Add support for command line "usb reset" or "usb start" to initialize , "usb stop" to stop multiple USB controllers at once. Other commands like "usb tree" also support multiple controllers.
Example to add definitions in header file like include/configs/seaboard.h are: define CONFIG_USB_MULTI define CONFIG_USB_MAX_CONTROLLER_COUNT 3
Signed-off-by: Jim Lin jilin@nvidia.com --- arch/arm/cpu/armv7/tegra20/usb.c | 15 +++++++++++++++ arch/arm/include/asm/arch-tegra20/usb.h | 4 ++++ drivers/usb/host/ehci-tegra.c | 15 +++++++++++++++ 3 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv7/tegra20/usb.c b/arch/arm/cpu/armv7/tegra20/usb.c index 178bb13..141d608 100644 --- a/arch/arm/cpu/armv7/tegra20/usb.c +++ b/arch/arm/cpu/armv7/tegra20/usb.c @@ -352,7 +352,11 @@ int tegrausb_start_port(unsigned portnum, u32 *hccr, u32 *hcor)
if (portnum >= port_count) return -1; +#ifdef CONFIG_USB_MULTI + tegrausb_stop_port(portnum); +#else tegrausb_stop_port(); +#endif set_host_mode(&port[portnum]);
usbctlr = port[portnum].reg; @@ -362,6 +366,16 @@ int tegrausb_start_port(unsigned portnum, u32 *hccr, u32 *hcor) return 0; }
+#ifdef CONFIG_USB_MULTI +int tegrausb_stop_port(unsigned portnum) +{ + struct usb_ctlr *usbctlr; + + if (portnum >= port_count) + return -1; + + usbctlr = port[portnum].reg; +#else int tegrausb_stop_port(void) { struct usb_ctlr *usbctlr; @@ -370,6 +384,7 @@ int tegrausb_stop_port(void) return -1;
usbctlr = port[port_current].reg; +#endif
/* Stop controller */ writel(0, &usbctlr->usb_cmd); diff --git a/arch/arm/include/asm/arch-tegra20/usb.h b/arch/arm/include/asm/arch-tegra20/usb.h index 638033b..e7bc167 100644 --- a/arch/arm/include/asm/arch-tegra20/usb.h +++ b/arch/arm/include/asm/arch-tegra20/usb.h @@ -247,6 +247,10 @@ int tegrausb_start_port(unsigned portnum, u32 *hccr, u32 *hcor); * * @return 0 if ok, -1 if no port was active */ +#ifdef CONFIG_USB_MULTI +int tegrausb_stop_port(unsigned portnum); +#else int tegrausb_stop_port(void); +#endif
#endif /* _TEGRA_USB_H_ */ diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c index 4646b29..fa2e1b1 100644 --- a/drivers/usb/host/ehci-tegra.c +++ b/drivers/usb/host/ehci-tegra.c @@ -50,6 +50,12 @@ void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg) * Create the appropriate control structures to manage * a new EHCI host controller. */ +#ifdef CONFIG_USB_MULTI +int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor) +{ + return tegrausb_start_port(index, hccr, hcor); +} +#else int ehci_hcd_init(void) { u32 our_hccr, our_hcor; @@ -66,13 +72,22 @@ int ehci_hcd_init(void)
return 0; } +#endif
/* * Destroy the appropriate control structures corresponding * the the EHCI host controller. */ +#ifdef CONFIG_USB_MULTI +int ehci_hcd_stop(int index) +{ + tegrausb_stop_port(index); + return 0; +} +#else int ehci_hcd_stop(void) { tegrausb_stop_port(); return 0; } +#endif