usb: renesas_usbhs: add usbhs_pipe_attach() method
driver has to re-use the limited pipe for each device/endpoint when it is USB host hub mode, since number of pipe has limitation. This patch adds usbhsh_pipe_attach/detach() functions for it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Kuninori Morimoto
Felipe Balbi
parent
e4c57ded48
commit
e5679d07a6
1 changed files with 172 additions and 128 deletions
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@ -45,32 +45,31 @@
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*
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* +--------+ pipes are reused for each uep.
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* | udev 1 |-+- [uep 0 (dcp) ] --+ pipe will be switched when
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* +--------+ | | target device was changed
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* +--------+ | | other device requested
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* +- [uep 1 (bulk)] --|---+ +--------------+
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* | +--------------> | pipe0 (dcp) |
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* +- [uep 2 (bulk)] --|---|---+ +--------------+
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* | | | | pipe1 (isoc) |
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* +--------+ | | | +--------------+
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* | udev 2 |-+- [uep 0 (dcp) ] --+ +-- |------> | pipe2 (bulk) |
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* +--------+ | | | | +--------------+
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* +- [uep 1 (int) ] --|-+ | +------> | pipe3 (bulk) |
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* | | | | +--------------+
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* +--------+ | +-|---|------> | pipe4 (int) |
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* | udev 3 |-+- [uep 0 (dcp) ] --+ | | +--------------+
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* +--------+ | | | | .... |
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* +- [uep 1 (bulk)] ------+ | | .... |
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* +- [uep 2 (bulk)] -@ | +--------------+
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* | | pipe1 (isoc) |
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* +--------+ | +--------------+
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* | udev 2 |-+- [uep 0 (dcp) ] -@ +----------> | pipe2 (bulk) |
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* +--------+ | +--------------+
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* +- [uep 1 (int) ] ----+ +------> | pipe3 (bulk) |
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* | | +--------------+
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* +--------+ +-----|------> | pipe4 (int) |
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* | udev 3 |-+- [uep 0 (dcp) ] -@ | +--------------+
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* +--------+ | | | .... |
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* +- [uep 1 (bulk)] -@ | | .... |
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* | |
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* +- [uep 2 (bulk)]-----------+
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*
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* @ : uep requested free pipe, but all have been used.
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* now it is waiting for free pipe
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*/
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/*
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* struct
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*/
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struct usbhsh_pipe_info {
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unsigned int usr_cnt; /* see usbhsh_endpoint_alloc() */
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};
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struct usbhsh_request {
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struct urb *urb;
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struct usbhs_pkt pkt;
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@ -82,12 +81,10 @@ struct usbhsh_device {
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};
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struct usbhsh_ep {
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struct usbhs_pipe *pipe;
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struct usbhs_pipe *pipe; /* attached pipe */
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struct usbhsh_device *udev; /* attached udev */
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struct usb_host_endpoint *ep;
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struct list_head ep_list; /* list to usbhsh_device */
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int maxp;
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};
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#define USBHSH_DEVICE_MAX 10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
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@ -98,9 +95,6 @@ struct usbhsh_hpriv {
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struct usbhsh_device udev[USBHSH_DEVICE_MAX];
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struct usbhsh_pipe_info *pipe_info;
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int pipe_size;
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u32 port_stat; /* USB_PORT_STAT_xxx */
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struct completion setup_ack_done;
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@ -115,17 +109,6 @@ static const char usbhsh_hcd_name[] = "renesas_usbhs host";
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#define usbhsh_priv_to_hpriv(priv) \
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container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
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#define __usbhsh_for_each_hpipe(start, pos, h, i) \
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for (i = start, pos = (h)->hpipe + i; \
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i < (h)->hpipe_size; \
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i++, pos = (h)->hpipe + i)
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#define usbhsh_for_each_hpipe(pos, hpriv, i) \
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__usbhsh_for_each_hpipe(1, pos, hpriv, i)
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#define usbhsh_for_each_hpipe_with_dcp(pos, hpriv, i) \
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__usbhsh_for_each_hpipe(0, pos, hpriv, i)
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#define __usbhsh_for_each_udev(start, pos, h, i) \
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for (i = start, pos = (h)->udev + i; \
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i < USBHSH_DEVICE_MAX; \
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@ -158,7 +141,7 @@ static const char usbhsh_hcd_name[] = "renesas_usbhs host";
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#define usbhsh_udev_to_usbv(h) ((h)->usbv)
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#define usbhsh_udev_is_used(h) usbhsh_udev_to_usbv(h)
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#define usbhsh_pipe_info(p) ((p)->mod_private)
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#define usbhsh_pipe_to_uep(p) ((p)->mod_private)
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#define usbhsh_device_parent(d) (usbhsh_usbv_to_udev((d)->usbv->parent))
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#define usbhsh_device_hubport(d) ((d)->usbv->portnum)
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@ -208,10 +191,129 @@ static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
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}
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/*
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* end-point control
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* pipe control
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*/
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static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
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struct urb *urb);
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static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
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struct urb *urb)
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{
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struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
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struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
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struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
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struct usbhs_pipe *pipe;
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struct usb_endpoint_descriptor *desc = &urb->ep->desc;
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struct device *dev = usbhs_priv_to_dev(priv);
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unsigned long flags;
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int dir_in_req = !!usb_pipein(urb->pipe);
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int is_dcp = usb_endpoint_xfer_control(desc);
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int i, dir_in;
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int ret = -EBUSY;
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/******************** spin lock ********************/
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usbhs_lock(priv, flags);
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if (unlikely(usbhsh_uep_to_pipe(uep))) {
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dev_err(dev, "uep already has pipe\n");
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goto usbhsh_pipe_attach_done;
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}
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usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
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/* check pipe type */
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if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
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continue;
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/* check pipe direction if normal pipe */
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if (!is_dcp) {
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dir_in = !!usbhs_pipe_is_dir_in(pipe);
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if (0 != (dir_in - dir_in_req))
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continue;
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}
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/* check pipe is free */
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if (usbhsh_pipe_to_uep(pipe))
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continue;
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/*
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* attach pipe to uep
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*
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* usbhs_pipe_config_update() should be called after
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* usbhs_set_device_config()
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* see
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* DCPMAXP/PIPEMAXP
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*/
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usbhsh_uep_to_pipe(uep) = pipe;
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usbhsh_pipe_to_uep(pipe) = uep;
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if (!usb_gettoggle(urb->dev,
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usb_pipeendpoint(urb->pipe),
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usb_pipeout(urb->pipe))) {
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usbhs_pipe_sequence_data0(pipe);
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usb_settoggle(urb->dev,
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usb_pipeendpoint(urb->pipe),
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usb_pipeout(urb->pipe), 1);
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}
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usbhs_pipe_config_update(pipe,
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usbhsh_device_number(hpriv, udev),
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usb_endpoint_num(desc),
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usb_endpoint_maxp(desc));
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dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
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usbhsh_device_number(hpriv, udev),
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usb_endpoint_num(desc),
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usbhs_pipe_name(pipe),
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dir_in_req ? "in" : "out");
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ret = 0;
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break;
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}
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usbhsh_pipe_attach_done:
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usbhs_unlock(priv, flags);
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/******************** spin unlock ******************/
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return ret;
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}
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static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
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struct usbhsh_ep *uep)
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{
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struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
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struct usbhs_pipe *pipe;
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struct device *dev = usbhs_priv_to_dev(priv);
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unsigned long flags;
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/******************** spin lock ********************/
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usbhs_lock(priv, flags);
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pipe = usbhsh_uep_to_pipe(uep);
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if (unlikely(!pipe)) {
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dev_err(dev, "uep doens't have pipe\n");
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} else {
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struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
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struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
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/* detach pipe from uep */
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usbhsh_uep_to_pipe(uep) = NULL;
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usbhsh_pipe_to_uep(pipe) = NULL;
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dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
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usbhsh_device_number(hpriv, udev),
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usb_endpoint_num(&ep->desc),
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usbhs_pipe_name(pipe));
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}
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usbhs_unlock(priv, flags);
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/******************** spin unlock ******************/
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}
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/*
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* endpoint control
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*/
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static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
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struct urb *urb,
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gfp_t mem_flags)
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@ -220,8 +322,6 @@ static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
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struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
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struct usb_host_endpoint *ep = urb->ep;
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struct usbhsh_ep *uep;
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struct usbhsh_pipe_info *info;
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struct usbhs_pipe *best_pipe = NULL;
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struct device *dev = usbhs_priv_to_dev(priv);
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struct usb_endpoint_descriptor *desc = &ep->desc;
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unsigned long flags;
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@ -236,78 +336,21 @@ static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
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usbhs_lock(priv, flags);
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/*
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* find best pipe for endpoint
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* see
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* HARDWARE LIMITATION
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* init endpoint
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*/
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if (usb_endpoint_xfer_control(desc)) {
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/* best pipe is DCP */
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best_pipe = usbhsh_hpriv_to_dcp(hpriv);
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} else {
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struct usbhs_pipe *pipe;
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unsigned int min_usr = ~0;
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int dir_in_req = !!usb_pipein(urb->pipe);
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int i, dir_in;
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INIT_LIST_HEAD(&uep->ep_list);
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list_add_tail(&uep->ep_list, &udev->ep_list_head);
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usbhs_for_each_pipe(pipe, priv, i) {
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if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
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continue;
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dir_in = !!usbhs_pipe_is_dir_in(pipe);
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if (0 != (dir_in - dir_in_req))
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continue;
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info = usbhsh_pipe_info(pipe);
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if (min_usr > info->usr_cnt) {
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min_usr = info->usr_cnt;
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best_pipe = pipe;
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}
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}
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}
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if (best_pipe) {
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/* update pipe user count */
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info = usbhsh_pipe_info(best_pipe);
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info->usr_cnt++;
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/* init this endpoint, and attach it to udev */
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INIT_LIST_HEAD(&uep->ep_list);
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list_add_tail(&uep->ep_list, &udev->ep_list_head);
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}
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usbhs_unlock(priv, flags);
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/******************** spin unlock ******************/
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if (unlikely(!best_pipe)) {
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dev_err(dev, "couldn't find best pipe\n");
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kfree(uep);
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return -EIO;
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}
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/*
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* init uep
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*/
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uep->pipe = best_pipe;
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uep->maxp = usb_endpoint_maxp(desc);
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usbhsh_uep_to_udev(uep) = udev;
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usbhsh_uep_to_ep(uep) = ep;
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usbhsh_ep_to_uep(ep) = uep;
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/*
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* usbhs_pipe_config_update() should be called after
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* usbhs_set_device_config()
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* see
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* DCPMAXP/PIPEMAXP
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*/
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usbhs_pipe_sequence_data0(uep->pipe);
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usbhs_pipe_config_update(uep->pipe,
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usbhsh_device_number(hpriv, udev),
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usb_endpoint_num(desc),
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uep->maxp);
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usbhs_unlock(priv, flags);
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/******************** spin unlock ******************/
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dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
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dev_dbg(dev, "%s [%d-%d]\n", __func__,
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usbhsh_device_number(hpriv, udev),
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usbhs_pipe_name(uep->pipe), uep);
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usb_endpoint_num(desc));
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return 0;
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}
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@ -318,27 +361,24 @@ static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
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struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
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struct device *dev = usbhs_priv_to_dev(priv);
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struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
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struct usbhsh_pipe_info *info;
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unsigned long flags;
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if (!uep)
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return;
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dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
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dev_dbg(dev, "%s [%d-%d]\n", __func__,
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usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
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usbhs_pipe_name(uep->pipe), uep);
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usb_endpoint_num(&ep->desc));
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if (usbhsh_uep_to_pipe(uep))
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usbhsh_pipe_detach(hpriv, uep);
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/******************** spin lock ********************/
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usbhs_lock(priv, flags);
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info = usbhsh_pipe_info(uep->pipe);
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info->usr_cnt--;
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/* remove this endpoint from udev */
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list_del_init(&uep->ep_list);
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uep->pipe = NULL;
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uep->maxp = 0;
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usbhsh_uep_to_udev(uep) = NULL;
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usbhsh_uep_to_ep(uep) = NULL;
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usbhsh_ep_to_uep(ep) = NULL;
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@ -545,6 +585,7 @@ static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
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struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
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struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
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struct urb *urb = ureq->urb;
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struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
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struct device *dev = usbhs_priv_to_dev(priv);
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dev_dbg(dev, "%s\n", __func__);
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@ -559,6 +600,8 @@ static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
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usb_hcd_unlink_urb_from_ep(hcd, urb);
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usb_hcd_giveback_urb(hcd, urb, 0);
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usbhsh_pipe_detach(hpriv, uep);
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}
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static int usbhsh_queue_push(struct usb_hcd *hcd,
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@ -811,7 +854,7 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
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struct usb_host_endpoint *ep = urb->ep;
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struct usbhsh_device *new_udev = NULL;
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int is_dir_in = usb_pipein(urb->pipe);
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int i;
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int ret;
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dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
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@ -822,6 +865,7 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
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/*
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* attach udev if needed
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* see [image of mod_host]
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*/
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if (!usbhsh_device_get(hpriv, urb)) {
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new_udev = usbhsh_device_attach(hpriv, urb);
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@ -833,6 +877,7 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
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/*
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* attach endpoint if needed
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* see [image of mod_host]
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*/
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if (!usbhsh_ep_to_uep(ep)) {
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ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
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@ -840,6 +885,20 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
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goto usbhsh_urb_enqueue_error_free_device;
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}
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/*
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* attach pipe to endpoint
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* see [image of mod_host]
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*/
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for (i = 0; i < 1024; i++) {
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ret = usbhsh_pipe_attach(hpriv, urb);
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if (ret < 0)
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msleep(100);
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else
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break;
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}
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if (ret < 0)
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goto usbhsh_urb_enqueue_error_free_endpoint;
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/*
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* push packet
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*/
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@ -850,6 +909,8 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
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return ret;
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||||
|
||||
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);
|
||||
|
|
@ -1192,7 +1253,6 @@ static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
|
|||
static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
|
||||
{
|
||||
struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
|
||||
struct usbhsh_pipe_info *pipe_info = hpriv->pipe_info;
|
||||
struct usbhs_pipe *pipe;
|
||||
u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
|
||||
int pipe_size = usbhs_get_dparam(priv, pipe_size);
|
||||
|
|
@ -1201,7 +1261,6 @@ static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
|
|||
/* init all pipe */
|
||||
old_type = USB_ENDPOINT_XFER_CONTROL;
|
||||
for (i = 0; i < pipe_size; i++) {
|
||||
pipe_info[i].usr_cnt = 0;
|
||||
|
||||
/*
|
||||
* data "output" will be finished as soon as possible,
|
||||
|
|
@ -1235,7 +1294,7 @@ static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
|
|||
dir_in);
|
||||
}
|
||||
|
||||
pipe->mod_private = pipe_info + i;
|
||||
pipe->mod_private = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1312,10 +1371,8 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
|
|||
{
|
||||
struct usbhsh_hpriv *hpriv;
|
||||
struct usb_hcd *hcd;
|
||||
struct usbhsh_pipe_info *pipe_info;
|
||||
struct usbhsh_device *udev;
|
||||
struct device *dev = usbhs_priv_to_dev(priv);
|
||||
int pipe_size = usbhs_get_dparam(priv, pipe_size);
|
||||
int i;
|
||||
|
||||
/* initialize hcd */
|
||||
|
|
@ -1325,12 +1382,6 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
|
|||
return -ENOMEM;
|
||||
}
|
||||
|
||||
pipe_info = kzalloc(sizeof(*pipe_info) * pipe_size, GFP_KERNEL);
|
||||
if (!pipe_info) {
|
||||
dev_err(dev, "Could not allocate pipe_info\n");
|
||||
goto usbhs_mod_host_probe_err;
|
||||
}
|
||||
|
||||
/*
|
||||
* CAUTION
|
||||
*
|
||||
|
|
@ -1350,8 +1401,6 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
|
|||
hpriv->mod.name = "host";
|
||||
hpriv->mod.start = usbhsh_start;
|
||||
hpriv->mod.stop = usbhsh_stop;
|
||||
hpriv->pipe_info = pipe_info;
|
||||
hpriv->pipe_size = pipe_size;
|
||||
usbhsh_port_stat_init(hpriv);
|
||||
|
||||
/* init all device */
|
||||
|
|
@ -1363,11 +1412,6 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
|
|||
dev_info(dev, "host probed\n");
|
||||
|
||||
return 0;
|
||||
|
||||
usbhs_mod_host_probe_err:
|
||||
usb_put_hcd(hcd);
|
||||
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
int usbhs_mod_host_remove(struct usbhs_priv *priv)
|
||||
|
|
|
|||
Reference in a new issue