1 #ifndef __SERIAL_H__ 2 #define __SERIAL_H__ 3 4 #include <post.h> 5 6 struct serial_device { 7 /* enough bytes to match alignment of following func pointer */ 8 char name[16]; 9 10 int (*start)(void); 11 int (*stop)(void); 12 void (*setbrg)(void); 13 int (*getc)(void); 14 int (*tstc)(void); 15 void (*putc)(const char c); 16 void (*puts)(const char *s); 17 #if CONFIG_POST & CONFIG_SYS_POST_UART 18 void (*loop)(int); 19 #endif 20 struct serial_device *next; 21 }; 22 23 void default_serial_puts(const char *s); 24 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); 28 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; 35 #endif 36 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; 43 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); 49 50 /* For usbtty */ 51 #ifdef CONFIG_USB_TTY 52 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); 57 58 #else 59 60 /* stubs */ 61 #define usbtty_getc() 0 62 #define usbtty_putc(a) 63 #define usbtty_puts(a) 64 #define usbtty_tstc() 0 65 66 #endif /* CONFIG_USB_TTY */ 67 68 struct udevice; 69 70 enum serial_par { 71 SERIAL_PAR_NONE, 72 SERIAL_PAR_ODD, 73 SERIAL_PAR_EVEN 74 }; 75 76 #define SERIAL_PAR_SHIFT 0 77 #define SERIAL_PAR_MASK (0x03 << SERIAL_PAR_SHIFT) 78 #define SERIAL_GET_PARITY(config) \ 79 ((config & SERIAL_PAR_MASK) >> SERIAL_PAR_SHIFT) 80 81 enum serial_bits { 82 SERIAL_5_BITS, 83 SERIAL_6_BITS, 84 SERIAL_7_BITS, 85 SERIAL_8_BITS 86 }; 87 88 #define SERIAL_BITS_SHIFT 2 89 #define SERIAL_BITS_MASK (0x3 << SERIAL_BITS_SHIFT) 90 #define SERIAL_GET_BITS(config) \ 91 ((config & SERIAL_BITS_MASK) >> SERIAL_BITS_SHIFT) 92 93 enum serial_stop { 94 SERIAL_HALF_STOP, /* 0.5 stop bit */ 95 SERIAL_ONE_STOP, /* 1 stop bit */ 96 SERIAL_ONE_HALF_STOP, /* 1.5 stop bit */ 97 SERIAL_TWO_STOP /* 2 stop bit */ 98 }; 99 100 #define SERIAL_STOP_SHIFT 4 101 #define SERIAL_STOP_MASK (0x3 << SERIAL_STOP_SHIFT) 102 #define SERIAL_GET_STOP(config) \ 103 ((config & SERIAL_STOP_MASK) >> SERIAL_STOP_SHIFT) 104 105 #define SERIAL_DEFAULT_CONFIG SERIAL_PAR_NONE << SERIAL_PAR_SHIFT | \ 106 SERIAL_8_BITS << SERIAL_BITS_SHIFT | \ 107 SERIAL_ONE_STOP << SERIAL_STOP_SHIFT 108 109 /** 110 * struct struct dm_serial_ops - Driver model serial operations 111 * 112 * The uclass interface is implemented by all serial devices which use 113 * driver model. 114 */ 115 struct dm_serial_ops { 116 /** 117 * setbrg() - Set up the baud rate generator 118 * 119 * Adjust baud rate divisors to set up a new baud rate for this 120 * device. Not all devices will support all rates. If the rate 121 * cannot be supported, the driver is free to select the nearest 122 * available rate. or return -EINVAL if this is not possible. 123 * 124 * @dev: Device pointer 125 * @baudrate: New baud rate to use 126 * @return 0 if OK, -ve on error 127 */ 128 int (*setbrg)(struct udevice *dev, int baudrate); 129 /** 130 * getc() - Read a character and return it 131 * 132 * If no character is available, this should return -EAGAIN without 133 * waiting. 134 * 135 * @dev: Device pointer 136 * @return character (0..255), -ve on error 137 */ 138 int (*getc)(struct udevice *dev); 139 /** 140 * putc() - Write a character 141 * 142 * @dev: Device pointer 143 * @ch: character to write 144 * @return 0 if OK, -ve on error 145 */ 146 int (*putc)(struct udevice *dev, const char ch); 147 /** 148 * pending() - Check if input/output characters are waiting 149 * 150 * This can be used to return an indication of the number of waiting 151 * characters if the driver knows this (e.g. by looking at the FIFO 152 * level). It is acceptable to return 1 if an indeterminant number 153 * of characters is waiting. 154 * 155 * This method is optional. 156 * 157 * @dev: Device pointer 158 * @input: true to check input characters, false for output 159 * @return number of waiting characters, 0 for none, -ve on error 160 */ 161 int (*pending)(struct udevice *dev, bool input); 162 /** 163 * clear() - Clear the serial FIFOs/holding registers 164 * 165 * This method is optional. 166 * 167 * This quickly clears any input/output characters from the UART. 168 * If this is not possible, but characters still exist, then it 169 * is acceptable to return -EAGAIN (try again) or -EINVAL (not 170 * supported). 171 * 172 * @dev: Device pointer 173 * @return 0 if OK, -ve on error 174 */ 175 int (*clear)(struct udevice *dev); 176 #if CONFIG_POST & CONFIG_SYS_POST_UART 177 /** 178 * loop() - Control serial device loopback mode 179 * 180 * @dev: Device pointer 181 * @on: 1 to turn loopback on, 0 to turn if off 182 */ 183 int (*loop)(struct udevice *dev, int on); 184 #endif 185 186 /** 187 * setconfig() - Set up the uart configuration 188 * (parity, 5/6/7/8 bits word length, stop bits) 189 * 190 * Set up a new config for this device. 191 * 192 * @dev: Device pointer 193 * @parity: parity to use 194 * @bits: bits number to use 195 * @stop: stop bits number to use 196 * @return 0 if OK, -ve on error 197 */ 198 int (*setconfig)(struct udevice *dev, uint serial_config); 199 }; 200 201 /** 202 * struct serial_dev_priv - information about a device used by the uclass 203 * 204 * @sdev: stdio device attached to this uart 205 * 206 * @buf: Pointer to the RX buffer 207 * @rd_ptr: Read pointer in the RX buffer 208 * @wr_ptr: Write pointer in the RX buffer 209 */ 210 struct serial_dev_priv { 211 struct stdio_dev *sdev; 212 213 char *buf; 214 int rd_ptr; 215 int wr_ptr; 216 }; 217 218 /* Access the serial operations for a device */ 219 #define serial_get_ops(dev) ((struct dm_serial_ops *)(dev)->driver->ops) 220 221 void atmel_serial_initialize(void); 222 void mcf_serial_initialize(void); 223 void mpc85xx_serial_initialize(void); 224 void mpc8xx_serial_initialize(void); 225 void mxc_serial_initialize(void); 226 void ns16550_serial_initialize(void); 227 void pl01x_serial_initialize(void); 228 void pxa_serial_initialize(void); 229 void sh_serial_initialize(void); 230 231 #endif 232