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mtd: onenand: omap2: Convert to use dmaengine for memcpy 

Do not use the legacy and deprecated omap-dma interface for setting up the
memcpy.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Acked-by: Roger Quadros <rogerq@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Peter Ujfalusi 2018-01-12 14:16:08 +01:00 committed by Boris Brezillon
parent fb25070afd
commit 3ed6a4d1de
1 changed files with 38 additions and 42 deletions
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80
drivers/mtd/onenand/omap2.c
View File

@ -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);