AM35x has musb interface (version 1.8) and uses CPPI41 DMA engine. It supports upto 500mA of power in host mode.
Signed-off-by: Ajay Kumar Gupta <[email protected]> --- Patch created against linus'tree + all musb patches in Greg's queue and patches available in linux-omap/for-next branch. arch/arm/mach-omap2/board-am3517evm.c | 43 +++++++++++++++++++++++++++++++++ arch/arm/mach-omap2/usb-musb.c | 4 +++ arch/arm/plat-omap/include/plat/usb.h | 21 ++++++++++++++++ 3 files changed, 68 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-omap2/board-am3517evm.c b/arch/arm/mach-omap2/board-am3517evm.c index af383a8..313559c 100644 --- a/arch/arm/mach-omap2/board-am3517evm.c +++ b/arch/arm/mach-omap2/board-am3517evm.c @@ -35,6 +35,7 @@ #include <plat/control.h> #include <plat/usb.h> #include <plat/display.h> +#include <plat/control.h> #include "mux.h" @@ -375,6 +376,43 @@ static void __init am3517_evm_init_irq(void) omap_gpio_init(); } +static struct omap_musb_board_data musb_board_data = { + .interface_type = MUSB_INTERFACE_ULPI, + .mode = MUSB_OTG, + .power = 500, +}; + +static __init void am3517_evm_musb_init(void) +{ + u32 devconf2; + + /* + * Set up USB clock/mode in the DEVCONF2 register. + */ + devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); + + /* USB2.0 PHY reference clock is 13 MHz */ + devconf2 &= ~CONF2_REFFREQ; + devconf2 |= CONF2_REFFREQ_13MHZ; + + /* + * We have to override VBUS/ID signals when MUSB is configured into the + * host-only mode -- ID pin will float if no cable is connected, so the + * controller won't be able to drive VBUS thinking that it's a B-device. + * Otherwise, we want to use the OTG mode and enable VBUS comparators. + */ + devconf2 &= ~CONF2_OTGMODE; +#ifdef CONFIG_USB_MUSB_HOST + devconf2 |= CONF2_FORCE_HOST; +#else + devconf2 |= CONF2_SESENDEN | CONF2_VBDTCTEN; +#endif + + omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); + + usb_musb_init(&musb_board_data); +} + static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = { .port_mode[0] = EHCI_HCD_OMAP_MODE_PHY, #if defined(CONFIG_PANEL_SHARP_LQ043T1DG01) || \ @@ -393,6 +431,8 @@ static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = { #ifdef CONFIG_OMAP_MUX static struct omap_board_mux board_mux[] __initdata = { + /* USB OTG DRVVBUS offset = 0x212 */ + OMAP3_MUX(SAD2D_MCAD23, OMAP_MUX_MODE0 | OMAP_PIN_INPUT_PULLDOWN), { .reg_offset = OMAP_MUX_TERMINATOR }, }; #else @@ -459,6 +499,9 @@ static void __init am3517_evm_init(void) ARRAY_SIZE(am3517evm_i2c1_boardinfo)); /*Ethernet*/ am3517_evm_ethernet_init(&am3517_evm_emac_pdata); + + /* MUSB */ + am3517_evm_musb_init(); } static void __init am3517_evm_map_io(void) diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c index 3befddb..883795b 100644 --- a/arch/arm/mach-omap2/usb-musb.c +++ b/arch/arm/mach-omap2/usb-musb.c @@ -21,6 +21,7 @@ #include <linux/usb/musb.h> #include <mach/irqs.h> +#include <mach/am35xx.h> #include <plat/usb.h> #ifdef CONFIG_USB_MUSB_SOC @@ -69,6 +70,9 @@ void __init usb_musb_init(struct omap_musb_board_data *board_data) { if (cpu_is_omap243x()) { musb_resources[0].start = OMAP243X_HS_BASE; + } else if (cpu_is_omap3517()) { + musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE; + musb_resources[1].start = INT_35XX_USBOTG_IRQ; } else if (cpu_is_omap34xx()) { musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE; } else if (cpu_is_omap44xx()) { diff --git a/arch/arm/plat-omap/include/plat/usb.h b/arch/arm/plat-omap/include/plat/usb.h index 60c734f..c7a019c 100644 --- a/arch/arm/plat-omap/include/plat/usb.h +++ b/arch/arm/plat-omap/include/plat/usb.h @@ -168,5 +168,26 @@ void omap_usb_init(struct omap_usb_config *pdata); # define USBT2TLL5PI (1 << 17) # define USB0PUENACTLOI (1 << 16) # define USBSTANDBYCTRL (1 << 15) +/* AM3517 */ +/* USB 2.0 PHY Control */ +#define CONF2_PHY_GPIOMODE (1 << 23) +#define CONF2_OTGMODE (3 << 14) +#define CONF2_NO_OVERRIDE (0 << 14) +#define CONF2_FORCE_HOST (1 << 14) +#define CONF2_FORCE_DEVICE (2 << 14) +#define CONF2_FORCE_HOST_VBUS_LOW (3 << 14) +#define CONF2_SESENDEN (1 << 13) +#define CONF2_VBDTCTEN (1 << 12) +#define CONF2_REFFREQ_24MHZ (2 << 8) +#define CONF2_REFFREQ_26MHZ (7 << 8) +#define CONF2_REFFREQ_13MHZ (6 << 8) +#define CONF2_REFFREQ (0xf << 8) +#define CONF2_PHYCLKGD (1 << 7) +#define CONF2_VBUSSENSE (1 << 6) +#define CONF2_PHY_PLLON (1 << 5) +#define CONF2_RESET (1 << 4) +#define CONF2_PHYPWRDN (1 << 3) +#define CONF2_OTGPWRDN (1 << 2) +#define CONF2_DATPOL (1 << 1) #endif /* __ASM_ARCH_OMAP_USB_H */ -- 1.6.2.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
