diff options
author | Javier Martin <javier.martin@vista-silicon.com> | 2012-03-22 14:54:12 +0100 |
---|---|---|
committer | Vinod Koul <vinod.koul@linux.intel.com> | 2012-03-26 11:31:32 +0530 |
commit | cd5cf9da020293118800864641e09b71e23ba41c (patch) | |
tree | c26fe39e278a0df1b7ac74476be85f34596dceb1 /drivers/dma | |
parent | a6cbb2d87d20817e555a6ffa3131bfa1cdd9ab73 (diff) | |
download | linux-cd5cf9da020293118800864641e09b71e23ba41c.tar.bz2 |
dmaengine: imx-dma: remove 'imx_dmav1_baseaddr' and 'dma_clk'.
These global variables are integrated into the dmaengine structure.
Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r-- | drivers/dma/imx-dma.c | 169 |
1 files changed, 93 insertions, 76 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c index 628b0f61ab38..cdca95a5666c 100644 --- a/drivers/dma/imx-dma.c +++ b/drivers/dma/imx-dma.c @@ -160,6 +160,8 @@ struct imxdma_engine { struct device *dev; struct device_dma_parameters dma_parms; struct dma_device dma_device; + void __iomem *base; + struct clk *dma_clk; struct imxdma_channel channel[IMX_DMA_CHANNELS]; }; @@ -181,18 +183,17 @@ static inline bool imxdma_chan_is_doing_cyclic(struct imxdma_channel *imxdmac) return false; } -/* TODO: put this inside any struct */ -static void __iomem *imx_dmav1_baseaddr; -static struct clk *dma_clk; -static void imx_dmav1_writel(unsigned val, unsigned offset) + +static void imx_dmav1_writel(struct imxdma_engine *imxdma, unsigned val, + unsigned offset) { - __raw_writel(val, imx_dmav1_baseaddr + offset); + __raw_writel(val, imxdma->base + offset); } -static unsigned imx_dmav1_readl(unsigned offset) +static unsigned imx_dmav1_readl(struct imxdma_engine *imxdma, unsigned offset) { - return __raw_readl(imx_dmav1_baseaddr + offset); + return __raw_readl(imxdma->base + offset); } static int imxdma_hw_chain(struct imxdma_channel *imxdmac) @@ -209,6 +210,7 @@ static int imxdma_hw_chain(struct imxdma_channel *imxdmac) static inline int imxdma_sg_next(struct imxdma_desc *d) { struct imxdma_channel *imxdmac = to_imxdma_chan(d->desc.chan); + struct imxdma_engine *imxdma = imxdmac->imxdma; struct scatterlist *sg = d->sg; unsigned long now; @@ -217,17 +219,19 @@ static inline int imxdma_sg_next(struct imxdma_desc *d) d->len -= now; if (d->direction == DMA_DEV_TO_MEM) - imx_dmav1_writel(sg->dma_address, DMA_DAR(imxdmac->channel)); + imx_dmav1_writel(imxdma, sg->dma_address, + DMA_DAR(imxdmac->channel)); else - imx_dmav1_writel(sg->dma_address, DMA_SAR(imxdmac->channel)); + imx_dmav1_writel(imxdma, sg->dma_address, + DMA_SAR(imxdmac->channel)); - imx_dmav1_writel(now, DMA_CNTR(imxdmac->channel)); + imx_dmav1_writel(imxdma, now, DMA_CNTR(imxdmac->channel)); pr_debug("imxdma%d: next sg chunk dst 0x%08x, src 0x%08x, " "size 0x%08x\n", imxdmac->channel, - imx_dmav1_readl(DMA_DAR(imxdmac->channel)), - imx_dmav1_readl(DMA_SAR(imxdmac->channel)), - imx_dmav1_readl(DMA_CNTR(imxdmac->channel))); + imx_dmav1_readl(imxdma, DMA_DAR(imxdmac->channel)), + imx_dmav1_readl(imxdma, DMA_SAR(imxdmac->channel)), + imx_dmav1_readl(imxdma, DMA_CNTR(imxdmac->channel))); return now; } @@ -235,6 +239,7 @@ static inline int imxdma_sg_next(struct imxdma_desc *d) static void imxdma_enable_hw(struct imxdma_desc *d) { struct imxdma_channel *imxdmac = to_imxdma_chan(d->desc.chan); + struct imxdma_engine *imxdma = imxdmac->imxdma; int channel = imxdmac->channel; unsigned long flags; @@ -242,10 +247,11 @@ static void imxdma_enable_hw(struct imxdma_desc *d) local_irq_save(flags); - imx_dmav1_writel(1 << channel, DMA_DISR); - imx_dmav1_writel(imx_dmav1_readl(DMA_DIMR) & ~(1 << channel), DMA_DIMR); - imx_dmav1_writel(imx_dmav1_readl(DMA_CCR(channel)) | CCR_CEN | - CCR_ACRPT, DMA_CCR(channel)); + imx_dmav1_writel(imxdma, 1 << channel, DMA_DISR); + imx_dmav1_writel(imxdma, imx_dmav1_readl(imxdma, DMA_DIMR) & + ~(1 << channel), DMA_DIMR); + imx_dmav1_writel(imxdma, imx_dmav1_readl(imxdma, DMA_CCR(channel)) | + CCR_CEN | CCR_ACRPT, DMA_CCR(channel)); if ((cpu_is_mx21() || cpu_is_mx27()) && d->sg && imxdma_hw_chain(imxdmac)) { @@ -253,9 +259,9 @@ static void imxdma_enable_hw(struct imxdma_desc *d) if (d->sg) { u32 tmp; imxdma_sg_next(d); - tmp = imx_dmav1_readl(DMA_CCR(channel)); - imx_dmav1_writel(tmp | CCR_RPT | CCR_ACRPT, - DMA_CCR(channel)); + tmp = imx_dmav1_readl(imxdma, DMA_CCR(channel)); + imx_dmav1_writel(imxdma, tmp | CCR_RPT | CCR_ACRPT, + DMA_CCR(channel)); } } @@ -264,6 +270,7 @@ static void imxdma_enable_hw(struct imxdma_desc *d) static void imxdma_disable_hw(struct imxdma_channel *imxdmac) { + struct imxdma_engine *imxdma = imxdmac->imxdma; int channel = imxdmac->channel; unsigned long flags; @@ -273,19 +280,21 @@ static void imxdma_disable_hw(struct imxdma_channel *imxdmac) del_timer(&imxdmac->watchdog); local_irq_save(flags); - imx_dmav1_writel(imx_dmav1_readl(DMA_DIMR) | (1 << channel), DMA_DIMR); - imx_dmav1_writel(imx_dmav1_readl(DMA_CCR(channel)) & ~CCR_CEN, - DMA_CCR(channel)); - imx_dmav1_writel(1 << channel, DMA_DISR); + imx_dmav1_writel(imxdma, imx_dmav1_readl(imxdma, DMA_DIMR) | + (1 << channel), DMA_DIMR); + imx_dmav1_writel(imxdma, imx_dmav1_readl(imxdma, DMA_CCR(channel)) & + ~CCR_CEN, DMA_CCR(channel)); + imx_dmav1_writel(imxdma, 1 << channel, DMA_DISR); local_irq_restore(flags); } static void imxdma_watchdog(unsigned long data) { struct imxdma_channel *imxdmac = (struct imxdma_channel *)data; + struct imxdma_engine *imxdma = imxdmac->imxdma; int channel = imxdmac->channel; - imx_dmav1_writel(0, DMA_CCR(channel)); + imx_dmav1_writel(imxdma, 0, DMA_CCR(channel)); /* Tasklet watchdog error handler */ tasklet_schedule(&imxdmac->dma_tasklet); @@ -299,37 +308,37 @@ static irqreturn_t imxdma_err_handler(int irq, void *dev_id) int i, disr; int errcode; - disr = imx_dmav1_readl(DMA_DISR); + disr = imx_dmav1_readl(imxdma, DMA_DISR); - err_mask = imx_dmav1_readl(DMA_DBTOSR) | - imx_dmav1_readl(DMA_DRTOSR) | - imx_dmav1_readl(DMA_DSESR) | - imx_dmav1_readl(DMA_DBOSR); + err_mask = imx_dmav1_readl(imxdma, DMA_DBTOSR) | + imx_dmav1_readl(imxdma, DMA_DRTOSR) | + imx_dmav1_readl(imxdma, DMA_DSESR) | + imx_dmav1_readl(imxdma, DMA_DBOSR); if (!err_mask) return IRQ_HANDLED; - imx_dmav1_writel(disr & err_mask, DMA_DISR); + imx_dmav1_writel(imxdma, disr & err_mask, DMA_DISR); for (i = 0; i < IMX_DMA_CHANNELS; i++) { if (!(err_mask & (1 << i))) continue; errcode = 0; - if (imx_dmav1_readl(DMA_DBTOSR) & (1 << i)) { - imx_dmav1_writel(1 << i, DMA_DBTOSR); + if (imx_dmav1_readl(imxdma, DMA_DBTOSR) & (1 << i)) { + imx_dmav1_writel(imxdma, 1 << i, DMA_DBTOSR); errcode |= IMX_DMA_ERR_BURST; } - if (imx_dmav1_readl(DMA_DRTOSR) & (1 << i)) { - imx_dmav1_writel(1 << i, DMA_DRTOSR); + if (imx_dmav1_readl(imxdma, DMA_DRTOSR) & (1 << i)) { + imx_dmav1_writel(imxdma, 1 << i, DMA_DRTOSR); errcode |= IMX_DMA_ERR_REQUEST; } - if (imx_dmav1_readl(DMA_DSESR) & (1 << i)) { - imx_dmav1_writel(1 << i, DMA_DSESR); + if (imx_dmav1_readl(imxdma, DMA_DSESR) & (1 << i)) { + imx_dmav1_writel(imxdma, 1 << i, DMA_DSESR); errcode |= IMX_DMA_ERR_TRANSFER; } - if (imx_dmav1_readl(DMA_DBOSR) & (1 << i)) { - imx_dmav1_writel(1 << i, DMA_DBOSR); + if (imx_dmav1_readl(imxdma, DMA_DBOSR) & (1 << i)) { + imx_dmav1_writel(imxdma, 1 << i, DMA_DBOSR); errcode |= IMX_DMA_ERR_BUFFER; } /* Tasklet error handler */ @@ -347,6 +356,7 @@ static irqreturn_t imxdma_err_handler(int irq, void *dev_id) static void dma_irq_handle_channel(struct imxdma_channel *imxdmac) { + struct imxdma_engine *imxdma = imxdmac->imxdma; int chno = imxdmac->channel; struct imxdma_desc *desc; @@ -368,7 +378,7 @@ static void dma_irq_handle_channel(struct imxdma_channel *imxdmac) if (desc->sg) { imxdma_sg_next(desc); - tmp = imx_dmav1_readl(DMA_CCR(chno)); + tmp = imx_dmav1_readl(imxdma, DMA_CCR(chno)); if (imxdma_hw_chain(imxdmac)) { /* FIXME: The timeout should probably be @@ -378,13 +388,14 @@ static void dma_irq_handle_channel(struct imxdma_channel *imxdmac) jiffies + msecs_to_jiffies(500)); tmp |= CCR_CEN | CCR_RPT | CCR_ACRPT; - imx_dmav1_writel(tmp, DMA_CCR(chno)); + imx_dmav1_writel(imxdma, tmp, DMA_CCR(chno)); } else { - imx_dmav1_writel(tmp & ~CCR_CEN, DMA_CCR(chno)); + imx_dmav1_writel(imxdma, tmp & ~CCR_CEN, + DMA_CCR(chno)); tmp |= CCR_CEN; } - imx_dmav1_writel(tmp, DMA_CCR(chno)); + imx_dmav1_writel(imxdma, tmp, DMA_CCR(chno)); if (imxdma_chan_is_doing_cyclic(imxdmac)) /* Tasklet progression */ @@ -400,7 +411,7 @@ static void dma_irq_handle_channel(struct imxdma_channel *imxdmac) } out: - imx_dmav1_writel(0, DMA_CCR(chno)); + imx_dmav1_writel(imxdma, 0, DMA_CCR(chno)); /* Tasklet irq */ tasklet_schedule(&imxdmac->dma_tasklet); } @@ -413,12 +424,12 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) if (cpu_is_mx21() || cpu_is_mx27()) imxdma_err_handler(irq, dev_id); - disr = imx_dmav1_readl(DMA_DISR); + disr = imx_dmav1_readl(imxdma, DMA_DISR); pr_debug("imxdma: dma_irq_handler called, disr=0x%08x\n", disr); - imx_dmav1_writel(disr, DMA_DISR); + imx_dmav1_writel(imxdma, disr, DMA_DISR); for (i = 0; i < IMX_DMA_CHANNELS; i++) { if (disr & (1 << i)) dma_irq_handle_channel(&imxdma->channel[i]); @@ -435,12 +446,12 @@ static int imxdma_xfer_desc(struct imxdma_desc *d) /* Configure and enable */ switch (d->type) { case IMXDMA_DESC_MEMCPY: - imx_dmav1_writel(d->src, DMA_SAR(imxdmac->channel)); - imx_dmav1_writel(d->dest, DMA_DAR(imxdmac->channel)); - imx_dmav1_writel(d->config_mem | (d->config_port << 2), + imx_dmav1_writel(imxdma, d->src, DMA_SAR(imxdmac->channel)); + imx_dmav1_writel(imxdma, d->dest, DMA_DAR(imxdmac->channel)); + imx_dmav1_writel(imxdma, d->config_mem | (d->config_port << 2), DMA_CCR(imxdmac->channel)); - imx_dmav1_writel(d->len, DMA_CNTR(imxdmac->channel)); + imx_dmav1_writel(imxdma, d->len, DMA_CNTR(imxdmac->channel)); dev_dbg(imxdma->dev, "%s channel: %d dest=0x%08x src=0x%08x " "dma_length=%d\n", __func__, imxdmac->channel, @@ -451,9 +462,9 @@ static int imxdma_xfer_desc(struct imxdma_desc *d) case IMXDMA_DESC_CYCLIC: case IMXDMA_DESC_SLAVE_SG: if (d->direction == DMA_DEV_TO_MEM) { - imx_dmav1_writel(imxdmac->per_address, + imx_dmav1_writel(imxdma, imxdmac->per_address, DMA_SAR(imxdmac->channel)); - imx_dmav1_writel(imxdmac->ccr_from_device, + imx_dmav1_writel(imxdma, imxdmac->ccr_from_device, DMA_CCR(imxdmac->channel)); dev_dbg(imxdma->dev, "%s channel: %d sg=%p sgcount=%d " @@ -461,9 +472,9 @@ static int imxdma_xfer_desc(struct imxdma_desc *d) __func__, imxdmac->channel, d->sg, d->sgcount, d->len, imxdmac->per_address); } else if (d->direction == DMA_MEM_TO_DEV) { - imx_dmav1_writel(imxdmac->per_address, + imx_dmav1_writel(imxdma, imxdmac->per_address, DMA_DAR(imxdmac->channel)); - imx_dmav1_writel(imxdmac->ccr_to_device, + imx_dmav1_writel(imxdma, imxdmac->ccr_to_device, DMA_CCR(imxdmac->channel)); dev_dbg(imxdma->dev, "%s channel: %d sg=%p sgcount=%d " @@ -528,6 +539,7 @@ static int imxdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, { struct imxdma_channel *imxdmac = to_imxdma_chan(chan); struct dma_slave_config *dmaengine_cfg = (void *)arg; + struct imxdma_engine *imxdma = imxdmac->imxdma; unsigned long flags; unsigned int mode = 0; @@ -573,12 +585,12 @@ static int imxdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, imxdmac->ccr_to_device = (IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR) | ((mode | IMX_DMA_TYPE_FIFO) << 2) | CCR_REN; - imx_dmav1_writel(imxdmac->dma_request, + imx_dmav1_writel(imxdma, imxdmac->dma_request, DMA_RSSR(imxdmac->channel)); /* Set burst length */ - imx_dmav1_writel(imxdmac->watermark_level * imxdmac->word_size, - DMA_BLR(imxdmac->channel)); + imx_dmav1_writel(imxdma, imxdmac->watermark_level * + imxdmac->word_size, DMA_BLR(imxdmac->channel)); return 0; default: @@ -836,27 +848,35 @@ static int __init imxdma_probe(struct platform_device *pdev) struct imxdma_engine *imxdma; int ret, i; - if (cpu_is_mx1()) - imx_dmav1_baseaddr = MX1_IO_ADDRESS(MX1_DMA_BASE_ADDR); - else if (cpu_is_mx21()) - imx_dmav1_baseaddr = MX21_IO_ADDRESS(MX21_DMA_BASE_ADDR); - else if (cpu_is_mx27()) - imx_dmav1_baseaddr = MX27_IO_ADDRESS(MX27_DMA_BASE_ADDR); - else + + imxdma = kzalloc(sizeof(*imxdma), GFP_KERNEL); + if (!imxdma) + return -ENOMEM; + + if (cpu_is_mx1()) { + imxdma->base = MX1_IO_ADDRESS(MX1_DMA_BASE_ADDR); + } else if (cpu_is_mx21()) { + imxdma->base = MX21_IO_ADDRESS(MX21_DMA_BASE_ADDR); + } else if (cpu_is_mx27()) { + imxdma->base = MX27_IO_ADDRESS(MX27_DMA_BASE_ADDR); + } else { + kfree(imxdma); return 0; + } - dma_clk = clk_get(NULL, "dma"); - if (IS_ERR(dma_clk)) - return PTR_ERR(dma_clk); - clk_enable(dma_clk); + imxdma->dma_clk = clk_get(NULL, "dma"); + if (IS_ERR(imxdma->dma_clk)) + return PTR_ERR(imxdma->dma_clk); + clk_enable(imxdma->dma_clk); /* reset DMA module */ - imx_dmav1_writel(DCR_DRST, DMA_DCR); + imx_dmav1_writel(imxdma, DCR_DRST, DMA_DCR); if (cpu_is_mx1()) { ret = request_irq(MX1_DMA_INT, dma_irq_handler, 0, "DMA", imxdma); if (ret) { pr_crit("Can't register IRQ for DMA\n"); + kfree(imxdma); return ret; } @@ -864,22 +884,19 @@ static int __init imxdma_probe(struct platform_device *pdev) if (ret) { pr_crit("Can't register ERRIRQ for DMA\n"); free_irq(MX1_DMA_INT, NULL); + kfree(imxdma); return ret; } } /* enable DMA module */ - imx_dmav1_writel(DCR_DEN, DMA_DCR); + imx_dmav1_writel(imxdma, DCR_DEN, DMA_DCR); /* clear all interrupts */ - imx_dmav1_writel((1 << IMX_DMA_CHANNELS) - 1, DMA_DISR); + imx_dmav1_writel(imxdma, (1 << IMX_DMA_CHANNELS) - 1, DMA_DISR); /* disable interrupts */ - imx_dmav1_writel((1 << IMX_DMA_CHANNELS) - 1, DMA_DIMR); - - imxdma = kzalloc(sizeof(*imxdma), GFP_KERNEL); - if (!imxdma) - return -ENOMEM; + imx_dmav1_writel(imxdma, (1 << IMX_DMA_CHANNELS) - 1, DMA_DIMR); INIT_LIST_HEAD(&imxdma->dma_device.channels); |