[U-Boot] [v2 1/4] USB: Armada100: Add UTMI PHY interface driver

[Marek Vasut]

> This patch adds USB host controller's UTMI PHY interface driver for
> Armada100 SOCs.
> 
> Signed-off-by: Ajay Bhargav <ajay.bhargav at einfochips.com>
> ---
> Changes for v2:
> 	- Fix: enable only required clock in MPMU
> 
>  arch/arm/include/asm/arch-armada100/armada100.h |    8 ++
>  drivers/usb/host/utmi-armada100.c               |   87
> +++++++++++++++++++++++ drivers/usb/host/utmi-armada100.h               | 
>  79 ++++++++++++++++++++ 3 files changed, 174 insertions(+), 0
> deletions(-)
>  create mode 100644 drivers/usb/host/utmi-armada100.c
>  create mode 100644 drivers/usb/host/utmi-armada100.h
> 
> diff --git a/arch/arm/include/asm/arch-armada100/armada100.h
> b/arch/arm/include/asm/arch-armada100/armada100.h index 0ed3a8e..70fba27
> 100644
> --- a/arch/arm/include/asm/arch-armada100/armada100.h
> +++ b/arch/arm/include/asm/arch-armada100/armada100.h
> @@ -43,6 +43,14 @@
>  #define SSP2_APBCLK		0x01
>  #define SSP2_FNCLK		0x02
> 
> +/* USB Clock/reset control bits */
> +#define USB_SPH_AXICLK_EN	0x10
> +#define USB_SPH_AXI_RST		0x02
> +
> +/* MPMU Clocks */
> +#define APB2_26M_EN		(1 << 20)
> +#define AP_26M			(1 << 4)
> +
>  /* Register Base Addresses */
>  #define ARMD1_DRAM_BASE		0xB0000000
>  #define ARMD1_FEC_BASE		0xC0800000
> diff --git a/drivers/usb/host/utmi-armada100.c
> b/drivers/usb/host/utmi-armada100.c new file mode 100644
> index 0000000..1a4d3f2
> --- /dev/null
> +++ b/drivers/usb/host/utmi-armada100.c
> @@ -0,0 +1,87 @@
> +/*
> + * (C) Copyright 2012
> + * eInfochips Ltd. <www.einfochips.com>
> + * Written-by: Ajay Bhargav <ajay.bhargav at einfochips.com>
> + *
> + * (C) Copyright 2009
> + * Marvell Semiconductor <www.marvell.com>
> + *
> + * See file CREDITS for list of people who contributed to this
> + * project.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
> + * MA 02110-1301 USA
> + */
> +
> +#include <common.h>
> +#include <asm/io.h>
> +#include <usb.h>
> +#include <asm/arch/cpu.h>
> +#include <asm/arch/armada100.h>
> +#include "utmi-armada100.h"
> +
> +static void utmi_phy_init(void)
> +{
> +	struct armd1usb_phy_reg *phy_regs =
> +		(struct armd1usb_phy_reg *)UTMI_PHY_BASE;
> +
> +	setbits_le32(&phy_regs->utmi_ctrl, INPKT_DELAY_SOF | PLL_PWR_UP);
> +	udelay(1000);
> +	setbits_le32(&phy_regs->utmi_ctrl, PHY_PWR_UP);
> +
> +	clrbits_le32(&phy_regs->utmi_pll, PLL_FBDIV_MASK | PLL_REFDIV_MASK);
> +	setbits_le32(&phy_regs->utmi_pll, N_DIVIDER << PLL_FBDIV | M_DIVIDER);
> +
> +	setbits_le32(&phy_regs->utmi_tx, PHSEL_VAL << CK60_PHSEL);
> +
> +	/* Calibrate pll */
> +	while ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0)
> +		;

No endless loops please.

> +
> +	udelay(200);
> +	setbits_le32(&phy_regs->utmi_pll, VCOCAL_START);
> +	udelay(400);
> +	clrbits_le32(&phy_regs->utmi_pll, VCOCAL_START);
> +
> +	udelay(200);
> +	setbits_le32(&phy_regs->utmi_tx, RCAL_START);
> +	udelay(400);
> +	clrbits_le32(&phy_regs->utmi_tx, RCAL_START);
> +
> +	while ((readl(&phy_regs->utmi_pll) & PLL_READY) == 0)
> +		;
> +}

DTTO

M