diff options
| author | Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | 2009-03-24 04:07:26 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2009-03-24 04:07:26 +0300 |
| commit | c75ee7520b4ad48a6948f51ca43b2e46ebd3696a (patch) | |
| tree | b3807d91e6bb892db8f35c4e18fd78293926df88 | |
| parent | da8cfe03a461fe759041e7f130f96913b262aa6b (diff) | |
| download | linux-c75ee7520b4ad48a6948f51ca43b2e46ebd3696a.tar.xz | |
omap mailbox: add save_/restore_ctx() for PM
To preserve the registers during off-mode
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
| -rw-r--r-- | arch/arm/mach-omap2/mailbox.c | 32 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/mach/mailbox.h | 23 |
2 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/mailbox.c b/arch/arm/mach-omap2/mailbox.c index 0b8476ba95fd..fd5b8a5925cc 100644 --- a/arch/arm/mach-omap2/mailbox.c +++ b/arch/arm/mach-omap2/mailbox.c @@ -30,6 +30,9 @@ #define MAILBOX_IRQ_NEWMSG(u) (1 << (2 * (u))) #define MAILBOX_IRQ_NOTFULL(u) (1 << (2 * (u) + 1)) +#define MBOX_REG_SIZE 0x120 +#define MBOX_NR_REGS (MBOX_REG_SIZE / sizeof(u32)) + static void __iomem *mbox_base; struct omap_mbox2_fifo { @@ -45,6 +48,7 @@ struct omap_mbox2_priv { unsigned long irqstatus; u32 newmsg_bit; u32 notfull_bit; + u32 ctx[MBOX_NR_REGS]; }; static struct clk *mbox_ick_handle; @@ -165,6 +169,32 @@ static int omap2_mbox_is_irq(struct omap_mbox *mbox, return (enable & status & bit); } +static void omap2_mbox_save_ctx(struct omap_mbox *mbox) +{ + int i; + struct omap_mbox2_priv *p = mbox->priv; + + for (i = 0; i < MBOX_NR_REGS; i++) { + p->ctx[i] = mbox_read_reg(i * sizeof(u32)); + + dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__, + i, p->ctx[i]); + } +} + +static void omap2_mbox_restore_ctx(struct omap_mbox *mbox) +{ + int i; + struct omap_mbox2_priv *p = mbox->priv; + + for (i = 0; i < MBOX_NR_REGS; i++) { + mbox_write_reg(p->ctx[i], i * sizeof(u32)); + + dev_dbg(mbox->dev, "%s: [%02x] %08x\n", __func__, + i, p->ctx[i]); + } +} + static struct omap_mbox_ops omap2_mbox_ops = { .type = OMAP_MBOX_TYPE2, .startup = omap2_mbox_startup, @@ -177,6 +207,8 @@ static struct omap_mbox_ops omap2_mbox_ops = { .disable_irq = omap2_mbox_disable_irq, .ack_irq = omap2_mbox_ack_irq, .is_irq = omap2_mbox_is_irq, + .save_ctx = omap2_mbox_save_ctx, + .restore_ctx = omap2_mbox_restore_ctx, }; /* diff --git a/arch/arm/plat-omap/include/mach/mailbox.h b/arch/arm/plat-omap/include/mach/mailbox.h index 577db6852f43..b7a6991814ec 100644 --- a/arch/arm/plat-omap/include/mach/mailbox.h +++ b/arch/arm/plat-omap/include/mach/mailbox.h @@ -33,6 +33,9 @@ struct omap_mbox_ops { void (*disable_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); void (*ack_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); int (*is_irq)(struct omap_mbox *mbox, omap_mbox_irq_t irq); + /* ctx */ + void (*save_ctx)(struct omap_mbox *mbox); + void (*restore_ctx)(struct omap_mbox *mbox); }; struct omap_mbox_queue { @@ -70,4 +73,24 @@ void omap_mbox_put(struct omap_mbox *); int omap_mbox_register(struct device *parent, struct omap_mbox *); int omap_mbox_unregister(struct omap_mbox *); +static inline void omap_mbox_save_ctx(struct omap_mbox *mbox) +{ + if (!mbox->ops->save_ctx) { + dev_err(mbox->dev, "%s:\tno save\n", __func__); + return; + } + + mbox->ops->save_ctx(mbox); +} + +static inline void omap_mbox_restore_ctx(struct omap_mbox *mbox) +{ + if (!mbox->ops->restore_ctx) { + dev_err(mbox->dev, "%s:\tno restore\n", __func__); + return; + } + + mbox->ops->restore_ctx(mbox); +} + #endif /* MAILBOX_H */ |