1 files changed, 890 insertions, 0 deletions

diff --git a/drivers/platform/sprd/dma_r4p0.c b/drivers/platform/sprd/dma_r4p0.c
new file mode 100644
index 00000000..fa8f4cdb
--- /dev/null
+++ b/drivers/platform/sprd/dma_r4p0.c
@@ -0,0 +1,890 @@
+/*
+ * Copyright (C) 2012 Spreadtrum Communications Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/semaphore.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/dma-mapping.h>//test
+#include <linux/delay.h>
+
+#include <soc/sprd/sci_glb_regs.h>
+#include <soc/sprd/sci.h>
+#include <soc/sprd/dma_r4p0.h>
+#include <soc/sprd/dma_reg.h>
+
+//#define DMA_DEBUG
+
+struct sci_dma_chn_desc;
+#define AP_DMA_CHN_NUM	32
+#define DMA_CHN_SRC_ADR(base,chn)	(DMA_CHx_BASE(base,chn) + 0x0010)
+#define DMA_CHN_DES_ADR(base,chn)	(DMA_CHx_BASE(base,chn) + 0x0014)
+
+/*depict a dma controller*/
+struct sci_dma_chip {
+	void __iomem *dma_glb_base;
+	spinlock_t chip_lock;
+	/*point to them chns*/
+	struct sci_dma_chn_desc *chn_desc;
+};
+
+struct sci_dma_chn_desc {
+	void __iomem *dma_chn_base;
+	struct sci_dma_chip *dma_chip;
+	spinlock_t chn_lock;
+	const char *dev_name;
+	void (*irq_handler) (int, void *);
+	void *data;
+	u32 dev_id;
+};
+
+#define get_chn_reg_point(dma_chn) \
+	((struct sci_dma_chn_reg *)(dma_chns[(dma_chn)].dma_chn_base))
+
+#define get_dma_chip_point(dma_chn) (dma_chns[dma_chn].dma_chip)
+
+#define SCI_DMA_DEBUG
+
+/*support 5 dma controllers*/
+#define SCI_MAX_DMA_SIZE 5
+#define AP_DMA_INDEX	0
+#define AON_DMA_INDEX	1
+
+static struct sci_dma_chip dma_chips[SCI_MAX_DMA_SIZE];
+static struct sci_dma_chn_desc dma_chns[DMA_CHN_MAX + 1];
+static DEFINE_MUTEX(dma_mutex);
+
+#ifdef DMA_DEBUG
+static int __dma_cfg_check_register(void __iomem * dma_reg_addr)
+{
+	volatile struct sci_dma_chn_reg *dma_reg;
+	dma_reg = (struct sci_dma_chn_reg *)dma_reg_addr;
+
+	printk("DMA register:pause=0x%x,\n req=0x%x,\n cfg=0x%x,\n int=0x%x,\n src_addr=0x%x,\n des_addr=0x%x,\n frg_len=0x%x,\n blk_len=0x%x,\n trsc_len=0x%x,\n trsf_step=0x%x,\n wrap_ptr=0x%x,\n wrap_to=0x%x,\n llist_ptr=0x%x,\n frg_step=0x%x,\n src_blk_step=0x%x,\n des_blk_step=0x%x\n",dma_reg->pause,dma_reg->req,dma_reg->cfg,dma_reg->intc,dma_reg->src_addr,dma_reg->des_addr,dma_reg->frg_len,dma_reg->blk_len,dma_reg->trsc_len,dma_reg->trsf_step,dma_reg->wrap_ptr,dma_reg->wrap_to,dma_reg->llist_ptr,dma_reg->frg_step,dma_reg->src_blk_step,dma_reg->des_blk_step);
+	return 0;
+}
+#endif
+
+static void __inline __ap_dma_clk_enable(void)
+{
+	if (!sci_glb_read((unsigned long)REG_AP_AHB_AHB_EB, BIT_DMA_EB)) {
+		sci_glb_set((unsigned long)REG_AP_AHB_AHB_EB, BIT_DMA_EB);
+	}
+}
+
+static void __inline __ap_dma_clk_disable(void)
+{
+	sci_glb_clr((unsigned long)REG_AP_AHB_AHB_EB, BIT_DMA_EB);
+}
+
+static void __inline __dma_softreset(void)
+{
+	sci_glb_set(REG_AP_AHB_AHB_RST, BIT_DMA_SOFT_RST);
+	udelay(1);
+	sci_glb_clr(REG_AP_AHB_AHB_RST, BIT_DMA_SOFT_RST);
+}
+
+static int __dma_set_int_type(u32 dma_chn, dma_int_type int_type)
+{
+	volatile struct sci_dma_chn_reg *dma_reg = get_chn_reg_point(dma_chn);
+
+	dma_reg->intc &= ~0x1f;
+	dma_reg->intc |= 0x1 << 4;
+	switch (int_type) {
+	case NO_INT:
+		break;
+
+	case FRAG_DONE:
+		dma_reg->intc |= 0x1;
+		break;
+
+	case BLK_DONE:
+		dma_reg->intc |= 0x2;
+		break;
+
+	case TRANS_DONE:
+		dma_reg->intc |= 0x4;
+		break;
+
+	case LIST_DONE:
+		dma_reg->intc |= 0x8;
+		break;
+
+	case CONFIG_ERR:
+		dma_reg->intc |= 0x10;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*convert struct sci_dma_cfg to struct sci_dma_chn_reg*/
+static int __dma_cfg_check_and_convert(u32 dma_chn,
+				       const struct sci_dma_cfg *cfg,
+				       void __iomem * dma_reg_addr)
+{
+	volatile struct sci_dma_chn_reg *dma_reg;
+	u32 datawidth = 0, req_mode = 0, list_end = 0, fix_en = 0;
+	u32 fix_mode = 0, llist_en = 0, wrap_en = 0, wrap_mode = 0;
+
+	/* only full chn support following features:
+	 * 1 transcation tranfer
+	 * 2 linklist
+	 * 3 copy data from fifo to fifo (not test yet, config the
+	 * src_trsf_step = 0 and dst_trsf_step = 0)
+	 * 4 wrap mode
+	 * 5 src_frag_step or dst_frag_step
+	 * 6 src_blk_step or dst_blk_step
+	 */
+	if (cfg->transcation_len ||
+	    cfg->linklist_ptr ||
+	    ((cfg->src_step | cfg->des_step) == 0) ||
+	    (cfg->wrap_ptr && cfg->wrap_to) ||
+	    (cfg->src_frag_step | cfg->dst_frag_step) ||
+	    (cfg->src_blk_step | cfg->dst_blk_step)) {
+		if (dma_chn < FULL_CHN_START) {
+			return -EINVAL;
+		}
+	}
+
+	switch (cfg->datawidth) {
+	case BYTE_WIDTH:
+		datawidth = 0;
+		break;
+	case SHORT_WIDTH:
+		datawidth = 1;
+		break;
+	case WORD_WIDTH:
+		datawidth = 2;
+		break;
+	default:
+		/*linklist config */
+		if (cfg->linklist_ptr)
+			break;
+		printk("DMA config datawidth error!\n");
+		return -EINVAL;
+	}
+
+	/*check step, the step must be Integer multiple of the data width */
+	if (!IS_ALIGNED(cfg->src_step, cfg->datawidth))
+		return -EINVAL;
+
+	if (!IS_ALIGNED(cfg->des_step, cfg->datawidth))
+		return -EINVAL;
+
+	req_mode = cfg->req_mode;
+#if 0
+	/*linklist ptr must aligned with 8 bytes */
+	if (cfg->linklist_ptr) {
+		if (!PTR_ALIGN(cfg->linklist_ptr, 8))
+			return -EINVAL;
+	}
+#endif
+
+	/*addr fix mode */
+	if (cfg->src_step != 0 && cfg->des_step != 0) {
+		fix_en = 0x0;
+	} else {
+		if ((cfg->src_step | cfg->des_step) == 0) {
+			/*only full chn support data copy from fifo to fifo ??? */
+			fix_en = 0x0;
+		} else {
+			fix_en = 0x1;
+			if (cfg->src_step) {
+				/*dest addr is fixed */
+				fix_mode = 0x1;
+			} else {
+				/*src addr is fixed */
+				fix_mode = 0x0;
+			}
+		}
+	}
+
+	/*wrap mode, if wrap_ptr point 0x0, there're some problems, Notices!!! */
+	if (cfg->wrap_ptr && cfg->wrap_to) {
+		wrap_en = 0x1;
+		if (cfg->wrap_to == cfg->src_addr) {
+			wrap_mode = 0x0;
+		} else {
+			if (cfg->wrap_to == cfg->des_addr) {
+				wrap_mode = 0x1;
+			} else {
+				/*error message */
+				return -EINVAL;
+			}
+		}
+	}
+
+	/*Notice!! if the linlklist point 0x0, thers're some porblems */
+	if (cfg->linklist_ptr) {
+		llist_en = 0x1;
+		if (cfg->is_end) {
+			list_end = 0x1;
+		}
+	}
+
+	dma_reg = (struct sci_dma_chn_reg *)dma_reg_addr;
+
+	dma_reg->pause = 0x0;
+	dma_reg->req = 0x0;
+	/*set default priority = 1 */
+	dma_reg->cfg = DMA_PRI_1 << CHN_PRIORITY_OFFSET |
+	    llist_en << LLIST_EN_OFFSET;
+	/*src and des addr */
+	dma_reg->src_addr = cfg->src_addr;
+	dma_reg->des_addr = cfg->des_addr;
+	/*frag len */
+	dma_reg->frg_len =
+	    (datawidth << SRC_DATAWIDTH_OFFSET) |
+	    (datawidth << DES_DATAWIDTH_OFFSET) |
+	    (0x0 << SWT_MODE_OFFSET) |
+	    (req_mode << REQ_MODE_OFFSET) |
+	    (wrap_mode << ADDR_WRAP_SEL_OFFSET) |
+	    (wrap_en << ADDR_WRAP_EN_OFFSET) |
+	    (fix_mode << ADDR_FIX_SEL_OFFSET) |
+	    (fix_en << ADDR_FIX_SEL_EN) |
+	    (list_end << LLIST_END_OFFSET) | (cfg->fragmens_len & FRG_LEN_MASK);
+	/*blk len */
+	dma_reg->blk_len = cfg->block_len & BLK_LEN_MASK;
+
+	if (dma_chn < FULL_CHN_START)
+		return 0;
+
+	/*trac len */
+	if (0x0 == cfg->transcation_len) {
+		dma_reg->trsc_len = cfg->block_len & TRSC_LEN_MASK;
+	} else {
+		dma_reg->trsc_len = cfg->transcation_len & TRSC_LEN_MASK;
+	}
+
+	/*trsf step */
+	dma_reg->trsf_step =
+	    (cfg->des_step & TRSF_STEP_MASK) << DEST_TRSF_STEP_OFFSET |
+	    (cfg->src_step & TRSF_STEP_MASK) << SRC_TRSF_STEP_OFFSET;
+
+	/*wrap ptr */
+	dma_reg->wrap_ptr = cfg->wrap_ptr;
+	dma_reg->wrap_to = cfg->wrap_to;
+
+	dma_reg->llist_ptr = cfg->linklist_ptr;
+	/*frag step */
+	dma_reg->frg_step =
+	    (cfg->dst_frag_step & FRAG_STEP_MASK) << DEST_FRAG_STEP_OFFSET |
+	    (cfg->src_frag_step & FRAG_STEP_MASK) << SRC_FRAG_STEP_OFFSET;
+
+	/*src and dst blk step */
+	dma_reg->src_blk_step = cfg->src_blk_step;
+	dma_reg->des_blk_step = cfg->dst_blk_step;
+
+	return 0;
+}
+
+/*just clean, not disable*/
+static void __inline __dma_int_clr(u32 dma_chn)
+{
+	volatile struct sci_dma_chn_reg *dma_reg = get_chn_reg_point(dma_chn);
+
+	dma_reg->intc |= 0x1f << 24;
+}
+
+static void __inline __dma_int_dis(u32 dma_chn)
+{
+	volatile struct sci_dma_chn_reg *dma_reg = get_chn_reg_point(dma_chn);
+
+	dma_reg->intc |= 0x1f << 24;
+	dma_reg->intc &= ~0x1f;
+}
+
+static irqreturn_t __dma_irq_handle(int irq, void *dev_id)
+{
+	u32 i;
+	u32 logic_dma_chn_offset, dma_chn;
+	u32 irq_status;
+	volatile struct sci_dma_chn_reg *dma_reg;
+	struct sci_dma_chip *dma_chip = (struct sci_dma_chip*)dev_id;
+	volatile struct sci_dma_glb_reg *dma_glb_reg =
+		(struct sci_dma_glb_reg*)dma_chip->dma_glb_base;
+
+	spin_lock(&dma_chip->chip_lock);
+
+	irq_status = dma_glb_reg->int_msk_sts;
+
+	if (unlikely(0 == irq_status)) {
+		spin_unlock(&dma_chip->chip_lock);
+		return IRQ_NONE;
+	}
+
+	/*AP dma,logic_dma_chn_offset = 1 */
+	/*AON dma,logic_dma_chn_offset = 33 */
+	logic_dma_chn_offset = dma_chip->chn_desc - dma_chns;
+
+	while (irq_status) {
+		i = __ffs(irq_status);
+		irq_status &= (irq_status - 1);
+
+		dma_chn = logic_dma_chn_offset + i;
+		
+		dma_reg = get_chn_reg_point(dma_chn);
+		
+		/*need to deal with DMA configuration error interrupt*/
+		dma_reg->intc |= 0x1f << 24;
+
+		if (dma_chns[dma_chn].irq_handler) {
+			/*audio driver need to get the dma chn */
+			dma_chns[dma_chn].irq_handler(dma_chn, dma_chns[dma_chn].data);
+		}
+	}
+
+	spin_unlock(&dma_chip->chip_lock);
+
+	return IRQ_HANDLED;
+}
+
+static void __inline __dma_set_uid(u32 dma_chn, u32 dev_id)
+{
+	struct sci_dma_chip *dma_chip = get_dma_chip_point(dma_chn);
+
+	if (DMA_UID_SOFTWARE != dev_id) {
+		__raw_writel(dma_chn,
+			(volatile void *)DMA_REQ_CID(dma_chip->dma_glb_base, dev_id));
+	}
+}
+
+static void __inline __dma_unset_uid(u32 dma_chn, u32 dev_id)
+{
+	struct sci_dma_chip *dma_chip = get_dma_chip_point(dma_chn);
+
+	if (DMA_UID_SOFTWARE != dev_id) {
+		__raw_writel(0x0,
+			(volatile void *)DMA_REQ_CID(dma_chip->dma_glb_base, dev_id));
+	}
+}
+
+static void __inline __dma_chn_enable(u32 dma_chn)
+{
+	volatile struct sci_dma_chn_reg *dma_reg = get_chn_reg_point(dma_chn);
+
+	dma_reg->cfg |= 0x1;
+}
+
+static void __inline __dma_soft_request(u32 dma_chn)
+{
+	volatile struct sci_dma_chn_reg *dma_reg = get_chn_reg_point(dma_chn);
+
+	dma_reg->req |= 0x1;
+}
+
+static void __dma_stop_and_disable(u32 dma_chn)
+{
+	u32 timeout = 0x2000;
+
+	volatile struct sci_dma_chn_reg *dma_reg = get_chn_reg_point(dma_chn);
+
+	/*if the chn has disable already, do nothing */
+	if (!(dma_reg->cfg & 0x1)) {
+		return;
+	}
+
+	dma_reg->pause |= 0x1;
+
+	/*fixme, need to deal with timeout*/
+	while (!(dma_reg->pause & (0x1 << 16))){
+		timeout--;
+		if(timeout == 0){
+			__dma_softreset();
+			break;
+		}
+	}
+
+	dma_reg->cfg &= ~0x1;
+
+	dma_reg->pause = 0x0;
+}
+
+/*HAL layer function*/
+int sci_dma_start(u32 dma_chn, u32 dev_id)
+{
+	if (dma_chn > DMA_CHN_MAX)
+		return -EINVAL;
+	
+	dma_chns[dma_chn].dev_id = dev_id;
+	/*fixme, need to check dev_id */
+	__dma_set_uid(dma_chn, dev_id);
+
+	__dma_chn_enable(dma_chn);
+
+	if (DMA_UID_SOFTWARE == dev_id)
+		__dma_soft_request(dma_chn);
+
+	return 0;
+}
+
+int sci_dma_stop(u32 dma_chn, u32 dev_id)
+{
+	if (dma_chn > DMA_CHN_MAX)
+		return -EINVAL;
+
+	__dma_stop_and_disable(dma_chn);
+
+	__dma_int_clr(dma_chn);
+
+	return 0;
+}
+
+int sci_dma_register_irqhandle(u32 dma_chn, dma_int_type int_type,
+			       void (*irq_handle) (int, void *), void *data)
+{
+	int ret;
+
+	if (dma_chn > DMA_CHN_MAX)
+		return -EINVAL;
+
+	if (NULL == irq_handle)
+		return -EINVAL;
+
+	ret = __dma_set_int_type(dma_chn, int_type);
+	if (ret < 0)
+		return ret;
+
+	dma_chns[dma_chn].irq_handler = irq_handle;
+	dma_chns[dma_chn].data = data;
+
+	return 0;
+}
+
+int sci_dma_config(u32 dma_chn, struct sci_dma_cfg *cfg_list,
+		   u32 node_size, struct reg_cfg_addr *cfg_addr)
+{
+	int ret, i;
+	struct sci_dma_cfg list_cfg;
+	struct sci_dma_chn_reg *dma_reg_list;
+
+	if (dma_chn > DMA_CHN_MAX)
+		return -EINVAL;
+
+	__ap_dma_clk_enable();
+
+	if (node_size > 1)
+		goto linklist_config;
+
+	ret =
+	    __dma_cfg_check_and_convert(dma_chn, cfg_list,
+			dma_chns[dma_chn].dma_chn_base);
+	if (ret < 0) {
+		printk("%s %d error\n", __func__, __LINE__);
+	}
+
+	return ret;
+
+ linklist_config:
+	if (NULL == cfg_addr)
+		return -EINVAL;
+
+	dma_reg_list = (struct sci_dma_chn_reg *)cfg_addr->virt_addr;
+
+	for (i = 0; i < node_size; i++) {
+		cfg_list[i].linklist_ptr = cfg_addr->phys_addr +
+		    ((i + 1) % node_size) * sizeof(struct sci_dma_chn_reg) + 0x10;
+		ret =
+		    __dma_cfg_check_and_convert(dma_chn, cfg_list + i,
+				dma_reg_list + i);
+		if (ret < 0) {
+			printk("%s %d error\n", __func__, __LINE__);
+			return -EINVAL;
+		}
+	}
+
+	memset((void *)&list_cfg, 0x0, sizeof(list_cfg));
+
+	list_cfg.linklist_ptr = cfg_addr->phys_addr + 0x10;
+	/*audio driver need get src and dest addr in first node */
+	list_cfg.src_addr = cfg_list[0].src_addr;
+	list_cfg.des_addr = cfg_list[0].des_addr;
+
+	ret =
+	    __dma_cfg_check_and_convert(dma_chn, &list_cfg,
+					dma_chns[dma_chn].dma_chn_base);
+
+	return ret;
+}
+
+int sci_dma_request(const char *dev_name, dma_chn_type chn_type)
+{
+	int i;
+	int dma_chn;
+	int dma_chn_start, dma_chn_end;
+
+	if (!dev_name)
+		return -EINVAL;
+
+	dma_chn = -EBUSY;
+
+	switch (chn_type) {
+	case STD_DMA_CHN:
+		dma_chn_start = AP_DMA_CHN_START + STD_CHN_START;
+		dma_chn_end = AP_DMA_CHN_START + STD_CHN_END;
+		break;
+
+	case FULL_DMA_CHN:
+		dma_chn_start = AP_DMA_CHN_START + FULL_CHN_START;
+		dma_chn_end = AP_DMA_CHN_START + FULL_CHN_END;
+		break;
+
+#ifdef AON_DMA_SUPPORT
+	case AON_STD_DMA_CHN:
+		dma_chn_start = AON_DMA_CHN_START + STD_CHN_START;
+		dma_chn_end = AON_DMA_CHN_START + STD_CHN_END;
+		break;
+
+	case AON_FULL_DMA_CHN:
+		dma_chn_start = AON_DMA_CHN_START + FULL_CHN_START;
+		dma_chn_end = AON_DMA_CHN_START + FULL_CHN_END;
+		break;
+#endif
+
+	default:
+		return -EINVAL;
+	}
+
+	mutex_lock(&dma_mutex);
+
+	for (i = dma_chn_start; i <= dma_chn_end; i++) {
+		if (!dma_chns[i].dev_name) {
+			dma_chns[i].dev_name = dev_name;
+			dma_chn = i;
+			break;
+		}
+	}
+
+#ifdef SCI_DMA_DEBUG
+	if (dma_chn >= dma_chn_start) {
+		struct sci_dma_chip *dma_chip;
+		dma_chip = get_dma_chip_point(dma_chn);
+
+		printk("alloc dma chn is %d, and chn reg base is %p,  dma chip base is %p\n",
+			dma_chn, dma_chns[i].dma_chn_base, dma_chip->dma_glb_base);
+	}
+#endif
+	mutex_unlock(&dma_mutex);
+
+	return dma_chn;
+}
+
+int sci_dma_free(u32 dma_chn)
+{
+	int i;
+
+	if (dma_chn > DMA_CHN_MAX)
+		return -EINVAL;
+
+	__dma_stop_and_disable(dma_chn);
+
+	__dma_int_dis(dma_chn);
+
+	/*set a valid dma chn for CID, the CID is start with 1 */
+	__dma_unset_uid(dma_chn, dma_chns[dma_chn].dev_id);
+
+	mutex_lock(&dma_mutex);
+
+	dma_chns[dma_chn].dev_name = NULL;
+	dma_chns[dma_chn].irq_handler = NULL;
+	dma_chns[dma_chn].data = NULL;
+	dma_chns[dma_chn].dev_id = 0;
+
+	/*no need to stop AON dma*/
+	if (dma_chn <= FULL_CHN_END) {
+		/*if all AP chn be free, disbale the dma's clk */
+		for (i = STD_CHN_START; i <= FULL_CHN_END; i++) {
+			if (dma_chns[i].dev_name)
+				break;
+		}
+
+		if (i >= DMA_CHN_MAX) {
+			__dma_softreset();
+			__ap_dma_clk_disable();
+		}
+	}
+
+	mutex_unlock(&dma_mutex);
+
+	return 0;
+}
+
+/*support for audio driver to get current src and dst addr*/
+u32 sci_dma_get_src_addr(u32 dma_chn)
+{
+	unsigned long dma_chn_base;
+	if (dma_chn > DMA_CHN_MAX) {
+		printk("dma chn %d is overflow!\n", dma_chn);
+		return 0;
+	}
+
+	if(dma_chn <= AP_DMA_CHN_NUM)
+		dma_chn_base = (unsigned long)dma_chips[AP_DMA_INDEX].dma_glb_base;
+	else
+		dma_chn_base = (unsigned long)dma_chips[AON_DMA_INDEX].dma_glb_base;
+
+	return __raw_readl((volatile void *)DMA_CHN_SRC_ADR(dma_chn_base,(dma_chn-1)));
+}
+
+u32 sci_dma_get_dst_addr(u32 dma_chn)
+{
+	unsigned long dma_chn_base;
+	if (dma_chn > DMA_CHN_MAX) {
+		printk("dma chn %d is overflow!\n", dma_chn);
+		return 0;
+	}
+	if(dma_chn <= AP_DMA_CHN_NUM)
+		dma_chn_base = (unsigned long)dma_chips[AP_DMA_INDEX].dma_glb_base;
+	else
+		dma_chn_base = (unsigned long)dma_chips[AON_DMA_INDEX].dma_glb_base;
+
+	return __raw_readl((volatile void *)DMA_CHN_DES_ADR(dma_chn_base,(dma_chn-1)));
+}
+
+int sci_dma_dump_reg(u32 dma_chn, u32 *reg_base)
+{
+	unsigned long dma_chn_base;
+	if (dma_chn >= DMA_CHN_MAX) {
+		return -EINVAL;
+	}
+	if(dma_chn <= AP_DMA_CHN_NUM)
+		dma_chn_base = (unsigned long)dma_chips[AP_DMA_INDEX].dma_glb_base;
+	else
+		dma_chn_base = (unsigned long)dma_chips[AON_DMA_INDEX].dma_glb_base;
+	if(reg_base) {
+		*reg_base = DMA_CHx_BASE(dma_chn_base, (dma_chn-1));
+	}
+
+	return  DMA_CHx_OFFSET;
+}
+
+#define DMA_MEMCPY_MIN_SIZE 64
+#define DMA_MEMCPY_MAX_SIZE TRSC_LEN_MASK
+static void sci_dma_memcpy_irqhandle(int chn, void *data)
+{
+	struct semaphore *dma_sema = (struct semaphore *)data;
+
+	up(dma_sema);
+}
+
+int sci_dma_memcpy(u32 dest, u32 src, size_t size)
+{
+	int ret;
+	int dma_chn;
+	u32 data_width, src_step;
+	u32 irq_mode;
+	struct sci_dma_cfg cfg;
+	struct semaphore dma_seam;
+
+	if (size < DMA_MEMCPY_MIN_SIZE || size > DMA_MEMCPY_MAX_SIZE) {
+		return -EINVAL;
+	}
+
+	if (size <= BLK_LEN_MASK) {
+		dma_chn = sci_dma_request("dma memcpy", STD_DMA_CHN);
+	} else {
+		dma_chn = sci_dma_request("dma memcpy", FULL_DMA_CHN);
+	}
+	if (dma_chn < 0) {
+		printk("alloc dma chn fail\n");
+		return dma_chn;
+	}
+
+	sema_init(&dma_seam, 0);
+
+	memset(&cfg, 0x0, sizeof(cfg));
+
+	if ((size & 0x3) == 0) {
+		data_width = WORD_WIDTH;
+		src_step = 4;
+	} else {
+		if ((size & 0x1) == 0) {
+			data_width = SHORT_WIDTH;
+			src_step = 2;
+		} else {
+			data_width = BYTE_WIDTH;
+			src_step = 1;
+		}
+	}
+
+	cfg.src_addr = src;
+	cfg.des_addr = dest;
+	cfg.datawidth = data_width;
+	cfg.src_step = src_step;
+	cfg.des_step = src_step;
+	cfg.fragmens_len = DMA_MEMCPY_MIN_SIZE;
+	if (size <= BLK_LEN_MASK) {
+		cfg.block_len = size;
+		cfg.req_mode = BLOCK_REQ_MODE;
+		irq_mode = BLK_DONE;
+	} else {
+		cfg.block_len = DMA_MEMCPY_MIN_SIZE;
+		cfg.transcation_len = size;
+		cfg.req_mode = TRANS_REQ_MODE;
+		irq_mode = TRANS_DONE;
+	}
+
+	ret = sci_dma_config(dma_chn, &cfg, 1, NULL);
+	if (ret < 0) {
+		printk("dma memcpy config error!\n");
+		sci_dma_free(dma_chn);
+		return -EINVAL;
+	}
+
+	ret = sci_dma_register_irqhandle(dma_chn, irq_mode,
+					 sci_dma_memcpy_irqhandle,
+					 &dma_seam);
+	if (ret < 0) {
+		printk("dma register irqhandle failed!\n");
+		sci_dma_free(dma_chn);
+		return ret;
+	}
+
+	sci_dma_start(dma_chn, DMA_UID_SOFTWARE);
+	down(&dma_seam);
+
+	sci_dma_free(dma_chn);
+
+	return 0;
+}
+
+static int __init sci_init_dma(void)
+{
+	int ret,i;
+	u32 dma_irq;
+	void __iomem *dma_reg_base;
+	struct sci_dma_chip *dma_chip;
+	struct sci_dma_chn_desc *chns_desc;
+	struct device_node *dma_node;
+	dma_node = of_find_compatible_node(NULL, NULL, "sprd,sprd-dma");
+	if (!dma_node) {
+		pr_warn("Can't get the dmac node!\n");
+		return -ENODEV;
+	}
+
+	dma_irq = irq_of_parse_and_map(dma_node, 0);
+	if (dma_irq == 0) {
+		pr_warn("Can't get the dma irq number!\n");
+		return -EIO;
+	}
+	pr_info(" dma irq number is %d!\n", dma_irq);
+	dma_reg_base  = (void __iomem *)SPRD_DMA0_BASE;
+
+#ifdef AON_DMA_SUPPORT
+	u32 aon_dma_irq;
+	void __iomem *aon_dma_reg_base;
+	struct device_node *aon_dma_node;
+	aon_dma_node = of_find_compatible_node(NULL, NULL, "sprd,aon_dma");
+	if (!aon_dma_node) {
+		pr_warn("Can't get the aon dmac node!\n");
+		return -ENODEV;
+	}
+
+	aon_dma_irq = irq_of_parse_and_map(aon_dma_node, 0);
+	if (dma_irq == 0) {
+		pr_warn("Can't get the aon dma irq number!\n");
+		return -EIO;
+	}
+	pr_info(" dma irq number is %d!\n", aon_dma_irq);
+	aon_dma_reg_base = (void __iomem *)REGS_AON_DMA_BASE;
+#endif
+
+	dma_chip = &dma_chips[AP_DMA_INDEX];
+	dma_chip->dma_glb_base = dma_reg_base;
+	spin_lock_init(&dma_chip->chip_lock);
+
+	chns_desc = dma_chns + AP_DMA_CHN_START;
+	for (i = STD_CHN_START; i <= FULL_CHN_END; i++) {
+		chns_desc[i].dma_chip = dma_chip;
+		chns_desc[i].dma_chn_base = DMA_CHx_BASE(dma_reg_base, i);
+		spin_lock_init(&chns_desc[i].chn_lock);
+	}
+
+	dma_chip->chn_desc = chns_desc;
+
+	ret = request_irq(dma_irq, __dma_irq_handle, 0, "sci-dma",
+		(void*)dma_chip);
+	if (ret) {
+		printk(KERN_ERR "request dma irq failed %d\n", ret);
+		return ret;
+	}
+
+#ifdef AON_DMA_SUPPORT
+	dma_chip = &dma_chips[AON_DMA_INDEX];
+	dma_chip->dma_glb_base = aon_dma_reg_base;
+	spin_lock_init(&dma_chip->chip_lock);
+
+	chns_desc = dma_chns  + AON_DMA_CHN_START;
+	for (i = STD_CHN_START; i <= FULL_CHN_END; i++) {
+		chns_desc[i].dma_chip = dma_chip;
+		chns_desc[i].dma_chn_base = DMA_CHx_BASE(aon_dma_reg_base, i);
+		spin_lock_init(&chns_desc[i].chn_lock);
+	}
+
+	dma_chip->chn_desc = chns_desc;
+	ret = request_irq(aon_dma_irq, __dma_irq_handle, 0, "sci-aon-dma",
+		(void*)dma_chip);
+	if (ret) {
+		printk(KERN_ERR "request dma irq failed %d\n", ret);
+		return ret;
+	}
+#endif
+
+	return ret;
+}
+
+#ifdef DMA_DEBUG
+static int __init dma_test(void)
+{
+	sci_dma_memcpy(0x806178d0,0x80000000,256);
+	return 0;
+}
+#endif
+
+int __init dma_new_init(void)
+{
+	int ret;
+	ret = sci_init_dma();
+#ifdef DMA_DEBUG
+	dma_test();
+#endif
+	return ret;
+}
+
+void __exit dma_new_exit(void)
+{
+}
+
+module_init(dma_new_init);
+module_exit(dma_new_exit);
+
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL_GPL(sci_dma_request);
+EXPORT_SYMBOL_GPL(sci_dma_free);
+EXPORT_SYMBOL_GPL(sci_dma_config);
+EXPORT_SYMBOL_GPL(sci_dma_register_irqhandle);
+EXPORT_SYMBOL_GPL(sci_dma_start);
+EXPORT_SYMBOL_GPL(sci_dma_stop);
+EXPORT_SYMBOL_GPL(sci_dma_memcpy);