[MIPS] Support for the RM9000-based Basler eXcite smart camera platform.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 307 insertions, 0 deletions

diff --git a/arch/mips/basler/excite/excite_setup.c b/arch/mips/basler/excite/excite_setup.c
new file mode 100644
index 00000000000..005b025605e
--- /dev/null
+++ b/arch/mips/basler/excite/excite_setup.c
@@ -0,0 +1,307 @@
+/*
+ *  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/config.h>
+#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;
+}
+
+static void excite_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_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;
+	board_timer_setup = excite_timer_setup;
+
+	/* 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);