【TINY4412】LINUX移植笔记：（9）USB驱动
【TINY4412】LINUX移植笔记：（9）USB驱动
宿主机 ： 虚拟机 Ubuntu 16.04 LTS / X64
目标板[底板]： Tiny4412SDK - 1506
目标板[核心板]： Tiny4412 - 1412
LINUX内核： 4.12.0
交叉编译器： gcc-arm-none-eabi-5_4-2016q3
日期： 2017-7-27 21:29:22
作者： SY
简介
开发板使用了一块USB-HUB芯片USB4604，扩展了4路USB。一路用于以太网，两路用于USB接口，还有一路使用排针引出。
设备树
# exynos4.dtsi
exynos_usbphy: exynos-usbphy@125B0000 {
compatible = "samsung,exynos4210-usb2-phy";
reg = <0x125B0000 0x100>;
samsung,pmureg-phandle = <&pmu_system_controller>;
clocks = <&clock CLK_USB_DEVICE>, <&clock CLK_XUSBXTI>;
clock-names = "phy", "ref";
#phy-cells = <1>;
status = "disabled";
};
# exynos4412.dtsi
&exynos_usbphy {
compatible = "samsung,exynos4x12-usb2-phy";
samsung,sysreg-phandle = <&sys_reg>;
};
# exynos4412-tiny4412.dts
&exynos_usbphy {
status = "okay";
};
# exynos4.dtsi
ehci: ehci@12580000 {
compatible = "samsung,exynos4210-ehci";
reg = <0x12580000 0x100>;
interrupts = 70 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clock CLK_USB_HOST>;
clock-names = "usbhost";
status = "disabled";
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
phys = <&exynos_usbphy 1>;
status = "disabled";
};
port@1 {
reg = <1>;
phys = <&exynos_usbphy 2>;
status = "disabled";
};
port@2 {
reg = <2>;
phys = <&exynos_usbphy 3>;
status = "disabled";
};
};
# exynos4412-tiny4412.dts
&ehci {
status = "okay";
port@0 {
status = "okay";
};
port@1 {
status = "okay";
};
port@2 {
status = "okay";
};
};
# exynos4412-tiny4412.dts
usb-hub {
compatible = "smsc,usb4604";
reset-gpios = <&gpm2 4 GPIO_ACTIVE_LOW>;
initial-mode = <1>;
status = "okay";
}; 发明设备树的人很好借鉴了面向对象程序设计，使用继承的方式，如果对父类的方法写的不满意，可以重写父类方法。
initial-mode = <1>;
# 参考 usb4604.c
enum usb4604_mode {
USB4604_MODE_UNKNOWN,
USB4604_MODE_HUB,
USB4604_MODE_STANDBY,
};menuconfig
Device Drivers --->
[*] USB support --->
<*> EHCI HCD (USB 2.0) support
<*> EHCI support for Samsung S5P/EXYNOS SoC Series
<*> USB Mass Storage support
<*> USB4604 HSIC to USB20 Driver测试
插上U盘 ，USB并不能识别。在移植U-BOOT的USB时，就被坑过，那个USB复位引脚没有配置，所以导致不能正确启动USB，因此直奔主题：
#ifdef CONFIG_OF
static const struct of_device_id usb4604_of_match[] = {
{ .compatible = "smsc,usb4604" },
{}
};
MODULE_DEVICE_TABLE(of, usb4604_of_match);
#endif
static struct i2c_driver usb4604_i2c_driver = {
.driver = {
.name = "usb4604",
.pm = &usb4604_i2c_pm_ops,
.of_match_table = of_match_ptr(usb4604_of_match),
},
.probe = usb4604_i2c_probe,
.id_table = usb4604_id,
};
module_i2c_driver(usb4604_i2c_driver);放置调试语句：
static int usb4604_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct usb4604 *hub;
pr_notice("------------I am Hear!----------\n");
hub = devm_kzalloc(&i2c->dev, sizeof(*hub), GFP_KERNEL);
if (!hub)
return -ENOMEM;
i2c_set_clientdata(i2c, hub);
hub->dev = &i2c->dev;
return usb4604_probe(hub);
}重新上电，特么的居然没有执行！瞬间火大了，仔细检测了设备树
compatible = "smsc,usb4604";
status = "okay";按道理匹配了，然后使能了，没理由不执行probe函数
困扰了一天，突然发现module_i2c_driver(usb4604_i2c_driver);，居然不是module_init()，估计需要使用I2C总线，但是I2C最快也才400Kbps，这种辣鸡总线也配USB使用，参考网上资料，直接从usb3503.c移植。其实移植很简单，就是将usb3053.c、usb3053.h全部替换为usb4064.c、usb4064.h即可。 删除原来的usb4064.c
再次测试：
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
[ 0.000000] Booting Linux on physical CPU 0xa00
[ 0.000000] Linux version 4.12.0-ga37d87e-dirty (root@ubuntu) (gcc version 5.4.1 20160919 (release) [ARM/embedded-5-branch revision 240496] (GNU Tools for ARM Embedded Processors) ) #111 SMP PREEMPT Thu Jul 27 21:36:42 CST 2017
[ 0.000000] CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] OF: fdt: Machine model: FriendlyARM TINY4412 board based on Exynos4412
[ 0.000000] bootconsole [earlycon0] enabled
[ 0.000000] Memory policy: Data cache writealloc
[ 0.000000] cma: Reserved 96 MiB at 0x7a000000
[ 0.000000] Samsung CPU ID: 0xe4412011
[ 0.000000] percpu: Embedded 16 pages/cpu @ef78f000 s34968 r8192 d22376 u65536
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 260608
[ 0.000000] Kernel command line: initrd=0x42000040,0x800000 root=/dev/ram0 rw rootfstype=ext2 console=ttySAC0,115200 init=/linuxrc earlyprintk
[ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] Memory: 919504K/1048576K available (7168K kernel code, 324K rwdata, 2364K rodata, 1024K init, 326K bss, 30768K reserved, 98304K cma-reserved, 163840K highmem)
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
[ 0.000000] vmalloc : 0xf0800000 - 0xff800000 ( 240 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xf0000000 ( 768 MB)
[ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
[ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
[ 0.000000] .text : 0xc0008000 - 0xc0800000 (8160 kB)
[ 0.000000] .init : 0xc0b00000 - 0xc0c00000 (1024 kB)
[ 0.000000] .data : 0xc0c00000 - 0xc0c51268 ( 325 kB)
[ 0.000000] .bss : 0xc0c58fc4 - 0xc0caa920 ( 327 kB)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] Preemptible hierarchical RCU implementation.
[ 0.000000] RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
[ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] L2C: platform modifies aux control register: 0x02070000 -> 0x3e470001
[ 0.000000] L2C: platform provided aux values permit register corruption.
[ 0.000000] L2C: DT/platform modifies aux control register: 0x02070000 -> 0x3e470001
[ 0.000000] L2C-310 enabling early BRESP for Cortex-A9
[ 0.000000] L2C-310: enabling full line of zeros but not enabled in Cortex-A9
[ 0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[ 0.000000] L2C-310 cache controller enabled, 16 ways, 1024 kB
[ 0.000000] L2C-310: CACHE_ID 0x4100c4c8, AUX_CTRL 0x4e470001
[ 0.000000] Exynos4x12 clocks: sclk_apll = 700000000, sclk_mpll = 800000000
[ 0.000000] sclk_epll = 96035156, sclk_vpll = 108035156, arm_clk = 1400000000
[ 0.000000] Switching to timer-based delay loop, resolution 41ns
[ 0.000000] clocksource: mct-frc: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[ 0.000003] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
[ 0.008065] Console: colour dummy device 80x30
[ 0.012419] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000)
[ 0.022834] pid_max: default: 32768 minimum: 301
[ 0.027577] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.034198] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.041621] CPU: Testing write buffer coherency: ok
[ 0.046602] CPU0: thread -1, cpu 0, socket 10, mpidr 80000a00
[ 0.084751] Setting up static identity map for 0x40100000 - 0x40100060
[ 0.144728] smp: Bringing up secondary CPUs ...
[ 0.204799] CPU1: thread -1, cpu 1, socket 10, mpidr 80000a01
[ 0.284779] CPU2: thread -1, cpu 2, socket 10, mpidr 80000a02
[ 0.364781] CPU3: thread -1, cpu 3, socket 10, mpidr 80000a03
[ 0.364827] smp: Brought up 1 node, 4 CPUs
[ 0.386283] SMP: Total of 4 processors activated (192.00 BogoMIPS).
[ 0.392611] CPU: All CPU(s) started in SVC mode.
[ 0.397895] devtmpfs: initialized
[ 0.407990] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[ 0.415719] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.425473] futex hash table entries: 1024 (order: 4, 65536 bytes)
[ 0.434612] pinctrl core: initialized pinctrl subsystem
[ 0.440278] /lcd0-power-domain@10023C80 has as child subdomain: /tv-power-domain@10023C20.
[ 0.449056] NET: Registered protocol family 16
[ 0.454819] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.462634] cpuidle: using governor menu
[ 0.486076] SCSI subsystem initialized
[ 0.489869] usbcore: registered new interface driver usbfs
[ 0.495340] usbcore: registered new interface driver hub
[ 0.500713] usbcore: registered new device driver usb
[ 0.506342] Advanced Linux Sound Architecture Driver Initialized.
[ 0.513054] clocksource: Switched to clocksource mct-frc
[ 0.525375] missing cooling_device property
[ 0.529461] failed to build thermal zone cpu-thermal: -2
[ 0.534916] NET: Registered protocol family 2
[ 0.539609] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.546628] TCP bind hash table entries: 8192 (order: 5, 163840 bytes)
[ 0.553282] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.559668] UDP hash table entries: 512 (order: 2, 24576 bytes)
[ 0.565612] UDP-Lite hash table entries: 512 (order: 2, 24576 bytes)
[ 0.572109] NET: Registered protocol family 1
[ 0.576691] RPC: Registered named UNIX socket transport module.
[ 0.582512] RPC: Registered udp transport module.
[ 0.587304] RPC: Registered tcp transport module.
[ 0.592060] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.598710] Trying to unpack rootfs image as initramfs...
[ 0.604401] rootfs image is not initramfs (no cpio magic); looks like an initrd
[ 0.638266] Freeing initrd memory: 8196K
[ 0.642881] audit: initializing netlink subsys (disabled)
[ 0.648400] audit: type=2000 audit(0.645:1): state=initialized audit_enabled=0 res=1
[ 0.648494] workingset: timestamp_bits=30 max_order=18 bucket_order=0
[ 0.653295] NFS: Registering the id_resolver key type
[ 0.653310] Key type id_resolver registered
[ 0.653312] Key type id_legacy registered
[ 0.653334] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[ 0.656511] bounce: pool size: 64 pages
[ 0.656540] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 0.656544] io scheduler noop registered
[ 0.656547] io scheduler deadline registered
[ 0.656562] io scheduler cfq registered (default)
[ 0.656565] io scheduler mq-deadline registered
[ 0.656568] io scheduler kyber registered
[ 0.663511] samsung-usb2-phy 125b0000.exynos-usbphy: 125b0000.exynos-usbphy supply vbus not found, using dummy regulator
[ 0.667317] dma-pl330 12680000.pdma: Loaded driver for PL330 DMAC-141330
[ 0.667323] dma-pl330 12680000.pdma: DBUFF-32x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
[ 0.669218] dma-pl330 12690000.pdma: Loaded driver for PL330 DMAC-141330
[ 0.669223] dma-pl330 12690000.pdma: DBUFF-32x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
[ 0.669967] dma-pl330 12850000.mdma: Loaded driver for PL330 DMAC-141330
[ 0.66997] dma-pl330 12850000.mdma: DBUFF-64x8bytes Num_Chans-8 Num_Peri-1 Num_Events-32
[ 0.762165] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[ 0.763391] 13800000.serial: ttySAC0 at MMIO 0x13800000 (irq = 47, base_baud = 0) is a S3C6400/10
[ 0.785864] console [ttySAC0] enabled
[ 0.785864] console [ttySAC0] enabled
[ 0.793211] bootconsole [earlycon0] disabled
[ 0.793211] bootconsole [earlycon0] disabled
[ 0.802037] 13810000.serial: ttySAC1 at MMIO 0x13810000 (irq = 48, base_baud = 0) is a S3C6400/10
[ 0.802329] 13820000.serial: ttySAC2 at MMIO 0x13820000 (irq = 49, base_baud = 0) is a S3C6400/10
[ 0.802624] 13830000.serial: ttySAC3 at MMIO 0x13830000 (irq = 50, base_baud = 0) is a S3C6400/10
[ 0.815688] brd: module loaded
[ 0.821021] loop: module loaded
[ 0.821827] libphy: Fixed MDIO Bus: probed
[ 0.822076] usbcore: registered new interface driver cdc_ether
[ 0.822378] usbcore: registered new interface driver dm9601
[ 0.827979] usbcore: registered new interface driver net1080
[ 0.833619] usbcore: registered new interface driver cdc_subset
[ 0.839478] usbcore: registered new interface driver zaurus
[ 0.845066] usbcore: registered new interface driver cdc_ncm
[ 0.850913] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.857203] ehci-exynos: EHCI EXYNOS driver
[ 0.861924] exynos-ehci 12580000.ehci: EHCI Host Controller
[ 0.866926] exynos-ehci 12580000.ehci: new USB bus registered, assigned bus number 1
[ 0.874837] exynos-ehci 12580000.ehci: irq 45, io mem 0x12580000
[ 0.903084] exynos-ehci 12580000.ehci: USB 2.0 started, EHCI 1.00
[ 0.903291] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 0.903361] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.903432] usb usb1: Product: EHCI Host Controller
[ 0.905696] usb usb1: Manufacturer: Linux 4.12.0-ga37d87e-dirty ehci_hcd
[ 0.912379] usb usb1: SerialNumber: 12580000.ehci
[ 0.917458] hub 1-0:1.0: USB hub found
[ 0.920816] hub 1-0:1.0: 3 ports detected
[ 0.925326] usbcore: registered new interface driver usb-storage
[ 0.941005] USB4604 usb-hub: switched to HUB mode
[ 0.941055] USB4604 usb-hub: USB4604_probe: probed in hub mode
[ 0.941860] s3c-rtc 10070000.rtc: failed to find rtc source clock
[ 0.947414] s3c-rtc: probe of 10070000.rtc failed with error -2
[ 0.953440] i2c /dev entries driver
[ 0.958496] s3c2410-wdt 10060000.watchdog: watchdog inactive, reset disabled, irq disabled
[ 0.965420] device-mapper: ioctl: 4.35.0-ioctl (2016-06-23) initialised: [email protected]
[ 0.974892] sdhci: Secure Digital Host Controller Interface driver
[ 0.979561] sdhci: Copyright(c) Pierre Ossman
[ 0.984180] s3c-sdhci 12530000.sdhci: clock source 2: mmc_busclk.2 (20000000 Hz)
[ 1.043096] mmc0: SDHCI controller on samsung-hsmmc [12530000.sdhci] using ADMA
[ 1.043283] Synopsys Designware Multimedia Card Interface Driver
[ 1.047026] dwmmc_exynos 12550000.mmc: IDMAC supports 32-bit address mode.
[ 1.047139] dwmmc_exynos 12550000.mmc: Using internal DMA controller.
[ 1.047390] dwmmc_exynos 12550000.mmc: Version ID is 240a
[ 1.052785] dwmmc_exynos 12550000.mmc: DW MMC controller at irq 98,32 bit host data width,128 deep fifo
[ 1.062253] mmc_host mmc1: card is polling.
[ 1.093098] mmc_host mmc1: Bus speed (slot 0) = 50000000Hz (slot req 400000Hz, actual 396825HZ div = 63)
[ 1.101909] mmc0: new high speed SDHC card at address 0007
[ 1.102261] mmcblk0: mmc0:0007 SD16G 14.5 GiB
[ 1.123117] dwmmc_exynos 12550000.mmc: 1 slots initialized
[ 1.124481] s5p-secss 10830000.sss: s5p-sss driver registered
[ 1.124909] usbcore: registered new interface driver usbhid
[ 1.124965] usbhid: USB HID core driver
[ 1.127540] NET: Registered protocol family 10
[ 1.131226] Segment Routing with IPv6
[ 1.131302] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 1.135866] NET: Registered protocol family 17
[ 1.139829] NET: Registered protocol family 15
[ 1.144370] Key type dns_resolver registered
[ 1.148662] Registering SWP/SWPB emulation handler
[ 1.167628] hctosys: unable to open rtc device (rtc0)
[ 1.168291] ALSA device list:
[ 1.168325] No soundcards found.
[ 1.168891] RAMDISK: gzip image found at block 0
[ 1.197817] mmc_host mmc1: Bus speed (slot 0) = 50000000Hz (slot req 52000000Hz, actual 50000000HZ div = 0)
[ 1.198198] mmc1: new DDR MMC card at address 0001
[ 1.198826] mmcblk1: mmc1:0001 4YMD3R 3.63 GiB
[ 1.199092] mmcblk1boot0: mmc1:0001 4YMD3R partition 1 4.00 MiB
[ 1.200665] mmcblk1boot1: mmc1:0001 4YMD3R partition 2 4.00 MiB
[ 1.206700] mmcblk1rpmb: mmc1:0001 4YMD3R partition 3 512 KiB
[ 1.213022] mmcblk1: p1 p2 p3 p4
[ 1.283149] usb 1-2: new high-speed USB device number 2 using exynos-ehci
[ 1.323765] VFS: Mounted root (ext2 filesystem) on device 1:0.
[ 1.323958] devtmpfs: mounted
[ 1.325101] Freeing unused kernel memory: 1024K
Processing /etc/profile... Done
[root@TINY4412:/]# [ 1.473765] usb 1-2: New USB device found, idVendor=0424, idProduct=4604
[ 1.473841] usb 1-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 1.474527] hub 1-2:1.0: USB hub found
[ 1.474631] hub 1-2:1.0: 5 ports detected
[ 1.793220] usb 1-2.4: new high-speed USB device number 3 using exynos-ehci
[ 1.944001] usb 1-2.4: config 1 interface 0 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7
[ 2.133264] usb 1-2.5: new high-speed USB device number 4 using exynos-ehci
[ 2.284321] usb 1-2.5: New USB device found, idVendor=0424, idProduct=2530
[ 2.284440] usb 1-2.5: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[ 2.284554] usb 1-2.5: Product: Bridge device
插上U盘
[ 1484.693225] usb 1-2.3: new high-speed USB device number 5 using exynos-ehci
[ 1484.847975] usb 1-2.3: New USB device found, idVendor=0930, idProduct=6544
[ 1484.848124] usb 1-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1484.848263] usb 1-2.3: Product: TransMemory
[ 1484.848366] usb 1-2.3: Manufacturer: TOSHIBA
[ 1484.848808] usb 1-2.3: SerialNumber: 3AC4C59887B0CE11F96D5759
[ 1484.856862] usb-storage 1-2.3:1.0: USB Mass Storage device detected
[ 1484.862138] scsi host0: usb-storage 1-2.3:1.0
[ 1485.933432] scsi 0:0:0:0: Direct-Access TOSHIBA TransMemory 1.00 PQ: 0 ANSI: 4
[ 1485.936627] sd 0:0:0:0: [sda] 15155200 512-byte logical blocks: (7.76 GB/7.23 GiB)
[ 1485.936943] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 1485.937878] sd 0:0:0:0: [sda] Write Protect is off
[ 1485.939168] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1485.953446] sda: sda1
[ 1485.958706] sd 0:0:0:0: [sda] Attached SCSI removable disk可以正常识别了！
[root@TINY4412:/]# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 7.7M 2.0M 5.7M 26% /
devtmpfs 449.0M 0 449.0M 0% /dev
[root@TINY4412:/]# mkdir /mnt/usb
[root@TINY4412:/]# mount /dev/sda1 /mnt/usb/
[ 1515.592924] FAT-fs (sda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[root@TINY4412:/]# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 7.7M 2.0M 5.7M 26% /
devtmpfs 449.0M 0 449.0M 0% /dev
/dev/sda1 7.4G 16.0K 7.4G 0% /mnt/usb挂载U盘正常。