Merge branch '2020-06-15-misc-bugfixes'

[oweals/u-boot.git] / drivers / mmc / mmc_legacy.c

diff --git a/drivers/mmc/mmc_legacy.c b/drivers/mmc/mmc_legacy.c
index 040728b45d3c9f415b31bdb330f506319457e45a..2bb12ceeaf105ad630ebfc7d110c559293fb9676 100644 (file)
--- a/drivers/mmc/mmc_legacy.c
+++ b/drivers/mmc/mmc_legacy.c
@@ -1,11 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
+#include <log.h>
 #include <malloc.h>
 #include <mmc.h>
 #include "mmc_private.h"
@@ -13,6 +13,28 @@
 static struct list_head mmc_devices;
 static int cur_dev_num = -1;
 
+#if CONFIG_IS_ENABLED(MMC_TINY)
+static struct mmc mmc_static;
+struct mmc *find_mmc_device(int dev_num)
+{
+       return &mmc_static;
+}
+
+void mmc_do_preinit(void)
+{
+       struct mmc *m = &mmc_static;
+#ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
+       mmc_set_preinit(m, 1);
+#endif
+       if (m->preinit)
+               mmc_start_init(m);
+}
+
+struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
+{
+       return &mmc->block_dev;
+}
+#else
 struct mmc *find_mmc_device(int dev_num)
 {
        struct mmc *m;
@@ -62,6 +84,7 @@ void mmc_do_preinit(void)
                        mmc_start_init(m);
        }
 }
+#endif
 
 void mmc_list_init(void)
 {
@@ -109,16 +132,59 @@ void print_mmc_devices(char separator)
 void print_mmc_devices(char separator) { }
 #endif
 
+#if CONFIG_IS_ENABLED(MMC_TINY)
+static struct mmc mmc_static = {
+       .dsr_imp                = 0,
+       .dsr                    = 0xffffffff,
+       .block_dev = {
+               .if_type        = IF_TYPE_MMC,
+               .removable      = 1,
+               .devnum         = 0,
+               .block_read     = mmc_bread,
+               .block_write    = mmc_bwrite,
+               .block_erase    = mmc_berase,
+               .part_type      = 0,
+       },
+};
+
+struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
+{
+       struct mmc *mmc = &mmc_static;
+
+       /* First MMC device registered, fail to register a new one.
+        * Given users are not expecting this to fail, instead
+        * of failing let's just return the only MMC device
+        */
+       if (mmc->cfg) {
+               debug("Warning: MMC_TINY doesn't support multiple MMC devices\n");
+               return mmc;
+       }
+
+       mmc->cfg = cfg;
+       mmc->priv = priv;
+
+       return mmc;
+}
+
+void mmc_destroy(struct mmc *mmc)
+{
+}
+#else
 struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
 {
        struct blk_desc *bdesc;
        struct mmc *mmc;
 
        /* quick validation */
-       if (cfg == NULL || cfg->ops == NULL || cfg->ops->send_cmd == NULL ||
-           cfg->f_min == 0 || cfg->f_max == 0 || cfg->b_max == 0)
+       if (cfg == NULL || cfg->f_min == 0 ||
+           cfg->f_max == 0 || cfg->b_max == 0)
                return NULL;
 
+#if !CONFIG_IS_ENABLED(DM_MMC)
+       if (cfg->ops == NULL || cfg->ops->send_cmd == NULL)
+               return NULL;
+#endif
+
        mmc = calloc(1, sizeof(*mmc));
        if (mmc == NULL)
                return NULL;
@@ -152,6 +218,7 @@ void mmc_destroy(struct mmc *mmc)
        /* only freeing memory for now */
        free(mmc);
 }
+#endif
 
 static int mmc_select_hwpartp(struct blk_desc *desc, int hwpart)
 {