diff options
author | Marek Vasut <marex@denx.de> | 2012-08-03 17:26:12 +0200 |
---|---|---|
committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-08-17 22:54:15 +0100 |
commit | 65defb9b3ba67c1d6f88ac62c24644eb23a7b676 (patch) | |
tree | 68b68b0eb966f6691353363deea65de0d1ea06d1 /drivers/mmc/host/mxs-mmc.c | |
parent | 646781d3325cdcc648b8eeb3b7cda393bcb78659 (diff) | |
download | linux-65defb9b3ba67c1d6f88ac62c24644eb23a7b676.tar.gz linux-65defb9b3ba67c1d6f88ac62c24644eb23a7b676.tar.bz2 linux-65defb9b3ba67c1d6f88ac62c24644eb23a7b676.zip |
mmc: spi: Pull out common DMA parts from MXS MMC
These parts will be used by the MXS SPI driver too.
Signed-off-by: Marek Vasut <marex@denx.de>
Acked-by: Chris Ball <cjb@laptop.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/mmc/host/mxs-mmc.c')
-rw-r--r-- | drivers/mmc/host/mxs-mmc.c | 88 |
1 files changed, 42 insertions, 46 deletions
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c index 0813340fa29c..4da996654772 100644 --- a/drivers/mmc/host/mxs-mmc.c +++ b/drivers/mmc/host/mxs-mmc.c @@ -41,7 +41,6 @@ #include <linux/gpio.h> #include <linux/regulator/consumer.h> #include <linux/module.h> -#include <linux/fsl/mxs-dma.h> #include <linux/pinctrl/consumer.h> #include <linux/stmp_device.h> #include <linux/mmc/mxs-mmc.h> @@ -69,13 +68,6 @@ struct mxs_mmc_host { struct mmc_command *cmd; struct mmc_data *data; - int dma_channel; - struct dma_chan *dmach; - struct mxs_dma_data dma_data; - unsigned int dma_dir; - enum dma_transfer_direction slave_dirn; - u32 ssp_pio_words[SSP_PIO_NUM]; - unsigned char bus_width; spinlock_t lock; int sdio_irq_en; @@ -163,7 +155,7 @@ static void mxs_mmc_request_done(struct mxs_mmc_host *host) if (data) { dma_unmap_sg(mmc_dev(host->mmc), data->sg, - data->sg_len, host->dma_dir); + data->sg_len, ssp->dma_dir); /* * If there was an error on any block, we mark all * data blocks as being in error. @@ -232,6 +224,7 @@ static irqreturn_t mxs_mmc_irq_handler(int irq, void *dev_id) static struct dma_async_tx_descriptor *mxs_mmc_prep_dma( struct mxs_mmc_host *host, unsigned long flags) { + struct mxs_ssp *ssp = &host->ssp; struct dma_async_tx_descriptor *desc; struct mmc_data *data = host->data; struct scatterlist * sgl; @@ -240,24 +233,24 @@ static struct dma_async_tx_descriptor *mxs_mmc_prep_dma( if (data) { /* data */ dma_map_sg(mmc_dev(host->mmc), data->sg, - data->sg_len, host->dma_dir); + data->sg_len, ssp->dma_dir); sgl = data->sg; sg_len = data->sg_len; } else { /* pio */ - sgl = (struct scatterlist *) host->ssp_pio_words; + sgl = (struct scatterlist *) ssp->ssp_pio_words; sg_len = SSP_PIO_NUM; } - desc = dmaengine_prep_slave_sg(host->dmach, - sgl, sg_len, host->slave_dirn, flags); + desc = dmaengine_prep_slave_sg(ssp->dmach, + sgl, sg_len, ssp->slave_dirn, flags); if (desc) { desc->callback = mxs_mmc_dma_irq_callback; desc->callback_param = host; } else { if (data) dma_unmap_sg(mmc_dev(host->mmc), data->sg, - data->sg_len, host->dma_dir); + data->sg_len, ssp->dma_dir); } return desc; @@ -265,6 +258,7 @@ static struct dma_async_tx_descriptor *mxs_mmc_prep_dma( static void mxs_mmc_bc(struct mxs_mmc_host *host) { + struct mxs_ssp *ssp = &host->ssp; struct mmc_command *cmd = host->cmd; struct dma_async_tx_descriptor *desc; u32 ctrl0, cmd0, cmd1; @@ -278,17 +272,17 @@ static void mxs_mmc_bc(struct mxs_mmc_host *host) cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN; } - host->ssp_pio_words[0] = ctrl0; - host->ssp_pio_words[1] = cmd0; - host->ssp_pio_words[2] = cmd1; - host->dma_dir = DMA_NONE; - host->slave_dirn = DMA_TRANS_NONE; + ssp->ssp_pio_words[0] = ctrl0; + ssp->ssp_pio_words[1] = cmd0; + ssp->ssp_pio_words[2] = cmd1; + ssp->dma_dir = DMA_NONE; + ssp->slave_dirn = DMA_TRANS_NONE; desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK); if (!desc) goto out; dmaengine_submit(desc); - dma_async_issue_pending(host->dmach); + dma_async_issue_pending(ssp->dmach); return; out: @@ -298,6 +292,7 @@ out: static void mxs_mmc_ac(struct mxs_mmc_host *host) { + struct mxs_ssp *ssp = &host->ssp; struct mmc_command *cmd = host->cmd; struct dma_async_tx_descriptor *desc; u32 ignore_crc, get_resp, long_resp; @@ -319,17 +314,17 @@ static void mxs_mmc_ac(struct mxs_mmc_host *host) cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN; } - host->ssp_pio_words[0] = ctrl0; - host->ssp_pio_words[1] = cmd0; - host->ssp_pio_words[2] = cmd1; - host->dma_dir = DMA_NONE; - host->slave_dirn = DMA_TRANS_NONE; + ssp->ssp_pio_words[0] = ctrl0; + ssp->ssp_pio_words[1] = cmd0; + ssp->ssp_pio_words[2] = cmd1; + ssp->dma_dir = DMA_NONE; + ssp->slave_dirn = DMA_TRANS_NONE; desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK); if (!desc) goto out; dmaengine_submit(desc); - dma_async_issue_pending(host->dmach); + dma_async_issue_pending(ssp->dmach); return; out: @@ -441,11 +436,11 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host) writel(val, ssp->base + HW_SSP_TIMING(ssp)); /* pio */ - host->ssp_pio_words[0] = ctrl0; - host->ssp_pio_words[1] = cmd0; - host->ssp_pio_words[2] = cmd1; - host->dma_dir = DMA_NONE; - host->slave_dirn = DMA_TRANS_NONE; + ssp->ssp_pio_words[0] = ctrl0; + ssp->ssp_pio_words[1] = cmd0; + ssp->ssp_pio_words[2] = cmd1; + ssp->dma_dir = DMA_NONE; + ssp->slave_dirn = DMA_TRANS_NONE; desc = mxs_mmc_prep_dma(host, 0); if (!desc) goto out; @@ -453,14 +448,14 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host) /* append data sg */ WARN_ON(host->data != NULL); host->data = data; - host->dma_dir = dma_data_dir; - host->slave_dirn = slave_dirn; + ssp->dma_dir = dma_data_dir; + ssp->slave_dirn = slave_dirn; desc = mxs_mmc_prep_dma(host, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc) goto out; dmaengine_submit(desc); - dma_async_issue_pending(host->dmach); + dma_async_issue_pending(ssp->dmach); return; out: dev_warn(mmc_dev(host->mmc), @@ -557,14 +552,15 @@ static const struct mmc_host_ops mxs_mmc_ops = { static bool mxs_mmc_dma_filter(struct dma_chan *chan, void *param) { struct mxs_mmc_host *host = param; + struct mxs_ssp *ssp = &host->ssp; if (!mxs_dma_is_apbh(chan)) return false; - if (chan->chan_id != host->dma_channel) + if (chan->chan_id != ssp->dma_channel) return false; - chan->private = &host->dma_data; + chan->private = &ssp->dma_data; return true; } @@ -632,7 +628,7 @@ static int mxs_mmc_probe(struct platform_device *pdev) * to use generic DMA binding later when the helpers get in. */ ret = of_property_read_u32(np, "fsl,ssp-dma-channel", - &host->dma_channel); + &ssp->dma_channel); if (ret) { dev_err(mmc_dev(host->mmc), "failed to get dma channel\n"); @@ -640,7 +636,7 @@ static int mxs_mmc_probe(struct platform_device *pdev) } } else { ssp->devid = pdev->id_entry->driver_data; - host->dma_channel = dmares->start; + ssp->dma_channel = dmares->start; } host->mmc = mmc; @@ -673,9 +669,9 @@ static int mxs_mmc_probe(struct platform_device *pdev) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - host->dma_data.chan_irq = irq_dma; - host->dmach = dma_request_channel(mask, mxs_mmc_dma_filter, host); - if (!host->dmach) { + ssp->dma_data.chan_irq = irq_dma; + ssp->dmach = dma_request_channel(mask, mxs_mmc_dma_filter, host); + if (!ssp->dmach) { dev_err(mmc_dev(host->mmc), "%s: failed to request dma\n", __func__); goto out_clk_put; @@ -714,7 +710,7 @@ static int mxs_mmc_probe(struct platform_device *pdev) mmc->max_blk_size = 1 << 0xf; mmc->max_blk_count = (ssp_is_old(ssp)) ? 0xff : 0xffffff; mmc->max_req_size = (ssp_is_old(ssp)) ? 0xffff : 0xffffffff; - mmc->max_seg_size = dma_get_max_seg_size(host->dmach->device->dev); + mmc->max_seg_size = dma_get_max_seg_size(ssp->dmach->device->dev); platform_set_drvdata(pdev, mmc); @@ -734,8 +730,8 @@ static int mxs_mmc_probe(struct platform_device *pdev) return 0; out_free_dma: - if (host->dmach) - dma_release_channel(host->dmach); + if (ssp->dmach) + dma_release_channel(ssp->dmach); out_clk_put: clk_disable_unprepare(ssp->clk); clk_put(ssp->clk); @@ -754,8 +750,8 @@ static int mxs_mmc_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); - if (host->dmach) - dma_release_channel(host->dmach); + if (ssp->dmach) + dma_release_channel(ssp->dmach); clk_disable_unprepare(ssp->clk); clk_put(ssp->clk); |