superio.c
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上传日期:2013-04-10
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文件大小:14k
- /* National Semiconductor NS87560UBD Super I/O controller used in
- * HP [BCJ]x000 workstations.
- *
- * This chip is a horrid piece of engineering, and National
- * denies any knowledge of its existence. Thus no datasheet is
- * available off www.national.com.
- *
- * (C) Copyright 2000 Linuxcare, Inc.
- * (C) Copyright 2000 Linuxcare Canada, Inc.
- * (C) Copyright 2000 Martin K. Petersen <mkp@linuxcare.com>
- * (C) Copyright 2000 Alex deVries <alex@linuxcare.com>
- * (C) Copyright 2001 John Marvin <jsm@fc.hp.com>
- *
- * 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.
- *
- * The initial version of this is by Martin Peterson. Alex deVries
- * has spent a bit of time trying to coax it into working.
- *
- * Major changes to get basic interrupt infrastructure working to
- * hopefully be able to support all SuperIO devices. Currently
- * works with serial. -- John Marvin <jsm@fc.hp.com>
- */
- /* NOTES:
- *
- * Function 0 is an IDE controller. It is identical to a PC87415 IDE
- * controller (and identifies itself as such).
- *
- * Function 1 is a "Legacy I/O" controller. Under this function is a
- * whole mess of legacy I/O peripherals. Of course, HP hasn't enabled
- * all the functionality in hardware, but the following is available:
- *
- * Two 16550A compatible serial controllers
- * An IEEE 1284 compatible parallel port
- * A floppy disk controller
- *
- * Function 2 is a USB controller.
- *
- * We must be incredibly careful during initialization. Since all
- * interrupts are routed through function 1 (which is not allowed by
- * the PCI spec), we need to program the PICs on the legacy I/O port
- * *before* we attempt to set up IDE and USB. @#$!&
- *
- * According to HP, devices are only enabled by firmware if they have
- * a physical device connected.
- *
- * Configuration register bits:
- * 0x5A: FDC, SP1, IDE1, SP2, IDE2, PAR, Reserved, P92
- * 0x5B: RTC, 8259, 8254, DMA1, DMA2, KBC, P61, APM
- *
- */
- #include <linux/errno.h>
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/interrupt.h>
- #include <linux/ioport.h>
- #include <linux/serial.h>
- #include <linux/pci.h>
- #include <linux/ioport.h>
- #include <linux/parport.h>
- #include <linux/parport_pc.h>
- #include <linux/serial_reg.h>
- #include <asm/io.h>
- #include <asm/hardware.h>
- #include <asm/gsc.h>
- #include <asm/irq.h>
- #include <asm/superio.h>
- static struct superio_device sio_dev = {
- iosapic_irq: -1
- };
- #undef DEBUG_INIT
- void
- superio_inform_irq(int irq)
- {
- if (sio_dev.iosapic_irq != -1) {
- printk(KERN_ERR "SuperIO: superio_inform_irq called twice! (more than one SuperIO?)n");
- BUG();
- return;
- }
- sio_dev.iosapic_irq = irq;
- }
- static void
- superio_interrupt(int irq, void *devp, struct pt_regs *regs)
- {
- struct superio_device *sio = (struct superio_device *)devp;
- u8 results;
- u8 local_irq;
- /* Poll the 8259 to see if there's an interrupt. */
- outb (OCW3_POLL,IC_PIC1+0);
- results = inb(IC_PIC1+0);
- if ((results & 0x80) == 0) {
- #ifndef CONFIG_SMP
- /* HACK: need to investigate why this happens if SMP enabled */
- BUG(); /* This shouldn't happen */
- #endif
- return;
- }
- /* Check to see which device is interrupting */
- local_irq = results & 0x0f;
- if (local_irq == 2 || local_irq > 7) {
- printk(KERN_ERR "SuperIO: slave interrupted!n");
- BUG();
- return;
- }
- if (local_irq == 7) {
- /* Could be spurious. Check in service bits */
- outb(OCW3_ISR,IC_PIC1+0);
- results = inb(IC_PIC1+0);
- if ((results & 0x80) == 0) { /* if ISR7 not set: spurious */
- printk(KERN_WARNING "SuperIO: spurious interrupt!n");
- return;
- }
- }
- /* Call the appropriate device's interrupt */
- do_irq(&sio->irq_region->action[local_irq],
- sio->irq_region->data.irqbase + local_irq,
- regs);
- /* set EOI */
- outb((OCW2_SEOI|local_irq),IC_PIC1 + 0);
- return;
- }
- /* Initialize Super I/O device */
- static void __devinit
- superio_init(struct superio_device *sio)
- {
- struct pci_dev *pdev = sio->lio_pdev;
- u16 word;
- u8 i;
- if (!pdev || sio->iosapic_irq == -1) {
- printk(KERN_ERR "All SuperIO functions not found!n");
- BUG();
- return;
- }
- printk (KERN_INFO "SuperIO: Found NS87560 Legacy I/O device at %s (IRQ %i) n",
- pdev->slot_name,sio->iosapic_irq);
- /* Find our I/O devices */
- pci_read_config_word (pdev, SIO_SP1BAR, &sio->sp1_base);
- sio->sp1_base &= ~1;
- printk (KERN_INFO "SuperIO: Serial port 1 at 0x%xn", sio->sp1_base);
- pci_read_config_word (pdev, SIO_SP2BAR, &sio->sp2_base);
- sio->sp2_base &= ~1;
- printk (KERN_INFO "SuperIO: Serial port 2 at 0x%xn", sio->sp2_base);
- pci_read_config_word (pdev, SIO_PPBAR, &sio->pp_base);
- sio->pp_base &= ~1;
- printk (KERN_INFO "SuperIO: Parallel port at 0x%xn", sio->pp_base);
- pci_read_config_word (pdev, SIO_FDCBAR, &sio->fdc_base);
- sio->fdc_base &= ~1;
- printk (KERN_INFO "SuperIO: Floppy controller at 0x%xn", sio->fdc_base);
- pci_read_config_word (pdev, SIO_ACPIBAR, &sio->acpi_base);
- sio->acpi_base &= ~1;
- printk (KERN_INFO "SuperIO: ACPI at 0x%xn", sio->acpi_base);
- request_region (IC_PIC1, 0x1f, "pic1");
- request_region (IC_PIC2, 0x1f, "pic2");
- request_region (sio->acpi_base, 0x1f, "acpi");
- /* Enable the legacy I/O function */
- pci_read_config_word (pdev, PCI_COMMAND, &word);
- word |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY | PCI_COMMAND_IO;
- pci_write_config_word (pdev, PCI_COMMAND, word);
- pci_set_master (pdev);
- /* Next project is programming the onboard interrupt
- * controllers. PDC hasn't done this for us, since it's using
- * polled I/O.
- */
- /* Set PIC interrupts to edge triggered */
- pci_write_config_byte (pdev, TRIGGER_1, 0x0);
- pci_write_config_byte (pdev, TRIGGER_2, 0x0);
- /* Disable all interrupt routing */
- for (i = IR_LOW ; i < IR_HIGH ; i++)
- pci_write_config_byte (pdev, i, 0x0);
- /* PIC1 Initialization Command Word register programming */
- outb (0x11,IC_PIC1+0); /* ICW1: ICW4 write req | ICW1 */
- outb (0x00,IC_PIC1+1); /* ICW2: N/A */
- outb (0x04,IC_PIC1+1); /* ICW3: Cascade */
- outb (0x01,IC_PIC1+1); /* ICW4: x86 mode */
- /* PIC1 Program Operational Control Words */
- outb (0xff,IC_PIC1+1); /* OCW1: Mask all interrupts */
- outb (0xc2,IC_PIC1+0); /* OCW2: priority (3-7,0-2) */
- /* PIC2 Initialization Command Word register programming */
- outb (0x11,IC_PIC2+0); /* ICW1: ICW4 write req | ICW1 */
- outb (0x00,IC_PIC2+1); /* ICW2: N/A */
- outb (0x02,IC_PIC2+1); /* ICW3: Slave ID code */
- outb (0x01,IC_PIC2+1); /* ICW4: x86 mode */
-
- /* Program Operational Control Words */
- outb (0xff,IC_PIC1+1); /* OCW1: Mask all interrupts */
- outb (0x68,IC_PIC1+0); /* OCW3: OCW3 select | ESMM | SMM */
- /* Write master mask reg */
- outb (0xff,IC_PIC1+1);
- /* Set up interrupt routing */
- pci_write_config_byte (pdev, IR_USB, 0x10); /* USB on IRQ1 */
- pci_write_config_byte (pdev, IR_SER, 0x43); /* SP1 on IRQ3, SP2 on IRQ4 */
- pci_write_config_byte (pdev, IR_PFD, 0x65); /* PAR on IRQ5, FDC on IRQ6 */
- pci_write_config_byte (pdev, IR_IDE, 0x07); /* IDE1 on IRQ7 */
-
- /* Set USB and IDE to level triggered interrupts, rest to edge */
- pci_write_config_byte (pdev, TRIGGER_1, 0x82); /* IRQ 1 and 7 */
- /* Setup USB power regulation */
- outb(1, sio->acpi_base + USB_REG_CR);
- if (inb(sio->acpi_base + USB_REG_CR) & 1)
- printk(KERN_INFO "SuperIO: USB regulator enabledn");
- else
- printk(KERN_ERR "USB regulator not initialized!n");
- pci_enable_device(pdev);
- if (request_irq(sio->iosapic_irq,superio_interrupt,SA_INTERRUPT,
- "SuperIO",(void *)sio)) {
- printk(KERN_ERR "SuperIO: could not get irqn");
- BUG();
- return;
- }
- sio->iosapic_irq_enabled = 1;
-
- }
- static void
- superio_disable_irq(void *dev, int local_irq)
- {
- u8 r8;
- if ((local_irq < 1) || (local_irq == 2) || (local_irq > 7)) {
- printk(KERN_ERR "SuperIO: Illegal irq number.n");
- BUG();
- return;
- }
- /* Mask interrupt */
- r8 = inb(IC_PIC1+1);
- r8 |= (1 << local_irq);
- outb (r8,IC_PIC1+1);
- }
- static void
- superio_enable_irq(void *dev, int local_irq)
- {
- struct superio_device *sio = (struct superio_device *)dev;
- u8 r8;
- if ((local_irq < 1) || (local_irq == 2) || (local_irq > 7)) {
- printk(KERN_ERR "SuperIO: Illegal irq number.n");
- BUG();
- return;
- }
- /*
- * It's possible that we haven't initialized the legacy IO
- * function yet. If not, do it now.
- */
- if (!sio->iosapic_irq_enabled)
- superio_init(sio);
- /* Unmask interrupt */
- r8 = inb(IC_PIC1+1);
- r8 &= ~(1 << local_irq);
- outb (r8,IC_PIC1+1);
- }
- static void
- superio_mask_irq(void *dev, int local_irq)
- {
- BUG();
- }
- static void
- superio_unmask_irq(void *dev, int local_irq)
- {
- BUG();
- }
- static struct irq_region_ops superio_irq_ops = {
- disable_irq: superio_disable_irq,
- enable_irq: superio_enable_irq,
- mask_irq: superio_mask_irq,
- unmask_irq: superio_unmask_irq
- };
- #ifdef DEBUG_INIT
- static unsigned short expected_device[3] = {
- PCI_DEVICE_ID_NS_87415,
- PCI_DEVICE_ID_NS_87560_LIO,
- PCI_DEVICE_ID_NS_87560_USB
- };
- #endif
- int superio_fixup_irq(struct pci_dev *pcidev)
- {
- int local_irq;
- #ifdef DEBUG_INIT
- int fn;
- fn = PCI_FUNC(pcidev->devfn);
- /* Verify the function number matches the expected device id. */
- if (expected_device[fn] != pcidev->device) {
- BUG();
- return -1;
- }
- printk("superio_fixup_irq(%s) ven 0x%x dev 0x%x from %pn",
- pcidev->slot_name,
- pcidev->vendor, pcidev->device,
- __builtin_return_address(0));
- #endif
- if (!sio_dev.irq_region) {
- /* Allocate an irq region for SuperIO devices */
- sio_dev.irq_region = alloc_irq_region(SUPERIO_NIRQS,
- &superio_irq_ops,
- "SuperIO", (void *) &sio_dev);
- if (!sio_dev.irq_region) {
- printk(KERN_WARNING "SuperIO: alloc_irq_region failedn");
- return -1;
- }
- }
- /*
- * We don't allocate a SuperIO irq for the legacy IO function,
- * since it is a "bridge". Instead, we will allocate irq's for
- * each legacy device as they are initialized.
- */
- switch(pcidev->device) {
- case PCI_DEVICE_ID_NS_87415: /* Function 0 */
- local_irq = IDE_IRQ;
- break;
- case PCI_DEVICE_ID_NS_87560_LIO: /* Function 1 */
- sio_dev.lio_pdev = pcidev; /* save for later initialization */
- return -1;
- case PCI_DEVICE_ID_NS_87560_USB: /* Function 2 */
- local_irq = USB_IRQ;
- break;
- default:
- local_irq = -1;
- BUG();
- break;
- }
- return(sio_dev.irq_region->data.irqbase + local_irq);
- }
- void __devinit
- superio_serial_init(void)
- {
- #ifdef CONFIG_SERIAL
- struct serial_struct *serial;
- int retval;
-
- if (!sio_dev.irq_region)
- return; /* superio not present */
- if (!sio_dev.iosapic_irq_enabled)
- superio_init(&sio_dev);
- serial = kmalloc(2 * sizeof (struct serial_struct), GFP_KERNEL);
- if (!serial) {
- printk(KERN_WARNING "SuperIO: Could not get memory for serial struct.n");
- return;
- }
- memset(serial, 0, 2 * sizeof (struct serial_struct));
- serial->type = PORT_16550A;
- serial->line = 0;
- serial->port = sio_dev.sp1_base;
- serial->port_high = 0;
- serial->irq = sio_dev.irq_region->data.irqbase + SP1_IRQ;
- serial->io_type = SERIAL_IO_PORT;
- serial->flags = 0;
- serial->xmit_fifo_size = 16;
- serial->custom_divisor = 0;
- serial->baud_base = 115200;
- retval = register_serial(serial);
- if (retval < 0) {
- printk(KERN_WARNING "SuperIO: Register Serial #0 failed.n");
- kfree (serial);
- return;
- }
- serial++;
- serial->type = PORT_16550A;
- serial->line = 1;
- serial->port = sio_dev.sp2_base;
- serial->port_high = 0;
- serial->irq = sio_dev.irq_region->data.irqbase + SP2_IRQ;
- serial->io_type = SERIAL_IO_PORT;
- serial->flags = 0;
- serial->xmit_fifo_size = 16;
- serial->custom_divisor = 0;
- serial->baud_base = 115200;
- retval = register_serial(serial);
- if (retval < 0)
- printk(KERN_WARNING "SuperIO: Register Serial #1 failed.n");
- #endif /* CONFIG_SERIAL */
- }
- EXPORT_SYMBOL(superio_serial_init);
- #ifdef CONFIG_PARPORT_PC
- void __devinit
- superio_parport_init(void)
- {
- if (!sio_dev.irq_region)
- return; /* superio not present */
- if (!sio_dev.iosapic_irq_enabled)
- superio_init(&sio_dev);
- if (!parport_pc_probe_port(sio_dev.pp_base,
- 0 /*base_hi*/,
- sio_dev.irq_region->data.irqbase + PAR_IRQ,
- PARPORT_DMA_NONE /* dma */,
- NULL /*struct pci_dev* */))
- printk(KERN_WARNING "SuperIO: Probing parallel port failed.n");
- }
- EXPORT_SYMBOL(superio_parport_init);
- #endif /* CONFIG_PARPORT_PC */
- int
- superio_get_ide_irq(void)
- {
- if (sio_dev.irq_region)
- return sio_dev.irq_region->data.irqbase + IDE_IRQ;
- else
- return 0;
- }
- EXPORT_SYMBOL(superio_get_ide_irq);
- static int __devinit superio_probe(struct pci_dev *dev, const struct pci_device_id *id)
- {
- #ifdef DEBUG_INIT
- printk("superio_probe(%s) ven 0x%x dev 0x%x sv 0x%x sd 0x%x class 0x%xn",
- dev->slot_name,
- dev->vendor, dev->device,
- dev->subsystem_vendor, dev->subsystem_device,
- dev->class);
- /*
- ** superio_probe(00:0e.0) ven 0x100b dev 0x2 sv 0x0 sd 0x0 class 0x1018a
- ** superio_probe(00:0e.1) ven 0x100b dev 0xe sv 0x0 sd 0x0 class 0x68000
- ** superio_probe(00:0e.2) ven 0x100b dev 0x12 sv 0x0 sd 0x0 class 0xc0310
- */
- #endif
- /* superio_fixup_irq(dev); */
- if (dev->device == PCI_DEVICE_ID_NS_87560_LIO) {
- #ifdef CONFIG_PARPORT_PC
- superio_parport_init();
- #endif
- /* Don't call superio_serial_init() - see rs_init() */
- /* REVISIT : superio_fdc_init() ? */
- return 0;
- }
- else
- {
- /* don't claim this device; let whatever either driver
- * do it
- */
- return -1;
- }
- }
- static struct pci_device_id superio_tbl[] __devinitdata = {
- { PCI_VENDOR_ID_NS, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
- { 0, }
- };
- static struct pci_driver superio_driver = {
- name: "SuperIO",
- id_table: superio_tbl,
- probe: superio_probe,
- };
- static int __init superio_modinit(void)
- {
- return pci_module_init(&superio_driver);
- }
- static void __exit superio_exit(void)
- {
- pci_unregister_driver(&superio_driver);
- }
- module_init(superio_modinit);
- module_exit(superio_exit);