From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/usb/host/xhci-dbgtty.c | 263 +++++++++++++++++++++++++++++++---------------------
1 files changed, 156 insertions(+), 107 deletions(-)
diff --git a/kernel/drivers/usb/host/xhci-dbgtty.c b/kernel/drivers/usb/host/xhci-dbgtty.c
index aff79ff..2a53b28 100644
--- a/kernel/drivers/usb/host/xhci-dbgtty.c
+++ b/kernel/drivers/usb/host/xhci-dbgtty.c
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
-/**
+/*
* xhci-dbgtty.c - tty glue for xHCI debug capability
*
* Copyright (C) 2017 Intel Corporation
@@ -13,6 +13,16 @@
#include "xhci.h"
#include "xhci-dbgcap.h"
+
+static int dbc_tty_init(void);
+static void dbc_tty_exit(void);
+
+static struct tty_driver *dbc_tty_driver;
+
+static inline struct dbc_port *dbc_to_port(struct xhci_dbc *dbc)
+{
+ return dbc->priv;
+}
static unsigned int
dbc_send_packet(struct dbc_port *port, char *packet, unsigned int size)
@@ -48,7 +58,7 @@
list_del(&req->list_pool);
spin_unlock(&port->port_lock);
- status = dbc_ep_queue(port->out, req, GFP_ATOMIC);
+ status = dbc_ep_queue(req);
spin_lock(&port->port_lock);
if (status) {
@@ -80,7 +90,7 @@
req->length = DBC_MAX_PACKET;
spin_unlock(&port->port_lock);
- status = dbc_ep_queue(port->in, req, GFP_ATOMIC);
+ status = dbc_ep_queue(req);
spin_lock(&port->port_lock);
if (status) {
@@ -91,11 +101,10 @@
}
static void
-dbc_read_complete(struct xhci_hcd *xhci, struct dbc_request *req)
+dbc_read_complete(struct xhci_dbc *dbc, struct dbc_request *req)
{
unsigned long flags;
- struct xhci_dbc *dbc = xhci->dbc;
- struct dbc_port *port = &dbc->port;
+ struct dbc_port *port = dbc_to_port(dbc);
spin_lock_irqsave(&port->port_lock, flags);
list_add_tail(&req->list_pool, &port->read_queue);
@@ -103,11 +112,10 @@
spin_unlock_irqrestore(&port->port_lock, flags);
}
-static void dbc_write_complete(struct xhci_hcd *xhci, struct dbc_request *req)
+static void dbc_write_complete(struct xhci_dbc *dbc, struct dbc_request *req)
{
unsigned long flags;
- struct xhci_dbc *dbc = xhci->dbc;
- struct dbc_port *port = &dbc->port;
+ struct dbc_port *port = dbc_to_port(dbc);
spin_lock_irqsave(&port->port_lock, flags);
list_add(&req->list_pool, &port->write_pool);
@@ -118,35 +126,36 @@
case -ESHUTDOWN:
break;
default:
- xhci_warn(xhci, "unexpected write complete status %d\n",
+ dev_warn(dbc->dev, "unexpected write complete status %d\n",
req->status);
break;
}
spin_unlock_irqrestore(&port->port_lock, flags);
}
-static void xhci_dbc_free_req(struct dbc_ep *dep, struct dbc_request *req)
+static void xhci_dbc_free_req(struct dbc_request *req)
{
kfree(req->buf);
- dbc_free_request(dep, req);
+ dbc_free_request(req);
}
static int
-xhci_dbc_alloc_requests(struct dbc_ep *dep, struct list_head *head,
- void (*fn)(struct xhci_hcd *, struct dbc_request *))
+xhci_dbc_alloc_requests(struct xhci_dbc *dbc, unsigned int direction,
+ struct list_head *head,
+ void (*fn)(struct xhci_dbc *, struct dbc_request *))
{
int i;
struct dbc_request *req;
for (i = 0; i < DBC_QUEUE_SIZE; i++) {
- req = dbc_alloc_request(dep, GFP_ATOMIC);
+ req = dbc_alloc_request(dbc, direction, GFP_KERNEL);
if (!req)
break;
req->length = DBC_MAX_PACKET;
req->buf = kmalloc(req->length, GFP_KERNEL);
if (!req->buf) {
- xhci_dbc_free_req(dep, req);
+ dbc_free_request(req);
break;
}
@@ -158,14 +167,14 @@
}
static void
-xhci_dbc_free_requests(struct dbc_ep *dep, struct list_head *head)
+xhci_dbc_free_requests(struct list_head *head)
{
struct dbc_request *req;
while (!list_empty(head)) {
req = list_entry(head->next, struct dbc_request, list_pool);
list_del(&req->list_pool);
- xhci_dbc_free_req(dep, req);
+ xhci_dbc_free_req(req);
}
}
@@ -279,63 +288,14 @@
.unthrottle = dbc_tty_unthrottle,
};
-static struct tty_driver *dbc_tty_driver;
-
-int xhci_dbc_tty_register_driver(struct xhci_hcd *xhci)
-{
- int status;
- struct xhci_dbc *dbc = xhci->dbc;
-
- dbc_tty_driver = tty_alloc_driver(1, TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_DYNAMIC_DEV);
- if (IS_ERR(dbc_tty_driver)) {
- status = PTR_ERR(dbc_tty_driver);
- dbc_tty_driver = NULL;
- return status;
- }
-
- dbc_tty_driver->driver_name = "dbc_serial";
- dbc_tty_driver->name = "ttyDBC";
-
- dbc_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- dbc_tty_driver->subtype = SERIAL_TYPE_NORMAL;
- dbc_tty_driver->init_termios = tty_std_termios;
- dbc_tty_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- dbc_tty_driver->init_termios.c_ispeed = 9600;
- dbc_tty_driver->init_termios.c_ospeed = 9600;
- dbc_tty_driver->driver_state = &dbc->port;
-
- tty_set_operations(dbc_tty_driver, &dbc_tty_ops);
-
- status = tty_register_driver(dbc_tty_driver);
- if (status) {
- xhci_err(xhci,
- "can't register dbc tty driver, err %d\n", status);
- put_tty_driver(dbc_tty_driver);
- dbc_tty_driver = NULL;
- }
-
- return status;
-}
-
-void xhci_dbc_tty_unregister_driver(void)
-{
- if (dbc_tty_driver) {
- tty_unregister_driver(dbc_tty_driver);
- put_tty_driver(dbc_tty_driver);
- dbc_tty_driver = NULL;
- }
-}
-
-static void dbc_rx_push(unsigned long _port)
+static void dbc_rx_push(struct tasklet_struct *t)
{
struct dbc_request *req;
struct tty_struct *tty;
unsigned long flags;
bool do_push = false;
bool disconnect = false;
- struct dbc_port *port = (void *)_port;
+ struct dbc_port *port = from_tasklet(port, t, push);
struct list_head *queue = &port->read_queue;
spin_lock_irqsave(&port->port_lock, flags);
@@ -418,17 +378,15 @@
};
static void
-xhci_dbc_tty_init_port(struct xhci_hcd *xhci, struct dbc_port *port)
+xhci_dbc_tty_init_port(struct xhci_dbc *dbc, struct dbc_port *port)
{
tty_port_init(&port->port);
spin_lock_init(&port->port_lock);
- tasklet_init(&port->push, dbc_rx_push, (unsigned long)port);
+ tasklet_setup(&port->push, dbc_rx_push);
INIT_LIST_HEAD(&port->read_pool);
INIT_LIST_HEAD(&port->read_queue);
INIT_LIST_HEAD(&port->write_pool);
- port->in = get_in_ep(xhci);
- port->out = get_out_ep(xhci);
port->port.ops = &dbc_port_ops;
port->n_read = 0;
}
@@ -440,66 +398,157 @@
tty_port_destroy(&port->port);
}
-int xhci_dbc_tty_register_device(struct xhci_hcd *xhci)
+static int xhci_dbc_tty_register_device(struct xhci_dbc *dbc)
{
int ret;
struct device *tty_dev;
- struct xhci_dbc *dbc = xhci->dbc;
- struct dbc_port *port = &dbc->port;
+ struct dbc_port *port = dbc_to_port(dbc);
- xhci_dbc_tty_init_port(xhci, port);
+ if (port->registered)
+ return -EBUSY;
+
+ xhci_dbc_tty_init_port(dbc, port);
+
+ ret = kfifo_alloc(&port->write_fifo, DBC_WRITE_BUF_SIZE, GFP_KERNEL);
+ if (ret)
+ goto err_exit_port;
+
+ ret = xhci_dbc_alloc_requests(dbc, BULK_IN, &port->read_pool,
+ dbc_read_complete);
+ if (ret)
+ goto err_free_fifo;
+
+ ret = xhci_dbc_alloc_requests(dbc, BULK_OUT, &port->write_pool,
+ dbc_write_complete);
+ if (ret)
+ goto err_free_requests;
+
tty_dev = tty_port_register_device(&port->port,
dbc_tty_driver, 0, NULL);
if (IS_ERR(tty_dev)) {
ret = PTR_ERR(tty_dev);
- goto register_fail;
+ goto err_free_requests;
}
-
- ret = kfifo_alloc(&port->write_fifo, DBC_WRITE_BUF_SIZE, GFP_KERNEL);
- if (ret)
- goto buf_alloc_fail;
-
- ret = xhci_dbc_alloc_requests(port->in, &port->read_pool,
- dbc_read_complete);
- if (ret)
- goto request_fail;
-
- ret = xhci_dbc_alloc_requests(port->out, &port->write_pool,
- dbc_write_complete);
- if (ret)
- goto request_fail;
port->registered = true;
return 0;
-request_fail:
- xhci_dbc_free_requests(port->in, &port->read_pool);
- xhci_dbc_free_requests(port->out, &port->write_pool);
+err_free_requests:
+ xhci_dbc_free_requests(&port->read_pool);
+ xhci_dbc_free_requests(&port->write_pool);
+err_free_fifo:
kfifo_free(&port->write_fifo);
-
-buf_alloc_fail:
- tty_unregister_device(dbc_tty_driver, 0);
-
-register_fail:
+err_exit_port:
xhci_dbc_tty_exit_port(port);
- xhci_err(xhci, "can't register tty port, err %d\n", ret);
+ dev_err(dbc->dev, "can't register tty port, err %d\n", ret);
return ret;
}
-void xhci_dbc_tty_unregister_device(struct xhci_hcd *xhci)
+static void xhci_dbc_tty_unregister_device(struct xhci_dbc *dbc)
{
- struct xhci_dbc *dbc = xhci->dbc;
- struct dbc_port *port = &dbc->port;
+ struct dbc_port *port = dbc_to_port(dbc);
+ if (!port->registered)
+ return;
tty_unregister_device(dbc_tty_driver, 0);
xhci_dbc_tty_exit_port(port);
port->registered = false;
kfifo_free(&port->write_fifo);
- xhci_dbc_free_requests(get_out_ep(xhci), &port->read_pool);
- xhci_dbc_free_requests(get_out_ep(xhci), &port->read_queue);
- xhci_dbc_free_requests(get_in_ep(xhci), &port->write_pool);
+ xhci_dbc_free_requests(&port->read_pool);
+ xhci_dbc_free_requests(&port->read_queue);
+ xhci_dbc_free_requests(&port->write_pool);
+}
+
+static const struct dbc_driver dbc_driver = {
+ .configure = xhci_dbc_tty_register_device,
+ .disconnect = xhci_dbc_tty_unregister_device,
+};
+
+int xhci_dbc_tty_probe(struct xhci_hcd *xhci)
+{
+ struct xhci_dbc *dbc = xhci->dbc;
+ struct dbc_port *port;
+ int status;
+
+ /* dbc_tty_init will be called by module init() in the future */
+ status = dbc_tty_init();
+ if (status)
+ return status;
+
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
+ if (!port) {
+ status = -ENOMEM;
+ goto out;
+ }
+
+ dbc->driver = &dbc_driver;
+ dbc->priv = port;
+
+
+ dbc_tty_driver->driver_state = port;
+
+ return 0;
+out:
+ /* dbc_tty_exit will be called by module_exit() in the future */
+ dbc_tty_exit();
+ return status;
+}
+
+/*
+ * undo what probe did, assume dbc is stopped already.
+ * we also assume tty_unregister_device() is called before this
+ */
+void xhci_dbc_tty_remove(struct xhci_dbc *dbc)
+{
+ struct dbc_port *port = dbc_to_port(dbc);
+
+ dbc->driver = NULL;
+ dbc->priv = NULL;
+ kfree(port);
+
+ /* dbc_tty_exit will be called by module_exit() in the future */
+ dbc_tty_exit();
+}
+
+static int dbc_tty_init(void)
+{
+ int ret;
+
+ dbc_tty_driver = tty_alloc_driver(1, TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV);
+ if (IS_ERR(dbc_tty_driver))
+ return PTR_ERR(dbc_tty_driver);
+
+ dbc_tty_driver->driver_name = "dbc_serial";
+ dbc_tty_driver->name = "ttyDBC";
+
+ dbc_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ dbc_tty_driver->subtype = SERIAL_TYPE_NORMAL;
+ dbc_tty_driver->init_termios = tty_std_termios;
+ dbc_tty_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ dbc_tty_driver->init_termios.c_ispeed = 9600;
+ dbc_tty_driver->init_termios.c_ospeed = 9600;
+
+ tty_set_operations(dbc_tty_driver, &dbc_tty_ops);
+
+ ret = tty_register_driver(dbc_tty_driver);
+ if (ret) {
+ pr_err("Can't register dbc tty driver\n");
+ put_tty_driver(dbc_tty_driver);
+ }
+ return ret;
+}
+
+static void dbc_tty_exit(void)
+{
+ if (dbc_tty_driver) {
+ tty_unregister_driver(dbc_tty_driver);
+ put_tty_driver(dbc_tty_driver);
+ dbc_tty_driver = NULL;
+ }
}
--
Gitblit v1.6.2