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USB i.MX6: Add HSIC support 

HSIC needs some special setup for i.MX6. Most ugly detail is that
the HSIC needs help of the IOMUX to configure a pullup on the strobe
line. This has to be done after the ehci controller has started.
Fortunately there is only one muxing possibility for the HSIC ports
on i.MX6, so we can simply control the iomux from the usbmisc driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-01-31 15:21:59 +01:00
parent 298f7fc3b6
commit 8139fa78b9
1 changed files with 60 additions and 0 deletions
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60
drivers/usb/imx/imx-usb-misc.c
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@ -17,6 +17,8 @@
#include <init.h>
#include <io.h>
#include <usb/chipidea-imx.h>
#include <mach/imx6-regs.h>
#include <mach/iomux-mx6.h>
#define MX25_OTG_SIC_SHIFT 29
#define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT)
@ -345,14 +347,72 @@ static __maybe_unused struct imx_usb_misc_data mx5_data = {
.init = mx5_initialize_usb_hw,
};
static void mx6_hsic_pullup(unsigned long reg, int on)
{
u32 val;
val = readl(MX6_IOMUXC_BASE_ADDR + reg);
if (on)
val |= MX6_PAD_CTL_PUS_47K_UP;
else
val &= ~MX6_PAD_CTL_PUS_47K_UP;
writel(val, MX6_IOMUXC_BASE_ADDR + reg);
}
static __maybe_unused int mx6_initialize_usb_hw(void __iomem *base, int port,
unsigned int flags)
{
switch (port) {
case 0:
break;
case 1:
break;
case 2: /* HSIC port */
mx6_hsic_pullup(0x388, 0);
writel(0x00003000, base + 0x8);
writel(0x80001842, base + 0x10);
break;
case 3: /* HSIC port */
writel(0x00003000, base + 0xc);
writel(0x80001842, base + 0x14);
mx6_hsic_pullup(0x398, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static __maybe_unused int mx6_post_init(void __iomem *base, int port,
unsigned int flags)
{
switch (port) {
case 0:
break;
case 1:
break;
case 2: /* HSIC port */
mx6_hsic_pullup(0x388, 1);
break;
case 3: /* HSIC port */
mx6_hsic_pullup(0x398, 1);
break;
default:
return -EINVAL;
}
return 0;
}
static __maybe_unused struct imx_usb_misc_data mx6_data = {
.init = mx6_initialize_usb_hw,
.post_init = mx6_post_init,
};
static struct platform_device_id imx_usbmisc_ids[] = {