C++ (Cpp) imx_get_fecclk Examples

Example #1

File: fec_mxc.c Project: lipro-compulab/cl-som-imx6ul-u-boot

static void fec_mii_setspeed(struct ethernet_regs *eth)
{
	/*
	 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
	 * and do not drop the Preamble.
	 *
	 * The i.MX28 and i.MX6 types have another field in the MSCR (aka
	 * MII_SPEED) register that defines the MDIO output hold time. Earlier
	 * versions are RAZ there, so just ignore the difference and write the
	 * register always.
	 * The minimal hold time according to IEE802.3 (clause 22) is 10 ns.
	 * HOLDTIME + 1 is the number of clk cycles the fec is holding the
	 * output.
	 * The HOLDTIME bitfield takes values between 0 and 7 (inclusive).
	 * Given that ceil(clkrate / 5000000) <= 64, the calculation for
	 * holdtime cannot result in a value greater than 3.
	 */
	u32 pclk = imx_get_fecclk();
	u32 speed = DIV_ROUND_UP(pclk, 5000000);
	u32 hold = DIV_ROUND_UP(pclk, 100000000) - 1;
#ifdef FEC_QUIRK_ENET_MAC
	speed--;
#endif
	writel(speed << 1 | hold << 8, &eth->mii_speed);
	debug("%s: mii_speed %08x\n", __func__, readl(&eth->mii_speed));
}

Example #2

File: fec_mxc.c Project: KunYi/uboot-samx6i

static void fec_mii_setspeed(struct ethernet_regs *eth)
{
	/*
	 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
	 * and do not drop the Preamble.
	 */
	register u32 speed = DIV_ROUND_UP(imx_get_fecclk(), 5000000);
	register u32 holdtime = DIV_ROUND_UP(imx_get_fecclk(), 100000000) - 1;
#ifdef FEC_QUIRK_ENET_MAC
	speed--;
#endif
	speed <<= 1;
	holdtime <<= 8;
	writel(speed | holdtime, &eth->mii_speed);
	debug("%s: mii_speed %08x\n", __func__, readl(&eth->mii_speed));
}

Example #3

File: fec_mxc.c Project: vorlonofportland/u-boot-imx6

static void fec_mii_setspeed(struct ethernet_regs *eth)
{
	/*
	 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
	 * and do not drop the Preamble.
	 */
	writel((((imx_get_fecclk() / 1000000) + 2) / 5) << 1,
			&eth->mii_speed);
	debug("%s: mii_speed %08x\n", __func__, readl(&eth->mii_speed));
}

Example #4

File: fec_mxc.c Project: Apaisal/u-boot

static void fec_mii_setspeed(struct fec_priv *fec)
{
	/*
	 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
	 * and do not drop the Preamble.
	 */
	writel((((imx_get_fecclk() / 1000000) + 2) / 5) << 1,
			&fec->eth->mii_speed);
	debug("fec_init: mii_speed %08x\n",
			readl(&fec->eth->mii_speed));
}

Example #5

File: fec_imx.c Project: rjarzmik/barebox

static inline unsigned long fec_clk_get_rate(struct fec_priv *fec)
{
	return imx_get_fecclk();
}