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Commit a7c25759 authored by Markus Mayer's avatar Markus Mayer Committed by Florian Fainelli
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memory: brcmstb: dpfe: wait for DCPU to be ready 



We wait for the DCPU to be ready before sending a command.

Signed-off-by: default avatarMarkus Mayer <mmayer@broadcom.com>
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
parent 6ca5d2ba

drivers/memory/brcmstb_dpfe.c

+12 −0
Original line number Diff line number Diff line
@@ -304,6 +304,18 @@ static int __send_command(struct private_data *priv, unsigned int cmd, 


	mutex_lock(&priv->lock);



	/* Wait for DCPU to become ready */

	for (i = 0; i < DELAY_LOOP_MAX; i++) {

		resp = readl_relaxed(regs + REG_TO_HOST_MBOX);

		if (resp == 0)

			break;

		msleep(1);

	}

	if (resp != 0) {

		mutex_unlock(&priv->lock);

		return -ETIMEDOUT;

	}



	/* Write command and arguments to message area */

	for (i = 0; i < MSG_FIELD_MAX; i++)

		writel_relaxed(msg[i], regs + DCPU_MSG_RAM(i));