/* * * 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 */ #ifndef COH901318_H #define COH901318_H #include #include #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 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; }; /** * 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 descriptors * @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 memory 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; }; #ifdef CONFIG_COH901318 /** * 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); #else static inline bool coh901318_filter_id(struct dma_chan *chan, void *chan_id) { return false; } #endif /* * 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)