C++ OMAP_MMC_WRITE函数代码示例

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本文整理汇总了C++中OMAP_MMC_WRITE函数的典型用法代码示例。如果您正苦于以下问题：C++ OMAP_MMC_WRITE函数的具体用法？C++ OMAP_MMC_WRITE怎么用？C++ OMAP_MMC_WRITE使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了OMAP_MMC_WRITE函数的13个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: mmc_omap_send_abort

static void
mmc_omap_send_abort(struct mmc_omap_host *host, int maxloops)
{
	struct mmc_omap_slot *slot = host->current_slot;
	unsigned int restarts, passes, timeout;
	u16 stat = 0;

	/* Sending abort takes 80 clocks. Have some extra and round up */
	timeout = (120*1000000 + slot->fclk_freq - 1)/slot->fclk_freq;
	restarts = 0;
	while (restarts < maxloops) {
		OMAP_MMC_WRITE(host, STAT, 0xFFFF);
		OMAP_MMC_WRITE(host, CMD, (3 << 12) | (1 << 7));

		passes = 0;
		while (passes < timeout) {
			stat = OMAP_MMC_READ(host, STAT);
			if (stat & OMAP_MMC_STAT_END_OF_CMD)
				goto out;
			udelay(1);
			passes++;
		}

		restarts++;
	}
out:
	OMAP_MMC_WRITE(host, STAT, stat);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:28，代码来源:omap.c

示例2: set_cmd_timeout

static inline void set_cmd_timeout(struct mmc_omap_host *host, struct mmc_request *req)
{
	u16 reg;

	reg = OMAP_MMC_READ(host, SDIO);
	reg &= ~(1 << 5);
	OMAP_MMC_WRITE(host, SDIO, reg);
	/* Set maximum timeout */
	OMAP_MMC_WRITE(host, CTO, 0xff);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:10，代码来源:omap.c

示例3: set_data_timeout

static inline void set_data_timeout(struct mmc_omap_host *host, struct mmc_request *req)
{
	unsigned int timeout, cycle_ns;
	u16 reg;

	cycle_ns = 1000000000 / host->current_slot->fclk_freq;
	timeout = req->data->timeout_ns / cycle_ns;
	timeout += req->data->timeout_clks;

	/* Check if we need to use timeout multiplier register */
	reg = OMAP_MMC_READ(host, SDIO);
	if (timeout > 0xffff) {
		reg |= (1 << 5);
		timeout /= 1024;
	} else
		reg &= ~(1 << 5);
	OMAP_MMC_WRITE(host, SDIO, reg);
	OMAP_MMC_WRITE(host, DTO, timeout);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:19，代码来源:omap.c

示例4: mmc_omap_select_slot

static void mmc_omap_select_slot(struct mmc_omap_slot *slot, int claimed)
{
	struct mmc_omap_host *host = slot->host;
	unsigned long flags;

	if (claimed)
		goto no_claim;
	spin_lock_irqsave(&host->slot_lock, flags);
	while (host->mmc != NULL) {
		spin_unlock_irqrestore(&host->slot_lock, flags);
		wait_event(host->slot_wq, host->mmc == NULL);
		spin_lock_irqsave(&host->slot_lock, flags);
	}
	host->mmc = slot->mmc;
	spin_unlock_irqrestore(&host->slot_lock, flags);
no_claim:
	del_timer(&host->clk_timer);
	if (host->current_slot != slot || !claimed)
		mmc_omap_fclk_offdelay(host->current_slot);

	if (host->current_slot != slot) {
		OMAP_MMC_WRITE(host, CON, slot->saved_con & 0xFC00);
		if (host->pdata->switch_slot != NULL)
			host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id);
		host->current_slot = slot;
	}

	if (claimed) {
		mmc_omap_fclk_enable(host, 1);

		/* Doing the dummy read here seems to work around some bug
		 * at least in OMAP24xx silicon where the command would not
		 * start after writing the CMD register. Sigh. */
		OMAP_MMC_READ(host, CON);

		OMAP_MMC_WRITE(host, CON, slot->saved_con);
	} else
		mmc_omap_fclk_enable(host, 0);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:39，代码来源:omap.c

示例5: mmc_omap_set_power

static void mmc_omap_set_power(struct mmc_omap_slot *slot, int power_on,
				int vdd)
{
	struct mmc_omap_host *host;

	host = slot->host;

	if (slot->pdata->set_power != NULL)
		slot->pdata->set_power(mmc_dev(slot->mmc), slot->id, power_on,
					vdd);
	if (mmc_omap2()) {
		u16 w;

		if (power_on) {
			w = OMAP_MMC_READ(host, CON);
			OMAP_MMC_WRITE(host, CON, w | (1 << 11));
		} else {
			w = OMAP_MMC_READ(host, CON);
			OMAP_MMC_WRITE(host, CON, w & ~(1 << 11));
		}
	}
}

开发者ID:7799，项目名称:linux，代码行数:22，代码来源:omap.c

示例6: mmc_omap_cmd_timer

static void
mmc_omap_cmd_timer(unsigned long data)
{
	struct mmc_omap_host *host = (struct mmc_omap_host *) data;
	unsigned long flags;

	spin_lock_irqsave(&host->slot_lock, flags);
	if (host->cmd != NULL && !host->abort) {
		OMAP_MMC_WRITE(host, IE, 0);
		disable_irq(host->irq);
		host->abort = 1;
		schedule_work(&host->cmd_abort_work);
	}
	spin_unlock_irqrestore(&host->slot_lock, flags);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:15，代码来源:omap.c

示例7: mmc_omap_select_slot

static void mmc_omap_select_slot(struct mmc_omap_slot *slot, int claimed)
{
	struct mmc_omap_host *host = slot->host;
	unsigned long flags;

	if (claimed)
		goto no_claim;
	spin_lock_irqsave(&host->slot_lock, flags);
	while (host->mmc != NULL) {
		spin_unlock_irqrestore(&host->slot_lock, flags);
		wait_event(host->slot_wq, host->mmc == NULL);
		spin_lock_irqsave(&host->slot_lock, flags);
	}
	host->mmc = slot->mmc;
	spin_unlock_irqrestore(&host->slot_lock, flags);
no_claim:
	del_timer(&host->clk_timer);
	if (host->current_slot != slot || !claimed)
		mmc_omap_fclk_offdelay(host->current_slot);

	if (host->current_slot != slot) {
		OMAP_MMC_WRITE(host, CON, slot->saved_con & 0xFC00);
		if (host->pdata->switch_slot != NULL)
			host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id);
		host->current_slot = slot;
	}

	if (claimed) {
		mmc_omap_fclk_enable(host, 1);

		OMAP_MMC_READ(host, CON);

		OMAP_MMC_WRITE(host, CON, slot->saved_con);
	} else
		mmc_omap_fclk_enable(host, 0);
}

开发者ID:3sOx，项目名称:asuswrt-merlin，代码行数:36，代码来源:omap.c

示例8: mmc_omap_prepare_dma

/* Prepare to transfer the next segment of a scatterlist */
static void
mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
{
	int dma_ch = host->dma_ch;
	unsigned long data_addr;
	u16 buf, frame;
	u32 count;
	struct scatterlist *sg = &data->sg[host->sg_idx];
	int src_port = 0;
	int dst_port = 0;
	int sync_dev = 0;

	data_addr = host->phys_base + OMAP_MMC_REG_DATA;
	frame = data->blksz;
	count = sg_dma_len(sg);

	if ((data->blocks == 1) && (count > data->blksz))
		count = frame;

	host->dma_len = count;

	/* FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx and 24xx.
	 * Use 16 or 32 word frames when the blocksize is at least that large.
	 * Blocksize is usually 512 bytes; but not for some SD reads.
	 */
	if (cpu_is_omap15xx() && frame > 32)
		frame = 32;
	else if (frame > 64)
		frame = 64;
	count /= frame;
	frame >>= 1;

	if (!(data->flags & MMC_DATA_WRITE)) {
		buf = 0x800f | ((frame - 1) << 8);

		if (cpu_class_is_omap1()) {
			src_port = OMAP_DMA_PORT_TIPB;
			dst_port = OMAP_DMA_PORT_EMIFF;
		}
		if (cpu_is_omap24xx())
			sync_dev = OMAP24XX_DMA_MMC1_RX;

		omap_set_dma_src_params(dma_ch, src_port,
					OMAP_DMA_AMODE_CONSTANT,
					data_addr, 0, 0);
		omap_set_dma_dest_params(dma_ch, dst_port,
					 OMAP_DMA_AMODE_POST_INC,
					 sg_dma_address(sg), 0, 0);
		omap_set_dma_dest_data_pack(dma_ch, 1);
		omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
	} else {
		buf = 0x0f80 | ((frame - 1) << 0);

		if (cpu_class_is_omap1()) {
			src_port = OMAP_DMA_PORT_EMIFF;
			dst_port = OMAP_DMA_PORT_TIPB;
		}
		if (cpu_is_omap24xx())
			sync_dev = OMAP24XX_DMA_MMC1_TX;

		omap_set_dma_dest_params(dma_ch, dst_port,
					 OMAP_DMA_AMODE_CONSTANT,
					 data_addr, 0, 0);
		omap_set_dma_src_params(dma_ch, src_port,
					OMAP_DMA_AMODE_POST_INC,
					sg_dma_address(sg), 0, 0);
		omap_set_dma_src_data_pack(dma_ch, 1);
		omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
	}

	/* Max limit for DMA frame count is 0xffff */
	BUG_ON(count > 0xffff);

	OMAP_MMC_WRITE(host, BUF, buf);
	omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
				     frame, count, OMAP_DMA_SYNC_FRAME,
				     sync_dev, 0);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:79，代码来源:omap.c

示例9: mmc_omap_irq

static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
{
	struct mmc_omap_host * host = (struct mmc_omap_host *)dev_id;
	u16 status;
	int end_command;
	int end_transfer;
	int transfer_error, cmd_error;

	if (host->cmd == NULL && host->data == NULL) {
		status = OMAP_MMC_READ(host, STAT);
		dev_info(mmc_dev(host->slots[0]->mmc),
			 "Spurious IRQ 0x%04x\n", status);
		if (status != 0) {
			OMAP_MMC_WRITE(host, STAT, status);
			OMAP_MMC_WRITE(host, IE, 0);
		}
		return IRQ_HANDLED;
	}

	end_command = 0;
	end_transfer = 0;
	transfer_error = 0;
	cmd_error = 0;

	while ((status = OMAP_MMC_READ(host, STAT)) != 0) {
		int cmd;

		OMAP_MMC_WRITE(host, STAT, status);
		if (host->cmd != NULL)
			cmd = host->cmd->opcode;
		else
			cmd = -1;
#ifdef CONFIG_MMC_DEBUG
		dev_dbg(mmc_dev(host->mmc), "MMC IRQ %04x (CMD %d): ",
			status, cmd);
		mmc_omap_report_irq(status);
		printk("\n");
#endif
		if (host->total_bytes_left) {
			if ((status & OMAP_MMC_STAT_A_FULL) ||
			    (status & OMAP_MMC_STAT_END_OF_DATA))
				mmc_omap_xfer_data(host, 0);
			if (status & OMAP_MMC_STAT_A_EMPTY)
				mmc_omap_xfer_data(host, 1);
		}

		if (status & OMAP_MMC_STAT_END_OF_DATA)
			end_transfer = 1;

		if (status & OMAP_MMC_STAT_DATA_TOUT) {
			dev_dbg(mmc_dev(host->mmc), "data timeout (CMD%d)\n",
				cmd);
			if (host->data) {
				host->data->error = -ETIMEDOUT;
				transfer_error = 1;
			}
		}

		if (status & OMAP_MMC_STAT_DATA_CRC) {
			if (host->data) {
				host->data->error = -EILSEQ;
				dev_dbg(mmc_dev(host->mmc),
					 "data CRC error, bytes left %d\n",
					host->total_bytes_left);
				transfer_error = 1;
			} else {
				dev_dbg(mmc_dev(host->mmc), "data CRC error\n");
			}
		}

		if (status & OMAP_MMC_STAT_CMD_TOUT) {
			/* Timeouts are routine with some commands */
			if (host->cmd) {
				struct mmc_omap_slot *slot =
					host->current_slot;
				if (slot == NULL ||
				    !mmc_omap_cover_is_open(slot))
					dev_err(mmc_dev(host->mmc),
						"command timeout (CMD%d)\n",
						cmd);
				host->cmd->error = -ETIMEDOUT;
				end_command = 1;
				cmd_error = 1;
			}
		}

		if (status & OMAP_MMC_STAT_CMD_CRC) {
			if (host->cmd) {
				dev_err(mmc_dev(host->mmc),
					"command CRC error (CMD%d, arg 0x%08x)\n",
					cmd, host->cmd->arg);
				host->cmd->error = -EILSEQ;
				end_command = 1;
				cmd_error = 1;
			} else
				dev_err(mmc_dev(host->mmc),
					"command CRC error without cmd?\n");
		}

		if (status & OMAP_MMC_STAT_CARD_ERR) {
//.........这里部分代码省略.........

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:101，代码来源:omap.c

示例10: mmc_omap_start_command

static void
mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
{
	u32 cmdreg;
	u32 resptype;
	u32 cmdtype;

	host->cmd = cmd;

	resptype = 0;
	cmdtype = 0;

	/* Our hardware needs to know exact type */
	switch (mmc_resp_type(cmd)) {
	case MMC_RSP_NONE:
		break;
	case MMC_RSP_R1:
	case MMC_RSP_R1B:
		/* resp 1, 1b, 6, 7 */
		resptype = 1;
		break;
	case MMC_RSP_R2:
		resptype = 2;
		break;
	case MMC_RSP_R3:
		resptype = 3;
		break;
	default:
		dev_err(mmc_dev(host->mmc), "Invalid response type: %04x\n", mmc_resp_type(cmd));
		break;
	}

	if (mmc_cmd_type(cmd) == MMC_CMD_ADTC) {
		cmdtype = OMAP_MMC_CMDTYPE_ADTC;
	} else if (mmc_cmd_type(cmd) == MMC_CMD_BC) {
		cmdtype = OMAP_MMC_CMDTYPE_BC;
	} else if (mmc_cmd_type(cmd) == MMC_CMD_BCR) {
		cmdtype = OMAP_MMC_CMDTYPE_BCR;
	} else {
		cmdtype = OMAP_MMC_CMDTYPE_AC;
	}

	cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);

	if (host->current_slot->bus_mode == MMC_BUSMODE_OPENDRAIN)
		cmdreg |= 1 << 6;

	if (cmd->flags & MMC_RSP_BUSY)
		cmdreg |= 1 << 11;

	if (host->data && !(host->data->flags & MMC_DATA_WRITE))
		cmdreg |= 1 << 15;

	mod_timer(&host->cmd_abort_timer, jiffies + HZ/2);

	OMAP_MMC_WRITE(host, CTO, 200);
	OMAP_MMC_WRITE(host, ARGL, cmd->arg & 0xffff);
	OMAP_MMC_WRITE(host, ARGH, cmd->arg >> 16);
	OMAP_MMC_WRITE(host, IE,
		       OMAP_MMC_STAT_A_EMPTY    | OMAP_MMC_STAT_A_FULL    |
		       OMAP_MMC_STAT_CMD_CRC    | OMAP_MMC_STAT_CMD_TOUT  |
		       OMAP_MMC_STAT_DATA_CRC   | OMAP_MMC_STAT_DATA_TOUT |
		       OMAP_MMC_STAT_END_OF_CMD | OMAP_MMC_STAT_CARD_ERR  |
		       OMAP_MMC_STAT_END_OF_DATA);
	OMAP_MMC_WRITE(host, CMD, cmdreg);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:66，代码来源:omap.c

示例11: mmc_omap_set_ios

static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
	struct mmc_omap_slot *slot = mmc_priv(mmc);
	struct mmc_omap_host *host = slot->host;
	int i, dsor;
	int clk_enabled;

	mmc_omap_select_slot(slot, 0);

	dsor = mmc_omap_calc_divisor(mmc, ios);

	if (ios->vdd != slot->vdd)
		slot->vdd = ios->vdd;

	clk_enabled = 0;
	switch (ios->power_mode) {
	case MMC_POWER_OFF:
		mmc_omap_set_power(slot, 0, ios->vdd);
		break;
	case MMC_POWER_UP:
		/* Cannot touch dsor yet, just power up MMC */
		mmc_omap_set_power(slot, 1, ios->vdd);
		goto exit;
	case MMC_POWER_ON:
		mmc_omap_fclk_enable(host, 1);
		clk_enabled = 1;
		dsor |= 1 << 11;
		break;
	}

	if (slot->bus_mode != ios->bus_mode) {
		if (slot->pdata->set_bus_mode != NULL)
			slot->pdata->set_bus_mode(mmc_dev(mmc), slot->id,
						  ios->bus_mode);
		slot->bus_mode = ios->bus_mode;
	}

	/* On insanely high arm_per frequencies something sometimes
	 * goes somehow out of sync, and the POW bit is not being set,
	 * which results in the while loop below getting stuck.
	 * Writing to the CON register twice seems to do the trick. */
	for (i = 0; i < 2; i++)
		OMAP_MMC_WRITE(host, CON, dsor);
	slot->saved_con = dsor;
	if (ios->power_mode == MMC_POWER_ON) {
		/* worst case at 400kHz, 80 cycles makes 200 microsecs */
		int usecs = 250;

		/* Send clock cycles, poll completion */
		OMAP_MMC_WRITE(host, IE, 0);
		OMAP_MMC_WRITE(host, STAT, 0xffff);
		OMAP_MMC_WRITE(host, CMD, 1 << 7);
		while (usecs > 0 && (OMAP_MMC_READ(host, STAT) & 1) == 0) {
			udelay(1);
			usecs--;
		}
		OMAP_MMC_WRITE(host, STAT, 1);
	}

exit:
	mmc_omap_release_slot(slot, clk_enabled);
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:62，代码来源:omap.c

示例12: mmc_omap_prepare_data

static void
mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
{
	struct mmc_data *data = req->data;
	int i, use_dma, block_size;
	unsigned sg_len;

	host->data = data;
	if (data == NULL) {
		OMAP_MMC_WRITE(host, BLEN, 0);
		OMAP_MMC_WRITE(host, NBLK, 0);
		OMAP_MMC_WRITE(host, BUF, 0);
		host->dma_in_use = 0;
		set_cmd_timeout(host, req);
		return;
	}

	block_size = data->blksz;

	OMAP_MMC_WRITE(host, NBLK, data->blocks - 1);
	OMAP_MMC_WRITE(host, BLEN, block_size - 1);
	set_data_timeout(host, req);

	/* cope with calling layer confusion; it issues "single
	 * block" writes using multi-block scatterlists.
	 */
	sg_len = (data->blocks == 1) ? 1 : data->sg_len;

	/* Only do DMA for entire blocks */
	use_dma = host->use_dma;
	if (use_dma) {
		for (i = 0; i < sg_len; i++) {
			if ((data->sg[i].length % block_size) != 0) {
				use_dma = 0;
				break;
			}
		}
	}

	host->sg_idx = 0;
	if (use_dma) {
		if (mmc_omap_get_dma_channel(host, data) == 0) {
			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;

			host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
						sg_len, dma_data_dir);
			host->total_bytes_left = 0;
			mmc_omap_prepare_dma(host, req->data);
			host->brs_received = 0;
			host->dma_done = 0;
			host->dma_in_use = 1;
		} else
			use_dma = 0;
	}

	/* Revert to PIO? */
	if (!use_dma) {
		OMAP_MMC_WRITE(host, BUF, 0x1f1f);
		host->total_bytes_left = data->blocks * block_size;
		host->sg_len = sg_len;
		mmc_omap_sg_to_buf(host);
		host->dma_in_use = 0;
	}
}

开发者ID:A2109devs，项目名称:lenovo_a2109a_kernel，代码行数:69，代码来源:omap.c

示例13: mmc_omap_prepare_data

static void
mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
{
	struct mmc_data *data = req->data;
	int i, use_dma, block_size;
	unsigned sg_len;

	host->data = data;
	if (data == NULL) {
		OMAP_MMC_WRITE(host, BLEN, 0);
		OMAP_MMC_WRITE(host, NBLK, 0);
		OMAP_MMC_WRITE(host, BUF, 0);
		host->dma_in_use = 0;
		set_cmd_timeout(host, req);
		return;
	}

	block_size = data->blksz;

	OMAP_MMC_WRITE(host, NBLK, data->blocks - 1);
	OMAP_MMC_WRITE(host, BLEN, block_size - 1);
	set_data_timeout(host, req);

	/* cope with calling layer confusion; it issues "single
	 * block" writes using multi-block scatterlists.
	 */
	sg_len = (data->blocks == 1) ? 1 : data->sg_len;

	/* Only do DMA for entire blocks */
	use_dma = host->use_dma;
	if (use_dma) {
		for (i = 0; i < sg_len; i++) {
			if ((data->sg[i].length % block_size) != 0) {
				use_dma = 0;
				break;
			}
		}
	}

	host->sg_idx = 0;
	if (use_dma) {
		enum dma_data_direction dma_data_dir;
		struct dma_async_tx_descriptor *tx;
		struct dma_chan *c;
		u32 burst, *bp;
		u16 buf;

		/*
		 * FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx
		 * and 24xx. Use 16 or 32 word frames when the
		 * blocksize is at least that large. Blocksize is
		 * usually 512 bytes; but not for some SD reads.
		 */
		burst = cpu_is_omap15xx() ? 32 : 64;
		if (burst > data->blksz)
			burst = data->blksz;

		burst >>= 1;

		if (data->flags & MMC_DATA_WRITE) {
			c = host->dma_tx;
			bp = &host->dma_tx_burst;
			buf = 0x0f80 | (burst - 1) << 0;
			dma_data_dir = DMA_TO_DEVICE;
		} else {
			c = host->dma_rx;
			bp = &host->dma_rx_burst;
			buf = 0x800f | (burst - 1) << 8;
			dma_data_dir = DMA_FROM_DEVICE;
		}

		if (!c)
			goto use_pio;

		/* Only reconfigure if we have a different burst size */
		if (*bp != burst) {
			struct dma_slave_config cfg;

			cfg.src_addr = host->phys_base + OMAP_MMC_REG(host, DATA);
			cfg.dst_addr = host->phys_base + OMAP_MMC_REG(host, DATA);
			cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
			cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
			cfg.src_maxburst = burst;
			cfg.dst_maxburst = burst;

			if (dmaengine_slave_config(c, &cfg))
				goto use_pio;

			*bp = burst;
		}

		host->sg_len = dma_map_sg(c->device->dev, data->sg, sg_len,
					  dma_data_dir);
		if (host->sg_len == 0)
			goto use_pio;

		tx = dmaengine_prep_slave_sg(c, data->sg, host->sg_len,
			data->flags & MMC_DATA_WRITE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
			DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
		if (!tx)
//.........这里部分代码省略.........

开发者ID:AllenDou，项目名称:linux，代码行数:101，代码来源:omap.c

注：本文中的OMAP_MMC_WRITE函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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C++ OMAP_MMC_WRITE函数代码示例

示例1: mmc_omap_send_abort

示例2: set_cmd_timeout

示例3: set_data_timeout

示例4: mmc_omap_select_slot

示例5: mmc_omap_set_power

示例6: mmc_omap_cmd_timer

示例7: mmc_omap_select_slot

示例8: mmc_omap_prepare_dma

示例9: mmc_omap_irq

示例10: mmc_omap_start_command

示例11: mmc_omap_set_ios

示例12: mmc_omap_prepare_data

示例13: mmc_omap_prepare_data

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