From: Constantine Shulyupin <co...@makelinux.com> Sets USB PHY clock source to 24 MHz clock and call USB configuration from board initialization.
Tested with OTG configuration, usb gadget g_zero on DM365 EVM connected to PC. References: Definition of USB_PHY_CTRL and PHYCLKFREQ: - http://www.makelinux.com/lib/ti/DM36x_ARM/doc-141 Original patch by miguel.agui...@ridgerun.com three years ago: - http://www.mail-archive.com/davinci-linux-open-source@linux.davincidsp.com/msg14741.html Signed-off-by: Constantine Shulyupin <co...@makelinux.com> --- Note: Changelog Changes since v5 http://www.spinics.net/lists/kernel/msg1413120.html accordingy feedback of nsek...@ti.com http://www.spinics.net/lists/kernel/msg1414914.html - phy configuration moved to drivers/usb/musb/davinci.c - USB_OTG configuration is submitted in separated patch: http://www.spinics.net/lists/kernel/msg1414964.html - Setting current limit to 1000 mA. Any way the current is limited to 510 mA in davinci_setup_usb. Changes since v4 http://www.spinics.net/lists/kernel/msg1412995.html - removed fix of dev_info in musb_init_controller Changes since v3 http://www.spinics.net/lists/kernel/msg1412544.html: - removed optional altering of pr_info Changes since v1 http://marc.info/?l=linux-kernel&m=130894150803661&w=2: - removed optional code and reordered - removed alternation of GPIO33, which is multiplexed with DRVVBUS, because is not need for peripheral USB This patch is based on code from projects Arago, Angstom and RidgeRun. --- arch/arm/mach-davinci/board-dm365-evm.c | 2 ++ drivers/usb/musb/davinci.c | 3 +++ drivers/usb/musb/davinci.h | 1 + 3 files changed, 6 insertions(+) diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c index 688a9c5..ba5ffc1 100644 --- a/arch/arm/mach-davinci/board-dm365-evm.c +++ b/arch/arm/mach-davinci/board-dm365-evm.c @@ -38,6 +38,7 @@ #include <mach/mmc.h> #include <mach/nand.h> #include <mach/keyscan.h> +#include <mach/usb.h> #include <media/tvp514x.h> @@ -610,6 +611,7 @@ static __init void dm365_evm_init(void) dm365_init_spi0(BIT(0), dm365_evm_spi_info, ARRAY_SIZE(dm365_evm_spi_info)); + davinci_setup_usb(1000, 8); } MACHINE_START(DAVINCI_DM365_EVM, "DaVinci DM365 EVM") diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c index 472c8b4..af09ebf 100644 --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -428,6 +428,9 @@ static int davinci_musb_init(struct musb *musb) __raw_writel(deepsleep, DM355_DEEPSLEEP); } + if (machine_is_davinci_dm365_evm()) + writel(readl(USB_PHY_CTRL) | USBPHY_CLKFREQ_24MHZ, USB_PHY_CTRL); + /* reset the controller */ musb_writel(tibase, DAVINCI_USB_CTRL_REG, 0x1); diff --git a/drivers/usb/musb/davinci.h b/drivers/usb/musb/davinci.h index 371baa0..e737d97 100644 --- a/drivers/usb/musb/davinci.h +++ b/drivers/usb/musb/davinci.h @@ -16,6 +16,7 @@ /* Integrated highspeed/otg PHY */ #define USBPHY_CTL_PADDR 0x01c40034 +#define USBPHY_CLKFREQ_24MHZ BIT(13) #define USBPHY_DATAPOL BIT(11) /* (dm355) switch D+/D- */ #define USBPHY_PHYCLKGD BIT(8) #define USBPHY_SESNDEN BIT(7) /* v(sess_end) comparator */ -- 1.7.9.5 _______________________________________________ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
