diff options
author | Shawn Guo <shawn.guo@linaro.org> | 2012-05-10 02:23:26 +0400 |
---|---|---|
committer | Shawn Guo <shawn.guo@linaro.org> | 2012-05-12 09:32:17 +0400 |
commit | 8c92013643f5c40633d61ae331cef49c1069af10 (patch) | |
tree | 7c385fabafab5ded73621c42639b61e06fa94f6e /drivers/dma/mxs-dma.c | |
parent | bb11fb63fc2e5d1092f17d91790bb4aede6d3ef2 (diff) | |
download | linux-8c92013643f5c40633d61ae331cef49c1069af10.tar.xz |
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>
Diffstat (limited to 'drivers/dma/mxs-dma.c')
-rw-r--r-- | drivers/dma/mxs-dma.c | 115 |
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) |