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ppc4xx: Enable auto RS485 mode on PLU405 boards
This patch turns on the auto RS485 mode in the 2nd external uart on PLU405 boards. This is a special mode of the used Exar XR16C2850 uart. Because these boards only have a 485 physical layer connected it's a good idea to turn it on by default. Signed-off-by: Matthias Fuchs <mf@esd.eu> Signed-off-by: Stefan Roese <sr@denx.de>
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@ -104,6 +104,7 @@ int misc_init_r (void)
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unsigned char *duart0_mcr = (unsigned char *)((ulong)DUART0_BA + 4);
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unsigned char *duart1_mcr = (unsigned char *)((ulong)DUART1_BA + 4);
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unsigned char *dst;
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unsigned char fctr;
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ulong len = sizeof(fpgadata);
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int status;
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int index;
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@ -203,6 +204,15 @@ int misc_init_r (void)
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out_8(duart0_mcr, 0x08);
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out_8(duart1_mcr, 0x08);
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/*
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* Enable auto RS485 mode in 2nd external uart
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*/
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out_8((void *)DUART1_BA + 3, 0xbf); /* write LCR */
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fctr = in_8((void *)DUART1_BA + 1); /* read FCTR */
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fctr |= 0x08; /* enable RS485 mode */
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out_8((void *)DUART1_BA + 1, fctr); /* write FCTR */
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out_8((void *)DUART1_BA + 3, 0); /* write LCR */
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return (0);
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}
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