summaryrefslogtreecommitdiffstats
path: root/drivers/net/can
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/can')
-rw-r--r--drivers/net/can/at91_can.c2
-rw-r--r--drivers/net/can/bfin_can.c4
-rw-r--r--drivers/net/can/c_can/Kconfig20
-rw-r--r--drivers/net/can/c_can/Makefile1
-rw-r--r--drivers/net/can/c_can/c_can.c122
-rw-r--r--drivers/net/can/c_can/c_can.h163
-rw-r--r--drivers/net/can/c_can/c_can_pci.c221
-rw-r--r--drivers/net/can/c_can/c_can_platform.c76
-rw-r--r--drivers/net/can/cc770/cc770.c4
-rw-r--r--drivers/net/can/dev.c37
-rw-r--r--drivers/net/can/flexcan.c154
-rw-r--r--drivers/net/can/janz-ican3.c241
-rw-r--r--drivers/net/can/mcp251x.c5
-rw-r--r--drivers/net/can/mscan/mpc5xxx_can.c2
-rw-r--r--drivers/net/can/mscan/mscan.c2
-rw-r--r--drivers/net/can/pch_can.c2
-rw-r--r--drivers/net/can/sja1000/sja1000.c2
-rw-r--r--drivers/net/can/softing/softing_main.c2
-rw-r--r--drivers/net/can/ti_hecc.c2
-rw-r--r--drivers/net/can/usb/ems_usb.c2
-rw-r--r--drivers/net/can/usb/esd_usb2.c2
-rw-r--r--drivers/net/can/usb/peak_usb/pcan_usb_core.h2
-rw-r--r--drivers/net/can/vcan.c27
23 files changed, 853 insertions, 242 deletions
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 6ea905c2cf6d..fcff73a73b1d 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -170,7 +170,7 @@ static const struct at91_devtype_data at91_devtype_data[] __devinitconst = {
},
};
-static struct can_bittiming_const at91_bittiming_const = {
+static const struct can_bittiming_const at91_bittiming_const = {
.name = KBUILD_MODNAME,
.tseg1_min = 4,
.tseg1_max = 16,
diff --git a/drivers/net/can/bfin_can.c b/drivers/net/can/bfin_can.c
index 3f88473423e9..f2d6d258a286 100644
--- a/drivers/net/can/bfin_can.c
+++ b/drivers/net/can/bfin_can.c
@@ -44,7 +44,7 @@ struct bfin_can_priv {
/*
* bfin can timing parameters
*/
-static struct can_bittiming_const bfin_can_bittiming_const = {
+static const struct can_bittiming_const bfin_can_bittiming_const = {
.name = DRV_NAME,
.tseg1_min = 1,
.tseg1_max = 16,
@@ -597,7 +597,7 @@ static int __devinit bfin_can_probe(struct platform_device *pdev)
dev_info(&pdev->dev,
"%s device registered"
"(&reg_base=%p, rx_irq=%d, tx_irq=%d, err_irq=%d, sclk=%d)\n",
- DRV_NAME, (void *)priv->membase, priv->rx_irq,
+ DRV_NAME, priv->membase, priv->rx_irq,
priv->tx_irq, priv->err_irq, priv->can.clock.freq);
return 0;
diff --git a/drivers/net/can/c_can/Kconfig b/drivers/net/can/c_can/Kconfig
index ffb9773d102d..3b83bafcd947 100644
--- a/drivers/net/can/c_can/Kconfig
+++ b/drivers/net/can/c_can/Kconfig
@@ -1,15 +1,23 @@
menuconfig CAN_C_CAN
- tristate "Bosch C_CAN devices"
+ tristate "Bosch C_CAN/D_CAN devices"
depends on CAN_DEV && HAS_IOMEM
if CAN_C_CAN
config CAN_C_CAN_PLATFORM
- tristate "Generic Platform Bus based C_CAN driver"
+ tristate "Generic Platform Bus based C_CAN/D_CAN driver"
---help---
- This driver adds support for the C_CAN chips connected to
- the "platform bus" (Linux abstraction for directly to the
+ This driver adds support for the C_CAN/D_CAN chips connected
+ to the "platform bus" (Linux abstraction for directly to the
processor attached devices) which can be found on various
- boards from ST Microelectronics (http://www.st.com)
- like the SPEAr1310 and SPEAr320 evaluation boards.
+ boards from ST Microelectronics (http://www.st.com) like the
+ SPEAr1310 and SPEAr320 evaluation boards & TI (www.ti.com)
+ boards like am335x, dm814x, dm813x and dm811x.
+
+config CAN_C_CAN_PCI
+ tristate "Generic PCI Bus based C_CAN/D_CAN driver"
+ depends on PCI
+ ---help---
+ This driver adds support for the C_CAN/D_CAN chips connected
+ to the PCI bus.
endif
diff --git a/drivers/net/can/c_can/Makefile b/drivers/net/can/c_can/Makefile
index 9273f6d5c4b7..ad1cc842170a 100644
--- a/drivers/net/can/c_can/Makefile
+++ b/drivers/net/can/c_can/Makefile
@@ -4,5 +4,6 @@
obj-$(CONFIG_CAN_C_CAN) += c_can.o
obj-$(CONFIG_CAN_C_CAN_PLATFORM) += c_can_platform.o
+obj-$(CONFIG_CAN_C_CAN_PCI) += c_can_pci.o
ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
index 86cd532c78f9..4c538e388655 100644
--- a/drivers/net/can/c_can/c_can.c
+++ b/drivers/net/can/c_can/c_can.c
@@ -41,6 +41,10 @@
#include "c_can.h"
+/* Number of interface registers */
+#define IF_ENUM_REG_LEN 11
+#define C_CAN_IFACE(reg, iface) (C_CAN_IF1_##reg + (iface) * IF_ENUM_REG_LEN)
+
/* control register */
#define CONTROL_TEST BIT(7)
#define CONTROL_CCE BIT(6)
@@ -185,7 +189,7 @@ enum c_can_bus_error_types {
C_CAN_ERROR_PASSIVE,
};
-static struct can_bittiming_const c_can_bittiming_const = {
+static const struct can_bittiming_const c_can_bittiming_const = {
.name = KBUILD_MODNAME,
.tseg1_min = 2, /* Time segment 1 = prop_seg + phase_seg1 */
.tseg1_max = 16,
@@ -209,10 +213,10 @@ static inline int get_tx_echo_msg_obj(const struct c_can_priv *priv)
C_CAN_MSG_OBJ_TX_FIRST;
}
-static u32 c_can_read_reg32(struct c_can_priv *priv, void *reg)
+static u32 c_can_read_reg32(struct c_can_priv *priv, enum reg index)
{
- u32 val = priv->read_reg(priv, reg);
- val |= ((u32) priv->read_reg(priv, reg + 2)) << 16;
+ u32 val = priv->read_reg(priv, index);
+ val |= ((u32) priv->read_reg(priv, index + 1)) << 16;
return val;
}
@@ -220,14 +224,14 @@ static void c_can_enable_all_interrupts(struct c_can_priv *priv,
int enable)
{
unsigned int cntrl_save = priv->read_reg(priv,
- &priv->regs->control);
+ C_CAN_CTRL_REG);
if (enable)
cntrl_save |= (CONTROL_SIE | CONTROL_EIE | CONTROL_IE);
else
cntrl_save &= ~(CONTROL_EIE | CONTROL_IE | CONTROL_SIE);
- priv->write_reg(priv, &priv->regs->control, cntrl_save);
+ priv->write_reg(priv, C_CAN_CTRL_REG, cntrl_save);
}
static inline int c_can_msg_obj_is_busy(struct c_can_priv *priv, int iface)
@@ -235,7 +239,7 @@ static inline int c_can_msg_obj_is_busy(struct c_can_priv *priv, int iface)
int count = MIN_TIMEOUT_VALUE;
while (count && priv->read_reg(priv,
- &priv->regs->ifregs[iface].com_req) &
+ C_CAN_IFACE(COMREQ_REG, iface)) &
IF_COMR_BUSY) {
count--;
udelay(1);
@@ -258,9 +262,9 @@ static inline void c_can_object_get(struct net_device *dev,
* register and message RAM must be complete in 6 CAN-CLK
* period.
*/
- priv->write_reg(priv, &priv->regs->ifregs[iface].com_mask,
+ priv->write_reg(priv, C_CAN_IFACE(COMMSK_REG, iface),
IFX_WRITE_LOW_16BIT(mask));
- priv->write_reg(priv, &priv->regs->ifregs[iface].com_req,
+ priv->write_reg(priv, C_CAN_IFACE(COMREQ_REG, iface),
IFX_WRITE_LOW_16BIT(objno));
if (c_can_msg_obj_is_busy(priv, iface))
@@ -278,9 +282,9 @@ static inline void c_can_object_put(struct net_device *dev,
* register and message RAM must be complete in 6 CAN-CLK
* period.
*/
- priv->write_reg(priv, &priv->regs->ifregs[iface].com_mask,
+ priv->write_reg(priv, C_CAN_IFACE(COMMSK_REG, iface),
(IF_COMM_WR | IFX_WRITE_LOW_16BIT(mask)));
- priv->write_reg(priv, &priv->regs->ifregs[iface].com_req,
+ priv->write_reg(priv, C_CAN_IFACE(COMREQ_REG, iface),
IFX_WRITE_LOW_16BIT(objno));
if (c_can_msg_obj_is_busy(priv, iface))
@@ -306,18 +310,18 @@ static void c_can_write_msg_object(struct net_device *dev,
flags |= IF_ARB_MSGVAL;
- priv->write_reg(priv, &priv->regs->ifregs[iface].arb1,
+ priv->write_reg(priv, C_CAN_IFACE(ARB1_REG, iface),
IFX_WRITE_LOW_16BIT(id));
- priv->write_reg(priv, &priv->regs->ifregs[iface].arb2, flags |
+ priv->write_reg(priv, C_CAN_IFACE(ARB2_REG, iface), flags |
IFX_WRITE_HIGH_16BIT(id));
for (i = 0; i < frame->can_dlc; i += 2) {
- priv->write_reg(priv, &priv->regs->ifregs[iface].data[i / 2],
+ priv->write_reg(priv, C_CAN_IFACE(DATA1_REG, iface) + i / 2,
frame->data[i] | (frame->data[i + 1] << 8));
}
/* enable interrupt for this message object */
- priv->write_reg(priv, &priv->regs->ifregs[iface].msg_cntrl,
+ priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface),
IF_MCONT_TXIE | IF_MCONT_TXRQST | IF_MCONT_EOB |
frame->can_dlc);
c_can_object_put(dev, iface, objno, IF_COMM_ALL);
@@ -329,7 +333,7 @@ static inline void c_can_mark_rx_msg_obj(struct net_device *dev,
{
struct c_can_priv *priv = netdev_priv(dev);
- priv->write_reg(priv, &priv->regs->ifregs[iface].msg_cntrl,
+ priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface),
ctrl_mask & ~(IF_MCONT_MSGLST | IF_MCONT_INTPND));
c_can_object_put(dev, iface, obj, IF_COMM_CONTROL);
@@ -343,7 +347,7 @@ static inline void c_can_activate_all_lower_rx_msg_obj(struct net_device *dev,
struct c_can_priv *priv = netdev_priv(dev);
for (i = C_CAN_MSG_OBJ_RX_FIRST; i <= C_CAN_MSG_RX_LOW_LAST; i++) {
- priv->write_reg(priv, &priv->regs->ifregs[iface].msg_cntrl,
+ priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface),
ctrl_mask & ~(IF_MCONT_MSGLST |
IF_MCONT_INTPND | IF_MCONT_NEWDAT));
c_can_object_put(dev, iface, i, IF_COMM_CONTROL);
@@ -356,7 +360,7 @@ static inline void c_can_activate_rx_msg_obj(struct net_device *dev,
{
struct c_can_priv *priv = netdev_priv(dev);
- priv->write_reg(priv, &priv->regs->ifregs[iface].msg_cntrl,
+ priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface),
ctrl_mask & ~(IF_MCONT_MSGLST |
IF_MCONT_INTPND | IF_MCONT_NEWDAT));
c_can_object_put(dev, iface, obj, IF_COMM_CONTROL);
@@ -374,7 +378,7 @@ static void c_can_handle_lost_msg_obj(struct net_device *dev,
c_can_object_get(dev, iface, objno, IF_COMM_ALL & ~IF_COMM_TXRQST);
- priv->write_reg(priv, &priv->regs->ifregs[iface].msg_cntrl,
+ priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface),
IF_MCONT_CLR_MSGLST);
c_can_object_put(dev, 0, objno, IF_COMM_CONTROL);
@@ -410,8 +414,8 @@ static int c_can_read_msg_object(struct net_device *dev, int iface, int ctrl)
frame->can_dlc = get_can_dlc(ctrl & 0x0F);
- flags = priv->read_reg(priv, &priv->regs->ifregs[iface].arb2);
- val = priv->read_reg(priv, &priv->regs->ifregs[iface].arb1) |
+ flags = priv->read_reg(priv, C_CAN_IFACE(ARB2_REG, iface));
+ val = priv->read_reg(priv, C_CAN_IFACE(ARB1_REG, iface)) |
(flags << 16);
if (flags & IF_ARB_MSGXTD)
@@ -424,7 +428,7 @@ static int c_can_read_msg_object(struct net_device *dev, int iface, int ctrl)
else {
for (i = 0; i < frame->can_dlc; i += 2) {
data = priv->read_reg(priv,
- &priv->regs->ifregs[iface].data[i / 2]);
+ C_CAN_IFACE(DATA1_REG, iface) + i / 2);
frame->data[i] = data;
frame->data[i + 1] = data >> 8;
}
@@ -444,40 +448,40 @@ static void c_can_setup_receive_object(struct net_device *dev, int iface,
{
struct c_can_priv *priv = netdev_priv(dev);
- priv->write_reg(priv, &priv->regs->ifregs[iface].mask1,
+ priv->write_reg(priv, C_CAN_IFACE(MASK1_REG, iface),
IFX_WRITE_LOW_16BIT(mask));
- priv->write_reg(priv, &priv->regs->ifregs[iface].mask2,
+ priv->write_reg(priv, C_CAN_IFACE(MASK2_REG, iface),
IFX_WRITE_HIGH_16BIT(mask));
- priv->write_reg(priv, &priv->regs->ifregs[iface].arb1,
+ priv->write_reg(priv, C_CAN_IFACE(ARB1_REG, iface),
IFX_WRITE_LOW_16BIT(id));
- priv->write_reg(priv, &priv->regs->ifregs[iface].arb2,
+ priv->write_reg(priv, C_CAN_IFACE(ARB2_REG, iface),
(IF_ARB_MSGVAL | IFX_WRITE_HIGH_16BIT(id)));
- priv->write_reg(priv, &priv->regs->ifregs[iface].msg_cntrl, mcont);
+ priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface), mcont);
c_can_object_put(dev, iface, objno, IF_COMM_ALL & ~IF_COMM_TXRQST);
netdev_dbg(dev, "obj no:%d, msgval:0x%08x\n", objno,
- c_can_read_reg32(priv, &priv->regs->msgval1));
+ c_can_read_reg32(priv, C_CAN_MSGVAL1_REG));
}
static void c_can_inval_msg_object(struct net_device *dev, int iface, int objno)
{
struct c_can_priv *priv = netdev_priv(dev);
- priv->write_reg(priv, &priv->regs->ifregs[iface].arb1, 0);
- priv->write_reg(priv, &priv->regs->ifregs[iface].arb2, 0);
- priv->write_reg(priv, &priv->regs->ifregs[iface].msg_cntrl, 0);
+ priv->write_reg(priv, C_CAN_IFACE(ARB1_REG, iface), 0);
+ priv->write_reg(priv, C_CAN_IFACE(ARB2_REG, iface), 0);
+ priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface), 0);
c_can_object_put(dev, iface, objno, IF_COMM_ARB | IF_COMM_CONTROL);
netdev_dbg(dev, "obj no:%d, msgval:0x%08x\n", objno,
- c_can_read_reg32(priv, &priv->regs->msgval1));
+ c_can_read_reg32(priv, C_CAN_MSGVAL1_REG));
}
static inline int c_can_is_next_tx_obj_busy(struct c_can_priv *priv, int objno)
{
- int val = c_can_read_reg32(priv, &priv->regs->txrqst1);
+ int val = c_can_read_reg32(priv, C_CAN_TXRQST1_REG);
/*
* as transmission request register's bit n-1 corresponds to
@@ -540,12 +544,12 @@ static int c_can_set_bittiming(struct net_device *dev)
netdev_info(dev,
"setting BTR=%04x BRPE=%04x\n", reg_btr, reg_brpe);
- ctrl_save = priv->read_reg(priv, &priv->regs->control);
- priv->write_reg(priv, &priv->regs->control,
+ ctrl_save = priv->read_reg(priv, C_CAN_CTRL_REG);
+ priv->write_reg(priv, C_CAN_CTRL_REG,
ctrl_save | CONTROL_CCE | CONTROL_INIT);
- priv->write_reg(priv, &priv->regs->btr, reg_btr);
- priv->write_reg(priv, &priv->regs->brp_ext, reg_brpe);
- priv->write_reg(priv, &priv->regs->control, ctrl_save);
+ priv->write_reg(priv, C_CAN_BTR_REG, reg_btr);
+ priv->write_reg(priv, C_CAN_BRPEXT_REG, reg_brpe);
+ priv->write_reg(priv, C_CAN_CTRL_REG, ctrl_save);
return 0;
}
@@ -587,36 +591,36 @@ static void c_can_chip_config(struct net_device *dev)
struct c_can_priv *priv = netdev_priv(dev);
/* enable automatic retransmission */
- priv->write_reg(priv, &priv->regs->control,
+ priv->write_reg(priv, C_CAN_CTRL_REG,
CONTROL_ENABLE_AR);
if ((priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) &&
(priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)) {
/* loopback + silent mode : useful for hot self-test */
- priv->write_reg(priv, &priv->regs->control, CONTROL_EIE |
+ priv->write_reg(priv, C_CAN_CTRL_REG, CONTROL_EIE |
CONTROL_SIE | CONTROL_IE | CONTROL_TEST);
- priv->write_reg(priv, &priv->regs->test,
+ priv->write_reg(priv, C_CAN_TEST_REG,
TEST_LBACK | TEST_SILENT);
} else if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) {
/* loopback mode : useful for self-test function */
- priv->write_reg(priv, &priv->regs->control, CONTROL_EIE |
+ priv->write_reg(priv, C_CAN_CTRL_REG, CONTROL_EIE |
CONTROL_SIE | CONTROL_IE | CONTROL_TEST);
- priv->write_reg(priv, &priv->regs->test, TEST_LBACK);
+ priv->write_reg(priv, C_CAN_TEST_REG, TEST_LBACK);
} else if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY) {
/* silent mode : bus-monitoring mode */
- priv->write_reg(priv, &priv->regs->control, CONTROL_EIE |
+ priv->write_reg(priv, C_CAN_CTRL_REG, CONTROL_EIE |
CONTROL_SIE | CONTROL_IE | CONTROL_TEST);
- priv->write_reg(priv, &priv->regs->test, TEST_SILENT);
+ priv->write_reg(priv, C_CAN_TEST_REG, TEST_SILENT);
} else
/* normal mode*/
- priv->write_reg(priv, &priv->regs->control,
+ priv->write_reg(priv, C_CAN_CTRL_REG,
CONTROL_EIE | CONTROL_SIE | CONTROL_IE);
/* configure message objects */
c_can_configure_msg_objects(dev);
/* set a `lec` value so that we can check for updates later */
- priv->write_reg(priv, &priv->regs->status, LEC_UNUSED);
+ priv->write_reg(priv, C_CAN_STS_REG, LEC_UNUSED);
/* set bittiming params */
c_can_set_bittiming(dev);
@@ -669,7 +673,7 @@ static int c_can_get_berr_counter(const struct net_device *dev,
unsigned int reg_err_counter;
struct c_can_priv *priv = netdev_priv(dev);
- reg_err_counter = priv->read_reg(priv, &priv->regs->err_cnt);
+ reg_err_counter = priv->read_reg(priv, C_CAN_ERR_CNT_REG);
bec->rxerr = (reg_err_counter & ERR_CNT_REC_MASK) >>
ERR_CNT_REC_SHIFT;
bec->txerr = reg_err_counter & ERR_CNT_TEC_MASK;
@@ -697,12 +701,12 @@ static void c_can_do_tx(struct net_device *dev)
for (/* nix */; (priv->tx_next - priv->tx_echo) > 0; priv->tx_echo++) {
msg_obj_no = get_tx_echo_msg_obj(priv);
- val = c_can_read_reg32(priv, &priv->regs->txrqst1);
+ val = c_can_read_reg32(priv, C_CAN_TXRQST1_REG);
if (!(val & (1 << (msg_obj_no - 1)))) {
can_get_echo_skb(dev,
msg_obj_no - C_CAN_MSG_OBJ_TX_FIRST);
stats->tx_bytes += priv->read_reg(priv,
- &priv->regs->ifregs[0].msg_cntrl)
+ C_CAN_IFACE(MSGCTRL_REG, 0))
& IF_MCONT_DLC_MASK;
stats->tx_packets++;
c_can_inval_msg_object(dev, 0, msg_obj_no);
@@ -744,11 +748,11 @@ static int c_can_do_rx_poll(struct net_device *dev, int quota)
u32 num_rx_pkts = 0;
unsigned int msg_obj, msg_ctrl_save;
struct c_can_priv *priv = netdev_priv(dev);
- u32 val = c_can_read_reg32(priv, &priv->regs->intpnd1);
+ u32 val = c_can_read_reg32(priv, C_CAN_INTPND1_REG);
for (msg_obj = C_CAN_MSG_OBJ_RX_FIRST;
msg_obj <= C_CAN_MSG_OBJ_RX_LAST && quota > 0;
- val = c_can_read_reg32(priv, &priv->regs->intpnd1),
+ val = c_can_read_reg32(priv, C_CAN_INTPND1_REG),
msg_obj++) {
/*
* as interrupt pending register's bit n-1 corresponds to
@@ -758,7 +762,7 @@ static int c_can_do_rx_poll(struct net_device *dev, int quota)
c_can_object_get(dev, 0, msg_obj, IF_COMM_ALL &
~IF_COMM_TXRQST);
msg_ctrl_save = priv->read_reg(priv,
- &priv->regs->ifregs[0].msg_cntrl);
+ C_CAN_IFACE(MSGCTRL_REG, 0));
if (msg_ctrl_save & IF_MCONT_EOB)
return num_rx_pkts;
@@ -819,7 +823,7 @@ static int c_can_handle_state_change(struct net_device *dev,
return 0;
c_can_get_berr_counter(dev, &bec);
- reg_err_counter = priv->read_reg(priv, &priv->regs->err_cnt);
+ reg_err_counter = priv->read_reg(priv, C_CAN_ERR_CNT_REG);
rx_err_passive = (reg_err_counter & ERR_CNT_RP_MASK) >>
ERR_CNT_RP_SHIFT;
@@ -935,7 +939,7 @@ static int c_can_handle_bus_err(struct net_device *dev,
}
/* set a `lec` value so that we can check for updates later */
- priv->write_reg(priv, &priv->regs->status, LEC_UNUSED);
+ priv->write_reg(priv, C_CAN_STS_REG, LEC_UNUSED);
netif_receive_skb(skb);
stats->rx_packets++;
@@ -959,15 +963,15 @@ static int c_can_poll(struct napi_struct *napi, int quota)
/* status events have the highest priority */
if (irqstatus == STATUS_INTERRUPT) {
priv->current_status = priv->read_reg(priv,
- &priv->regs->status);
+ C_CAN_STS_REG);
/* handle Tx/Rx events */
if (priv->current_status & STATUS_TXOK)
- priv->write_reg(priv, &priv->regs->status,
+ priv->write_reg(priv, C_CAN_STS_REG,
priv->current_status & ~STATUS_TXOK);
if (priv->current_status & STATUS_RXOK)
- priv->write_reg(priv, &priv->regs->status,
+ priv->write_reg(priv, C_CAN_STS_REG,
priv->current_status & ~STATUS_RXOK);
/* handle state changes */
@@ -1033,7 +1037,7 @@ static irqreturn_t c_can_isr(int irq, void *dev_id)
struct net_device *dev = (struct net_device *)dev_id;
struct c_can_priv *priv = netdev_priv(dev);
- priv->irqstatus = priv->read_reg(priv, &priv->regs->interrupt);
+ priv->irqstatus = priv->read_reg(priv, C_CAN_INT_REG);
if (!priv->irqstatus)
return IRQ_NONE;
diff --git a/drivers/net/can/c_can/c_can.h b/drivers/net/can/c_can/c_can.h
index 5f32d34af507..01a7049ab990 100644
--- a/drivers/net/can/c_can/c_can.h
+++ b/drivers/net/can/c_can/c_can.h
@@ -22,43 +22,129 @@
#ifndef C_CAN_H
#define C_CAN_H
-/* c_can IF registers */
-struct c_can_if_regs {
- u16 com_req;
- u16 com_mask;
- u16 mask1;
- u16 mask2;
- u16 arb1;
- u16 arb2;
- u16 msg_cntrl;
- u16 data[4];
- u16 _reserved[13];
+enum reg {
+ C_CAN_CTRL_REG = 0,
+ C_CAN_STS_REG,
+ C_CAN_ERR_CNT_REG,
+ C_CAN_BTR_REG,
+ C_CAN_INT_REG,
+ C_CAN_TEST_REG,
+ C_CAN_BRPEXT_REG,
+ C_CAN_IF1_COMREQ_REG,
+ C_CAN_IF1_COMMSK_REG,
+ C_CAN_IF1_MASK1_REG,
+ C_CAN_IF1_MASK2_REG,
+ C_CAN_IF1_ARB1_REG,
+ C_CAN_IF1_ARB2_REG,
+ C_CAN_IF1_MSGCTRL_REG,
+ C_CAN_IF1_DATA1_REG,
+ C_CAN_IF1_DATA2_REG,
+ C_CAN_IF1_DATA3_REG,
+ C_CAN_IF1_DATA4_REG,
+ C_CAN_IF2_COMREQ_REG,
+ C_CAN_IF2_COMMSK_REG,
+ C_CAN_IF2_MASK1_REG,
+ C_CAN_IF2_MASK2_REG,
+ C_CAN_IF2_ARB1_REG,
+ C_CAN_IF2_ARB2_REG,
+ C_CAN_IF2_MSGCTRL_REG,
+ C_CAN_IF2_DATA1_REG,
+ C_CAN_IF2_DATA2_REG,
+ C_CAN_IF2_DATA3_REG,
+ C_CAN_IF2_DATA4_REG,
+ C_CAN_TXRQST1_REG,
+ C_CAN_TXRQST2_REG,
+ C_CAN_NEWDAT1_REG,
+ C_CAN_NEWDAT2_REG,
+ C_CAN_INTPND1_REG,
+ C_CAN_INTPND2_REG,
+ C_CAN_MSGVAL1_REG,
+ C_CAN_MSGVAL2_REG,
};
-/* c_can hardware registers */
-struct c_can_regs {
- u16 control;
- u16 status;
- u16 err_cnt;
- u16 btr;
- u16 interrupt;
- u16 test;
- u16 brp_ext;
- u16 _reserved1;
- struct c_can_if_regs ifregs[2]; /* [0] = IF1 and [1] = IF2 */
- u16 _reserved2[8];
- u16 txrqst1;
- u16 txrqst2;
- u16 _reserved3[6];
- u16 newdat1;
- u16 newdat2;
- u16 _reserved4[6];
- u16 intpnd1;
- u16 intpnd2;
- u16 _reserved5[6];
- u16 msgval1;
- u16 msgval2;
- u16 _reserved6[6];
+static const u16 reg_map_c_can[] = {
+ [C_CAN_CTRL_REG] = 0x00,
+ [C_CAN_STS_REG] = 0x02,
+ [C_CAN_ERR_CNT_REG] = 0x04,
+ [C_CAN_BTR_REG] = 0x06,
+ [C_CAN_INT_REG] = 0x08,
+ [C_CAN_TEST_REG] = 0x0A,
+ [C_CAN_BRPEXT_REG] = 0x0C,
+ [C_CAN_IF1_COMREQ_REG] = 0x10,
+ [C_CAN_IF1_COMMSK_REG] = 0x12,
+ [C_CAN_IF1_MASK1_REG] = 0x14,
+ [C_CAN_IF1_MASK2_REG] = 0x16,
+ [C_CAN_IF1_ARB1_REG] = 0x18,
+ [C_CAN_IF1_ARB2_REG] = 0x1A,
+ [C_CAN_IF1_MSGCTRL_REG] = 0x1C,
+ [C_CAN_IF1_DATA1_REG] = 0x1E,
+ [C_CAN_IF1_DATA2_REG] = 0x20,
+ [C_CAN_IF1_DATA3_REG] = 0x22,
+ [C_CAN_IF1_DATA4_REG] = 0x24,
+ [C_CAN_IF2_COMREQ_REG] = 0x40,
+ [C_CAN_IF2_COMMSK_REG] = 0x42,
+ [C_CAN_IF2_MASK1_REG] = 0x44,
+ [C_CAN_IF2_MASK2_REG] = 0x46,
+ [C_CAN_IF2_ARB1_REG] = 0x48,
+ [C_CAN_IF2_ARB2_REG] = 0x4A,
+ [C_CAN_IF2_MSGCTRL_REG] = 0x4C,
+ [C_CAN_IF2_DATA1_REG] = 0x4E,
+ [C_CAN_IF2_DATA2_REG] = 0x50,
+ [C_CAN_IF2_DATA3_REG] = 0x52,
+ [C_CAN_IF2_DATA4_REG] = 0x54,
+ [C_CAN_TXRQST1_REG] = 0x80,
+ [C_CAN_TXRQST2_REG] = 0x82,
+ [C_CAN_NEWDAT1_REG] = 0x90,
+ [C_CAN_NEWDAT2_REG] = 0x92,
+ [C_CAN_INTPND1_REG] = 0xA0,
+ [C_CAN_INTPND2_REG] = 0xA2,
+ [C_CAN_MSGVAL1_REG] = 0xB0,
+ [C_CAN_MSGVAL2_REG] = 0xB2,
+};
+
+static const u16 reg_map_d_can[] = {
+ [C_CAN_CTRL_REG] = 0x00,
+ [C_CAN_STS_REG] = 0x04,
+ [C_CAN_ERR_CNT_REG] = 0x08,
+ [C_CAN_BTR_REG] = 0x0C,
+ [C_CAN_BRPEXT_REG] = 0x0E,
+ [C_CAN_INT_REG] = 0x10,
+ [C_CAN_TEST_REG] = 0x14,
+ [C_CAN_TXRQST1_REG] = 0x88,
+ [C_CAN_TXRQST2_REG] = 0x8A,
+ [C_CAN_NEWDAT1_REG] = 0x9C,
+ [C_CAN_NEWDAT2_REG] = 0x9E,
+ [C_CAN_INTPND1_REG] = 0xB0,
+ [C_CAN_INTPND2_REG] = 0xB2,
+ [C_CAN_MSGVAL1_REG] = 0xC4,
+ [C_CAN_MSGVAL2_REG] = 0xC6,
+ [C_CAN_IF1_COMREQ_REG] = 0x100,
+ [C_CAN_IF1_COMMSK_REG] = 0x102,
+ [C_CAN_IF1_MASK1_REG] = 0x104,
+ [C_CAN_IF1_MASK2_REG] = 0x106,
+ [C_CAN_IF1_ARB1_REG] = 0x108,
+ [C_CAN_IF1_ARB2_REG] = 0x10A,
+ [C_CAN_IF1_MSGCTRL_REG] = 0x10C,
+ [C_CAN_IF1_DATA1_REG] = 0x110,
+ [C_CAN_IF1_DATA2_REG] = 0x112,
+ [C_CAN_IF1_DATA3_REG] = 0x114,
+ [C_CAN_IF1_DATA4_REG] = 0x116,
+ [C_CAN_IF2_COMREQ_REG] = 0x120,
+ [C_CAN_IF2_COMMSK_REG] = 0x122,
+ [C_CAN_IF2_MASK1_REG] = 0x124,
+ [C_CAN_IF2_MASK2_REG] = 0x126,
+ [C_CAN_IF2_ARB1_REG] = 0x128,
+ [C_CAN_IF2_ARB2_REG] = 0x12A,
+ [C_CAN_IF2_MSGCTRL_REG] = 0x12C,
+ [C_CAN_IF2_DATA1_REG] = 0x130,
+ [C_CAN_IF2_DATA2_REG] = 0x132,
+ [C_CAN_IF2_DATA3_REG] = 0x134,
+ [C_CAN_IF2_DATA4_REG] = 0x136,
+};
+
+enum c_can_dev_id {
+ C_CAN_DEVTYPE,
+ D_CAN_DEVTYPE,
};
/* c_can private data structure */
@@ -69,9 +155,10 @@ struct c_can_priv {
int tx_object;
int current_status;
int last_status;
- u16 (*read_reg) (struct c_can_priv *priv, void *reg);
- void (*write_reg) (struct c_can_priv *priv, void *reg, u16 val);
- struct c_can_regs __iomem *regs;
+ u16 (*read_reg) (struct c_can_priv *priv, enum reg index);
+ void (*write_reg) (struct c_can_priv *priv, enum reg index, u16 val);
+ void __iomem *base;
+ const u16 *regs;
unsigned long irq_flags; /* for request_irq() */
unsigned int tx_next;
unsigned int tx_echo;
diff --git a/drivers/net/can/c_can/c_can_pci.c b/drivers/net/can/c_can/c_can_pci.c
new file mode 100644
index 000000000000..1011146ea513
--- /dev/null
+++ b/drivers/net/can/c_can/c_can_pci.c
@@ -0,0 +1,221 @@
+/*
+ * PCI bus driver for Bosch C_CAN/D_CAN controller
+ *
+ * Copyright (C) 2012 Federico Vaga <federico.vaga@gmail.com>
+ *
+ * Borrowed from c_can_platform.c
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/pci.h>
+
+#include <linux/can/dev.h>
+
+#include "c_can.h"
+
+enum c_can_pci_reg_align {
+ C_CAN_REG_ALIGN_16,
+ C_CAN_REG_ALIGN_32,
+};
+
+struct c_can_pci_data {
+ /* Specify if is C_CAN or D_CAN */
+ enum c_can_dev_id type;
+ /* Set the register alignment in the memory */
+ enum c_can_pci_reg_align reg_align;
+ /* Set the frequency */
+ unsigned int freq;
+};
+
+/*
+ * 16-bit c_can registers can be arranged differently in the memory
+ * architecture of different implementations. For example: 16-bit
+ * registers can be aligned to a 16-bit boundary or 32-bit boundary etc.
+ * Handle the same by providing a common read/write interface.
+ */
+static u16 c_can_pci_read_reg_aligned_to_16bit(struct c_can_priv *priv,
+ enum reg index)
+{
+ return readw(priv->base + priv->regs[index]);
+}
+
+static void c_can_pci_write_reg_aligned_to_16bit(struct c_can_priv *priv,
+ enum reg index, u16 val)
+{
+ writew(val, priv->base + priv->regs[index]);
+}
+
+static u16 c_can_pci_read_reg_aligned_to_32bit(struct c_can_priv *priv,
+ enum reg index)
+{
+ return readw(priv->base + 2 * priv->regs[index]);
+}
+
+static void c_can_pci_write_reg_aligned_to_32bit(struct c_can_priv *priv,
+ enum reg index, u16 val)
+{
+ writew(val, priv->base + 2 * priv->regs[index]);
+}
+
+static int __devinit c_can_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct c_can_pci_data *c_can_pci_data = (void *)ent->driver_data;
+ struct c_can_priv *priv;
+ struct net_device *dev;
+ void __iomem *addr;
+ int ret;
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "pci_enable_device FAILED\n");
+ goto out;
+ }
+
+ ret = pci_request_regions(pdev, KBUILD_MODNAME);
+ if (ret) {
+ dev_err(&pdev->dev, "pci_request_regions FAILED\n");
+ goto out_disable_device;
+ }
+
+ pci_set_master(pdev);
+ pci_enable_msi(pdev);
+
+ addr = pci_iomap(pdev, 0, pci_resource_len(pdev, 0));
+ if (!addr) {
+ dev_err(&pdev->dev,
+ "device has no PCI memory resources, "
+ "failing adapter\n");
+ ret = -ENOMEM;
+ goto out_release_regions;
+ }
+
+ /* allocate the c_can device */
+ dev = alloc_c_can_dev();
+ if (!dev) {
+ ret = -ENOMEM;
+ goto out_iounmap;
+ }
+
+ priv = netdev_priv(dev);
+ pci_set_drvdata(pdev, dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ dev->irq = pdev->irq;
+ priv->base = addr;
+
+ if (!c_can_pci_data->freq) {
+ dev_err(&pdev->dev, "no clock frequency defined\n");
+ ret = -ENODEV;
+ goto out_free_c_can;
+ } else {
+ priv->can.clock.freq = c_can_pci_data->freq;
+ }
+
+ /* Configure CAN type */
+ switch (c_can_pci_data->type) {
+ case C_CAN_DEVTYPE:
+ priv->regs = reg_map_c_can;
+ break;
+ case D_CAN_DEVTYPE:
+ priv->regs = reg_map_d_can;
+ priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
+ break;
+ default:
+ ret = -EINVAL;
+ goto out_free_c_can;
+ }
+
+ /* Configure access to registers */
+ switch (c_can_pci_data->reg_align) {
+ case C_CAN_REG_ALIGN_32:
+ priv->read_reg = c_can_pci_read_reg_aligned_to_32bit;
+ priv->write_reg = c_can_pci_write_reg_aligned_to_32bit;
+ break;
+ case C_CAN_REG_ALIGN_16:
+ priv->read_reg = c_can_pci_read_reg_aligned_to_16bit;
+ priv->write_reg = c_can_pci_write_reg_aligned_to_16bit;
+ break;
+ default:
+ ret = -EINVAL;
+ goto out_free_c_can;
+ }
+
+ ret = register_c_can_dev(dev);
+ if (ret) {
+ dev_err(&pdev->dev, "registering %s failed (err=%d)\n",
+ KBUILD_MODNAME, ret);
+ goto out_free_c_can;
+ }
+
+ dev_dbg(&pdev->dev, "%s device registered (regs=%p, irq=%d)\n",
+ KBUILD_MODNAME, priv->regs, dev->irq);
+
+ return 0;
+
+out_free_c_can:
+ pci_set_drvdata(pdev, NULL);
+ free_c_can_dev(dev);
+out_iounmap:
+ pci_iounmap(pdev, addr);
+out_release_regions:
+ pci_disable_msi(pdev);
+ pci_clear_master(pdev);
+ pci_release_regions(pdev);
+out_disable_device:
+ pci_disable_device(pdev);
+out:
+ return ret;
+}
+
+static void __devexit c_can_pci_remove(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ struct c_can_priv *priv = netdev_priv(dev);
+
+ unregister_c_can_dev(dev);
+
+ pci_set_drvdata(pdev, NULL);
+ free_c_can_dev(dev);
+
+ pci_iounmap(pdev, priv->base);
+ pci_disable_msi(pdev);
+ pci_clear_master(pdev);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+static struct c_can_pci_data c_can_sta2x11= {
+ .type = C_CAN_DEVTYPE,
+ .reg_align = C_CAN_REG_ALIGN_32,
+ .freq = 52000000, /* 52 Mhz */
+};
+
+#define C_CAN_ID(_vend, _dev, _driverdata) { \
+ PCI_DEVICE(_vend, _dev), \
+ .driver_data = (unsigned long)&_driverdata, \
+}
+static DEFINE_PCI_DEVICE_TABLE(c_can_pci_tbl) = {
+ C_CAN_ID(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_CAN,
+ c_can_sta2x11),
+ {},
+};
+static struct pci_driver c_can_pci_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = c_can_pci_tbl,
+ .probe = c_can_pci_probe,
+ .remove = __devexit_p(c_can_pci_remove),
+};
+
+module_pci_driver(c_can_pci_driver);
+
+MODULE_AUTHOR("Federico Vaga <federico.vaga@gmail.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("PCI CAN bus driver for Bosch C_CAN/D_CAN controller");
+MODULE_DEVICE_TABLE(pci, c_can_pci_tbl);
diff --git a/drivers/net/can/c_can/c_can_platform.c b/drivers/net/can/c_can/c_can_platform.c
index 5e1a5ff6476e..f0921d16f0a9 100644
--- a/drivers/net/can/c_can/c_can_platform.c
+++ b/drivers/net/can/c_can/c_can_platform.c
@@ -42,27 +42,27 @@
* Handle the same by providing a common read/write interface.
*/
static u16 c_can_plat_read_reg_aligned_to_16bit(struct c_can_priv *priv,
- void *reg)
+ enum reg index)
{
- return readw(reg);
+ return readw(priv->base + priv->regs[index]);
}
static void c_can_plat_write_reg_aligned_to_16bit(struct c_can_priv *priv,
- void *reg, u16 val)
+ enum reg index, u16 val)
{
- writew(val, reg);
+ writew(val, priv->base + priv->regs[index]);
}
static u16 c_can_plat_read_reg_aligned_to_32bit(struct c_can_priv *priv,
- void *reg)
+ enum reg index)
{
- return readw(reg + (long)reg - (long)priv->regs);
+ return readw(priv->base + 2 * priv->regs[index]);
}
static void c_can_plat_write_reg_aligned_to_32bit(struct c_can_priv *priv,
- void *reg, u16 val)
+ enum reg index, u16 val)
{
- writew(val, reg + (long)reg - (long)priv->regs);
+ writew(val, priv->base + 2 * priv->regs[index]);
}
static int __devinit c_can_plat_probe(struct platform_device *pdev)
@@ -71,6 +71,7 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev)
void __iomem *addr;
struct net_device *dev;
struct c_can_priv *priv;
+ const struct platform_device_id *id;
struct resource *mem;
int irq;
#ifdef CONFIG_HAVE_CLK
@@ -115,26 +116,40 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev)
}
priv = netdev_priv(dev);
+ id = platform_get_device_id(pdev);
+ switch (id->driver_data) {
+ case C_CAN_DEVTYPE:
+ priv->regs = reg_map_c_can;
+ switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
+ case IORESOURCE_MEM_32BIT:
+ priv->read_reg = c_can_plat_read_reg_aligned_to_32bit;
+ priv->write_reg = c_can_plat_write_reg_aligned_to_32bit;
+ break;
+ case IORESOURCE_MEM_16BIT:
+ default:
+ priv->read_reg = c_can_plat_read_reg_aligned_to_16bit;
+ priv->write_reg = c_can_plat_write_reg_aligned_to_16bit;
+ break;
+ }
+ break;
+ case D_CAN_DEVTYPE:
+ priv->regs = reg_map_d_can;
+ priv->can.ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
+ priv->read_reg = c_can_plat_read_reg_aligned_to_16bit;
+ priv->write_reg = c_can_plat_write_reg_aligned_to_16bit;
+ break;
+ default:
+ ret = -EINVAL;
+ goto exit_free_device;
+ }
dev->irq = irq;
- priv->regs = addr;
+ priv->base = addr;
#ifdef CONFIG_HAVE_CLK
priv->can.clock.freq = clk_get_rate(clk);
priv->priv = clk;
#endif
- switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
- case IORESOURCE_MEM_32BIT:
- priv->read_reg = c_can_plat_read_reg_aligned_to_32bit;
- priv->write_reg = c_can_plat_write_reg_aligned_to_32bit;
- break;
- case IORESOURCE_MEM_16BIT:
- default:
- priv->read_reg = c_can_plat_read_reg_aligned_to_16bit;
- priv->write_reg = c_can_plat_write_reg_aligned_to_16bit;
- break;
- }
-
platform_set_drvdata(pdev, dev);
SET_NETDEV_DEV(dev, &pdev->dev);
@@ -146,7 +161,7 @@ static int __devinit c_can_plat_probe(struct platform_device *pdev)
}
dev_info(&pdev->dev, "%s device registered (regs=%p, irq=%d)\n",
- KBUILD_MODNAME, priv->regs, dev->irq);
+ KBUILD_MODNAME, priv->base, dev->irq);
return 0;
exit_free_device:
@@ -176,7 +191,7 @@ static int __devexit c_can_plat_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
free_c_can_dev(dev);
- iounmap(priv->regs);
+ iounmap(priv->base);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(mem->start, resource_size(mem));
@@ -188,6 +203,20 @@ static int __devexit c_can_plat_remove(struct platform_device *pdev)
return 0;
}
+static const struct platform_device_id c_can_id_table[] = {
+ {
+ .name = KBUILD_MODNAME,
+ .driver_data = C_CAN_DEVTYPE,
+ }, {
+ .name = "c_can",
+ .driver_data = C_CAN_DEVTYPE,
+ }, {
+ .name = "d_can",
+ .driver_data = D_CAN_DEVTYPE,
+ }, {
+ }
+};
+
static struct platform_driver c_can_plat_driver = {
.driver = {
.name = KBUILD_MODNAME,
@@ -195,6 +224,7 @@ static struct platform_driver c_can_plat_driver = {
},
.probe = c_can_plat_probe,
.remove = __devexit_p(c_can_plat_remove),
+ .id_table = c_can_id_table,
};
module_platform_driver(c_can_plat_driver);
diff --git a/drivers/net/can/cc770/cc770.c b/drivers/net/can/cc770/cc770.c
index d42a6a7396f2..0f12abf6591c 100644
--- a/drivers/net/can/cc770/cc770.c
+++ b/drivers/net/can/cc770/cc770.c
@@ -90,7 +90,7 @@ static unsigned char cc770_obj_flags[CC770_OBJ_MAX] = {
[CC770_OBJ_TX] = 0,
};
-static struct can_bittiming_const cc770_bittiming_const = {
+static const struct can_bittiming_const cc770_bittiming_const = {
.name = KBUILD_MODNAME,
.tseg1_min = 1,
.tseg1_max = 16,
@@ -695,7 +695,7 @@ static void cc770_tx_interrupt(struct net_device *dev, unsigned int o)
netif_wake_queue(dev);
}
-irqreturn_t cc770_interrupt(int irq, void *dev_id)
+static irqreturn_t cc770_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct cc770_priv *priv = netdev_priv(dev);
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index f03d7a481a80..963e2ccd10db 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -33,6 +33,39 @@ MODULE_DESCRIPTION(MOD_DESC);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
+/* CAN DLC to real data length conversion helpers */
+
+static const u8 dlc2len[] = {0, 1, 2, 3, 4, 5, 6, 7,
+ 8, 12, 16, 20, 24, 32, 48, 64};
+
+/* get data length from can_dlc with sanitized can_dlc */
+u8 can_dlc2len(u8 can_dlc)
+{
+ return dlc2len[can_dlc & 0x0F];
+}
+EXPORT_SYMBOL_GPL(can_dlc2len);
+
+static const u8 len2dlc[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, /* 0 - 8 */
+ 9, 9, 9, 9, /* 9 - 12 */
+ 10, 10, 10, 10, /* 13 - 16 */
+ 11, 11, 11, 11, /* 17 - 20 */
+ 12, 12, 12, 12, /* 21 - 24 */
+ 13, 13, 13, 13, 13, 13, 13, 13, /* 25 - 32 */
+ 14, 14, 14, 14, 14, 14, 14, 14, /* 33 - 40 */
+ 14, 14, 14, 14, 14, 14, 14, 14, /* 41 - 48 */
+ 15, 15, 15, 15, 15, 15, 15, 15, /* 49 - 56 */
+ 15, 15, 15, 15, 15, 15, 15, 15}; /* 57 - 64 */
+
+/* map the sanitized data length to an appropriate data length code */
+u8 can_len2dlc(u8 len)
+{
+ if (unlikely(len > 64))
+ return 0xF;
+
+ return len2dlc[len];
+}
+EXPORT_SYMBOL_GPL(can_len2dlc);
+
#ifdef CONFIG_CAN_CALC_BITTIMING
#define CAN_CALC_MAX_ERROR 50 /* in one-tenth of a percent */
@@ -368,7 +401,7 @@ EXPORT_SYMBOL_GPL(can_free_echo_skb);
/*
* CAN device restart for bus-off recovery
*/
-void can_restart(unsigned long data)
+static void can_restart(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct can_priv *priv = netdev_priv(dev);
@@ -454,7 +487,7 @@ EXPORT_SYMBOL_GPL(can_bus_off);
static void can_setup(struct net_device *dev)
{
dev->type = ARPHRD_CAN;
- dev->mtu = sizeof(struct can_frame);
+ dev->mtu = CAN_MTU;
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->tx_queue_len = 10;
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 81d474102378..c5f143165f80 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -34,6 +34,7 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/consumer.h>
@@ -165,10 +166,21 @@ struct flexcan_regs {
u32 imask1; /* 0x28 */
u32 iflag2; /* 0x2c */
u32 iflag1; /* 0x30 */
- u32 _reserved2[19];
+ u32 crl2; /* 0x34 */
+ u32 esr2; /* 0x38 */
+ u32 imeur; /* 0x3c */
+ u32 lrfr; /* 0x40 */
+ u32 crcr; /* 0x44 */
+ u32 rxfgmask; /* 0x48 */
+ u32 rxfir; /* 0x4c */
+ u32 _reserved3[12];
struct flexcan_mb cantxfg[64];
};
+struct flexcan_devtype_data {
+ u32 hw_ver; /* hardware controller version */
+};
+
struct flexcan_priv {
struct can_priv can;
struct net_device *dev;
@@ -178,11 +190,21 @@ struct flexcan_priv {
u32 reg_esr;
u32 reg_ctrl_default;
- struct clk *clk;
+ struct clk *clk_ipg;
+ struct clk *clk_per;
struct flexcan_platform_data *pdata;
+ const struct flexcan_devtype_data *devtype_data;
+};
+
+static struct flexcan_devtype_data fsl_p1010_devtype_data = {
+ .hw_ver = 3,
+};
+
+static struct flexcan_devtype_data fsl_imx6q_devtype_data = {
+ .hw_ver = 10,
};
-static struct can_bittiming_const flexcan_bittiming_const = {
+static const struct can_bittiming_const flexcan_bittiming_const = {
.name = DRV_NAME,
.tseg1_min = 4,
.tseg1_max = 16,
@@ -750,6 +772,9 @@ static int flexcan_chip_start(struct net_device *dev)
flexcan_write(0x0, &regs->rx14mask);
flexcan_write(0x0, &regs->rx15mask);
+ if (priv->devtype_data->hw_ver >= 10)
+ flexcan_write(0x0, &regs->rxfgmask);
+
flexcan_transceiver_switch(priv, 1);
/* synchronize with the can bus */
@@ -804,7 +829,8 @@ static int flexcan_open(struct net_device *dev)
struct flexcan_priv *priv = netdev_priv(dev);
int err;
- clk_prepare_enable(priv->clk);
+ clk_prepare_enable(priv->clk_ipg);
+ clk_prepare_enable(priv->clk_per);
err = open_candev(dev);
if (err)
@@ -826,7 +852,8 @@ static int flexcan_open(struct net_device *dev)
out_close:
close_candev(dev);
out:
- clk_disable_unprepare(priv->clk);
+ clk_disable_unprepare(priv->clk_per);
+ clk_disable_unprepare(priv->clk_ipg);
return err;
}
@@ -840,7 +867,8 @@ static int flexcan_close(struct net_device *dev)
flexcan_chip_stop(dev);
free_irq(dev->irq, dev);
- clk_disable_unprepare(priv->clk);
+ clk_disable_unprepare(priv->clk_per);
+ clk_disable_unprepare(priv->clk_ipg);
close_candev(dev);
@@ -879,7 +907,8 @@ static int __devinit register_flexcandev(struct net_device *dev)
struct flexcan_regs __iomem *regs = priv->base;
u32 reg, err;
- clk_prepare_enable(priv->clk);
+ clk_prepare_enable(priv->clk_ipg);
+ clk_prepare_enable(priv->clk_per);
/* select "bus clock", chip must be disabled */
flexcan_chip_disable(priv);
@@ -912,7 +941,8 @@ static int __devinit register_flexcandev(struct net_device *dev)
out:
/* disable core and turn off clocks */
flexcan_chip_disable(priv);
- clk_disable_unprepare(priv->clk);
+ clk_disable_unprepare(priv->clk_per);
+ clk_disable_unprepare(priv->clk_ipg);
return err;
}
@@ -922,12 +952,25 @@ static void __devexit unregister_flexcandev(struct net_device *dev)
unregister_candev(dev);
}
+static const struct of_device_id flexcan_of_match[] = {
+ { .compatible = "fsl,p1010-flexcan", .data = &fsl_p1010_devtype_data, },
+ { .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, },
+ { /* sentinel */ },
+};
+
+static const struct platform_device_id flexcan_id_table[] = {
+ { .name = "flexcan", .driver_data = (kernel_ulong_t)&fsl_p1010_devtype_data, },
+ { /* sentinel */ },
+};
+
static int __devinit flexcan_probe(struct platform_device *pdev)
{
+ const struct of_device_id *of_id;
+ const struct flexcan_devtype_data *devtype_data;
struct net_device *dev;
struct flexcan_priv *priv;
struct resource *mem;
- struct clk *clk = NULL;
+ struct clk *clk_ipg = NULL, *clk_per = NULL;
struct pinctrl *pinctrl;
void __iomem *base;
resource_size_t mem_size;
@@ -938,23 +981,25 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
if (IS_ERR(pinctrl))
return PTR_ERR(pinctrl);
- if (pdev->dev.of_node) {
- const __be32 *clock_freq_p;
-
- clock_freq_p = of_get_property(pdev->dev.of_node,
- "clock-frequency", NULL);
- if (clock_freq_p)
- clock_freq = be32_to_cpup(clock_freq_p);
- }
+ if (pdev->dev.of_node)
+ of_property_read_u32(pdev->dev.of_node,
+ "clock-frequency", &clock_freq);
if (!clock_freq) {
- clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(clk)) {
- dev_err(&pdev->dev, "no clock defined\n");
- err = PTR_ERR(clk);
+ clk_ipg = devm_clk_get(&pdev->dev, "ipg");
+ if (IS_ERR(clk_ipg)) {
+ dev_err(&pdev->dev, "no ipg clock defined\n");
+ err = PTR_ERR(clk_ipg);
+ goto failed_clock;
+ }
+ clock_freq = clk_get_rate(clk_ipg);
+
+ clk_per = devm_clk_get(&pdev->dev, "per");
+ if (IS_ERR(clk_per)) {
+ dev_err(&pdev->dev, "no per clock defined\n");
+ err = PTR_ERR(clk_per);
goto failed_clock;
}
- clock_freq = clk_get_rate(clk);
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -982,6 +1027,17 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
goto failed_alloc;
}
+ of_id = of_match_device(flexcan_of_match, &pdev->dev);
+ if (of_id) {
+ devtype_data = of_id->data;
+ } else if (pdev->id_entry->driver_data) {
+ devtype_data = (struct flexcan_devtype_data *)
+ pdev->id_entry->driver_data;
+ } else {
+ err = -ENODEV;
+ goto failed_devtype;
+ }
+
dev->netdev_ops = &flexcan_netdev_ops;
dev->irq = irq;
dev->flags |= IFF_ECHO;
@@ -996,8 +1052,10 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
CAN_CTRLMODE_BERR_REPORTING;
priv->base = base;
priv->dev = dev;
- priv->clk = clk;
+ priv->clk_ipg = clk_ipg;
+ priv->clk_per = clk_per;
priv->pdata = pdev->dev.platform_data;
+ priv->devtype_data = devtype_data;
netif_napi_add(dev, &priv->napi, flexcan_poll, FLEXCAN_NAPI_WEIGHT);
@@ -1016,14 +1074,13 @@ static int __devinit flexcan_probe(struct platform_device *pdev)
return 0;
failed_register:
+ failed_devtype:
free_candev(dev);
failed_alloc:
iounmap(base);
failed_map:
release_mem_region(mem->start, mem_size);
failed_get:
- if (clk)
- clk_put(clk);
failed_clock:
return err;
}
@@ -1041,20 +1098,46 @@ static int __devexit flexcan_remove(struct platform_device *pdev)
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(mem->start, resource_size(mem));
- if (priv->clk)
- clk_put(priv->clk);
-
free_candev(dev);
return 0;
}
-static struct of_device_id flexcan_of_match[] = {
- {
- .compatible = "fsl,p1010-flexcan",
- },
- {},
-};
+#ifdef CONFIG_PM
+static int flexcan_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct flexcan_priv *priv = netdev_priv(dev);
+
+ flexcan_chip_disable(priv);
+
+ if (netif_running(dev)) {
+ netif_stop_queue(dev);
+ netif_device_detach(dev);
+ }
+ priv->can.state = CAN_STATE_SLEEPING;
+
+ return 0;
+}
+
+static int flexcan_resume(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct flexcan_priv *priv = netdev_priv(dev);
+
+ priv->can.state = CAN_STATE_ERROR_ACTIVE;
+ if (netif_running(dev)) {
+ netif_device_attach(dev);
+ netif_start_queue(dev);
+ }
+ flexcan_chip_enable(priv);
+
+ return 0;
+}
+#else
+#define flexcan_suspend NULL
+#define flexcan_resume NULL
+#endif
static struct platform_driver flexcan_driver = {
.driver = {
@@ -1064,6 +1147,9 @@ static struct platform_driver flexcan_driver = {
},
.probe = flexcan_probe,
.remove = __devexit_p(flexcan_remove),
+ .suspend = flexcan_suspend,
+ .resume = flexcan_resume,
+ .id_table = flexcan_id_table,
};
module_platform_driver(flexcan_driver);
diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
index 08c893cb7896..98ee43819911 100644
--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c
@@ -116,6 +116,7 @@
#define ICAN3_BUSERR_QUOTA_MAX 255
/* Janz ICAN3 CAN Frame Conversion */
+#define ICAN3_SNGL 0x02
#define ICAN3_ECHO 0x10
#define ICAN3_EFF_RTR 0x40
#define ICAN3_SFF_RTR 0x10
@@ -220,6 +221,9 @@ struct ican3_dev {
/* old and new style host interface */
unsigned int iftype;
+ /* queue for echo packets */
+ struct sk_buff_head echoq;
+
/*
* Any function which changes the current DPM page must hold this
* lock while it is performing data accesses. This ensures that the
@@ -235,7 +239,6 @@ struct ican3_dev {
/* fast host interface */
unsigned int fastrx_start;
- unsigned int fastrx_int;
unsigned int fastrx_num;
unsigned int fasttx_start;
unsigned int fasttx_num;
@@ -454,7 +457,6 @@ static void __devinit ican3_init_fast_host_interface(struct ican3_dev *mod)
/* save the start recv page */
mod->fastrx_start = mod->free_page;
mod->fastrx_num = 0;
- mod->fastrx_int = 0;
/* build a single fast tohost queue descriptor */
memset(&desc, 0, sizeof(desc));
@@ -813,10 +815,10 @@ static void ican3_to_can_frame(struct ican3_dev *mod,
cf->can_id |= desc->data[0] << 3;
cf->can_id |= (desc->data[1] & 0xe0) >> 5;
- cf->can_dlc = desc->data[1] & ICAN3_CAN_DLC_MASK;
- memcpy(cf->data, &desc->data[2], sizeof(cf->data));
+ cf->can_dlc = get_can_dlc(desc->data[1] & ICAN3_CAN_DLC_MASK);
+ memcpy(cf->data, &desc->data[2], cf->can_dlc);
} else {
- cf->can_dlc = desc->data[0] & ICAN3_CAN_DLC_MASK;
+ cf->can_dlc = get_can_dlc(desc->data[0] & ICAN3_CAN_DLC_MASK);
if (desc->data[0] & ICAN3_EFF_RTR)
cf->can_id |= CAN_RTR_FLAG;
@@ -831,7 +833,7 @@ static void ican3_to_can_frame(struct ican3_dev *mod,
cf->can_id |= desc->data[3] >> 5; /* 2-0 */
}
- memcpy(cf->data, &desc->data[6], sizeof(cf->data));
+ memcpy(cf->data, &desc->data[6], cf->can_dlc);
}
}
@@ -847,6 +849,10 @@ static void can_frame_to_ican3(struct ican3_dev *mod,
desc->data[0] |= cf->can_dlc;
desc->data[1] |= ICAN3_ECHO;
+ /* support single transmission (no retries) mode */
+ if (mod->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
+ desc->data[1] |= ICAN3_SNGL;
+
if (cf->can_id & CAN_RTR_FLAG)
desc->data[0] |= ICAN3_EFF_RTR;
@@ -863,7 +869,7 @@ static void can_frame_to_ican3(struct ican3_dev *mod,
}
/* copy the data bits into the descriptor */
- memcpy(&desc->data[6], cf->data, sizeof(cf->data));
+ memcpy(&desc->data[6], cf->data, cf->can_dlc);
}
/*
@@ -909,8 +915,8 @@ static void ican3_handle_msglost(struct ican3_dev *mod, struct ican3_msg *msg)
if (skb) {
cf->can_id |= CAN_ERR_CRTL;
cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
+ stats->rx_over_errors++;
stats->rx_errors++;
- stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
}
}
@@ -927,7 +933,7 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
struct net_device *dev = mod->ndev;
struct net_device_stats *stats = &dev->stats;
enum can_state state = mod->can.state;
- u8 status, isrc, rxerr, txerr;
+ u8 isrc, ecc, status, rxerr, txerr;
struct can_frame *cf;
struct sk_buff *skb;
@@ -943,15 +949,53 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
return -EINVAL;
}
- skb = alloc_can_err_skb(dev, &cf);
- if (skb == NULL)
- return -ENOMEM;
-
isrc = msg->data[0];
+ ecc = msg->data[2];
status = msg->data[3];
rxerr = msg->data[4];
txerr = msg->data[5];
+ /*
+ * This hardware lacks any support other than bus error messages to
+ * determine if packet transmission has failed.
+ *
+ * When TX errors happen, one echo skb needs to be dropped from the
+ * front of the queue.
+ *
+ * A small bit of code is duplicated here and below, to avoid error
+ * skb allocation when it will just be freed immediately.
+ */
+ if (isrc == CEVTIND_BEI) {
+ int ret;
+ dev_dbg(mod->dev, "bus error interrupt\n");
+
+ /* TX error */
+ if (!(ecc & ECC_DIR)) {
+ kfree_skb(skb_dequeue(&mod->echoq));
+ stats->tx_errors++;
+ } else {
+ stats->rx_errors++;
+ }
+
+ /*
+ * The controller automatically disables bus-error interrupts
+ * and therefore we must re-enable them.
+ */
+ ret = ican3_set_buserror(mod, 1);
+ if (ret) {
+ dev_err(mod->dev, "unable to re-enable bus-error\n");
+ return ret;
+ }
+
+ /* bus error reporting is off, return immediately */
+ if (!(mod->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING))
+ return 0;
+ }
+
+ skb = alloc_can_err_skb(dev, &cf);
+ if (skb == NULL)
+ return -ENOMEM;
+
/* data overrun interrupt */
if (isrc == CEVTIND_DOI || isrc == CEVTIND_LOST) {
dev_dbg(mod->dev, "data overrun interrupt\n");
@@ -980,11 +1024,7 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
/* bus error interrupt */
if (isrc == CEVTIND_BEI) {
- u8 ecc = msg->data[2];
-
- dev_dbg(mod->dev, "bus error interrupt\n");
mod->can.can_stats.bus_error++;
- stats->rx_errors++;
cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
switch (ecc & ECC_MASK) {
@@ -1003,7 +1043,7 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
break;
}
- if ((ecc & ECC_DIR) == 0)
+ if (!(ecc & ECC_DIR))
cf->data[2] |= CAN_ERR_PROT_TX;
cf->data[6] = txerr;
@@ -1030,8 +1070,6 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
}
mod->can.state = state;
- stats->rx_errors++;
- stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
return 0;
}
@@ -1091,6 +1129,88 @@ static void ican3_handle_message(struct ican3_dev *mod, struct ican3_msg *msg)
}
/*
+ * The ican3 needs to store all echo skbs, and therefore cannot
+ * use the generic infrastructure for this.
+ */
+static void ican3_put_echo_skb(struct ican3_dev *mod, struct sk_buff *skb)
+{
+ struct sock *srcsk = skb->sk;
+
+ if (atomic_read(&skb->users) != 1) {
+ struct sk_buff *old_skb = skb;
+
+ skb = skb_clone(old_skb, GFP_ATOMIC);
+ kfree_skb(old_skb);
+ if (!skb)
+ return;
+ } else {
+ skb_orphan(skb);
+ }
+
+ skb->sk = srcsk;
+
+ /* save this skb for tx interrupt echo handling */
+ skb_queue_tail(&mod->echoq, skb);
+}
+
+static unsigned int ican3_get_echo_skb(struct ican3_dev *mod)
+{
+ struct sk_buff *skb = skb_dequeue(&mod->echoq);
+ struct can_frame *cf;
+ u8 dlc;
+
+ /* this should never trigger unless there is a driver bug */
+ if (!skb) {
+ netdev_err(mod->ndev, "BUG: echo skb not occupied\n");
+ return 0;
+ }
+
+ cf = (struct can_frame *)skb->data;
+ dlc = cf->can_dlc;
+
+ /* check flag whether this packet has to be looped back */
+ if (skb->pkt_type != PACKET_LOOPBACK) {
+ kfree_skb(skb);
+ return dlc;
+ }
+
+ skb->protocol = htons(ETH_P_CAN);
+ skb->pkt_type = PACKET_BROADCAST;
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb->dev = mod->ndev;
+ netif_receive_skb(skb);
+ return dlc;
+}
+
+/*
+ * Compare an skb with an existing echo skb
+ *
+ * This function will be used on devices which have a hardware loopback.
+ * On these devices, this function can be used to compare a received skb
+ * with the saved echo skbs so that the hardware echo skb can be dropped.
+ *
+ * Returns true if the skb's are identical, false otherwise.
+ */
+static bool ican3_echo_skb_matches(struct ican3_dev *mod, struct sk_buff *skb)
+{
+ struct can_frame *cf = (struct can_frame *)skb->data;
+ struct sk_buff *echo_skb = skb_peek(&mod->echoq);
+ struct can_frame *echo_cf;
+
+ if (!echo_skb)
+ return false;
+
+ echo_cf = (struct can_frame *)echo_skb->data;
+ if (cf->can_id != echo_cf->can_id)
+ return false;
+
+ if (cf->can_dlc != echo_cf->can_dlc)
+ return false;
+
+ return memcmp(cf->data, echo_cf->data, cf->can_dlc) == 0;
+}
+
+/*
* Check that there is room in the TX ring to transmit another skb
*
* LOCKING: must hold mod->lock
@@ -1100,6 +1220,10 @@ static bool ican3_txok(struct ican3_dev *mod)
struct ican3_fast_desc __iomem *desc;
u8 control;
+ /* check that we have echo queue space */
+ if (skb_queue_len(&mod->echoq) >= ICAN3_TX_BUFFERS)
+ return false;
+
/* copy the control bits of the descriptor */
ican3_set_page(mod, mod->fasttx_start + (mod->fasttx_num / 16));
desc = mod->dpm + ((mod->fasttx_num % 16) * sizeof(*desc));
@@ -1150,10 +1274,27 @@ static int ican3_recv_skb(struct ican3_dev *mod)
/* convert the ICAN3 frame into Linux CAN format */
ican3_to_can_frame(mod, &desc, cf);
- /* receive the skb, update statistics */
- netif_receive_skb(skb);
+ /*
+ * If this is an ECHO frame received from the hardware loopback
+ * feature, use the skb saved in the ECHO stack instead. This allows
+ * the Linux CAN core to support CAN_RAW_RECV_OWN_MSGS correctly.
+ *
+ * Since this is a confirmation of a successfully transmitted packet
+ * sent from this host, update the transmit statistics.
+ *
+ * Also, the netdevice queue needs to be allowed to send packets again.
+ */
+ if (ican3_echo_skb_matches(mod, skb)) {
+ stats->tx_packets++;
+ stats->tx_bytes += ican3_get_echo_skb(mod);
+ kfree_skb(skb);
+ goto err_noalloc;
+ }
+
+ /* update statistics, receive the skb */
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
+ netif_receive_skb(skb);
err_noalloc:
/* toggle the valid bit and return the descriptor to the ring */
@@ -1176,13 +1317,13 @@ err_noalloc:
static int ican3_napi(struct napi_struct *napi, int budget)
{
struct ican3_dev *mod = container_of(napi, struct ican3_dev, napi);
- struct ican3_msg msg;
unsigned long flags;
int received = 0;
int ret;
/* process all communication messages */
while (true) {
+ struct ican3_msg msg;
ret = ican3_recv_msg(mod, &msg);
if (ret)
break;
@@ -1325,7 +1466,7 @@ static int __devinit ican3_startup_module(struct ican3_dev *mod)
}
/* default to "bus errors enabled" */
- ret = ican3_set_buserror(mod, ICAN3_BUSERR_QUOTA_MAX);
+ ret = ican3_set_buserror(mod, 1);
if (ret) {
dev_err(mod->dev, "unable to set bus-error\n");
return ret;
@@ -1354,7 +1495,6 @@ static int __devinit ican3_startup_module(struct ican3_dev *mod)
static int ican3_open(struct net_device *ndev)
{
struct ican3_dev *mod = netdev_priv(ndev);
- u8 quota;
int ret;
/* open the CAN layer */
@@ -1364,19 +1504,6 @@ static int ican3_open(struct net_device *ndev)
return ret;
}
- /* set the bus error generation state appropriately */
- if (mod->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
- quota = ICAN3_BUSERR_QUOTA_MAX;
- else
- quota = 0;
-
- ret = ican3_set_buserror(mod, quota);
- if (ret) {
- dev_err(mod->dev, "unable to set bus-error\n");
- close_candev(ndev);
- return ret;
- }
-
/* bring the bus online */
ret = ican3_set_bus_state(mod, true);
if (ret) {
@@ -1408,6 +1535,9 @@ static int ican3_stop(struct net_device *ndev)
return ret;
}
+ /* drop all outstanding echo skbs */
+ skb_queue_purge(&mod->echoq);
+
/* close the CAN layer */
close_candev(ndev);
return 0;
@@ -1416,18 +1546,19 @@ static int ican3_stop(struct net_device *ndev)
static int ican3_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct ican3_dev *mod = netdev_priv(ndev);
- struct net_device_stats *stats = &ndev->stats;
struct can_frame *cf = (struct can_frame *)skb->data;
struct ican3_fast_desc desc;
void __iomem *desc_addr;
unsigned long flags;
+ if (can_dropped_invalid_skb(ndev, skb))
+ return NETDEV_TX_OK;
+
spin_lock_irqsave(&mod->lock, flags);
/* check that we can actually transmit */
if (!ican3_txok(mod)) {
- dev_err(mod->dev, "no free descriptors, stopping queue\n");
- netif_stop_queue(ndev);
+ dev_err(mod->dev, "BUG: no free descriptors\n");
spin_unlock_irqrestore(&mod->lock, flags);
return NETDEV_TX_BUSY;
}
@@ -1442,6 +1573,14 @@ static int ican3_xmit(struct sk_buff *skb, struct net_device *ndev)
can_frame_to_ican3(mod, cf, &desc);
/*
+ * This hardware doesn't have TX-done notifications, so we'll try and
+ * emulate it the best we can using ECHO skbs. Add the skb to the ECHO
+ * stack. Upon packet reception, check if the ECHO skb and received
+ * skb match, and use that to wake the queue.
+ */
+ ican3_put_echo_skb(mod, skb);
+
+ /*
* the programming manual says that you must set the IVALID bit, then
* interrupt, then set the valid bit. Quite weird, but it seems to be
* required for this to work
@@ -1459,19 +1598,7 @@ static int ican3_xmit(struct sk_buff *skb, struct net_device *ndev)
mod->fasttx_num = (desc.control & DESC_WRAP) ? 0
: (mod->fasttx_num + 1);
- /* update statistics */
- stats->tx_packets++;
- stats->tx_bytes += cf->can_dlc;
- kfree_skb(skb);
-
- /*
- * This hardware doesn't have TX-done notifications, so we'll try and
- * emulate it the best we can using ECHO skbs. Get the next TX
- * descriptor, and see if we have room to send. If not, stop the queue.
- * It will be woken when the ECHO skb for the current packet is recv'd.
- */
-
- /* copy the control bits of the descriptor */
+ /* if there is no free descriptor space, stop the transmit queue */
if (!ican3_txok(mod))
netif_stop_queue(ndev);
@@ -1490,7 +1617,7 @@ static const struct net_device_ops ican3_netdev_ops = {
*/
/* This structure was stolen from drivers/net/can/sja1000/sja1000.c */
-static struct can_bittiming_const ican3_bittiming_const = {
+static const struct can_bittiming_const ican3_bittiming_const = {
.name = DRV_NAME,
.tseg1_min = 1,
.tseg1_max = 16,
@@ -1667,6 +1794,7 @@ static int __devinit ican3_probe(struct platform_device *pdev)
mod->dev = &pdev->dev;
mod->num = pdata->modno;
netif_napi_add(ndev, &mod->napi, ican3_napi, ICAN3_RX_BUFFERS);
+ skb_queue_head_init(&mod->echoq);
spin_lock_init(&mod->lock);
init_completion(&mod->termination_comp);
init_completion(&mod->buserror_comp);
@@ -1687,7 +1815,8 @@ static int __devinit ican3_probe(struct platform_device *pdev)
mod->can.do_set_mode = ican3_set_mode;
mod->can.do_get_berr_counter = ican3_get_berr_counter;
mod->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES
- | CAN_CTRLMODE_BERR_REPORTING;
+ | CAN_CTRLMODE_BERR_REPORTING
+ | CAN_CTRLMODE_ONE_SHOT;
/* find our IRQ number */
mod->irq = platform_get_irq(pdev, 0);
diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c
index 346785c56a25..a580db29e503 100644
--- a/drivers/net/can/mcp251x.c
+++ b/drivers/net/can/mcp251x.c
@@ -214,7 +214,7 @@ static int mcp251x_enable_dma; /* Enable SPI DMA. Default: 0 (Off) */
module_param(mcp251x_enable_dma, int, S_IRUGO);
MODULE_PARM_DESC(mcp251x_enable_dma, "Enable SPI DMA. Default: 0 (Off)");
-static struct can_bittiming_const mcp251x_bittiming_const = {
+static const struct can_bittiming_const mcp251x_bittiming_const = {
.name = DEVICE_NAME,
.tseg1_min = 3,
.tseg1_max = 16,
@@ -1020,8 +1020,7 @@ static int __devinit mcp251x_can_probe(struct spi_device *spi)
GFP_DMA);
if (priv->spi_tx_buf) {
- priv->spi_rx_buf = (u8 *)(priv->spi_tx_buf +
- (PAGE_SIZE / 2));
+ priv->spi_rx_buf = (priv->spi_tx_buf + (PAGE_SIZE / 2));
priv->spi_rx_dma = (dma_addr_t)(priv->spi_tx_dma +
(PAGE_SIZE / 2));
} else {
diff --git a/drivers/net/can/mscan/mpc5xxx_can.c b/drivers/net/can/mscan/mpc5xxx_can.c
index 5caa572d71e3..06adf881ea24 100644
--- a/drivers/net/can/mscan/mpc5xxx_can.c
+++ b/drivers/net/can/mscan/mpc5xxx_can.c
@@ -251,7 +251,7 @@ static struct of_device_id mpc5xxx_can_table[];
static int __devinit mpc5xxx_can_probe(struct platform_device *ofdev)
{
const struct of_device_id *match;
- struct mpc5xxx_can_data *data;
+ const struct mpc5xxx_can_data *data;
struct device_node *np = ofdev->dev.of_node;
struct net_device *dev;
struct mscan_priv *priv;
diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c
index 41a2a2dda7ea..2b104d5f422c 100644
--- a/drivers/net/can/mscan/mscan.c
+++ b/drivers/net/can/mscan/mscan.c
@@ -34,7 +34,7 @@
#include "mscan.h"
-static struct can_bittiming_const mscan_bittiming_const = {
+static const struct can_bittiming_const mscan_bittiming_const = {
.name = "mscan",
.tseg1_min = 4,
.tseg1_max = 16,
diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c
index 1226297e7676..48b3d62b34cb 100644
--- a/drivers/net/can/pch_can.c
+++ b/drivers/net/can/pch_can.c
@@ -184,7 +184,7 @@ struct pch_can_priv {
int use_msi;
};
-static struct can_bittiming_const pch_can_bittiming_const = {
+static const struct can_bittiming_const pch_can_bittiming_const = {
.name = KBUILD_MODNAME,
.tseg1_min = 2,
.tseg1_max = 16,
diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
index 5e10472371ed..4c4f33d482d2 100644
--- a/drivers/net/can/sja1000/sja1000.c
+++ b/drivers/net/can/sja1000/sja1000.c
@@ -69,7 +69,7 @@ MODULE_AUTHOR("Oliver Hartkopp <oliver.hartkopp@volkswagen.de>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION(DRV_NAME "CAN netdevice driver");
-static struct can_bittiming_const sja1000_bittiming_const = {
+static const struct can_bittiming_const sja1000_bittiming_const = {
.name = DRV_NAME,
.tseg1_min = 1,
.tseg1_max = 16,
diff --git a/drivers/net/can/softing/softing_main.c b/drivers/net/can/softing/softing_main.c
index a7c77c744ee9..f2a221e7b968 100644
--- a/drivers/net/can/softing/softing_main.c
+++ b/drivers/net/can/softing/softing_main.c
@@ -826,12 +826,12 @@ static __devinit int softing_pdev_probe(struct platform_device *pdev)
goto sysfs_failed;
}
- ret = -ENOMEM;
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
card->net[j] = netdev =
softing_netdev_create(card, card->id.chip[j]);
if (!netdev) {
dev_alert(&pdev->dev, "failed to make can[%i]", j);
+ ret = -ENOMEM;
goto netdev_failed;
}
priv = netdev_priv(card->net[j]);
diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index 4accd7ec6954..527dbcf95335 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -196,7 +196,7 @@ MODULE_VERSION(HECC_MODULE_VERSION);
#define HECC_CANGIM_SIL BIT(2) /* system interrupts to int line 1 */
/* CAN Bittiming constants as per HECC specs */
-static struct can_bittiming_const ti_hecc_bittiming_const = {
+static const struct can_bittiming_const ti_hecc_bittiming_const = {
.name = DRV_NAME,
.tseg1_min = 1,
.tseg1_max = 16,
diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c
index 7ae65fc80032..086fa321677a 100644
--- a/drivers/net/can/usb/ems_usb.c
+++ b/drivers/net/can/usb/ems_usb.c
@@ -889,7 +889,7 @@ static const struct net_device_ops ems_usb_netdev_ops = {
.ndo_start_xmit = ems_usb_start_xmit,
};
-static struct can_bittiming_const ems_usb_bittiming_const = {
+static const struct can_bittiming_const ems_usb_bittiming_const = {
.name = "ems_usb",
.tseg1_min = 1,
.tseg1_max = 16,
diff --git a/drivers/net/can/usb/esd_usb2.c b/drivers/net/can/usb/esd_usb2.c
index 09b1da5bc512..bd36e5517173 100644
--- a/drivers/net/can/usb/esd_usb2.c
+++ b/drivers/net/can/usb/esd_usb2.c
@@ -871,7 +871,7 @@ static const struct net_device_ops esd_usb2_netdev_ops = {
.ndo_start_xmit = esd_usb2_start_xmit,
};
-static struct can_bittiming_const esd_usb2_bittiming_const = {
+static const struct can_bittiming_const esd_usb2_bittiming_const = {
.name = "esd_usb2",
.tseg1_min = ESD_USB2_TSEG1_MIN,
.tseg1_max = ESD_USB2_TSEG1_MAX,
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.h b/drivers/net/can/usb/peak_usb/pcan_usb_core.h
index a948c5a89401..4c775b620be2 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.h
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.h
@@ -45,7 +45,7 @@ struct peak_usb_adapter {
char *name;
u32 device_id;
struct can_clock clock;
- struct can_bittiming_const bittiming_const;
+ const struct can_bittiming_const bittiming_const;
unsigned int ctrl_count;
int (*intf_probe)(struct usb_interface *intf);
diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c
index ea2d94285936..4f93c0be0053 100644
--- a/drivers/net/can/vcan.c
+++ b/drivers/net/can/vcan.c
@@ -70,13 +70,12 @@ 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 canfd_frame *cfd = (struct canfd_frame *)skb->data;
struct net_device_stats *stats = &dev->stats;
stats->rx_packets++;
- stats->rx_bytes += cf->can_dlc;
+ stats->rx_bytes += cfd->len;
- skb->protocol = htons(ETH_P_CAN);
skb->pkt_type = PACKET_BROADCAST;
skb->dev = dev;
skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -86,7 +85,7 @@ 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 canfd_frame *cfd = (struct canfd_frame *)skb->data;
struct net_device_stats *stats = &dev->stats;
int loop;
@@ -94,7 +93,7 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
stats->tx_packets++;
- stats->tx_bytes += cf->can_dlc;
+ stats->tx_bytes += cfd->len;
/* set flag whether this packet has to be looped back */
loop = skb->pkt_type == PACKET_LOOPBACK;
@@ -108,7 +107,7 @@ 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 += cf->can_dlc;
+ stats->rx_bytes += cfd->len;
}
kfree_skb(skb);
return NETDEV_TX_OK;
@@ -133,14 +132,28 @@ static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
+static int vcan_change_mtu(struct net_device *dev, int new_mtu)
+{
+ /* Do not allow changing the MTU while running */
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU)
+ return -EINVAL;
+
+ dev->mtu = new_mtu;
+ return 0;
+}
+
static const struct net_device_ops vcan_netdev_ops = {
.ndo_start_xmit = vcan_tx,
+ .ndo_change_mtu = vcan_change_mtu,
};
static void vcan_setup(struct net_device *dev)
{
dev->type = ARPHRD_CAN;
- dev->mtu = sizeof(struct can_frame);
+ dev->mtu = CAN_MTU;
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->tx_queue_len = 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 15:36:41 +0000