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[PARISC] Always spinlock tlb flush operations to ensure preempt safety
[net-next-2.6.git] / drivers / parisc / superio.c
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1da177e4
LT		 1/* National Semiconductor NS87560UBD Super I/O controller used in
2 * HP [BCJ]x000 workstations.
3 *
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.
7 *
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>
7efe1611 14 * (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
1da177e4
LT		 15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * The initial version of this is by Martin Peterson. Alex deVries
22 * has spent a bit of time trying to coax it into working.
23 *
24 * Major changes to get basic interrupt infrastructure working to
25 * hopefully be able to support all SuperIO devices. Currently
26 * works with serial. -- John Marvin <jsm@fc.hp.com>
27 */
28
29
30/* NOTES:
31 *
32 * Function 0 is an IDE controller. It is identical to a PC87415 IDE
33 * controller (and identifies itself as such).
34 *
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:
38 *
39 * Two 16550A compatible serial controllers
40 * An IEEE 1284 compatible parallel port
41 * A floppy disk controller
42 *
43 * Function 2 is a USB controller.
44 *
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. @#$!&
49 *
50 * According to HP, devices are only enabled by firmware if they have
51 * a physical device connected.
52 *
53 * Configuration register bits:
54 * 0x5A: FDC, SP1, IDE1, SP2, IDE2, PAR, Reserved, P92
55 * 0x5B: RTC, 8259, 8254, DMA1, DMA2, KBC, P61, APM
56 *
57 */
58
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/delay.h>
73
74#include <asm/io.h>
75#include <asm/hardware.h>
76#include <asm/superio.h>
77
78static struct superio_device sio_dev;
79
80
81#undef DEBUG_SUPERIO_INIT
82
83#ifdef DEBUG_SUPERIO_INIT
84#define DBG_INIT(x...) printk(x)
85#else
86#define DBG_INIT(x...)
87#endif
88
89static irqreturn_t
90superio_interrupt(int parent_irq, void *devp, struct pt_regs *regs)
91{
92 u8 results;
93 u8 local_irq;
94
95 /* Poll the 8259 to see if there's an interrupt. */
96 outb (OCW3_POLL,IC_PIC1+0);
97
98 results = inb(IC_PIC1+0);
99
100 /*
101 * Bit 7: 1 = active Interrupt; 0 = no Interrupt pending
102 * Bits 6-3: zero
103 * Bits 2-0: highest priority, active requesting interrupt ID (0-7)
104 */
105 if ((results & 0x80) == 0) {
106 /* I suspect "spurious" interrupts are from unmasking an IRQ.
107 * We don't know if an interrupt was/is pending and thus
108 * just call the handler for that IRQ as if it were pending.
109 */
110 return IRQ_NONE;
111 }
112
113 /* Check to see which device is interrupting */
114 local_irq = results & 0x0f;
115
116 if (local_irq == 2 || local_irq > 7) {
117 printk(KERN_ERR "SuperIO: slave interrupted!\n");
118 return IRQ_HANDLED;
119 }
120
121 if (local_irq == 7) {
122
123 /* Could be spurious. Check in service bits */
124
125 outb(OCW3_ISR,IC_PIC1+0);
126 results = inb(IC_PIC1+0);
127 if ((results & 0x80) == 0) { /* if ISR7 not set: spurious */
128 printk(KERN_WARNING "SuperIO: spurious interrupt!\n");
129 return IRQ_HANDLED;
130 }
131 }
132
133 /* Call the appropriate device's interrupt */
134 __do_IRQ(local_irq, regs);
135
136 /* set EOI - forces a new interrupt if a lower priority device
137 * still needs service.
138 */
139 outb((OCW2_SEOI|local_irq),IC_PIC1 + 0);
140 return IRQ_HANDLED;
141}
142
143/* Initialize Super I/O device */
144
145static void __devinit
146superio_init(struct superio_device *sio)
147{
148 struct pci_dev *pdev = sio->lio_pdev;
149 u16 word;
150
151 if (sio->suckyio_irq_enabled)
152 return;
153
154 if (!pdev) BUG();
155 if (!sio->usb_pdev) BUG();
156
157 /* use the IRQ iosapic found for USB INT D... */
158 pdev->irq = sio->usb_pdev->irq;
159
160 /* ...then properly fixup the USB to point at suckyio PIC */
161 sio->usb_pdev->irq = superio_fixup_irq(sio->usb_pdev);
162
163 printk (KERN_INFO "SuperIO: Found NS87560 Legacy I/O device at %s (IRQ %i) \n",
164 pci_name(pdev),pdev->irq);
165
166 pci_read_config_dword (pdev, SIO_SP1BAR, &sio->sp1_base);
167 sio->sp1_base &= ~1;
168 printk (KERN_INFO "SuperIO: Serial port 1 at 0x%x\n", sio->sp1_base);
169
170 pci_read_config_dword (pdev, SIO_SP2BAR, &sio->sp2_base);
171 sio->sp2_base &= ~1;
172 printk (KERN_INFO "SuperIO: Serial port 2 at 0x%x\n", sio->sp2_base);
173
174 pci_read_config_dword (pdev, SIO_PPBAR, &sio->pp_base);
175 sio->pp_base &= ~1;
176 printk (KERN_INFO "SuperIO: Parallel port at 0x%x\n", sio->pp_base);
177
178 pci_read_config_dword (pdev, SIO_FDCBAR, &sio->fdc_base);
179 sio->fdc_base &= ~1;
180 printk (KERN_INFO "SuperIO: Floppy controller at 0x%x\n", sio->fdc_base);
181 pci_read_config_dword (pdev, SIO_ACPIBAR, &sio->acpi_base);
182 sio->acpi_base &= ~1;
183 printk (KERN_INFO "SuperIO: ACPI at 0x%x\n", sio->acpi_base);
184
185 request_region (IC_PIC1, 0x1f, "pic1");
186 request_region (IC_PIC2, 0x1f, "pic2");
187 request_region (sio->acpi_base, 0x1f, "acpi");
188
189 /* Enable the legacy I/O function */
190 pci_read_config_word (pdev, PCI_COMMAND, &word);
191 word |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY | PCI_COMMAND_IO;
192 pci_write_config_word (pdev, PCI_COMMAND, word);
193
194 pci_set_master (pdev);
195 pci_enable_device(pdev);
196
197 /*
198 * Next project is programming the onboard interrupt controllers.
199 * PDC hasn't done this for us, since it's using polled I/O.
200 *
201 * XXX Use dword writes to avoid bugs in Elroy or Suckyio Config
202 * space access. PCI is by nature a 32-bit bus and config
203 * space can be sensitive to that.
204 */
205
206 /* 0x64 - 0x67 :
207 DMA Rtg 2
208 DMA Rtg 3
209 DMA Chan Ctl
210 TRIGGER_1 == 0x82 USB & IDE level triggered, rest to edge
211 */
212 pci_write_config_dword (pdev, 0x64, 0x82000000U);
213
214 /* 0x68 - 0x6b :
215 TRIGGER_2 == 0x00 all edge triggered (not used)
216 CFG_IR_SER == 0x43 SerPort1 = IRQ3, SerPort2 = IRQ4
217 CFG_IR_PF == 0x65 ParPort = IRQ5, FloppyCtlr = IRQ6
218 CFG_IR_IDE == 0x07 IDE1 = IRQ7, reserved
219 */
220 pci_write_config_dword (pdev, TRIGGER_2, 0x07654300U);
221
222 /* 0x6c - 0x6f :
223 CFG_IR_INTAB == 0x00
224 CFG_IR_INTCD == 0x10 USB = IRQ1
225 CFG_IR_PS2 == 0x00
226 CFG_IR_FXBUS == 0x00
227 */
228 pci_write_config_dword (pdev, CFG_IR_INTAB, 0x00001000U);
229
230 /* 0x70 - 0x73 :
231 CFG_IR_USB == 0x00 not used. USB is connected to INTD.
232 CFG_IR_ACPI == 0x00 not used.
233 DMA Priority == 0x4c88 Power on default value. NFC.
234 */
235 pci_write_config_dword (pdev, CFG_IR_USB, 0x4c880000U);
236
237 /* PIC1 Initialization Command Word register programming */
238 outb (0x11,IC_PIC1+0); /* ICW1: ICW4 write req | ICW1 */
239 outb (0x00,IC_PIC1+1); /* ICW2: interrupt vector table - not used */
240 outb (0x04,IC_PIC1+1); /* ICW3: Cascade */
241 outb (0x01,IC_PIC1+1); /* ICW4: x86 mode */
242
243 /* PIC1 Program Operational Control Words */
244 outb (0xff,IC_PIC1+1); /* OCW1: Mask all interrupts */
245 outb (0xc2,IC_PIC1+0); /* OCW2: priority (3-7,0-2) */
246
247 /* PIC2 Initialization Command Word register programming */
248 outb (0x11,IC_PIC2+0); /* ICW1: ICW4 write req | ICW1 */
249 outb (0x00,IC_PIC2+1); /* ICW2: N/A */
250 outb (0x02,IC_PIC2+1); /* ICW3: Slave ID code */
251 outb (0x01,IC_PIC2+1); /* ICW4: x86 mode */
252
253 /* Program Operational Control Words */
254 outb (0xff,IC_PIC1+1); /* OCW1: Mask all interrupts */
255 outb (0x68,IC_PIC1+0); /* OCW3: OCW3 select | ESMM | SMM */
256
257 /* Write master mask reg */
258 outb (0xff,IC_PIC1+1);
259
260 /* Setup USB power regulation */
261 outb(1, sio->acpi_base + USB_REG_CR);
262 if (inb(sio->acpi_base + USB_REG_CR) & 1)
263 printk(KERN_INFO "SuperIO: USB regulator enabled\n");
264 else
265 printk(KERN_ERR "USB regulator not initialized!\n");
266
267 if (request_irq(pdev->irq, superio_interrupt, SA_INTERRUPT,
268 "SuperIO", (void *)sio)) {
269
270 printk(KERN_ERR "SuperIO: could not get irq\n");
271 BUG();
272 return;
273 }
274
275 sio->suckyio_irq_enabled = 1;
276}
277
278
279static void superio_disable_irq(unsigned int irq)
280{
281 u8 r8;
282
283 if ((irq < 1) || (irq == 2) || (irq > 7)) {
284 printk(KERN_ERR "SuperIO: Illegal irq number.\n");
285 BUG();
286 return;
287 }
288
289 /* Mask interrupt */
290
291 r8 = inb(IC_PIC1+1);
292 r8 |= (1 << irq);
293 outb (r8,IC_PIC1+1);
294}
295
296static void superio_enable_irq(unsigned int irq)
297{
298 u8 r8;
299
300 if ((irq < 1) || (irq == 2) || (irq > 7)) {
301 printk(KERN_ERR "SuperIO: Illegal irq number (%d).\n", irq);
302 BUG();
303 return;
304 }
305
306 /* Unmask interrupt */
307 r8 = inb(IC_PIC1+1);
308 r8 &= ~(1 << irq);
309 outb (r8,IC_PIC1+1);
310}
311
312static unsigned int superio_startup_irq(unsigned int irq)
313{
314 superio_enable_irq(irq);
315 return 0;
316}
317
318static struct hw_interrupt_type superio_interrupt_type = {
319 .typename = "SuperIO",
320 .startup = superio_startup_irq,
321 .shutdown = superio_disable_irq,
322 .enable = superio_enable_irq,
323 .disable = superio_disable_irq,
324 .ack = no_ack_irq,
325 .end = no_end_irq,
326};
327
328#ifdef DEBUG_SUPERIO_INIT
329static unsigned short expected_device[3] = {
330 PCI_DEVICE_ID_NS_87415,
331 PCI_DEVICE_ID_NS_87560_LIO,
332 PCI_DEVICE_ID_NS_87560_USB
333};
334#endif
335
336int superio_fixup_irq(struct pci_dev *pcidev)
337{
338 int local_irq, i;
339
340#ifdef DEBUG_SUPERIO_INIT
341 int fn;
342 fn = PCI_FUNC(pcidev->devfn);
343
344 /* Verify the function number matches the expected device id. */
345 if (expected_device[fn] != pcidev->device) {
346 BUG();
347 return -1;
348 }
349 printk("superio_fixup_irq(%s) ven 0x%x dev 0x%x from %p\n",
350 pci_name(pcidev),
351 pcidev->vendor, pcidev->device,
352 __builtin_return_address(0));
353#endif
354
355 for (i = 0; i < 16; i++) {
356 irq_desc[i].handler = &superio_interrupt_type;
357 }
358
359 /*
360 * We don't allocate a SuperIO irq for the legacy IO function,
361 * since it is a "bridge". Instead, we will allocate irq's for
362 * each legacy device as they are initialized.
363 */
364
365 switch(pcidev->device) {
366 case PCI_DEVICE_ID_NS_87415: /* Function 0 */
367 local_irq = IDE_IRQ;
368 break;
369 case PCI_DEVICE_ID_NS_87560_LIO: /* Function 1 */
370 sio_dev.lio_pdev = pcidev; /* save for superio_init() */
371 return -1;
372 case PCI_DEVICE_ID_NS_87560_USB: /* Function 2 */
373 sio_dev.usb_pdev = pcidev; /* save for superio_init() */
374 local_irq = USB_IRQ;
375 break;
376 default:
377 local_irq = -1;
378 BUG();
379 break;
380 }
381
382 return local_irq;
383}
384
385static struct uart_port serial[] = {
386 {
387 .iotype = UPIO_PORT,
388 .line = 0,
389 .type = PORT_16550A,
390 .uartclk = 115200*16,
391 .fifosize = 16,
392 },
393 {
394 .iotype = UPIO_PORT,
395 .line = 1,
396 .type = PORT_16550A,
397 .uartclk = 115200*16,
398 .fifosize = 16,
399 }
400};
401
402static void __devinit superio_serial_init(void)
403{
404#ifdef CONFIG_SERIAL_8250
405 int retval;
406
407 serial[0].iobase = sio_dev.sp1_base;
408 serial[0].irq = SP1_IRQ;
7efe1611 409 spin_lock_init(&serial[0].lock);
1da177e4
LT		 410
411 retval = early_serial_setup(&serial[0]);
412 if (retval < 0) {
413 printk(KERN_WARNING "SuperIO: Register Serial #0 failed.\n");
414 return;
415 }
416
417 serial[1].iobase = sio_dev.sp2_base;
418 serial[1].irq = SP2_IRQ;
7efe1611 419 spin_lock_init(&serial[1].lock);
1da177e4
LT		 420 retval = early_serial_setup(&serial[1]);
421
422 if (retval < 0)
423 printk(KERN_WARNING "SuperIO: Register Serial #1 failed.\n");
424#endif /* CONFIG_SERIAL_8250 */
425}
426
427
428static void __devinit superio_parport_init(void)
429{
430#ifdef CONFIG_PARPORT_PC
431 if (!parport_pc_probe_port(sio_dev.pp_base,
432 0 /*base_hi*/,
433 PAR_IRQ,
434 PARPORT_DMA_NONE /* dma */,
435 NULL /*struct pci_dev* */) )
436
437 printk(KERN_WARNING "SuperIO: Probing parallel port failed.\n");
438#endif /* CONFIG_PARPORT_PC */
439}
440
441
442static void superio_fixup_pci(struct pci_dev *pdev)
443{
444 u8 prog;
445
446 pdev->class |= 0x5;
447 pci_write_config_byte(pdev, PCI_CLASS_PROG, pdev->class);
448
449 pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
450 printk("PCI: Enabled native mode for NS87415 (pif=0x%x)\n", prog);
451}
452DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87415, superio_fixup_pci);
453
454
455static int __devinit superio_probe(struct pci_dev *dev, const struct pci_device_id *id)
456{
457
458 /*
459 ** superio_probe(00:0e.0) ven 0x100b dev 0x2 sv 0x0 sd 0x0 class 0x1018a
460 ** superio_probe(00:0e.1) ven 0x100b dev 0xe sv 0x0 sd 0x0 class 0x68000
461 ** superio_probe(00:0e.2) ven 0x100b dev 0x12 sv 0x0 sd 0x0 class 0xc0310
462 */
463 DBG_INIT("superio_probe(%s) ven 0x%x dev 0x%x sv 0x%x sd 0x%x class 0x%x\n",
464 pci_name(dev),
465 dev->vendor, dev->device,
466 dev->subsystem_vendor, dev->subsystem_device,
467 dev->class);
468
469 superio_init(&sio_dev);
470
471 if (dev->device == PCI_DEVICE_ID_NS_87560_LIO) { /* Function 1 */
472 superio_parport_init();
473 superio_serial_init();
474 /* REVISIT XXX : superio_fdc_init() ? */
475 return 0;
476 } else if (dev->device == PCI_DEVICE_ID_NS_87415) { /* Function 0 */
477 DBG_INIT("superio_probe: ignoring IDE 87415\n");
478 } else if (dev->device == PCI_DEVICE_ID_NS_87560_USB) { /* Function 2 */
479 DBG_INIT("superio_probe: ignoring USB OHCI controller\n");
480 } else {
481 DBG_INIT("superio_probe: WTF? Fire Extinguisher?\n");
482 }
483
484 /* Let appropriate other driver claim this device. */
485 return -ENODEV;
486}
487
488static struct pci_device_id superio_tbl[] = {
489 { PCI_VENDOR_ID_NS, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
490 { 0, }
491};
492
493static struct pci_driver superio_driver = {
494 .name = "SuperIO",
495 .id_table = superio_tbl,
496 .probe = superio_probe,
497};
498
499static int __init superio_modinit(void)
500{
501 return pci_register_driver(&superio_driver);
502}
503
504static void __exit superio_exit(void)
505{
506 pci_unregister_driver(&superio_driver);
507}
508
509
510module_init(superio_modinit);
511module_exit(superio_exit);
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