Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * PTP 1588 clock using the EG20T PCH |
| 3 | * |
| 4 | * Copyright (C) 2010 OMICRON electronics GmbH |
| 5 | * Copyright (C) 2011-2012 LAPIS SEMICONDUCTOR Co., LTD. |
| 6 | * |
| 7 | * This code was derived from the IXP46X driver. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; version 2 of the License. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/device.h> |
| 24 | #include <linux/err.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/interrupt.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/irq.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/ptp_clock_kernel.h> |
Geert Uytterhoeven | 769b0da | 2012-05-16 01:50:17 +0000 | [diff] [blame] | 33 | #include <linux/slab.h> |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 34 | |
| 35 | #define STATION_ADDR_LEN 20 |
| 36 | #define PCI_DEVICE_ID_PCH_1588 0x8819 |
| 37 | #define IO_MEM_BAR 1 |
| 38 | |
| 39 | #define DEFAULT_ADDEND 0xA0000000 |
| 40 | #define TICKS_NS_SHIFT 5 |
| 41 | #define N_EXT_TS 2 |
| 42 | |
| 43 | enum pch_status { |
| 44 | PCH_SUCCESS, |
| 45 | PCH_INVALIDPARAM, |
| 46 | PCH_NOTIMESTAMP, |
| 47 | PCH_INTERRUPTMODEINUSE, |
| 48 | PCH_FAILED, |
| 49 | PCH_UNSUPPORTED, |
| 50 | }; |
| 51 | /** |
| 52 | * struct pch_ts_regs - IEEE 1588 registers |
| 53 | */ |
| 54 | struct pch_ts_regs { |
| 55 | u32 control; |
| 56 | u32 event; |
| 57 | u32 addend; |
| 58 | u32 accum; |
| 59 | u32 test; |
| 60 | u32 ts_compare; |
| 61 | u32 rsystime_lo; |
| 62 | u32 rsystime_hi; |
| 63 | u32 systime_lo; |
| 64 | u32 systime_hi; |
| 65 | u32 trgt_lo; |
| 66 | u32 trgt_hi; |
| 67 | u32 asms_lo; |
| 68 | u32 asms_hi; |
| 69 | u32 amms_lo; |
| 70 | u32 amms_hi; |
| 71 | u32 ch_control; |
| 72 | u32 ch_event; |
| 73 | u32 tx_snap_lo; |
| 74 | u32 tx_snap_hi; |
| 75 | u32 rx_snap_lo; |
| 76 | u32 rx_snap_hi; |
| 77 | u32 src_uuid_lo; |
| 78 | u32 src_uuid_hi; |
| 79 | u32 can_status; |
| 80 | u32 can_snap_lo; |
| 81 | u32 can_snap_hi; |
| 82 | u32 ts_sel; |
| 83 | u32 ts_st[6]; |
| 84 | u32 reserve1[14]; |
| 85 | u32 stl_max_set_en; |
| 86 | u32 stl_max_set; |
| 87 | u32 reserve2[13]; |
| 88 | u32 srst; |
| 89 | }; |
| 90 | |
| 91 | #define PCH_TSC_RESET (1 << 0) |
| 92 | #define PCH_TSC_TTM_MASK (1 << 1) |
| 93 | #define PCH_TSC_ASMS_MASK (1 << 2) |
| 94 | #define PCH_TSC_AMMS_MASK (1 << 3) |
| 95 | #define PCH_TSC_PPSM_MASK (1 << 4) |
| 96 | #define PCH_TSE_TTIPEND (1 << 1) |
| 97 | #define PCH_TSE_SNS (1 << 2) |
| 98 | #define PCH_TSE_SNM (1 << 3) |
| 99 | #define PCH_TSE_PPS (1 << 4) |
| 100 | #define PCH_CC_MM (1 << 0) |
| 101 | #define PCH_CC_TA (1 << 1) |
| 102 | |
| 103 | #define PCH_CC_MODE_SHIFT 16 |
| 104 | #define PCH_CC_MODE_MASK 0x001F0000 |
| 105 | #define PCH_CC_VERSION (1 << 31) |
| 106 | #define PCH_CE_TXS (1 << 0) |
| 107 | #define PCH_CE_RXS (1 << 1) |
| 108 | #define PCH_CE_OVR (1 << 0) |
| 109 | #define PCH_CE_VAL (1 << 1) |
| 110 | #define PCH_ECS_ETH (1 << 0) |
| 111 | |
| 112 | #define PCH_ECS_CAN (1 << 1) |
| 113 | #define PCH_STATION_BYTES 6 |
| 114 | |
| 115 | #define PCH_IEEE1588_ETH (1 << 0) |
| 116 | #define PCH_IEEE1588_CAN (1 << 1) |
| 117 | /** |
| 118 | * struct pch_dev - Driver private data |
| 119 | */ |
| 120 | struct pch_dev { |
| 121 | struct pch_ts_regs *regs; |
| 122 | struct ptp_clock *ptp_clock; |
| 123 | struct ptp_clock_info caps; |
| 124 | int exts0_enabled; |
| 125 | int exts1_enabled; |
| 126 | |
| 127 | u32 mem_base; |
| 128 | u32 mem_size; |
| 129 | u32 irq; |
| 130 | struct pci_dev *pdev; |
| 131 | spinlock_t register_lock; |
| 132 | }; |
| 133 | |
| 134 | /** |
| 135 | * struct pch_params - 1588 module parameter |
| 136 | */ |
| 137 | struct pch_params { |
| 138 | u8 station[STATION_ADDR_LEN]; |
| 139 | }; |
| 140 | |
| 141 | /* structure to hold the module parameters */ |
| 142 | static struct pch_params pch_param = { |
| 143 | "00:00:00:00:00:00" |
| 144 | }; |
| 145 | |
| 146 | /* |
| 147 | * Register access functions |
| 148 | */ |
| 149 | static inline void pch_eth_enable_set(struct pch_dev *chip) |
| 150 | { |
| 151 | u32 val; |
| 152 | /* SET the eth_enable bit */ |
| 153 | val = ioread32(&chip->regs->ts_sel) | (PCH_ECS_ETH); |
| 154 | iowrite32(val, (&chip->regs->ts_sel)); |
| 155 | } |
| 156 | |
| 157 | static u64 pch_systime_read(struct pch_ts_regs *regs) |
| 158 | { |
| 159 | u64 ns; |
| 160 | u32 lo, hi; |
| 161 | |
| 162 | lo = ioread32(®s->systime_lo); |
| 163 | hi = ioread32(®s->systime_hi); |
| 164 | |
| 165 | ns = ((u64) hi) << 32; |
| 166 | ns |= lo; |
| 167 | ns <<= TICKS_NS_SHIFT; |
| 168 | |
| 169 | return ns; |
| 170 | } |
| 171 | |
| 172 | static void pch_systime_write(struct pch_ts_regs *regs, u64 ns) |
| 173 | { |
| 174 | u32 hi, lo; |
| 175 | |
| 176 | ns >>= TICKS_NS_SHIFT; |
| 177 | hi = ns >> 32; |
| 178 | lo = ns & 0xffffffff; |
| 179 | |
| 180 | iowrite32(lo, ®s->systime_lo); |
| 181 | iowrite32(hi, ®s->systime_hi); |
| 182 | } |
| 183 | |
| 184 | static inline void pch_block_reset(struct pch_dev *chip) |
| 185 | { |
| 186 | u32 val; |
| 187 | /* Reset Hardware Assist block */ |
| 188 | val = ioread32(&chip->regs->control) | PCH_TSC_RESET; |
| 189 | iowrite32(val, (&chip->regs->control)); |
| 190 | val = val & ~PCH_TSC_RESET; |
| 191 | iowrite32(val, (&chip->regs->control)); |
| 192 | } |
| 193 | |
| 194 | u32 pch_ch_control_read(struct pci_dev *pdev) |
| 195 | { |
| 196 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 197 | u32 val; |
| 198 | |
| 199 | val = ioread32(&chip->regs->ch_control); |
| 200 | |
| 201 | return val; |
| 202 | } |
| 203 | EXPORT_SYMBOL(pch_ch_control_read); |
| 204 | |
| 205 | void pch_ch_control_write(struct pci_dev *pdev, u32 val) |
| 206 | { |
| 207 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 208 | |
| 209 | iowrite32(val, (&chip->regs->ch_control)); |
| 210 | } |
| 211 | EXPORT_SYMBOL(pch_ch_control_write); |
| 212 | |
| 213 | u32 pch_ch_event_read(struct pci_dev *pdev) |
| 214 | { |
| 215 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 216 | u32 val; |
| 217 | |
| 218 | val = ioread32(&chip->regs->ch_event); |
| 219 | |
| 220 | return val; |
| 221 | } |
| 222 | EXPORT_SYMBOL(pch_ch_event_read); |
| 223 | |
| 224 | void pch_ch_event_write(struct pci_dev *pdev, u32 val) |
| 225 | { |
| 226 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 227 | |
| 228 | iowrite32(val, (&chip->regs->ch_event)); |
| 229 | } |
| 230 | EXPORT_SYMBOL(pch_ch_event_write); |
| 231 | |
| 232 | u32 pch_src_uuid_lo_read(struct pci_dev *pdev) |
| 233 | { |
| 234 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 235 | u32 val; |
| 236 | |
| 237 | val = ioread32(&chip->regs->src_uuid_lo); |
| 238 | |
| 239 | return val; |
| 240 | } |
| 241 | EXPORT_SYMBOL(pch_src_uuid_lo_read); |
| 242 | |
| 243 | u32 pch_src_uuid_hi_read(struct pci_dev *pdev) |
| 244 | { |
| 245 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 246 | u32 val; |
| 247 | |
| 248 | val = ioread32(&chip->regs->src_uuid_hi); |
| 249 | |
| 250 | return val; |
| 251 | } |
| 252 | EXPORT_SYMBOL(pch_src_uuid_hi_read); |
| 253 | |
| 254 | u64 pch_rx_snap_read(struct pci_dev *pdev) |
| 255 | { |
| 256 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 257 | u64 ns; |
| 258 | u32 lo, hi; |
| 259 | |
| 260 | lo = ioread32(&chip->regs->rx_snap_lo); |
| 261 | hi = ioread32(&chip->regs->rx_snap_hi); |
| 262 | |
| 263 | ns = ((u64) hi) << 32; |
| 264 | ns |= lo; |
Takahiro Shimizu | d50566c | 2012-04-20 18:50:28 +0000 | [diff] [blame] | 265 | ns <<= TICKS_NS_SHIFT; |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 266 | |
| 267 | return ns; |
| 268 | } |
| 269 | EXPORT_SYMBOL(pch_rx_snap_read); |
| 270 | |
| 271 | u64 pch_tx_snap_read(struct pci_dev *pdev) |
| 272 | { |
| 273 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 274 | u64 ns; |
| 275 | u32 lo, hi; |
| 276 | |
| 277 | lo = ioread32(&chip->regs->tx_snap_lo); |
| 278 | hi = ioread32(&chip->regs->tx_snap_hi); |
| 279 | |
| 280 | ns = ((u64) hi) << 32; |
| 281 | ns |= lo; |
Takahiro Shimizu | d50566c | 2012-04-20 18:50:28 +0000 | [diff] [blame] | 282 | ns <<= TICKS_NS_SHIFT; |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 283 | |
| 284 | return ns; |
| 285 | } |
| 286 | EXPORT_SYMBOL(pch_tx_snap_read); |
| 287 | |
| 288 | /* This function enables all 64 bits in system time registers [high & low]. |
| 289 | This is a work-around for non continuous value in the SystemTime Register*/ |
| 290 | static void pch_set_system_time_count(struct pch_dev *chip) |
| 291 | { |
| 292 | iowrite32(0x01, &chip->regs->stl_max_set_en); |
| 293 | iowrite32(0xFFFFFFFF, &chip->regs->stl_max_set); |
| 294 | iowrite32(0x00, &chip->regs->stl_max_set_en); |
| 295 | } |
| 296 | |
| 297 | static void pch_reset(struct pch_dev *chip) |
| 298 | { |
| 299 | /* Reset Hardware Assist */ |
| 300 | pch_block_reset(chip); |
| 301 | |
| 302 | /* enable all 32 bits in system time registers */ |
| 303 | pch_set_system_time_count(chip); |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * pch_set_station_address() - This API sets the station address used by |
| 308 | * IEEE 1588 hardware when looking at PTP |
| 309 | * traffic on the ethernet interface |
| 310 | * @addr: dress which contain the column separated address to be used. |
| 311 | */ |
Takahiro Shimizu | 17cdedf | 2012-04-20 18:50:31 +0000 | [diff] [blame] | 312 | int pch_set_station_address(u8 *addr, struct pci_dev *pdev) |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 313 | { |
| 314 | s32 i; |
| 315 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 316 | |
| 317 | /* Verify the parameter */ |
| 318 | if ((chip->regs == 0) || addr == (u8 *)NULL) { |
| 319 | dev_err(&pdev->dev, |
| 320 | "invalid params returning PCH_INVALIDPARAM\n"); |
| 321 | return PCH_INVALIDPARAM; |
| 322 | } |
| 323 | /* For all station address bytes */ |
| 324 | for (i = 0; i < PCH_STATION_BYTES; i++) { |
| 325 | u32 val; |
| 326 | s32 tmp; |
| 327 | |
| 328 | tmp = hex_to_bin(addr[i * 3]); |
| 329 | if (tmp < 0) { |
| 330 | dev_err(&pdev->dev, |
| 331 | "invalid params returning PCH_INVALIDPARAM\n"); |
| 332 | return PCH_INVALIDPARAM; |
| 333 | } |
| 334 | val = tmp * 16; |
| 335 | tmp = hex_to_bin(addr[(i * 3) + 1]); |
| 336 | if (tmp < 0) { |
| 337 | dev_err(&pdev->dev, |
| 338 | "invalid params returning PCH_INVALIDPARAM\n"); |
| 339 | return PCH_INVALIDPARAM; |
| 340 | } |
| 341 | val += tmp; |
| 342 | /* Expects ':' separated addresses */ |
| 343 | if ((i < 5) && (addr[(i * 3) + 2] != ':')) { |
| 344 | dev_err(&pdev->dev, |
| 345 | "invalid params returning PCH_INVALIDPARAM\n"); |
| 346 | return PCH_INVALIDPARAM; |
| 347 | } |
| 348 | |
| 349 | /* Ideally we should set the address only after validating |
| 350 | entire string */ |
| 351 | dev_dbg(&pdev->dev, "invoking pch_station_set\n"); |
| 352 | iowrite32(val, &chip->regs->ts_st[i]); |
| 353 | } |
| 354 | return 0; |
| 355 | } |
Takahiro Shimizu | 17cdedf | 2012-04-20 18:50:31 +0000 | [diff] [blame] | 356 | EXPORT_SYMBOL(pch_set_station_address); |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 357 | |
| 358 | /* |
| 359 | * Interrupt service routine |
| 360 | */ |
| 361 | static irqreturn_t isr(int irq, void *priv) |
| 362 | { |
| 363 | struct pch_dev *pch_dev = priv; |
| 364 | struct pch_ts_regs *regs = pch_dev->regs; |
| 365 | struct ptp_clock_event event; |
| 366 | u32 ack = 0, lo, hi, val; |
| 367 | |
| 368 | val = ioread32(®s->event); |
| 369 | |
| 370 | if (val & PCH_TSE_SNS) { |
| 371 | ack |= PCH_TSE_SNS; |
| 372 | if (pch_dev->exts0_enabled) { |
| 373 | hi = ioread32(®s->asms_hi); |
| 374 | lo = ioread32(®s->asms_lo); |
| 375 | event.type = PTP_CLOCK_EXTTS; |
| 376 | event.index = 0; |
| 377 | event.timestamp = ((u64) hi) << 32; |
| 378 | event.timestamp |= lo; |
| 379 | event.timestamp <<= TICKS_NS_SHIFT; |
| 380 | ptp_clock_event(pch_dev->ptp_clock, &event); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | if (val & PCH_TSE_SNM) { |
| 385 | ack |= PCH_TSE_SNM; |
| 386 | if (pch_dev->exts1_enabled) { |
| 387 | hi = ioread32(®s->amms_hi); |
| 388 | lo = ioread32(®s->amms_lo); |
| 389 | event.type = PTP_CLOCK_EXTTS; |
| 390 | event.index = 1; |
| 391 | event.timestamp = ((u64) hi) << 32; |
| 392 | event.timestamp |= lo; |
| 393 | event.timestamp <<= TICKS_NS_SHIFT; |
| 394 | ptp_clock_event(pch_dev->ptp_clock, &event); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | if (val & PCH_TSE_TTIPEND) |
| 399 | ack |= PCH_TSE_TTIPEND; /* this bit seems to be always set */ |
| 400 | |
| 401 | if (ack) { |
| 402 | iowrite32(ack, ®s->event); |
| 403 | return IRQ_HANDLED; |
| 404 | } else |
| 405 | return IRQ_NONE; |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * PTP clock operations |
| 410 | */ |
| 411 | |
| 412 | static int ptp_pch_adjfreq(struct ptp_clock_info *ptp, s32 ppb) |
| 413 | { |
| 414 | u64 adj; |
| 415 | u32 diff, addend; |
| 416 | int neg_adj = 0; |
| 417 | struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps); |
| 418 | struct pch_ts_regs *regs = pch_dev->regs; |
| 419 | |
| 420 | if (ppb < 0) { |
| 421 | neg_adj = 1; |
| 422 | ppb = -ppb; |
| 423 | } |
| 424 | addend = DEFAULT_ADDEND; |
| 425 | adj = addend; |
| 426 | adj *= ppb; |
| 427 | diff = div_u64(adj, 1000000000ULL); |
| 428 | |
| 429 | addend = neg_adj ? addend - diff : addend + diff; |
| 430 | |
| 431 | iowrite32(addend, ®s->addend); |
| 432 | |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | static int ptp_pch_adjtime(struct ptp_clock_info *ptp, s64 delta) |
| 437 | { |
| 438 | s64 now; |
| 439 | unsigned long flags; |
| 440 | struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps); |
| 441 | struct pch_ts_regs *regs = pch_dev->regs; |
| 442 | |
| 443 | spin_lock_irqsave(&pch_dev->register_lock, flags); |
| 444 | now = pch_systime_read(regs); |
| 445 | now += delta; |
| 446 | pch_systime_write(regs, now); |
| 447 | spin_unlock_irqrestore(&pch_dev->register_lock, flags); |
| 448 | |
| 449 | return 0; |
| 450 | } |
| 451 | |
| 452 | static int ptp_pch_gettime(struct ptp_clock_info *ptp, struct timespec *ts) |
| 453 | { |
| 454 | u64 ns; |
| 455 | u32 remainder; |
| 456 | unsigned long flags; |
| 457 | struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps); |
| 458 | struct pch_ts_regs *regs = pch_dev->regs; |
| 459 | |
| 460 | spin_lock_irqsave(&pch_dev->register_lock, flags); |
| 461 | ns = pch_systime_read(regs); |
| 462 | spin_unlock_irqrestore(&pch_dev->register_lock, flags); |
| 463 | |
| 464 | ts->tv_sec = div_u64_rem(ns, 1000000000, &remainder); |
| 465 | ts->tv_nsec = remainder; |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static int ptp_pch_settime(struct ptp_clock_info *ptp, |
| 470 | const struct timespec *ts) |
| 471 | { |
| 472 | u64 ns; |
| 473 | unsigned long flags; |
| 474 | struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps); |
| 475 | struct pch_ts_regs *regs = pch_dev->regs; |
| 476 | |
| 477 | ns = ts->tv_sec * 1000000000ULL; |
| 478 | ns += ts->tv_nsec; |
| 479 | |
| 480 | spin_lock_irqsave(&pch_dev->register_lock, flags); |
| 481 | pch_systime_write(regs, ns); |
| 482 | spin_unlock_irqrestore(&pch_dev->register_lock, flags); |
| 483 | |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | static int ptp_pch_enable(struct ptp_clock_info *ptp, |
| 488 | struct ptp_clock_request *rq, int on) |
| 489 | { |
| 490 | struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps); |
| 491 | |
| 492 | switch (rq->type) { |
| 493 | case PTP_CLK_REQ_EXTTS: |
| 494 | switch (rq->extts.index) { |
| 495 | case 0: |
| 496 | pch_dev->exts0_enabled = on ? 1 : 0; |
| 497 | break; |
| 498 | case 1: |
| 499 | pch_dev->exts1_enabled = on ? 1 : 0; |
| 500 | break; |
| 501 | default: |
| 502 | return -EINVAL; |
| 503 | } |
| 504 | return 0; |
| 505 | default: |
| 506 | break; |
| 507 | } |
| 508 | |
| 509 | return -EOPNOTSUPP; |
| 510 | } |
| 511 | |
| 512 | static struct ptp_clock_info ptp_pch_caps = { |
| 513 | .owner = THIS_MODULE, |
| 514 | .name = "PCH timer", |
| 515 | .max_adj = 50000000, |
| 516 | .n_ext_ts = N_EXT_TS, |
| 517 | .pps = 0, |
| 518 | .adjfreq = ptp_pch_adjfreq, |
| 519 | .adjtime = ptp_pch_adjtime, |
| 520 | .gettime = ptp_pch_gettime, |
| 521 | .settime = ptp_pch_settime, |
| 522 | .enable = ptp_pch_enable, |
| 523 | }; |
| 524 | |
| 525 | |
| 526 | #ifdef CONFIG_PM |
| 527 | static s32 pch_suspend(struct pci_dev *pdev, pm_message_t state) |
| 528 | { |
| 529 | pci_disable_device(pdev); |
| 530 | pci_enable_wake(pdev, PCI_D3hot, 0); |
| 531 | |
| 532 | if (pci_save_state(pdev) != 0) { |
| 533 | dev_err(&pdev->dev, "could not save PCI config state\n"); |
| 534 | return -ENOMEM; |
| 535 | } |
| 536 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 537 | |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | static s32 pch_resume(struct pci_dev *pdev) |
| 542 | { |
| 543 | s32 ret; |
| 544 | |
| 545 | pci_set_power_state(pdev, PCI_D0); |
| 546 | pci_restore_state(pdev); |
| 547 | ret = pci_enable_device(pdev); |
| 548 | if (ret) { |
| 549 | dev_err(&pdev->dev, "pci_enable_device failed\n"); |
| 550 | return ret; |
| 551 | } |
| 552 | pci_enable_wake(pdev, PCI_D3hot, 0); |
| 553 | return 0; |
| 554 | } |
| 555 | #else |
| 556 | #define pch_suspend NULL |
| 557 | #define pch_resume NULL |
| 558 | #endif |
| 559 | |
Bill Pemberton | b1f7c8c | 2012-11-19 13:26:08 -0500 | [diff] [blame] | 560 | static void pch_remove(struct pci_dev *pdev) |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 561 | { |
| 562 | struct pch_dev *chip = pci_get_drvdata(pdev); |
| 563 | |
| 564 | ptp_clock_unregister(chip->ptp_clock); |
| 565 | /* free the interrupt */ |
| 566 | if (pdev->irq != 0) |
| 567 | free_irq(pdev->irq, chip); |
| 568 | |
| 569 | /* unmap the virtual IO memory space */ |
| 570 | if (chip->regs != 0) { |
| 571 | iounmap(chip->regs); |
| 572 | chip->regs = 0; |
| 573 | } |
| 574 | /* release the reserved IO memory space */ |
| 575 | if (chip->mem_base != 0) { |
| 576 | release_mem_region(chip->mem_base, chip->mem_size); |
| 577 | chip->mem_base = 0; |
| 578 | } |
| 579 | pci_disable_device(pdev); |
| 580 | kfree(chip); |
| 581 | dev_info(&pdev->dev, "complete\n"); |
| 582 | } |
| 583 | |
Bill Pemberton | 5c0a425 | 2012-11-19 13:23:28 -0500 | [diff] [blame] | 584 | static s32 |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 585 | pch_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| 586 | { |
| 587 | s32 ret; |
| 588 | unsigned long flags; |
| 589 | struct pch_dev *chip; |
| 590 | |
| 591 | chip = kzalloc(sizeof(struct pch_dev), GFP_KERNEL); |
| 592 | if (chip == NULL) |
| 593 | return -ENOMEM; |
| 594 | |
| 595 | /* enable the 1588 pci device */ |
| 596 | ret = pci_enable_device(pdev); |
| 597 | if (ret != 0) { |
| 598 | dev_err(&pdev->dev, "could not enable the pci device\n"); |
| 599 | goto err_pci_en; |
| 600 | } |
| 601 | |
| 602 | chip->mem_base = pci_resource_start(pdev, IO_MEM_BAR); |
| 603 | if (!chip->mem_base) { |
| 604 | dev_err(&pdev->dev, "could not locate IO memory address\n"); |
| 605 | ret = -ENODEV; |
| 606 | goto err_pci_start; |
| 607 | } |
| 608 | |
| 609 | /* retrieve the available length of the IO memory space */ |
| 610 | chip->mem_size = pci_resource_len(pdev, IO_MEM_BAR); |
| 611 | |
| 612 | /* allocate the memory for the device registers */ |
| 613 | if (!request_mem_region(chip->mem_base, chip->mem_size, "1588_regs")) { |
| 614 | dev_err(&pdev->dev, |
| 615 | "could not allocate register memory space\n"); |
| 616 | ret = -EBUSY; |
| 617 | goto err_req_mem_region; |
| 618 | } |
| 619 | |
| 620 | /* get the virtual address to the 1588 registers */ |
| 621 | chip->regs = ioremap(chip->mem_base, chip->mem_size); |
| 622 | |
| 623 | if (!chip->regs) { |
| 624 | dev_err(&pdev->dev, "Could not get virtual address\n"); |
| 625 | ret = -ENOMEM; |
| 626 | goto err_ioremap; |
| 627 | } |
| 628 | |
| 629 | chip->caps = ptp_pch_caps; |
Richard Cochran | 1ef7615 | 2012-09-22 07:02:03 +0000 | [diff] [blame] | 630 | chip->ptp_clock = ptp_clock_register(&chip->caps, &pdev->dev); |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 631 | |
| 632 | if (IS_ERR(chip->ptp_clock)) |
| 633 | return PTR_ERR(chip->ptp_clock); |
| 634 | |
| 635 | spin_lock_init(&chip->register_lock); |
| 636 | |
| 637 | ret = request_irq(pdev->irq, &isr, IRQF_SHARED, KBUILD_MODNAME, chip); |
| 638 | if (ret != 0) { |
| 639 | dev_err(&pdev->dev, "failed to get irq %d\n", pdev->irq); |
| 640 | goto err_req_irq; |
| 641 | } |
| 642 | |
| 643 | /* indicate success */ |
| 644 | chip->irq = pdev->irq; |
| 645 | chip->pdev = pdev; |
| 646 | pci_set_drvdata(pdev, chip); |
| 647 | |
| 648 | spin_lock_irqsave(&chip->register_lock, flags); |
| 649 | /* reset the ieee1588 h/w */ |
| 650 | pch_reset(chip); |
| 651 | |
| 652 | iowrite32(DEFAULT_ADDEND, &chip->regs->addend); |
| 653 | iowrite32(1, &chip->regs->trgt_lo); |
| 654 | iowrite32(0, &chip->regs->trgt_hi); |
| 655 | iowrite32(PCH_TSE_TTIPEND, &chip->regs->event); |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 656 | |
| 657 | pch_eth_enable_set(chip); |
| 658 | |
| 659 | if (strcmp(pch_param.station, "00:00:00:00:00:00") != 0) { |
| 660 | if (pch_set_station_address(pch_param.station, pdev) != 0) { |
| 661 | dev_err(&pdev->dev, |
| 662 | "Invalid station address parameter\n" |
| 663 | "Module loaded but station address not set correctly\n" |
| 664 | ); |
| 665 | } |
| 666 | } |
| 667 | spin_unlock_irqrestore(&chip->register_lock, flags); |
| 668 | return 0; |
| 669 | |
| 670 | err_req_irq: |
| 671 | ptp_clock_unregister(chip->ptp_clock); |
| 672 | iounmap(chip->regs); |
| 673 | chip->regs = 0; |
| 674 | |
| 675 | err_ioremap: |
| 676 | release_mem_region(chip->mem_base, chip->mem_size); |
| 677 | |
| 678 | err_req_mem_region: |
| 679 | chip->mem_base = 0; |
| 680 | |
| 681 | err_pci_start: |
| 682 | pci_disable_device(pdev); |
| 683 | |
| 684 | err_pci_en: |
| 685 | kfree(chip); |
| 686 | dev_err(&pdev->dev, "probe failed(ret=0x%x)\n", ret); |
| 687 | |
| 688 | return ret; |
| 689 | } |
| 690 | |
| 691 | static DEFINE_PCI_DEVICE_TABLE(pch_ieee1588_pcidev_id) = { |
| 692 | { |
| 693 | .vendor = PCI_VENDOR_ID_INTEL, |
| 694 | .device = PCI_DEVICE_ID_PCH_1588 |
| 695 | }, |
| 696 | {0} |
| 697 | }; |
| 698 | |
David S. Miller | d8d78949 | 2012-03-09 14:47:24 -0800 | [diff] [blame] | 699 | static struct pci_driver pch_driver = { |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 700 | .name = KBUILD_MODNAME, |
| 701 | .id_table = pch_ieee1588_pcidev_id, |
| 702 | .probe = pch_probe, |
| 703 | .remove = pch_remove, |
| 704 | .suspend = pch_suspend, |
| 705 | .resume = pch_resume, |
| 706 | }; |
| 707 | |
| 708 | static void __exit ptp_pch_exit(void) |
| 709 | { |
David S. Miller | d8d78949 | 2012-03-09 14:47:24 -0800 | [diff] [blame] | 710 | pci_unregister_driver(&pch_driver); |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 711 | } |
| 712 | |
| 713 | static s32 __init ptp_pch_init(void) |
| 714 | { |
| 715 | s32 ret; |
| 716 | |
| 717 | /* register the driver with the pci core */ |
David S. Miller | d8d78949 | 2012-03-09 14:47:24 -0800 | [diff] [blame] | 718 | ret = pci_register_driver(&pch_driver); |
Takahiro Shimizu | 863d08e | 2012-03-07 22:16:26 +0000 | [diff] [blame] | 719 | |
| 720 | return ret; |
| 721 | } |
| 722 | |
| 723 | module_init(ptp_pch_init); |
| 724 | module_exit(ptp_pch_exit); |
| 725 | |
| 726 | module_param_string(station, pch_param.station, sizeof pch_param.station, 0444); |
| 727 | MODULE_PARM_DESC(station, |
| 728 | "IEEE 1588 station address to use - column separated hex values"); |
| 729 | |
| 730 | MODULE_AUTHOR("LAPIS SEMICONDUCTOR, <tshimizu818@gmail.com>"); |
| 731 | MODULE_DESCRIPTION("PTP clock using the EG20T timer"); |
| 732 | MODULE_LICENSE("GPL"); |