diff options
Diffstat (limited to 'arch/arm/mach-pxa/pxa3xx.c')
| -rw-r--r-- | arch/arm/mach-pxa/pxa3xx.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c index ce0f8d6242e2..06005d3f2ba3 100644 --- a/arch/arm/mach-pxa/pxa3xx.c +++ b/arch/arm/mach-pxa/pxa3xx.c @@ -47,6 +47,13 @@ extern void __init pxa_dt_irq_init(int (*fn)(struct irq_data *, unsigned int)); #define ISRAM_START 0x5c000000 #define ISRAM_SIZE SZ_256K +/* + * NAND NFC: DFI bus arbitration subset + */ +#define NDCR (*(volatile u32 __iomem*)(NAND_VIRT + 0)) +#define NDCR_ND_ARB_EN (1 << 12) +#define NDCR_ND_ARB_CNTL (1 << 19) + static void __iomem *sram; static unsigned long wakeup_src; @@ -362,7 +369,12 @@ static struct map_desc pxa3xx_io_desc[] __initdata = { .pfn = __phys_to_pfn(PXA3XX_SMEMC_BASE), .length = SMEMC_SIZE, .type = MT_DEVICE - } + }, { + .virtual = (unsigned long)NAND_VIRT, + .pfn = __phys_to_pfn(NAND_PHYS), + .length = NAND_SIZE, + .type = MT_DEVICE + }, }; void __init pxa3xx_map_io(void) @@ -419,6 +431,13 @@ static int __init pxa3xx_init(void) */ ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); + /* + * Disable DFI bus arbitration, to prevent a system bus lock if + * somebody disables the NAND clock (unused clock) while this + * bit remains set. + */ + NDCR = (NDCR & ~NDCR_ND_ARB_EN) | NDCR_ND_ARB_CNTL; + if ((ret = pxa_init_dma(IRQ_DMA, 32))) return ret; |