diff options
Diffstat (limited to 'recipes/linux/linux-2.6.18/avr32-dma-controller-framework.patch')
| -rw-r--r-- | recipes/linux/linux-2.6.18/avr32-dma-controller-framework.patch | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.18/avr32-dma-controller-framework.patch b/recipes/linux/linux-2.6.18/avr32-dma-controller-framework.patch new file mode 100644 index 0000000000..0f6301303b --- /dev/null +++ b/recipes/linux/linux-2.6.18/avr32-dma-controller-framework.patch @@ -0,0 +1,241 @@ +From 740c72fe92a5536060ac6debbfe0a26c0b9b8770 Mon Sep 17 00:00:00 2001 +From: Haavard Skinnemoen <hskinnemoen@atmel.com> +Date: Mon, 11 Sep 2006 17:59:59 +0200 +Subject: [PATCH] AVR32: DMA controller framework + +This patch puts the DMA controller framework used in earlier BSPs back. +It was removed before the AVR32 patches went into -mm, and it should +be removed here as well as soon as we have an alternative. + +--- + arch/avr32/kernel/Makefile | 1 + arch/avr32/kernel/dma-controller.c | 34 +++++++ + include/asm-avr32/dma-controller.h | 165 ++++++++++++++++++++++++++++++++++++ + 3 files changed, 200 insertions(+), 0 deletions(-) + +diff --git a/arch/avr32/kernel/Makefile b/arch/avr32/kernel/Makefile +index 90e5aff..b6afc0c 100644 +--- a/arch/avr32/kernel/Makefile ++++ b/arch/avr32/kernel/Makefile +@@ -9,6 +9,7 @@ obj-y += syscall_table.o syscall-stub + obj-y += setup.o traps.o semaphore.o ptrace.o + obj-y += signal.o sys_avr32.o process.o time.o + obj-y += init_task.o switch_to.o cpu.o ++obj-y += dma-controller.o + obj-$(CONFIG_MODULES) += module.o avr32_ksyms.o + obj-$(CONFIG_KPROBES) += kprobes.o + +diff --git a/arch/avr32/kernel/dma-controller.c b/arch/avr32/kernel/dma-controller.c +new file mode 100644 +index 0000000..fb654b3 +--- /dev/null ++++ b/arch/avr32/kernel/dma-controller.c +@@ -0,0 +1,34 @@ ++/* ++ * Preliminary DMA controller framework for AVR32 ++ * ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++#include <asm/dma-controller.h> ++ ++static LIST_HEAD(controllers); ++ ++int register_dma_controller(struct dma_controller *dmac) ++{ ++ static int next_id; ++ ++ dmac->id = next_id++; ++ list_add_tail(&dmac->list, &controllers); ++ ++ return 0; ++} ++EXPORT_SYMBOL(register_dma_controller); ++ ++struct dma_controller *find_dma_controller(int id) ++{ ++ struct dma_controller *dmac; ++ ++ list_for_each_entry(dmac, &controllers, list) ++ if (dmac->id == id) ++ return dmac; ++ return NULL; ++} ++EXPORT_SYMBOL(find_dma_controller); +diff --git a/include/asm-avr32/dma-controller.h b/include/asm-avr32/dma-controller.h +new file mode 100644 +index 0000000..8c67601 +--- /dev/null ++++ b/include/asm-avr32/dma-controller.h +@@ -0,0 +1,165 @@ ++/* ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++#ifndef __ASM_AVR32_DMA_CONTROLLER_H ++#define __ASM_AVR32_DMA_CONTROLLER_H ++ ++#include <linux/device.h> ++ ++#define DMA_DIR_MEM_TO_MEM 0x0000 ++#define DMA_DIR_MEM_TO_PERIPH 0x0001 ++#define DMA_DIR_PERIPH_TO_MEM 0x0002 ++#define DMA_DIR_PERIPH_TO_PERIPH 0x0003 ++ ++#define DMA_WIDTH_8BIT 0 ++#define DMA_WIDTH_16BIT 1 ++#define DMA_WIDTH_32BIT 2 ++ ++struct dma_request { ++ struct dma_controller *dmac; ++ struct list_head list; ++ ++ unsigned short channel; ++ ++ void (*xfer_complete)(struct dma_request *req); ++ void (*block_complete)(struct dma_request *req); ++ void (*error)(struct dma_request *req); ++}; ++ ++struct dma_request_sg { ++ struct dma_request req; ++ ++ int nr_sg; ++ struct scatterlist *sg; ++ unsigned long block_size; ++ ++ dma_addr_t data_reg; ++ unsigned short periph_id; ++ ++ unsigned char direction; ++ unsigned char width; ++}; ++#define to_dma_request_sg(_req) \ ++ container_of(_req, struct dma_request_sg, req) ++ ++struct dma_request_cyclic { ++ struct dma_request req; ++ ++ int periods; ++ unsigned long buffer_size; ++ ++ dma_addr_t buffer_start; ++ dma_addr_t data_reg; ++ ++ unsigned short periph_id; ++ unsigned char direction; ++ unsigned char width; ++ ++ void *dev_id; ++}; ++#define to_dma_request_cyclic(_req) \ ++ container_of(_req, struct dma_request_cyclic, req) ++ ++struct dma_request_memcpy { ++ struct dma_request req; ++ ++ dma_addr_t src_addr; ++ unsigned int src_width; ++ unsigned int src_stride; ++ ++ dma_addr_t dst_addr; ++ unsigned int dst_width; ++ unsigned int dst_stride; ++ ++ size_t length; ++ ++ unsigned short src_reverse:1; ++ unsigned short dst_reverse:1; ++}; ++#define to_dma_request_memcpy(_req) \ ++ container_of(_req, struct dma_request_memcpy, req) ++ ++struct dma_controller { ++ struct list_head list; ++ int id; ++ struct device *dev; ++ ++ int (*alloc_channel)(struct dma_controller *dmac); ++ void (*release_channel)(struct dma_controller *dmac, ++ int channel); ++ int (*prepare_request_sg)(struct dma_controller *dmac, ++ struct dma_request_sg *req); ++ int (*prepare_request_cyclic)(struct dma_controller *dmac, ++ struct dma_request_cyclic *req); ++ int (*prepare_request_memcpy)(struct dma_controller *dmac, ++ struct dma_request_memcpy *req); ++ int (*start_request)(struct dma_controller *dmac, ++ unsigned int channel); ++ int (*stop_request)(struct dma_controller *dmac, ++ unsigned int channel); ++ dma_addr_t (*get_current_pos)(struct dma_controller *dmac, ++ unsigned int channel); ++}; ++ ++static inline int ++dma_alloc_channel(struct dma_controller *dmac) ++{ ++ return dmac->alloc_channel(dmac); ++} ++ ++static inline void ++dma_release_channel(struct dma_controller *dmac, int chan) ++{ ++ dmac->release_channel(dmac, chan); ++} ++ ++static inline int ++dma_prepare_request_sg(struct dma_controller *dmac, ++ struct dma_request_sg *req) ++{ ++ return dmac->prepare_request_sg(dmac, req); ++} ++ ++static inline int ++dma_prepare_request_cyclic(struct dma_controller *dmac, ++ struct dma_request_cyclic *req) ++{ ++ return dmac->prepare_request_cyclic(dmac, req); ++} ++ ++static inline int ++dma_prepare_request_memcpy(struct dma_controller *dmac, ++ struct dma_request_memcpy *req) ++{ ++ return dmac->prepare_request_memcpy(dmac, req); ++} ++ ++static inline int ++dma_start_request(struct dma_controller *dmac, ++ unsigned int channel) ++{ ++ return dmac->start_request(dmac, channel); ++} ++ ++static inline int ++dma_stop_request(struct dma_controller *dmac, ++ unsigned int channel) ++{ ++ return dmac->stop_request(dmac, channel); ++} ++ ++static inline dma_addr_t ++dma_get_current_pos(struct dma_controller *dmac, ++ unsigned int channel) ++{ ++ return dmac->get_current_pos(dmac, channel); ++} ++ ++extern int register_dma_controller(struct dma_controller *dmac); ++extern struct dma_controller *find_dma_controller(int id); ++ ++#endif /* __ASM_AVR32_DMA_CONTROLLER_H */ +-- +1.4.1.1 + |