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path: root/drivers/net/can
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-rw-r--r--drivers/net/can/at91_can.c4
-rw-r--r--drivers/net/can/bfin_can.c4
-rw-r--r--drivers/net/can/dev.c8
-rw-r--r--drivers/net/can/mcp251x.c426
-rw-r--r--drivers/net/can/mscan/Kconfig7
-rw-r--r--drivers/net/can/mscan/mpc5xxx_can.c248
-rw-r--r--drivers/net/can/mscan/mscan.c58
-rw-r--r--drivers/net/can/mscan/mscan.h86
-rw-r--r--drivers/net/can/sja1000/Kconfig12
-rw-r--r--drivers/net/can/sja1000/Makefile1
-rw-r--r--drivers/net/can/sja1000/ems_pci.c2
-rw-r--r--drivers/net/can/sja1000/kvaser_pci.c2
-rw-r--r--drivers/net/can/sja1000/plx_pci.c472
-rw-r--r--drivers/net/can/sja1000/sja1000.c27
-rw-r--r--drivers/net/can/ti_hecc.c73
-rw-r--r--drivers/net/can/usb/Kconfig2
-rw-r--r--drivers/net/can/usb/ems_usb.c6
-rw-r--r--drivers/net/can/vcan.c12
18 files changed, 1118 insertions, 332 deletions
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 166cc7e579c0..a2f29a38798a 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -342,6 +342,9 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
unsigned int mb, prio;
u32 reg_mid, reg_mcr;
+ if (can_dropped_invalid_skb(dev, skb))
+ return NETDEV_TX_OK;
+
mb = get_tx_next_mb(priv);
prio = get_tx_next_prio(priv);
@@ -1070,6 +1073,7 @@ static int __init at91_can_probe(struct platform_device *pdev)
priv->can.bittiming_const = &at91_bittiming_const;
priv->can.do_set_bittiming = at91_set_bittiming;
priv->can.do_set_mode = at91_set_mode;
+ priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
priv->reg_base = addr;
priv->dev = dev;
priv->clk = clk;
diff --git a/drivers/net/can/bfin_can.c b/drivers/net/can/bfin_can.c
index 0ec1524523cc..bf7f9ba2d903 100644
--- a/drivers/net/can/bfin_can.c
+++ b/drivers/net/can/bfin_can.c
@@ -318,6 +318,9 @@ static int bfin_can_start_xmit(struct sk_buff *skb, struct net_device *dev)
u16 val;
int i;
+ if (can_dropped_invalid_skb(dev, skb))
+ return NETDEV_TX_OK;
+
netif_stop_queue(dev);
/* fill id */
@@ -600,6 +603,7 @@ struct net_device *alloc_bfin_candev(void)
priv->can.bittiming_const = &bfin_can_bittiming_const;
priv->can.do_set_bittiming = bfin_can_set_bittiming;
priv->can.do_set_mode = bfin_can_set_mode;
+ priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
return dev;
}
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index c1bb29f0322b..904aa369f80e 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -574,6 +574,7 @@ static const struct nla_policy can_policy[IFLA_CAN_MAX + 1] = {
[IFLA_CAN_BITTIMING_CONST]
= { .len = sizeof(struct can_bittiming_const) },
[IFLA_CAN_CLOCK] = { .len = sizeof(struct can_clock) },
+ [IFLA_CAN_BERR_COUNTER] = { .len = sizeof(struct can_berr_counter) },
};
static int can_changelink(struct net_device *dev,
@@ -592,6 +593,8 @@ static int can_changelink(struct net_device *dev,
if (dev->flags & IFF_UP)
return -EBUSY;
cm = nla_data(data[IFLA_CAN_CTRLMODE]);
+ if (cm->flags & ~priv->ctrlmode_supported)
+ return -EOPNOTSUPP;
priv->ctrlmode &= ~cm->mask;
priv->ctrlmode |= cm->flags;
}
@@ -647,6 +650,8 @@ static size_t can_get_size(const struct net_device *dev)
size += nla_total_size(sizeof(u32)); /* IFLA_CAN_RESTART_MS */
size += sizeof(struct can_bittiming); /* IFLA_CAN_BITTIMING */
size += sizeof(struct can_clock); /* IFLA_CAN_CLOCK */
+ if (priv->do_get_berr_counter) /* IFLA_CAN_BERR_COUNTER */
+ size += sizeof(struct can_berr_counter);
if (priv->bittiming_const) /* IFLA_CAN_BITTIMING_CONST */
size += sizeof(struct can_bittiming_const);
@@ -657,6 +662,7 @@ static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
struct can_priv *priv = netdev_priv(dev);
struct can_ctrlmode cm = {.flags = priv->ctrlmode};
+ struct can_berr_counter bec;
enum can_state state = priv->state;
if (priv->do_get_state)
@@ -667,6 +673,8 @@ static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
NLA_PUT(skb, IFLA_CAN_BITTIMING,
sizeof(priv->bittiming), &priv->bittiming);
NLA_PUT(skb, IFLA_CAN_CLOCK, sizeof(cm), &priv->clock);
+ if (priv->do_get_berr_counter && !priv->do_get_berr_counter(dev, &bec))
+ NLA_PUT(skb, IFLA_CAN_BERR_COUNTER, sizeof(bec), &bec);
if (priv->bittiming_const)
NLA_PUT(skb, IFLA_CAN_BITTIMING_CONST,
sizeof(*priv->bittiming_const), priv->bittiming_const);
diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c
index 1a72ca066a17..f8cc168ec76c 100644
--- a/drivers/net/can/mcp251x.c
+++ b/drivers/net/can/mcp251x.c
@@ -180,6 +180,14 @@
#define RXBEID0_OFF 4
#define RXBDLC_OFF 5
#define RXBDAT_OFF 6
+#define RXFSIDH(n) ((n) * 4)
+#define RXFSIDL(n) ((n) * 4 + 1)
+#define RXFEID8(n) ((n) * 4 + 2)
+#define RXFEID0(n) ((n) * 4 + 3)
+#define RXMSIDH(n) ((n) * 4 + 0x20)
+#define RXMSIDL(n) ((n) * 4 + 0x21)
+#define RXMEID8(n) ((n) * 4 + 0x22)
+#define RXMEID0(n) ((n) * 4 + 0x23)
#define GET_BYTE(val, byte) \
(((val) >> ((byte) * 8)) & 0xff)
@@ -219,7 +227,8 @@ struct mcp251x_priv {
struct net_device *net;
struct spi_device *spi;
- struct mutex spi_lock; /* SPI buffer lock */
+ struct mutex mcp_lock; /* SPI device lock */
+
u8 *spi_tx_buf;
u8 *spi_rx_buf;
dma_addr_t spi_tx_dma;
@@ -227,11 +236,11 @@ struct mcp251x_priv {
struct sk_buff *tx_skb;
int tx_len;
+
struct workqueue_struct *wq;
struct work_struct tx_work;
- struct work_struct irq_work;
- struct completion awake;
- int wake;
+ struct work_struct restart_work;
+
int force_quit;
int after_suspend;
#define AFTER_SUSPEND_UP 1
@@ -245,7 +254,8 @@ static void mcp251x_clean(struct net_device *net)
{
struct mcp251x_priv *priv = netdev_priv(net);
- net->stats.tx_errors++;
+ if (priv->tx_skb || priv->tx_len)
+ net->stats.tx_errors++;
if (priv->tx_skb)
dev_kfree_skb(priv->tx_skb);
if (priv->tx_len)
@@ -300,16 +310,12 @@ static u8 mcp251x_read_reg(struct spi_device *spi, uint8_t reg)
struct mcp251x_priv *priv = dev_get_drvdata(&spi->dev);
u8 val = 0;
- mutex_lock(&priv->spi_lock);
-
priv->spi_tx_buf[0] = INSTRUCTION_READ;
priv->spi_tx_buf[1] = reg;
mcp251x_spi_trans(spi, 3);
val = priv->spi_rx_buf[2];
- mutex_unlock(&priv->spi_lock);
-
return val;
}
@@ -317,15 +323,11 @@ static void mcp251x_write_reg(struct spi_device *spi, u8 reg, uint8_t val)
{
struct mcp251x_priv *priv = dev_get_drvdata(&spi->dev);
- mutex_lock(&priv->spi_lock);
-
priv->spi_tx_buf[0] = INSTRUCTION_WRITE;
priv->spi_tx_buf[1] = reg;
priv->spi_tx_buf[2] = val;
mcp251x_spi_trans(spi, 3);
-
- mutex_unlock(&priv->spi_lock);
}
static void mcp251x_write_bits(struct spi_device *spi, u8 reg,
@@ -333,16 +335,12 @@ static void mcp251x_write_bits(struct spi_device *spi, u8 reg,
{
struct mcp251x_priv *priv = dev_get_drvdata(&spi->dev);
- mutex_lock(&priv->spi_lock);
-
priv->spi_tx_buf[0] = INSTRUCTION_BIT_MODIFY;
priv->spi_tx_buf[1] = reg;
priv->spi_tx_buf[2] = mask;
priv->spi_tx_buf[3] = val;
mcp251x_spi_trans(spi, 4);
-
- mutex_unlock(&priv->spi_lock);
}
static void mcp251x_hw_tx_frame(struct spi_device *spi, u8 *buf,
@@ -358,10 +356,8 @@ static void mcp251x_hw_tx_frame(struct spi_device *spi, u8 *buf,
mcp251x_write_reg(spi, TXBCTRL(tx_buf_idx) + i,
buf[i]);
} else {
- mutex_lock(&priv->spi_lock);
memcpy(priv->spi_tx_buf, buf, TXBDAT_OFF + len);
mcp251x_spi_trans(spi, TXBDAT_OFF + len);
- mutex_unlock(&priv->spi_lock);
}
}
@@ -408,13 +404,9 @@ static void mcp251x_hw_rx_frame(struct spi_device *spi, u8 *buf,
for (; i < (RXBDAT_OFF + len); i++)
buf[i] = mcp251x_read_reg(spi, RXBCTRL(buf_idx) + i);
} else {
- mutex_lock(&priv->spi_lock);
-
priv->spi_tx_buf[RXBCTRL_OFF] = INSTRUCTION_READ_RXB(buf_idx);
mcp251x_spi_trans(spi, SPI_TRANSFER_BUF_LEN);
memcpy(buf, priv->spi_rx_buf, SPI_TRANSFER_BUF_LEN);
-
- mutex_unlock(&priv->spi_lock);
}
}
@@ -467,21 +459,6 @@ static void mcp251x_hw_sleep(struct spi_device *spi)
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_SLEEP);
}
-static void mcp251x_hw_wakeup(struct spi_device *spi)
-{
- struct mcp251x_priv *priv = dev_get_drvdata(&spi->dev);
-
- priv->wake = 1;
-
- /* Can only wake up by generating a wake-up interrupt. */
- mcp251x_write_bits(spi, CANINTE, CANINTE_WAKIE, CANINTE_WAKIE);
- mcp251x_write_bits(spi, CANINTF, CANINTF_WAKIF, CANINTF_WAKIF);
-
- /* Wait until the device is awake */
- if (!wait_for_completion_timeout(&priv->awake, HZ))
- dev_err(&spi->dev, "MCP251x didn't wake-up\n");
-}
-
static netdev_tx_t mcp251x_hard_start_xmit(struct sk_buff *skb,
struct net_device *net)
{
@@ -490,16 +467,11 @@ static netdev_tx_t mcp251x_hard_start_xmit(struct sk_buff *skb,
if (priv->tx_skb || priv->tx_len) {
dev_warn(&spi->dev, "hard_xmit called while tx busy\n");
- netif_stop_queue(net);
return NETDEV_TX_BUSY;
}
- if (skb->len != sizeof(struct can_frame)) {
- dev_err(&spi->dev, "dropping packet - bad length\n");
- dev_kfree_skb(skb);
- net->stats.tx_dropped++;
+ if (can_dropped_invalid_skb(net, skb))
return NETDEV_TX_OK;
- }
netif_stop_queue(net);
priv->tx_skb = skb;
@@ -515,12 +487,13 @@ static int mcp251x_do_set_mode(struct net_device *net, enum can_mode mode)
switch (mode) {
case CAN_MODE_START:
+ mcp251x_clean(net);
/* We have to delay work since SPI I/O may sleep */
priv->can.state = CAN_STATE_ERROR_ACTIVE;
priv->restart_tx = 1;
if (priv->can.restart_ms == 0)
priv->after_suspend = AFTER_SUSPEND_RESTART;
- queue_work(priv->wq, &priv->irq_work);
+ queue_work(priv->wq, &priv->restart_work);
break;
default:
return -EOPNOTSUPP;
@@ -529,7 +502,7 @@ static int mcp251x_do_set_mode(struct net_device *net, enum can_mode mode)
return 0;
}
-static void mcp251x_set_normal_mode(struct spi_device *spi)
+static int mcp251x_set_normal_mode(struct spi_device *spi)
{
struct mcp251x_priv *priv = dev_get_drvdata(&spi->dev);
unsigned long timeout;
@@ -537,12 +510,14 @@ static void mcp251x_set_normal_mode(struct spi_device *spi)
/* Enable interrupts */
mcp251x_write_reg(spi, CANINTE,
CANINTE_ERRIE | CANINTE_TX2IE | CANINTE_TX1IE |
- CANINTE_TX0IE | CANINTE_RX1IE | CANINTE_RX0IE |
- CANINTF_MERRF);
+ CANINTE_TX0IE | CANINTE_RX1IE | CANINTE_RX0IE);
if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) {
/* Put device into loopback mode */
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LOOPBACK);
+ } else if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) {
+ /* Put device into listen-only mode */
+ mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LISTEN_ONLY);
} else {
/* Put device into normal mode */
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_NORMAL);
@@ -554,11 +529,12 @@ static void mcp251x_set_normal_mode(struct spi_device *spi)
if (time_after(jiffies, timeout)) {
dev_err(&spi->dev, "MCP251x didn't"
" enter in normal mode\n");
- return;
+ return -EBUSY;
}
}
}
priv->can.state = CAN_STATE_ERROR_ACTIVE;
+ return 0;
}
static int mcp251x_do_set_bittiming(struct net_device *net)
@@ -589,33 +565,39 @@ static int mcp251x_setup(struct net_device *net, struct mcp251x_priv *priv,
{
mcp251x_do_set_bittiming(net);
- /* Enable RX0->RX1 buffer roll over and disable filters */
- mcp251x_write_bits(spi, RXBCTRL(0),
- RXBCTRL_BUKT | RXBCTRL_RXM0 | RXBCTRL_RXM1,
- RXBCTRL_BUKT | RXBCTRL_RXM0 | RXBCTRL_RXM1);
- mcp251x_write_bits(spi, RXBCTRL(1),
- RXBCTRL_RXM0 | RXBCTRL_RXM1,
- RXBCTRL_RXM0 | RXBCTRL_RXM1);
+ mcp251x_write_reg(spi, RXBCTRL(0),
+ RXBCTRL_BUKT | RXBCTRL_RXM0 | RXBCTRL_RXM1);
+ mcp251x_write_reg(spi, RXBCTRL(1),
+ RXBCTRL_RXM0 | RXBCTRL_RXM1);
return 0;
}
-static void mcp251x_hw_reset(struct spi_device *spi)
+static int mcp251x_hw_reset(struct spi_device *spi)
{
struct mcp251x_priv *priv = dev_get_drvdata(&spi->dev);
int ret;
-
- mutex_lock(&priv->spi_lock);
+ unsigned long timeout;
priv->spi_tx_buf[0] = INSTRUCTION_RESET;
-
ret = spi_write(spi, priv->spi_tx_buf, 1);
-
- mutex_unlock(&priv->spi_lock);
-
- if (ret)
+ if (ret) {
dev_err(&spi->dev, "reset failed: ret = %d\n", ret);
+ return -EIO;
+ }
+
/* Wait for reset to finish */
+ timeout = jiffies + HZ;
mdelay(10);
+ while ((mcp251x_read_reg(spi, CANSTAT) & CANCTRL_REQOP_MASK)
+ != CANCTRL_REQOP_CONF) {
+ schedule();
+ if (time_after(jiffies, timeout)) {
+ dev_err(&spi->dev, "MCP251x didn't"
+ " enter in conf mode after reset\n");
+ return -EBUSY;
+ }
+ }
+ return 0;
}
static int mcp251x_hw_probe(struct spi_device *spi)
@@ -639,63 +621,17 @@ static int mcp251x_hw_probe(struct spi_device *spi)
return (st1 == 0x80 && st2 == 0x07) ? 1 : 0;
}
-static irqreturn_t mcp251x_can_isr(int irq, void *dev_id)
-{
- struct net_device *net = (struct net_device *)dev_id;
- struct mcp251x_priv *priv = netdev_priv(net);
-
- /* Schedule bottom half */
- if (!work_pending(&priv->irq_work))
- queue_work(priv->wq, &priv->irq_work);
-
- return IRQ_HANDLED;
-}
-
-static int mcp251x_open(struct net_device *net)
+static void mcp251x_open_clean(struct net_device *net)
{
struct mcp251x_priv *priv = netdev_priv(net);
struct spi_device *spi = priv->spi;
struct mcp251x_platform_data *pdata = spi->dev.platform_data;
- int ret;
-
- ret = open_candev(net);
- if (ret) {
- dev_err(&spi->dev, "unable to set initial baudrate!\n");
- return ret;
- }
+ free_irq(spi->irq, priv);
+ mcp251x_hw_sleep(spi);
if (pdata->transceiver_enable)
- pdata->transceiver_enable(1);
-
- priv->force_quit = 0;
- priv->tx_skb = NULL;
- priv->tx_len = 0;
-
- ret = request_irq(spi->irq, mcp251x_can_isr,
- IRQF_TRIGGER_FALLING, DEVICE_NAME, net);
- if (ret) {
- dev_err(&spi->dev, "failed to acquire irq %d\n", spi->irq);
- if (pdata->transceiver_enable)
- pdata->transceiver_enable(0);
- close_candev(net);
- return ret;
- }
-
- mcp251x_hw_wakeup(spi);
- mcp251x_hw_reset(spi);
- ret = mcp251x_setup(net, priv, spi);
- if (ret) {
- free_irq(spi->irq, net);
- mcp251x_hw_sleep(spi);
- if (pdata->transceiver_enable)
- pdata->transceiver_enable(0);
- close_candev(net);
- return ret;
- }
- mcp251x_set_normal_mode(spi);
- netif_wake_queue(net);
-
- return 0;
+ pdata->transceiver_enable(0);
+ close_candev(net);
}
static int mcp251x_stop(struct net_device *net)
@@ -706,17 +642,19 @@ static int mcp251x_stop(struct net_device *net)
close_candev(net);
+ priv->force_quit = 1;
+ free_irq(spi->irq, priv);
+ destroy_workqueue(priv->wq);
+ priv->wq = NULL;
+
+ mutex_lock(&priv->mcp_lock);
+
/* Disable and clear pending interrupts */
mcp251x_write_reg(spi, CANINTE, 0x00);
mcp251x_write_reg(spi, CANINTF, 0x00);
- priv->force_quit = 1;
- free_irq(spi->irq, net);
- flush_workqueue(priv->wq);
-
mcp251x_write_reg(spi, TXBCTRL(0), 0);
- if (priv->tx_skb || priv->tx_len)
- mcp251x_clean(net);
+ mcp251x_clean(net);
mcp251x_hw_sleep(spi);
@@ -725,9 +663,27 @@ static int mcp251x_stop(struct net_device *net)
priv->can.state = CAN_STATE_STOPPED;
+ mutex_unlock(&priv->mcp_lock);
+
return 0;
}
+static void mcp251x_error_skb(struct net_device *net, int can_id, int data1)
+{
+ struct sk_buff *skb;
+ struct can_frame *frame;
+
+ skb = alloc_can_err_skb(net, &frame);
+ if (skb) {
+ frame->can_id = can_id;
+ frame->data[1] = data1;
+ netif_rx(skb);
+ } else {
+ dev_err(&net->dev,
+ "cannot allocate error skb\n");
+ }
+}
+
static void mcp251x_tx_work_handler(struct work_struct *ws)
{
struct mcp251x_priv *priv = container_of(ws, struct mcp251x_priv,
@@ -736,33 +692,32 @@ static void mcp251x_tx_work_handler(struct work_struct *ws)
struct net_device *net = priv->net;
struct can_frame *frame;
+ mutex_lock(&priv->mcp_lock);
if (priv->tx_skb) {
- frame = (struct can_frame *)priv->tx_skb->data;
-
if (priv->can.state == CAN_STATE_BUS_OFF) {
mcp251x_clean(net);
- netif_wake_queue(net);
- return;
+ } else {
+ frame = (struct can_frame *)priv->tx_skb->data;
+
+ if (frame->can_dlc > CAN_FRAME_MAX_DATA_LEN)
+ frame->can_dlc = CAN_FRAME_MAX_DATA_LEN;
+ mcp251x_hw_tx(spi, frame, 0);
+ priv->tx_len = 1 + frame->can_dlc;
+ can_put_echo_skb(priv->tx_skb, net, 0);
+ priv->tx_skb = NULL;
}
- if (frame->can_dlc > CAN_FRAME_MAX_DATA_LEN)
- frame->can_dlc = CAN_FRAME_MAX_DATA_LEN;
- mcp251x_hw_tx(spi, frame, 0);
- priv->tx_len = 1 + frame->can_dlc;
- can_put_echo_skb(priv->tx_skb, net, 0);
- priv->tx_skb = NULL;
}
+ mutex_unlock(&priv->mcp_lock);
}
-static void mcp251x_irq_work_handler(struct work_struct *ws)
+static void mcp251x_restart_work_handler(struct work_struct *ws)
{
struct mcp251x_priv *priv = container_of(ws, struct mcp251x_priv,
- irq_work);
+ restart_work);
struct spi_device *spi = priv->spi;
struct net_device *net = priv->net;
- u8 txbnctrl;
- u8 intf;
- enum can_state new_state;
+ mutex_lock(&priv->mcp_lock);
if (priv->after_suspend) {
mdelay(10);
mcp251x_hw_reset(spi);
@@ -771,45 +726,54 @@ static void mcp251x_irq_work_handler(struct work_struct *ws)
mcp251x_set_normal_mode(spi);
} else if (priv->after_suspend & AFTER_SUSPEND_UP) {
netif_device_attach(net);
- /* Clean since we lost tx buffer */
- if (priv->tx_skb || priv->tx_len) {
- mcp251x_clean(net);
- netif_wake_queue(net);
- }
+ mcp251x_clean(net);
mcp251x_set_normal_mode(spi);
+ netif_wake_queue(net);
} else {
mcp251x_hw_sleep(spi);
}
priv->after_suspend = 0;
+ priv->force_quit = 0;
}
- if (priv->can.restart_ms == 0 && priv->can.state == CAN_STATE_BUS_OFF)
- return;
+ if (priv->restart_tx) {
+ priv->restart_tx = 0;
+ mcp251x_write_reg(spi, TXBCTRL(0), 0);
+ mcp251x_clean(net);
+ netif_wake_queue(net);
+ mcp251x_error_skb(net, CAN_ERR_RESTARTED, 0);
+ }
+ mutex_unlock(&priv->mcp_lock);
+}
- while (!priv->force_quit && !freezing(current)) {
- u8 eflag = mcp251x_read_reg(spi, EFLG);
- int can_id = 0, data1 = 0;
+static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
+{
+ struct mcp251x_priv *priv = dev_id;
+ struct spi_device *spi = priv->spi;
+ struct net_device *net = priv->net;
- mcp251x_write_reg(spi, EFLG, 0x00);
+ mutex_lock(&priv->mcp_lock);
+ while (!priv->force_quit) {
+ enum can_state new_state;
+ u8 intf = mcp251x_read_reg(spi, CANINTF);
+ u8 eflag;
+ int can_id = 0, data1 = 0;
- if (priv->restart_tx) {
- priv->restart_tx = 0;
- mcp251x_write_reg(spi, TXBCTRL(0), 0);
- if (priv->tx_skb || priv->tx_len)
- mcp251x_clean(net);
- netif_wake_queue(net);
- can_id |= CAN_ERR_RESTARTED;
+ if (intf & CANINTF_RX0IF) {
+ mcp251x_hw_rx(spi, 0);
+ /* Free one buffer ASAP */
+ mcp251x_write_bits(spi, CANINTF, intf & CANINTF_RX0IF,
+ 0x00);
}
- if (priv->wake) {
- /* Wait whilst the device wakes up */
- mdelay(10);
- priv->wake = 0;
- }
+ if (intf & CANINTF_RX1IF)
+ mcp251x_hw_rx(spi, 1);
- intf = mcp251x_read_reg(spi, CANINTF);
mcp251x_write_bits(spi, CANINTF, intf, 0x00);
+ eflag = mcp251x_read_reg(spi, EFLG);
+ mcp251x_write_reg(spi, EFLG, 0x00);
+
/* Update can state */
if (eflag & EFLG_TXBO) {
new_state = CAN_STATE_BUS_OFF;
@@ -850,59 +814,31 @@ static void mcp251x_irq_work_handler(struct work_struct *ws)
}
priv->can.state = new_state;
- if ((intf & CANINTF_ERRIF) || (can_id & CAN_ERR_RESTARTED)) {
- struct sk_buff *skb;
- struct can_frame *frame;
-
- /* Create error frame */
- skb = alloc_can_err_skb(net, &frame);
- if (skb) {
- /* Set error frame flags based on bus state */
- frame->can_id = can_id;
- frame->data[1] = data1;
-
- /* Update net stats for overflows */
- if (eflag & (EFLG_RX0OVR | EFLG_RX1OVR)) {
- if (eflag & EFLG_RX0OVR)
- net->stats.rx_over_errors++;
- if (eflag & EFLG_RX1OVR)
- net->stats.rx_over_errors++;
- frame->can_id |= CAN_ERR_CRTL;
- frame->data[1] |=
- CAN_ERR_CRTL_RX_OVERFLOW;
- }
-
- netif_rx(skb);
- } else {
- dev_info(&spi->dev,
- "cannot allocate error skb\n");
+ if (intf & CANINTF_ERRIF) {
+ /* Handle overflow counters */
+ if (eflag & (EFLG_RX0OVR | EFLG_RX1OVR)) {
+ if (eflag & EFLG_RX0OVR)
+ net->stats.rx_over_errors++;
+ if (eflag & EFLG_RX1OVR)
+ net->stats.rx_over_errors++;
+ can_id |= CAN_ERR_CRTL;
+ data1 |= CAN_ERR_CRTL_RX_OVERFLOW;
}
+ mcp251x_error_skb(net, can_id, data1);
}
if (priv->can.state == CAN_STATE_BUS_OFF) {
if (priv->can.restart_ms == 0) {
+ priv->force_quit = 1;
can_bus_off(net);
mcp251x_hw_sleep(spi);
- return;
+ break;
}
}
if (intf == 0)
break;
- if (intf & CANINTF_WAKIF)
- complete(&priv->awake);
-
- if (intf & CANINTF_MERRF) {
- /* If there are pending Tx buffers, restart queue */
- txbnctrl = mcp251x_read_reg(spi, TXBCTRL(0));
- if (!(txbnctrl & TXBCTRL_TXREQ)) {
- if (priv->tx_skb || priv->tx_len)
- mcp251x_clean(net);
- netif_wake_queue(net);
- }
- }
-
if (intf & (CANINTF_TX2IF | CANINTF_TX1IF | CANINTF_TX0IF)) {
net->stats.tx_packets++;
net->stats.tx_bytes += priv->tx_len - 1;
@@ -913,12 +849,66 @@ static void mcp251x_irq_work_handler(struct work_struct *ws)
netif_wake_queue(net);
}
- if (intf & CANINTF_RX0IF)
- mcp251x_hw_rx(spi, 0);
+ }
+ mutex_unlock(&priv->mcp_lock);
+ return IRQ_HANDLED;
+}
- if (intf & CANINTF_RX1IF)
- mcp251x_hw_rx(spi, 1);
+static int mcp251x_open(struct net_device *net)
+{
+ struct mcp251x_priv *priv = netdev_priv(net);
+ struct spi_device *spi = priv->spi;
+ struct mcp251x_platform_data *pdata = spi->dev.platform_data;
+ int ret;
+
+ ret = open_candev(net);
+ if (ret) {
+ dev_err(&spi->dev, "unable to set initial baudrate!\n");
+ return ret;
+ }
+
+ mutex_lock(&priv->mcp_lock);
+ if (pdata->transceiver_enable)
+ pdata->transceiver_enable(1);
+
+ priv->force_quit = 0;
+ priv->tx_skb = NULL;
+ priv->tx_len = 0;
+
+ ret = request_threaded_irq(spi->irq, NULL, mcp251x_can_ist,
+ IRQF_TRIGGER_FALLING, DEVICE_NAME, priv);
+ if (ret) {
+ dev_err(&spi->dev, "failed to acquire irq %d\n", spi->irq);
+ if (pdata->transceiver_enable)
+ pdata->transceiver_enable(0);
+ close_candev(net);
+ goto open_unlock;
+ }
+
+ priv->wq = create_freezeable_workqueue("mcp251x_wq");
+ INIT_WORK(&priv->tx_work, mcp251x_tx_work_handler);
+ INIT_WORK(&priv->restart_work, mcp251x_restart_work_handler);
+
+ ret = mcp251x_hw_reset(spi);
+ if (ret) {
+ mcp251x_open_clean(net);
+ goto open_unlock;
+ }
+ ret = mcp251x_setup(net, priv, spi);
+ if (ret) {
+ mcp251x_open_clean(net);
+ goto open_unlock;
}
+ ret = mcp251x_set_normal_mode(spi);
+ if (ret) {
+ mcp251x_open_clean(net);
+ goto open_unlock;
+ }
+ netif_wake_queue(net);
+
+open_unlock:
+ mutex_unlock(&priv->mcp_lock);
+ return ret;
}
static const struct net_device_ops mcp251x_netdev_ops = {
@@ -952,11 +942,13 @@ static int __devinit mcp251x_can_probe(struct spi_device *spi)
priv->can.bittiming_const = &mcp251x_bittiming_const;
priv->can.do_set_mode = mcp251x_do_set_mode;
priv->can.clock.freq = pdata->oscillator_frequency / 2;
+ priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
+ CAN_CTRLMODE_LOOPBACK | CAN_CTRLMODE_LISTENONLY;
priv->net = net;
dev_set_drvdata(&spi->dev, priv);
priv->spi = spi;
- mutex_init(&priv->spi_lock);
+ mutex_init(&priv->mcp_lock);
/* If requested, allocate DMA buffers */
if (mcp251x_enable_dma) {
@@ -1005,18 +997,12 @@ static int __devinit mcp251x_can_probe(struct spi_device *spi)
SET_NETDEV_DEV(net, &spi->dev);
- priv->wq = create_freezeable_workqueue("mcp251x_wq");
-
- INIT_WORK(&priv->tx_work, mcp251x_tx_work_handler);
- INIT_WORK(&priv->irq_work, mcp251x_irq_work_handler);
-
- init_completion(&priv->awake);
-
/* Configure the SPI bus */
spi->mode = SPI_MODE_0;
spi->bits_per_word = 8;
spi_setup(spi);
+ /* Here is OK to not lock the MCP, no one knows about it yet */
if (!mcp251x_hw_probe(spi)) {
dev_info(&spi->dev, "Probe failed\n");
goto error_probe;
@@ -1059,10 +1045,6 @@ static int __devexit mcp251x_can_remove(struct spi_device *spi)
unregister_candev(net);
free_candev(net);
- priv->force_quit = 1;
- flush_workqueue(priv->wq);
- destroy_workqueue(priv->wq);
-
if (mcp251x_enable_dma) {
dma_free_coherent(&spi->dev, PAGE_SIZE,
priv->spi_tx_buf, priv->spi_tx_dma);
@@ -1084,6 +1066,12 @@ static int mcp251x_can_suspend(struct spi_device *spi, pm_message_t state)
struct mcp251x_priv *priv = dev_get_drvdata(&spi->dev);
struct net_device *net = priv->net;
+ priv->force_quit = 1;
+ disable_irq(spi->irq);
+ /*
+ * Note: at this point neither IST nor workqueues are running.
+ * open/stop cannot be called anyway so locking is not needed
+ */
if (netif_running(net)) {
netif_device_detach(net);
@@ -1110,16 +1098,18 @@ static int mcp251x_can_resume(struct spi_device *spi)
if (priv->after_suspend & AFTER_SUSPEND_POWER) {
pdata->power_enable(1);
- queue_work(priv->wq, &priv->irq_work);
+ queue_work(priv->wq, &priv->restart_work);
} else {
if (priv->after_suspend & AFTER_SUSPEND_UP) {
if (pdata->transceiver_enable)
pdata->transceiver_enable(1);
- queue_work(priv->wq, &priv->irq_work);
+ queue_work(priv->wq, &priv->restart_work);
} else {
priv->after_suspend = 0;
}
}
+ priv->force_quit = 0;
+ enable_irq(spi->irq);
return 0;
}
#else
diff --git a/drivers/net/can/mscan/Kconfig b/drivers/net/can/mscan/Kconfig
index cd0f2d6f375d..27d1d398e25e 100644
--- a/drivers/net/can/mscan/Kconfig
+++ b/drivers/net/can/mscan/Kconfig
@@ -11,12 +11,13 @@ if CAN_MSCAN
config CAN_MPC5XXX
tristate "Freescale MPC5xxx onboard CAN controller"
- depends on PPC_MPC52xx
+ depends on (PPC_MPC52xx || PPC_MPC512x)
---help---
If you say yes here you get support for Freescale's MPC5xxx
- onboard CAN controller.
+ onboard CAN controller. Currently, the MPC5200, MPC5200B and
+ MPC5121 (Rev. 2 and later) are supported.
- This driver can also be built as a module. If so, the module
+ This driver can also be built as a module. If so, the module
will be called mscan-mpc5xxx.ko.
endif
diff --git a/drivers/net/can/mscan/mpc5xxx_can.c b/drivers/net/can/mscan/mpc5xxx_can.c
index 1de6f6349b16..03e7c48465a2 100644
--- a/drivers/net/can/mscan/mpc5xxx_can.c
+++ b/drivers/net/can/mscan/mpc5xxx_can.c
@@ -29,6 +29,7 @@
#include <linux/can/dev.h>
#include <linux/of_platform.h>
#include <sysdev/fsl_soc.h>
+#include <linux/clk.h>
#include <linux/io.h>
#include <asm/mpc52xx.h>
@@ -36,22 +37,21 @@
#define DRV_NAME "mpc5xxx_can"
-static struct of_device_id mpc52xx_cdm_ids[] __devinitdata = {
+struct mpc5xxx_can_data {
+ unsigned int type;
+ u32 (*get_clock)(struct of_device *ofdev, const char *clock_name,
+ int *mscan_clksrc);
+};
+
+#ifdef CONFIG_PPC_MPC52xx
+static struct of_device_id __devinitdata mpc52xx_cdm_ids[] = {
{ .compatible = "fsl,mpc5200-cdm", },
{}
};
-/*
- * Get frequency of the MSCAN clock source
- *
- * Either the oscillator clock (SYS_XTAL_IN) or the IP bus clock (IP_CLK)
- * can be selected. According to the MPC5200 user's manual, the oscillator
- * clock is the better choice as it has less jitter but due to a hardware
- * bug, it can not be selected for the old MPC5200 Rev. A chips.
- */
-
-static unsigned int __devinit mpc52xx_can_clock_freq(struct of_device *of,
- int clock_src)
+static u32 __devinit mpc52xx_can_get_clock(struct of_device *ofdev,
+ const char *clock_name,
+ int *mscan_clksrc)
{
unsigned int pvr;
struct mpc52xx_cdm __iomem *cdm;
@@ -61,21 +61,33 @@ static unsigned int __devinit mpc52xx_can_clock_freq(struct of_device *of,
pvr = mfspr(SPRN_PVR);
- freq = mpc5xxx_get_bus_frequency(of->node);
+ /*
+ * Either the oscillator clock (SYS_XTAL_IN) or the IP bus clock
+ * (IP_CLK) can be selected as MSCAN clock source. According to
+ * the MPC5200 user's manual, the oscillator clock is the better
+ * choice as it has less jitter. For this reason, it is selected
+ * by default. Unfortunately, it can not be selected for the old
+ * MPC5200 Rev. A chips due to a hardware bug (check errata).
+ */
+ if (clock_name && strcmp(clock_name, "ip") == 0)
+ *mscan_clksrc = MSCAN_CLKSRC_BUS;
+ else
+ *mscan_clksrc = MSCAN_CLKSRC_XTAL;
+
+ freq = mpc5xxx_get_bus_frequency(ofdev->node);
if (!freq)
return 0;
- if (clock_src == MSCAN_CLKSRC_BUS || pvr == 0x80822011)
+ if (*mscan_clksrc == MSCAN_CLKSRC_BUS || pvr == 0x80822011)
return freq;
/* Determine SYS_XTAL_IN frequency from the clock domain settings */
np_cdm = of_find_matching_node(NULL, mpc52xx_cdm_ids);
if (!np_cdm) {
- dev_err(&of->dev, "can't get clock node!\n");
+ dev_err(&ofdev->dev, "can't get clock node!\n");
return 0;
}
cdm = of_iomap(np_cdm, 0);
- of_node_put(np_cdm);
if (in_8(&cdm->ipb_clk_sel) & 0x1)
freq *= 2;
@@ -84,26 +96,174 @@ static unsigned int __devinit mpc52xx_can_clock_freq(struct of_device *of,
freq *= (val & (1 << 5)) ? 8 : 4;
freq /= (val & (1 << 6)) ? 12 : 16;
+ of_node_put(np_cdm);
iounmap(cdm);
return freq;
}
+#else /* !CONFIG_PPC_MPC52xx */
+static u32 __devinit mpc52xx_can_get_clock(struct of_device *ofdev,
+ const char *clock_name,
+ int *mscan_clksrc)
+{
+ return 0;
+}
+#endif /* CONFIG_PPC_MPC52xx */
+
+#ifdef CONFIG_PPC_MPC512x
+struct mpc512x_clockctl {
+ u32 spmr; /* System PLL Mode Reg */
+ u32 sccr[2]; /* System Clk Ctrl Reg 1 & 2 */
+ u32 scfr1; /* System Clk Freq Reg 1 */
+ u32 scfr2; /* System Clk Freq Reg 2 */
+ u32 reserved;
+ u32 bcr; /* Bread Crumb Reg */
+ u32 pccr[12]; /* PSC Clk Ctrl Reg 0-11 */
+ u32 spccr; /* SPDIF Clk Ctrl Reg */
+ u32 cccr; /* CFM Clk Ctrl Reg */
+ u32 dccr; /* DIU Clk Cnfg Reg */
+ u32 mccr[4]; /* MSCAN Clk Ctrl Reg 1-3 */
+};
+
+static struct of_device_id __devinitdata mpc512x_clock_ids[] = {
+ { .compatible = "fsl,mpc5121-clock", },
+ {}
+};
+
+static u32 __devinit mpc512x_can_get_clock(struct of_device *ofdev,
+ const char *clock_name,
+ int *mscan_clksrc)
+{
+ struct mpc512x_clockctl __iomem *clockctl;
+ struct device_node *np_clock;
+ struct clk *sys_clk, *ref_clk;
+ int plen, clockidx, clocksrc = -1;
+ u32 sys_freq, val, clockdiv = 1, freq = 0;
+ const u32 *pval;
+
+ np_clock = of_find_matching_node(NULL, mpc512x_clock_ids);
+ if (!np_clock) {
+ dev_err(&ofdev->dev, "couldn't find clock node\n");
+ return -ENODEV;
+ }
+ clockctl = of_iomap(np_clock, 0);
+ if (!clockctl) {
+ dev_err(&ofdev->dev, "couldn't map clock registers\n");
+ return 0;
+ }
+
+ /* Determine the MSCAN device index from the physical address */
+ pval = of_get_property(ofdev->node, "reg", &plen);
+ BUG_ON(!pval || plen < sizeof(*pval));
+ clockidx = (*pval & 0x80) ? 1 : 0;
+ if (*pval & 0x2000)
+ clockidx += 2;
+
+ /*
+ * Clock source and divider selection: 3 different clock sources
+ * can be selected: "ip", "ref" or "sys". For the latter two, a
+ * clock divider can be defined as well. If the clock source is
+ * not specified by the device tree, we first try to find an
+ * optimal CAN source clock based on the system clock. If that
+ * is not posslible, the reference clock will be used.
+ */
+ if (clock_name && !strcmp(clock_name, "ip")) {
+ *mscan_clksrc = MSCAN_CLKSRC_IPS;
+ freq = mpc5xxx_get_bus_frequency(ofdev->node);
+ } else {
+ *mscan_clksrc = MSCAN_CLKSRC_BUS;
+
+ pval = of_get_property(ofdev->node,
+ "fsl,mscan-clock-divider", &plen);
+ if (pval && plen == sizeof(*pval))
+ clockdiv = *pval;
+ if (!clockdiv)
+ clockdiv = 1;
+
+ if (!clock_name || !strcmp(clock_name, "sys")) {
+ sys_clk = clk_get(&ofdev->dev, "sys_clk");
+ if (!sys_clk) {
+ dev_err(&ofdev->dev, "couldn't get sys_clk\n");
+ goto exit_unmap;
+ }
+ /* Get and round up/down sys clock rate */
+ sys_freq = 1000000 *
+ ((clk_get_rate(sys_clk) + 499999) / 1000000);
+
+ if (!clock_name) {
+ /* A multiple of 16 MHz would be optimal */
+ if ((sys_freq % 16000000) == 0) {
+ clocksrc = 0;
+ clockdiv = sys_freq / 16000000;
+ freq = sys_freq / clockdiv;
+ }
+ } else {
+ clocksrc = 0;
+ freq = sys_freq / clockdiv;
+ }
+ }
+
+ if (clocksrc < 0) {
+ ref_clk = clk_get(&ofdev->dev, "ref_clk");
+ if (!ref_clk) {
+ dev_err(&ofdev->dev, "couldn't get ref_clk\n");
+ goto exit_unmap;
+ }
+ clocksrc = 1;
+ freq = clk_get_rate(ref_clk) / clockdiv;
+ }
+ }
+
+ /* Disable clock */
+ out_be32(&clockctl->mccr[clockidx], 0x0);
+ if (clocksrc >= 0) {
+ /* Set source and divider */
+ val = (clocksrc << 14) | ((clockdiv - 1) << 17);
+ out_be32(&clockctl->mccr[clockidx], val);
+ /* Enable clock */
+ out_be32(&clockctl->mccr[clockidx], val | 0x10000);
+ }
+
+ /* Enable MSCAN clock domain */
+ val = in_be32(&clockctl->sccr[1]);
+ if (!(val & (1 << 25)))
+ out_be32(&clockctl->sccr[1], val | (1 << 25));
+
+ dev_dbg(&ofdev->dev, "using '%s' with frequency divider %d\n",
+ *mscan_clksrc == MSCAN_CLKSRC_IPS ? "ips_clk" :
+ clocksrc == 1 ? "ref_clk" : "sys_clk", clockdiv);
+
+exit_unmap:
+ of_node_put(np_clock);
+ iounmap(clockctl);
+
+ return freq;
+}
+#else /* !CONFIG_PPC_MPC512x */
+static u32 __devinit mpc512x_can_get_clock(struct of_device *ofdev,
+ const char *clock_name,
+ int *mscan_clksrc)
+{
+ return 0;
+}
+#endif /* CONFIG_PPC_MPC512x */
static int __devinit mpc5xxx_can_probe(struct of_device *ofdev,
const struct of_device_id *id)
{
+ struct mpc5xxx_can_data *data = (struct mpc5xxx_can_data *)id->data;
struct device_node *np = ofdev->node;
struct net_device *dev;
struct mscan_priv *priv;
void __iomem *base;
- const char *clk_src;
- int err, irq, clock_src;
+ const char *clock_name = NULL;
+ int irq, mscan_clksrc = 0;
+ int err = -ENOMEM;
- base = of_iomap(ofdev->node, 0);
+ base = of_iomap(np, 0);
if (!base) {
dev_err(&ofdev->dev, "couldn't ioremap\n");
- err = -ENOMEM;
- goto exit_release_mem;
+ return err;
}
irq = irq_of_parse_and_map(np, 0);
@@ -114,37 +274,27 @@ static int __devinit mpc5xxx_can_probe(struct of_device *ofdev,
}
dev = alloc_mscandev();
- if (!dev) {
- err = -ENOMEM;
+ if (!dev)
goto exit_dispose_irq;
- }
priv = netdev_priv(dev);
priv->reg_base = base;
dev->irq = irq;
- /*
- * Either the oscillator clock (SYS_XTAL_IN) or the IP bus clock
- * (IP_CLK) can be selected as MSCAN clock source. According to
- * the MPC5200 user's manual, the oscillator clock is the better
- * choice as it has less jitter. For this reason, it is selected
- * by default.
- */
- clk_src = of_get_property(np, "fsl,mscan-clock-source", NULL);
- if (clk_src && strcmp(clk_src, "ip") == 0)
- clock_src = MSCAN_CLKSRC_BUS;
- else
- clock_src = MSCAN_CLKSRC_XTAL;
- priv->can.clock.freq = mpc52xx_can_clock_freq(ofdev, clock_src);
+ clock_name = of_get_property(np, "fsl,mscan-clock-source", NULL);
+
+ BUG_ON(!data);
+ priv->type = data->type;
+ priv->can.clock.freq = data->get_clock(ofdev, clock_name,
+ &mscan_clksrc);
if (!priv->can.clock.freq) {
- dev_err(&ofdev->dev, "couldn't get MSCAN clock frequency\n");
- err = -ENODEV;
+ dev_err(&ofdev->dev, "couldn't get MSCAN clock properties\n");
goto exit_free_mscan;
}
SET_NETDEV_DEV(dev, &ofdev->dev);
- err = register_mscandev(dev, clock_src);
+ err = register_mscandev(dev, mscan_clksrc);
if (err) {
dev_err(&ofdev->dev, "registering %s failed (err=%d)\n",
DRV_NAME, err);
@@ -164,7 +314,7 @@ exit_dispose_irq:
irq_dispose_mapping(irq);
exit_unmap_mem:
iounmap(base);
-exit_release_mem:
+
return err;
}
@@ -225,8 +375,20 @@ static int mpc5xxx_can_resume(struct of_device *ofdev)
}
#endif
+static struct mpc5xxx_can_data __devinitdata mpc5200_can_data = {
+ .type = MSCAN_TYPE_MPC5200,
+ .get_clock = mpc52xx_can_get_clock,
+};
+
+static struct mpc5xxx_can_data __devinitdata mpc5121_can_data = {
+ .type = MSCAN_TYPE_MPC5121,
+ .get_clock = mpc512x_can_get_clock,
+};
+
static struct of_device_id __devinitdata mpc5xxx_can_table[] = {
- {.compatible = "fsl,mpc5200-mscan"},
+ { .compatible = "fsl,mpc5200-mscan", .data = &mpc5200_can_data, },
+ /* Note that only MPC5121 Rev. 2 (and later) is supported */
+ { .compatible = "fsl,mpc5121-mscan", .data = &mpc5121_can_data, },
{},
};
@@ -255,5 +417,5 @@ static void __exit mpc5xxx_can_exit(void)
module_exit(mpc5xxx_can_exit);
MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
-MODULE_DESCRIPTION("Freescale MPC5200 CAN driver");
+MODULE_DESCRIPTION("Freescale MPC5xxx CAN driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c
index 07346f880ca6..6b7dd578d417 100644
--- a/drivers/net/can/mscan/mscan.c
+++ b/drivers/net/can/mscan/mscan.c
@@ -4,7 +4,7 @@
* Copyright (C) 2005-2006 Andrey Volkov <avolkov@varma-el.com>,
* Varma Electronics Oy
* Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com>
- * Copytight (C) 2008-2009 Pengutronix <kernel@pengutronix.de>
+ * Copyright (C) 2008-2009 Pengutronix <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the version 2 of the GNU General Public License
@@ -152,6 +152,12 @@ static int mscan_start(struct net_device *dev)
priv->shadow_canrier = 0;
priv->flags = 0;
+ if (priv->type == MSCAN_TYPE_MPC5121) {
+ /* Clear pending bus-off condition */
+ if (in_8(&regs->canmisc) & MSCAN_BOHOLD)
+ out_8(&regs->canmisc, MSCAN_BOHOLD);
+ }
+
err = mscan_set_mode(dev, MSCAN_NORMAL_MODE);
if (err)
return err;
@@ -163,8 +169,29 @@ static int mscan_start(struct net_device *dev)
out_8(&regs->cantier, 0);
/* Enable receive interrupts. */
- out_8(&regs->canrier, MSCAN_OVRIE | MSCAN_RXFIE | MSCAN_CSCIE |
- MSCAN_RSTATE1 | MSCAN_RSTATE0 | MSCAN_TSTATE1 | MSCAN_TSTATE0);
+ out_8(&regs->canrier, MSCAN_RX_INTS_ENABLE);
+
+ return 0;
+}
+
+static int mscan_restart(struct net_device *dev)
+{
+ struct mscan_priv *priv = netdev_priv(dev);
+
+ if (priv->type == MSCAN_TYPE_MPC5121) {
+ struct mscan_regs *regs = (struct mscan_regs *)priv->reg_base;
+
+ priv->can.state = CAN_STATE_ERROR_ACTIVE;
+ WARN(!(in_8(&regs->canmisc) & MSCAN_BOHOLD),
+ "bus-off state expected");
+ out_8(&regs->canmisc, MSCAN_BOHOLD);
+ /* Re-enable receive interrupts. */
+ out_8(&regs->canrier, MSCAN_RX_INTS_ENABLE);
+ } else {
+ if (priv->can.state <= CAN_STATE_BUS_OFF)
+ mscan_set_mode(dev, MSCAN_INIT_MODE);
+ return mscan_start(dev);
+ }
return 0;
}
@@ -177,8 +204,8 @@ static netdev_tx_t mscan_start_xmit(struct sk_buff *skb, struct net_device *dev)
int i, rtr, buf_id;
u32 can_id;
- if (frame->can_dlc > 8)
- return -EINVAL;
+ if (can_dropped_invalid_skb(dev, skb))
+ return NETDEV_TX_OK;
out_8(&regs->cantier, 0);
@@ -359,9 +386,12 @@ static void mscan_get_err_frame(struct net_device *dev, struct can_frame *frame,
* automatically. To avoid that we stop the chip doing
* a light-weight stop (we are in irq-context).
*/
- out_8(&regs->cantier, 0);
- out_8(&regs->canrier, 0);
- setbits8(&regs->canctl0, MSCAN_SLPRQ | MSCAN_INITRQ);
+ if (priv->type != MSCAN_TYPE_MPC5121) {
+ out_8(&regs->cantier, 0);
+ out_8(&regs->canrier, 0);
+ setbits8(&regs->canctl0,
+ MSCAN_SLPRQ | MSCAN_INITRQ);
+ }
can_bus_off(dev);
break;
default:
@@ -491,9 +521,7 @@ static int mscan_do_set_mode(struct net_device *dev, enum can_mode mode)
switch (mode) {
case CAN_MODE_START:
- if (priv->can.state <= CAN_STATE_BUS_OFF)
- mscan_set_mode(dev, MSCAN_INIT_MODE);
- ret = mscan_start(dev);
+ ret = mscan_restart(dev);
if (ret)
break;
if (netif_queue_stopped(dev))
@@ -592,18 +620,21 @@ static const struct net_device_ops mscan_netdev_ops = {
.ndo_start_xmit = mscan_start_xmit,
};
-int register_mscandev(struct net_device *dev, int clock_src)
+int register_mscandev(struct net_device *dev, int mscan_clksrc)
{
struct mscan_priv *priv = netdev_priv(dev);
struct mscan_regs *regs = (struct mscan_regs *)priv->reg_base;
u8 ctl1;
ctl1 = in_8(&regs->canctl1);
- if (clock_src)
+ if (mscan_clksrc)
ctl1 |= MSCAN_CLKSRC;
else
ctl1 &= ~MSCAN_CLKSRC;
+ if (priv->type == MSCAN_TYPE_MPC5121)
+ ctl1 |= MSCAN_BORM; /* bus-off recovery upon request */
+
ctl1 |= MSCAN_CANE;
out_8(&regs->canctl1, ctl1);
udelay(100);
@@ -655,6 +686,7 @@ struct net_device *alloc_mscandev(void)
priv->can.bittiming_const = &mscan_bittiming_const;
priv->can.do_set_bittiming = mscan_do_set_bittiming;
priv->can.do_set_mode = mscan_do_set_mode;
+ priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
for (i = 0; i < TX_QUEUE_SIZE; i++) {
priv->tx_queue[i].id = i;
diff --git a/drivers/net/can/mscan/mscan.h b/drivers/net/can/mscan/mscan.h
index 00fc4aaf1ed8..4ff966473bc9 100644
--- a/drivers/net/can/mscan/mscan.h
+++ b/drivers/net/can/mscan/mscan.h
@@ -38,18 +38,20 @@
#define MSCAN_CLKSRC 0x40
#define MSCAN_LOOPB 0x20
#define MSCAN_LISTEN 0x10
+#define MSCAN_BORM 0x08
#define MSCAN_WUPM 0x04
#define MSCAN_SLPAK 0x02
#define MSCAN_INITAK 0x01
-/* Use the MPC5200 MSCAN variant? */
+/* Use the MPC5XXX MSCAN variant? */
#ifdef CONFIG_PPC
-#define MSCAN_FOR_MPC5200
+#define MSCAN_FOR_MPC5XXX
#endif
-#ifdef MSCAN_FOR_MPC5200
+#ifdef MSCAN_FOR_MPC5XXX
#define MSCAN_CLKSRC_BUS 0
#define MSCAN_CLKSRC_XTAL MSCAN_CLKSRC
+#define MSCAN_CLKSRC_IPS MSCAN_CLKSRC
#else
#define MSCAN_CLKSRC_BUS MSCAN_CLKSRC
#define MSCAN_CLKSRC_XTAL 0
@@ -136,7 +138,7 @@
#define MSCAN_EFF_RTR_SHIFT 0
#define MSCAN_EFF_FLAGS 0x18 /* IDE + SRR */
-#ifdef MSCAN_FOR_MPC5200
+#ifdef MSCAN_FOR_MPC5XXX
#define _MSCAN_RESERVED_(n, num) u8 _res##n[num]
#define _MSCAN_RESERVED_DSR_SIZE 2
#else
@@ -165,67 +167,66 @@ struct mscan_regs {
u8 cantbsel; /* + 0x14 0x0a */
u8 canidac; /* + 0x15 0x0b */
u8 reserved; /* + 0x16 0x0c */
- _MSCAN_RESERVED_(6, 5); /* + 0x17 */
-#ifndef MSCAN_FOR_MPC5200
- u8 canmisc; /* 0x0d */
-#endif
+ _MSCAN_RESERVED_(6, 2); /* + 0x17 */
+ u8 canmisc; /* + 0x19 0x0d */
+ _MSCAN_RESERVED_(7, 2); /* + 0x1a */
u8 canrxerr; /* + 0x1c 0x0e */
u8 cantxerr; /* + 0x1d 0x0f */
- _MSCAN_RESERVED_(7, 2); /* + 0x1e */
+ _MSCAN_RESERVED_(8, 2); /* + 0x1e */
u16 canidar1_0; /* + 0x20 0x10 */
- _MSCAN_RESERVED_(8, 2); /* + 0x22 */
+ _MSCAN_RESERVED_(9, 2); /* + 0x22 */
u16 canidar3_2; /* + 0x24 0x12 */
- _MSCAN_RESERVED_(9, 2); /* + 0x26 */
+ _MSCAN_RESERVED_(10, 2); /* + 0x26 */
u16 canidmr1_0; /* + 0x28 0x14 */
- _MSCAN_RESERVED_(10, 2); /* + 0x2a */
+ _MSCAN_RESERVED_(11, 2); /* + 0x2a */
u16 canidmr3_2; /* + 0x2c 0x16 */
- _MSCAN_RESERVED_(11, 2); /* + 0x2e */
+ _MSCAN_RESERVED_(12, 2); /* + 0x2e */
u16 canidar5_4; /* + 0x30 0x18 */
- _MSCAN_RESERVED_(12, 2); /* + 0x32 */
+ _MSCAN_RESERVED_(13, 2); /* + 0x32 */
u16 canidar7_6; /* + 0x34 0x1a */
- _MSCAN_RESERVED_(13, 2); /* + 0x36 */
+ _MSCAN_RESERVED_(14, 2); /* + 0x36 */
u16 canidmr5_4; /* + 0x38 0x1c */
- _MSCAN_RESERVED_(14, 2); /* + 0x3a */
+ _MSCAN_RESERVED_(15, 2); /* + 0x3a */
u16 canidmr7_6; /* + 0x3c 0x1e */
- _MSCAN_RESERVED_(15, 2); /* + 0x3e */
+ _MSCAN_RESERVED_(16, 2); /* + 0x3e */
struct {
u16 idr1_0; /* + 0x40 0x20 */
- _MSCAN_RESERVED_(16, 2); /* + 0x42 */
+ _MSCAN_RESERVED_(17, 2); /* + 0x42 */
u16 idr3_2; /* + 0x44 0x22 */
- _MSCAN_RESERVED_(17, 2); /* + 0x46 */
+ _MSCAN_RESERVED_(18, 2); /* + 0x46 */
u16 dsr1_0; /* + 0x48 0x24 */
- _MSCAN_RESERVED_(18, 2); /* + 0x4a */
+ _MSCAN_RESERVED_(19, 2); /* + 0x4a */
u16 dsr3_2; /* + 0x4c 0x26 */
- _MSCAN_RESERVED_(19, 2); /* + 0x4e */
+ _MSCAN_RESERVED_(20, 2); /* + 0x4e */
u16 dsr5_4; /* + 0x50 0x28 */
- _MSCAN_RESERVED_(20, 2); /* + 0x52 */
+ _MSCAN_RESERVED_(21, 2); /* + 0x52 */
u16 dsr7_6; /* + 0x54 0x2a */
- _MSCAN_RESERVED_(21, 2); /* + 0x56 */
+ _MSCAN_RESERVED_(22, 2); /* + 0x56 */
u8 dlr; /* + 0x58 0x2c */
- u8:8; /* + 0x59 0x2d */
- _MSCAN_RESERVED_(22, 2); /* + 0x5a */
+ u8 reserved; /* + 0x59 0x2d */
+ _MSCAN_RESERVED_(23, 2); /* + 0x5a */
u16 time; /* + 0x5c 0x2e */
} rx;
- _MSCAN_RESERVED_(23, 2); /* + 0x5e */
+ _MSCAN_RESERVED_(24, 2); /* + 0x5e */
struct {
u16 idr1_0; /* + 0x60 0x30 */
- _MSCAN_RESERVED_(24, 2); /* + 0x62 */
+ _MSCAN_RESERVED_(25, 2); /* + 0x62 */
u16 idr3_2; /* + 0x64 0x32 */
- _MSCAN_RESERVED_(25, 2); /* + 0x66 */
+ _MSCAN_RESERVED_(26, 2); /* + 0x66 */
u16 dsr1_0; /* + 0x68 0x34 */
- _MSCAN_RESERVED_(26, 2); /* + 0x6a */
+ _MSCAN_RESERVED_(27, 2); /* + 0x6a */
u16 dsr3_2; /* + 0x6c 0x36 */
- _MSCAN_RESERVED_(27, 2); /* + 0x6e */
+ _MSCAN_RESERVED_(28, 2); /* + 0x6e */
u16 dsr5_4; /* + 0x70 0x38 */
- _MSCAN_RESERVED_(28, 2); /* + 0x72 */
+ _MSCAN_RESERVED_(29, 2); /* + 0x72 */
u16 dsr7_6; /* + 0x74 0x3a */
- _MSCAN_RESERVED_(29, 2); /* + 0x76 */
+ _MSCAN_RESERVED_(30, 2); /* + 0x76 */
u8 dlr; /* + 0x78 0x3c */
u8 tbpr; /* + 0x79 0x3d */
- _MSCAN_RESERVED_(30, 2); /* + 0x7a */
+ _MSCAN_RESERVED_(31, 2); /* + 0x7a */
u16 time; /* + 0x7c 0x3e */
} tx;
- _MSCAN_RESERVED_(31, 2); /* + 0x7e */
+ _MSCAN_RESERVED_(32, 2); /* + 0x7e */
} __attribute__ ((packed));
#undef _MSCAN_RESERVED_
@@ -237,6 +238,15 @@ struct mscan_regs {
#define MSCAN_POWEROFF_MODE (MSCAN_CSWAI | MSCAN_SLPRQ)
#define MSCAN_SET_MODE_RETRIES 255
#define MSCAN_ECHO_SKB_MAX 3
+#define MSCAN_RX_INTS_ENABLE (MSCAN_OVRIE | MSCAN_RXFIE | MSCAN_CSCIE | \
+ MSCAN_RSTATE1 | MSCAN_RSTATE0 | \
+ MSCAN_TSTATE1 | MSCAN_TSTATE0)
+
+/* MSCAN type variants */
+enum {
+ MSCAN_TYPE_MPC5200,
+ MSCAN_TYPE_MPC5121
+};
#define BTR0_BRP_MASK 0x3f
#define BTR0_SJW_SHIFT 6
@@ -270,6 +280,7 @@ struct tx_queue_entry {
struct mscan_priv {
struct can_priv can; /* must be the first member */
+ unsigned int type; /* MSCAN type variants */
long open_time;
unsigned long flags;
void __iomem *reg_base; /* ioremap'ed address to registers */
@@ -285,12 +296,7 @@ struct mscan_priv {
};
extern struct net_device *alloc_mscandev(void);
-/*
- * clock_src:
- * 1 = The MSCAN clock source is the onchip Bus Clock.
- * 0 = The MSCAN clock source is the chip Oscillator Clock.
- */
-extern int register_mscandev(struct net_device *dev, int clock_src);
+extern int register_mscandev(struct net_device *dev, int mscan_clksrc);
extern void unregister_mscandev(struct net_device *dev);
#endif /* __MSCAN_H__ */
diff --git a/drivers/net/can/sja1000/Kconfig b/drivers/net/can/sja1000/Kconfig
index 4c674927f247..9e277d64a318 100644
--- a/drivers/net/can/sja1000/Kconfig
+++ b/drivers/net/can/sja1000/Kconfig
@@ -44,4 +44,16 @@ config CAN_KVASER_PCI
This driver is for the the PCIcanx and PCIcan cards (1, 2 or
4 channel) from Kvaser (http://www.kvaser.com).
+config CAN_PLX_PCI
+ tristate "PLX90xx PCI-bridge based Cards"
+ depends on PCI
+ ---help---
+ This driver is for CAN interface cards based on
+ the PLX90xx PCI bridge.
+ Driver supports now:
+ - Adlink PCI-7841/cPCI-7841 card (http://www.adlinktech.com/)
+ - Adlink PCI-7841/cPCI-7841 SE card
+ - Marathon CAN-bus-PCI card (http://www.marathon.ru/)
+ - TEWS TECHNOLOGIES TPMC810 card (http://www.tews.com/)
+
endif
diff --git a/drivers/net/can/sja1000/Makefile b/drivers/net/can/sja1000/Makefile
index 9d245ac03965..ce924553995d 100644
--- a/drivers/net/can/sja1000/Makefile
+++ b/drivers/net/can/sja1000/Makefile
@@ -8,5 +8,6 @@ obj-$(CONFIG_CAN_SJA1000_PLATFORM) += sja1000_platform.o
obj-$(CONFIG_CAN_SJA1000_OF_PLATFORM) += sja1000_of_platform.o
obj-$(CONFIG_CAN_EMS_PCI) += ems_pci.o
obj-$(CONFIG_CAN_KVASER_PCI) += kvaser_pci.o
+obj-$(CONFIG_CAN_PLX_PCI) += plx_pci.o
ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c
index fd04789d3370..87300606abb9 100644
--- a/drivers/net/can/sja1000/ems_pci.c
+++ b/drivers/net/can/sja1000/ems_pci.c
@@ -102,7 +102,7 @@ struct ems_pci_card {
#define EMS_PCI_BASE_SIZE 4096 /* size of controller area */
-static struct pci_device_id ems_pci_tbl[] = {
+static DEFINE_PCI_DEVICE_TABLE(ems_pci_tbl) = {
/* CPC-PCI v1 */
{PCI_VENDOR_ID_SIEMENS, 0x2104, PCI_ANY_ID, PCI_ANY_ID,},
/* CPC-PCI v2 */
diff --git a/drivers/net/can/sja1000/kvaser_pci.c b/drivers/net/can/sja1000/kvaser_pci.c
index 7dd7769b9713..441e776a7f59 100644
--- a/drivers/net/can/sja1000/kvaser_pci.c
+++ b/drivers/net/can/sja1000/kvaser_pci.c
@@ -109,7 +109,7 @@ struct kvaser_pci {
#define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */
#define KVASER_PCI_DEVICE_ID2 0x0008
-static struct pci_device_id kvaser_pci_tbl[] = {
+static DEFINE_PCI_DEVICE_TABLE(kvaser_pci_tbl) = {
{KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
{KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
{ 0,}
diff --git a/drivers/net/can/sja1000/plx_pci.c b/drivers/net/can/sja1000/plx_pci.c
new file mode 100644
index 000000000000..6b46a6395f80
--- /dev/null
+++ b/drivers/net/can/sja1000/plx_pci.c
@@ -0,0 +1,472 @@
+/*
+ * Copyright (C) 2008-2010 Pavel Cheblakov <P.B.Cheblakov@inp.nsk.su>
+ *
+ * Derived from the ems_pci.c driver:
+ * Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
+ * Copyright (C) 2008 Markus Plessing <plessing@ems-wuensche.com>
+ * Copyright (C) 2008 Sebastian Haas <haas@ems-wuensche.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/io.h>
+
+#include "sja1000.h"
+
+#define DRV_NAME "sja1000_plx_pci"
+
+MODULE_AUTHOR("Pavel Cheblakov <P.B.Cheblakov@inp.nsk.su>");
+MODULE_DESCRIPTION("Socket-CAN driver for PLX90xx PCI-bridge cards with "
+ "the SJA1000 chips");
+MODULE_SUPPORTED_DEVICE("Adlink PCI-7841/cPCI-7841, "
+ "Adlink PCI-7841/cPCI-7841 SE, "
+ "Marathon CAN-bus-PCI, "
+ "TEWS TECHNOLOGIES TPMC810");
+MODULE_LICENSE("GPL v2");
+
+#define PLX_PCI_MAX_CHAN 2
+
+struct plx_pci_card {
+ int channels; /* detected channels count */
+ struct net_device *net_dev[PLX_PCI_MAX_CHAN];
+ void __iomem *conf_addr;
+};
+
+#define PLX_PCI_CAN_CLOCK (16000000 / 2)
+
+/* PLX90xx registers */
+#define PLX_INTCSR 0x4c /* Interrupt Control/Status */
+#define PLX_CNTRL 0x50 /* User I/O, Direct Slave Response,
+ * Serial EEPROM, and Initialization
+ * Control register
+ */
+
+#define PLX_LINT1_EN 0x1 /* Local interrupt 1 enable */
+#define PLX_LINT2_EN (1 << 3) /* Local interrupt 2 enable */
+#define PLX_PCI_INT_EN (1 << 6) /* PCI Interrupt Enable */
+#define PLX_PCI_RESET (1 << 30) /* PCI Adapter Software Reset */
+
+/*
+ * The board configuration is probably following:
+ * RX1 is connected to ground.
+ * TX1 is not connected.
+ * CLKO is not connected.
+ * Setting the OCR register to 0xDA is a good idea.
+ * This means normal output mode, push-pull and the correct polarity.
+ */
+#define PLX_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
+
+/*
+ * In the CDR register, you should set CBP to 1.
+ * You will probably also want to set the clock divider value to 7
+ * (meaning direct oscillator output) because the second SJA1000 chip
+ * is driven by the first one CLKOUT output.
+ */
+#define PLX_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
+
+/* SJA1000 Control Register in the BasicCAN Mode */
+#define REG_CR 0x00
+
+/* States of some SJA1000 registers after hardware reset in the BasicCAN mode*/
+#define REG_CR_BASICCAN_INITIAL 0x21
+#define REG_CR_BASICCAN_INITIAL_MASK 0xa1
+#define REG_SR_BASICCAN_INITIAL 0x0c
+#define REG_IR_BASICCAN_INITIAL 0xe0
+
+/* States of some SJA1000 registers after hardware reset in the PeliCAN mode*/
+#define REG_MOD_PELICAN_INITIAL 0x01
+#define REG_SR_PELICAN_INITIAL 0x3c
+#define REG_IR_PELICAN_INITIAL 0x00
+
+#define ADLINK_PCI_VENDOR_ID 0x144A
+#define ADLINK_PCI_DEVICE_ID 0x7841
+
+#define MARATHON_PCI_DEVICE_ID 0x2715
+
+#define TEWS_PCI_VENDOR_ID 0x1498
+#define TEWS_PCI_DEVICE_ID_TMPC810 0x032A
+
+static void plx_pci_reset_common(struct pci_dev *pdev);
+static void plx_pci_reset_marathon(struct pci_dev *pdev);
+
+struct plx_pci_channel_map {
+ u32 bar;
+ u32 offset;
+ u32 size; /* 0x00 - auto, e.g. length of entire bar */
+};
+
+struct plx_pci_card_info {
+ const char *name;
+ int channel_count;
+ u32 can_clock;
+ u8 ocr; /* output control register */
+ u8 cdr; /* clock divider register */
+
+ /* Parameters for mapping local configuration space */
+ struct plx_pci_channel_map conf_map;
+
+ /* Parameters for mapping the SJA1000 chips */
+ struct plx_pci_channel_map chan_map_tbl[PLX_PCI_MAX_CHAN];
+
+ /* Pointer to device-dependent reset function */
+ void (*reset_func)(struct pci_dev *pdev);
+};
+
+static struct plx_pci_card_info plx_pci_card_info_adlink __devinitdata = {
+ "Adlink PCI-7841/cPCI-7841", 2,
+ PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
+ {1, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x80, 0x80} },
+ &plx_pci_reset_common
+ /* based on PLX9052 */
+};
+
+static struct plx_pci_card_info plx_pci_card_info_adlink_se __devinitdata = {
+ "Adlink PCI-7841/cPCI-7841 SE", 2,
+ PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
+ {0, 0x00, 0x00}, { {2, 0x00, 0x80}, {2, 0x80, 0x80} },
+ &plx_pci_reset_common
+ /* based on PLX9052 */
+};
+
+static struct plx_pci_card_info plx_pci_card_info_marathon __devinitdata = {
+ "Marathon CAN-bus-PCI", 2,
+ PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
+ {0, 0x00, 0x00}, { {2, 0x00, 0x00}, {4, 0x00, 0x00} },
+ &plx_pci_reset_marathon
+ /* based on PLX9052 */
+};
+
+static struct plx_pci_card_info plx_pci_card_info_tews __devinitdata = {
+ "TEWS TECHNOLOGIES TPMC810", 2,
+ PLX_PCI_CAN_CLOCK, PLX_PCI_OCR, PLX_PCI_CDR,
+ {0, 0x00, 0x00}, { {2, 0x000, 0x80}, {2, 0x100, 0x80} },
+ &plx_pci_reset_common
+ /* based on PLX9030 */
+};
+
+static DEFINE_PCI_DEVICE_TABLE(plx_pci_tbl) = {
+ {
+ /* Adlink PCI-7841/cPCI-7841 */
+ ADLINK_PCI_VENDOR_ID, ADLINK_PCI_DEVICE_ID,
+ PCI_ANY_ID, PCI_ANY_ID,
+ PCI_CLASS_NETWORK_OTHER << 8, ~0,
+ (kernel_ulong_t)&plx_pci_card_info_adlink
+ },
+ {
+ /* Adlink PCI-7841/cPCI-7841 SE */
+ ADLINK_PCI_VENDOR_ID, ADLINK_PCI_DEVICE_ID,
+ PCI_ANY_ID, PCI_ANY_ID,
+ PCI_CLASS_COMMUNICATION_OTHER << 8, ~0,
+ (kernel_ulong_t)&plx_pci_card_info_adlink_se
+ },
+ {
+ /* Marathon CAN-bus-PCI card */
+ PCI_VENDOR_ID_PLX, MARATHON_PCI_DEVICE_ID,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&plx_pci_card_info_marathon
+ },
+ {
+ /* TEWS TECHNOLOGIES TPMC810 card */
+ TEWS_PCI_VENDOR_ID, TEWS_PCI_DEVICE_ID_TMPC810,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ (kernel_ulong_t)&plx_pci_card_info_tews
+ },
+ { 0,}
+};
+MODULE_DEVICE_TABLE(pci, plx_pci_tbl);
+
+static u8 plx_pci_read_reg(const struct sja1000_priv *priv, int port)
+{
+ return ioread8(priv->reg_base + port);
+}
+
+static void plx_pci_write_reg(const struct sja1000_priv *priv, int port, u8 val)
+{
+ iowrite8(val, priv->reg_base + port);
+}
+
+/*
+ * Check if a CAN controller is present at the specified location
+ * by trying to switch 'em from the Basic mode into the PeliCAN mode.
+ * Also check states of some registers in reset mode.
+ */
+static inline int plx_pci_check_sja1000(const struct sja1000_priv *priv)
+{
+ int flag = 0;
+
+ /*
+ * Check registers after hardware reset (the Basic mode)
+ * See states on p. 10 of the Datasheet.
+ */
+ if ((priv->read_reg(priv, REG_CR) & REG_CR_BASICCAN_INITIAL_MASK) ==
+ REG_CR_BASICCAN_INITIAL &&
+ (priv->read_reg(priv, REG_SR) == REG_SR_BASICCAN_INITIAL) &&
+ (priv->read_reg(priv, REG_IR) == REG_IR_BASICCAN_INITIAL))
+ flag = 1;
+
+ /* Bring the SJA1000 into the PeliCAN mode*/
+ priv->write_reg(priv, REG_CDR, CDR_PELICAN);
+
+ /*
+ * Check registers after reset in the PeliCAN mode.
+ * See states on p. 23 of the Datasheet.
+ */
+ if (priv->read_reg(priv, REG_MOD) == REG_MOD_PELICAN_INITIAL &&
+ priv->read_reg(priv, REG_SR) == REG_SR_PELICAN_INITIAL &&
+ priv->read_reg(priv, REG_IR) == REG_IR_PELICAN_INITIAL)
+ return flag;
+
+ return 0;
+}
+
+/*
+ * PLX90xx software reset
+ * Also LRESET# asserts and brings to reset device on the Local Bus (if wired).
+ * For most cards it's enough for reset the SJA1000 chips.
+ */
+static void plx_pci_reset_common(struct pci_dev *pdev)
+{
+ struct plx_pci_card *card = pci_get_drvdata(pdev);
+ u32 cntrl;
+
+ cntrl = ioread32(card->conf_addr + PLX_CNTRL);
+ cntrl |= PLX_PCI_RESET;
+ iowrite32(cntrl, card->conf_addr + PLX_CNTRL);
+ udelay(100);
+ cntrl ^= PLX_PCI_RESET;
+ iowrite32(cntrl, card->conf_addr + PLX_CNTRL);
+};
+
+/* Special reset function for Marathon card */
+static void plx_pci_reset_marathon(struct pci_dev *pdev)
+{
+ void __iomem *reset_addr;
+ int i;
+ int reset_bar[2] = {3, 5};
+
+ plx_pci_reset_common(pdev);
+
+ for (i = 0; i < 2; i++) {
+ reset_addr = pci_iomap(pdev, reset_bar[i], 0);
+ if (!reset_addr) {
+ dev_err(&pdev->dev, "Failed to remap reset "
+ "space %d (BAR%d)\n", i, reset_bar[i]);
+ } else {
+ /* reset the SJA1000 chip */
+ iowrite8(0x1, reset_addr);
+ udelay(100);
+ pci_iounmap(pdev, reset_addr);
+ }
+ }
+}
+
+static void plx_pci_del_card(struct pci_dev *pdev)
+{
+ struct plx_pci_card *card = pci_get_drvdata(pdev);
+ struct net_device *dev;
+ struct sja1000_priv *priv;
+ int i = 0;
+
+ for (i = 0; i < card->channels; i++) {
+ dev = card->net_dev[i];
+ if (!dev)
+ continue;
+
+ dev_info(&pdev->dev, "Removing %s\n", dev->name);
+ unregister_sja1000dev(dev);
+ priv = netdev_priv(dev);
+ if (priv->reg_base)
+ pci_iounmap(pdev, priv->reg_base);
+ free_sja1000dev(dev);
+ }
+
+ plx_pci_reset_common(pdev);
+
+ /*
+ * Disable interrupts from PCI-card (PLX90xx) and disable Local_1,
+ * Local_2 interrupts
+ */
+ iowrite32(0x0, card->conf_addr + PLX_INTCSR);
+
+ if (card->conf_addr)
+ pci_iounmap(pdev, card->conf_addr);
+
+ kfree(card);
+
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+}
+
+/*
+ * Probe PLX90xx based device for the SJA1000 chips and register each
+ * available CAN channel to SJA1000 Socket-CAN subsystem.
+ */
+static int __devinit plx_pci_add_card(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct sja1000_priv *priv;
+ struct net_device *dev;
+ struct plx_pci_card *card;
+ struct plx_pci_card_info *ci;
+ int err, i;
+ u32 val;
+ void __iomem *addr;
+
+ ci = (struct plx_pci_card_info *)ent->driver_data;
+
+ if (pci_enable_device(pdev) < 0) {
+ dev_err(&pdev->dev, "Failed to enable PCI device\n");
+ return -ENODEV;
+ }
+
+ dev_info(&pdev->dev, "Detected \"%s\" card at slot #%i\n",
+ ci->name, PCI_SLOT(pdev->devfn));
+
+ /* Allocate card structures to hold addresses, ... */
+ card = kzalloc(sizeof(*card), GFP_KERNEL);
+ if (!card) {
+ dev_err(&pdev->dev, "Unable to allocate memory\n");
+ pci_disable_device(pdev);
+ return -ENOMEM;
+ }
+
+ pci_set_drvdata(pdev, card);
+
+ card->channels = 0;
+
+ /* Remap PLX90xx configuration space */
+ addr = pci_iomap(pdev, ci->conf_map.bar, ci->conf_map.size);
+ if (!addr) {
+ err = -ENOMEM;
+ dev_err(&pdev->dev, "Failed to remap configuration space "
+ "(BAR%d)\n", ci->conf_map.bar);
+ goto failure_cleanup;
+ }
+ card->conf_addr = addr + ci->conf_map.offset;
+
+ ci->reset_func(pdev);
+
+ /* Detect available channels */
+ for (i = 0; i < ci->channel_count; i++) {
+ struct plx_pci_channel_map *cm = &ci->chan_map_tbl[i];
+
+ dev = alloc_sja1000dev(0);
+ if (!dev) {
+ err = -ENOMEM;
+ goto failure_cleanup;
+ }
+
+ card->net_dev[i] = dev;
+ priv = netdev_priv(dev);
+ priv->priv = card;
+ priv->irq_flags = IRQF_SHARED;
+
+ dev->irq = pdev->irq;
+
+ /*
+ * Remap IO space of the SJA1000 chips
+ * This is device-dependent mapping
+ */
+ addr = pci_iomap(pdev, cm->bar, cm->size);
+ if (!addr) {
+ err = -ENOMEM;
+ dev_err(&pdev->dev, "Failed to remap BAR%d\n", cm->bar);
+ goto failure_cleanup;
+ }
+
+ priv->reg_base = addr + cm->offset;
+ priv->read_reg = plx_pci_read_reg;
+ priv->write_reg = plx_pci_write_reg;
+
+ /* Check if channel is present */
+ if (plx_pci_check_sja1000(priv)) {
+ priv->can.clock.freq = ci->can_clock;
+ priv->ocr = ci->ocr;
+ priv->cdr = ci->cdr;
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ /* Register SJA1000 device */
+ err = register_sja1000dev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "Registering device failed "
+ "(err=%d)\n", err);
+ free_sja1000dev(dev);
+ goto failure_cleanup;
+ }
+
+ card->channels++;
+
+ dev_info(&pdev->dev, "Channel #%d at 0x%p, irq %d "
+ "registered as %s\n", i + 1, priv->reg_base,
+ dev->irq, dev->name);
+ } else {
+ dev_err(&pdev->dev, "Channel #%d not detected\n",
+ i + 1);
+ free_sja1000dev(dev);
+ }
+ }
+
+ if (!card->channels) {
+ err = -ENODEV;
+ goto failure_cleanup;
+ }
+
+ /*
+ * Enable interrupts from PCI-card (PLX90xx) and enable Local_1,
+ * Local_2 interrupts from the SJA1000 chips
+ */
+ val = ioread32(card->conf_addr + PLX_INTCSR);
+ val |= PLX_LINT1_EN | PLX_LINT2_EN | PLX_PCI_INT_EN;
+ iowrite32(val, card->conf_addr + PLX_INTCSR);
+
+ return 0;
+
+failure_cleanup:
+ dev_err(&pdev->dev, "Error: %d. Cleaning Up.\n", err);
+
+ plx_pci_del_card(pdev);
+
+ return err;
+}
+
+static struct pci_driver plx_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = plx_pci_tbl,
+ .probe = plx_pci_add_card,
+ .remove = plx_pci_del_card,
+};
+
+static int __init plx_pci_init(void)
+{
+ return pci_register_driver(&plx_pci_driver);
+}
+
+static void __exit plx_pci_exit(void)
+{
+ pci_unregister_driver(&plx_pci_driver);
+}
+
+module_init(plx_pci_init);
+module_exit(plx_pci_exit);
diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
index 542a4f7255b4..145b1a731a53 100644
--- a/drivers/net/can/sja1000/sja1000.c
+++ b/drivers/net/can/sja1000/sja1000.c
@@ -130,8 +130,12 @@ static void set_normal_mode(struct net_device *dev)
/* check reset bit */
if ((status & MOD_RM) == 0) {
priv->can.state = CAN_STATE_ERROR_ACTIVE;
- /* enable all interrupts */
- priv->write_reg(priv, REG_IER, IRQ_ALL);
+ /* enable interrupts */
+ if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
+ priv->write_reg(priv, REG_IER, IRQ_ALL);
+ else
+ priv->write_reg(priv, REG_IER,
+ IRQ_ALL & ~IRQ_BEI);
return;
}
@@ -203,6 +207,17 @@ static int sja1000_set_bittiming(struct net_device *dev)
return 0;
}
+static int sja1000_get_berr_counter(const struct net_device *dev,
+ struct can_berr_counter *bec)
+{
+ struct sja1000_priv *priv = netdev_priv(dev);
+
+ bec->txerr = priv->read_reg(priv, REG_TXERR);
+ bec->rxerr = priv->read_reg(priv, REG_RXERR);
+
+ return 0;
+}
+
/*
* initialize SJA1000 chip:
* - reset chip
@@ -249,6 +264,9 @@ static netdev_tx_t sja1000_start_xmit(struct sk_buff *skb,
uint8_t dreg;
int i;
+ if (can_dropped_invalid_skb(dev, skb))
+ return NETDEV_TX_OK;
+
netif_stop_queue(dev);
fi = dlc = cf->can_dlc;
@@ -434,6 +452,8 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
CAN_ERR_CRTL_TX_PASSIVE :
CAN_ERR_CRTL_RX_PASSIVE;
}
+ cf->data[6] = txerr;
+ cf->data[7] = rxerr;
}
priv->can.state = state;
@@ -564,6 +584,9 @@ struct net_device *alloc_sja1000dev(int sizeof_priv)
priv->can.bittiming_const = &sja1000_bittiming_const;
priv->can.do_set_bittiming = sja1000_set_bittiming;
priv->can.do_set_mode = sja1000_set_mode;
+ priv->can.do_get_berr_counter = sja1000_get_berr_counter;
+ priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
+ CAN_CTRLMODE_BERR_REPORTING;
if (sizeof_priv)
priv->priv = (void *)priv + sizeof(struct sja1000_priv);
diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index 5c993c2da528..0c3d2ba0d178 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -28,9 +28,11 @@
* .mbx_offset = 0x2000,
* .int_line = 0,
* .revision = 1,
+ * .transceiver_switch = hecc_phy_control,
* };
*
- * Please see include/can/platform/ti_hecc.h for description of above fields
+ * Please see include/linux/can/platform/ti_hecc.h for description of
+ * above fields.
*
*/
@@ -220,6 +222,7 @@ struct ti_hecc_priv {
u32 tx_head;
u32 tx_tail;
u32 rx_next;
+ void (*transceiver_switch)(int);
};
static inline int get_tx_head_mb(struct ti_hecc_priv *priv)
@@ -317,6 +320,13 @@ static int ti_hecc_set_btc(struct ti_hecc_priv *priv)
return 0;
}
+static void ti_hecc_transceiver_switch(const struct ti_hecc_priv *priv,
+ int on)
+{
+ if (priv->transceiver_switch)
+ priv->transceiver_switch(on);
+}
+
static void ti_hecc_reset(struct net_device *ndev)
{
u32 cnt;
@@ -477,6 +487,9 @@ static netdev_tx_t ti_hecc_xmit(struct sk_buff *skb, struct net_device *ndev)
u32 mbxno, mbx_mask, data;
unsigned long flags;
+ if (can_dropped_invalid_skb(ndev, skb))
+ return NETDEV_TX_OK;
+
mbxno = get_tx_head_mb(priv);
mbx_mask = BIT(mbxno);
spin_lock_irqsave(&priv->mbx_lock, flags);
@@ -491,7 +504,6 @@ static netdev_tx_t ti_hecc_xmit(struct sk_buff *skb, struct net_device *ndev)
spin_unlock_irqrestore(&priv->mbx_lock, flags);
/* Prepare mailbox for transmission */
- data = min_t(u8, cf->can_dlc, 8);
if (cf->can_id & CAN_RTR_FLAG) /* Remote transmission request */
data |= HECC_CANMCF_RTR;
data |= get_tx_head_prio(priv) << 8;
@@ -816,15 +828,17 @@ static int ti_hecc_open(struct net_device *ndev)
return err;
}
+ ti_hecc_transceiver_switch(priv, 1);
+
/* Open common can device */
err = open_candev(ndev);
if (err) {
dev_err(ndev->dev.parent, "open_candev() failed %d\n", err);
+ ti_hecc_transceiver_switch(priv, 0);
free_irq(ndev->irq, ndev);
return err;
}
- clk_enable(priv->clk);
ti_hecc_start(ndev);
napi_enable(&priv->napi);
netif_start_queue(ndev);
@@ -840,8 +854,8 @@ static int ti_hecc_close(struct net_device *ndev)
napi_disable(&priv->napi);
ti_hecc_stop(ndev);
free_irq(ndev->irq, ndev);
- clk_disable(priv->clk);
close_candev(ndev);
+ ti_hecc_transceiver_switch(priv, 0);
return 0;
}
@@ -903,10 +917,12 @@ static int ti_hecc_probe(struct platform_device *pdev)
priv->hecc_ram_offset = pdata->hecc_ram_offset;
priv->mbx_offset = pdata->mbx_offset;
priv->int_line = pdata->int_line;
+ priv->transceiver_switch = pdata->transceiver_switch;
priv->can.bittiming_const = &ti_hecc_bittiming_const;
priv->can.do_set_mode = ti_hecc_do_set_mode;
priv->can.do_get_state = ti_hecc_get_state;
+ priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
ndev->irq = irq->start;
ndev->flags |= IFF_ECHO;
@@ -925,6 +941,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
netif_napi_add(ndev, &priv->napi, ti_hecc_rx_poll,
HECC_DEF_NAPI_WEIGHT);
+ clk_enable(priv->clk);
err = register_candev(ndev);
if (err) {
dev_err(&pdev->dev, "register_candev() failed\n");
@@ -953,6 +970,7 @@ static int __devexit ti_hecc_remove(struct platform_device *pdev)
struct net_device *ndev = platform_get_drvdata(pdev);
struct ti_hecc_priv *priv = netdev_priv(ndev);
+ clk_disable(priv->clk);
clk_put(priv->clk);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
iounmap(priv->base);
@@ -964,6 +982,48 @@ static int __devexit ti_hecc_remove(struct platform_device *pdev)
return 0;
}
+
+#ifdef CONFIG_PM
+static int ti_hecc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct ti_hecc_priv *priv = netdev_priv(dev);
+
+ if (netif_running(dev)) {
+ netif_stop_queue(dev);
+ netif_device_detach(dev);
+ }
+
+ hecc_set_bit(priv, HECC_CANMC, HECC_CANMC_PDR);
+ priv->can.state = CAN_STATE_SLEEPING;
+
+ clk_disable(priv->clk);
+
+ return 0;
+}
+
+static int ti_hecc_resume(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct ti_hecc_priv *priv = netdev_priv(dev);
+
+ clk_enable(priv->clk);
+
+ hecc_clear_bit(priv, HECC_CANMC, HECC_CANMC_PDR);
+ priv->can.state = CAN_STATE_ERROR_ACTIVE;
+
+ if (netif_running(dev)) {
+ netif_device_attach(dev);
+ netif_start_queue(dev);
+ }
+
+ return 0;
+}
+#else
+#define ti_hecc_suspend NULL
+#define ti_hecc_resume NULL
+#endif
+
/* TI HECC netdevice driver: platform driver structure */
static struct platform_driver ti_hecc_driver = {
.driver = {
@@ -972,6 +1032,8 @@ static struct platform_driver ti_hecc_driver = {
},
.probe = ti_hecc_probe,
.remove = __devexit_p(ti_hecc_remove),
+ .suspend = ti_hecc_suspend,
+ .resume = ti_hecc_resume,
};
static int __init ti_hecc_init_driver(void)
@@ -979,14 +1041,15 @@ static int __init ti_hecc_init_driver(void)
printk(KERN_INFO DRV_DESC "\n");
return platform_driver_register(&ti_hecc_driver);
}
-module_init(ti_hecc_init_driver);
static void __exit ti_hecc_exit_driver(void)
{
printk(KERN_INFO DRV_DESC " unloaded\n");
platform_driver_unregister(&ti_hecc_driver);
}
+
module_exit(ti_hecc_exit_driver);
+module_init(ti_hecc_init_driver);
MODULE_AUTHOR("Anant Gole <anantgole@ti.com>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/can/usb/Kconfig b/drivers/net/can/usb/Kconfig
index bbc78e0b8a15..97ff6febad63 100644
--- a/drivers/net/can/usb/Kconfig
+++ b/drivers/net/can/usb/Kconfig
@@ -5,6 +5,6 @@ config CAN_EMS_USB
tristate "EMS CPC-USB/ARM7 CAN/USB interface"
---help---
This driver is for the one channel CPC-USB/ARM7 CAN/USB interface
- from from EMS Dr. Thomas Wuensche (http://www.ems-wuensche.de).
+ from EMS Dr. Thomas Wuensche (http://www.ems-wuensche.de).
endmenu
diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c
index efbb05c71bf4..11c87840cc00 100644
--- a/drivers/net/can/usb/ems_usb.c
+++ b/drivers/net/can/usb/ems_usb.c
@@ -767,6 +767,9 @@ static netdev_tx_t ems_usb_start_xmit(struct sk_buff *skb, struct net_device *ne
size_t size = CPC_HEADER_SIZE + CPC_MSG_HEADER_LEN
+ sizeof(struct cpc_can_msg);
+ if (can_dropped_invalid_skb(netdev, skb))
+ return NETDEV_TX_OK;
+
/* create a URB, and a buffer for it, and copy the data to the URB */
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
@@ -1019,8 +1022,7 @@ static int ems_usb_probe(struct usb_interface *intf,
dev->can.bittiming_const = &ems_usb_bittiming_const;
dev->can.do_set_bittiming = ems_usb_set_bittiming;
dev->can.do_set_mode = ems_usb_set_mode;
-
- netdev->flags |= IFF_ECHO; /* we support local echo */
+ dev->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
netdev->netdev_ops = &ems_usb_netdev_ops;
diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c
index 80ac56313981..d124d837ae58 100644
--- a/drivers/net/can/vcan.c
+++ b/drivers/net/can/vcan.c
@@ -47,6 +47,7 @@
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/can.h>
+#include <linux/can/dev.h>
#include <net/rtnetlink.h>
static __initdata const char banner[] =
@@ -70,10 +71,11 @@ MODULE_PARM_DESC(echo, "Echo sent frames (for testing). Default: 0 (Off)");
static void vcan_rx(struct sk_buff *skb, struct net_device *dev)
{
+ struct can_frame *cf = (struct can_frame *)skb->data;
struct net_device_stats *stats = &dev->stats;
stats->rx_packets++;
- stats->rx_bytes += skb->len;
+ stats->rx_bytes += cf->can_dlc;
skb->protocol = htons(ETH_P_CAN);
skb->pkt_type = PACKET_BROADCAST;
@@ -85,11 +87,15 @@ static void vcan_rx(struct sk_buff *skb, struct net_device *dev)
static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev)
{
+ struct can_frame *cf = (struct can_frame *)skb->data;
struct net_device_stats *stats = &dev->stats;
int loop;
+ if (can_dropped_invalid_skb(dev, skb))
+ return NETDEV_TX_OK;
+
stats->tx_packets++;
- stats->tx_bytes += skb->len;
+ stats->tx_bytes += cf->can_dlc;
/* set flag whether this packet has to be looped back */
loop = skb->pkt_type == PACKET_LOOPBACK;
@@ -103,7 +109,7 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev)
* CAN core already did the echo for us
*/
stats->rx_packets++;
- stats->rx_bytes += skb->len;
+ stats->rx_bytes += cf->can_dlc;
}
kfree_skb(skb);
return NETDEV_TX_OK;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.