2 * Simple serial driver for Cogent motherboard serial ports
7 #include <board/cogent/serial.h>
9 #include <linux/compiler.h>
11 DECLARE_GLOBAL_DATA_PTR;
13 #if (CMA_MB_CAPS & CMA_MB_CAP_SERPAR)
15 #if (defined(CONFIG_8xx) && defined(CONFIG_8xx_CONS_NONE)) || \
16 (defined(CONFIG_8260) && defined(CONFIG_CONS_NONE))
18 #if CONFIG_CONS_INDEX == 1
19 #define CMA_MB_SERIAL_BASE CMA_MB_SERIALA_BASE
20 #elif CONFIG_CONS_INDEX == 2
21 #define CMA_MB_SERIAL_BASE CMA_MB_SERIALB_BASE
22 #elif CONFIG_CONS_INDEX == 3 && (CMA_MB_CAPS & CMA_MB_CAP_SER2)
23 #define CMA_MB_SERIAL_BASE CMA_MB_SER2A_BASE
24 #elif CONFIG_CONS_INDEX == 4 && (CMA_MB_CAPS & CMA_MB_CAP_SER2)
25 #define CMA_MB_SERIAL_BASE CMA_MB_SER2B_BASE
27 #error CONFIG_CONS_INDEX must be configured for Cogent motherboard serial
30 static int cogent_serial_init(void)
32 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_SERIAL_BASE;
34 cma_mb_reg_write (&mbsp->ser_ier, 0x00); /* turn off interrupts */
36 cma_mb_reg_write (&mbsp->ser_lcr, 0x03); /* 8 data, 1 stop, no parity */
37 cma_mb_reg_write (&mbsp->ser_mcr, 0x03); /* RTS/DTR */
38 cma_mb_reg_write (&mbsp->ser_fcr, 0x07); /* Clear & enable FIFOs */
43 static void cogent_serial_setbrg(void)
45 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_SERIAL_BASE;
49 if ((divisor = br_to_div (gd->baudrate)) == 0)
52 lcr = cma_mb_reg_read (&mbsp->ser_lcr);
53 cma_mb_reg_write (&mbsp->ser_lcr, lcr | 0x80); /* Access baud rate(set DLAB) */
54 cma_mb_reg_write (&mbsp->ser_brl, divisor & 0xff);
55 cma_mb_reg_write (&mbsp->ser_brh, (divisor >> 8) & 0xff);
56 cma_mb_reg_write (&mbsp->ser_lcr, lcr); /* unset DLAB */
59 static void cogent_serial_putc(const char c)
61 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_SERIAL_BASE;
66 while ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_THRE) == 0);
68 cma_mb_reg_write (&mbsp->ser_thr, c);
71 static void cogent_serial_puts(const char *s)
77 static int cogent_serial_getc(void)
79 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_SERIAL_BASE;
81 while ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_DR) == 0);
83 return ((int) cma_mb_reg_read (&mbsp->ser_rhr) & 0x7f);
86 static int cogent_serial_tstc(void)
88 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_SERIAL_BASE;
90 return ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_DR) != 0);
93 static struct serial_device cogent_serial_drv = {
94 .name = "cogent_serial",
95 .start = cogent_serial_init,
97 .setbrg = cogent_serial_setbrg,
98 .putc = cogent_serial_putc,
99 .puts = cogent_serial_puts,
100 .getc = cogent_serial_getc,
101 .tstc = cogent_serial_tstc,
104 void cogent_serial_initialize(void)
106 serial_register(&cogent_serial_drv);
109 __weak struct serial_device *default_serial_console(void)
111 return &cogent_serial_drv;
113 #endif /* CONS_NONE */
115 #if defined(CONFIG_CMD_KGDB) && \
116 defined(CONFIG_KGDB_NONE)
118 #if CONFIG_KGDB_INDEX == CONFIG_CONS_INDEX
119 #error Console and kgdb are on the same serial port - this is not supported
122 #if CONFIG_KGDB_INDEX == 1
123 #define CMA_MB_KGDB_SER_BASE CMA_MB_SERIALA_BASE
124 #elif CONFIG_KGDB_INDEX == 2
125 #define CMA_MB_KGDB_SER_BASE CMA_MB_SERIALB_BASE
126 #elif CONFIG_KGDB_INDEX == 3 && (CMA_MB_CAPS & CMA_MB_CAP_SER2)
127 #define CMA_MB_KGDB_SER_BASE CMA_MB_SER2A_BASE
128 #elif CONFIG_KGDB_INDEX == 4 && (CMA_MB_CAPS & CMA_MB_CAP_SER2)
129 #define CMA_MB_KGDB_SER_BASE CMA_MB_SER2B_BASE
131 #error CONFIG_KGDB_INDEX must be configured for Cogent motherboard serial
134 void kgdb_serial_init (void)
136 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
137 unsigned int divisor;
139 if ((divisor = br_to_div (CONFIG_KGDB_BAUDRATE)) == 0)
142 cma_mb_reg_write (&mbsp->ser_ier, 0x00); /* turn off interrupts */
143 cma_mb_reg_write (&mbsp->ser_lcr, 0x80); /* Access baud rate(set DLAB) */
144 cma_mb_reg_write (&mbsp->ser_brl, divisor & 0xff);
145 cma_mb_reg_write (&mbsp->ser_brh, (divisor >> 8) & 0xff);
146 cma_mb_reg_write (&mbsp->ser_lcr, 0x03); /* 8 data, 1 stop, no parity */
147 cma_mb_reg_write (&mbsp->ser_mcr, 0x03); /* RTS/DTR */
148 cma_mb_reg_write (&mbsp->ser_fcr, 0x07); /* Clear & enable FIFOs */
150 printf ("[on cma10x serial port B] ");
153 void putDebugChar (int c)
155 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
157 while ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_THRE) == 0);
159 cma_mb_reg_write (&mbsp->ser_thr, c & 0xff);
162 void putDebugStr (const char *str)
164 while (*str != '\0') {
167 putDebugChar (*str++);
171 int getDebugChar (void)
173 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
175 while ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_DR) == 0);
177 return ((int) cma_mb_reg_read (&mbsp->ser_rhr) & 0x7f);
180 void kgdb_interruptible (int yes)
182 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
185 printf ("kgdb: turning serial ints on\n");
186 cma_mb_reg_write (&mbsp->ser_ier, 0xf);
188 printf ("kgdb: turning serial ints off\n");
189 cma_mb_reg_write (&mbsp->ser_ier, 0x0);
193 #endif /* KGDB && KGDB_NONE */
195 #endif /* CAPS & SERPAR */