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linux/drivers/usb/renesas_usbhs/mod_host.c

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/*
* 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; \
((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i)); \
(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_endpoint_sequence_save(hpriv, urb, pkt);
usbhsh_ureq_free(hpriv, ureq);
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 = USB_DT_HUB;
desc->bHubContrCurrent = 0;
desc->bNbrPorts = roothub_id;
desc->bDescLength = 9;
desc->bPwrOn2PwrGood = 0;
desc->wHubCharacteristics =
cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
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;
device_wakeup_enable(hcd->self.controller);
/*
* pipe initialize and enable DCP
*/
usbhs_fifo_init(priv);
usbhs_pipe_init(priv,
usbhsh_dma_map_ctrl);
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;
}
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