diff options
Diffstat (limited to 'arch/mips/basler/excite/excite_setup.c')
| -rw-r--r-- | arch/mips/basler/excite/excite_setup.c | 307 |
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); |