sdhci: support for ADMA only hosts
Add support for ADMA on SDHCI hosts, not supporting SDMA. According to the SDHCI specifications a host can support ADMA but not SDMA Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -396,7 +396,7 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host)
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if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
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((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
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(host->flags & SDHCI_USE_DMA)) {
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(host->flags & SDHCI_USE_SDMA)) {
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dev_warn(&pdev->dev, "Will use DMA mode even though HW "
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"doesn't fully claim to support it.\n");
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}
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@ -655,7 +655,7 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
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count = sdhci_calc_timeout(host, data);
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sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
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if (host->flags & SDHCI_USE_DMA)
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if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))
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host->flags |= SDHCI_REQ_USE_DMA;
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/*
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@ -1600,7 +1600,7 @@ int sdhci_resume_host(struct sdhci_host *host)
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{
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int ret;
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if (host->flags & SDHCI_USE_DMA) {
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if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
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if (host->ops->enable_dma)
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host->ops->enable_dma(host);
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}
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@ -1681,23 +1681,20 @@ int sdhci_add_host(struct sdhci_host *host)
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caps = sdhci_readl(host, SDHCI_CAPABILITIES);
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if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
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host->flags |= SDHCI_USE_DMA;
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else if (!(caps & SDHCI_CAN_DO_DMA))
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DBG("Controller doesn't have DMA capability\n");
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host->flags |= SDHCI_USE_SDMA;
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else if (!(caps & SDHCI_CAN_DO_SDMA))
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DBG("Controller doesn't have SDMA capability\n");
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else
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host->flags |= SDHCI_USE_DMA;
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host->flags |= SDHCI_USE_SDMA;
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if ((host->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
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(host->flags & SDHCI_USE_DMA)) {
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(host->flags & SDHCI_USE_SDMA)) {
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DBG("Disabling DMA as it is marked broken\n");
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host->flags &= ~SDHCI_USE_DMA;
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host->flags &= ~SDHCI_USE_SDMA;
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}
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if (host->flags & SDHCI_USE_DMA) {
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if ((host->version >= SDHCI_SPEC_200) &&
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(caps & SDHCI_CAN_DO_ADMA2))
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if ((host->version >= SDHCI_SPEC_200) && (caps & SDHCI_CAN_DO_ADMA2))
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host->flags |= SDHCI_USE_ADMA;
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}
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if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
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(host->flags & SDHCI_USE_ADMA)) {
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@ -1705,13 +1702,14 @@ int sdhci_add_host(struct sdhci_host *host)
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host->flags &= ~SDHCI_USE_ADMA;
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}
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if (host->flags & SDHCI_USE_DMA) {
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if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
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if (host->ops->enable_dma) {
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if (host->ops->enable_dma(host)) {
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printk(KERN_WARNING "%s: No suitable DMA "
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"available. Falling back to PIO.\n",
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mmc_hostname(mmc));
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host->flags &= ~(SDHCI_USE_DMA | SDHCI_USE_ADMA);
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host->flags &=
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~(SDHCI_USE_SDMA | SDHCI_USE_ADMA);
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}
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}
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}
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@ -1739,7 +1737,7 @@ int sdhci_add_host(struct sdhci_host *host)
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* mask, but PIO does not need the hw shim so we set a new
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* mask here in that case.
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*/
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if (!(host->flags & SDHCI_USE_DMA)) {
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if (!(host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))) {
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host->dma_mask = DMA_BIT_MASK(64);
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mmc_dev(host->mmc)->dma_mask = &host->dma_mask;
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}
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@ -1816,7 +1814,7 @@ int sdhci_add_host(struct sdhci_host *host)
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*/
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if (host->flags & SDHCI_USE_ADMA)
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mmc->max_hw_segs = 128;
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else if (host->flags & SDHCI_USE_DMA)
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else if (host->flags & SDHCI_USE_SDMA)
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mmc->max_hw_segs = 1;
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else /* PIO */
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mmc->max_hw_segs = 128;
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@ -1899,10 +1897,10 @@ int sdhci_add_host(struct sdhci_host *host)
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mmc_add_host(mmc);
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printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s%s\n",
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printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s\n",
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mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),
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(host->flags & SDHCI_USE_ADMA)?"A":"",
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(host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
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(host->flags & SDHCI_USE_ADMA) ? "ADMA" :
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(host->flags & SDHCI_USE_SDMA) ? "DMA" : "PIO");
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sdhci_enable_card_detection(host);
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@ -143,7 +143,7 @@
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#define SDHCI_CAN_DO_ADMA2 0x00080000
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#define SDHCI_CAN_DO_ADMA1 0x00100000
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#define SDHCI_CAN_DO_HISPD 0x00200000
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#define SDHCI_CAN_DO_DMA 0x00400000
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#define SDHCI_CAN_DO_SDMA 0x00400000
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#define SDHCI_CAN_VDD_330 0x01000000
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#define SDHCI_CAN_VDD_300 0x02000000
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#define SDHCI_CAN_VDD_180 0x04000000
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@ -252,7 +252,7 @@ struct sdhci_host {
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spinlock_t lock; /* Mutex */
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int flags; /* Host attributes */
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#define SDHCI_USE_DMA (1<<0) /* Host is DMA capable */
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#define SDHCI_USE_SDMA (1<<0) /* Host is SDMA capable */
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#define SDHCI_USE_ADMA (1<<1) /* Host is ADMA capable */
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#define SDHCI_REQ_USE_DMA (1<<2) /* Use DMA for this req. */
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#define SDHCI_DEVICE_DEAD (1<<3) /* Device unresponsive */
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