drivers/tty/synclink.c

180 struct mgsl_struct {  struct
200 	struct mgsl_struct	*next_device;	/* device list link */  argument
202 	spinlock_t irq_spinlock;		/* spinlock for synchronizing with ISR */
203 	struct work_struct task;		/* task structure for scheduling bh */
205 	u32 EventMask;			/* event trigger mask */
206 	u32 RecordedEvents;		/* pending events */
208 	u32 max_frame_size;		/* as set by device config */
210 	u32 pending_bh;
212 	bool bh_running;		/* Protection from multiple */
213 	int isr_overflow;
214 	bool bh_requested;
216 	int dcd_chkcount;		/* check counts to prevent */
217 	int cts_chkcount;		/* too many IRQs if a signal */
218 	int dsr_chkcount;		/* is floating */
219 	int ri_chkcount;
221 	char *buffer_list;		/* virtual address of Rx & Tx buffer lists */
222 	u32 buffer_list_phys;
223 	dma_addr_t buffer_list_dma_addr;
225 	unsigned int rx_buffer_count;	/* count of total allocated Rx buffers */
226 	DMABUFFERENTRY *rx_buffer_list;	/* list of receive buffer entries */
227 	unsigned int current_rx_buffer;
229 	int num_tx_dma_buffers;		/* number of tx dma frames required */
230  	int tx_dma_buffers_used;
231 	unsigned int tx_buffer_count;	/* count of total allocated Tx buffers */
232 	DMABUFFERENTRY *tx_buffer_list;	/* list of transmit buffer entries */
233 	int start_tx_dma_buffer;	/* tx dma buffer to start tx dma operation */
234 	int current_tx_buffer;          /* next tx dma buffer to be loaded */
236 	unsigned char *intermediate_rxbuffer;
238 	int num_tx_holding_buffers;	/* number of tx holding buffer allocated */
239 	int get_tx_holding_index;  	/* next tx holding buffer for adapter to load */
240 	int put_tx_holding_index;  	/* next tx holding buffer to store user request */
241 	int tx_holding_count;		/* number of tx holding buffers waiting */
242 	struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS];
244 	bool rx_enabled;
245 	bool rx_overflow;
246 	bool rx_rcc_underrun;
248 	bool tx_enabled;
249 	bool tx_active;
250 	u32 idle_mode;
252 	u16 cmr_value;
253 	u16 tcsr_value;
255 	char device_name[25];		/* device instance name */
257 	unsigned int bus_type;	/* expansion bus type (ISA,EISA,PCI) */
258 	unsigned char bus;		/* expansion bus number (zero based) */
259 	unsigned char function;		/* PCI device number */
261 	unsigned int io_base;		/* base I/O address of adapter */
262 	unsigned int io_addr_size;	/* size of the I/O address range */
263 	bool io_addr_requested;		/* true if I/O address requested */
265 	unsigned int irq_level;		/* interrupt level */
266 	unsigned long irq_flags;
267 	bool irq_requested;		/* true if IRQ requested */
269 	unsigned int dma_level;		/* DMA channel */
270 	bool dma_requested;		/* true if dma channel requested */
272 	u16 mbre_bit;
273 	u16 loopback_bits;
274 	u16 usc_idle_mode;
276 	MGSL_PARAMS params;		/* communications parameters */
278 	unsigned char serial_signals;	/* current serial signal states */
280 	bool irq_occurred;		/* for diagnostics use */
281 	unsigned int init_error;	/* Initialization startup error 		(DIAGS)	*/
282 	int	fDiagnosticsmode;	/* Driver in Diagnostic mode?			(DIAGS)	*/
284 	u32 last_mem_alloc;
285 	unsigned char* memory_base;	/* shared memory address (PCI only) */
286 	u32 phys_memory_base;
287 	bool shared_mem_requested;
289 	unsigned char* lcr_base;	/* local config registers (PCI only) */
290 	u32 phys_lcr_base;
291 	u32 lcr_offset;
292 	bool lcr_mem_requested;
294 	u32 misc_ctrl_value;
295 	char flag_buf[MAX_ASYNC_BUFFER_SIZE];
296 	char char_buf[MAX_ASYNC_BUFFER_SIZE];
297 	bool drop_rts_on_tx_done;
299 	bool loopmode_insert_requested;
300 	bool loopmode_send_done_requested;
302 	struct	_input_signal_events	input_signal_events;
305 	int netcount;
306 	spinlock_t netlock;
309 	struct net_device *netdev;