_lock_irqsave(&priv->msgif_reg_lock, flags);
/* Reading the Msg Obj from the Msg RAM to the Interface register. */
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->if2_cmask);
pch_can_check_if_busy(&priv->regs->if2_creq, tx_buffer_avail);
iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[1].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq, tx_buffer_avail);
/* Setting the CMASK register. */
pch_can_bit_set(&priv->regs->if2_cmask, PCH_CMASK_ALL);
pch_can_bit_set(&priv->regs->ifregs[1].cmask, PCH_CMASK_ALL);
/* If ID extended is set. */
pch_can_bit_clear(&priv->regs->if2_id1, 0xffff);
pch_can_bit_clear(&priv->regs->if2_id2, 0x1fff | PCH_ID2_XTD);
pch_can_bit_clear(&priv->regs->ifregs[1].id1, 0xffff);
pch_can_bit_clear(&priv->regs->ifregs[1].id2, 0x1fff | PCH_ID2_XTD);
if (cf->can_id & CAN_EFF_FLAG) {
pch_can_bit_set(&priv->regs->if2_id1, cf->can_id & 0xffff);
pch_can_bit_set(&priv->regs->if2_id2,
pch_can_bit_set(&priv->regs->ifregs[1].id1,
cf->can_id & 0xffff);
pch_can_bit_set(&priv->regs->ifregs[1].id2,
((cf->can_id >> 16) & 0x1fff) | PCH_ID2_XTD);
} else {
pch_can_bit_set(&priv->regs->if2_id1, 0);
pch_can_bit_set(&priv->regs->if2_id2,
pch_can_bit_set(&priv->regs->ifregs[1].id1, 0);
pch_can_bit_set(&priv->regs->ifregs[1].id2,
(cf->can_id & CAN_SFF_MASK) << 2);
}
/* If remote frame has to be transmitted.. */
if (cf->can_id & CAN_RTR_FLAG)
pch_can_bit_clear(&priv->regs->if2_id2, PCH_ID2_DIR);
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->if2_dataa1) + j*4);
(&priv->regs->ifregs[1].dataa1) + j*4);
if (i == cf->can_dlc)
break;
iowrite32(le32_to_cpu(cf->data[i++] << 8),
(&priv->regs->if2_dataa1) + j*4);
(&priv->regs->ifregs[1].dataa1) + j*4);
}
can_put_echo_skb(skb, ndev, tx_buffer_avail - PCH_RX_OBJ_NUM - 1);
/* Updating the size of the data. */
pch_can_bit_clear(&priv->regs->if2_mcont, 0x0f);
pch_can_bit_set(&priv->regs->if2_mcont, cf->can_dlc);
pch_can_bit_clear(&priv->regs->ifregs[1].mcont, 0x0f);
pch_can_bit_set(&priv->regs->ifregs[1].mcont, cf->can_dlc);
/* Clearing IntPend, NewDat & TxRqst */
pch_can_bit_clear(&priv->regs->if2_mcont,
pch_can_bit_clear(&priv->regs->ifregs[1].mcont,
PCH_IF_MCONT_NEWDAT | PCH_IF_MCONT_INTPND |
PCH_IF_MCONT_TXRQXT);
/* Setting NewDat, TxRqst bits */
pch_can_bit_set(&priv->regs->if2_mcont,
pch_can_bit_set(&priv->regs->ifregs[1].mcont,
PCH_IF_MCONT_NEWDAT | PCH_IF_MCONT_TXRQXT);
pch_can_check_if_busy(&priv->regs->if2_creq, tx_buffer_avail);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq, tx_buffer_avail);
spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
@ -1234,25 +1190,25 @@ static int pch_can_suspend(struct pci_dev *pdev, pm_message_t state)
/* Save Tx buffer enable state */
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_TX)
pch_can_get_tx_enable(priv, i + 1,
&(priv->tx_enable[i]));
priv->tx_enable[i] = pch_can_get_rxtx_ir(priv, i + 1,
PCH_TX_IFREG);
}
/* Disable all Transmit buffers */
pch_can_tx_disable_all(priv);
pch_can_set_tx_all(priv, 0);
/* Save Rx buffer enable state */
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_RX) {
pch_can_get_rx_enable(priv, i + 1,
&(priv->rx_enable[i]));
priv->rx_enable[i] = pch_can_get_rxtx_ir(priv, i + 1,
PCH_RX_IFREG);
pch_can_get_rx_buffer_link(priv, i + 1,
&(priv->rx_link[i]));
}
}
/* Disable all Receive buffers */
pch_can_rx_disable_all(priv);
pch_can_set_rx_all(priv, 0);
retval = pci_save_state(pdev);
if (retval) {
dev_err(&pdev->dev, "pci_save_state failed.\n");
@ -1301,10 +1257,9 @@ static int pch_can_resume(struct pci_dev *pdev)
/* Enabling the transmit buffer. */
for (i = 0; i < PCH_OBJ_NUM; i++) {
if (priv->msg_obj[i] == PCH_MSG_OBJ_TX) {
pch_can_set_tx_enable(priv, i + 1,
priv->tx_enable[i]);
}
if (priv->msg_obj[i] == PCH_MSG_OBJ_TX)
pch_can_set_rxtx(priv, i, priv->tx_enable[i],
PCH_TX_IFREG);
}
/* Configuring the receive buffer and enabling them. */
@ -1315,7 +1270,9 @@ static int pch_can_resume(struct pci_dev *pdev)
priv->rx_link[i]);
/* Restore buffer enables */
pch_can_set_rx_enable(priv, i + 1, priv->rx_enable[i]);
pch_can_set_rxtx(priv, i, priv->rx_enable[i],
PCH_RX_IFREG);
}
}