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@@ -52,3 +52,153 @@ struct coh901318_params {
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/**
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* struct coh_dma_channel - dma channel base
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* @name: ascii name of dma channel
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+ * @number: channel id number
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+ * @desc_nbr_max: number of preallocated descriptors
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+ * @priority_high: prio of channel, 0 low otherwise high.
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+ * @param: configuration parameters
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+ * @dev_addr: physical address of periphal connected to channel
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+ */
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+struct coh_dma_channel {
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+ const char name[32];
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+ const int number;
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+ const int desc_nbr_max;
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+ const int priority_high;
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+ const struct coh901318_params param;
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+ const dma_addr_t dev_addr;
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+};
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+
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+/**
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+ * dma_access_memory_state_t - register dma for memory access
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+ *
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+ * @dev: The dma device
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+ * @active: 1 means dma intends to access memory
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+ * 0 means dma wont access memory
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+ */
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+typedef void (*dma_access_memory_state_t)(struct device *dev,
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+ bool active);
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+
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+/**
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+ * struct powersave - DMA power save structure
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+ * @lock: lock protecting data in this struct
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+ * @started_channels: bit mask indicating active dma channels
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+ */
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+struct powersave {
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+ spinlock_t lock;
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+ u64 started_channels;
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+};
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+/**
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+ * struct coh901318_platform - platform arch structure
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+ * @chans_slave: specifying dma slave channels
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+ * @chans_memcpy: specifying dma memcpy channels
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+ * @access_memory_state: requesting DMA memory access (on / off)
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+ * @chan_conf: dma channel configurations
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+ * @max_channels: max number of dma chanenls
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+ */
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+struct coh901318_platform {
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+ const int *chans_slave;
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+ const int *chans_memcpy;
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+ const dma_access_memory_state_t access_memory_state;
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+ const struct coh_dma_channel *chan_conf;
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+ const int max_channels;
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+};
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+
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+#ifdef CONFIG_COH901318
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+/**
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+ * coh901318_filter_id() - DMA channel filter function
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+ * @chan: dma channel handle
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+ * @chan_id: id of dma channel to be filter out
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+ *
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+ * In dma_request_channel() it specifies what channel id to be requested
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+ */
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+bool coh901318_filter_id(struct dma_chan *chan, void *chan_id);
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+#else
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+static inline bool coh901318_filter_id(struct dma_chan *chan, void *chan_id)
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+{
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+ return false;
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+}
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+#endif
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+
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+/*
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+ * DMA Controller - this access the static mappings of the coh901318 dma.
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+ *
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+ */
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+
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+#define COH901318_MOD32_MASK (0x1F)
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+#define COH901318_WORD_MASK (0xFFFFFFFF)
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+/* INT_STATUS - Interrupt Status Registers 32bit (R/-) */
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+#define COH901318_INT_STATUS1 (0x0000)
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+#define COH901318_INT_STATUS2 (0x0004)
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+/* TC_INT_STATUS - Terminal Count Interrupt Status Registers 32bit (R/-) */
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+#define COH901318_TC_INT_STATUS1 (0x0008)
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+#define COH901318_TC_INT_STATUS2 (0x000C)
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+/* TC_INT_CLEAR - Terminal Count Interrupt Clear Registers 32bit (-/W) */
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+#define COH901318_TC_INT_CLEAR1 (0x0010)
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+#define COH901318_TC_INT_CLEAR2 (0x0014)
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+/* RAW_TC_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */
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+#define COH901318_RAW_TC_INT_STATUS1 (0x0018)
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+#define COH901318_RAW_TC_INT_STATUS2 (0x001C)
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+/* BE_INT_STATUS - Bus Error Interrupt Status Registers 32bit (R/-) */
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+#define COH901318_BE_INT_STATUS1 (0x0020)
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+#define COH901318_BE_INT_STATUS2 (0x0024)
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+/* BE_INT_CLEAR - Bus Error Interrupt Clear Registers 32bit (-/W) */
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+#define COH901318_BE_INT_CLEAR1 (0x0028)
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+#define COH901318_BE_INT_CLEAR2 (0x002C)
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+/* RAW_BE_INT_STATUS - Raw Term Count Interrupt Status Registers 32bit (R/-) */
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+#define COH901318_RAW_BE_INT_STATUS1 (0x0030)
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+#define COH901318_RAW_BE_INT_STATUS2 (0x0034)
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+
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+/*
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+ * CX_CFG - Channel Configuration Registers 32bit (R/W)
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+ */
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+#define COH901318_CX_CFG (0x0100)
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+#define COH901318_CX_CFG_SPACING (0x04)
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+/* Channel enable activates tha dma job */
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+#define COH901318_CX_CFG_CH_ENABLE (0x00000001)
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+#define COH901318_CX_CFG_CH_DISABLE (0x00000000)
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+/* Request Mode */
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+#define COH901318_CX_CFG_RM_MASK (0x00000006)
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+#define COH901318_CX_CFG_RM_MEMORY_TO_MEMORY (0x0 << 1)
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+#define COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY (0x1 << 1)
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+#define COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY (0x1 << 1)
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+#define COH901318_CX_CFG_RM_PRIMARY_TO_SECONDARY (0x3 << 1)
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+#define COH901318_CX_CFG_RM_SECONDARY_TO_PRIMARY (0x3 << 1)
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+/* Linked channel request field. RM must == 11 */
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+#define COH901318_CX_CFG_LCRF_SHIFT 3
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+#define COH901318_CX_CFG_LCRF_MASK (0x000001F8)
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+#define COH901318_CX_CFG_LCR_DISABLE (0x00000000)
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+/* Terminal Counter Interrupt Request Mask */
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+#define COH901318_CX_CFG_TC_IRQ_ENABLE (0x00000200)
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+#define COH901318_CX_CFG_TC_IRQ_DISABLE (0x00000000)
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+/* Bus Error interrupt Mask */
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+#define COH901318_CX_CFG_BE_IRQ_ENABLE (0x00000400)
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+#define COH901318_CX_CFG_BE_IRQ_DISABLE (0x00000000)
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+
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+/*
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+ * CX_STAT - Channel Status Registers 32bit (R/-)
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+ */
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+#define COH901318_CX_STAT (0x0200)
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+#define COH901318_CX_STAT_SPACING (0x04)
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+#define COH901318_CX_STAT_RBE_IRQ_IND (0x00000008)
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+#define COH901318_CX_STAT_RTC_IRQ_IND (0x00000004)
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+#define COH901318_CX_STAT_ACTIVE (0x00000002)
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+#define COH901318_CX_STAT_ENABLED (0x00000001)
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+
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+/*
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+ * CX_CTRL - Channel Control Registers 32bit (R/W)
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+ */
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+#define COH901318_CX_CTRL (0x0400)
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+#define COH901318_CX_CTRL_SPACING (0x10)
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+/* Transfer Count Enable */
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+#define COH901318_CX_CTRL_TC_ENABLE (0x00001000)
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+#define COH901318_CX_CTRL_TC_DISABLE (0x00000000)
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+/* Transfer Count Value 0 - 4095 */
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+#define COH901318_CX_CTRL_TC_VALUE_MASK (0x00000FFF)
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+/* Burst count */
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+#define COH901318_CX_CTRL_BURST_COUNT_MASK (0x0000E000)
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+#define COH901318_CX_CTRL_BURST_COUNT_64_BYTES (0x7 << 13)
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+#define COH901318_CX_CTRL_BURST_COUNT_48_BYTES (0x6 << 13)
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+#define COH901318_CX_CTRL_BURST_COUNT_32_BYTES (0x5 << 13)
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+#define COH901318_CX_CTRL_BURST_COUNT_16_BYTES (0x4 << 13)
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+#define COH901318_CX_CTRL_BURST_COUNT_8_BYTES (0x3 << 13)
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+#define COH901318_CX_CTRL_BURST_COUNT_4_BYTES (0x2 << 13)
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+#define COH901318_CX_CTRL_BURST_COUNT_2_BYTES (0x1 << 13)
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