Problem:
I have got the MX25PDK board to detect the USB hub but its power is cut
at usb_hub_power_on(hub) because (I guess) the control register is not set
properly.
Method:
a) Enable USB options in mx25pdk.h
b) Enable signal muxing of USBH2_PWR and USBH2_OC.
Experiment:
When booting Linux it is shown: "io mem 0x53ff4400" so my guess was that
address should be
used for both mxc_set_usbcontrol() and ehci_hcd_init()? And actually, changing
the define
helped me:
wPortStatus: 0x508 wPortChange: 0x0 <- With writel(v, IMX_USB_BASE + 0x600);
wPortChange: 0x301 wPortChange: 0x1 <- With writel(v, IMX_USB_BASE + 0x400);
The change did not make very much sense, and actually wPortChange: 0x301
wPortChange: 0x1
is given also when skipping mxc_set_usbcontrol() completely :)
1) So, what is the proper control address for using the MX25PDK's standard USB
host port (not OTG)?
Indeed, without a proper mxc_set_usbcontrol() the root hub gets "local power
source is lost (inactive)".
Actually the USB host port, J18, supplies the required 5V (4.89V to be exact)
to my plugged stick
until usb_hub_power_on(hub) has run. This line makes the USB host controller
set the USBH2_PWR
(pin D9) to zero, that makes the regulator stop feeding the port.
2) Do I need to set the mux's SW_PAD_CTL for the D9 pins?
3) Are there any pins I have forgot to mux?
If I comment out usb_hub_power_on(hub):
| ...
| local power source is lost (inactive)
| no over-current condition exists
| usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length
0x4
| req=0 (0x0), type=163 (0xa3), value=0, index=1
| wPortStatus: 400 wPortChange: 0
| Port 1 Status 400 Change 0
| 1 USB Device(s) found
| scan end
| scanning bus for storage devices... 0 Storage Device(s) found
The 5V is kept but I will not get the wPortChange=0x1 so usb_new_device() will
be skipped. Off course, the usb_hub_power_on(hub) should be kept. But without
the 5V, usb_new_device() will not find any device :)
See bellow for details!
Hugo Holgersson
Debug log:
MX25PDK U-Boot > usb start
(Re)start USB...
USB: Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... New Device 0
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length
0x40
req=6 (0x6), type=128 (0x80), value=256, index=0
USB_DT_DEVICE request
set address 1
usb_control_msg: request: 0x5, requesttype: 0x0, value 0x1 index 0x0 length 0x0
req=5 (0x5), type=0 (0x0), value=1, index=0
USB_REQ_SET_ADDRESS
Len is 0
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length
0x12
req=6 (0x6), type=128 (0x80), value=256, index=0
USB_DT_DEVICE request
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length
0x9
req=6 (0x6), type=128 (0x80), value=512, index=0
USB_DT_CONFIG config
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0 length
0x19
req=6 (0x6), type=128 (0x80), value=512, index=0
USB_DT_CONFIG config
get_conf_no 0 Result 25, wLength 25
if 0, ep 0
##EP epmaxpacketin[1] = 8
set configuration 1
usb_control_msg: request: 0x9, requesttype: 0x0, value 0x1 index 0x0 length 0x0
req=9 (0x9), type=0 (0x0), value=1, index=0
USB_REQ_SET_CONFIGURATION
Len is 0
new device strings: Mfr=1, Product=2, SerialNumber=0
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x300 index 0x0 length
0xFF
req=6 (0x6), type=128 (0x80), value=768, index=0
USB_DT_STRING config
USB device number 1 default language ID 0x1
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x301 index 0x1 length
0xFF
req=6 (0x6), type=128 (0x80), value=769, index=1
USB_DT_STRING config
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x302 index 0x1 length
0xFF
req=6 (0x6), type=128 (0x80), value=770, index=1
USB_DT_STRING config
Manufacturer u-boot
Product EHCI Host Controller
SerialNumber
USB hub found
usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length
0x4
req=6 (0x6), type=160 (0xa0), value=10496, index=0
USB_DT_HUB config
usb_control_msg: request: 0x6, requesttype: 0xA0, value 0x2900 index 0x0 length
0x8
req=6 (0x6), type=160 (0xa0), value=10496, index=0
USB_DT_HUB config
1 ports detected
individual port power switching
standalone hub
global over-current protection
power on to power good time: 510ms
hub controller current requirement: 0mA
port 1 is removable
usb_control_msg: request: 0x0, requesttype: 0xA0, value 0x0 index 0x0 length 0x4
req=0 (0x0), type=160 (0xa0), value=0, index=0
get_hub_status returned status 1, change 8101
local power source is lost (inactive)
no over-current condition exists
enabling power on all ports
usb_control_msg: request: 0x3, requesttype: 0x23, value 0x8 index 0x1 length 0x0
req=3 (0x3), type=35 (0x23), value=8, index=1
Len is 0
port 1 returns 0
usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
req=0 (0x0), type=163 (0xa3), value=0, index=1
Port 1 Status 301 Change 1
port 1 connection change
usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
req=0 (0x0), type=163 (0xa3), value=0, index=1
portstatus 301, change 1, 1.5 Mb/s
usb_control_msg: request: 0x1, requesttype: 0x23, value 0x10 index 0x1 length
0x0
req=1 (0x1), type=35 (0x23), value=16, index=1
Len is 0
hub_port_reset: resetting port 0...
usb_control_msg: request: 0x3, requesttype: 0x23, value 0x4 index 0x1 length 0x0
req=3 (0x3), type=35 (0x23), value=4, index=1
Len is 0
usb_control_msg: request: 0x0, requesttype: 0xA3, value 0x0 index 0x1 length 0x4
req=0 (0x0), type=163 (0xa3), value=0, index=1
portstatus 303, change 10, 1.5 Mb/s
STAT_C_CONNECTION = 0 STAT_CONNECTION = 1 USB_PORT_STAT_ENABLE 1
usb_control_msg: request: 0x1, requesttype: 0x23, value 0x14 index 0x1 length
0x0
req=1 (0x1), type=35 (0x23), value=20, index=1
Len is 0
New Device 1
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0 length
0x40
dev=83fe13f0, pipe=84000083, buffer=83d9a55c, length=64, req=83feb7b4
req=6 (0x6), type=128 (0x80), value=256 (0x100), index=0
EHCI timed out on TD - token=0x80008c80
TOKEN=0x80248
usb_new_device: usb_get_descriptor() failed
hub: disabling port 1
usb_control_msg: request: 0x1, requesttype: 0x23, value 0x1 index 0x1 length 0x0
req=1 (0x1), type=35 (0x23), value=1, index=1
Len is 0
2 USB Device(s) found
scan end
scanning bus for storage devices... 0 Storage Device(s) found
MX25PDK U-Boot >
MX25PDK U-Boot > usb tree
Device Tree:
1 Hub (480 Mb/s, 0mA)
| u-boot EHCI Host Controller
|
+-0 See Interface (1.5 Mb/s, 0mA)
Code changes:
diff --git a/board/freescale/mx25pdk/lowlevel_init.S
b/board/freescale/mx25pdk/lowlevel_init.S
index 6e6810f..1997115 100644
--- a/board/freescale/mx25pdk/lowlevel_init.S
+++ b/board/freescale/mx25pdk/lowlevel_init.S
@@ -15,7 +15,41 @@
* GNU General Public License for more details.
*/
+#include <asm/macro.h>
+#include <asm/arch/macro.h>
+#include <asm/arch/imx-regs.h>
+#include <generated/asm-offsets.h>
+
+/*
+ * clocks
+ */
+.macro init_clocks
+
+ /* disable clock output */
+ write32 IMX_CCM_BASE + CCM_MCR, 0x00000000
+ write32 IMX_CCM_BASE + CCM_CCTL, 0x50030000
+
+ /* first enable CLKO debug output
+ * 0x40000000 enables the debug CLKO signal
+ * 0x05000000 sets CLKO divider to 6
+ * 0x00600000 makes CLKO parent clk the USB clk
+ */
+ write32 0x53f80064, 0x45600000
+ write32 0x53f80008, 0x20034000
+
+ /*
+ * enable all implemented clocks in all three
+ * clock control registers
+ */
+ write32 IMX_CCM_BASE + CCM_CGCR0, 0x1fffffff
+ write32 IMX_CCM_BASE + CCM_CGCR1, 0xffffffff
+ write32 IMX_CCM_BASE + CCM_CGCR2, 0xfffff
+
+ /* Devide NAND clock by 32 */
+ write32 IMX_CCM_BASE + CCM_PCDR2, 0x0101011F
+.endm
+
.globl lowlevel_init
lowlevel_init:
-
+ init_clocks
mov pc, lr
diff --git a/board/freescale/mx25pdk/mx25pdk.c
b/board/freescale/mx25pdk/mx25pdk.c
index 4a8352f..9212607 100644
--- a/board/freescale/mx25pdk/mx25pdk.c
+++ b/board/freescale/mx25pdk/mx25pdk.c
@@ -19,10 +19,12 @@
#include <common.h>
#include <asm/io.h>
+#include <asm/gpio.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/imx25-pinmux.h>
#include <asm/arch/sys_proto.h>
+
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
@@ -42,6 +44,25 @@ int board_early_init_f(void)
int board_init(void)
{
+ struct iomuxc_mux_ctl *muxctl;
+ struct iomuxc_pad_ctl *padctl;
+ u32 gpio_mux_mode5 = MX25_PIN_MUX_MODE(5);
+ u32 gpio_mux_mode6 = MX25_PIN_MUX_MODE(6);
+
+ muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
+
+ /* USBH2_PWR */
+ writel(gpio_mux_mode6, &muxctl->pad_d9);
+ //writel(gpio_mux_mode5, &muxctl->pad_d9);
+ //gpio_direction_output(MXC_GPIO_PORT_TO_NUM(4, 11), 1); /* Try keep
power on. */
+
+ /* USBH2_OC */
+ writel(gpio_mux_mode6, &muxctl->pad_d8);
+
+ /* USB_BT_CS low selects USB Host */
+ writel(gpio_mux_mode5, &muxctl->pad_a21); /* GPIO2[7] */
+ gpio_direction_output(MXC_GPIO_PORT_TO_NUM(2, 7), 0); /* Chip select 0*/
+
/* address of boot parameters */
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
diff --git a/config.mk b/config.mk
index 3fa9eef..b83179c 100644
--- a/config.mk
+++ b/config.mk
@@ -163,8 +163,8 @@ else
ARFLAGS = crv
endif
RELFLAGS= $(PLATFORM_RELFLAGS)
-DBGFLAGS= -g # -DDEBUG
-OPTFLAGS= -Os #-fomit-frame-pointer
+DBGFLAGS= -g -DDEBUG
+OPTFLAGS= -fno-schedule-insns -fno-schedule-insns2 #-fomit-frame-pointer
OBJCFLAGS += --gap-fill=0xff
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
index a0cfbb7..54b90c8 100644
--- a/drivers/usb/host/ehci-mxc.c
+++ b/drivers/usb/host/ehci-mxc.c
@@ -102,7 +102,8 @@ static int mxc_set_usbcontrol(int port, unsigned int flags)
}
#endif
- writel(v, IMX_USB_BASE + USBCTRL_OTGBASE_OFFSET);
+ writel(v, (IMX_USB_BASE +
+ (0x200 * CONFIG_MXC_USB_PORT)));
return 0;
}
diff --git a/include/configs/mx25pdk.h b/include/configs/mx25pdk.h
index 8414376..b26e2bc 100644
--- a/include/configs/mx25pdk.h
+++ b/include/configs/mx25pdk.h
@@ -17,6 +17,7 @@
/* High Level Configuration Options */
+#define CONFIG_MX25
#define CONFIG_MX25_CLK32 32768 /* OSC32K frequency */
#define CONFIG_SYS_HZ 1000
#define CONFIG_SYS_TEXT_BASE 0x81200000
@@ -83,6 +84,28 @@
/* U-Boot commands */
#include <config_cmd_default.h>
#define CONFIG_CMD_CACHE
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_USB
+
+/*
+ * USB
+ */
+#ifdef CONFIG_CMD_USB
+#define CONFIG_USB_EHCI /* Enable EHCI USB support */
+#define CONFIG_USB_EHCI_MXC
+#define CONFIG_EHCI_HCD_INIT_AFTER_RESET
+#define CONFIG_MXC_USB_FLAGS 0
+#define CONFIG_MXC_USB_PORT 2
+#define CONFIG_EHCI_IS_TDI
+#define CONFIG_USB_STORAGE
+#define CONFIG_DOS_PARTITION
+#define CONFIG_SUPPORT_VFAT
+#endif /* CONFIG_CMD_USB */
+
+/*
+ * GPIO
+ */
+#define CONFIG_MXC_GPIO
/* Ethernet */
#define CONFIG_FEC_MXC
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