diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c index d396dcc11be5..5790ee46a38d 100644 --- a/drivers/media/rc/nuvoton-cir.c +++ b/drivers/media/rc/nuvoton-cir.c @@ -161,6 +161,22 @@ static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset) return val; } +/* don't override io address if one is set already */ +static void nvt_set_ioaddr(struct nvt_dev *nvt, unsigned long *ioaddr) +{ + unsigned long old_addr; + + old_addr = nvt_cr_read(nvt, CR_CIR_BASE_ADDR_HI) << 8; + old_addr |= nvt_cr_read(nvt, CR_CIR_BASE_ADDR_LO); + + if (old_addr) + *ioaddr = old_addr; + else { + nvt_cr_write(nvt, *ioaddr >> 8, CR_CIR_BASE_ADDR_HI); + nvt_cr_write(nvt, *ioaddr & 0xff, CR_CIR_BASE_ADDR_LO); + } +} + /* dump current cir register contents */ static void cir_dump_regs(struct nvt_dev *nvt) { @@ -332,8 +348,7 @@ static void nvt_cir_ldev_init(struct nvt_dev *nvt) /* Select CIR logical device */ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR); - nvt_cr_write(nvt, nvt->cir_addr >> 8, CR_CIR_BASE_ADDR_HI); - nvt_cr_write(nvt, nvt->cir_addr & 0xff, CR_CIR_BASE_ADDR_LO); + nvt_set_ioaddr(nvt, &nvt->cir_addr); nvt_cr_write(nvt, nvt->cir_irq, CR_CIR_IRQ_RSRC); @@ -356,8 +371,7 @@ static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt) /* Select CIR Wake logical device */ nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); - nvt_cr_write(nvt, nvt->cir_wake_addr >> 8, CR_CIR_BASE_ADDR_HI); - nvt_cr_write(nvt, nvt->cir_wake_addr & 0xff, CR_CIR_BASE_ADDR_LO); + nvt_set_ioaddr(nvt, &nvt->cir_wake_addr); nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC); |