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"
38 #if defined(ALPHA_RESTORE_SRM_SETUP)
39 /* Save LCA configuration data as the console had it set up. */
42 unsigned int orig_route_tab; /* for SAVE/RESTORE */
43 } saved_config __attribute((common));
51 alpha_mv.device_interrupt = srm_device_interrupt;
54 common_init_isa_dma();
57 static inline void __init
58 alphabook1_init_arch(void)
60 /* The AlphaBook1 has LCD video fixed at 800x600,
61 37 rows and 100 cols. */
62 screen_info.orig_y = 37;
63 screen_info.orig_video_cols = 100;
64 screen_info.orig_video_lines = 37;
71 * sio_route_tab selects irq routing in PCI/ISA bridge so that:
77 * This probably ought to be configurable via MILO. For
78 * example, sound boards seem to like using IRQ 9.
80 * This is NOT how we should do it. PIRQ0-X should have
81 * their own IRQs, the way intel uses the IO-APIC IRQs.
87 unsigned int orig_route_tab;
89 /* First, ALWAYS read and print the original setting. */
90 pci_bus_read_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
92 printk("%s: PIRQ original 0x%x new 0x%x\n", __func__,
93 orig_route_tab, alpha_mv.sys.sio.route_tab);
95 #if defined(ALPHA_RESTORE_SRM_SETUP)
96 saved_config.orig_route_tab = orig_route_tab;
99 /* Now override with desired setting. */
100 pci_bus_write_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
101 alpha_mv.sys.sio.route_tab);
104 static unsigned int __init
105 sio_collect_irq_levels(void)
107 unsigned int level_bits = 0;
108 struct pci_dev *dev = NULL;
110 /* Iterate through the devices, collecting IRQ levels. */
111 for_each_pci_dev(dev) {
112 if ((dev->class >> 16 == PCI_BASE_CLASS_BRIDGE) &&
113 (dev->class >> 8 != PCI_CLASS_BRIDGE_PCMCIA))
117 level_bits |= (1 << dev->irq);
123 sio_fixup_irq_levels(unsigned int level_bits)
125 unsigned int old_level_bits;
128 * Now, make all PCI interrupts level sensitive. Notice:
129 * these registers must be accessed byte-wise. inw()/outw()
132 * Make sure to turn off any level bits set for IRQs 9,10,11,15,
133 * so that the only bits getting set are for devices actually found.
134 * Note that we do preserve the remainder of the bits, which we hope
135 * will be set correctly by ARC/SRM.
137 * Note: we at least preserve any level-set bits on AlphaBook1
139 old_level_bits = inb(0x4d0) | (inb(0x4d1) << 8);
141 level_bits |= (old_level_bits & 0x71ff);
143 outb((level_bits >> 0) & 0xff, 0x4d0);
144 outb((level_bits >> 8) & 0xff, 0x4d1);
147 static inline int __init
148 noname_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
151 * The Noname board has 5 PCI slots with each of the 4
152 * interrupt pins routed to different pins on the PCI/ISA
153 * bridge (PIRQ0-PIRQ3). The table below is based on
154 * information available at:
156 * http://ftp.digital.com/pub/DEC/axppci/ref_interrupts.txt
158 * I have no information on the Avanti interrupt routing, but
159 * the routing seems to be identical to the Noname except
160 * that the Avanti has an additional slot whose routing I'm
163 * pirq_tab[0] is a fake entry to deal with old PCI boards
164 * that have the interrupt pin number hardwired to 0 (meaning
165 * that they use the default INTA line, if they are interrupt
168 static char irq_tab[][5] __initdata = {
170 { 3, 3, 3, 3, 3}, /* idsel 6 (53c810) */
171 {-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */
172 { 2, 2, -1, -1, -1}, /* idsel 8 (Hack: slot closest ISA) */
173 {-1, -1, -1, -1, -1}, /* idsel 9 (unused) */
174 {-1, -1, -1, -1, -1}, /* idsel 10 (unused) */
175 { 0, 0, 2, 1, 0}, /* idsel 11 KN25_PCI_SLOT0 */
176 { 1, 1, 0, 2, 1}, /* idsel 12 KN25_PCI_SLOT1 */
177 { 2, 2, 1, 0, 2}, /* idsel 13 KN25_PCI_SLOT2 */
178 { 0, 0, 0, 0, 0}, /* idsel 14 AS255 TULIP */
180 const long min_idsel = 6, max_idsel = 14, irqs_per_slot = 5;
181 int irq = COMMON_TABLE_LOOKUP, tmp;
182 tmp = __kernel_extbl(alpha_mv.sys.sio.route_tab, irq);
183 return irq >= 0 ? tmp : -1;
186 static inline int __init
187 p2k_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
189 static char irq_tab[][5] __initdata = {
191 { 0, 0, -1, -1, -1}, /* idsel 6 (53c810) */
192 {-1, -1, -1, -1, -1}, /* idsel 7 (SIO: PCI/ISA bridge) */
193 { 1, 1, 2, 3, 0}, /* idsel 8 (slot A) */
194 { 2, 2, 3, 0, 1}, /* idsel 9 (slot B) */
195 {-1, -1, -1, -1, -1}, /* idsel 10 (unused) */
196 {-1, -1, -1, -1, -1}, /* idsel 11 (unused) */
197 { 3, 3, -1, -1, -1}, /* idsel 12 (CMD0646) */
199 const long min_idsel = 6, max_idsel = 12, irqs_per_slot = 5;
200 int irq = COMMON_TABLE_LOOKUP, tmp;
201 tmp = __kernel_extbl(alpha_mv.sys.sio.route_tab, irq);
202 return irq >= 0 ? tmp : -1;
205 static inline void __init
206 noname_init_pci(void)
210 sio_fixup_irq_levels(sio_collect_irq_levels());
211 ns87312_enable_ide(0x26e);
214 static inline void __init
215 alphabook1_init_pci(void)
218 unsigned char orig, config;
224 * On the AlphaBook1, the PCMCIA chip (Cirrus 6729)
225 * is sensitive to PCI bus bursts, so we must DISABLE
226 * burst mode for the NCR 8xx SCSI... :-(
228 * Note that the NCR810 SCSI driver must preserve the
229 * setting of the bit in order for this to work. At the
230 * moment (2.0.29), ncr53c8xx.c does NOT do this, but
235 while ((dev = pci_get_device(PCI_VENDOR_ID_NCR, PCI_ANY_ID, dev))) {
236 if (dev->device == PCI_DEVICE_ID_NCR_53C810
237 || dev->device == PCI_DEVICE_ID_NCR_53C815
238 || dev->device == PCI_DEVICE_ID_NCR_53C820
239 || dev->device == PCI_DEVICE_ID_NCR_53C825) {
240 unsigned long io_port;
241 unsigned char ctest4;
243 io_port = dev->resource[0].start;
244 ctest4 = inb(io_port+0x21);
245 if (!(ctest4 & 0x80)) {
246 printk("AlphaBook1 NCR init: setting"
248 outb(ctest4 | 0x80, io_port+0x21);
253 /* Do not set *ANY* level triggers for AlphaBook1. */
254 sio_fixup_irq_levels(0);
256 /* Make sure that register PR1 indicates 1Mb mem */
257 outb(0x0f, 0x3ce); orig = inb(0x3cf); /* read PR5 */
258 outb(0x0f, 0x3ce); outb(0x05, 0x3cf); /* unlock PR0-4 */
259 outb(0x0b, 0x3ce); config = inb(0x3cf); /* read PR1 */
260 if ((config & 0xc0) != 0xc0) {
261 printk("AlphaBook1 VGA init: setting 1Mb memory\n");
263 outb(0x0b, 0x3ce); outb(config, 0x3cf); /* write PR1 */
265 outb(0x0f, 0x3ce); outb(orig, 0x3cf); /* (re)lock PR0-4 */
269 sio_kill_arch(int mode)
271 #if defined(ALPHA_RESTORE_SRM_SETUP)
272 /* Since we cannot read the PCI DMA Window CSRs, we
273 * cannot restore them here.
275 * However, we CAN read the PIRQ route register, so restore it
278 pci_bus_write_config_dword(pci_isa_hose->bus, PCI_DEVFN(7, 0), 0x60,
279 saved_config.orig_route_tab);
288 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_BOOK1)
289 struct alpha_machine_vector alphabook1_mv __initmv = {
290 .vector_name = "AlphaBook1",
294 .machine_check = lca_machine_check,
295 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
296 .min_io_address = DEFAULT_IO_BASE,
297 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
300 .device_interrupt = isa_device_interrupt,
302 .init_arch = alphabook1_init_arch,
303 .init_irq = sio_init_irq,
304 .init_rtc = common_init_rtc,
305 .init_pci = alphabook1_init_pci,
306 .kill_arch = sio_kill_arch,
307 .pci_map_irq = noname_map_irq,
308 .pci_swizzle = common_swizzle,
311 /* NCR810 SCSI is 14, PCMCIA controller is 15. */
312 .route_tab = 0x0e0f0a0a,
318 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_AVANTI)
319 struct alpha_machine_vector avanti_mv __initmv = {
320 .vector_name = "Avanti",
324 .machine_check = apecs_machine_check,
325 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
326 .min_io_address = DEFAULT_IO_BASE,
327 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
330 .device_interrupt = isa_device_interrupt,
332 .init_arch = apecs_init_arch,
333 .init_irq = sio_init_irq,
334 .init_rtc = common_init_rtc,
335 .init_pci = noname_init_pci,
336 .kill_arch = sio_kill_arch,
337 .pci_map_irq = noname_map_irq,
338 .pci_swizzle = common_swizzle,
341 .route_tab = 0x0b0a050f, /* leave 14 for IDE, 9 for SND */
347 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_NONAME)
348 struct alpha_machine_vector noname_mv __initmv = {
349 .vector_name = "Noname",
353 .machine_check = lca_machine_check,
354 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
355 .min_io_address = DEFAULT_IO_BASE,
356 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
359 .device_interrupt = srm_device_interrupt,
361 .init_arch = lca_init_arch,
362 .init_irq = sio_init_irq,
363 .init_rtc = common_init_rtc,
364 .init_pci = noname_init_pci,
365 .kill_arch = sio_kill_arch,
366 .pci_map_irq = noname_map_irq,
367 .pci_swizzle = common_swizzle,
370 /* For UDB, the only available PCI slot must not map to IRQ 9,
371 since that's the builtin MSS sound chip. That PCI slot
372 will map to PIRQ1 (for INTA at least), so we give it IRQ 15
375 Unfortunately we have to do this for NONAME as well, since
376 they are co-indicated when the platform type "Noname" is
379 .route_tab = 0x0b0a0f0d,
385 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_P2K)
386 struct alpha_machine_vector p2k_mv __initmv = {
387 .vector_name = "Platform2000",
391 .machine_check = lca_machine_check,
392 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
393 .min_io_address = DEFAULT_IO_BASE,
394 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
397 .device_interrupt = srm_device_interrupt,
399 .init_arch = lca_init_arch,
400 .init_irq = sio_init_irq,
401 .init_rtc = common_init_rtc,
402 .init_pci = noname_init_pci,
403 .kill_arch = sio_kill_arch,
404 .pci_map_irq = p2k_map_irq,
405 .pci_swizzle = common_swizzle,
408 .route_tab = 0x0b0a090f,
414 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_XL)
415 struct alpha_machine_vector xl_mv __initmv = {
420 .machine_check = apecs_machine_check,
421 .max_isa_dma_address = ALPHA_XL_MAX_ISA_DMA_ADDRESS,
422 .min_io_address = DEFAULT_IO_BASE,
423 .min_mem_address = XL_DEFAULT_MEM_BASE,
426 .device_interrupt = isa_device_interrupt,
428 .init_arch = apecs_init_arch,
429 .init_irq = sio_init_irq,
430 .init_rtc = common_init_rtc,
431 .init_pci = noname_init_pci,
432 .kill_arch = sio_kill_arch,
433 .pci_map_irq = noname_map_irq,
434 .pci_swizzle = common_swizzle,
437 .route_tab = 0x0b0a090f,