mirror of https://gitee.com/openkylin/linux.git
225 lines
5.7 KiB
C
225 lines
5.7 KiB
C
/*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
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* Copyright (C) 2008 Dmitri Vorobiev
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*/
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#include <linux/cpu.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/irq.h>
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#include <linux/pci.h>
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#include <linux/screen_info.h>
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#include <linux/time.h>
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#include <asm/bootinfo.h>
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#include <asm/mips-boards/generic.h>
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#include <asm/mips-boards/prom.h>
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#include <asm/mips-boards/malta.h>
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#include <asm/mips-boards/maltaint.h>
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#include <asm/dma.h>
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#include <asm/traps.h>
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#ifdef CONFIG_VT
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#include <linux/console.h>
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#endif
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extern void malta_be_init(void);
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extern int malta_be_handler(struct pt_regs *regs, int is_fixup);
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static struct resource standard_io_resources[] = {
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{
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.name = "dma1",
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.start = 0x00,
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.end = 0x1f,
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.flags = IORESOURCE_BUSY
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},
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{
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.name = "timer",
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.start = 0x40,
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.end = 0x5f,
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.flags = IORESOURCE_BUSY
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},
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{
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.name = "keyboard",
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.start = 0x60,
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.end = 0x6f,
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.flags = IORESOURCE_BUSY
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},
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{
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.name = "dma page reg",
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.start = 0x80,
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.end = 0x8f,
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.flags = IORESOURCE_BUSY
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},
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{
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.name = "dma2",
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.start = 0xc0,
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.end = 0xdf,
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.flags = IORESOURCE_BUSY
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},
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};
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const char *get_system_type(void)
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{
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return "MIPS Malta";
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}
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#if defined(CONFIG_MIPS_MT_SMTC)
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const char display_string[] = " SMTC LINUX ON MALTA ";
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#else
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const char display_string[] = " LINUX ON MALTA ";
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#endif /* CONFIG_MIPS_MT_SMTC */
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#ifdef CONFIG_BLK_DEV_FD
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static void __init fd_activate(void)
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{
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/*
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* Activate Floppy Controller in the SMSC FDC37M817 Super I/O
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* Controller.
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* Done by YAMON 2.00 onwards
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*/
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/* Entering config state. */
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SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG);
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/* Activate floppy controller. */
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SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG);
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SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG);
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SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG);
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SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG);
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/* Exit config state. */
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SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG);
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}
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#endif
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#ifdef CONFIG_BLK_DEV_IDE
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static void __init pci_clock_check(void)
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{
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unsigned int __iomem *jmpr_p =
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(unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
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int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
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static const int pciclocks[] __initconst = {
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33, 20, 25, 30, 12, 16, 37, 10
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};
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int pciclock = pciclocks[jmpr];
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char *argptr = prom_getcmdline();
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if (pciclock != 33 && !strstr(argptr, "idebus=")) {
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printk(KERN_WARNING "WARNING: PCI clock is %dMHz, "
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"setting idebus\n", pciclock);
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argptr += strlen(argptr);
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sprintf(argptr, " idebus=%d", pciclock);
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if (pciclock < 20 || pciclock > 66)
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printk(KERN_WARNING "WARNING: IDE timing "
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"calculations will be incorrect\n");
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}
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}
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#endif
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#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
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static void __init screen_info_setup(void)
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{
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screen_info = (struct screen_info) {
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.orig_x = 0,
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.orig_y = 25,
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.ext_mem_k = 0,
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.orig_video_page = 0,
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.orig_video_mode = 0,
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.orig_video_cols = 80,
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.unused2 = 0,
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.orig_video_ega_bx = 0,
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.unused3 = 0,
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.orig_video_lines = 25,
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.orig_video_isVGA = VIDEO_TYPE_VGAC,
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.orig_video_points = 16
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};
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}
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#endif
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static void __init bonito_quirks_setup(void)
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{
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char *argptr;
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argptr = prom_getcmdline();
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if (strstr(argptr, "debug")) {
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BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
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printk(KERN_INFO "Enabled Bonito debug mode\n");
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} else
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BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
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#ifdef CONFIG_DMA_COHERENT
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if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
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BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
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printk(KERN_INFO "Enabled Bonito CPU coherency\n");
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argptr = prom_getcmdline();
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if (strstr(argptr, "iobcuncached")) {
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BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
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BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
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~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
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BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
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printk(KERN_INFO "Disabled Bonito IOBC coherency\n");
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} else {
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BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
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BONITO_PCIMEMBASECFG |=
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(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
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BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
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printk(KERN_INFO "Enabled Bonito IOBC coherency\n");
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}
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} else
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panic("Hardware DMA cache coherency not supported");
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#endif
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}
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void __init plat_mem_setup(void)
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{
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unsigned int i;
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mips_pcibios_init();
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/* Request I/O space for devices used on the Malta board. */
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for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
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request_resource(&ioport_resource, standard_io_resources+i);
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/*
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* Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge.
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*/
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enable_dma(4);
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#ifdef CONFIG_DMA_COHERENT
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if (mips_revision_sconid != MIPS_REVISION_SCON_BONITO)
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panic("Hardware DMA cache coherency not supported");
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#endif
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if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO)
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bonito_quirks_setup();
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#ifdef CONFIG_BLK_DEV_IDE
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pci_clock_check();
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#endif
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#ifdef CONFIG_BLK_DEV_FD
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fd_activate();
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#endif
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#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
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screen_info_setup();
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#endif
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board_be_init = malta_be_init;
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board_be_handler = malta_be_handler;
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}
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