MPC8245 Internal Duart and Linux
I'm using the South Bridge's 8259 controllers and putting the 8245 EPIC in pass through mode, so all internal 8245 interrupts are routed out the L_INT pin to one of the ALI's PCI_IRQ pins.
Does this seem like something very wrong?
I originally thought this would be the easiest way to handle this from an IRQ standpoint, but now know that I have never seen anyone else do this.
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Greg Allen <[email protected]> 04/10/02 05:05PM >>>
{ 0,
BASE_BAUD_8245_DUART,AMX2275_SERIAL_2, 9,STD_COM_FLAGS, /* ttyS2 */ \
iomem_base: (u8 *)AMX2275_SERIAL_2, \
io_type:SERIAL_IO_MEM}, \
{ 0,BASE_BAUD_8245_DUART,AMX2275_SERIAL_3, 9,STD_COM_FLAGS, /* ttyS3 */ \
iomem_base: (u8 *)AMX2275_SERIAL_3, \
io_type:SERIAL_IO_MEM},
This may or may not be the problem, but your IRQs are faulty.
The internal 8245 IRQs are 137 and 138.
You need to call openpic_set_sources() before openpic_init() to get these initialized.
My utx8245_init_IRQ() contains:
openpic_set_sources(0, 32, NULL); /* up to serial interrupt 15 */
openpic_set_sources(129, 3, NULL); /* MPC8245 I2C, DMA0, DMA1 */
openpic_set_sources(134, 1, NULL); /* MPC8245 Message Unit */
openpic_set_sources(137, 2, NULL); /* MPC8245 DUART */
openpic_init(1, 0, 0, -1);L8r,
-Greg
--
Gregory E. Allen, MSEE Engineering Scientist
Applied Research Laboratories:
The University of Texas at Austin
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