target/linux/ipq806x/patches/0124-ata-move-library-code-from-ahci_platform.c-to-libahc.patch

   1 From 04800db1047afbf6701379435bff1a6fa64215f7 Mon Sep 17 00:00:00 2001
   2 From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
   3 Date: Tue, 25 Mar 2014 19:51:39 +0100
   4 Subject: [PATCH 124/182] ata: move library code from ahci_platform.c to
   5  libahci_platform.c
   6
   7 Move AHCI platform library code from ahci_platform.c to
   8 libahci_platform.c and fix dependencies for ahci_st,
   9 ahci_imx and ahci_sunxi drivers.
  10
  11 Acked-by: Hans de Goede <hdegoede@redhat.com>
  12 Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
  13 Signed-off-by: Tejun Heo <tj@kernel.org>
  14
  15 Conflicts:
  16         drivers/ata/Kconfig
  17         drivers/ata/Makefile
  18 ---
  19  drivers/ata/Kconfig            |    2 +-
  20  drivers/ata/Makefile           |    4 +-
  21  drivers/ata/ahci_platform.c    |  515 --------------------------------------
  22  drivers/ata/libahci_platform.c |  541 ++++++++++++++++++++++++++++++++++++++++
  23  4 files changed, 544 insertions(+), 518 deletions(-)
  24  create mode 100644 drivers/ata/libahci_platform.c
  25
  26 --- a/drivers/ata/Kconfig
  27 +++ b/drivers/ata/Kconfig
  28 @@ -99,7 +99,7 @@ config SATA_AHCI_PLATFORM
  29
  30  config AHCI_IMX
  31         tristate "Freescale i.MX AHCI SATA support"
  32 -       depends on SATA_AHCI_PLATFORM && MFD_SYSCON
  33 +       depends on MFD_SYSCON
  34         help
  35           This option enables support for the Freescale i.MX SoC's
  36           onboard AHCI SATA.
  37 --- a/drivers/ata/Makefile
  38 +++ b/drivers/ata/Makefile
  39 @@ -4,13 +4,13 @@ obj-$(CONFIG_ATA)             += libata.o
  40  # non-SFF interface
  41  obj-$(CONFIG_SATA_AHCI)                += ahci.o libahci.o
  42  obj-$(CONFIG_SATA_ACARD_AHCI)  += acard-ahci.o libahci.o
  43 -obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o
  44 +obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o libahci_platform.o
  45  obj-$(CONFIG_SATA_FSL)         += sata_fsl.o
  46  obj-$(CONFIG_SATA_INIC162X)    += sata_inic162x.o
  47  obj-$(CONFIG_SATA_SIL24)       += sata_sil24.o
  48  obj-$(CONFIG_SATA_DWC)         += sata_dwc_460ex.o
  49  obj-$(CONFIG_SATA_HIGHBANK)    += sata_highbank.o libahci.o
  50 -obj-$(CONFIG_AHCI_IMX)         += ahci_imx.o
  51 +obj-$(CONFIG_AHCI_IMX)         += ahci_imx.o libahci.o libahci_platform.o
  52
  53  # SFF w/ custom DMA
  54  obj-$(CONFIG_PDC_ADMA)         += pdc_adma.o
  55 --- a/drivers/ata/ahci_platform.c
  56 +++ b/drivers/ata/ahci_platform.c
  57 @@ -12,28 +12,15 @@
  58   * any later version.
  59   */
  60
  61 -#include <linux/clk.h>
  62  #include <linux/kernel.h>
  63 -#include <linux/gfp.h>
  64  #include <linux/module.h>
  65  #include <linux/pm.h>
  66 -#include <linux/interrupt.h>
  67  #include <linux/device.h>
  68  #include <linux/platform_device.h>
  69  #include <linux/libata.h>
  70  #include <linux/ahci_platform.h>
  71 -#include <linux/phy/phy.h>
  72 -#include <linux/pm_runtime.h>
  73  #include "ahci.h"
  74
  75 -static void ahci_host_stop(struct ata_host *host);
  76 -
  77 -struct ata_port_operations ahci_platform_ops = {
  78 -       .inherits       = &ahci_ops,
  79 -       .host_stop      = ahci_host_stop,
  80 -};
  81 -EXPORT_SYMBOL_GPL(ahci_platform_ops);
  82 -
  83  static const struct ata_port_info ahci_port_info = {
  84         .flags          = AHCI_FLAG_COMMON,
  85         .pio_mask       = ATA_PIO4,
  86 @@ -41,345 +28,6 @@ static const struct ata_port_info ahci_p
  87         .port_ops       = &ahci_platform_ops,
  88  };
  89
  90 -static struct scsi_host_template ahci_platform_sht = {
  91 -       AHCI_SHT("ahci_platform"),
  92 -};
  93 -
  94 -/**
  95 - * ahci_platform_enable_clks - Enable platform clocks
  96 - * @hpriv: host private area to store config values
  97 - *
  98 - * This function enables all the clks found in hpriv->clks, starting at
  99 - * index 0. If any clk fails to enable it disables all the clks already
 100 - * enabled in reverse order, and then returns an error.
 101 - *
 102 - * RETURNS:
 103 - * 0 on success otherwise a negative error code
 104 - */
 105 -int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
 106 -{
 107 -       int c, rc;
 108 -
 109 -       for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
 110 -               rc = clk_prepare_enable(hpriv->clks[c]);
 111 -               if (rc)
 112 -                       goto disable_unprepare_clk;
 113 -       }
 114 -       return 0;
 115 -
 116 -disable_unprepare_clk:
 117 -       while (--c >= 0)
 118 -               clk_disable_unprepare(hpriv->clks[c]);
 119 -       return rc;
 120 -}
 121 -EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
 122 -
 123 -/**
 124 - * ahci_platform_disable_clks - Disable platform clocks
 125 - * @hpriv: host private area to store config values
 126 - *
 127 - * This function disables all the clks found in hpriv->clks, in reverse
 128 - * order of ahci_platform_enable_clks (starting at the end of the array).
 129 - */
 130 -void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
 131 -{
 132 -       int c;
 133 -
 134 -       for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
 135 -               if (hpriv->clks[c])
 136 -                       clk_disable_unprepare(hpriv->clks[c]);
 137 -}
 138 -EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
 139 -
 140 -/**
 141 - * ahci_platform_enable_resources - Enable platform resources
 142 - * @hpriv: host private area to store config values
 143 - *
 144 - * This function enables all ahci_platform managed resources in the
 145 - * following order:
 146 - * 1) Regulator
 147 - * 2) Clocks (through ahci_platform_enable_clks)
 148 - * 3) Phy
 149 - *
 150 - * If resource enabling fails at any point the previous enabled resources
 151 - * are disabled in reverse order.
 152 - *
 153 - * RETURNS:
 154 - * 0 on success otherwise a negative error code
 155 - */
 156 -int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
 157 -{
 158 -       int rc;
 159 -
 160 -       if (hpriv->target_pwr) {
 161 -               rc = regulator_enable(hpriv->target_pwr);
 162 -               if (rc)
 163 -                       return rc;
 164 -       }
 165 -
 166 -       rc = ahci_platform_enable_clks(hpriv);
 167 -       if (rc)
 168 -               goto disable_regulator;
 169 -
 170 -       if (hpriv->phy) {
 171 -               rc = phy_init(hpriv->phy);
 172 -               if (rc)
 173 -                       goto disable_clks;
 174 -
 175 -               rc = phy_power_on(hpriv->phy);
 176 -               if (rc) {
 177 -                       phy_exit(hpriv->phy);
 178 -                       goto disable_clks;
 179 -               }
 180 -       }
 181 -
 182 -       return 0;
 183 -
 184 -disable_clks:
 185 -       ahci_platform_disable_clks(hpriv);
 186 -
 187 -disable_regulator:
 188 -       if (hpriv->target_pwr)
 189 -               regulator_disable(hpriv->target_pwr);
 190 -       return rc;
 191 -}
 192 -EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
 193 -
 194 -/**
 195 - * ahci_platform_disable_resources - Disable platform resources
 196 - * @hpriv: host private area to store config values
 197 - *
 198 - * This function disables all ahci_platform managed resources in the
 199 - * following order:
 200 - * 1) Phy
 201 - * 2) Clocks (through ahci_platform_disable_clks)
 202 - * 3) Regulator
 203 - */
 204 -void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
 205 -{
 206 -       if (hpriv->phy) {
 207 -               phy_power_off(hpriv->phy);
 208 -               phy_exit(hpriv->phy);
 209 -       }
 210 -
 211 -       ahci_platform_disable_clks(hpriv);
 212 -
 213 -       if (hpriv->target_pwr)
 214 -               regulator_disable(hpriv->target_pwr);
 215 -}
 216 -EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
 217 -
 218 -static void ahci_platform_put_resources(struct device *dev, void *res)
 219 -{
 220 -       struct ahci_host_priv *hpriv = res;
 221 -       int c;
 222 -
 223 -       if (hpriv->got_runtime_pm) {
 224 -               pm_runtime_put_sync(dev);
 225 -               pm_runtime_disable(dev);
 226 -       }
 227 -
 228 -       for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
 229 -               clk_put(hpriv->clks[c]);
 230 -}
 231 -
 232 -/**
 233 - * ahci_platform_get_resources - Get platform resources
 234 - * @pdev: platform device to get resources for
 235 - *
 236 - * This function allocates an ahci_host_priv struct, and gets the following
 237 - * resources, storing a reference to them inside the returned struct:
 238 - *
 239 - * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
 240 - * 2) regulator for controlling the targets power (optional)
 241 - * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
 242 - *    or for non devicetree enabled platforms a single clock
 243 - *     4) phy (optional)
 244 - *
 245 - * RETURNS:
 246 - * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
 247 - */
 248 -struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 249 -{
 250 -       struct device *dev = &pdev->dev;
 251 -       struct ahci_host_priv *hpriv;
 252 -       struct clk *clk;
 253 -       int i, rc = -ENOMEM;
 254 -
 255 -       if (!devres_open_group(dev, NULL, GFP_KERNEL))
 256 -               return ERR_PTR(-ENOMEM);
 257 -
 258 -       hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
 259 -                            GFP_KERNEL);
 260 -       if (!hpriv)
 261 -               goto err_out;
 262 -
 263 -       devres_add(dev, hpriv);
 264 -
 265 -       hpriv->mmio = devm_ioremap_resource(dev,
 266 -                             platform_get_resource(pdev, IORESOURCE_MEM, 0));
 267 -       if (IS_ERR(hpriv->mmio)) {
 268 -               dev_err(dev, "no mmio space\n");
 269 -               rc = PTR_ERR(hpriv->mmio);
 270 -               goto err_out;
 271 -       }
 272 -
 273 -       hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
 274 -       if (IS_ERR(hpriv->target_pwr)) {
 275 -               rc = PTR_ERR(hpriv->target_pwr);
 276 -               if (rc == -EPROBE_DEFER)
 277 -                       goto err_out;
 278 -               hpriv->target_pwr = NULL;
 279 -       }
 280 -
 281 -       for (i = 0; i < AHCI_MAX_CLKS; i++) {
 282 -               /*
 283 -                * For now we must use clk_get(dev, NULL) for the first clock,
 284 -                * because some platforms (da850, spear13xx) are not yet
 285 -                * converted to use devicetree for clocks.  For new platforms
 286 -                * this is equivalent to of_clk_get(dev->of_node, 0).
 287 -                */
 288 -               if (i == 0)
 289 -                       clk = clk_get(dev, NULL);
 290 -               else
 291 -                       clk = of_clk_get(dev->of_node, i);
 292 -
 293 -               if (IS_ERR(clk)) {
 294 -                       rc = PTR_ERR(clk);
 295 -                       if (rc == -EPROBE_DEFER)
 296 -                               goto err_out;
 297 -                       break;
 298 -               }
 299 -               hpriv->clks[i] = clk;
 300 -       }
 301 -
 302 -       hpriv->phy = devm_phy_get(dev, "sata-phy");
 303 -       if (IS_ERR(hpriv->phy)) {
 304 -               rc = PTR_ERR(hpriv->phy);
 305 -               switch (rc) {
 306 -               case -ENODEV:
 307 -               case -ENOSYS:
 308 -                       /* continue normally */
 309 -                       hpriv->phy = NULL;
 310 -                       break;
 311 -
 312 -               case -EPROBE_DEFER:
 313 -                       goto err_out;
 314 -
 315 -               default:
 316 -                       dev_err(dev, "couldn't get sata-phy\n");
 317 -                       goto err_out;
 318 -               }
 319 -       }
 320 -
 321 -       pm_runtime_enable(dev);
 322 -       pm_runtime_get_sync(dev);
 323 -       hpriv->got_runtime_pm = true;
 324 -
 325 -       devres_remove_group(dev, NULL);
 326 -       return hpriv;
 327 -
 328 -err_out:
 329 -       devres_release_group(dev, NULL);
 330 -       return ERR_PTR(rc);
 331 -}
 332 -EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
 333 -
 334 -/**
 335 - * ahci_platform_init_host - Bring up an ahci-platform host
 336 - * @pdev: platform device pointer for the host
 337 - * @hpriv: ahci-host private data for the host
 338 - * @pi_template: template for the ata_port_info to use
 339 - * @force_port_map: param passed to ahci_save_initial_config
 340 - * @mask_port_map: param passed to ahci_save_initial_config
 341 - *
 342 - * This function does all the usual steps needed to bring up an
 343 - * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
 344 - * must be initialized / enabled before calling this.
 345 - *
 346 - * RETURNS:
 347 - * 0 on success otherwise a negative error code
 348 - */
 349 -int ahci_platform_init_host(struct platform_device *pdev,
 350 -                           struct ahci_host_priv *hpriv,
 351 -                           const struct ata_port_info *pi_template,
 352 -                           unsigned int force_port_map,
 353 -                           unsigned int mask_port_map)
 354 -{
 355 -       struct device *dev = &pdev->dev;
 356 -       struct ata_port_info pi = *pi_template;
 357 -       const struct ata_port_info *ppi[] = { &pi, NULL };
 358 -       struct ata_host *host;
 359 -       int i, irq, n_ports, rc;
 360 -
 361 -       irq = platform_get_irq(pdev, 0);
 362 -       if (irq <= 0) {
 363 -               dev_err(dev, "no irq\n");
 364 -               return -EINVAL;
 365 -       }
 366 -
 367 -       /* prepare host */
 368 -       hpriv->flags |= (unsigned long)pi.private_data;
 369 -
 370 -       ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
 371 -
 372 -       if (hpriv->cap & HOST_CAP_NCQ)
 373 -               pi.flags |= ATA_FLAG_NCQ;
 374 -
 375 -       if (hpriv->cap & HOST_CAP_PMP)
 376 -               pi.flags |= ATA_FLAG_PMP;
 377 -
 378 -       ahci_set_em_messages(hpriv, &pi);
 379 -
 380 -       /* CAP.NP sometimes indicate the index of the last enabled
 381 -        * port, at other times, that of the last possible port, so
 382 -        * determining the maximum port number requires looking at
 383 -        * both CAP.NP and port_map.
 384 -        */
 385 -       n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
 386 -
 387 -       host = ata_host_alloc_pinfo(dev, ppi, n_ports);
 388 -       if (!host)
 389 -               return -ENOMEM;
 390 -
 391 -       host->private_data = hpriv;
 392 -
 393 -       if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
 394 -               host->flags |= ATA_HOST_PARALLEL_SCAN;
 395 -       else
 396 -               dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
 397 -
 398 -       if (pi.flags & ATA_FLAG_EM)
 399 -               ahci_reset_em(host);
 400 -
 401 -       for (i = 0; i < host->n_ports; i++) {
 402 -               struct ata_port *ap = host->ports[i];
 403 -
 404 -               ata_port_desc(ap, "mmio %pR",
 405 -                             platform_get_resource(pdev, IORESOURCE_MEM, 0));
 406 -               ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
 407 -
 408 -               /* set enclosure management message type */
 409 -               if (ap->flags & ATA_FLAG_EM)
 410 -                       ap->em_message_type = hpriv->em_msg_type;
 411 -
 412 -               /* disabled/not-implemented port */
 413 -               if (!(hpriv->port_map & (1 << i)))
 414 -                       ap->ops = &ata_dummy_port_ops;
 415 -       }
 416 -
 417 -       rc = ahci_reset_controller(host);
 418 -       if (rc)
 419 -               return rc;
 420 -
 421 -       ahci_init_controller(host);
 422 -       ahci_print_info(host, "platform");
 423 -
 424 -       return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
 425 -                                &ahci_platform_sht);
 426 -}
 427 -EXPORT_SYMBOL_GPL(ahci_platform_init_host);
 428 -
 429  static int ahci_probe(struct platform_device *pdev)
 430  {
 431         struct device *dev = &pdev->dev;
 432 @@ -420,169 +68,6 @@ disable_resources:
 433         return rc;
 434  }
 435
 436 -static void ahci_host_stop(struct ata_host *host)
 437 -{
 438 -       struct device *dev = host->dev;
 439 -       struct ahci_platform_data *pdata = dev_get_platdata(dev);
 440 -       struct ahci_host_priv *hpriv = host->private_data;
 441 -
 442 -       if (pdata && pdata->exit)
 443 -               pdata->exit(dev);
 444 -
 445 -       ahci_platform_disable_resources(hpriv);
 446 -}
 447 -
 448 -#ifdef CONFIG_PM_SLEEP
 449 -/**
 450 - * ahci_platform_suspend_host - Suspend an ahci-platform host
 451 - * @dev: device pointer for the host
 452 - *
 453 - * This function does all the usual steps needed to suspend an
 454 - * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
 455 - * must be disabled after calling this.
 456 - *
 457 - * RETURNS:
 458 - * 0 on success otherwise a negative error code
 459 - */
 460 -int ahci_platform_suspend_host(struct device *dev)
 461 -{
 462 -       struct ata_host *host = dev_get_drvdata(dev);
 463 -       struct ahci_host_priv *hpriv = host->private_data;
 464 -       void __iomem *mmio = hpriv->mmio;
 465 -       u32 ctl;
 466 -
 467 -       if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
 468 -               dev_err(dev, "firmware update required for suspend/resume\n");
 469 -               return -EIO;
 470 -       }
 471 -
 472 -       /*
 473 -        * AHCI spec rev1.1 section 8.3.3:
 474 -        * Software must disable interrupts prior to requesting a
 475 -        * transition of the HBA to D3 state.
 476 -        */
 477 -       ctl = readl(mmio + HOST_CTL);
 478 -       ctl &= ~HOST_IRQ_EN;
 479 -       writel(ctl, mmio + HOST_CTL);
 480 -       readl(mmio + HOST_CTL); /* flush */
 481 -
 482 -       return ata_host_suspend(host, PMSG_SUSPEND);
 483 -}
 484 -EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
 485 -
 486 -/**
 487 - * ahci_platform_resume_host - Resume an ahci-platform host
 488 - * @dev: device pointer for the host
 489 - *
 490 - * This function does all the usual steps needed to resume an ahci-platform
 491 - * host, note any necessary resources (ie clks, phy, etc.)  must be
 492 - * initialized / enabled before calling this.
 493 - *
 494 - * RETURNS:
 495 - * 0 on success otherwise a negative error code
 496 - */
 497 -int ahci_platform_resume_host(struct device *dev)
 498 -{
 499 -       struct ata_host *host = dev_get_drvdata(dev);
 500 -       int rc;
 501 -
 502 -       if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
 503 -               rc = ahci_reset_controller(host);
 504 -               if (rc)
 505 -                       return rc;
 506 -
 507 -               ahci_init_controller(host);
 508 -       }
 509 -
 510 -       ata_host_resume(host);
 511 -
 512 -       return 0;
 513 -}
 514 -EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
 515 -
 516 -/**
 517 - * ahci_platform_suspend - Suspend an ahci-platform device
 518 - * @dev: the platform device to suspend
 519 - *
 520 - * This function suspends the host associated with the device, followed by
 521 - * disabling all the resources of the device.
 522 - *
 523 - * RETURNS:
 524 - * 0 on success otherwise a negative error code
 525 - */
 526 -int ahci_platform_suspend(struct device *dev)
 527 -{
 528 -       struct ahci_platform_data *pdata = dev_get_platdata(dev);
 529 -       struct ata_host *host = dev_get_drvdata(dev);
 530 -       struct ahci_host_priv *hpriv = host->private_data;
 531 -       int rc;
 532 -
 533 -       rc = ahci_platform_suspend_host(dev);
 534 -       if (rc)
 535 -               return rc;
 536 -
 537 -       if (pdata && pdata->suspend) {
 538 -               rc = pdata->suspend(dev);
 539 -               if (rc)
 540 -                       goto resume_host;
 541 -       }
 542 -
 543 -       ahci_platform_disable_resources(hpriv);
 544 -
 545 -       return 0;
 546 -
 547 -resume_host:
 548 -       ahci_platform_resume_host(dev);
 549 -       return rc;
 550 -}
 551 -EXPORT_SYMBOL_GPL(ahci_platform_suspend);
 552 -
 553 -/**
 554 - * ahci_platform_resume - Resume an ahci-platform device
 555 - * @dev: the platform device to resume
 556 - *
 557 - * This function enables all the resources of the device followed by
 558 - * resuming the host associated with the device.
 559 - *
 560 - * RETURNS:
 561 - * 0 on success otherwise a negative error code
 562 - */
 563 -int ahci_platform_resume(struct device *dev)
 564 -{
 565 -       struct ahci_platform_data *pdata = dev_get_platdata(dev);
 566 -       struct ata_host *host = dev_get_drvdata(dev);
 567 -       struct ahci_host_priv *hpriv = host->private_data;
 568 -       int rc;
 569 -
 570 -       rc = ahci_platform_enable_resources(hpriv);
 571 -       if (rc)
 572 -               return rc;
 573 -
 574 -       if (pdata && pdata->resume) {
 575 -               rc = pdata->resume(dev);
 576 -               if (rc)
 577 -                       goto disable_resources;
 578 -       }
 579 -
 580 -       rc = ahci_platform_resume_host(dev);
 581 -       if (rc)
 582 -               goto disable_resources;
 583 -
 584 -       /* We resumed so update PM runtime state */
 585 -       pm_runtime_disable(dev);
 586 -       pm_runtime_set_active(dev);
 587 -       pm_runtime_enable(dev);
 588 -
 589 -       return 0;
 590 -
 591 -disable_resources:
 592 -       ahci_platform_disable_resources(hpriv);
 593 -
 594 -       return rc;
 595 -}
 596 -EXPORT_SYMBOL_GPL(ahci_platform_resume);
 597 -#endif
 598 -
 599  static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
 600                          ahci_platform_resume);
 601
 602 --- /dev/null
 603 +++ b/drivers/ata/libahci_platform.c
 604 @@ -0,0 +1,541 @@
 605 +/*
 606 + * AHCI SATA platform library
 607 + *
 608 + * Copyright 2004-2005  Red Hat, Inc.
 609 + *   Jeff Garzik <jgarzik@pobox.com>
 610 + * Copyright 2010  MontaVista Software, LLC.
 611 + *   Anton Vorontsov <avorontsov@ru.mvista.com>
 612 + *
 613 + * This program is free software; you can redistribute it and/or modify
 614 + * it under the terms of the GNU General Public License as published by
 615 + * the Free Software Foundation; either version 2, or (at your option)
 616 + * any later version.
 617 + */
 618 +
 619 +#include <linux/clk.h>
 620 +#include <linux/kernel.h>
 621 +#include <linux/gfp.h>
 622 +#include <linux/module.h>
 623 +#include <linux/pm.h>
 624 +#include <linux/interrupt.h>
 625 +#include <linux/device.h>
 626 +#include <linux/platform_device.h>
 627 +#include <linux/libata.h>
 628 +#include <linux/ahci_platform.h>
 629 +#include <linux/phy/phy.h>
 630 +#include <linux/pm_runtime.h>
 631 +#include "ahci.h"
 632 +
 633 +static void ahci_host_stop(struct ata_host *host);
 634 +
 635 +struct ata_port_operations ahci_platform_ops = {
 636 +       .inherits       = &ahci_ops,
 637 +       .host_stop      = ahci_host_stop,
 638 +};
 639 +EXPORT_SYMBOL_GPL(ahci_platform_ops);
 640 +
 641 +static struct scsi_host_template ahci_platform_sht = {
 642 +       AHCI_SHT("ahci_platform"),
 643 +};
 644 +
 645 +/**
 646 + * ahci_platform_enable_clks - Enable platform clocks
 647 + * @hpriv: host private area to store config values
 648 + *
 649 + * This function enables all the clks found in hpriv->clks, starting at
 650 + * index 0. If any clk fails to enable it disables all the clks already
 651 + * enabled in reverse order, and then returns an error.
 652 + *
 653 + * RETURNS:
 654 + * 0 on success otherwise a negative error code
 655 + */
 656 +int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
 657 +{
 658 +       int c, rc;
 659 +
 660 +       for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
 661 +               rc = clk_prepare_enable(hpriv->clks[c]);
 662 +               if (rc)
 663 +                       goto disable_unprepare_clk;
 664 +       }
 665 +       return 0;
 666 +
 667 +disable_unprepare_clk:
 668 +       while (--c >= 0)
 669 +               clk_disable_unprepare(hpriv->clks[c]);
 670 +       return rc;
 671 +}
 672 +EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
 673 +
 674 +/**
 675 + * ahci_platform_disable_clks - Disable platform clocks
 676 + * @hpriv: host private area to store config values
 677 + *
 678 + * This function disables all the clks found in hpriv->clks, in reverse
 679 + * order of ahci_platform_enable_clks (starting at the end of the array).
 680 + */
 681 +void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
 682 +{
 683 +       int c;
 684 +
 685 +       for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
 686 +               if (hpriv->clks[c])
 687 +                       clk_disable_unprepare(hpriv->clks[c]);
 688 +}
 689 +EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
 690 +
 691 +/**
 692 + * ahci_platform_enable_resources - Enable platform resources
 693 + * @hpriv: host private area to store config values
 694 + *
 695 + * This function enables all ahci_platform managed resources in the
 696 + * following order:
 697 + * 1) Regulator
 698 + * 2) Clocks (through ahci_platform_enable_clks)
 699 + * 3) Phy
 700 + *
 701 + * If resource enabling fails at any point the previous enabled resources
 702 + * are disabled in reverse order.
 703 + *
 704 + * RETURNS:
 705 + * 0 on success otherwise a negative error code
 706 + */
 707 +int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
 708 +{
 709 +       int rc;
 710 +
 711 +       if (hpriv->target_pwr) {
 712 +               rc = regulator_enable(hpriv->target_pwr);
 713 +               if (rc)
 714 +                       return rc;
 715 +       }
 716 +
 717 +       rc = ahci_platform_enable_clks(hpriv);
 718 +       if (rc)
 719 +               goto disable_regulator;
 720 +
 721 +       if (hpriv->phy) {
 722 +               rc = phy_init(hpriv->phy);
 723 +               if (rc)
 724 +                       goto disable_clks;
 725 +
 726 +               rc = phy_power_on(hpriv->phy);
 727 +               if (rc) {
 728 +                       phy_exit(hpriv->phy);
 729 +                       goto disable_clks;
 730 +               }
 731 +       }
 732 +
 733 +       return 0;
 734 +
 735 +disable_clks:
 736 +       ahci_platform_disable_clks(hpriv);
 737 +
 738 +disable_regulator:
 739 +       if (hpriv->target_pwr)
 740 +               regulator_disable(hpriv->target_pwr);
 741 +       return rc;
 742 +}
 743 +EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
 744 +
 745 +/**
 746 + * ahci_platform_disable_resources - Disable platform resources
 747 + * @hpriv: host private area to store config values
 748 + *
 749 + * This function disables all ahci_platform managed resources in the
 750 + * following order:
 751 + * 1) Phy
 752 + * 2) Clocks (through ahci_platform_disable_clks)
 753 + * 3) Regulator
 754 + */
 755 +void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
 756 +{
 757 +       if (hpriv->phy) {
 758 +               phy_power_off(hpriv->phy);
 759 +               phy_exit(hpriv->phy);
 760 +       }
 761 +
 762 +       ahci_platform_disable_clks(hpriv);
 763 +
 764 +       if (hpriv->target_pwr)
 765 +               regulator_disable(hpriv->target_pwr);
 766 +}
 767 +EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
 768 +
 769 +static void ahci_platform_put_resources(struct device *dev, void *res)
 770 +{
 771 +       struct ahci_host_priv *hpriv = res;
 772 +       int c;
 773 +
 774 +       if (hpriv->got_runtime_pm) {
 775 +               pm_runtime_put_sync(dev);
 776 +               pm_runtime_disable(dev);
 777 +       }
 778 +
 779 +       for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
 780 +               clk_put(hpriv->clks[c]);
 781 +}
 782 +
 783 +/**
 784 + * ahci_platform_get_resources - Get platform resources
 785 + * @pdev: platform device to get resources for
 786 + *
 787 + * This function allocates an ahci_host_priv struct, and gets the following
 788 + * resources, storing a reference to them inside the returned struct:
 789 + *
 790 + * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
 791 + * 2) regulator for controlling the targets power (optional)
 792 + * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
 793 + *    or for non devicetree enabled platforms a single clock
 794 + *     4) phy (optional)
 795 + *
 796 + * RETURNS:
 797 + * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
 798 + */
 799 +struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
 800 +{
 801 +       struct device *dev = &pdev->dev;
 802 +       struct ahci_host_priv *hpriv;
 803 +       struct clk *clk;
 804 +       int i, rc = -ENOMEM;
 805 +
 806 +       if (!devres_open_group(dev, NULL, GFP_KERNEL))
 807 +               return ERR_PTR(-ENOMEM);
 808 +
 809 +       hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
 810 +                            GFP_KERNEL);
 811 +       if (!hpriv)
 812 +               goto err_out;
 813 +
 814 +       devres_add(dev, hpriv);
 815 +
 816 +       hpriv->mmio = devm_ioremap_resource(dev,
 817 +                             platform_get_resource(pdev, IORESOURCE_MEM, 0));
 818 +       if (IS_ERR(hpriv->mmio)) {
 819 +               dev_err(dev, "no mmio space\n");
 820 +               rc = PTR_ERR(hpriv->mmio);
 821 +               goto err_out;
 822 +       }
 823 +
 824 +       hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
 825 +       if (IS_ERR(hpriv->target_pwr)) {
 826 +               rc = PTR_ERR(hpriv->target_pwr);
 827 +               if (rc == -EPROBE_DEFER)
 828 +                       goto err_out;
 829 +               hpriv->target_pwr = NULL;
 830 +       }
 831 +
 832 +       for (i = 0; i < AHCI_MAX_CLKS; i++) {
 833 +               /*
 834 +                * For now we must use clk_get(dev, NULL) for the first clock,
 835 +                * because some platforms (da850, spear13xx) are not yet
 836 +                * converted to use devicetree for clocks.  For new platforms
 837 +                * this is equivalent to of_clk_get(dev->of_node, 0).
 838 +                */
 839 +               if (i == 0)
 840 +                       clk = clk_get(dev, NULL);
 841 +               else
 842 +                       clk = of_clk_get(dev->of_node, i);
 843 +
 844 +               if (IS_ERR(clk)) {
 845 +                       rc = PTR_ERR(clk);
 846 +                       if (rc == -EPROBE_DEFER)
 847 +                               goto err_out;
 848 +                       break;
 849 +               }
 850 +               hpriv->clks[i] = clk;
 851 +       }
 852 +
 853 +       hpriv->phy = devm_phy_get(dev, "sata-phy");
 854 +       if (IS_ERR(hpriv->phy)) {
 855 +               rc = PTR_ERR(hpriv->phy);
 856 +               switch (rc) {
 857 +               case -ENODEV:
 858 +               case -ENOSYS:
 859 +                       /* continue normally */
 860 +                       hpriv->phy = NULL;
 861 +                       break;
 862 +
 863 +               case -EPROBE_DEFER:
 864 +                       goto err_out;
 865 +
 866 +               default:
 867 +                       dev_err(dev, "couldn't get sata-phy\n");
 868 +                       goto err_out;
 869 +               }
 870 +       }
 871 +
 872 +       pm_runtime_enable(dev);
 873 +       pm_runtime_get_sync(dev);
 874 +       hpriv->got_runtime_pm = true;
 875 +
 876 +       devres_remove_group(dev, NULL);
 877 +       return hpriv;
 878 +
 879 +err_out:
 880 +       devres_release_group(dev, NULL);
 881 +       return ERR_PTR(rc);
 882 +}
 883 +EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
 884 +
 885 +/**
 886 + * ahci_platform_init_host - Bring up an ahci-platform host
 887 + * @pdev: platform device pointer for the host
 888 + * @hpriv: ahci-host private data for the host
 889 + * @pi_template: template for the ata_port_info to use
 890 + * @force_port_map: param passed to ahci_save_initial_config
 891 + * @mask_port_map: param passed to ahci_save_initial_config
 892 + *
 893 + * This function does all the usual steps needed to bring up an
 894 + * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
 895 + * must be initialized / enabled before calling this.
 896 + *
 897 + * RETURNS:
 898 + * 0 on success otherwise a negative error code
 899 + */
 900 +int ahci_platform_init_host(struct platform_device *pdev,
 901 +                           struct ahci_host_priv *hpriv,
 902 +                           const struct ata_port_info *pi_template,
 903 +                           unsigned int force_port_map,
 904 +                           unsigned int mask_port_map)
 905 +{
 906 +       struct device *dev = &pdev->dev;
 907 +       struct ata_port_info pi = *pi_template;
 908 +       const struct ata_port_info *ppi[] = { &pi, NULL };
 909 +       struct ata_host *host;
 910 +       int i, irq, n_ports, rc;
 911 +
 912 +       irq = platform_get_irq(pdev, 0);
 913 +       if (irq <= 0) {
 914 +               dev_err(dev, "no irq\n");
 915 +               return -EINVAL;
 916 +       }
 917 +
 918 +       /* prepare host */
 919 +       hpriv->flags |= (unsigned long)pi.private_data;
 920 +
 921 +       ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
 922 +
 923 +       if (hpriv->cap & HOST_CAP_NCQ)
 924 +               pi.flags |= ATA_FLAG_NCQ;
 925 +
 926 +       if (hpriv->cap & HOST_CAP_PMP)
 927 +               pi.flags |= ATA_FLAG_PMP;
 928 +
 929 +       ahci_set_em_messages(hpriv, &pi);
 930 +
 931 +       /* CAP.NP sometimes indicate the index of the last enabled
 932 +        * port, at other times, that of the last possible port, so
 933 +        * determining the maximum port number requires looking at
 934 +        * both CAP.NP and port_map.
 935 +        */
 936 +       n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
 937 +
 938 +       host = ata_host_alloc_pinfo(dev, ppi, n_ports);
 939 +       if (!host)
 940 +               return -ENOMEM;
 941 +
 942 +       host->private_data = hpriv;
 943 +
 944 +       if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
 945 +               host->flags |= ATA_HOST_PARALLEL_SCAN;
 946 +       else
 947 +               dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
 948 +
 949 +       if (pi.flags & ATA_FLAG_EM)
 950 +               ahci_reset_em(host);
 951 +
 952 +       for (i = 0; i < host->n_ports; i++) {
 953 +               struct ata_port *ap = host->ports[i];
 954 +
 955 +               ata_port_desc(ap, "mmio %pR",
 956 +                             platform_get_resource(pdev, IORESOURCE_MEM, 0));
 957 +               ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
 958 +
 959 +               /* set enclosure management message type */
 960 +               if (ap->flags & ATA_FLAG_EM)
 961 +                       ap->em_message_type = hpriv->em_msg_type;
 962 +
 963 +               /* disabled/not-implemented port */
 964 +               if (!(hpriv->port_map & (1 << i)))
 965 +                       ap->ops = &ata_dummy_port_ops;
 966 +       }
 967 +
 968 +       rc = ahci_reset_controller(host);
 969 +       if (rc)
 970 +               return rc;
 971 +
 972 +       ahci_init_controller(host);
 973 +       ahci_print_info(host, "platform");
 974 +
 975 +       return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
 976 +                                &ahci_platform_sht);
 977 +}
 978 +EXPORT_SYMBOL_GPL(ahci_platform_init_host);
 979 +
 980 +static void ahci_host_stop(struct ata_host *host)
 981 +{
 982 +       struct device *dev = host->dev;
 983 +       struct ahci_platform_data *pdata = dev_get_platdata(dev);
 984 +       struct ahci_host_priv *hpriv = host->private_data;
 985 +
 986 +       if (pdata && pdata->exit)
 987 +               pdata->exit(dev);
 988 +
 989 +       ahci_platform_disable_resources(hpriv);
 990 +}
 991 +
 992 +#ifdef CONFIG_PM_SLEEP
 993 +/**
 994 + * ahci_platform_suspend_host - Suspend an ahci-platform host
 995 + * @dev: device pointer for the host
 996 + *
 997 + * This function does all the usual steps needed to suspend an
 998 + * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
 999 + * must be disabled after calling this.
1000 + *
1001 + * RETURNS:
1002 + * 0 on success otherwise a negative error code
1003 + */
1004 +int ahci_platform_suspend_host(struct device *dev)
1005 +{
1006 +       struct ata_host *host = dev_get_drvdata(dev);
1007 +       struct ahci_host_priv *hpriv = host->private_data;
1008 +       void __iomem *mmio = hpriv->mmio;
1009 +       u32 ctl;
1010 +
1011 +       if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
1012 +               dev_err(dev, "firmware update required for suspend/resume\n");
1013 +               return -EIO;
1014 +       }
1015 +
1016 +       /*
1017 +        * AHCI spec rev1.1 section 8.3.3:
1018 +        * Software must disable interrupts prior to requesting a
1019 +        * transition of the HBA to D3 state.
1020 +        */
1021 +       ctl = readl(mmio + HOST_CTL);
1022 +       ctl &= ~HOST_IRQ_EN;
1023 +       writel(ctl, mmio + HOST_CTL);
1024 +       readl(mmio + HOST_CTL); /* flush */
1025 +
1026 +       return ata_host_suspend(host, PMSG_SUSPEND);
1027 +}
1028 +EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
1029 +
1030 +/**
1031 + * ahci_platform_resume_host - Resume an ahci-platform host
1032 + * @dev: device pointer for the host
1033 + *
1034 + * This function does all the usual steps needed to resume an ahci-platform
1035 + * host, note any necessary resources (ie clks, phy, etc.)  must be
1036 + * initialized / enabled before calling this.
1037 + *
1038 + * RETURNS:
1039 + * 0 on success otherwise a negative error code
1040 + */
1041 +int ahci_platform_resume_host(struct device *dev)
1042 +{
1043 +       struct ata_host *host = dev_get_drvdata(dev);
1044 +       int rc;
1045 +
1046 +       if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
1047 +               rc = ahci_reset_controller(host);
1048 +               if (rc)
1049 +                       return rc;
1050 +
1051 +               ahci_init_controller(host);
1052 +       }
1053 +
1054 +       ata_host_resume(host);
1055 +
1056 +       return 0;
1057 +}
1058 +EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
1059 +
1060 +/**
1061 + * ahci_platform_suspend - Suspend an ahci-platform device
1062 + * @dev: the platform device to suspend
1063 + *
1064 + * This function suspends the host associated with the device, followed by
1065 + * disabling all the resources of the device.
1066 + *
1067 + * RETURNS:
1068 + * 0 on success otherwise a negative error code
1069 + */
1070 +int ahci_platform_suspend(struct device *dev)
1071 +{
1072 +       struct ahci_platform_data *pdata = dev_get_platdata(dev);
1073 +       struct ata_host *host = dev_get_drvdata(dev);
1074 +       struct ahci_host_priv *hpriv = host->private_data;
1075 +       int rc;
1076 +
1077 +       rc = ahci_platform_suspend_host(dev);
1078 +       if (rc)
1079 +               return rc;
1080 +
1081 +       if (pdata && pdata->suspend) {
1082 +               rc = pdata->suspend(dev);
1083 +               if (rc)
1084 +                       goto resume_host;
1085 +       }
1086 +
1087 +       ahci_platform_disable_resources(hpriv);
1088 +
1089 +       return 0;
1090 +
1091 +resume_host:
1092 +       ahci_platform_resume_host(dev);
1093 +       return rc;
1094 +}
1095 +EXPORT_SYMBOL_GPL(ahci_platform_suspend);
1096 +
1097 +/**
1098 + * ahci_platform_resume - Resume an ahci-platform device
1099 + * @dev: the platform device to resume
1100 + *
1101 + * This function enables all the resources of the device followed by
1102 + * resuming the host associated with the device.
1103 + *
1104 + * RETURNS:
1105 + * 0 on success otherwise a negative error code
1106 + */
1107 +int ahci_platform_resume(struct device *dev)
1108 +{
1109 +       struct ahci_platform_data *pdata = dev_get_platdata(dev);
1110 +       struct ata_host *host = dev_get_drvdata(dev);
1111 +       struct ahci_host_priv *hpriv = host->private_data;
1112 +       int rc;
1113 +
1114 +       rc = ahci_platform_enable_resources(hpriv);
1115 +       if (rc)
1116 +               return rc;
1117 +
1118 +       if (pdata && pdata->resume) {
1119 +               rc = pdata->resume(dev);
1120 +               if (rc)
1121 +                       goto disable_resources;
1122 +       }
1123 +
1124 +       rc = ahci_platform_resume_host(dev);
1125 +       if (rc)
1126 +               goto disable_resources;
1127 +
1128 +       /* We resumed so update PM runtime state */
1129 +       pm_runtime_disable(dev);
1130 +       pm_runtime_set_active(dev);
1131 +       pm_runtime_enable(dev);
1132 +
1133 +       return 0;
1134 +
1135 +disable_resources:
1136 +       ahci_platform_disable_resources(hpriv);
1137 +
1138 +       return rc;
1139 +}
1140 +EXPORT_SYMBOL_GPL(ahci_platform_resume);
1141 +#endif
1142 +
1143 +MODULE_DESCRIPTION("AHCI SATA platform library");
1144 +MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
1145 +MODULE_LICENSE("GPL");