Re: HELP:(VIPER BOARD)AC'97 controller driver for rtlinux(rtlinux core driver)
Hi, > > I am trying to develop a codec driver (rtlinux > driver) from scratch. In Viper board (PXA255) > physical memory range 0x4000-0x43FF is used > by the PXA255 peripherals.In that address range > 0x4050-0x405005FC is needed for AC'97 controller > registers. Is this memory range is already mapped to > virtual address space, else How to map this to > virtual address space. > You have to map this address range using "ioremap()". Data at address returned by ioremap can be accessed by calling readl(), writel() et al > > When i tried ioremap() it is giving same virtual > address with different physical address(i tried > ioremap with another driver(same board)with different > physical memory address) > Same virtual address can point to different physical addresses depending upon how it is mapped. Nitin - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
HELP:(VIPER BOARD)AC'97 controller driver for rtlinux(rtlinux core driver)
Dear friends, I am trying to develop a codec driver (rtlinux driver) from scratch. In Viper board (PXA255) physical memory range 0x4000-0x43FF is used by the PXA255 peripherals.In that address range 0x4050-0x405005FC is needed for AC'97 controller registers. Is this memory range is already mapped to virtual address space, else How to map this to virtual address space. When i tried ioremap() it is giving same virtual address with different physical address(i tried ioremap with another driver(same board)with different physical memory address) Or if this driver already available for RTLinux Please sent me. Nobin Mathew __ Do you Yahoo!? Yahoo! Personals - Better first dates. More second dates. http://personals.yahoo.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
HELP:(VIPER BOARD)AC'97 controller driver for rtlinux(rtlinux core driver)
Dear friends, I am trying to develop a codec driver (rtlinux driver) from scratch. In Viper board (PXA255) physical memory range 0x4000-0x43FF is used by the PXA255 peripherals.In that address range 0x4050-0x405005FC is needed for AC'97 controller registers. Is this memory range is already mapped to virtual address space, else How to map this to virtual address space. When i tried ioremap() it is giving same virtual address with different physical address(i tried ioremap with another driver(same board)with different physical memory address) Or if this driver already available for RTLinux Please sent me. Nobin Mathew __ Do you Yahoo!? Yahoo! Personals - Better first dates. More second dates. http://personals.yahoo.com - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: HELP:(VIPER BOARD)AC'97 controller driver for rtlinux(rtlinux core driver)
Hi, I am trying to develop a codec driver (rtlinux driver) from scratch. In Viper board (PXA255) physical memory range 0x4000-0x43FF is used by the PXA255 peripherals.In that address range 0x4050-0x405005FC is needed for AC'97 controller registers. Is this memory range is already mapped to virtual address space, else How to map this to virtual address space. You have to map this address range using ioremap(). Data at address returned by ioremap can be accessed by calling readl(), writel() et al When i tried ioremap() it is giving same virtual address with different physical address(i tried ioremap with another driver(same board)with different physical memory address) Same virtual address can point to different physical addresses depending upon how it is mapped. Nitin - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
