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cs5535: add a generic MFGPT driver

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This is based on the old code on arch/x86/kernel/mfgpt_32.c, except it's
not x86 specific, it's modular, and it makes use of a PCI BAR rather than
a random MSR.  Currently module unloading is not supported; it's uncertain
whether or not it can be made work with the hardware.

[akpm@linux-foundation.org: add X86 dependency]
Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Cc: Jordan Crouse <jordan@cosmicpenguin.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Chris Ball <cjb@laptop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andres Salomon
2009-12-14 18:00:37 -08:00
committed by Linus Torvalds
parent 3c55494670
commit 82dca611bb
5 changed files with 462 additions and 40 deletions
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67
include/linux/cs5535.h
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@ -18,6 +18,16 @@
#define MSR_LBAR_ACPI 0x5140000E
#define MSR_LBAR_PMS 0x5140000F
#define MSR_PIC_YSEL_LOW 0x51400020
#define MSR_PIC_YSEL_HIGH 0x51400021
#define MSR_PIC_ZSEL_LOW 0x51400022
#define MSR_PIC_ZSEL_HIGH 0x51400023
#define MSR_PIC_IRQM_LPC 0x51400025
#define MSR_MFGPT_IRQ 0x51400028
#define MSR_MFGPT_NR 0x51400029
#define MSR_MFGPT_SETUP 0x5140002B
/* resource sizes */
#define LBAR_GPIO_SIZE 0xFF
#define LBAR_MFGPT_SIZE 0x40
@ -55,4 +65,61 @@ void cs5535_gpio_set(unsigned offset, unsigned int reg);
void cs5535_gpio_clear(unsigned offset, unsigned int reg);
int cs5535_gpio_isset(unsigned offset, unsigned int reg);
/* MFGPTs */
#define MFGPT_MAX_TIMERS 8
#define MFGPT_TIMER_ANY (-1)
#define MFGPT_DOMAIN_WORKING 1
#define MFGPT_DOMAIN_STANDBY 2
#define MFGPT_DOMAIN_ANY (MFGPT_DOMAIN_WORKING | MFGPT_DOMAIN_STANDBY)
#define MFGPT_CMP1 0
#define MFGPT_CMP2 1
#define MFGPT_EVENT_IRQ 0
#define MFGPT_EVENT_NMI 1
#define MFGPT_EVENT_RESET 3
#define MFGPT_REG_CMP1 0
#define MFGPT_REG_CMP2 2
#define MFGPT_REG_COUNTER 4
#define MFGPT_REG_SETUP 6
#define MFGPT_SETUP_CNTEN (1 << 15)
#define MFGPT_SETUP_CMP2 (1 << 14)
#define MFGPT_SETUP_CMP1 (1 << 13)
#define MFGPT_SETUP_SETUP (1 << 12)
#define MFGPT_SETUP_STOPEN (1 << 11)
#define MFGPT_SETUP_EXTEN (1 << 10)
#define MFGPT_SETUP_REVEN (1 << 5)
#define MFGPT_SETUP_CLKSEL (1 << 4)
struct cs5535_mfgpt_timer;
extern uint16_t cs5535_mfgpt_read(struct cs5535_mfgpt_timer *timer,
uint16_t reg);
extern void cs5535_mfgpt_write(struct cs5535_mfgpt_timer *timer, uint16_t reg,
uint16_t value);
extern int cs5535_mfgpt_toggle_event(struct cs5535_mfgpt_timer *timer, int cmp,
int event, int enable);
extern int cs5535_mfgpt_set_irq(struct cs5535_mfgpt_timer *timer, int cmp,
int *irq, int enable);
extern struct cs5535_mfgpt_timer *cs5535_mfgpt_alloc_timer(int timer,
int domain);
extern void cs5535_mfgpt_free_timer(struct cs5535_mfgpt_timer *timer);
static inline int cs5535_mfgpt_setup_irq(struct cs5535_mfgpt_timer *timer,
int cmp, int *irq)
{
return cs5535_mfgpt_set_irq(timer, cmp, irq, 1);
}
static inline int cs5535_mfgpt_release_irq(struct cs5535_mfgpt_timer *timer,
int cmp, int *irq)
{
return cs5535_mfgpt_set_irq(timer, cmp, irq, 0);
}
#endif