diff options
author | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2006-12-28 18:22:32 +0100 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2007-02-18 21:31:37 +0000 |
commit | c066a32a890c50ce59e91f8cea8eb5fd8d5821b9 (patch) | |
tree | d129af235d11d44c649f0743bc38535c3a229e41 /arch/mips/sni/pcimt.c | |
parent | 5759906ca9e5201c3fd40d61c861ec1e441d3a24 (diff) |
[MIPS] Support for several more SNI RM models.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/sni/pcimt.c')
-rw-r--r-- | arch/mips/sni/pcimt.c | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/arch/mips/sni/pcimt.c b/arch/mips/sni/pcimt.c new file mode 100644 index 00000000000..6c0dad7cbf4 --- /dev/null +++ b/arch/mips/sni/pcimt.c @@ -0,0 +1,390 @@ +/* + * PCIMT specific code + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1996, 97, 98, 2000, 03, 04, 06 Ralf Baechle (ralf@linux-mips.org) + * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de) + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/serial_8250.h> + +#include <asm/mc146818-time.h> +#include <asm/sni.h> +#include <asm/time.h> +#include <asm/i8259.h> +#include <asm/irq_cpu.h> + +#define cacheconf (*(volatile unsigned int *)PCIMT_CACHECONF) +#define invspace (*(volatile unsigned int *)PCIMT_INVSPACE) + +static void __init sni_pcimt_sc_init(void) +{ + unsigned int scsiz, sc_size; + + scsiz = cacheconf & 7; + if (scsiz == 0) { + printk("Second level cache is deactived.\n"); + return; + } + if (scsiz >= 6) { + printk("Invalid second level cache size configured, " + "deactivating second level cache.\n"); + cacheconf = 0; + return; + } + + sc_size = 128 << scsiz; + printk("%dkb second level cache detected, deactivating.\n", sc_size); + cacheconf = 0; +} + + +/* + * A bit more gossip about the iron we're running on ... + */ +static inline void sni_pcimt_detect(void) +{ + char boardtype[80]; + unsigned char csmsr; + char *p = boardtype; + unsigned int asic; + + csmsr = *(volatile unsigned char *)PCIMT_CSMSR; + + p += sprintf(p, "%s PCI", (csmsr & 0x80) ? "RM200" : "RM300"); + if ((csmsr & 0x80) == 0) + p += sprintf(p, ", board revision %s", + (csmsr & 0x20) ? "D" : "C"); + asic = csmsr & 0x80; + asic = (csmsr & 0x08) ? asic : !asic; + p += sprintf(p, ", ASIC PCI Rev %s", asic ? "1.0" : "1.1"); + printk("%s.\n", boardtype); +} + +#define PORT(_base,_irq) \ + { \ + .iobase = _base, \ + .irq = _irq, \ + .uartclk = 1843200, \ + .iotype = UPIO_PORT, \ + .flags = UPF_BOOT_AUTOCONF, \ + } + +static struct plat_serial8250_port pcimt_data[] = { + PORT(0x3f8, 4), + PORT(0x2f8, 3), + { }, +}; + +static struct platform_device pcimt_serial8250_device = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev = { + .platform_data = pcimt_data, + }, +}; + +static struct resource sni_io_resource = { + .start = 0x00001000UL, + .end = 0x03bfffffUL, + .name = "PCIMT IO MEM", + .flags = IORESOURCE_IO, +}; + +static struct resource pcimt_io_resources[] = { + { + .start = 0x00, + .end = 0x1f, + .name = "dma1", + .flags = IORESOURCE_BUSY + }, { + .start = 0x40, + .end = 0x5f, + .name = "timer", + .flags = IORESOURCE_BUSY + }, { + .start = 0x60, + .end = 0x6f, + .name = "keyboard", + .flags = IORESOURCE_BUSY + }, { + .start = 0x80, + .end = 0x8f, + .name = "dma page reg", + .flags = IORESOURCE_BUSY + }, { + .start = 0xc0, + .end = 0xdf, + .name = "dma2", + .flags = IORESOURCE_BUSY + }, { + .start = 0xcfc, + .end = 0xcff, + .name = "PCI config data", + .flags = IORESOURCE_BUSY + } +}; + +static struct resource sni_mem_resource = { + .start = 0x10000000UL, + .end = 0xffffffffUL, + .name = "PCIMT PCI MEM", + .flags = IORESOURCE_MEM +}; + +/* + * The RM200/RM300 has a few holes in it's PCI/EISA memory address space used + * for other purposes. Be paranoid and allocate all of the before the PCI + * code gets a chance to to map anything else there ... + * + * This leaves the following areas available: + * + * 0x10000000 - 0x1009ffff (640kB) PCI/EISA/ISA Bus Memory + * 0x10100000 - 0x13ffffff ( 15MB) PCI/EISA/ISA Bus Memory + * 0x18000000 - 0x1fbfffff (124MB) PCI/EISA Bus Memory + * 0x1ff08000 - 0x1ffeffff (816kB) PCI/EISA Bus Memory + * 0xa0000000 - 0xffffffff (1.5GB) PCI/EISA Bus Memory + */ +static struct resource pcimt_mem_resources[] = { + { + .start = 0x100a0000, + .end = 0x100bffff, + .name = "Video RAM area", + .flags = IORESOURCE_BUSY + }, { + .start = 0x100c0000, + .end = 0x100fffff, + .name = "ISA Reserved", + .flags = IORESOURCE_BUSY + }, { + .start = 0x14000000, + .end = 0x17bfffff, + .name = "PCI IO", + .flags = IORESOURCE_BUSY + }, { + .start = 0x17c00000, + .end = 0x17ffffff, + .name = "Cache Replacement Area", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1a000000, + .end = 0x1a000003, + .name = "PCI INT Acknowledge", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1fc00000, + .end = 0x1fc7ffff, + .name = "Boot PROM", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1fc80000, + .end = 0x1fcfffff, + .name = "Diag PROM", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1fd00000, + .end = 0x1fdfffff, + .name = "X-Bus", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1fe00000, + .end = 0x1fefffff, + .name = "BIOS map", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1ff00000, + .end = 0x1ff7ffff, + .name = "NVRAM / EEPROM", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1fff0000, + .end = 0x1fffefff, + .name = "ASIC PCI", + .flags = IORESOURCE_BUSY + }, { + .start = 0x1ffff000, + .end = 0x1fffffff, + .name = "MP Agent", + .flags = IORESOURCE_BUSY + }, { + .start = 0x20000000, + .end = 0x9fffffff, + .name = "Main Memory", + .flags = IORESOURCE_BUSY + } +}; + +static void __init sni_pcimt_resource_init(void) +{ + int i; + + /* request I/O space for devices used on all i[345]86 PCs */ + for (i = 0; i < ARRAY_SIZE(pcimt_io_resources); i++) + request_resource(&ioport_resource, pcimt_io_resources + i); + + /* request mem space for pcimt-specific devices */ + for (i = 0; i < ARRAY_SIZE(pcimt_mem_resources); i++) + request_resource(&sni_mem_resource, pcimt_mem_resources + i); + + ioport_resource.end = sni_io_resource.end; +} + +extern struct pci_ops sni_pcimt_ops; + +static struct pci_controller sni_controller = { + .pci_ops = &sni_pcimt_ops, + .mem_resource = &sni_mem_resource, + .mem_offset = 0x10000000UL, + .io_resource = &sni_io_resource, + .io_offset = 0x00000000UL +}; + +static void enable_pcimt_irq(unsigned int irq) +{ + unsigned int mask = 1 << (irq - PCIMT_IRQ_INT2); + + *(volatile u8 *) PCIMT_IRQSEL |= mask; +} + +void disable_pcimt_irq(unsigned int irq) +{ + unsigned int mask = ~(1 << (irq - PCIMT_IRQ_INT2)); + + *(volatile u8 *) PCIMT_IRQSEL &= mask; +} + +static void end_pcimt_irq(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) + enable_pcimt_irq(irq); +} + +static struct irq_chip pcimt_irq_type = { + .typename = "PCIMT", + .ack = disable_pcimt_irq, + .mask = disable_pcimt_irq, + .mask_ack = disable_pcimt_irq, + .unmask = enable_pcimt_irq, + .end = end_pcimt_irq, +}; + +/* + * hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug + * button interrupts. Later ... + */ +static void pcimt_hwint0(void) +{ + panic("Received int0 but no handler yet ..."); +} + +/* + * hwint 1 deals with EISA and SCSI interrupts, + * + * The EISA_INT bit in CSITPEND is high active, all others are low active. + */ +static void pcimt_hwint1(void) +{ + u8 pend = *(volatile char *)PCIMT_CSITPEND; + unsigned long flags; + + if (pend & IT_EISA) { + int irq; + /* + * Note: ASIC PCI's builtin interrupt achknowledge feature is + * broken. Using it may result in loss of some or all i8259 + * interupts, so don't use PCIMT_INT_ACKNOWLEDGE ... + */ + irq = i8259_irq(); + if (unlikely(irq < 0)) + return; + + do_IRQ(irq); + } + + if (!(pend & IT_SCSI)) { + flags = read_c0_status(); + clear_c0_status(ST0_IM); + do_IRQ(PCIMT_IRQ_SCSI); + write_c0_status(flags); + } +} + +/* + * hwint 3 should deal with the PCI A - D interrupts, + */ +static void pcimt_hwint3(void) +{ + u8 pend = *(volatile char *)PCIMT_CSITPEND; + int irq; + + pend &= (IT_INTA | IT_INTB | IT_INTC | IT_INTD); + pend ^= (IT_INTA | IT_INTB | IT_INTC | IT_INTD); + clear_c0_status(IE_IRQ3); + irq = PCIMT_IRQ_INT2 + ffs(pend) - 1; + do_IRQ(irq); + set_c0_status(IE_IRQ3); +} + +static void sni_pcimt_hwint(void) +{ + u32 pending = (read_c0_cause() & read_c0_status()); + + if (pending & C_IRQ5) + do_IRQ (SNI_MIPS_IRQ_CPU_BASE + 7); + else if (pending & C_IRQ4) + do_IRQ (SNI_MIPS_IRQ_CPU_BASE + 6); + else if (pending & C_IRQ3) + pcimt_hwint3(); + else if (pending & C_IRQ1) + pcimt_hwint1(); + else if (pending & C_IRQ0) { + pcimt_hwint0(); + } +} + +void __init sni_pcimt_irq_init(void) +{ + int i; + + *(volatile u8 *) PCIMT_IRQSEL = IT_ETH | IT_EISA; + mips_cpu_irq_init(); + /* Actually we've got more interrupts to handle ... */ + for (i = PCIMT_IRQ_INT2; i <= PCIMT_IRQ_SCSI; i++) + set_irq_chip(i, &pcimt_irq_type); + sni_hwint = sni_pcimt_hwint; + change_c0_status(ST0_IM, IE_IRQ1|IE_IRQ3); +} + +void sni_pcimt_init(void) +{ + sni_pcimt_resource_init(); + sni_pcimt_detect(); + sni_pcimt_sc_init(); + rtc_mips_get_time = mc146818_get_cmos_time; + rtc_mips_set_time = mc146818_set_rtc_mmss; + board_time_init = sni_cpu_time_init; +#ifdef CONFIG_PCI + register_pci_controller(&sni_controller); +#endif +} + +static int __init snirm_pcimt_setup_devinit(void) +{ + switch (sni_brd_type) { + case SNI_BRD_PCI_MTOWER: + case SNI_BRD_PCI_DESKTOP: + case SNI_BRD_PCI_MTOWER_CPLUS: + platform_device_register(&pcimt_serial8250_device); + break; + } + + return 0; +} + +device_initcall(snirm_pcimt_setup_devinit); |