diff options
Diffstat (limited to 'arch/mips/alchemy/pb1100/board_setup.c')
| -rw-r--r-- | arch/mips/alchemy/pb1100/board_setup.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/mips/alchemy/pb1100/board_setup.c b/arch/mips/alchemy/pb1100/board_setup.c new file mode 100644 index 000000000000..c0bfd59a7a36 --- /dev/null +++ b/arch/mips/alchemy/pb1100/board_setup.c @@ -0,0 +1,109 @@ +/* + * Copyright 2002, 2008 MontaVista Software Inc. + * Author: MontaVista Software, Inc. <source@mvista.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/init.h> +#include <linux/delay.h> + +#include <asm/mach-au1x00/au1000.h> +#include <asm/mach-pb1x00/pb1100.h> + +void board_reset(void) +{ + /* Hit BCSR.RST_VDDI[SOFT_RESET] */ + au_writel(0x00000000, PB1100_RST_VDDI); +} + +void __init board_setup(void) +{ + volatile void __iomem *base = (volatile void __iomem *)0xac000000UL; + + /* Set AUX clock to 12 MHz * 8 = 96 MHz */ + au_writel(8, SYS_AUXPLL); + au_writel(0, SYS_PININPUTEN); + udelay(100); + +#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) + { + u32 pin_func, sys_freqctrl, sys_clksrc; + + /* Configure pins GPIO[14:9] as GPIO */ + pin_func = au_readl(SYS_PINFUNC) & ~SYS_PF_UR3; + + /* Zero and disable FREQ2 */ + sys_freqctrl = au_readl(SYS_FREQCTRL0); + sys_freqctrl &= ~0xFFF00000; + au_writel(sys_freqctrl, SYS_FREQCTRL0); + + /* Zero and disable USBH/USBD/IrDA clock */ + sys_clksrc = au_readl(SYS_CLKSRC); + sys_clksrc &= ~(SYS_CS_CIR | SYS_CS_DIR | SYS_CS_MIR_MASK); + au_writel(sys_clksrc, SYS_CLKSRC); + + sys_freqctrl = au_readl(SYS_FREQCTRL0); + sys_freqctrl &= ~0xFFF00000; + + sys_clksrc = au_readl(SYS_CLKSRC); + sys_clksrc &= ~(SYS_CS_CIR | SYS_CS_DIR | SYS_CS_MIR_MASK); + + /* FREQ2 = aux / 2 = 48 MHz */ + sys_freqctrl |= (0 << SYS_FC_FRDIV2_BIT) | + SYS_FC_FE2 | SYS_FC_FS2; + au_writel(sys_freqctrl, SYS_FREQCTRL0); + + /* + * Route 48 MHz FREQ2 into USBH/USBD/IrDA + */ + sys_clksrc |= SYS_CS_MUX_FQ2 << SYS_CS_MIR_BIT; + au_writel(sys_clksrc, SYS_CLKSRC); + + /* Setup the static bus controller */ + au_writel(0x00000002, MEM_STCFG3); /* type = PCMCIA */ + au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */ + au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */ + + /* + * Get USB Functionality pin state (device vs host drive pins). + */ + pin_func = au_readl(SYS_PINFUNC) & ~SYS_PF_USB; + /* 2nd USB port is USB host. */ + pin_func |= SYS_PF_USB; + au_writel(pin_func, SYS_PINFUNC); + } +#endif /* defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) */ + + /* Enable sys bus clock divider when IDLE state or no bus activity. */ + au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL); + + /* Enable the RTC if not already enabled. */ + if (!(readb(base + 0x28) & 0x20)) { + writeb(readb(base + 0x28) | 0x20, base + 0x28); + au_sync(); + } + /* Put the clock in BCD mode. */ + if (readb(base + 0x2C) & 0x4) { /* reg B */ + writeb(readb(base + 0x2c) & ~0x4, base + 0x2c); + au_sync(); + } +} |