Do not use the legacy and deprecated omap-dma interface for setting up the memcpy.
Signed-off-by: Peter Ujfalusi <peter.ujfal...@ti.com> --- Hi, this patch depends on the dma setup simplification patch: https://www.mail-archive.com/linux-omap@vger.kernel.org/msg122375.html We could try to enable the DMA memcpy without condition I believe, but I have decided to not do it since the code had comments regarding to PM (?) when using DMA. Regards, Peter drivers/mtd/onenand/omap2.c | 84 ++++++++++++++++++++++----------------------- 1 file changed, 41 insertions(+), 43 deletions(-) diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c index 58576c9babb0..b747217d5e73 100644 --- a/drivers/mtd/onenand/omap2.c +++ b/drivers/mtd/onenand/omap2.c @@ -32,6 +32,7 @@ #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/dma-mapping.h> +#include <linux/dmaengine.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/regulator/consumer.h> @@ -40,8 +41,6 @@ #include <linux/platform_data/mtd-onenand-omap2.h> #include <asm/gpio.h> -#include <linux/omap-dma.h> - #define DRIVER_NAME "omap2-onenand" #define ONENAND_BUFRAM_SIZE (1024 * 5) @@ -56,18 +55,16 @@ struct omap2_onenand { struct onenand_chip onenand; struct completion irq_done; struct completion dma_done; - int dma_channel; + struct dma_chan *dma_chan; int freq; int (*setup)(void __iomem *base, int *freq_ptr); struct regulator *regulator; u8 flags; }; -static void omap2_onenand_dma_cb(int lch, u16 ch_status, void *data) +static void omap2_onenand_dma_complete_func(void *completion) { - struct omap2_onenand *c = data; - - complete(&c->dma_done); + complete(completion); } static irqreturn_t omap2_onenand_interrupt(int irq, void *dev_id) @@ -295,23 +292,33 @@ static inline int omap2_onenand_dma_transfer(struct omap2_onenand *c, dma_addr_t src, dma_addr_t dst, size_t count) { - int data_type = __ffs((src | dst | count)); + struct dma_device *dma_dev = c->dma_chan->device; + struct dma_async_tx_descriptor *tx = NULL; + dma_cookie_t cookie; - if (data_type > OMAP_DMA_DATA_TYPE_S32) - data_type = OMAP_DMA_DATA_TYPE_S32; - - omap_set_dma_transfer_params(c->dma_channel, OMAP_DMA_DATA_TYPE_S32, - count / BIT(data_type), 1, 0, 0, 0); - omap_set_dma_src_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC, - src, 0, 0); - omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC, - dst, 0, 0); + tx = dma_dev->device_prep_dma_memcpy(c->dma_chan, dst, src, count, 0); + if (!tx) { + dev_err(&c->pdev->dev, "Failed to prepare DMA memcpy\n"); + return -EIO; + } reinit_completion(&c->dma_done); - omap_start_dma(c->dma_channel); + tx->callback = omap2_onenand_dma_complete_func; + tx->callback_param = &c->dma_done; + + cookie = tx->tx_submit(tx); + if (dma_submit_error(cookie)) { + dev_err(&c->pdev->dev, "Failed to do DMA tx_submit\n"); + return -EIO; + } + + dma_async_issue_pending(c->dma_chan); + if (wait_for_completion_timeout(&c->dma_done, msecs_to_jiffies(20))) return -ETIMEDOUT; + dmaengine_terminate_all(c->dma_chan); + return 0; } @@ -465,7 +472,7 @@ static int omap2_onenand_read_bufferram(struct mtd_info *mtd, int area, bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset; /* DMA is not used. Revisit PM requirements before enabling it. */ - if (1 || (c->dma_channel < 0) || + if (1 || !c->dma_chan || ((void *) buffer >= (void *) high_memory) || (bram_offset & 3) || (((unsigned int) buffer) & 3) || (count < 1024) || (count & 3)) { memcpy(buffer, (__force void *)(this->base + bram_offset), @@ -503,7 +510,7 @@ static int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area, bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset; /* DMA is not used. Revisit PM requirements before enabling it. */ - if (1 || (c->dma_channel < 0) || + if (1 || !c->dma_chan || ((void *) buffer >= (void *) high_memory) || (bram_offset & 3) || (((unsigned int) buffer) & 3) || (count < 1024) || (count & 3)) { memcpy((__force void *)(this->base + bram_offset), buffer, @@ -608,8 +615,7 @@ static int omap2_onenand_probe(struct platform_device *pdev) c->flags = pdata->flags; c->gpmc_cs = pdata->cs; c->gpio_irq = pdata->gpio_irq; - c->dma_channel = pdata->dma_channel; - if (c->dma_channel < 0) { + if (pdata->dma_channel < 0) { /* if -1, don't use DMA */ c->gpio_irq = 0; } @@ -661,25 +667,17 @@ static int omap2_onenand_probe(struct platform_device *pdev) goto err_release_gpio; } - if (c->dma_channel >= 0) { - r = omap_request_dma(0, pdev->dev.driver->name, - omap2_onenand_dma_cb, (void *) c, - &c->dma_channel); - if (r == 0) { - omap_set_dma_write_mode(c->dma_channel, - OMAP_DMA_WRITE_NON_POSTED); - omap_set_dma_src_data_pack(c->dma_channel, 1); - omap_set_dma_src_burst_mode(c->dma_channel, - OMAP_DMA_DATA_BURST_8); - omap_set_dma_dest_data_pack(c->dma_channel, 1); - omap_set_dma_dest_burst_mode(c->dma_channel, - OMAP_DMA_DATA_BURST_8); - } else { + if (pdata->dma_channel >= 0) { + dma_cap_mask_t mask; + + dma_cap_zero(mask); + dma_cap_set(DMA_MEMCPY, mask); + + c->dma_chan = dma_request_channel(mask, NULL, NULL); + if (!c->dma_chan) dev_info(&pdev->dev, "failed to allocate DMA for OneNAND, " "using PIO instead\n"); - c->dma_channel = -1; - } } dev_info(&pdev->dev, "initializing on CS%d, phys base 0x%08lx, virtual " @@ -693,7 +691,7 @@ static int omap2_onenand_probe(struct platform_device *pdev) mtd_set_of_node(&c->mtd, pdata->of_node); this = &c->onenand; - if (c->dma_channel >= 0) { + if (c->dma_chan) { this->wait = omap2_onenand_wait; if (c->flags & ONENAND_IN_OMAP34XX) { this->read_bufferram = omap3_onenand_read_bufferram; @@ -735,8 +733,8 @@ err_release_onenand: err_release_regulator: regulator_put(c->regulator); err_release_dma: - if (c->dma_channel != -1) - omap_free_dma(c->dma_channel); + if (c->dma_chan) + dma_release_channel(c->dma_chan); if (c->gpio_irq) free_irq(gpio_to_irq(c->gpio_irq), c); err_release_gpio: @@ -758,8 +756,8 @@ static int omap2_onenand_remove(struct platform_device *pdev) onenand_release(&c->mtd); regulator_put(c->regulator); - if (c->dma_channel != -1) - omap_free_dma(c->dma_channel); + if (c->dma_chan) + dma_release_channel(c->dma_chan); omap2_onenand_shutdown(pdev); if (c->gpio_irq) { free_irq(gpio_to_irq(c->gpio_irq), c); -- 2.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
