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linux/arch/mips/basler/excite/excite_setup.c

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/*
* 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/serial_8250.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 */
DEFINE_SPINLOCK(titan_lock);
int titan_irqflags;
/*
* The eXcite platform uses the alternate timer interrupt
*
* Fixme: At the time of this writing cevt-r4k.c doesn't yet know about how
* to handle the alternate timer interrupt of the RM9000.
*/
void __init plat_time_init(void)
{
const u32 modebit5 = ocd_readl(0x00e4);
unsigned int mult = ((modebit5 >> 11) & 0x1f) + 2;
unsigned int div = ((modebit5 >> 16) & 0x1f) + 2;
if (div == 33)
div = 1;
mips_hpt_frequency = EXCITE_CPU_EXT_CLOCK * mult / div / 2;
}
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 (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
/*
* 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_RM9000;
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 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);
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