[PATCH 2/3] mx51: efikamx: add otg support

[Uwe Kleine-König]

Hi Amit,

On Thu, Oct 07, 2010 at 03:58:25AM +0300, Amit Kucheria wrote:
> Ethernet hangs off OTG
> 
> Signed-off-by: Amit Kucheria <amit.kucheria at linaro.org>
> ---
>  arch/arm/mach-mx5/board-mx51_efikamx.c |   30 ++++++++++++++++++++++++++++++
>  1 files changed, 30 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-mx5/board-mx51_efikamx.c b/arch/arm/mach-mx5/board-mx51_efikamx.c
> index 4c921fc..b00502a 100644
> --- a/arch/arm/mach-mx5/board-mx51_efikamx.c
> +++ b/arch/arm/mach-mx5/board-mx51_efikamx.c
> @@ -37,6 +37,8 @@
>  #include "devices-imx51.h"
>  #include "devices.h"
>  
> +#define	MX51_USB_PLL_DIV_24_MHZ	0x01
> +
>  static struct pad_desc mx51efikamx_pads[] = {
>  	/* UART1 */
>  	MX51_PAD_UART1_RXD__UART1_RXD,
> @@ -63,10 +65,38 @@ static inline void mxc_init_imx_uart(void)
>  }
>  #endif /* SERIAL_IMX */
>  
> +/* This function is board specific as the bit mask for the plldiv will also
> + * be different for other Freescale SoCs, thus a common bitmask is not
> + * possible and cannot get place in /plat-mxc/ehci.c.
But maybe a function that removes the boilerplate.  Such that is just
becomes (say):

	imxXX_initialize_otg_port(MX51_USB_PLL_DIV_24_MHZ, maybe, some, more, parameters);

> + */
> +static int initialize_otg_port(struct platform_device *pdev)
> +{
> +	u32 v;
> +	void __iomem *usb_base;
> +	void __iomem *usbother_base;
> +	usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
ioremap can fail.

> +	usbother_base = (void __iomem *)(usb_base + MX5_USBOTHER_REGS_OFFSET);
do you need this cast?

> +
> +	/* Set the PHY clock to 19.2MHz */
> +	v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
> +	v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
> +	v |= MX51_USB_PLL_DIV_24_MHZ;
> +	__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
> +	iounmap(usb_base);
> +	return 0;
> +}
> +
> +static struct mxc_usbh_platform_data dr_utmi_config = {
> +	.init   = initialize_otg_port,
> +	.portsc = MXC_EHCI_UTMI_16BIT,
> +	.flags  = MXC_EHCI_INTERNAL_PHY,
> +};
> +
>  static void __init mxc_board_init(void)
>  {
>  	mxc_iomux_v3_setup_multiple_pads(mx51efikamx_pads,
>  					ARRAY_SIZE(mx51efikamx_pads));
> +	mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
>  	mxc_init_imx_uart();
>  }
>  
Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |