tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
usb: chipidea: udc: add maximum-speed = full-speed option
This patch makes it possible to set the chipidea udc into full-speed only mode.
It is set by the oftree property "maximum-speed = full-speed".
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Michael Grzeschik
and committed by
Greg Kroah-Hartman
4f6743d5
fad56745
+16
+2
Documentation/devicetree/bindings/usb/ci-hdrc-imx.txt
+2
Documentation/devicetree/bindings/usb/ci-hdrc-imx.txt
···
18
18
- vbus-supply: regulator for vbus
19
19
- disable-over-current: disable over current detect
20
20
- external-vbus-divider: enables off-chip resistor divider for Vbus
21
+
- maximum-speed: limit the maximum connection speed to "full-speed".
21
22
22
23
Examples:
23
24
usb@02184000 { /* USB OTG */
···
29
28
fsl,usbmisc = <&usbmisc 0>;
30
29
disable-over-current;
31
30
external-vbus-divider;
31
+
maximum-speed = "full-speed";
32
32
};
+2
drivers/usb/chipidea/bits.h
+2
drivers/usb/chipidea/bits.h
···
50
50
#define PORTSC_PTC (0x0FUL << 16)
51
51
#define PORTSC_PHCD(d) ((d) ? BIT(22) : BIT(23))
52
52
/* PTS and PTW for non lpm version only */
53
+
#define PORTSC_PFSC BIT(24)
53
54
#define PORTSC_PTS(d) \
54
55
(u32)((((d) & 0x3) << 30) | (((d) & 0x4) ? BIT(25) : 0))
55
56
#define PORTSC_PTW BIT(28)
56
57
#define PORTSC_STS BIT(29)
57
58
58
59
/* DEVLC */
60
+
#define DEVLC_PFSC BIT(23)
59
61
#define DEVLC_PSPD (0x03UL << 25)
60
62
#define DEVLC_PSPD_HS (0x02UL << 25)
61
63
#define DEVLC_PTW BIT(27)
+11
drivers/usb/chipidea/core.c
+11
drivers/usb/chipidea/core.c
···
64
64
#include <linux/usb/otg.h>
65
65
#include <linux/usb/chipidea.h>
66
66
#include <linux/usb/of.h>
67
+
#include <linux/of.h>
67
68
#include <linux/phy.h>
68
69
#include <linux/regulator/consumer.h>
69
70
···
299
298
if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
300
299
hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
301
300
301
+
if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
302
+
if (ci->hw_bank.lpm)
303
+
hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC);
304
+
else
305
+
hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
306
+
}
307
+
302
308
/* USBMODE should be configured step by step */
303
309
hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
304
310
hw_write(ci, OP_USBMODE, USBMODE_CM, mode);
···
419
411
return PTR_ERR(platdata->reg_vbus);
420
412
}
421
413
}
414
+
415
+
if (of_usb_get_maximum_speed(dev->of_node) == USB_SPEED_FULL)
416
+
platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
422
417
423
418
return 0;
424
419
}
+1
include/linux/usb/chipidea.h
+1
include/linux/usb/chipidea.h