2 * Simple serial driver for Cogent motherboard serial ports
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_MPC8260) && 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 int cogent_serial_getc(void)
73 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_SERIAL_BASE;
75 while ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_DR) == 0);
77 return ((int) cma_mb_reg_read (&mbsp->ser_rhr) & 0x7f);
80 static int cogent_serial_tstc(void)
82 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_SERIAL_BASE;
84 return ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_DR) != 0);
87 static struct serial_device cogent_serial_drv = {
88 .name = "cogent_serial",
89 .start = cogent_serial_init,
91 .setbrg = cogent_serial_setbrg,
92 .putc = cogent_serial_putc,
93 .puts = default_serial_puts,
94 .getc = cogent_serial_getc,
95 .tstc = cogent_serial_tstc,
98 void cogent_serial_initialize(void)
100 serial_register(&cogent_serial_drv);
103 __weak struct serial_device *default_serial_console(void)
105 return &cogent_serial_drv;
107 #endif /* CONS_NONE */
109 #if defined(CONFIG_CMD_KGDB) && \
110 defined(CONFIG_KGDB_NONE)
112 #if CONFIG_KGDB_INDEX == CONFIG_CONS_INDEX
113 #error Console and kgdb are on the same serial port - this is not supported
116 #if CONFIG_KGDB_INDEX == 1
117 #define CMA_MB_KGDB_SER_BASE CMA_MB_SERIALA_BASE
118 #elif CONFIG_KGDB_INDEX == 2
119 #define CMA_MB_KGDB_SER_BASE CMA_MB_SERIALB_BASE
120 #elif CONFIG_KGDB_INDEX == 3 && (CMA_MB_CAPS & CMA_MB_CAP_SER2)
121 #define CMA_MB_KGDB_SER_BASE CMA_MB_SER2A_BASE
122 #elif CONFIG_KGDB_INDEX == 4 && (CMA_MB_CAPS & CMA_MB_CAP_SER2)
123 #define CMA_MB_KGDB_SER_BASE CMA_MB_SER2B_BASE
125 #error CONFIG_KGDB_INDEX must be configured for Cogent motherboard serial
128 void kgdb_serial_init (void)
130 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
131 unsigned int divisor;
133 if ((divisor = br_to_div (CONFIG_KGDB_BAUDRATE)) == 0)
136 cma_mb_reg_write (&mbsp->ser_ier, 0x00); /* turn off interrupts */
137 cma_mb_reg_write (&mbsp->ser_lcr, 0x80); /* Access baud rate(set DLAB) */
138 cma_mb_reg_write (&mbsp->ser_brl, divisor & 0xff);
139 cma_mb_reg_write (&mbsp->ser_brh, (divisor >> 8) & 0xff);
140 cma_mb_reg_write (&mbsp->ser_lcr, 0x03); /* 8 data, 1 stop, no parity */
141 cma_mb_reg_write (&mbsp->ser_mcr, 0x03); /* RTS/DTR */
142 cma_mb_reg_write (&mbsp->ser_fcr, 0x07); /* Clear & enable FIFOs */
144 printf ("[on cma10x serial port B] ");
147 void putDebugChar (int c)
149 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
151 while ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_THRE) == 0);
153 cma_mb_reg_write (&mbsp->ser_thr, c & 0xff);
156 void putDebugStr (const char *str)
158 while (*str != '\0') {
161 putDebugChar (*str++);
165 int getDebugChar (void)
167 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
169 while ((cma_mb_reg_read (&mbsp->ser_lsr) & LSR_DR) == 0);
171 return ((int) cma_mb_reg_read (&mbsp->ser_rhr) & 0x7f);
174 void kgdb_interruptible (int yes)
176 cma_mb_serial *mbsp = (cma_mb_serial *) CMA_MB_KGDB_SER_BASE;
179 printf ("kgdb: turning serial ints on\n");
180 cma_mb_reg_write (&mbsp->ser_ier, 0xf);
182 printf ("kgdb: turning serial ints off\n");
183 cma_mb_reg_write (&mbsp->ser_ier, 0x0);
187 #endif /* KGDB && KGDB_NONE */
189 #endif /* CAPS & SERPAR */