Changes in 4.9.229 power: supply: bq24257_charger: Replace depends on REGMAP_I2C with select clk: sunxi: Fix incorrect usage of round_down() i2c: piix4: Detect secondary SMBus controller on AMD AM4 chipsets iio: pressure: bmp280: Tolerate IRQ before registering clk: qcom: msm8916: Fix the address location of pll->config_reg backlight: lp855x: Ensure regulators are disabled on probe failure ARM: integrator: Add some Kconfig selections ALSA: isa/wavefront: prevent out of bounds write in ioctl scsi: qla2xxx: Fix issue with adapter's stopping state iio: bmp280: fix compensation of humidity i2c: pxa: clear all master action bits in i2c_pxa_stop_message() usblp: poison URBs upon disconnect PCI: aardvark: Don't blindly enable ASPM L0s and don't write to read-only register ps3disk: use the default segment boundary vfio/pci: fix memory leaks in alloc_perm_bits() mfd: wm8994: Fix driver operation if loaded as modules scsi: lpfc: Fix lpfc_nodelist leak when processing unsolicited event clk: clk-flexgen: fix clock-critical handling powerpc/perf/hv-24x7: Fix inconsistent output values incase multiple hv-24x7 events run nfsd: Fix svc_xprt refcnt leak when setup callback client failed powerpc/crashkernel: Take "mem=" option into account yam: fix possible memory leak in yam_init_driver mksysmap: Fix the mismatch of '.L' symbols in System.map scsi: sr: Fix sr_probe() missing deallocate of device minor scsi: ibmvscsi: Don't send host info in adapter info MAD after LPM ALSA: usb-audio: Improve frames size computation s390/qdio: put thinint indicator after early error tty: hvc: Fix data abort due to race in hvc_open staging: sm750fb: add missing case while setting FB_VISUAL i2c: pxa: fix i2c_pxa_scream_blue_murder() debug output serial: amba-pl011: Make sure we initialize the port.lock spinlock drivers: base: Fix NULL pointer exception in __platform_driver_probe() if a driver developer is foolish PCI: rcar: Fix incorrect programming of OB windows PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges power: supply: lp8788: Fix an error handling path in 'lp8788_charger_probe()' power: supply: smb347-charger: IRQSTAT_D is volatile scsi: mpt3sas: Fix double free warnings dlm: remove BUG() before panic() clk: ti: composite: fix memory leak tty: n_gsm: Fix SOF skipping tty: n_gsm: Fix waking up upper tty layer when room available powerpc/pseries/ras: Fix FWNMI_VALID off by one powerpc/ps3: Fix kexec shutdown hang vfio-pci: Mask cap zero usb/ohci-platform: Fix a warning when hibernating drm/msm/mdp5: Fix mdp5_init error path for failed mdp5_kms allocation USB: host: ehci-mxc: Add error handling in ehci_mxc_drv_probe() tty: n_gsm: Fix bogus i++ in gsm_data_kick clk: samsung: exynos5433: Add IGNORE_UNUSED flag to sclk_i2s1 powerpc/64s/pgtable: fix an undefined behaviour PCI/PTM: Inherit Switch Downstream Port PTM settings from Upstream Port IB/cma: Fix ports memory leak in cma_configfs watchdog: da9062: No need to ping manually before setting timeout usb: dwc2: gadget: move gadget resume after the core is in L0 state USB: gadget: udc: s3c2410_udc: Remove pointless NULL check in s3c2410_udc_nuke usb: gadget: lpc32xx_udc: don't dereference ep pointer before null check usb: gadget: fix potential double-free in m66592_probe. usb: gadget: Fix issue with config_ep_by_speed function clk: bcm2835: Fix return type of bcm2835_register_gate net: sunrpc: Fix off-by-one issues in 'rpc_ntop6' NFSv4.1 fix rpc_call_done assignment for BIND_CONN_TO_SESSION extcon: adc-jack: Fix an error handling path in 'adc_jack_probe()' ASoC: fsl_asrc_dma: Fix dma_chan leak when config DMA channel failed openrisc: Fix issue with argument clobbering for clone/fork gfs2: Allow lock_nolock mount to specify jid=X scsi: iscsi: Fix reference count leak in iscsi_boot_create_kobj pinctrl: imxl: Fix an error handling path in 'imx1_pinctrl_core_probe()' crypto: omap-sham - add proper load balancing support for multicore lib/zlib: remove outdated and incorrect pre-increment optimization include/linux/bitops.h: avoid clang shift-count-overflow warnings elfnote: mark all .note sections SHF_ALLOC selftests/vm/pkeys: fix alloc_random_pkey() to make it really random selftests/net: in timestamping, strncpy needs to preserve null byte scsi: acornscsi: Fix an error handling path in acornscsi_probe() usb/xhci-plat: Set PM runtime as active on resume usb/ehci-platform: Set PM runtime as active on resume perf report: Fix NULL pointer dereference in hists__fprintf_nr_sample_events() bcache: fix potential deadlock problem in btree_gc_coalesce block: Fix use-after-free in blkdev_get() libata: Use per port sync for detach drm: encoder_slave: fix refcouting error for modules drm/dp_mst: Reformat drm_dp_check_act_status() a bit drm/qxl: Use correct notify port address when creating cursor ring selinux: fix double free ext4: fix partial cluster initialization when splitting extent drm/dp_mst: Increase ACT retry timeout to 3s x86/boot/compressed: Relax sed symbol type regex for LLVM ld.lld block: nr_sects_write(): Disable preemption on seqcount write s390: fix syscall_get_error for compat processes drm/i915: Whitelist context-local timestamp in the gen9 cmdparser crypto: algboss - don't wait during notifier callback kprobes: Fix to protect kick_kprobe_optimizer() by kprobe_mutex powerpc/kprobes: Fixes for kprobe_lookup_name() on BE x86/kprobes: Avoid kretprobe recursion bug kretprobe: Prevent triggering kretprobe from within kprobe_flush_task e1000e: Do not wake up the system via WOL if device wakeup is disabled sched/rt, net: Use CONFIG_PREEMPTION.patch net: core: device_rename: Use rwsem instead of a seqcount media: dvb_frontend: initialize variable s with FE_NONE instead of 0 media: dvb/frontend.h: move out a private internal structure media: dvb/frontend.h: document the uAPI file media: dvb_frontend: get rid of get_property() callback media: stv0288: get rid of set_property boilerplate media: stv6110: get rid of a srate dead code media: friio-fe: get rid of set_property() media: dvb_frontend: get rid of set_property() callback media: dvb_frontend: cleanup dvb_frontend_ioctl_properties() media: dvb_frontend: cleanup ioctl handling logic media: dvb_frontend: get rid of property cache's state media: dvb_frontend: better document the -EPERM condition media: dvb_frontend: fix return values for FE_SET_PROPERTY media: dvb_frontend: dtv_property_process_set() cleanups media: dvb_frontend: be sure to init dvb_frontend_handle_ioctl() return code media: dvb_frontend: Add unlocked_ioctl in dvb_frontend.c media: dvb_frontend: Add compat_ioctl callback media: dvb_frontend: Add commands implementation for compat ioct media: dvb_frontend: fix wrong cast in compat_ioctl media: dvb_frontend: fix return error code mtd: rawnand: Pass a nand_chip object to nand_release() mtd: rawnand: diskonchip: Fix the probe error path mtd: rawnand: sharpsl: Fix the probe error path mtd: rawnand: xway: Fix the probe error path mtd: rawnand: orion: Fix the probe error path mtd: rawnand: socrates: Fix the probe error path mtd: rawnand: plat_nand: Fix the probe error path mtd: rawnand: mtk: Fix the probe error path mtd: rawnand: tmio: Fix the probe error path scsi: scsi_devinfo: handle non-terminated strings l2tp: Allow duplicate session creation with UDP net: sched: export __netdev_watchdog_up() fix a braino in "sparc32: fix register window handling in genregs32_[gs]et()" mld: fix memory leak in ipv6_mc_destroy_dev() net: fix memleak in register_netdevice() net: usb: ax88179_178a: fix packet alignment padding rocker: fix incorrect error handling in dma_rings_init rxrpc: Fix notification call on completion of discarded calls tg3: driver sleeps indefinitely when EEH errors exceed eeh_max_freezes ip_tunnel: fix use-after-free in ip_tunnel_lookup() tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT ip6_gre: fix use-after-free in ip6gre_tunnel_lookup() tcp: grow window for OOO packets only for SACK flows sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket net: Fix the arp error in some cases net: Do not clear the sock TX queue in sk_set_socket() net: core: reduce recursion limit value USB: ohci-sm501: Add missed iounmap() in remove usb: dwc2: Postponed gadget registration to the udc class driver usb: add USB_QUIRK_DELAY_INIT for Logitech C922 USB: ehci: reopen solution for Synopsys HC bug usb: host: ehci-exynos: Fix error check in exynos_ehci_probe() ALSA: usb-audio: add quirk for Denon DCD-1500RE xhci: Fix incorrect EP_STATE_MASK xhci: Fix enumeration issue when setting max packet size for FS devices. cdc-acm: Add DISABLE_ECHO quirk for Microchip/SMSC chip ALSA: usb-audio: uac1: Invalidate ctl on interrupt ALSA: usb-audio: Clean up mixer element list traverse ALSA: usb-audio: Fix OOB access of mixer element list xhci: Poll for U0 after disabling USB2 LPM cifs/smb3: Fix data inconsistent when punch hole cifs/smb3: Fix data inconsistent when zero file range efi/esrt: Fix reference count leak in esre_create_sysfs_entry. RDMA/mad: Fix possible memory leak in ib_mad_post_receive_mads() net: qed: fix left elements count calculation net: qed: fix NVMe login fails over VFs net: qed: fix excessive QM ILT lines consumption ARM: imx5: add missing put_device() call in imx_suspend_alloc_ocram() usb: gadget: udc: Potential Oops in error handling code netfilter: ipset: fix unaligned atomic access sched/core: Fix PI boosting between RT and DEADLINE tasks ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function net: alx: fix race condition in alx_remove s390/ptrace: fix setting syscall number kbuild: improve cc-option to clean up all temporary files blktrace: break out of blktrace setup on concurrent calls ALSA: hda: Add NVIDIA codec IDs 9a & 9d through a0 to patch table ACPI: sysfs: Fix pm_profile_attr type KVM: X86: Fix MSR range of APIC registers in X2APIC mode mm/slab: use memzero_explicit() in kzfree() ocfs2: load global_inode_alloc ocfs2: fix value of OCFS2_INVALID_SLOT ocfs2: fix panic on nfs server over ocfs2 arm64: perf: Report the PC value in REGS_ABI_32 mode tracing: Fix event trigger to accept redundant spaces drm/radeon: fix fb_div check in ni_init_smc_spll_table() sunrpc: fixed rollback in rpc_gssd_dummy_populate() SUNRPC: Properly set the @subbuf parameter of xdr_buf_subsegment() pNFS/flexfiles: Fix list corruption if the mirror count changes NFSv4 fix CLOSE not waiting for direct IO compeletion xfs: add agf freeblocks verify in xfs_agf_verify Revert "tty: hvc: Fix data abort due to race in hvc_open" Linux 4.9.229 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I0ce84c8f4c2c437fee36399c358c3dcc19fdfc1d
577 lines
16 KiB
C
577 lines
16 KiB
C
/*
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* core_intr.c - DesignWare HS OTG Controller common interrupt handling
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*
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* Copyright (C) 2004-2013 Synopsys, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the above-listed copyright holders may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any
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* later version.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file contains the common interrupt handlers
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/ch11.h>
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#include "core.h"
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#include "hcd.h"
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static const char *dwc2_op_state_str(struct dwc2_hsotg *hsotg)
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{
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switch (hsotg->op_state) {
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case OTG_STATE_A_HOST:
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return "a_host";
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case OTG_STATE_A_SUSPEND:
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return "a_suspend";
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case OTG_STATE_A_PERIPHERAL:
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return "a_peripheral";
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case OTG_STATE_B_PERIPHERAL:
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return "b_peripheral";
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case OTG_STATE_B_HOST:
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return "b_host";
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default:
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return "unknown";
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}
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}
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/**
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* dwc2_handle_usb_port_intr - handles OTG PRTINT interrupts.
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* When the PRTINT interrupt fires, there are certain status bits in the Host
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* Port that needs to get cleared.
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*
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* @hsotg: Programming view of DWC_otg controller
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*/
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static void dwc2_handle_usb_port_intr(struct dwc2_hsotg *hsotg)
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{
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u32 hprt0 = dwc2_readl(hsotg->regs + HPRT0);
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if (hprt0 & HPRT0_ENACHG) {
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hprt0 &= ~HPRT0_ENA;
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dwc2_writel(hprt0, hsotg->regs + HPRT0);
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}
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}
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/**
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* dwc2_handle_mode_mismatch_intr() - Logs a mode mismatch warning message
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*
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* @hsotg: Programming view of DWC_otg controller
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*/
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static void dwc2_handle_mode_mismatch_intr(struct dwc2_hsotg *hsotg)
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{
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/* Clear interrupt */
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dwc2_writel(GINTSTS_MODEMIS, hsotg->regs + GINTSTS);
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dev_warn(hsotg->dev, "Mode Mismatch Interrupt: currently in %s mode\n",
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dwc2_is_host_mode(hsotg) ? "Host" : "Device");
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}
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/**
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* dwc2_handle_otg_intr() - Handles the OTG Interrupts. It reads the OTG
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* Interrupt Register (GOTGINT) to determine what interrupt has occurred.
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*
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* @hsotg: Programming view of DWC_otg controller
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*/
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static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
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{
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u32 gotgint;
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u32 gotgctl;
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u32 gintmsk;
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gotgint = dwc2_readl(hsotg->regs + GOTGINT);
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gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
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dev_dbg(hsotg->dev, "++OTG Interrupt gotgint=%0x [%s]\n", gotgint,
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dwc2_op_state_str(hsotg));
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if (gotgint & GOTGINT_SES_END_DET) {
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dev_dbg(hsotg->dev,
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" ++OTG Interrupt: Session End Detected++ (%s)\n",
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dwc2_op_state_str(hsotg));
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gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
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if (dwc2_is_device_mode(hsotg))
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dwc2_hsotg_disconnect(hsotg);
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if (hsotg->op_state == OTG_STATE_B_HOST) {
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hsotg->op_state = OTG_STATE_B_PERIPHERAL;
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} else {
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/*
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* If not B_HOST and Device HNP still set, HNP did
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* not succeed!
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*/
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if (gotgctl & GOTGCTL_DEVHNPEN) {
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dev_dbg(hsotg->dev, "Session End Detected\n");
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dev_err(hsotg->dev,
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"Device Not Connected/Responding!\n");
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}
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/*
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* If Session End Detected the B-Cable has been
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* disconnected
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*/
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/* Reset to a clean state */
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hsotg->lx_state = DWC2_L0;
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}
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gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
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gotgctl &= ~GOTGCTL_DEVHNPEN;
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dwc2_writel(gotgctl, hsotg->regs + GOTGCTL);
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}
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if (gotgint & GOTGINT_SES_REQ_SUC_STS_CHNG) {
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dev_dbg(hsotg->dev,
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" ++OTG Interrupt: Session Request Success Status Change++\n");
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gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
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if (gotgctl & GOTGCTL_SESREQSCS) {
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if (hsotg->core_params->phy_type ==
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DWC2_PHY_TYPE_PARAM_FS
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&& hsotg->core_params->i2c_enable > 0) {
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hsotg->srp_success = 1;
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} else {
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/* Clear Session Request */
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gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
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gotgctl &= ~GOTGCTL_SESREQ;
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dwc2_writel(gotgctl, hsotg->regs + GOTGCTL);
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}
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}
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}
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if (gotgint & GOTGINT_HST_NEG_SUC_STS_CHNG) {
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/*
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* Print statements during the HNP interrupt handling
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* can cause it to fail
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*/
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gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
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/*
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* WA for 3.00a- HW is not setting cur_mode, even sometimes
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* this does not help
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*/
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if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a)
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udelay(100);
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if (gotgctl & GOTGCTL_HSTNEGSCS) {
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if (dwc2_is_host_mode(hsotg)) {
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hsotg->op_state = OTG_STATE_B_HOST;
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/*
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* Need to disable SOF interrupt immediately.
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* When switching from device to host, the PCD
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* interrupt handler won't handle the interrupt
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* if host mode is already set. The HCD
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* interrupt handler won't get called if the
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* HCD state is HALT. This means that the
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* interrupt does not get handled and Linux
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* complains loudly.
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*/
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gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
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gintmsk &= ~GINTSTS_SOF;
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dwc2_writel(gintmsk, hsotg->regs + GINTMSK);
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/*
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* Call callback function with spin lock
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* released
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*/
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spin_unlock(&hsotg->lock);
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/* Initialize the Core for Host mode */
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dwc2_hcd_start(hsotg);
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spin_lock(&hsotg->lock);
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hsotg->op_state = OTG_STATE_B_HOST;
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}
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} else {
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gotgctl = dwc2_readl(hsotg->regs + GOTGCTL);
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gotgctl &= ~(GOTGCTL_HNPREQ | GOTGCTL_DEVHNPEN);
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dwc2_writel(gotgctl, hsotg->regs + GOTGCTL);
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dev_dbg(hsotg->dev, "HNP Failed\n");
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dev_err(hsotg->dev,
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"Device Not Connected/Responding\n");
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}
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}
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if (gotgint & GOTGINT_HST_NEG_DET) {
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/*
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* The disconnect interrupt is set at the same time as
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* Host Negotiation Detected. During the mode switch all
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* interrupts are cleared so the disconnect interrupt
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* handler will not get executed.
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*/
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dev_dbg(hsotg->dev,
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" ++OTG Interrupt: Host Negotiation Detected++ (%s)\n",
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(dwc2_is_host_mode(hsotg) ? "Host" : "Device"));
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if (dwc2_is_device_mode(hsotg)) {
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dev_dbg(hsotg->dev, "a_suspend->a_peripheral (%d)\n",
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hsotg->op_state);
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spin_unlock(&hsotg->lock);
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dwc2_hcd_disconnect(hsotg, false);
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spin_lock(&hsotg->lock);
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hsotg->op_state = OTG_STATE_A_PERIPHERAL;
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} else {
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/* Need to disable SOF interrupt immediately */
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gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
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gintmsk &= ~GINTSTS_SOF;
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dwc2_writel(gintmsk, hsotg->regs + GINTMSK);
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spin_unlock(&hsotg->lock);
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dwc2_hcd_start(hsotg);
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spin_lock(&hsotg->lock);
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hsotg->op_state = OTG_STATE_A_HOST;
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}
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}
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if (gotgint & GOTGINT_A_DEV_TOUT_CHG)
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dev_dbg(hsotg->dev,
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" ++OTG Interrupt: A-Device Timeout Change++\n");
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if (gotgint & GOTGINT_DBNCE_DONE)
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dev_dbg(hsotg->dev, " ++OTG Interrupt: Debounce Done++\n");
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/* Clear GOTGINT */
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dwc2_writel(gotgint, hsotg->regs + GOTGINT);
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}
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/**
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* dwc2_handle_conn_id_status_change_intr() - Handles the Connector ID Status
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* Change Interrupt
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*
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* @hsotg: Programming view of DWC_otg controller
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*
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* Reads the OTG Interrupt Register (GOTCTL) to determine whether this is a
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* Device to Host Mode transition or a Host to Device Mode transition. This only
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* occurs when the cable is connected/removed from the PHY connector.
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*/
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static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
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{
|
|
u32 gintmsk;
|
|
|
|
/* Clear interrupt */
|
|
dwc2_writel(GINTSTS_CONIDSTSCHNG, hsotg->regs + GINTSTS);
|
|
|
|
/* Need to disable SOF interrupt immediately */
|
|
gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
|
|
gintmsk &= ~GINTSTS_SOF;
|
|
dwc2_writel(gintmsk, hsotg->regs + GINTMSK);
|
|
|
|
dev_dbg(hsotg->dev, " ++Connector ID Status Change Interrupt++ (%s)\n",
|
|
dwc2_is_host_mode(hsotg) ? "Host" : "Device");
|
|
|
|
/*
|
|
* Need to schedule a work, as there are possible DELAY function calls.
|
|
* Release lock before scheduling workq as it holds spinlock during
|
|
* scheduling.
|
|
*/
|
|
if (hsotg->wq_otg) {
|
|
spin_unlock(&hsotg->lock);
|
|
queue_work(hsotg->wq_otg, &hsotg->wf_otg);
|
|
spin_lock(&hsotg->lock);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* dwc2_handle_session_req_intr() - This interrupt indicates that a device is
|
|
* initiating the Session Request Protocol to request the host to turn on bus
|
|
* power so a new session can begin
|
|
*
|
|
* @hsotg: Programming view of DWC_otg controller
|
|
*
|
|
* This handler responds by turning on bus power. If the DWC_otg controller is
|
|
* in low power mode, this handler brings the controller out of low power mode
|
|
* before turning on bus power.
|
|
*/
|
|
static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
|
|
{
|
|
int ret;
|
|
|
|
/* Clear interrupt */
|
|
dwc2_writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS);
|
|
|
|
dev_dbg(hsotg->dev, "Session request interrupt - lx_state=%d\n",
|
|
hsotg->lx_state);
|
|
|
|
if (dwc2_is_device_mode(hsotg)) {
|
|
if (hsotg->lx_state == DWC2_L2) {
|
|
ret = dwc2_exit_hibernation(hsotg, true);
|
|
if (ret && (ret != -ENOTSUPP))
|
|
dev_err(hsotg->dev,
|
|
"exit hibernation failed\n");
|
|
}
|
|
|
|
/*
|
|
* Report disconnect if there is any previous session
|
|
* established
|
|
*/
|
|
dwc2_hsotg_disconnect(hsotg);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This interrupt indicates that the DWC_otg controller has detected a
|
|
* resume or remote wakeup sequence. If the DWC_otg controller is in
|
|
* low power mode, the handler must brings the controller out of low
|
|
* power mode. The controller automatically begins resume signaling.
|
|
* The handler schedules a time to stop resume signaling.
|
|
*/
|
|
static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
|
|
{
|
|
int ret;
|
|
|
|
/* Clear interrupt */
|
|
dwc2_writel(GINTSTS_WKUPINT, hsotg->regs + GINTSTS);
|
|
|
|
dev_dbg(hsotg->dev, "++Resume or Remote Wakeup Detected Interrupt++\n");
|
|
dev_dbg(hsotg->dev, "%s lxstate = %d\n", __func__, hsotg->lx_state);
|
|
|
|
if (dwc2_is_device_mode(hsotg)) {
|
|
dev_dbg(hsotg->dev, "DSTS=0x%0x\n",
|
|
dwc2_readl(hsotg->regs + DSTS));
|
|
if (hsotg->lx_state == DWC2_L2) {
|
|
u32 dctl = dwc2_readl(hsotg->regs + DCTL);
|
|
|
|
/* Clear Remote Wakeup Signaling */
|
|
dctl &= ~DCTL_RMTWKUPSIG;
|
|
dwc2_writel(dctl, hsotg->regs + DCTL);
|
|
ret = dwc2_exit_hibernation(hsotg, true);
|
|
if (ret && (ret != -ENOTSUPP))
|
|
dev_err(hsotg->dev, "exit hibernation failed\n");
|
|
|
|
/* Change to L0 state */
|
|
hsotg->lx_state = DWC2_L0;
|
|
call_gadget(hsotg, resume);
|
|
} else {
|
|
/* Change to L0 state */
|
|
hsotg->lx_state = DWC2_L0;
|
|
}
|
|
} else {
|
|
if (hsotg->core_params->hibernation)
|
|
return;
|
|
|
|
if (hsotg->lx_state != DWC2_L1) {
|
|
u32 pcgcctl = dwc2_readl(hsotg->regs + PCGCTL);
|
|
|
|
/* Restart the Phy Clock */
|
|
pcgcctl &= ~PCGCTL_STOPPCLK;
|
|
dwc2_writel(pcgcctl, hsotg->regs + PCGCTL);
|
|
mod_timer(&hsotg->wkp_timer,
|
|
jiffies + msecs_to_jiffies(71));
|
|
} else {
|
|
/* Change to L0 state */
|
|
hsotg->lx_state = DWC2_L0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This interrupt indicates that a device has been disconnected from the
|
|
* root port
|
|
*/
|
|
static void dwc2_handle_disconnect_intr(struct dwc2_hsotg *hsotg)
|
|
{
|
|
dwc2_writel(GINTSTS_DISCONNINT, hsotg->regs + GINTSTS);
|
|
|
|
dev_dbg(hsotg->dev, "++Disconnect Detected Interrupt++ (%s) %s\n",
|
|
dwc2_is_host_mode(hsotg) ? "Host" : "Device",
|
|
dwc2_op_state_str(hsotg));
|
|
|
|
if (hsotg->op_state == OTG_STATE_A_HOST)
|
|
dwc2_hcd_disconnect(hsotg, false);
|
|
}
|
|
|
|
/*
|
|
* This interrupt indicates that SUSPEND state has been detected on the USB.
|
|
*
|
|
* For HNP the USB Suspend interrupt signals the change from "a_peripheral"
|
|
* to "a_host".
|
|
*
|
|
* When power management is enabled the core will be put in low power mode.
|
|
*/
|
|
static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
|
|
{
|
|
u32 dsts;
|
|
int ret;
|
|
|
|
/* Clear interrupt */
|
|
dwc2_writel(GINTSTS_USBSUSP, hsotg->regs + GINTSTS);
|
|
|
|
dev_dbg(hsotg->dev, "USB SUSPEND\n");
|
|
|
|
if (dwc2_is_device_mode(hsotg)) {
|
|
/*
|
|
* Check the Device status register to determine if the Suspend
|
|
* state is active
|
|
*/
|
|
dsts = dwc2_readl(hsotg->regs + DSTS);
|
|
dev_dbg(hsotg->dev, "DSTS=0x%0x\n", dsts);
|
|
dev_dbg(hsotg->dev,
|
|
"DSTS.Suspend Status=%d HWCFG4.Power Optimize=%d\n",
|
|
!!(dsts & DSTS_SUSPSTS),
|
|
hsotg->hw_params.power_optimized);
|
|
if ((dsts & DSTS_SUSPSTS) && hsotg->hw_params.power_optimized) {
|
|
/* Ignore suspend request before enumeration */
|
|
if (!dwc2_is_device_connected(hsotg)) {
|
|
dev_dbg(hsotg->dev,
|
|
"ignore suspend request before enumeration\n");
|
|
return;
|
|
}
|
|
|
|
ret = dwc2_enter_hibernation(hsotg);
|
|
if (ret) {
|
|
if (ret != -ENOTSUPP)
|
|
dev_err(hsotg->dev,
|
|
"enter hibernation failed\n");
|
|
goto skip_power_saving;
|
|
}
|
|
|
|
udelay(100);
|
|
|
|
/* Ask phy to be suspended */
|
|
if (!IS_ERR_OR_NULL(hsotg->uphy))
|
|
usb_phy_set_suspend(hsotg->uphy, true);
|
|
skip_power_saving:
|
|
/*
|
|
* Change to L2 (suspend) state before releasing
|
|
* spinlock
|
|
*/
|
|
hsotg->lx_state = DWC2_L2;
|
|
|
|
/* Call gadget suspend callback */
|
|
call_gadget(hsotg, suspend);
|
|
}
|
|
} else {
|
|
if (hsotg->op_state == OTG_STATE_A_PERIPHERAL) {
|
|
dev_dbg(hsotg->dev, "a_peripheral->a_host\n");
|
|
|
|
/* Change to L2 (suspend) state */
|
|
hsotg->lx_state = DWC2_L2;
|
|
/* Clear the a_peripheral flag, back to a_host */
|
|
spin_unlock(&hsotg->lock);
|
|
dwc2_hcd_start(hsotg);
|
|
spin_lock(&hsotg->lock);
|
|
hsotg->op_state = OTG_STATE_A_HOST;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define GINTMSK_COMMON (GINTSTS_WKUPINT | GINTSTS_SESSREQINT | \
|
|
GINTSTS_CONIDSTSCHNG | GINTSTS_OTGINT | \
|
|
GINTSTS_MODEMIS | GINTSTS_DISCONNINT | \
|
|
GINTSTS_USBSUSP | GINTSTS_PRTINT)
|
|
|
|
/*
|
|
* This function returns the Core Interrupt register
|
|
*/
|
|
static u32 dwc2_read_common_intr(struct dwc2_hsotg *hsotg)
|
|
{
|
|
u32 gintsts;
|
|
u32 gintmsk;
|
|
u32 gahbcfg;
|
|
u32 gintmsk_common = GINTMSK_COMMON;
|
|
|
|
gintsts = dwc2_readl(hsotg->regs + GINTSTS);
|
|
gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
|
|
gahbcfg = dwc2_readl(hsotg->regs + GAHBCFG);
|
|
|
|
/* If any common interrupts set */
|
|
if (gintsts & gintmsk_common)
|
|
dev_dbg(hsotg->dev, "gintsts=%08x gintmsk=%08x\n",
|
|
gintsts, gintmsk);
|
|
|
|
if (gahbcfg & GAHBCFG_GLBL_INTR_EN)
|
|
return gintsts & gintmsk & gintmsk_common;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Common interrupt handler
|
|
*
|
|
* The common interrupts are those that occur in both Host and Device mode.
|
|
* This handler handles the following interrupts:
|
|
* - Mode Mismatch Interrupt
|
|
* - OTG Interrupt
|
|
* - Connector ID Status Change Interrupt
|
|
* - Disconnect Interrupt
|
|
* - Session Request Interrupt
|
|
* - Resume / Remote Wakeup Detected Interrupt
|
|
* - Suspend Interrupt
|
|
*/
|
|
irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
|
|
{
|
|
struct dwc2_hsotg *hsotg = dev;
|
|
u32 gintsts;
|
|
irqreturn_t retval = IRQ_NONE;
|
|
|
|
spin_lock(&hsotg->lock);
|
|
|
|
if (!dwc2_is_controller_alive(hsotg)) {
|
|
dev_warn(hsotg->dev, "Controller is dead\n");
|
|
goto out;
|
|
}
|
|
|
|
gintsts = dwc2_read_common_intr(hsotg);
|
|
if (gintsts & ~GINTSTS_PRTINT)
|
|
retval = IRQ_HANDLED;
|
|
|
|
if (gintsts & GINTSTS_MODEMIS)
|
|
dwc2_handle_mode_mismatch_intr(hsotg);
|
|
if (gintsts & GINTSTS_OTGINT)
|
|
dwc2_handle_otg_intr(hsotg);
|
|
if (gintsts & GINTSTS_CONIDSTSCHNG)
|
|
dwc2_handle_conn_id_status_change_intr(hsotg);
|
|
if (gintsts & GINTSTS_DISCONNINT)
|
|
dwc2_handle_disconnect_intr(hsotg);
|
|
if (gintsts & GINTSTS_SESSREQINT)
|
|
dwc2_handle_session_req_intr(hsotg);
|
|
if (gintsts & GINTSTS_WKUPINT)
|
|
dwc2_handle_wakeup_detected_intr(hsotg);
|
|
if (gintsts & GINTSTS_USBSUSP)
|
|
dwc2_handle_usb_suspend_intr(hsotg);
|
|
|
|
if (gintsts & GINTSTS_PRTINT) {
|
|
/*
|
|
* The port interrupt occurs while in device mode with HPRT0
|
|
* Port Enable/Disable
|
|
*/
|
|
if (dwc2_is_device_mode(hsotg)) {
|
|
dev_dbg(hsotg->dev,
|
|
" --Port interrupt received in Device mode--\n");
|
|
dwc2_handle_usb_port_intr(hsotg);
|
|
retval = IRQ_HANDLED;
|
|
}
|
|
}
|
|
|
|
out:
|
|
spin_unlock(&hsotg->lock);
|
|
return retval;
|
|
}
|