dmaengine: dw: introduce register mappings for iDMA 32-bit

The integrated DMA (iDMA 32-bit) is Intel designed DMA controller which
mimics Synopsys Designware DMA. This patch appends the register mappings
for the parts which are slightly different to the DesignWare hardware.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h
index ba26d6b..32a3287 100644 (file)
--- a/drivers/dma/dw/regs.h
+++ b/drivers/dma/dw/regs.h
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2005-2007 Atmel Corporation
  * Copyright (C) 2010-2011 ST Microelectronics
+ * Copyright (C) 2016 Intel Corporation
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -13,6 +14,8 @@
 #include <linux/interrupt.h>
 #include <linux/dmaengine.h>
 
+#include <linux/io-64-nonatomic-hi-lo.h>
+
 #include "internal.h"
 
 #define DW_DMA_MAX_NR_REQUESTS 16
@@ -86,9 +89,9 @@ struct dw_dma_regs {
        DW_REG(ID);
        DW_REG(TEST);
 
-       /* reserved */
-       DW_REG(__reserved0);
-       DW_REG(__reserved1);
+       /* iDMA 32-bit support */
+       DW_REG(CLASS_PRIORITY0);
+       DW_REG(CLASS_PRIORITY1);
 
        /* optional encoded params, 0x3c8..0x3f7 */
        u32     __reserved;
@@ -100,6 +103,17 @@ struct dw_dma_regs {
 
        /* top-level parameters */
        u32     DW_PARAMS;
+
+       /* component ID */
+       u32     COMP_TYPE;
+       u32     COMP_VERSION;
+
+       /* iDMA 32-bit support */
+       DW_REG(FIFO_PARTITION0);
+       DW_REG(FIFO_PARTITION1);
+
+       DW_REG(SAI_ERR);
+       DW_REG(GLOBAL_CFG);
 };
 
 /*
@@ -216,6 +230,33 @@ enum dw_dma_msize {
 /* Bitfields in CFG */
 #define DW_CFG_DMA_EN          (1 << 0)
 
+/* iDMA 32-bit support */
+
+/* Bitfields in CTL_HI */
+#define IDMA32C_CTLH_BLOCK_TS_MASK     GENMASK(16, 0)
+#define IDMA32C_CTLH_BLOCK_TS(x)       ((x) & IDMA32C_CTLH_BLOCK_TS_MASK)
+#define IDMA32C_CTLH_DONE              (1 << 17)
+
+/* Bitfields in CFG_LO */
+#define IDMA32C_CFGL_DST_BURST_ALIGN   (1 << 0)        /* dst burst align */
+#define IDMA32C_CFGL_SRC_BURST_ALIGN   (1 << 1)        /* src burst align */
+#define IDMA32C_CFGL_CH_DRAIN          (1 << 10)       /* drain FIFO */
+#define IDMA32C_CFGL_DST_OPT_BL                (1 << 20)       /* optimize dst burst length */
+#define IDMA32C_CFGL_SRC_OPT_BL                (1 << 21)       /* optimize src burst length */
+
+/* Bitfields in CFG_HI */
+#define IDMA32C_CFGH_SRC_PER(x)                ((x) << 0)
+#define IDMA32C_CFGH_DST_PER(x)                ((x) << 4)
+#define IDMA32C_CFGH_RD_ISSUE_THD(x)   ((x) << 8)
+#define IDMA32C_CFGH_RW_ISSUE_THD(x)   ((x) << 18)
+#define IDMA32C_CFGH_SRC_PER_EXT(x)    ((x) << 28)     /* src peripheral extension */
+#define IDMA32C_CFGH_DST_PER_EXT(x)    ((x) << 30)     /* dst peripheral extension */
+
+/* Bitfields in FIFO_PARTITION */
+#define IDMA32C_FP_PSIZE_CH0(x)                ((x) << 0)
+#define IDMA32C_FP_PSIZE_CH1(x)                ((x) << 13)
+#define IDMA32C_FP_UPDATE              (1 << 26)
+
 enum dw_dmac_flags {
        DW_DMA_IS_CYCLIC = 0,
        DW_DMA_IS_SOFT_LLP = 1,
@@ -296,6 +337,11 @@ static inline struct dw_dma_regs __iomem *__dw_regs(struct dw_dma *dw)
 #define dma_writel(dw, name, val) \
        dma_writel_native((val), &(__dw_regs(dw)->name))
 
+#define idma32_readq(dw, name)                         \
+       hi_lo_readq(&(__dw_regs(dw)->name))
+#define idma32_writeq(dw, name, val)                   \
+       hi_lo_writeq((val), &(__dw_regs(dw)->name))
+
 #define channel_set_bit(dw, reg, mask) \
        dma_writel(dw, reg, ((mask) << 8) | (mask))
 #define channel_clear_bit(dw, reg, mask) \