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path: root/drivers/mmc/host/davinci_mmc.c
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Diffstat (limited to 'drivers/mmc/host/davinci_mmc.c')
-rw-r--r--drivers/mmc/host/davinci_mmc.c151
1 files changed, 53 insertions, 98 deletions
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 693144e7427b..a56373c75983 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -32,12 +32,10 @@
#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
-#include <linux/edma.h>
#include <linux/mmc/mmc.h>
#include <linux/of.h>
#include <linux/of_device.h>
-#include <linux/platform_data/edma.h>
#include <linux/platform_data/mmc-davinci.h>
/*
@@ -202,7 +200,6 @@ struct mmc_davinci_host {
u32 buffer_bytes_left;
u32 bytes_left;
- u32 rxdma, txdma;
struct dma_chan *dma_tx;
struct dma_chan *dma_rx;
bool use_dma;
@@ -513,35 +510,20 @@ davinci_release_dma_channels(struct mmc_davinci_host *host)
static int __init davinci_acquire_dma_channels(struct mmc_davinci_host *host)
{
- int r;
- dma_cap_mask_t mask;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- host->dma_tx =
- dma_request_slave_channel_compat(mask, edma_filter_fn,
- &host->txdma, mmc_dev(host->mmc), "tx");
- if (!host->dma_tx) {
+ host->dma_tx = dma_request_chan(mmc_dev(host->mmc), "tx");
+ if (IS_ERR(host->dma_tx)) {
dev_err(mmc_dev(host->mmc), "Can't get dma_tx channel\n");
- return -ENODEV;
+ return PTR_ERR(host->dma_tx);
}
- host->dma_rx =
- dma_request_slave_channel_compat(mask, edma_filter_fn,
- &host->rxdma, mmc_dev(host->mmc), "rx");
- if (!host->dma_rx) {
+ host->dma_rx = dma_request_chan(mmc_dev(host->mmc), "rx");
+ if (IS_ERR(host->dma_rx)) {
dev_err(mmc_dev(host->mmc), "Can't get dma_rx channel\n");
- r = -ENODEV;
- goto free_master_write;
+ dma_release_channel(host->dma_tx);
+ return PTR_ERR(host->dma_rx);
}
return 0;
-
-free_master_write:
- dma_release_channel(host->dma_tx);
-
- return r;
}
/*----------------------------------------------------------------------*/
@@ -1223,7 +1205,7 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
struct mmc_davinci_host *host = NULL;
struct mmc_host *mmc = NULL;
struct resource *r, *mem = NULL;
- int ret = 0, irq = 0;
+ int ret, irq;
size_t mem_size;
const struct platform_device_id *id_entry;
@@ -1233,50 +1215,40 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
return -ENOENT;
}
- ret = -ENODEV;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!r || irq == NO_IRQ)
- goto out;
+ return -ENODEV;
- ret = -EBUSY;
mem_size = resource_size(r);
- mem = request_mem_region(r->start, mem_size, pdev->name);
+ mem = devm_request_mem_region(&pdev->dev, r->start, mem_size,
+ pdev->name);
if (!mem)
- goto out;
+ return -EBUSY;
- ret = -ENOMEM;
mmc = mmc_alloc_host(sizeof(struct mmc_davinci_host), &pdev->dev);
if (!mmc)
- goto out;
+ return -ENOMEM;
host = mmc_priv(mmc);
host->mmc = mmc; /* Important */
- r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!r)
- dev_warn(&pdev->dev, "RX DMA resource not specified\n");
- else
- host->rxdma = r->start;
-
- r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (!r)
- dev_warn(&pdev->dev, "TX DMA resource not specified\n");
- else
- host->txdma = r->start;
-
host->mem_res = mem;
- host->base = ioremap(mem->start, mem_size);
- if (!host->base)
- goto out;
+ host->base = devm_ioremap(&pdev->dev, mem->start, mem_size);
+ if (!host->base) {
+ ret = -ENOMEM;
+ goto ioremap_fail;
+ }
- ret = -ENXIO;
- host->clk = clk_get(&pdev->dev, "MMCSDCLK");
+ host->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(host->clk)) {
ret = PTR_ERR(host->clk);
- goto out;
+ goto clk_get_fail;
}
- clk_enable(host->clk);
+ ret = clk_prepare_enable(host->clk);
+ if (ret)
+ goto clk_prepare_enable_fail;
+
host->mmc_input_clk = clk_get_rate(host->clk);
init_mmcsd_host(host);
@@ -1291,8 +1263,13 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
host->mmc_irq = irq;
host->sdio_irq = platform_get_irq(pdev, 1);
- if (host->use_dma && davinci_acquire_dma_channels(host) != 0)
- host->use_dma = 0;
+ if (host->use_dma) {
+ ret = davinci_acquire_dma_channels(host);
+ if (ret == -EPROBE_DEFER)
+ goto dma_probe_defer;
+ else if (ret)
+ host->use_dma = 0;
+ }
/* REVISIT: someday, support IRQ-driven card detection. */
mmc->caps |= MMC_CAP_NEEDS_POLL;
@@ -1346,15 +1323,17 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
ret = mmc_add_host(mmc);
if (ret < 0)
- goto out;
+ goto mmc_add_host_fail;
- ret = request_irq(irq, mmc_davinci_irq, 0, mmc_hostname(mmc), host);
+ ret = devm_request_irq(&pdev->dev, irq, mmc_davinci_irq, 0,
+ mmc_hostname(mmc), host);
if (ret)
- goto out;
+ goto request_irq_fail;
if (host->sdio_irq >= 0) {
- ret = request_irq(host->sdio_irq, mmc_davinci_sdio_irq, 0,
- mmc_hostname(mmc), host);
+ ret = devm_request_irq(&pdev->dev, host->sdio_irq,
+ mmc_davinci_sdio_irq, 0,
+ mmc_hostname(mmc), host);
if (!ret)
mmc->caps |= MMC_CAP_SDIO_IRQ;
}
@@ -1367,28 +1346,18 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
return 0;
-out:
+request_irq_fail:
+ mmc_remove_host(mmc);
+mmc_add_host_fail:
mmc_davinci_cpufreq_deregister(host);
cpu_freq_fail:
- if (host) {
- davinci_release_dma_channels(host);
-
- if (host->clk) {
- clk_disable(host->clk);
- clk_put(host->clk);
- }
-
- if (host->base)
- iounmap(host->base);
- }
-
- if (mmc)
- mmc_free_host(mmc);
-
- if (mem)
- release_resource(mem);
-
- dev_dbg(&pdev->dev, "probe err %d\n", ret);
+ davinci_release_dma_channels(host);
+dma_probe_defer:
+ clk_disable_unprepare(host->clk);
+clk_prepare_enable_fail:
+clk_get_fail:
+ioremap_fail:
+ mmc_free_host(mmc);
return ret;
}
@@ -1397,25 +1366,11 @@ static int __exit davinci_mmcsd_remove(struct platform_device *pdev)
{
struct mmc_davinci_host *host = platform_get_drvdata(pdev);
- if (host) {
- mmc_davinci_cpufreq_deregister(host);
-
- mmc_remove_host(host->mmc);
- free_irq(host->mmc_irq, host);
- if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
- free_irq(host->sdio_irq, host);
-
- davinci_release_dma_channels(host);
-
- clk_disable(host->clk);
- clk_put(host->clk);
-
- iounmap(host->base);
-
- release_resource(host->mem_res);
-
- mmc_free_host(host->mmc);
- }
+ mmc_remove_host(host->mmc);
+ mmc_davinci_cpufreq_deregister(host);
+ davinci_release_dma_channels(host);
+ clk_disable_unprepare(host->clk);
+ mmc_free_host(host->mmc);
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-23 15:21:34 +0300