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usb: dwc3: allow forcing a maximum speed 

this is mainly for testing. In order to be able
to test if we're enumerating correctly on all
speeds, let that be controlled by a module
parameter.

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2011-10-07 22:55:04 +03:00
parent b2c2271c82
commit 6c167fc9b0
3 changed files with 18 additions and 1 deletions
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15
drivers/usb/dwc3/core.c
View File

@ -59,6 +59,10 @@
#include "debug.h"
static char *maximum_speed = "super";
module_param(maximum_speed, charp, 0);
MODULE_PARM_DESC(maximum_speed, "Maximum supported speed.");
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
@ -370,6 +374,17 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
dwc->dev = &pdev->dev;
dwc->irq = irq;
if (!strncmp("super", maximum_speed, 5))
dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
else if (!strncmp("high", maximum_speed, 4))
dwc->maximum_speed = DWC3_DCFG_HIGHSPEED;
else if (!strncmp("full", maximum_speed, 4))
dwc->maximum_speed = DWC3_DCFG_FULLSPEED1;
else if (!strncmp("low", maximum_speed, 3))
dwc->maximum_speed = DWC3_DCFG_LOWSPEED;
else
dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
pm_runtime_forbid(&pdev->dev);

2
drivers/usb/dwc3/core.h
View File

@ -555,6 +555,7 @@ struct dwc3_hwparams {
* @regs: base address for our registers
* @regs_size: address space size
* @irq: IRQ number
* @maximum_speed: maximum speed requested (mainly for testing purposes)
* @revision: revision register contents
* @is_selfpowered: true when we are selfpowered
* @three_stage_setup: set if we perform a three phase setup
@ -595,6 +596,7 @@ struct dwc3 {
int irq;
u32 maximum_speed;
u32 revision;
#define DWC3_REVISION_173A 0x5533173a

2
drivers/usb/dwc3/gadget.c
View File

@ -1183,7 +1183,7 @@ static int dwc3_gadget_start(struct usb_gadget *g,
reg = dwc3_readl(dwc->regs, DWC3_DCFG);
reg &= ~(DWC3_DCFG_SPEED_MASK);
reg |= DWC3_DCFG_SUPERSPEED;
reg |= dwc->maximum_speed;
dwc3_writel(dwc->regs, DWC3_DCFG, reg);
dwc->start_config_issued = false;