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linux/arch/mips/momentum/ocelot_3/setup.c
Atsushi Nemoto 53c2df2f4e Use rtc_lock to protect RTC operations 
Many RTC routines were not protected against each other, so there are
potential races, for example, ntp-update against /dev/rtc.  This patch
fixes them using rtc_lock.
    
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07 18:05:38 +00:00

401 lines
11 KiB
C
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/*
* setup.c
*
* BRIEF MODULE DESCRIPTION
* Momentum Computer Ocelot-3 board dependent boot routines
*
* Copyright (C) 1996, 1997, 01, 05 Ralf Baechle
* Copyright (C) 2000 RidgeRun, Inc.
* Copyright (C) 2001 Red Hat, Inc.
* Copyright (C) 2002 Momentum Computer
*
* Author: Matthew Dharm, Momentum Computer
* mdharm@momenco.com
*
* Louis Hamilton, Red Hat, Inc.
* hamilton@redhat.com [MIPS64 modifications]
*
* Author: RidgeRun, Inc.
* glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
*
* Copyright 2001 MontaVista Software Inc.
* Author: jsun@mvista.com or jsun@junsun.net
*
* Copyright 2004 PMC-Sierra
* Author: Manish Lachwani (lachwani@pmc-sierra.com)
*
* Copyright (C) 2004 MontaVista Software Inc.
* Author: Manish Lachwani, mlachwani@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/kernel.h>
#include <linux/types.h>
#include <linux/mc146818rtc.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/timex.h>
#include <linux/bootmem.h>
#include <linux/mv643xx.h>
#include <asm/time.h>
#include <asm/page.h>
#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pci.h>
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/reboot.h>
#include <asm/mc146818rtc.h>
#include <asm/tlbflush.h>
#include "ocelot_3_fpga.h"
/* Marvell Discovery Register Base */
unsigned long marvell_base = (signed)0xf4000000;
/* CPU clock */
unsigned long cpu_clock;
/* RTC/NVRAM */
unsigned char* rtc_base = (unsigned char*)(signed)0xfc800000;
/* FPGA Base */
unsigned long ocelot_fpga_base = (signed)0xfc000000;
/* Serial base */
unsigned long uart_base = (signed)0xfd000000;
/*
* Marvell Discovery SRAM. This is one place where Ethernet
* Tx and Rx descriptors can be placed to improve performance
*/
extern unsigned long mv64340_sram_base;
/* These functions are used for rebooting or halting the machine*/
extern void momenco_ocelot_restart(char *command);
extern void momenco_ocelot_halt(void);
extern void momenco_ocelot_power_off(void);
void momenco_time_init(void);
static char reset_reason;
void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
unsigned long entryhi, unsigned long pagemask);
static inline unsigned long ENTRYLO(unsigned long paddr)
{
return ((paddr & PAGE_MASK) |
(_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL |
_CACHE_UNCACHED)) >> 6;
}
void __init bus_error_init(void)
{
/* nothing */
}
/*
* setup code for a handoff from a version 2 PMON 2000 PROM
*/
void setup_wired_tlb_entries(void)
{
write_c0_wired(0);
local_flush_tlb_all();
/* marvell and extra space */
add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), (signed)0xf4000000, PM_64K);
/* fpga, rtc, and uart */
add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), (signed)0xfc000000, PM_16M);
}
#define CONV_BCD_TO_BIN(val) (((val) & 0xf) + (((val) >> 4) * 10))
#define CONV_BIN_TO_BCD(val) (((val) % 10) + (((val) / 10) << 4))
unsigned long m48t37y_get_time(void)
{
unsigned int year, month, day, hour, min, sec;
unsigned long flags;
spin_lock_irqsave(&rtc_lock, flags);
/* stop the update */
rtc_base[0x7ff8] = 0x40;
year = CONV_BCD_TO_BIN(rtc_base[0x7fff]);
year += CONV_BCD_TO_BIN(rtc_base[0x7ff1]) * 100;
month = CONV_BCD_TO_BIN(rtc_base[0x7ffe]);
day = CONV_BCD_TO_BIN(rtc_base[0x7ffd]);
hour = CONV_BCD_TO_BIN(rtc_base[0x7ffb]);
min = CONV_BCD_TO_BIN(rtc_base[0x7ffa]);
sec = CONV_BCD_TO_BIN(rtc_base[0x7ff9]);
/* start the update */
rtc_base[0x7ff8] = 0x00;
spin_unlock_irqrestore(&rtc_lock, flags);
return mktime(year, month, day, hour, min, sec);
}
int m48t37y_set_time(unsigned long sec)
{
struct rtc_time tm;
unsigned long flags;
/* convert to a more useful format -- note months count from 0 */
to_tm(sec, &tm);
tm.tm_mon += 1;
spin_lock_irqsave(&rtc_lock, flags);
/* enable writing */
rtc_base[0x7ff8] = 0x80;
/* year */
rtc_base[0x7fff] = CONV_BIN_TO_BCD(tm.tm_year % 100);
rtc_base[0x7ff1] = CONV_BIN_TO_BCD(tm.tm_year / 100);
/* month */
rtc_base[0x7ffe] = CONV_BIN_TO_BCD(tm.tm_mon);
/* day */
rtc_base[0x7ffd] = CONV_BIN_TO_BCD(tm.tm_mday);
/* hour/min/sec */
rtc_base[0x7ffb] = CONV_BIN_TO_BCD(tm.tm_hour);
rtc_base[0x7ffa] = CONV_BIN_TO_BCD(tm.tm_min);
rtc_base[0x7ff9] = CONV_BIN_TO_BCD(tm.tm_sec);
/* day of week -- not really used, but let's keep it up-to-date */
rtc_base[0x7ffc] = CONV_BIN_TO_BCD(tm.tm_wday + 1);
/* disable writing */
rtc_base[0x7ff8] = 0x00;
spin_unlock_irqrestore(&rtc_lock, flags);
return 0;
}
void momenco_timer_setup(struct irqaction *irq)
{
setup_irq(7, irq); /* Timer interrupt, unmask status IM7 */
}
void momenco_time_init(void)
{
setup_wired_tlb_entries();
/*
* Ocelot-3 board has been built with both
* the Rm7900 and the Rm7065C
*/
mips_hpt_frequency = cpu_clock / 2;
board_timer_setup = momenco_timer_setup;
rtc_get_time = m48t37y_get_time;
rtc_set_time = m48t37y_set_time;
}
/*
* PCI Support for Ocelot-3
*/
/* Bus #0 IO and MEM space */
#define OCELOT_3_PCI_IO_0_START 0xe0000000
#define OCELOT_3_PCI_IO_0_SIZE 0x08000000
#define OCELOT_3_PCI_MEM_0_START 0xc0000000
#define OCELOT_3_PCI_MEM_0_SIZE 0x10000000
/* Bus #1 IO and MEM space */
#define OCELOT_3_PCI_IO_1_START 0xe8000000
#define OCELOT_3_PCI_IO_1_SIZE 0x08000000
#define OCELOT_3_PCI_MEM_1_START 0xd0000000
#define OCELOT_3_PCI_MEM_1_SIZE 0x10000000
static struct resource mv_pci_io_mem0_resource = {
.name = "MV64340 PCI0 IO MEM",
.start = OCELOT_3_PCI_IO_0_START,
.end = OCELOT_3_PCI_IO_0_START + OCELOT_3_PCI_IO_0_SIZE - 1,
.flags = IORESOURCE_IO,
};
static struct resource mv_pci_io_mem1_resource = {
.name = "MV64340 PCI1 IO MEM",
.start = OCELOT_3_PCI_IO_1_START,
.end = OCELOT_3_PCI_IO_1_START + OCELOT_3_PCI_IO_1_SIZE - 1,
.flags = IORESOURCE_IO,
};
static struct resource mv_pci_mem0_resource = {
.name = "MV64340 PCI0 MEM",
.start = OCELOT_3_PCI_MEM_0_START,
.end = OCELOT_3_PCI_MEM_0_START + OCELOT_3_PCI_MEM_0_SIZE - 1,
.flags = IORESOURCE_MEM,
};
static struct resource mv_pci_mem1_resource = {
.name = "MV64340 PCI1 MEM",
.start = OCELOT_3_PCI_MEM_1_START,
.end = OCELOT_3_PCI_MEM_1_START + OCELOT_3_PCI_MEM_1_SIZE - 1,
.flags = IORESOURCE_MEM,
};
static struct mv_pci_controller mv_bus0_controller = {
.pcic = {
.pci_ops = &mv_pci_ops,
.mem_resource = &mv_pci_mem0_resource,
.io_resource = &mv_pci_io_mem0_resource,
},
.config_addr = MV64340_PCI_0_CONFIG_ADDR,
.config_vreg = MV64340_PCI_0_CONFIG_DATA_VIRTUAL_REG,
};
static struct mv_pci_controller mv_bus1_controller = {
.pcic = {
.pci_ops = &mv_pci_ops,
.mem_resource = &mv_pci_mem1_resource,
.io_resource = &mv_pci_io_mem1_resource,
},
.config_addr = MV64340_PCI_1_CONFIG_ADDR,
.config_vreg = MV64340_PCI_1_CONFIG_DATA_VIRTUAL_REG,
};
static __init int __init ja_pci_init(void)
{
uint32_t enable;
extern int pci_probe_only;
/* PMON will assign PCI resources */
pci_probe_only = 1;
enable = ~MV_READ(MV64340_BASE_ADDR_ENABLE);
/*
* We require at least one enabled I/O or PCI memory window or we
* will ignore this PCI bus. We ignore PCI windows 1, 2 and 3.
*/
if (enable & (0x01 << 9) || enable & (0x01 << 10))
register_pci_controller(&mv_bus0_controller.pcic);
if (enable & (0x01 << 14) || enable & (0x01 << 15))
register_pci_controller(&mv_bus1_controller.pcic);
ioport_resource.end = OCELOT_3_PCI_IO_0_START + OCELOT_3_PCI_IO_0_SIZE +
OCELOT_3_PCI_IO_1_SIZE - 1;
iomem_resource.end = OCELOT_3_PCI_MEM_0_START + OCELOT_3_PCI_MEM_0_SIZE +
OCELOT_3_PCI_MEM_1_SIZE - 1;
set_io_port_base(OCELOT_3_PCI_IO_0_START); /* mips_io_port_base */
return 0;
}
arch_initcall(ja_pci_init);
void __init plat_setup(void)
{
unsigned int tmpword;
board_time_init = momenco_time_init;
_machine_restart = momenco_ocelot_restart;
_machine_halt = momenco_ocelot_halt;
_machine_power_off = momenco_ocelot_power_off;
/* Wired TLB entries */
setup_wired_tlb_entries();
/* shut down ethernet ports, just to be sure our memory doesn't get
* corrupted by random ethernet traffic.
*/
MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8);
MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8);
MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8);
MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8);
do {}
while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff);
do {}
while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff);
do {}
while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff);
do {}
while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff);
MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0),
MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1);
MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1),
MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1);
/* Turn off the Bit-Error LED */
OCELOT_FPGA_WRITE(0x80, CLR);
tmpword = OCELOT_FPGA_READ(BOARDREV);
if (tmpword < 26)
printk("Momenco Ocelot-3: Board Assembly Rev. %c\n",
'A'+tmpword);
else
printk("Momenco Ocelot-3: Board Assembly Revision #0x%x\n",
tmpword);
tmpword = OCELOT_FPGA_READ(FPGA_REV);
printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15);
tmpword = OCELOT_FPGA_READ(RESET_STATUS);
printk("Reset reason: 0x%x\n", tmpword);
switch (tmpword) {
case 0x1:
printk(" - Power-up reset\n");
break;
case 0x2:
printk(" - Push-button reset\n");
break;
case 0x4:
printk(" - cPCI bus reset\n");
break;
case 0x8:
printk(" - Watchdog reset\n");
break;
case 0x10:
printk(" - Software reset\n");
break;
default:
printk(" - Unknown reset cause\n");
}
reset_reason = tmpword;
OCELOT_FPGA_WRITE(0xff, RESET_STATUS);
tmpword = OCELOT_FPGA_READ(CPCI_ID);
printk("cPCI ID register: 0x%02x\n", tmpword);
printk(" - Slot number: %d\n", tmpword & 0x1f);
printk(" - PCI bus present: %s\n", tmpword & 0x40 ? "yes" : "no");
printk(" - System Slot: %s\n", tmpword & 0x20 ? "yes" : "no");
tmpword = OCELOT_FPGA_READ(BOARD_STATUS);
printk("Board Status register: 0x%02x\n", tmpword);
printk(" - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
printk(" - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
printk(" - L3 cache size: %d MB\n", (1<<((tmpword&12) >> 2))&~1);
/* Support for 128 MB memory */
add_memory_region(0x0, 0x08000000, BOOT_MEM_RAM);
}
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