1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
#include "headers.h"
static void prepare_low_power_mode(struct urb *urb,
struct bcm_interface_adapter *interface,
struct bcm_mini_adapter *ps_adapter,
struct bcm_mini_adapter *ad,
struct bcm_link_request *p_control_msg,
bool *b_power_down_msg)
{
if (((p_control_msg->szData[0] == GO_TO_IDLE_MODE_PAYLOAD) &&
(p_control_msg->szData[1] == TARGET_CAN_GO_TO_IDLE_MODE))) {
*b_power_down_msg = TRUE;
/*
* This covers the bus err while Idle Request msg
* sent down.
*/
if (urb->status != STATUS_SUCCESS) {
ps_adapter->bPreparingForLowPowerMode = false;
BCM_DEBUG_PRINT(ad, DBG_TYPE_TX, NEXT_SEND,
DBG_LVL_ALL,
"Idle Mode Request msg failed to reach to Modem");
/* Signalling the cntrl pkt path in Ioctl */
wake_up(&ps_adapter->lowpower_mode_wait_queue);
StartInterruptUrb(interface);
return;
}
if (ps_adapter->bDoSuspend == false) {
ps_adapter->IdleMode = TRUE;
/* since going in Idle mode completed hence making this var false */
ps_adapter->bPreparingForLowPowerMode = false;
BCM_DEBUG_PRINT(ad, DBG_TYPE_TX, NEXT_SEND,
DBG_LVL_ALL,
"Host Entered in Idle Mode State...");
/* Signalling the cntrl pkt path in Ioctl*/
wake_up(&ps_adapter->lowpower_mode_wait_queue);
}
} else if ((p_control_msg->Leader.Status == LINK_UP_CONTROL_REQ) &&
(p_control_msg->szData[0] == LINK_UP_ACK) &&
(p_control_msg->szData[1] == LINK_SHUTDOWN_REQ_FROM_FIRMWARE) &&
(p_control_msg->szData[2] == SHUTDOWN_ACK_FROM_DRIVER)) {
/*
* This covers the bus err while shutdown Request
* msg sent down.
*/
if (urb->status != STATUS_SUCCESS) {
ps_adapter->bPreparingForLowPowerMode = false;
BCM_DEBUG_PRINT(ad, DBG_TYPE_TX, NEXT_SEND,
DBG_LVL_ALL,
"Shutdown Request Msg failed to reach to Modem");
/* Signalling the cntrl pkt path in Ioctl */
wake_up(&ps_adapter->lowpower_mode_wait_queue);
StartInterruptUrb(interface);
return;
}
*b_power_down_msg = TRUE;
if (ps_adapter->bDoSuspend == false) {
ps_adapter->bShutStatus = TRUE;
/*
* since going in shutdown mode completed hence
* making this var false
*/
ps_adapter->bPreparingForLowPowerMode = false;
BCM_DEBUG_PRINT(ad, DBG_TYPE_TX, NEXT_SEND,
DBG_LVL_ALL,
"Host Entered in shutdown Mode State...");
/* Signalling the cntrl pkt path in Ioctl */
wake_up(&ps_adapter->lowpower_mode_wait_queue);
}
}
if (ps_adapter->bDoSuspend && *b_power_down_msg) {
/* issuing bus suspend request */
BCM_DEBUG_PRINT(ad, DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,
"Issuing the Bus suspend request to USB stack");
interface->bPreparingForBusSuspend = TRUE;
schedule_work(&interface->usbSuspendWork);
}
}
/*this is transmit call-back(BULK OUT)*/
static void write_bulk_callback(struct urb *urb/*, struct pt_regs *regs*/)
{
struct bcm_usb_tcb *pTcb = (struct bcm_usb_tcb *)urb->context;
struct bcm_interface_adapter *psIntfAdapter = pTcb->psIntfAdapter;
struct bcm_link_request *pControlMsg =
(struct bcm_link_request *)urb->transfer_buffer;
struct bcm_mini_adapter *psAdapter = psIntfAdapter->psAdapter;
bool bpowerDownMsg = false;
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(gblpnetdev);
if (unlikely(netif_msg_tx_done(Adapter)))
pr_info(PFX "%s: transmit status %d\n", Adapter->dev->name,
urb->status);
if (urb->status != STATUS_SUCCESS) {
if (urb->status == -EPIPE) {
psIntfAdapter->psAdapter->bEndPointHalted = TRUE;
wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
} else {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_TX, NEXT_SEND,
DBG_LVL_ALL,
"Tx URB has got cancelled. status :%d",
urb->status);
}
}
pTcb->bUsed = false;
atomic_dec(&psIntfAdapter->uNumTcbUsed);
if (TRUE == psAdapter->bPreparingForLowPowerMode) {
prepare_low_power_mode(urb, psIntfAdapter, psAdapter, Adapter,
pControlMsg, &bpowerDownMsg);
}
usb_free_coherent(urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma);
}
static struct bcm_usb_tcb *GetBulkOutTcb(struct bcm_interface_adapter *psIntfAdapter)
{
struct bcm_usb_tcb *pTcb = NULL;
UINT index = 0;
if ((atomic_read(&psIntfAdapter->uNumTcbUsed) < MAXIMUM_USB_TCB) &&
(psIntfAdapter->psAdapter->StopAllXaction == false)) {
index = atomic_read(&psIntfAdapter->uCurrTcb);
pTcb = &psIntfAdapter->asUsbTcb[index];
pTcb->bUsed = TRUE;
pTcb->psIntfAdapter = psIntfAdapter;
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_TX,
NEXT_SEND, DBG_LVL_ALL,
"Got Tx desc %d used %d",
index,
atomic_read(&psIntfAdapter->uNumTcbUsed));
index = (index + 1) % MAXIMUM_USB_TCB;
atomic_set(&psIntfAdapter->uCurrTcb, index);
atomic_inc(&psIntfAdapter->uNumTcbUsed);
}
return pTcb;
}
static int TransmitTcb(struct bcm_interface_adapter *psIntfAdapter,
struct bcm_usb_tcb *pTcb, PVOID data, int len)
{
struct urb *urb = pTcb->urb;
int retval = 0;
urb->transfer_buffer = usb_alloc_coherent(psIntfAdapter->udev, len,
GFP_ATOMIC, &urb->transfer_dma);
if (!urb->transfer_buffer) {
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_PRINTK, 0, 0,
"Error allocating memory\n");
return -ENOMEM;
}
memcpy(urb->transfer_buffer, data, len);
urb->transfer_buffer_length = len;
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_TX, NEXT_SEND,
DBG_LVL_ALL, "Sending Bulk out packet\n");
/* For T3B,INT OUT end point will be used as bulk out end point */
if ((psIntfAdapter->psAdapter->chip_id == T3B) &&
(psIntfAdapter->bHighSpeedDevice == TRUE)) {
usb_fill_int_urb(urb, psIntfAdapter->udev,
psIntfAdapter->sBulkOut.bulk_out_pipe,
urb->transfer_buffer, len, write_bulk_callback, pTcb,
psIntfAdapter->sBulkOut.int_out_interval);
} else {
usb_fill_bulk_urb(urb, psIntfAdapter->udev,
psIntfAdapter->sBulkOut.bulk_out_pipe,
urb->transfer_buffer, len, write_bulk_callback, pTcb);
}
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; /* For DMA transfer */
if (false == psIntfAdapter->psAdapter->device_removed &&
false == psIntfAdapter->psAdapter->bEndPointHalted &&
false == psIntfAdapter->bSuspended &&
false == psIntfAdapter->bPreparingForBusSuspend) {
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval) {
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_TX,
NEXT_SEND, DBG_LVL_ALL,
"failed submitting write urb, error %d",
retval);
if (retval == -EPIPE) {
psIntfAdapter->psAdapter->bEndPointHalted = TRUE;
wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
}
}
}
return retval;
}
int InterfaceTransmitPacket(PVOID arg, PVOID data, UINT len)
{
struct bcm_usb_tcb *pTcb = NULL;
struct bcm_interface_adapter *psIntfAdapter = arg;
pTcb = GetBulkOutTcb(psIntfAdapter);
if (pTcb == NULL) {
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_PRINTK, 0, 0,
"No URB to transmit packet, dropping packet");
return -EFAULT;
}
return TransmitTcb(psIntfAdapter, pTcb, data, len);
}
|
