diff options
| -rw-r--r-- | drivers/mtd/onenand/omap2.c | 80 |
1 files changed, 38 insertions, 42 deletions
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c index 36314124488d..c9ff67100ef4 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/gpio.h> @@ -39,8 +40,6 @@ #include <asm/mach/flash.h> #include <linux/platform_data/mtd-onenand-omap2.h> -#include <linux/omap-dma.h> - #define DRIVER_NAME "omap2-onenand" #define ONENAND_BUFRAM_SIZE (1024 * 5) @@ -55,17 +54,15 @@ 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); 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) @@ -292,23 +289,31 @@ 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_async_tx_descriptor *tx; + 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, data_type, - 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 = dmaengine_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_io_timeout(&c->dma_done, msecs_to_jiffies(20))) { - omap_stop_dma(c->dma_channel); + dmaengine_terminate_sync(c->dma_chan); return -ETIMEDOUT; } @@ -468,8 +473,7 @@ 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; } @@ -521,25 +525,17 @@ 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 " @@ -553,7 +549,7 @@ 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; this->read_bufferram = omap2_onenand_read_bufferram; this->write_bufferram = omap2_onenand_write_bufferram; @@ -573,8 +569,8 @@ static int omap2_onenand_probe(struct platform_device *pdev) err_release_onenand: onenand_release(&c->mtd); 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: @@ -595,8 +591,8 @@ static int omap2_onenand_remove(struct platform_device *pdev) struct omap2_onenand *c = dev_get_drvdata(&pdev->dev); onenand_release(&c->mtd); - 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); |