static void goldfish_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
{
struct goldfish_mmc_host *host = mmc_priv(mmc);
WARN_ON(host->mrq != NULL);
host->mrq = req;
goldfish_mmc_prepare_data(host, req);
goldfish_mmc_start_command(host, req->cmd);
/* this is to avoid accidentally being detected as an SDIO card in mmc_attach_sdio() */
if (req->cmd->opcode == SD_IO_SEND_OP_COND &&
req->cmd->flags == (MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR)) {
req->cmd->error = -EINVAL;
}
}
static void
goldfish_mmc_xfer_done(struct goldfish_mmc_host *host, struct mmc_data *data)
{
if (host->dma_in_use) {
enum dma_data_direction dma_data_dir;
if (data->flags & MMC_DATA_WRITE)
dma_data_dir = DMA_TO_DEVICE;
else
dma_data_dir = DMA_FROM_DEVICE;
if (dma_data_dir == DMA_FROM_DEVICE) {
// we don't really have DMA, so we need to copy from our platform driver buffer
uint8_t *dest = (uint8_t *) sg_virt(data->sg);
memcpy(dest, host->virt_base, data->sg->length);
}
host->data->bytes_xfered += data->sg->length;
dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
dma_data_dir);
}
host->data = NULL;
host->sg_len = 0;
/* NOTE: MMC layer will sometimes poll-wait CMD13 next, issuing
* dozens of requests until the card finishes writing data.
* It'd be cheaper to just wait till an EOFB interrupt arrives...
*/
if (!data->stop) {
host->mrq = NULL;
mmc_request_done(host->mmc, data->mrq);
return;
}
goldfish_mmc_start_command(host, data->stop);
}
