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/*
* Copyright 2000 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or 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/sched.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <asm/cpu.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/mipsregs.h>
#include <asm/reboot.h>
#include <asm/pgtable.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-pb1x00/pb1000.h>
void board_reset (void)
{
}
void __init board_setup(void)
{
u32 pin_func, static_cfg0;
u32 sys_freqctrl, sys_clksrc;
u32 prid = read_c0_prid();
// set AUX clock to 12MHz * 8 = 96 MHz
au_writel(8, SYS_AUXPLL);
au_writel(0, SYS_PINSTATERD);
udelay(100);
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
/* zero and disable FREQ2 */
sys_freqctrl = au_readl(SYS_FREQCTRL0);
sys_freqctrl &= ~0xFFF00000;
au_writel(sys_freqctrl, SYS_FREQCTRL0);
/* zero and disable USBH/USBD clocks */
sys_clksrc = au_readl(SYS_CLKSRC);
sys_clksrc &= ~0x00007FE0;
au_writel(sys_clksrc, SYS_CLKSRC);
sys_freqctrl = au_readl(SYS_FREQCTRL0);
sys_freqctrl &= ~0xFFF00000;
sys_clksrc = au_readl(SYS_CLKSRC);
sys_clksrc &= ~0x00007FE0;
switch (prid & 0x000000FF)
{
case 0x00: /* DA */
case 0x01: /* HA */
case 0x02: /* HB */
/* CPU core freq to 48MHz to slow it way down... */
au_writel(4, SYS_CPUPLL);
/*
* Setup 48MHz FREQ2 from CPUPLL for USB Host
*/
/* FRDIV2=3 -> div by 8 of 384MHz -> 48MHz */
sys_freqctrl |= ((3<<22) | (1<<21) | (0<<20));
au_writel(sys_freqctrl, SYS_FREQCTRL0);
/* CPU core freq to 384MHz */
au_writel(0x20, SYS_CPUPLL);
printk("Au1000: 48MHz OHCI workaround enabled\n");
break;
default: /* HC and newer */
// FREQ2 = aux/2 = 48 MHz
sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20));
au_writel(sys_freqctrl, SYS_FREQCTRL0);
break;
}
/*
* Route 48MHz FREQ2 into USB Host and/or Device
*/
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
sys_clksrc |= ((4<<12) | (0<<11) | (0<<10));
#endif
au_writel(sys_clksrc, SYS_CLKSRC);
// configure pins GPIO[14:9] as GPIO
pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8080);
// 2nd USB port is USB host
pin_func |= 0x8000;
au_writel(pin_func, SYS_PINFUNC);
au_writel(0x2800, SYS_TRIOUTCLR);
au_writel(0x0030, SYS_OUTPUTCLR);
#endif /* defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) */
// make gpio 15 an input (for interrupt line)
pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x100);
// we don't need I2S, so make it available for GPIO[31:29]
pin_func |= (1<<5);
au_writel(pin_func, SYS_PINFUNC);
au_writel(0x8000, SYS_TRIOUTCLR);
static_cfg0 = au_readl(MEM_STCFG0) & (u32)(~0xc00);
au_writel(static_cfg0, MEM_STCFG0);
// configure RCE2* for LCD
au_writel(0x00000004, MEM_STCFG2);
// MEM_STTIME2
au_writel(0x09000000, MEM_STTIME2);
// Set 32-bit base address decoding for RCE2*
au_writel(0x10003ff0, MEM_STADDR2);
// PCI CPLD setup
// expand CE0 to cover PCI
au_writel(0x11803e40, MEM_STADDR1);
// burst visibility on
au_writel(au_readl(MEM_STCFG0) | 0x1000, MEM_STCFG0);
au_writel(0x83, MEM_STCFG1); // ewait enabled, flash timing
au_writel(0x33030a10, MEM_STTIME1); // slower timing for FPGA
/* 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 */
#ifdef CONFIG_PCI
au_writel(0, PCI_BRIDGE_CONFIG); // set extend byte to 0
au_writel(0, SDRAM_MBAR); // set mbar to 0
au_writel(0x2, SDRAM_CMD); // enable memory accesses
au_sync_delay(1);
#endif
/* Enable Au1000 BCLK switching - note: sed1356 must not use
* its BCLK (Au1000 LCLK) for any timings */
switch (prid & 0x000000FF)
{
case 0x00: /* DA */
case 0x01: /* HA */
case 0x02: /* HB */
break;
default: /* HC and newer */
/* Enable sys bus clock divider when IDLE state or no bus
activity. */
au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL);
break;
}
}
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