diff options
Diffstat (limited to 'arch/arm/mach-u300')
| -rw-r--r-- | arch/arm/mach-u300/include/mach/coh901318.h | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/arch/arm/mach-u300/include/mach/coh901318.h b/arch/arm/mach-u300/include/mach/coh901318.h new file mode 100644 index 00000000000..f4cfee9c7d2 --- /dev/null +++ b/arch/arm/mach-u300/include/mach/coh901318.h @@ -0,0 +1,281 @@ +/* + * + * include/linux/coh901318.h + * + * + * Copyright (C) 2007-2009 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 + +#include <linux/device.h> +#include <linux/dmaengine.h> + +#define MAX_DMA_PACKET_SIZE_SHIFT 11 +#define MAX_DMA_PACKET_SIZE (1 << MAX_DMA_PACKET_SIZE_SHIFT) + +/** + * 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 addres 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; +}; +/** + * struct coh901318_params - parameters for DMAC configuration + * @config: DMA config register + * @ctrl_lli_last: DMA control register for the last lli in the list + * @ctrl_lli: DMA control register for an lli + * @ctrl_lli_chained: DMA control register for a chained lli + */ +struct coh901318_params { + u32 config; + u32 ctrl_lli_last; + u32 ctrl_lli; + u32 ctrl_lli_chained; +}; +/** + * struct coh_dma_channel - dma channel base + * @name: ascii name of dma channel + * @number: channel id number + * @desc_nbr_max: number of preallocated descriptortors + * @priority_high: prio of channel, 0 low otherwise high. + * @param: configuration parameters + * @dev_addr: physical address of periphal connected to channel + */ +struct coh_dma_channel { + const char name[32]; + const int number; + const int desc_nbr_max; + const int priority_high; + const struct coh901318_params param; + const dma_addr_t dev_addr; +}; + +/** + * dma_access_memory_state_t - register dma for memory access + * + * @dev: The dma device + * @active: 1 means dma intends to access memory + * 0 means dma wont access memory + */ +typedef void (*dma_access_memory_state_t)(struct device *dev, + bool active); + +/** + * struct powersave - DMA power save structure + * @lock: lock protecting data in this struct + * @started_channels: bit mask indicating active dma channels + */ +struct powersave { + spinlock_t lock; + u64 started_channels; +}; +/** + * struct coh901318_platform - platform arch structure + * @chans_slave: specifying dma slave channels + * @chans_memcpy: specifying dma memcpy channels + * @access_memory_state: requesting DMA memeory access (on / off) + * @chan_conf: dma channel configurations + * @max_channels: max number of dma chanenls + */ +struct coh901318_platform { + const int *chans_slave; + const int *chans_memcpy; + const dma_access_memory_state_t access_memory_state; + const struct coh_dma_channel *chan_conf; + const int max_channels; +}; + +/** + * coh901318_get_bytes_left() - Get number of bytes left on a current transfer + * @chan: dma channel handle + * return number of bytes left, or negative on error + */ +u32 coh901318_get_bytes_left(struct dma_chan *chan); + +/** + * coh901318_stop() - Stops dma transfer + * @chan: dma channel handle + * return 0 on success otherwise negative value + */ +void coh901318_stop(struct dma_chan *chan); + +/** + * coh901318_continue() - Resumes a stopped dma transfer + * @chan: dma channel handle + * return 0 on success otherwise negative value + */ +void coh901318_continue(struct dma_chan *chan); + +/** + * coh901318_filter_id() - DMA channel filter function + * @chan: dma channel handle + * @chan_id: id of dma channel to be filter out + * + * In dma_request_channel() it specifies what channel id to be requested + */ +bool coh901318_filter_id(struct dma_chan *chan, void *chan_id); + +/* + * DMA Controller - this access the static mappings of the coh901318 dma. + * + */ + +#define COH901318_MOD32_MASK (0x1F) +#define COH901318_WORD_MASK (0xFFFFFFFF) +/* INT_STATUS - Interrupt Status Registers 32bit (R/-) */ +#define COH901318_INT_STATUS1 (0x0000) +#define COH901318_INT_STATUS2 (0x0004) +/* TC_INT_STATUS - Terminal Count Interrupt Status Registers 32bit (R/-) */ +#define COH901318_TC_INT_STATUS1 (0x0008) +#define COH901318_TC_INT_STATUS2 (0x000C) +/* TC_INT_CLEAR - Terminal Count Interrupt Clear Registers 32bit (-/W) */ +#define COH901318_TC_INT_CLEAR1 (0x0010) +#define COH901318_TC_INT_CLEAR2 (0x0014) +/* RAW_TC_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */ +#define COH901318_RAW_TC_INT_STATUS1 (0x0018) +#define COH901318_RAW_TC_INT_STATUS2 (0x001C) +/* BE_INT_STATUS - Bus Error Interrupt Status Registers 32bit (R/-) */ +#define COH901318_BE_INT_STATUS1 (0x0020) +#define COH901318_BE_INT_STATUS2 (0x0024) +/* BE_INT_CLEAR - Bus Error Interrupt Clear Registers 32bit (-/W) */ +#define COH901318_BE_INT_CLEAR1 (0x0028) +#define COH901318_BE_INT_CLEAR2 (0x002C) +/* RAW_BE_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */ +#define COH901318_RAW_BE_INT_STATUS1 (0x0030) +#define COH901318_RAW_BE_INT_STATUS2 (0x0034) + +/* + * CX_CFG - Channel Configuration Registers 32bit (R/W) + */ +#define COH901318_CX_CFG (0x0100) +#define COH901318_CX_CFG_SPACING (0x04) +/* Channel enable activates tha dma job */ +#define COH901318_CX_CFG_CH_ENABLE (0x00000001) +#define COH901318_CX_CFG_CH_DISABLE (0x00000000) +/* Request Mode */ +#define COH901318_CX_CFG_RM_MASK (0x00000006) +#define COH901318_CX_CFG_RM_MEMORY_TO_MEMORY (0x0 << 1) +#define COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY (0x1 << 1) +#define COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY (0x1 << 1) +#define COH901318_CX_CFG_RM_PRIMARY_TO_SECONDARY (0x3 << 1) +#define COH901318_CX_CFG_RM_SECONDARY_TO_PRIMARY (0x3 << 1) +/* Linked channel request field. RM must == 11 */ +#define COH901318_CX_CFG_LCRF_SHIFT 3 +#define COH901318_CX_CFG_LCRF_MASK (0x000001F8) +#define COH901318_CX_CFG_LCR_DISABLE (0x00000000) +/* Terminal Counter Interrupt Request Mask */ +#define COH901318_CX_CFG_TC_IRQ_ENABLE (0x00000200) +#define COH901318_CX_CFG_TC_IRQ_DISABLE (0x00000000) +/* Bus Error interrupt Mask */ +#define COH901318_CX_CFG_BE_IRQ_ENABLE (0x00000400) +#define COH901318_CX_CFG_BE_IRQ_DISABLE (0x00000000) + +/* + * CX_STAT - Channel Status Registers 32bit (R/-) + */ +#define COH901318_CX_STAT (0x0200) +#define COH901318_CX_STAT_SPACING (0x04) +#define COH901318_CX_STAT_RBE_IRQ_IND (0x00000008) +#define COH901318_CX_STAT_RTC_IRQ_IND (0x00000004) +#define COH901318_CX_STAT_ACTIVE (0x00000002) +#define COH901318_CX_STAT_ENABLED (0x00000001) + +/* + * CX_CTRL - Channel Control Registers 32bit (R/W) + */ +#define COH901318_CX_CTRL (0x0400) +#define COH901318_CX_CTRL_SPACING (0x10) +/* Transfer Count Enable */ +#define COH901318_CX_CTRL_TC_ENABLE (0x00001000) +#define COH901318_CX_CTRL_TC_DISABLE (0x00000000) +/* Transfer Count Value 0 - 4095 */ +#define COH901318_CX_CTRL_TC_VALUE_MASK (0x00000FFF) +/* Burst count */ +#define COH901318_CX_CTRL_BURST_COUNT_MASK (0x0000E000) +#define COH901318_CX_CTRL_BURST_COUNT_64_BYTES (0x7 << 13) +#define COH901318_CX_CTRL_BURST_COUNT_48_BYTES (0x6 << 13) +#define COH901318_CX_CTRL_BURST_COUNT_32_BYTES (0x5 << 13) +#define COH901318_CX_CTRL_BURST_COUNT_16_BYTES (0x4 << 13) +#define COH901318_CX_CTRL_BURST_COUNT_8_BYTES (0x3 << 13) +#define COH901318_CX_CTRL_BURST_COUNT_4_BYTES (0x2 << 13) +#define COH901318_CX_CTRL_BURST_COUNT_2_BYTES (0x1 << 13) +#define COH901318_CX_CTRL_BURST_COUNT_1_BYTE (0x0 << 13) +/* Source bus size */ +#define COH901318_CX_CTRL_SRC_BUS_SIZE_MASK (0x00030000) +#define COH901318_CX_CTRL_SRC_BUS_SIZE_32_BITS (0x2 << 16) +#define COH901318_CX_CTRL_SRC_BUS_SIZE_16_BITS (0x1 << 16) +#define COH901318_CX_CTRL_SRC_BUS_SIZE_8_BITS (0x0 << 16) +/* Source address increment */ +#define COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE (0x00040000) +#define COH901318_CX_CTRL_SRC_ADDR_INC_DISABLE (0x00000000) +/* Destination Bus Size */ +#define COH901318_CX_CTRL_DST_BUS_SIZE_MASK (0x00180000) +#define COH901318_CX_CTRL_DST_BUS_SIZE_32_BITS (0x2 << 19) +#define COH901318_CX_CTRL_DST_BUS_SIZE_16_BITS (0x1 << 19) +#define COH901318_CX_CTRL_DST_BUS_SIZE_8_BITS (0x0 << 19) +/* Destination address increment */ +#define COH901318_CX_CTRL_DST_ADDR_INC_ENABLE (0x00200000) +#define COH901318_CX_CTRL_DST_ADDR_INC_DISABLE (0x00000000) +/* Master Mode (Master2 is only connected to MSL) */ +#define COH901318_CX_CTRL_MASTER_MODE_MASK (0x00C00000) +#define COH901318_CX_CTRL_MASTER_MODE_M2R_M1W (0x3 << 22) +#define COH901318_CX_CTRL_MASTER_MODE_M1R_M2W (0x2 << 22) +#define COH901318_CX_CTRL_MASTER_MODE_M2RW (0x1 << 22) +#define COH901318_CX_CTRL_MASTER_MODE_M1RW (0x0 << 22) +/* Terminal Count flag to PER enable */ +#define COH901318_CX_CTRL_TCP_ENABLE (0x01000000) +#define COH901318_CX_CTRL_TCP_DISABLE (0x00000000) +/* Terminal Count flags to CPU enable */ +#define COH901318_CX_CTRL_TC_IRQ_ENABLE (0x02000000) +#define COH901318_CX_CTRL_TC_IRQ_DISABLE (0x00000000) +/* Hand shake to peripheral */ +#define COH901318_CX_CTRL_HSP_ENABLE (0x04000000) +#define COH901318_CX_CTRL_HSP_DISABLE (0x00000000) +#define COH901318_CX_CTRL_HSS_ENABLE (0x08000000) +#define COH901318_CX_CTRL_HSS_DISABLE (0x00000000) +/* DMA mode */ +#define COH901318_CX_CTRL_DDMA_MASK (0x30000000) +#define COH901318_CX_CTRL_DDMA_LEGACY (0x0 << 28) +#define COH901318_CX_CTRL_DDMA_DEMAND_DMA1 (0x1 << 28) +#define COH901318_CX_CTRL_DDMA_DEMAND_DMA2 (0x2 << 28) +/* Primary Request Data Destination */ +#define COH901318_CX_CTRL_PRDD_MASK (0x40000000) +#define COH901318_CX_CTRL_PRDD_DEST (0x1 << 30) +#define COH901318_CX_CTRL_PRDD_SOURCE (0x0 << 30) + +/* + * CX_SRC_ADDR - Channel Source Address Registers 32bit (R/W) + */ +#define COH901318_CX_SRC_ADDR (0x0404) +#define COH901318_CX_SRC_ADDR_SPACING (0x10) + +/* + * CX_DST_ADDR - Channel Destination Address Registers 32bit R/W + */ +#define COH901318_CX_DST_ADDR (0x0408) +#define COH901318_CX_DST_ADDR_SPACING (0x10) + +/* + * CX_LNK_ADDR - Channel Link Address Registers 32bit (R/W) + */ +#define COH901318_CX_LNK_ADDR (0x040C) +#define COH901318_CX_LNK_ADDR_SPACING (0x10) +#define COH901318_CX_LNK_LINK_IMMEDIATE (0x00000001) +#endif /* COH901318_H */ |