diff options
author | Alex Villacís Lasso <a_villacis@palosanto.com> | 2007-08-28 18:57:50 -0400 |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 19:48:38 -0400 |
commit | 4a1d7c25cb438f96b700ac26dc5aa0a38a6d86ea (patch) | |
tree | 20f8eb0f9fcef2051c96f1d9ce02eba1349f119c /drivers | |
parent | bcb5e0eef35059af372a7bd3fc68915278d74bc0 (diff) |
[IrDA]: Kingsun Dazzle IrDA USB driver
This dongle does not follow the usb-irda specification, so it needs its own
special driver. Just like the Kingsun/Donshine dongle, it exposes two
interrupt endpoints. Reception is performed through direct reads from the
input endpoint. Transmission requires splitting the IrDA frames into 8-byte
segments, in which the first byte encodes how many of the remaining 7 bytes
are used as data. Speed change is made with a control URB just like the one
in cypress_m8, and it seems to support up to 115200 bps.
On plugin, this dongle reports vendor and device IDs: 0x07d0:0x4100
Signed-off-by: Alex Villacís Lasso <a_villacis@palosanto.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/irda/Kconfig | 12 | ||||
-rw-r--r-- | drivers/net/irda/Makefile | 1 | ||||
-rw-r--r-- | drivers/net/irda/ksdazzle-sir.c | 823 |
3 files changed, 836 insertions, 0 deletions
diff --git a/drivers/net/irda/Kconfig b/drivers/net/irda/Kconfig index 2098d0af8ff5..cfa7b8835d3d 100644 --- a/drivers/net/irda/Kconfig +++ b/drivers/net/irda/Kconfig | |||
@@ -162,7 +162,19 @@ config EP7211_DONGLE | |||
162 | Say Y here if you want to build support for the Cirrus logic | 162 | Say Y here if you want to build support for the Cirrus logic |
163 | EP7211 chipset's infrared module. | 163 | EP7211 chipset's infrared module. |
164 | 164 | ||
165 | config KSDAZZLE_DONGLE | ||
166 | tristate "KingSun Dazzle IrDA-USB dongle (EXPERIMENTAL)" | ||
167 | depends on IRDA && USB && EXPERIMENTAL | ||
168 | help | ||
169 | Say Y or M here if you want to build support for the KingSun Dazzle | ||
170 | IrDA-USB bridge device driver. | ||
171 | |||
172 | This USB bridge does not conform to the IrDA-USB device class | ||
173 | specification, and therefore needs its own specific driver. This | ||
174 | dongle supports SIR speeds only (9600 through 115200 bps). | ||
165 | 175 | ||
176 | To compile it as a module, choose M here: the module will be called | ||
177 | ksdazzle-sir. | ||
166 | 178 | ||
167 | comment "Old SIR device drivers" | 179 | comment "Old SIR device drivers" |
168 | 180 | ||
diff --git a/drivers/net/irda/Makefile b/drivers/net/irda/Makefile index 2808ef5c7b79..e19da3b919a2 100644 --- a/drivers/net/irda/Makefile +++ b/drivers/net/irda/Makefile | |||
@@ -47,6 +47,7 @@ obj-$(CONFIG_MA600_DONGLE) += ma600-sir.o | |||
47 | obj-$(CONFIG_TOIM3232_DONGLE) += toim3232-sir.o | 47 | obj-$(CONFIG_TOIM3232_DONGLE) += toim3232-sir.o |
48 | obj-$(CONFIG_EP7211_DONGLE) += ep7211-sir.o | 48 | obj-$(CONFIG_EP7211_DONGLE) += ep7211-sir.o |
49 | obj-$(CONFIG_KINGSUN_DONGLE) += kingsun-sir.o | 49 | obj-$(CONFIG_KINGSUN_DONGLE) += kingsun-sir.o |
50 | obj-$(CONFIG_KSDAZZLE_DONGLE) += ksdazzle-sir.o | ||
50 | 51 | ||
51 | # The SIR helper module | 52 | # The SIR helper module |
52 | sir-dev-objs := sir_dev.o sir_dongle.o | 53 | sir-dev-objs := sir_dev.o sir_dongle.o |
diff --git a/drivers/net/irda/ksdazzle-sir.c b/drivers/net/irda/ksdazzle-sir.c new file mode 100644 index 000000000000..12b0e7a15bef --- /dev/null +++ b/drivers/net/irda/ksdazzle-sir.c | |||
@@ -0,0 +1,823 @@ | |||
1 | /***************************************************************************** | ||
2 | * | ||
3 | * Filename: ksdazzle.c | ||
4 | * Version: 0.1.1 | ||
5 | * Description: Irda KingSun Dazzle USB Dongle | ||
6 | * Status: Experimental | ||
7 | * Author: Alex Villacís Lasso <a_villacis@palosanto.com> | ||
8 | * | ||
9 | * Based on stir4200, mcs7780, kingsun-sir drivers. | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or modify | ||
12 | * it under the terms of the GNU General Public License as published by | ||
13 | * the Free Software Foundation; either version 2 of the License. | ||
14 | * | ||
15 | * This program is distributed in the hope that it will be useful, | ||
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
18 | * GNU General Public License for more details. | ||
19 | * | ||
20 | * You should have received a copy of the GNU General Public License | ||
21 | * along with this program; if not, write to the Free Software | ||
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
23 | * | ||
24 | *****************************************************************************/ | ||
25 | |||
26 | /* | ||
27 | * Following is my most current (2007-07-26) understanding of how the Kingsun | ||
28 | * 07D0:4100 dongle (sometimes known as the MA-660) is supposed to work. This | ||
29 | * information was deduced by examining the USB traffic captured with USBSnoopy | ||
30 | * from the WinXP driver. Feel free to update here as more of the dongle is | ||
31 | * known. | ||
32 | * | ||
33 | * General: This dongle exposes one interface with two interrupt endpoints, one | ||
34 | * IN and one OUT. In this regard, it is similar to what the Kingsun/Donshine | ||
35 | * dongle (07c0:4200) exposes. Traffic is raw and needs to be wrapped and | ||
36 | * unwrapped manually as in stir4200, kingsun-sir, and ks959-sir. | ||
37 | * | ||
38 | * Transmission: To transmit an IrDA frame, it is necessary to wrap it, then | ||
39 | * split it into multiple segments of up to 7 bytes each, and transmit each in | ||
40 | * sequence. It seems that sending a single big block (like kingsun-sir does) | ||
41 | * won't work with this dongle. Each segment needs to be prefixed with a value | ||
42 | * equal to (unsigned char)0xF8 + <number of bytes in segment>, inside a payload | ||
43 | * of exactly 8 bytes. For example, a segment of 1 byte gets prefixed by 0xF9, | ||
44 | * and one of 7 bytes gets prefixed by 0xFF. The bytes at the end of the | ||
45 | * payload, not considered by the prefix, are ignored (set to 0 by this | ||
46 | * implementation). | ||
47 | * | ||
48 | * Reception: To receive data, the driver must poll the dongle regularly (like | ||
49 | * kingsun-sir.c) with interrupt URBs. If data is available, it will be returned | ||
50 | * in payloads from 0 to 8 bytes long. When concatenated, these payloads form | ||
51 | * a raw IrDA stream that needs to be unwrapped as in stir4200 and kingsun-sir | ||
52 | * | ||
53 | * Speed change: To change the speed of the dongle, the driver prepares a | ||
54 | * control URB with the following as a setup packet: | ||
55 | * bRequestType USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE | ||
56 | * bRequest 0x09 | ||
57 | * wValue 0x0200 | ||
58 | * wIndex 0x0001 | ||
59 | * wLength 0x0008 (length of the payload) | ||
60 | * The payload is a 8-byte record, apparently identical to the one used in | ||
61 | * drivers/usb/serial/cypress_m8.c to change speed: | ||
62 | * __u32 baudSpeed; | ||
63 | * unsigned int dataBits : 2; // 0 - 5 bits 3 - 8 bits | ||
64 | * unsigned int : 1; | ||
65 | * unsigned int stopBits : 1; | ||
66 | * unsigned int parityEnable : 1; | ||
67 | * unsigned int parityType : 1; | ||
68 | * unsigned int : 1; | ||
69 | * unsigned int reset : 1; | ||
70 | * unsigned char reserved[3]; // set to 0 | ||
71 | * | ||
72 | * For now only SIR speeds have been observed with this dongle. Therefore, | ||
73 | * nothing is known on what changes (if any) must be done to frame wrapping / | ||
74 | * unwrapping for higher than SIR speeds. This driver assumes no change is | ||
75 | * necessary and announces support for all the way to 115200 bps. | ||
76 | */ | ||
77 | |||
78 | #include <linux/module.h> | ||
79 | #include <linux/moduleparam.h> | ||
80 | #include <linux/kernel.h> | ||
81 | #include <linux/types.h> | ||
82 | #include <linux/errno.h> | ||
83 | #include <linux/init.h> | ||
84 | #include <linux/slab.h> | ||
85 | #include <linux/module.h> | ||
86 | #include <linux/kref.h> | ||
87 | #include <linux/usb.h> | ||
88 | #include <linux/device.h> | ||
89 | #include <linux/crc32.h> | ||
90 | |||
91 | #include <asm/unaligned.h> | ||
92 | #include <asm/byteorder.h> | ||
93 | #include <asm/uaccess.h> | ||
94 | |||
95 | #include <net/irda/irda.h> | ||
96 | #include <net/irda/wrapper.h> | ||
97 | #include <net/irda/crc.h> | ||
98 | |||
99 | #define KSDAZZLE_VENDOR_ID 0x07d0 | ||
100 | #define KSDAZZLE_PRODUCT_ID 0x4100 | ||
101 | |||
102 | /* These are the currently known USB ids */ | ||
103 | static struct usb_device_id dongles[] = { | ||
104 | /* KingSun Co,Ltd IrDA/USB Bridge */ | ||
105 | {USB_DEVICE(KSDAZZLE_VENDOR_ID, KSDAZZLE_PRODUCT_ID)}, | ||
106 | {} | ||
107 | }; | ||
108 | |||
109 | MODULE_DEVICE_TABLE(usb, dongles); | ||
110 | |||
111 | #define KINGSUN_MTT 0x07 | ||
112 | #define KINGSUN_REQ_RECV 0x01 | ||
113 | #define KINGSUN_REQ_SEND 0x09 | ||
114 | |||
115 | #define KINGSUN_SND_FIFO_SIZE 2048 /* Max packet we can send */ | ||
116 | |||
117 | struct ksdazzle_speedparams { | ||
118 | __le32 baudrate; /* baud rate, little endian */ | ||
119 | __u8 flags; | ||
120 | __u8 reserved[3]; | ||
121 | } __attribute__ ((packed)); | ||
122 | |||
123 | #define KS_DATA_5_BITS 0x00 | ||
124 | #define KS_DATA_6_BITS 0x01 | ||
125 | #define KS_DATA_7_BITS 0x02 | ||
126 | #define KS_DATA_8_BITS 0x03 | ||
127 | |||
128 | #define KS_STOP_BITS_1 0x00 | ||
129 | #define KS_STOP_BITS_2 0x08 | ||
130 | |||
131 | #define KS_PAR_DISABLE 0x00 | ||
132 | #define KS_PAR_EVEN 0x10 | ||
133 | #define KS_PAR_ODD 0x30 | ||
134 | #define KS_RESET 0x80 | ||
135 | |||
136 | #define KINGSUN_EP_IN 0 | ||
137 | #define KINGSUN_EP_OUT 1 | ||
138 | |||
139 | struct ksdazzle_cb { | ||
140 | struct usb_device *usbdev; /* init: probe_irda */ | ||
141 | struct net_device *netdev; /* network layer */ | ||
142 | struct irlap_cb *irlap; /* The link layer we are binded to */ | ||
143 | struct net_device_stats stats; /* network statistics */ | ||
144 | struct qos_info qos; | ||
145 | |||
146 | struct urb *tx_urb; | ||
147 | __u8 *tx_buf_clear; | ||
148 | unsigned int tx_buf_clear_used; | ||
149 | unsigned int tx_buf_clear_sent; | ||
150 | __u8 tx_payload[8]; | ||
151 | |||
152 | struct urb *rx_urb; | ||
153 | __u8 rx_payload[8]; | ||
154 | iobuff_t rx_unwrap_buff; | ||
155 | |||
156 | struct usb_ctrlrequest *speed_setuprequest; | ||
157 | struct urb *speed_urb; | ||
158 | struct ksdazzle_speedparams speedparams; | ||
159 | unsigned int new_speed; | ||
160 | |||
161 | __u8 ep_in; | ||
162 | __u8 ep_out; | ||
163 | |||
164 | spinlock_t lock; | ||
165 | int receiving; | ||
166 | }; | ||
167 | |||
168 | /* Callback transmission routine */ | ||
169 | static void ksdazzle_speed_irq(struct urb *urb) | ||
170 | { | ||
171 | /* unlink, shutdown, unplug, other nasties */ | ||
172 | if (urb->status != 0) { | ||
173 | err("ksdazzle_speed_irq: urb asynchronously failed - %d", | ||
174 | urb->status); | ||
175 | } | ||
176 | } | ||
177 | |||
178 | /* Send a control request to change speed of the dongle */ | ||
179 | static int ksdazzle_change_speed(struct ksdazzle_cb *kingsun, unsigned speed) | ||
180 | { | ||
181 | static unsigned int supported_speeds[] = { 2400, 9600, 19200, 38400, | ||
182 | 57600, 115200, 576000, 1152000, 4000000, 0 | ||
183 | }; | ||
184 | int err; | ||
185 | unsigned int i; | ||
186 | |||
187 | if (kingsun->speed_setuprequest == NULL || kingsun->speed_urb == NULL) | ||
188 | return -ENOMEM; | ||
189 | |||
190 | /* Check that requested speed is among the supported ones */ | ||
191 | for (i = 0; supported_speeds[i] && supported_speeds[i] != speed; i++) ; | ||
192 | if (supported_speeds[i] == 0) | ||
193 | return -EOPNOTSUPP; | ||
194 | |||
195 | memset(&(kingsun->speedparams), 0, sizeof(struct ksdazzle_speedparams)); | ||
196 | kingsun->speedparams.baudrate = cpu_to_le32(speed); | ||
197 | kingsun->speedparams.flags = KS_DATA_8_BITS; | ||
198 | |||
199 | /* speed_setuprequest pre-filled in ksdazzle_probe */ | ||
200 | usb_fill_control_urb(kingsun->speed_urb, kingsun->usbdev, | ||
201 | usb_sndctrlpipe(kingsun->usbdev, 0), | ||
202 | (unsigned char *)kingsun->speed_setuprequest, | ||
203 | &(kingsun->speedparams), | ||
204 | sizeof(struct ksdazzle_speedparams), | ||
205 | ksdazzle_speed_irq, kingsun); | ||
206 | kingsun->speed_urb->status = 0; | ||
207 | err = usb_submit_urb(kingsun->speed_urb, GFP_ATOMIC); | ||
208 | |||
209 | return err; | ||
210 | } | ||
211 | |||
212 | /* Submit one fragment of an IrDA frame to the dongle */ | ||
213 | static void ksdazzle_send_irq(struct urb *urb); | ||
214 | static int ksdazzle_submit_tx_fragment(struct ksdazzle_cb *kingsun) | ||
215 | { | ||
216 | unsigned int wraplen; | ||
217 | int ret; | ||
218 | |||
219 | /* We can send at most 7 bytes of payload at a time */ | ||
220 | wraplen = 7; | ||
221 | if (wraplen > kingsun->tx_buf_clear_used) | ||
222 | wraplen = kingsun->tx_buf_clear_used; | ||
223 | |||
224 | /* Prepare payload prefix with used length */ | ||
225 | memset(kingsun->tx_payload, 0, 8); | ||
226 | kingsun->tx_payload[0] = (unsigned char)0xf8 + wraplen; | ||
227 | memcpy(kingsun->tx_payload + 1, kingsun->tx_buf_clear, wraplen); | ||
228 | |||
229 | usb_fill_int_urb(kingsun->tx_urb, kingsun->usbdev, | ||
230 | usb_sndintpipe(kingsun->usbdev, kingsun->ep_out), | ||
231 | kingsun->tx_payload, 8, ksdazzle_send_irq, kingsun, 1); | ||
232 | kingsun->tx_urb->status = 0; | ||
233 | ret = usb_submit_urb(kingsun->tx_urb, GFP_ATOMIC); | ||
234 | |||
235 | /* Remember how much data was sent, in order to update at callback */ | ||
236 | kingsun->tx_buf_clear_sent = (ret == 0) ? wraplen : 0; | ||
237 | return ret; | ||
238 | } | ||
239 | |||
240 | /* Callback transmission routine */ | ||
241 | static void ksdazzle_send_irq(struct urb *urb) | ||
242 | { | ||
243 | struct ksdazzle_cb *kingsun = urb->context; | ||
244 | struct net_device *netdev = kingsun->netdev; | ||
245 | int ret = 0; | ||
246 | |||
247 | /* in process of stopping, just drop data */ | ||
248 | if (!netif_running(kingsun->netdev)) { | ||
249 | err("ksdazzle_send_irq: Network not running!"); | ||
250 | return; | ||
251 | } | ||
252 | |||
253 | /* unlink, shutdown, unplug, other nasties */ | ||
254 | if (urb->status != 0) { | ||
255 | err("ksdazzle_send_irq: urb asynchronously failed - %d", | ||
256 | urb->status); | ||
257 | return; | ||
258 | } | ||
259 | |||
260 | if (kingsun->tx_buf_clear_used > 0) { | ||
261 | /* Update data remaining to be sent */ | ||
262 | if (kingsun->tx_buf_clear_sent < kingsun->tx_buf_clear_used) { | ||
263 | memmove(kingsun->tx_buf_clear, | ||
264 | kingsun->tx_buf_clear + | ||
265 | kingsun->tx_buf_clear_sent, | ||
266 | kingsun->tx_buf_clear_used - | ||
267 | kingsun->tx_buf_clear_sent); | ||
268 | } | ||
269 | kingsun->tx_buf_clear_used -= kingsun->tx_buf_clear_sent; | ||
270 | kingsun->tx_buf_clear_sent = 0; | ||
271 | |||
272 | if (kingsun->tx_buf_clear_used > 0) { | ||
273 | /* There is more data to be sent */ | ||
274 | if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) { | ||
275 | err("ksdazzle_send_irq: failed tx_urb submit: %d", ret); | ||
276 | switch (ret) { | ||
277 | case -ENODEV: | ||
278 | case -EPIPE: | ||
279 | break; | ||
280 | default: | ||
281 | kingsun->stats.tx_errors++; | ||
282 | netif_start_queue(netdev); | ||
283 | } | ||
284 | } | ||
285 | } else { | ||
286 | /* All data sent, send next speed && wake network queue */ | ||
287 | if (kingsun->new_speed != -1 && | ||
288 | cpu_to_le32(kingsun->new_speed) != | ||
289 | kingsun->speedparams.baudrate) | ||
290 | ksdazzle_change_speed(kingsun, | ||
291 | kingsun->new_speed); | ||
292 | |||
293 | netif_wake_queue(netdev); | ||
294 | } | ||
295 | } | ||
296 | } | ||
297 | |||
298 | /* | ||
299 | * Called from net/core when new frame is available. | ||
300 | */ | ||
301 | static int ksdazzle_hard_xmit(struct sk_buff *skb, struct net_device *netdev) | ||
302 | { | ||
303 | struct ksdazzle_cb *kingsun; | ||
304 | unsigned int wraplen; | ||
305 | int ret = 0; | ||
306 | |||
307 | if (skb == NULL || netdev == NULL) | ||
308 | return -EINVAL; | ||
309 | |||
310 | netif_stop_queue(netdev); | ||
311 | |||
312 | /* the IRDA wrapping routines don't deal with non linear skb */ | ||
313 | SKB_LINEAR_ASSERT(skb); | ||
314 | |||
315 | kingsun = netdev_priv(netdev); | ||
316 | |||
317 | spin_lock(&kingsun->lock); | ||
318 | kingsun->new_speed = irda_get_next_speed(skb); | ||
319 | |||
320 | /* Append data to the end of whatever data remains to be transmitted */ | ||
321 | wraplen = | ||
322 | async_wrap_skb(skb, kingsun->tx_buf_clear, KINGSUN_SND_FIFO_SIZE); | ||
323 | kingsun->tx_buf_clear_used = wraplen; | ||
324 | |||
325 | if ((ret = ksdazzle_submit_tx_fragment(kingsun)) != 0) { | ||
326 | err("ksdazzle_hard_xmit: failed tx_urb submit: %d", ret); | ||
327 | switch (ret) { | ||
328 | case -ENODEV: | ||
329 | case -EPIPE: | ||
330 | break; | ||
331 | default: | ||
332 | kingsun->stats.tx_errors++; | ||
333 | netif_start_queue(netdev); | ||
334 | } | ||
335 | } else { | ||
336 | kingsun->stats.tx_packets++; | ||
337 | kingsun->stats.tx_bytes += skb->len; | ||
338 | |||
339 | } | ||
340 | |||
341 | dev_kfree_skb(skb); | ||
342 | spin_unlock(&kingsun->lock); | ||
343 | |||
344 | return ret; | ||
345 | } | ||
346 | |||
347 | /* Receive callback function */ | ||
348 | static void ksdazzle_rcv_irq(struct urb *urb) | ||
349 | { | ||
350 | struct ksdazzle_cb *kingsun = urb->context; | ||
351 | |||
352 | /* in process of stopping, just drop data */ | ||
353 | if (!netif_running(kingsun->netdev)) { | ||
354 | kingsun->receiving = 0; | ||
355 | return; | ||
356 | } | ||
357 | |||
358 | /* unlink, shutdown, unplug, other nasties */ | ||
359 | if (urb->status != 0) { | ||
360 | err("ksdazzle_rcv_irq: urb asynchronously failed - %d", | ||
361 | urb->status); | ||
362 | kingsun->receiving = 0; | ||
363 | return; | ||
364 | } | ||
365 | |||
366 | if (urb->actual_length > 0) { | ||
367 | __u8 *bytes = urb->transfer_buffer; | ||
368 | unsigned int i; | ||
369 | |||
370 | for (i = 0; i < urb->actual_length; i++) { | ||
371 | async_unwrap_char(kingsun->netdev, &kingsun->stats, | ||
372 | &kingsun->rx_unwrap_buff, bytes[i]); | ||
373 | } | ||
374 | kingsun->netdev->last_rx = jiffies; | ||
375 | kingsun->receiving = | ||
376 | (kingsun->rx_unwrap_buff.state != OUTSIDE_FRAME) ? 1 : 0; | ||
377 | } | ||
378 | |||
379 | /* This urb has already been filled in ksdazzle_net_open. It is assumed that | ||
380 | urb keeps the pointer to the payload buffer. | ||
381 | */ | ||
382 | urb->status = 0; | ||
383 | usb_submit_urb(urb, GFP_ATOMIC); | ||
384 | } | ||
385 | |||
386 | /* | ||
387 | * Function ksdazzle_net_open (dev) | ||
388 | * | ||
389 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" | ||
390 | */ | ||
391 | static int ksdazzle_net_open(struct net_device *netdev) | ||
392 | { | ||
393 | struct ksdazzle_cb *kingsun = netdev_priv(netdev); | ||
394 | int err = -ENOMEM; | ||
395 | char hwname[16]; | ||
396 | |||
397 | /* At this point, urbs are NULL, and skb is NULL (see ksdazzle_probe) */ | ||
398 | kingsun->receiving = 0; | ||
399 | |||
400 | /* Initialize for SIR to copy data directly into skb. */ | ||
401 | kingsun->rx_unwrap_buff.in_frame = FALSE; | ||
402 | kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; | ||
403 | kingsun->rx_unwrap_buff.truesize = IRDA_SKB_MAX_MTU; | ||
404 | kingsun->rx_unwrap_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | ||
405 | if (!kingsun->rx_unwrap_buff.skb) | ||
406 | goto free_mem; | ||
407 | |||
408 | skb_reserve(kingsun->rx_unwrap_buff.skb, 1); | ||
409 | kingsun->rx_unwrap_buff.head = kingsun->rx_unwrap_buff.skb->data; | ||
410 | |||
411 | kingsun->rx_urb = usb_alloc_urb(0, GFP_KERNEL); | ||
412 | if (!kingsun->rx_urb) | ||
413 | goto free_mem; | ||
414 | |||
415 | kingsun->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | ||
416 | if (!kingsun->tx_urb) | ||
417 | goto free_mem; | ||
418 | |||
419 | kingsun->speed_urb = usb_alloc_urb(0, GFP_KERNEL); | ||
420 | if (!kingsun->speed_urb) | ||
421 | goto free_mem; | ||
422 | |||
423 | /* Initialize speed for dongle */ | ||
424 | kingsun->new_speed = 9600; | ||
425 | err = ksdazzle_change_speed(kingsun, 9600); | ||
426 | if (err < 0) | ||
427 | goto free_mem; | ||
428 | |||
429 | /* | ||
430 | * Now that everything should be initialized properly, | ||
431 | * Open new IrLAP layer instance to take care of us... | ||
432 | */ | ||
433 | sprintf(hwname, "usb#%d", kingsun->usbdev->devnum); | ||
434 | kingsun->irlap = irlap_open(netdev, &kingsun->qos, hwname); | ||
435 | if (!kingsun->irlap) { | ||
436 | err("ksdazzle-sir: irlap_open failed"); | ||
437 | goto free_mem; | ||
438 | } | ||
439 | |||
440 | /* Start reception. */ | ||
441 | usb_fill_int_urb(kingsun->rx_urb, kingsun->usbdev, | ||
442 | usb_rcvintpipe(kingsun->usbdev, kingsun->ep_in), | ||
443 | kingsun->rx_payload, 8, ksdazzle_rcv_irq, kingsun, 1); | ||
444 | kingsun->rx_urb->status = 0; | ||
445 | err = usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | ||
446 | if (err) { | ||
447 | err("ksdazzle-sir: first urb-submit failed: %d", err); | ||
448 | goto close_irlap; | ||
449 | } | ||
450 | |||
451 | netif_start_queue(netdev); | ||
452 | |||
453 | /* Situation at this point: | ||
454 | - all work buffers allocated | ||
455 | - urbs allocated and ready to fill | ||
456 | - max rx packet known (in max_rx) | ||
457 | - unwrap state machine initialized, in state outside of any frame | ||
458 | - receive request in progress | ||
459 | - IrLAP layer started, about to hand over packets to send | ||
460 | */ | ||
461 | |||
462 | return 0; | ||
463 | |||
464 | close_irlap: | ||
465 | irlap_close(kingsun->irlap); | ||
466 | free_mem: | ||
467 | usb_free_urb(kingsun->speed_urb); | ||
468 | kingsun->speed_urb = NULL; | ||
469 | usb_free_urb(kingsun->tx_urb); | ||
470 | kingsun->tx_urb = NULL; | ||
471 | usb_free_urb(kingsun->rx_urb); | ||
472 | kingsun->rx_urb = NULL; | ||
473 | if (kingsun->rx_unwrap_buff.skb) { | ||
474 | kfree_skb(kingsun->rx_unwrap_buff.skb); | ||
475 | kingsun->rx_unwrap_buff.skb = NULL; | ||
476 | kingsun->rx_unwrap_buff.head = NULL; | ||
477 | } | ||
478 | return err; | ||
479 | } | ||
480 | |||
481 | /* | ||
482 | * Function ksdazzle_net_close (dev) | ||
483 | * | ||
484 | * Network device is taken down. Usually this is done by | ||
485 | * "ifconfig irda0 down" | ||
486 | */ | ||
487 | static int ksdazzle_net_close(struct net_device *netdev) | ||
488 | { | ||
489 | struct ksdazzle_cb *kingsun = netdev_priv(netdev); | ||
490 | |||
491 | /* Stop transmit processing */ | ||
492 | netif_stop_queue(netdev); | ||
493 | |||
494 | /* Mop up receive && transmit urb's */ | ||
495 | usb_kill_urb(kingsun->tx_urb); | ||
496 | usb_free_urb(kingsun->tx_urb); | ||
497 | kingsun->tx_urb = NULL; | ||
498 | |||
499 | usb_kill_urb(kingsun->speed_urb); | ||
500 | usb_free_urb(kingsun->speed_urb); | ||
501 | kingsun->speed_urb = NULL; | ||
502 | |||
503 | usb_kill_urb(kingsun->rx_urb); | ||
504 | usb_free_urb(kingsun->rx_urb); | ||
505 | kingsun->rx_urb = NULL; | ||
506 | |||
507 | kfree_skb(kingsun->rx_unwrap_buff.skb); | ||
508 | kingsun->rx_unwrap_buff.skb = NULL; | ||
509 | kingsun->rx_unwrap_buff.head = NULL; | ||
510 | kingsun->rx_unwrap_buff.in_frame = FALSE; | ||
511 | kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; | ||
512 | kingsun->receiving = 0; | ||
513 | |||
514 | /* Stop and remove instance of IrLAP */ | ||
515 | irlap_close(kingsun->irlap); | ||
516 | |||
517 | kingsun->irlap = NULL; | ||
518 | |||
519 | return 0; | ||
520 | } | ||
521 | |||
522 | /* | ||
523 | * IOCTLs : Extra out-of-band network commands... | ||
524 | */ | ||
525 | static int ksdazzle_net_ioctl(struct net_device *netdev, struct ifreq *rq, | ||
526 | int cmd) | ||
527 | { | ||
528 | struct if_irda_req *irq = (struct if_irda_req *)rq; | ||
529 | struct ksdazzle_cb *kingsun = netdev_priv(netdev); | ||
530 | int ret = 0; | ||
531 | |||
532 | switch (cmd) { | ||
533 | case SIOCSBANDWIDTH: /* Set bandwidth */ | ||
534 | if (!capable(CAP_NET_ADMIN)) | ||
535 | return -EPERM; | ||
536 | |||
537 | /* Check if the device is still there */ | ||
538 | if (netif_device_present(kingsun->netdev)) | ||
539 | return ksdazzle_change_speed(kingsun, | ||
540 | irq->ifr_baudrate); | ||
541 | break; | ||
542 | |||
543 | case SIOCSMEDIABUSY: /* Set media busy */ | ||
544 | if (!capable(CAP_NET_ADMIN)) | ||
545 | return -EPERM; | ||
546 | |||
547 | /* Check if the IrDA stack is still there */ | ||
548 | if (netif_running(kingsun->netdev)) | ||
549 | irda_device_set_media_busy(kingsun->netdev, TRUE); | ||
550 | break; | ||
551 | |||
552 | case SIOCGRECEIVING: | ||
553 | /* Only approximately true */ | ||
554 | irq->ifr_receiving = kingsun->receiving; | ||
555 | break; | ||
556 | |||
557 | default: | ||
558 | ret = -EOPNOTSUPP; | ||
559 | } | ||
560 | |||
561 | return ret; | ||
562 | } | ||
563 | |||
564 | /* | ||
565 | * Get device stats (for /proc/net/dev and ifconfig) | ||
566 | */ | ||
567 | static struct net_device_stats *ksdazzle_net_get_stats(struct net_device | ||
568 | *netdev) | ||
569 | { | ||
570 | struct ksdazzle_cb *kingsun = netdev_priv(netdev); | ||
571 | return &kingsun->stats; | ||
572 | } | ||
573 | |||
574 | /* | ||
575 | * This routine is called by the USB subsystem for each new device | ||
576 | * in the system. We need to check if the device is ours, and in | ||
577 | * this case start handling it. | ||
578 | */ | ||
579 | static int ksdazzle_probe(struct usb_interface *intf, | ||
580 | const struct usb_device_id *id) | ||
581 | { | ||
582 | struct usb_host_interface *interface; | ||
583 | struct usb_endpoint_descriptor *endpoint; | ||
584 | |||
585 | struct usb_device *dev = interface_to_usbdev(intf); | ||
586 | struct ksdazzle_cb *kingsun = NULL; | ||
587 | struct net_device *net = NULL; | ||
588 | int ret = -ENOMEM; | ||
589 | int pipe, maxp_in, maxp_out; | ||
590 | __u8 ep_in; | ||
591 | __u8 ep_out; | ||
592 | |||
593 | /* Check that there really are two interrupt endpoints. Check based on the | ||
594 | one in drivers/usb/input/usbmouse.c | ||
595 | */ | ||
596 | interface = intf->cur_altsetting; | ||
597 | if (interface->desc.bNumEndpoints != 2) { | ||
598 | err("ksdazzle: expected 2 endpoints, found %d", | ||
599 | interface->desc.bNumEndpoints); | ||
600 | return -ENODEV; | ||
601 | } | ||
602 | endpoint = &interface->endpoint[KINGSUN_EP_IN].desc; | ||
603 | if (!usb_endpoint_is_int_in(endpoint)) { | ||
604 | err("ksdazzle: endpoint 0 is not interrupt IN"); | ||
605 | return -ENODEV; | ||
606 | } | ||
607 | |||
608 | ep_in = endpoint->bEndpointAddress; | ||
609 | pipe = usb_rcvintpipe(dev, ep_in); | ||
610 | maxp_in = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | ||
611 | if (maxp_in > 255 || maxp_in <= 1) { | ||
612 | err("ksdazzle: endpoint 0 has max packet size %d not in range [2..255]", maxp_in); | ||
613 | return -ENODEV; | ||
614 | } | ||
615 | |||
616 | endpoint = &interface->endpoint[KINGSUN_EP_OUT].desc; | ||
617 | if (!usb_endpoint_is_int_out(endpoint)) { | ||
618 | err("ksdazzle: endpoint 1 is not interrupt OUT"); | ||
619 | return -ENODEV; | ||
620 | } | ||
621 | |||
622 | ep_out = endpoint->bEndpointAddress; | ||
623 | pipe = usb_sndintpipe(dev, ep_out); | ||
624 | maxp_out = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | ||
625 | |||
626 | /* Allocate network device container. */ | ||
627 | net = alloc_irdadev(sizeof(*kingsun)); | ||
628 | if (!net) | ||
629 | goto err_out1; | ||
630 | |||
631 | SET_MODULE_OWNER(net); | ||
632 | SET_NETDEV_DEV(net, &intf->dev); | ||
633 | kingsun = netdev_priv(net); | ||
634 | kingsun->netdev = net; | ||
635 | kingsun->usbdev = dev; | ||
636 | kingsun->ep_in = ep_in; | ||
637 | kingsun->ep_out = ep_out; | ||
638 | kingsun->irlap = NULL; | ||
639 | kingsun->tx_urb = NULL; | ||
640 | kingsun->tx_buf_clear = NULL; | ||
641 | kingsun->tx_buf_clear_used = 0; | ||
642 | kingsun->tx_buf_clear_sent = 0; | ||
643 | |||
644 | kingsun->rx_urb = NULL; | ||
645 | kingsun->rx_unwrap_buff.in_frame = FALSE; | ||
646 | kingsun->rx_unwrap_buff.state = OUTSIDE_FRAME; | ||
647 | kingsun->rx_unwrap_buff.skb = NULL; | ||
648 | kingsun->receiving = 0; | ||
649 | spin_lock_init(&kingsun->lock); | ||
650 | |||
651 | kingsun->speed_setuprequest = NULL; | ||
652 | kingsun->speed_urb = NULL; | ||
653 | kingsun->speedparams.baudrate = 0; | ||
654 | |||
655 | /* Allocate output buffer */ | ||
656 | kingsun->tx_buf_clear = kmalloc(KINGSUN_SND_FIFO_SIZE, GFP_KERNEL); | ||
657 | if (!kingsun->tx_buf_clear) | ||
658 | goto free_mem; | ||
659 | |||
660 | /* Allocate and initialize speed setup packet */ | ||
661 | kingsun->speed_setuprequest = | ||
662 | kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); | ||
663 | if (!kingsun->speed_setuprequest) | ||
664 | goto free_mem; | ||
665 | kingsun->speed_setuprequest->bRequestType = | ||
666 | USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE; | ||
667 | kingsun->speed_setuprequest->bRequest = KINGSUN_REQ_SEND; | ||
668 | kingsun->speed_setuprequest->wValue = cpu_to_le16(0x0200); | ||
669 | kingsun->speed_setuprequest->wIndex = cpu_to_le16(0x0001); | ||
670 | kingsun->speed_setuprequest->wLength = | ||
671 | cpu_to_le16(sizeof(struct ksdazzle_speedparams)); | ||
672 | |||
673 | printk(KERN_INFO "KingSun/Dazzle IRDA/USB found at address %d, " | ||
674 | "Vendor: %x, Product: %x\n", | ||
675 | dev->devnum, le16_to_cpu(dev->descriptor.idVendor), | ||
676 | le16_to_cpu(dev->descriptor.idProduct)); | ||
677 | |||
678 | /* Initialize QoS for this device */ | ||
679 | irda_init_max_qos_capabilies(&kingsun->qos); | ||
680 | |||
681 | /* Baud rates known to be supported. Please uncomment if devices (other | ||
682 | than a SonyEriccson K300 phone) can be shown to support higher speeds | ||
683 | with this dongle. | ||
684 | */ | ||
685 | kingsun->qos.baud_rate.bits = | ||
686 | IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200; | ||
687 | kingsun->qos.min_turn_time.bits &= KINGSUN_MTT; | ||
688 | irda_qos_bits_to_value(&kingsun->qos); | ||
689 | |||
690 | /* Override the network functions we need to use */ | ||
691 | net->hard_start_xmit = ksdazzle_hard_xmit; | ||
692 | net->open = ksdazzle_net_open; | ||
693 | net->stop = ksdazzle_net_close; | ||
694 | net->get_stats = ksdazzle_net_get_stats; | ||
695 | net->do_ioctl = ksdazzle_net_ioctl; | ||
696 | |||
697 | ret = register_netdev(net); | ||
698 | if (ret != 0) | ||
699 | goto free_mem; | ||
700 | |||
701 | info("IrDA: Registered KingSun/Dazzle device %s", net->name); | ||
702 | |||
703 | usb_set_intfdata(intf, kingsun); | ||
704 | |||
705 | /* Situation at this point: | ||
706 | - all work buffers allocated | ||
707 | - setup requests pre-filled | ||
708 | - urbs not allocated, set to NULL | ||
709 | - max rx packet known (is KINGSUN_FIFO_SIZE) | ||
710 | - unwrap state machine (partially) initialized, but skb == NULL | ||
711 | */ | ||
712 | |||
713 | return 0; | ||
714 | |||
715 | free_mem: | ||
716 | kfree(kingsun->speed_setuprequest); | ||
717 | kfree(kingsun->tx_buf_clear); | ||
718 | free_netdev(net); | ||
719 | err_out1: | ||
720 | return ret; | ||
721 | } | ||
722 | |||
723 | /* | ||
724 | * The current device is removed, the USB layer tell us to shut it down... | ||
725 | */ | ||
726 | static void ksdazzle_disconnect(struct usb_interface *intf) | ||
727 | { | ||
728 | struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); | ||
729 | |||
730 | if (!kingsun) | ||
731 | return; | ||
732 | |||
733 | unregister_netdev(kingsun->netdev); | ||
734 | |||
735 | /* Mop up receive && transmit urb's */ | ||
736 | usb_kill_urb(kingsun->speed_urb); | ||
737 | usb_free_urb(kingsun->speed_urb); | ||
738 | kingsun->speed_urb = NULL; | ||
739 | |||
740 | usb_kill_urb(kingsun->tx_urb); | ||
741 | usb_free_urb(kingsun->tx_urb); | ||
742 | kingsun->tx_urb = NULL; | ||
743 | |||
744 | usb_kill_urb(kingsun->rx_urb); | ||
745 | usb_free_urb(kingsun->rx_urb); | ||
746 | kingsun->rx_urb = NULL; | ||
747 | |||
748 | kfree(kingsun->speed_setuprequest); | ||
749 | kfree(kingsun->tx_buf_clear); | ||
750 | free_netdev(kingsun->netdev); | ||
751 | |||
752 | usb_set_intfdata(intf, NULL); | ||
753 | } | ||
754 | |||
755 | #ifdef CONFIG_PM | ||
756 | /* USB suspend, so power off the transmitter/receiver */ | ||
757 | static int ksdazzle_suspend(struct usb_interface *intf, pm_message_t message) | ||
758 | { | ||
759 | struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); | ||
760 | |||
761 | netif_device_detach(kingsun->netdev); | ||
762 | if (kingsun->speed_urb != NULL) | ||
763 | usb_kill_urb(kingsun->speed_urb); | ||
764 | if (kingsun->tx_urb != NULL) | ||
765 | usb_kill_urb(kingsun->tx_urb); | ||
766 | if (kingsun->rx_urb != NULL) | ||
767 | usb_kill_urb(kingsun->rx_urb); | ||
768 | return 0; | ||
769 | } | ||
770 | |||
771 | /* Coming out of suspend, so reset hardware */ | ||
772 | static int ksdazzle_resume(struct usb_interface *intf) | ||
773 | { | ||
774 | struct ksdazzle_cb *kingsun = usb_get_intfdata(intf); | ||
775 | |||
776 | if (kingsun->rx_urb != NULL) { | ||
777 | /* Setup request already filled in ksdazzle_probe */ | ||
778 | usb_submit_urb(kingsun->rx_urb, GFP_KERNEL); | ||
779 | } | ||
780 | netif_device_attach(kingsun->netdev); | ||
781 | |||
782 | return 0; | ||
783 | } | ||
784 | #endif | ||
785 | |||
786 | /* | ||
787 | * USB device callbacks | ||
788 | */ | ||
789 | static struct usb_driver irda_driver = { | ||
790 | .name = "ksdazzle-sir", | ||
791 | .probe = ksdazzle_probe, | ||
792 | .disconnect = ksdazzle_disconnect, | ||
793 | .id_table = dongles, | ||
794 | #ifdef CONFIG_PM | ||
795 | .suspend = ksdazzle_suspend, | ||
796 | .resume = ksdazzle_resume, | ||
797 | #endif | ||
798 | }; | ||
799 | |||
800 | /* | ||
801 | * Module insertion | ||
802 | */ | ||
803 | static int __init ksdazzle_init(void) | ||
804 | { | ||
805 | return usb_register(&irda_driver); | ||
806 | } | ||
807 | |||
808 | module_init(ksdazzle_init); | ||
809 | |||
810 | /* | ||
811 | * Module removal | ||
812 | */ | ||
813 | static void __exit ksdazzle_cleanup(void) | ||
814 | { | ||
815 | /* Deregister the driver and remove all pending instances */ | ||
816 | usb_deregister(&irda_driver); | ||
817 | } | ||
818 | |||
819 | module_exit(ksdazzle_cleanup); | ||
820 | |||
821 | MODULE_AUTHOR("Alex Villacís Lasso <a_villacis@palosanto.com>"); | ||
822 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver for KingSun Dazzle"); | ||
823 | MODULE_LICENSE("GPL"); | ||