3 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB)
24 #if defined(CONFIG_S3C2400) || defined(CONFIG_TRAB)
26 #elif defined(CONFIG_S3C2410)
30 DECLARE_GLOBAL_DATA_PTR;
33 #define UART_NR S3C24X0_UART0
35 #elif defined(CONFIG_SERIAL2)
36 # if defined(CONFIG_TRAB)
37 # error "TRAB supports only CONFIG_SERIAL1"
39 #define UART_NR S3C24X0_UART1
41 #elif defined(CONFIG_SERIAL3)
42 # if defined(CONFIG_TRAB)
43 # #error "TRAB supports only CONFIG_SERIAL1"
45 #define UART_NR S3C24X0_UART2
48 #error "Bad: you didn't configure serial ..."
51 #if defined(CONFIG_SERIAL_MULTI)
54 /* Multi serial device functions */
55 #define DECLARE_S3C_SERIAL_FUNCTIONS(port) \
56 int s3serial##port##_init (void) {\
57 return serial_init_dev(port);}\
58 void s3serial##port##_setbrg (void) {\
59 serial_setbrg_dev(port);}\
60 int s3serial##port##_getc (void) {\
61 return serial_getc_dev(port);}\
62 int s3serial##port##_tstc (void) {\
63 return serial_tstc_dev(port);}\
64 void s3serial##port##_putc (const char c) {\
65 serial_putc_dev(port, c);}\
66 void s3serial##port##_puts (const char *s) {\
67 serial_puts_dev(port, s);}
69 #define INIT_S3C_SERIAL_STRUCTURE(port,name,bus) {\
72 s3serial##port##_init,\
73 s3serial##port##_setbrg,\
74 s3serial##port##_getc,\
75 s3serial##port##_tstc,\
76 s3serial##port##_putc,\
77 s3serial##port##_puts, }
79 #endif /* CONFIG_SERIAL_MULTI */
81 void _serial_setbrg(const int dev_index)
83 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
87 /* value is calculated so : (int)(PCLK/16./baudrate) -1 */
88 reg = get_PCLK() / (16 * gd->baudrate) - 1;
91 for (i = 0; i < 100; i++);
93 #if defined(CONFIG_SERIAL_MULTI)
95 serial_setbrg_dev(unsigned int dev_index)
97 _serial_setbrg(dev_index);
100 void serial_setbrg(void)
102 _serial_setbrg(UART_NR);
107 /* Initialise the serial port. The settings are always 8 data bits, no parity,
108 * 1 stop bit, no start bits.
110 static int serial_init_dev(const int dev_index)
112 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
114 /* FIFO enable, Tx/Rx FIFO clear */
118 /* Normal,No parity,1 stop,8 bit */
121 * tx=level,rx=edge,disable timeout int.,enable rx error int.,
122 * normal,interrupt or polling
127 uart->UMCON = 0x1; /* RTS up */
130 /* FIXME: This is sooooooooooooooooooo ugly */
131 #if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2)
132 /* we need auto hw flow control on the gsm and gps port */
133 if (dev_index == 0 || dev_index == 1)
136 _serial_setbrg(dev_index);
141 #if !defined(CONFIG_SERIAL_MULTI)
142 /* Initialise the serial port. The settings are always 8 data bits, no parity,
143 * 1 stop bit, no start bits.
145 int serial_init (void)
147 return serial_init_dev(UART_NR);
152 * Read a single byte from the serial port. Returns 1 on success, 0
153 * otherwise. When the function is succesfull, the character read is
154 * written into its argument c.
156 int _serial_getc (const int dev_index)
158 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
160 /* wait for character to arrive */
161 while (!(uart->UTRSTAT & 0x1));
163 return uart->URXH & 0xff;
165 #if defined(CONFIG_SERIAL_MULTI)
166 static inline int serial_getc_dev(unsigned int dev_index)
168 return _serial_getc(dev_index);
171 int serial_getc (void)
173 return _serial_getc(UART_NR);
178 static int hwflow = 0; /* turned off by default */
179 int hwflow_onoff(int on)
184 break; /* return current */
186 hwflow = 1; /* turn on */
189 hwflow = 0; /* turn off */
196 #ifdef CONFIG_MODEM_SUPPORT
197 static int be_quiet = 0;
198 void disable_putc(void)
203 void enable_putc(void)
211 * Output a single byte to the serial port.
213 void _serial_putc (const char c, const int dev_index)
215 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
216 #ifdef CONFIG_MODEM_SUPPORT
221 /* wait for room in the tx FIFO */
222 while (!(uart->UTRSTAT & 0x2));
225 /* Wait for CTS up */
226 while(hwflow && !(uart->UMSTAT & 0x1))
232 /* If \n, also do \r */
236 #if defined(CONFIG_SERIAL_MULTI)
237 static inline void serial_putc_dev(unsigned int dev_index, const char c)
239 _serial_putc(c, dev_index);
242 void serial_putc(const char c)
244 _serial_putc(c, UART_NR);
250 * Test whether a character is in the RX buffer
252 int _serial_tstc(const int dev_index)
254 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
256 return uart->UTRSTAT & 0x1;
258 #if defined(CONFIG_SERIAL_MULTI)
260 serial_tstc_dev(unsigned int dev_index)
262 return _serial_tstc(dev_index);
265 int serial_tstc(void)
267 return _serial_tstc(UART_NR);
271 void _serial_puts(const char *s, const int dev_index)
274 _serial_putc (*s++, dev_index);
277 #if defined(CONFIG_SERIAL_MULTI)
279 serial_puts_dev(int dev_index, const char *s)
281 _serial_puts(s, dev_index);
285 serial_puts (const char *s)
287 _serial_puts(s, UART_NR);
291 #if defined(CONFIG_SERIAL_MULTI)
292 DECLARE_S3C_SERIAL_FUNCTIONS(0);
293 struct serial_device s3c24xx_serial0_device =
294 INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0", "S3UART1");
295 DECLARE_S3C_SERIAL_FUNCTIONS(1);
296 struct serial_device s3c24xx_serial1_device =
297 INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1", "S3UART2");
298 DECLARE_S3C_SERIAL_FUNCTIONS(2);
299 struct serial_device s3c24xx_serial2_device =
300 INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3");
302 #endif /* CONFIG_SERIAL_MULTI */
304 #endif /* defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) */