| /* |
| * 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; |
| |
| |
| void __init plat_time_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_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); |