1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * AHCI SATA platform library
5 * Copyright 2004-2005 Red Hat, Inc.
6 * Jeff Garzik <jgarzik@pobox.com>
7 * Copyright 2010 MontaVista Software, LLC.
8 * Anton Vorontsov <avorontsov@ru.mvista.com>
11 #include <linux/clk.h>
12 #include <linux/kernel.h>
13 #include <linux/gfp.h>
14 #include <linux/module.h>
16 #include <linux/interrupt.h>
17 #include <linux/device.h>
18 #include <linux/platform_device.h>
19 #include <linux/libata.h>
20 #include <linux/ahci_platform.h>
21 #include <linux/phy/phy.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/of_platform.h>
24 #include <linux/reset.h>
27 static void ahci_host_stop(struct ata_host *host);
29 struct ata_port_operations ahci_platform_ops = {
30 .inherits = &ahci_ops,
31 .host_stop = ahci_host_stop,
33 EXPORT_SYMBOL_GPL(ahci_platform_ops);
36 * ahci_platform_enable_phys - Enable PHYs
37 * @hpriv: host private area to store config values
39 * This function enables all the PHYs found in hpriv->phys, if any.
40 * If a PHY fails to be enabled, it disables all the PHYs already
41 * enabled in reverse order and returns an error.
44 * 0 on success otherwise a negative error code
46 int ahci_platform_enable_phys(struct ahci_host_priv *hpriv)
50 for (i = 0; i < hpriv->nports; i++) {
51 rc = phy_init(hpriv->phys[i]);
55 rc = phy_set_mode(hpriv->phys[i], PHY_MODE_SATA);
57 phy_exit(hpriv->phys[i]);
61 rc = phy_power_on(hpriv->phys[i]);
63 phy_exit(hpriv->phys[i]);
72 phy_power_off(hpriv->phys[i]);
73 phy_exit(hpriv->phys[i]);
77 EXPORT_SYMBOL_GPL(ahci_platform_enable_phys);
80 * ahci_platform_disable_phys - Disable PHYs
81 * @hpriv: host private area to store config values
83 * This function disables all PHYs found in hpriv->phys.
85 void ahci_platform_disable_phys(struct ahci_host_priv *hpriv)
89 for (i = 0; i < hpriv->nports; i++) {
90 phy_power_off(hpriv->phys[i]);
91 phy_exit(hpriv->phys[i]);
94 EXPORT_SYMBOL_GPL(ahci_platform_disable_phys);
97 * ahci_platform_find_clk - Find platform clock
98 * @hpriv: host private area to store config values
99 * @con_id: clock connection ID
101 * This function returns a pointer to the clock descriptor of the clock with
105 * Pointer to the clock descriptor on success otherwise NULL
107 struct clk *ahci_platform_find_clk(struct ahci_host_priv *hpriv, const char *con_id)
111 for (i = 0; i < hpriv->n_clks; i++) {
112 if (!strcmp(hpriv->clks[i].id, con_id))
113 return hpriv->clks[i].clk;
118 EXPORT_SYMBOL_GPL(ahci_platform_find_clk);
121 * ahci_platform_enable_clks - Enable platform clocks
122 * @hpriv: host private area to store config values
124 * This function enables all the clks found for the AHCI device.
127 * 0 on success otherwise a negative error code
129 int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
131 return clk_bulk_prepare_enable(hpriv->n_clks, hpriv->clks);
133 EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
136 * ahci_platform_disable_clks - Disable platform clocks
137 * @hpriv: host private area to store config values
139 * This function disables all the clocks enabled before
140 * (bulk-clocks-disable function is supposed to do that in reverse
141 * from the enabling procedure order).
143 void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
145 clk_bulk_disable_unprepare(hpriv->n_clks, hpriv->clks);
147 EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
150 * ahci_platform_deassert_rsts - Deassert/trigger platform resets
151 * @hpriv: host private area to store config values
153 * This function deasserts or triggers all the reset lines found for
157 * 0 on success otherwise a negative error code
159 int ahci_platform_deassert_rsts(struct ahci_host_priv *hpriv)
161 if (hpriv->f_rsts & AHCI_PLATFORM_RST_TRIGGER)
162 return reset_control_reset(hpriv->rsts);
164 return reset_control_deassert(hpriv->rsts);
166 EXPORT_SYMBOL_GPL(ahci_platform_deassert_rsts);
169 * ahci_platform_assert_rsts - Assert/rearm platform resets
170 * @hpriv: host private area to store config values
172 * This function asserts or rearms (for self-deasserting resets) all
173 * the reset controls found for the AHCI device.
176 * 0 on success otherwise a negative error code
178 int ahci_platform_assert_rsts(struct ahci_host_priv *hpriv)
180 if (hpriv->f_rsts & AHCI_PLATFORM_RST_TRIGGER)
181 return reset_control_rearm(hpriv->rsts);
183 return reset_control_assert(hpriv->rsts);
185 EXPORT_SYMBOL_GPL(ahci_platform_assert_rsts);
188 * ahci_platform_enable_regulators - Enable regulators
189 * @hpriv: host private area to store config values
191 * This function enables all the regulators found in controller and
192 * hpriv->target_pwrs, if any. If a regulator fails to be enabled, it
193 * disables all the regulators already enabled in reverse order and
197 * 0 on success otherwise a negative error code
199 int ahci_platform_enable_regulators(struct ahci_host_priv *hpriv)
203 rc = regulator_enable(hpriv->ahci_regulator);
207 rc = regulator_enable(hpriv->phy_regulator);
209 goto disable_ahci_pwrs;
211 for (i = 0; i < hpriv->nports; i++) {
212 if (!hpriv->target_pwrs[i])
215 rc = regulator_enable(hpriv->target_pwrs[i]);
217 goto disable_target_pwrs;
224 if (hpriv->target_pwrs[i])
225 regulator_disable(hpriv->target_pwrs[i]);
227 regulator_disable(hpriv->phy_regulator);
229 regulator_disable(hpriv->ahci_regulator);
232 EXPORT_SYMBOL_GPL(ahci_platform_enable_regulators);
235 * ahci_platform_disable_regulators - Disable regulators
236 * @hpriv: host private area to store config values
238 * This function disables all regulators found in hpriv->target_pwrs and
241 void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv)
245 for (i = 0; i < hpriv->nports; i++) {
246 if (!hpriv->target_pwrs[i])
248 regulator_disable(hpriv->target_pwrs[i]);
251 regulator_disable(hpriv->ahci_regulator);
252 regulator_disable(hpriv->phy_regulator);
254 EXPORT_SYMBOL_GPL(ahci_platform_disable_regulators);
256 * ahci_platform_enable_resources - Enable platform resources
257 * @hpriv: host private area to store config values
259 * This function enables all ahci_platform managed resources in the
262 * 2) Clocks (through ahci_platform_enable_clks)
266 * If resource enabling fails at any point the previous enabled resources
267 * are disabled in reverse order.
270 * 0 on success otherwise a negative error code
272 int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
276 rc = ahci_platform_enable_regulators(hpriv);
280 rc = ahci_platform_enable_clks(hpriv);
282 goto disable_regulator;
284 rc = ahci_platform_deassert_rsts(hpriv);
288 rc = ahci_platform_enable_phys(hpriv);
295 ahci_platform_assert_rsts(hpriv);
298 ahci_platform_disable_clks(hpriv);
301 ahci_platform_disable_regulators(hpriv);
305 EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
308 * ahci_platform_disable_resources - Disable platform resources
309 * @hpriv: host private area to store config values
311 * This function disables all ahci_platform managed resources in the
315 * 3) Clocks (through ahci_platform_disable_clks)
318 void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
320 ahci_platform_disable_phys(hpriv);
322 ahci_platform_assert_rsts(hpriv);
324 ahci_platform_disable_clks(hpriv);
326 ahci_platform_disable_regulators(hpriv);
328 EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
330 static void ahci_platform_put_resources(struct device *dev, void *res)
332 struct ahci_host_priv *hpriv = res;
335 if (hpriv->got_runtime_pm) {
336 pm_runtime_put_sync(dev);
337 pm_runtime_disable(dev);
341 * The regulators are tied to child node device and not to the
342 * SATA device itself. So we can't use devm for automatically
343 * releasing them. We have to do it manually here.
345 for (c = 0; c < hpriv->nports; c++)
346 if (hpriv->target_pwrs && hpriv->target_pwrs[c])
347 regulator_put(hpriv->target_pwrs[c]);
349 kfree(hpriv->target_pwrs);
352 static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port,
353 struct device *dev, struct device_node *node)
357 hpriv->phys[port] = devm_of_phy_get(dev, node, NULL);
359 if (!IS_ERR(hpriv->phys[port]))
362 rc = PTR_ERR(hpriv->phys[port]);
365 /* No PHY support. Check if PHY is required. */
366 if (of_find_property(node, "phys", NULL)) {
368 "couldn't get PHY in node %pOFn: ENOSYS\n",
374 /* continue normally */
375 hpriv->phys[port] = NULL;
379 /* Do not complain yet */
384 "couldn't get PHY in node %pOFn: %d\n",
393 static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
396 struct regulator *target_pwr;
399 target_pwr = regulator_get(dev, "target");
401 if (!IS_ERR(target_pwr))
402 hpriv->target_pwrs[port] = target_pwr;
404 rc = PTR_ERR(target_pwr);
409 static int ahci_platform_get_firmware(struct ahci_host_priv *hpriv,
412 struct device_node *child;
415 if (!of_property_read_u32(dev->of_node, "hba-cap", &hpriv->saved_cap))
416 hpriv->saved_cap &= (HOST_CAP_SSS | HOST_CAP_MPS);
418 of_property_read_u32(dev->of_node,
419 "ports-implemented", &hpriv->saved_port_map);
421 for_each_child_of_node(dev->of_node, child) {
422 if (!of_device_is_available(child))
425 if (of_property_read_u32(child, "reg", &port)) {
430 if (!of_property_read_u32(child, "hba-port-cap", &hpriv->saved_port_cap[port]))
431 hpriv->saved_port_cap[port] &= PORT_CMD_CAP;
438 * ahci_platform_get_resources - Get platform resources
439 * @pdev: platform device to get resources for
440 * @flags: bitmap representing the resource to get
442 * This function allocates an ahci_host_priv struct, and gets the following
443 * resources, storing a reference to them inside the returned struct:
445 * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
446 * 2) regulator for controlling the targets power (optional)
447 * regulator for controlling the AHCI controller (optional)
448 * 3) all clocks specified in the devicetree node, or a single
449 * clock for non-OF platforms (optional)
450 * 4) resets, if flags has AHCI_PLATFORM_GET_RESETS (optional)
454 * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
456 struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
459 int child_nodes, rc = -ENOMEM, enabled_ports = 0;
460 struct device *dev = &pdev->dev;
461 struct ahci_host_priv *hpriv;
462 struct device_node *child;
463 u32 mask_port_map = 0;
465 if (!devres_open_group(dev, NULL, GFP_KERNEL))
466 return ERR_PTR(-ENOMEM);
468 hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
473 devres_add(dev, hpriv);
476 * If the DT provided an "ahci" named resource, use it. Otherwise,
477 * fallback to using the default first resource for the device node.
479 if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "ahci"))
480 hpriv->mmio = devm_platform_ioremap_resource_byname(pdev, "ahci");
482 hpriv->mmio = devm_platform_ioremap_resource(pdev, 0);
483 if (IS_ERR(hpriv->mmio)) {
484 rc = PTR_ERR(hpriv->mmio);
489 * Bulk clocks getting procedure can fail to find any clock due to
490 * running on a non-OF platform or due to the clocks being defined in
491 * bypass of the DT firmware (like da850, spear13xx). In that case we
492 * fallback to getting a single clock source right from the dev clocks
495 rc = devm_clk_bulk_get_all(dev, &hpriv->clks);
500 /* Got clocks in bulk */
504 * No clock bulk found: fallback to manually getting
505 * the optional clock.
507 hpriv->clks = devm_kzalloc(dev, sizeof(*hpriv->clks), GFP_KERNEL);
512 hpriv->clks->clk = devm_clk_get_optional(dev, NULL);
513 if (IS_ERR(hpriv->clks->clk)) {
514 rc = PTR_ERR(hpriv->clks->clk);
516 } else if (hpriv->clks->clk) {
517 hpriv->clks->id = "ahci";
522 hpriv->ahci_regulator = devm_regulator_get(dev, "ahci");
523 if (IS_ERR(hpriv->ahci_regulator)) {
524 rc = PTR_ERR(hpriv->ahci_regulator);
529 hpriv->phy_regulator = devm_regulator_get(dev, "phy");
530 if (IS_ERR(hpriv->phy_regulator)) {
531 rc = PTR_ERR(hpriv->phy_regulator);
535 if (flags & AHCI_PLATFORM_GET_RESETS) {
536 hpriv->rsts = devm_reset_control_array_get_optional_shared(dev);
537 if (IS_ERR(hpriv->rsts)) {
538 rc = PTR_ERR(hpriv->rsts);
542 hpriv->f_rsts = flags & AHCI_PLATFORM_RST_TRIGGER;
546 * Too many sub-nodes most likely means having something wrong with
549 child_nodes = of_get_child_count(dev->of_node);
550 if (child_nodes > AHCI_MAX_PORTS) {
556 * If no sub-node was found, we still need to set nports to
557 * one in order to be able to use the
558 * ahci_platform_[en|dis]able_[phys|regulators] functions.
561 hpriv->nports = child_nodes;
565 hpriv->phys = devm_kcalloc(dev, hpriv->nports, sizeof(*hpriv->phys), GFP_KERNEL);
571 * We cannot use devm_ here, since ahci_platform_put_resources() uses
572 * target_pwrs after devm_ have freed memory
574 hpriv->target_pwrs = kcalloc(hpriv->nports, sizeof(*hpriv->target_pwrs), GFP_KERNEL);
575 if (!hpriv->target_pwrs) {
581 for_each_child_of_node(dev->of_node, child) {
583 struct platform_device *port_dev __maybe_unused;
585 if (!of_device_is_available(child))
588 if (of_property_read_u32(child, "reg", &port)) {
594 if (port >= hpriv->nports) {
595 dev_warn(dev, "invalid port number %d\n", port);
598 mask_port_map |= BIT(port);
600 #ifdef CONFIG_OF_ADDRESS
601 of_platform_device_create(child, NULL, NULL);
603 port_dev = of_find_device_by_node(child);
606 rc = ahci_platform_get_regulator(hpriv, port,
608 if (rc == -EPROBE_DEFER) {
615 rc = ahci_platform_get_phy(hpriv, port, dev, child);
623 if (!enabled_ports) {
624 dev_warn(dev, "No port enabled\n");
629 if (!hpriv->mask_port_map)
630 hpriv->mask_port_map = mask_port_map;
633 * If no sub-node was found, keep this for device tree
636 rc = ahci_platform_get_phy(hpriv, 0, dev, dev->of_node);
640 rc = ahci_platform_get_regulator(hpriv, 0, dev);
641 if (rc == -EPROBE_DEFER)
646 * Retrieve firmware-specific flags which then will be used to set
647 * the HW-init fields of HBA and its ports
649 rc = ahci_platform_get_firmware(hpriv, dev);
653 pm_runtime_enable(dev);
654 pm_runtime_get_sync(dev);
655 hpriv->got_runtime_pm = true;
657 devres_remove_group(dev, NULL);
661 devres_release_group(dev, NULL);
664 EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
667 * ahci_platform_init_host - Bring up an ahci-platform host
668 * @pdev: platform device pointer for the host
669 * @hpriv: ahci-host private data for the host
670 * @pi_template: template for the ata_port_info to use
671 * @sht: scsi_host_template to use when registering
673 * This function does all the usual steps needed to bring up an
674 * ahci-platform host, note any necessary resources (ie clks, phys, etc.)
675 * must be initialized / enabled before calling this.
678 * 0 on success otherwise a negative error code
680 int ahci_platform_init_host(struct platform_device *pdev,
681 struct ahci_host_priv *hpriv,
682 const struct ata_port_info *pi_template,
683 struct scsi_host_template *sht)
685 struct device *dev = &pdev->dev;
686 struct ata_port_info pi = *pi_template;
687 const struct ata_port_info *ppi[] = { &pi, NULL };
688 struct ata_host *host;
689 int i, irq, n_ports, rc;
691 irq = platform_get_irq(pdev, 0);
700 pi.private_data = (void *)(unsigned long)hpriv->flags;
702 ahci_save_initial_config(dev, hpriv);
704 if (hpriv->cap & HOST_CAP_NCQ)
705 pi.flags |= ATA_FLAG_NCQ;
707 if (hpriv->cap & HOST_CAP_PMP)
708 pi.flags |= ATA_FLAG_PMP;
710 ahci_set_em_messages(hpriv, &pi);
712 /* CAP.NP sometimes indicate the index of the last enabled
713 * port, at other times, that of the last possible port, so
714 * determining the maximum port number requires looking at
715 * both CAP.NP and port_map.
717 n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
719 host = ata_host_alloc_pinfo(dev, ppi, n_ports);
723 host->private_data = hpriv;
725 if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
726 host->flags |= ATA_HOST_PARALLEL_SCAN;
728 dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
730 if (pi.flags & ATA_FLAG_EM)
733 for (i = 0; i < host->n_ports; i++) {
734 struct ata_port *ap = host->ports[i];
736 ata_port_desc(ap, "mmio %pR",
737 platform_get_resource(pdev, IORESOURCE_MEM, 0));
738 ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
740 /* set enclosure management message type */
741 if (ap->flags & ATA_FLAG_EM)
742 ap->em_message_type = hpriv->em_msg_type;
744 /* disabled/not-implemented port */
745 if (!(hpriv->port_map & (1 << i)))
746 ap->ops = &ata_dummy_port_ops;
749 if (hpriv->cap & HOST_CAP_64) {
750 rc = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
752 dev_err(dev, "Failed to enable 64-bit DMA.\n");
757 rc = ahci_reset_controller(host);
761 ahci_init_controller(host);
762 ahci_print_info(host, "platform");
764 return ahci_host_activate(host, sht);
766 EXPORT_SYMBOL_GPL(ahci_platform_init_host);
768 static void ahci_host_stop(struct ata_host *host)
770 struct ahci_host_priv *hpriv = host->private_data;
772 ahci_platform_disable_resources(hpriv);
776 * ahci_platform_shutdown - Disable interrupts and stop DMA for host ports
777 * @pdev: platform device pointer for the host
779 * This function is called during system shutdown and performs the minimal
780 * deconfiguration required to ensure that an ahci_platform host cannot
781 * corrupt or otherwise interfere with a new kernel being started with kexec.
783 void ahci_platform_shutdown(struct platform_device *pdev)
785 struct ata_host *host = platform_get_drvdata(pdev);
786 struct ahci_host_priv *hpriv = host->private_data;
787 void __iomem *mmio = hpriv->mmio;
790 for (i = 0; i < host->n_ports; i++) {
791 struct ata_port *ap = host->ports[i];
793 /* Disable port interrupts */
797 /* Stop the port DMA engines */
798 if (ap->ops->port_stop)
799 ap->ops->port_stop(ap);
802 /* Disable and clear host interrupts */
803 writel(readl(mmio + HOST_CTL) & ~HOST_IRQ_EN, mmio + HOST_CTL);
804 readl(mmio + HOST_CTL); /* flush */
805 writel(GENMASK(host->n_ports, 0), mmio + HOST_IRQ_STAT);
807 EXPORT_SYMBOL_GPL(ahci_platform_shutdown);
809 #ifdef CONFIG_PM_SLEEP
811 * ahci_platform_suspend_host - Suspend an ahci-platform host
812 * @dev: device pointer for the host
814 * This function does all the usual steps needed to suspend an
815 * ahci-platform host, note any necessary resources (ie clks, phys, etc.)
816 * must be disabled after calling this.
819 * 0 on success otherwise a negative error code
821 int ahci_platform_suspend_host(struct device *dev)
823 struct ata_host *host = dev_get_drvdata(dev);
824 struct ahci_host_priv *hpriv = host->private_data;
825 void __iomem *mmio = hpriv->mmio;
828 if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
829 dev_err(dev, "firmware update required for suspend/resume\n");
834 * AHCI spec rev1.1 section 8.3.3:
835 * Software must disable interrupts prior to requesting a
836 * transition of the HBA to D3 state.
838 ctl = readl(mmio + HOST_CTL);
840 writel(ctl, mmio + HOST_CTL);
841 readl(mmio + HOST_CTL); /* flush */
843 if (hpriv->flags & AHCI_HFLAG_SUSPEND_PHYS)
844 ahci_platform_disable_phys(hpriv);
846 ata_host_suspend(host, PMSG_SUSPEND);
849 EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
852 * ahci_platform_resume_host - Resume an ahci-platform host
853 * @dev: device pointer for the host
855 * This function does all the usual steps needed to resume an ahci-platform
856 * host, note any necessary resources (ie clks, phys, etc.) must be
857 * initialized / enabled before calling this.
860 * 0 on success otherwise a negative error code
862 int ahci_platform_resume_host(struct device *dev)
864 struct ata_host *host = dev_get_drvdata(dev);
865 struct ahci_host_priv *hpriv = host->private_data;
868 if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
869 rc = ahci_reset_controller(host);
873 ahci_init_controller(host);
876 if (hpriv->flags & AHCI_HFLAG_SUSPEND_PHYS)
877 ahci_platform_enable_phys(hpriv);
879 ata_host_resume(host);
883 EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
886 * ahci_platform_suspend - Suspend an ahci-platform device
887 * @dev: the platform device to suspend
889 * This function suspends the host associated with the device, followed by
890 * disabling all the resources of the device.
893 * 0 on success otherwise a negative error code
895 int ahci_platform_suspend(struct device *dev)
897 struct ata_host *host = dev_get_drvdata(dev);
898 struct ahci_host_priv *hpriv = host->private_data;
901 rc = ahci_platform_suspend_host(dev);
905 ahci_platform_disable_resources(hpriv);
909 EXPORT_SYMBOL_GPL(ahci_platform_suspend);
912 * ahci_platform_resume - Resume an ahci-platform device
913 * @dev: the platform device to resume
915 * This function enables all the resources of the device followed by
916 * resuming the host associated with the device.
919 * 0 on success otherwise a negative error code
921 int ahci_platform_resume(struct device *dev)
923 struct ata_host *host = dev_get_drvdata(dev);
924 struct ahci_host_priv *hpriv = host->private_data;
927 rc = ahci_platform_enable_resources(hpriv);
931 rc = ahci_platform_resume_host(dev);
933 goto disable_resources;
935 /* We resumed so update PM runtime state */
936 pm_runtime_disable(dev);
937 pm_runtime_set_active(dev);
938 pm_runtime_enable(dev);
943 ahci_platform_disable_resources(hpriv);
947 EXPORT_SYMBOL_GPL(ahci_platform_resume);
950 MODULE_DESCRIPTION("AHCI SATA platform library");
951 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
952 MODULE_LICENSE("GPL");