5 files changed, 133 insertions, 13 deletions

diff --git a/include/linux/can/core.h b/include/linux/can/core.h
index 25085cbadcfc..6c507bea275f 100644
--- a/include/linux/can/core.h
+++ b/include/linux/can/core.h
@@ -32,14 +32,12 @@
  * struct can_proto - CAN protocol structure
  * @type:       type argument in socket() syscall, e.g. SOCK_DGRAM.
  * @protocol:   protocol number in socket() syscall.
- * @capability: capability needed to open the socket, or -1 for no restriction.
  * @ops:        pointer to struct proto_ops for sock->ops.
  * @prot:       pointer to struct proto structure.
  */
 struct can_proto {
         int              type;
         int              protocol;
-        int              capability;
         struct proto_ops *ops;
         struct proto     *prot;
 };
diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index 5824b20b5fcb..6e5a7f00223d 100644
--- a/include/linux/can/dev.h
+++ b/include/linux/can/dev.h
@@ -29,8 +29,6 @@ enum can_mode {
 /*
  * CAN common private data
  */
-#define CAN_ECHO_SKB_MAX  4
-
 struct can_priv {
         struct can_device_stats can_stats;
 
@@ -40,19 +38,47 @@ struct can_priv {
 
         enum can_state state;
         u32 ctrlmode;
+        u32 ctrlmode_supported;
 
         int restart_ms;
         struct timer_list restart_timer;
 
-        struct sk_buff *echo_skb[CAN_ECHO_SKB_MAX];
-
         int (*do_set_bittiming)(struct net_device *dev);
         int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
         int (*do_get_state)(const struct net_device *dev,
                             enum can_state *state);
+        int (*do_get_berr_counter)(const struct net_device *dev,
+                                   struct can_berr_counter *bec);
+
+        unsigned int echo_skb_max;
+        struct sk_buff **echo_skb;
 };
 
-struct net_device *alloc_candev(int sizeof_priv);
+/*
+ * get_can_dlc(value) - helper macro to cast a given data length code (dlc)
+ * to __u8 and ensure the dlc value to be max. 8 bytes.
+ *
+ * To be used in the CAN netdriver receive path to ensure conformance with
+ * ISO 11898-1 Chapter 8.4.2.3 (DLC field)
+ */
+#define get_can_dlc(i)  (min_t(__u8, (i), 8))
+
+/* Drop a given socketbuffer if it does not contain a valid CAN frame. */
+static inline int can_dropped_invalid_skb(struct net_device *dev,
+                                          struct sk_buff *skb)
+{
+        const struct can_frame *cf = (struct can_frame *)skb->data;
+
+        if (unlikely(skb->len != sizeof(*cf) || cf->can_dlc > 8)) {
+                kfree_skb(skb);
+                dev->stats.tx_dropped++;
+                return 1;
+        }
+
+        return 0;
+}
+
+struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
 void free_candev(struct net_device *dev);
 
 int open_candev(struct net_device *dev);
@@ -64,8 +90,13 @@ void unregister_candev(struct net_device *dev);
 int can_restart_now(struct net_device *dev);
 void can_bus_off(struct net_device *dev);
 
-void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, int idx);
-void can_get_echo_skb(struct net_device *dev, int idx);
-void can_free_echo_skb(struct net_device *dev, int idx);
+void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
+                      unsigned int idx);
+void can_get_echo_skb(struct net_device *dev, unsigned int idx);
+void can_free_echo_skb(struct net_device *dev, unsigned int idx);
+
+struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);
+struct sk_buff *alloc_can_err_skb(struct net_device *dev,
+                                  struct can_frame **cf);
 
 #endif /* CAN_DEV_H */
diff --git a/include/linux/can/netlink.h b/include/linux/can/netlink.h
index 9ecbb7871c0e..3250de935e1a 100644
--- a/include/linux/can/netlink.h
+++ b/include/linux/can/netlink.h
@@ -70,6 +70,14 @@ enum can_state {
 };
 
 /*
+ * CAN bus error counters
+ */
+struct can_berr_counter {
+        __u16 txerr;
+        __u16 rxerr;
+};
+
+/*
  * CAN controller mode
  */
 struct can_ctrlmode {
@@ -77,9 +85,11 @@ struct can_ctrlmode {
         __u32 flags;
 };
 
-#define CAN_CTRLMODE_LOOPBACK   0x1     /* Loopback mode */
-#define CAN_CTRLMODE_LISTENONLY 0x2     /* Listen-only mode */
-#define CAN_CTRLMODE_3_SAMPLES  0x4     /* Triple sampling mode */
+#define CAN_CTRLMODE_LOOPBACK           0x01    /* Loopback mode */
+#define CAN_CTRLMODE_LISTENONLY         0x02    /* Listen-only mode */
+#define CAN_CTRLMODE_3_SAMPLES          0x04    /* Triple sampling mode */
+#define CAN_CTRLMODE_ONE_SHOT           0x08    /* One-Shot mode */
+#define CAN_CTRLMODE_BERR_REPORTING     0x10    /* Bus-error reporting */
 
 /*
  * CAN device statistics
@@ -105,6 +115,7 @@ enum {
         IFLA_CAN_CTRLMODE,
         IFLA_CAN_RESTART_MS,
         IFLA_CAN_RESTART,
+        IFLA_CAN_BERR_COUNTER,
         __IFLA_CAN_MAX
 };
 
diff --git a/include/linux/can/platform/mcp251x.h b/include/linux/can/platform/mcp251x.h
new file mode 100644
index 000000000000..1448177d86d5
--- /dev/null
+++ b/include/linux/can/platform/mcp251x.h
@@ -0,0 +1,36 @@
+#ifndef __CAN_PLATFORM_MCP251X_H__
+#define __CAN_PLATFORM_MCP251X_H__
+
+/*
+ *
+ * CAN bus driver for Microchip 251x CAN Controller with SPI Interface
+ *
+ */
+
+#include <linux/spi/spi.h>
+
+/**
+ * struct mcp251x_platform_data - MCP251X SPI CAN controller platform data
+ * @oscillator_frequency:       - oscillator frequency in Hz
+ * @model:                      - actual type of chip
+ * @board_specific_setup:       - called before probing the chip (power,reset)
+ * @transceiver_enable:         - called to power on/off the transceiver
+ * @power_enable:               - called to power on/off the mcp *and* the
+ *                                transceiver
+ *
+ * Please note that you should define power_enable or transceiver_enable or
+ * none of them. Defining both of them is no use.
+ *
+ */
+
+struct mcp251x_platform_data {
+        unsigned long oscillator_frequency;
+        int model;
+#define CAN_MCP251X_MCP2510 0
+#define CAN_MCP251X_MCP2515 1
+        int (*board_specific_setup)(struct spi_device *spi);
+        int (*transceiver_enable)(int enable);
+        int (*power_enable) (int enable);
+};
+
+#endif /* __CAN_PLATFORM_MCP251X_H__ */
diff --git a/include/linux/can/platform/ti_hecc.h b/include/linux/can/platform/ti_hecc.h
new file mode 100644
index 000000000000..af17cb3f7a84
--- /dev/null
+++ b/include/linux/can/platform/ti_hecc.h
@@ -0,0 +1,44 @@
+#ifndef __CAN_PLATFORM_TI_HECC_H__
+#define __CAN_PLATFORM_TI_HECC_H__
+
+/*
+ * TI HECC (High End CAN Controller) driver platform header
+ *
+ * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed as is WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/**
+ * struct hecc_platform_data - HECC Platform Data
+ *
+ * @scc_hecc_offset:    mostly 0 - should really never change
+ * @scc_ram_offset:     SCC RAM offset
+ * @hecc_ram_offset:    HECC RAM offset
+ * @mbx_offset:         Mailbox RAM offset
+ * @int_line:           Interrupt line to use - 0 or 1
+ * @version:            version for future use
+ * @transceiver_switch: platform specific callback fn for transceiver control
+ *
+ * Platform data structure to get all platform specific settings.
+ * this structure also accounts the fact that the IP may have different
+ * RAM and mailbox offsets for different SOC's
+ */
+struct ti_hecc_platform_data {
+        u32 scc_hecc_offset;
+        u32 scc_ram_offset;
+        u32 hecc_ram_offset;
+        u32 mbx_offset;
+        u32 int_line;
+        u32 version;
+        void (*transceiver_switch) (int);
+};
+#endif