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powerpc/85xx: add fdt_fixup_dma3

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On some SoC(e.g. T2080/T4240) the 3rd DMA is not functional if SRIO2 is
chosen. we add fdt_fixup_dma3() to disable the 3rd DMA if SRIO2 is chosen.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Shengzhou Liu 2014-05-19 15:08:14 +08:00 committed by York Sun
parent fbe79a17fd
commit 605714f669
1 changed files with 47 additions and 0 deletions
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47
arch/powerpc/cpu/mpc85xx/fdt.c
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@ -612,6 +612,51 @@ static void fdt_fixup_usb(void *fdt)
#define fdt_fixup_usb(x)
#endif
#if defined(CONFIG_PPC_T2080) || defined(CONFIG_PPC_T4240) || \
defined(CONFIG_PPC_T4160) || defined(CONFIG_PPC_T4080)
void fdt_fixup_dma3(void *blob)
{
/* the 3rd DMA is not functional if SRIO2 is chosen */
int nodeoff;
ccsr_gur_t __iomem *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
#define CONFIG_SYS_ELO3_DMA3 (0xffe000000 + 0x102300)
#if defined(CONFIG_PPC_T2080)
u32 srds_prtcl_s2 = in_be32(&gur->rcwsr[4]) &
FSL_CORENET2_RCWSR4_SRDS2_PRTCL;
srds_prtcl_s2 >>= FSL_CORENET2_RCWSR4_SRDS2_PRTCL_SHIFT;
switch (srds_prtcl_s2) {
case 0x29:
case 0x2d:
case 0x2e:
#elif defined(CONFIG_PPC_T4240) || defined(CONFIG_PPC_T4160) || \
defined(CONFIG_PPC_T4080)
u32 srds_prtcl_s4 = in_be32(&gur->rcwsr[4]) &
FSL_CORENET2_RCWSR4_SRDS4_PRTCL;
srds_prtcl_s4 >>= FSL_CORENET2_RCWSR4_SRDS4_PRTCL_SHIFT;
switch (srds_prtcl_s4) {
case 6:
case 8:
case 14:
case 16:
#endif
nodeoff = fdt_node_offset_by_compat_reg(blob, "fsl,elo3-dma",
CONFIG_SYS_ELO3_DMA3);
if (nodeoff > 0)
fdt_status_disabled(blob, nodeoff);
else
printf("WARNING: unable to disable dma3\n");
break;
default:
break;
}
}
#else
#define fdt_fixup_dma3(x)
#endif
#if defined(CONFIG_PPC_T1040)
static void fdt_fixup_l2_switch(void *blob)
{
@ -778,6 +823,8 @@ void ft_cpu_setup(void *blob, bd_t *bd)
fdt_fixup_usb(blob);
fdt_fixup_l2_switch(blob);
fdt_fixup_dma3(blob);
}
/*