Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Shared Transport Line discipline driver Core |
| 3 | * Init Manager module responsible for GPIO control |
| 4 | * and firmware download |
Pavan Savoy | a0cc2f3 | 2010-10-06 12:18:14 -0400 | [diff] [blame] | 5 | * Copyright (C) 2009-2010 Texas Instruments |
| 6 | * Author: Pavan Savoy <pavan_savoy@ti.com> |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #define pr_fmt(fmt) "(stk) :" fmt |
| 24 | #include <linux/platform_device.h> |
| 25 | #include <linux/jiffies.h> |
| 26 | #include <linux/firmware.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/wait.h> |
| 29 | #include <linux/gpio.h> |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 30 | #include <linux/debugfs.h> |
| 31 | #include <linux/seq_file.h> |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 32 | #include <linux/sched.h> |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 33 | #include <linux/tty.h> |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 34 | |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 35 | #include <linux/skbuff.h> |
Pavan Savoy | e555867 | 2010-09-30 16:13:30 -0400 | [diff] [blame] | 36 | #include <linux/ti_wilink_st.h> |
Pavan Savoy | 83ef41f | 2010-09-17 12:06:11 -0400 | [diff] [blame] | 37 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 38 | |
Pavan Savoy | dbd3a87 | 2010-08-19 14:08:51 -0400 | [diff] [blame] | 39 | #define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */ |
Pavan Savoy | 73f12e8 | 2010-10-12 16:27:38 -0400 | [diff] [blame] | 40 | static struct platform_device *st_kim_devices[MAX_ST_DEVICES]; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 41 | |
| 42 | /**********************************************************************/ |
| 43 | /* internal functions */ |
| 44 | |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 45 | /** |
Pavan Savoy | dbd3a87 | 2010-08-19 14:08:51 -0400 | [diff] [blame] | 46 | * st_get_plat_device - |
| 47 | * function which returns the reference to the platform device |
| 48 | * requested by id. As of now only 1 such device exists (id=0) |
| 49 | * the context requesting for reference can get the id to be |
| 50 | * requested by a. The protocol driver which is registering or |
| 51 | * b. the tty device which is opened. |
| 52 | */ |
| 53 | static struct platform_device *st_get_plat_device(int id) |
| 54 | { |
| 55 | return st_kim_devices[id]; |
| 56 | } |
| 57 | |
| 58 | /** |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 59 | * validate_firmware_response - |
| 60 | * function to return whether the firmware response was proper |
| 61 | * in case of error don't complete so that waiting for proper |
| 62 | * response times out |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 63 | */ |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 64 | void validate_firmware_response(struct kim_data_s *kim_gdata) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 65 | { |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 66 | struct sk_buff *skb = kim_gdata->rx_skb; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 67 | if (unlikely(skb->data[5] != 0)) { |
| 68 | pr_err("no proper response during fw download"); |
| 69 | pr_err("data6 %x", skb->data[5]); |
| 70 | return; /* keep waiting for the proper response */ |
| 71 | } |
| 72 | /* becos of all the script being downloaded */ |
| 73 | complete_all(&kim_gdata->kim_rcvd); |
| 74 | kfree_skb(skb); |
| 75 | } |
| 76 | |
| 77 | /* check for data len received inside kim_int_recv |
| 78 | * most often hit the last case to update state to waiting for data |
| 79 | */ |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 80 | static inline int kim_check_data_len(struct kim_data_s *kim_gdata, int len) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 81 | { |
| 82 | register int room = skb_tailroom(kim_gdata->rx_skb); |
| 83 | |
Pavan Savoy | e6d9e64 | 2010-07-22 05:32:05 -0500 | [diff] [blame] | 84 | pr_debug("len %d room %d", len, room); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 85 | |
| 86 | if (!len) { |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 87 | validate_firmware_response(kim_gdata); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 88 | } else if (len > room) { |
| 89 | /* Received packet's payload length is larger. |
| 90 | * We can't accommodate it in created skb. |
| 91 | */ |
| 92 | pr_err("Data length is too large len %d room %d", len, |
| 93 | room); |
| 94 | kfree_skb(kim_gdata->rx_skb); |
| 95 | } else { |
| 96 | /* Packet header has non-zero payload length and |
| 97 | * we have enough space in created skb. Lets read |
| 98 | * payload data */ |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 99 | kim_gdata->rx_state = ST_W4_DATA; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 100 | kim_gdata->rx_count = len; |
| 101 | return len; |
| 102 | } |
| 103 | |
| 104 | /* Change ST LL state to continue to process next |
| 105 | * packet */ |
| 106 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; |
| 107 | kim_gdata->rx_skb = NULL; |
| 108 | kim_gdata->rx_count = 0; |
| 109 | |
| 110 | return 0; |
| 111 | } |
| 112 | |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 113 | /** |
| 114 | * kim_int_recv - receive function called during firmware download |
| 115 | * firmware download responses on different UART drivers |
| 116 | * have been observed to come in bursts of different |
| 117 | * tty_receive and hence the logic |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 118 | */ |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 119 | void kim_int_recv(struct kim_data_s *kim_gdata, |
| 120 | const unsigned char *data, long count) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 121 | { |
Pavan Savoy | 73f12e8 | 2010-10-12 16:27:38 -0400 | [diff] [blame] | 122 | const unsigned char *ptr; |
Pavan Savoy | 73f12e8 | 2010-10-12 16:27:38 -0400 | [diff] [blame] | 123 | int len = 0, type = 0; |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 124 | unsigned char *plen; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 125 | |
Pavan Savoy | e6d9e64 | 2010-07-22 05:32:05 -0500 | [diff] [blame] | 126 | pr_debug("%s", __func__); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 127 | /* Decode received bytes here */ |
Pavan Savoy | 73f12e8 | 2010-10-12 16:27:38 -0400 | [diff] [blame] | 128 | ptr = data; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 129 | if (unlikely(ptr == NULL)) { |
| 130 | pr_err(" received null from TTY "); |
| 131 | return; |
| 132 | } |
Pavan Savoy | 73f12e8 | 2010-10-12 16:27:38 -0400 | [diff] [blame] | 133 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 134 | while (count) { |
| 135 | if (kim_gdata->rx_count) { |
| 136 | len = min_t(unsigned int, kim_gdata->rx_count, count); |
| 137 | memcpy(skb_put(kim_gdata->rx_skb, len), ptr, len); |
| 138 | kim_gdata->rx_count -= len; |
| 139 | count -= len; |
| 140 | ptr += len; |
| 141 | |
| 142 | if (kim_gdata->rx_count) |
| 143 | continue; |
| 144 | |
| 145 | /* Check ST RX state machine , where are we? */ |
| 146 | switch (kim_gdata->rx_state) { |
| 147 | /* Waiting for complete packet ? */ |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 148 | case ST_W4_DATA: |
Pavan Savoy | e6d9e64 | 2010-07-22 05:32:05 -0500 | [diff] [blame] | 149 | pr_debug("Complete pkt received"); |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 150 | validate_firmware_response(kim_gdata); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 151 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; |
| 152 | kim_gdata->rx_skb = NULL; |
| 153 | continue; |
| 154 | /* Waiting for Bluetooth event header ? */ |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 155 | case ST_W4_HEADER: |
| 156 | plen = |
| 157 | (unsigned char *)&kim_gdata->rx_skb->data[1]; |
| 158 | pr_debug("event hdr: plen 0x%02x\n", *plen); |
| 159 | kim_check_data_len(kim_gdata, *plen); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 160 | continue; |
| 161 | } /* end of switch */ |
| 162 | } /* end of if rx_state */ |
| 163 | switch (*ptr) { |
| 164 | /* Bluetooth event packet? */ |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 165 | case 0x04: |
| 166 | kim_gdata->rx_state = ST_W4_HEADER; |
| 167 | kim_gdata->rx_count = 2; |
| 168 | type = *ptr; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 169 | break; |
| 170 | default: |
| 171 | pr_info("unknown packet"); |
| 172 | ptr++; |
| 173 | count--; |
| 174 | continue; |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 175 | } |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 176 | ptr++; |
| 177 | count--; |
| 178 | kim_gdata->rx_skb = |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 179 | alloc_skb(1024+8, GFP_ATOMIC); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 180 | if (!kim_gdata->rx_skb) { |
| 181 | pr_err("can't allocate mem for new packet"); |
| 182 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; |
| 183 | kim_gdata->rx_count = 0; |
| 184 | return; |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 185 | } |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 186 | skb_reserve(kim_gdata->rx_skb, 8); |
| 187 | kim_gdata->rx_skb->cb[0] = 4; |
| 188 | kim_gdata->rx_skb->cb[1] = 0; |
| 189 | |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 190 | } |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 191 | return; |
| 192 | } |
| 193 | |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 194 | static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 195 | { |
| 196 | unsigned short version = 0, chip = 0, min_ver = 0, maj_ver = 0; |
Pavan Savoy | 73f12e8 | 2010-10-12 16:27:38 -0400 | [diff] [blame] | 197 | const char read_ver_cmd[] = { 0x01, 0x01, 0x10, 0x00 }; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 198 | |
Pavan Savoy | e6d9e64 | 2010-07-22 05:32:05 -0500 | [diff] [blame] | 199 | pr_debug("%s", __func__); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 200 | |
| 201 | INIT_COMPLETION(kim_gdata->kim_rcvd); |
| 202 | if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) { |
| 203 | pr_err("kim: couldn't write 4 bytes"); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 204 | return -EIO; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | if (!wait_for_completion_timeout |
| 208 | (&kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) { |
| 209 | pr_err(" waiting for ver info- timed out "); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 210 | return -ETIMEDOUT; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | version = |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 214 | MAKEWORD(kim_gdata->resp_buffer[13], |
| 215 | kim_gdata->resp_buffer[14]); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 216 | chip = (version & 0x7C00) >> 10; |
| 217 | min_ver = (version & 0x007F); |
| 218 | maj_ver = (version & 0x0380) >> 7; |
| 219 | |
| 220 | if (version & 0x8000) |
| 221 | maj_ver |= 0x0008; |
| 222 | |
| 223 | sprintf(bts_scr_name, "TIInit_%d.%d.%d.bts", chip, maj_ver, min_ver); |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 224 | |
| 225 | /* to be accessed later via sysfs entry */ |
| 226 | kim_gdata->version.full = version; |
| 227 | kim_gdata->version.chip = chip; |
| 228 | kim_gdata->version.maj_ver = maj_ver; |
| 229 | kim_gdata->version.min_ver = min_ver; |
| 230 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 231 | pr_info("%s", bts_scr_name); |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 232 | return 0; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 233 | } |
| 234 | |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 235 | /** |
| 236 | * download_firmware - |
| 237 | * internal function which parses through the .bts firmware |
| 238 | * script file intreprets SEND, DELAY actions only as of now |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 239 | */ |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 240 | static long download_firmware(struct kim_data_s *kim_gdata) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 241 | { |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 242 | long err = 0; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 243 | long len = 0; |
Pavan Savoy | 73f12e8 | 2010-10-12 16:27:38 -0400 | [diff] [blame] | 244 | unsigned char *ptr = NULL; |
| 245 | unsigned char *action_ptr = NULL; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 246 | unsigned char bts_scr_name[30] = { 0 }; /* 30 char long bts scr name? */ |
| 247 | |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 248 | err = read_local_version(kim_gdata, bts_scr_name); |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 249 | if (err != 0) { |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 250 | pr_err("kim: failed to read local ver"); |
| 251 | return err; |
| 252 | } |
| 253 | err = |
| 254 | request_firmware(&kim_gdata->fw_entry, bts_scr_name, |
| 255 | &kim_gdata->kim_pdev->dev); |
| 256 | if (unlikely((err != 0) || (kim_gdata->fw_entry->data == NULL) || |
| 257 | (kim_gdata->fw_entry->size == 0))) { |
| 258 | pr_err(" request_firmware failed(errno %ld) for %s", err, |
| 259 | bts_scr_name); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 260 | return -EINVAL; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 261 | } |
| 262 | ptr = (void *)kim_gdata->fw_entry->data; |
| 263 | len = kim_gdata->fw_entry->size; |
| 264 | /* bts_header to remove out magic number and |
| 265 | * version |
| 266 | */ |
| 267 | ptr += sizeof(struct bts_header); |
| 268 | len -= sizeof(struct bts_header); |
| 269 | |
| 270 | while (len > 0 && ptr) { |
Pavan Savoy | e6d9e64 | 2010-07-22 05:32:05 -0500 | [diff] [blame] | 271 | pr_debug(" action size %d, type %d ", |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 272 | ((struct bts_action *)ptr)->size, |
| 273 | ((struct bts_action *)ptr)->type); |
| 274 | |
| 275 | switch (((struct bts_action *)ptr)->type) { |
| 276 | case ACTION_SEND_COMMAND: /* action send */ |
| 277 | action_ptr = &(((struct bts_action *)ptr)->data[0]); |
| 278 | if (unlikely |
| 279 | (((struct hci_command *)action_ptr)->opcode == |
| 280 | 0xFF36)) { |
| 281 | /* ignore remote change |
| 282 | * baud rate HCI VS command */ |
| 283 | pr_err |
Pavan Savoy | e6d9e64 | 2010-07-22 05:32:05 -0500 | [diff] [blame] | 284 | (" change remote baud" |
| 285 | " rate command in firmware"); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 286 | break; |
| 287 | } |
| 288 | |
| 289 | INIT_COMPLETION(kim_gdata->kim_rcvd); |
| 290 | err = st_int_write(kim_gdata->core_data, |
| 291 | ((struct bts_action_send *)action_ptr)->data, |
| 292 | ((struct bts_action *)ptr)->size); |
| 293 | if (unlikely(err < 0)) { |
| 294 | release_firmware(kim_gdata->fw_entry); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 295 | return err; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 296 | } |
| 297 | if (!wait_for_completion_timeout |
| 298 | (&kim_gdata->kim_rcvd, |
| 299 | msecs_to_jiffies(CMD_RESP_TIME))) { |
| 300 | pr_err |
| 301 | (" response timeout during fw download "); |
| 302 | /* timed out */ |
| 303 | release_firmware(kim_gdata->fw_entry); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 304 | return -ETIMEDOUT; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 305 | } |
| 306 | break; |
| 307 | case ACTION_DELAY: /* sleep */ |
| 308 | pr_info("sleep command in scr"); |
| 309 | action_ptr = &(((struct bts_action *)ptr)->data[0]); |
| 310 | mdelay(((struct bts_action_delay *)action_ptr)->msec); |
| 311 | break; |
| 312 | } |
| 313 | len = |
| 314 | len - (sizeof(struct bts_action) + |
| 315 | ((struct bts_action *)ptr)->size); |
| 316 | ptr = |
| 317 | ptr + sizeof(struct bts_action) + |
| 318 | ((struct bts_action *)ptr)->size; |
| 319 | } |
| 320 | /* fw download complete */ |
| 321 | release_firmware(kim_gdata->fw_entry); |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 322 | return 0; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | /**********************************************************************/ |
| 326 | /* functions called from ST core */ |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 327 | /* function to toggle the GPIO |
| 328 | * needs to know whether the GPIO is active high or active low |
| 329 | */ |
| 330 | void st_kim_chip_toggle(enum proto_type type, enum kim_gpio_state state) |
| 331 | { |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 332 | struct platform_device *kim_pdev; |
| 333 | struct kim_data_s *kim_gdata; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 334 | pr_info(" %s ", __func__); |
| 335 | |
Pavan Savoy | dbd3a87 | 2010-08-19 14:08:51 -0400 | [diff] [blame] | 336 | kim_pdev = st_get_plat_device(0); |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 337 | kim_gdata = dev_get_drvdata(&kim_pdev->dev); |
| 338 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 339 | if (kim_gdata->gpios[type] == -1) { |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 340 | pr_info("gpio not requested for protocol %d", type); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 341 | return; |
| 342 | } |
| 343 | switch (type) { |
| 344 | case ST_BT: |
| 345 | /*Do Nothing */ |
| 346 | break; |
| 347 | |
| 348 | case ST_FM: |
| 349 | if (state == KIM_GPIO_ACTIVE) |
| 350 | gpio_set_value(kim_gdata->gpios[ST_FM], GPIO_LOW); |
| 351 | else |
| 352 | gpio_set_value(kim_gdata->gpios[ST_FM], GPIO_HIGH); |
| 353 | break; |
| 354 | |
| 355 | case ST_GPS: |
| 356 | if (state == KIM_GPIO_ACTIVE) |
| 357 | gpio_set_value(kim_gdata->gpios[ST_GPS], GPIO_HIGH); |
| 358 | else |
| 359 | gpio_set_value(kim_gdata->gpios[ST_GPS], GPIO_LOW); |
| 360 | break; |
| 361 | |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 362 | case ST_MAX_CHANNELS: |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 363 | default: |
| 364 | break; |
| 365 | } |
| 366 | |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | /* called from ST Core, when REG_IN_PROGRESS (registration in progress) |
| 371 | * can be because of |
| 372 | * 1. response to read local version |
| 373 | * 2. during send/recv's of firmware download |
| 374 | */ |
| 375 | void st_kim_recv(void *disc_data, const unsigned char *data, long count) |
| 376 | { |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 377 | struct st_data_s *st_gdata = (struct st_data_s *)disc_data; |
| 378 | struct kim_data_s *kim_gdata = st_gdata->kim_data; |
| 379 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 380 | /* copy to local buffer */ |
| 381 | if (unlikely(data[4] == 0x01 && data[5] == 0x10 && data[0] == 0x04)) { |
| 382 | /* must be the read_ver_cmd */ |
| 383 | memcpy(kim_gdata->resp_buffer, data, count); |
| 384 | complete_all(&kim_gdata->kim_rcvd); |
| 385 | return; |
| 386 | } else { |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 387 | kim_int_recv(kim_gdata, data, count); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 388 | /* either completes or times out */ |
| 389 | } |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | /* to signal completion of line discipline installation |
| 394 | * called from ST Core, upon tty_open |
| 395 | */ |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 396 | void st_kim_complete(void *kim_data) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 397 | { |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 398 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 399 | complete(&kim_gdata->ldisc_installed); |
| 400 | } |
| 401 | |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 402 | /** |
| 403 | * st_kim_start - called from ST Core upon 1st registration |
| 404 | * This involves toggling the chip enable gpio, reading |
| 405 | * the firmware version from chip, forming the fw file name |
| 406 | * based on the chip version, requesting the fw, parsing it |
| 407 | * and perform download(send/recv). |
| 408 | */ |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 409 | long st_kim_start(void *kim_data) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 410 | { |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 411 | long err = 0; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 412 | long retry = POR_RETRY_COUNT; |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 413 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
| 414 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 415 | pr_info(" %s", __func__); |
| 416 | |
| 417 | do { |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 418 | /* Configure BT nShutdown to HIGH state */ |
| 419 | gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_LOW); |
| 420 | mdelay(5); /* FIXME: a proper toggle */ |
| 421 | gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_HIGH); |
| 422 | mdelay(100); |
| 423 | /* re-initialize the completion */ |
| 424 | INIT_COMPLETION(kim_gdata->ldisc_installed); |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 425 | /* send notification to UIM */ |
| 426 | kim_gdata->ldisc_install = 1; |
| 427 | pr_info("ldisc_install = 1"); |
| 428 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, |
| 429 | NULL, "install"); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 430 | /* wait for ldisc to be installed */ |
| 431 | err = wait_for_completion_timeout(&kim_gdata->ldisc_installed, |
| 432 | msecs_to_jiffies(LDISC_TIME)); |
| 433 | if (!err) { /* timeout */ |
| 434 | pr_err("line disc installation timed out "); |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 435 | kim_gdata->ldisc_install = 0; |
| 436 | pr_info("ldisc_install = 0"); |
| 437 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, |
| 438 | NULL, "install"); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 439 | err = -ETIMEDOUT; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 440 | continue; |
| 441 | } else { |
| 442 | /* ldisc installed now */ |
| 443 | pr_info(" line discipline installed "); |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 444 | err = download_firmware(kim_gdata); |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 445 | if (err != 0) { |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 446 | pr_err("download firmware failed"); |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 447 | kim_gdata->ldisc_install = 0; |
| 448 | pr_info("ldisc_install = 0"); |
| 449 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, |
| 450 | NULL, "install"); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 451 | continue; |
| 452 | } else { /* on success don't retry */ |
| 453 | break; |
| 454 | } |
| 455 | } |
| 456 | } while (retry--); |
| 457 | return err; |
| 458 | } |
| 459 | |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 460 | /** |
| 461 | * st_kim_stop - called from ST Core, on the last un-registration |
| 462 | * toggle low the chip enable gpio |
| 463 | */ |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 464 | long st_kim_stop(void *kim_data) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 465 | { |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 466 | long err = 0; |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 467 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 468 | |
| 469 | INIT_COMPLETION(kim_gdata->ldisc_installed); |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 470 | |
| 471 | /* Flush any pending characters in the driver and discipline. */ |
| 472 | tty_ldisc_flush(kim_gdata->core_data->tty); |
| 473 | tty_driver_flush_buffer(kim_gdata->core_data->tty); |
| 474 | |
| 475 | /* send uninstall notification to UIM */ |
| 476 | pr_info("ldisc_install = 0"); |
| 477 | kim_gdata->ldisc_install = 0; |
| 478 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, NULL, "install"); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 479 | |
| 480 | /* wait for ldisc to be un-installed */ |
| 481 | err = wait_for_completion_timeout(&kim_gdata->ldisc_installed, |
| 482 | msecs_to_jiffies(LDISC_TIME)); |
| 483 | if (!err) { /* timeout */ |
| 484 | pr_err(" timed out waiting for ldisc to be un-installed"); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 485 | return -ETIMEDOUT; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | /* By default configure BT nShutdown to LOW state */ |
| 489 | gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_LOW); |
| 490 | mdelay(1); |
| 491 | gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_HIGH); |
| 492 | mdelay(1); |
| 493 | gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_LOW); |
| 494 | return err; |
| 495 | } |
| 496 | |
| 497 | /**********************************************************************/ |
| 498 | /* functions called from subsystems */ |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 499 | /* called when debugfs entry is read from */ |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 500 | |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 501 | static int show_version(struct seq_file *s, void *unused) |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 502 | { |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 503 | struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; |
| 504 | seq_printf(s, "%04X %d.%d.%d\n", kim_gdata->version.full, |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 505 | kim_gdata->version.chip, kim_gdata->version.maj_ver, |
| 506 | kim_gdata->version.min_ver); |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 507 | return 0; |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 508 | } |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 509 | |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 510 | static int show_list(struct seq_file *s, void *unused) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 511 | { |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 512 | struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; |
| 513 | kim_st_list_protocols(kim_gdata->core_data, s); |
| 514 | return 0; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 515 | } |
| 516 | |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 517 | static ssize_t show_install(struct device *dev, |
| 518 | struct device_attribute *attr, char *buf) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 519 | { |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 520 | struct kim_data_s *kim_data = dev_get_drvdata(dev); |
| 521 | return sprintf(buf, "%d\n", kim_data->ldisc_install); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 522 | } |
| 523 | |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 524 | static ssize_t show_dev_name(struct device *dev, |
| 525 | struct device_attribute *attr, char *buf) |
| 526 | { |
| 527 | struct kim_data_s *kim_data = dev_get_drvdata(dev); |
| 528 | return sprintf(buf, "%s\n", kim_data->dev_name); |
| 529 | } |
| 530 | |
| 531 | static ssize_t show_baud_rate(struct device *dev, |
| 532 | struct device_attribute *attr, char *buf) |
| 533 | { |
| 534 | struct kim_data_s *kim_data = dev_get_drvdata(dev); |
| 535 | return sprintf(buf, "%ld\n", kim_data->baud_rate); |
| 536 | } |
| 537 | |
| 538 | static ssize_t show_flow_cntrl(struct device *dev, |
| 539 | struct device_attribute *attr, char *buf) |
| 540 | { |
| 541 | struct kim_data_s *kim_data = dev_get_drvdata(dev); |
| 542 | return sprintf(buf, "%d\n", kim_data->flow_cntrl); |
| 543 | } |
| 544 | |
| 545 | /* structures specific for sysfs entries */ |
| 546 | static struct kobj_attribute ldisc_install = |
| 547 | __ATTR(install, 0444, (void *)show_install, NULL); |
| 548 | |
| 549 | static struct kobj_attribute uart_dev_name = |
| 550 | __ATTR(dev_name, 0444, (void *)show_dev_name, NULL); |
| 551 | |
| 552 | static struct kobj_attribute uart_baud_rate = |
| 553 | __ATTR(baud_rate, 0444, (void *)show_baud_rate, NULL); |
| 554 | |
| 555 | static struct kobj_attribute uart_flow_cntrl = |
| 556 | __ATTR(flow_cntrl, 0444, (void *)show_flow_cntrl, NULL); |
| 557 | |
| 558 | static struct attribute *uim_attrs[] = { |
| 559 | &ldisc_install.attr, |
| 560 | &uart_dev_name.attr, |
| 561 | &uart_baud_rate.attr, |
| 562 | &uart_flow_cntrl.attr, |
| 563 | NULL, |
| 564 | }; |
| 565 | |
| 566 | static struct attribute_group uim_attr_grp = { |
| 567 | .attrs = uim_attrs, |
| 568 | }; |
| 569 | |
Pavan Savoy | 36b5aee | 2010-07-22 05:32:06 -0500 | [diff] [blame] | 570 | /** |
| 571 | * st_kim_ref - reference the core's data |
| 572 | * This references the per-ST platform device in the arch/xx/ |
| 573 | * board-xx.c file. |
| 574 | * This would enable multiple such platform devices to exist |
| 575 | * on a given platform |
| 576 | */ |
Pavan Savoy | dbd3a87 | 2010-08-19 14:08:51 -0400 | [diff] [blame] | 577 | void st_kim_ref(struct st_data_s **core_data, int id) |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 578 | { |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 579 | struct platform_device *pdev; |
| 580 | struct kim_data_s *kim_gdata; |
| 581 | /* get kim_gdata reference from platform device */ |
Pavan Savoy | dbd3a87 | 2010-08-19 14:08:51 -0400 | [diff] [blame] | 582 | pdev = st_get_plat_device(id); |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 583 | kim_gdata = dev_get_drvdata(&pdev->dev); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 584 | *core_data = kim_gdata->core_data; |
| 585 | } |
| 586 | |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 587 | static int kim_version_open(struct inode *i, struct file *f) |
| 588 | { |
| 589 | return single_open(f, show_version, i->i_private); |
| 590 | } |
| 591 | |
| 592 | static int kim_list_open(struct inode *i, struct file *f) |
| 593 | { |
| 594 | return single_open(f, show_list, i->i_private); |
| 595 | } |
| 596 | |
| 597 | static const struct file_operations version_debugfs_fops = { |
| 598 | /* version info */ |
| 599 | .open = kim_version_open, |
| 600 | .read = seq_read, |
| 601 | .llseek = seq_lseek, |
| 602 | .release = single_release, |
| 603 | }; |
| 604 | static const struct file_operations list_debugfs_fops = { |
| 605 | /* protocols info */ |
| 606 | .open = kim_list_open, |
| 607 | .read = seq_read, |
| 608 | .llseek = seq_lseek, |
| 609 | .release = single_release, |
| 610 | }; |
| 611 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 612 | /**********************************************************************/ |
| 613 | /* functions called from platform device driver subsystem |
| 614 | * need to have a relevant platform device entry in the platform's |
| 615 | * board-*.c file |
| 616 | */ |
| 617 | |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 618 | struct dentry *kim_debugfs_dir; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 619 | static int kim_probe(struct platform_device *pdev) |
| 620 | { |
| 621 | long status; |
| 622 | long proto; |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 623 | struct kim_data_s *kim_gdata; |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 624 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
| 625 | long *gpios = pdata->gpios; |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 626 | |
Pavan Savoy | dfb7ef7 | 2010-09-10 15:58:55 -0400 | [diff] [blame] | 627 | if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) { |
| 628 | /* multiple devices could exist */ |
| 629 | st_kim_devices[pdev->id] = pdev; |
| 630 | } else { |
| 631 | /* platform's sure about existance of 1 device */ |
| 632 | st_kim_devices[0] = pdev; |
| 633 | } |
| 634 | |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 635 | kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_ATOMIC); |
| 636 | if (!kim_gdata) { |
| 637 | pr_err("no mem to allocate"); |
| 638 | return -ENOMEM; |
| 639 | } |
| 640 | dev_set_drvdata(&pdev->dev, kim_gdata); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 641 | |
| 642 | status = st_core_init(&kim_gdata->core_data); |
| 643 | if (status != 0) { |
| 644 | pr_err(" ST core init failed"); |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 645 | return -EIO; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 646 | } |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 647 | /* refer to itself */ |
| 648 | kim_gdata->core_data->kim_data = kim_gdata; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 649 | |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 650 | for (proto = 0; proto < ST_MAX_CHANNELS; proto++) { |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 651 | kim_gdata->gpios[proto] = gpios[proto]; |
| 652 | pr_info(" %ld gpio to be requested", gpios[proto]); |
| 653 | } |
| 654 | |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 655 | for (proto = 0; (proto < ST_MAX_CHANNELS) |
| 656 | && (gpios[proto] != -1); proto++) { |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 657 | /* Claim the Bluetooth/FM/GPIO |
| 658 | * nShutdown gpio from the system |
| 659 | */ |
| 660 | status = gpio_request(gpios[proto], "kim"); |
| 661 | if (unlikely(status)) { |
| 662 | pr_err(" gpio %ld request failed ", gpios[proto]); |
| 663 | proto -= 1; |
| 664 | while (proto >= 0) { |
| 665 | if (gpios[proto] != -1) |
| 666 | gpio_free(gpios[proto]); |
| 667 | } |
| 668 | return status; |
| 669 | } |
| 670 | |
| 671 | /* Configure nShutdown GPIO as output=0 */ |
| 672 | status = |
| 673 | gpio_direction_output(gpios[proto], 0); |
| 674 | if (unlikely(status)) { |
| 675 | pr_err(" unable to configure gpio %ld", |
| 676 | gpios[proto]); |
| 677 | proto -= 1; |
| 678 | while (proto >= 0) { |
| 679 | if (gpios[proto] != -1) |
| 680 | gpio_free(gpios[proto]); |
| 681 | } |
| 682 | return status; |
| 683 | } |
| 684 | } |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 685 | /* get reference of pdev for request_firmware |
| 686 | */ |
| 687 | kim_gdata->kim_pdev = pdev; |
| 688 | init_completion(&kim_gdata->kim_rcvd); |
| 689 | init_completion(&kim_gdata->ldisc_installed); |
Naveen Jain | b38fc2d | 2010-06-09 03:45:32 -0500 | [diff] [blame] | 690 | |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 691 | status = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp); |
| 692 | if (status) { |
| 693 | pr_err("failed to create sysfs entries"); |
| 694 | return status; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 695 | } |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 696 | |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 697 | /* copying platform data */ |
| 698 | strncpy(kim_gdata->dev_name, pdata->dev_name, UART_DEV_NAME_LEN); |
| 699 | kim_gdata->flow_cntrl = pdata->flow_cntrl; |
| 700 | kim_gdata->baud_rate = pdata->baud_rate; |
| 701 | pr_info("sysfs entries created\n"); |
| 702 | |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 703 | kim_debugfs_dir = debugfs_create_dir("ti-st", NULL); |
| 704 | if (IS_ERR(kim_debugfs_dir)) { |
| 705 | pr_err(" debugfs entries creation failed "); |
| 706 | kim_debugfs_dir = NULL; |
Pavan Savoy | 7044266 | 2011-02-04 02:23:11 -0600 | [diff] [blame^] | 707 | return -EIO; |
Naveen Jain | e2a5328 | 2010-06-09 03:45:33 -0500 | [diff] [blame] | 708 | } |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 709 | |
| 710 | debugfs_create_file("version", S_IRUGO, kim_debugfs_dir, |
| 711 | kim_gdata, &version_debugfs_fops); |
| 712 | debugfs_create_file("protocols", S_IRUGO, kim_debugfs_dir, |
| 713 | kim_gdata, &list_debugfs_fops); |
| 714 | pr_info(" debugfs entries created "); |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 715 | return 0; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | static int kim_remove(struct platform_device *pdev) |
| 719 | { |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 720 | /* free the GPIOs requested */ |
| 721 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
| 722 | long *gpios = pdata->gpios; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 723 | long proto; |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 724 | struct kim_data_s *kim_gdata; |
| 725 | |
| 726 | kim_gdata = dev_get_drvdata(&pdev->dev); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 727 | |
Pavan Savoy | 5c88b02 | 2011-02-04 02:23:09 -0600 | [diff] [blame] | 728 | for (proto = 0; (proto < ST_MAX_CHANNELS) |
| 729 | && (gpios[proto] != -1); proto++) { |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 730 | /* Claim the Bluetooth/FM/GPIO |
| 731 | * nShutdown gpio from the system |
| 732 | */ |
| 733 | gpio_free(gpios[proto]); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 734 | } |
| 735 | pr_info("kim: GPIO Freed"); |
Pavan Savoy | c1afac1 | 2010-07-28 02:25:59 -0500 | [diff] [blame] | 736 | debugfs_remove_recursive(kim_debugfs_dir); |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 737 | |
| 738 | sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 739 | kim_gdata->kim_pdev = NULL; |
| 740 | st_core_exit(kim_gdata->core_data); |
Pavan Savoy | 38d9df4 | 2010-07-08 08:55:17 -0500 | [diff] [blame] | 741 | |
| 742 | kfree(kim_gdata); |
| 743 | kim_gdata = NULL; |
Pavan Savoy | 320920c | 2010-07-14 08:21:12 -0500 | [diff] [blame] | 744 | return 0; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 745 | } |
| 746 | |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 747 | int kim_suspend(struct platform_device *pdev, pm_message_t state) |
| 748 | { |
| 749 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
| 750 | |
| 751 | if (pdata->suspend) |
| 752 | return pdata->suspend(pdev, state); |
| 753 | |
| 754 | return -EOPNOTSUPP; |
| 755 | } |
| 756 | |
| 757 | int kim_resume(struct platform_device *pdev) |
| 758 | { |
| 759 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
| 760 | |
| 761 | if (pdata->resume) |
| 762 | return pdata->resume(pdev); |
| 763 | |
| 764 | return -EOPNOTSUPP; |
| 765 | } |
| 766 | |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 767 | /**********************************************************************/ |
| 768 | /* entry point for ST KIM module, called in from ST Core */ |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 769 | static struct platform_driver kim_platform_driver = { |
| 770 | .probe = kim_probe, |
| 771 | .remove = kim_remove, |
| 772 | .suspend = kim_suspend, |
| 773 | .resume = kim_resume, |
| 774 | .driver = { |
| 775 | .name = "kim", |
| 776 | .owner = THIS_MODULE, |
| 777 | }, |
| 778 | }; |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 779 | |
| 780 | static int __init st_kim_init(void) |
| 781 | { |
Pavan Savoy | ec60d0a | 2011-02-04 02:23:10 -0600 | [diff] [blame] | 782 | return platform_driver_register(&kim_platform_driver); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | static void __exit st_kim_deinit(void) |
| 786 | { |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 787 | platform_driver_unregister(&kim_platform_driver); |
Pavan Savoy | d0088ce | 2010-04-08 13:16:54 -0500 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | |
| 791 | module_init(st_kim_init); |
| 792 | module_exit(st_kim_deinit); |
| 793 | MODULE_AUTHOR("Pavan Savoy <pavan_savoy@ti.com>"); |
| 794 | MODULE_DESCRIPTION("Shared Transport Driver for TI BT/FM/GPS combo chips "); |
| 795 | MODULE_LICENSE("GPL"); |