1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* National Semiconductor NS87560UBD Super I/O controller used in
3 * HP [BCJ]x000 workstations.
5 * This chip is a horrid piece of engineering, and National
6 * denies any knowledge of its existence. Thus no datasheet is
7 * available off www.national.com.
9 * (C) Copyright 2000 Linuxcare, Inc.
10 * (C) Copyright 2000 Linuxcare Canada, Inc.
11 * (C) Copyright 2000 Martin K. Petersen <mkp@linuxcare.com>
12 * (C) Copyright 2000 Alex deVries <alex@onefishtwo.ca>
13 * (C) Copyright 2001 John Marvin <jsm fc hp com>
14 * (C) Copyright 2003 Grant Grundler <grundler parisc-linux org>
15 * (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
16 * (C) Copyright 2006 Helge Deller <deller@gmx.de>
18 * The initial version of this is by Martin Peterson. Alex deVries
19 * has spent a bit of time trying to coax it into working.
21 * Major changes to get basic interrupt infrastructure working to
22 * hopefully be able to support all SuperIO devices. Currently
23 * works with serial. -- John Marvin <jsm@fc.hp.com>
25 * Converted superio_init() to be a PCI_FIXUP_FINAL callee.
26 * -- Kyle McMartin <kyle@parisc-linux.org>
32 * Function 0 is an IDE controller. It is identical to a PC87415 IDE
33 * controller (and identifies itself as such).
35 * Function 1 is a "Legacy I/O" controller. Under this function is a
36 * whole mess of legacy I/O peripherals. Of course, HP hasn't enabled
37 * all the functionality in hardware, but the following is available:
39 * Two 16550A compatible serial controllers
40 * An IEEE 1284 compatible parallel port
41 * A floppy disk controller
43 * Function 2 is a USB controller.
45 * We must be incredibly careful during initialization. Since all
46 * interrupts are routed through function 1 (which is not allowed by
47 * the PCI spec), we need to program the PICs on the legacy I/O port
48 * *before* we attempt to set up IDE and USB. @#$!&
50 * According to HP, devices are only enabled by firmware if they have
51 * a physical device connected.
53 * Configuration register bits:
54 * 0x5A: FDC, SP1, IDE1, SP2, IDE2, PAR, Reserved, P92
55 * 0x5B: RTC, 8259, 8254, DMA1, DMA2, KBC, P61, APM
59 #include <linux/errno.h>
60 #include <linux/init.h>
61 #include <linux/module.h>
62 #include <linux/types.h>
63 #include <linux/interrupt.h>
64 #include <linux/ioport.h>
65 #include <linux/serial.h>
66 #include <linux/pci.h>
67 #include <linux/parport.h>
68 #include <linux/parport_pc.h>
69 #include <linux/termios.h>
70 #include <linux/tty.h>
71 #include <linux/serial_core.h>
72 #include <linux/serial_8250.h>
73 #include <linux/delay.h>
76 #include <asm/hardware.h>
77 #include <asm/superio.h>
79 static struct superio_device sio_dev;
82 #undef DEBUG_SUPERIO_INIT
84 #ifdef DEBUG_SUPERIO_INIT
85 #define DBG_INIT(x...) printk(x)
87 #define DBG_INIT(x...)
90 #define SUPERIO "SuperIO"
91 #define PFX SUPERIO ": "
94 superio_interrupt(int parent_irq, void *devp)
99 /* Poll the 8259 to see if there's an interrupt. */
100 outb (OCW3_POLL,IC_PIC1+0);
102 results = inb(IC_PIC1+0);
105 * Bit 7: 1 = active Interrupt; 0 = no Interrupt pending
107 * Bits 2-0: highest priority, active requesting interrupt ID (0-7)
109 if ((results & 0x80) == 0) {
110 /* I suspect "spurious" interrupts are from unmasking an IRQ.
111 * We don't know if an interrupt was/is pending and thus
112 * just call the handler for that IRQ as if it were pending.
117 /* Check to see which device is interrupting */
118 local_irq = results & 0x0f;
120 if (local_irq == 2 || local_irq > 7) {
121 printk(KERN_ERR PFX "slave interrupted!\n");
125 if (local_irq == 7) {
127 /* Could be spurious. Check in service bits */
129 outb(OCW3_ISR,IC_PIC1+0);
130 results = inb(IC_PIC1+0);
131 if ((results & 0x80) == 0) { /* if ISR7 not set: spurious */
132 printk(KERN_WARNING PFX "spurious interrupt!\n");
137 /* Call the appropriate device's interrupt */
138 generic_handle_irq(local_irq);
140 /* set EOI - forces a new interrupt if a lower priority device
141 * still needs service.
143 outb((OCW2_SEOI|local_irq),IC_PIC1 + 0);
147 /* Initialize Super I/O device */
149 superio_init(struct pci_dev *pcidev)
151 struct superio_device *sio = &sio_dev;
152 struct pci_dev *pdev = sio->lio_pdev;
156 if (sio->suckyio_irq_enabled)
160 BUG_ON(!sio->usb_pdev);
162 /* use the IRQ iosapic found for USB INT D... */
163 pdev->irq = sio->usb_pdev->irq;
165 /* ...then properly fixup the USB to point at suckyio PIC */
166 sio->usb_pdev->irq = superio_fixup_irq(sio->usb_pdev);
168 printk(KERN_INFO PFX "Found NS87560 Legacy I/O device at %s (IRQ %i)\n",
169 pci_name(pdev), pdev->irq);
171 pci_read_config_dword (pdev, SIO_SP1BAR, &sio->sp1_base);
173 printk(KERN_INFO PFX "Serial port 1 at 0x%x\n", sio->sp1_base);
175 pci_read_config_dword (pdev, SIO_SP2BAR, &sio->sp2_base);
177 printk(KERN_INFO PFX "Serial port 2 at 0x%x\n", sio->sp2_base);
179 pci_read_config_dword (pdev, SIO_PPBAR, &sio->pp_base);
181 printk(KERN_INFO PFX "Parallel port at 0x%x\n", sio->pp_base);
183 pci_read_config_dword (pdev, SIO_FDCBAR, &sio->fdc_base);
185 printk(KERN_INFO PFX "Floppy controller at 0x%x\n", sio->fdc_base);
186 pci_read_config_dword (pdev, SIO_ACPIBAR, &sio->acpi_base);
187 sio->acpi_base &= ~1;
188 printk(KERN_INFO PFX "ACPI at 0x%x\n", sio->acpi_base);
190 request_region (IC_PIC1, 0x1f, "pic1");
191 request_region (IC_PIC2, 0x1f, "pic2");
192 request_region (sio->acpi_base, 0x1f, "acpi");
194 /* Enable the legacy I/O function */
195 pci_read_config_word (pdev, PCI_COMMAND, &word);
196 word |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY | PCI_COMMAND_IO;
197 pci_write_config_word (pdev, PCI_COMMAND, word);
199 pci_set_master (pdev);
200 ret = pci_enable_device(pdev);
201 BUG_ON(ret < 0); /* not too much we can do about this... */
204 * Next project is programming the onboard interrupt controllers.
205 * PDC hasn't done this for us, since it's using polled I/O.
207 * XXX Use dword writes to avoid bugs in Elroy or Suckyio Config
208 * space access. PCI is by nature a 32-bit bus and config
209 * space can be sensitive to that.
216 TRIGGER_1 == 0x82 USB & IDE level triggered, rest to edge
218 pci_write_config_dword (pdev, 0x64, 0x82000000U);
221 TRIGGER_2 == 0x00 all edge triggered (not used)
222 CFG_IR_SER == 0x43 SerPort1 = IRQ3, SerPort2 = IRQ4
223 CFG_IR_PF == 0x65 ParPort = IRQ5, FloppyCtlr = IRQ6
224 CFG_IR_IDE == 0x07 IDE1 = IRQ7, reserved
226 pci_write_config_dword (pdev, TRIGGER_2, 0x07654300U);
230 CFG_IR_INTCD == 0x10 USB = IRQ1
234 pci_write_config_dword (pdev, CFG_IR_INTAB, 0x00001000U);
237 CFG_IR_USB == 0x00 not used. USB is connected to INTD.
238 CFG_IR_ACPI == 0x00 not used.
239 DMA Priority == 0x4c88 Power on default value. NFC.
241 pci_write_config_dword (pdev, CFG_IR_USB, 0x4c880000U);
243 /* PIC1 Initialization Command Word register programming */
244 outb (0x11,IC_PIC1+0); /* ICW1: ICW4 write req | ICW1 */
245 outb (0x00,IC_PIC1+1); /* ICW2: interrupt vector table - not used */
246 outb (0x04,IC_PIC1+1); /* ICW3: Cascade */
247 outb (0x01,IC_PIC1+1); /* ICW4: x86 mode */
249 /* PIC1 Program Operational Control Words */
250 outb (0xff,IC_PIC1+1); /* OCW1: Mask all interrupts */
251 outb (0xc2,IC_PIC1+0); /* OCW2: priority (3-7,0-2) */
253 /* PIC2 Initialization Command Word register programming */
254 outb (0x11,IC_PIC2+0); /* ICW1: ICW4 write req | ICW1 */
255 outb (0x00,IC_PIC2+1); /* ICW2: N/A */
256 outb (0x02,IC_PIC2+1); /* ICW3: Slave ID code */
257 outb (0x01,IC_PIC2+1); /* ICW4: x86 mode */
259 /* Program Operational Control Words */
260 outb (0xff,IC_PIC1+1); /* OCW1: Mask all interrupts */
261 outb (0x68,IC_PIC1+0); /* OCW3: OCW3 select | ESMM | SMM */
263 /* Write master mask reg */
264 outb (0xff,IC_PIC1+1);
266 /* Setup USB power regulation */
267 outb(1, sio->acpi_base + USB_REG_CR);
268 if (inb(sio->acpi_base + USB_REG_CR) & 1)
269 printk(KERN_INFO PFX "USB regulator enabled\n");
271 printk(KERN_ERR PFX "USB regulator not initialized!\n");
273 if (request_irq(pdev->irq, superio_interrupt, 0,
274 SUPERIO, (void *)sio)) {
276 printk(KERN_ERR PFX "could not get irq\n");
281 sio->suckyio_irq_enabled = 1;
283 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87560_LIO, superio_init);
285 static void superio_mask_irq(struct irq_data *d)
287 unsigned int irq = d->irq;
290 if ((irq < 1) || (irq == 2) || (irq > 7)) {
291 printk(KERN_ERR PFX "Illegal irq number.\n");
303 static void superio_unmask_irq(struct irq_data *d)
305 unsigned int irq = d->irq;
308 if ((irq < 1) || (irq == 2) || (irq > 7)) {
309 printk(KERN_ERR PFX "Illegal irq number (%d).\n", irq);
314 /* Unmask interrupt */
320 static struct irq_chip superio_interrupt_type = {
322 .irq_unmask = superio_unmask_irq,
323 .irq_mask = superio_mask_irq,
326 #ifdef DEBUG_SUPERIO_INIT
327 static unsigned short expected_device[3] = {
328 PCI_DEVICE_ID_NS_87415,
329 PCI_DEVICE_ID_NS_87560_LIO,
330 PCI_DEVICE_ID_NS_87560_USB
334 int superio_fixup_irq(struct pci_dev *pcidev)
338 #ifdef DEBUG_SUPERIO_INIT
340 fn = PCI_FUNC(pcidev->devfn);
342 /* Verify the function number matches the expected device id. */
343 if (expected_device[fn] != pcidev->device) {
347 printk(KERN_DEBUG "superio_fixup_irq(%s) ven 0x%x dev 0x%x from %ps\n",
349 pcidev->vendor, pcidev->device,
350 __builtin_return_address(0));
353 for (i = 0; i < 16; i++) {
354 irq_set_chip_and_handler(i, &superio_interrupt_type,
359 * We don't allocate a SuperIO irq for the legacy IO function,
360 * since it is a "bridge". Instead, we will allocate irq's for
361 * each legacy device as they are initialized.
364 switch(pcidev->device) {
365 case PCI_DEVICE_ID_NS_87415: /* Function 0 */
368 case PCI_DEVICE_ID_NS_87560_LIO: /* Function 1 */
369 sio_dev.lio_pdev = pcidev; /* save for superio_init() */
371 case PCI_DEVICE_ID_NS_87560_USB: /* Function 2 */
372 sio_dev.usb_pdev = pcidev; /* save for superio_init() */
384 static void __init superio_serial_init(void)
386 #ifdef CONFIG_SERIAL_8250
388 struct uart_port serial_port;
390 memset(&serial_port, 0, sizeof(serial_port));
391 serial_port.iotype = UPIO_PORT;
392 serial_port.type = PORT_16550A;
393 serial_port.uartclk = 115200*16;
394 serial_port.flags = UPF_FIXED_PORT | UPF_FIXED_TYPE |
398 serial_port.iobase = sio_dev.sp1_base;
399 serial_port.irq = SP1_IRQ;
400 serial_port.line = 0;
401 retval = early_serial_setup(&serial_port);
403 printk(KERN_WARNING PFX "Register Serial #0 failed.\n");
408 serial_port.iobase = sio_dev.sp2_base;
409 serial_port.irq = SP2_IRQ;
410 serial_port.line = 1;
411 retval = early_serial_setup(&serial_port);
413 printk(KERN_WARNING PFX "Register Serial #1 failed.\n");
414 #endif /* CONFIG_SERIAL_8250 */
418 static void __init superio_parport_init(void)
420 #ifdef CONFIG_PARPORT_PC
421 if (!parport_pc_probe_port(sio_dev.pp_base,
424 PARPORT_DMA_NONE /* dma */,
425 NULL /*struct pci_dev* */,
426 0 /* shared irq flags */))
428 printk(KERN_WARNING PFX "Probing parallel port failed.\n");
429 #endif /* CONFIG_PARPORT_PC */
433 static void superio_fixup_pci(struct pci_dev *pdev)
438 pci_write_config_byte(pdev, PCI_CLASS_PROG, pdev->class);
440 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
441 printk("PCI: Enabled native mode for NS87415 (pif=0x%x)\n", prog);
443 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87415, superio_fixup_pci);
447 superio_probe(struct pci_dev *dev, const struct pci_device_id *id)
449 struct superio_device *sio = &sio_dev;
452 ** superio_probe(00:0e.0) ven 0x100b dev 0x2 sv 0x0 sd 0x0 class 0x1018a
453 ** superio_probe(00:0e.1) ven 0x100b dev 0xe sv 0x0 sd 0x0 class 0x68000
454 ** superio_probe(00:0e.2) ven 0x100b dev 0x12 sv 0x0 sd 0x0 class 0xc0310
456 DBG_INIT("superio_probe(%s) ven 0x%x dev 0x%x sv 0x%x sd 0x%x class 0x%x\n",
458 dev->vendor, dev->device,
459 dev->subsystem_vendor, dev->subsystem_device,
462 BUG_ON(!sio->suckyio_irq_enabled); /* Enabled by PCI_FIXUP_FINAL */
464 if (dev->device == PCI_DEVICE_ID_NS_87560_LIO) { /* Function 1 */
465 superio_parport_init();
466 superio_serial_init();
467 /* REVISIT XXX : superio_fdc_init() ? */
469 } else if (dev->device == PCI_DEVICE_ID_NS_87415) { /* Function 0 */
470 DBG_INIT("superio_probe: ignoring IDE 87415\n");
471 } else if (dev->device == PCI_DEVICE_ID_NS_87560_USB) { /* Function 2 */
472 DBG_INIT("superio_probe: ignoring USB OHCI controller\n");
474 DBG_INIT("superio_probe: WTF? Fire Extinguisher?\n");
477 /* Let appropriate other driver claim this device. */
481 static const struct pci_device_id superio_tbl[] __initconst = {
482 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87560_LIO) },
483 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87560_USB) },
484 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87415) },
488 static struct pci_driver superio_driver __refdata = {
490 .id_table = superio_tbl,
491 .probe = superio_probe,
494 module_pci_driver(superio_driver);