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Re: [microblaze-uclinux] USB : Problem in porting C67x00 Driver to petalinux
Mount file system works, it's because of NLS.
2009/6/10 Childhood Hwang <childhood.hwang@xxxxxxxxx>:
> Hi, John:
> A big thanks for your patch, I find out what's the matter with my porting now.
> My driver works well now. Again thanks a lot.
>
> Yea, Dr. Johann Pfefferl, I make the coding of the file
> arch/microblaze/platform/common/c67x00.c ,it works.
>
> I try to mount file system on usb storage next, but something wrong. I
> will try more testing.
>
> Logs below:
>
> # mount /dev/sda1 /tmp/mnt
> VFS: Can't find ext3 filesystem on dev sda1.
> VFS: Can't find an ext2 filesystem on dev sda1.
> cramfs: wrong magic
> FAT: codepage cp437 not found
> FAT: codepage cp437 not found
> VFS: Can't find a romfs filesystem on dev sda1.
> mount: Mounting /dev/sda1 on /tmp/mnt failed: Invalid argument
>
> Regards,
> Childhood.
>
> 2009/6/10 Dr. Johann Pfefferl <j.pfefferl@xxxxxxxxx>:
>> Hello,
>>
>> I think the patch is missing at least one file:
>> software/linux-2.6.x-petalogix/arch/microblaze/platform/common/c67x00.c
>>
>> Hans
>>
>> John Williams <john.williams@xxxxxxxxxxxxx> wrote:
>>> Hi Childhood,
>>>
>>> Please find attached a patch that will should cleanly to a
>>> petalinux-v0.40 release. It does several things:
>>>
>>> * back-port the C67X00 driver from a more recent kernel
>>> * Add the necessary platform initialiser glue
>>>
>>> I've also uploaded an ML505 USB demo HW app to the petalogix server:
>>>
>>> http://developer.petalogix.com/downloads/petalogix-ml505-usb.tar.gz
>>>
>>> A couple of tricks to watch for:
>>> * because the USB interrupt comes in from an external port, directly
>>> to the interrupt controller, you have to hard wire the IQR number in
>>> arch/microblaze/platform/common/c67x00.c
>>> * you have to use the PERIPH_TYPE_OVERRIDES parameter in your MSS
>>> file, to rename the EPC instance to something that the platform
>>> initialiser can use. See the example HW design for details
>>>
>>> Regards,
>>>
>>> John
>>>
>>> On Wed, Jun 10, 2009 at 1:38 AM, Childhood Hwang
>>> <childhood.hwang@xxxxxxxxx> wrote:
>>> > I am tring to port C67x00 driver to petalinux right now. But I
>>> > can't make it work.
>>> > I saw there was some discussion before, and it seem's that those
>>> > discussions were the right thing messing me.
>>> >
>>> > I found the discussion in link: http://marc.info/?t=122849175200004&r=1&w=2
>>> >
>>> > But there is no answer how to getover this, just that the problem was
>>> > in different status handling for older kernel.
>>> >
>>> > I am quite newest to Linux.
>>> >
>>> > I insert a kernel module that register the platform device for USB,
>>> > I think the interrupt works well.
>>> > Register code is like that,:
>>> >
>>> > static struct resource c67x00_resources[] = {
>>> > [0] = {
>>> > .start = 0x80800000,
>>> > .end = 0x8080ffff,
>>> > .flags = IORESOURCE_MEM,
>>> > },
>>> > [1] = {
>>> > .start = 0,
>>> > .end = 0,
>>> > .flags = IORESOURCE_IRQ,
>>> > },
>>> > };
>>> >
>>> > static struct c67x00_platform_data c67x00_data = {
>>> > .sie_config = C67X00_SIE1_HOST | C67X00_SIE2_HOST,
>>> > .hpi_regstep = 0x02,
>>> > };
>>> >
>>> > static struct platform_device c67x00_device = {
>>> > .name = "c67x00",
>>> > .id = -1,
>>> > .num_resources = ARRAY_SIZE(c67x00_resources),
>>> > .resource = c67x00_resources,
>>> > .dev.platform_data = &c67x00_data,
>>> > };
>>> >
>>> > static int __init c67x00_device_reg_init(void)
>>> > {
>>> > /* printk("<1>Hello module world.\n");
>>> > printk("<1>Module parameters were (0x%08x) and \"%s\"\n", myint,
>>> > mystr); */
>>> > printk("======== Call : c67x00_device_reg_init() ========\n");
>>> >
>>> > /* A non 0 return means init_module failed; module can't be loaded. */
>>> > return platform_device_register(&c67x00_device);
>>> > }
>>> >
>>> >
>>> > static void __exit c67x00_device_reg_exit(void)
>>> > {
>>> > printk(KERN_ALERT "======== Goodbye c67x00_device_reg_exit().
>>> > ========\n");
>>> > platform_device_unregister(&c67x00_device);
>>> > }
>>> >
>>> > module_init(c67x00_device_reg_init);
>>> > module_exit(c67x00_device_reg_exit);
>>> >
>>> >
>>> > And the log list below:
>>> >
>>> > # insmod /lib/modules/kernel/drivers/misc/c67x00_device_reg.ko
>>> > ======== Call : c67x00_device_reg_init() ========
>>> > ============ USB driver : Call c67x00_drv_probe() ============
>>> > c67x00 c67x00: Cypress C67X00 Host Controller
>>> > drivers/usb/core/inode.c: creating file 'devices'
>>> > drivers/usb/core/inode.c: creating file '001'
>>> > c67x00 c67x00: new USB bus registered, assigned bus number 1
>>> > usb usb1: default language 0x0409
>>> > usb usb1: new device strings: Mfr=3, Product=2, SerialNumber=1
>>> > usb usb1: Product: Cypress C67X00 Host Controller
>>> > usb usb1: Manufacturer: Linux 2.6.20-uc0 c67x00-hcd
>>> > usb usb1: SerialNumber: c67x00_sie
>>> > usb usb1: usb_probe_device
>>> > usb usb1: configuration #1 chosen from 1 choice
>>> > usb usb1: adding 1-0:1.0 (config #1, interface 0)
>>> > hub 1-0:1.0: usb_probe_interface
>>> > hub 1-0:1.0: usb_probe_interface - got id
>>> > hub 1-0:1.0: USB hub found
>>> > hub 1-0:1.0: 2 ports detected
>>> > hub 1-0:1.0: standalone hub
>>> > hub 1-0:1.0: ganged power switching
>>> > hub 1-0:1.0: global over-current protection
>>> > hub 1-0:1.0: power on to power good time: 100ms
>>> > hub 1-0:1.0: local power source is good
>>> > hub 1-0:1.0: no over-current condition exists
>>> > hub 1-0:1.0: enabling power on all ports
>>> > drivers/usb/core/inode.c: creating file '001'
>>> > hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000
>>> > c67x00 c67x00: Cypress C67X00 Host Controller
>>> > drivers/usb/core/inode.c: creating file '002'
>>> > c67x00 c67x00: new USB bus registered, assigned bus number 2
>>> > usb usb2: default language 0x0409
>>> > usb usb2: new device strings: Mfr=3, Product=2, SerialNumber=1
>>> > usb usb2: Product: Cypress C67X00 Host Controller
>>> > usb usb2: Manufacturer: Linux 2.6.20-uc0 c67x00-hcd
>>> > usb usb2: SerialNumber: c67x00_sie
>>> > usb usb2: usb_probe_device
>>> > usb usb2: configuration #1 chosen from 1 choice
>>> > usb usb2: adding 2-0:1.0 (config #1, interface 0)
>>> > hub 2-0:1.0: usb_probe_interface
>>> > hub 2-0:1.0: usb_probe_interface - got id
>>> > hub 2-0:1.0: USB hub found
>>> > hub 2-0:1.0: 2 ports detected
>>> > hub 2-0:1.0: standalone hub
>>> > hub 2-0:1.0: ganged power switching
>>> > hub 2-0:1.0: global over-current protection
>>> > hub 2-0:1.0: power on to power good time: 100ms
>>> > hub 2-0:1.0: local power source is good
>>> > hub 2-0:1.0: no over-current condition exists
>>> > hub 2-0:1.0: enabling power on all ports
>>> > drivers/usb/core/inode.c: creating file '001'
>>> > hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000
>>> >
>>> >
>>> >
>>> > # hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0002
>>> > hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s
>>> > hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101
>>> > c67x00 c67x00: ClearPortFeature (0): C_RESET
>>> > usb 1-1: new full speed USB device using c67x00 and address 2
>>> > c67x00 c67x00: ClearPortFeature (0): C_RESET
>>> > c67x00 c67x00: ### TIMEOUT at 0x0500
>>> > c67x00 c67x00: urb: 0x902390cc
>>> > c67x00 c67x00: endpoint: 0
>>> > c67x00 c67x00: pipeout: 1
>>> > c67x00 c67x00: ly_base_addr: 0x0700
>>> > c67x00 c67x00: port_length: 0x0008
>>> > c67x00 c67x00: pid_ep: 0xd0
>>> > c67x00 c67x00: dev_addr: 0x00
>>> > c67x00 c67x00: ctrl_reg: 0x01
>>> > c67x00 c67x00: status: 0x14
>>> > c67x00 c67x00: retry_cnt: 0x00
>>> > c67x00 c67x00: residue: 0x00
>>> > c67x00 c67x00: next_td_addr: 0x0000
>>> > c67x00 c67x00: data:<3>usb 1-1: device not accepting address 2, error -115
>>> > c67x00 c67x00: ClearPortFeature (0): C_RESET
>>> > usb 1-1: new full speed USB device using c67x00 and address 3
>>> > c67x00 c67x00: ClearPortFeature (0): C_RESET
>>> > c67x00 c67x00: ### TIMEOUT at 0x0500
>>> > c67x00 c67x00: urb: 0x902390cc
>>> > c67x00 c67x00: endpoint: 0
>>> > c67x00 c67x00: pipeout: 1
>>> > c67x00 c67x00: ly_base_addr: 0x0700
>>> > c67x00 c67x00: port_length: 0x0008
>>> > c67x00 c67x00: pid_ep: 0xd0
>>> > c67x00 c67x00: dev_addr: 0x00
>>> > c67x00 c67x00: ctrl_reg: 0x01
>>> > c67x00 c67x00: status: 0x14
>>> > c67x00 c67x00: retry_cnt: 0x00
>>> > c67x00 c67x00: residue: 0x00
>>> > c67x00 c67x00: next_td_addr: 0x0000
>>> > c67x00 c67x00: data:<3>usb 1-1: device not accepting address 3, error -115
>>> > c67x00 c67x00: ClearPortFeature (0): C_RESET
>>> > usb 1-1: new full speed USB device using c67x00 and address 4
>>> > c67x00 c67x00: ### TIMEOUT at 0x0500
>>> > c67x00 c67x00: urb: 0x902390cc
>>> > c67x00 c67x00: endpoint: 0
>>> > c67x00 c67x00: pipeout: 1
>>> > c67x00 c67x00: ly_base_addr: 0x0700
>>> > c67x00 c67x00: port_length: 0x0008
>>> > c67x00 c67x00: pid_ep: 0xd0
>>> > c67x00 c67x00: dev_addr: 0x00
>>> > c67x00 c67x00: ctrl_reg: 0x01
>>> > c67x00 c67x00: status: 0x14
>>> > c67x00 c67x00: retry_cnt: 0x00
>>> > c67x00 c67x00: residue: 0x00
>>> > c67x00 c67x00: next_td_addr: 0x0000
>>> > c67x00 c67x00: data:<3>usb 1-1: device not accepting address 4, error -115
>>> > c67x00 c67x00: ClearPortFeature (0): C_RESET
>>> > usb 1-1: new full speed USB device using c67x00 and address 5
>>> > c67x00 c67x00: ### TIMEOUT at 0x0500
>>> > c67x00 c67x00: urb: 0x902390cc
>>> > c67x00 c67x00: endpoint: 0
>>> > c67x00 c67x00: pipeout: 1
>>> > c67x00 c67x00: ly_base_addr: 0x0700
>>> > c67x00 c67x00: port_length: 0x0008
>>> > c67x00 c67x00: pid_ep: 0xd0
>>> > c67x00 c67x00: dev_addr: 0x00
>>> > c67x00 c67x00: ctrl_reg: 0x01
>>> > c67x00 c67x00: status: 0x14
>>> > c67x00 c67x00: retry_cnt: 0x00
>>> > c67x00 c67x00: residue: 0x00
>>> > c67x00 c67x00: next_td_addr: 0x0000
>>> > c67x00 c67x00: data:<3>usb 1-1: device not accepting address 5, error -115
>>> > ___________________________
>>> > microblaze-uclinux mailing list
>>> > microblaze-uclinux@xxxxxxxxxxxxxx
>>> > Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux
>>> > Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>>> >
>>> >
>>>
>>>
>>>
>>> --
>>> John Williams, PhD, B.Eng, B.IT
>>> PetaLogix - Linux Solutions for a Reconfigurable World
>>> w: www.petalogix.com p: +61-7-30090663 f: +61-7-30090663
>>
>>> Index: software/linux-2.6.x-petalogix/arch/microblaze/platform/common/Makefile
>>> ===================================================================
>>> --- software/linux-2.6.x-petalogix/arch/microblaze/platform/common/Makefile (revision 5469)
>>> +++ software/linux-2.6.x-petalogix/arch/microblaze/platform/common/Makefile (working copy)
>>> @@ -20,7 +20,9 @@
>>> platobj-$(CONFIG_INPUT_KEYPADDEV) += xbtn_decoder.o
>>> platobj-$(CONFIG_PCI) += xpci.o
>>> platobj-$(CONFIG_XILINX_IIC) += xiic.o
>>> +platobj-$(CONFIG_USB_C67X00_HCD) += c67x00.o
>>>
>>> +
>>> obj-y += $(platobj-y) $(platobj-m)
>>>
>>> # Make these platform setup sources dependent on .config
>>> @@ -38,3 +40,5 @@
>>> $(obj)/xbtn_decoder.o: .config
>>> $(obj)/xpci.o: .config
>>> $(obj)/xiic.o: .config
>>> +$(obj)/c67x00.o: .config
>>> +
>>> Index: software/linux-2.6.x-petalogix/drivers/usb/Kconfig
>>> ===================================================================
>>> --- software/linux-2.6.x-petalogix/drivers/usb/Kconfig (revision 5469)
>>> +++ software/linux-2.6.x-petalogix/drivers/usb/Kconfig (working copy)
>>> @@ -12,6 +12,7 @@
>>> default y if USB_ARCH_HAS_OHCI
>>> default y if USB_ARCH_HAS_EHCI
>>> default y if ARM # SL-811
>>> + default y if MICROBLAZE
>>> default PCI
>>>
>>> # many non-PCI SOC chips embed OHCI
>>> Index: software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-drv.c
>>> ===================================================================
>>> --- software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-drv.c (revision 0)
>>> +++ software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-drv.c (revision 0)
>>> @@ -0,0 +1,243 @@
>>> +/*
>>> + * c67x00-drv.c: Cypress C67X00 USB Common infrastructure
>>> + *
>>> + * Copyright (C) 2006-2008 Barco N.V.
>>> + * Derived from the Cypress cy7c67200/300 ezusb linux driver and
>>> + * based on multiple host controller drivers inside the linux kernel.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License as published by
>>> + * the Free Software Foundation; either version 2 of the License, or
>>> + * (at your option) any later version.
>>> + *
>>> + * This program is distributed in the hope that it will be useful,
>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>>> + * GNU General Public License for more details.
>>> + *
>>> + * You should have received a copy of the GNU General Public License
>>> + * along with this program; if not, write to the Free Software
>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
>>> + * MA 02110-1301 USA.
>>> + */
>>> +
>>> +/*
>>> + * This file implements the common infrastructure for using the c67x00.
>>> + * It is both the link between the platform configuration and subdrivers and
>>> + * the link between the common hardware parts and the subdrivers (e.g.
>>> + * interrupt handling).
>>> + *
>>> + * The c67x00 has 2 SIE's (serial interface engine) wich can be configured
>>> + * to be host, device or OTG (with some limitations, E.G. only SIE1 can be OTG).
>>> + *
>>> + * Depending on the platform configuration, the SIE's are created and
>>> + * the corresponding subdriver is initialized (c67x00_probe_sie).
>>> + */
>>> +
>>> +#include <linux/device.h>
>>> +#include <linux/io.h>
>>> +#include <linux/list.h>
>>> +#include <linux/usb.h>
>>> +#include <linux/usb/c67x00.h>
>>> +
>>> +#include "c67x00.h"
>>> +#include "c67x00-hcd.h"
>>> +
>>> +static void c67x00_probe_sie(struct c67x00_sie *sie,
>>> + struct c67x00_device *dev, int sie_num)
>>> +{
>>> + spin_lock_init(&sie->lock);
>>> + sie->dev = dev;
>>> + sie->sie_num = sie_num;
>>> + sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
>>> +
>>> + switch (sie->mode) {
>>> + case C67X00_SIE_HOST:
>>> + c67x00_hcd_probe(sie);
>>> + break;
>>> +
>>> + case C67X00_SIE_UNUSED:
>>> + dev_info(sie_dev(sie),
>>> + "Not using SIE %d as requested\n", sie->sie_num);
>>> + break;
>>> +
>>> + default:
>>> + dev_err(sie_dev(sie),
>>> + "Unsupported configuration: 0x%x for SIE %d\n",
>>> + sie->mode, sie->sie_num);
>>> + break;
>>> + }
>>> +}
>>> +
>>> +static void c67x00_remove_sie(struct c67x00_sie *sie)
>>> +{
>>> + switch (sie->mode) {
>>> + case C67X00_SIE_HOST:
>>> + c67x00_hcd_remove(sie);
>>> + break;
>>> +
>>> + default:
>>> + break;
>>> + }
>>> +}
>>> +
>>> +static irqreturn_t c67x00_irq(int irq, void *__dev)
>>> +{
>>> + struct c67x00_device *c67x00 = __dev;
>>> + struct c67x00_sie *sie;
>>> + u16 msg, int_status;
>>> + int i, count = 8;
>>> +
>>> + int_status = c67x00_ll_hpi_status(c67x00);
>>> + if (!int_status)
>>> + return IRQ_NONE;
>>> +
>>> + while (int_status != 0 && (count-- >= 0)) {
>>> + c67x00_ll_irq(c67x00, int_status);
>>> + for (i = 0; i < C67X00_SIES; i++) {
>>> + sie = &c67x00->sie[i];
>>> + msg = 0;
>>> + if (int_status & SIEMSG_FLG(i))
>>> + msg = c67x00_ll_fetch_siemsg(c67x00, i);
>>> + if (sie->irq)
>>> + sie->irq(sie, int_status, msg);
>>> + }
>>> + int_status = c67x00_ll_hpi_status(c67x00);
>>> + }
>>> +
>>> + if (int_status)
>>> + dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! "
>>> + "status = 0x%04x\n", int_status);
>>> +
>>> + return IRQ_HANDLED;
>>> +}
>>> +
>>> +/* ------------------------------------------------------------------------- */
>>> +
>>> +static int __devinit c67x00_drv_probe(struct platform_device *pdev)
>>> +{
>>> + struct c67x00_device *c67x00;
>>> + struct c67x00_platform_data *pdata;
>>> + struct resource *res, *res2;
>>> + int ret, i;
>>> +
>>> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>> + if (!res)
>>> + return -ENODEV;
>>> +
>>> + res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>>> + if (!res2)
>>> + return -ENODEV;
>>> +
>>> + pdata = pdev->dev.platform_data;
>>> + if (!pdata)
>>> + return -ENODEV;
>>> +
>>> + c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL);
>>> + if (!c67x00)
>>> + return -ENOMEM;
>>> +
>>> + if (!request_mem_region(res->start, res->end - res->start + 1,
>>> + pdev->name)) {
>>> + dev_err(&pdev->dev, "Memory region busy\n");
>>> + ret = -EBUSY;
>>> + goto request_mem_failed;
>>> + }
>>> + c67x00->hpi.base = ioremap(res->start, res->end - res->start + 1);
>>> + if (!c67x00->hpi.base) {
>>> + dev_err(&pdev->dev, "Unable to map HPI registers\n");
>>> + ret = -EIO;
>>> + goto map_failed;
>>> + }
>>> +
>>> + spin_lock_init(&c67x00->hpi.lock);
>>> + c67x00->hpi.regstep = pdata->hpi_regstep;
>>> + c67x00->pdata = pdev->dev.platform_data;
>>> + c67x00->pdev = pdev;
>>> +
>>> + c67x00_ll_init(c67x00);
>>> + c67x00_ll_hpi_reg_init(c67x00);
>>> +
>>> + ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
>>> + if (ret) {
>>> + dev_err(&pdev->dev, "Cannot claim IRQ\n");
>>> + goto request_irq_failed;
>>> + }
>>> +
>>> + ret = c67x00_ll_reset(c67x00);
>>> + if (ret) {
>>> + dev_err(&pdev->dev, "Device reset failed\n");
>>> + goto reset_failed;
>>> + }
>>> +
>>> + for (i = 0; i < C67X00_SIES; i++)
>>> + c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
>>> +
>>> + platform_set_drvdata(pdev, c67x00);
>>> +
>>> + return 0;
>>> +
>>> + reset_failed:
>>> + free_irq(res2->start, c67x00);
>>> + request_irq_failed:
>>> + iounmap(c67x00->hpi.base);
>>> + map_failed:
>>> + release_mem_region(res->start, res->end - res->start + 1);
>>> + request_mem_failed:
>>> + kfree(c67x00);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static int __devexit c67x00_drv_remove(struct platform_device *pdev)
>>> +{
>>> + struct c67x00_device *c67x00 = platform_get_drvdata(pdev);
>>> + struct resource *res;
>>> + int i;
>>> +
>>> + for (i = 0; i < C67X00_SIES; i++)
>>> + c67x00_remove_sie(&c67x00->sie[i]);
>>> +
>>> + c67x00_ll_release(c67x00);
>>> +
>>> + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>>> + if (res)
>>> + free_irq(res->start, c67x00);
>>> +
>>> + iounmap(c67x00->hpi.base);
>>> +
>>> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>> + if (res)
>>> + release_mem_region(res->start, res->end - res->start + 1);
>>> +
>>> + kfree(c67x00);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static struct platform_driver c67x00_driver = {
>>> + .probe = c67x00_drv_probe,
>>> + .remove = __devexit_p(c67x00_drv_remove),
>>> + .driver = {
>>> + .owner = THIS_MODULE,
>>> + .name = "c67x00",
>>> + },
>>> +};
>>> +MODULE_ALIAS("platform:c67x00");
>>> +
>>> +static int __init c67x00_init(void)
>>> +{
>>> + return platform_driver_register(&c67x00_driver);
>>> +}
>>> +
>>> +static void __exit c67x00_exit(void)
>>> +{
>>> + platform_driver_unregister(&c67x00_driver);
>>> +}
>>> +
>>> +module_init(c67x00_init);
>>> +module_exit(c67x00_exit);
>>> +
>>> +MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
>>> +MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
>>> +MODULE_LICENSE("GPL");
>>> Index: software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-hcd.c
>>> ===================================================================
>>> --- software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-hcd.c (revision 0)
>>> +++ software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-hcd.c (revision 0)
>>> @@ -0,0 +1,412 @@
>>> +/*
>>> + * c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver
>>> + *
>>> + * Copyright (C) 2006-2008 Barco N.V.
>>> + * Derived from the Cypress cy7c67200/300 ezusb linux driver and
>>> + * based on multiple host controller drivers inside the linux kernel.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License as published by
>>> + * the Free Software Foundation; either version 2 of the License, or
>>> + * (at your option) any later version.
>>> + *
>>> + * This program is distributed in the hope that it will be useful,
>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>>> + * GNU General Public License for more details.
>>> + *
>>> + * You should have received a copy of the GNU General Public License
>>> + * along with this program; if not, write to the Free Software
>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
>>> + * MA 02110-1301 USA.
>>> + */
>>> +
>>> +#include <linux/device.h>
>>> +#include <linux/platform_device.h>
>>> +#include <linux/usb.h>
>>> +
>>> +#include "c67x00.h"
>>> +#include "c67x00-hcd.h"
>>> +
>>> +/* --------------------------------------------------------------------------
>>> + * Root Hub Support
>>> + */
>>> +
>>> +static __u8 c67x00_hub_des[] = {
>>> + 0x09, /* __u8 bLength; */
>>> + 0x29, /* __u8 bDescriptorType; Hub-descriptor */
>>> + 0x02, /* __u8 bNbrPorts; */
>>> + 0x00, /* __u16 wHubCharacteristics; */
>>> + 0x00, /* (per-port OC, no power switching) */
>>> + 0x32, /* __u8 bPwrOn2pwrGood; 2ms */
>>> + 0x00, /* __u8 bHubContrCurrent; 0 mA */
>>> + 0x00, /* __u8 DeviceRemovable; ** 7 Ports max ** */
>>> + 0xff, /* __u8 PortPwrCtrlMask; ** 7 ports max ** */
>>> +};
>>> +
>>> +static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port)
>>> +{
>>> + struct c67x00_hcd *c67x00 = sie->private_data;
>>> + unsigned long flags;
>>> +
>>> + c67x00_ll_husb_reset(sie, port);
>>> +
>>> + spin_lock_irqsave(&c67x00->lock, flags);
>>> + c67x00_ll_husb_reset_port(sie, port);
>>> + spin_unlock_irqrestore(&c67x00->lock, flags);
>>> +
>>> + c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT);
>>> +}
>>> +
>>> +static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf)
>>> +{
>>> + struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
>>> + struct c67x00_sie *sie = c67x00->sie;
>>> + u16 status;
>>> + int i;
>>> +
>>> + *buf = 0;
>>> + status = c67x00_ll_usb_get_status(sie);
>>> + for (i = 0; i < C67X00_PORTS; i++)
>>> + if (status & PORT_CONNECT_CHANGE(i))
>>> + *buf |= (1 << i);
>>> +
>>> + /* bit 0 denotes hub change, b1..n port change */
>>> + *buf <<= 1;
>>> +
>>> + return !!*buf;
>>> +}
>>> +
>>> +static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
>>> + u16 wIndex, char *buf, u16 wLength)
>>> +{
>>> + struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
>>> + struct c67x00_sie *sie = c67x00->sie;
>>> + u16 status, usb_status;
>>> + int len = 0;
>>> + unsigned int port = wIndex-1;
>>> + u16 wPortChange, wPortStatus;
>>> +
>>> + switch (typeReq) {
>>> +
>>> + case GetHubStatus:
>>> + *(__le32 *) buf = cpu_to_le32(0);
>>> + len = 4; /* hub power */
>>> + break;
>>> +
>>> + case GetPortStatus:
>>> + if (wIndex > C67X00_PORTS)
>>> + return -EPIPE;
>>> +
>>> + status = c67x00_ll_usb_get_status(sie);
>>> + usb_status = c67x00_ll_get_usb_ctl(sie);
>>> +
>>> + wPortChange = 0;
>>> + if (status & PORT_CONNECT_CHANGE(port))
>>> + wPortChange |= USB_PORT_STAT_C_CONNECTION;
>>> +
>>> + wPortStatus = USB_PORT_STAT_POWER;
>>> + if (!(status & PORT_SE0_STATUS(port)))
>>> + wPortStatus |= USB_PORT_STAT_CONNECTION;
>>> + if (usb_status & LOW_SPEED_PORT(port)) {
>>> + wPortStatus |= USB_PORT_STAT_LOW_SPEED;
>>> + c67x00->low_speed_ports |= (1 << port);
>>> + } else
>>> + c67x00->low_speed_ports &= ~(1 << port);
>>> +
>>> + if (usb_status & SOF_EOP_EN(port))
>>> + wPortStatus |= USB_PORT_STAT_ENABLE;
>>> +
>>> + *(__le16 *) buf = cpu_to_le16(wPortStatus);
>>> + *(__le16 *) (buf + 2) = cpu_to_le16(wPortChange);
>>> + len = 4;
>>> + break;
>>> +
>>> + case SetHubFeature: /* We don't implement these */
>>> + case ClearHubFeature:
>>> + switch (wValue) {
>>> + case C_HUB_OVER_CURRENT:
>>> + case C_HUB_LOCAL_POWER:
>>> + len = 0;
>>> + break;
>>> +
>>> + default:
>>> + return -EPIPE;
>>> + }
>>> + break;
>>> +
>>> + case SetPortFeature:
>>> + if (wIndex > C67X00_PORTS)
>>> + return -EPIPE;
>>> +
>>> + switch (wValue) {
>>> + case USB_PORT_FEAT_SUSPEND:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "SetPortFeature %d (SUSPEND)\n", port);
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_RESET:
>>> + c67x00_hub_reset_host_port(sie, port);
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_POWER:
>>> + /* Power always enabled */
>>> + len = 0;
>>> + break;
>>> +
>>> + default:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "%s: SetPortFeature %d (0x%04x) Error!\n",
>>> + __func__, port, wValue);
>>> + return -EPIPE;
>>> + }
>>> + break;
>>> +
>>> + case ClearPortFeature:
>>> + if (wIndex > C67X00_PORTS)
>>> + return -EPIPE;
>>> +
>>> + switch (wValue) {
>>> + case USB_PORT_FEAT_ENABLE:
>>> + /* Reset the port so that the c67x00 also notices the
>>> + * disconnect */
>>> + c67x00_hub_reset_host_port(sie, port);
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_C_ENABLE:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "ClearPortFeature (%d): C_ENABLE\n", port);
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_SUSPEND:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "ClearPortFeature (%d): SUSPEND\n", port);
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_C_SUSPEND:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "ClearPortFeature (%d): C_SUSPEND\n", port);
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_POWER:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "ClearPortFeature (%d): POWER\n", port);
>>> + return -EPIPE;
>>> +
>>> + case USB_PORT_FEAT_C_CONNECTION:
>>> + c67x00_ll_usb_clear_status(sie,
>>> + PORT_CONNECT_CHANGE(port));
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_C_OVER_CURRENT:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "ClearPortFeature (%d): OVER_CURRENT\n", port);
>>> + len = 0;
>>> + break;
>>> +
>>> + case USB_PORT_FEAT_C_RESET:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "ClearPortFeature (%d): C_RESET\n", port);
>>> + len = 0;
>>> + break;
>>> +
>>> + default:
>>> + dev_dbg(c67x00_hcd_dev(c67x00),
>>> + "%s: ClearPortFeature %d (0x%04x) Error!\n",
>>> + __func__, port, wValue);
>>> + return -EPIPE;
>>> + }
>>> + break;
>>> +
>>> + case GetHubDescriptor:
>>> + len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength);
>>> + memcpy(buf, c67x00_hub_des, len);
>>> + break;
>>> +
>>> + default:
>>> + dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__);
>>> + return -EPIPE;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +/* ---------------------------------------------------------------------
>>> + * Main part of host controller driver
>>> + */
>>> +
>>> +/**
>>> + * c67x00_hcd_irq
>>> + *
>>> + * This function is called from the interrupt handler in c67x00-drv.c
>>> + */
>>> +static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
>>> +{
>>> + struct c67x00_hcd *c67x00 = sie->private_data;
>>> + struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
>>> +
>>> + /* Handle sie message flags */
>>> + if (msg) {
>>> + if (msg & HUSB_TDListDone)
>>> + c67x00_sched_kick(c67x00);
>>> + else
>>> + dev_warn(c67x00_hcd_dev(c67x00),
>>> + "Unknown SIE msg flag(s): 0x%04x\n", msg);
>>> + }
>>> +
>>> + if (unlikely(hcd->state == HC_STATE_HALT))
>>> + return;
>>> +
>>> + if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
>>> + return;
>>> +
>>> + /* Handle Start of frame events */
>>> + if (int_status & SOFEOP_FLG(sie->sie_num)) {
>>> + c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
>>> + c67x00_sched_kick(c67x00);
>>> + set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
>>> + }
>>> +}
>>> +
>>> +/**
>>> + * c67x00_hcd_start: Host controller start hook
>>> + */
>>> +static int c67x00_hcd_start(struct usb_hcd *hcd)
>>> +{
>>> + hcd->uses_new_polling = 1;
>>> + hcd->state = HC_STATE_RUNNING;
>>> + hcd->poll_rh = 1;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +/**
>>> + * c67x00_hcd_stop: Host controller stop hook
>>> + */
>>> +static void c67x00_hcd_stop(struct usb_hcd *hcd)
>>> +{
>>> + /* Nothing to do */
>>> +}
>>> +
>>> +static int c67x00_hcd_get_frame(struct usb_hcd *hcd)
>>> +{
>>> + struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
>>> + u16 temp_val;
>>> +
>>> + dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__);
>>> + temp_val = c67x00_ll_husb_get_frame(c67x00->sie);
>>> + temp_val &= HOST_FRAME_MASK;
>>> + return temp_val ? (temp_val - 1) : HOST_FRAME_MASK;
>>> +}
>>> +
>>> +static struct hc_driver c67x00_hc_driver = {
>>> + .description = "c67x00-hcd",
>>> + .product_desc = "Cypress C67X00 Host Controller",
>>> + .hcd_priv_size = sizeof(struct c67x00_hcd),
>>> + .flags = HCD_USB11 | HCD_MEMORY,
>>> +
>>> + /*
>>> + * basic lifecycle operations
>>> + */
>>> + .start = c67x00_hcd_start,
>>> + .stop = c67x00_hcd_stop,
>>> +
>>> + /*
>>> + * managing i/o requests and associated device resources
>>> + */
>>> + .urb_enqueue = c67x00_urb_enqueue,
>>> + .urb_dequeue = c67x00_urb_dequeue,
>>> + .endpoint_disable = c67x00_endpoint_disable,
>>> +
>>> + /*
>>> + * scheduling support
>>> + */
>>> + .get_frame_number = c67x00_hcd_get_frame,
>>> +
>>> + /*
>>> + * root hub support
>>> + */
>>> + .hub_status_data = c67x00_hub_status_data,
>>> + .hub_control = c67x00_hub_control,
>>> +};
>>> +
>>> +/* ---------------------------------------------------------------------
>>> + * Setup/Teardown routines
>>> + */
>>> +
>>> +int c67x00_hcd_probe(struct c67x00_sie *sie)
>>> +{
>>> + struct c67x00_hcd *c67x00;
>>> + struct usb_hcd *hcd;
>>> + unsigned long flags;
>>> + int retval;
>>> +
>>> + if (usb_disabled())
>>> + return -ENODEV;
>>> +
>>> + hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie");
>>> + if (!hcd) {
>>> + retval = -ENOMEM;
>>> + goto err0;
>>> + }
>>> + c67x00 = hcd_to_c67x00_hcd(hcd);
>>> +
>>> + spin_lock_init(&c67x00->lock);
>>> + c67x00->sie = sie;
>>> +
>>> + INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]);
>>> + INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]);
>>> + INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]);
>>> + INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]);
>>> + c67x00->urb_count = 0;
>>> + INIT_LIST_HEAD(&c67x00->td_list);
>>> + c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num);
>>> + c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num);
>>> + c67x00->max_frame_bw = MAX_FRAME_BW_STD;
>>> +
>>> + c67x00_ll_husb_init_host_port(sie);
>>> +
>>> + init_completion(&c67x00->endpoint_disable);
>>> + retval = c67x00_sched_start_scheduler(c67x00);
>>> + if (retval)
>>> + goto err1;
>>> +
>>> + retval = usb_add_hcd(hcd, 0, 0);
>>> + if (retval) {
>>> + dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n",
>>> + __func__, retval);
>>> + goto err2;
>>> + }
>>> +
>>> + spin_lock_irqsave(&sie->lock, flags);
>>> + sie->private_data = c67x00;
>>> + sie->irq = c67x00_hcd_irq;
>>> + spin_unlock_irqrestore(&sie->lock, flags);
>>> +
>>> + return retval;
>>> +
>>> + err2:
>>> + c67x00_sched_stop_scheduler(c67x00);
>>> + err1:
>>> + usb_put_hcd(hcd);
>>> + err0:
>>> + return retval;
>>> +}
>>> +
>>> +/* may be called with controller, bus, and devices active */
>>> +void c67x00_hcd_remove(struct c67x00_sie *sie)
>>> +{
>>> + struct c67x00_hcd *c67x00 = sie->private_data;
>>> + struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
>>> +
>>> + c67x00_sched_stop_scheduler(c67x00);
>>> + usb_remove_hcd(hcd);
>>> + usb_put_hcd(hcd);
>>> +}
>>> Index: software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-hcd.h
>>> ===================================================================
>>> --- software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-hcd.h (revision 0)
>>> +++ software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-hcd.h (revision 0)
>>> @@ -0,0 +1,137 @@
>>> +/*
>>> + * c67x00-hcd.h: Cypress C67X00 USB HCD
>>> + *
>>> + * Copyright (C) 2006-2008 Barco N.V.
>>> + * Derived from the Cypress cy7c67200/300 ezusb linux driver and
>>> + * based on multiple host controller drivers inside the linux kernel.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License as published by
>>> + * the Free Software Foundation; either version 2 of the License, or
>>> + * (at your option) any later version.
>>> + *
>>> + * This program is distributed in the hope that it will be useful,
>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>>> + * GNU General Public License for more details.
>>> + *
>>> + * You should have received a copy of the GNU General Public License
>>> + * along with this program; if not, write to the Free Software
>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
>>> + * MA 02110-1301 USA.
>>> + */
>>> +
>>> +#ifndef _USB_C67X00_HCD_H
>>> +#define _USB_C67X00_HCD_H
>>> +
>>> +#include <linux/kernel.h>
>>> +#include <linux/spinlock.h>
>>> +#include <linux/list.h>
>>> +#include <linux/usb.h>
>>> +#include "../core/hcd.h"
>>> +#include "c67x00.h"
>>> +
>>> +/*
>>> + * The following parameters depend on the CPU speed, bus speed, ...
>>> + * These can be tuned for specific use cases, e.g. if isochronous transfers
>>> + * are very important, bandwith can be sacrificed to guarantee that the
>>> + * 1ms deadline will be met.
>>> + * If bulk transfers are important, the MAX_FRAME_BW can be increased,
>>> + * but some (or many) isochronous deadlines might not be met.
>>> + *
>>> + * The values are specified in bittime.
>>> + */
>>> +
>>> +/*
>>> + * The current implementation switches between _STD (default) and _ISO (when
>>> + * isochronous transfers are scheduled), in order to optimize the throughput
>>> + * in normal cicrumstances, but also provide good isochronous behaviour.
>>> + *
>>> + * Bandwidth is described in bit time so with a 12MHz USB clock and 1ms
>>> + * frames; there are 12000 bit times per frame.
>>> + */
>>> +
>>> +#define TOTAL_FRAME_BW 12000
>>> +#define DEFAULT_EOT 2250
>>> +
>>> +#define MAX_FRAME_BW_STD (TOTAL_FRAME_BW - DEFAULT_EOT)
>>> +#define MAX_FRAME_BW_ISO 2400
>>> +
>>> +/*
>>> + * Periodic transfers may only use 90% of the full frame, but as
>>> + * we currently don't even use 90% of the full frame, we may
>>> + * use the full usable time for periodic transfers.
>>> + */
>>> +#define MAX_PERIODIC_BW(full_bw) full_bw
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +struct c67x00_hcd {
>>> + spinlock_t lock;
>>> + struct c67x00_sie *sie;
>>> + unsigned int low_speed_ports; /* bitmask of low speed ports */
>>> + unsigned int urb_count;
>>> + unsigned int urb_iso_count;
>>> +
>>> + struct list_head list[4]; /* iso, int, ctrl, bulk */
>>> +#if PIPE_BULK != 3
>>> +#error "Sanity check failed, this code presumes PIPE_... to range from 0 to 3"
>>> +#endif
>>> +
>>> + /* USB bandwidth allocated to td_list */
>>> + int bandwidth_allocated;
>>> + /* USB bandwidth allocated for isoc/int transfer */
>>> + int periodic_bw_allocated;
>>> + struct list_head td_list;
>>> + int max_frame_bw;
>>> +
>>> + u16 td_base_addr;
>>> + u16 buf_base_addr;
>>> + u16 next_td_addr;
>>> + u16 next_buf_addr;
>>> +
>>> + struct tasklet_struct tasklet;
>>> +
>>> + struct completion endpoint_disable;
>>> +
>>> + u16 current_frame;
>>> + u16 last_frame;
>>> +};
>>> +
>>> +static inline struct c67x00_hcd *hcd_to_c67x00_hcd(struct usb_hcd *hcd)
>>> +{
>>> + return (struct c67x00_hcd *)(hcd->hcd_priv);
>>> +}
>>> +
>>> +static inline struct usb_hcd *c67x00_hcd_to_hcd(struct c67x00_hcd *c67x00)
>>> +{
>>> + return container_of((void *)c67x00, struct usb_hcd, hcd_priv);
>>> +}
>>> +
>>> +/* ---------------------------------------------------------------------
>>> + * Functions used by c67x00-drv
>>> + */
>>> +
>>> +int c67x00_hcd_probe(struct c67x00_sie *sie);
>>> +void c67x00_hcd_remove(struct c67x00_sie *sie);
>>> +
>>> +/* ---------------------------------------------------------------------
>>> + * Transfer Descriptor scheduling functions
>>> + */
>>> +//int c67x00_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
>>> +int c67x00_urb_enqueue(struct usb_hcd *hcd, struct usb_host_endpoint *hep,
>>> + struct urb *urb, gfp_t mem_flags);
>>> +
>>> +//int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
>>> +int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb);
>>> +void c67x00_endpoint_disable(struct usb_hcd *hcd,
>>> + struct usb_host_endpoint *ep);
>>> +
>>> +void c67x00_hcd_msg_received(struct c67x00_sie *sie, u16 msg);
>>> +void c67x00_sched_kick(struct c67x00_hcd *c67x00);
>>> +int c67x00_sched_start_scheduler(struct c67x00_hcd *c67x00);
>>> +void c67x00_sched_stop_scheduler(struct c67x00_hcd *c67x00);
>>> +
>>> +#define c67x00_hcd_dev(x) (c67x00_hcd_to_hcd(x)->self.controller)
>>> +
>>> +#endif /* _USB_C67X00_HCD_H */
>>> Index: software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-ll-hpi.c
>>> ===================================================================
>>> --- software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-ll-hpi.c (revision 0)
>>> +++ software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-ll-hpi.c (revision 0)
>>> @@ -0,0 +1,481 @@
>>> +/*
>>> + * c67x00-ll-hpi.c: Cypress C67X00 USB Low level interface using HPI
>>> + *
>>> + * Copyright (C) 2006-2008 Barco N.V.
>>> + * Derived from the Cypress cy7c67200/300 ezusb linux driver and
>>> + * based on multiple host controller drivers inside the linux kernel.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License as published by
>>> + * the Free Software Foundation; either version 2 of the License, or
>>> + * (at your option) any later version.
>>> + *
>>> + * This program is distributed in the hope that it will be useful,
>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>>> + * GNU General Public License for more details.
>>> + *
>>> + * You should have received a copy of the GNU General Public License
>>> + * along with this program; if not, write to the Free Software
>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
>>> + * MA 02110-1301 USA.
>>> + */
>>> +
>>> +#include <asm/byteorder.h>
>>> +#include <linux/io.h>
>>> +#include <linux/jiffies.h>
>>> +#include <linux/usb/c67x00.h>
>>> +#include "c67x00.h"
>>> +
>>> +#define COMM_REGS 14
>>> +
>>> +struct c67x00_lcp_int_data {
>>> + u16 regs[COMM_REGS];
>>> +};
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +/* Interface definitions */
>>> +
>>> +#define COMM_ACK 0x0FED
>>> +#define COMM_NAK 0xDEAD
>>> +
>>> +#define COMM_RESET 0xFA50
>>> +#define COMM_EXEC_INT 0xCE01
>>> +#define COMM_INT_NUM 0x01C2
>>> +
>>> +/* Registers 0 to COMM_REGS-1 */
>>> +#define COMM_R(x) (0x01C4 + 2 * (x))
>>> +
>>> +#define HUSB_SIE_pCurrentTDPtr(x) ((x) ? 0x01B2 : 0x01B0)
>>> +#define HUSB_SIE_pTDListDone_Sem(x) ((x) ? 0x01B8 : 0x01B6)
>>> +#define HUSB_pEOT 0x01B4
>>> +
>>> +/* Software interrupts */
>>> +/* 114, 115: */
>>> +#define HUSB_SIE_INIT_INT(x) ((x) ? 0x0073 : 0x0072)
>>> +#define HUSB_RESET_INT 0x0074
>>> +
>>> +#define SUSB_INIT_INT 0x0071
>>> +#define SUSB_INIT_INT_LOC (SUSB_INIT_INT * 2)
>>> +
>>> +/* -----------------------------------------------------------------------
>>> + * HPI implementation
>>> + *
>>> + * The c67x00 chip also support control via SPI or HSS serial
>>> + * interfaces. However, this driver assumes that register access can
>>> + * be performed from IRQ context. While this is a safe assuption with
>>> + * the HPI interface, it is not true for the serial interfaces.
>>> + */
>>> +
>>> +/* HPI registers */
>>> +#define HPI_DATA 0
>>> +#define HPI_MAILBOX 1
>>> +#define HPI_ADDR 2
>>> +#define HPI_STATUS 3
>>> +
>>> +static inline u16 hpi_read_reg(struct c67x00_device *dev, int reg)
>>> +{
>>> + return __raw_readw(dev->hpi.base + reg * dev->hpi.regstep);
>>> +}
>>> +
>>> +static inline void hpi_write_reg(struct c67x00_device *dev, int reg, u16 value)
>>> +{
>>> + __raw_writew(value, dev->hpi.base + reg * dev->hpi.regstep);
>>> +}
>>> +
>>> +static inline u16 hpi_read_word_nolock(struct c67x00_device *dev, u16 reg)
>>> +{
>>> + hpi_write_reg(dev, HPI_ADDR, reg);
>>> + return hpi_read_reg(dev, HPI_DATA);
>>> +}
>>> +
>>> +static u16 hpi_read_word(struct c67x00_device *dev, u16 reg)
>>> +{
>>> + u16 value;
>>> + unsigned long flags;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + value = hpi_read_word_nolock(dev, reg);
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +
>>> + return value;
>>> +}
>>> +
>>> +static void hpi_write_word_nolock(struct c67x00_device *dev, u16 reg, u16 value)
>>> +{
>>> + hpi_write_reg(dev, HPI_ADDR, reg);
>>> + hpi_write_reg(dev, HPI_DATA, value);
>>> +}
>>> +
>>> +static void hpi_write_word(struct c67x00_device *dev, u16 reg, u16 value)
>>> +{
>>> + unsigned long flags;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + hpi_write_word_nolock(dev, reg, value);
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +}
>>> +
>>> +/*
>>> + * Only data is little endian, addr has cpu endianess
>>> + */
>>> +static void hpi_write_words_le16(struct c67x00_device *dev, u16 addr,
>>> + __le16 *data, u16 count)
>>> +{
>>> + unsigned long flags;
>>> + int i;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> +
>>> + hpi_write_reg(dev, HPI_ADDR, addr);
>>> + for (i = 0; i < count; i++)
>>> + hpi_write_reg(dev, HPI_DATA, le16_to_cpu(*data++));
>>> +
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +}
>>> +
>>> +/*
>>> + * Only data is little endian, addr has cpu endianess
>>> + */
>>> +static void hpi_read_words_le16(struct c67x00_device *dev, u16 addr,
>>> + __le16 *data, u16 count)
>>> +{
>>> + unsigned long flags;
>>> + int i;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + hpi_write_reg(dev, HPI_ADDR, addr);
>>> + for (i = 0; i < count; i++)
>>> + *data++ = cpu_to_le16(hpi_read_reg(dev, HPI_DATA));
>>> +
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +}
>>> +
>>> +static void hpi_set_bits(struct c67x00_device *dev, u16 reg, u16 mask)
>>> +{
>>> + u16 value;
>>> + unsigned long flags;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + value = hpi_read_word_nolock(dev, reg);
>>> + hpi_write_word_nolock(dev, reg, value | mask);
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +}
>>> +
>>> +static void hpi_clear_bits(struct c67x00_device *dev, u16 reg, u16 mask)
>>> +{
>>> + u16 value;
>>> + unsigned long flags;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + value = hpi_read_word_nolock(dev, reg);
>>> + hpi_write_word_nolock(dev, reg, value & ~mask);
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +}
>>> +
>>> +static u16 hpi_recv_mbox(struct c67x00_device *dev)
>>> +{
>>> + u16 value;
>>> + unsigned long flags;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + value = hpi_read_reg(dev, HPI_MAILBOX);
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +
>>> + return value;
>>> +}
>>> +
>>> +static u16 hpi_send_mbox(struct c67x00_device *dev, u16 value)
>>> +{
>>> + unsigned long flags;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + hpi_write_reg(dev, HPI_MAILBOX, value);
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +
>>> + return value;
>>> +}
>>> +
>>> +u16 c67x00_ll_hpi_status(struct c67x00_device *dev)
>>> +{
>>> + u16 value;
>>> + unsigned long flags;
>>> +
>>> + spin_lock_irqsave(&dev->hpi.lock, flags);
>>> + value = hpi_read_reg(dev, HPI_STATUS);
>>> + spin_unlock_irqrestore(&dev->hpi.lock, flags);
>>> +
>>> + return value;
>>> +}
>>> +
>>> +void c67x00_ll_hpi_reg_init(struct c67x00_device *dev)
>>> +{
>>> + int i;
>>> +
>>> + hpi_recv_mbox(dev);
>>> + c67x00_ll_hpi_status(dev);
>>> + hpi_write_word(dev, HPI_IRQ_ROUTING_REG, 0);
>>> +
>>> + for (i = 0; i < C67X00_SIES; i++) {
>>> + hpi_write_word(dev, SIEMSG_REG(i), 0);
>>> + hpi_read_word(dev, SIEMSG_REG(i));
>>> + }
>>> +}
>>> +
>>> +void c67x00_ll_hpi_enable_sofeop(struct c67x00_sie *sie)
>>> +{
>>> + hpi_set_bits(sie->dev, HPI_IRQ_ROUTING_REG,
>>> + SOFEOP_TO_HPI_EN(sie->sie_num));
>>> +}
>>> +
>>> +void c67x00_ll_hpi_disable_sofeop(struct c67x00_sie *sie)
>>> +{
>>> + hpi_clear_bits(sie->dev, HPI_IRQ_ROUTING_REG,
>>> + SOFEOP_TO_HPI_EN(sie->sie_num));
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +/* Transactions */
>>> +
>>> +static inline u16 ll_recv_msg(struct c67x00_device *dev)
>>> +{
>>> + u16 res;
>>> +
>>> + res = wait_for_completion_timeout(&dev->hpi.lcp.msg_received, 5 * HZ);
>>> + WARN_ON(!res);
>>> +
>>> + return (res == 0) ? -EIO : 0;
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +/* General functions */
>>> +
>>> +u16 c67x00_ll_fetch_siemsg(struct c67x00_device *dev, int sie_num)
>>> +{
>>> + u16 val;
>>> +
>>> + val = hpi_read_word(dev, SIEMSG_REG(sie_num));
>>> + /* clear register to allow next message */
>>> + hpi_write_word(dev, SIEMSG_REG(sie_num), 0);
>>> +
>>> + return val;
>>> +}
>>> +
>>> +u16 c67x00_ll_get_usb_ctl(struct c67x00_sie *sie)
>>> +{
>>> + return hpi_read_word(sie->dev, USB_CTL_REG(sie->sie_num));
>>> +}
>>> +
>>> +/**
>>> + * c67x00_ll_usb_clear_status - clear the USB status bits
>>> + */
>>> +void c67x00_ll_usb_clear_status(struct c67x00_sie *sie, u16 bits)
>>> +{
>>> + hpi_write_word(sie->dev, USB_STAT_REG(sie->sie_num), bits);
>>> +}
>>> +
>>> +u16 c67x00_ll_usb_get_status(struct c67x00_sie *sie)
>>> +{
>>> + return hpi_read_word(sie->dev, USB_STAT_REG(sie->sie_num));
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +static int c67x00_comm_exec_int(struct c67x00_device *dev, u16 nr,
>>> + struct c67x00_lcp_int_data *data)
>>> +{
>>> + int i, rc;
>>> +
>>> + mutex_lock(&dev->hpi.lcp.mutex);
>>> + hpi_write_word(dev, COMM_INT_NUM, nr);
>>> + for (i = 0; i < COMM_REGS; i++)
>>> + hpi_write_word(dev, COMM_R(i), data->regs[i]);
>>> + hpi_send_mbox(dev, COMM_EXEC_INT);
>>> + rc = ll_recv_msg(dev);
>>> + mutex_unlock(&dev->hpi.lcp.mutex);
>>> +
>>> + return rc;
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +/* Host specific functions */
>>> +
>>> +void c67x00_ll_set_husb_eot(struct c67x00_device *dev, u16 value)
>>> +{
>>> + mutex_lock(&dev->hpi.lcp.mutex);
>>> + hpi_write_word(dev, HUSB_pEOT, value);
>>> + mutex_unlock(&dev->hpi.lcp.mutex);
>>> +}
>>> +
>>> +static inline void c67x00_ll_husb_sie_init(struct c67x00_sie *sie)
>>> +{
>>> + struct c67x00_device *dev = sie->dev;
>>> + struct c67x00_lcp_int_data data;
>>> + int rc;
>>> +
>>> + rc = c67x00_comm_exec_int(dev, HUSB_SIE_INIT_INT(sie->sie_num), &data);
>>> + BUG_ON(rc); /* No return path for error code; crash spectacularly */
>>> +}
>>> +
>>> +void c67x00_ll_husb_reset(struct c67x00_sie *sie, int port)
>>> +{
>>> + struct c67x00_device *dev = sie->dev;
>>> + struct c67x00_lcp_int_data data;
>>> + int rc;
>>> +
>>> + data.regs[0] = 50; /* Reset USB port for 50ms */
>>> + data.regs[1] = port | (sie->sie_num << 1);
>>> + rc = c67x00_comm_exec_int(dev, HUSB_RESET_INT, &data);
>>> + BUG_ON(rc); /* No return path for error code; crash spectacularly */
>>> +}
>>> +
>>> +void c67x00_ll_husb_set_current_td(struct c67x00_sie *sie, u16 addr)
>>> +{
>>> + hpi_write_word(sie->dev, HUSB_SIE_pCurrentTDPtr(sie->sie_num), addr);
>>> +}
>>> +
>>> +u16 c67x00_ll_husb_get_current_td(struct c67x00_sie *sie)
>>> +{
>>> + return hpi_read_word(sie->dev, HUSB_SIE_pCurrentTDPtr(sie->sie_num));
>>> +}
>>> +
>>> +u16 c67x00_ll_husb_get_frame(struct c67x00_sie *sie)
>>> +{
>>> + return hpi_read_word(sie->dev, HOST_FRAME_REG(sie->sie_num));
>>> +}
>>> +
>>> +void c67x00_ll_husb_init_host_port(struct c67x00_sie *sie)
>>> +{
>>> + /* Set port into host mode */
>>> + hpi_set_bits(sie->dev, USB_CTL_REG(sie->sie_num), HOST_MODE);
>>> + c67x00_ll_husb_sie_init(sie);
>>> + /* Clear interrupts */
>>> + c67x00_ll_usb_clear_status(sie, HOST_STAT_MASK);
>>> + /* Check */
>>> + if (!(hpi_read_word(sie->dev, USB_CTL_REG(sie->sie_num)) & HOST_MODE))
>>> + dev_warn(sie_dev(sie),
>>> + "SIE %d not set to host mode\n", sie->sie_num);
>>> +}
>>> +
>>> +void c67x00_ll_husb_reset_port(struct c67x00_sie *sie, int port)
>>> +{
>>> + /* Clear connect change */
>>> + c67x00_ll_usb_clear_status(sie, PORT_CONNECT_CHANGE(port));
>>> +
>>> + /* Enable interrupts */
>>> + hpi_set_bits(sie->dev, HPI_IRQ_ROUTING_REG,
>>> + SOFEOP_TO_CPU_EN(sie->sie_num));
>>> + hpi_set_bits(sie->dev, HOST_IRQ_EN_REG(sie->sie_num),
>>> + SOF_EOP_IRQ_EN | DONE_IRQ_EN);
>>> +
>>> + /* Enable pull down transistors */
>>> + hpi_set_bits(sie->dev, USB_CTL_REG(sie->sie_num), PORT_RES_EN(port));
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +void c67x00_ll_irq(struct c67x00_device *dev, u16 int_status)
>>> +{
>>> + if ((int_status & MBX_OUT_FLG) == 0)
>>> + return;
>>> +
>>> + dev->hpi.lcp.last_msg = hpi_recv_mbox(dev);
>>> + complete(&dev->hpi.lcp.msg_received);
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +int c67x00_ll_reset(struct c67x00_device *dev)
>>> +{
>>> + int rc;
>>> +
>>> + mutex_lock(&dev->hpi.lcp.mutex);
>>> + hpi_send_mbox(dev, COMM_RESET);
>>> + rc = ll_recv_msg(dev);
>>> + mutex_unlock(&dev->hpi.lcp.mutex);
>>> +
>>> + return rc;
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/**
>>> + * c67x00_ll_write_mem_le16 - write into c67x00 memory
>>> + * Only data is little endian, addr has cpu endianess.
>>> + */
>>> +void c67x00_ll_write_mem_le16(struct c67x00_device *dev, u16 addr,
>>> + void *data, int len)
>>> +{
>>> + u8 *buf = data;
>>> +
>>> + /* Sanity check */
>>> + if (addr + len > 0xffff) {
>>> + dev_err(&dev->pdev->dev,
>>> + "Trying to write beyond writable region!\n");
>>> + return;
>>> + }
>>> +
>>> + if (addr & 0x01) {
>>> + /* unaligned access */
>>> + u16 tmp;
>>> + tmp = hpi_read_word(dev, addr - 1);
>>> + tmp = (tmp & 0x00ff) | (*buf++ << 8);
>>> + hpi_write_word(dev, addr - 1, tmp);
>>> + addr++;
>>> + len--;
>>> + }
>>> +
>>> + hpi_write_words_le16(dev, addr, (__le16 *)buf, len / 2);
>>> + buf += len & ~0x01;
>>> + addr += len & ~0x01;
>>> + len &= 0x01;
>>> +
>>> + if (len) {
>>> + u16 tmp;
>>> + tmp = hpi_read_word(dev, addr);
>>> + tmp = (tmp & 0xff00) | *buf;
>>> + hpi_write_word(dev, addr, tmp);
>>> + }
>>> +}
>>> +
>>> +/**
>>> + * c67x00_ll_read_mem_le16 - read from c67x00 memory
>>> + * Only data is little endian, addr has cpu endianess.
>>> + */
>>> +void c67x00_ll_read_mem_le16(struct c67x00_device *dev, u16 addr,
>>> + void *data, int len)
>>> +{
>>> + u8 *buf = data;
>>> +
>>> + if (addr & 0x01) {
>>> + /* unaligned access */
>>> + u16 tmp;
>>> + tmp = hpi_read_word(dev, addr - 1);
>>> + *buf++ = (tmp >> 8) & 0x00ff;
>>> + addr++;
>>> + len--;
>>> + }
>>> +
>>> + hpi_read_words_le16(dev, addr, (__le16 *)buf, len / 2);
>>> + buf += len & ~0x01;
>>> + addr += len & ~0x01;
>>> + len &= 0x01;
>>> +
>>> + if (len) {
>>> + u16 tmp;
>>> + tmp = hpi_read_word(dev, addr);
>>> + *buf = tmp & 0x00ff;
>>> + }
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +void c67x00_ll_init(struct c67x00_device *dev)
>>> +{
>>> + mutex_init(&dev->hpi.lcp.mutex);
>>> + init_completion(&dev->hpi.lcp.msg_received);
>>> +}
>>> +
>>> +void c67x00_ll_release(struct c67x00_device *dev)
>>> +{
>>> +}
>>> Index: software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-sched.c
>>> ===================================================================
>>> --- software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-sched.c (revision 0)
>>> +++ software/linux-2.6.x-petalogix/drivers/usb/c67x00/c67x00-sched.c (revision 0)
>>> @@ -0,0 +1,1211 @@
>>> +/*
>>> + * c67x00-sched.c: Cypress C67X00 USB Host Controller Driver - TD scheduling
>>> + *
>>> + * Copyright (C) 2006-2008 Barco N.V.
>>> + * Derived from the Cypress cy7c67200/300 ezusb linux driver and
>>> + * based on multiple host controller drivers inside the linux kernel.
>>> + *
>>> + * This program is free software; you can redistribute it and/or modify
>>> + * it under the terms of the GNU General Public License as published by
>>> + * the Free Software Foundation; either version 2 of the License, or
>>> + * (at your option) any later version.
>>> + *
>>> + * This program is distributed in the hope that it will be useful,
>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>>> + * GNU General Public License for more details.
>>> + *
>>> + * You should have received a copy of the GNU General Public License
>>> + * along with this program; if not, write to the Free Software
>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
>>> + * MA 02110-1301 USA.
>>> + */
>>> +
>>> +#include <linux/kthread.h>
>>> +#include <linux/kernel.h>
>>> +
>>> +#include "c67x00.h"
>>> +#include "c67x00-hcd.h"
>>> +
>>> +//#define DEBUG
>>> +
>>> +/*
>>> + * These are the stages for a control urb, they are kept
>>> + * in both urb->interval and td->privdata.
>>> + */
>>> +#define SETUP_STAGE 0
>>> +#define DATA_STAGE 1
>>> +#define STATUS_STAGE 2
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/**
>>> + * struct c67x00_ep_data: Host endpoint data structure
>>> + */
>>> +struct c67x00_ep_data {
>>> + struct list_head queue;
>>> + struct list_head node;
>>> + struct usb_host_endpoint *hep;
>>> + struct usb_device *dev;
>>> + u16 next_frame; /* For int/isoc transactions */
>>> +};
>>> +
>>> +/**
>>> + * struct c67x00_td
>>> + *
>>> + * Hardware parts are little endiannes, SW in CPU endianess.
>>> + */
>>> +struct c67x00_td {
>>> + /* HW specific part */
>>> + __le16 ly_base_addr; /* Bytes 0-1 */
>>> + __le16 port_length; /* Bytes 2-3 */
>>> + u8 pid_ep; /* Byte 4 */
>>> + u8 dev_addr; /* Byte 5 */
>>> + u8 ctrl_reg; /* Byte 6 */
>>> + u8 status; /* Byte 7 */
>>> + u8 retry_cnt; /* Byte 8 */
>>> +#define TT_OFFSET 2
>>> +#define TT_CONTROL 0
>>> +#define TT_ISOCHRONOUS 1
>>> +#define TT_BULK 2
>>> +#define TT_INTERRUPT 3
>>> + u8 residue; /* Byte 9 */
>>> + __le16 next_td_addr; /* Bytes 10-11 */
>>> + /* SW part */
>>> + struct list_head td_list;
>>> + u16 td_addr;
>>> + void *data;
>>> + struct urb *urb;
>>> + unsigned long privdata;
>>> +
>>> + /* These are needed for handling the toggle bits:
>>> + * an urb can be dequeued while a td is in progress
>>> + * after checking the td, the toggle bit might need to
>>> + * be fixed */
>>> + struct c67x00_ep_data *ep_data;
>>> + unsigned int pipe;
>>> +};
>>> +
>>> +struct c67x00_urb_priv {
>>> + struct list_head hep_node;
>>> + struct urb *urb;
>>> + int port;
>>> + int cnt; /* packet number for isoc */
>>> + int status;
>>> + struct c67x00_ep_data *ep_data;
>>> +};
>>> +
>>> +#define td_udev(td) ((td)->ep_data->dev)
>>> +
>>> +#define CY_TD_SIZE 12
>>> +
>>> +#define TD_PIDEP_OFFSET 0x04
>>> +#define TD_PIDEPMASK_PID 0xF0
>>> +#define TD_PIDEPMASK_EP 0x0F
>>> +#define TD_PORTLENMASK_DL 0x02FF
>>> +#define TD_PORTLENMASK_PN 0xC000
>>> +
>>> +#define TD_STATUS_OFFSET 0x07
>>> +#define TD_STATUSMASK_ACK 0x01
>>> +#define TD_STATUSMASK_ERR 0x02
>>> +#define TD_STATUSMASK_TMOUT 0x04
>>> +#define TD_STATUSMASK_SEQ 0x08
>>> +#define TD_STATUSMASK_SETUP 0x10
>>> +#define TD_STATUSMASK_OVF 0x20
>>> +#define TD_STATUSMASK_NAK 0x40
>>> +#define TD_STATUSMASK_STALL 0x80
>>> +
>>> +#define TD_ERROR_MASK (TD_STATUSMASK_ERR | TD_STATUSMASK_TMOUT | \
>>> + TD_STATUSMASK_STALL)
>>> +
>>> +#define TD_RETRYCNT_OFFSET 0x08
>>> +#define TD_RETRYCNTMASK_ACT_FLG 0x10
>>> +#define TD_RETRYCNTMASK_TX_TYPE 0x0C
>>> +#define TD_RETRYCNTMASK_RTY_CNT 0x03
>>> +
>>> +#define TD_RESIDUE_OVERFLOW 0x80
>>> +
>>> +#define TD_PID_IN 0x90
>>> +
>>> +/* Residue: signed 8bits, neg -> OVERFLOW, pos -> UNDERFLOW */
>>> +#define td_residue(td) ((__s8)(td->residue))
>>> +#define td_ly_base_addr(td) (__le16_to_cpu((td)->ly_base_addr))
>>> +#define td_port_length(td) (__le16_to_cpu((td)->port_length))
>>> +#define td_next_td_addr(td) (__le16_to_cpu((td)->next_td_addr))
>>> +
>>> +#define td_active(td) ((td)->retry_cnt & TD_RETRYCNTMASK_ACT_FLG)
>>> +#define td_length(td) (td_port_length(td) & TD_PORTLENMASK_DL)
>>> +
>>> +#define td_sequence_ok(td) (!td->status || \
>>> + (!(td->status & TD_STATUSMASK_SEQ) == \
>>> + !(td->ctrl_reg & SEQ_SEL)))
>>> +
>>> +#define td_acked(td) (!td->status || \
>>> + (td->status & TD_STATUSMASK_ACK))
>>> +#define td_actual_bytes(td) (td_length(td) - td_residue(td))
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +#ifdef DEBUG
>>> +
>>> +/**
>>> + * dbg_td - Dump the contents of the TD
>>> + */
>>> +static void dbg_td(struct c67x00_hcd *c67x00, struct c67x00_td *td, char *msg)
>>> +{
>>> + struct device *dev = c67x00_hcd_dev(c67x00);
>>> + int i, len = td_length(td);
>>> + unsigned char *k;
>>> + dev_dbg(dev, "### %s at 0x%04x\n", msg, td->td_addr);
>>> + dev_dbg(dev, "urb: 0x%p\n", td->urb);
>>> + dev_dbg(dev, "endpoint: %4d\n", usb_pipeendpoint(td->pipe));
>>> + dev_dbg(dev, "pipeout: %4d\n", usb_pipeout(td->pipe));
>>> + dev_dbg(dev, "ly_base_addr: 0x%04x\n", td_ly_base_addr(td));
>>> + dev_dbg(dev, "port_length: 0x%04x\n", td_port_length(td));
>>> + dev_dbg(dev, "pid_ep: 0x%02x\n", td->pid_ep);
>>> + dev_dbg(dev, "dev_addr: 0x%02x\n", td->dev_addr);
>>> + dev_dbg(dev, "ctrl_reg: 0x%02x\n", td->ctrl_reg);
>>> + dev_dbg(dev, "status: 0x%02x\n", td->status);
>>> + dev_dbg(dev, "retry_cnt: 0x%02x\n", td->retry_cnt);
>>> + dev_dbg(dev, "residue: 0x%02x\n", td->residue);
>>> + dev_dbg(dev, "next_td_addr: 0x%04x\n", td_next_td_addr(td));
>>> + dev_dbg(dev, "data:");
>>> + for (i = 0; i < len; i++) {
>>> + if (!(i % 8))
>>> + printk("\n ");
>>> + k = (td->data + i);
>>> + printk(" 0x%02x", *k);
>>> + }
>>> + printk("\n");
>>> +}
>>> +#else /* DEBUG */
>>> +
>>> +static inline void
>>> +dbg_td(struct c67x00_hcd *c67x00, struct c67x00_td *td, char *msg) { }
>>> +
>>> +#endif /* DEBUG */
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +/* Helper functions */
>>> +
>>> +static inline u16 c67x00_get_current_frame_number(struct c67x00_hcd *c67x00)
>>> +{
>>> + return c67x00_ll_husb_get_frame(c67x00->sie) & HOST_FRAME_MASK;
>>> +}
>>> +
>>> +/**
>>> + * frame_add
>>> + * Software wraparound for framenumbers.
>>> + */
>>> +static inline u16 frame_add(u16 a, u16 b)
>>> +{
>>> + return (a + b) & HOST_FRAME_MASK;
>>> +}
>>> +
>>> +/**
>>> + * frame_after - is frame a after frame b
>>> + */
>>> +static inline int frame_after(u16 a, u16 b)
>>> +{
>>> + return ((HOST_FRAME_MASK + a - b) & HOST_FRAME_MASK) <
>>> + (HOST_FRAME_MASK / 2);
>>> +}
>>> +
>>> +/**
>>> + * frame_after_eq - is frame a after or equal to frame b
>>> + */
>>> +static inline int frame_after_eq(u16 a, u16 b)
>>> +{
>>> + return ((HOST_FRAME_MASK + 1 + a - b) & HOST_FRAME_MASK) <
>>> + (HOST_FRAME_MASK / 2);
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/**
>>> + * c67x00_release_urb - remove link from all tds to this urb
>>> + * Disconnects the urb from it's tds, so that it can be given back.
>>> + * pre: urb->hcpriv != NULL
>>> + */
>>> +static void c67x00_release_urb(struct c67x00_hcd *c67x00, struct urb *urb)
>>> +{
>>> + struct c67x00_td *td;
>>> + struct c67x00_urb_priv *urbp;
>>> +
>>> + BUG_ON(!urb);
>>> +
>>> + c67x00->urb_count--;
>>> +
>>> + if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
>>> + c67x00->urb_iso_count--;
>>> + if (c67x00->urb_iso_count == 0)
>>> + c67x00->max_frame_bw = MAX_FRAME_BW_STD;
>>> + }
>>> +
>>> + /* TODO this might be not so efficient when we've got many urbs!
>>> + * Alternatives:
>>> + * * only clear when needed
>>> + * * keep a list of tds with each urbp
>>> + */
>>> + list_for_each_entry(td, &c67x00->td_list, td_list)
>>> + if (urb == td->urb)
>>> + td->urb = NULL;
>>> +
>>> + urbp = urb->hcpriv;
>>> + urb->hcpriv = NULL;
>>> + list_del(&urbp->hep_node);
>>> + kfree(urbp);
>>> +}
>>> +
>>> +/* --------------------------------------------------------------------------
>>> + * This function is to get endpoint from pipe in urb struct. This will be
>>> + * in higher linux version which includes endpoint in urb struct.
>>> + * -------------------------------------------------------------------------- */
>>> +static struct usb_host_endpoint *
>>> +c67x00_get_ep(struct urb *urb)
>>> +{
>>> + unsigned epnum = 0;
>>> + if (urb == 0)
>>> + return 0;
>>> + epnum = usb_pipeendpoint(urb->pipe);
>>> + if (usb_pipein(urb->pipe))
>>> + return urb->dev->ep_in[epnum];
>>> + else
>>> + return urb->dev->ep_out[epnum];
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +static struct c67x00_ep_data *
>>> +c67x00_ep_data_alloc(struct c67x00_hcd *c67x00, struct urb *urb)
>>> +{
>>> + struct usb_host_endpoint *hep = c67x00_get_ep(urb);
>>> + struct c67x00_ep_data *ep_data;
>>> + int type;
>>> +
>>> + if (hep == 0)
>>> + return 0;
>>> +
>>> + c67x00->current_frame = c67x00_get_current_frame_number(c67x00);
>>> +
>>> + /* Check if endpoint already has a c67x00_ep_data struct allocated */
>>> + if (hep->hcpriv) {
>>> + ep_data = hep->hcpriv;
>>> + if (frame_after(c67x00->current_frame, ep_data->next_frame))
>>> + ep_data->next_frame =
>>> + frame_add(c67x00->current_frame, 1);
>>> + return hep->hcpriv;
>>> + }
>>> +
>>> + /* Allocate and initialize a new c67x00 endpoint data structure */
>>> + ep_data = kzalloc(sizeof(*ep_data), GFP_ATOMIC);
>>> + if (!ep_data)
>>> + return NULL;
>>> +
>>> + INIT_LIST_HEAD(&ep_data->queue);
>>> + INIT_LIST_HEAD(&ep_data->node);
>>> + ep_data->hep = hep;
>>> +
>>> + /* hold a reference to udev as long as this endpoint lives,
>>> + * this is needed to possibly fix the data toggle */
>>> + ep_data->dev = usb_get_dev(urb->dev);
>>> + hep->hcpriv = ep_data;
>>> +
>>> + /* For ISOC and INT endpoints, start ASAP: */
>>> + ep_data->next_frame = frame_add(c67x00->current_frame, 1);
>>> +
>>> + /* Add the endpoint data to one of the pipe lists; must be added
>>> + in order of endpoint address */
>>> + type = usb_pipetype(urb->pipe);
>>> + if (list_empty(&ep_data->node)) {
>>> + list_add(&ep_data->node, &c67x00->list[type]);
>>> + } else {
>>> + struct c67x00_ep_data *prev;
>>> +
>>> + list_for_each_entry(prev, &c67x00->list[type], node) {
>>> + if (prev->hep->desc.bEndpointAddress >
>>> + hep->desc.bEndpointAddress) {
>>> + list_add(&ep_data->node, prev->node.prev);
>>> + break;
>>> + }
>>> + }
>>> + }
>>> +
>>> + return ep_data;
>>> +}
>>> +
>>> +static int c67x00_ep_data_free(struct usb_host_endpoint *hep)
>>> +{
>>> + struct c67x00_ep_data *ep_data = hep->hcpriv;
>>> +
>>> + if (!ep_data)
>>> + return 0;
>>> +
>>> + if (!list_empty(&ep_data->queue))
>>> + return -EBUSY;
>>> +
>>> + usb_put_dev(ep_data->dev);
>>> + list_del(&ep_data->queue);
>>> + list_del(&ep_data->node);
>>> +
>>> + kfree(ep_data);
>>> + hep->hcpriv = NULL;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +void c67x00_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
>>> +{
>>> + struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
>>> + unsigned long flags;
>>> +
>>> + if (!list_empty(&ep->urb_list))
>>> + dev_warn(c67x00_hcd_dev(c67x00), "error: urb list not empty\n");
>>> +
>>> + spin_lock_irqsave(&c67x00->lock, flags);
>>> +
>>> + /* loop waiting for all transfers in the endpoint queue to complete */
>>> + while (c67x00_ep_data_free(ep)) {
>>> + /* Drop the lock so we can sleep waiting for the hardware */
>>> + spin_unlock_irqrestore(&c67x00->lock, flags);
>>> +
>>> + /* it could happen that we reinitialize this completion, while
>>> + * somebody was waiting for that completion. The timeout and
>>> + * while loop handle such cases, but this might be improved */
>>> + INIT_COMPLETION(c67x00->endpoint_disable);
>>> + c67x00_sched_kick(c67x00);
>>> + wait_for_completion_timeout(&c67x00->endpoint_disable, 1 * HZ);
>>> +
>>> + spin_lock_irqsave(&c67x00->lock, flags);
>>> + }
>>> +
>>> + spin_unlock_irqrestore(&c67x00->lock, flags);
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +static inline int get_root_port(struct usb_device *dev)
>>> +{
>>> + while (dev->parent->parent)
>>> + dev = dev->parent;
>>> + return dev->portnum;
>>> +}
>>> +
>>> +int c67x00_urb_enqueue(struct usb_hcd *hcd,
>>> + struct usb_host_endpoint *hep,
>>> + struct urb *urb, gfp_t mem_flags)
>>> +{
>>> + int ret;
>>> + unsigned long flags;
>>> + struct c67x00_urb_priv *urbp;
>>> + struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
>>> + int port = get_root_port(urb->dev)-1;
>>> +
>>> + spin_lock_irqsave(&c67x00->lock, flags);
>>> +
>>> + /* Make sure host controller is running */
>>> + if (!HC_IS_RUNNING(hcd->state)) {
>>> + ret = -ENODEV;
>>> + goto err_not_linked;
>>> + }
>>> +
>>> +// ret = usb_hcd_link_urb_to_ep(hcd, urb);
>>> +// if (ret)
>>> +// goto err_not_linked;
>>> +
>>> + /* Allocate and initialize urb private data */
>>> + urbp = kzalloc(sizeof(*urbp), mem_flags);
>>> + if (!urbp) {
>>> + ret = -ENOMEM;
>>> + goto err_urbp;
>>> + }
>>> +
>>> + INIT_LIST_HEAD(&urbp->hep_node);
>>> + urbp->urb = urb;
>>> + urbp->port = port;
>>> +
>>> + urbp->ep_data = c67x00_ep_data_alloc(c67x00, urb);
>>> +
>>> + if (!urbp->ep_data) {
>>> + ret = -ENOMEM;
>>> + goto err_epdata;
>>> + }
>>> +
>>> + /* TODO claim bandwidth with usb_claim_bandwidth?
>>> + * also release it somewhere! */
>>> +
>>> + urb->hcpriv = urbp;
>>> +
>>> + urb->actual_length = 0; /* Nothing received/transmitted yet */
>>> +
>>> + switch (usb_pipetype(urb->pipe)) {
>>> + case PIPE_CONTROL:
>>> + urb->interval = SETUP_STAGE;
>>> + break;
>>> + case PIPE_INTERRUPT:
>>> + break;
>>> + case PIPE_BULK:
>>> + break;
>>> + case PIPE_ISOCHRONOUS:
>>> + if (c67x00->urb_iso_count == 0)
>>> + c67x00->max_frame_bw = MAX_FRAME_BW_ISO;
>>> + c67x00->urb_iso_count++;
>>> + /* Assume always URB_ISO_ASAP, FIXME */
>>> + if (list_empty(&urbp->ep_data->queue))
>>> + urb->start_frame = urbp->ep_data->next_frame;
>>> + else {
>>> + /* Go right after the last one */
>>> + struct urb *last_urb;
>>> +
>>> + last_urb = list_entry(urbp->ep_data->queue.prev,
>>> + struct c67x00_urb_priv,
>>> + hep_node)->urb;
>>> + urb->start_frame =
>>> + frame_add(last_urb->start_frame,
>>> + last_urb->number_of_packets *
>>> + last_urb->interval);
>>> + }
>>> + urbp->cnt = 0;
>>> + break;
>>> + }
>>> +
>>> + /* Add the URB to the endpoint queue */
>>> + list_add_tail(&urbp->hep_node, &urbp->ep_data->queue);
>>> +
>>> + /* If this is the only URB, kick start the controller */
>>> + if (!c67x00->urb_count++)
>>> + c67x00_ll_hpi_enable_sofeop(c67x00->sie);
>>> +
>>> + c67x00_sched_kick(c67x00);
>>> + spin_unlock_irqrestore(&c67x00->lock, flags);
>>> +
>>> + return 0;
>>> +
>>> +err_epdata:
>>> + kfree(urbp);
>>> +err_urbp:
>>> +// usb_hcd_unlink_urb_from_ep(hcd, urb);
>>> + usb_hcd_giveback_urb(hcd, urb);
>>> +err_not_linked:
>>> + spin_unlock_irqrestore(&c67x00->lock, flags);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
>>> +{
>>> + struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
>>> + struct usb_host_endpoint *hep = c67x00_get_ep(urb);
>>> + unsigned long flags;
>>> +// int rc;
>>> +
>>> + spin_lock_irqsave(&c67x00->lock, flags);
>>> +// rc = usb_hcd_check_unlink_urb(hcd, urb, status);
>>> +// if (rc)
>>> +// goto done;
>>> +
>>> +// hep = urb->hcpriv;
>>> + /* URB already unlinked (or never linked)? */
>>> + if (!hep) {
>>> + goto done;
>>> + }
>>> +
>>> + c67x00_release_urb(c67x00, urb);
>>> +// usb_hcd_unlink_urb_from_ep(hcd, urb);
>>> +
>>> + spin_unlock(&c67x00->lock);
>>> + usb_hcd_giveback_urb(hcd, urb);
>>> + spin_lock(&c67x00->lock);
>>> +
>>> + spin_unlock_irqrestore(&c67x00->lock, flags);
>>> +
>>> + return 0;
>>> +
>>> + done:
>>> + spin_unlock_irqrestore(&c67x00->lock, flags);
>>> + return 0;
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/*
>>> + * pre: c67x00 locked, urb unlocked
>>> + */
>>> +static void
>>> +c67x00_giveback_urb(struct c67x00_hcd *c67x00, struct urb *urb, int status)
>>> +{
>>> + struct c67x00_urb_priv *urbp;
>>> +
>>> + if (!urb)
>>> + return;
>>> +
>>> + urbp = urb->hcpriv;
>>> + urbp->status = status;
>>> +
>>> + list_del_init(&urbp->hep_node);
>>> +
>>> + c67x00_release_urb(c67x00, urb);
>>> +// usb_hcd_unlink_urb_from_ep(c67x00_hcd_to_hcd(c67x00), urb);
>>> + spin_unlock(&c67x00->lock);
>>> + usb_hcd_giveback_urb(c67x00_hcd_to_hcd(c67x00), urb);
>>> + spin_lock(&c67x00->lock);
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +static int c67x00_claim_frame_bw(struct c67x00_hcd *c67x00, struct urb *urb,
>>> + int len, int periodic)
>>> +{
>>> + struct c67x00_urb_priv *urbp = urb->hcpriv;
>>> + int bit_time;
>>> +
>>> + /* According to the C67x00 BIOS user manual, page 3-18,19, the
>>> + * following calculations provide the full speed bit times for
>>> + * a transaction.
>>> + *
>>> + * FS(in) = 112.5 + 9.36*BC + HOST_DELAY
>>> + * FS(in,iso) = 90.5 + 9.36*BC + HOST_DELAY
>>> + * FS(out) = 112.5 + 9.36*BC + HOST_DELAY
>>> + * FS(out,iso) = 78.4 + 9.36*BC + HOST_DELAY
>>> + * LS(in) = 802.4 + 75.78*BC + HOST_DELAY
>>> + * LS(out) = 802.6 + 74.67*BC + HOST_DELAY
>>> + *
>>> + * HOST_DELAY == 106 for the c67200 and c67300.
>>> + */
>>> +
>>> + /* make calculations in 1/100 bit times to maintain resolution */
>>> + if (urbp->ep_data->dev->speed == USB_SPEED_LOW) {
>>> + /* Low speed pipe */
>>> + if (usb_pipein(urb->pipe))
>>> + bit_time = 80240 + 7578*len;
>>> + else
>>> + bit_time = 80260 + 7467*len;
>>> + } else {
>>> + /* FS pipes */
>>> + if (usb_pipeisoc(urb->pipe))
>>> + bit_time = usb_pipein(urb->pipe) ? 9050 : 7840;
>>> + else
>>> + bit_time = 11250;
>>> + bit_time += 936*len;
>>> + }
>>> +
>>> + /* Scale back down to integer bit times. Use a host delay of 106.
>>> + * (this is the only place it is used) */
>>> + bit_time = ((bit_time+50) / 100) + 106;
>>> +
>>> + if (unlikely(bit_time + c67x00->bandwidth_allocated >=
>>> + c67x00->max_frame_bw))
>>> + return -EMSGSIZE;
>>> +
>>> + if (unlikely(c67x00->next_td_addr + CY_TD_SIZE >=
>>> + c67x00->td_base_addr + SIE_TD_SIZE))
>>> + return -EMSGSIZE;
>>> +
>>> + if (unlikely(c67x00->next_buf_addr + len >=
>>> + c67x00->buf_base_addr + SIE_TD_BUF_SIZE))
>>> + return -EMSGSIZE;
>>> +
>>> + if (periodic) {
>>> + if (unlikely(bit_time + c67x00->periodic_bw_allocated >=
>>> + MAX_PERIODIC_BW(c67x00->max_frame_bw)))
>>> + return -EMSGSIZE;
>>> + c67x00->periodic_bw_allocated += bit_time;
>>> + }
>>> +
>>> + c67x00->bandwidth_allocated += bit_time;
>>> + return 0;
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/**
>>> + * td_addr and buf_addr must be word aligned
>>> + */
>>> +static int c67x00_create_td(struct c67x00_hcd *c67x00, struct urb *urb,
>>> + void *data, int len, int pid, int toggle,
>>> + unsigned long privdata)
>>> +{
>>> + struct c67x00_td *td;
>>> + struct c67x00_urb_priv *urbp = urb->hcpriv;
>>> + const __u8 active_flag = 1, retry_cnt = 1;
>>> + __u8 cmd = 0;
>>> + int tt = 0;
>>> +
>>> + if (c67x00_claim_frame_bw(c67x00, urb, len, usb_pipeisoc(urb->pipe)
>>> + || usb_pipeint(urb->pipe)))
>>> + return -EMSGSIZE; /* Not really an error, but expected */
>>> +
>>> + td = kzalloc(sizeof(*td), GFP_ATOMIC);
>>> + if (!td)
>>> + return -ENOMEM;
>>> +
>>> + td->pipe = urb->pipe;
>>> + td->ep_data = urbp->ep_data;
>>> +
>>> + if ((td_udev(td)->speed == USB_SPEED_LOW) &&
>>> + !(c67x00->low_speed_ports & (1 << urbp->port)))
>>> + cmd |= PREAMBLE_EN;
>>> +
>>> + switch (usb_pipetype(td->pipe)) {
>>> + case PIPE_ISOCHRONOUS:
>>> + tt = TT_ISOCHRONOUS;
>>> + cmd |= ISO_EN;
>>> + break;
>>> + case PIPE_CONTROL:
>>> + tt = TT_CONTROL;
>>> + break;
>>> + case PIPE_BULK:
>>> + tt = TT_BULK;
>>> + break;
>>> + case PIPE_INTERRUPT:
>>> + tt = TT_INTERRUPT;
>>> + break;
>>> + }
>>> +
>>> + if (toggle)
>>> + cmd |= SEQ_SEL;
>>> +
>>> + cmd |= ARM_EN;
>>> +
>>> + /* SW part */
>>> + td->td_addr = c67x00->next_td_addr;
>>> + c67x00->next_td_addr = c67x00->next_td_addr + CY_TD_SIZE;
>>> +
>>> + /* HW part */
>>> + td->ly_base_addr = __cpu_to_le16(c67x00->next_buf_addr);
>>> + td->port_length = __cpu_to_le16((c67x00->sie->sie_num << 15) |
>>> + (urbp->port << 14) | (len & 0x3FF));
>>> + td->pid_ep = ((pid & 0xF) << TD_PIDEP_OFFSET) |
>>> + (usb_pipeendpoint(td->pipe) & 0xF);
>>> + td->dev_addr = usb_pipedevice(td->pipe) & 0x7F;
>>> + td->ctrl_reg = cmd;
>>> + td->status = 0;
>>> + td->retry_cnt = (tt << TT_OFFSET) | (active_flag << 4) | retry_cnt;
>>> + td->residue = 0;
>>> + td->next_td_addr = __cpu_to_le16(c67x00->next_td_addr);
>>> +
>>> + /* SW part */
>>> + td->data = data;
>>> + td->urb = urb;
>>> + td->urb->status = td->status;
>>> +
>>> + td->privdata = privdata;
>>> +
>>> + c67x00->next_buf_addr += (len + 1) & ~0x01; /* properly align */
>>> +
>>> + list_add_tail(&td->td_list, &c67x00->td_list);
>>> + return 0;
>>> +}
>>> +
>>> +static inline void c67x00_release_td(struct c67x00_td *td)
>>> +{
>>> + list_del_init(&td->td_list);
>>> + kfree(td);
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +static int c67x00_add_data_urb(struct c67x00_hcd *c67x00, struct urb *urb)
>>> +{
>>> + int remaining;
>>> + int toggle;
>>> + int pid;
>>> + int ret = 0;
>>> + int maxps;
>>> + int need_empty;
>>> +
>>> + toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
>>> + usb_pipeout(urb->pipe));
>>> + remaining = urb->transfer_buffer_length - urb->actual_length;
>>> +
>>> + maxps = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
>>> +
>>> + need_empty = (urb->transfer_flags & URB_ZERO_PACKET) &&
>>> + usb_pipeout(urb->pipe) && !(remaining % maxps);
>>> +
>>> + while (remaining || need_empty) {
>>> + int len;
>>> + char *td_buf;
>>> +
>>> + len = (remaining > maxps) ? maxps : remaining;
>>> + if (!len)
>>> + need_empty = 0;
>>> +
>>> + pid = usb_pipeout(urb->pipe) ? USB_PID_OUT : USB_PID_IN;
>>> + td_buf = urb->transfer_buffer + urb->transfer_buffer_length -
>>> + remaining;
>>> + ret = c67x00_create_td(c67x00, urb, td_buf, len, pid, toggle,
>>> + DATA_STAGE);
>>> + if (ret)
>>> + return ret; /* td wasn't created */
>>> +
>>> + toggle ^= 1;
>>> + remaining -= len;
>>> + if (usb_pipecontrol(urb->pipe))
>>> + break;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +/**
>>> + * return 0 in case more bandwidth is available, else errorcode
>>> + */
>>> +static int c67x00_add_ctrl_urb(struct c67x00_hcd *c67x00, struct urb *urb)
>>> +{
>>> + int ret;
>>> + int pid;
>>> +
>>> + switch (urb->interval) {
>>> + default:
>>> + case SETUP_STAGE:
>>> + ret = c67x00_create_td(c67x00, urb, urb->setup_packet,
>>> + 8, USB_PID_SETUP, 0, SETUP_STAGE);
>>> + if (ret)
>>> + return ret;
>>> + urb->interval = SETUP_STAGE;
>>> + usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
>>> + usb_pipeout(urb->pipe), 1);
>>> + break;
>>> + case DATA_STAGE:
>>> + if (urb->transfer_buffer_length) {
>>> + ret = c67x00_add_data_urb(c67x00, urb);
>>> + if (ret)
>>> + return ret;
>>> + break;
>>> + } /* else fallthrough */
>>> + case STATUS_STAGE:
>>> + pid = !usb_pipeout(urb->pipe) ? USB_PID_OUT : USB_PID_IN;
>>> + ret = c67x00_create_td(c67x00, urb, NULL, 0, pid, 1,
>>> + STATUS_STAGE);
>>> + if (ret)
>>> + return ret;
>>> + break;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +/*
>>> + * return 0 in case more bandwidth is available, else errorcode
>>> + */
>>> +static int c67x00_add_int_urb(struct c67x00_hcd *c67x00, struct urb *urb)
>>> +{
>>> + struct c67x00_urb_priv *urbp = urb->hcpriv;
>>> +
>>> + if (frame_after_eq(c67x00->current_frame, urbp->ep_data->next_frame)) {
>>> + urbp->ep_data->next_frame =
>>> + frame_add(urbp->ep_data->next_frame, urb->interval);
>>> + return c67x00_add_data_urb(c67x00, urb);
>>> + }
>>> + return 0;
>>> +}
>>> +
>>> +static int c67x00_add_iso_urb(struct c67x00_hcd *c67x00, struct urb *urb)
>>> +{
>>> + struct c67x00_urb_priv *urbp = urb->hcpriv;
>>> +
>>> + if (frame_after_eq(c67x00->current_frame, urbp->ep_data->next_frame)) {
>>> + char *td_buf;
>>> + int len, pid, ret;
>>> +
>>> + BUG_ON(urbp->cnt >= urb->number_of_packets);
>>> +
>>> + td_buf = urb->transfer_buffer +
>>> + urb->iso_frame_desc[urbp->cnt].offset;
>>> + len = urb->iso_frame_desc[urbp->cnt].length;
>>> + pid = usb_pipeout(urb->pipe) ? USB_PID_OUT : USB_PID_IN;
>>> +
>>> + ret = c67x00_create_td(c67x00, urb, td_buf, len, pid, 0,
>>> + urbp->cnt);
>>> + if (ret) {
>>> + printk(KERN_DEBUG "create failed: %d\n", ret);
>>> + urb->iso_frame_desc[urbp->cnt].actual_length = 0;
>>> + urb->iso_frame_desc[urbp->cnt].status = ret;
>>> + if (urbp->cnt + 1 == urb->number_of_packets)
>>> + c67x00_giveback_urb(c67x00, urb, 0);
>>> + }
>>> +
>>> + urbp->ep_data->next_frame =
>>> + frame_add(urbp->ep_data->next_frame, urb->interval);
>>> + urbp->cnt++;
>>> + }
>>> + return 0;
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +static void c67x00_fill_from_list(struct c67x00_hcd *c67x00, int type,
>>> + int (*add)(struct c67x00_hcd *, struct urb *))
>>> +{
>>> + struct c67x00_ep_data *ep_data;
>>> + struct urb *urb;
>>> +
>>> + /* traverse every endpoint on the list */
>>> + list_for_each_entry(ep_data, &c67x00->list[type], node) {
>>> + if (!list_empty(&ep_data->queue)) {
>>> + /* and add the first urb */
>>> + /* isochronous transfer rely on this */
>>> + urb = list_entry(ep_data->queue.next,
>>> + struct c67x00_urb_priv,
>>> + hep_node)->urb;
>>> + add(c67x00, urb);
>>> + }
>>> + }
>>> +}
>>> +
>>> +static void c67x00_fill_frame(struct c67x00_hcd *c67x00)
>>> +{
>>> + struct c67x00_td *td, *ttd;
>>> +
>>> + /* Check if we can proceed */
>>> + if (!list_empty(&c67x00->td_list)) {
>>> + dev_warn(c67x00_hcd_dev(c67x00),
>>> + "TD list not empty! This should not happen!\n");
>>> + list_for_each_entry_safe(td, ttd, &c67x00->td_list, td_list) {
>>> + dbg_td(c67x00, td, "Unprocessed td");
>>> + c67x00_release_td(td);
>>> + }
>>> + }
>>> +
>>> + /* Reinitialize variables */
>>> + c67x00->bandwidth_allocated = 0;
>>> + c67x00->periodic_bw_allocated = 0;
>>> +
>>> + c67x00->next_td_addr = c67x00->td_base_addr;
>>> + c67x00->next_buf_addr = c67x00->buf_base_addr;
>>> +
>>> + /* Fill the list */
>>> + c67x00_fill_from_list(c67x00, PIPE_ISOCHRONOUS, c67x00_add_iso_urb);
>>> + c67x00_fill_from_list(c67x00, PIPE_INTERRUPT, c67x00_add_int_urb);
>>> + c67x00_fill_from_list(c67x00, PIPE_CONTROL, c67x00_add_ctrl_urb);
>>> + c67x00_fill_from_list(c67x00, PIPE_BULK, c67x00_add_data_urb);
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/**
>>> + * Get TD from C67X00
>>> + */
>>> +static inline void
>>> +c67x00_parse_td(struct c67x00_hcd *c67x00, struct c67x00_td *td)
>>> +{
>>> + c67x00_ll_read_mem_le16(c67x00->sie->dev,
>>> + td->td_addr, td, CY_TD_SIZE);
>>> +
>>> + if (usb_pipein(td->pipe) && td_actual_bytes(td))
>>> + c67x00_ll_read_mem_le16(c67x00->sie->dev, td_ly_base_addr(td),
>>> + td->data, td_actual_bytes(td));
>>> +}
>>> +
>>> +static int c67x00_td_to_error(struct c67x00_hcd *c67x00, struct c67x00_td *td)
>>> +{
>>> + if (td->status & TD_STATUSMASK_ERR) {
>>> + dbg_td(c67x00, td, "ERROR_FLAG");
>>> + return -EILSEQ;
>>> + }
>>> + if (td->status & TD_STATUSMASK_STALL) {
>>> + /* dbg_td(c67x00, td, "STALL"); */
>>> + return -EPIPE;
>>> + }
>>> + if (td->status & TD_STATUSMASK_TMOUT) {
>>> + dbg_td(c67x00, td, "TIMEOUT");
>>> + return -ETIMEDOUT;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static inline int c67x00_end_of_data(struct c67x00_td *td)
>>> +{
>>> + int maxps, need_empty, remaining;
>>> + struct urb *urb = td->urb;
>>> + int act_bytes;
>>> +
>>> + act_bytes = td_actual_bytes(td);
>>> +
>>> + if (unlikely(!act_bytes))
>>> + return 1; /* This was an empty packet */
>>> +
>>> + maxps = usb_maxpacket(td_udev(td), td->pipe, usb_pipeout(td->pipe));
>>> +
>>> + if (unlikely(act_bytes < maxps))
>>> + return 1; /* Smaller then full packet */
>>> +
>>> + remaining = urb->transfer_buffer_length - urb->actual_length;
>>> + need_empty = (urb->transfer_flags & URB_ZERO_PACKET) &&
>>> + usb_pipeout(urb->pipe) && !(remaining % maxps);
>>> +
>>> + if (unlikely(!remaining && !need_empty))
>>> + return 1;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/* Remove all td's from the list which come
>>> + * after last_td and are meant for the same pipe.
>>> + * This is used when a short packet has occured */
>>> +static inline void c67x00_clear_pipe(struct c67x00_hcd *c67x00,
>>> + struct c67x00_td *last_td)
>>> +{
>>> + struct c67x00_td *td, *tmp;
>>> + td = last_td;
>>> + tmp = last_td;
>>> + while (td->td_list.next != &c67x00->td_list) {
>>> + td = list_entry(td->td_list.next, struct c67x00_td, td_list);
>>> + if (td->pipe == last_td->pipe) {
>>> + c67x00_release_td(td);
>>> + td = tmp;
>>> + }
>>> + tmp = td;
>>> + }
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +static void c67x00_handle_successful_td(struct c67x00_hcd *c67x00,
>>> + struct c67x00_td *td)
>>> +{
>>> + struct urb *urb = td->urb;
>>> +
>>> + if (!urb)
>>> + return;
>>> +
>>> + urb->actual_length += td_actual_bytes(td);
>>> +
>>> + switch (usb_pipetype(td->pipe)) {
>>> + /* isochronous tds are handled separately */
>>> + case PIPE_CONTROL:
>>> + switch (td->privdata) {
>>> + case SETUP_STAGE:
>>> + urb->interval =
>>> + urb->transfer_buffer_length ?
>>> + DATA_STAGE : STATUS_STAGE;
>>> + /* Don't count setup_packet with normal data: */
>>> + urb->actual_length = 0;
>>> + break;
>>> +
>>> + case DATA_STAGE:
>>> + if (c67x00_end_of_data(td)) {
>>> + urb->interval = STATUS_STAGE;
>>> + c67x00_clear_pipe(c67x00, td);
>>> + }
>>> + break;
>>> +
>>> + case STATUS_STAGE:
>>> + urb->interval = 0;
>>> + c67x00_giveback_urb(c67x00, urb, 0);
>>> + break;
>>> + }
>>> + break;
>>> +
>>> + case PIPE_INTERRUPT:
>>> + case PIPE_BULK:
>>> + if (unlikely(c67x00_end_of_data(td))) {
>>> + c67x00_clear_pipe(c67x00, td);
>>> + c67x00_giveback_urb(c67x00, urb, 0);
>>> + }
>>> + break;
>>> + }
>>> +}
>>> +
>>> +static void c67x00_handle_isoc(struct c67x00_hcd *c67x00, struct c67x00_td *td)
>>> +{
>>> + struct urb *urb = td->urb;
>>> + struct c67x00_urb_priv *urbp;
>>> + int cnt;
>>> +
>>> + if (!urb)
>>> + return;
>>> +
>>> + urbp = urb->hcpriv;
>>> + cnt = td->privdata;
>>> +
>>> + if (td->status & TD_ERROR_MASK)
>>> + urb->error_count++;
>>> +
>>> + urb->iso_frame_desc[cnt].actual_length = td_actual_bytes(td);
>>> + urb->iso_frame_desc[cnt].status = c67x00_td_to_error(c67x00, td);
>>> + if (cnt + 1 == urb->number_of_packets) /* Last packet */
>>> + c67x00_giveback_urb(c67x00, urb, 0);
>>> +}
>>> +
>>> +/* -------------------------------------------------------------------------- */
>>> +
>>> +/**
>>> + * c67x00_check_td_list - handle tds which have been processed by the c67x00
>>> + * pre: current_td == 0
>>> + */
>>> +static inline void c67x00_check_td_list(struct c67x00_hcd *c67x00)
>>> +{
>>> + struct c67x00_td *td, *tmp;
>>> + struct urb *urb;
>>> + int ack_ok;
>>> + int clear_endpoint;
>>> +
>>> + list_for_each_entry_safe(td, tmp, &c67x00->td_list, td_list) {
>>> + /* get the TD */
>>> + c67x00_parse_td(c67x00, td);
>>> + urb = td->urb; /* urb can be NULL! */
>>> + ack_ok = 0;
>>> + clear_endpoint = 1;
>>> +
>>> + /* Handle isochronous transfers separately */
>>> + if (usb_pipeisoc(td->pipe)) {
>>> + clear_endpoint = 0;
>>> + c67x00_handle_isoc(c67x00, td);
>>> + goto cont;
>>> + }
>>> +
>>> + /* When an error occurs, all td's for that pipe go into an
>>> + * inactive state. This state matches successful transfers so
>>> + * we must make sure not to service them. */
>>> + if (td->status & TD_ERROR_MASK) {
>>> + c67x00_giveback_urb(c67x00, urb,
>>> + c67x00_td_to_error(c67x00, td));
>>> + goto cont;
>>> + }
>>> +
>>> + if ((td->status & TD_STATUSMASK_NAK) || !td_sequence_ok(td) ||
>>> + !td_acked(td))
>>> + goto cont;
>>> +
>>> + /* Sequence ok and acked, don't need to fix toggle */
>>> + ack_ok = 1;
>>> +
>>> + if (unlikely(td->status & TD_STATUSMASK_OVF)) {
>>> + if (td_residue(td) & TD_RESIDUE_OVERFLOW) {
>>> + /* Overflow */
>>> + c67x00_giveback_urb(c67x00, urb, -EOVERFLOW);
>>> + goto cont;
>>> + }
>>> + }
>>> +
>>> + clear_endpoint = 0;
>>> +// dbg_td(c67x00, td, "SUCCESSFUL");
>>> + c67x00_ha
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