diff options
author | Ralf Baechle <ralf@linux-mips.org> | 1998-08-25 09:12:35 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 1998-08-25 09:12:35 +0000 |
commit | c7fc24dc4420057f103afe8fc64524ebc25c5d37 (patch) | |
tree | 3682407a599b8f9f03fc096298134cafba1c9b2f /arch/alpha/kernel/sys_sio.c | |
parent | 1d793fade8b063fde3cf275bf1a5c2d381292cd9 (diff) |
o Merge with Linux 2.1.116.
o New Newport console code.
o New G364 console code.
Diffstat (limited to 'arch/alpha/kernel/sys_sio.c')
-rw-r--r-- | arch/alpha/kernel/sys_sio.c | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/arch/alpha/kernel/sys_sio.c b/arch/alpha/kernel/sys_sio.c new file mode 100644 index 000000000..dfd6adaa7 --- /dev/null +++ b/arch/alpha/kernel/sys_sio.c @@ -0,0 +1,470 @@ +/* + * linux/arch/alpha/kernel/sys_sio.c + * + * Copyright (C) 1995 David A Rusling + * Copyright (C) 1996 Jay A Estabrook + * Copyright (C) 1998 Richard Henderson + * + * Code for all boards that route the PCI interrupts through the SIO + * PCI/ISA bridge. This includes Noname (AXPpci33), Multia (UDB), + * Kenetics's Platform 2000, Avanti (AlphaStation), XL, and AlphaBook1. + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/pci.h> +#include <linux/init.h> + +#include <asm/compiler.h> +#include <asm/ptrace.h> +#include <asm/system.h> +#include <asm/dma.h> +#include <asm/irq.h> +#include <asm/mmu_context.h> +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/core_apecs.h> +#include <asm/core_lca.h> + +#include "proto.h" +#include "irq.h" +#include "bios32.h" +#include "machvec.h" + +static void +sio_update_irq_hw(unsigned long irq, unsigned long mask, int unmask_p) +{ + if (irq >= 8) + outb(mask >> 8, 0xA1); + else + outb(mask, 0x21); +} + +static void __init +sio_init_irq(void) +{ + STANDARD_INIT_IRQ_PROLOG; + + if (alpha_using_srm) + alpha_mv.device_interrupt = srm_device_interrupt; + + enable_irq(2); /* enable cascade */ +} + +static inline void __init +xl_init_arch(unsigned long *mem_start, unsigned long *mem_end) +{ + /* + * Set up the PCI->physical memory translation windows. For + * the XL we *must* use both windows, in order to maximize the + * amount of physical memory that can be used to DMA from the + * ISA bus, and still allow PCI bus devices access to all of + * host memory. + * + * See <asm/apecs.h> for window bases and sizes. + * + * This restriction due to the true XL motherboards' 82379AB SIO + * PCI<->ISA bridge chip which passes only 27 bits of address... + */ + + *(vuip)APECS_IOC_PB1R = 1<<19 | (APECS_XL_DMA_WIN1_BASE & 0xfff00000U); + *(vuip)APECS_IOC_PM1R = (APECS_XL_DMA_WIN1_SIZE - 1) & 0xfff00000U; + *(vuip)APECS_IOC_TB1R = 0; + + *(vuip)APECS_IOC_PB2R = 1<<19 | (APECS_XL_DMA_WIN2_BASE & 0xfff00000U); + *(vuip)APECS_IOC_PM2R = (APECS_XL_DMA_WIN2_SIZE - 1) & 0xfff00000U; + *(vuip)APECS_IOC_TB2R = 0; + + /* + * Finally, clear the HAXR2 register, which gets used for PCI + * Config Space accesses. That is the way we want to use it, + * and we do not want to depend on what ARC or SRM might have + * left behind... + */ + + *(vuip)APECS_IOC_HAXR2 = 0; mb(); +} + +static inline void __init +alphabook1_init_arch(unsigned long *mem_start, unsigned long *mem_end) +{ + /* The AlphaBook1 has LCD video fixed at 800x600, + 37 rows and 100 cols. */ + screen_info.orig_y = 37; + screen_info.orig_video_cols = 100; + screen_info.orig_video_lines = 37; + + lca_init_arch(mem_start, mem_end); +} + + +/* + * sio_route_tab selects irq routing in PCI/ISA bridge so that: + * PIRQ0 -> irq 15 + * PIRQ1 -> irq 9 + * PIRQ2 -> irq 10 + * PIRQ3 -> irq 11 + * + * This probably ought to be configurable via MILO. For + * example, sound boards seem to like using IRQ 9. + */ +static unsigned long sio_route_tab __initdata = 0; + +static void __init +sio_pci_fixup(int (*map_irq)(struct pci_dev *dev, int sel, int pin), + unsigned long new_route_tab) +{ + unsigned int route_tab; + + /* Examine or update the PCI routing table. */ + pcibios_read_config_dword(0, PCI_DEVFN(7, 0), 0x60, &route_tab); + + sio_route_tab = route_tab; + if (PCI_MODIFY) { + sio_route_tab = new_route_tab; + pcibios_write_config_dword(0, PCI_DEVFN(7, 0), 0x60, + new_route_tab); + } + + /* Update all the IRQs. */ + common_pci_fixup(map_irq, common_swizzle); +} + +static unsigned int __init +sio_collect_irq_levels(void) +{ + unsigned int level_bits = 0; + struct pci_dev *dev; + + /* Iterate through the devices, collecting IRQ levels. */ + for (dev = pci_devices; dev; dev = dev->next) { + if ((dev->class >> 16 == PCI_BASE_CLASS_BRIDGE) && + (dev->class >> 8 != PCI_CLASS_BRIDGE_PCMCIA)) + continue; + + if (dev->irq) + level_bits |= (1 << dev->irq); + } + return level_bits; +} + +static void __init +sio_fixup_irq_levels(unsigned int level_bits) +{ + unsigned int old_level_bits; + + /* + * Now, make all PCI interrupts level sensitive. Notice: + * these registers must be accessed byte-wise. inw()/outw() + * don't work. + * + * Make sure to turn off any level bits set for IRQs 9,10,11,15, + * so that the only bits getting set are for devices actually found. + * Note that we do preserve the remainder of the bits, which we hope + * will be set correctly by ARC/SRM. + * + * Note: we at least preserve any level-set bits on AlphaBook1 + */ + old_level_bits = inb(0x4d0) | (inb(0x4d1) << 8); + + level_bits |= (old_level_bits & 0x71ff); + + outb((level_bits >> 0) & 0xff, 0x4d0); + outb((level_bits >> 8) & 0xff, 0x4d1); +} + +static inline int __init +noname_map_irq(struct pci_dev *dev, int slot, int pin) +{ + /* + * The Noname board has 5 PCI slots with each of the 4 + * interrupt pins routed to different pins on the PCI/ISA + * bridge (PIRQ0-PIRQ3). The table below is based on + * information available at: + * + * http://ftp.digital.com/pub/DEC/axppci/ref_interrupts.txt + * + * I have no information on the Avanti interrupt routing, but + * the routing seems to be identical to the Noname except + * that the Avanti has an additional slot whose routing I'm + * unsure of. + * + * pirq_tab[0] is a fake entry to deal with old PCI boards + * that have the interrupt pin number hardwired to 0 (meaning + * that they use the default INTA line, if they are interrupt + * driven at all). + */ + static char irq_tab[][5] __initlocaldata = { + /*INT A B C D */ + { 3, 3, 3, 3, 3}, /* idsel 6 (53c810) */ + {-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */ + { 2, 2, -1, -1, -1}, /* idsel 8 (Hack: slot closest ISA) */ + {-1, -1, -1, -1, -1}, /* idsel 9 (unused) */ + {-1, -1, -1, -1, -1}, /* idsel 10 (unused) */ + { 0, 0, 2, 1, 0}, /* idsel 11 KN25_PCI_SLOT0 */ + { 1, 1, 0, 2, 1}, /* idsel 12 KN25_PCI_SLOT1 */ + { 2, 2, 1, 0, 2}, /* idsel 13 KN25_PCI_SLOT2 */ + { 0, 0, 0, 0, 0}, /* idsel 14 AS255 TULIP */ + }; + const long min_idsel = 6, max_idsel = 14, irqs_per_slot = 5; + int irq = COMMON_TABLE_LOOKUP, tmp; + tmp = __kernel_extbl(sio_route_tab, irq); + return irq >= 0 ? tmp : -1; +} + +static inline void __init +noname_pci_fixup(void) +{ + /* + * For UDB, the only available PCI slot must not map to IRQ 9, + * since that's the builtin MSS sound chip. That PCI slot + * will map to PIRQ1 (for INTA at least), so we give it IRQ 15 + * instead. + * + * Unfortunately we have to do this for NONAME as well, since + * they are co-indicated when the platform type "Noname" is + * selected... :-( + */ + layout_all_busses(DEFAULT_IO_BASE, APECS_AND_LCA_DEFAULT_MEM_BASE); + sio_pci_fixup(noname_map_irq, 0x0b0a0f09); + sio_fixup_irq_levels(sio_collect_irq_levels()); + enable_ide(0x26e); +} + +static inline void __init +avanti_pci_fixup(void) +{ + layout_all_busses(DEFAULT_IO_BASE, APECS_AND_LCA_DEFAULT_MEM_BASE); + sio_pci_fixup(noname_map_irq, 0x0b0a090f); + sio_fixup_irq_levels(sio_collect_irq_levels()); + enable_ide(0x26e); +} + +static inline void __init +xl_pci_fixup(void) +{ + layout_all_busses(DEFAULT_IO_BASE, XL_DEFAULT_MEM_BASE); + sio_pci_fixup(noname_map_irq, 0x0b0a090f); + sio_fixup_irq_levels(sio_collect_irq_levels()); + enable_ide(0x26e); +} + +static inline int __init +p2k_map_irq(struct pci_dev *dev, int slot, int pin) +{ + static char irq_tab[][5] __initlocaldata = { + /*INT A B C D */ + { 0, 0, -1, -1, -1}, /* idsel 6 (53c810) */ + {-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */ + { 1, 1, 2, 3, 0}, /* idsel 8 (slot A) */ + { 2, 2, 3, 0, 1}, /* idsel 9 (slot B) */ + {-1, -1, -1, -1, -1}, /* idsel 10 (unused) */ + {-1, -1, -1, -1, -1}, /* idsel 11 (unused) */ + { 3, 3, -1, -1, -1}, /* idsel 12 (CMD0646) */ + }; + const long min_idsel = 6, max_idsel = 12, irqs_per_slot = 5; + int irq = COMMON_TABLE_LOOKUP, tmp; + tmp = __kernel_extbl(sio_route_tab, irq); + return irq >= 0 ? tmp : -1; +} + +static inline void __init +p2k_pci_fixup(void) +{ + layout_all_busses(DEFAULT_IO_BASE, APECS_AND_LCA_DEFAULT_MEM_BASE); + sio_pci_fixup(p2k_map_irq, 0x0b0a090f); + sio_fixup_irq_levels(sio_collect_irq_levels()); + enable_ide(0x26e); +} + +static inline void __init +alphabook1_pci_fixup(void) +{ + struct pci_dev *dev; + unsigned char orig, config; + + layout_all_busses(DEFAULT_IO_BASE, APECS_AND_LCA_DEFAULT_MEM_BASE); + + /* For the AlphaBook1, NCR810 SCSI is 14, PCMCIA controller is 15. */ + sio_pci_fixup(noname_map_irq, 0x0e0f0a0a); + + /* + * On the AlphaBook1, the PCMCIA chip (Cirrus 6729) + * is sensitive to PCI bus bursts, so we must DISABLE + * burst mode for the NCR 8xx SCSI... :-( + * + * Note that the NCR810 SCSI driver must preserve the + * setting of the bit in order for this to work. At the + * moment (2.0.29), ncr53c8xx.c does NOT do this, but + * 53c7,8xx.c DOES. + */ + for (dev = pci_devices; dev; dev = dev->next) { + if (dev->vendor == PCI_VENDOR_ID_NCR && + (dev->device == PCI_DEVICE_ID_NCR_53C810 || + dev->device == PCI_DEVICE_ID_NCR_53C815 || + dev->device == PCI_DEVICE_ID_NCR_53C820 || + dev->device == PCI_DEVICE_ID_NCR_53C825)) { + unsigned int io_port; + unsigned char ctest4; + + pcibios_read_config_dword(dev->bus->number, + dev->devfn, + PCI_BASE_ADDRESS_0, + &io_port); + io_port &= PCI_BASE_ADDRESS_IO_MASK; + ctest4 = inb(io_port+0x21); + if (!(ctest4 & 0x80)) { + printk("AlphaBook1 NCR init: setting" + " burst disable\n"); + outb(ctest4 | 0x80, io_port+0x21); + } + } + } + + /* Do not set *ANY* level triggers for AlphaBook1. */ + sio_fixup_irq_levels(0); + + /* Make sure that register PR1 indicates 1Mb mem */ + outb(0x0f, 0x3ce); orig = inb(0x3cf); /* read PR5 */ + outb(0x0f, 0x3ce); outb(0x05, 0x3cf); /* unlock PR0-4 */ + outb(0x0b, 0x3ce); config = inb(0x3cf); /* read PR1 */ + if ((config & 0xc0) != 0xc0) { + printk("AlphaBook1 VGA init: setting 1Mb memory\n"); + config |= 0xc0; + outb(0x0b, 0x3ce); outb(config, 0x3cf); /* write PR1 */ + } + outb(0x0f, 0x3ce); outb(orig, 0x3cf); /* (re)lock PR0-4 */ +} + + +/* + * The System Vectors + */ + +#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_BOOK1) +struct alpha_machine_vector alphabook1_mv __initmv = { + vector_name: "AlphaBook1", + DO_EV4_MMU, + DO_DEFAULT_RTC, + DO_LCA_IO, + DO_LCA_BUS, + machine_check: lca_machine_check, + max_dma_address: ALPHA_MAX_DMA_ADDRESS, + + nr_irqs: 16, + irq_probe_mask: _PROBE_MASK(16), + update_irq_hw: sio_update_irq_hw, + ack_irq: generic_ack_irq, + device_interrupt: isa_device_interrupt, + + init_arch: alphabook1_init_arch, + init_irq: sio_init_irq, + init_pit: generic_init_pit, + pci_fixup: alphabook1_pci_fixup, + kill_arch: generic_kill_arch, +}; +ALIAS_MV(alphabook1) +#endif + +#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_AVANTI) +struct alpha_machine_vector avanti_mv __initmv = { + vector_name: "Avanti", + DO_EV4_MMU, + DO_DEFAULT_RTC, + DO_APECS_IO, + DO_APECS_BUS, + machine_check: apecs_machine_check, + max_dma_address: ALPHA_MAX_DMA_ADDRESS, + + nr_irqs: 16, + irq_probe_mask: _PROBE_MASK(16), + update_irq_hw: sio_update_irq_hw, + ack_irq: generic_ack_irq, + device_interrupt: isa_device_interrupt, + + init_arch: apecs_init_arch, + init_irq: sio_init_irq, + init_pit: generic_init_pit, + pci_fixup: avanti_pci_fixup, + kill_arch: generic_kill_arch, +}; +ALIAS_MV(avanti) +#endif + +#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_NONAME) +struct alpha_machine_vector noname_mv __initmv = { + vector_name: "Noname", + DO_EV4_MMU, + DO_DEFAULT_RTC, + DO_LCA_IO, + DO_LCA_BUS, + machine_check: lca_machine_check, + max_dma_address: ALPHA_MAX_DMA_ADDRESS, + + nr_irqs: 16, + irq_probe_mask: _PROBE_MASK(16), + update_irq_hw: sio_update_irq_hw, + ack_irq: generic_ack_irq, + device_interrupt: srm_device_interrupt, + + init_arch: lca_init_arch, + init_irq: sio_init_irq, + init_pit: generic_init_pit, + pci_fixup: noname_pci_fixup, + kill_arch: generic_kill_arch, +}; +ALIAS_MV(noname) +#endif + +#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_P2K) +struct alpha_machine_vector p2k_mv __initmv = { + vector_name: "Platform2000", + DO_EV4_MMU, + DO_DEFAULT_RTC, + DO_LCA_IO, + DO_LCA_BUS, + machine_check: lca_machine_check, + max_dma_address: ALPHA_MAX_DMA_ADDRESS, + + nr_irqs: 16, + irq_probe_mask: P2K_PROBE_MASK, + update_irq_hw: sio_update_irq_hw, + ack_irq: generic_ack_irq, + device_interrupt: srm_device_interrupt, + + init_arch: lca_init_arch, + init_irq: sio_init_irq, + init_pit: generic_init_pit, + pci_fixup: p2k_pci_fixup, + kill_arch: generic_kill_arch, +}; +ALIAS_MV(p2k) +#endif + +#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_XL) +struct alpha_machine_vector xl_mv __initmv = { + vector_name: "XL", + DO_EV4_MMU, + DO_DEFAULT_RTC, + DO_APECS_IO, + BUS(apecs_xl), + machine_check: apecs_machine_check, + max_dma_address: ALPHA_XL_MAX_DMA_ADDRESS, + + nr_irqs: 16, + irq_probe_mask: _PROBE_MASK(16), + update_irq_hw: sio_update_irq_hw, + ack_irq: generic_ack_irq, + device_interrupt: isa_device_interrupt, + + init_arch: xl_init_arch, + init_irq: sio_init_irq, + init_pit: generic_init_pit, + pci_fixup: xl_pci_fixup, + kill_arch: generic_kill_arch, +}; +ALIAS_MV(xl) +#endif |