2 * linux/arch/alpha/kernel/sys_sio.c
4 * Copyright (C) 1995 David A Rusling
5 * Copyright (C) 1996 Jay A Estabrook
6 * Copyright (C) 1998, 1999 Richard Henderson
8 * Code for all boards that route the PCI interrupts through the SIO
9 * PCI/ISA bridge. This includes Noname (AXPpci33), Multia (UDB),
10 * Kenetics's Platform 2000, Avanti (AlphaStation), XL, and AlphaBook1.
13 #include <linux/kernel.h>
14 #include <linux/types.h>
16 #include <linux/sched.h>
17 #include <linux/pci.h>
18 #include <linux/init.h>
19 #include <linux/screen_info.h>
21 #include <asm/compiler.h>
22 #include <asm/ptrace.h>
23 #include <asm/system.h>
26 #include <asm/mmu_context.h>
28 #include <asm/pgtable.h>
29 #include <asm/core_apecs.h>
30 #include <asm/core_lca.h>
31 #include <asm/tlbflush.h>
36 #include "machvec_impl.h"
39 #if defined(ALPHA_RESTORE_SRM_SETUP)
40 /* Save LCA configuration data as the console had it set up. */
43 unsigned int orig_route_tab; /* for SAVE/RESTORE */
44 } saved_config __attribute((common));
52 alpha_mv.device_interrupt = srm_device_interrupt;
55 common_init_isa_dma();
58 static inline void __init
59 alphabook1_init_arch(void)
61 /* The AlphaBook1 has LCD video fixed at 800x600,
62 37 rows and 100 cols. */
63 screen_info.orig_y = 37;
64 screen_info.orig_video_cols = 100;
65 screen_info.orig_video_lines = 37;
72 * sio_route_tab selects irq routing in PCI/ISA bridge so that:
78 * This probably ought to be configurable via MILO. For
79 * example, sound boards seem to like using IRQ 9.
81 * This is NOT how we should do it. PIRQ0-X should have
82 * their own IRQs, the way intel uses the IO-APIC IRQs.
88 unsigned int orig_route_tab;
90 /* First, ALWAYS read and print the original setting. */
91 pci_bus_read_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
93 printk("%s: PIRQ original 0x%x new 0x%x\n", __func__,
94 orig_route_tab, alpha_mv.sys.sio.route_tab);
96 #if defined(ALPHA_RESTORE_SRM_SETUP)
97 saved_config.orig_route_tab = orig_route_tab;
100 /* Now override with desired setting. */
101 pci_bus_write_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
102 alpha_mv.sys.sio.route_tab);
105 static unsigned int __init
106 sio_collect_irq_levels(void)
108 unsigned int level_bits = 0;
109 struct pci_dev *dev = NULL;
111 /* Iterate through the devices, collecting IRQ levels. */
112 for_each_pci_dev(dev) {
113 if ((dev->class >> 16 == PCI_BASE_CLASS_BRIDGE) &&
114 (dev->class >> 8 != PCI_CLASS_BRIDGE_PCMCIA))
118 level_bits |= (1 << dev->irq);
124 sio_fixup_irq_levels(unsigned int level_bits)
126 unsigned int old_level_bits;
129 * Now, make all PCI interrupts level sensitive. Notice:
130 * these registers must be accessed byte-wise. inw()/outw()
133 * Make sure to turn off any level bits set for IRQs 9,10,11,15,
134 * so that the only bits getting set are for devices actually found.
135 * Note that we do preserve the remainder of the bits, which we hope
136 * will be set correctly by ARC/SRM.
138 * Note: we at least preserve any level-set bits on AlphaBook1
140 old_level_bits = inb(0x4d0) | (inb(0x4d1) << 8);
142 level_bits |= (old_level_bits & 0x71ff);
144 outb((level_bits >> 0) & 0xff, 0x4d0);
145 outb((level_bits >> 8) & 0xff, 0x4d1);
148 static inline int __init
149 noname_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
152 * The Noname board has 5 PCI slots with each of the 4
153 * interrupt pins routed to different pins on the PCI/ISA
154 * bridge (PIRQ0-PIRQ3). The table below is based on
155 * information available at:
157 * http://ftp.digital.com/pub/DEC/axppci/ref_interrupts.txt
159 * I have no information on the Avanti interrupt routing, but
160 * the routing seems to be identical to the Noname except
161 * that the Avanti has an additional slot whose routing I'm
164 * pirq_tab[0] is a fake entry to deal with old PCI boards
165 * that have the interrupt pin number hardwired to 0 (meaning
166 * that they use the default INTA line, if they are interrupt
169 static char irq_tab[][5] __initdata = {
171 { 3, 3, 3, 3, 3}, /* idsel 6 (53c810) */
172 {-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */
173 { 2, 2, -1, -1, -1}, /* idsel 8 (Hack: slot closest ISA) */
174 {-1, -1, -1, -1, -1}, /* idsel 9 (unused) */
175 {-1, -1, -1, -1, -1}, /* idsel 10 (unused) */
176 { 0, 0, 2, 1, 0}, /* idsel 11 KN25_PCI_SLOT0 */
177 { 1, 1, 0, 2, 1}, /* idsel 12 KN25_PCI_SLOT1 */
178 { 2, 2, 1, 0, 2}, /* idsel 13 KN25_PCI_SLOT2 */
179 { 0, 0, 0, 0, 0}, /* idsel 14 AS255 TULIP */
181 const long min_idsel = 6, max_idsel = 14, irqs_per_slot = 5;
182 int irq = COMMON_TABLE_LOOKUP, tmp;
183 tmp = __kernel_extbl(alpha_mv.sys.sio.route_tab, irq);
184 return irq >= 0 ? tmp : -1;
187 static inline int __init
188 p2k_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
190 static char irq_tab[][5] __initdata = {
192 { 0, 0, -1, -1, -1}, /* idsel 6 (53c810) */
193 {-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */
194 { 1, 1, 2, 3, 0}, /* idsel 8 (slot A) */
195 { 2, 2, 3, 0, 1}, /* idsel 9 (slot B) */
196 {-1, -1, -1, -1, -1}, /* idsel 10 (unused) */
197 {-1, -1, -1, -1, -1}, /* idsel 11 (unused) */
198 { 3, 3, -1, -1, -1}, /* idsel 12 (CMD0646) */
200 const long min_idsel = 6, max_idsel = 12, irqs_per_slot = 5;
201 int irq = COMMON_TABLE_LOOKUP, tmp;
202 tmp = __kernel_extbl(alpha_mv.sys.sio.route_tab, irq);
203 return irq >= 0 ? tmp : -1;
206 static inline void __init
207 noname_init_pci(void)
211 sio_fixup_irq_levels(sio_collect_irq_levels());
213 if (pc873xx_probe() == -1) {
214 printk(KERN_ERR "Probing for PC873xx Super IO chip failed.\n");
216 printk(KERN_INFO "Found %s Super IO chip at 0x%x\n",
217 pc873xx_get_model(), pc873xx_get_base());
219 /* Enabling things in the Super IO chip doesn't actually
220 * configure and enable things, the legacy drivers still
221 * need to do the actual configuration and enabling.
222 * This only unblocks them.
225 #if !defined(CONFIG_ALPHA_AVANTI)
226 /* Don't bother on the Avanti family.
227 * None of them had on-board IDE.
229 pc873xx_enable_ide();
231 pc873xx_enable_epp19();
235 static inline void __init
236 alphabook1_init_pci(void)
239 unsigned char orig, config;
245 * On the AlphaBook1, the PCMCIA chip (Cirrus 6729)
246 * is sensitive to PCI bus bursts, so we must DISABLE
247 * burst mode for the NCR 8xx SCSI... :-(
249 * Note that the NCR810 SCSI driver must preserve the
250 * setting of the bit in order for this to work. At the
251 * moment (2.0.29), ncr53c8xx.c does NOT do this, but
256 while ((dev = pci_get_device(PCI_VENDOR_ID_NCR, PCI_ANY_ID, dev))) {
257 if (dev->device == PCI_DEVICE_ID_NCR_53C810
258 || dev->device == PCI_DEVICE_ID_NCR_53C815
259 || dev->device == PCI_DEVICE_ID_NCR_53C820
260 || dev->device == PCI_DEVICE_ID_NCR_53C825) {
261 unsigned long io_port;
262 unsigned char ctest4;
264 io_port = dev->resource[0].start;
265 ctest4 = inb(io_port+0x21);
266 if (!(ctest4 & 0x80)) {
267 printk("AlphaBook1 NCR init: setting"
269 outb(ctest4 | 0x80, io_port+0x21);
274 /* Do not set *ANY* level triggers for AlphaBook1. */
275 sio_fixup_irq_levels(0);
277 /* Make sure that register PR1 indicates 1Mb mem */
278 outb(0x0f, 0x3ce); orig = inb(0x3cf); /* read PR5 */
279 outb(0x0f, 0x3ce); outb(0x05, 0x3cf); /* unlock PR0-4 */
280 outb(0x0b, 0x3ce); config = inb(0x3cf); /* read PR1 */
281 if ((config & 0xc0) != 0xc0) {
282 printk("AlphaBook1 VGA init: setting 1Mb memory\n");
284 outb(0x0b, 0x3ce); outb(config, 0x3cf); /* write PR1 */
286 outb(0x0f, 0x3ce); outb(orig, 0x3cf); /* (re)lock PR0-4 */
290 sio_kill_arch(int mode)
292 #if defined(ALPHA_RESTORE_SRM_SETUP)
293 /* Since we cannot read the PCI DMA Window CSRs, we
294 * cannot restore them here.
296 * However, we CAN read the PIRQ route register, so restore it
299 pci_bus_write_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
300 saved_config.orig_route_tab);
309 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_BOOK1)
310 struct alpha_machine_vector alphabook1_mv __initmv = {
311 .vector_name = "AlphaBook1",
315 .machine_check = lca_machine_check,
316 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
317 .min_io_address = DEFAULT_IO_BASE,
318 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
321 .device_interrupt = isa_device_interrupt,
323 .init_arch = alphabook1_init_arch,
324 .init_irq = sio_init_irq,
325 .init_rtc = common_init_rtc,
326 .init_pci = alphabook1_init_pci,
327 .kill_arch = sio_kill_arch,
328 .pci_map_irq = noname_map_irq,
329 .pci_swizzle = common_swizzle,
332 /* NCR810 SCSI is 14, PCMCIA controller is 15. */
333 .route_tab = 0x0e0f0a0a,
339 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_AVANTI)
340 struct alpha_machine_vector avanti_mv __initmv = {
341 .vector_name = "Avanti",
345 .machine_check = apecs_machine_check,
346 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
347 .min_io_address = DEFAULT_IO_BASE,
348 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
351 .device_interrupt = isa_device_interrupt,
353 .init_arch = apecs_init_arch,
354 .init_irq = sio_init_irq,
355 .init_rtc = common_init_rtc,
356 .init_pci = noname_init_pci,
357 .kill_arch = sio_kill_arch,
358 .pci_map_irq = noname_map_irq,
359 .pci_swizzle = common_swizzle,
362 .route_tab = 0x0b0a050f, /* leave 14 for IDE, 9 for SND */
368 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_NONAME)
369 struct alpha_machine_vector noname_mv __initmv = {
370 .vector_name = "Noname",
374 .machine_check = lca_machine_check,
375 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
376 .min_io_address = DEFAULT_IO_BASE,
377 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
380 .device_interrupt = srm_device_interrupt,
382 .init_arch = lca_init_arch,
383 .init_irq = sio_init_irq,
384 .init_rtc = common_init_rtc,
385 .init_pci = noname_init_pci,
386 .kill_arch = sio_kill_arch,
387 .pci_map_irq = noname_map_irq,
388 .pci_swizzle = common_swizzle,
391 /* For UDB, the only available PCI slot must not map to IRQ 9,
392 since that's the builtin MSS sound chip. That PCI slot
393 will map to PIRQ1 (for INTA at least), so we give it IRQ 15
396 Unfortunately we have to do this for NONAME as well, since
397 they are co-indicated when the platform type "Noname" is
400 .route_tab = 0x0b0a0f0d,
406 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_P2K)
407 struct alpha_machine_vector p2k_mv __initmv = {
408 .vector_name = "Platform2000",
412 .machine_check = lca_machine_check,
413 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
414 .min_io_address = DEFAULT_IO_BASE,
415 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
418 .device_interrupt = srm_device_interrupt,
420 .init_arch = lca_init_arch,
421 .init_irq = sio_init_irq,
422 .init_rtc = common_init_rtc,
423 .init_pci = noname_init_pci,
424 .kill_arch = sio_kill_arch,
425 .pci_map_irq = p2k_map_irq,
426 .pci_swizzle = common_swizzle,
429 .route_tab = 0x0b0a090f,
435 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_XL)
436 struct alpha_machine_vector xl_mv __initmv = {
441 .machine_check = apecs_machine_check,
442 .max_isa_dma_address = ALPHA_XL_MAX_ISA_DMA_ADDRESS,
443 .min_io_address = DEFAULT_IO_BASE,
444 .min_mem_address = XL_DEFAULT_MEM_BASE,
447 .device_interrupt = isa_device_interrupt,
449 .init_arch = apecs_init_arch,
450 .init_irq = sio_init_irq,
451 .init_rtc = common_init_rtc,
452 .init_pci = noname_init_pci,
453 .kill_arch = sio_kill_arch,
454 .pci_map_irq = noname_map_irq,
455 .pci_swizzle = common_swizzle,
458 .route_tab = 0x0b0a090f,