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" |
Bryan O'Donoghue | 6872c46 | 2015-09-22 18:06:39 -0700 | [diff] [blame] | 19 | #include "greybus_trace.h" |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 20 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 21 | /* Memory sizes for the buffers sent to/from the ES2 controller */ |
| 22 | #define ES2_GBUF_MSG_SIZE_MAX 2048 |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 23 | |
| 24 | static const struct usb_device_id id_table[] = { |
Greg Kroah-Hartman | 8f0a654 | 2015-10-22 16:40:41 -0700 | [diff] [blame] | 25 | { USB_DEVICE(0x18d1, 0x1eaf) }, |
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 |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 31 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 32 | /* Number of bulk in and bulk out couple */ |
| 33 | #define NUM_BULKS 7 |
| 34 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 35 | /* |
| 36 | * Number of CPort IN urbs in flight at any point in time. |
| 37 | * Adjust if we are having stalls in the USB buffer due to not enough urbs in |
| 38 | * flight. |
| 39 | */ |
| 40 | #define NUM_CPORT_IN_URB 4 |
| 41 | |
| 42 | /* Number of CPort OUT urbs in flight at any point in time. |
| 43 | * Adjust if we get messages saying we are out of urbs in the system log. |
| 44 | */ |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 45 | #define NUM_CPORT_OUT_URB (8 * NUM_BULKS) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 46 | |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 47 | /* |
| 48 | * @endpoint: bulk in endpoint for CPort data |
| 49 | * @urb: array of urbs for the CPort in messages |
| 50 | * @buffer: array of buffers for the @cport_in_urb urbs |
| 51 | */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 52 | struct es2_cport_in { |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 53 | __u8 endpoint; |
| 54 | struct urb *urb[NUM_CPORT_IN_URB]; |
| 55 | u8 *buffer[NUM_CPORT_IN_URB]; |
| 56 | }; |
| 57 | |
| 58 | /* |
| 59 | * @endpoint: bulk out endpoint for CPort data |
| 60 | */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 61 | struct es2_cport_out { |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 62 | __u8 endpoint; |
| 63 | }; |
| 64 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 65 | /** |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 66 | * es2_ap_dev - ES2 USB Bridge to AP structure |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 67 | * @usb_dev: pointer to the USB device we are. |
| 68 | * @usb_intf: pointer to the USB interface we are bound to. |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 69 | * @hd: pointer to our gb_host_device structure |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 70 | |
Alexandre Bailon | ddc09ac | 2015-06-15 18:08:12 +0200 | [diff] [blame] | 71 | * @cport_in: endpoint, urbs and buffer for cport in messages |
| 72 | * @cport_out: endpoint for for cport out messages |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 73 | * @cport_out_urb: array of urbs for the CPort out messages |
| 74 | * @cport_out_urb_busy: array of flags to see if the @cport_out_urb is busy or |
| 75 | * not. |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 76 | * @cport_out_urb_cancelled: array of flags indicating whether the |
| 77 | * corresponding @cport_out_urb is being cancelled |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 78 | * @cport_out_urb_lock: locks the @cport_out_urb_busy "list" |
Alex Elder | 1482b3e | 2015-10-27 22:18:38 -0500 | [diff] [blame] | 79 | * |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 80 | * @apb_log_task: task pointer for logging thread |
| 81 | * @apb_log_dentry: file system entry for the log file interface |
| 82 | * @apb_log_enable_dentry: file system entry for enabling logging |
| 83 | * @apb_log_fifo: kernel FIFO to carry logged data |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 84 | */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 85 | struct es2_ap_dev { |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 86 | struct usb_device *usb_dev; |
| 87 | struct usb_interface *usb_intf; |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 88 | struct gb_host_device *hd; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 89 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 90 | struct es2_cport_in cport_in[NUM_BULKS]; |
| 91 | struct es2_cport_out cport_out[NUM_BULKS]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 92 | struct urb *cport_out_urb[NUM_CPORT_OUT_URB]; |
| 93 | bool cport_out_urb_busy[NUM_CPORT_OUT_URB]; |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 94 | bool cport_out_urb_cancelled[NUM_CPORT_OUT_URB]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 95 | spinlock_t cport_out_urb_lock; |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 96 | |
Fabien Parent | c011d55 | 2015-09-02 15:50:36 +0200 | [diff] [blame] | 97 | int *cport_to_ep; |
Alex Elder | 1482b3e | 2015-10-27 22:18:38 -0500 | [diff] [blame] | 98 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 99 | struct task_struct *apb_log_task; |
| 100 | struct dentry *apb_log_dentry; |
| 101 | struct dentry *apb_log_enable_dentry; |
| 102 | DECLARE_KFIFO(apb_log_fifo, char, APB1_LOG_SIZE); |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 103 | }; |
| 104 | |
Alexandre Bailon | e5acf73 | 2015-09-14 18:20:44 +0200 | [diff] [blame] | 105 | /** |
| 106 | * cport_to_ep - information about cport to endpoints mapping |
| 107 | * @cport_id: the id of cport to map to endpoints |
| 108 | * @endpoint_in: the endpoint number to use for in transfer |
| 109 | * @endpoint_out: he endpoint number to use for out transfer |
| 110 | */ |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 111 | struct cport_to_ep { |
| 112 | __le16 cport_id; |
| 113 | __u8 endpoint_in; |
| 114 | __u8 endpoint_out; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 115 | }; |
| 116 | |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 117 | static inline struct es2_ap_dev *hd_to_es2(struct gb_host_device *hd) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 118 | { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 119 | return (struct es2_ap_dev *)&hd->hd_priv; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | static void cport_out_callback(struct urb *urb); |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 123 | static void usb_log_enable(struct es2_ap_dev *es2); |
| 124 | static void usb_log_disable(struct es2_ap_dev *es2); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 125 | |
Alexandre Bailon | e5acf73 | 2015-09-14 18:20:44 +0200 | [diff] [blame] | 126 | /* Get the endpoints pair mapped to the cport */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 127 | static int cport_to_ep_pair(struct es2_ap_dev *es2, u16 cport_id) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 128 | { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 129 | if (cport_id >= es2->hd->num_cports) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 130 | return 0; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 131 | return es2->cport_to_ep[cport_id]; |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 132 | } |
| 133 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 134 | #define ES2_TIMEOUT 500 /* 500 ms for the SVC to do something */ |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 135 | |
Greg Kroah-Hartman | 608f661 | 2015-09-22 09:42:52 -0700 | [diff] [blame] | 136 | /* Disable for now until we work all of this out to keep a warning-free build */ |
| 137 | #if 0 |
Alexandre Bailon | e5acf73 | 2015-09-14 18:20:44 +0200 | [diff] [blame] | 138 | /* Test if the endpoints pair is already mapped to a cport */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 139 | static int ep_pair_in_use(struct es2_ap_dev *es2, int ep_pair) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 140 | { |
| 141 | int i; |
| 142 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 143 | for (i = 0; i < es2->hd->num_cports; i++) { |
| 144 | if (es2->cport_to_ep[i] == ep_pair) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 145 | return 1; |
| 146 | } |
| 147 | return 0; |
| 148 | } |
| 149 | |
Alexandre Bailon | e5acf73 | 2015-09-14 18:20:44 +0200 | [diff] [blame] | 150 | /* Configure the endpoint mapping and send the request to APBridge */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 151 | static int map_cport_to_ep(struct es2_ap_dev *es2, |
Alexandre Bailon | 1ff3dc9 | 2015-09-14 18:20:42 +0200 | [diff] [blame] | 152 | u16 cport_id, int ep_pair) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 153 | { |
| 154 | int retval; |
| 155 | struct cport_to_ep *cport_to_ep; |
| 156 | |
Alexandre Bailon | 1ff3dc9 | 2015-09-14 18:20:42 +0200 | [diff] [blame] | 157 | if (ep_pair < 0 || ep_pair >= NUM_BULKS) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 158 | return -EINVAL; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 159 | if (cport_id >= es2->hd->num_cports) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 160 | return -EINVAL; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 161 | if (ep_pair && ep_pair_in_use(es2, ep_pair)) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 162 | return -EINVAL; |
| 163 | |
| 164 | cport_to_ep = kmalloc(sizeof(*cport_to_ep), GFP_KERNEL); |
| 165 | if (!cport_to_ep) |
| 166 | return -ENOMEM; |
| 167 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 168 | es2->cport_to_ep[cport_id] = ep_pair; |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 169 | cport_to_ep->cport_id = cpu_to_le16(cport_id); |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 170 | cport_to_ep->endpoint_in = es2->cport_in[ep_pair].endpoint; |
| 171 | cport_to_ep->endpoint_out = es2->cport_out[ep_pair].endpoint; |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 172 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 173 | retval = usb_control_msg(es2->usb_dev, |
| 174 | usb_sndctrlpipe(es2->usb_dev, 0), |
Greg Kroah-Hartman | e527338 | 2015-12-31 11:14:33 -0800 | [diff] [blame] | 175 | GB_APB_REQUEST_EP_MAPPING, |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 176 | USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
| 177 | 0x00, 0x00, |
| 178 | (char *)cport_to_ep, |
| 179 | sizeof(*cport_to_ep), |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 180 | ES2_TIMEOUT); |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 181 | if (retval == sizeof(*cport_to_ep)) |
| 182 | retval = 0; |
| 183 | kfree(cport_to_ep); |
| 184 | |
| 185 | return retval; |
| 186 | } |
| 187 | |
Alexandre Bailon | e5acf73 | 2015-09-14 18:20:44 +0200 | [diff] [blame] | 188 | /* Unmap a cport: use the muxed endpoints pair */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 189 | static int unmap_cport(struct es2_ap_dev *es2, u16 cport_id) |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 190 | { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 191 | return map_cport_to_ep(es2, cport_id, 0); |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 192 | } |
Greg Kroah-Hartman | 608f661 | 2015-09-22 09:42:52 -0700 | [diff] [blame] | 193 | #endif |
Alexandre Bailon | fc1a536 | 2015-06-15 18:08:14 +0200 | [diff] [blame] | 194 | |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 195 | static int output_sync(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd) |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 196 | { |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 197 | struct usb_device *udev = es2->usb_dev; |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 198 | u8 *data; |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 199 | int retval; |
| 200 | |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 201 | data = kmalloc(size, GFP_KERNEL); |
| 202 | if (!data) |
Laurent Pinchart | ccb5803 | 2015-12-22 03:00:37 +0200 | [diff] [blame] | 203 | return -ENOMEM; |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 204 | memcpy(data, req, size); |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 205 | |
| 206 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 207 | cmd, |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 208 | USB_DIR_OUT | USB_TYPE_VENDOR | |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 209 | USB_RECIP_INTERFACE, |
| 210 | 0, 0, data, size, ES2_TIMEOUT); |
Laurent Pinchart | ccb5803 | 2015-12-22 03:00:37 +0200 | [diff] [blame] | 211 | if (retval < 0) |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 212 | dev_err(&udev->dev, "%s: return error %d\n", __func__, retval); |
| 213 | else |
| 214 | retval = 0; |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 215 | |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 216 | kfree(data); |
Laurent Pinchart | ccb5803 | 2015-12-22 03:00:37 +0200 | [diff] [blame] | 217 | return retval; |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 218 | } |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 219 | |
| 220 | static void ap_urb_complete(struct urb *urb) |
| 221 | { |
| 222 | struct usb_ctrlrequest *dr = urb->context; |
| 223 | |
| 224 | kfree(dr); |
| 225 | usb_free_urb(urb); |
| 226 | } |
| 227 | |
| 228 | static int output_async(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd) |
| 229 | { |
| 230 | struct usb_device *udev = es2->usb_dev; |
| 231 | struct urb *urb; |
| 232 | struct usb_ctrlrequest *dr; |
| 233 | u8 *buf; |
| 234 | int retval; |
| 235 | |
| 236 | urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 237 | if (!urb) |
| 238 | return -ENOMEM; |
| 239 | |
| 240 | dr = kmalloc(sizeof(*dr) + size, GFP_ATOMIC); |
| 241 | if (!dr) { |
| 242 | usb_free_urb(urb); |
| 243 | return -ENOMEM; |
| 244 | } |
| 245 | |
| 246 | buf = (u8 *)dr + sizeof(*dr); |
| 247 | memcpy(buf, req, size); |
| 248 | |
| 249 | dr->bRequest = cmd; |
| 250 | dr->bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE; |
| 251 | dr->wValue = 0; |
| 252 | dr->wIndex = 0; |
| 253 | dr->wLength = cpu_to_le16(size); |
| 254 | |
| 255 | usb_fill_control_urb(urb, udev, usb_sndctrlpipe(udev, 0), |
| 256 | (unsigned char *)dr, buf, size, |
| 257 | ap_urb_complete, dr); |
| 258 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
| 259 | if (retval) { |
| 260 | usb_free_urb(urb); |
| 261 | kfree(dr); |
| 262 | } |
| 263 | return retval; |
| 264 | } |
| 265 | |
| 266 | static int output(struct gb_host_device *hd, void *req, u16 size, u8 cmd, |
| 267 | bool async) |
| 268 | { |
| 269 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
| 270 | |
| 271 | if (async) |
| 272 | return output_async(es2, req, size, cmd); |
| 273 | |
| 274 | return output_sync(es2, req, size, cmd); |
| 275 | } |
Laurent Pinchart | 8e2b7da | 2015-12-18 21:23:24 +0200 | [diff] [blame] | 276 | |
Johan Hovold | 0ce68ce4 | 2015-11-04 18:55:14 +0100 | [diff] [blame] | 277 | static int es2_cport_in_enable(struct es2_ap_dev *es2, |
| 278 | struct es2_cport_in *cport_in) |
| 279 | { |
| 280 | struct urb *urb; |
| 281 | int ret; |
| 282 | int i; |
| 283 | |
| 284 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 285 | urb = cport_in->urb[i]; |
| 286 | |
| 287 | ret = usb_submit_urb(urb, GFP_KERNEL); |
| 288 | if (ret) { |
| 289 | dev_err(&es2->usb_dev->dev, |
| 290 | "failed to submit in-urb: %d\n", ret); |
| 291 | goto err_kill_urbs; |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | return 0; |
| 296 | |
| 297 | err_kill_urbs: |
| 298 | for (--i; i >= 0; --i) { |
| 299 | urb = cport_in->urb[i]; |
| 300 | usb_kill_urb(urb); |
| 301 | } |
| 302 | |
| 303 | return ret; |
| 304 | } |
| 305 | |
Johan Hovold | f6624ca | 2015-11-04 18:55:16 +0100 | [diff] [blame] | 306 | static void es2_cport_in_disable(struct es2_ap_dev *es2, |
| 307 | struct es2_cport_in *cport_in) |
| 308 | { |
| 309 | struct urb *urb; |
| 310 | int i; |
| 311 | |
| 312 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 313 | urb = cport_in->urb[i]; |
| 314 | usb_kill_urb(urb); |
| 315 | } |
| 316 | } |
| 317 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 318 | static struct urb *next_free_urb(struct es2_ap_dev *es2, gfp_t gfp_mask) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 319 | { |
| 320 | struct urb *urb = NULL; |
| 321 | unsigned long flags; |
| 322 | int i; |
| 323 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 324 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 325 | |
| 326 | /* Look in our pool of allocated urbs first, as that's the "fastest" */ |
| 327 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 328 | if (es2->cport_out_urb_busy[i] == false && |
| 329 | es2->cport_out_urb_cancelled[i] == false) { |
| 330 | es2->cport_out_urb_busy[i] = true; |
| 331 | urb = es2->cport_out_urb[i]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 332 | break; |
| 333 | } |
| 334 | } |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 335 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 336 | if (urb) |
| 337 | return urb; |
| 338 | |
| 339 | /* |
| 340 | * Crap, pool is empty, complain to the syslog and go allocate one |
| 341 | * dynamically as we have to succeed. |
| 342 | */ |
Johan Hovold | ed972e3 | 2015-12-15 15:51:48 +0100 | [diff] [blame] | 343 | dev_dbg(&es2->usb_dev->dev, |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 344 | "No free CPort OUT urbs, having to dynamically allocate one!\n"); |
| 345 | return usb_alloc_urb(0, gfp_mask); |
| 346 | } |
| 347 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 348 | static void free_urb(struct es2_ap_dev *es2, struct urb *urb) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 349 | { |
| 350 | unsigned long flags; |
| 351 | int i; |
| 352 | /* |
| 353 | * See if this was an urb in our pool, if so mark it "free", otherwise |
| 354 | * we need to free it ourselves. |
| 355 | */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 356 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 357 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 358 | if (urb == es2->cport_out_urb[i]) { |
| 359 | es2->cport_out_urb_busy[i] = false; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 360 | urb = NULL; |
| 361 | break; |
| 362 | } |
| 363 | } |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 364 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 365 | |
| 366 | /* If urb is not NULL, then we need to free this urb */ |
| 367 | usb_free_urb(urb); |
| 368 | } |
| 369 | |
| 370 | /* |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 371 | * We (ab)use the operation-message header pad bytes to transfer the |
| 372 | * cport id in order to minimise overhead. |
| 373 | */ |
| 374 | static void |
| 375 | gb_message_cport_pack(struct gb_operation_msg_hdr *header, u16 cport_id) |
| 376 | { |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 377 | header->pad[0] = cport_id; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | /* Clear the pad bytes used for the CPort id */ |
| 381 | static void gb_message_cport_clear(struct gb_operation_msg_hdr *header) |
| 382 | { |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 383 | header->pad[0] = 0; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | /* Extract the CPort id packed into the header, and clear it */ |
| 387 | static u16 gb_message_cport_unpack(struct gb_operation_msg_hdr *header) |
| 388 | { |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 389 | u16 cport_id = header->pad[0]; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 390 | |
| 391 | gb_message_cport_clear(header); |
| 392 | |
| 393 | return cport_id; |
| 394 | } |
| 395 | |
| 396 | /* |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 397 | * Returns zero if the message was successfully queued, or a negative errno |
| 398 | * otherwise. |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 399 | */ |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 400 | static int message_send(struct gb_host_device *hd, u16 cport_id, |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 401 | struct gb_message *message, gfp_t gfp_mask) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 402 | { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 403 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
| 404 | struct usb_device *udev = es2->usb_dev; |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 405 | size_t buffer_size; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 406 | int retval; |
| 407 | struct urb *urb; |
Alexandre Bailon | 1ff3dc9 | 2015-09-14 18:20:42 +0200 | [diff] [blame] | 408 | int ep_pair; |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 409 | unsigned long flags; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 410 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 411 | /* |
| 412 | * The data actually transferred will include an indication |
| 413 | * of where the data should be sent. Do one last check of |
| 414 | * the target CPort id before filling it in. |
| 415 | */ |
Fabien Parent | 144670c | 2015-09-02 15:50:35 +0200 | [diff] [blame] | 416 | if (!cport_id_valid(hd, cport_id)) { |
Johan Hovold | 100e900 | 2015-12-07 15:05:38 +0100 | [diff] [blame] | 417 | dev_err(&udev->dev, "invalid cport %u\n", cport_id); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 418 | return -EINVAL; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 419 | } |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 420 | |
| 421 | /* Find a free urb */ |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 422 | urb = next_free_urb(es2, gfp_mask); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 423 | if (!urb) |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 424 | return -ENOMEM; |
| 425 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 426 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 427 | message->hcpriv = urb; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 428 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 429 | |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 430 | /* Pack the cport id into the message header */ |
| 431 | gb_message_cport_pack(message->header, cport_id); |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 432 | |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 433 | buffer_size = sizeof(*message->header) + message->payload_size; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 434 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 435 | ep_pair = cport_to_ep_pair(es2, cport_id); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 436 | usb_fill_bulk_urb(urb, udev, |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 437 | usb_sndbulkpipe(udev, |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 438 | es2->cport_out[ep_pair].endpoint), |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 439 | message->buffer, buffer_size, |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 440 | cport_out_callback, message); |
Alexandre Bailon | 977e209 | 2015-08-31 09:00:16 +0200 | [diff] [blame] | 441 | urb->transfer_flags |= URB_ZERO_PACKET; |
Bryan O'Donoghue | 6872c46 | 2015-09-22 18:06:39 -0700 | [diff] [blame] | 442 | trace_gb_host_device_send(hd, cport_id, buffer_size); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 443 | retval = usb_submit_urb(urb, gfp_mask); |
| 444 | if (retval) { |
Johan Hovold | 305a031 | 2015-10-13 19:10:20 +0200 | [diff] [blame] | 445 | dev_err(&udev->dev, "failed to submit out-urb: %d\n", retval); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 446 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 447 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 448 | message->hcpriv = NULL; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 449 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 450 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 451 | free_urb(es2, urb); |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 452 | gb_message_cport_clear(message->header); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 453 | |
| 454 | return retval; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 455 | } |
| 456 | |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 457 | return 0; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | /* |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 461 | * Can not be called in atomic context. |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 462 | */ |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 463 | static void message_cancel(struct gb_message *message) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 464 | { |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 465 | struct gb_host_device *hd = message->operation->connection->hd; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 466 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 467 | struct urb *urb; |
| 468 | int i; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 469 | |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 470 | might_sleep(); |
| 471 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 472 | spin_lock_irq(&es2->cport_out_urb_lock); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 473 | urb = message->hcpriv; |
| 474 | |
| 475 | /* Prevent dynamically allocated urb from being deallocated. */ |
| 476 | usb_get_urb(urb); |
| 477 | |
| 478 | /* Prevent pre-allocated urb from being reused. */ |
| 479 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 480 | if (urb == es2->cport_out_urb[i]) { |
| 481 | es2->cport_out_urb_cancelled[i] = true; |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 482 | break; |
| 483 | } |
| 484 | } |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 485 | spin_unlock_irq(&es2->cport_out_urb_lock); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 486 | |
| 487 | usb_kill_urb(urb); |
| 488 | |
| 489 | if (i < NUM_CPORT_OUT_URB) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 490 | spin_lock_irq(&es2->cport_out_urb_lock); |
| 491 | es2->cport_out_urb_cancelled[i] = false; |
| 492 | spin_unlock_irq(&es2->cport_out_urb_lock); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | usb_free_urb(urb); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 496 | } |
| 497 | |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 498 | static int cport_reset(struct gb_host_device *hd, u16 cport_id) |
Fabien Parent | 82ee1e6 | 2015-10-13 17:34:50 +0200 | [diff] [blame] | 499 | { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 500 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
| 501 | struct usb_device *udev = es2->usb_dev; |
Fabien Parent | 82ee1e6 | 2015-10-13 17:34:50 +0200 | [diff] [blame] | 502 | int retval; |
| 503 | |
| 504 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
Greg Kroah-Hartman | e527338 | 2015-12-31 11:14:33 -0800 | [diff] [blame] | 505 | GB_APB_REQUEST_RESET_CPORT, |
Fabien Parent | 82ee1e6 | 2015-10-13 17:34:50 +0200 | [diff] [blame] | 506 | USB_DIR_OUT | USB_TYPE_VENDOR | |
Viresh Kumar | 69166d2 | 2015-11-09 15:05:03 +0530 | [diff] [blame] | 507 | USB_RECIP_INTERFACE, cport_id, 0, |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 508 | NULL, 0, ES2_TIMEOUT); |
Fabien Parent | 82ee1e6 | 2015-10-13 17:34:50 +0200 | [diff] [blame] | 509 | if (retval < 0) { |
Viresh Kumar | 2f3db92 | 2015-12-04 21:30:09 +0530 | [diff] [blame] | 510 | dev_err(&udev->dev, "failed to reset cport %u: %d\n", cport_id, |
Fabien Parent | 82ee1e6 | 2015-10-13 17:34:50 +0200 | [diff] [blame] | 511 | retval); |
| 512 | return retval; |
| 513 | } |
| 514 | |
| 515 | return 0; |
| 516 | } |
| 517 | |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 518 | static int cport_enable(struct gb_host_device *hd, u16 cport_id) |
Fabien Parent | 82ee1e6 | 2015-10-13 17:34:50 +0200 | [diff] [blame] | 519 | { |
| 520 | int retval; |
| 521 | |
| 522 | if (cport_id != GB_SVC_CPORT_ID) { |
| 523 | retval = cport_reset(hd, cport_id); |
| 524 | if (retval) |
| 525 | return retval; |
| 526 | } |
| 527 | |
| 528 | return 0; |
| 529 | } |
| 530 | |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 531 | static int latency_tag_enable(struct gb_host_device *hd, u16 cport_id) |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 532 | { |
| 533 | int retval; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 534 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
| 535 | struct usb_device *udev = es2->usb_dev; |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 536 | |
| 537 | if (!cport_id_valid(hd, cport_id)) { |
Johan Hovold | 100e900 | 2015-12-07 15:05:38 +0100 | [diff] [blame] | 538 | dev_err(&udev->dev, "invalid cport %u\n", cport_id); |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 539 | return -EINVAL; |
| 540 | } |
| 541 | |
| 542 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
Greg Kroah-Hartman | e527338 | 2015-12-31 11:14:33 -0800 | [diff] [blame] | 543 | GB_APB_REQUEST_LATENCY_TAG_EN, |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 544 | USB_DIR_OUT | USB_TYPE_VENDOR | |
| 545 | USB_RECIP_INTERFACE, cport_id, 0, NULL, |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 546 | 0, ES2_TIMEOUT); |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 547 | |
| 548 | if (retval < 0) |
| 549 | dev_err(&udev->dev, "Cannot enable latency tag for cport %d\n", |
| 550 | cport_id); |
| 551 | return retval; |
| 552 | } |
| 553 | |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 554 | static int latency_tag_disable(struct gb_host_device *hd, u16 cport_id) |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 555 | { |
| 556 | int retval; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 557 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
| 558 | struct usb_device *udev = es2->usb_dev; |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 559 | |
| 560 | if (!cport_id_valid(hd, cport_id)) { |
Johan Hovold | 100e900 | 2015-12-07 15:05:38 +0100 | [diff] [blame] | 561 | dev_err(&udev->dev, "invalid cport %u\n", cport_id); |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 562 | return -EINVAL; |
| 563 | } |
| 564 | |
| 565 | retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
Greg Kroah-Hartman | e527338 | 2015-12-31 11:14:33 -0800 | [diff] [blame] | 566 | GB_APB_REQUEST_LATENCY_TAG_DIS, |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 567 | USB_DIR_OUT | USB_TYPE_VENDOR | |
| 568 | USB_RECIP_INTERFACE, cport_id, 0, NULL, |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 569 | 0, ES2_TIMEOUT); |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 570 | |
| 571 | if (retval < 0) |
| 572 | dev_err(&udev->dev, "Cannot disable latency tag for cport %d\n", |
| 573 | cport_id); |
| 574 | return retval; |
| 575 | } |
| 576 | |
Johan Hovold | a8cc020 | 2015-11-03 18:03:24 +0100 | [diff] [blame] | 577 | static struct gb_hd_driver es2_driver = { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 578 | .hd_priv_size = sizeof(struct es2_ap_dev), |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 579 | .message_send = message_send, |
| 580 | .message_cancel = message_cancel, |
Fabien Parent | 82ee1e6 | 2015-10-13 17:34:50 +0200 | [diff] [blame] | 581 | .cport_enable = cport_enable, |
Bryan O'Donoghue | 608ab2f | 2015-10-15 16:10:41 +0100 | [diff] [blame] | 582 | .latency_tag_enable = latency_tag_enable, |
| 583 | .latency_tag_disable = latency_tag_disable, |
Greg Kroah-Hartman | ed4596e9 | 2015-12-22 18:21:51 -0800 | [diff] [blame] | 584 | .output = output, |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 585 | }; |
| 586 | |
| 587 | /* Common function to report consistent warnings based on URB status */ |
| 588 | static int check_urb_status(struct urb *urb) |
| 589 | { |
| 590 | struct device *dev = &urb->dev->dev; |
| 591 | int status = urb->status; |
| 592 | |
| 593 | switch (status) { |
| 594 | case 0: |
| 595 | return 0; |
| 596 | |
| 597 | case -EOVERFLOW: |
| 598 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 599 | __func__, urb->actual_length); |
| 600 | case -ECONNRESET: |
| 601 | case -ENOENT: |
| 602 | case -ESHUTDOWN: |
| 603 | case -EILSEQ: |
| 604 | case -EPROTO: |
| 605 | /* device is gone, stop sending */ |
| 606 | return status; |
| 607 | } |
| 608 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 609 | |
| 610 | return -EAGAIN; |
| 611 | } |
| 612 | |
Johan Hovold | 57bc17f | 2015-11-04 18:55:20 +0100 | [diff] [blame] | 613 | static void es2_destroy(struct es2_ap_dev *es2) |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 614 | { |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 615 | struct usb_device *udev; |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 616 | int bulk_in; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 617 | int i; |
| 618 | |
Johan Hovold | 74cd650 | 2015-11-04 18:55:18 +0100 | [diff] [blame] | 619 | debugfs_remove(es2->apb_log_enable_dentry); |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 620 | usb_log_disable(es2); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 621 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 622 | /* Tear down everything! */ |
| 623 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 624 | struct urb *urb = es2->cport_out_urb[i]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 625 | |
| 626 | if (!urb) |
| 627 | break; |
| 628 | usb_kill_urb(urb); |
| 629 | usb_free_urb(urb); |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 630 | es2->cport_out_urb[i] = NULL; |
| 631 | es2->cport_out_urb_busy[i] = false; /* just to be anal */ |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 632 | } |
| 633 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 634 | for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 635 | struct es2_cport_in *cport_in = &es2->cport_in[bulk_in]; |
| 636 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 637 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 638 | struct urb *urb = cport_in->urb[i]; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 639 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 640 | if (!urb) |
| 641 | break; |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 642 | usb_free_urb(urb); |
| 643 | kfree(cport_in->buffer[i]); |
| 644 | cport_in->buffer[i] = NULL; |
| 645 | } |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 646 | } |
| 647 | |
Johan Hovold | a520286 | 2015-11-04 18:55:23 +0100 | [diff] [blame] | 648 | kfree(es2->cport_to_ep); |
| 649 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 650 | udev = es2->usb_dev; |
Johan Hovold | c170047 | 2015-11-04 18:55:22 +0100 | [diff] [blame] | 651 | gb_hd_put(es2->hd); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 652 | |
| 653 | usb_put_dev(udev); |
| 654 | } |
| 655 | |
Johan Hovold | 57bc17f | 2015-11-04 18:55:20 +0100 | [diff] [blame] | 656 | static void ap_disconnect(struct usb_interface *interface) |
| 657 | { |
| 658 | struct es2_ap_dev *es2 = usb_get_intfdata(interface); |
| 659 | int i; |
| 660 | |
| 661 | for (i = 0; i < NUM_BULKS; ++i) |
| 662 | es2_cport_in_disable(es2, &es2->cport_in[i]); |
| 663 | |
Johan Hovold | c170047 | 2015-11-04 18:55:22 +0100 | [diff] [blame] | 664 | gb_hd_del(es2->hd); |
| 665 | |
Johan Hovold | 57bc17f | 2015-11-04 18:55:20 +0100 | [diff] [blame] | 666 | es2_destroy(es2); |
| 667 | } |
| 668 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 669 | static void cport_in_callback(struct urb *urb) |
| 670 | { |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 671 | struct gb_host_device *hd = urb->context; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 672 | struct device *dev = &urb->dev->dev; |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 673 | struct gb_operation_msg_hdr *header; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 674 | int status = check_urb_status(urb); |
| 675 | int retval; |
| 676 | u16 cport_id; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 677 | |
| 678 | if (status) { |
| 679 | if ((status == -EAGAIN) || (status == -EPROTO)) |
| 680 | goto exit; |
| 681 | dev_err(dev, "urb cport in error %d (dropped)\n", status); |
| 682 | return; |
| 683 | } |
| 684 | |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 685 | if (urb->actual_length < sizeof(*header)) { |
Johan Hovold | 305a031 | 2015-10-13 19:10:20 +0200 | [diff] [blame] | 686 | dev_err(dev, "short message received\n"); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 687 | goto exit; |
| 688 | } |
| 689 | |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 690 | /* Extract the CPort id, which is packed in the message header */ |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 691 | header = urb->transfer_buffer; |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 692 | cport_id = gb_message_cport_unpack(header); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 693 | |
Bryan O'Donoghue | 6872c46 | 2015-09-22 18:06:39 -0700 | [diff] [blame] | 694 | if (cport_id_valid(hd, cport_id)) { |
| 695 | trace_gb_host_device_recv(hd, cport_id, urb->actual_length); |
Alex Elder | 821c620 | 2015-06-13 11:02:07 -0500 | [diff] [blame] | 696 | greybus_data_rcvd(hd, cport_id, urb->transfer_buffer, |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 697 | urb->actual_length); |
Bryan O'Donoghue | 6872c46 | 2015-09-22 18:06:39 -0700 | [diff] [blame] | 698 | } else { |
Johan Hovold | 100e900 | 2015-12-07 15:05:38 +0100 | [diff] [blame] | 699 | dev_err(dev, "invalid cport id %u received\n", cport_id); |
Bryan O'Donoghue | 6872c46 | 2015-09-22 18:06:39 -0700 | [diff] [blame] | 700 | } |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 701 | exit: |
| 702 | /* put our urb back in the request pool */ |
| 703 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
| 704 | if (retval) |
Johan Hovold | 305a031 | 2015-10-13 19:10:20 +0200 | [diff] [blame] | 705 | dev_err(dev, "failed to resubmit in-urb: %d\n", retval); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 706 | } |
| 707 | |
| 708 | static void cport_out_callback(struct urb *urb) |
| 709 | { |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 710 | struct gb_message *message = urb->context; |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 711 | struct gb_host_device *hd = message->operation->connection->hd; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 712 | struct es2_ap_dev *es2 = hd_to_es2(hd); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 713 | int status = check_urb_status(urb); |
Johan Hovold | 3e136cc | 2015-07-01 12:37:21 +0200 | [diff] [blame] | 714 | unsigned long flags; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 715 | |
Alex Elder | d29b3d6 | 2015-06-13 11:02:08 -0500 | [diff] [blame] | 716 | gb_message_cport_clear(message->header); |
Johan Hovold | 491e60d | 2015-04-07 11:27:20 +0200 | [diff] [blame] | 717 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 718 | spin_lock_irqsave(&es2->cport_out_urb_lock, flags); |
Johan Hovold | 58c8512 | 2015-09-26 14:37:59 -0700 | [diff] [blame] | 719 | message->hcpriv = NULL; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 720 | spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags); |
Johan Hovold | 58c8512 | 2015-09-26 14:37:59 -0700 | [diff] [blame] | 721 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 722 | /* |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 723 | * Tell the submitter that the message send (attempt) is |
| 724 | * complete, and report the status. |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 725 | */ |
Johan Hovold | 7cf7bca | 2015-04-07 11:27:16 +0200 | [diff] [blame] | 726 | greybus_message_sent(hd, message, status); |
| 727 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 728 | free_urb(es2, urb); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 729 | } |
| 730 | |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 731 | #define APB1_LOG_MSG_SIZE 64 |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 732 | static void apb_log_get(struct es2_ap_dev *es2, char *buf) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 733 | { |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 734 | int retval; |
| 735 | |
| 736 | /* SVC messages go down our control pipe */ |
| 737 | do { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 738 | retval = usb_control_msg(es2->usb_dev, |
| 739 | usb_rcvctrlpipe(es2->usb_dev, 0), |
Greg Kroah-Hartman | e527338 | 2015-12-31 11:14:33 -0800 | [diff] [blame] | 740 | GB_APB_REQUEST_LOG, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 741 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE, |
| 742 | 0x00, 0x00, |
| 743 | buf, |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 744 | APB1_LOG_MSG_SIZE, |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 745 | ES2_TIMEOUT); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 746 | if (retval > 0) |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 747 | kfifo_in(&es2->apb_log_fifo, buf, retval); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 748 | } while (retval > 0); |
| 749 | } |
| 750 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 751 | static int apb_log_poll(void *data) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 752 | { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 753 | struct es2_ap_dev *es2 = data; |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 754 | char *buf; |
| 755 | |
| 756 | buf = kmalloc(APB1_LOG_MSG_SIZE, GFP_KERNEL); |
| 757 | if (!buf) |
| 758 | return -ENOMEM; |
| 759 | |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 760 | while (!kthread_should_stop()) { |
| 761 | msleep(1000); |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 762 | apb_log_get(es2, buf); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 763 | } |
Johan Hovold | c15ccab | 2015-04-07 11:27:12 +0200 | [diff] [blame] | 764 | |
| 765 | kfree(buf); |
| 766 | |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 767 | return 0; |
| 768 | } |
| 769 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 770 | static ssize_t apb_log_read(struct file *f, char __user *buf, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 771 | size_t count, loff_t *ppos) |
| 772 | { |
Alex Elder | 8995a39 | 2015-10-27 22:18:39 -0500 | [diff] [blame] | 773 | struct es2_ap_dev *es2 = f->f_inode->i_private; |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 774 | ssize_t ret; |
| 775 | size_t copied; |
| 776 | char *tmp_buf; |
| 777 | |
| 778 | if (count > APB1_LOG_SIZE) |
| 779 | count = APB1_LOG_SIZE; |
| 780 | |
| 781 | tmp_buf = kmalloc(count, GFP_KERNEL); |
| 782 | if (!tmp_buf) |
| 783 | return -ENOMEM; |
| 784 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 785 | copied = kfifo_out(&es2->apb_log_fifo, tmp_buf, count); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 786 | ret = simple_read_from_buffer(buf, count, ppos, tmp_buf, copied); |
| 787 | |
| 788 | kfree(tmp_buf); |
| 789 | |
| 790 | return ret; |
| 791 | } |
| 792 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 793 | static const struct file_operations apb_log_fops = { |
| 794 | .read = apb_log_read, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 795 | }; |
| 796 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 797 | static void usb_log_enable(struct es2_ap_dev *es2) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 798 | { |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 799 | if (!IS_ERR_OR_NULL(es2->apb_log_task)) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 800 | return; |
| 801 | |
| 802 | /* get log from APB1 */ |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 803 | es2->apb_log_task = kthread_run(apb_log_poll, es2, "apb_log"); |
| 804 | if (IS_ERR(es2->apb_log_task)) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 805 | return; |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 806 | /* XXX We will need to rename this per APB */ |
| 807 | es2->apb_log_dentry = debugfs_create_file("apb_log", S_IRUGO, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 808 | gb_debugfs_get(), NULL, |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 809 | &apb_log_fops); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 810 | } |
| 811 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 812 | static void usb_log_disable(struct es2_ap_dev *es2) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 813 | { |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 814 | if (IS_ERR_OR_NULL(es2->apb_log_task)) |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 815 | return; |
| 816 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 817 | debugfs_remove(es2->apb_log_dentry); |
| 818 | es2->apb_log_dentry = NULL; |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 819 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 820 | kthread_stop(es2->apb_log_task); |
| 821 | es2->apb_log_task = NULL; |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 822 | } |
| 823 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 824 | static ssize_t apb_log_enable_read(struct file *f, char __user *buf, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 825 | size_t count, loff_t *ppos) |
| 826 | { |
Alex Elder | 1482b3e | 2015-10-27 22:18:38 -0500 | [diff] [blame] | 827 | struct es2_ap_dev *es2 = f->f_inode->i_private; |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 828 | int enable = !IS_ERR_OR_NULL(es2->apb_log_task); |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 829 | char tmp_buf[3]; |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 830 | |
| 831 | sprintf(tmp_buf, "%d\n", enable); |
| 832 | return simple_read_from_buffer(buf, count, ppos, tmp_buf, 3); |
| 833 | } |
| 834 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 835 | static ssize_t apb_log_enable_write(struct file *f, const char __user *buf, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 836 | size_t count, loff_t *ppos) |
| 837 | { |
| 838 | int enable; |
| 839 | ssize_t retval; |
Alex Elder | 1482b3e | 2015-10-27 22:18:38 -0500 | [diff] [blame] | 840 | struct es2_ap_dev *es2 = f->f_inode->i_private; |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 841 | |
| 842 | retval = kstrtoint_from_user(buf, count, 10, &enable); |
| 843 | if (retval) |
| 844 | return retval; |
| 845 | |
| 846 | if (enable) |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 847 | usb_log_enable(es2); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 848 | else |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 849 | usb_log_disable(es2); |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 850 | |
| 851 | return count; |
| 852 | } |
| 853 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 854 | static const struct file_operations apb_log_enable_fops = { |
| 855 | .read = apb_log_enable_read, |
| 856 | .write = apb_log_enable_write, |
Greg Kroah-Hartman | ca3ec29 | 2015-03-27 11:38:07 +0100 | [diff] [blame] | 857 | }; |
| 858 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 859 | static int apb_get_cport_count(struct usb_device *udev) |
Fabien Parent | 24a6112 | 2015-09-02 15:50:37 +0200 | [diff] [blame] | 860 | { |
| 861 | int retval; |
| 862 | __le16 *cport_count; |
| 863 | |
| 864 | cport_count = kmalloc(sizeof(*cport_count), GFP_KERNEL); |
| 865 | if (!cport_count) |
| 866 | return -ENOMEM; |
| 867 | |
| 868 | retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
Greg Kroah-Hartman | e527338 | 2015-12-31 11:14:33 -0800 | [diff] [blame] | 869 | GB_APB_REQUEST_CPORT_COUNT, |
Fabien Parent | 24a6112 | 2015-09-02 15:50:37 +0200 | [diff] [blame] | 870 | USB_DIR_IN | USB_TYPE_VENDOR | |
| 871 | USB_RECIP_INTERFACE, 0, 0, cport_count, |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 872 | sizeof(*cport_count), ES2_TIMEOUT); |
Fabien Parent | 24a6112 | 2015-09-02 15:50:37 +0200 | [diff] [blame] | 873 | if (retval < 0) { |
| 874 | dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n", |
| 875 | retval); |
| 876 | goto out; |
| 877 | } |
| 878 | |
| 879 | retval = le16_to_cpu(*cport_count); |
| 880 | |
| 881 | /* We need to fit a CPort ID in one byte of a message header */ |
| 882 | if (retval > U8_MAX) { |
| 883 | retval = U8_MAX; |
| 884 | dev_warn(&udev->dev, "Limiting number of CPorts to U8_MAX\n"); |
| 885 | } |
| 886 | |
| 887 | out: |
| 888 | kfree(cport_count); |
| 889 | return retval; |
| 890 | } |
| 891 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 892 | /* |
Johan Hovold | 4d5c446 | 2015-11-02 11:56:57 +0100 | [diff] [blame] | 893 | * The ES2 USB Bridge device has 15 endpoints |
| 894 | * 1 Control - usual USB stuff + AP -> APBridgeA messages |
| 895 | * 7 Bulk IN - CPort data in |
| 896 | * 7 Bulk OUT - CPort data out |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 897 | */ |
| 898 | static int ap_probe(struct usb_interface *interface, |
| 899 | const struct usb_device_id *id) |
| 900 | { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 901 | struct es2_ap_dev *es2; |
Johan Hovold | 2537636 | 2015-11-03 18:03:23 +0100 | [diff] [blame] | 902 | struct gb_host_device *hd; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 903 | struct usb_device *udev; |
| 904 | struct usb_host_interface *iface_desc; |
| 905 | struct usb_endpoint_descriptor *endpoint; |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 906 | int bulk_in = 0; |
| 907 | int bulk_out = 0; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 908 | int retval = -ENOMEM; |
| 909 | int i; |
Fabien Parent | 24a6112 | 2015-09-02 15:50:37 +0200 | [diff] [blame] | 910 | int num_cports; |
Laurent Pinchart | a75fd8b | 2015-12-08 19:54:59 +0200 | [diff] [blame] | 911 | int cport_id; |
Alex Elder | 4bc1389 | 2015-06-13 11:02:11 -0500 | [diff] [blame] | 912 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 913 | udev = usb_get_dev(interface_to_usbdev(interface)); |
| 914 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 915 | num_cports = apb_get_cport_count(udev); |
Fabien Parent | 24a6112 | 2015-09-02 15:50:37 +0200 | [diff] [blame] | 916 | if (num_cports < 0) { |
| 917 | usb_put_dev(udev); |
| 918 | dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n", |
| 919 | num_cports); |
| 920 | return num_cports; |
| 921 | } |
| 922 | |
Johan Hovold | d6e139b | 2015-11-03 18:03:25 +0100 | [diff] [blame] | 923 | hd = gb_hd_create(&es2_driver, &udev->dev, ES2_GBUF_MSG_SIZE_MAX, |
| 924 | num_cports); |
Alex Elder | 8ea70fe | 2015-05-22 09:52:45 -0500 | [diff] [blame] | 925 | if (IS_ERR(hd)) { |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 926 | usb_put_dev(udev); |
Alex Elder | 8ea70fe | 2015-05-22 09:52:45 -0500 | [diff] [blame] | 927 | return PTR_ERR(hd); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 928 | } |
| 929 | |
Laurent Pinchart | a75fd8b | 2015-12-08 19:54:59 +0200 | [diff] [blame] | 930 | /* |
| 931 | * CPorts 16 and 17 are reserved for CDSI0 and CDSI1, make sure they |
| 932 | * won't be allocated dynamically. |
| 933 | */ |
| 934 | do { |
| 935 | cport_id = ida_simple_get(&hd->cport_id_map, 16, 18, GFP_KERNEL); |
| 936 | } while (cport_id > 0); |
| 937 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 938 | es2 = hd_to_es2(hd); |
| 939 | es2->hd = hd; |
| 940 | es2->usb_intf = interface; |
| 941 | es2->usb_dev = udev; |
| 942 | spin_lock_init(&es2->cport_out_urb_lock); |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 943 | INIT_KFIFO(es2->apb_log_fifo); |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 944 | usb_set_intfdata(interface, es2); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 945 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 946 | es2->cport_to_ep = kcalloc(hd->num_cports, sizeof(*es2->cport_to_ep), |
Fabien Parent | c011d55 | 2015-09-02 15:50:36 +0200 | [diff] [blame] | 947 | GFP_KERNEL); |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 948 | if (!es2->cport_to_ep) { |
Fabien Parent | c011d55 | 2015-09-02 15:50:36 +0200 | [diff] [blame] | 949 | retval = -ENOMEM; |
| 950 | goto error; |
| 951 | } |
| 952 | |
Johan Hovold | 4d5c446 | 2015-11-02 11:56:57 +0100 | [diff] [blame] | 953 | /* find all bulk endpoints */ |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 954 | iface_desc = interface->cur_altsetting; |
| 955 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 956 | endpoint = &iface_desc->endpoint[i].desc; |
| 957 | |
Greg Kroah-Hartman | b767ee4 | 2015-07-24 17:09:48 -0700 | [diff] [blame] | 958 | if (usb_endpoint_is_bulk_in(endpoint)) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 959 | es2->cport_in[bulk_in++].endpoint = |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 960 | endpoint->bEndpointAddress; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 961 | } else if (usb_endpoint_is_bulk_out(endpoint)) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 962 | es2->cport_out[bulk_out++].endpoint = |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 963 | endpoint->bEndpointAddress; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 964 | } else { |
| 965 | dev_err(&udev->dev, |
Viresh Kumar | b933fa4 | 2015-12-04 21:30:10 +0530 | [diff] [blame] | 966 | "Unknown endpoint type found, address 0x%02x\n", |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 967 | endpoint->bEndpointAddress); |
| 968 | } |
| 969 | } |
Johan Hovold | b6d8085 | 2015-11-04 18:55:13 +0100 | [diff] [blame] | 970 | if (bulk_in != NUM_BULKS || bulk_out != NUM_BULKS) { |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 971 | dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n"); |
| 972 | goto error; |
| 973 | } |
| 974 | |
Johan Hovold | 0ce68ce4 | 2015-11-04 18:55:14 +0100 | [diff] [blame] | 975 | /* Allocate buffers for our cport in messages */ |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 976 | for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) { |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 977 | struct es2_cport_in *cport_in = &es2->cport_in[bulk_in]; |
| 978 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 979 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 980 | struct urb *urb; |
| 981 | u8 *buffer; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 982 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 983 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 984 | if (!urb) |
| 985 | goto error; |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 986 | buffer = kmalloc(ES2_GBUF_MSG_SIZE_MAX, GFP_KERNEL); |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 987 | if (!buffer) |
| 988 | goto error; |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 989 | |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 990 | usb_fill_bulk_urb(urb, udev, |
| 991 | usb_rcvbulkpipe(udev, |
| 992 | cport_in->endpoint), |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 993 | buffer, ES2_GBUF_MSG_SIZE_MAX, |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 994 | cport_in_callback, hd); |
| 995 | cport_in->urb[i] = urb; |
| 996 | cport_in->buffer[i] = buffer; |
Alexandre Bailon | 606addd | 2015-06-15 18:08:13 +0200 | [diff] [blame] | 997 | } |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | /* Allocate urbs for our CPort OUT messages */ |
| 1001 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 1002 | struct urb *urb; |
| 1003 | |
| 1004 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1005 | if (!urb) |
| 1006 | goto error; |
| 1007 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 1008 | es2->cport_out_urb[i] = urb; |
| 1009 | es2->cport_out_urb_busy[i] = false; /* just to be anal */ |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1010 | } |
| 1011 | |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 1012 | /* XXX We will need to rename this per APB */ |
| 1013 | es2->apb_log_enable_dentry = debugfs_create_file("apb_log_enable", |
Johan Hovold | 86f918e | 2015-06-23 14:17:41 +0200 | [diff] [blame] | 1014 | (S_IWUSR | S_IRUGO), |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 1015 | gb_debugfs_get(), es2, |
Alex Elder | 3be0e17 | 2015-10-27 22:18:41 -0500 | [diff] [blame] | 1016 | &apb_log_enable_fops); |
Johan Hovold | 0ce68ce4 | 2015-11-04 18:55:14 +0100 | [diff] [blame] | 1017 | |
Johan Hovold | c170047 | 2015-11-04 18:55:22 +0100 | [diff] [blame] | 1018 | retval = gb_hd_add(hd); |
| 1019 | if (retval) |
| 1020 | goto error; |
| 1021 | |
Johan Hovold | 0ce68ce4 | 2015-11-04 18:55:14 +0100 | [diff] [blame] | 1022 | for (i = 0; i < NUM_BULKS; ++i) { |
| 1023 | retval = es2_cport_in_enable(es2, &es2->cport_in[i]); |
| 1024 | if (retval) |
Johan Hovold | 57bc17f | 2015-11-04 18:55:20 +0100 | [diff] [blame] | 1025 | goto err_disable_cport_in; |
Johan Hovold | 0ce68ce4 | 2015-11-04 18:55:14 +0100 | [diff] [blame] | 1026 | } |
| 1027 | |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1028 | return 0; |
Johan Hovold | 57bc17f | 2015-11-04 18:55:20 +0100 | [diff] [blame] | 1029 | |
| 1030 | err_disable_cport_in: |
| 1031 | for (--i; i >= 0; --i) |
| 1032 | es2_cport_in_disable(es2, &es2->cport_in[i]); |
Johan Hovold | c170047 | 2015-11-04 18:55:22 +0100 | [diff] [blame] | 1033 | gb_hd_del(hd); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1034 | error: |
Johan Hovold | 57bc17f | 2015-11-04 18:55:20 +0100 | [diff] [blame] | 1035 | es2_destroy(es2); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1036 | |
| 1037 | return retval; |
| 1038 | } |
| 1039 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 1040 | static struct usb_driver es2_ap_driver = { |
Rob Herring | c13c8bf | 2015-05-05 11:04:22 -0500 | [diff] [blame] | 1041 | .name = "es2_ap_driver", |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1042 | .probe = ap_probe, |
| 1043 | .disconnect = ap_disconnect, |
| 1044 | .id_table = id_table, |
| 1045 | }; |
| 1046 | |
Alex Elder | 4b1d820 | 2015-10-27 22:18:37 -0500 | [diff] [blame] | 1047 | module_usb_driver(es2_ap_driver); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1048 | |
Greg Kroah-Hartman | 6cf42a4 | 2015-04-13 19:51:33 +0200 | [diff] [blame] | 1049 | MODULE_LICENSE("GPL v2"); |
Greg Kroah-Hartman | f587027 | 2015-01-21 10:24:15 +0800 | [diff] [blame] | 1050 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |