tty/serial/atmel_serial.c

110 struct atmel_uart_port {  struct
111 	struct uart_port	uart;		/* uart */
112 	struct clk		*clk;		/* uart clock */
113 	struct clk		*gclk;		/* uart generic clock */
114 	int			may_wakeup;	/* cached value of device_may_wakeup for times we need to disable it */
115 	u32			backup_imr;	/* IMR saved during suspend */
116 	int			break_active;	/* break being received */
118 	bool			use_dma_rx;	/* enable DMA receiver */
119 	bool			use_pdc_rx;	/* enable PDC receiver */
120 	short			pdc_rx_idx;	/* current PDC RX buffer */
121 	struct atmel_dma_buffer	pdc_rx[2];	/* PDC receier */
123 	bool			use_dma_tx;     /* enable DMA transmitter */
124 	bool			use_pdc_tx;	/* enable PDC transmitter */
125 	struct atmel_dma_buffer	pdc_tx;		/* PDC transmitter */
127 	spinlock_t			lock_tx;	/* port lock */
128 	spinlock_t			lock_rx;	/* port lock */
129 	struct dma_chan			*chan_tx;
130 	struct dma_chan			*chan_rx;
131 	struct dma_async_tx_descriptor	*desc_tx;
132 	struct dma_async_tx_descriptor	*desc_rx;
133 	dma_cookie_t			cookie_tx;
134 	dma_cookie_t			cookie_rx;
135 	struct scatterlist		sg_tx;
136 	struct scatterlist		sg_rx;
137 	struct tasklet_struct	tasklet_rx;
138 	struct tasklet_struct	tasklet_tx;
139 	atomic_t		tasklet_shutdown;
140 	unsigned int		irq_status_prev;
141 	unsigned int		tx_len;
143 	struct circ_buf		rx_ring;
145 	struct mctrl_gpios	*gpios;
146 	u32			backup_mode;	/* MR saved during iso7816 operations */
147 	u32			backup_brgr;	/* BRGR saved during iso7816 operations */
148 	unsigned int		tx_done_mask;
149 	u32			fifo_size;
150 	u32			rts_high;
151 	u32			rts_low;
152 	bool			ms_irq_enabled;
153 	u32			rtor;	/* address of receiver timeout register if it exists */
154 	bool			is_usart;
155 	bool			has_frac_baudrate;
156 	bool			has_hw_timer;
157 	struct timer_list	uart_timer;
159 	bool			tx_stopped;
160 	bool			suspended;
161 	unsigned int		pending;
162 	unsigned int		pending_status;
163 	spinlock_t		lock_suspended;
165 	bool			hd_start_rx;	/* can start RX during half-duplex operation */
190 static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];  argument