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sunxi: musb: Check Vbus-det before enabling otg port power

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Sending out 5V when there is a charger connected to the otg port is not a
good idea, so check for this and error out.

Note this commit currently breaks otg support on the q8h tablets, as we need
to do some magic with the pmic there to get vbus info, this is deliberate
(better safe then sorry), fixing this is on my TODO list.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
This commit is contained in:
Hans de Goede 2015-02-16 22:13:43 +01:00
parent 636317c9ee
commit 52defe8f65
7 changed files with 42 additions and 0 deletions
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8
board/sunxi/Kconfig
View File

@ -223,6 +223,14 @@ config USB0_VBUS_PIN
Set the Vbus enable pin for usb0 (otg). This takes a string in the
format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
config USB0_VBUS_DET
string "Vbus detect pin for usb0 (otg)"
depends on USB_MUSB_SUNXI
default ""
---help---
Set the Vbus detect pin for usb0 (otg). This takes a string in the
format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
config USB1_VBUS_PIN
string "Vbus enable pin for usb1 (ehci0)"
default "PH6" if MACH_SUN4I || MACH_SUN7I

1
configs/Ampe_A76_defconfig
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@ -3,6 +3,7 @@ CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=2,AXP209_POWER"
CONFIG_FDTFILE="sun5i-a13-ampe-a76.dtb"
CONFIG_USB_MUSB_SUNXI=y
CONFIG_USB0_VBUS_PIN="PG12"
CONFIG_USB0_VBUS_DET="PG01"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:82,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"

1
configs/Chuwi_V7_CW0825_defconfig
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@ -3,6 +3,7 @@ CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER"
CONFIG_FDTFILE="sun4i-a10-chuwi-v7-cw0825.dtb"
CONFIG_USB_MUSB_SUNXI=y
CONFIG_USB0_VBUS_PIN="PB9"
CONFIG_USB0_VBUS_DET="PH5"
CONFIG_VIDEO_LCD_MODE="x:1024,y:768,depth:24,pclk_khz:51000,le:19,ri:300,up:6,lo:31,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="PH8"
CONFIG_VIDEO_LCD_BL_EN="PH7"

1
configs/Hyundai_A7HD_defconfig
View File

@ -6,6 +6,7 @@ CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER"
CONFIG_FDTFILE="sun4i-a10-hyundai-a7hd.dtb"
CONFIG_USB_MUSB_SUNXI=y
CONFIG_USB0_VBUS_PIN="PB09"
CONFIG_USB0_VBUS_DET="PH5"
CONFIG_USB1_VBUS_PIN=""
CONFIG_USB2_VBUS_PIN="PH6"
CONFIG_VIDEO_LCD_MODE="x:1024,y:600,depth:18,pclk_khz:51000,le:45,ri:274,up:22,lo:12,hs:1,vs:1,sync:3,vmode:0"

1
configs/Inet_86VS_defconfig
View File

@ -3,6 +3,7 @@ CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER"
CONFIG_FDTFILE="sun5i-a13-inet-86vs.dtb"
CONFIG_USB_MUSB_SUNXI=y
CONFIG_USB0_VBUS_PIN="PG12"
CONFIG_USB0_VBUS_DET="PG1"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:45,ri:209,up:22,lo:22,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"

1
configs/TZX-Q8-713B7_defconfig
View File

@ -3,6 +3,7 @@ CONFIG_SYS_EXTRA_OPTIONS="CONS_INDEX=2,AXP209_POWER"
CONFIG_FDTFILE="sun5i-a13-tzx-q8-713b7.dtb"
CONFIG_USB_MUSB_SUNXI=y
CONFIG_USB0_VBUS_PIN="PG12"
CONFIG_USB0_VBUS_DET="PG1"
CONFIG_VIDEO_LCD_MODE="x:800,y:480,depth:18,pclk_khz:33000,le:87,ri:40,up:31,lo:13,hs:1,vs:1,sync:3,vmode:0"
CONFIG_VIDEO_LCD_POWER="AXP0-0"
CONFIG_VIDEO_LCD_BL_EN="AXP0-1"

29
drivers/usb/musb-new/sunxi.c
View File

@ -22,7 +22,9 @@
*/
#include <common.h>
#include <asm/arch/cpu.h>
#include <asm/arch/gpio.h>
#include <asm/arch/usbc.h>
#include <asm-generic/gpio.h>
#include "linux-compat.h"
#include "musb_core.h"
@ -224,6 +226,33 @@ static int sunxi_musb_init(struct musb *musb)
pr_debug("%s():\n", __func__);
if (is_host_enabled(musb)) {
int vbus_det = sunxi_name_to_gpio(CONFIG_USB0_VBUS_DET);
if (vbus_det == -1) {
eprintf("Error invalid Vusb-det pin\n");
return -EINVAL;
}
err = gpio_request(vbus_det, "vbus0_det");
if (err)
return err;
err = gpio_direction_input(vbus_det);
if (err) {
gpio_free(vbus_det);
return err;
}
err = gpio_get_value(vbus_det);
if (err) {
eprintf("Error: A charger is plugged into the OTG\n");
gpio_free(vbus_det);
return -EIO;
}
gpio_free(vbus_det);
}
err = sunxi_usbc_request_resources(0);
if (err)
return err;