2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 05:04:00 +08:00
linux-next/drivers/usb/renesas_usbhs/mod_host.c
Greg Kroah-Hartman 7fd94beeca usb: gadget: patches for v3.8
renesas_usbhs implements ->pullup() method, switches over
 to devm_request_irq(), adds support for DMA Engine and
 got a few miscelaneous cleanups.
 
 The NCM gadget got an endianness fix and the Ethernet
 gadget a frame size fix.
 
 We're finally removing the g_file_storage gadget and
 sticking to g_mass_storage and the new tcm_usb_gadget
 gadgets since that was a huge duplicaton of effort anyway.
 
 While removing g_file_storage, we also had to fix a bunch
 of defconfigs which were still pointing to the old gadget.
 
 There's a big series getting us closer to being able to
 introduce our configfs interface. The series converts
 functions into loadable modules which will, eventually,
 be registered to the configfs interface.
 
 Other than that there's the usual typo fixes and miscelaneous
 cleanups all over the place.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJQnXPMAAoJEIaOsuA1yqREkygQALIuhY6veRPZoZJltuADeAOV
 h7lBkuseJxvlJsbMLnjqP5tw4W/haE1deGR+ee1ZItkPrERCX1++jkQ6hmm7e00R
 mvr8rI+n3eBHSKUO89tUfCaz5UBsTl0cowPWdTwxRrV4VRJ1wVBw/oII9sfyss03
 jDo+11DSjTGTB+Bz72p2NTkRiv9my2Kz+ihhqFR5VSl5FyoutG53RNKRmciJKGB+
 i+RptOI+prdW1uOURHbie5FAI0xOBrE1Up2XdNiZ9blT6zcsK754Lc8erFJEZXX5
 7s8Ys/HJZLQCF/fRt4WAw8e1lSPELD2xuDMqV+WKu93aXOiAWL1SbzqK3Y+PaUDg
 Red07jOxgPqgq0F1mAp3+0Rs1RnshSvKREtQhZqsttg7suXhDB0q7h61CX8uQbRA
 hBZh8eFexRjqOZxveeV+h4ATz00c2nlEa8cJscr5zLf4R/LSxJWT7LV5227BDkBV
 9NUMA3dunDYZLqnxBv5lS2gQzmYO6G11wzdpgjnABL2WlM8Pv1lUDhY+erwvTRzd
 BM+9qMd7K40BuI1JyUsbBdmuEpJAD/yWE77pT2aBrr4767x0CYjBPZqQAxXFcWi8
 5NG1BzqWmH9HhwxKyWueWgNgY253cRcAzFlUN80NRA2UuNkMAeOAeJjvK48isAqJ
 T1MUkQgIFNvSecpRPrEl
 =umtl
 -----END PGP SIGNATURE-----

Merge tag 'gadget-for-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

USB gadget patches from Felipe:
"usb: gadget: patches for v3.8

renesas_usbhs implements ->pullup() method, switches over
to devm_request_irq(), adds support for DMA Engine and
got a few miscelaneous cleanups.

The NCM gadget got an endianness fix and the Ethernet
gadget a frame size fix.

We're finally removing the g_file_storage gadget and
sticking to g_mass_storage and the new tcm_usb_gadget
gadgets since that was a huge duplicaton of effort anyway.

While removing g_file_storage, we also had to fix a bunch
of defconfigs which were still pointing to the old gadget.

There's a big series getting us closer to being able to
introduce our configfs interface. The series converts
functions into loadable modules which will, eventually,
be registered to the configfs interface.

Other than that there's the usual typo fixes and miscelaneous
cleanups all over the place."
2012-11-11 17:31:53 -08:00

1585 lines
37 KiB
C

/*
* Renesas USB driver
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <linux/io.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "common.h"
/*
*** HARDWARE LIMITATION ***
*
* 1) renesas_usbhs has a limited number of controllable devices.
* it can control only 9 devices in generally.
* see DEVADDn / DCPMAXP / PIPEMAXP.
*
* 2) renesas_usbhs pipe number is limited.
* the pipe will be re-used for each devices.
* so, software should control DATA0/1 sequence of each devices.
*/
/*
* image of mod_host
*
* +--------+
* | udev 0 | --> it is used when set address
* +--------+
*
* +--------+ pipes are reused for each uep.
* | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when
* +--------+ | | other device requested
* +- [uep 1 (bulk)] --|---+ +--------------+
* | +--------------> | pipe0 (dcp) |
* +- [uep 2 (bulk)] -@ | +--------------+
* | | pipe1 (isoc) |
* +--------+ | +--------------+
* | udev 2 |-+- [uep 0 (dcp) ] -@ +----------> | pipe2 (bulk) |
* +--------+ | +--------------+
* +- [uep 1 (int) ] ----+ +------> | pipe3 (bulk) |
* | | +--------------+
* +--------+ +-----|------> | pipe4 (int) |
* | udev 3 |-+- [uep 0 (dcp) ] -@ | +--------------+
* +--------+ | | | .... |
* +- [uep 1 (bulk)] -@ | | .... |
* | |
* +- [uep 2 (bulk)]-----------+
*
* @ : uep requested free pipe, but all have been used.
* now it is waiting for free pipe
*/
/*
* struct
*/
struct usbhsh_request {
struct urb *urb;
struct usbhs_pkt pkt;
};
struct usbhsh_device {
struct usb_device *usbv;
struct list_head ep_list_head; /* list of usbhsh_ep */
};
struct usbhsh_ep {
struct usbhs_pipe *pipe; /* attached pipe */
struct usbhsh_device *udev; /* attached udev */
struct usb_host_endpoint *ep;
struct list_head ep_list; /* list to usbhsh_device */
unsigned int counter; /* pipe attach counter */
};
#define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
#define USBHSH_PORT_MAX 7 /* see DEVADDn :: HUBPORT */
struct usbhsh_hpriv {
struct usbhs_mod mod;
struct usbhs_pipe *dcp;
struct usbhsh_device udev[USBHSH_DEVICE_MAX];
u32 port_stat; /* USB_PORT_STAT_xxx */
struct completion setup_ack_done;
};
static const char usbhsh_hcd_name[] = "renesas_usbhs host";
/*
* macro
*/
#define usbhsh_priv_to_hpriv(priv) \
container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
#define __usbhsh_for_each_udev(start, pos, h, i) \
for (i = start, pos = (h)->udev + i; \
i < USBHSH_DEVICE_MAX; \
i++, pos = (h)->udev + i)
#define usbhsh_for_each_udev(pos, hpriv, i) \
__usbhsh_for_each_udev(1, pos, hpriv, i)
#define usbhsh_for_each_udev_with_dev0(pos, hpriv, i) \
__usbhsh_for_each_udev(0, pos, hpriv, i)
#define usbhsh_hcd_to_hpriv(h) (struct usbhsh_hpriv *)((h)->hcd_priv)
#define usbhsh_hcd_to_dev(h) ((h)->self.controller)
#define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
#define usbhsh_hpriv_to_dcp(h) ((h)->dcp)
#define usbhsh_hpriv_to_hcd(h) \
container_of((void *)h, struct usb_hcd, hcd_priv)
#define usbhsh_ep_to_uep(u) ((u)->hcpriv)
#define usbhsh_uep_to_pipe(u) ((u)->pipe)
#define usbhsh_uep_to_udev(u) ((u)->udev)
#define usbhsh_uep_to_ep(u) ((u)->ep)
#define usbhsh_urb_to_ureq(u) ((u)->hcpriv)
#define usbhsh_urb_to_usbv(u) ((u)->dev)
#define usbhsh_usbv_to_udev(d) dev_get_drvdata(&(d)->dev)
#define usbhsh_udev_to_usbv(h) ((h)->usbv)
#define usbhsh_udev_is_used(h) usbhsh_udev_to_usbv(h)
#define usbhsh_pipe_to_uep(p) ((p)->mod_private)
#define usbhsh_device_parent(d) (usbhsh_usbv_to_udev((d)->usbv->parent))
#define usbhsh_device_hubport(d) ((d)->usbv->portnum)
#define usbhsh_device_number(h, d) ((int)((d) - (h)->udev))
#define usbhsh_device_nth(h, d) ((h)->udev + d)
#define usbhsh_device0(h) usbhsh_device_nth(h, 0)
#define usbhsh_port_stat_init(h) ((h)->port_stat = 0)
#define usbhsh_port_stat_set(h, s) ((h)->port_stat |= (s))
#define usbhsh_port_stat_clear(h, s) ((h)->port_stat &= ~(s))
#define usbhsh_port_stat_get(h) ((h)->port_stat)
#define usbhsh_pkt_to_ureq(p) \
container_of((void *)p, struct usbhsh_request, pkt)
/*
* req alloc/free
*/
static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
struct urb *urb,
gfp_t mem_flags)
{
struct usbhsh_request *ureq;
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhs_priv_to_dev(priv);
ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
if (!ureq) {
dev_err(dev, "ureq alloc fail\n");
return NULL;
}
usbhs_pkt_init(&ureq->pkt);
ureq->urb = urb;
usbhsh_urb_to_ureq(urb) = ureq;
return ureq;
}
static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
struct usbhsh_request *ureq)
{
usbhsh_urb_to_ureq(ureq->urb) = NULL;
ureq->urb = NULL;
kfree(ureq);
}
/*
* status
*/
static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
{
/*
* we can decide some device is attached or not
* by checking mod.irq_attch
* see
* usbhsh_irq_attch()
* usbhsh_irq_dtch()
*/
return (hpriv->mod.irq_attch == NULL);
}
/*
* pipe control
*/
static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
struct urb *urb,
struct usbhs_pkt *pkt)
{
int len = urb->actual_length;
int maxp = usb_endpoint_maxp(&urb->ep->desc);
int t = 0;
/* DCP is out of sequence control */
if (usb_pipecontrol(urb->pipe))
return;
/*
* renesas_usbhs pipe has a limitation in a number.
* So, driver should re-use the limited pipe for each device/endpoint.
* DATA0/1 sequence should be saved for it.
* see [image of mod_host]
* [HARDWARE LIMITATION]
*/
/*
* next sequence depends on actual_length
*
* ex) actual_length = 1147, maxp = 512
* data0 : 512
* data1 : 512
* data0 : 123
* data1 is the next sequence
*/
t = len / maxp;
if (len % maxp)
t++;
if (pkt->zero)
t++;
t %= 2;
if (t)
usb_dotoggle(urb->dev,
usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe));
}
static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
struct urb *urb);
static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
struct urb *urb)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
struct usbhs_pipe *pipe;
struct usb_endpoint_descriptor *desc = &urb->ep->desc;
struct device *dev = usbhs_priv_to_dev(priv);
unsigned long flags;
int dir_in_req = !!usb_pipein(urb->pipe);
int is_dcp = usb_endpoint_xfer_control(desc);
int i, dir_in;
int ret = -EBUSY;
/******************** spin lock ********************/
usbhs_lock(priv, flags);
/*
* if uep has been attached to pipe,
* reuse it
*/
if (usbhsh_uep_to_pipe(uep)) {
ret = 0;
goto usbhsh_pipe_attach_done;
}
usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
/* check pipe type */
if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
continue;
/* check pipe direction if normal pipe */
if (!is_dcp) {
dir_in = !!usbhs_pipe_is_dir_in(pipe);
if (0 != (dir_in - dir_in_req))
continue;
}
/* check pipe is free */
if (usbhsh_pipe_to_uep(pipe))
continue;
/*
* attach pipe to uep
*
* usbhs_pipe_config_update() should be called after
* usbhs_set_device_config()
* see
* DCPMAXP/PIPEMAXP
*/
usbhsh_uep_to_pipe(uep) = pipe;
usbhsh_pipe_to_uep(pipe) = uep;
usbhs_pipe_config_update(pipe,
usbhsh_device_number(hpriv, udev),
usb_endpoint_num(desc),
usb_endpoint_maxp(desc));
dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
usbhsh_device_number(hpriv, udev),
usb_endpoint_num(desc),
usbhs_pipe_name(pipe),
dir_in_req ? "in" : "out");
ret = 0;
break;
}
usbhsh_pipe_attach_done:
if (0 == ret)
uep->counter++;
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
return ret;
}
static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
struct usbhsh_ep *uep)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct usbhs_pipe *pipe;
struct device *dev = usbhs_priv_to_dev(priv);
unsigned long flags;
if (unlikely(!uep)) {
dev_err(dev, "no uep\n");
return;
}
/******************** spin lock ********************/
usbhs_lock(priv, flags);
pipe = usbhsh_uep_to_pipe(uep);
if (unlikely(!pipe)) {
dev_err(dev, "uep doens't have pipe\n");
} else if (1 == uep->counter--) { /* last user */
struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
/* detach pipe from uep */
usbhsh_uep_to_pipe(uep) = NULL;
usbhsh_pipe_to_uep(pipe) = NULL;
dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
usbhsh_device_number(hpriv, udev),
usb_endpoint_num(&ep->desc),
usbhs_pipe_name(pipe));
}
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
}
/*
* endpoint control
*/
static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
struct urb *urb,
gfp_t mem_flags)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
struct usb_host_endpoint *ep = urb->ep;
struct usbhsh_ep *uep;
struct device *dev = usbhs_priv_to_dev(priv);
struct usb_endpoint_descriptor *desc = &ep->desc;
unsigned long flags;
uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
if (!uep) {
dev_err(dev, "usbhsh_ep alloc fail\n");
return -ENOMEM;
}
/******************** spin lock ********************/
usbhs_lock(priv, flags);
/*
* init endpoint
*/
uep->counter = 0;
INIT_LIST_HEAD(&uep->ep_list);
list_add_tail(&uep->ep_list, &udev->ep_list_head);
usbhsh_uep_to_udev(uep) = udev;
usbhsh_uep_to_ep(uep) = ep;
usbhsh_ep_to_uep(ep) = uep;
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
dev_dbg(dev, "%s [%d-%d]\n", __func__,
usbhsh_device_number(hpriv, udev),
usb_endpoint_num(desc));
return 0;
}
static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
struct usb_host_endpoint *ep)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhs_priv_to_dev(priv);
struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
unsigned long flags;
if (!uep)
return;
dev_dbg(dev, "%s [%d-%d]\n", __func__,
usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
usb_endpoint_num(&ep->desc));
if (usbhsh_uep_to_pipe(uep))
usbhsh_pipe_detach(hpriv, uep);
/******************** spin lock ********************/
usbhs_lock(priv, flags);
/* remove this endpoint from udev */
list_del_init(&uep->ep_list);
usbhsh_uep_to_udev(uep) = NULL;
usbhsh_uep_to_ep(uep) = NULL;
usbhsh_ep_to_uep(ep) = NULL;
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
kfree(uep);
}
static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
struct usbhsh_device *udev)
{
struct usbhsh_ep *uep, *next;
list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
}
/*
* device control
*/
static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
struct usbhsh_device *udev)
{
struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
return hcd->self.root_hub == usbv->parent;
}
static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
{
return !list_empty(&udev->ep_list_head);
}
static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
struct urb *urb)
{
struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
/* usbhsh_device_attach() is still not called */
if (!udev)
return NULL;
/* if it is device0, return it */
if (0 == usb_pipedevice(urb->pipe))
return usbhsh_device0(hpriv);
/* return attached device */
return udev;
}
static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
struct urb *urb)
{
struct usbhsh_device *udev = NULL;
struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
struct usbhsh_device *pos;
struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
struct device *dev = usbhsh_hcd_to_dev(hcd);
struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
unsigned long flags;
u16 upphub, hubport;
int i;
/*
* This function should be called only while urb is pointing to device0.
* It will attach unused usbhsh_device to urb (usbv),
* and initialize device0.
* You can use usbhsh_device_get() to get "current" udev,
* and usbhsh_usbv_to_udev() is for "attached" udev.
*/
if (0 != usb_pipedevice(urb->pipe)) {
dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
return NULL;
}
/******************** spin lock ********************/
usbhs_lock(priv, flags);
/*
* find unused device
*/
usbhsh_for_each_udev(pos, hpriv, i) {
if (usbhsh_udev_is_used(pos))
continue;
udev = pos;
break;
}
if (udev) {
/*
* usbhsh_usbv_to_udev()
* usbhsh_udev_to_usbv()
* will be enable
*/
dev_set_drvdata(&usbv->dev, udev);
udev->usbv = usbv;
}
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
if (!udev) {
dev_err(dev, "no free usbhsh_device\n");
return NULL;
}
if (usbhsh_device_has_endpoint(udev)) {
dev_warn(dev, "udev have old endpoint\n");
usbhsh_endpoint_detach_all(hpriv, udev);
}
if (usbhsh_device_has_endpoint(udev0)) {
dev_warn(dev, "udev0 have old endpoint\n");
usbhsh_endpoint_detach_all(hpriv, udev0);
}
/* uep will be attached */
INIT_LIST_HEAD(&udev0->ep_list_head);
INIT_LIST_HEAD(&udev->ep_list_head);
/*
* set device0 config
*/
usbhs_set_device_config(priv,
0, 0, 0, usbv->speed);
/*
* set new device config
*/
upphub = 0;
hubport = 0;
if (!usbhsh_connected_to_rhdev(hcd, udev)) {
/* if udev is not connected to rhdev, it means parent is Hub */
struct usbhsh_device *parent = usbhsh_device_parent(udev);
upphub = usbhsh_device_number(hpriv, parent);
hubport = usbhsh_device_hubport(udev);
dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
upphub, hubport, parent);
}
usbhs_set_device_config(priv,
usbhsh_device_number(hpriv, udev),
upphub, hubport, usbv->speed);
dev_dbg(dev, "%s [%d](%p)\n", __func__,
usbhsh_device_number(hpriv, udev), udev);
return udev;
}
static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
struct usbhsh_device *udev)
{
struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhsh_hcd_to_dev(hcd);
struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
unsigned long flags;
dev_dbg(dev, "%s [%d](%p)\n", __func__,
usbhsh_device_number(hpriv, udev), udev);
if (usbhsh_device_has_endpoint(udev)) {
dev_warn(dev, "udev still have endpoint\n");
usbhsh_endpoint_detach_all(hpriv, udev);
}
/*
* There is nothing to do if it is device0.
* see
* usbhsh_device_attach()
* usbhsh_device_get()
*/
if (0 == usbhsh_device_number(hpriv, udev))
return;
/******************** spin lock ********************/
usbhs_lock(priv, flags);
/*
* usbhsh_usbv_to_udev()
* usbhsh_udev_to_usbv()
* will be disable
*/
dev_set_drvdata(&usbv->dev, NULL);
udev->usbv = NULL;
usbhs_unlock(priv, flags);
/******************** spin unlock ******************/
}
/*
* queue push/pop
*/
static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
{
struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
struct urb *urb = ureq->urb;
struct device *dev = usbhs_priv_to_dev(priv);
int status = 0;
dev_dbg(dev, "%s\n", __func__);
if (!urb) {
dev_warn(dev, "pkt doesn't have urb\n");
return;
}
if (!usbhsh_is_running(hpriv))
status = -ESHUTDOWN;
urb->actual_length = pkt->actual;
usbhsh_ureq_free(hpriv, ureq);
usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
usb_hcd_unlink_urb_from_ep(hcd, urb);
usb_hcd_giveback_urb(hcd, urb, status);
}
static int usbhsh_queue_push(struct usb_hcd *hcd,
struct urb *urb,
gfp_t mem_flags)
{
struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
struct device *dev = usbhsh_hcd_to_dev(hcd);
struct usbhsh_request *ureq;
void *buf;
int len, sequence;
if (usb_pipeisoc(urb->pipe)) {
dev_err(dev, "pipe iso is not supported now\n");
return -EIO;
}
/* this ureq will be freed on usbhsh_queue_done() */
ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
if (unlikely(!ureq)) {
dev_err(dev, "ureq alloc fail\n");
return -ENOMEM;
}
if (usb_pipein(urb->pipe))
pipe->handler = &usbhs_fifo_dma_pop_handler;
else
pipe->handler = &usbhs_fifo_dma_push_handler;
buf = (void *)(urb->transfer_buffer + urb->actual_length);
len = urb->transfer_buffer_length - urb->actual_length;
sequence = usb_gettoggle(urb->dev,
usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe));
dev_dbg(dev, "%s\n", __func__);
usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
sequence);
usbhs_pkt_start(pipe);
return 0;
}
static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
struct usbhs_pipe *pipe)
{
struct usbhs_pkt *pkt;
while (1) {
pkt = usbhs_pkt_pop(pipe, NULL);
if (!pkt)
break;
/*
* if all packet are gone, usbhsh_endpoint_disable()
* will be called.
* then, attached device/endpoint/pipe will be detached
*/
usbhsh_queue_done(priv, pkt);
}
}
static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
{
struct usbhs_pipe *pos;
int i;
usbhs_for_each_pipe_with_dcp(pos, priv, i)
usbhsh_queue_force_pop(priv, pos);
}
/*
* DCP setup stage
*/
static int usbhsh_is_request_address(struct urb *urb)
{
struct usb_ctrlrequest *req;
req = (struct usb_ctrlrequest *)urb->setup_packet;
if ((DeviceOutRequest == req->bRequestType << 8) &&
(USB_REQ_SET_ADDRESS == req->bRequest))
return 1;
else
return 0;
}
static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
struct urb *urb,
struct usbhs_pipe *pipe)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct usb_ctrlrequest req;
struct device *dev = usbhs_priv_to_dev(priv);
/*
* wait setup packet ACK
* see
* usbhsh_irq_setup_ack()
* usbhsh_irq_setup_err()
*/
init_completion(&hpriv->setup_ack_done);
/* copy original request */
memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
/*
* renesas_usbhs can not use original usb address.
* see HARDWARE LIMITATION.
* modify usb address here to use attached device.
* see usbhsh_device_attach()
*/
if (usbhsh_is_request_address(urb)) {
struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
/* udev is a attached device */
req.wValue = usbhsh_device_number(hpriv, udev);
dev_dbg(dev, "create new address - %d\n", req.wValue);
}
/* set request */
usbhs_usbreq_set_val(priv, &req);
/*
* wait setup packet ACK
*/
wait_for_completion(&hpriv->setup_ack_done);
dev_dbg(dev, "%s done\n", __func__);
}
/*
* DCP data stage
*/
static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
struct usbhs_pkt *pkt)
{
struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
/* this ureq was connected to urb when usbhsh_urb_enqueue() */
usbhsh_ureq_free(hpriv, ureq);
}
static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
struct urb *urb,
struct usbhs_pipe *pipe,
gfp_t mem_flags)
{
struct usbhsh_request *ureq;
/* this ureq will be freed on usbhsh_data_stage_packet_done() */
ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
if (unlikely(!ureq))
return -ENOMEM;
if (usb_pipein(urb->pipe))
pipe->handler = &usbhs_dcp_data_stage_in_handler;
else
pipe->handler = &usbhs_dcp_data_stage_out_handler;
usbhs_pkt_push(pipe, &ureq->pkt,
usbhsh_data_stage_packet_done,
urb->transfer_buffer,
urb->transfer_buffer_length,
(urb->transfer_flags & URB_ZERO_PACKET),
-1);
return 0;
}
/*
* DCP status stage
*/
static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
struct urb *urb,
struct usbhs_pipe *pipe,
gfp_t mem_flags)
{
struct usbhsh_request *ureq;
/* This ureq will be freed on usbhsh_queue_done() */
ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
if (unlikely(!ureq))
return -ENOMEM;
if (usb_pipein(urb->pipe))
pipe->handler = &usbhs_dcp_status_stage_in_handler;
else
pipe->handler = &usbhs_dcp_status_stage_out_handler;
usbhs_pkt_push(pipe, &ureq->pkt,
usbhsh_queue_done,
NULL,
urb->transfer_buffer_length,
0, -1);
return 0;
}
static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
struct urb *urb,
gfp_t mflags)
{
struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
struct device *dev = usbhsh_hcd_to_dev(hcd);
int ret;
dev_dbg(dev, "%s\n", __func__);
/*
* setup stage
*
* usbhsh_send_setup_stage_packet() wait SACK/SIGN
*/
usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
/*
* data stage
*
* It is pushed only when urb has buffer.
*/
if (urb->transfer_buffer_length) {
ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
if (ret < 0) {
dev_err(dev, "data stage failed\n");
return ret;
}
}
/*
* status stage
*/
ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
if (ret < 0) {
dev_err(dev, "status stage failed\n");
return ret;
}
/*
* start pushed packets
*/
usbhs_pkt_start(pipe);
return 0;
}
/*
* dma map functions
*/
static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
{
if (map) {
struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
struct urb *urb = ureq->urb;
/* it can not use scatter/gather */
if (urb->num_sgs)
return -EINVAL;
pkt->dma = urb->transfer_dma;
if (!pkt->dma)
return -EINVAL;
}
return 0;
}
/*
* for hc_driver
*/
static int usbhsh_host_start(struct usb_hcd *hcd)
{
return 0;
}
static void usbhsh_host_stop(struct usb_hcd *hcd)
{
}
static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
struct urb *urb,
gfp_t mem_flags)
{
struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhs_priv_to_dev(priv);
struct usb_host_endpoint *ep = urb->ep;
struct usbhsh_device *new_udev = NULL;
int is_dir_in = usb_pipein(urb->pipe);
int ret;
dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
if (!usbhsh_is_running(hpriv)) {
ret = -EIO;
dev_err(dev, "host is not running\n");
goto usbhsh_urb_enqueue_error_not_linked;
}
ret = usb_hcd_link_urb_to_ep(hcd, urb);
if (ret) {
dev_err(dev, "urb link failed\n");
goto usbhsh_urb_enqueue_error_not_linked;
}
/*
* attach udev if needed
* see [image of mod_host]
*/
if (!usbhsh_device_get(hpriv, urb)) {
new_udev = usbhsh_device_attach(hpriv, urb);
if (!new_udev) {
ret = -EIO;
dev_err(dev, "device attach failed\n");
goto usbhsh_urb_enqueue_error_not_linked;
}
}
/*
* attach endpoint if needed
* see [image of mod_host]
*/
if (!usbhsh_ep_to_uep(ep)) {
ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
if (ret < 0) {
dev_err(dev, "endpoint attach failed\n");
goto usbhsh_urb_enqueue_error_free_device;
}
}
/*
* attach pipe to endpoint
* see [image of mod_host]
*/
ret = usbhsh_pipe_attach(hpriv, urb);
if (ret < 0) {
dev_err(dev, "pipe attach failed\n");
goto usbhsh_urb_enqueue_error_free_endpoint;
}
/*
* push packet
*/
if (usb_pipecontrol(urb->pipe))
ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
else
ret = usbhsh_queue_push(hcd, urb, mem_flags);
return ret;
usbhsh_urb_enqueue_error_free_endpoint:
usbhsh_endpoint_detach(hpriv, ep);
usbhsh_urb_enqueue_error_free_device:
if (new_udev)
usbhsh_device_detach(hpriv, new_udev);
usbhsh_urb_enqueue_error_not_linked:
dev_dbg(dev, "%s error\n", __func__);
return ret;
}
static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
{
struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
if (ureq) {
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct usbhs_pkt *pkt = &ureq->pkt;
usbhs_pkt_pop(pkt->pipe, pkt);
usbhsh_queue_done(priv, pkt);
}
return 0;
}
static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *ep)
{
struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
struct usbhsh_device *udev;
struct usbhsh_hpriv *hpriv;
/*
* this function might be called manytimes by same hcd/ep
* in-endpoint == out-endpoint if ep == dcp.
*/
if (!uep)
return;
udev = usbhsh_uep_to_udev(uep);
hpriv = usbhsh_hcd_to_hpriv(hcd);
usbhsh_endpoint_detach(hpriv, ep);
/*
* if there is no endpoint,
* free device
*/
if (!usbhsh_device_has_endpoint(udev))
usbhsh_device_detach(hpriv, udev);
}
static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
int roothub_id = 1; /* only 1 root hub */
/*
* does port stat was changed ?
* check USB_PORT_STAT_C_xxx << 16
*/
if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
*buf = (1 << roothub_id);
else
*buf = 0;
return !!(*buf);
}
static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhs_priv_to_dev(priv);
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
return 0;
}
return -EPIPE;
}
static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhs_priv_to_dev(priv);
int enable = (typeReq == SetPortFeature);
int speed, i, timeout = 128;
int roothub_id = 1; /* only 1 root hub */
/* common error */
if (wIndex > roothub_id || wLength != 0)
return -EPIPE;
/* check wValue */
switch (wValue) {
case USB_PORT_FEAT_POWER:
usbhs_vbus_ctrl(priv, enable);
dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
break;
case USB_PORT_FEAT_ENABLE:
case USB_PORT_FEAT_SUSPEND:
case USB_PORT_FEAT_C_ENABLE:
case USB_PORT_FEAT_C_SUSPEND:
case USB_PORT_FEAT_C_CONNECTION:
case USB_PORT_FEAT_C_OVER_CURRENT:
case USB_PORT_FEAT_C_RESET:
dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
break;
case USB_PORT_FEAT_RESET:
if (!enable)
break;
usbhsh_port_stat_clear(hpriv,
USB_PORT_STAT_HIGH_SPEED |
USB_PORT_STAT_LOW_SPEED);
usbhsh_queue_force_pop_all(priv);
usbhs_bus_send_reset(priv);
msleep(20);
usbhs_bus_send_sof_enable(priv);
for (i = 0; i < timeout ; i++) {
switch (usbhs_bus_get_speed(priv)) {
case USB_SPEED_LOW:
speed = USB_PORT_STAT_LOW_SPEED;
goto got_usb_bus_speed;
case USB_SPEED_HIGH:
speed = USB_PORT_STAT_HIGH_SPEED;
goto got_usb_bus_speed;
case USB_SPEED_FULL:
speed = 0;
goto got_usb_bus_speed;
}
msleep(20);
}
return -EPIPE;
got_usb_bus_speed:
usbhsh_port_stat_set(hpriv, speed);
usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
__func__, speed);
/* status change is not needed */
return 0;
default:
return -EPIPE;
}
/* set/clear status */
if (enable)
usbhsh_port_stat_set(hpriv, (1 << wValue));
else
usbhsh_port_stat_clear(hpriv, (1 << wValue));
return 0;
}
static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
struct device *dev = usbhs_priv_to_dev(priv);
int roothub_id = 1; /* only 1 root hub */
switch (typeReq) {
case GetHubStatus:
dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
*buf = 0x00;
break;
case GetPortStatus:
if (wIndex != roothub_id)
return -EPIPE;
dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
*(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
break;
case GetHubDescriptor:
desc->bDescriptorType = 0x29;
desc->bHubContrCurrent = 0;
desc->bNbrPorts = roothub_id;
desc->bDescLength = 9;
desc->bPwrOn2PwrGood = 0;
desc->wHubCharacteristics = cpu_to_le16(0x0011);
desc->u.hs.DeviceRemovable[0] = (roothub_id << 1);
desc->u.hs.DeviceRemovable[1] = ~0;
dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
break;
}
return 0;
}
static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
struct device *dev = usbhs_priv_to_dev(priv);
int ret = -EPIPE;
switch (typeReq) {
/* Hub Feature */
case ClearHubFeature:
case SetHubFeature:
ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
wValue, wIndex, buf, wLength);
break;
/* Port Feature */
case SetPortFeature:
case ClearPortFeature:
ret = __usbhsh_hub_port_feature(hpriv, typeReq,
wValue, wIndex, buf, wLength);
break;
/* Get status */
case GetHubStatus:
case GetPortStatus:
case GetHubDescriptor:
ret = __usbhsh_hub_get_status(hpriv, typeReq,
wValue, wIndex, buf, wLength);
break;
}
dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
typeReq, ret, usbhsh_port_stat_get(hpriv));
return ret;
}
static int usbhsh_bus_nop(struct usb_hcd *hcd)
{
/* nothing to do */
return 0;
}
static struct hc_driver usbhsh_driver = {
.description = usbhsh_hcd_name,
.hcd_priv_size = sizeof(struct usbhsh_hpriv),
/*
* generic hardware linkage
*/
.flags = HCD_USB2,
.start = usbhsh_host_start,
.stop = usbhsh_host_stop,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = usbhsh_urb_enqueue,
.urb_dequeue = usbhsh_urb_dequeue,
.endpoint_disable = usbhsh_endpoint_disable,
/*
* root hub
*/
.hub_status_data = usbhsh_hub_status_data,
.hub_control = usbhsh_hub_control,
.bus_suspend = usbhsh_bus_nop,
.bus_resume = usbhsh_bus_nop,
};
/*
* interrupt functions
*/
static int usbhsh_irq_attch(struct usbhs_priv *priv,
struct usbhs_irq_state *irq_state)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct device *dev = usbhs_priv_to_dev(priv);
dev_dbg(dev, "device attached\n");
usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
/*
* attch interrupt might happen infinitely on some device
* (on self power USB hub ?)
* disable it here.
*
* usbhsh_is_running() becomes effective
* according to this process.
* see
* usbhsh_is_running()
* usbhsh_urb_enqueue()
*/
hpriv->mod.irq_attch = NULL;
usbhs_irq_callback_update(priv, &hpriv->mod);
return 0;
}
static int usbhsh_irq_dtch(struct usbhs_priv *priv,
struct usbhs_irq_state *irq_state)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct device *dev = usbhs_priv_to_dev(priv);
dev_dbg(dev, "device detached\n");
usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
/*
* enable attch interrupt again
*
* usbhsh_is_running() becomes invalid
* according to this process.
* see
* usbhsh_is_running()
* usbhsh_urb_enqueue()
*/
hpriv->mod.irq_attch = usbhsh_irq_attch;
usbhs_irq_callback_update(priv, &hpriv->mod);
/*
* usbhsh_queue_force_pop_all() should be called
* after usbhsh_is_running() becomes invalid.
*/
usbhsh_queue_force_pop_all(priv);
return 0;
}
static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
struct usbhs_irq_state *irq_state)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct device *dev = usbhs_priv_to_dev(priv);
dev_dbg(dev, "setup packet OK\n");
complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
return 0;
}
static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
struct usbhs_irq_state *irq_state)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct device *dev = usbhs_priv_to_dev(priv);
dev_dbg(dev, "setup packet Err\n");
complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
return 0;
}
/*
* module start/stop
*/
static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct usbhs_pipe *pipe;
u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
int pipe_size = usbhs_get_dparam(priv, pipe_size);
int old_type, dir_in, i;
/* init all pipe */
old_type = USB_ENDPOINT_XFER_CONTROL;
for (i = 0; i < pipe_size; i++) {
/*
* data "output" will be finished as soon as possible,
* but there is no guaranty at data "input" case.
*
* "input" needs "standby" pipe.
* So, "input" direction pipe > "output" direction pipe
* is good idea.
*
* 1st USB_ENDPOINT_XFER_xxx will be output direction,
* and the other will be input direction here.
*
* ex)
* ...
* USB_ENDPOINT_XFER_ISOC -> dir out
* USB_ENDPOINT_XFER_ISOC -> dir in
* USB_ENDPOINT_XFER_BULK -> dir out
* USB_ENDPOINT_XFER_BULK -> dir in
* USB_ENDPOINT_XFER_BULK -> dir in
* ...
*/
dir_in = (pipe_type[i] == old_type);
old_type = pipe_type[i];
if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
pipe = usbhs_dcp_malloc(priv);
usbhsh_hpriv_to_dcp(hpriv) = pipe;
} else {
pipe = usbhs_pipe_malloc(priv,
pipe_type[i],
dir_in);
}
pipe->mod_private = NULL;
}
}
static int usbhsh_start(struct usbhs_priv *priv)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
struct device *dev = usbhs_priv_to_dev(priv);
int ret;
/* add hcd */
ret = usb_add_hcd(hcd, 0, 0);
if (ret < 0)
return 0;
/*
* pipe initialize and enable DCP
*/
usbhs_pipe_init(priv,
usbhsh_dma_map_ctrl);
usbhs_fifo_init(priv);
usbhsh_pipe_init_for_host(priv);
/*
* system config enble
* - HI speed
* - host
* - usb module
*/
usbhs_sys_host_ctrl(priv, 1);
/*
* enable irq callback
*/
mod->irq_attch = usbhsh_irq_attch;
mod->irq_dtch = usbhsh_irq_dtch;
mod->irq_sack = usbhsh_irq_setup_ack;
mod->irq_sign = usbhsh_irq_setup_err;
usbhs_irq_callback_update(priv, mod);
dev_dbg(dev, "start host\n");
return ret;
}
static int usbhsh_stop(struct usbhs_priv *priv)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
struct device *dev = usbhs_priv_to_dev(priv);
/*
* disable irq callback
*/
mod->irq_attch = NULL;
mod->irq_dtch = NULL;
mod->irq_sack = NULL;
mod->irq_sign = NULL;
usbhs_irq_callback_update(priv, mod);
usb_remove_hcd(hcd);
/* disable sys */
usbhs_sys_host_ctrl(priv, 0);
dev_dbg(dev, "quit host\n");
return 0;
}
int usbhs_mod_host_probe(struct usbhs_priv *priv)
{
struct usbhsh_hpriv *hpriv;
struct usb_hcd *hcd;
struct usbhsh_device *udev;
struct device *dev = usbhs_priv_to_dev(priv);
int i;
/* initialize hcd */
hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
if (!hcd) {
dev_err(dev, "Failed to create hcd\n");
return -ENOMEM;
}
hcd->has_tt = 1; /* for low/full speed */
/*
* CAUTION
*
* There is no guarantee that it is possible to access usb module here.
* Don't accesses to it.
* The accesse will be enable after "usbhsh_start"
*/
hpriv = usbhsh_hcd_to_hpriv(hcd);
/*
* register itself
*/
usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
/* init hpriv */
hpriv->mod.name = "host";
hpriv->mod.start = usbhsh_start;
hpriv->mod.stop = usbhsh_stop;
usbhsh_port_stat_init(hpriv);
/* init all device */
usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
udev->usbv = NULL;
INIT_LIST_HEAD(&udev->ep_list_head);
}
dev_info(dev, "host probed\n");
return 0;
}
int usbhs_mod_host_remove(struct usbhs_priv *priv)
{
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
usb_put_hcd(hcd);
return 0;
}