diff options
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/Makefile | 1 | ||||
| -rw-r--r-- | drivers/usb/musb/am35x.c | 118 | ||||
| -rw-r--r-- | drivers/usb/musb/am35x.h | 94 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_udc.c | 2 |
4 files changed, 215 insertions, 0 deletions
diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile index 397f5fe..7d23e06 100644 --- a/drivers/usb/musb/Makefile +++ b/drivers/usb/musb/Makefile @@ -31,6 +31,7 @@ COBJS-$(CONFIG_USB_BLACKFIN) += blackfin_usb.o COBJS-$(CONFIG_USB_DAVINCI) += davinci.o COBJS-$(CONFIG_USB_OMAP3) += omap3.o COBJS-$(CONFIG_USB_DA8XX) += da8xx.o +COBJS-$(CONFIG_USB_AM35X) += am35x.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c new file mode 100644 index 0000000..2024940 --- /dev/null +++ b/drivers/usb/musb/am35x.c @@ -0,0 +1,118 @@ +/* + * am35x.c - TI's AM35x platform specific usb wrapper functions. + * + * Author: Ajay Kumar Gupta <ajay.gupta@ti.com> + * + * Based on drivers/usb/musb/da8xx.c + * + * Copyright (c) 2010 Texas Instruments Incorporated + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <common.h> + +#include "am35x.h" + +/* MUSB platform configuration */ +struct musb_config musb_cfg = { + .regs = (struct musb_regs *)AM35X_USB_OTG_CORE_BASE, + .timeout = AM35X_USB_OTG_TIMEOUT, + .musb_speed = 0, +}; + +/* + * Enable the USB phy + */ +static u8 phy_on(void) +{ + u32 devconf2; + u32 timeout; + + devconf2 = readl(&am35x_scm_general_regs->devconf2); + + devconf2 &= ~(DEVCONF2_RESET | DEVCONF2_PHYPWRDN | DEVCONF2_OTGPWRDN | + DEVCONF2_OTGMODE | DEVCONF2_REFFREQ | + DEVCONF2_PHY_GPIOMODE); + devconf2 |= DEVCONF2_SESENDEN | DEVCONF2_VBDTCTEN | DEVCONF2_PHY_PLLON | + DEVCONF2_REFFREQ_13MHZ | DEVCONF2_DATPOL; + + writel(devconf2, &am35x_scm_general_regs->devconf2); + + /* wait until the USB phy is turned on */ + timeout = musb_cfg.timeout; + while (timeout--) + if (readl(&am35x_scm_general_regs->devconf2) & DEVCONF2_PHYCKGD) + return 1; + + /* USB phy was not turned on */ + return 0; +} + +/* + * Disable the USB phy + */ +static void phy_off(void) +{ + u32 devconf2; + + /* + * Power down the on-chip PHY. + */ + devconf2 = readl(&am35x_scm_general_regs->devconf2); + + devconf2 &= ~DEVCONF2_PHY_PLLON; + devconf2 |= DEVCONF2_PHYPWRDN | DEVCONF2_OTGPWRDN; + writel(devconf2, &am35x_scm_general_regs->devconf2); +} + +/* + * This function performs platform specific initialization for usb0. + */ +int musb_platform_init(void) +{ + u32 revision; + u32 sw_reset; + + /* global usb reset */ + sw_reset = readl(&am35x_scm_general_regs->ip_sw_reset); + sw_reset |= (1 << 0); + writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset); + sw_reset &= ~(1 << 0); + writel(sw_reset, &am35x_scm_general_regs->ip_sw_reset); + + /* reset the controller */ + writel(0x1, &am35x_usb_regs->control); + udelay(5000); + + /* start the on-chip usb phy and its pll */ + if (phy_on() == 0) + return -1; + + /* Returns zero if e.g. not clocked */ + revision = readl(&am35x_usb_regs->revision); + if (revision == 0) + return -1; + + return 0; +} + +/* + * This function performs platform specific deinitialization for usb0. + */ +void musb_platform_deinit(void) +{ + /* Turn off the phy */ + phy_off(); +} diff --git a/drivers/usb/musb/am35x.h b/drivers/usb/musb/am35x.h new file mode 100644 index 0000000..756c3ae --- /dev/null +++ b/drivers/usb/musb/am35x.h @@ -0,0 +1,94 @@ +/* + * am35x.h - TI's AM35x platform specific usb wrapper definitions. + * + * Author: Ajay Kumar Gupta <ajay.gupta@ti.com> + * + * Based on drivers/usb/musb/da8xx.h + * + * Copyright (c) 2010 Texas Instruments Incorporated + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef __AM35X_USB_H__ +#define __AM35X_USB_H__ + +#include <asm/arch/am35x_def.h> +#include "musb_core.h" + +/* Base address of musb wrapper */ +#define AM35X_USB_OTG_BASE 0x5C040000 + +/* Base address of musb core */ +#define AM35X_USB_OTG_CORE_BASE (AM35X_USB_OTG_BASE + 0x400) + +/* Timeout for AM35x usb module */ +#define AM35X_USB_OTG_TIMEOUT 0x3FFFFFF + +/* + * AM35x platform USB wrapper register overlay. + */ +struct am35x_usb_regs { + u32 revision; + u32 control; + u32 status; + u32 emulation; + u32 reserved0[1]; + u32 autoreq; + u32 srpfixtime; + u32 ep_intsrc; + u32 ep_intsrcset; + u32 ep_intsrcclr; + u32 ep_intmsk; + u32 ep_intmskset; + u32 ep_intmskclr; + u32 ep_intsrcmsked; + u32 reserved1[1]; + u32 core_intsrc; + u32 core_intsrcset; + u32 core_intsrcclr; + u32 core_intmsk; + u32 core_intmskset; + u32 core_intmskclr; + u32 core_intsrcmsked; + u32 reserved2[1]; + u32 eoi; + u32 mop_sop_en; + u32 reserved3[2]; + u32 txmode; + u32 rxmode; + u32 epcount_mode; +}; + +#define am35x_usb_regs ((struct am35x_usb_regs *)AM35X_USB_OTG_BASE) + +/* USB 2.0 PHY Control */ +#define DEVCONF2_PHY_GPIOMODE (1 << 23) +#define DEVCONF2_OTGMODE (3 << 14) +#define DEVCONF2_SESENDEN (1 << 13) /* Vsess_end comparator */ +#define DEVCONF2_VBDTCTEN (1 << 12) /* Vbus comparator */ +#define DEVCONF2_REFFREQ_24MHZ (2 << 8) +#define DEVCONF2_REFFREQ_26MHZ (7 << 8) +#define DEVCONF2_REFFREQ_13MHZ (6 << 8) +#define DEVCONF2_REFFREQ (0xf << 8) +#define DEVCONF2_PHYCKGD (1 << 7) +#define DEVCONF2_VBUSSENSE (1 << 6) +#define DEVCONF2_PHY_PLLON (1 << 5) /* override PLL suspend */ +#define DEVCONF2_RESET (1 << 4) +#define DEVCONF2_PHYPWRDN (1 << 3) +#define DEVCONF2_OTGPWRDN (1 << 2) +#define DEVCONF2_DATPOL (1 << 1) + +#endif /* __AM35X_USB_H__ */ diff --git a/drivers/usb/musb/musb_udc.c b/drivers/usb/musb/musb_udc.c index fc43cf4..6f6ed61 100644 --- a/drivers/usb/musb/musb_udc.c +++ b/drivers/usb/musb/musb_udc.c @@ -57,6 +57,8 @@ #include "musb_core.h" #if defined(CONFIG_USB_OMAP3) #include "omap3.h" +#elif defined(CONFIG_USB_AM35X) +#include "am35x.h" #elif defined(CONFIG_USB_DAVINCI) #include "davinci.h" #endif |