[PATCH 02/18] dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file
Peter Griffin
peter.griffin at linaro.org
Thu Apr 21 04:04:19 PDT 2016
Signed-off-by: Ludovic Barre <ludovic.barre at st.com>
Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
---
drivers/dma/st_fdma.h | 281 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 281 insertions(+)
create mode 100644 drivers/dma/st_fdma.h
diff --git a/drivers/dma/st_fdma.h b/drivers/dma/st_fdma.h
new file mode 100644
index 0000000..746aee0
--- /dev/null
+++ b/drivers/dma/st_fdma.h
@@ -0,0 +1,281 @@
+/*
+ * st_fdma.h
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ * Author: Ludovic Barre <Ludovic.barre at st.com>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+#ifndef __DMA_ST_FDMA_H
+#define __DMA_ST_FDMA_H
+
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+
+#include "virt-dma.h"
+
+#define ST_FDMA_NR_DREQS 32
+#define EM_SLIM 102 /* No official SLIM ELF ID */
+#define FW_NAME_SIZE 30
+
+enum {
+ CLK_SLIM,
+ CLK_HI,
+ CLK_LOW,
+ CLK_IC,
+ CLK_MAX_NUM,
+};
+
+#define NAME_SZ 10
+
+struct st_fdma_ram {
+ char name[NAME_SZ];
+ u32 offset;
+ u32 size;
+};
+
+/**
+ * struct st_fdma_generic_node - Free running/paced generic node
+ *
+ * @length: Length in bytes of a line in a 2D mem to mem
+ * @sstride: Stride, in bytes, between source lines in a 2D data move
+ * @dstride: Stride, in bytes, between destination lines in a 2D data move
+ */
+struct st_fdma_generic_node {
+ u32 length;
+ u32 sstride;
+ u32 dstride;
+};
+
+/**
+ * struct st_fdma_hw_node - Node structure used by fdma hw
+ *
+ * @next: Pointer to next node
+ * @control: Transfer Control Parameters
+ * @nbytes: Number of Bytes to read
+ * @saddr: Source address
+ * @daddr: Destination address
+ *
+ * @generic: generic node for free running/paced transfert type
+ * 2 others transfert type are possible, but not yet implemented
+ *
+ * The NODE structures must be aligned to a 32 byte boundary
+ */
+struct st_fdma_hw_node {
+ u32 next;
+ u32 control;
+ u32 nbytes;
+ u32 saddr;
+ u32 daddr;
+ union {
+ struct st_fdma_generic_node generic;
+ };
+} __aligned(32);
+
+/*
+ * node control parameters
+ */
+#define NODE_CTRL_REQ_MAP_MASK GENMASK(4, 0)
+#define NODE_CTRL_REQ_MAP_FREE_RUN 0x0
+#define NODE_CTRL_REQ_MAP_DREQ(n) ((n) & NODE_CTRL_REQ_MAP_MASK)
+#define NODE_CTRL_REQ_MAP_EXT NODE_CTRL_REQ_MAP_MASK
+#define NODE_CTRL_SRC_MASK GENMASK(6, 5)
+#define NODE_CTRL_SRC_STATIC BIT(5)
+#define NODE_CTRL_SRC_INCR BIT(6)
+#define NODE_CTRL_DST_MASK GENMASK(8, 7)
+#define NODE_CTRL_DST_STATIC BIT(7)
+#define NODE_CTRL_DST_INCR BIT(8)
+#define NODE_CTRL_SECURE BIT(15)
+#define NODE_CTRL_PAUSE_EON BIT(30)
+#define NODE_CTRL_INT_EON BIT(31)
+
+/**
+ * struct st_fdma_sw_node - descriptor structure for link list
+ *
+ * @pdesc: Physical address of desc
+ * @node: link used for putting this into a channel queue
+ */
+struct st_fdma_sw_node {
+ dma_addr_t pdesc;
+ struct st_fdma_hw_node *desc;
+};
+
+struct st_fdma_driverdata {
+ const struct st_fdma_ram *fdma_mem;
+ u32 num_mem;
+ u32 id;
+ char name[NAME_SZ];
+};
+
+struct st_fdma_desc {
+ struct virt_dma_desc vdesc;
+ struct st_fdma_chan *fchan;
+ bool iscyclic;
+ unsigned int n_nodes;
+ struct st_fdma_sw_node node[];
+};
+
+enum st_fdma_type {
+ ST_FDMA_TYPE_FREE_RUN,
+ ST_FDMA_TYPE_PACED,
+};
+
+struct st_fdma_cfg {
+ struct device_node *of_node;
+ enum st_fdma_type type;
+ dma_addr_t dev_addr;
+ enum dma_transfer_direction dir;
+ int req_line; /* request line */
+ long req_ctrl; /* Request control */
+};
+
+struct st_fdma_chan {
+ struct st_fdma_dev *fdev;
+ struct dma_pool *node_pool;
+ struct dma_slave_config scfg;
+ struct st_fdma_cfg cfg;
+
+ int dreq_line;
+
+ struct virt_dma_chan vchan;
+ struct st_fdma_desc *fdesc;
+ enum dma_status status;
+};
+
+struct st_fdma_dev {
+ struct device *dev;
+ const struct st_fdma_driverdata *drvdata;
+ struct dma_device dma_device;
+
+ void __iomem *io_base;
+ struct resource *io_res;
+ struct clk *clks[CLK_MAX_NUM];
+
+ struct st_fdma_chan *chans;
+
+ spinlock_t dreq_lock;
+ unsigned long dreq_mask;
+
+ u32 nr_channels;
+ char fw_name[FW_NAME_SIZE];
+
+ atomic_t fw_loaded;
+};
+
+/* Registers*/
+/* FDMA interface */
+#define FDMA_ID_OFST 0x00000
+#define FDMA_VER_OFST 0x00004
+
+#define FDMA_EN_OFST 0x00008
+#define FDMA_EN_RUN BIT(0)
+
+#define FDMA_CLK_GATE_OFST 0x0000C
+#define FDMA_CLK_GATE_DIS BIT(0)
+#define FDMA_CLK_GATE_RESET BIT(2)
+
+#define FDMA_SLIM_PC_OFST 0x00020
+
+#define FDMA_REV_ID_OFST 0x10000
+#define FDMA_REV_ID_MIN_MASK GENMASK(15, 8)
+#define FDMA_REV_ID_MIN(id) ((id & FDMA_REV_ID_MIN_MASK) >> 8)
+#define FDMA_REV_ID_MAJ_MASK GENMASK(23, 16)
+#define FDMA_REV_ID_MAJ(id) ((id & FDMA_REV_ID_MAJ_MASK) >> 16)
+
+#define FDMA_STBUS_SYNC_OFST 0x17F88
+#define FDMA_STBUS_SYNC_DIS BIT(0)
+
+#define FDMA_CMD_STA_OFST 0x17FC0
+#define FDMA_CMD_SET_OFST 0x17FC4
+#define FDMA_CMD_CLR_OFST 0x17FC8
+#define FDMA_CMD_MASK_OFST 0x17FCC
+#define FDMA_CMD_START(ch) (0x1 << (ch << 1))
+#define FDMA_CMD_PAUSE(ch) (0x2 << (ch << 1))
+#define FDMA_CMD_FLUSH(ch) (0x3 << (ch << 1))
+
+#define FDMA_INT_STA_OFST 0x17FD0
+#define FDMA_INT_STA_CH 0x1
+#define FDMA_INT_STA_ERR 0x2
+
+#define FDMA_INT_SET_OFST 0x17FD4
+#define FDMA_INT_CLR_OFST 0x17FD8
+#define FDMA_INT_MASK_OFST 0x17FDC
+
+#define fdma_read(fdev, name) \
+ readl_relaxed((fdev)->io_base + FDMA_##name##_OFST)
+
+#define fdma_write(fdev, val, name) \
+ writel_relaxed((val), (fdev)->io_base + FDMA_##name##_OFST)
+
+/* fchan interface */
+#define FDMA_CH_CMD_OFST 0x10200
+#define FDMA_CH_CMD_STA_MASK GENMASK(1, 0)
+#define FDMA_CH_CMD_STA_IDLE (0x0)
+#define FDMA_CH_CMD_STA_START (0x1)
+#define FDMA_CH_CMD_STA_RUNNING (0x2)
+#define FDMA_CH_CMD_STA_PAUSED (0x3)
+#define FDMA_CH_CMD_ERR_MASK GENMASK(4, 2)
+#define FDMA_CH_CMD_ERR_INT (0x0 << 2)
+#define FDMA_CH_CMD_ERR_NAND (0x1 << 2)
+#define FDMA_CH_CMD_ERR_MCHI (0x2 << 2)
+#define FDMA_CH_CMD_DATA_MASK GENMASK(31, 5)
+#define fchan_read(fchan, name) \
+ readl_relaxed((fchan)->fdev->io_base \
+ + (fchan)->vchan.chan.chan_id * 0x4 \
+ + FDMA_##name##_OFST)
+
+#define fchan_write(fchan, val, name) \
+ writel_relaxed((val), (fchan)->fdev->io_base \
+ + (fchan)->vchan.chan.chan_id * 0x4 \
+ + FDMA_##name##_OFST)
+
+/* req interface */
+#define FDMA_REQ_CTRL_OFST 0x10240
+#define dreq_write(fchan, val, name) \
+ writel_relaxed((val), (fchan)->fdev->io_base \
+ + fchan->dreq_line * 0x04 \
+ + FDMA_##name##_OFST)
+/* node interface */
+#define FDMA_NODE_SZ 128
+#define FDMA_PTRN_OFST 0x10800
+#define FDMA_CNTN_OFST 0x10808
+#define FDMA_SADDRN_OFST 0x1080c
+#define FDMA_DADDRN_OFST 0x10810
+#define fnode_read(fchan, name) \
+ readl_relaxed((fchan)->fdev->io_base \
+ + (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+ + FDMA_##name##_OFST)
+
+#define fnode_write(fchan, val, name) \
+ writel_relaxed((val), (fchan)->fdev->io_base \
+ + (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+ + FDMA_##name##_OFST)
+
+/*
+ * request control bits
+ */
+#define REQ_CTRL_NUM_OPS_MASK GENMASK(31, 24)
+#define REQ_CTRL_NUM_OPS(n) (REQ_CTRL_NUM_OPS_MASK & ((n) << 24))
+#define REQ_CTRL_INITIATOR_MASK BIT(22)
+#define REQ_CTRL_INIT0 (0x0 << 22)
+#define REQ_CTRL_INIT1 (0x1 << 22)
+#define REQ_CTRL_INC_ADDR_ON BIT(21)
+#define REQ_CTRL_DATA_SWAP_ON BIT(17)
+#define REQ_CTRL_WNR BIT(14)
+#define REQ_CTRL_OPCODE_MASK GENMASK(7, 4)
+#define REQ_CTRL_OPCODE_LD_ST1 (0x0 << 4)
+#define REQ_CTRL_OPCODE_LD_ST2 (0x1 << 4)
+#define REQ_CTRL_OPCODE_LD_ST4 (0x2 << 4)
+#define REQ_CTRL_OPCODE_LD_ST8 (0x3 << 4)
+#define REQ_CTRL_OPCODE_LD_ST16 (0x4 << 4)
+#define REQ_CTRL_OPCODE_LD_ST32 (0x5 << 4)
+#define REQ_CTRL_OPCODE_LD_ST64 (0x6 << 4)
+#define REQ_CTRL_HOLDOFF_MASK GENMASK(2, 0)
+#define REQ_CTRL_HOLDOFF(n) ((n) & REQ_CTRL_HOLDOFF_MASK)
+
+/* bits used by client to configure request control */
+#define REQ_CTRL_CFG_MASK (REQ_CTRL_HOLDOFF_MASK | REQ_CTRL_DATA_SWAP_ON \
+ | REQ_CTRL_INC_ADDR_ON | REQ_CTRL_INITIATOR_MASK)
+
+bool st_fdma_filter_fn(struct dma_chan *chan, void *param);
+
+#endif /* __DMA_ST_FDMA_H */
--
1.9.1
More information about the linux-arm-kernel
mailing list