7 /* enough bytes to match alignment of following func pointer */
15 void (*putc)(const char c);
16 void (*puts)(const char *s);
17 #if CONFIG_POST & CONFIG_SYS_POST_UART
20 struct serial_device *next;
23 void default_serial_puts(const char *s);
25 extern struct serial_device serial_smc_device;
26 extern struct serial_device serial_scc_device;
27 extern struct serial_device *default_serial_console(void);
29 #if defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) || \
30 defined(CONFIG_MPC86xx) || \
31 defined(CONFIG_TEGRA) || defined(CONFIG_SYS_COREBOOT) || \
32 defined(CONFIG_MICROBLAZE)
33 extern struct serial_device serial0_device;
34 extern struct serial_device serial1_device;
37 extern struct serial_device eserial1_device;
38 extern struct serial_device eserial2_device;
39 extern struct serial_device eserial3_device;
40 extern struct serial_device eserial4_device;
41 extern struct serial_device eserial5_device;
42 extern struct serial_device eserial6_device;
44 extern void serial_register(struct serial_device *);
45 extern void serial_initialize(void);
46 extern void serial_stdio_init(void);
47 extern int serial_assign(const char *name);
48 extern void serial_reinit_all(void);
53 extern int usbtty_getc(void);
54 extern void usbtty_putc(const char c);
55 extern void usbtty_puts(const char *str);
56 extern int usbtty_tstc(void);
61 #define usbtty_getc() 0
62 #define usbtty_putc(a)
63 #define usbtty_puts(a)
64 #define usbtty_tstc() 0
66 #endif /* CONFIG_USB_TTY */
76 #define SERIAL_PAR_SHIFT 0
77 #define SERIAL_PAR_MASK (0x03 << SERIAL_PAR_SHIFT)
78 #define SERIAL_SET_PARITY(parity) \
79 ((parity << SERIAL_PAR_SHIFT) & SERIAL_PAR_MASK)
80 #define SERIAL_GET_PARITY(config) \
81 ((config & SERIAL_PAR_MASK) >> SERIAL_PAR_SHIFT)
90 #define SERIAL_BITS_SHIFT 2
91 #define SERIAL_BITS_MASK (0x3 << SERIAL_BITS_SHIFT)
92 #define SERIAL_SET_BITS(bits) \
93 ((bits << SERIAL_BITS_SHIFT) & SERIAL_BITS_MASK)
94 #define SERIAL_GET_BITS(config) \
95 ((config & SERIAL_BITS_MASK) >> SERIAL_BITS_SHIFT)
98 SERIAL_HALF_STOP, /* 0.5 stop bit */
99 SERIAL_ONE_STOP, /* 1 stop bit */
100 SERIAL_ONE_HALF_STOP, /* 1.5 stop bit */
101 SERIAL_TWO_STOP /* 2 stop bit */
104 #define SERIAL_STOP_SHIFT 4
105 #define SERIAL_STOP_MASK (0x3 << SERIAL_STOP_SHIFT)
106 #define SERIAL_SET_STOP(stop) \
107 ((stop << SERIAL_STOP_SHIFT) & SERIAL_STOP_MASK)
108 #define SERIAL_GET_STOP(config) \
109 ((config & SERIAL_STOP_MASK) >> SERIAL_STOP_SHIFT)
111 #define SERIAL_CONFIG(par, bits, stop) \
112 (par << SERIAL_PAR_SHIFT | \
113 bits << SERIAL_BITS_SHIFT | \
114 stop << SERIAL_STOP_SHIFT)
116 #define SERIAL_DEFAULT_CONFIG \
117 (SERIAL_PAR_NONE << SERIAL_PAR_SHIFT | \
118 SERIAL_8_BITS << SERIAL_BITS_SHIFT | \
119 SERIAL_ONE_STOP << SERIAL_STOP_SHIFT)
122 * struct struct dm_serial_ops - Driver model serial operations
124 * The uclass interface is implemented by all serial devices which use
127 struct dm_serial_ops {
129 * setbrg() - Set up the baud rate generator
131 * Adjust baud rate divisors to set up a new baud rate for this
132 * device. Not all devices will support all rates. If the rate
133 * cannot be supported, the driver is free to select the nearest
134 * available rate. or return -EINVAL if this is not possible.
136 * @dev: Device pointer
137 * @baudrate: New baud rate to use
138 * @return 0 if OK, -ve on error
140 int (*setbrg)(struct udevice *dev, int baudrate);
142 * getc() - Read a character and return it
144 * If no character is available, this should return -EAGAIN without
147 * @dev: Device pointer
148 * @return character (0..255), -ve on error
150 int (*getc)(struct udevice *dev);
152 * putc() - Write a character
154 * @dev: Device pointer
155 * @ch: character to write
156 * @return 0 if OK, -ve on error
158 int (*putc)(struct udevice *dev, const char ch);
160 * pending() - Check if input/output characters are waiting
162 * This can be used to return an indication of the number of waiting
163 * characters if the driver knows this (e.g. by looking at the FIFO
164 * level). It is acceptable to return 1 if an indeterminant number
165 * of characters is waiting.
167 * This method is optional.
169 * @dev: Device pointer
170 * @input: true to check input characters, false for output
171 * @return number of waiting characters, 0 for none, -ve on error
173 int (*pending)(struct udevice *dev, bool input);
175 * clear() - Clear the serial FIFOs/holding registers
177 * This method is optional.
179 * This quickly clears any input/output characters from the UART.
180 * If this is not possible, but characters still exist, then it
181 * is acceptable to return -EAGAIN (try again) or -EINVAL (not
184 * @dev: Device pointer
185 * @return 0 if OK, -ve on error
187 int (*clear)(struct udevice *dev);
188 #if CONFIG_POST & CONFIG_SYS_POST_UART
190 * loop() - Control serial device loopback mode
192 * @dev: Device pointer
193 * @on: 1 to turn loopback on, 0 to turn if off
195 int (*loop)(struct udevice *dev, int on);
199 * getconfig() - Get the uart configuration
200 * (parity, 5/6/7/8 bits word length, stop bits)
202 * Get a current config for this device.
204 * @dev: Device pointer
205 * @parity: parity to use
206 * @bits: bits number to use
207 * @stop: stop bits number to use
208 * @return 0 if OK, -ve on error
210 int (*getconfig)(struct udevice *dev, uint *serial_config);
212 * setconfig() - Set up the uart configuration
213 * (parity, 5/6/7/8 bits word length, stop bits)
215 * Set up a new config for this device.
217 * @dev: Device pointer
218 * @serial_config: number of bits, parity and number of stopbits to use
219 * @return 0 if OK, -ve on error
221 int (*setconfig)(struct udevice *dev, uint serial_config);
225 * struct serial_dev_priv - information about a device used by the uclass
227 * @sdev: stdio device attached to this uart
229 * @buf: Pointer to the RX buffer
230 * @rd_ptr: Read pointer in the RX buffer
231 * @wr_ptr: Write pointer in the RX buffer
233 struct serial_dev_priv {
234 struct stdio_dev *sdev;
241 /* Access the serial operations for a device */
242 #define serial_get_ops(dev) ((struct dm_serial_ops *)(dev)->driver->ops)
244 void atmel_serial_initialize(void);
245 void mcf_serial_initialize(void);
246 void mpc85xx_serial_initialize(void);
247 void mxc_serial_initialize(void);
248 void ns16550_serial_initialize(void);
249 void pl01x_serial_initialize(void);
250 void pxa_serial_initialize(void);
251 void sh_serial_initialize(void);