dma: mxs-dma: make platform_device_id more generic

Rewrite mxs_dma_is_apbh and mxs_dma_is_apbx in order to support
other SoCs like imx6q and reform the platform_device_id for the
better further dt support.

Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Huang Shijie <b32955@freescale.com>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 79 insertions, 36 deletions

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index c93f9fa08caf..b1cab087cd04 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -36,12 +36,8 @@
  * dma can program the controller registers of peripheral devices.
  */
 
-#define MXS_DMA_APBH            0
-#define MXS_DMA_APBX            1
-#define dma_is_apbh(mxs_dma)    ((mxs_dma)->dev_id == MXS_DMA_APBH)
-
-#define APBH_VERSION_LATEST     3
-#define apbh_is_old(mxs_dma)    ((mxs_dma)->version < APBH_VERSION_LATEST)
+#define dma_is_apbh(mxs_dma)    ((mxs_dma)->type == MXS_DMA_APBH)
+#define apbh_is_old(mxs_dma)    ((mxs_dma)->dev_id == IMX23_DMA)
 
 #define HW_APBHX_CTRL0                          0x000
 #define BM_APBH_CTRL0_APB_BURST8_EN             (1 << 29)
@@ -51,9 +47,6 @@
 #define HW_APBHX_CTRL2                          0x020
 #define HW_APBHX_CHANNEL_CTRL                   0x030
 #define BP_APBHX_CHANNEL_CTRL_RESET_CHANNEL     16
-#define HW_APBH_VERSION                         (cpu_is_mx23() ? 0x3f0 : 0x800)
-#define HW_APBX_VERSION                         0x800
-#define BP_APBHX_VERSION_MAJOR                  24
 /*
  * The offset of NXTCMDAR register is different per both dma type and version,
  * while stride for each channel is all the same 0x70.
@@ -125,9 +118,19 @@ struct mxs_dma_chan {
 #define MXS_DMA_CHANNELS                16
 #define MXS_DMA_CHANNELS_MASK           0xffff
 
+enum mxs_dma_devtype {
+        MXS_DMA_APBH,
+        MXS_DMA_APBX,
+};
+
+enum mxs_dma_id {
+        IMX23_DMA,
+        IMX28_DMA,
+};
+
 struct mxs_dma_engine {
-        int                             dev_id;
-        unsigned int                    version;
+        enum mxs_dma_id                 dev_id;
+        enum mxs_dma_devtype            type;
         void __iomem                    *base;
         struct clk                      *clk;
         struct dma_device               dma_device;
@@ -135,6 +138,66 @@ struct mxs_dma_engine {
         struct mxs_dma_chan             mxs_chans[MXS_DMA_CHANNELS];
 };
 
+struct mxs_dma_type {
+        enum mxs_dma_id id;
+        enum mxs_dma_devtype type;
+};
+
+static struct mxs_dma_type mxs_dma_types[] = {
+        {
+                .id = IMX23_DMA,
+                .type = MXS_DMA_APBH,
+        }, {
+                .id = IMX23_DMA,
+                .type = MXS_DMA_APBX,
+        }, {
+                .id = IMX28_DMA,
+                .type = MXS_DMA_APBH,
+        }, {
+                .id = IMX28_DMA,
+                .type = MXS_DMA_APBX,
+        }
+};
+
+static struct platform_device_id mxs_dma_ids[] = {
+        {
+                .name = "imx23-dma-apbh",
+                .driver_data = (kernel_ulong_t) &mxs_dma_types[0],
+        }, {
+                .name = "imx23-dma-apbx",
+                .driver_data = (kernel_ulong_t) &mxs_dma_types[1],
+        }, {
+                .name = "imx28-dma-apbh",
+                .driver_data = (kernel_ulong_t) &mxs_dma_types[2],
+        }, {
+                .name = "imx28-dma-apbx",
+                .driver_data = (kernel_ulong_t) &mxs_dma_types[3],
+        }, {
+                /* end of list */
+        }
+};
+
+static struct mxs_dma_chan *to_mxs_dma_chan(struct dma_chan *chan)
+{
+        return container_of(chan, struct mxs_dma_chan, chan);
+}
+
+int mxs_dma_is_apbh(struct dma_chan *chan)
+{
+        struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
+        struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
+
+        return dma_is_apbh(mxs_dma);
+}
+
+int mxs_dma_is_apbx(struct dma_chan *chan)
+{
+        struct mxs_dma_chan *mxs_chan = to_mxs_dma_chan(chan);
+        struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
+
+        return !dma_is_apbh(mxs_dma);
+}
+
 static void mxs_dma_reset_chan(struct mxs_dma_chan *mxs_chan)
 {
         struct mxs_dma_engine *mxs_dma = mxs_chan->mxs_dma;
@@ -198,11 +261,6 @@ static void mxs_dma_resume_chan(struct mxs_dma_chan *mxs_chan)
         mxs_chan->status = DMA_IN_PROGRESS;
 }
 
-static struct mxs_dma_chan *to_mxs_dma_chan(struct dma_chan *chan)
-{
-        return container_of(chan, struct mxs_dma_chan, chan);
-}
-
 static dma_cookie_t mxs_dma_tx_submit(struct dma_async_tx_descriptor *tx)
 {
         return dma_cookie_assign(tx);
@@ -575,12 +633,6 @@ static int __init mxs_dma_init(struct mxs_dma_engine *mxs_dma)
         if (ret)
                 goto err_out;
 
-        /* only major version matters */
-        mxs_dma->version = readl(mxs_dma->base +
-                                ((mxs_dma->dev_id == MXS_DMA_APBX) ?
-                                HW_APBX_VERSION : HW_APBH_VERSION)) >>
-                                BP_APBHX_VERSION_MAJOR;
-
         /* enable apbh burst */
         if (dma_is_apbh(mxs_dma)) {
                 writel(BM_APBH_CTRL0_APB_BURST_EN,
@@ -602,6 +654,8 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
 {
         const struct platform_device_id *id_entry =
                                 platform_get_device_id(pdev);
+        const struct mxs_dma_type *dma_type =
+                        (struct mxs_dma_type *)id_entry->driver_data;
         struct mxs_dma_engine *mxs_dma;
         struct resource *iores;
         int ret, i;
@@ -610,7 +664,8 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
         if (!mxs_dma)
                 return -ENOMEM;
 
-        mxs_dma->dev_id = id_entry->driver_data;
+        mxs_dma->dev_id = dma_type->id;
+        mxs_dma->type = dma_type->type;
 
         iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
@@ -693,23 +748,11 @@ err_request_region:
         return ret;
 }
 
-static struct platform_device_id mxs_dma_type[] = {
-        {
-                .name = "mxs-dma-apbh",
-                .driver_data = MXS_DMA_APBH,
-        }, {
-                .name = "mxs-dma-apbx",
-                .driver_data = MXS_DMA_APBX,
-        }, {
-                /* end of list */
-        }
-};
-
 static struct platform_driver mxs_dma_driver = {
         .driver         = {
                 .name   = "mxs-dma",
         },
-        .id_table       = mxs_dma_type,
+        .id_table       = mxs_dma_ids,
 };
 
 static int __init mxs_dma_module_init(void)