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-rw-r--r--kernel/include/linux/can/core.h61
-rw-r--r--kernel/include/linux/can/dev.h146
-rw-r--r--kernel/include/linux/can/led.h53
-rw-r--r--kernel/include/linux/can/platform/cc770.h33
-rw-r--r--kernel/include/linux/can/platform/mcp251x.h21
-rw-r--r--kernel/include/linux/can/platform/rcar_can.h17
-rw-r--r--kernel/include/linux/can/platform/sja1000.h35
-rw-r--r--kernel/include/linux/can/platform/ti_hecc.h44
-rw-r--r--kernel/include/linux/can/skb.h78
9 files changed, 488 insertions, 0 deletions
diff --git a/kernel/include/linux/can/core.h b/kernel/include/linux/can/core.h
new file mode 100644
index 000000000..a0875001b
--- /dev/null
+++ b/kernel/include/linux/can/core.h
@@ -0,0 +1,61 @@
+/*
+ * linux/can/core.h
+ *
+ * Protoypes and definitions for CAN protocol modules using the PF_CAN core
+ *
+ * Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
+ * Urs Thuermann <urs.thuermann@volkswagen.de>
+ * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
+ * All rights reserved.
+ *
+ */
+
+#ifndef _CAN_CORE_H
+#define _CAN_CORE_H
+
+#include <linux/can.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+
+#define CAN_VERSION "20120528"
+
+/* increment this number each time you change some user-space interface */
+#define CAN_ABI_VERSION "9"
+
+#define CAN_VERSION_STRING "rev " CAN_VERSION " abi " CAN_ABI_VERSION
+
+#define DNAME(dev) ((dev) ? (dev)->name : "any")
+
+/**
+ * struct can_proto - CAN protocol structure
+ * @type: type argument in socket() syscall, e.g. SOCK_DGRAM.
+ * @protocol: protocol number in socket() syscall.
+ * @ops: pointer to struct proto_ops for sock->ops.
+ * @prot: pointer to struct proto structure.
+ */
+struct can_proto {
+ int type;
+ int protocol;
+ const struct proto_ops *ops;
+ struct proto *prot;
+};
+
+/* function prototypes for the CAN networklayer core (af_can.c) */
+
+extern int can_proto_register(const struct can_proto *cp);
+extern void can_proto_unregister(const struct can_proto *cp);
+
+extern int can_rx_register(struct net_device *dev, canid_t can_id,
+ canid_t mask,
+ void (*func)(struct sk_buff *, void *),
+ void *data, char *ident);
+
+extern void can_rx_unregister(struct net_device *dev, canid_t can_id,
+ canid_t mask,
+ void (*func)(struct sk_buff *, void *),
+ void *data);
+
+extern int can_send(struct sk_buff *skb, int loop);
+extern int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+
+#endif /* !_CAN_CORE_H */
diff --git a/kernel/include/linux/can/dev.h b/kernel/include/linux/can/dev.h
new file mode 100644
index 000000000..c3a9c8fc6
--- /dev/null
+++ b/kernel/include/linux/can/dev.h
@@ -0,0 +1,146 @@
+/*
+ * linux/can/dev.h
+ *
+ * Definitions for the CAN network device driver interface
+ *
+ * Copyright (C) 2006 Andrey Volkov <avolkov@varma-el.com>
+ * Varma Electronics Oy
+ *
+ * Copyright (C) 2008 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ */
+
+#ifndef _CAN_DEV_H
+#define _CAN_DEV_H
+
+#include <linux/can.h>
+#include <linux/can/netlink.h>
+#include <linux/can/error.h>
+#include <linux/can/led.h>
+
+/*
+ * CAN mode
+ */
+enum can_mode {
+ CAN_MODE_STOP = 0,
+ CAN_MODE_START,
+ CAN_MODE_SLEEP
+};
+
+/*
+ * CAN common private data
+ */
+struct can_priv {
+ struct can_device_stats can_stats;
+
+ struct can_bittiming bittiming, data_bittiming;
+ const struct can_bittiming_const *bittiming_const,
+ *data_bittiming_const;
+ struct can_clock clock;
+
+ enum can_state state;
+ u32 ctrlmode;
+ u32 ctrlmode_supported;
+
+ int restart_ms;
+ struct timer_list restart_timer;
+
+ int (*do_set_bittiming)(struct net_device *dev);
+ int (*do_set_data_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;
+
+#ifdef CONFIG_CAN_LEDS
+ struct led_trigger *tx_led_trig;
+ char tx_led_trig_name[CAN_LED_NAME_SZ];
+ struct led_trigger *rx_led_trig;
+ char rx_led_trig_name[CAN_LED_NAME_SZ];
+ struct led_trigger *rxtx_led_trig;
+ char rxtx_led_trig_name[CAN_LED_NAME_SZ];
+#endif
+};
+
+/*
+ * 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), CAN_MAX_DLC))
+#define get_canfd_dlc(i) (min_t(__u8, (i), CANFD_MAX_DLC))
+
+/* 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 canfd_frame *cfd = (struct canfd_frame *)skb->data;
+
+ if (skb->protocol == htons(ETH_P_CAN)) {
+ if (unlikely(skb->len != CAN_MTU ||
+ cfd->len > CAN_MAX_DLEN))
+ goto inval_skb;
+ } else if (skb->protocol == htons(ETH_P_CANFD)) {
+ if (unlikely(skb->len != CANFD_MTU ||
+ cfd->len > CANFD_MAX_DLEN))
+ goto inval_skb;
+ } else
+ goto inval_skb;
+
+ return 0;
+
+inval_skb:
+ kfree_skb(skb);
+ dev->stats.tx_dropped++;
+ return 1;
+}
+
+static inline bool can_is_canfd_skb(const struct sk_buff *skb)
+{
+ /* the CAN specific type of skb is identified by its data length */
+ return skb->len == CANFD_MTU;
+}
+
+/* get data length from can_dlc with sanitized can_dlc */
+u8 can_dlc2len(u8 can_dlc);
+
+/* map the sanitized data length to an appropriate data length code */
+u8 can_len2dlc(u8 len);
+
+struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
+void free_candev(struct net_device *dev);
+
+/* a candev safe wrapper around netdev_priv */
+struct can_priv *safe_candev_priv(struct net_device *dev);
+
+int open_candev(struct net_device *dev);
+void close_candev(struct net_device *dev);
+int can_change_mtu(struct net_device *dev, int new_mtu);
+
+int register_candev(struct net_device *dev);
+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_change_state(struct net_device *dev, struct can_frame *cf,
+ enum can_state tx_state, enum can_state rx_state);
+
+void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
+ unsigned int idx);
+unsigned int 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_canfd_skb(struct net_device *dev,
+ struct canfd_frame **cfd);
+struct sk_buff *alloc_can_err_skb(struct net_device *dev,
+ struct can_frame **cf);
+
+#endif /* !_CAN_DEV_H */
diff --git a/kernel/include/linux/can/led.h b/kernel/include/linux/can/led.h
new file mode 100644
index 000000000..146de4506
--- /dev/null
+++ b/kernel/include/linux/can/led.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2012, Fabio Baltieri <fabio.baltieri@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _CAN_LED_H
+#define _CAN_LED_H
+
+#include <linux/if.h>
+#include <linux/leds.h>
+
+enum can_led_event {
+ CAN_LED_EVENT_OPEN,
+ CAN_LED_EVENT_STOP,
+ CAN_LED_EVENT_TX,
+ CAN_LED_EVENT_RX,
+};
+
+#ifdef CONFIG_CAN_LEDS
+
+/* keep space for interface name + "-tx"/"-rx"/"-rxtx"
+ * suffix and null terminator
+ */
+#define CAN_LED_NAME_SZ (IFNAMSIZ + 6)
+
+void can_led_event(struct net_device *netdev, enum can_led_event event);
+void devm_can_led_init(struct net_device *netdev);
+int __init can_led_notifier_init(void);
+void __exit can_led_notifier_exit(void);
+
+#else
+
+static inline void can_led_event(struct net_device *netdev,
+ enum can_led_event event)
+{
+}
+static inline void devm_can_led_init(struct net_device *netdev)
+{
+}
+static inline int can_led_notifier_init(void)
+{
+ return 0;
+}
+static inline void can_led_notifier_exit(void)
+{
+}
+
+#endif
+
+#endif /* !_CAN_LED_H */
diff --git a/kernel/include/linux/can/platform/cc770.h b/kernel/include/linux/can/platform/cc770.h
new file mode 100644
index 000000000..78b2d44f0
--- /dev/null
+++ b/kernel/include/linux/can/platform/cc770.h
@@ -0,0 +1,33 @@
+#ifndef _CAN_PLATFORM_CC770_H
+#define _CAN_PLATFORM_CC770_H
+
+/* CPU Interface Register (0x02) */
+#define CPUIF_CEN 0x01 /* Clock Out Enable */
+#define CPUIF_MUX 0x04 /* Multiplex */
+#define CPUIF_SLP 0x08 /* Sleep */
+#define CPUIF_PWD 0x10 /* Power Down Mode */
+#define CPUIF_DMC 0x20 /* Divide Memory Clock */
+#define CPUIF_DSC 0x40 /* Divide System Clock */
+#define CPUIF_RST 0x80 /* Hardware Reset Status */
+
+/* Clock Out Register (0x1f) */
+#define CLKOUT_CD_MASK 0x0f /* Clock Divider mask */
+#define CLKOUT_SL_MASK 0x30 /* Slew Rate mask */
+#define CLKOUT_SL_SHIFT 4
+
+/* Bus Configuration Register (0x2f) */
+#define BUSCFG_DR0 0x01 /* Disconnect RX0 Input / Select RX input */
+#define BUSCFG_DR1 0x02 /* Disconnect RX1 Input / Silent mode */
+#define BUSCFG_DT1 0x08 /* Disconnect TX1 Output */
+#define BUSCFG_POL 0x20 /* Polarity dominant or recessive */
+#define BUSCFG_CBY 0x40 /* Input Comparator Bypass */
+
+struct cc770_platform_data {
+ u32 osc_freq; /* CAN bus oscillator frequency in Hz */
+
+ u8 cir; /* CPU Interface Register */
+ u8 cor; /* Clock Out Register */
+ u8 bcr; /* Bus Configuration Register */
+};
+
+#endif /* !_CAN_PLATFORM_CC770_H */
diff --git a/kernel/include/linux/can/platform/mcp251x.h b/kernel/include/linux/can/platform/mcp251x.h
new file mode 100644
index 000000000..d44fcae27
--- /dev/null
+++ b/kernel/include/linux/can/platform/mcp251x.h
@@ -0,0 +1,21 @@
+#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
+ */
+
+struct mcp251x_platform_data {
+ unsigned long oscillator_frequency;
+};
+
+#endif /* !_CAN_PLATFORM_MCP251X_H */
diff --git a/kernel/include/linux/can/platform/rcar_can.h b/kernel/include/linux/can/platform/rcar_can.h
new file mode 100644
index 000000000..0f4a2f3df
--- /dev/null
+++ b/kernel/include/linux/can/platform/rcar_can.h
@@ -0,0 +1,17 @@
+#ifndef _CAN_PLATFORM_RCAR_CAN_H_
+#define _CAN_PLATFORM_RCAR_CAN_H_
+
+#include <linux/types.h>
+
+/* Clock Select Register settings */
+enum CLKR {
+ CLKR_CLKP1 = 0, /* Peripheral clock (clkp1) */
+ CLKR_CLKP2 = 1, /* Peripheral clock (clkp2) */
+ CLKR_CLKEXT = 3 /* Externally input clock */
+};
+
+struct rcar_can_platform_data {
+ enum CLKR clock_select; /* Clock source select */
+};
+
+#endif /* !_CAN_PLATFORM_RCAR_CAN_H_ */
diff --git a/kernel/include/linux/can/platform/sja1000.h b/kernel/include/linux/can/platform/sja1000.h
new file mode 100644
index 000000000..93570b61e
--- /dev/null
+++ b/kernel/include/linux/can/platform/sja1000.h
@@ -0,0 +1,35 @@
+#ifndef _CAN_PLATFORM_SJA1000_H
+#define _CAN_PLATFORM_SJA1000_H
+
+/* clock divider register */
+#define CDR_CLKOUT_MASK 0x07
+#define CDR_CLK_OFF 0x08 /* Clock off (CLKOUT pin) */
+#define CDR_RXINPEN 0x20 /* TX1 output is RX irq output */
+#define CDR_CBP 0x40 /* CAN input comparator bypass */
+#define CDR_PELICAN 0x80 /* PeliCAN mode */
+
+/* output control register */
+#define OCR_MODE_BIPHASE 0x00
+#define OCR_MODE_TEST 0x01
+#define OCR_MODE_NORMAL 0x02
+#define OCR_MODE_CLOCK 0x03
+#define OCR_MODE_MASK 0x07
+#define OCR_TX0_INVERT 0x04
+#define OCR_TX0_PULLDOWN 0x08
+#define OCR_TX0_PULLUP 0x10
+#define OCR_TX0_PUSHPULL 0x18
+#define OCR_TX1_INVERT 0x20
+#define OCR_TX1_PULLDOWN 0x40
+#define OCR_TX1_PULLUP 0x80
+#define OCR_TX1_PUSHPULL 0xc0
+#define OCR_TX_MASK 0xfc
+#define OCR_TX_SHIFT 2
+
+struct sja1000_platform_data {
+ u32 osc_freq; /* CAN bus oscillator frequency in Hz */
+
+ u8 ocr; /* output control register */
+ u8 cdr; /* clock divider register */
+};
+
+#endif /* !_CAN_PLATFORM_SJA1000_H */
diff --git a/kernel/include/linux/can/platform/ti_hecc.h b/kernel/include/linux/can/platform/ti_hecc.h
new file mode 100644
index 000000000..a52f47ca6
--- /dev/null
+++ b/kernel/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 /* !_CAN_PLATFORM_TI_HECC_H */
diff --git a/kernel/include/linux/can/skb.h b/kernel/include/linux/can/skb.h
new file mode 100644
index 000000000..b6a52a4b4
--- /dev/null
+++ b/kernel/include/linux/can/skb.h
@@ -0,0 +1,78 @@
+/*
+ * linux/can/skb.h
+ *
+ * Definitions for the CAN network socket buffer
+ *
+ * Copyright (C) 2012 Oliver Hartkopp <socketcan@hartkopp.net>
+ *
+ */
+
+#ifndef _CAN_SKB_H
+#define _CAN_SKB_H
+
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/can.h>
+#include <net/sock.h>
+
+/*
+ * The struct can_skb_priv is used to transport additional information along
+ * with the stored struct can(fd)_frame that can not be contained in existing
+ * struct sk_buff elements.
+ * N.B. that this information must not be modified in cloned CAN sk_buffs.
+ * To modify the CAN frame content or the struct can_skb_priv content
+ * skb_copy() needs to be used instead of skb_clone().
+ */
+
+/**
+ * struct can_skb_priv - private additional data inside CAN sk_buffs
+ * @ifindex: ifindex of the first interface the CAN frame appeared on
+ * @cf: align to the following CAN frame at skb->data
+ */
+struct can_skb_priv {
+ int ifindex;
+ struct can_frame cf[0];
+};
+
+static inline struct can_skb_priv *can_skb_prv(struct sk_buff *skb)
+{
+ return (struct can_skb_priv *)(skb->head);
+}
+
+static inline void can_skb_reserve(struct sk_buff *skb)
+{
+ skb_reserve(skb, sizeof(struct can_skb_priv));
+}
+
+static inline void can_skb_set_owner(struct sk_buff *skb, struct sock *sk)
+{
+ if (sk) {
+ sock_hold(sk);
+ skb->destructor = sock_efree;
+ skb->sk = sk;
+ }
+}
+
+/*
+ * returns an unshared skb owned by the original sock to be echo'ed back
+ */
+static inline struct sk_buff *can_create_echo_skb(struct sk_buff *skb)
+{
+ if (skb_shared(skb)) {
+ struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC);
+
+ if (likely(nskb)) {
+ can_skb_set_owner(nskb, skb->sk);
+ consume_skb(skb);
+ return nskb;
+ } else {
+ kfree_skb(skb);
+ return NULL;
+ }
+ }
+
+ /* we can assume to have an unshared skb with proper owner */
+ return skb;
+}
+
+#endif /* !_CAN_SKB_H */