diff options
Diffstat (limited to 'drivers/usb/musb/omap3.c')
| -rw-r--r-- | drivers/usb/musb/omap3.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/usb/musb/omap3.c b/drivers/usb/musb/omap3.c new file mode 100644 index 000000000..ea98c3cac --- /dev/null +++ b/drivers/usb/musb/omap3.c @@ -0,0 +1,134 @@ +/* + * Copyright (c) 2009 Wind River Systems, Inc. + * Tom Rix <Tom.Rix@windriver.com> + * + * This is file is based on + * repository git.gitorious.org/u-boot-omap3/mainline.git, + * branch omap3-dev-usb, file drivers/usb/host/omap3530_usb.c + * + * This is the unique part of its copyright : + * + * ------------------------------------------------------------------------ + * + * Copyright (c) 2009 Texas Instruments + * + * ------------------------------------------------------------------------ + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <twl4030.h> +#include "omap3.h" + +static int platform_needs_initialization = 1; + +struct musb_config musb_cfg = { + (struct musb_regs *)MENTOR_USB0_BASE, + OMAP3_USB_TIMEOUT, + 0 +}; + +/* + * OMAP3 USB OTG registers. + */ +struct omap3_otg_regs { + u32 revision; + u32 sysconfig; + u32 sysstatus; + u32 interfsel; + u32 simenable; + u32 forcestdby; +}; + +static struct omap3_otg_regs *otg; + +#define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE 0x2000 +#define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE 0x1000 +#define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE 0x0010 +#define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE 0x0008 +#define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP 0x0004 +#define OMAP3_OTG_SYSCONFIG_SOFTRESET 0x0002 +#define OMAP3_OTG_SYSCONFIG_AUTOIDLE 0x0001 + +#define OMAP3_OTG_SYSSTATUS_RESETDONE 0x0001 + +#define OMAP3_OTG_INTERFSEL_OMAP 0x0001 + +#define OMAP3_OTG_FORCESTDBY_STANDBY 0x0001 + + +#ifdef DEBUG_MUSB_OMAP3 +static void musb_db_otg_regs(void) +{ + u32 l; + l = readl(&otg->revision); + serial_printf("OTG_REVISION 0x%x\n", l); + l = readl(&otg->sysconfig); + serial_printf("OTG_SYSCONFIG 0x%x\n", l); + l = readl(&otg->sysstatus); + serial_printf("OTG_SYSSTATUS 0x%x\n", l); + l = readl(&otg->interfsel); + serial_printf("OTG_INTERFSEL 0x%x\n", l); + l = readl(&otg->forcestdby); + serial_printf("OTG_FORCESTDBY 0x%x\n", l); +} +#endif + +int musb_platform_init(void) +{ + int ret = -1; + + if (platform_needs_initialization) { + u32 stdby; + + /* + * OMAP3EVM uses ISP1504 phy and so + * twl4030 related init is not required. + */ +#ifdef CONFIG_TWL4030_USB + if (twl4030_usb_ulpi_init()) { + serial_printf("ERROR: %s Could not initialize PHY\n", + __PRETTY_FUNCTION__); + goto end; + } +#endif + otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE; + + /* Set OTG to always be on */ + writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE | + OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig); + + /* Set the interface */ + writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel); + + /* Clear force standby */ + stdby = readl(&otg->forcestdby); + stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY; + writel(stdby, &otg->forcestdby); + + platform_needs_initialization = 0; + } + + ret = platform_needs_initialization; +end: + return ret; + +} + +void musb_platform_deinit(void) +{ + /* noop */ +} |