Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * A driver for the Griffin Technology, Inc. "PowerMate" USB controller dial. |
| 3 | * |
| 4 | * v1.1, (c)2002 William R Sowerbutts <will@sowerbutts.com> |
| 5 | * |
| 6 | * This device is a anodised aluminium knob which connects over USB. It can measure |
| 7 | * clockwise and anticlockwise rotation. The dial also acts as a pushbutton with |
| 8 | * a spring for automatic release. The base contains a pair of LEDs which illuminate |
| 9 | * the translucent base. It rotates without limit and reports its relative rotation |
| 10 | * back to the host when polled by the USB controller. |
| 11 | * |
| 12 | * Testing with the knob I have has shown that it measures approximately 94 "clicks" |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 13 | * for one full rotation. Testing with my High Speed Rotation Actuator (ok, it was |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * a variable speed cordless electric drill) has shown that the device can measure |
| 15 | * speeds of up to 7 clicks either clockwise or anticlockwise between pollings from |
| 16 | * the host. If it counts more than 7 clicks before it is polled, it will wrap back |
| 17 | * to zero and start counting again. This was at quite high speed, however, almost |
| 18 | * certainly faster than the human hand could turn it. Griffin say that it loses a |
| 19 | * pulse or two on a direction change; the granularity is so fine that I never |
| 20 | * noticed this in practice. |
| 21 | * |
| 22 | * The device's microcontroller can be programmed to set the LED to either a constant |
| 23 | * intensity, or to a rhythmic pulsing. Several patterns and speeds are available. |
| 24 | * |
| 25 | * Griffin were very happy to provide documentation and free hardware for development. |
| 26 | * |
| 27 | * Some userspace tools are available on the web: http://sowerbutts.com/powermate/ |
| 28 | * |
| 29 | */ |
| 30 | |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/input.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/spinlock.h> |
| 37 | #include <linux/usb.h> |
Dmitry Torokhov | 16a334c | 2005-06-30 00:49:08 -0500 | [diff] [blame] | 38 | #include <linux/usb_input.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | #define POWERMATE_VENDOR 0x077d /* Griffin Technology, Inc. */ |
| 41 | #define POWERMATE_PRODUCT_NEW 0x0410 /* Griffin PowerMate */ |
| 42 | #define POWERMATE_PRODUCT_OLD 0x04AA /* Griffin soundKnob */ |
| 43 | |
| 44 | #define CONTOUR_VENDOR 0x05f3 /* Contour Design, Inc. */ |
| 45 | #define CONTOUR_JOG 0x0240 /* Jog and Shuttle */ |
| 46 | |
| 47 | /* these are the command codes we send to the device */ |
| 48 | #define SET_STATIC_BRIGHTNESS 0x01 |
| 49 | #define SET_PULSE_ASLEEP 0x02 |
| 50 | #define SET_PULSE_AWAKE 0x03 |
| 51 | #define SET_PULSE_MODE 0x04 |
| 52 | |
| 53 | /* these refer to bits in the powermate_device's requires_update field. */ |
| 54 | #define UPDATE_STATIC_BRIGHTNESS (1<<0) |
| 55 | #define UPDATE_PULSE_ASLEEP (1<<1) |
| 56 | #define UPDATE_PULSE_AWAKE (1<<2) |
| 57 | #define UPDATE_PULSE_MODE (1<<3) |
| 58 | |
| 59 | /* at least two versions of the hardware exist, with differing payload |
| 60 | sizes. the first three bytes always contain the "interesting" data in |
| 61 | the relevant format. */ |
| 62 | #define POWERMATE_PAYLOAD_SIZE_MAX 6 |
| 63 | #define POWERMATE_PAYLOAD_SIZE_MIN 3 |
| 64 | struct powermate_device { |
| 65 | signed char *data; |
| 66 | dma_addr_t data_dma; |
| 67 | struct urb *irq, *config; |
| 68 | struct usb_ctrlrequest *configcr; |
| 69 | dma_addr_t configcr_dma; |
| 70 | struct usb_device *udev; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 71 | struct input_dev *input; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | spinlock_t lock; |
| 73 | int static_brightness; |
| 74 | int pulse_speed; |
| 75 | int pulse_table; |
| 76 | int pulse_asleep; |
| 77 | int pulse_awake; |
| 78 | int requires_update; // physical settings which are out of sync |
| 79 | char phys[64]; |
| 80 | }; |
| 81 | |
| 82 | static char pm_name_powermate[] = "Griffin PowerMate"; |
| 83 | static char pm_name_soundknob[] = "Griffin SoundKnob"; |
| 84 | |
| 85 | static void powermate_config_complete(struct urb *urb, struct pt_regs *regs); |
| 86 | |
| 87 | /* Callback for data arriving from the PowerMate over the USB interrupt pipe */ |
| 88 | static void powermate_irq(struct urb *urb, struct pt_regs *regs) |
| 89 | { |
| 90 | struct powermate_device *pm = urb->context; |
| 91 | int retval; |
| 92 | |
| 93 | switch (urb->status) { |
| 94 | case 0: |
| 95 | /* success */ |
| 96 | break; |
| 97 | case -ECONNRESET: |
| 98 | case -ENOENT: |
| 99 | case -ESHUTDOWN: |
| 100 | /* this urb is terminated, clean up */ |
| 101 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
| 102 | return; |
| 103 | default: |
| 104 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); |
| 105 | goto exit; |
| 106 | } |
| 107 | |
| 108 | /* handle updates to device state */ |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 109 | input_regs(pm->input, regs); |
| 110 | input_report_key(pm->input, BTN_0, pm->data[0] & 0x01); |
| 111 | input_report_rel(pm->input, REL_DIAL, pm->data[1]); |
| 112 | input_sync(pm->input); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | exit: |
| 115 | retval = usb_submit_urb (urb, GFP_ATOMIC); |
| 116 | if (retval) |
| 117 | err ("%s - usb_submit_urb failed with result %d", |
| 118 | __FUNCTION__, retval); |
| 119 | } |
| 120 | |
| 121 | /* Decide if we need to issue a control message and do so. Must be called with pm->lock taken */ |
| 122 | static void powermate_sync_state(struct powermate_device *pm) |
| 123 | { |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 124 | if (pm->requires_update == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | return; /* no updates are required */ |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 126 | if (pm->config->status == -EINPROGRESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | return; /* an update is already in progress; it'll issue this update when it completes */ |
| 128 | |
| 129 | if (pm->requires_update & UPDATE_PULSE_ASLEEP){ |
| 130 | pm->configcr->wValue = cpu_to_le16( SET_PULSE_ASLEEP ); |
| 131 | pm->configcr->wIndex = cpu_to_le16( pm->pulse_asleep ? 1 : 0 ); |
| 132 | pm->requires_update &= ~UPDATE_PULSE_ASLEEP; |
| 133 | }else if (pm->requires_update & UPDATE_PULSE_AWAKE){ |
| 134 | pm->configcr->wValue = cpu_to_le16( SET_PULSE_AWAKE ); |
| 135 | pm->configcr->wIndex = cpu_to_le16( pm->pulse_awake ? 1 : 0 ); |
| 136 | pm->requires_update &= ~UPDATE_PULSE_AWAKE; |
| 137 | }else if (pm->requires_update & UPDATE_PULSE_MODE){ |
| 138 | int op, arg; |
| 139 | /* the powermate takes an operation and an argument for its pulse algorithm. |
| 140 | the operation can be: |
| 141 | 0: divide the speed |
| 142 | 1: pulse at normal speed |
| 143 | 2: multiply the speed |
| 144 | the argument only has an effect for operations 0 and 2, and ranges between |
| 145 | 1 (least effect) to 255 (maximum effect). |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | thus, several states are equivalent and are coalesced into one state. |
| 148 | |
| 149 | we map this onto a range from 0 to 510, with: |
| 150 | 0 -- 254 -- use divide (0 = slowest) |
| 151 | 255 -- use normal speed |
| 152 | 256 -- 510 -- use multiple (510 = fastest). |
| 153 | |
| 154 | Only values of 'arg' quite close to 255 are particularly useful/spectacular. |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 155 | */ |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 156 | if (pm->pulse_speed < 255) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | op = 0; // divide |
| 158 | arg = 255 - pm->pulse_speed; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 159 | } else if (pm->pulse_speed > 255) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | op = 2; // multiply |
| 161 | arg = pm->pulse_speed - 255; |
| 162 | } else { |
| 163 | op = 1; // normal speed |
| 164 | arg = 0; // can be any value |
| 165 | } |
| 166 | pm->configcr->wValue = cpu_to_le16( (pm->pulse_table << 8) | SET_PULSE_MODE ); |
| 167 | pm->configcr->wIndex = cpu_to_le16( (arg << 8) | op ); |
| 168 | pm->requires_update &= ~UPDATE_PULSE_MODE; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 169 | } else if (pm->requires_update & UPDATE_STATIC_BRIGHTNESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | pm->configcr->wValue = cpu_to_le16( SET_STATIC_BRIGHTNESS ); |
| 171 | pm->configcr->wIndex = cpu_to_le16( pm->static_brightness ); |
| 172 | pm->requires_update &= ~UPDATE_STATIC_BRIGHTNESS; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 173 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | printk(KERN_ERR "powermate: unknown update required"); |
| 175 | pm->requires_update = 0; /* fudge the bug */ |
| 176 | return; |
| 177 | } |
| 178 | |
| 179 | /* printk("powermate: %04x %04x\n", pm->configcr->wValue, pm->configcr->wIndex); */ |
| 180 | |
| 181 | pm->configcr->bRequestType = 0x41; /* vendor request */ |
| 182 | pm->configcr->bRequest = 0x01; |
| 183 | pm->configcr->wLength = 0; |
| 184 | |
| 185 | usb_fill_control_urb(pm->config, pm->udev, usb_sndctrlpipe(pm->udev, 0), |
| 186 | (void *) pm->configcr, NULL, 0, |
| 187 | powermate_config_complete, pm); |
| 188 | pm->config->setup_dma = pm->configcr_dma; |
| 189 | pm->config->transfer_flags |= URB_NO_SETUP_DMA_MAP; |
| 190 | |
| 191 | if (usb_submit_urb(pm->config, GFP_ATOMIC)) |
| 192 | printk(KERN_ERR "powermate: usb_submit_urb(config) failed"); |
| 193 | } |
| 194 | |
| 195 | /* Called when our asynchronous control message completes. We may need to issue another immediately */ |
| 196 | static void powermate_config_complete(struct urb *urb, struct pt_regs *regs) |
| 197 | { |
| 198 | struct powermate_device *pm = urb->context; |
| 199 | unsigned long flags; |
| 200 | |
| 201 | if (urb->status) |
| 202 | printk(KERN_ERR "powermate: config urb returned %d\n", urb->status); |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | spin_lock_irqsave(&pm->lock, flags); |
| 205 | powermate_sync_state(pm); |
| 206 | spin_unlock_irqrestore(&pm->lock, flags); |
| 207 | } |
| 208 | |
| 209 | /* Set the LED up as described and begin the sync with the hardware if required */ |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 210 | static void powermate_pulse_led(struct powermate_device *pm, int static_brightness, int pulse_speed, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | int pulse_table, int pulse_asleep, int pulse_awake) |
| 212 | { |
| 213 | unsigned long flags; |
| 214 | |
| 215 | if (pulse_speed < 0) |
| 216 | pulse_speed = 0; |
| 217 | if (pulse_table < 0) |
| 218 | pulse_table = 0; |
| 219 | if (pulse_speed > 510) |
| 220 | pulse_speed = 510; |
| 221 | if (pulse_table > 2) |
| 222 | pulse_table = 2; |
| 223 | |
| 224 | pulse_asleep = !!pulse_asleep; |
| 225 | pulse_awake = !!pulse_awake; |
| 226 | |
| 227 | |
| 228 | spin_lock_irqsave(&pm->lock, flags); |
| 229 | |
| 230 | /* mark state updates which are required */ |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 231 | if (static_brightness != pm->static_brightness) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | pm->static_brightness = static_brightness; |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 233 | pm->requires_update |= UPDATE_STATIC_BRIGHTNESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 235 | if (pulse_asleep != pm->pulse_asleep) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | pm->pulse_asleep = pulse_asleep; |
| 237 | pm->requires_update |= (UPDATE_PULSE_ASLEEP | UPDATE_STATIC_BRIGHTNESS); |
| 238 | } |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 239 | if (pulse_awake != pm->pulse_awake) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | pm->pulse_awake = pulse_awake; |
| 241 | pm->requires_update |= (UPDATE_PULSE_AWAKE | UPDATE_STATIC_BRIGHTNESS); |
| 242 | } |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 243 | if (pulse_speed != pm->pulse_speed || pulse_table != pm->pulse_table) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | pm->pulse_speed = pulse_speed; |
| 245 | pm->pulse_table = pulse_table; |
| 246 | pm->requires_update |= UPDATE_PULSE_MODE; |
| 247 | } |
| 248 | |
| 249 | powermate_sync_state(pm); |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | spin_unlock_irqrestore(&pm->lock, flags); |
| 252 | } |
| 253 | |
| 254 | /* Callback from the Input layer when an event arrives from userspace to configure the LED */ |
| 255 | static int powermate_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int _value) |
| 256 | { |
| 257 | unsigned int command = (unsigned int)_value; |
| 258 | struct powermate_device *pm = dev->private; |
| 259 | |
| 260 | if (type == EV_MSC && code == MSC_PULSELED){ |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 261 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | bits 0- 7: 8 bits: LED brightness |
| 263 | bits 8-16: 9 bits: pulsing speed modifier (0 ... 510); 0-254 = slower, 255 = standard, 256-510 = faster. |
| 264 | bits 17-18: 2 bits: pulse table (0, 1, 2 valid) |
| 265 | bit 19: 1 bit : pulse whilst asleep? |
| 266 | bit 20: 1 bit : pulse constantly? |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 267 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | int static_brightness = command & 0xFF; // bits 0-7 |
| 269 | int pulse_speed = (command >> 8) & 0x1FF; // bits 8-16 |
| 270 | int pulse_table = (command >> 17) & 0x3; // bits 17-18 |
| 271 | int pulse_asleep = (command >> 19) & 0x1; // bit 19 |
| 272 | int pulse_awake = (command >> 20) & 0x1; // bit 20 |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | powermate_pulse_led(pm, static_brightness, pulse_speed, pulse_table, pulse_asleep, pulse_awake); |
| 275 | } |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static int powermate_alloc_buffers(struct usb_device *udev, struct powermate_device *pm) |
| 281 | { |
| 282 | pm->data = usb_buffer_alloc(udev, POWERMATE_PAYLOAD_SIZE_MAX, |
| 283 | SLAB_ATOMIC, &pm->data_dma); |
| 284 | if (!pm->data) |
| 285 | return -1; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | pm->configcr = usb_buffer_alloc(udev, sizeof(*(pm->configcr)), |
| 288 | SLAB_ATOMIC, &pm->configcr_dma); |
| 289 | if (!pm->configcr) |
| 290 | return -1; |
| 291 | |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | static void powermate_free_buffers(struct usb_device *udev, struct powermate_device *pm) |
| 296 | { |
| 297 | if (pm->data) |
| 298 | usb_buffer_free(udev, POWERMATE_PAYLOAD_SIZE_MAX, |
| 299 | pm->data, pm->data_dma); |
| 300 | if (pm->configcr) |
| 301 | usb_buffer_free(udev, sizeof(*(pm->configcr)), |
| 302 | pm->configcr, pm->configcr_dma); |
| 303 | } |
| 304 | |
| 305 | /* Called whenever a USB device matching one in our supported devices table is connected */ |
| 306 | static int powermate_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| 307 | { |
| 308 | struct usb_device *udev = interface_to_usbdev (intf); |
| 309 | struct usb_host_interface *interface; |
| 310 | struct usb_endpoint_descriptor *endpoint; |
| 311 | struct powermate_device *pm; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 312 | struct input_dev *input_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | int pipe, maxp; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 314 | int err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | interface = intf->cur_altsetting; |
| 317 | endpoint = &interface->endpoint[0].desc; |
| 318 | if (!(endpoint->bEndpointAddress & 0x80)) |
| 319 | return -EIO; |
| 320 | if ((endpoint->bmAttributes & 3) != 3) |
| 321 | return -EIO; |
| 322 | |
| 323 | usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
| 324 | 0x0a, USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| 325 | 0, interface->desc.bInterfaceNumber, NULL, 0, |
| 326 | USB_CTRL_SET_TIMEOUT); |
| 327 | |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 328 | pm = kzalloc(sizeof(struct powermate_device), GFP_KERNEL); |
| 329 | input_dev = input_allocate_device(); |
| 330 | if (!pm || !input_dev) |
| 331 | goto fail1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 333 | if (powermate_alloc_buffers(udev, pm)) |
| 334 | goto fail2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | pm->irq = usb_alloc_urb(0, GFP_KERNEL); |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 337 | if (!pm->irq) |
| 338 | goto fail2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
| 340 | pm->config = usb_alloc_urb(0, GFP_KERNEL); |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 341 | if (!pm->config) |
| 342 | goto fail3; |
| 343 | |
| 344 | pm->udev = udev; |
| 345 | pm->input = input_dev; |
| 346 | |
| 347 | usb_make_path(udev, pm->phys, sizeof(pm->phys)); |
| 348 | strlcpy(pm->phys, "/input0", sizeof(pm->phys)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
| 350 | spin_lock_init(&pm->lock); |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 351 | |
| 352 | switch (le16_to_cpu(udev->descriptor.idProduct)) { |
| 353 | case POWERMATE_PRODUCT_NEW: |
| 354 | input_dev->name = pm_name_powermate; |
| 355 | break; |
| 356 | case POWERMATE_PRODUCT_OLD: |
| 357 | input_dev->name = pm_name_soundknob; |
| 358 | break; |
| 359 | default: |
| 360 | input_dev->name = pm_name_soundknob; |
| 361 | printk(KERN_WARNING "powermate: unknown product id %04x\n", |
| 362 | le16_to_cpu(udev->descriptor.idProduct)); |
| 363 | } |
| 364 | |
| 365 | input_dev->phys = pm->phys; |
| 366 | usb_to_input_id(udev, &input_dev->id); |
| 367 | input_dev->cdev.dev = &intf->dev; |
| 368 | input_dev->private = pm; |
| 369 | |
| 370 | input_dev->event = powermate_input_event; |
| 371 | |
| 372 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_MSC); |
| 373 | input_dev->keybit[LONG(BTN_0)] = BIT(BTN_0); |
| 374 | input_dev->relbit[LONG(REL_DIAL)] = BIT(REL_DIAL); |
| 375 | input_dev->mscbit[LONG(MSC_PULSELED)] = BIT(MSC_PULSELED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | /* get a handle to the interrupt data pipe */ |
| 378 | pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress); |
| 379 | maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe)); |
| 380 | |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 381 | if (maxp < POWERMATE_PAYLOAD_SIZE_MIN || maxp > POWERMATE_PAYLOAD_SIZE_MAX) { |
| 382 | printk(KERN_WARNING "powermate: Expected payload of %d--%d bytes, found %d bytes!\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | POWERMATE_PAYLOAD_SIZE_MIN, POWERMATE_PAYLOAD_SIZE_MAX, maxp); |
| 384 | maxp = POWERMATE_PAYLOAD_SIZE_MAX; |
| 385 | } |
| 386 | |
| 387 | usb_fill_int_urb(pm->irq, udev, pipe, pm->data, |
| 388 | maxp, powermate_irq, |
| 389 | pm, endpoint->bInterval); |
| 390 | pm->irq->transfer_dma = pm->data_dma; |
| 391 | pm->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| 392 | |
| 393 | /* register our interrupt URB with the USB system */ |
| 394 | if (usb_submit_urb(pm->irq, GFP_KERNEL)) { |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 395 | err = -EIO; |
| 396 | goto fail4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 399 | input_register_device(pm->input); |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | /* force an update of everything */ |
| 402 | pm->requires_update = UPDATE_PULSE_ASLEEP | UPDATE_PULSE_AWAKE | UPDATE_PULSE_MODE | UPDATE_STATIC_BRIGHTNESS; |
| 403 | powermate_pulse_led(pm, 0x80, 255, 0, 1, 0); // set default pulse parameters |
Dmitry Torokhov | 05f091a | 2005-05-29 02:29:01 -0500 | [diff] [blame] | 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | usb_set_intfdata(intf, pm); |
| 406 | return 0; |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 407 | |
| 408 | fail4: usb_free_urb(pm->config); |
| 409 | fail3: usb_free_urb(pm->irq); |
| 410 | fail2: powermate_free_buffers(udev, pm); |
| 411 | fail1: input_free_device(input_dev); |
| 412 | kfree(pm); |
| 413 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | /* Called when a USB device we've accepted ownership of is removed */ |
| 417 | static void powermate_disconnect(struct usb_interface *intf) |
| 418 | { |
| 419 | struct powermate_device *pm = usb_get_intfdata (intf); |
| 420 | |
| 421 | usb_set_intfdata(intf, NULL); |
| 422 | if (pm) { |
| 423 | pm->requires_update = 0; |
| 424 | usb_kill_urb(pm->irq); |
Dmitry Torokhov | c5b7c7c | 2005-09-15 02:01:47 -0500 | [diff] [blame] | 425 | input_unregister_device(pm->input); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | usb_free_urb(pm->irq); |
| 427 | usb_free_urb(pm->config); |
| 428 | powermate_free_buffers(interface_to_usbdev(intf), pm); |
| 429 | |
| 430 | kfree(pm); |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | static struct usb_device_id powermate_devices [] = { |
| 435 | { USB_DEVICE(POWERMATE_VENDOR, POWERMATE_PRODUCT_NEW) }, |
| 436 | { USB_DEVICE(POWERMATE_VENDOR, POWERMATE_PRODUCT_OLD) }, |
| 437 | { USB_DEVICE(CONTOUR_VENDOR, CONTOUR_JOG) }, |
| 438 | { } /* Terminating entry */ |
| 439 | }; |
| 440 | |
| 441 | MODULE_DEVICE_TABLE (usb, powermate_devices); |
| 442 | |
| 443 | static struct usb_driver powermate_driver = { |
| 444 | .owner = THIS_MODULE, |
| 445 | .name = "powermate", |
| 446 | .probe = powermate_probe, |
| 447 | .disconnect = powermate_disconnect, |
| 448 | .id_table = powermate_devices, |
| 449 | }; |
| 450 | |
| 451 | static int __init powermate_init(void) |
| 452 | { |
| 453 | return usb_register(&powermate_driver); |
| 454 | } |
| 455 | |
| 456 | static void __exit powermate_cleanup(void) |
| 457 | { |
| 458 | usb_deregister(&powermate_driver); |
| 459 | } |
| 460 | |
| 461 | module_init(powermate_init); |
| 462 | module_exit(powermate_cleanup); |
| 463 | |
| 464 | MODULE_AUTHOR( "William R Sowerbutts" ); |
| 465 | MODULE_DESCRIPTION( "Griffin Technology, Inc PowerMate driver" ); |
| 466 | MODULE_LICENSE("GPL"); |