@@ -2,7 +2,7 @@ menu "MMC Host controller Support"
config MMC
bool "Enable MMC support"
- depends on ARCH_SUNXI
+ depends on ARCH_SUNXI || SANDBOX
help
TODO: Move all architectures to use this option
@@ -58,4 +58,13 @@ config MMC_UNIPHIER
help
This selects support for the SD/MMC Host Controller on UniPhier SoCs.
+config SANDBOX_MMC
+ bool "Sandbox MMC support"
+ depends on MMC && SANDBOX
+ help
+ This select a dummy sandbox MMC driver. At present this does nothing
+ other than allow sandbox to be build with MMC support. This
+ improves build coverage for sandbox and makes it easier to detect
+ MMC build errors with sandbox.
+
endmenu
@@ -8,18 +8,150 @@
#include <common.h>
#include <dm.h>
#include <errno.h>
+#include <fdtdec.h>
#include <mmc.h>
#include <asm/test.h>
DECLARE_GLOBAL_DATA_PTR;
+struct sandbox_mmc_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+};
+
+/**
+ * sandbox_mmc_send_cmd() - Emulate SD commands
+ *
+ * This emulate an SD card version 2. Single-block reads result in zero data.
+ * Multiple-block reads return a test string.
+ */
+static int sandbox_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ switch (cmd->cmdidx) {
+ case MMC_CMD_ALL_SEND_CID:
+ break;
+ case SD_CMD_SEND_RELATIVE_ADDR:
+ cmd->response[0] = 0 << 16; /* mmc->rca */
+ case MMC_CMD_GO_IDLE_STATE:
+ break;
+ case SD_CMD_SEND_IF_COND:
+ cmd->response[0] = 0xaa;
+ break;
+ case MMC_CMD_SEND_STATUS:
+ cmd->response[0] = MMC_STATUS_RDY_FOR_DATA;
+ break;
+ case MMC_CMD_SELECT_CARD:
+ break;
+ case MMC_CMD_SEND_CSD:
+ cmd->response[0] = 0;
+ cmd->response[1] = 10 << 16; /* 1 << block_len */
+ break;
+ case SD_CMD_SWITCH_FUNC: {
+ u32 *resp = (u32 *)data->dest;
+
+ resp[7] = cpu_to_be32(SD_HIGHSPEED_BUSY);
+ break;
+ }
+ case MMC_CMD_READ_SINGLE_BLOCK:
+ memset(data->dest, '\0', data->blocksize);
+ break;
+ case MMC_CMD_READ_MULTIPLE_BLOCK:
+ strcpy(data->dest, "this is a test");
+ break;
+ case MMC_CMD_STOP_TRANSMISSION:
+ break;
+ case SD_CMD_APP_SEND_OP_COND:
+ cmd->response[0] = OCR_BUSY | OCR_HCS;
+ cmd->response[1] = 0;
+ cmd->response[2] = 0;
+ break;
+ case MMC_CMD_APP_CMD:
+ break;
+ case MMC_CMD_SET_BLOCKLEN:
+ debug("block len %d\n", cmd->cmdarg);
+ break;
+ case SD_CMD_APP_SEND_SCR: {
+ u32 *scr = (u32 *)data->dest;
+
+ scr[0] = cpu_to_be32(2 << 24 | 1 << 15); /* SD version 3 */
+ break;
+ }
+ default:
+ debug("%s: Unknown command %d\n", __func__, cmd->cmdidx);
+ break;
+ }
+
+ return 0;
+}
+
+static void sandbox_mmc_set_ios(struct mmc *mmc)
+{
+}
+
+static int sandbox_mmc_init(struct mmc *mmc)
+{
+ return 0;
+}
+
+static int sandbox_mmc_getcd(struct mmc *mmc)
+{
+ return 1;
+}
+
+static const struct mmc_ops sandbox_mmc_ops = {
+ .send_cmd = sandbox_mmc_send_cmd,
+ .set_ios = sandbox_mmc_set_ios,
+ .init = sandbox_mmc_init,
+ .getcd = sandbox_mmc_getcd,
+};
+
+int sandbox_mmc_probe(struct udevice *dev)
+{
+ struct sandbox_mmc_plat *plat = dev_get_platdata(dev);
+
+ return mmc_init(&plat->mmc);
+}
+
+int sandbox_mmc_bind(struct udevice *dev)
+{
+ struct sandbox_mmc_plat *plat = dev_get_platdata(dev);
+ struct mmc_config *cfg = &plat->cfg;
+ int ret;
+
+ cfg->name = dev->name;
+ cfg->ops = &sandbox_mmc_ops;
+ cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_8BIT;
+ cfg->voltages = MMC_VDD_165_195 | MMC_VDD_32_33 | MMC_VDD_33_34;
+ cfg->f_min = 1000000;
+ cfg->f_max = 52000000;
+ cfg->b_max = U32_MAX;
+
+ ret = mmc_bind(dev, &plat->mmc, cfg);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+int sandbox_mmc_unbind(struct udevice *dev)
+{
+ mmc_unbind(dev);
+
+ return 0;
+}
+
static const struct udevice_id sandbox_mmc_ids[] = {
{ .compatible = "sandbox,mmc" },
{ }
};
-U_BOOT_DRIVER(warm_mmc_sandbox) = {
+U_BOOT_DRIVER(mmc_sandbox) = {
.name = "mmc_sandbox",
.id = UCLASS_MMC,
.of_match = sandbox_mmc_ids,
+ .bind = sandbox_mmc_bind,
+ .unbind = sandbox_mmc_unbind,
+ .probe = sandbox_mmc_probe,
+ .platdata_auto_alloc_size = sizeof(struct sandbox_mmc_plat),
};
Add an emulation of an SD card to sandbox, allowing MMC to be used in tests. The emulation is very simple, supporting only card detection and reading test data. Signed-off-by: Simon Glass <sjg@chromium.org> --- Changes in v2: None drivers/mmc/Kconfig | 11 +++- drivers/mmc/sandbox_mmc.c | 134 +++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 143 insertions(+), 2 deletions(-)