diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/at_hdmac.c | 63 | ||||
| -rw-r--r-- | drivers/dma/at_hdmac_regs.h | 7 |
2 files changed, 31 insertions, 39 deletions
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 30ec030456cf..97f87b29b9f3 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -1177,14 +1177,22 @@ static void atc_free_chan_resources(struct dma_chan *chan) /*-- Module Management -----------------------------------------------*/ +/* cap_mask is a multi-u32 bitfield, fill it with proper C code. */ +static struct at_dma_platform_data at91sam9rl_config = { + .nr_channels = 2, +}; +static struct at_dma_platform_data at91sam9g45_config = { + .nr_channels = 8, +}; + #if defined(CONFIG_OF) static const struct of_device_id atmel_dma_dt_ids[] = { { .compatible = "atmel,at91sam9rl-dma", - .data = (void *)ATDMA_DEVTYPE_SAM9RL + .data = &at91sam9rl_config, }, { .compatible = "atmel,at91sam9g45-dma", - .data = (void *)ATDMA_DEVTYPE_SAM9G45 + .data = &at91sam9g45_config, }, { /* sentinel */ } @@ -1196,26 +1204,27 @@ MODULE_DEVICE_TABLE(of, atmel_dma_dt_ids); static const struct platform_device_id atdma_devtypes[] = { { .name = "at91sam9rl_dma", - .driver_data = ATDMA_DEVTYPE_SAM9RL, + .driver_data = (unsigned long) &at91sam9rl_config, }, { .name = "at91sam9g45_dma", - .driver_data = ATDMA_DEVTYPE_SAM9G45, + .driver_data = (unsigned long) &at91sam9g45_config, }, { /* sentinel */ } }; -static inline enum atdma_devtype __init at_dma_get_driver_data( - struct platform_device *pdev) +static inline struct at_dma_platform_data * __init at_dma_get_driver_data( + struct platform_device *pdev) { if (pdev->dev.of_node) { const struct of_device_id *match; match = of_match_node(atmel_dma_dt_ids, pdev->dev.of_node); if (match == NULL) - return ATDMA_DEVTYPE_UNDEFINED; - return (enum atdma_devtype)match->data; + return NULL; + return match->data; } - return platform_get_device_id(pdev)->driver_data; + return (struct at_dma_platform_data *) + platform_get_device_id(pdev)->driver_data; } /** @@ -1242,26 +1251,17 @@ static int __init at_dma_probe(struct platform_device *pdev) int irq; int err; int i; - u32 nr_channels; - dma_cap_mask_t cap_mask = {}; - enum atdma_devtype atdmatype; + struct at_dma_platform_data *plat_dat; - dma_cap_set(DMA_MEMCPY, cap_mask); + /* setup platform data for each SoC */ + dma_cap_set(DMA_MEMCPY, at91sam9rl_config.cap_mask); + dma_cap_set(DMA_MEMCPY, at91sam9g45_config.cap_mask); + dma_cap_set(DMA_SLAVE, at91sam9g45_config.cap_mask); /* get DMA parameters from controller type */ - atdmatype = at_dma_get_driver_data(pdev); - - switch (atdmatype) { - case ATDMA_DEVTYPE_SAM9RL: - nr_channels = 2; - break; - case ATDMA_DEVTYPE_SAM9G45: - nr_channels = 8; - dma_cap_set(DMA_SLAVE, cap_mask); - break; - default: - return -EINVAL; - } + plat_dat = at_dma_get_driver_data(pdev); + if (!plat_dat) + return -ENODEV; io = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!io) @@ -1272,15 +1272,14 @@ static int __init at_dma_probe(struct platform_device *pdev) return irq; size = sizeof(struct at_dma); - size += nr_channels * sizeof(struct at_dma_chan); + size += plat_dat->nr_channels * sizeof(struct at_dma_chan); atdma = kzalloc(size, GFP_KERNEL); if (!atdma) return -ENOMEM; /* discover transaction capabilities */ - atdma->dma_common.cap_mask = cap_mask; - atdma->all_chan_mask = (1 << nr_channels) - 1; - atdma->devtype = atdmatype; + atdma->dma_common.cap_mask = plat_dat->cap_mask; + atdma->all_chan_mask = (1 << plat_dat->nr_channels) - 1; size = resource_size(io); if (!request_mem_region(io->start, size, pdev->dev.driver->name)) { @@ -1326,7 +1325,7 @@ static int __init at_dma_probe(struct platform_device *pdev) /* initialize channels related values */ INIT_LIST_HEAD(&atdma->dma_common.channels); - for (i = 0; i < nr_channels; i++) { + for (i = 0; i < plat_dat->nr_channels; i++) { struct at_dma_chan *atchan = &atdma->chan[i]; atchan->chan_common.device = &atdma->dma_common; @@ -1371,7 +1370,7 @@ static int __init at_dma_probe(struct platform_device *pdev) dev_info(&pdev->dev, "Atmel AHB DMA Controller ( %s%s), %d channels\n", dma_has_cap(DMA_MEMCPY, atdma->dma_common.cap_mask) ? "cpy " : "", dma_has_cap(DMA_SLAVE, atdma->dma_common.cap_mask) ? "slave " : "", - nr_channels); + plat_dat->nr_channels); dma_async_device_register(&atdma->dma_common); diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h index d7d67372e4ff..dcaedfc181cf 100644 --- a/drivers/dma/at_hdmac_regs.h +++ b/drivers/dma/at_hdmac_regs.h @@ -248,12 +248,6 @@ static inline struct at_dma_chan *to_at_dma_chan(struct dma_chan *dchan) /*-- Controller ------------------------------------------------------*/ -enum atdma_devtype { - ATDMA_DEVTYPE_UNDEFINED = 0, - ATDMA_DEVTYPE_SAM9RL, /* compatible with SAM9RL DMA controller */ - ATDMA_DEVTYPE_SAM9G45, /* compatible with SAM9G45 DMA controller */ -}; - /** * struct at_dma - internal representation of an Atmel HDMA Controller * @chan_common: common dmaengine dma_device object members @@ -267,7 +261,6 @@ enum atdma_devtype { */ struct at_dma { struct dma_device dma_common; - enum atdma_devtype devtype; void __iomem *regs; struct clk *clk; u32 save_imr; |