ExternalVendorCode/openwrt
1
0
Fork 0
mirror of https://github.com/openwrt/openwrt.git synced 2024-12-22 06:57:57 +00:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity
7be0ed78e7
openwrt/target/linux/ipq806x/patches/0124-ata-move-library-code-from-ahci_platform.c-to-libahc.patch
John Crispin 3c1f6e358d ipq806x: Add support for IPQ806x chip family 
Patches are generated using the "format-patch" command from the
following location:
*https://www.codeaurora.org/cgit/quic/kernel/galak-msm/log/?h=apq_ipq_base
*rev=0771849495b4128cac2faf7d49c85c729fc48b20
Patches numbered 76/77/102/103 have already been integrated in 3.14.12,
so they're not in this list.

All these patches are either integrated are pending integration into
kernel.org, therefore these patches should go away once the kernel
gets upgraded to 3.16.

Support is currently limited to AP148 board but can be extended to other
platforms in the future.

These changes do not cover ethernet connectivity.

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 42334
2014-08-30 09:32:58 +00:00

1158 lines
30 KiB
Diff
Raw Blame History

From 04800db1047afbf6701379435bff1a6fa64215f7 Mon Sep 17 00:00:00 2001
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Date: Tue, 25 Mar 2014 19:51:39 +0100
Subject: [PATCH 124/182] ata: move library code from ahci_platform.c to
libahci_platform.c
Move AHCI platform library code from ahci_platform.c to
libahci_platform.c and fix dependencies for ahci_st,
ahci_imx and ahci_sunxi drivers.
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Conflicts:
drivers/ata/Kconfig
drivers/ata/Makefile
---
drivers/ata/Kconfig | 2 +-
drivers/ata/Makefile | 4 +-
drivers/ata/ahci_platform.c | 515 --------------------------------------
drivers/ata/libahci_platform.c | 541 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 544 insertions(+), 518 deletions(-)
create mode 100644 drivers/ata/libahci_platform.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 868429a..dc950f3 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -99,7 +99,7 @@ config SATA_AHCI_PLATFORM
config AHCI_IMX
tristate "Freescale i.MX AHCI SATA support"
- depends on SATA_AHCI_PLATFORM && MFD_SYSCON
+ depends on MFD_SYSCON
help
This option enables support for the Freescale i.MX SoC's
onboard AHCI SATA.
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 46518c6..366b743 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -4,13 +4,13 @@ obj-$(CONFIG_ATA) += libata.o
# non-SFF interface
obj-$(CONFIG_SATA_AHCI) += ahci.o libahci.o
obj-$(CONFIG_SATA_ACARD_AHCI) += acard-ahci.o libahci.o
-obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o
+obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o libahci_platform.o
obj-$(CONFIG_SATA_FSL) += sata_fsl.o
obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
-obj-$(CONFIG_AHCI_IMX) += ahci_imx.o
+obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o
# SFF w/ custom DMA
obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 7bd6adf..ef67e79 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -12,28 +12,15 @@
* any later version.
*/
-#include <linux/clk.h>
#include <linux/kernel.h>
-#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/pm.h>
-#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
-#include <linux/phy/phy.h>
-#include <linux/pm_runtime.h>
#include "ahci.h"
-static void ahci_host_stop(struct ata_host *host);
-
-struct ata_port_operations ahci_platform_ops = {
- .inherits = &ahci_ops,
- .host_stop = ahci_host_stop,
-};
-EXPORT_SYMBOL_GPL(ahci_platform_ops);
-
static const struct ata_port_info ahci_port_info = {
.flags = AHCI_FLAG_COMMON,
.pio_mask = ATA_PIO4,
@@ -41,345 +28,6 @@ static const struct ata_port_info ahci_port_info = {
.port_ops = &ahci_platform_ops,
};
-static struct scsi_host_template ahci_platform_sht = {
- AHCI_SHT("ahci_platform"),
-};
-
-/**
- * ahci_platform_enable_clks - Enable platform clocks
- * @hpriv: host private area to store config values
- *
- * This function enables all the clks found in hpriv->clks, starting at
- * index 0. If any clk fails to enable it disables all the clks already
- * enabled in reverse order, and then returns an error.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
-{
- int c, rc;
-
- for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
- rc = clk_prepare_enable(hpriv->clks[c]);
- if (rc)
- goto disable_unprepare_clk;
- }
- return 0;
-
-disable_unprepare_clk:
- while (--c >= 0)
- clk_disable_unprepare(hpriv->clks[c]);
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
-
-/**
- * ahci_platform_disable_clks - Disable platform clocks
- * @hpriv: host private area to store config values
- *
- * This function disables all the clks found in hpriv->clks, in reverse
- * order of ahci_platform_enable_clks (starting at the end of the array).
- */
-void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
-{
- int c;
-
- for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
- if (hpriv->clks[c])
- clk_disable_unprepare(hpriv->clks[c]);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
-
-/**
- * ahci_platform_enable_resources - Enable platform resources
- * @hpriv: host private area to store config values
- *
- * This function enables all ahci_platform managed resources in the
- * following order:
- * 1) Regulator
- * 2) Clocks (through ahci_platform_enable_clks)
- * 3) Phy
- *
- * If resource enabling fails at any point the previous enabled resources
- * are disabled in reverse order.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
-{
- int rc;
-
- if (hpriv->target_pwr) {
- rc = regulator_enable(hpriv->target_pwr);
- if (rc)
- return rc;
- }
-
- rc = ahci_platform_enable_clks(hpriv);
- if (rc)
- goto disable_regulator;
-
- if (hpriv->phy) {
- rc = phy_init(hpriv->phy);
- if (rc)
- goto disable_clks;
-
- rc = phy_power_on(hpriv->phy);
- if (rc) {
- phy_exit(hpriv->phy);
- goto disable_clks;
- }
- }
-
- return 0;
-
-disable_clks:
- ahci_platform_disable_clks(hpriv);
-
-disable_regulator:
- if (hpriv->target_pwr)
- regulator_disable(hpriv->target_pwr);
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
-
-/**
- * ahci_platform_disable_resources - Disable platform resources
- * @hpriv: host private area to store config values
- *
- * This function disables all ahci_platform managed resources in the
- * following order:
- * 1) Phy
- * 2) Clocks (through ahci_platform_disable_clks)
- * 3) Regulator
- */
-void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
-{
- if (hpriv->phy) {
- phy_power_off(hpriv->phy);
- phy_exit(hpriv->phy);
- }
-
- ahci_platform_disable_clks(hpriv);
-
- if (hpriv->target_pwr)
- regulator_disable(hpriv->target_pwr);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
-
-static void ahci_platform_put_resources(struct device *dev, void *res)
-{
- struct ahci_host_priv *hpriv = res;
- int c;
-
- if (hpriv->got_runtime_pm) {
- pm_runtime_put_sync(dev);
- pm_runtime_disable(dev);
- }
-
- for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
- clk_put(hpriv->clks[c]);
-}
-
-/**
- * ahci_platform_get_resources - Get platform resources
- * @pdev: platform device to get resources for
- *
- * This function allocates an ahci_host_priv struct, and gets the following
- * resources, storing a reference to them inside the returned struct:
- *
- * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
- * 2) regulator for controlling the targets power (optional)
- * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
- * or for non devicetree enabled platforms a single clock
- * 4) phy (optional)
- *
- * RETURNS:
- * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
- */
-struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct ahci_host_priv *hpriv;
- struct clk *clk;
- int i, rc = -ENOMEM;
-
- if (!devres_open_group(dev, NULL, GFP_KERNEL))
- return ERR_PTR(-ENOMEM);
-
- hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
- GFP_KERNEL);
- if (!hpriv)
- goto err_out;
-
- devres_add(dev, hpriv);
-
- hpriv->mmio = devm_ioremap_resource(dev,
- platform_get_resource(pdev, IORESOURCE_MEM, 0));
- if (IS_ERR(hpriv->mmio)) {
- dev_err(dev, "no mmio space\n");
- rc = PTR_ERR(hpriv->mmio);
- goto err_out;
- }
-
- hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
- if (IS_ERR(hpriv->target_pwr)) {
- rc = PTR_ERR(hpriv->target_pwr);
- if (rc == -EPROBE_DEFER)
- goto err_out;
- hpriv->target_pwr = NULL;
- }
-
- for (i = 0; i < AHCI_MAX_CLKS; i++) {
- /*
- * For now we must use clk_get(dev, NULL) for the first clock,
- * because some platforms (da850, spear13xx) are not yet
- * converted to use devicetree for clocks. For new platforms
- * this is equivalent to of_clk_get(dev->of_node, 0).
- */
- if (i == 0)
- clk = clk_get(dev, NULL);
- else
- clk = of_clk_get(dev->of_node, i);
-
- if (IS_ERR(clk)) {
- rc = PTR_ERR(clk);
- if (rc == -EPROBE_DEFER)
- goto err_out;
- break;
- }
- hpriv->clks[i] = clk;
- }
-
- hpriv->phy = devm_phy_get(dev, "sata-phy");
- if (IS_ERR(hpriv->phy)) {
- rc = PTR_ERR(hpriv->phy);
- switch (rc) {
- case -ENODEV:
- case -ENOSYS:
- /* continue normally */
- hpriv->phy = NULL;
- break;
-
- case -EPROBE_DEFER:
- goto err_out;
-
- default:
- dev_err(dev, "couldn't get sata-phy\n");
- goto err_out;
- }
- }
-
- pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
- hpriv->got_runtime_pm = true;
-
- devres_remove_group(dev, NULL);
- return hpriv;
-
-err_out:
- devres_release_group(dev, NULL);
- return ERR_PTR(rc);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
-
-/**
- * ahci_platform_init_host - Bring up an ahci-platform host
- * @pdev: platform device pointer for the host
- * @hpriv: ahci-host private data for the host
- * @pi_template: template for the ata_port_info to use
- * @force_port_map: param passed to ahci_save_initial_config
- * @mask_port_map: param passed to ahci_save_initial_config
- *
- * This function does all the usual steps needed to bring up an
- * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
- * must be initialized / enabled before calling this.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_init_host(struct platform_device *pdev,
- struct ahci_host_priv *hpriv,
- const struct ata_port_info *pi_template,
- unsigned int force_port_map,
- unsigned int mask_port_map)
-{
- struct device *dev = &pdev->dev;
- struct ata_port_info pi = *pi_template;
- const struct ata_port_info *ppi[] = { &pi, NULL };
- struct ata_host *host;
- int i, irq, n_ports, rc;
-
- irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
- dev_err(dev, "no irq\n");
- return -EINVAL;
- }
-
- /* prepare host */
- hpriv->flags |= (unsigned long)pi.private_data;
-
- ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
-
- if (hpriv->cap & HOST_CAP_NCQ)
- pi.flags |= ATA_FLAG_NCQ;
-
- if (hpriv->cap & HOST_CAP_PMP)
- pi.flags |= ATA_FLAG_PMP;
-
- ahci_set_em_messages(hpriv, &pi);
-
- /* CAP.NP sometimes indicate the index of the last enabled
- * port, at other times, that of the last possible port, so
- * determining the maximum port number requires looking at
- * both CAP.NP and port_map.
- */
- n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
-
- host = ata_host_alloc_pinfo(dev, ppi, n_ports);
- if (!host)
- return -ENOMEM;
-
- host->private_data = hpriv;
-
- if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
- host->flags |= ATA_HOST_PARALLEL_SCAN;
- else
- dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
-
- if (pi.flags & ATA_FLAG_EM)
- ahci_reset_em(host);
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
-
- ata_port_desc(ap, "mmio %pR",
- platform_get_resource(pdev, IORESOURCE_MEM, 0));
- ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
-
- /* set enclosure management message type */
- if (ap->flags & ATA_FLAG_EM)
- ap->em_message_type = hpriv->em_msg_type;
-
- /* disabled/not-implemented port */
- if (!(hpriv->port_map & (1 << i)))
- ap->ops = &ata_dummy_port_ops;
- }
-
- rc = ahci_reset_controller(host);
- if (rc)
- return rc;
-
- ahci_init_controller(host);
- ahci_print_info(host, "platform");
-
- return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
- &ahci_platform_sht);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_init_host);
-
static int ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -420,169 +68,6 @@ disable_resources:
return rc;
}
-static void ahci_host_stop(struct ata_host *host)
-{
- struct device *dev = host->dev;
- struct ahci_platform_data *pdata = dev_get_platdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
-
- if (pdata && pdata->exit)
- pdata->exit(dev);
-
- ahci_platform_disable_resources(hpriv);
-}
-
-#ifdef CONFIG_PM_SLEEP
-/**
- * ahci_platform_suspend_host - Suspend an ahci-platform host
- * @dev: device pointer for the host
- *
- * This function does all the usual steps needed to suspend an
- * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
- * must be disabled after calling this.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_suspend_host(struct device *dev)
-{
- struct ata_host *host = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
- void __iomem *mmio = hpriv->mmio;
- u32 ctl;
-
- if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
- dev_err(dev, "firmware update required for suspend/resume\n");
- return -EIO;
- }
-
- /*
- * AHCI spec rev1.1 section 8.3.3:
- * Software must disable interrupts prior to requesting a
- * transition of the HBA to D3 state.
- */
- ctl = readl(mmio + HOST_CTL);
- ctl &= ~HOST_IRQ_EN;
- writel(ctl, mmio + HOST_CTL);
- readl(mmio + HOST_CTL); /* flush */
-
- return ata_host_suspend(host, PMSG_SUSPEND);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
-
-/**
- * ahci_platform_resume_host - Resume an ahci-platform host
- * @dev: device pointer for the host
- *
- * This function does all the usual steps needed to resume an ahci-platform
- * host, note any necessary resources (ie clks, phy, etc.) must be
- * initialized / enabled before calling this.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_resume_host(struct device *dev)
-{
- struct ata_host *host = dev_get_drvdata(dev);
- int rc;
-
- if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
- rc = ahci_reset_controller(host);
- if (rc)
- return rc;
-
- ahci_init_controller(host);
- }
-
- ata_host_resume(host);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
-
-/**
- * ahci_platform_suspend - Suspend an ahci-platform device
- * @dev: the platform device to suspend
- *
- * This function suspends the host associated with the device, followed by
- * disabling all the resources of the device.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_suspend(struct device *dev)
-{
- struct ahci_platform_data *pdata = dev_get_platdata(dev);
- struct ata_host *host = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
- int rc;
-
- rc = ahci_platform_suspend_host(dev);
- if (rc)
- return rc;
-
- if (pdata && pdata->suspend) {
- rc = pdata->suspend(dev);
- if (rc)
- goto resume_host;
- }
-
- ahci_platform_disable_resources(hpriv);
-
- return 0;
-
-resume_host:
- ahci_platform_resume_host(dev);
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_suspend);
-
-/**
- * ahci_platform_resume - Resume an ahci-platform device
- * @dev: the platform device to resume
- *
- * This function enables all the resources of the device followed by
- * resuming the host associated with the device.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_resume(struct device *dev)
-{
- struct ahci_platform_data *pdata = dev_get_platdata(dev);
- struct ata_host *host = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
- int rc;
-
- rc = ahci_platform_enable_resources(hpriv);
- if (rc)
- return rc;
-
- if (pdata && pdata->resume) {
- rc = pdata->resume(dev);
- if (rc)
- goto disable_resources;
- }
-
- rc = ahci_platform_resume_host(dev);
- if (rc)
- goto disable_resources;
-
- /* We resumed so update PM runtime state */
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
-
- return 0;
-
-disable_resources:
- ahci_platform_disable_resources(hpriv);
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_resume);
-#endif
-
static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
ahci_platform_resume);
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
new file mode 100644
index 0000000..7cb3a85
--- /dev/null
+++ b/drivers/ata/libahci_platform.c
@@ -0,0 +1,541 @@
+/*
+ * AHCI SATA platform library
+ *
+ * Copyright 2004-2005 Red Hat, Inc.
+ * Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2010 MontaVista Software, LLC.
+ * Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/gfp.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/libata.h>
+#include <linux/ahci_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/pm_runtime.h>
+#include "ahci.h"
+
+static void ahci_host_stop(struct ata_host *host);
+
+struct ata_port_operations ahci_platform_ops = {
+ .inherits = &ahci_ops,
+ .host_stop = ahci_host_stop,
+};
+EXPORT_SYMBOL_GPL(ahci_platform_ops);
+
+static struct scsi_host_template ahci_platform_sht = {
+ AHCI_SHT("ahci_platform"),
+};
+
+/**
+ * ahci_platform_enable_clks - Enable platform clocks
+ * @hpriv: host private area to store config values
+ *
+ * This function enables all the clks found in hpriv->clks, starting at
+ * index 0. If any clk fails to enable it disables all the clks already
+ * enabled in reverse order, and then returns an error.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
+{
+ int c, rc;
+
+ for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
+ rc = clk_prepare_enable(hpriv->clks[c]);
+ if (rc)
+ goto disable_unprepare_clk;
+ }
+ return 0;
+
+disable_unprepare_clk:
+ while (--c >= 0)
+ clk_disable_unprepare(hpriv->clks[c]);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
+
+/**
+ * ahci_platform_disable_clks - Disable platform clocks
+ * @hpriv: host private area to store config values
+ *
+ * This function disables all the clks found in hpriv->clks, in reverse
+ * order of ahci_platform_enable_clks (starting at the end of the array).
+ */
+void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
+{
+ int c;
+
+ for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
+ if (hpriv->clks[c])
+ clk_disable_unprepare(hpriv->clks[c]);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
+
+/**
+ * ahci_platform_enable_resources - Enable platform resources
+ * @hpriv: host private area to store config values
+ *
+ * This function enables all ahci_platform managed resources in the
+ * following order:
+ * 1) Regulator
+ * 2) Clocks (through ahci_platform_enable_clks)
+ * 3) Phy
+ *
+ * If resource enabling fails at any point the previous enabled resources
+ * are disabled in reverse order.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
+{
+ int rc;
+
+ if (hpriv->target_pwr) {
+ rc = regulator_enable(hpriv->target_pwr);
+ if (rc)
+ return rc;
+ }
+
+ rc = ahci_platform_enable_clks(hpriv);
+ if (rc)
+ goto disable_regulator;
+
+ if (hpriv->phy) {
+ rc = phy_init(hpriv->phy);
+ if (rc)
+ goto disable_clks;
+
+ rc = phy_power_on(hpriv->phy);
+ if (rc) {
+ phy_exit(hpriv->phy);
+ goto disable_clks;
+ }
+ }
+
+ return 0;
+
+disable_clks:
+ ahci_platform_disable_clks(hpriv);
+
+disable_regulator:
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
+
+/**
+ * ahci_platform_disable_resources - Disable platform resources
+ * @hpriv: host private area to store config values
+ *
+ * This function disables all ahci_platform managed resources in the
+ * following order:
+ * 1) Phy
+ * 2) Clocks (through ahci_platform_disable_clks)
+ * 3) Regulator
+ */
+void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
+{
+ if (hpriv->phy) {
+ phy_power_off(hpriv->phy);
+ phy_exit(hpriv->phy);
+ }
+
+ ahci_platform_disable_clks(hpriv);
+
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
+
+static void ahci_platform_put_resources(struct device *dev, void *res)
+{
+ struct ahci_host_priv *hpriv = res;
+ int c;
+
+ if (hpriv->got_runtime_pm) {
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+ }
+
+ for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
+ clk_put(hpriv->clks[c]);
+}
+
+/**
+ * ahci_platform_get_resources - Get platform resources
+ * @pdev: platform device to get resources for
+ *
+ * This function allocates an ahci_host_priv struct, and gets the following
+ * resources, storing a reference to them inside the returned struct:
+ *
+ * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
+ * 2) regulator for controlling the targets power (optional)
+ * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
+ * or for non devicetree enabled platforms a single clock
+ * 4) phy (optional)
+ *
+ * RETURNS:
+ * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
+ */
+struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ahci_host_priv *hpriv;
+ struct clk *clk;
+ int i, rc = -ENOMEM;
+
+ if (!devres_open_group(dev, NULL, GFP_KERNEL))
+ return ERR_PTR(-ENOMEM);
+
+ hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
+ GFP_KERNEL);
+ if (!hpriv)
+ goto err_out;
+
+ devres_add(dev, hpriv);
+
+ hpriv->mmio = devm_ioremap_resource(dev,
+ platform_get_resource(pdev, IORESOURCE_MEM, 0));
+ if (IS_ERR(hpriv->mmio)) {
+ dev_err(dev, "no mmio space\n");
+ rc = PTR_ERR(hpriv->mmio);
+ goto err_out;
+ }
+
+ hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
+ if (IS_ERR(hpriv->target_pwr)) {
+ rc = PTR_ERR(hpriv->target_pwr);
+ if (rc == -EPROBE_DEFER)
+ goto err_out;
+ hpriv->target_pwr = NULL;
+ }
+
+ for (i = 0; i < AHCI_MAX_CLKS; i++) {
+ /*
+ * For now we must use clk_get(dev, NULL) for the first clock,
+ * because some platforms (da850, spear13xx) are not yet
+ * converted to use devicetree for clocks. For new platforms
+ * this is equivalent to of_clk_get(dev->of_node, 0).
+ */
+ if (i == 0)
+ clk = clk_get(dev, NULL);
+ else
+ clk = of_clk_get(dev->of_node, i);
+
+ if (IS_ERR(clk)) {
+ rc = PTR_ERR(clk);
+ if (rc == -EPROBE_DEFER)
+ goto err_out;
+ break;
+ }
+ hpriv->clks[i] = clk;
+ }
+
+ hpriv->phy = devm_phy_get(dev, "sata-phy");
+ if (IS_ERR(hpriv->phy)) {
+ rc = PTR_ERR(hpriv->phy);
+ switch (rc) {
+ case -ENODEV:
+ case -ENOSYS:
+ /* continue normally */
+ hpriv->phy = NULL;
+ break;
+
+ case -EPROBE_DEFER:
+ goto err_out;
+
+ default:
+ dev_err(dev, "couldn't get sata-phy\n");
+ goto err_out;
+ }
+ }
+
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+ hpriv->got_runtime_pm = true;
+
+ devres_remove_group(dev, NULL);
+ return hpriv;
+
+err_out:
+ devres_release_group(dev, NULL);
+ return ERR_PTR(rc);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
+
+/**
+ * ahci_platform_init_host - Bring up an ahci-platform host
+ * @pdev: platform device pointer for the host
+ * @hpriv: ahci-host private data for the host
+ * @pi_template: template for the ata_port_info to use
+ * @force_port_map: param passed to ahci_save_initial_config
+ * @mask_port_map: param passed to ahci_save_initial_config
+ *
+ * This function does all the usual steps needed to bring up an
+ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
+ * must be initialized / enabled before calling this.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_init_host(struct platform_device *pdev,
+ struct ahci_host_priv *hpriv,
+ const struct ata_port_info *pi_template,
+ unsigned int force_port_map,
+ unsigned int mask_port_map)
+{
+ struct device *dev = &pdev->dev;
+ struct ata_port_info pi = *pi_template;
+ const struct ata_port_info *ppi[] = { &pi, NULL };
+ struct ata_host *host;
+ int i, irq, n_ports, rc;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ dev_err(dev, "no irq\n");
+ return -EINVAL;
+ }
+
+ /* prepare host */
+ hpriv->flags |= (unsigned long)pi.private_data;
+
+ ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
+
+ if (hpriv->cap & HOST_CAP_NCQ)
+ pi.flags |= ATA_FLAG_NCQ;
+
+ if (hpriv->cap & HOST_CAP_PMP)
+ pi.flags |= ATA_FLAG_PMP;
+
+ ahci_set_em_messages(hpriv, &pi);
+
+ /* CAP.NP sometimes indicate the index of the last enabled
+ * port, at other times, that of the last possible port, so
+ * determining the maximum port number requires looking at
+ * both CAP.NP and port_map.
+ */
+ n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
+
+ host = ata_host_alloc_pinfo(dev, ppi, n_ports);
+ if (!host)
+ return -ENOMEM;
+
+ host->private_data = hpriv;
+
+ if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
+ host->flags |= ATA_HOST_PARALLEL_SCAN;
+ else
+ dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
+
+ if (pi.flags & ATA_FLAG_EM)
+ ahci_reset_em(host);
+
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+
+ ata_port_desc(ap, "mmio %pR",
+ platform_get_resource(pdev, IORESOURCE_MEM, 0));
+ ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
+
+ /* set enclosure management message type */
+ if (ap->flags & ATA_FLAG_EM)
+ ap->em_message_type = hpriv->em_msg_type;
+
+ /* disabled/not-implemented port */
+ if (!(hpriv->port_map & (1 << i)))
+ ap->ops = &ata_dummy_port_ops;
+ }
+
+ rc = ahci_reset_controller(host);
+ if (rc)
+ return rc;
+
+ ahci_init_controller(host);
+ ahci_print_info(host, "platform");
+
+ return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
+ &ahci_platform_sht);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_init_host);
+
+static void ahci_host_stop(struct ata_host *host)
+{
+ struct device *dev = host->dev;
+ struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+
+ if (pdata && pdata->exit)
+ pdata->exit(dev);
+
+ ahci_platform_disable_resources(hpriv);
+}
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ * ahci_platform_suspend_host - Suspend an ahci-platform host
+ * @dev: device pointer for the host
+ *
+ * This function does all the usual steps needed to suspend an
+ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
+ * must be disabled after calling this.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_suspend_host(struct device *dev)
+{
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ void __iomem *mmio = hpriv->mmio;
+ u32 ctl;
+
+ if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
+ dev_err(dev, "firmware update required for suspend/resume\n");
+ return -EIO;
+ }
+
+ /*
+ * AHCI spec rev1.1 section 8.3.3:
+ * Software must disable interrupts prior to requesting a
+ * transition of the HBA to D3 state.
+ */
+ ctl = readl(mmio + HOST_CTL);
+ ctl &= ~HOST_IRQ_EN;
+ writel(ctl, mmio + HOST_CTL);
+ readl(mmio + HOST_CTL); /* flush */
+
+ return ata_host_suspend(host, PMSG_SUSPEND);
+}
+EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
+
+/**
+ * ahci_platform_resume_host - Resume an ahci-platform host
+ * @dev: device pointer for the host
+ *
+ * This function does all the usual steps needed to resume an ahci-platform
+ * host, note any necessary resources (ie clks, phy, etc.) must be
+ * initialized / enabled before calling this.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_resume_host(struct device *dev)
+{
+ struct ata_host *host = dev_get_drvdata(dev);
+ int rc;
+
+ if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
+ rc = ahci_reset_controller(host);
+ if (rc)
+ return rc;
+
+ ahci_init_controller(host);
+ }
+
+ ata_host_resume(host);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
+
+/**
+ * ahci_platform_suspend - Suspend an ahci-platform device
+ * @dev: the platform device to suspend
+ *
+ * This function suspends the host associated with the device, followed by
+ * disabling all the resources of the device.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_suspend(struct device *dev)
+{
+ struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ int rc;
+
+ rc = ahci_platform_suspend_host(dev);
+ if (rc)
+ return rc;
+
+ if (pdata && pdata->suspend) {
+ rc = pdata->suspend(dev);
+ if (rc)
+ goto resume_host;
+ }
+
+ ahci_platform_disable_resources(hpriv);
+
+ return 0;
+
+resume_host:
+ ahci_platform_resume_host(dev);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_suspend);
+
+/**
+ * ahci_platform_resume - Resume an ahci-platform device
+ * @dev: the platform device to resume
+ *
+ * This function enables all the resources of the device followed by
+ * resuming the host associated with the device.
+ *
+ * RETURNS:
+ * 0 on success otherwise a negative error code
+ */
+int ahci_platform_resume(struct device *dev)
+{
+ struct ahci_platform_data *pdata = dev_get_platdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ int rc;
+
+ rc = ahci_platform_enable_resources(hpriv);
+ if (rc)
+ return rc;
+
+ if (pdata && pdata->resume) {
+ rc = pdata->resume(dev);
+ if (rc)
+ goto disable_resources;
+ }
+
+ rc = ahci_platform_resume_host(dev);
+ if (rc)
+ goto disable_resources;
+
+ /* We resumed so update PM runtime state */
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ return 0;
+
+disable_resources:
+ ahci_platform_disable_resources(hpriv);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(ahci_platform_resume);
+#endif
+
+MODULE_DESCRIPTION("AHCI SATA platform library");
+MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
+MODULE_LICENSE("GPL");
--
1.7.10.4
Reference in New Issue View Git Blame Copy Permalink