diff options
author | Linus Torvalds | 2013-02-21 15:12:17 -0800 |
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committer | Linus Torvalds | 2013-02-21 15:12:18 -0800 |
commit | 5ce7aba976ebdfbf467e3cbcd3a7536ebdec4b11 (patch) | |
tree | a31ceb4a167035aad73fd116ee8512fca905fd7b /drivers/dma/coh901318.h | |
parent | 7ae1c76ee5b58fe5bd55a07f99a3359333270b86 (diff) | |
parent | b6a03d0492dedb5c10b8a5708ee92e04b0590c07 (diff) |
Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver specific changes from Arnd Bergmann:
- Updates to the ux500 cpufreq code
- Moving the u300 DMA controller driver to drivers/dma
- Moving versatile express drivers out of arch/arm for sharing with arch/arm64
- Device tree bindings for the OMAP General Purpose Memory Controller
* tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (27 commits)
ARM: OMAP2+: gpmc: Add device tree documentation for elm handle
ARM: OMAP2+: gpmc: add DT bindings for OneNAND
ARM: OMAP2+: gpmc-onenand: drop __init annotation
mtd: omap-onenand: pass device_node in platform data
ARM: OMAP2+: Prevent potential crash if GPMC probe fails
ARM: OMAP2+: gpmc: Remove unneeded of_node_put()
arm: Move sp810.h to include/linux/amba/
ARM: OMAP: gpmc: add DT bindings for GPMC timings and NAND
ARM: OMAP: gpmc: enable hwecc for AM33xx SoCs
ARM: OMAP: gpmc-nand: drop __init annotation
mtd: omap-nand: pass device_node in platform data
ARM: OMAP: gpmc: don't create devices from initcall on DT
dma: coh901318: cut down on platform data abstraction
dma: coh901318: merge header files
dma: coh901318: push definitions into driver
dma: coh901318: push header down into the DMA subsystem
dma: coh901318: skip hard-coded addresses
dma: coh901318: remove hardcoded target addresses
dma: coh901318: push platform data into driver
dma: coh901318: create a proper platform data file
...
Diffstat (limited to 'drivers/dma/coh901318.h')
-rw-r--r-- | drivers/dma/coh901318.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/dma/coh901318.h b/drivers/dma/coh901318.h new file mode 100644 index 000000000000..95ce1e2123ec --- /dev/null +++ b/drivers/dma/coh901318.h @@ -0,0 +1,141 @@ +/* + * Copyright (C) 2007-2013 ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + * DMA driver for COH 901 318 + * Author: Per Friden <per.friden@stericsson.com> + */ + +#ifndef COH901318_H +#define COH901318_H + +#define MAX_DMA_PACKET_SIZE_SHIFT 11 +#define MAX_DMA_PACKET_SIZE (1 << MAX_DMA_PACKET_SIZE_SHIFT) + +struct device; + +struct coh901318_pool { + spinlock_t lock; + struct dma_pool *dmapool; + struct device *dev; + +#ifdef CONFIG_DEBUG_FS + int debugfs_pool_counter; +#endif +}; + +/** + * struct coh901318_lli - linked list item for DMAC + * @control: control settings for DMAC + * @src_addr: transfer source address + * @dst_addr: transfer destination address + * @link_addr: physical address to next lli + * @virt_link_addr: virtual address of next lli (only used by pool_free) + * @phy_this: physical address of current lli (only used by pool_free) + */ +struct coh901318_lli { + u32 control; + dma_addr_t src_addr; + dma_addr_t dst_addr; + dma_addr_t link_addr; + + void *virt_link_addr; + dma_addr_t phy_this; +}; + +/** + * coh901318_pool_create() - Creates an dma pool for lli:s + * @pool: pool handle + * @dev: dma device + * @lli_nbr: number of lli:s in the pool + * @algin: address alignemtn of lli:s + * returns 0 on success otherwise none zero + */ +int coh901318_pool_create(struct coh901318_pool *pool, + struct device *dev, + size_t lli_nbr, size_t align); + +/** + * coh901318_pool_destroy() - Destroys the dma pool + * @pool: pool handle + * returns 0 on success otherwise none zero + */ +int coh901318_pool_destroy(struct coh901318_pool *pool); + +/** + * coh901318_lli_alloc() - Allocates a linked list + * + * @pool: pool handle + * @len: length to list + * return: none NULL if success otherwise NULL + */ +struct coh901318_lli * +coh901318_lli_alloc(struct coh901318_pool *pool, + unsigned int len); + +/** + * coh901318_lli_free() - Returns the linked list items to the pool + * @pool: pool handle + * @lli: reference to lli pointer to be freed + */ +void coh901318_lli_free(struct coh901318_pool *pool, + struct coh901318_lli **lli); + +/** + * coh901318_lli_fill_memcpy() - Prepares the lli:s for dma memcpy + * @pool: pool handle + * @lli: allocated lli + * @src: src address + * @size: transfer size + * @dst: destination address + * @ctrl_chained: ctrl for chained lli + * @ctrl_last: ctrl for the last lli + * returns number of CPU interrupts for the lli, negative on error. + */ +int +coh901318_lli_fill_memcpy(struct coh901318_pool *pool, + struct coh901318_lli *lli, + dma_addr_t src, unsigned int size, + dma_addr_t dst, u32 ctrl_chained, u32 ctrl_last); + +/** + * coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer + * @pool: pool handle + * @lli: allocated lli + * @buf: transfer buffer + * @size: transfer size + * @dev_addr: address of periphal + * @ctrl_chained: ctrl for chained lli + * @ctrl_last: ctrl for the last lli + * @dir: direction of transfer (to or from device) + * returns number of CPU interrupts for the lli, negative on error. + */ +int +coh901318_lli_fill_single(struct coh901318_pool *pool, + struct coh901318_lli *lli, + dma_addr_t buf, unsigned int size, + dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_last, + enum dma_transfer_direction dir); + +/** + * coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer + * @pool: pool handle + * @lli: allocated lli + * @sg: scatter gather list + * @nents: number of entries in sg + * @dev_addr: address of periphal + * @ctrl_chained: ctrl for chained lli + * @ctrl: ctrl of middle lli + * @ctrl_last: ctrl for the last lli + * @dir: direction of transfer (to or from device) + * @ctrl_irq_mask: ctrl mask for CPU interrupt + * returns number of CPU interrupts for the lli, negative on error. + */ +int +coh901318_lli_fill_sg(struct coh901318_pool *pool, + struct coh901318_lli *lli, + struct scatterlist *sg, unsigned int nents, + dma_addr_t dev_addr, u32 ctrl_chained, + u32 ctrl, u32 ctrl_last, + enum dma_transfer_direction dir, u32 ctrl_irq_mask); + +#endif /* COH901318_H */ |