@@ -16,6 +16,7 @@
#include <linux/bitfield.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/host.h>
+#include <linux/regulator/consumer.h>
#include "sdhci.h"
#include "sdhci-uhs2.h"
@@ -997,6 +998,107 @@ static irqreturn_t sdhci_uhs2_thread_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
+/*****************************************************************************\
+ *
+ * Device allocation/registration *
+ * *
+\*****************************************************************************/
+
+static void __sdhci_uhs2_add_host_v4(struct sdhci_host *host, u32 caps1)
+{
+ struct mmc_host *mmc;
+ u32 max_current_caps2;
+
+ mmc = host->mmc;
+
+ /* Support UHS2 */
+ if (caps1 & SDHCI_SUPPORT_UHS2)
+ mmc->caps2 |= MMC_CAP2_SD_UHS2;
+
+ max_current_caps2 = sdhci_readl(host, SDHCI_MAX_CURRENT_1);
+
+ if ((caps1 & SDHCI_CAN_VDD2_180) &&
+ !max_current_caps2 &&
+ !IS_ERR(mmc->supply.vmmc2)) {
+ /* UHS2 - VDD2 */
+ int curr = regulator_get_current_limit(mmc->supply.vmmc2);
+
+ if (curr > 0) {
+ /* convert to SDHCI_MAX_CURRENT format */
+ curr = curr / 1000; /* convert to mA */
+ curr = curr / SDHCI_MAX_CURRENT_MULTIPLIER;
+ curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT);
+ max_current_caps2 = curr;
+ }
+ }
+
+ if (caps1 & SDHCI_CAN_VDD2_180)
+ mmc->ocr_avail_uhs2 |= MMC_VDD_165_195;
+ else
+ mmc->caps2 &= ~MMC_CAP2_SD_UHS2;
+}
+
+static int sdhci_uhs2_host_ops_init(struct sdhci_host *host);
+
+static void __sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
+{
+ if (!sdhci_uhs2_mode(host))
+ return;
+
+ if (!dead)
+ sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_FULL);
+}
+
+int sdhci_uhs2_add_host(struct sdhci_host *host)
+{
+ struct mmc_host *mmc = host->mmc;
+ int ret;
+
+ ret = sdhci_setup_host(host);
+ if (ret)
+ return ret;
+
+ if (host->version >= SDHCI_SPEC_400)
+ __sdhci_uhs2_add_host_v4(host, host->caps1);
+
+ if ((mmc->caps2 & MMC_CAP2_SD_UHS2) && !host->v4_mode)
+ /* host doesn't want to enable UHS2 support */
+ mmc->caps2 &= ~MMC_CAP2_SD_UHS2;
+
+ /* overwrite ops */
+ if (mmc->caps2 & MMC_CAP2_SD_UHS2)
+ sdhci_uhs2_host_ops_init(host);
+
+ host->complete_work_fn = sdhci_uhs2_complete_work;
+ host->thread_irq_fn = sdhci_uhs2_thread_irq;
+
+ /* LED support not implemented for UHS2 */
+ host->quirks |= SDHCI_QUIRK_NO_LED;
+
+ ret = __sdhci_add_host(host);
+ if (ret)
+ goto cleanup;
+
+ return 0;
+
+cleanup:
+ if (host->version >= SDHCI_SPEC_400)
+ __sdhci_uhs2_remove_host(host, 0);
+
+ sdhci_cleanup_host(host);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_uhs2_add_host);
+
+void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead)
+{
+ __sdhci_uhs2_remove_host(host, dead);
+
+ sdhci_remove_host(host, dead);
+}
+EXPORT_SYMBOL_GPL(sdhci_uhs2_remove_host);
+
void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct sdhci_host *host = mmc_priv(mmc);
@@ -186,5 +186,7 @@ void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq);
int sdhci_uhs2_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
u32 sdhci_uhs2_irq(struct sdhci_host *host, u32 intmask);
+int sdhci_uhs2_add_host(struct sdhci_host *host);
+void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead);
#endif /* __SDHCI_UHS2_H */
@@ -4104,6 +4104,9 @@ struct sdhci_host *sdhci_alloc_host(struct device *dev,
host->max_timeout_count = 0xE;
+ host->complete_work_fn = sdhci_complete_work;
+ host->thread_irq_fn = sdhci_thread_irq;
+
return host;
}
@@ -4853,7 +4856,7 @@ int __sdhci_add_host(struct sdhci_host *host)
if (!host->complete_wq)
return -ENOMEM;
- INIT_WORK(&host->complete_work, sdhci_complete_work);
+ INIT_WORK(&host->complete_work, host->complete_work_fn);
timer_setup(&host->timer, sdhci_timeout_timer, 0);
timer_setup(&host->data_timer, sdhci_timeout_data_timer, 0);
@@ -4862,7 +4865,7 @@ int __sdhci_add_host(struct sdhci_host *host)
sdhci_init(host, 0);
- ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq,
+ ret = request_threaded_irq(host->irq, sdhci_irq, host->thread_irq_fn,
IRQF_SHARED, mmc_hostname(mmc), host);
if (ret) {
pr_err("%s: Failed to request IRQ %d: %d\n",
@@ -626,6 +626,9 @@ struct sdhci_host {
struct timer_list timer; /* Timer for timeouts */
struct timer_list data_timer; /* Timer for data timeouts */
+ void (*complete_work_fn)(struct work_struct *work);
+ irqreturn_t (*thread_irq_fn)(int irq, void *dev_id);
+
#if IS_ENABLED(CONFIG_MMC_SDHCI_EXTERNAL_DMA)
struct dma_chan *rx_chan;
struct dma_chan *tx_chan;