Initial import

1 files changed, 498 insertions, 0 deletions

diff --git a/drivers/parisc/superio.c b/drivers/parisc/superio.c
new file mode 100644
index 000000000..deeaed544
--- /dev/null
+++ b/drivers/parisc/superio.c
@@ -0,0 +1,498 @@
+/*      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>
+ *	(C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
+ *	(C) Copyright 2006 Helge Deller <deller@gmx.de>
+ *
+ *	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>
+ *
+ *	Converted superio_init() to be a PCI_FIXUP_FINAL callee.
+ *         -- Kyle McMartin <kyle@parisc-linux.org>
+ */
+
+
+/* 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/serial_8250.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
+
+#define SUPERIO	"SuperIO"
+#define PFX	SUPERIO ": "
+
+static irqreturn_t
+superio_interrupt(int parent_irq, void *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);
+
+	/*
+	 * 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 PFX "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 PFX "spurious interrupt!\n");
+			return IRQ_HANDLED;
+		}
+	}
+
+	/* Call the appropriate device's interrupt */
+	generic_handle_irq(local_irq);
+
+	/* 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
+superio_init(struct pci_dev *pcidev)
+{
+	struct superio_device *sio = &sio_dev;
+	struct pci_dev *pdev = sio->lio_pdev;
+	u16 word;
+	int ret;
+
+	if (sio->suckyio_irq_enabled)
+		return;
+
+	BUG_ON(!pdev);
+	BUG_ON(!sio->usb_pdev);
+
+	/* 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 PFX "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 PFX "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 PFX "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 PFX "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 PFX "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 PFX "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);
+	ret = pci_enable_device(pdev);
+	BUG_ON(ret < 0);	/* not too much we can do about this... */
+
+	/*
+	 * 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 PFX "USB regulator enabled\n");
+	else
+		printk(KERN_ERR PFX "USB regulator not initialized!\n");
+
+	if (request_irq(pdev->irq, superio_interrupt, 0,
+			SUPERIO, (void *)sio)) {
+
+		printk(KERN_ERR PFX "could not get irq\n");
+		BUG();
+		return;
+	}
+
+	sio->suckyio_irq_enabled = 1;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87560_LIO, superio_init);
+
+static void superio_mask_irq(struct irq_data *d)
+{
+	unsigned int irq = d->irq;
+	u8 r8;
+
+	if ((irq < 1) || (irq == 2) || (irq > 7)) {
+		printk(KERN_ERR PFX "Illegal irq number.\n");
+		BUG();
+		return;
+	}
+
+	/* Mask interrupt */
+
+	r8 = inb(IC_PIC1+1);
+	r8 |= (1 << irq);
+	outb (r8,IC_PIC1+1);
+}
+
+static void superio_unmask_irq(struct irq_data *d)
+{
+	unsigned int irq = d->irq;
+	u8 r8;
+
+	if ((irq < 1) || (irq == 2) || (irq > 7)) {
+		printk(KERN_ERR PFX "Illegal irq number (%d).\n", irq);
+		BUG();
+		return;
+	}
+
+	/* Unmask interrupt */
+	r8 = inb(IC_PIC1+1);
+	r8 &= ~(1 << irq);
+	outb (r8,IC_PIC1+1);
+}
+
+static struct irq_chip superio_interrupt_type = {
+	.name		=	SUPERIO,
+	.irq_unmask	=	superio_unmask_irq,
+	.irq_mask	=	superio_mask_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(KERN_DEBUG "superio_fixup_irq(%s) ven 0x%x dev 0x%x from %ps\n",
+		pci_name(pcidev),
+		pcidev->vendor, pcidev->device,
+		__builtin_return_address(0));
+#endif
+
+	for (i = 0; i < 16; i++) {
+		irq_set_chip_and_handler(i, &superio_interrupt_type,
+					 handle_simple_irq);
+	}
+
+	/*
+	 * 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 void __init superio_serial_init(void)
+{
+#ifdef CONFIG_SERIAL_8250
+	int retval;
+	struct uart_port serial_port;
+
+	memset(&serial_port, 0, sizeof(serial_port));
+	serial_port.iotype	= UPIO_PORT;
+	serial_port.type	= PORT_16550A;
+	serial_port.uartclk	= 115200*16;
+	serial_port.flags	= UPF_FIXED_PORT | UPF_FIXED_TYPE |
+				  UPF_BOOT_AUTOCONF;
+
+	/* serial port #1 */
+	serial_port.iobase	= sio_dev.sp1_base;
+	serial_port.irq		= SP1_IRQ;
+	serial_port.line	= 0;
+	retval = early_serial_setup(&serial_port);
+	if (retval < 0) {
+		printk(KERN_WARNING PFX "Register Serial #0 failed.\n");
+		return;
+	}
+
+	/* serial port #2 */
+	serial_port.iobase	= sio_dev.sp2_base;
+	serial_port.irq		= SP2_IRQ;
+	serial_port.line	= 1;
+	retval = early_serial_setup(&serial_port);
+	if (retval < 0)
+		printk(KERN_WARNING PFX "Register Serial #1 failed.\n");
+#endif /* CONFIG_SERIAL_8250 */
+}
+
+
+static void __init 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* */,
+			0 /* shared irq flags */))
+
+		printk(KERN_WARNING PFX "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 __init
+superio_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct superio_device *sio = &sio_dev;
+
+	/*
+	** 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);
+
+	BUG_ON(!sio->suckyio_irq_enabled);	/* Enabled by PCI_FIXUP_FINAL */
+
+	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 const struct pci_device_id superio_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87560_LIO) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87560_USB) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87415) },
+	{ 0, }
+};
+
+static struct pci_driver superio_driver = {
+	.name =         SUPERIO,
+	.id_table =     superio_tbl,
+	.probe =        superio_probe,
+};
+
+module_pci_driver(superio_driver);