|
@@ -0,0 +1,146 @@
|
|
|
+/*
|
|
|
+ * serial.h: Arch-dep definitions for the Etrax100 serial driver.
|
|
|
+ *
|
|
|
+ * Copyright (C) 1998-2007 Axis Communications AB
|
|
|
+ */
|
|
|
+
|
|
|
+#ifndef _ETRAX_SERIAL_H
|
|
|
+#define _ETRAX_SERIAL_H
|
|
|
+
|
|
|
+#include <linux/circ_buf.h>
|
|
|
+#include <asm/termios.h>
|
|
|
+#include <asm/dma.h>
|
|
|
+#include <asm/arch/io_interface_mux.h>
|
|
|
+
|
|
|
+/* Software state per channel */
|
|
|
+
|
|
|
+#ifdef __KERNEL__
|
|
|
+/*
|
|
|
+ * This is our internal structure for each serial port's state.
|
|
|
+ *
|
|
|
+ * Many fields are paralleled by the structure used by the serial_struct
|
|
|
+ * structure.
|
|
|
+ *
|
|
|
+ * For definitions of the flags field, see tty.h
|
|
|
+ */
|
|
|
+
|
|
|
+#define SERIAL_RECV_DESCRIPTORS 8
|
|
|
+
|
|
|
+struct etrax_recv_buffer {
|
|
|
+ struct etrax_recv_buffer *next;
|
|
|
+ unsigned short length;
|
|
|
+ unsigned char error;
|
|
|
+ unsigned char pad;
|
|
|
+
|
|
|
+ unsigned char buffer[0];
|
|
|
+};
|
|
|
+
|
|
|
+struct e100_serial {
|
|
|
+ int baud;
|
|
|
+ volatile u8 *port; /* R_SERIALx_CTRL */
|
|
|
+ u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */
|
|
|
+
|
|
|
+ /* Output registers */
|
|
|
+ volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
|
|
|
+ volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */
|
|
|
+ volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */
|
|
|
+ const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */
|
|
|
+
|
|
|
+ /* Input registers */
|
|
|
+ volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
|
|
|
+ volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */
|
|
|
+ volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */
|
|
|
+ volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */
|
|
|
+
|
|
|
+ int flags; /* defined in tty.h */
|
|
|
+
|
|
|
+ u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */
|
|
|
+ u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */
|
|
|
+ u8 iseteop; /* bit number for R_SET_EOP for the input dma */
|
|
|
+ int enabled; /* Set to 1 if the port is enabled in HW config */
|
|
|
+
|
|
|
+ u8 dma_out_enabled; /* Set to 1 if DMA should be used */
|
|
|
+ u8 dma_in_enabled; /* Set to 1 if DMA should be used */
|
|
|
+
|
|
|
+ /* end of fields defined in rs_table[] in .c-file */
|
|
|
+ int dma_owner;
|
|
|
+ unsigned int dma_in_nbr;
|
|
|
+ unsigned int dma_out_nbr;
|
|
|
+ unsigned int dma_in_irq_nbr;
|
|
|
+ unsigned int dma_out_irq_nbr;
|
|
|
+ unsigned long dma_in_irq_flags;
|
|
|
+ unsigned long dma_out_irq_flags;
|
|
|
+ char *dma_in_irq_description;
|
|
|
+ char *dma_out_irq_description;
|
|
|
+
|
|
|
+ enum cris_io_interface io_if;
|
|
|
+ char *io_if_description;
|
|
|
+
|
|
|
+ u8 uses_dma_in; /* Set to 1 if DMA is used */
|
|
|
+ u8 uses_dma_out; /* Set to 1 if DMA is used */
|
|
|
+ u8 forced_eop; /* a fifo eop has been forced */
|
|
|
+ int baud_base; /* For special baudrates */
|
|
|
+ int custom_divisor; /* For special baudrates */
|
|
|
+ struct etrax_dma_descr tr_descr;
|
|
|
+ struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS];
|
|
|
+ int cur_rec_descr;
|
|
|
+
|
|
|
+ volatile int tr_running; /* 1 if output is running */
|
|
|
+
|
|
|
+ struct tty_struct *tty;
|
|
|
+ int read_status_mask;
|
|
|
+ int ignore_status_mask;
|
|
|
+ int x_char; /* xon/xoff character */
|
|
|
+ int close_delay;
|
|
|
+ unsigned short closing_wait;
|
|
|
+ unsigned short closing_wait2;
|
|
|
+ unsigned long event;
|
|
|
+ unsigned long last_active;
|
|
|
+ int line;
|
|
|
+ int type; /* PORT_ETRAX */
|
|
|
+ int count; /* # of fd on device */
|
|
|
+ int blocked_open; /* # of blocked opens */
|
|
|
+ struct circ_buf xmit;
|
|
|
+ struct etrax_recv_buffer *first_recv_buffer;
|
|
|
+ struct etrax_recv_buffer *last_recv_buffer;
|
|
|
+ unsigned int recv_cnt;
|
|
|
+ unsigned int max_recv_cnt;
|
|
|
+
|
|
|
+ struct work_struct work;
|
|
|
+ struct async_icount icount; /* error-statistics etc.*/
|
|
|
+ struct ktermios normal_termios;
|
|
|
+ struct ktermios callout_termios;
|
|
|
+ wait_queue_head_t open_wait;
|
|
|
+ wait_queue_head_t close_wait;
|
|
|
+
|
|
|
+ unsigned long char_time_usec; /* The time for 1 char, in usecs */
|
|
|
+ unsigned long flush_time_usec; /* How often we should flush */
|
|
|
+ unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */
|
|
|
+ unsigned long last_tx_active; /* Last tx time in jiffies */
|
|
|
+ unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */
|
|
|
+ unsigned long last_rx_active; /* Last rx time in jiffies */
|
|
|
+
|
|
|
+ int break_detected_cnt;
|
|
|
+ int errorcode;
|
|
|
+
|
|
|
+#ifdef CONFIG_ETRAX_RS485
|
|
|
+ struct rs485_control rs485; /* RS-485 support */
|
|
|
+#endif
|
|
|
+};
|
|
|
+
|
|
|
+/* this PORT is not in the standard serial.h. it's not actually used for
|
|
|
+ * anything since we only have one type of async serial-port anyway in this
|
|
|
+ * system.
|
|
|
+ */
|
|
|
+
|
|
|
+#define PORT_ETRAX 1
|
|
|
+
|
|
|
+/*
|
|
|
+ * Events are used to schedule things to happen at timer-interrupt
|
|
|
+ * time, instead of at rs interrupt time.
|
|
|
+ */
|
|
|
+#define RS_EVENT_WRITE_WAKEUP 0
|
|
|
+
|
|
|
+#endif /* __KERNEL__ */
|
|
|
+
|
|
|
+#endif /* !_ETRAX_SERIAL_H */
|