1 /* National Semiconductor NS87560UBD Super I/O controller used in
2 * HP [BCJ]x000 workstations.
4 * This chip is a horrid piece of engineering, and National
5 * denies any knowledge of its existence. Thus no datasheet is
6 * available off www.national.com.
8 * (C) Copyright 2000 Linuxcare, Inc.
9 * (C) Copyright 2000 Linuxcare Canada, Inc.
10 * (C) Copyright 2000 Martin K. Petersen <mkp@linuxcare.com>
11 * (C) Copyright 2000 Alex deVries <alex@onefishtwo.ca>
12 * (C) Copyright 2001 John Marvin <jsm fc hp com>
13 * (C) Copyright 2003 Grant Grundler <grundler parisc-linux org>
14 * (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
15 * (C) Copyright 2006 Helge Deller <deller@gmx.de>
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
22 * The initial version of this is by Martin Peterson. Alex deVries
23 * has spent a bit of time trying to coax it into working.
25 * Major changes to get basic interrupt infrastructure working to
26 * hopefully be able to support all SuperIO devices. Currently
27 * works with serial. -- John Marvin <jsm@fc.hp.com>
29 * Converted superio_init() to be a PCI_FIXUP_FINAL callee.
30 * -- Kyle McMartin <kyle@parisc-linux.org>
36 * Function 0 is an IDE controller. It is identical to a PC87415 IDE
37 * controller (and identifies itself as such).
39 * Function 1 is a "Legacy I/O" controller. Under this function is a
40 * whole mess of legacy I/O peripherals. Of course, HP hasn't enabled
41 * all the functionality in hardware, but the following is available:
43 * Two 16550A compatible serial controllers
44 * An IEEE 1284 compatible parallel port
45 * A floppy disk controller
47 * Function 2 is a USB controller.
49 * We must be incredibly careful during initialization. Since all
50 * interrupts are routed through function 1 (which is not allowed by
51 * the PCI spec), we need to program the PICs on the legacy I/O port
52 * *before* we attempt to set up IDE and USB. @#$!&
54 * According to HP, devices are only enabled by firmware if they have
55 * a physical device connected.
57 * Configuration register bits:
58 * 0x5A: FDC, SP1, IDE1, SP2, IDE2, PAR, Reserved, P92
59 * 0x5B: RTC, 8259, 8254, DMA1, DMA2, KBC, P61, APM
63 #include <linux/errno.h>
64 #include <linux/init.h>
65 #include <linux/module.h>
66 #include <linux/types.h>
67 #include <linux/interrupt.h>
68 #include <linux/ioport.h>
69 #include <linux/serial.h>
70 #include <linux/pci.h>
71 #include <linux/parport.h>
72 #include <linux/parport_pc.h>
73 #include <linux/termios.h>
74 #include <linux/tty.h>
75 #include <linux/serial_core.h>
76 #include <linux/serial_8250.h>
77 #include <linux/delay.h>
80 #include <asm/hardware.h>
81 #include <asm/superio.h>
83 static struct superio_device sio_dev
;
86 #undef DEBUG_SUPERIO_INIT
88 #ifdef DEBUG_SUPERIO_INIT
89 #define DBG_INIT(x...) printk(x)
91 #define DBG_INIT(x...)
94 #define SUPERIO "SuperIO"
95 #define PFX SUPERIO ": "
98 superio_interrupt(int parent_irq
, void *devp
)
103 /* Poll the 8259 to see if there's an interrupt. */
104 outb (OCW3_POLL
,IC_PIC1
+0);
106 results
= inb(IC_PIC1
+0);
109 * Bit 7: 1 = active Interrupt; 0 = no Interrupt pending
111 * Bits 2-0: highest priority, active requesting interrupt ID (0-7)
113 if ((results
& 0x80) == 0) {
114 /* I suspect "spurious" interrupts are from unmasking an IRQ.
115 * We don't know if an interrupt was/is pending and thus
116 * just call the handler for that IRQ as if it were pending.
121 /* Check to see which device is interrupting */
122 local_irq
= results
& 0x0f;
124 if (local_irq
== 2 || local_irq
> 7) {
125 printk(KERN_ERR PFX
"slave interrupted!\n");
129 if (local_irq
== 7) {
131 /* Could be spurious. Check in service bits */
133 outb(OCW3_ISR
,IC_PIC1
+0);
134 results
= inb(IC_PIC1
+0);
135 if ((results
& 0x80) == 0) { /* if ISR7 not set: spurious */
136 printk(KERN_WARNING PFX
"spurious interrupt!\n");
141 /* Call the appropriate device's interrupt */
142 generic_handle_irq(local_irq
);
144 /* set EOI - forces a new interrupt if a lower priority device
145 * still needs service.
147 outb((OCW2_SEOI
|local_irq
),IC_PIC1
+ 0);
151 /* Initialize Super I/O device */
153 superio_init(struct pci_dev
*pcidev
)
155 struct superio_device
*sio
= &sio_dev
;
156 struct pci_dev
*pdev
= sio
->lio_pdev
;
160 if (sio
->suckyio_irq_enabled
)
164 BUG_ON(!sio
->usb_pdev
);
166 /* use the IRQ iosapic found for USB INT D... */
167 pdev
->irq
= sio
->usb_pdev
->irq
;
169 /* ...then properly fixup the USB to point at suckyio PIC */
170 sio
->usb_pdev
->irq
= superio_fixup_irq(sio
->usb_pdev
);
172 printk(KERN_INFO PFX
"Found NS87560 Legacy I/O device at %s (IRQ %i)\n",
173 pci_name(pdev
), pdev
->irq
);
175 pci_read_config_dword (pdev
, SIO_SP1BAR
, &sio
->sp1_base
);
177 printk(KERN_INFO PFX
"Serial port 1 at 0x%x\n", sio
->sp1_base
);
179 pci_read_config_dword (pdev
, SIO_SP2BAR
, &sio
->sp2_base
);
181 printk(KERN_INFO PFX
"Serial port 2 at 0x%x\n", sio
->sp2_base
);
183 pci_read_config_dword (pdev
, SIO_PPBAR
, &sio
->pp_base
);
185 printk(KERN_INFO PFX
"Parallel port at 0x%x\n", sio
->pp_base
);
187 pci_read_config_dword (pdev
, SIO_FDCBAR
, &sio
->fdc_base
);
189 printk(KERN_INFO PFX
"Floppy controller at 0x%x\n", sio
->fdc_base
);
190 pci_read_config_dword (pdev
, SIO_ACPIBAR
, &sio
->acpi_base
);
191 sio
->acpi_base
&= ~1;
192 printk(KERN_INFO PFX
"ACPI at 0x%x\n", sio
->acpi_base
);
194 request_region (IC_PIC1
, 0x1f, "pic1");
195 request_region (IC_PIC2
, 0x1f, "pic2");
196 request_region (sio
->acpi_base
, 0x1f, "acpi");
198 /* Enable the legacy I/O function */
199 pci_read_config_word (pdev
, PCI_COMMAND
, &word
);
200 word
|= PCI_COMMAND_SERR
| PCI_COMMAND_PARITY
| PCI_COMMAND_IO
;
201 pci_write_config_word (pdev
, PCI_COMMAND
, word
);
203 pci_set_master (pdev
);
204 ret
= pci_enable_device(pdev
);
205 BUG_ON(ret
< 0); /* not too much we can do about this... */
208 * Next project is programming the onboard interrupt controllers.
209 * PDC hasn't done this for us, since it's using polled I/O.
211 * XXX Use dword writes to avoid bugs in Elroy or Suckyio Config
212 * space access. PCI is by nature a 32-bit bus and config
213 * space can be sensitive to that.
220 TRIGGER_1 == 0x82 USB & IDE level triggered, rest to edge
222 pci_write_config_dword (pdev
, 0x64, 0x82000000U
);
225 TRIGGER_2 == 0x00 all edge triggered (not used)
226 CFG_IR_SER == 0x43 SerPort1 = IRQ3, SerPort2 = IRQ4
227 CFG_IR_PF == 0x65 ParPort = IRQ5, FloppyCtlr = IRQ6
228 CFG_IR_IDE == 0x07 IDE1 = IRQ7, reserved
230 pci_write_config_dword (pdev
, TRIGGER_2
, 0x07654300U
);
234 CFG_IR_INTCD == 0x10 USB = IRQ1
238 pci_write_config_dword (pdev
, CFG_IR_INTAB
, 0x00001000U
);
241 CFG_IR_USB == 0x00 not used. USB is connected to INTD.
242 CFG_IR_ACPI == 0x00 not used.
243 DMA Priority == 0x4c88 Power on default value. NFC.
245 pci_write_config_dword (pdev
, CFG_IR_USB
, 0x4c880000U
);
247 /* PIC1 Initialization Command Word register programming */
248 outb (0x11,IC_PIC1
+0); /* ICW1: ICW4 write req | ICW1 */
249 outb (0x00,IC_PIC1
+1); /* ICW2: interrupt vector table - not used */
250 outb (0x04,IC_PIC1
+1); /* ICW3: Cascade */
251 outb (0x01,IC_PIC1
+1); /* ICW4: x86 mode */
253 /* PIC1 Program Operational Control Words */
254 outb (0xff,IC_PIC1
+1); /* OCW1: Mask all interrupts */
255 outb (0xc2,IC_PIC1
+0); /* OCW2: priority (3-7,0-2) */
257 /* PIC2 Initialization Command Word register programming */
258 outb (0x11,IC_PIC2
+0); /* ICW1: ICW4 write req | ICW1 */
259 outb (0x00,IC_PIC2
+1); /* ICW2: N/A */
260 outb (0x02,IC_PIC2
+1); /* ICW3: Slave ID code */
261 outb (0x01,IC_PIC2
+1); /* ICW4: x86 mode */
263 /* Program Operational Control Words */
264 outb (0xff,IC_PIC1
+1); /* OCW1: Mask all interrupts */
265 outb (0x68,IC_PIC1
+0); /* OCW3: OCW3 select | ESMM | SMM */
267 /* Write master mask reg */
268 outb (0xff,IC_PIC1
+1);
270 /* Setup USB power regulation */
271 outb(1, sio
->acpi_base
+ USB_REG_CR
);
272 if (inb(sio
->acpi_base
+ USB_REG_CR
) & 1)
273 printk(KERN_INFO PFX
"USB regulator enabled\n");
275 printk(KERN_ERR PFX
"USB regulator not initialized!\n");
277 if (request_irq(pdev
->irq
, superio_interrupt
, 0,
278 SUPERIO
, (void *)sio
)) {
280 printk(KERN_ERR PFX
"could not get irq\n");
285 sio
->suckyio_irq_enabled
= 1;
287 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NS
, PCI_DEVICE_ID_NS_87560_LIO
, superio_init
);
289 static void superio_mask_irq(struct irq_data
*d
)
291 unsigned int irq
= d
->irq
;
294 if ((irq
< 1) || (irq
== 2) || (irq
> 7)) {
295 printk(KERN_ERR PFX
"Illegal irq number.\n");
307 static void superio_unmask_irq(struct irq_data
*d
)
309 unsigned int irq
= d
->irq
;
312 if ((irq
< 1) || (irq
== 2) || (irq
> 7)) {
313 printk(KERN_ERR PFX
"Illegal irq number (%d).\n", irq
);
318 /* Unmask interrupt */
324 static struct irq_chip superio_interrupt_type
= {
326 .irq_unmask
= superio_unmask_irq
,
327 .irq_mask
= superio_mask_irq
,
330 #ifdef DEBUG_SUPERIO_INIT
331 static unsigned short expected_device
[3] = {
332 PCI_DEVICE_ID_NS_87415
,
333 PCI_DEVICE_ID_NS_87560_LIO
,
334 PCI_DEVICE_ID_NS_87560_USB
338 int superio_fixup_irq(struct pci_dev
*pcidev
)
342 #ifdef DEBUG_SUPERIO_INIT
344 fn
= PCI_FUNC(pcidev
->devfn
);
346 /* Verify the function number matches the expected device id. */
347 if (expected_device
[fn
] != pcidev
->device
) {
351 printk(KERN_DEBUG
"superio_fixup_irq(%s) ven 0x%x dev 0x%x from %ps\n",
353 pcidev
->vendor
, pcidev
->device
,
354 __builtin_return_address(0));
357 for (i
= 0; i
< 16; i
++) {
358 irq_set_chip_and_handler(i
, &superio_interrupt_type
,
363 * We don't allocate a SuperIO irq for the legacy IO function,
364 * since it is a "bridge". Instead, we will allocate irq's for
365 * each legacy device as they are initialized.
368 switch(pcidev
->device
) {
369 case PCI_DEVICE_ID_NS_87415
: /* Function 0 */
372 case PCI_DEVICE_ID_NS_87560_LIO
: /* Function 1 */
373 sio_dev
.lio_pdev
= pcidev
; /* save for superio_init() */
375 case PCI_DEVICE_ID_NS_87560_USB
: /* Function 2 */
376 sio_dev
.usb_pdev
= pcidev
; /* save for superio_init() */
388 static void __init
superio_serial_init(void)
390 #ifdef CONFIG_SERIAL_8250
392 struct uart_port serial_port
;
394 memset(&serial_port
, 0, sizeof(serial_port
));
395 serial_port
.iotype
= UPIO_PORT
;
396 serial_port
.type
= PORT_16550A
;
397 serial_port
.uartclk
= 115200*16;
398 serial_port
.flags
= UPF_FIXED_PORT
| UPF_FIXED_TYPE
|
402 serial_port
.iobase
= sio_dev
.sp1_base
;
403 serial_port
.irq
= SP1_IRQ
;
404 serial_port
.line
= 0;
405 retval
= early_serial_setup(&serial_port
);
407 printk(KERN_WARNING PFX
"Register Serial #0 failed.\n");
412 serial_port
.iobase
= sio_dev
.sp2_base
;
413 serial_port
.irq
= SP2_IRQ
;
414 serial_port
.line
= 1;
415 retval
= early_serial_setup(&serial_port
);
417 printk(KERN_WARNING PFX
"Register Serial #1 failed.\n");
418 #endif /* CONFIG_SERIAL_8250 */
422 static void __init
superio_parport_init(void)
424 #ifdef CONFIG_PARPORT_PC
425 if (!parport_pc_probe_port(sio_dev
.pp_base
,
428 PARPORT_DMA_NONE
/* dma */,
429 NULL
/*struct pci_dev* */,
430 0 /* shared irq flags */))
432 printk(KERN_WARNING PFX
"Probing parallel port failed.\n");
433 #endif /* CONFIG_PARPORT_PC */
437 static void superio_fixup_pci(struct pci_dev
*pdev
)
442 pci_write_config_byte(pdev
, PCI_CLASS_PROG
, pdev
->class);
444 pci_read_config_byte(pdev
, PCI_CLASS_PROG
, &prog
);
445 printk("PCI: Enabled native mode for NS87415 (pif=0x%x)\n", prog
);
447 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NS
, PCI_DEVICE_ID_NS_87415
, superio_fixup_pci
);
451 superio_probe(struct pci_dev
*dev
, const struct pci_device_id
*id
)
453 struct superio_device
*sio
= &sio_dev
;
456 ** superio_probe(00:0e.0) ven 0x100b dev 0x2 sv 0x0 sd 0x0 class 0x1018a
457 ** superio_probe(00:0e.1) ven 0x100b dev 0xe sv 0x0 sd 0x0 class 0x68000
458 ** superio_probe(00:0e.2) ven 0x100b dev 0x12 sv 0x0 sd 0x0 class 0xc0310
460 DBG_INIT("superio_probe(%s) ven 0x%x dev 0x%x sv 0x%x sd 0x%x class 0x%x\n",
462 dev
->vendor
, dev
->device
,
463 dev
->subsystem_vendor
, dev
->subsystem_device
,
466 BUG_ON(!sio
->suckyio_irq_enabled
); /* Enabled by PCI_FIXUP_FINAL */
468 if (dev
->device
== PCI_DEVICE_ID_NS_87560_LIO
) { /* Function 1 */
469 superio_parport_init();
470 superio_serial_init();
471 /* REVISIT XXX : superio_fdc_init() ? */
473 } else if (dev
->device
== PCI_DEVICE_ID_NS_87415
) { /* Function 0 */
474 DBG_INIT("superio_probe: ignoring IDE 87415\n");
475 } else if (dev
->device
== PCI_DEVICE_ID_NS_87560_USB
) { /* Function 2 */
476 DBG_INIT("superio_probe: ignoring USB OHCI controller\n");
478 DBG_INIT("superio_probe: WTF? Fire Extinguisher?\n");
481 /* Let appropriate other driver claim this device. */
485 static const struct pci_device_id superio_tbl
[] = {
486 { PCI_DEVICE(PCI_VENDOR_ID_NS
, PCI_DEVICE_ID_NS_87560_LIO
) },
487 { PCI_DEVICE(PCI_VENDOR_ID_NS
, PCI_DEVICE_ID_NS_87560_USB
) },
488 { PCI_DEVICE(PCI_VENDOR_ID_NS
, PCI_DEVICE_ID_NS_87415
) },
492 static struct pci_driver superio_driver
= {
494 .id_table
= superio_tbl
,
495 .probe
= superio_probe
,
498 module_pci_driver(superio_driver
);