* Rewritten for new CAN queues by Pavel Pisa - OCERA team member
* email:pisa@cmp.felk.cvut.cz
* This software is released under the GPL-License.
- * Version lincan-0.2 9 Jul 2003
+ * Version lincan-0.3 17 Jun 2004
*/
#include "./can.h"
#include "./can_queue.h"
#ifdef CAN_DEBUG
- #define DEBUGMSG(fmt,args...) can_printk(KERN_ERR "can.o (debug): " fmt,\
+ #define DEBUGMSG(fmt,args...) can_printk(KERN_ERR "lincan (debug): " fmt,\
##args)
#else
#define DEBUGMSG(fmt,args...)
#endif
-#define CANMSG(fmt,args...) can_printk(KERN_ERR "can.o: " fmt,##args)
+#define CANMSG(fmt,args...) can_printk(KERN_ERR "lincan: " fmt,##args)
extern can_spinlock_t canuser_manipulation_lock;
* @flags: board flags: %PROGRAMMABLE_IRQ .. interrupt number
* can be programmed into board
* @nr_all_chips: number of chips present on the board
- * @nr_82527_chips: number of Intel 8257 chips
+ * @nr_82527_chips: number of Intel 8257 chips
* @nr_sja1000_chips: number of Philips SJA100 chips
* @chip: array of pointers to the chip structures
* @hwspecops: pointer to board specific operations
* @hosthardware_p: pointer to the root hardware structure
+ * @sysdevptr: union reserved for pointer to bus specific
+ * device structure (case @pcidev is used for PCI devices)
*
* The structure represent configuration and state of associated board.
* The driver infrastructure prepares this structure and calls
char *hwname; /* text board type */
int candev_idx; /* board index in canhardware_t.candevice[] */
unsigned long io_addr; /* IO/physical MEM address */
- unsigned long res_addr; /* optional seset register port */
- unsigned long dev_base_addr; /* CPU translated IO/virtual MEM address */
+ unsigned long res_addr; /* optional reset register port */
+ can_ioptr_t dev_base_addr; /* CPU translated IO/virtual MEM address */
+ can_ioptr_t aux_base_addr; /* CPU translated IO/virtual MEM address */
unsigned int flags;
int nr_all_chips;
int nr_82527_chips;
int nr_sja1000_chips;
- struct chip_t *chip[MAX_HW_CHIPS];
+ can_spinlock_t device_lock;
+ struct canchip_t *chip[MAX_HW_CHIPS];
struct hwspecops_t *hwspecops;
struct canhardware_t *hosthardware_p;
-
+
union {
+ void *anydev;
#ifdef CAN_ENABLE_PCI_SUPPORT
struct pci_dev *pcidev;
#endif /*CAN_ENABLE_PCI_SUPPORT*/
};
/**
- * struct chip_t - CAN chip state and type information
+ * struct canchip_t - CAN chip state and type information
* @chip_type: text string describing chip type
* @chip_idx: index of the chip in candevice_t.chip[] array
* @chip_irq: chip interrupt number if any
* %CHIP_SEGMENTED .. access to the chip is segmented (mainly for i82527 chips)
* @clock: chip base clock frequency in Hz
* @baudrate: selected chip baudrate in Hz
- * @write_register: write chip register function copy -
+ * @write_register: write chip register function copy
* @read_register: read chip register function copy
+ * @chip_data: pointer for optional chip specific data extension
* @sja_cdr_reg: SJA specific register -
* holds hardware specific options for the Clock Divider
* register. Options defined in the sja1000.h file:
* @chipspecops: pointer to the set of chip specific object filled by init_chip_data() function
* @hostdevice: pointer to chip hosting board
* @max_objects: maximal number of communication objects connected to this chip
+ * @chip_lock: reserved for synchronization of the chip supporting routines
+ * (not used in the current driver version)
+ * @worker_thread: chip worker thread ID (RT-Linux specific field)
+ * @pend_flags: holds information about pending interrupt and tx_wake() operations
+ * (RT-Linux specific field). Masks values:
+ * %MSGOBJ_TX_REQUEST .. some of the message objects requires tx_wake() call,
+ * %MSGOBJ_IRQ_REQUEST .. chip interrupt processing required
+ * %MSGOBJ_WORKER_WAKE .. marks, that worker thread should be waked
+ * for some of above reasons
*
* The fields @write_register and @read_register are copied from
* corresponding fields from @hwspecops structure
- * (chip->hostdevice->hwspecops->write_register and
+ * (chip->hostdevice->hwspecops->write_register and
* chip->hostdevice->hwspecops->read_register)
* to speedup can_write_reg() and can_read_reg() functions.
*/
-struct chip_t {
+struct canchip_t {
char *chip_type;
int chip_idx; /* chip index in candevice_t.chip[] */
int chip_irq;
- unsigned long chip_base_addr;
+ can_ioptr_t chip_base_addr;
unsigned int flags;
long clock; /* Chip clock in Hz */
long baudrate;
- void (*write_register)(unsigned char data,unsigned long address);
- unsigned (*read_register)(unsigned long address);
+ void (*write_register)(unsigned data, can_ioptr_t address);
+ unsigned (*read_register)(can_ioptr_t address);
+
+ void *chip_data;
unsigned short sja_cdr_reg; /* sja1000 only! */
unsigned short sja_ocr_reg; /* sja1000 only! */
struct chipspecops_t *chipspecops;
struct candevice_t *hostdevice;
-
+
int max_objects; /* 1 for sja1000, 15 for i82527 */
can_spinlock_t chip_lock;
/**
* struct msgobj_t - structure holding communication object state
- * @obj_base_addr:
+ * @obj_base_addr:
* @minor: associated device minor number
- * @object: object number in chip_t structure +1
+ * @object: object number in canchip_t structure +1
* @flags: message object flags
* @ret: field holding status of the last Tx operation
* @qends: pointer to message object corresponding ends structure
* @tx_timeout: can be used by chip driver to check for the transmission timeout
* @rx_msg: temporary storage to hold received messages before
* calling to canque_filter_msg2edges()
- * @hostchip: pointer to the &chip_t structure this object belongs to
+ * @hostchip: pointer to the &canchip_t structure this object belongs to
* @obj_used: counter of users (associated file structures for Linux
* userspace clients) of this object
* @obj_users: list of user structures of type &canuser_t.
+ * @obj_flags: message object specific flags. Masks values:
+ * %MSGOBJ_TX_REQUEST .. the message object requests TX activation
+ * %MSGOBJ_TX_LOCK .. some IRQ routine or callback on some CPU
+ * is running inside TX activation processing code
+ * @rx_preconfig_id: place to store RX message identifier for some chip types
+ * that reuse same object for TX
*/
struct msgobj_t {
- unsigned long obj_base_addr;
+ can_ioptr_t obj_base_addr;
unsigned int minor; /* associated device minor number */
- unsigned int object; /* object number in chip_t +1 for debug printk */
- unsigned long obj_flags;
+ unsigned int object; /* object number in canchip_t +1 for debug printk */
+ unsigned long obj_flags;
int ret;
struct canque_ends_t *qends;
struct canque_slot_t *tx_slot;
int tx_retry_cnt;
struct timer_list tx_timeout;
-
+
struct canmsg_t rx_msg;
- struct chip_t *hostchip;
+ struct canchip_t *hostchip;
+
+ unsigned long rx_preconfig_id;
atomic_t obj_used;
struct list_head obj_users;
* @request_io: reserve io or memory range for can board
* @release_io: free reserved io memory range
* @reset: hardware reset routine
- * @init_hw_data: called to initialize &candevice_t structure, mainly
+ * @init_hw_data: called to initialize &candevice_t structure, mainly
* @res_add, @nr_all_chips, @nr_82527_chips, @nr_sja1000_chips
* and @flags fields
- * @init_chip_data: called initialize each &chip_t structure, mainly
+ * @init_chip_data: called initialize each &canchip_t structure, mainly
* @chip_type, @chip_base_addr, @clock and chip specific registers.
- * It is responsible to setup &chip_t->@chipspecops functions
+ * It is responsible to setup &canchip_t->@chipspecops functions
* for non-standard chip types (type other than "i82527", "sja1000" or "sja1000p")
* @init_obj_data: called initialize each &msgobj_t structure,
* mainly @obj_base_addr field.
* @program_irq: program interrupt generation hardware of the board
- * if flag %PROGRAMMABLE_IRQ is present for specified device/board
+ * if flag %PROGRAMMABLE_IRQ is present for specified device/board
* @write_register: low level write register routine
* @read_register: low level read register routine
*/
int (*reset)(struct candevice_t *candev);
int (*init_hw_data)(struct candevice_t *candev);
int (*init_chip_data)(struct candevice_t *candev, int chipnr);
- int (*init_obj_data)(struct chip_t *chip, int objnr);
+ int (*init_obj_data)(struct canchip_t *chip, int objnr);
int (*program_irq)(struct candevice_t *candev);
- void (*write_register)(unsigned char data,unsigned long address);
- unsigned (*read_register)(unsigned long address);
+ void (*write_register)(unsigned data, can_ioptr_t address);
+ unsigned (*read_register)(can_ioptr_t address);
};
/**
* @remote_request: configures message object and asks for RTR message
* @check_tx_stat: checks state of transmission engine
* @wakeup_tx: wakeup TX processing
+ * @filtch_rq: optional routine for propagation of outgoing edges filters to HW
* @enable_configuration: enable chip configuration mode
* @disable_configuration: disable chip configuration mode
* @set_btregs: configures bitrate registers
+ * @attach_to_chip: attaches to the chip, setups registers and possibly state informations
+ * @release_chip: called before chip structure removal if %CHIP_ATTACHED is set
* @start_chip: starts chip message processing
* @stop_chip: stops chip message processing
* @irq_handler: interrupt service routine
+ * @irq_accept: optional fast irq accept routine responsible for blocking further interrupts
*/
struct chipspecops_t {
- int (*chip_config)(struct chip_t *chip);
- int (*baud_rate)(struct chip_t *chip, int rate, int clock, int sjw,
+ int (*chip_config)(struct canchip_t *chip);
+ int (*baud_rate)(struct canchip_t *chip, int rate, int clock, int sjw,
int sampl_pt, int flags);
- int (*standard_mask)(struct chip_t *chip, unsigned short code,
+ int (*standard_mask)(struct canchip_t *chip, unsigned short code,
unsigned short mask);
- int (*extended_mask)(struct chip_t *chip, unsigned long code,
+ int (*extended_mask)(struct canchip_t *chip, unsigned long code,
unsigned long mask);
- int (*message15_mask)(struct chip_t *chip, unsigned long code,
+ int (*message15_mask)(struct canchip_t *chip, unsigned long code,
unsigned long mask);
- int (*clear_objects)(struct chip_t *chip);
- int (*config_irqs)(struct chip_t *chip, short irqs);
- int (*pre_read_config)(struct chip_t *chip, struct msgobj_t *obj);
- int (*pre_write_config)(struct chip_t *chip, struct msgobj_t *obj,
+ int (*clear_objects)(struct canchip_t *chip);
+ int (*config_irqs)(struct canchip_t *chip, short irqs);
+ int (*pre_read_config)(struct canchip_t *chip, struct msgobj_t *obj);
+ int (*pre_write_config)(struct canchip_t *chip, struct msgobj_t *obj,
struct canmsg_t *msg);
- int (*send_msg)(struct chip_t *chip, struct msgobj_t *obj,
+ int (*send_msg)(struct canchip_t *chip, struct msgobj_t *obj,
struct canmsg_t *msg);
- int (*remote_request)(struct chip_t *chip, struct msgobj_t *obj);
- int (*check_tx_stat)(struct chip_t *chip);
- int (*wakeup_tx)(struct chip_t *chip, struct msgobj_t *obj);
- int (*enable_configuration)(struct chip_t *chip);
- int (*disable_configuration)(struct chip_t *chip);
- int (*set_btregs)(struct chip_t *chip, unsigned short btr0,
+ int (*remote_request)(struct canchip_t *chip, struct msgobj_t *obj);
+ int (*check_tx_stat)(struct canchip_t *chip);
+ int (*wakeup_tx)(struct canchip_t *chip, struct msgobj_t *obj);
+ int (*filtch_rq)(struct canchip_t *chip, struct msgobj_t *obj);
+ int (*enable_configuration)(struct canchip_t *chip);
+ int (*disable_configuration)(struct canchip_t *chip);
+ int (*set_btregs)(struct canchip_t *chip, unsigned short btr0,
unsigned short btr1);
- int (*start_chip)(struct chip_t *chip);
- int (*stop_chip)(struct chip_t *chip);
- can_irqreturn_t (*irq_handler)(int irq, void *dev_id, struct pt_regs *regs);
+ int (*attach_to_chip)(struct canchip_t *chip);
+ int (*release_chip)(struct canchip_t *chip);
+ int (*start_chip)(struct canchip_t *chip);
+ int (*stop_chip)(struct canchip_t *chip);
+ int (*irq_handler)(int irq, struct canchip_t *chip);
+ int (*irq_accept)(int irq, struct canchip_t *chip);
};
struct mem_addr {
extern int minor[MAX_TOT_CHIPS];
extern int extended;
extern int baudrate[MAX_TOT_CHIPS];
-extern char *hw[MAX_HW_CARDS];
extern int irq[MAX_IRQ];
+extern char *hw[MAX_HW_CARDS];
extern unsigned long io[MAX_HW_CARDS];
+extern long clockfreq[MAX_HW_CARDS];
extern int processlocal;
extern struct canhardware_t *hardware_p;
-extern struct chip_t *chips_p[MAX_TOT_CHIPS];
+extern struct canchip_t *chips_p[MAX_TOT_CHIPS];
extern struct msgobj_t *objects_p[MAX_TOT_MSGOBJS];
extern struct mem_addr *mem_head;
-/* Inline function to write to the hardware registers. The argument address is
- * relative to the memory map of the chip and not the absolute memory address.
+
+#if defined(CONFIG_OC_LINCAN_PORTIO_ONLY)
+extern inline void can_write_reg(const struct canchip_t *chip, unsigned char data, unsigned reg_offs)
+{
+ can_outb(data, chip->chip_base_addr+reg_offs);
+}
+extern inline unsigned can_read_reg(const struct canchip_t *chip, unsigned reg_offs)
+{
+ return can_inb(chip->chip_base_addr+reg_offs);
+}
+extern inline void canobj_write_reg(const struct canchip_t *chip, const struct msgobj_t *obj,
+ unsigned char data, unsigned reg_offs)
+{
+ can_outb(data, obj->obj_base_addr+reg_offs);
+}
+extern inline unsigned canobj_read_reg(const struct canchip_t *chip, const struct msgobj_t *obj,
+ unsigned reg_offs)
+{
+ return can_inb(obj->obj_base_addr+reg_offs);
+}
+
+#elif defined(CONFIG_OC_LINCAN_MEMIO_ONLY)
+extern inline void can_write_reg(const struct canchip_t *chip, unsigned char data, unsigned reg_offs)
+{
+ can_writeb(data, chip->chip_base_addr+reg_offs);
+}
+extern inline unsigned can_read_reg(const struct canchip_t *chip, unsigned reg_offs)
+{
+ return can_readb(chip->chip_base_addr+reg_offs);
+}
+extern inline void canobj_write_reg(const struct canchip_t *chip, const struct msgobj_t *obj,
+ unsigned char data, unsigned reg_offs)
+{
+ can_writeb(data, obj->obj_base_addr+reg_offs);
+}
+extern inline unsigned canobj_read_reg(const struct canchip_t *chip, const struct msgobj_t *obj,
+ unsigned reg_offs)
+{
+ return can_readb(obj->obj_base_addr+reg_offs);
+}
+
+#else /*CONFIG_OC_LINCAN_DYNAMICIO*/
+#ifndef CONFIG_OC_LINCAN_DYNAMICIO
+#define CONFIG_OC_LINCAN_DYNAMICIO
+#endif
+
+/* Inline function to write to the hardware registers. The argument reg_offs is
+ * relative to the memory map of the chip and not the absolute memory reg_offs.
*/
-extern inline void can_write_reg(const struct chip_t *chip, unsigned char data, unsigned address)
+extern inline void can_write_reg(const struct canchip_t *chip, unsigned char data, unsigned reg_offs)
{
- unsigned long address_to_write;
- address_to_write = chip->chip_base_addr+address;
+ can_ioptr_t address_to_write;
+ address_to_write = chip->chip_base_addr+reg_offs;
chip->write_register(data, address_to_write);
}
-extern inline unsigned can_read_reg(const struct chip_t *chip, unsigned address)
+extern inline unsigned can_read_reg(const struct canchip_t *chip, unsigned reg_offs)
{
- unsigned long address_to_read;
- address_to_read = chip->chip_base_addr+address;
+ can_ioptr_t address_to_read;
+ address_to_read = chip->chip_base_addr+reg_offs;
return chip->read_register(address_to_read);
}
-extern inline void canobj_write_reg(const struct chip_t *chip, const struct msgobj_t *obj,
- unsigned char data, unsigned address)
+extern inline void canobj_write_reg(const struct canchip_t *chip, const struct msgobj_t *obj,
+ unsigned char data, unsigned reg_offs)
{
- unsigned long address_to_write;
- address_to_write = obj->obj_base_addr+address;
+ can_ioptr_t address_to_write;
+ address_to_write = obj->obj_base_addr+reg_offs;
chip->write_register(data, address_to_write);
}
-extern inline unsigned canobj_read_reg(const struct chip_t *chip, const struct msgobj_t *obj,
- unsigned address)
+extern inline unsigned canobj_read_reg(const struct canchip_t *chip, const struct msgobj_t *obj,
+ unsigned reg_offs)
{
- unsigned long address_to_read;
- address_to_read = obj->obj_base_addr+address;
+ can_ioptr_t address_to_read;
+ address_to_read = obj->obj_base_addr+reg_offs;
return chip->read_register(address_to_read);
}
-int can_base_addr_fixup(struct candevice_t *candev, unsigned long new_base);
+#endif /*CONFIG_OC_LINCAN_DYNAMICIO*/
+
+int can_base_addr_fixup(struct candevice_t *candev, can_ioptr_t new_base);
int can_request_io_region(unsigned long start, unsigned long n, const char *name);
void can_release_io_region(unsigned long start, unsigned long n);
int can_request_mem_region(unsigned long start, unsigned long n, const char *name);
const struct boardtype_t* boardtype_find(const char *str);
+int can_check_dev_taken(void *anydev);
+
+#if defined(can_gettimeofday) && defined(CAN_MSG_VERSION_2) && 1
+static inline
+void can_filltimestamp(canmsg_tstamp_t *ptimestamp)
+{
+ can_gettimeofday(ptimestamp);
+}
+#else /* No timestamp support, set field to zero */
+static inline
+void can_filltimestamp(canmsg_tstamp_t *ptimestamp)
+{
+ #ifdef CAN_MSG_VERSION_2
+ ptimestamp->tv_sec = 0;
+ ptimestamp->tv_usec = 0;
+ #else /* CAN_MSG_VERSION_2 */
+ *ptimestamp = 0;
+ #endif /* CAN_MSG_VERSION_2 */
+
+}
+#endif /* End of timestamp source selection */
+
#ifdef CAN_WITH_RTL
extern int can_rtl_priority;
#endif /*CAN_WITH_RTL*/
+
+extern struct candevice_t* register_usbdev(const char *hwname,void *devdata,void (*chipdataregfnc)(struct canchip_t *chip,void *data));
+extern void cleanup_usbdev(struct candevice_t *dev);
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