From 97c4cb71c18fe045a763ff6681a8ebbbbbec0b2b Mon Sep 17 00:00:00 2001 From: Daniel Drake <dsd@laptop.org> Date: Sat, 25 Jun 2011 17:34:11 +0100 Subject: x86, olpc: Add XO-1 suspend/resume support Add code needed for basic suspend/resume of the XO-1 laptop. Based on earlier work by Jordan Crouse, Andres Salomon, and others. This patch incorporates all earlier feedback from Thomas Gleixner. To clarify a certain point (now more obvious in the code itself): On resume, OpenFirmware returns execution to Linux in protected mode with a kernel-compatible GDT already set up. The changes and simplifications suggested have all been included. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-5-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> --- arch/x86/include/asm/olpc.h | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/olpc.h b/arch/x86/include/asm/olpc.h index 5ca6801b75f3..10ea59594b71 100644 --- a/arch/x86/include/asm/olpc.h +++ b/arch/x86/include/asm/olpc.h @@ -76,6 +76,12 @@ static inline int olpc_has_dcon(void) #endif +#ifdef CONFIG_OLPC_XO1_PM +extern void do_olpc_suspend_lowlevel(void); +extern void olpc_xo1_pm_wakeup_set(u16 value); +extern void olpc_xo1_pm_wakeup_clear(u16 value); +#endif + extern int pci_olpc_init(void); /* EC related functions */ @@ -88,9 +94,12 @@ extern int olpc_ec_mask_unset(uint8_t bits); /* EC commands */ -#define EC_FIRMWARE_REV 0x08 -#define EC_WLAN_ENTER_RESET 0x35 -#define EC_WLAN_LEAVE_RESET 0x25 +#define EC_FIRMWARE_REV 0x08 +#define EC_WAKE_UP_WLAN 0x24 +#define EC_WLAN_LEAVE_RESET 0x25 +#define EC_SET_SCI_INHIBIT 0x32 +#define EC_SET_SCI_INHIBIT_RELEASE 0x34 +#define EC_WLAN_ENTER_RESET 0x35 /* SCI source values */ -- cgit v1.2.2 From bc4ecd5a5efc2435e6debfb7b279a15ae96697fd Mon Sep 17 00:00:00 2001 From: Daniel Drake <dsd@laptop.org> Date: Sat, 25 Jun 2011 17:34:13 +0100 Subject: x86, olpc: EC SCI wakeup mask functionality Update the EC SCI masks with recent additions. Add functions to query SCI events and set the wakeup mask, to be used by followup patches. Add functions to tweak an event mask used to select certain EC events as a system wakeup source. Also add a function to determine if EC wakeup functionality is available, as this depends on child drivers (different for each laptop model) to configure the SCI interrupt. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-7-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> --- arch/x86/include/asm/olpc.h | 31 +++++++++++++++++++++++++------ 1 file changed, 25 insertions(+), 6 deletions(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/olpc.h b/arch/x86/include/asm/olpc.h index 10ea59594b71..0e56d01907fe 100644 --- a/arch/x86/include/asm/olpc.h +++ b/arch/x86/include/asm/olpc.h @@ -13,6 +13,7 @@ struct olpc_platform_t { #define OLPC_F_PRESENT 0x01 #define OLPC_F_DCON 0x02 +#define OLPC_F_EC_WIDE_SCI 0x04 #ifdef CONFIG_OLPC @@ -62,6 +63,13 @@ static inline int olpc_board_at_least(uint32_t rev) return olpc_platform_info.boardrev >= rev; } +extern void olpc_ec_wakeup_set(u16 value); +extern void olpc_ec_wakeup_clear(u16 value); +extern bool olpc_ec_wakeup_available(void); + +extern int olpc_ec_mask_write(u16 bits); +extern int olpc_ec_sci_query(u16 *sci_value); + #else static inline int machine_is_olpc(void) @@ -74,6 +82,14 @@ static inline int olpc_has_dcon(void) return 0; } +static inline void olpc_ec_wakeup_set(u16 value) { } +static inline void olpc_ec_wakeup_clear(u16 value) { } + +static inline bool olpc_ec_wakeup_available(void) +{ + return false; +} + #endif #ifdef CONFIG_OLPC_XO1_PM @@ -89,17 +105,18 @@ extern int pci_olpc_init(void); extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen, unsigned char *outbuf, size_t outlen); -extern int olpc_ec_mask_set(uint8_t bits); -extern int olpc_ec_mask_unset(uint8_t bits); - /* EC commands */ #define EC_FIRMWARE_REV 0x08 +#define EC_WRITE_SCI_MASK 0x1b #define EC_WAKE_UP_WLAN 0x24 #define EC_WLAN_LEAVE_RESET 0x25 #define EC_SET_SCI_INHIBIT 0x32 #define EC_SET_SCI_INHIBIT_RELEASE 0x34 #define EC_WLAN_ENTER_RESET 0x35 +#define EC_WRITE_EXT_SCI_MASK 0x38 +#define EC_SCI_QUERY 0x84 +#define EC_EXT_SCI_QUERY 0x85 /* SCI source values */ @@ -108,10 +125,12 @@ extern int olpc_ec_mask_unset(uint8_t bits); #define EC_SCI_SRC_BATTERY 0x02 #define EC_SCI_SRC_BATSOC 0x04 #define EC_SCI_SRC_BATERR 0x08 -#define EC_SCI_SRC_EBOOK 0x10 -#define EC_SCI_SRC_WLAN 0x20 +#define EC_SCI_SRC_EBOOK 0x10 /* XO-1 only */ +#define EC_SCI_SRC_WLAN 0x20 /* XO-1 only */ #define EC_SCI_SRC_ACPWR 0x40 -#define EC_SCI_SRC_ALL 0x7F +#define EC_SCI_SRC_BATCRIT 0x80 +#define EC_SCI_SRC_GPWAKE 0x100 /* XO-1.5 only */ +#define EC_SCI_SRC_ALL 0x1FF /* GPIO assignments */ -- cgit v1.2.2 From 7bc74b3df73776fe06f3df9fafd2d2698e6ca28a Mon Sep 17 00:00:00 2001 From: Daniel Drake <dsd@laptop.org> Date: Sat, 25 Jun 2011 17:34:14 +0100 Subject: x86, olpc-xo1-sci: Add GPE handler and ebook switch functionality The EC in the OLPC XO-1 delivers GPE events to provide various notifications. Add the basic code for GPE/EC event processing and enable the ebook switch, which can be used as a wakeup source. Signed-off-by: Daniel Drake <dsd@laptop.org> Link: http://lkml.kernel.org/r/1309019658-1712-8-git-send-email-dsd@laptop.org Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> --- arch/x86/include/asm/olpc.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/olpc.h b/arch/x86/include/asm/olpc.h index 0e56d01907fe..87bdbca72f94 100644 --- a/arch/x86/include/asm/olpc.h +++ b/arch/x86/include/asm/olpc.h @@ -111,6 +111,7 @@ extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen, #define EC_WRITE_SCI_MASK 0x1b #define EC_WAKE_UP_WLAN 0x24 #define EC_WLAN_LEAVE_RESET 0x25 +#define EC_READ_EB_MODE 0x2a #define EC_SET_SCI_INHIBIT 0x32 #define EC_SET_SCI_INHIBIT_RELEASE 0x34 #define EC_WLAN_ENTER_RESET 0x35 @@ -144,7 +145,7 @@ extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen, #define OLPC_GPIO_SMB_CLK 14 #define OLPC_GPIO_SMB_DATA 15 #define OLPC_GPIO_WORKAUX geode_gpio(24) -#define OLPC_GPIO_LID geode_gpio(26) -#define OLPC_GPIO_ECSCI geode_gpio(27) +#define OLPC_GPIO_LID 26 +#define OLPC_GPIO_ECSCI 27 #endif /* _ASM_X86_OLPC_H */ -- cgit v1.2.2 From 0e9a6cb5e66f4b23e2a8f6b3f00949b7b3125dda Mon Sep 17 00:00:00 2001 From: Mike Frysinger <vapier@gentoo.org> Date: Tue, 26 Jul 2011 16:08:31 -0700 Subject: ptrace: unify show_regs() prototype [ poleg@redhat.com: no need to declare show_regs() in ptrace.h, sched.h does this ] Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- arch/x86/include/asm/kdebug.h | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/kdebug.h b/arch/x86/include/asm/kdebug.h index fe2cc6e105fa..d73f1571bde7 100644 --- a/arch/x86/include/asm/kdebug.h +++ b/arch/x86/include/asm/kdebug.h @@ -28,7 +28,6 @@ extern void show_registers(struct pt_regs *regs); extern void show_trace(struct task_struct *t, struct pt_regs *regs, unsigned long *sp, unsigned long bp); extern void __show_regs(struct pt_regs *regs, int all); -extern void show_regs(struct pt_regs *regs); extern unsigned long oops_begin(void); extern void oops_end(unsigned long, struct pt_regs *, int signr); #ifdef CONFIG_KEXEC -- cgit v1.2.2 From 148817ba092f9f6edd35bad3c6c6b8e8f90fe2ed Mon Sep 17 00:00:00 2001 From: Akinobu Mita <akinobu.mita@gmail.com> Date: Tue, 26 Jul 2011 16:09:04 -0700 Subject: asm-generic: add another generic ext2 atomic bitops The majority of architectures implement ext2 atomic bitops as test_and_{set,clear}_bit() without spinlock. This adds this type of generic implementation in ext2-atomic-setbit.h and use it wherever possible. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Suggested-by: Andreas Dilger <adilger@dilger.ca> Suggested-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- arch/x86/include/asm/bitops.h | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h index 69d58131bc8e..1775d6e5920e 100644 --- a/arch/x86/include/asm/bitops.h +++ b/arch/x86/include/asm/bitops.h @@ -458,10 +458,7 @@ static inline int fls(int x) #include <asm-generic/bitops/le.h> -#define ext2_set_bit_atomic(lock, nr, addr) \ - test_and_set_bit((nr), (unsigned long *)(addr)) -#define ext2_clear_bit_atomic(lock, nr, addr) \ - test_and_clear_bit((nr), (unsigned long *)(addr)) +#include <asm-generic/bitops/ext2-atomic-setbit.h> #endif /* __KERNEL__ */ #endif /* _ASM_X86_BITOPS_H */ -- cgit v1.2.2 From 60063497a95e716c9a689af3be2687d261f115b4 Mon Sep 17 00:00:00 2001 From: Arun Sharma <asharma@fb.com> Date: Tue, 26 Jul 2011 16:09:06 -0700 Subject: atomic: use <linux/atomic.h> This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- arch/x86/include/asm/apic.h | 2 +- arch/x86/include/asm/atomic.h | 1 - arch/x86/include/asm/hw_irq.h | 2 +- arch/x86/include/asm/local.h | 2 +- arch/x86/include/asm/mce.h | 2 +- arch/x86/include/asm/mmu_context.h | 2 +- arch/x86/include/asm/prom.h | 2 +- arch/x86/include/asm/spinlock.h | 2 +- arch/x86/include/asm/thread_info.h | 2 +- 9 files changed, 8 insertions(+), 9 deletions(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h index 4a0b7c7e2cce..7b3ca8324b69 100644 --- a/arch/x86/include/asm/apic.h +++ b/arch/x86/include/asm/apic.h @@ -8,7 +8,7 @@ #include <asm/cpufeature.h> #include <asm/processor.h> #include <asm/apicdef.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/fixmap.h> #include <asm/mpspec.h> #include <asm/system.h> diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 952a826ac4e5..897969bdd4e6 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -244,7 +244,6 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u) return c != (u); } -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) /* * atomic_dec_if_positive - decrement by 1 if old value positive diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index 13f5504c76c0..09199052060f 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -21,7 +21,7 @@ #include <linux/profile.h> #include <linux/smp.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/irq.h> #include <asm/sections.h> diff --git a/arch/x86/include/asm/local.h b/arch/x86/include/asm/local.h index 2e9972468a5d..9cdae5d47e8f 100644 --- a/arch/x86/include/asm/local.h +++ b/arch/x86/include/asm/local.h @@ -4,7 +4,7 @@ #include <linux/percpu.h> #include <asm/system.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/asm.h> typedef struct { diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index 716b48af7863..c9321f34e55b 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -124,7 +124,7 @@ extern struct atomic_notifier_head x86_mce_decoder_chain; #include <linux/percpu.h> #include <linux/init.h> -#include <asm/atomic.h> +#include <linux/atomic.h> extern int mce_disabled; extern int mce_p5_enabled; diff --git a/arch/x86/include/asm/mmu_context.h b/arch/x86/include/asm/mmu_context.h index 8b5393ec1080..69021528b43c 100644 --- a/arch/x86/include/asm/mmu_context.h +++ b/arch/x86/include/asm/mmu_context.h @@ -2,7 +2,7 @@ #define _ASM_X86_MMU_CONTEXT_H #include <asm/desc.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/pgalloc.h> #include <asm/tlbflush.h> #include <asm/paravirt.h> diff --git a/arch/x86/include/asm/prom.h b/arch/x86/include/asm/prom.h index df1287019e6d..644dd885f05a 100644 --- a/arch/x86/include/asm/prom.h +++ b/arch/x86/include/asm/prom.h @@ -19,7 +19,7 @@ #include <linux/pci.h> #include <asm/irq.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/setup.h> #include <asm/irq_controller.h> diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h index e9e51f710e6c..ee67edf86fdd 100644 --- a/arch/x86/include/asm/spinlock.h +++ b/arch/x86/include/asm/spinlock.h @@ -1,7 +1,7 @@ #ifndef _ASM_X86_SPINLOCK_H #define _ASM_X86_SPINLOCK_H -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/page.h> #include <asm/processor.h> #include <linux/compiler.h> diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index 1f2e61e28981..a1fe5c127b52 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -21,7 +21,7 @@ struct task_struct; struct exec_domain; #include <asm/processor.h> #include <asm/ftrace.h> -#include <asm/atomic.h> +#include <linux/atomic.h> struct thread_info { struct task_struct *task; /* main task structure */ -- cgit v1.2.2 From f24219b4e90cf70ec4a211b17fbabc725a0ddf3c Mon Sep 17 00:00:00 2001 From: Arun Sharma <asharma@fb.com> Date: Tue, 26 Jul 2011 16:09:07 -0700 Subject: atomic: move atomic_add_unless to generic code This is in preparation for more generic atomic primitives based on __atomic_add_unless. Signed-off-by: Arun Sharma <asharma@fb.com> Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- arch/x86/include/asm/atomic.h | 8 ++++---- arch/x86/include/asm/atomic64_32.h | 2 +- arch/x86/include/asm/atomic64_64.h | 2 +- 3 files changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 897969bdd4e6..5fe9cb335cd2 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -221,15 +221,15 @@ static inline int atomic_xchg(atomic_t *v, int new) } /** - * atomic_add_unless - add unless the number is already a given value + * __atomic_add_unless - add unless the number is already a given value * @v: pointer of type atomic_t * @a: the amount to add to v... * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as @v was not already @u. - * Returns non-zero if @v was not @u, and zero otherwise. + * Returns the old value of @v. */ -static inline int atomic_add_unless(atomic_t *v, int a, int u) +static inline int __atomic_add_unless(atomic_t *v, int a, int u) { int c, old; c = atomic_read(v); @@ -241,7 +241,7 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u) break; c = old; } - return c != (u); + return c; } diff --git a/arch/x86/include/asm/atomic64_32.h b/arch/x86/include/asm/atomic64_32.h index 2a934aa19a43..24098aafce0d 100644 --- a/arch/x86/include/asm/atomic64_32.h +++ b/arch/x86/include/asm/atomic64_32.h @@ -263,7 +263,7 @@ static inline int atomic64_add_negative(long long i, atomic64_t *v) * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as it was not @u. - * Returns non-zero if @v was not @u, and zero otherwise. + * Returns the old value of @v. */ static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u) { diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h index 49fd1ea22951..017594d403f6 100644 --- a/arch/x86/include/asm/atomic64_64.h +++ b/arch/x86/include/asm/atomic64_64.h @@ -202,7 +202,7 @@ static inline long atomic64_xchg(atomic64_t *v, long new) * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as it was not @u. - * Returns non-zero if @v was not @u, and zero otherwise. + * Returns the old value of @v. */ static inline int atomic64_add_unless(atomic64_t *v, long a, long u) { -- cgit v1.2.2 From 7847777a45f9f8bfc8617dbf107bde1ecb59caee Mon Sep 17 00:00:00 2001 From: Arun Sharma <asharma@fb.com> Date: Tue, 26 Jul 2011 16:09:08 -0700 Subject: atomic: cleanup asm-generic atomic*.h inclusion After changing all consumers of atomics to include <linux/atomic.h>, we ran into some compile time errors due to this dependency chain: linux/atomic.h -> asm/atomic.h -> asm-generic/atomic-long.h where atomic-long.h could use funcs defined later in linux/atomic.h without a prototype. This patches moves the code that includes asm-generic/atomic*.h to linux/atomic.h. Archs that need <asm-generic/atomic64.h> need to select CONFIG_GENERIC_ATOMIC64 from now on (some of them used to include it unconditionally). Compile tested on i386 and x86_64 with allnoconfig. Signed-off-by: Arun Sharma <asharma@fb.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- arch/x86/include/asm/atomic.h | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 5fe9cb335cd2..10572e309ab2 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -318,5 +318,4 @@ static inline void atomic_or_long(unsigned long *v1, unsigned long v2) # include "atomic64_64.h" #endif -#include <asm-generic/atomic-long.h> #endif /* _ASM_X86_ATOMIC_H */ -- cgit v1.2.2