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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>
This commit is contained in:
Bartlomiej Zolnierkiewicz
Tejun Heo
parent
83b03fd67b
commit
fd990556f0
@ -99,7 +99,6 @@ config SATA_AHCI_PLATFORM
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config AHCI_ST
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tristate "ST AHCI SATA support"
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depends on SATA_AHCI_PLATFORM
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depends on ARCH_STI
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help
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This option enables support for ST AHCI SATA controller.
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@ -108,7 +107,7 @@ config AHCI_ST
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config AHCI_IMX
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tristate "Freescale i.MX AHCI SATA support"
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depends on SATA_AHCI_PLATFORM && MFD_SYSCON
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depends on MFD_SYSCON
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help
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This option enables support for the Freescale i.MX SoC's
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onboard AHCI SATA.
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@ -117,7 +116,7 @@ config AHCI_IMX
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config AHCI_SUNXI
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tristate "Allwinner sunxi AHCI SATA support"
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depends on ARCH_SUNXI && SATA_AHCI_PLATFORM
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depends on ARCH_SUNXI
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help
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This option enables support for the Allwinner sunxi SoC's
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onboard AHCI SATA.
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@ -126,7 +125,7 @@ config AHCI_SUNXI
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config AHCI_XGENE
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tristate "APM X-Gene 6.0Gbps AHCI SATA host controller support"
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depends on SATA_AHCI_PLATFORM && (ARM64 || COMPILE_TEST)
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depends on ARM64 || COMPILE_TEST
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select PHY_XGENE
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help
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This option enables support for APM X-Gene SoC SATA host controller.
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@ -4,16 +4,16 @@ obj-$(CONFIG_ATA) += libata.o
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# non-SFF interface
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obj-$(CONFIG_SATA_AHCI) += ahci.o libahci.o
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obj-$(CONFIG_SATA_ACARD_AHCI) += acard-ahci.o libahci.o
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obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o
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obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o libahci_platform.o
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obj-$(CONFIG_SATA_FSL) += sata_fsl.o
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obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
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obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
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obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
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obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
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obj-$(CONFIG_AHCI_IMX) += ahci_imx.o
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obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o
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obj-$(CONFIG_AHCI_ST) += ahci_st.o
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obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o
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obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o
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obj-$(CONFIG_AHCI_SUNXI) += ahci_sunxi.o libahci.o libahci_platform.o
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obj-$(CONFIG_AHCI_ST) += ahci_st.o libahci.o libahci_platform.o
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obj-$(CONFIG_AHCI_XGENE) += ahci_xgene.o libahci.o libahci_platform.o
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# SFF w/ custom DMA
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obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
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@ -12,28 +12,15 @@
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* any later version.
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*/
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#include <linux/clk.h>
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#include <linux/kernel.h>
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#include <linux/gfp.h>
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#include <linux/module.h>
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#include <linux/pm.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/libata.h>
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#include <linux/ahci_platform.h>
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#include <linux/phy/phy.h>
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#include <linux/pm_runtime.h>
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#include "ahci.h"
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static void ahci_host_stop(struct ata_host *host);
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struct ata_port_operations ahci_platform_ops = {
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.inherits = &ahci_ops,
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.host_stop = ahci_host_stop,
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};
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EXPORT_SYMBOL_GPL(ahci_platform_ops);
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static const struct ata_port_info ahci_port_info = {
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.flags = AHCI_FLAG_COMMON,
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.pio_mask = ATA_PIO4,
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@ -41,345 +28,6 @@ static const struct ata_port_info ahci_port_info = {
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.port_ops = &ahci_platform_ops,
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};
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static struct scsi_host_template ahci_platform_sht = {
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AHCI_SHT("ahci_platform"),
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};
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/**
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* ahci_platform_enable_clks - Enable platform clocks
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* @hpriv: host private area to store config values
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*
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* This function enables all the clks found in hpriv->clks, starting at
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* index 0. If any clk fails to enable it disables all the clks already
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* enabled in reverse order, and then returns an error.
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*
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* RETURNS:
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* 0 on success otherwise a negative error code
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*/
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int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
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{
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int c, rc;
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for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
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rc = clk_prepare_enable(hpriv->clks[c]);
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if (rc)
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goto disable_unprepare_clk;
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}
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return 0;
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disable_unprepare_clk:
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while (--c >= 0)
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clk_disable_unprepare(hpriv->clks[c]);
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return rc;
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}
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EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
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/**
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* ahci_platform_disable_clks - Disable platform clocks
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* @hpriv: host private area to store config values
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*
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* This function disables all the clks found in hpriv->clks, in reverse
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* order of ahci_platform_enable_clks (starting at the end of the array).
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*/
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void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
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{
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int c;
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for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
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if (hpriv->clks[c])
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clk_disable_unprepare(hpriv->clks[c]);
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}
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EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
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/**
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* ahci_platform_enable_resources - Enable platform resources
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* @hpriv: host private area to store config values
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*
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* This function enables all ahci_platform managed resources in the
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* following order:
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* 1) Regulator
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* 2) Clocks (through ahci_platform_enable_clks)
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* 3) Phy
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*
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* If resource enabling fails at any point the previous enabled resources
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* are disabled in reverse order.
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*
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* RETURNS:
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* 0 on success otherwise a negative error code
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*/
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int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
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{
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int rc;
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if (hpriv->target_pwr) {
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rc = regulator_enable(hpriv->target_pwr);
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if (rc)
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return rc;
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}
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rc = ahci_platform_enable_clks(hpriv);
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if (rc)
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goto disable_regulator;
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if (hpriv->phy) {
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rc = phy_init(hpriv->phy);
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if (rc)
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goto disable_clks;
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rc = phy_power_on(hpriv->phy);
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if (rc) {
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phy_exit(hpriv->phy);
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goto disable_clks;
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}
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}
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return 0;
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disable_clks:
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ahci_platform_disable_clks(hpriv);
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disable_regulator:
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if (hpriv->target_pwr)
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regulator_disable(hpriv->target_pwr);
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return rc;
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}
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EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
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/**
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* ahci_platform_disable_resources - Disable platform resources
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* @hpriv: host private area to store config values
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*
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* This function disables all ahci_platform managed resources in the
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* following order:
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* 1) Phy
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* 2) Clocks (through ahci_platform_disable_clks)
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* 3) Regulator
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*/
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void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
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{
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if (hpriv->phy) {
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phy_power_off(hpriv->phy);
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phy_exit(hpriv->phy);
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}
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ahci_platform_disable_clks(hpriv);
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if (hpriv->target_pwr)
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regulator_disable(hpriv->target_pwr);
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}
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EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
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static void ahci_platform_put_resources(struct device *dev, void *res)
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{
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struct ahci_host_priv *hpriv = res;
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int c;
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if (hpriv->got_runtime_pm) {
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pm_runtime_put_sync(dev);
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pm_runtime_disable(dev);
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}
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for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
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clk_put(hpriv->clks[c]);
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}
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/**
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* ahci_platform_get_resources - Get platform resources
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* @pdev: platform device to get resources for
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*
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* This function allocates an ahci_host_priv struct, and gets the following
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* resources, storing a reference to them inside the returned struct:
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*
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* 1) mmio registers (IORESOURCE_MEM 0, mandatory)
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* 2) regulator for controlling the targets power (optional)
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* 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
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* or for non devicetree enabled platforms a single clock
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* 4) phy (optional)
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*
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* RETURNS:
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* The allocated ahci_host_priv on success, otherwise an ERR_PTR value
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*/
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struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ahci_host_priv *hpriv;
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struct clk *clk;
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int i, rc = -ENOMEM;
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if (!devres_open_group(dev, NULL, GFP_KERNEL))
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return ERR_PTR(-ENOMEM);
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hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
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GFP_KERNEL);
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if (!hpriv)
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goto err_out;
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devres_add(dev, hpriv);
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hpriv->mmio = devm_ioremap_resource(dev,
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platform_get_resource(pdev, IORESOURCE_MEM, 0));
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if (IS_ERR(hpriv->mmio)) {
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dev_err(dev, "no mmio space\n");
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rc = PTR_ERR(hpriv->mmio);
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goto err_out;
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}
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hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
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if (IS_ERR(hpriv->target_pwr)) {
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rc = PTR_ERR(hpriv->target_pwr);
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if (rc == -EPROBE_DEFER)
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goto err_out;
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hpriv->target_pwr = NULL;
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}
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for (i = 0; i < AHCI_MAX_CLKS; i++) {
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/*
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* For now we must use clk_get(dev, NULL) for the first clock,
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* because some platforms (da850, spear13xx) are not yet
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* converted to use devicetree for clocks. For new platforms
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* this is equivalent to of_clk_get(dev->of_node, 0).
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*/
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if (i == 0)
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clk = clk_get(dev, NULL);
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else
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clk = of_clk_get(dev->of_node, i);
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if (IS_ERR(clk)) {
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rc = PTR_ERR(clk);
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if (rc == -EPROBE_DEFER)
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goto err_out;
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break;
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}
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hpriv->clks[i] = clk;
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}
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hpriv->phy = devm_phy_get(dev, "sata-phy");
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if (IS_ERR(hpriv->phy)) {
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rc = PTR_ERR(hpriv->phy);
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switch (rc) {
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case -ENODEV:
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case -ENOSYS:
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/* continue normally */
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hpriv->phy = NULL;
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break;
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case -EPROBE_DEFER:
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goto err_out;
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default:
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dev_err(dev, "couldn't get sata-phy\n");
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goto err_out;
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}
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}
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pm_runtime_enable(dev);
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pm_runtime_get_sync(dev);
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hpriv->got_runtime_pm = true;
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devres_remove_group(dev, NULL);
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return hpriv;
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err_out:
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devres_release_group(dev, NULL);
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return ERR_PTR(rc);
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}
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EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
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/**
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* ahci_platform_init_host - Bring up an ahci-platform host
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* @pdev: platform device pointer for the host
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* @hpriv: ahci-host private data for the host
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* @pi_template: template for the ata_port_info to use
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* @force_port_map: param passed to ahci_save_initial_config
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* @mask_port_map: param passed to ahci_save_initial_config
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*
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* This function does all the usual steps needed to bring up an
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* ahci-platform host, note any necessary resources (ie clks, phy, etc.)
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* must be initialized / enabled before calling this.
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*
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* RETURNS:
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* 0 on success otherwise a negative error code
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*/
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int ahci_platform_init_host(struct platform_device *pdev,
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struct ahci_host_priv *hpriv,
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const struct ata_port_info *pi_template,
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unsigned int force_port_map,
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unsigned int mask_port_map)
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{
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struct device *dev = &pdev->dev;
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struct ata_port_info pi = *pi_template;
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const struct ata_port_info *ppi[] = { &pi, NULL };
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struct ata_host *host;
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int i, irq, n_ports, rc;
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irq = platform_get_irq(pdev, 0);
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if (irq <= 0) {
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dev_err(dev, "no irq\n");
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return -EINVAL;
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}
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/* prepare host */
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hpriv->flags |= (unsigned long)pi.private_data;
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ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
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if (hpriv->cap & HOST_CAP_NCQ)
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pi.flags |= ATA_FLAG_NCQ;
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if (hpriv->cap & HOST_CAP_PMP)
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pi.flags |= ATA_FLAG_PMP;
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ahci_set_em_messages(hpriv, &pi);
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/* CAP.NP sometimes indicate the index of the last enabled
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* port, at other times, that of the last possible port, so
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* determining the maximum port number requires looking at
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* both CAP.NP and port_map.
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*/
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n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
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host = ata_host_alloc_pinfo(dev, ppi, n_ports);
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if (!host)
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return -ENOMEM;
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host->private_data = hpriv;
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if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
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host->flags |= ATA_HOST_PARALLEL_SCAN;
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else
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dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
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if (pi.flags & ATA_FLAG_EM)
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ahci_reset_em(host);
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for (i = 0; i < host->n_ports; i++) {
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struct ata_port *ap = host->ports[i];
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ata_port_desc(ap, "mmio %pR",
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platform_get_resource(pdev, IORESOURCE_MEM, 0));
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ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
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/* set enclosure management message type */
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if (ap->flags & ATA_FLAG_EM)
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ap->em_message_type = hpriv->em_msg_type;
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/* disabled/not-implemented port */
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if (!(hpriv->port_map & (1 << i)))
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ap->ops = &ata_dummy_port_ops;
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}
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rc = ahci_reset_controller(host);
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if (rc)
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return rc;
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ahci_init_controller(host);
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ahci_print_info(host, "platform");
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return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
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&ahci_platform_sht);
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}
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EXPORT_SYMBOL_GPL(ahci_platform_init_host);
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static int ahci_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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@ -420,169 +68,6 @@ disable_resources:
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return rc;
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}
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static void ahci_host_stop(struct ata_host *host)
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{
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struct device *dev = host->dev;
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struct ahci_platform_data *pdata = dev_get_platdata(dev);
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struct ahci_host_priv *hpriv = host->private_data;
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if (pdata && pdata->exit)
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pdata->exit(dev);
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ahci_platform_disable_resources(hpriv);
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}
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#ifdef CONFIG_PM_SLEEP
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/**
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* ahci_platform_suspend_host - Suspend an ahci-platform host
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* @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);
|
||||
|
||||
|
||||
541
drivers/ata/libahci_platform.c
Normal file
541
drivers/ata/libahci_platform.c
Normal file
@ -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");
|
||||
Loading…
Reference in New Issue
Block a user