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Diffstat (limited to 'drivers/usb/gadget/serial.c')
-rw-r--r--drivers/usb/gadget/serial.c225
1 files changed, 108 insertions, 117 deletions
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index dd33ff0ae4ce..f5738eb8e765 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -17,33 +17,15 @@
*
*/
-#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
#include <linux/utsname.h>
-#include <linux/wait.h>
-#include <linux/proc_fs.h>
#include <linux/device.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
-#include <asm/byteorder.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-#include <asm/unaligned.h>
-#include <asm/uaccess.h>
-
#include <linux/usb/ch9.h>
#include <linux/usb/cdc.h>
-#include <linux/usb_gadget.h>
+#include <linux/usb/gadget.h>
#include "gadget_chips.h"
@@ -88,30 +70,29 @@
#define GS_DEFAULT_PARITY USB_CDC_NO_PARITY
#define GS_DEFAULT_CHAR_FORMAT USB_CDC_1_STOP_BITS
-/* select highspeed/fullspeed, hiding highspeed if not configured */
-#ifdef CONFIG_USB_GADGET_DUALSPEED
-#define GS_SPEED_SELECT(is_hs,hs,fs) ((is_hs) ? (hs) : (fs))
-#else
-#define GS_SPEED_SELECT(is_hs,hs,fs) (fs)
-#endif /* CONFIG_USB_GADGET_DUALSPEED */
+/* maxpacket and other transfer characteristics vary by speed. */
+static inline struct usb_endpoint_descriptor *
+choose_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
+ struct usb_endpoint_descriptor *fs)
+{
+ if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+ return hs;
+ return fs;
+}
+
/* debug settings */
-#ifdef GS_DEBUG
+#ifdef DEBUG
static int debug = 1;
+#else
+#define debug 0
+#endif
#define gs_debug(format, arg...) \
do { if (debug) printk(KERN_DEBUG format, ## arg); } while(0)
#define gs_debug_level(level, format, arg...) \
do { if (debug>=level) printk(KERN_DEBUG format, ## arg); } while(0)
-#else
-
-#define gs_debug(format, arg...) \
- do { } while(0)
-#define gs_debug_level(level, format, arg...) \
- do { } while(0)
-
-#endif /* GS_DEBUG */
/* Thanks to NetChip Technologies for donating this product ID.
*
@@ -146,10 +127,10 @@ struct gs_req_entry {
/* the port structure holds info for each port, one for each minor number */
struct gs_port {
- struct gs_dev *port_dev; /* pointer to device struct */
+ struct gs_dev *port_dev; /* pointer to device struct */
struct tty_struct *port_tty; /* pointer to tty struct */
spinlock_t port_lock;
- int port_num;
+ int port_num;
int port_open_count;
int port_in_use; /* open/close in progress */
wait_queue_head_t port_write_wait;/* waiting to write */
@@ -187,7 +168,7 @@ static void __exit gs_module_exit(void);
/* tty driver */
static int gs_open(struct tty_struct *tty, struct file *file);
static void gs_close(struct tty_struct *tty, struct file *file);
-static int gs_write(struct tty_struct *tty,
+static int gs_write(struct tty_struct *tty,
const unsigned char *buf, int count);
static void gs_put_char(struct tty_struct *tty, unsigned char ch);
static void gs_flush_chars(struct tty_struct *tty);
@@ -221,7 +202,7 @@ static void gs_setup_complete(struct usb_ep *ep, struct usb_request *req);
static void gs_disconnect(struct usb_gadget *gadget);
static int gs_set_config(struct gs_dev *dev, unsigned config);
static void gs_reset_config(struct gs_dev *dev);
-static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed,
+static int gs_build_config_buf(u8 *buf, struct usb_gadget *g,
u8 type, unsigned int index, int is_otg);
static struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned int len,
@@ -258,7 +239,7 @@ static const char *EP_IN_NAME;
static const char *EP_OUT_NAME;
static const char *EP_NOTIFY_NAME;
-static struct semaphore gs_open_close_sem[GS_NUM_PORTS];
+static struct mutex gs_open_close_lock[GS_NUM_PORTS];
static unsigned int read_q_size = GS_DEFAULT_READ_Q_SIZE;
static unsigned int write_q_size = GS_DEFAULT_WRITE_Q_SIZE;
@@ -414,18 +395,18 @@ static const struct usb_cdc_header_desc gs_header_desc = {
};
static const struct usb_cdc_call_mgmt_descriptor gs_call_mgmt_descriptor = {
- .bLength = sizeof(gs_call_mgmt_descriptor),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
- .bmCapabilities = 0,
- .bDataInterface = 1, /* index of data interface */
+ .bLength = sizeof(gs_call_mgmt_descriptor),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
+ .bmCapabilities = 0,
+ .bDataInterface = 1, /* index of data interface */
};
static struct usb_cdc_acm_descriptor gs_acm_descriptor = {
- .bLength = sizeof(gs_acm_descriptor),
- .bDescriptorType = USB_DT_CS_INTERFACE,
- .bDescriptorSubType = USB_CDC_ACM_TYPE,
- .bmCapabilities = 0,
+ .bLength = sizeof(gs_acm_descriptor),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubType = USB_CDC_ACM_TYPE,
+ .bmCapabilities = 0,
};
static const struct usb_cdc_union_desc gs_union_desc = {
@@ -435,7 +416,7 @@ static const struct usb_cdc_union_desc gs_union_desc = {
.bMasterInterface0 = 0, /* index of control interface */
.bSlaveInterface0 = 1, /* index of data interface */
};
-
+
static struct usb_endpoint_descriptor gs_fullspeed_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -481,7 +462,6 @@ static const struct usb_descriptor_header *gs_acm_fullspeed_function[] = {
NULL,
};
-#ifdef CONFIG_USB_GADGET_DUALSPEED
static struct usb_endpoint_descriptor gs_highspeed_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -535,15 +515,13 @@ static const struct usb_descriptor_header *gs_acm_highspeed_function[] = {
NULL,
};
-#endif /* CONFIG_USB_GADGET_DUALSPEED */
-
/* Module */
MODULE_DESCRIPTION(GS_LONG_NAME);
MODULE_AUTHOR("Al Borchers");
MODULE_LICENSE("GPL");
-#ifdef GS_DEBUG
+#ifdef DEBUG
module_param(debug, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(debug, "Enable debugging, 0=off, 1=on");
#endif
@@ -595,7 +573,7 @@ static int __init gs_module_init(void)
tty_set_operations(gs_tty_driver, &gs_tty_ops);
for (i=0; i < GS_NUM_PORTS; i++)
- sema_init(&gs_open_close_sem[i], 1);
+ mutex_init(&gs_open_close_lock[i]);
retval = tty_register_driver(gs_tty_driver);
if (retval) {
@@ -635,7 +613,7 @@ static int gs_open(struct tty_struct *tty, struct file *file)
struct gs_port *port;
struct gs_dev *dev;
struct gs_buf *buf;
- struct semaphore *sem;
+ struct mutex *mtx;
int ret;
port_num = tty->index;
@@ -656,10 +634,10 @@ static int gs_open(struct tty_struct *tty, struct file *file)
return -ENODEV;
}
- sem = &gs_open_close_sem[port_num];
- if (down_interruptible(sem)) {
+ mtx = &gs_open_close_lock[port_num];
+ if (mutex_lock_interruptible(mtx)) {
printk(KERN_ERR
- "gs_open: (%d,%p,%p) interrupted waiting for semaphore\n",
+ "gs_open: (%d,%p,%p) interrupted waiting for mutex\n",
port_num, tty, file);
return -ERESTARTSYS;
}
@@ -754,12 +732,12 @@ static int gs_open(struct tty_struct *tty, struct file *file)
exit_unlock_port:
spin_unlock_irqrestore(&port->port_lock, flags);
- up(sem);
+ mutex_unlock(mtx);
return ret;
exit_unlock_dev:
spin_unlock_irqrestore(&dev->dev_lock, flags);
- up(sem);
+ mutex_unlock(mtx);
return ret;
}
@@ -781,7 +759,7 @@ exit_unlock_dev:
static void gs_close(struct tty_struct *tty, struct file *file)
{
struct gs_port *port = tty->driver_data;
- struct semaphore *sem;
+ struct mutex *mtx;
if (port == NULL) {
printk(KERN_ERR "gs_close: NULL port pointer\n");
@@ -790,8 +768,8 @@ static void gs_close(struct tty_struct *tty, struct file *file)
gs_debug("gs_close: (%d,%p,%p)\n", port->port_num, tty, file);
- sem = &gs_open_close_sem[port->port_num];
- down(sem);
+ mtx = &gs_open_close_lock[port->port_num];
+ mutex_lock(mtx);
spin_lock_irq(&port->port_lock);
@@ -846,7 +824,7 @@ static void gs_close(struct tty_struct *tty, struct file *file)
exit:
spin_unlock_irq(&port->port_lock);
- up(sem);
+ mutex_unlock(mtx);
}
/*
@@ -914,7 +892,8 @@ static void gs_put_char(struct tty_struct *tty, unsigned char ch)
return;
}
- gs_debug("gs_put_char: (%d,%p) char=0x%x, called from %p, %p, %p\n", port->port_num, tty, ch, __builtin_return_address(0), __builtin_return_address(1), __builtin_return_address(2));
+ gs_debug("gs_put_char: (%d,%p) char=0x%x, called from %p\n",
+ port->port_num, tty, ch, __builtin_return_address(0));
spin_lock_irqsave(&port->port_lock, flags);
@@ -1115,7 +1094,11 @@ static int gs_send(struct gs_dev *dev)
len = gs_send_packet(dev, req->buf, ep->maxpacket);
if (len > 0) {
-gs_debug_level(3, "gs_send: len=%d, 0x%2.2x 0x%2.2x 0x%2.2x ...\n", len, *((unsigned char *)req->buf), *((unsigned char *)req->buf+1), *((unsigned char *)req->buf+2));
+ gs_debug_level(3, "gs_send: len=%d, 0x%2.2x "
+ "0x%2.2x 0x%2.2x ...\n", len,
+ *((unsigned char *)req->buf),
+ *((unsigned char *)req->buf+1),
+ *((unsigned char *)req->buf+2));
list_del(&req_entry->re_entry);
req->length = len;
spin_unlock_irqrestore(&dev->dev_lock, flags);
@@ -1268,7 +1251,7 @@ static void gs_read_complete(struct usb_ep *ep, struct usb_request *req)
switch(req->status) {
case 0:
- /* normal completion */
+ /* normal completion */
gs_recv_packet(dev, req->buf, req->actual);
requeue:
req->length = ep->maxpacket;
@@ -1405,29 +1388,30 @@ static int __init gs_bind(struct usb_gadget *gadget)
? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC;
gs_device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
-#ifdef CONFIG_USB_GADGET_DUALSPEED
- gs_qualifier_desc.bDeviceClass = use_acm
- ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC;
- /* assume ep0 uses the same packet size for both speeds */
- gs_qualifier_desc.bMaxPacketSize0 = gs_device_desc.bMaxPacketSize0;
- /* assume endpoints are dual-speed */
- gs_highspeed_notify_desc.bEndpointAddress =
- gs_fullspeed_notify_desc.bEndpointAddress;
- gs_highspeed_in_desc.bEndpointAddress =
- gs_fullspeed_in_desc.bEndpointAddress;
- gs_highspeed_out_desc.bEndpointAddress =
- gs_fullspeed_out_desc.bEndpointAddress;
-#endif /* CONFIG_USB_GADGET_DUALSPEED */
+ if (gadget_is_dualspeed(gadget)) {
+ gs_qualifier_desc.bDeviceClass = use_acm
+ ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC;
+ /* assume ep0 uses the same packet size for both speeds */
+ gs_qualifier_desc.bMaxPacketSize0 =
+ gs_device_desc.bMaxPacketSize0;
+ /* assume endpoints are dual-speed */
+ gs_highspeed_notify_desc.bEndpointAddress =
+ gs_fullspeed_notify_desc.bEndpointAddress;
+ gs_highspeed_in_desc.bEndpointAddress =
+ gs_fullspeed_in_desc.bEndpointAddress;
+ gs_highspeed_out_desc.bEndpointAddress =
+ gs_fullspeed_out_desc.bEndpointAddress;
+ }
usb_gadget_set_selfpowered(gadget);
- if (gadget->is_otg) {
+ if (gadget_is_otg(gadget)) {
gs_otg_descriptor.bmAttributes |= USB_OTG_HNP,
gs_bulk_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
gs_acm_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
- gs_device = dev = kmalloc(sizeof(struct gs_dev), GFP_KERNEL);
+ gs_device = dev = kzalloc(sizeof(struct gs_dev), GFP_KERNEL);
if (dev == NULL)
return -ENOMEM;
@@ -1435,7 +1419,6 @@ static int __init gs_bind(struct usb_gadget *gadget)
init_utsname()->sysname, init_utsname()->release,
gadget->name);
- memset(dev, 0, sizeof(struct gs_dev));
dev->dev_gadget = gadget;
spin_lock_init(&dev->dev_lock);
INIT_LIST_HEAD(&dev->dev_req_list);
@@ -1487,6 +1470,12 @@ static void /* __init_or_exit */ gs_unbind(struct usb_gadget *gadget)
dev->dev_ctrl_req = NULL;
}
gs_free_ports(dev);
+ if (dev->dev_notify_ep)
+ usb_ep_disable(dev->dev_notify_ep);
+ if (dev->dev_in_ep)
+ usb_ep_disable(dev->dev_in_ep);
+ if (dev->dev_out_ep)
+ usb_ep_disable(dev->dev_out_ep);
kfree(dev);
set_gadget_data(gadget, NULL);
}
@@ -1570,9 +1559,8 @@ static int gs_setup_standard(struct usb_gadget *gadget,
memcpy(req->buf, &gs_device_desc, ret);
break;
-#ifdef CONFIG_USB_GADGET_DUALSPEED
case USB_DT_DEVICE_QUALIFIER:
- if (!gadget->is_dualspeed)
+ if (!gadget_is_dualspeed(gadget))
break;
ret = min(wLength,
(u16)sizeof(struct usb_qualifier_descriptor));
@@ -1580,14 +1568,13 @@ static int gs_setup_standard(struct usb_gadget *gadget,
break;
case USB_DT_OTHER_SPEED_CONFIG:
- if (!gadget->is_dualspeed)
+ if (!gadget_is_dualspeed(gadget))
break;
/* fall through */
-#endif /* CONFIG_USB_GADGET_DUALSPEED */
case USB_DT_CONFIG:
- ret = gs_build_config_buf(req->buf, gadget->speed,
+ ret = gs_build_config_buf(req->buf, gadget,
wValue >> 8, wValue & 0xff,
- gadget->is_otg);
+ gadget_is_otg(gadget));
if (ret >= 0)
ret = min(wLength, (u16)ret);
break;
@@ -1691,14 +1678,12 @@ static int gs_setup_class(struct usb_gadget *gadget,
switch (ctrl->bRequest) {
case USB_CDC_REQ_SET_LINE_CODING:
- ret = min(wLength,
- (u16)sizeof(struct usb_cdc_line_coding));
- if (port) {
- spin_lock(&port->port_lock);
- memcpy(&port->port_line_coding, req->buf, ret);
- spin_unlock(&port->port_lock);
- }
- ret = 0;
+ /* FIXME Submit req to read the data; have its completion
+ * handler copy that data to port->port_line_coding (iff
+ * it's valid) and maybe pass it on. Until then, fail.
+ */
+ printk(KERN_WARNING "gs_setup: set_line_coding "
+ "unuspported\n");
break;
case USB_CDC_REQ_GET_LINE_CODING:
@@ -1713,11 +1698,18 @@ static int gs_setup_class(struct usb_gadget *gadget,
break;
case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
- ret = 0;
+ /* FIXME Submit req to read the data; have its completion
+ * handler use that to set the state (iff it's valid) and
+ * maybe pass it on. Until then, fail.
+ */
+ printk(KERN_WARNING "gs_setup: set_control_line_state "
+ "unuspported\n");
break;
default:
- printk(KERN_ERR "gs_setup: unknown class request, type=%02x, request=%02x, value=%04x, index=%04x, length=%d\n",
+ printk(KERN_ERR "gs_setup: unknown class request, "
+ "type=%02x, request=%02x, value=%04x, "
+ "index=%04x, length=%d\n",
ctrl->bRequestType, ctrl->bRequest,
wValue, wIndex, wLength);
break;
@@ -1822,8 +1814,7 @@ static int gs_set_config(struct gs_dev *dev, unsigned config)
if (EP_NOTIFY_NAME
&& strcmp(ep->name, EP_NOTIFY_NAME) == 0) {
- ep_desc = GS_SPEED_SELECT(
- gadget->speed == USB_SPEED_HIGH,
+ ep_desc = choose_ep_desc(gadget,
&gs_highspeed_notify_desc,
&gs_fullspeed_notify_desc);
ret = usb_ep_enable(ep,ep_desc);
@@ -1839,9 +1830,8 @@ static int gs_set_config(struct gs_dev *dev, unsigned config)
}
else if (strcmp(ep->name, EP_IN_NAME) == 0) {
- ep_desc = GS_SPEED_SELECT(
- gadget->speed == USB_SPEED_HIGH,
- &gs_highspeed_in_desc,
+ ep_desc = choose_ep_desc(gadget,
+ &gs_highspeed_in_desc,
&gs_fullspeed_in_desc);
ret = usb_ep_enable(ep,ep_desc);
if (ret == 0) {
@@ -1856,8 +1846,7 @@ static int gs_set_config(struct gs_dev *dev, unsigned config)
}
else if (strcmp(ep->name, EP_OUT_NAME) == 0) {
- ep_desc = GS_SPEED_SELECT(
- gadget->speed == USB_SPEED_HIGH,
+ ep_desc = choose_ep_desc(gadget,
&gs_highspeed_out_desc,
&gs_fullspeed_out_desc);
ret = usb_ep_enable(ep,ep_desc);
@@ -1976,11 +1965,11 @@ static void gs_reset_config(struct gs_dev *dev)
* Builds the config descriptors in the given buffer and returns the
* length, or a negative error number.
*/
-static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed,
+static int gs_build_config_buf(u8 *buf, struct usb_gadget *g,
u8 type, unsigned int index, int is_otg)
{
int len;
- int high_speed;
+ int high_speed = 0;
const struct usb_config_descriptor *config_desc;
const struct usb_descriptor_header **function;
@@ -1988,20 +1977,22 @@ static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed,
return -EINVAL;
/* other speed switches high and full speed */
- high_speed = (speed == USB_SPEED_HIGH);
- if (type == USB_DT_OTHER_SPEED_CONFIG)
- high_speed = !high_speed;
+ if (gadget_is_dualspeed(g)) {
+ high_speed = (g->speed == USB_SPEED_HIGH);
+ if (type == USB_DT_OTHER_SPEED_CONFIG)
+ high_speed = !high_speed;
+ }
if (use_acm) {
config_desc = &gs_acm_config_desc;
- function = GS_SPEED_SELECT(high_speed,
- gs_acm_highspeed_function,
- gs_acm_fullspeed_function);
+ function = high_speed
+ ? gs_acm_highspeed_function
+ : gs_acm_fullspeed_function;
} else {
config_desc = &gs_bulk_config_desc;
- function = GS_SPEED_SELECT(high_speed,
- gs_bulk_highspeed_function,
- gs_bulk_fullspeed_function);
+ function = high_speed
+ ? gs_bulk_highspeed_function
+ : gs_bulk_fullspeed_function;
}
/* for now, don't advertise srp-only devices */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 18:24:23 +0100