[U-Boot] [PATCH v4 5/5] usb: lpc32xx: add host USB driver

[Marek Vasut]

On Tuesday, August 04, 2015 at 11:04:42 PM, slemieux.tyco at gmail.com wrote:
> From: Sylvain Lemieux <slemieux at tycoint.com>
> 
> Incorporate USB driver from legacy LPCLinux NXP BSP.
> The files taken from the legacy patch are:
> - lpc32xx USB driver
> - lpc3250 header file USB registers definition.
> 
> The legacy driver was updated and clean-up as part
> of the integration with the latest u-boot.
> 
> Signed-off-by: Sylvain Lemieux <slemieux at tycoint.com>
> ---

Hi!

> +static int wait_for_bit(void *reg, const uint32_t mask, bool set)
> +{
> +	unsigned int timeout = 1000000;
> +	uint32_t val;
> +
> +	while (--timeout) {

Where did the get_timer() stuff disappear ? :'-(

> +		val = readl(reg);
> +		if (!set)
> +			val = ~val;
> +
> +		if ((val & mask) == mask)
> +			return 0;
> +
> +		udelay(1);
> +	}
> +
> +	debug("%s: Timeout (reg=%p mask=%08x wait_set=%i)\n",
> +	      __func__, reg, mask, set);
> +
> +	return -ETIMEDOUT;
> +}

[...]

> +static int usbpll_setup(void)
> +{
> +	uint32_t ret;

u32, please fix all around.

> +	/* make sure clocks are disabled */
> +	clrbits_le32(&clk_pwr->usb_ctrl,
> +		     CLK_USBCTRL_CLK_EN1 | CLK_USBCTRL_CLK_EN2);
> +
> +	/* start PLL clock input */
> +	setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_CLK_EN1);
> +
> +	/* Setup PLL. */
> +	setbits_le32(&clk_pwr->usb_ctrl,
> +		     CLK_USBCTRL_FDBK_PLUS1(192 - 1));
> +	setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_POSTDIV_2POW(0x01));
> +	setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_PLL_PWRUP);
> +
> +	ret = wait_for_bit(&clk_pwr->usb_ctrl, CLK_USBCTRL_PLL_STS, 1);
> +	if (ret)
> +		return -1;
> +
> +	/* enable PLL output */
> +	setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_CLK_EN2);
> +
> +	return 0;
> +}

[...]

> +	ret = wait_for_bit(&otg->otg_clk_sts, mask, 1);
> +	if (ret)
> +		return -1;

return ret; should be just find in these cases.

> +	setbits_le32(&otg->otg_sts_ctrl, OTG_HOST_EN);
> +	isp1301_set_value(ISP1301_I2C_OTG_CONTROL_1_SET, OTG1_VBUS_DRV);
> +
> +	return 0;
> +}
> +
> +int usb_cpu_stop(void)
> +{
> +	/* vbus off */
> +	isp1301_set_value(ISP1301_I2C_OTG_CONTROL_1_SET, OTG1_VBUS_DRV);
> +
> +	clrbits_le32(&otg->otg_sts_ctrl, OTG_HOST_EN);
> +
> +	clrbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_HCLK_EN);
> +
> +	return 0;
> +}
> +
> +int usb_cpu_init_fail(void)
> +{
> +	return usb_cpu_stop();
> +}