diff options
Diffstat (limited to 'kernel/arch/mips/mti-malta/malta-setup.c')
| -rw-r--r-- | kernel/arch/mips/mti-malta/malta-setup.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/kernel/arch/mips/mti-malta/malta-setup.c b/kernel/arch/mips/mti-malta/malta-setup.c new file mode 100644 index 000000000..db7c9e582 --- /dev/null +++ b/kernel/arch/mips/mti-malta/malta-setup.c @@ -0,0 +1,289 @@ +/* + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. + * Copyright (C) 2008 Dmitri Vorobiev + * + * This program is free software; you can distribute it and/or modify it + * under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope 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/cpu.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/irq.h> +#include <linux/pci.h> +#include <linux/screen_info.h> +#include <linux/time.h> + +#include <asm/fw/fw.h> +#include <asm/mips-cm.h> +#include <asm/mips-boards/generic.h> +#include <asm/mips-boards/malta.h> +#include <asm/mips-boards/maltaint.h> +#include <asm/dma.h> +#include <asm/traps.h> +#ifdef CONFIG_VT +#include <linux/console.h> +#endif + +extern void malta_be_init(void); +extern int malta_be_handler(struct pt_regs *regs, int is_fixup); + +static struct resource standard_io_resources[] = { + { + .name = "dma1", + .start = 0x00, + .end = 0x1f, + .flags = IORESOURCE_BUSY + }, + { + .name = "timer", + .start = 0x40, + .end = 0x5f, + .flags = IORESOURCE_BUSY + }, + { + .name = "keyboard", + .start = 0x60, + .end = 0x6f, + .flags = IORESOURCE_BUSY + }, + { + .name = "dma page reg", + .start = 0x80, + .end = 0x8f, + .flags = IORESOURCE_BUSY + }, + { + .name = "dma2", + .start = 0xc0, + .end = 0xdf, + .flags = IORESOURCE_BUSY + }, +}; + +const char *get_system_type(void) +{ + return "MIPS Malta"; +} + +const char display_string[] = " LINUX ON MALTA "; + +#ifdef CONFIG_BLK_DEV_FD +static void __init fd_activate(void) +{ + /* + * Activate Floppy Controller in the SMSC FDC37M817 Super I/O + * Controller. + * Done by YAMON 2.00 onwards + */ + /* Entering config state. */ + SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG); + + /* Activate floppy controller. */ + SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG); + SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG); + SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG); + SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG); + + /* Exit config state. */ + SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG); +} +#endif + +static int __init plat_enable_iocoherency(void) +{ + int supported = 0; + if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO) { + if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) { + BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN; + pr_info("Enabled Bonito CPU coherency\n"); + supported = 1; + } + if (strstr(fw_getcmdline(), "iobcuncached")) { + BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN; + BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG & + ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | + BONITO_PCIMEMBASECFG_MEMBASE1_CACHED); + pr_info("Disabled Bonito IOBC coherency\n"); + } else { + BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN; + BONITO_PCIMEMBASECFG |= + (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | + BONITO_PCIMEMBASECFG_MEMBASE1_CACHED); + pr_info("Enabled Bonito IOBC coherency\n"); + } + } else if (mips_cm_numiocu() != 0) { + /* Nothing special needs to be done to enable coherency */ + pr_info("CMP IOCU detected\n"); + if ((*(unsigned int *)0xbf403000 & 0x81) != 0x81) { + pr_crit("IOCU OPERATION DISABLED BY SWITCH - DEFAULTING TO SW IO COHERENCY\n"); + return 0; + } + supported = 1; + } + hw_coherentio = supported; + return supported; +} + +static void __init plat_setup_iocoherency(void) +{ +#ifdef CONFIG_DMA_NONCOHERENT + /* + * Kernel has been configured with software coherency + * but we might choose to turn it off and use hardware + * coherency instead. + */ + if (plat_enable_iocoherency()) { + if (coherentio == 0) + pr_info("Hardware DMA cache coherency disabled\n"); + else + pr_info("Hardware DMA cache coherency enabled\n"); + } else { + if (coherentio == 1) + pr_info("Hardware DMA cache coherency unsupported, but enabled from command line!\n"); + else + pr_info("Software DMA cache coherency enabled\n"); + } +#else + if (!plat_enable_iocoherency()) + panic("Hardware DMA cache coherency not supported!"); +#endif +} + +static void __init pci_clock_check(void) +{ + unsigned int __iomem *jmpr_p = + (unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int)); + int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07; + static const int pciclocks[] __initconst = { + 33, 20, 25, 30, 12, 16, 37, 10 + }; + int pciclock = pciclocks[jmpr]; + char *optptr, *argptr = fw_getcmdline(); + + /* + * If user passed a pci_clock= option, don't tack on another one + */ + optptr = strstr(argptr, "pci_clock="); + if (optptr && (optptr == argptr || optptr[-1] == ' ')) + return; + + if (pciclock != 33) { + pr_warn("WARNING: PCI clock is %dMHz, setting pci_clock\n", + pciclock); + argptr += strlen(argptr); + sprintf(argptr, " pci_clock=%d", pciclock); + if (pciclock < 20 || pciclock > 66) + pr_warn("WARNING: IDE timing calculations will be " + "incorrect\n"); + } +} + +#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE) +static void __init screen_info_setup(void) +{ + screen_info = (struct screen_info) { + .orig_x = 0, + .orig_y = 25, + .ext_mem_k = 0, + .orig_video_page = 0, + .orig_video_mode = 0, + .orig_video_cols = 80, + .unused2 = 0, + .orig_video_ega_bx = 0, + .unused3 = 0, + .orig_video_lines = 25, + .orig_video_isVGA = VIDEO_TYPE_VGAC, + .orig_video_points = 16 + }; +} +#endif + +static void __init bonito_quirks_setup(void) +{ + char *argptr; + + argptr = fw_getcmdline(); + if (strstr(argptr, "debug")) { + BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE; + pr_info("Enabled Bonito debug mode\n"); + } else + BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE; + +#ifdef CONFIG_DMA_COHERENT + if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) { + BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN; + pr_info("Enabled Bonito CPU coherency\n"); + + argptr = fw_getcmdline(); + if (strstr(argptr, "iobcuncached")) { + BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN; + BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG & + ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | + BONITO_PCIMEMBASECFG_MEMBASE1_CACHED); + pr_info("Disabled Bonito IOBC coherency\n"); + } else { + BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN; + BONITO_PCIMEMBASECFG |= + (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED | + BONITO_PCIMEMBASECFG_MEMBASE1_CACHED); + pr_info("Enabled Bonito IOBC coherency\n"); + } + } else + panic("Hardware DMA cache coherency not supported"); +#endif +} + +void __init plat_mem_setup(void) +{ + unsigned int i; + + if (config_enabled(CONFIG_EVA)) + /* EVA has already been configured in mach-malta/kernel-init.h */ + pr_info("Enhanced Virtual Addressing (EVA) activated\n"); + + mips_pcibios_init(); + + /* Request I/O space for devices used on the Malta board. */ + for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++) + request_resource(&ioport_resource, standard_io_resources+i); + + /* + * Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge. + */ + enable_dma(4); + +#ifdef CONFIG_DMA_COHERENT + if (mips_revision_sconid != MIPS_REVISION_SCON_BONITO) + panic("Hardware DMA cache coherency not supported"); +#endif + + if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO) + bonito_quirks_setup(); + + plat_setup_iocoherency(); + + pci_clock_check(); + +#ifdef CONFIG_BLK_DEV_FD + fd_activate(); +#endif + +#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE) + screen_info_setup(); +#endif + + board_be_init = malta_be_init; + board_be_handler = malta_be_handler; +} |