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Added z85c30 specific probe routine to decide what the clock rate was.

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This routines could be enhanced to determine if the SCC is present
since it appears from the DY-4 manual that a status registers indicates
this.
This commit is contained in:
Joel Sherrill
1998-07-18 17:47:50 +00:00
parent f8a5d54ea8
commit a4d34dd20d
2 changed files with 52 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
c/src/lib/libbsp/powerpc/dmv177/console/config.c
+26 -4
View File
@@ -141,7 +141,10 @@ mc68681_baud_t
#define Z85C30_FUNCTIONS &z85c30_fns_polled
#endif
boolean dmv177_z85c30_probe(int minor);
console_tbl Console_Port_Tbl[] = {
#if (0)
{
"/dev/com0", /* sDeviceName */
SERIAL_MC68681, /* deviceType */
@@ -180,11 +183,12 @@ console_tbl Console_Port_Tbl[] = {
(unsigned32)dmv177_mc68681_baud_table, /* ulClock */
DMV170_DUART_IRQ /* ulIntVector */
},
#endif
{
"/dev/com3", /* sDeviceName */
SERIAL_Z85C30, /* deviceType */
Z85C30_FUNCTIONS, /* pDeviceFns */
NULL, /* deviceProbe */
dmv177_z85c30_probe, /* deviceProbe */
NULL, /* pDeviceFlow */
16, /* ulMargin */
8, /* ulHysteresis */
@@ -196,14 +200,14 @@ console_tbl Console_Port_Tbl[] = {
z85c30_set_register, /* setRegister */
z85c30_get_data, /* getData */
z85c30_set_data, /* setData */
Z85C30_CLOCK, /* ulClock */
0, /* filled in by probe */ /* ulClock */
DMV170_SCC_IRQ /* ulIntVector */
},
{
"/dev/com4", /* sDeviceName */
SERIAL_Z85C30, /* deviceType */
Z85C30_FUNCTIONS, /* pDeviceFns */
NULL, /* deviceProbe */
dmv177_z85c30_probe, /* deviceProbe */
NULL, /* pDeviceFlow */
16, /* ulMargin */
8, /* ulHysteresis */
@@ -215,7 +219,7 @@ console_tbl Console_Port_Tbl[] = {
z85c30_set_register, /* setRegister */
z85c30_get_data, /* getData */
z85c30_set_data, /* setData */
Z85C30_CLOCK, /* ulClock */
0, /* filled in by probe */ /* ulClock */
DMV170_SCC_IRQ /* ulIntVector */
}
};
@@ -231,3 +235,21 @@ unsigned long Console_Port_Count = NUM_CONSOLE_PORTS;
console_data Console_Port_Data[NUM_CONSOLE_PORTS];
rtems_device_minor_number Console_Port_Minor;
boolean dmv177_z85c30_probe(int minor)
{
volatile unsigned32 *dma_control_status_reg;
/*
* Figure out the clock speed of the Z85C30 SCC
*/
dma_control_status_reg = DMV170_DMA_CONTROL_STATUS_REG;
if ( *dma_control_status_reg & DMV170_SCC_10MHZ )
Console_Port_Tbl[minor].ulClock = Z85C30_CLOCK_10;
else
Console_Port_Tbl[minor].ulClock = Z85C30_CLOCK_2;
return TRUE;
}
c/src/lib/libbsp/powerpc/dmv177/console/conscfg.c
+26 -4
View File
@@ -141,7 +141,10 @@ mc68681_baud_t
#define Z85C30_FUNCTIONS &z85c30_fns_polled
#endif
boolean dmv177_z85c30_probe(int minor);
console_tbl Console_Port_Tbl[] = {
#if (0)
{
"/dev/com0", /* sDeviceName */
SERIAL_MC68681, /* deviceType */
@@ -180,11 +183,12 @@ console_tbl Console_Port_Tbl[] = {
(unsigned32)dmv177_mc68681_baud_table, /* ulClock */
DMV170_DUART_IRQ /* ulIntVector */
},
#endif
{
"/dev/com3", /* sDeviceName */
SERIAL_Z85C30, /* deviceType */
Z85C30_FUNCTIONS, /* pDeviceFns */
NULL, /* deviceProbe */
dmv177_z85c30_probe, /* deviceProbe */
NULL, /* pDeviceFlow */
16, /* ulMargin */
8, /* ulHysteresis */
@@ -196,14 +200,14 @@ console_tbl Console_Port_Tbl[] = {
z85c30_set_register, /* setRegister */
z85c30_get_data, /* getData */
z85c30_set_data, /* setData */
Z85C30_CLOCK, /* ulClock */
0, /* filled in by probe */ /* ulClock */
DMV170_SCC_IRQ /* ulIntVector */
},
{
"/dev/com4", /* sDeviceName */
SERIAL_Z85C30, /* deviceType */
Z85C30_FUNCTIONS, /* pDeviceFns */
NULL, /* deviceProbe */
dmv177_z85c30_probe, /* deviceProbe */
NULL, /* pDeviceFlow */
16, /* ulMargin */
8, /* ulHysteresis */
@@ -215,7 +219,7 @@ console_tbl Console_Port_Tbl[] = {
z85c30_set_register, /* setRegister */
z85c30_get_data, /* getData */
z85c30_set_data, /* setData */
Z85C30_CLOCK, /* ulClock */
0, /* filled in by probe */ /* ulClock */
DMV170_SCC_IRQ /* ulIntVector */
}
};
@@ -231,3 +235,21 @@ unsigned long Console_Port_Count = NUM_CONSOLE_PORTS;
console_data Console_Port_Data[NUM_CONSOLE_PORTS];
rtems_device_minor_number Console_Port_Minor;
boolean dmv177_z85c30_probe(int minor)
{
volatile unsigned32 *dma_control_status_reg;
/*
* Figure out the clock speed of the Z85C30 SCC
*/
dma_control_status_reg = DMV170_DMA_CONTROL_STATUS_REG;
if ( *dma_control_status_reg & DMV170_SCC_10MHZ )
Console_Port_Tbl[minor].ulClock = Z85C30_CLOCK_10;
else
Console_Port_Tbl[minor].ulClock = Z85C30_CLOCK_2;
return TRUE;
}