3 * Gary Jennejohn, DENX Software Engineering, <garyj@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_TRAB)
24 #elif defined(CONFIG_S3C2410)
28 DECLARE_GLOBAL_DATA_PTR;
31 #define UART_NR S3C24X0_UART0
33 #elif defined(CONFIG_SERIAL2)
34 # if defined(CONFIG_TRAB)
35 # error "TRAB supports only CONFIG_SERIAL1"
37 #define UART_NR S3C24X0_UART1
39 #elif defined(CONFIG_SERIAL3)
40 # if defined(CONFIG_TRAB)
41 # #error "TRAB supports only CONFIG_SERIAL1"
43 #define UART_NR S3C24X0_UART2
46 #error "Bad: you didn't configure serial ..."
49 #if defined(CONFIG_SERIAL_MULTI)
52 /* Multi serial device functions */
53 #define DECLARE_S3C_SERIAL_FUNCTIONS(port) \
54 int s3serial##port##_init (void) {\
55 return serial_init_dev(port);}\
56 void s3serial##port##_setbrg (void) {\
57 serial_setbrg_dev(port);}\
58 int s3serial##port##_getc (void) {\
59 return serial_getc_dev(port);}\
60 int s3serial##port##_tstc (void) {\
61 return serial_tstc_dev(port);}\
62 void s3serial##port##_putc (const char c) {\
63 serial_putc_dev(port, c);}\
64 void s3serial##port##_puts (const char *s) {\
65 serial_puts_dev(port, s);}
67 #define INIT_S3C_SERIAL_STRUCTURE(port,name,bus) {\
70 s3serial##port##_init,\
71 s3serial##port##_setbrg,\
72 s3serial##port##_getc,\
73 s3serial##port##_tstc,\
74 s3serial##port##_putc,\
75 s3serial##port##_puts, }
77 #endif /* CONFIG_SERIAL_MULTI */
79 void _serial_setbrg(const int dev_index)
81 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
85 /* value is calculated so : (int)(PCLK/16./baudrate) -1 */
86 reg = get_PCLK() / (16 * gd->baudrate) - 1;
89 for (i = 0; i < 100; i++);
91 #if defined(CONFIG_SERIAL_MULTI)
93 serial_setbrg_dev(unsigned int dev_index)
95 _serial_setbrg(dev_index);
98 void serial_setbrg(void)
100 _serial_setbrg(UART_NR);
105 /* Initialise the serial port. The settings are always 8 data bits, no parity,
106 * 1 stop bit, no start bits.
108 static int serial_init_dev(const int dev_index)
110 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
112 /* FIFO enable, Tx/Rx FIFO clear */
116 /* Normal,No parity,1 stop,8 bit */
119 * tx=level,rx=edge,disable timeout int.,enable rx error int.,
120 * normal,interrupt or polling
125 uart->UMCON = 0x1; /* RTS up */
128 /* FIXME: This is sooooooooooooooooooo ugly */
129 #if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2)
130 /* we need auto hw flow control on the gsm and gps port */
131 if (dev_index == 0 || dev_index == 1)
134 _serial_setbrg(dev_index);
139 #if !defined(CONFIG_SERIAL_MULTI)
140 /* Initialise the serial port. The settings are always 8 data bits, no parity,
141 * 1 stop bit, no start bits.
143 int serial_init (void)
145 return serial_init_dev(UART_NR);
150 * Read a single byte from the serial port. Returns 1 on success, 0
151 * otherwise. When the function is succesfull, the character read is
152 * written into its argument c.
154 int _serial_getc (const int dev_index)
156 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
158 /* wait for character to arrive */
159 while (!(uart->UTRSTAT & 0x1));
161 return uart->URXH & 0xff;
163 #if defined(CONFIG_SERIAL_MULTI)
164 static inline int serial_getc_dev(unsigned int dev_index)
166 return _serial_getc(dev_index);
169 int serial_getc (void)
171 return _serial_getc(UART_NR);
176 static int hwflow = 0; /* turned off by default */
177 int hwflow_onoff(int on)
182 break; /* return current */
184 hwflow = 1; /* turn on */
187 hwflow = 0; /* turn off */
194 #ifdef CONFIG_MODEM_SUPPORT
195 static int be_quiet = 0;
196 void disable_putc(void)
201 void enable_putc(void)
209 * Output a single byte to the serial port.
211 void _serial_putc (const char c, const int dev_index)
213 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
214 #ifdef CONFIG_MODEM_SUPPORT
219 /* wait for room in the tx FIFO */
220 while (!(uart->UTRSTAT & 0x2));
223 /* Wait for CTS up */
224 while(hwflow && !(uart->UMSTAT & 0x1))
230 /* If \n, also do \r */
234 #if defined(CONFIG_SERIAL_MULTI)
235 static inline void serial_putc_dev(unsigned int dev_index, const char c)
237 _serial_putc(c, dev_index);
240 void serial_putc(const char c)
242 _serial_putc(c, UART_NR);
248 * Test whether a character is in the RX buffer
250 int _serial_tstc(const int dev_index)
252 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index);
254 return uart->UTRSTAT & 0x1;
256 #if defined(CONFIG_SERIAL_MULTI)
258 serial_tstc_dev(unsigned int dev_index)
260 return _serial_tstc(dev_index);
263 int serial_tstc(void)
265 return _serial_tstc(UART_NR);
269 void _serial_puts(const char *s, const int dev_index)
272 _serial_putc (*s++, dev_index);
275 #if defined(CONFIG_SERIAL_MULTI)
277 serial_puts_dev(int dev_index, const char *s)
279 _serial_puts(s, dev_index);
283 serial_puts (const char *s)
285 _serial_puts(s, UART_NR);
289 #if defined(CONFIG_SERIAL_MULTI)
290 DECLARE_S3C_SERIAL_FUNCTIONS(0);
291 struct serial_device s3c24xx_serial0_device =
292 INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0", "S3UART1");
293 DECLARE_S3C_SERIAL_FUNCTIONS(1);
294 struct serial_device s3c24xx_serial1_device =
295 INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1", "S3UART2");
296 DECLARE_S3C_SERIAL_FUNCTIONS(2);
297 struct serial_device s3c24xx_serial2_device =
298 INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3");
300 #endif /* CONFIG_SERIAL_MULTI */