306 lines
8.9 KiB
C
306 lines
8.9 KiB
C
/*
|
|
* Copyright (C) 2004, 2005 by Basler Vision Technologies AG
|
|
* Author: Thomas Koeller <thomas.koeller@baslerweb.com>
|
|
* Based on the PMC-Sierra Yosemite board support by Ralf Baechle and
|
|
* Manish Lachwani.
|
|
*
|
|
* 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 program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/serial_core.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/spinlock.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/pgtable-32.h>
|
|
#include <asm/io.h>
|
|
#include <asm/time.h>
|
|
#include <asm/rm9k-ocd.h>
|
|
|
|
#include <excite.h>
|
|
|
|
#define TITAN_UART_CLK 25000000
|
|
|
|
#if 1
|
|
/* normal serial port assignment */
|
|
#define REGBASE_SER0 0x0208
|
|
#define REGBASE_SER1 0x0238
|
|
#define MASK_SER0 0x1
|
|
#define MASK_SER1 0x2
|
|
#else
|
|
/* serial ports swapped */
|
|
#define REGBASE_SER0 0x0238
|
|
#define REGBASE_SER1 0x0208
|
|
#define MASK_SER0 0x2
|
|
#define MASK_SER1 0x1
|
|
#endif
|
|
|
|
unsigned long memsize;
|
|
char modetty[30];
|
|
unsigned int titan_irq = TITAN_IRQ;
|
|
static void __iomem * ctl_regs;
|
|
u32 unit_id;
|
|
|
|
volatile void __iomem * const ocd_base = (void *) (EXCITE_ADDR_OCD);
|
|
volatile void __iomem * const titan_base = (void *) (EXCITE_ADDR_TITAN);
|
|
|
|
/* Protect access to shared GPI registers */
|
|
spinlock_t titan_lock = SPIN_LOCK_UNLOCKED;
|
|
int titan_irqflags;
|
|
|
|
|
|
static void excite_timer_init(void)
|
|
{
|
|
const u32 modebit5 = ocd_readl(0x00e4);
|
|
unsigned int
|
|
mult = ((modebit5 >> 11) & 0x1f) + 2,
|
|
div = ((modebit5 >> 16) & 0x1f) + 2;
|
|
|
|
if (div == 33) div = 1;
|
|
mips_hpt_frequency = EXCITE_CPU_EXT_CLOCK * mult / div / 2;
|
|
}
|
|
|
|
void __init plat_timer_setup(struct irqaction *irq)
|
|
{
|
|
/* The eXcite platform uses the alternate timer interrupt */
|
|
set_c0_intcontrol(0x80);
|
|
setup_irq(TIMER_IRQ, irq);
|
|
}
|
|
|
|
static int __init excite_init_console(void)
|
|
{
|
|
#if defined(CONFIG_SERIAL_8250)
|
|
static __initdata char serr[] =
|
|
KERN_ERR "Serial port #%u setup failed\n";
|
|
struct uart_port up;
|
|
|
|
/* Take the DUART out of reset */
|
|
titan_writel(0x00ff1cff, CPRR);
|
|
|
|
#if defined(CONFIG_KGDB) || (CONFIG_SERIAL_8250_NR_UARTS > 1)
|
|
/* Enable both ports */
|
|
titan_writel(MASK_SER0 | MASK_SER1, UACFG);
|
|
#else
|
|
/* Enable port #0 only */
|
|
titan_writel(MASK_SER0, UACFG);
|
|
#endif /* defined(CONFIG_KGDB) */
|
|
|
|
/*
|
|
* Set up serial port #0. Do not use autodetection; the result is
|
|
* not what we want.
|
|
*/
|
|
memset(&up, 0, sizeof(up));
|
|
up.membase = (char *) titan_addr(REGBASE_SER0);
|
|
up.irq = TITAN_IRQ;
|
|
up.uartclk = TITAN_UART_CLK;
|
|
up.regshift = 0;
|
|
up.iotype = UPIO_MEM32;
|
|
up.type = PORT_RM9000;
|
|
up.flags = UPF_SHARE_IRQ;
|
|
up.line = 0;
|
|
if (early_serial_setup(&up))
|
|
printk(serr, up.line);
|
|
|
|
#if CONFIG_SERIAL_8250_NR_UARTS > 1
|
|
/* And now for port #1. */
|
|
up.membase = (char *) titan_addr(REGBASE_SER1);
|
|
up.line = 1;
|
|
if (early_serial_setup(&up))
|
|
printk(serr, up.line);
|
|
#endif /* CONFIG_SERIAL_8250_NR_UARTS > 1 */
|
|
#else
|
|
/* Leave the DUART in reset */
|
|
titan_writel(0x00ff3cff, CPRR);
|
|
#endif /* defined(CONFIG_SERIAL_8250) */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init excite_platform_init(void)
|
|
{
|
|
unsigned int i;
|
|
unsigned char buf[3];
|
|
u8 reg;
|
|
void __iomem * dpr;
|
|
|
|
/* BIU buffer allocations */
|
|
ocd_writel(8, CPURSLMT); /* CPU */
|
|
titan_writel(4, CPGRWL); /* GPI / Ethernet */
|
|
|
|
/* Map control registers located in FPGA */
|
|
ctl_regs = ioremap_nocache(EXCITE_PHYS_FPGA + EXCITE_FPGA_SYSCTL, 16);
|
|
if (!ctl_regs)
|
|
panic("eXcite: failed to map platform control registers\n");
|
|
memcpy_fromio(buf, ctl_regs + 2, ARRAY_SIZE(buf));
|
|
unit_id = buf[0] | (buf[1] << 8) | (buf[2] << 16);
|
|
|
|
/* Clear the reboot flag */
|
|
dpr = ioremap_nocache(EXCITE_PHYS_FPGA + EXCITE_FPGA_DPR, 1);
|
|
reg = __raw_readb(dpr);
|
|
__raw_writeb(reg & 0x7f, dpr);
|
|
iounmap(dpr);
|
|
|
|
/* Interrupt controller setup */
|
|
for (i = INTP0Status0; i < INTP0Status0 + 0x80; i += 0x10) {
|
|
ocd_writel(0x00000000, i + 0x04);
|
|
ocd_writel(0xffffffff, i + 0x0c);
|
|
}
|
|
ocd_writel(0x2, NMICONFIG);
|
|
|
|
ocd_writel(0x1 << (TITAN_MSGINT % 0x20),
|
|
INTP0Mask0 + (0x10 * (TITAN_MSGINT / 0x20)));
|
|
ocd_writel((0x1 << (FPGA0_MSGINT % 0x20))
|
|
| ocd_readl(INTP0Mask0 + (0x10 * (FPGA0_MSGINT / 0x20))),
|
|
INTP0Mask0 + (0x10 * (FPGA0_MSGINT / 0x20)));
|
|
ocd_writel((0x1 << (FPGA1_MSGINT % 0x20))
|
|
| ocd_readl(INTP0Mask0 + (0x10 * (FPGA1_MSGINT / 0x20))),
|
|
INTP0Mask0 + (0x10 * (FPGA1_MSGINT / 0x20)));
|
|
ocd_writel((0x1 << (PHY_MSGINT % 0x20))
|
|
| ocd_readl(INTP0Mask0 + (0x10 * (PHY_MSGINT / 0x20))),
|
|
INTP0Mask0 + (0x10 * (PHY_MSGINT / 0x20)));
|
|
#if USB_IRQ < 10
|
|
ocd_writel((0x1 << (USB_MSGINT % 0x20))
|
|
| ocd_readl(INTP0Mask0 + (0x10 * (USB_MSGINT / 0x20))),
|
|
INTP0Mask0 + (0x10 * (USB_MSGINT / 0x20)));
|
|
#endif
|
|
/* Enable the packet FIFO, XDMA and XDMA arbiter */
|
|
titan_writel(0x00ff18ff, CPRR);
|
|
|
|
/*
|
|
* Set up the PADMUX. Power down all ethernet slices,
|
|
* they will be powered up and configured at device startup.
|
|
*/
|
|
titan_writel(0x00878206, CPTC1R);
|
|
titan_writel(0x00001100, CPTC0R); /* latch PADMUX, enable WCIMODE */
|
|
|
|
/* Reset and enable the FIFO block */
|
|
titan_writel(0x00000001, SDRXFCIE);
|
|
titan_writel(0x00000001, SDTXFCIE);
|
|
titan_writel(0x00000100, SDRXFCIE);
|
|
titan_writel(0x00000000, SDTXFCIE);
|
|
|
|
/*
|
|
* Initialize the common interrupt shared by all components of
|
|
* the GPI/Ethernet subsystem.
|
|
*/
|
|
titan_writel((EXCITE_PHYS_OCD >> 12), CPCFG0);
|
|
titan_writel(TITAN_MSGINT, CPCFG1);
|
|
|
|
/*
|
|
* XDMA configuration.
|
|
* In order for the XDMA to be sharable among multiple drivers,
|
|
* the setup must be done here in the platform. The reason is that
|
|
* this setup can only be done while the XDMA is in reset. If this
|
|
* were done in a driver, it would interrupt all other drivers
|
|
* using the XDMA.
|
|
*/
|
|
titan_writel(0x80021dff, GXCFG); /* XDMA reset */
|
|
titan_writel(0x00000000, CPXCISRA);
|
|
titan_writel(0x00000000, CPXCISRB); /* clear pending interrupts */
|
|
#if defined (CONFIG_HIGHMEM)
|
|
# error change for HIGHMEM support!
|
|
#else
|
|
titan_writel(0x00000000, GXDMADRPFX); /* buffer address prefix */
|
|
#endif
|
|
titan_writel(0, GXDMA_DESCADR);
|
|
|
|
for (i = 0x5040; i <= 0x5300; i += 0x0040)
|
|
titan_writel(0x80080000, i); /* reset channel */
|
|
|
|
titan_writel((0x1 << 29) /* no sparse tx descr. */
|
|
| (0x1 << 28) /* no sparse rx descr. */
|
|
| (0x1 << 23) | (0x1 << 24) /* descriptor coherency */
|
|
| (0x1 << 21) | (0x1 << 22) /* data coherency */
|
|
| (0x1 << 17)
|
|
| 0x1dff,
|
|
GXCFG);
|
|
|
|
#if defined(CONFIG_SMP)
|
|
# error No SMP support
|
|
#else
|
|
/* All interrupts go to core #0 only. */
|
|
titan_writel(0x1f007fff, CPDST0A);
|
|
titan_writel(0x00000000, CPDST0B);
|
|
titan_writel(0x0000ff3f, CPDST1A);
|
|
titan_writel(0x00000000, CPDST1B);
|
|
titan_writel(0x00ffffff, CPXDSTA);
|
|
titan_writel(0x00000000, CPXDSTB);
|
|
#endif
|
|
|
|
/* Enable DUART interrupts, disable everything else. */
|
|
titan_writel(0x04000000, CPGIG0ER);
|
|
titan_writel(0x000000c0, CPGIG1ER);
|
|
|
|
excite_procfs_init();
|
|
return 0;
|
|
}
|
|
|
|
void __init plat_mem_setup(void)
|
|
{
|
|
volatile u32 * const boot_ocd_base = (u32 *) 0xbf7fc000;
|
|
|
|
/* Announce RAM to system */
|
|
add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
|
|
|
|
/* Set up timer initialization hooks */
|
|
board_time_init = excite_timer_init;
|
|
|
|
/* Set up the peripheral address map */
|
|
*(boot_ocd_base + (LKB9 / sizeof (u32))) = 0;
|
|
*(boot_ocd_base + (LKB10 / sizeof (u32))) = 0;
|
|
*(boot_ocd_base + (LKB11 / sizeof (u32))) = 0;
|
|
*(boot_ocd_base + (LKB12 / sizeof (u32))) = 0;
|
|
wmb();
|
|
*(boot_ocd_base + (LKB0 / sizeof (u32))) = EXCITE_PHYS_OCD >> 4;
|
|
wmb();
|
|
|
|
ocd_writel((EXCITE_PHYS_TITAN >> 4) | 0x1UL, LKB5);
|
|
ocd_writel(((EXCITE_SIZE_TITAN >> 4) & 0x7fffff00) - 0x100, LKM5);
|
|
ocd_writel((EXCITE_PHYS_SCRAM >> 4) | 0x1UL, LKB13);
|
|
ocd_writel(((EXCITE_SIZE_SCRAM >> 4) & 0xffffff00) - 0x100, LKM13);
|
|
|
|
/* Local bus slot #0 */
|
|
ocd_writel(0x00040510, LDP0);
|
|
ocd_writel((EXCITE_PHYS_BOOTROM >> 4) | 0x1UL, LKB9);
|
|
ocd_writel(((EXCITE_SIZE_BOOTROM >> 4) & 0x03ffff00) - 0x100, LKM9);
|
|
|
|
/* Local bus slot #2 */
|
|
ocd_writel(0x00000330, LDP2);
|
|
ocd_writel((EXCITE_PHYS_FPGA >> 4) | 0x1, LKB11);
|
|
ocd_writel(((EXCITE_SIZE_FPGA >> 4) - 0x100) & 0x03ffff00, LKM11);
|
|
|
|
/* Local bus slot #3 */
|
|
ocd_writel(0x00123413, LDP3);
|
|
ocd_writel((EXCITE_PHYS_NAND >> 4) | 0x1, LKB12);
|
|
ocd_writel(((EXCITE_SIZE_NAND >> 4) - 0x100) & 0x03ffff00, LKM12);
|
|
}
|
|
|
|
|
|
|
|
console_initcall(excite_init_console);
|
|
arch_initcall(excite_platform_init);
|
|
|
|
EXPORT_SYMBOL(titan_lock);
|
|
EXPORT_SYMBOL(titan_irqflags);
|
|
EXPORT_SYMBOL(titan_irq);
|
|
EXPORT_SYMBOL(ocd_base);
|
|
EXPORT_SYMBOL(titan_base);
|