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Re: [microblaze-uclinux] USB : Problem in porting C67x00 Driver to petalinux
Childhood Hwang wrote:
> Mount file system works, it's because of NLS.
Anyway,
have anyone tried to used mainline kernel with c67x00 driver?
Thanks for info,
Michal
>
> 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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> Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
>
>
--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663
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