/* * otg.c - ChipIdea USB IP core OTG driver * * Copyright (C) 2013 Freescale Semiconductor, Inc. * * Author: Peter Chen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /* * This file mainly handles otgsc register, OTG fsm operations for HNP and SRP * are also included. */ #include #include #include #include "ci.h" #include "bits.h" #include "otg.h" #include "otg_fsm.h" /** * hw_read_otgsc returns otgsc register bits value. * @mask: bitfield mask */ u32 hw_read_otgsc(struct ci_hdrc *ci, u32 mask) { struct ci_hdrc_cable *cable; u32 val = hw_read(ci, OP_OTGSC, mask); /* * If using extcon framework for VBUS and/or ID signal * detection overwrite OTGSC register value */ cable = &ci->platdata->vbus_extcon; if (!IS_ERR(cable->edev)) { if (cable->changed) val |= OTGSC_BSVIS; else val &= ~OTGSC_BSVIS; cable->changed = false; if (cable->state) val |= OTGSC_BSV; else val &= ~OTGSC_BSV; } cable = &ci->platdata->id_extcon; if (!IS_ERR(cable->edev)) { if (cable->changed) val |= OTGSC_IDIS; else val &= ~OTGSC_IDIS; cable->changed = false; if (cable->state) val |= OTGSC_ID; else val &= ~OTGSC_ID; } return val; } /** * hw_write_otgsc updates target bits of OTGSC register. * @mask: bitfield mask * @data: to be written */ void hw_write_otgsc(struct ci_hdrc *ci, u32 mask, u32 data) { hw_write(ci, OP_OTGSC, mask | OTGSC_INT_STATUS_BITS, data); } /** * ci_otg_role - pick role based on ID pin state * @ci: the controller */ enum ci_role ci_otg_role(struct ci_hdrc *ci) { enum ci_role role = hw_read_otgsc(ci, OTGSC_ID) ? CI_ROLE_GADGET : CI_ROLE_HOST; return role; } void ci_handle_vbus_change(struct ci_hdrc *ci) { if (!ci->is_otg) return; if (hw_read_otgsc(ci, OTGSC_BSV)) usb_gadget_vbus_connect(&ci->gadget); else usb_gadget_vbus_disconnect(&ci->gadget); } #define CI_VBUS_STABLE_TIMEOUT_MS 5000 static void ci_handle_id_switch(struct ci_hdrc *ci) { enum ci_role role = ci_otg_role(ci); if (role != ci->role) { dev_dbg(ci->dev, "switching from %s to %s\n", ci_role(ci)->name, ci->roles[role]->name); ci_role_stop(ci); if (role == CI_ROLE_GADGET) /* wait vbus lower than OTGSC_BSV */ hw_wait_reg(ci, OP_OTGSC, OTGSC_BSV, 0, CI_VBUS_STABLE_TIMEOUT_MS); ci_role_start(ci, role); } } /** * ci_otg_work - perform otg (vbus/id) event handle * @work: work struct */ static void ci_otg_work(struct work_struct *work) { struct ci_hdrc *ci = container_of(work, struct ci_hdrc, work); if (ci_otg_is_fsm_mode(ci) && !ci_otg_fsm_work(ci)) { enable_irq(ci->irq); return; } pm_runtime_get_sync(ci->dev); if (ci->id_event) { ci->id_event = false; ci_handle_id_switch(ci); } else if (ci->b_sess_valid_event) { ci->b_sess_valid_event = false; ci_handle_vbus_change(ci); } else dev_err(ci->dev, "unexpected event occurs at %s\n", __func__); pm_runtime_put_sync(ci->dev); enable_irq(ci->irq); } /** * ci_hdrc_otg_init - initialize otg struct * ci: the controller */ int ci_hdrc_otg_init(struct ci_hdrc *ci) { INIT_WORK(&ci->work, ci_otg_work); ci->wq = create_freezable_workqueue("ci_otg"); if (!ci->wq) { dev_err(ci->dev, "can't create workqueue\n"); return -ENODEV; } if (ci_otg_is_fsm_mode(ci)) return ci_hdrc_otg_fsm_init(ci); return 0; } /** * ci_hdrc_otg_destroy - destroy otg struct * ci: the controller */ void ci_hdrc_otg_destroy(struct ci_hdrc *ci) { if (ci->wq) { flush_workqueue(ci->wq); destroy_workqueue(ci->wq); } /* Disable all OTG irq and clear status */ hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS, OTGSC_INT_STATUS_BITS); if (ci_otg_is_fsm_mode(ci)) ci_hdrc_otg_fsm_remove(ci); } ext:space:mode:
authorJiri Kosina <jkosina@suse.cz>2017-01-27 22:25:52 +0000
committerIngo Molnar <mingo@kernel.org>2017-01-28 09:18:56 +0100
commitbf29bddf0417a4783da3b24e8c9e017ac649326f (patch)
tree54a05a4883b73f80e4e1d8c4b15750aa01c39932 /sound/soc/kirkwood/Kconfig
parent883af14e67e8b8702b5560aa64c888c0cd0bd66c (diff)
x86/efi: Always map the first physical page into the EFI pagetables
Commit: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") stopped creating 1:1 mappings for all RAM, when running in native 64-bit mode. It turns out though that there are 64-bit EFI implementations in the wild (this particular problem has been reported on a Lenovo Yoga 710-11IKB), which still make use of the first physical page for their own private use, even though they explicitly mark it EFI_CONVENTIONAL_MEMORY in the memory map. In case there is no mapping for this particular frame in the EFI pagetables, as soon as firmware tries to make use of it, a triple fault occurs and the system reboots (in case of the Yoga 710-11IKB this is very early during bootup). Fix that by always mapping the first page of physical memory into the EFI pagetables. We're free to hand this page to the BIOS, as trim_bios_range() will reserve the first page and isolate it away from memory allocators anyway. Note that just reverting 129766708 alone is not enough on v4.9-rc1+ to fix the regression on affected hardware, as this commit: ab72a27da ("x86/efi: Consolidate region mapping logic") later made the first physical frame not to be mapped anyway. Reported-by: Hanka Pavlikova <hanka@ucw.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Laura Abbott <labbott@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vojtech Pavlik <vojtech@ucw.cz> Cc: Waiman Long <waiman.long@hpe.com> Cc: linux-efi@vger.kernel.org Cc: stable@kernel.org # v4.8+ Fixes: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") Link: http://lkml.kernel.org/r/20170127222552.22336-1-matt@codeblueprint.co.uk [ Tidied up the changelog and the comment. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'sound/soc/kirkwood/Kconfig')