--- /dev/null
+/*
+ * 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);
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