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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/parisc/superio.c
downloadlinux-linaro-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/parisc/superio.c')
-rw-r--r--drivers/parisc/superio.c508
1 files changed, 508 insertions, 0 deletions
diff --git a/drivers/parisc/superio.c b/drivers/parisc/superio.c
new file mode 100644
index 000000000000..e0efed796b92
--- /dev/null
+++ b/drivers/parisc/superio.c
@@ -0,0 +1,508 @@
+/* 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@onefishtwo.ca>
+ * (C) Copyright 2001 John Marvin <jsm fc hp com>
+ * (C) Copyright 2003 Grant Grundler <grundler parisc-linux org>
+ *
+ * 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/parport.h>
+#include <linux/parport_pc.h>
+#include <linux/termios.h>
+#include <linux/tty.h>
+#include <linux/serial_core.h>
+#include <linux/delay.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/superio.h>
+
+static struct superio_device sio_dev;
+
+
+#undef DEBUG_SUPERIO_INIT
+
+#ifdef DEBUG_SUPERIO_INIT
+#define DBG_INIT(x...) printk(x)
+#else
+#define DBG_INIT(x...)
+#endif
+
+static irqreturn_t
+superio_interrupt(int parent_irq, void *devp, struct pt_regs *regs)
+{
+ 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);
+
+ /*
+ * Bit 7: 1 = active Interrupt; 0 = no Interrupt pending
+ * Bits 6-3: zero
+ * Bits 2-0: highest priority, active requesting interrupt ID (0-7)
+ */
+ if ((results & 0x80) == 0) {
+ /* I suspect "spurious" interrupts are from unmasking an IRQ.
+ * We don't know if an interrupt was/is pending and thus
+ * just call the handler for that IRQ as if it were pending.
+ */
+ return IRQ_NONE;
+ }
+
+ /* 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");
+ return IRQ_HANDLED;
+ }
+
+ 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 IRQ_HANDLED;
+ }
+ }
+
+ /* Call the appropriate device's interrupt */
+ __do_IRQ(local_irq, regs);
+
+ /* set EOI - forces a new interrupt if a lower priority device
+ * still needs service.
+ */
+ outb((OCW2_SEOI|local_irq),IC_PIC1 + 0);
+ return IRQ_HANDLED;
+}
+
+/* Initialize Super I/O device */
+
+static void __devinit
+superio_init(struct superio_device *sio)
+{
+ struct pci_dev *pdev = sio->lio_pdev;
+ u16 word;
+
+ if (sio->suckyio_irq_enabled)
+ return;
+
+ if (!pdev) BUG();
+ if (!sio->usb_pdev) BUG();
+
+ /* use the IRQ iosapic found for USB INT D... */
+ pdev->irq = sio->usb_pdev->irq;
+
+ /* ...then properly fixup the USB to point at suckyio PIC */
+ sio->usb_pdev->irq = superio_fixup_irq(sio->usb_pdev);
+
+ printk (KERN_INFO "SuperIO: Found NS87560 Legacy I/O device at %s (IRQ %i) \n",
+ pci_name(pdev),pdev->irq);
+
+ pci_read_config_dword (pdev, SIO_SP1BAR, &sio->sp1_base);
+ sio->sp1_base &= ~1;
+ printk (KERN_INFO "SuperIO: Serial port 1 at 0x%x\n", sio->sp1_base);
+
+ pci_read_config_dword (pdev, SIO_SP2BAR, &sio->sp2_base);
+ sio->sp2_base &= ~1;
+ printk (KERN_INFO "SuperIO: Serial port 2 at 0x%x\n", sio->sp2_base);
+
+ pci_read_config_dword (pdev, SIO_PPBAR, &sio->pp_base);
+ sio->pp_base &= ~1;
+ printk (KERN_INFO "SuperIO: Parallel port at 0x%x\n", sio->pp_base);
+
+ pci_read_config_dword (pdev, SIO_FDCBAR, &sio->fdc_base);
+ sio->fdc_base &= ~1;
+ printk (KERN_INFO "SuperIO: Floppy controller at 0x%x\n", sio->fdc_base);
+ pci_read_config_dword (pdev, SIO_ACPIBAR, &sio->acpi_base);
+ sio->acpi_base &= ~1;
+ printk (KERN_INFO "SuperIO: ACPI at 0x%x\n", 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);
+ pci_enable_device(pdev);
+
+ /*
+ * Next project is programming the onboard interrupt controllers.
+ * PDC hasn't done this for us, since it's using polled I/O.
+ *
+ * XXX Use dword writes to avoid bugs in Elroy or Suckyio Config
+ * space access. PCI is by nature a 32-bit bus and config
+ * space can be sensitive to that.
+ */
+
+ /* 0x64 - 0x67 :
+ DMA Rtg 2
+ DMA Rtg 3
+ DMA Chan Ctl
+ TRIGGER_1 == 0x82 USB & IDE level triggered, rest to edge
+ */
+ pci_write_config_dword (pdev, 0x64, 0x82000000U);
+
+ /* 0x68 - 0x6b :
+ TRIGGER_2 == 0x00 all edge triggered (not used)
+ CFG_IR_SER == 0x43 SerPort1 = IRQ3, SerPort2 = IRQ4
+ CFG_IR_PF == 0x65 ParPort = IRQ5, FloppyCtlr = IRQ6
+ CFG_IR_IDE == 0x07 IDE1 = IRQ7, reserved
+ */
+ pci_write_config_dword (pdev, TRIGGER_2, 0x07654300U);
+
+ /* 0x6c - 0x6f :
+ CFG_IR_INTAB == 0x00
+ CFG_IR_INTCD == 0x10 USB = IRQ1
+ CFG_IR_PS2 == 0x00
+ CFG_IR_FXBUS == 0x00
+ */
+ pci_write_config_dword (pdev, CFG_IR_INTAB, 0x00001000U);
+
+ /* 0x70 - 0x73 :
+ CFG_IR_USB == 0x00 not used. USB is connected to INTD.
+ CFG_IR_ACPI == 0x00 not used.
+ DMA Priority == 0x4c88 Power on default value. NFC.
+ */
+ pci_write_config_dword (pdev, CFG_IR_USB, 0x4c880000U);
+
+ /* PIC1 Initialization Command Word register programming */
+ outb (0x11,IC_PIC1+0); /* ICW1: ICW4 write req | ICW1 */
+ outb (0x00,IC_PIC1+1); /* ICW2: interrupt vector table - not used */
+ 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);
+
+ /* 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 enabled\n");
+ else
+ printk(KERN_ERR "USB regulator not initialized!\n");
+
+ if (request_irq(pdev->irq, superio_interrupt, SA_INTERRUPT,
+ "SuperIO", (void *)sio)) {
+
+ printk(KERN_ERR "SuperIO: could not get irq\n");
+ BUG();
+ return;
+ }
+
+ sio->suckyio_irq_enabled = 1;
+}
+
+
+static void superio_disable_irq(unsigned int irq)
+{
+ u8 r8;
+
+ if ((irq < 1) || (irq == 2) || (irq > 7)) {
+ printk(KERN_ERR "SuperIO: Illegal irq number.\n");
+ BUG();
+ return;
+ }
+
+ /* Mask interrupt */
+
+ r8 = inb(IC_PIC1+1);
+ r8 |= (1 << irq);
+ outb (r8,IC_PIC1+1);
+}
+
+static void superio_enable_irq(unsigned int irq)
+{
+ u8 r8;
+
+ if ((irq < 1) || (irq == 2) || (irq > 7)) {
+ printk(KERN_ERR "SuperIO: Illegal irq number (%d).\n", irq);
+ BUG();
+ return;
+ }
+
+ /* Unmask interrupt */
+ r8 = inb(IC_PIC1+1);
+ r8 &= ~(1 << irq);
+ outb (r8,IC_PIC1+1);
+}
+
+static unsigned int superio_startup_irq(unsigned int irq)
+{
+ superio_enable_irq(irq);
+ return 0;
+}
+
+static struct hw_interrupt_type superio_interrupt_type = {
+ .typename = "SuperIO",
+ .startup = superio_startup_irq,
+ .shutdown = superio_disable_irq,
+ .enable = superio_enable_irq,
+ .disable = superio_disable_irq,
+ .ack = no_ack_irq,
+ .end = no_end_irq,
+};
+
+#ifdef DEBUG_SUPERIO_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, i;
+
+#ifdef DEBUG_SUPERIO_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 %p\n",
+ pci_name(pcidev),
+ pcidev->vendor, pcidev->device,
+ __builtin_return_address(0));
+#endif
+
+ for (i = 0; i < 16; i++) {
+ irq_desc[i].handler = &superio_interrupt_type;
+ }
+
+ /*
+ * 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 superio_init() */
+ return -1;
+ case PCI_DEVICE_ID_NS_87560_USB: /* Function 2 */
+ sio_dev.usb_pdev = pcidev; /* save for superio_init() */
+ local_irq = USB_IRQ;
+ break;
+ default:
+ local_irq = -1;
+ BUG();
+ break;
+ }
+
+ return local_irq;
+}
+
+static struct uart_port serial[] = {
+ {
+ .iotype = UPIO_PORT,
+ .line = 0,
+ .type = PORT_16550A,
+ .uartclk = 115200*16,
+ .fifosize = 16,
+ },
+ {
+ .iotype = UPIO_PORT,
+ .line = 1,
+ .type = PORT_16550A,
+ .uartclk = 115200*16,
+ .fifosize = 16,
+ }
+};
+
+static void __devinit superio_serial_init(void)
+{
+#ifdef CONFIG_SERIAL_8250
+ int retval;
+
+ serial[0].iobase = sio_dev.sp1_base;
+ serial[0].irq = SP1_IRQ;
+
+ retval = early_serial_setup(&serial[0]);
+ if (retval < 0) {
+ printk(KERN_WARNING "SuperIO: Register Serial #0 failed.\n");
+ return;
+ }
+
+ serial[1].iobase = sio_dev.sp2_base;
+ serial[1].irq = SP2_IRQ;
+ retval = early_serial_setup(&serial[1]);
+
+ if (retval < 0)
+ printk(KERN_WARNING "SuperIO: Register Serial #1 failed.\n");
+#endif /* CONFIG_SERIAL_8250 */
+}
+
+
+static void __devinit superio_parport_init(void)
+{
+#ifdef CONFIG_PARPORT_PC
+ if (!parport_pc_probe_port(sio_dev.pp_base,
+ 0 /*base_hi*/,
+ PAR_IRQ,
+ PARPORT_DMA_NONE /* dma */,
+ NULL /*struct pci_dev* */) )
+
+ printk(KERN_WARNING "SuperIO: Probing parallel port failed.\n");
+#endif /* CONFIG_PARPORT_PC */
+}
+
+
+static void superio_fixup_pci(struct pci_dev *pdev)
+{
+ u8 prog;
+
+ pdev->class |= 0x5;
+ pci_write_config_byte(pdev, PCI_CLASS_PROG, pdev->class);
+
+ pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
+ printk("PCI: Enabled native mode for NS87415 (pif=0x%x)\n", prog);
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87415, superio_fixup_pci);
+
+
+static int __devinit superio_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+
+ /*
+ ** 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
+ */
+ DBG_INIT("superio_probe(%s) ven 0x%x dev 0x%x sv 0x%x sd 0x%x class 0x%x\n",
+ pci_name(dev),
+ dev->vendor, dev->device,
+ dev->subsystem_vendor, dev->subsystem_device,
+ dev->class);
+
+ superio_init(&sio_dev);
+
+ if (dev->device == PCI_DEVICE_ID_NS_87560_LIO) { /* Function 1 */
+ superio_parport_init();
+ superio_serial_init();
+ /* REVISIT XXX : superio_fdc_init() ? */
+ return 0;
+ } else if (dev->device == PCI_DEVICE_ID_NS_87415) { /* Function 0 */
+ DBG_INIT("superio_probe: ignoring IDE 87415\n");
+ } else if (dev->device == PCI_DEVICE_ID_NS_87560_USB) { /* Function 2 */
+ DBG_INIT("superio_probe: ignoring USB OHCI controller\n");
+ } else {
+ DBG_INIT("superio_probe: WTF? Fire Extinguisher?\n");
+ }
+
+ /* Let appropriate other driver claim this device. */
+ return -ENODEV;
+}
+
+static struct pci_device_id superio_tbl[] = {
+ { 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_register_driver(&superio_driver);
+}
+
+static void __exit superio_exit(void)
+{
+ pci_unregister_driver(&superio_driver);
+}
+
+
+module_init(superio_modinit);
+module_exit(superio_exit);