1 /* 2 * linux/arch/arm/kernel/dma-ebsa285.c 3 * 4 * Copyright (C) 1998 Phil Blundell 5 * 6 * DMA functions specific to EBSA-285/CATS architectures 7 * 8 * Changelog: 9 * 09-Nov-1998 RMK Split out ISA DMA functions to dma-isa.c 10 * 17-Mar-1999 RMK Allow any EBSA285-like architecture to have 11 * ISA DMA controllers. 12 */ 13 #include <linux/init.h> 14 #include <linux/io.h> 15 #include <linux/spinlock.h> 16 17 #include <asm/dma.h> 18 #include <asm/scatterlist.h> 19 20 #include <asm/mach/dma.h> 21 #include <asm/hardware/dec21285.h> 22 23 #if 0 24 static int fb_dma_request(unsigned int chan, dma_t *dma) 25 { 26 return -EINVAL; 27 } 28 29 static void fb_dma_enable(unsigned int chan, dma_t *dma) 30 { 31 } 32 33 static void fb_dma_disable(unsigned int chan, dma_t *dma) 34 { 35 } 36 37 static struct dma_ops fb_dma_ops = { 38 .type = "fb", 39 .request = fb_dma_request, 40 .enable = fb_dma_enable, 41 .disable = fb_dma_disable, 42 }; 43 #endif 44 fb_dma_init(void)45static int __init fb_dma_init(void) 46 { 47 #if 0 48 dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops; 49 dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops; 50 #endif 51 #ifdef CONFIG_ISA_DMA 52 if (footbridge_cfn_mode()) 53 isa_init_dma(); 54 #endif 55 return 0; 56 } 57 core_initcall(fb_dma_init); 58