Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Greybus "AP" USB driver for "ES2" controller chips |
| 3 | * |
Alex Elder | 142f8dd | 2015-03-26 21:25:06 -0500 | [diff] [blame] | 4 | * Copyright 2014-2015 Google Inc. |
| 5 | * Copyright 2014-2015 Linaro Ltd. |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 6 | * |
| 7 | * Released under the GPLv2 only. |
| 8 | */ |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 9 | #include <linux/kthread.h> |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 10 | #include <linux/sizes.h> |
| 11 | #include <linux/usb.h> |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 12 | #include <linux/kfifo.h> |
| 13 | #include <linux/debugfs.h> |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 14 | #include <asm/unaligned.h> |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 15 | |
| 16 | #include "greybus.h" |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 17 | #include "kernel_ver.h" |
Bryan O'Donoghue | 3f2a809 | 2015-08-11 13:50:52 +0100 | [diff] [blame] | 18 | #include "connection.h" |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 19 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 20 | /* Memory sizes for the buffers sent to/from the ES1 controller */ |
Greg Kroah-Hartman | cce3103 | 2015-06-09 13:47:48 -0700 | [diff] [blame] | 21 | #define ES1_GBUF_MSG_SIZE_MAX 2048 |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 22 | |
| 23 | static const struct usb_device_id id_table[] = { |
Greg Kroah-Hartman | 2bf4c87 | 2015-03-02 08:52:07 -0800 | [diff] [blame] | 24 | /* Made up numbers for the SVC USB Bridge in ES2 */ |
| 25 | { USB_DEVICE(0xffff, 0x0002) }, |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 26 | { }, |
| 27 | }; |
| 28 | MODULE_DEVICE_TABLE(usb, id_table); |
| 29 | |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 30 | #define APB1_LOG_SIZE SZ_16K |
| 31 | static struct dentry *apb1_log_dentry; |
| 32 | static struct dentry *apb1_log_enable_dentry; |
| 33 | static struct task_struct *apb1_log_task; |
| 34 | static DEFINE_KFIFO(apb1_log_fifo, char, APB1_LOG_SIZE); |
| 35 | |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 36 | /* Number of cport present on USB bridge */ |
| 37 | #define CPORT_MAX 44 |
| 38 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 39 | /* Number of bulk in and bulk out couple */ |
| 40 | #define NUM_BULKS 7 |
| 41 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 42 | /* |
| 43 | * Number of CPort IN urbs in flight at any point in time. |
| 44 | * Adjust if we are having stalls in the USB buffer due to not enough urbs in |
| 45 | * flight. |
| 46 | */ |
| 47 | #define NUM_CPORT_IN_URB 4 |
| 48 | |
| 49 | /* Number of CPort OUT urbs in flight at any point in time. |
| 50 | * Adjust if we get messages saying we are out of urbs in the system log. |
| 51 | */ |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 52 | #define NUM_CPORT_OUT_URB (8 * NUM_BULKS) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 53 | |
Alexandre Bailon | 611c1739 | 2015-06-15 18:08:11 +0200 | [diff] [blame] | 54 | /* vendor request AP message */ |
| 55 | #define REQUEST_SVC 0x01 |
| 56 | |
| 57 | /* vendor request APB1 log */ |
| 58 | #define REQUEST_LOG 0x02 |
| 59 | |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 60 | /* vendor request to map a cport to bulk in and bulk out endpoints */ |
| 61 | #define REQUEST_EP_MAPPING 0x03 |
| 62 | |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 63 | /* |
| 64 | * @endpoint: bulk in endpoint for CPort data |
| 65 | * @urb: array of urbs for the CPort in messages |
| 66 | * @buffer: array of buffers for the @cport_in_urb urbs |
| 67 | */ |
| 68 | struct es1_cport_in { |
| 69 | __u8 endpoint; |
| 70 | struct urb *urb[NUM_CPORT_IN_URB]; |
| 71 | u8 *buffer[NUM_CPORT_IN_URB]; |
| 72 | }; |
| 73 | |
| 74 | /* |
| 75 | * @endpoint: bulk out endpoint for CPort data |
| 76 | */ |
| 77 | struct es1_cport_out { |
| 78 | __u8 endpoint; |
| 79 | }; |
| 80 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 81 | /** |
| 82 | * es1_ap_dev - ES1 USB Bridge to AP structure |
| 83 | * @usb_dev: pointer to the USB device we are. |
| 84 | * @usb_intf: pointer to the USB interface we are bound to. |
| 85 | * @hd: pointer to our greybus_host_device structure |
| 86 | * @control_endpoint: endpoint to send data to SVC |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 87 | |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 88 | * @cport_in: endpoint, urbs and buffer for cport in messages |
| 89 | * @cport_out: endpoint for for cport out messages |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 90 | * @cport_out_urb: array of urbs for the CPort out messages |
| 91 | * @cport_out_urb_busy: array of flags to see if the @cport_out_urb is busy or |
| 92 | * not. |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 93 | * @cport_out_urb_cancelled: array of flags indicating whether the |
| 94 | * corresponding @cport_out_urb is being cancelled |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 95 | * @cport_out_urb_lock: locks the @cport_out_urb_busy "list" |
| 96 | */ |
| 97 | struct es1_ap_dev { |
| 98 | struct usb_device *usb_dev; |
| 99 | struct usb_interface *usb_intf; |
| 100 | struct greybus_host_device *hd; |
| 101 | |
| 102 | __u8 control_endpoint; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 103 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 104 | struct es1_cport_in cport_in[NUM_BULKS]; |
| 105 | struct es1_cport_out cport_out[NUM_BULKS]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 106 | struct urb *cport_out_urb[NUM_CPORT_OUT_URB]; |
| 107 | bool cport_out_urb_busy[NUM_CPORT_OUT_URB]; |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 108 | bool cport_out_urb_cancelled[NUM_CPORT_OUT_URB]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 109 | spinlock_t cport_out_urb_lock; |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 110 | |
| 111 | int cport_to_ep[CPORT_MAX]; |
| 112 | }; |
| 113 | |
| 114 | struct cport_to_ep { |
| 115 | __le16 cport_id; |
| 116 | __u8 endpoint_in; |
| 117 | __u8 endpoint_out; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 118 | }; |
| 119 | |
| 120 | static inline struct es1_ap_dev *hd_to_es1(struct greybus_host_device *hd) |
| 121 | { |
| 122 | return (struct es1_ap_dev *)&hd->hd_priv; |
| 123 | } |
| 124 | |
| 125 | static void cport_out_callback(struct urb *urb); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 126 | static void usb_log_enable(struct es1_ap_dev *es1); |
| 127 | static void usb_log_disable(struct es1_ap_dev *es1); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 128 | |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 129 | static int cport_to_ep(struct es1_ap_dev *es1, u16 cport_id) |
| 130 | { |
| 131 | if (cport_id >= CPORT_MAX) |
| 132 | return 0; |
| 133 | return es1->cport_to_ep[cport_id]; |
| 134 | } |
| 135 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 136 | #define ES1_TIMEOUT 500 /* 500 ms for the SVC to do something */ |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 137 | |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 138 | static int ep_in_use(struct es1_ap_dev *es1, int bulk_ep_set) |
| 139 | { |
| 140 | int i; |
| 141 | |
| 142 | for (i = 0; i < CPORT_MAX; i++) { |
| 143 | if (es1->cport_to_ep[i] == bulk_ep_set) |
| 144 | return 1; |
| 145 | } |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | int map_cport_to_ep(struct es1_ap_dev *es1, |
| 150 | u16 cport_id, int bulk_ep_set) |
| 151 | { |
| 152 | int retval; |
| 153 | struct cport_to_ep *cport_to_ep; |
| 154 | |
| 155 | if (bulk_ep_set == 0 || bulk_ep_set >= NUM_BULKS) |
| 156 | return -EINVAL; |
| 157 | if (cport_id >= CPORT_MAX) |
| 158 | return -EINVAL; |
| 159 | if (bulk_ep_set && ep_in_use(es1, bulk_ep_set)) |
| 160 | return -EINVAL; |
| 161 | |
| 162 | cport_to_ep = kmalloc(sizeof(*cport_to_ep), GFP_KERNEL); |
| 163 | if (!cport_to_ep) |
| 164 | return -ENOMEM; |
| 165 | |
| 166 | es1->cport_to_ep[cport_id] = bulk_ep_set; |
| 167 | cport_to_ep->cport_id = cpu_to_le16(cport_id); |
| 168 | cport_to_ep->endpoint_in = es1->cport_in[bulk_ep_set].endpoint; |
| 169 | cport_to_ep->endpoint_out = es1->cport_out[bulk_ep_set].endpoint; |
| 170 | |
| 171 | retval = usb_control_msg(es1->usb_dev, |
| 172 | usb_sndctrlpipe(es1->usb_dev, |
| 173 | es1->control_endpoint), |
| 174 | REQUEST_EP_MAPPING, |
| 175 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
| 176 | 0x00, 0x00, |
| 177 | (char *)cport_to_ep, |
| 178 | sizeof(*cport_to_ep), |
| 179 | ES1_TIMEOUT); |
| 180 | if (retval == sizeof(*cport_to_ep)) |
| 181 | retval = 0; |
| 182 | kfree(cport_to_ep); |
| 183 | |
| 184 | return retval; |
| 185 | } |
| 186 | |
| 187 | int unmap_cport(struct es1_ap_dev *es1, u16 cport_id) |
| 188 | { |
| 189 | return map_cport_to_ep(es1, cport_id, 0); |
| 190 | } |
| 191 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 192 | static struct urb *next_free_urb(struct es1_ap_dev *es1, gfp_t gfp_mask) |
| 193 | { |
| 194 | struct urb *urb = NULL; |
| 195 | unsigned long flags; |
| 196 | int i; |
| 197 | |
| 198 | spin_lock_irqsave(&es1->cport_out_urb_lock, flags); |
| 199 | |
| 200 | /* Look in our pool of allocated urbs first, as that's the "fastest" */ |
| 201 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 202 | if (es1->cport_out_urb_busy[i] == false && |
| 203 | es1->cport_out_urb_cancelled[i] == false) { |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 204 | es1->cport_out_urb_busy[i] = true; |
| 205 | urb = es1->cport_out_urb[i]; |
| 206 | break; |
| 207 | } |
| 208 | } |
| 209 | spin_unlock_irqrestore(&es1->cport_out_urb_lock, flags); |
| 210 | if (urb) |
| 211 | return urb; |
| 212 | |
| 213 | /* |
| 214 | * Crap, pool is empty, complain to the syslog and go allocate one |
| 215 | * dynamically as we have to succeed. |
| 216 | */ |
| 217 | dev_err(&es1->usb_dev->dev, |
| 218 | "No free CPort OUT urbs, having to dynamically allocate one!\n"); |
| 219 | return usb_alloc_urb(0, gfp_mask); |
| 220 | } |
| 221 | |
| 222 | static void free_urb(struct es1_ap_dev *es1, struct urb *urb) |
| 223 | { |
| 224 | unsigned long flags; |
| 225 | int i; |
| 226 | /* |
| 227 | * See if this was an urb in our pool, if so mark it "free", otherwise |
| 228 | * we need to free it ourselves. |
| 229 | */ |
| 230 | spin_lock_irqsave(&es1->cport_out_urb_lock, flags); |
| 231 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 232 | if (urb == es1->cport_out_urb[i]) { |
| 233 | es1->cport_out_urb_busy[i] = false; |
| 234 | urb = NULL; |
| 235 | break; |
| 236 | } |
| 237 | } |
| 238 | spin_unlock_irqrestore(&es1->cport_out_urb_lock, flags); |
| 239 | |
| 240 | /* If urb is not NULL, then we need to free this urb */ |
| 241 | usb_free_urb(urb); |
| 242 | } |
| 243 | |
| 244 | /* |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 245 | * We (ab)use the operation-message header pad bytes to transfer the |
| 246 | * cport id in order to minimise overhead. |
| 247 | */ |
| 248 | static void |
| 249 | gb_message_cport_pack(struct gb_operation_msg_hdr *header, u16 cport_id) |
| 250 | { |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 251 | header->pad[0] = cport_id; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | /* Clear the pad bytes used for the CPort id */ |
| 255 | static void gb_message_cport_clear(struct gb_operation_msg_hdr *header) |
| 256 | { |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 257 | header->pad[0] = 0; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | /* Extract the CPort id packed into the header, and clear it */ |
| 261 | static u16 gb_message_cport_unpack(struct gb_operation_msg_hdr *header) |
| 262 | { |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 263 | u16 cport_id = header->pad[0]; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 264 | |
| 265 | gb_message_cport_clear(header); |
| 266 | |
| 267 | return cport_id; |
| 268 | } |
| 269 | |
| 270 | /* |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 271 | * Returns zero if the message was successfully queued, or a negative errno |
| 272 | * otherwise. |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 273 | */ |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 274 | static int message_send(struct greybus_host_device *hd, u16 cport_id, |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 275 | struct gb_message *message, gfp_t gfp_mask) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 276 | { |
| 277 | struct es1_ap_dev *es1 = hd_to_es1(hd); |
| 278 | struct usb_device *udev = es1->usb_dev; |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 279 | size_t buffer_size; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 280 | int retval; |
| 281 | struct urb *urb; |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 282 | int bulk_ep_set; |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 283 | unsigned long flags; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 284 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 285 | /* |
| 286 | * The data actually transferred will include an indication |
| 287 | * of where the data should be sent. Do one last check of |
| 288 | * the target CPort id before filling it in. |
| 289 | */ |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 290 | if (!cport_id_valid(cport_id)) { |
| 291 | pr_err("invalid destination cport 0x%02x\n", cport_id); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 292 | return -EINVAL; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 293 | } |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 294 | |
| 295 | /* Find a free urb */ |
| 296 | urb = next_free_urb(es1, gfp_mask); |
| 297 | if (!urb) |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 298 | return -ENOMEM; |
| 299 | |
| 300 | spin_lock_irqsave(&es1->cport_out_urb_lock, flags); |
| 301 | message->hcpriv = urb; |
| 302 | spin_unlock_irqrestore(&es1->cport_out_urb_lock, flags); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 303 | |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 304 | /* Pack the cport id into the message header */ |
| 305 | gb_message_cport_pack(message->header, cport_id); |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 306 | |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 307 | buffer_size = sizeof(*message->header) + message->payload_size; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 308 | |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 309 | bulk_ep_set = cport_to_ep(es1, cport_id); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 310 | usb_fill_bulk_urb(urb, udev, |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 311 | usb_sndbulkpipe(udev, |
| 312 | es1->cport_out[bulk_ep_set].endpoint), |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 313 | message->buffer, buffer_size, |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 314 | cport_out_callback, message); |
Alexandre Bailon | 977e209 | 2015-08-31 09:00:16 +0200 | [diff] [blame^] | 315 | urb->transfer_flags |= URB_ZERO_PACKET; |
Bryan O'Donoghue | 3f2a809 | 2015-08-11 13:50:52 +0100 | [diff] [blame] | 316 | gb_connection_push_timestamp(message->operation->connection); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 317 | retval = usb_submit_urb(urb, gfp_mask); |
| 318 | if (retval) { |
| 319 | pr_err("error %d submitting URB\n", retval); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 320 | |
| 321 | spin_lock_irqsave(&es1->cport_out_urb_lock, flags); |
| 322 | message->hcpriv = NULL; |
| 323 | spin_unlock_irqrestore(&es1->cport_out_urb_lock, flags); |
| 324 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 325 | free_urb(es1, urb); |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 326 | gb_message_cport_clear(message->header); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 327 | |
| 328 | return retval; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 329 | } |
| 330 | |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 331 | return 0; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | /* |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 335 | * Can not be called in atomic context. |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 336 | */ |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 337 | static void message_cancel(struct gb_message *message) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 338 | { |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 339 | struct greybus_host_device *hd = message->operation->connection->hd; |
| 340 | struct es1_ap_dev *es1 = hd_to_es1(hd); |
| 341 | struct urb *urb; |
| 342 | int i; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 343 | |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 344 | might_sleep(); |
| 345 | |
| 346 | spin_lock_irq(&es1->cport_out_urb_lock); |
| 347 | urb = message->hcpriv; |
| 348 | |
| 349 | /* Prevent dynamically allocated urb from being deallocated. */ |
| 350 | usb_get_urb(urb); |
| 351 | |
| 352 | /* Prevent pre-allocated urb from being reused. */ |
| 353 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 354 | if (urb == es1->cport_out_urb[i]) { |
| 355 | es1->cport_out_urb_cancelled[i] = true; |
| 356 | break; |
| 357 | } |
| 358 | } |
| 359 | spin_unlock_irq(&es1->cport_out_urb_lock); |
| 360 | |
| 361 | usb_kill_urb(urb); |
| 362 | |
| 363 | if (i < NUM_CPORT_OUT_URB) { |
| 364 | spin_lock_irq(&es1->cport_out_urb_lock); |
| 365 | es1->cport_out_urb_cancelled[i] = false; |
| 366 | spin_unlock_irq(&es1->cport_out_urb_lock); |
| 367 | } |
| 368 | |
| 369 | usb_free_urb(urb); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 370 | } |
| 371 | |
| 372 | static struct greybus_host_driver es1_driver = { |
| 373 | .hd_priv_size = sizeof(struct es1_ap_dev), |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 374 | .message_send = message_send, |
| 375 | .message_cancel = message_cancel, |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 376 | }; |
| 377 | |
| 378 | /* Common function to report consistent warnings based on URB status */ |
| 379 | static int check_urb_status(struct urb *urb) |
| 380 | { |
| 381 | struct device *dev = &urb->dev->dev; |
| 382 | int status = urb->status; |
| 383 | |
| 384 | switch (status) { |
| 385 | case 0: |
| 386 | return 0; |
| 387 | |
| 388 | case -EOVERFLOW: |
| 389 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 390 | __func__, urb->actual_length); |
| 391 | case -ECONNRESET: |
| 392 | case -ENOENT: |
| 393 | case -ESHUTDOWN: |
| 394 | case -EILSEQ: |
| 395 | case -EPROTO: |
| 396 | /* device is gone, stop sending */ |
| 397 | return status; |
| 398 | } |
| 399 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 400 | |
| 401 | return -EAGAIN; |
| 402 | } |
| 403 | |
| 404 | static void ap_disconnect(struct usb_interface *interface) |
| 405 | { |
| 406 | struct es1_ap_dev *es1; |
| 407 | struct usb_device *udev; |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 408 | int bulk_in; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 409 | int i; |
| 410 | |
| 411 | es1 = usb_get_intfdata(interface); |
| 412 | if (!es1) |
| 413 | return; |
| 414 | |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 415 | usb_log_disable(es1); |
| 416 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 417 | /* Tear down everything! */ |
| 418 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 419 | struct urb *urb = es1->cport_out_urb[i]; |
| 420 | |
| 421 | if (!urb) |
| 422 | break; |
| 423 | usb_kill_urb(urb); |
| 424 | usb_free_urb(urb); |
| 425 | es1->cport_out_urb[i] = NULL; |
| 426 | es1->cport_out_urb_busy[i] = false; /* just to be anal */ |
| 427 | } |
| 428 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 429 | for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) { |
| 430 | struct es1_cport_in *cport_in = &es1->cport_in[bulk_in]; |
| 431 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 432 | struct urb *urb = cport_in->urb[i]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 433 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 434 | if (!urb) |
| 435 | break; |
| 436 | usb_kill_urb(urb); |
| 437 | usb_free_urb(urb); |
| 438 | kfree(cport_in->buffer[i]); |
| 439 | cport_in->buffer[i] = NULL; |
| 440 | } |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 441 | } |
| 442 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 443 | usb_set_intfdata(interface, NULL); |
| 444 | udev = es1->usb_dev; |
| 445 | greybus_remove_hd(es1->hd); |
| 446 | |
| 447 | usb_put_dev(udev); |
| 448 | } |
| 449 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 450 | static void cport_in_callback(struct urb *urb) |
| 451 | { |
| 452 | struct greybus_host_device *hd = urb->context; |
| 453 | struct device *dev = &urb->dev->dev; |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 454 | struct gb_operation_msg_hdr *header; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 455 | int status = check_urb_status(urb); |
| 456 | int retval; |
| 457 | u16 cport_id; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 458 | |
| 459 | if (status) { |
| 460 | if ((status == -EAGAIN) || (status == -EPROTO)) |
| 461 | goto exit; |
| 462 | dev_err(dev, "urb cport in error %d (dropped)\n", status); |
| 463 | return; |
| 464 | } |
| 465 | |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 466 | if (urb->actual_length < sizeof(*header)) { |
| 467 | dev_err(dev, "%s: short message received\n", __func__); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 468 | goto exit; |
| 469 | } |
| 470 | |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 471 | /* Extract the CPort id, which is packed in the message header */ |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 472 | header = urb->transfer_buffer; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 473 | cport_id = gb_message_cport_unpack(header); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 474 | |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 475 | if (cport_id_valid(cport_id)) |
| 476 | greybus_data_rcvd(hd, cport_id, urb->transfer_buffer, |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 477 | urb->actual_length); |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 478 | else |
| 479 | dev_err(dev, "%s: invalid cport id 0x%02x received\n", |
| 480 | __func__, cport_id); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 481 | exit: |
| 482 | /* put our urb back in the request pool */ |
| 483 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
| 484 | if (retval) |
| 485 | dev_err(dev, "%s: error %d in submitting urb.\n", |
| 486 | __func__, retval); |
| 487 | } |
| 488 | |
| 489 | static void cport_out_callback(struct urb *urb) |
| 490 | { |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 491 | struct gb_message *message = urb->context; |
| 492 | struct greybus_host_device *hd = message->operation->connection->hd; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 493 | struct es1_ap_dev *es1 = hd_to_es1(hd); |
| 494 | int status = check_urb_status(urb); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 495 | unsigned long flags; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 496 | |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 497 | gb_message_cport_clear(message->header); |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 498 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 499 | /* |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 500 | * Tell the submitter that the message send (attempt) is |
| 501 | * complete, and report the status. |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 502 | */ |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 503 | greybus_message_sent(hd, message, status); |
| 504 | |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 505 | spin_lock_irqsave(&es1->cport_out_urb_lock, flags); |
| 506 | message->hcpriv = NULL; |
| 507 | spin_unlock_irqrestore(&es1->cport_out_urb_lock, flags); |
| 508 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 509 | free_urb(es1, urb); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 510 | } |
| 511 | |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 512 | #define APB1_LOG_MSG_SIZE 64 |
| 513 | static void apb1_log_get(struct es1_ap_dev *es1, char *buf) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 514 | { |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 515 | int retval; |
| 516 | |
| 517 | /* SVC messages go down our control pipe */ |
| 518 | do { |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 519 | retval = usb_control_msg(es1->usb_dev, |
| 520 | usb_rcvctrlpipe(es1->usb_dev, |
| 521 | es1->control_endpoint), |
Alexandre Bailon | 611c1739 | 2015-06-15 18:08:11 +0200 | [diff] [blame] | 522 | REQUEST_LOG, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 523 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
| 524 | 0x00, 0x00, |
| 525 | buf, |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 526 | APB1_LOG_MSG_SIZE, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 527 | ES1_TIMEOUT); |
| 528 | if (retval > 0) |
| 529 | kfifo_in(&apb1_log_fifo, buf, retval); |
| 530 | } while (retval > 0); |
| 531 | } |
| 532 | |
| 533 | static int apb1_log_poll(void *data) |
| 534 | { |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 535 | struct es1_ap_dev *es1 = data; |
| 536 | char *buf; |
| 537 | |
| 538 | buf = kmalloc(APB1_LOG_MSG_SIZE, GFP_KERNEL); |
| 539 | if (!buf) |
| 540 | return -ENOMEM; |
| 541 | |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 542 | while (!kthread_should_stop()) { |
| 543 | msleep(1000); |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 544 | apb1_log_get(es1, buf); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 545 | } |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 546 | |
| 547 | kfree(buf); |
| 548 | |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 549 | return 0; |
| 550 | } |
| 551 | |
| 552 | static ssize_t apb1_log_read(struct file *f, char __user *buf, |
| 553 | size_t count, loff_t *ppos) |
| 554 | { |
| 555 | ssize_t ret; |
| 556 | size_t copied; |
| 557 | char *tmp_buf; |
| 558 | |
| 559 | if (count > APB1_LOG_SIZE) |
| 560 | count = APB1_LOG_SIZE; |
| 561 | |
| 562 | tmp_buf = kmalloc(count, GFP_KERNEL); |
| 563 | if (!tmp_buf) |
| 564 | return -ENOMEM; |
| 565 | |
| 566 | copied = kfifo_out(&apb1_log_fifo, tmp_buf, count); |
| 567 | ret = simple_read_from_buffer(buf, count, ppos, tmp_buf, copied); |
| 568 | |
| 569 | kfree(tmp_buf); |
| 570 | |
| 571 | return ret; |
| 572 | } |
| 573 | |
| 574 | static const struct file_operations apb1_log_fops = { |
| 575 | .read = apb1_log_read, |
| 576 | }; |
| 577 | |
| 578 | static void usb_log_enable(struct es1_ap_dev *es1) |
| 579 | { |
Alex Elder | e0feaf1 | 2015-03-27 15:20:49 -0500 | [diff] [blame] | 580 | if (!IS_ERR_OR_NULL(apb1_log_task)) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 581 | return; |
| 582 | |
| 583 | /* get log from APB1 */ |
| 584 | apb1_log_task = kthread_run(apb1_log_poll, es1, "apb1_log"); |
Alex Elder | e0feaf1 | 2015-03-27 15:20:49 -0500 | [diff] [blame] | 585 | if (IS_ERR(apb1_log_task)) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 586 | return; |
| 587 | apb1_log_dentry = debugfs_create_file("apb1_log", S_IRUGO, |
| 588 | gb_debugfs_get(), NULL, |
| 589 | &apb1_log_fops); |
| 590 | } |
| 591 | |
| 592 | static void usb_log_disable(struct es1_ap_dev *es1) |
| 593 | { |
Alex Elder | e0feaf1 | 2015-03-27 15:20:49 -0500 | [diff] [blame] | 594 | if (IS_ERR_OR_NULL(apb1_log_task)) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 595 | return; |
| 596 | |
| 597 | debugfs_remove(apb1_log_dentry); |
| 598 | apb1_log_dentry = NULL; |
| 599 | |
| 600 | kthread_stop(apb1_log_task); |
| 601 | apb1_log_task = NULL; |
| 602 | } |
| 603 | |
| 604 | static ssize_t apb1_log_enable_read(struct file *f, char __user *buf, |
| 605 | size_t count, loff_t *ppos) |
| 606 | { |
| 607 | char tmp_buf[3]; |
Alex Elder | e0feaf1 | 2015-03-27 15:20:49 -0500 | [diff] [blame] | 608 | int enable = !IS_ERR_OR_NULL(apb1_log_task); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 609 | |
| 610 | sprintf(tmp_buf, "%d\n", enable); |
| 611 | return simple_read_from_buffer(buf, count, ppos, tmp_buf, 3); |
| 612 | } |
| 613 | |
| 614 | static ssize_t apb1_log_enable_write(struct file *f, const char __user *buf, |
| 615 | size_t count, loff_t *ppos) |
| 616 | { |
| 617 | int enable; |
| 618 | ssize_t retval; |
| 619 | struct es1_ap_dev *es1 = (struct es1_ap_dev *)f->f_inode->i_private; |
| 620 | |
| 621 | retval = kstrtoint_from_user(buf, count, 10, &enable); |
| 622 | if (retval) |
| 623 | return retval; |
| 624 | |
| 625 | if (enable) |
| 626 | usb_log_enable(es1); |
| 627 | else |
| 628 | usb_log_disable(es1); |
| 629 | |
| 630 | return count; |
| 631 | } |
| 632 | |
| 633 | static const struct file_operations apb1_log_enable_fops = { |
| 634 | .read = apb1_log_enable_read, |
| 635 | .write = apb1_log_enable_write, |
| 636 | }; |
| 637 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 638 | /* |
| 639 | * The ES1 USB Bridge device contains 4 endpoints |
| 640 | * 1 Control - usual USB stuff + AP -> SVC messages |
| 641 | * 1 Interrupt IN - SVC -> AP messages |
| 642 | * 1 Bulk IN - CPort data in |
| 643 | * 1 Bulk OUT - CPort data out |
| 644 | */ |
| 645 | static int ap_probe(struct usb_interface *interface, |
| 646 | const struct usb_device_id *id) |
| 647 | { |
| 648 | struct es1_ap_dev *es1; |
| 649 | struct greybus_host_device *hd; |
| 650 | struct usb_device *udev; |
| 651 | struct usb_host_interface *iface_desc; |
| 652 | struct usb_endpoint_descriptor *endpoint; |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 653 | int bulk_in = 0; |
| 654 | int bulk_out = 0; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 655 | int retval = -ENOMEM; |
| 656 | int i; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 657 | |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 658 | /* We need to fit a CPort ID in one byte of a message header */ |
| 659 | BUILD_BUG_ON(CPORT_ID_MAX > U8_MAX); |
| 660 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 661 | udev = usb_get_dev(interface_to_usbdev(interface)); |
| 662 | |
Johan Hovold | d933667 | 2015-05-19 11:22:43 +0200 | [diff] [blame] | 663 | hd = greybus_create_hd(&es1_driver, &udev->dev, ES1_GBUF_MSG_SIZE_MAX); |
Alex Elder | 8ea70fe | 2015-05-22 09:52:45 -0500 | [diff] [blame] | 664 | if (IS_ERR(hd)) { |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 665 | usb_put_dev(udev); |
Alex Elder | 8ea70fe | 2015-05-22 09:52:45 -0500 | [diff] [blame] | 666 | return PTR_ERR(hd); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 667 | } |
| 668 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 669 | es1 = hd_to_es1(hd); |
| 670 | es1->hd = hd; |
| 671 | es1->usb_intf = interface; |
| 672 | es1->usb_dev = udev; |
| 673 | spin_lock_init(&es1->cport_out_urb_lock); |
| 674 | usb_set_intfdata(interface, es1); |
| 675 | |
| 676 | /* Control endpoint is the pipe to talk to this AP, so save it off */ |
| 677 | endpoint = &udev->ep0.desc; |
| 678 | es1->control_endpoint = endpoint->bEndpointAddress; |
| 679 | |
| 680 | /* find all 3 of our endpoints */ |
| 681 | iface_desc = interface->cur_altsetting; |
| 682 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 683 | endpoint = &iface_desc->endpoint[i].desc; |
| 684 | |
Greg Kroah-Hartman | b767ee4 | 2015-07-24 17:09:48 -0700 | [diff] [blame] | 685 | if (usb_endpoint_is_bulk_in(endpoint)) { |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 686 | es1->cport_in[bulk_in++].endpoint = |
| 687 | endpoint->bEndpointAddress; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 688 | } else if (usb_endpoint_is_bulk_out(endpoint)) { |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 689 | es1->cport_out[bulk_out++].endpoint = |
| 690 | endpoint->bEndpointAddress; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 691 | } else { |
| 692 | dev_err(&udev->dev, |
| 693 | "Unknown endpoint type found, address %x\n", |
| 694 | endpoint->bEndpointAddress); |
| 695 | } |
| 696 | } |
Greg Kroah-Hartman | b767ee4 | 2015-07-24 17:09:48 -0700 | [diff] [blame] | 697 | if ((bulk_in == 0) || |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 698 | (bulk_out == 0)) { |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 699 | dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n"); |
| 700 | goto error; |
| 701 | } |
| 702 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 703 | /* Allocate buffers for our cport in messages and start them up */ |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 704 | for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) { |
| 705 | struct es1_cport_in *cport_in = &es1->cport_in[bulk_in]; |
| 706 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 707 | struct urb *urb; |
| 708 | u8 *buffer; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 709 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 710 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 711 | if (!urb) |
| 712 | goto error; |
| 713 | buffer = kmalloc(ES1_GBUF_MSG_SIZE_MAX, GFP_KERNEL); |
| 714 | if (!buffer) |
| 715 | goto error; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 716 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 717 | usb_fill_bulk_urb(urb, udev, |
| 718 | usb_rcvbulkpipe(udev, |
| 719 | cport_in->endpoint), |
| 720 | buffer, ES1_GBUF_MSG_SIZE_MAX, |
| 721 | cport_in_callback, hd); |
| 722 | cport_in->urb[i] = urb; |
| 723 | cport_in->buffer[i] = buffer; |
| 724 | retval = usb_submit_urb(urb, GFP_KERNEL); |
| 725 | if (retval) |
| 726 | goto error; |
| 727 | } |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 728 | } |
| 729 | |
| 730 | /* Allocate urbs for our CPort OUT messages */ |
| 731 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 732 | struct urb *urb; |
| 733 | |
| 734 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 735 | if (!urb) |
| 736 | goto error; |
| 737 | |
| 738 | es1->cport_out_urb[i] = urb; |
| 739 | es1->cport_out_urb_busy[i] = false; /* just to be anal */ |
| 740 | } |
| 741 | |
Johan Hovold | 86f918e | 2015-06-23 14:17:41 +0200 | [diff] [blame] | 742 | apb1_log_enable_dentry = debugfs_create_file("apb1_log_enable", |
| 743 | (S_IWUSR | S_IRUGO), |
| 744 | gb_debugfs_get(), es1, |
| 745 | &apb1_log_enable_fops); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 746 | return 0; |
| 747 | error: |
| 748 | ap_disconnect(interface); |
| 749 | |
| 750 | return retval; |
| 751 | } |
| 752 | |
| 753 | static struct usb_driver es1_ap_driver = { |
Rob Herring | c13c8bf | 2015-05-05 11:04:22 -0500 | [diff] [blame] | 754 | .name = "es2_ap_driver", |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 755 | .probe = ap_probe, |
| 756 | .disconnect = ap_disconnect, |
| 757 | .id_table = id_table, |
| 758 | }; |
| 759 | |
| 760 | module_usb_driver(es1_ap_driver); |
| 761 | |
Greg Kroah-Hartman | 6cf42a4 | 2015-04-13 19:51:33 +0200 | [diff] [blame] | 762 | MODULE_LICENSE("GPL v2"); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 763 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |