C++ (Cpp) SSBI_FSM_CMD_WRITE示例

示例#1

文件： ssbi.c 项目： 404992361/mi1_kernel

static int
msm_ssbi_write_bytes(struct msm_ssbi *ssbi, u16 addr, u8 *buf, int len)
{
	int ret = 0;

	if (ssbi->controller_type == MSM_SBI_CTRL_SSBI2) {
		u32 mode2 = ssbi_readl(ssbi, SSBI2_MODE2);
		mode2 = SET_SSBI_MODE2_REG_ADDR_15_8(mode2, addr);
		ssbi_writel(ssbi, mode2, SSBI2_MODE2);
	}

	while (len) {
		ret = ssbi_wait_mask(ssbi, SSBI_STATUS_READY, 0);
		if (ret)
			goto err;

		if (ssbi->controller_type == FSM_SBI_CTRL_SSBI)
			ssbi_writel(ssbi, SSBI_FSM_CMD_WRITE(addr, *buf),
				SSBI2_CMD);
		else
			ssbi_writel(ssbi, ((addr & 0xff) << 16) | *buf,
				SSBI2_CMD);

		ret = ssbi_wait_mask(ssbi, 0, SSBI_STATUS_MCHN_BUSY);
		if (ret)
			goto err;
		buf++;
		len--;
	}

err:
	return ret;
}

示例#2

static int
i2c_ssbi_write_bytes(struct i2c_ssbi_dev *ssbi, struct i2c_msg *msg)
{
	int ret = 0;
	u8 *buf = msg->buf;
	u16 len = msg->len;
	u16 addr = msg->addr;

	if (ssbi->controller_type == MSM_SBI_CTRL_SSBI2) {
		u32 mode2 = readl(ssbi->base + SSBI2_MODE2);
		writel(SSBI_MODE2_REG_ADDR_15_8(mode2, addr),
				ssbi->base + SSBI2_MODE2);
	}

	while (len) {
		ret = i2c_ssbi_poll_for_device_ready(ssbi);
		if (ret)
			goto write_failed;

		if (ssbi->controller_type == FSM_SBI_CTRL_SSBI)
			writel(SSBI_FSM_CMD_WRITE(addr, *buf++),
				ssbi->base + SSBI2_CMD);
		else
			writel(SSBI_CMD_WRITE(addr, *buf++),
				ssbi->base + SSBI2_CMD);

		ret = i2c_ssbi_poll_for_transfer_completed(ssbi);
		if (ret)
			goto write_failed;

		len--;
	}

write_failed:
	return ret;
}