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#ifndef __SERIAL_H__
#define __SERIAL_H__
#include <post.h>
struct serial_device {
/* enough bytes to match alignment of following func pointer */
char name[16];
int (*start)(void);
int (*stop)(void);
void (*setbrg)(void);
int (*getc)(void);
int (*tstc)(void);
void (*putc)(const char c);
void (*puts)(const char *s);
#if CONFIG_POST & CONFIG_SYS_POST_UART
void (*loop)(int);
#endif
struct serial_device *next;
};
void default_serial_puts(const char *s);
extern struct serial_device serial_smc_device;
extern struct serial_device serial_scc_device;
extern struct serial_device *default_serial_console(void);
#if defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) || \
defined(CONFIG_MPC86xx) || \
defined(CONFIG_TEGRA) || defined(CONFIG_SYS_COREBOOT) || \
defined(CONFIG_MICROBLAZE)
extern struct serial_device serial0_device;
extern struct serial_device serial1_device;
#endif
extern struct serial_device eserial1_device;
extern struct serial_device eserial2_device;
extern struct serial_device eserial3_device;
extern struct serial_device eserial4_device;
extern struct serial_device eserial5_device;
extern struct serial_device eserial6_device;
extern void serial_register(struct serial_device *);
extern void serial_initialize(void);
extern void serial_stdio_init(void);
extern int serial_assign(const char *name);
extern void serial_reinit_all(void);
/* For usbtty */
#ifdef CONFIG_USB_TTY
extern int usbtty_getc(void);
extern void usbtty_putc(const char c);
extern void usbtty_puts(const char *str);
extern int usbtty_tstc(void);
#else
/* stubs */
#define usbtty_getc() 0
#define usbtty_putc(a)
#define usbtty_puts(a)
#define usbtty_tstc() 0
#endif /* CONFIG_USB_TTY */
struct udevice;
enum serial_par {
SERIAL_PAR_NONE,
SERIAL_PAR_ODD,
SERIAL_PAR_EVEN
};
#define SERIAL_PAR_SHIFT 0
#define SERIAL_PAR_MASK (0x03 << SERIAL_PAR_SHIFT)
#define SERIAL_GET_PARITY(config) \
((config & SERIAL_PAR_MASK) >> SERIAL_PAR_SHIFT)
enum serial_bits {
SERIAL_5_BITS,
SERIAL_6_BITS,
SERIAL_7_BITS,
SERIAL_8_BITS
};
#define SERIAL_BITS_SHIFT 2
#define SERIAL_BITS_MASK (0x3 << SERIAL_BITS_SHIFT)
#define SERIAL_GET_BITS(config) \
((config & SERIAL_BITS_MASK) >> SERIAL_BITS_SHIFT)
enum serial_stop {
SERIAL_HALF_STOP, /* 0.5 stop bit */
SERIAL_ONE_STOP, /* 1 stop bit */
SERIAL_ONE_HALF_STOP, /* 1.5 stop bit */
SERIAL_TWO_STOP /* 2 stop bit */
};
#define SERIAL_STOP_SHIFT 4
#define SERIAL_STOP_MASK (0x3 << SERIAL_STOP_SHIFT)
#define SERIAL_GET_STOP(config) \
((config & SERIAL_STOP_MASK) >> SERIAL_STOP_SHIFT)
#define SERIAL_CONFIG(par, bits, stop) \
(par << SERIAL_PAR_SHIFT | \
bits << SERIAL_BITS_SHIFT | \
stop << SERIAL_STOP_SHIFT)
#define SERIAL_DEFAULT_CONFIG SERIAL_PAR_NONE << SERIAL_PAR_SHIFT | \
SERIAL_8_BITS << SERIAL_BITS_SHIFT | \
SERIAL_ONE_STOP << SERIAL_STOP_SHIFT
/**
* struct struct dm_serial_ops - Driver model serial operations
*
* The uclass interface is implemented by all serial devices which use
* driver model.
*/
struct dm_serial_ops {
/**
* setbrg() - Set up the baud rate generator
*
* Adjust baud rate divisors to set up a new baud rate for this
* device. Not all devices will support all rates. If the rate
* cannot be supported, the driver is free to select the nearest
* available rate. or return -EINVAL if this is not possible.
*
* @dev: Device pointer
* @baudrate: New baud rate to use
* @return 0 if OK, -ve on error
*/
int (*setbrg)(struct udevice *dev, int baudrate);
/**
* getc() - Read a character and return it
*
* If no character is available, this should return -EAGAIN without
* waiting.
*
* @dev: Device pointer
* @return character (0..255), -ve on error
*/
int (*getc)(struct udevice *dev);
/**
* putc() - Write a character
*
* @dev: Device pointer
* @ch: character to write
* @return 0 if OK, -ve on error
*/
int (*putc)(struct udevice *dev, const char ch);
/**
* pending() - Check if input/output characters are waiting
*
* This can be used to return an indication of the number of waiting
* characters if the driver knows this (e.g. by looking at the FIFO
* level). It is acceptable to return 1 if an indeterminant number
* of characters is waiting.
*
* This method is optional.
*
* @dev: Device pointer
* @input: true to check input characters, false for output
* @return number of waiting characters, 0 for none, -ve on error
*/
int (*pending)(struct udevice *dev, bool input);
/**
* clear() - Clear the serial FIFOs/holding registers
*
* This method is optional.
*
* This quickly clears any input/output characters from the UART.
* If this is not possible, but characters still exist, then it
* is acceptable to return -EAGAIN (try again) or -EINVAL (not
* supported).
*
* @dev: Device pointer
* @return 0 if OK, -ve on error
*/
int (*clear)(struct udevice *dev);
#if CONFIG_POST & CONFIG_SYS_POST_UART
/**
* loop() - Control serial device loopback mode
*
* @dev: Device pointer
* @on: 1 to turn loopback on, 0 to turn if off
*/
int (*loop)(struct udevice *dev, int on);
#endif
/**
* setconfig() - Set up the uart configuration
* (parity, 5/6/7/8 bits word length, stop bits)
*
* Set up a new config for this device.
*
* @dev: Device pointer
* @serial_config: number of bits, parity and number of stopbits to use
* @return 0 if OK, -ve on error
*/
int (*setconfig)(struct udevice *dev, uint serial_config);
};
/**
* struct serial_dev_priv - information about a device used by the uclass
*
* @sdev: stdio device attached to this uart
*
* @buf: Pointer to the RX buffer
* @rd_ptr: Read pointer in the RX buffer
* @wr_ptr: Write pointer in the RX buffer
*/
struct serial_dev_priv {
struct stdio_dev *sdev;
char *buf;
int rd_ptr;
int wr_ptr;
};
/* Access the serial operations for a device */
#define serial_get_ops(dev) ((struct dm_serial_ops *)(dev)->driver->ops)
void atmel_serial_initialize(void);
void mcf_serial_initialize(void);
void mpc85xx_serial_initialize(void);
void mpc8xx_serial_initialize(void);
void mxc_serial_initialize(void);
void ns16550_serial_initialize(void);
void pl01x_serial_initialize(void);
void pxa_serial_initialize(void);
void sh_serial_initialize(void);
#endif
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