diff options
Diffstat (limited to 'drivers/mmc/host/davinci_mmc.c')
| -rw-r--r-- | drivers/mmc/host/davinci_mmc.c | 88 |
1 files changed, 83 insertions, 5 deletions
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index 20636772c09..f8a96d652e9 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -34,6 +34,8 @@ #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/mmc-davinci.h> @@ -522,14 +524,16 @@ static int __init davinci_acquire_dma_channels(struct mmc_davinci_host *host) dma_cap_set(DMA_SLAVE, mask); host->dma_tx = - dma_request_channel(mask, edma_filter_fn, &host->txdma); + dma_request_slave_channel_compat(mask, edma_filter_fn, + &host->txdma, mmc_dev(host->mmc), "tx"); if (!host->dma_tx) { dev_err(mmc_dev(host->mmc), "Can't get dma_tx channel\n"); return -ENODEV; } host->dma_rx = - dma_request_channel(mask, edma_filter_fn, &host->rxdma); + dma_request_slave_channel_compat(mask, edma_filter_fn, + &host->rxdma, mmc_dev(host->mmc), "rx"); if (!host->dma_rx) { dev_err(mmc_dev(host->mmc), "Can't get dma_rx channel\n"); r = -ENODEV; @@ -1157,16 +1161,86 @@ static void __init init_mmcsd_host(struct mmc_davinci_host *host) mmc_davinci_reset_ctrl(host, 0); } -static int __init davinci_mmcsd_probe(struct platform_device *pdev) +static struct platform_device_id davinci_mmc_devtype[] = { + { + .name = "dm6441-mmc", + .driver_data = MMC_CTLR_VERSION_1, + }, { + .name = "da830-mmc", + .driver_data = MMC_CTLR_VERSION_2, + }, + {}, +}; +MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype); + +static const struct of_device_id davinci_mmc_dt_ids[] = { + { + .compatible = "ti,dm6441-mmc", + .data = &davinci_mmc_devtype[MMC_CTLR_VERSION_1], + }, + { + .compatible = "ti,da830-mmc", + .data = &davinci_mmc_devtype[MMC_CTLR_VERSION_2], + }, + {}, +}; +MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids); + +static struct davinci_mmc_config + *mmc_parse_pdata(struct platform_device *pdev) { + struct device_node *np; struct davinci_mmc_config *pdata = pdev->dev.platform_data; + const struct of_device_id *match = + of_match_device(of_match_ptr(davinci_mmc_dt_ids), &pdev->dev); + u32 data; + + np = pdev->dev.of_node; + if (!np) + return pdata; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(&pdev->dev, "Failed to allocate memory for struct davinci_mmc_config\n"); + goto nodata; + } + + if (match) + pdev->id_entry = match->data; + + if (of_property_read_u32(np, "max-frequency", &pdata->max_freq)) + dev_info(&pdev->dev, "'max-frequency' property not specified, defaulting to 25MHz\n"); + + of_property_read_u32(np, "bus-width", &data); + switch (data) { + case 1: + case 4: + case 8: + pdata->wires = data; + break; + default: + pdata->wires = 1; + dev_info(&pdev->dev, "Unsupported buswidth, defaulting to 1 bit\n"); + } +nodata: + return pdata; +} + +static int __init davinci_mmcsd_probe(struct platform_device *pdev) +{ + struct davinci_mmc_config *pdata = NULL; struct mmc_davinci_host *host = NULL; struct mmc_host *mmc = NULL; struct resource *r, *mem = NULL; int ret = 0, irq = 0; size_t mem_size; + const struct platform_device_id *id_entry; - /* REVISIT: when we're fully converted, fail if pdata is NULL */ + pdata = mmc_parse_pdata(pdev); + if (pdata == NULL) { + dev_err(&pdev->dev, "Couldn't get platform data\n"); + return -ENOENT; + } ret = -ENODEV; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -1237,7 +1311,9 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) if (pdata && (pdata->wires == 8)) mmc->caps |= (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA); - host->version = pdata->version; + id_entry = platform_get_device_id(pdev); + if (id_entry) + host->version = id_entry->driver_data; mmc->ops = &mmc_davinci_ops; mmc->f_min = 312500; @@ -1406,8 +1482,10 @@ static struct platform_driver davinci_mmcsd_driver = { .name = "davinci_mmc", .owner = THIS_MODULE, .pm = davinci_mmcsd_pm_ops, + .of_match_table = of_match_ptr(davinci_mmc_dt_ids), }, .remove = __exit_p(davinci_mmcsd_remove), + .id_table = davinci_mmc_devtype, }; static int __init davinci_mmcsd_init(void) |