diff options
| author | Manuel Lauss <manuel.lauss@gmail.com> | 2014-04-10 20:57:59 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-05-28 09:04:48 (GMT) |
| commit | 739cec8f187f1ea920b8821ef4ae733bc097085c (patch) | |
| tree | a5a5b3e1584909b34a36f98fd6daf6dd76426c9a /arch/mips/alchemy/common | |
| parent | d19648d7f3b047bac9922fe097f62afbb48fee62 (diff) | |
| download | linux-739cec8f187f1ea920b8821ef4ae733bc097085c.tar.xz | |
MIPS: Alchemy: Default to noncoherent IO on Au1200 AB
CONFIG_DMA_COHERENT is no longer set; default to noncoherent io on
Au1200 revision AB to make USB work.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/6745/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/alchemy/common')
| -rw-r--r-- | arch/mips/alchemy/common/setup.c | 6 | ||||
| -rw-r--r-- | arch/mips/alchemy/common/usb.c | 26 |
2 files changed, 8 insertions, 24 deletions
diff --git a/arch/mips/alchemy/common/setup.c b/arch/mips/alchemy/common/setup.c index 566a1743..8267e3c 100644 --- a/arch/mips/alchemy/common/setup.c +++ b/arch/mips/alchemy/common/setup.c @@ -67,6 +67,12 @@ void __init plat_mem_setup(void) case ALCHEMY_CPU_AU1500: case ALCHEMY_CPU_AU1100: coherentio = 0; + break; + case ALCHEMY_CPU_AU1200: + /* Au1200 AB USB does not support coherent memory */ + if (0 == (read_c0_prid() & PRID_REV_MASK)) + coherentio = 0; + break; } board_setup(); /* board specific setup */ diff --git a/arch/mips/alchemy/common/usb.c b/arch/mips/alchemy/common/usb.c index 2adc7ed..d193dbe 100644 --- a/arch/mips/alchemy/common/usb.c +++ b/arch/mips/alchemy/common/usb.c @@ -355,47 +355,25 @@ static inline void __au1200_udc_control(void __iomem *base, int enable) } } -static inline int au1200_coherency_bug(void) -{ -#if defined(CONFIG_DMA_COHERENT) - /* Au1200 AB USB does not support coherent memory */ - if (!(read_c0_prid() & PRID_REV_MASK)) { - printk(KERN_INFO "Au1200 USB: this is chip revision AB !!\n"); - printk(KERN_INFO "Au1200 USB: update your board or re-configure" - " the kernel\n"); - return -ENODEV; - } -#endif - return 0; -} - static inline int au1200_usb_control(int block, int enable) { void __iomem *base = (void __iomem *)KSEG1ADDR(AU1200_USB_CTL_PHYS_ADDR); - int ret = 0; switch (block) { case ALCHEMY_USB_OHCI0: - ret = au1200_coherency_bug(); - if (ret && enable) - goto out; __au1200_ohci_control(base, enable); break; case ALCHEMY_USB_UDC0: __au1200_udc_control(base, enable); break; case ALCHEMY_USB_EHCI0: - ret = au1200_coherency_bug(); - if (ret && enable) - goto out; __au1200_ehci_control(base, enable); break; default: - ret = -ENODEV; + return -ENODEV; } -out: - return ret; + return 0; } |