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Commit | Line | Data |
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89d63fe1 AN |
1 | /* |
2 | * linux/arch/mips/txx9/pci.c | |
3 | * | |
4 | * Based on linux/arch/mips/txx9/rbtx4927/setup.c, | |
70342287 | 5 | * linux/arch/mips/txx9/rbtx4938/setup.c, |
89d63fe1 AN |
6 | * and RBTX49xx patch from CELF patch archive. |
7 | * | |
8 | * Copyright 2001-2005 MontaVista Software Inc. | |
9 | * Copyright (C) 1996, 97, 2001, 04 Ralf Baechle (ralf@linux-mips.org) | |
10 | * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007 | |
11 | * | |
12 | * This file is subject to the terms and conditions of the GNU General Public | |
13 | * License. See the file "COPYING" in the main directory of this archive | |
14 | * for more details. | |
15 | */ | |
16 | #include <linux/delay.h> | |
17 | #include <linux/jiffies.h> | |
18 | #include <linux/io.h> | |
edcaf1a6 | 19 | #include <asm/txx9/generic.h> |
89d63fe1 AN |
20 | #include <asm/txx9/pci.h> |
21 | #ifdef CONFIG_TOSHIBA_FPCIB0 | |
22 | #include <linux/interrupt.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
89d63fe1 AN |
24 | #include <asm/i8259.h> |
25 | #include <asm/txx9/smsc_fdc37m81x.h> | |
26 | #endif | |
27 | ||
28 | static int __init | |
29 | early_read_config_word(struct pci_controller *hose, | |
30 | int top_bus, int bus, int devfn, int offset, u16 *value) | |
31 | { | |
89d63fe1 AN |
32 | struct pci_bus fake_bus; |
33 | ||
89d63fe1 AN |
34 | fake_bus.number = bus; |
35 | fake_bus.sysdata = hose; | |
36 | fake_bus.ops = hose->pci_ops; | |
37 | ||
38 | if (bus != top_bus) | |
39 | /* Fake a parent bus structure. */ | |
40 | fake_bus.parent = &fake_bus; | |
41 | else | |
42 | fake_bus.parent = NULL; | |
43 | ||
5f926354 | 44 | return pci_bus_read_config_word(&fake_bus, devfn, offset, value); |
89d63fe1 AN |
45 | } |
46 | ||
47 | int __init txx9_pci66_check(struct pci_controller *hose, int top_bus, | |
48 | int current_bus) | |
49 | { | |
50 | u32 pci_devfn; | |
51 | unsigned short vid; | |
52 | int cap66 = -1; | |
53 | u16 stat; | |
54 | ||
55 | /* It seems SLC90E66 needs some time after PCI reset... */ | |
56 | mdelay(80); | |
57 | ||
2cec11d8 | 58 | pr_info("PCI: Checking 66MHz capabilities...\n"); |
89d63fe1 AN |
59 | |
60 | for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) { | |
61 | if (PCI_FUNC(pci_devfn)) | |
62 | continue; | |
63 | if (early_read_config_word(hose, top_bus, current_bus, | |
64 | pci_devfn, PCI_VENDOR_ID, &vid) != | |
65 | PCIBIOS_SUCCESSFUL) | |
66 | continue; | |
67 | if (vid == 0xffff) | |
68 | continue; | |
69 | ||
70 | /* check 66MHz capability */ | |
71 | if (cap66 < 0) | |
72 | cap66 = 1; | |
73 | if (cap66) { | |
74 | early_read_config_word(hose, top_bus, current_bus, | |
75 | pci_devfn, PCI_STATUS, &stat); | |
76 | if (!(stat & PCI_STATUS_66MHZ)) { | |
2cec11d8 GU |
77 | pr_debug("PCI: %02x:%02x not 66MHz capable.\n", |
78 | current_bus, pci_devfn); | |
89d63fe1 AN |
79 | cap66 = 0; |
80 | break; | |
81 | } | |
82 | } | |
83 | } | |
84 | return cap66 > 0; | |
85 | } | |
86 | ||
87 | static struct resource primary_pci_mem_res[2] = { | |
88 | { .name = "PCI MEM" }, | |
89 | { .name = "PCI MMIO" }, | |
90 | }; | |
91 | static struct resource primary_pci_io_res = { .name = "PCI IO" }; | |
92 | struct pci_controller txx9_primary_pcic = { | |
93 | .mem_resource = &primary_pci_mem_res[0], | |
94 | .io_resource = &primary_pci_io_res, | |
95 | }; | |
96 | ||
97 | #ifdef CONFIG_64BIT | |
98 | int txx9_pci_mem_high __initdata = 1; | |
99 | #else | |
100 | int txx9_pci_mem_high __initdata; | |
101 | #endif | |
102 | ||
103 | /* | |
104 | * allocate pci_controller and resources. | |
70342287 | 105 | * mem_base, io_base: physical address. 0 for auto assignment. |
89d63fe1 AN |
106 | * mem_size and io_size means max size on auto assignment. |
107 | * pcic must be &txx9_primary_pcic or NULL. | |
108 | */ | |
109 | struct pci_controller *__init | |
110 | txx9_alloc_pci_controller(struct pci_controller *pcic, | |
111 | unsigned long mem_base, unsigned long mem_size, | |
112 | unsigned long io_base, unsigned long io_size) | |
113 | { | |
114 | struct pcic { | |
115 | struct pci_controller c; | |
116 | struct resource r_mem[2]; | |
117 | struct resource r_io; | |
118 | } *new = NULL; | |
119 | int min_size = 0x10000; | |
120 | ||
121 | if (!pcic) { | |
122 | new = kzalloc(sizeof(*new), GFP_KERNEL); | |
123 | if (!new) | |
124 | return NULL; | |
125 | new->r_mem[0].name = "PCI mem"; | |
126 | new->r_mem[1].name = "PCI mmio"; | |
127 | new->r_io.name = "PCI io"; | |
128 | new->c.mem_resource = new->r_mem; | |
129 | new->c.io_resource = &new->r_io; | |
130 | pcic = &new->c; | |
131 | } else | |
132 | BUG_ON(pcic != &txx9_primary_pcic); | |
133 | pcic->io_resource->flags = IORESOURCE_IO; | |
134 | ||
135 | /* | |
136 | * for auto assignment, first search a (big) region for PCI | |
137 | * MEM, then search a region for PCI IO. | |
138 | */ | |
139 | if (mem_base) { | |
140 | pcic->mem_resource[0].start = mem_base; | |
141 | pcic->mem_resource[0].end = mem_base + mem_size - 1; | |
142 | if (request_resource(&iomem_resource, &pcic->mem_resource[0])) | |
143 | goto free_and_exit; | |
144 | } else { | |
145 | unsigned long min = 0, max = 0x20000000; /* low 512MB */ | |
146 | if (!mem_size) { | |
147 | /* default size for auto assignment */ | |
148 | if (txx9_pci_mem_high) | |
149 | mem_size = 0x20000000; /* mem:512M(max) */ | |
150 | else | |
151 | mem_size = 0x08000000; /* mem:128M(max) */ | |
152 | } | |
153 | if (txx9_pci_mem_high) { | |
154 | min = 0x20000000; | |
155 | max = 0xe0000000; | |
156 | } | |
157 | /* search free region for PCI MEM */ | |
158 | for (; mem_size >= min_size; mem_size /= 2) { | |
159 | if (allocate_resource(&iomem_resource, | |
160 | &pcic->mem_resource[0], | |
161 | mem_size, min, max, | |
162 | mem_size, NULL, NULL) == 0) | |
163 | break; | |
164 | } | |
165 | if (mem_size < min_size) | |
166 | goto free_and_exit; | |
167 | } | |
168 | ||
169 | pcic->mem_resource[1].flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
170 | if (io_base) { | |
171 | pcic->mem_resource[1].start = io_base; | |
172 | pcic->mem_resource[1].end = io_base + io_size - 1; | |
173 | if (request_resource(&iomem_resource, &pcic->mem_resource[1])) | |
174 | goto release_and_exit; | |
175 | } else { | |
176 | if (!io_size) | |
177 | /* default size for auto assignment */ | |
178 | io_size = 0x01000000; /* io:16M(max) */ | |
179 | /* search free region for PCI IO in low 512MB */ | |
180 | for (; io_size >= min_size; io_size /= 2) { | |
181 | if (allocate_resource(&iomem_resource, | |
182 | &pcic->mem_resource[1], | |
183 | io_size, 0, 0x20000000, | |
184 | io_size, NULL, NULL) == 0) | |
185 | break; | |
186 | } | |
187 | if (io_size < min_size) | |
188 | goto release_and_exit; | |
189 | io_base = pcic->mem_resource[1].start; | |
190 | } | |
191 | ||
192 | pcic->mem_resource[0].flags = IORESOURCE_MEM; | |
193 | if (pcic == &txx9_primary_pcic && | |
194 | mips_io_port_base == (unsigned long)-1) { | |
195 | /* map ioport 0 to PCI I/O space address 0 */ | |
196 | set_io_port_base(IO_BASE + pcic->mem_resource[1].start); | |
197 | pcic->io_resource->start = 0; | |
198 | pcic->io_offset = 0; /* busaddr == ioaddr */ | |
199 | pcic->io_map_base = IO_BASE + pcic->mem_resource[1].start; | |
200 | } else { | |
201 | /* physaddr to ioaddr */ | |
202 | pcic->io_resource->start = | |
203 | io_base - (mips_io_port_base - IO_BASE); | |
204 | pcic->io_offset = io_base - (mips_io_port_base - IO_BASE); | |
205 | pcic->io_map_base = mips_io_port_base; | |
206 | } | |
207 | pcic->io_resource->end = pcic->io_resource->start + io_size - 1; | |
208 | ||
209 | pcic->mem_offset = 0; /* busaddr == physaddr */ | |
210 | ||
2cec11d8 GU |
211 | pr_info("PCI: IO %pR MEM %pR\n", &pcic->mem_resource[1], |
212 | &pcic->mem_resource[0]); | |
89d63fe1 AN |
213 | |
214 | /* register_pci_controller() will request MEM resource */ | |
215 | release_resource(&pcic->mem_resource[0]); | |
216 | return pcic; | |
217 | release_and_exit: | |
218 | release_resource(&pcic->mem_resource[0]); | |
219 | free_and_exit: | |
220 | kfree(new); | |
2cec11d8 | 221 | pr_err("PCI: Failed to allocate resources.\n"); |
89d63fe1 AN |
222 | return NULL; |
223 | } | |
224 | ||
225 | static int __init | |
226 | txx9_arch_pci_init(void) | |
227 | { | |
228 | PCIBIOS_MIN_IO = 0x8000; /* reseve legacy I/O space */ | |
229 | return 0; | |
230 | } | |
231 | arch_initcall(txx9_arch_pci_init); | |
232 | ||
233 | /* IRQ/IDSEL mapping */ | |
234 | int txx9_pci_option = | |
235 | #ifdef CONFIG_PICMG_PCI_BACKPLANE_DEFAULT | |
236 | TXX9_PCI_OPT_PICMG | | |
237 | #endif | |
238 | TXX9_PCI_OPT_CLK_AUTO; | |
239 | ||
240 | enum txx9_pci_err_action txx9_pci_err_action = TXX9_PCI_ERR_REPORT; | |
241 | ||
242 | #ifdef CONFIG_TOSHIBA_FPCIB0 | |
243 | static irqreturn_t i8259_interrupt(int irq, void *dev_id) | |
244 | { | |
245 | int isairq; | |
246 | ||
247 | isairq = i8259_irq(); | |
248 | if (unlikely(isairq <= I8259A_IRQ_BASE)) | |
249 | return IRQ_NONE; | |
250 | generic_handle_irq(isairq); | |
251 | return IRQ_HANDLED; | |
252 | } | |
253 | ||
28eb0e46 | 254 | static int txx9_i8259_irq_setup(int irq) |
89d63fe1 AN |
255 | { |
256 | int err; | |
257 | ||
258 | init_i8259_irqs(); | |
8b5690f8 | 259 | err = request_irq(irq, &i8259_interrupt, IRQF_SHARED, |
89d63fe1 AN |
260 | "cascade(i8259)", (void *)(long)irq); |
261 | if (!err) | |
2cec11d8 | 262 | pr_info("PCI-ISA bridge PIC (irq %d)\n", irq); |
89d63fe1 AN |
263 | return err; |
264 | } | |
265 | ||
bd721ea7 | 266 | static void __ref quirk_slc90e66_bridge(struct pci_dev *dev) |
89d63fe1 AN |
267 | { |
268 | int irq; /* PCI/ISA Bridge interrupt */ | |
269 | u8 reg_64; | |
270 | u32 reg_b0; | |
271 | u8 reg_e1; | |
272 | irq = pcibios_map_irq(dev, PCI_SLOT(dev->devfn), 1); /* INTA */ | |
273 | if (!irq) | |
274 | return; | |
275 | txx9_i8259_irq_setup(irq); | |
276 | pci_read_config_byte(dev, 0x64, ®_64); | |
277 | pci_read_config_dword(dev, 0xb0, ®_b0); | |
278 | pci_read_config_byte(dev, 0xe1, ®_e1); | |
279 | /* serial irq control */ | |
280 | reg_64 = 0xd0; | |
281 | /* serial irq pin */ | |
282 | reg_b0 |= 0x00010000; | |
283 | /* ide irq on isa14 */ | |
284 | reg_e1 &= 0xf0; | |
285 | reg_e1 |= 0x0d; | |
286 | pci_write_config_byte(dev, 0x64, reg_64); | |
287 | pci_write_config_dword(dev, 0xb0, reg_b0); | |
288 | pci_write_config_byte(dev, 0xe1, reg_e1); | |
289 | ||
290 | smsc_fdc37m81x_init(0x3f0); | |
291 | smsc_fdc37m81x_config_beg(); | |
292 | smsc_fdc37m81x_config_set(SMSC_FDC37M81X_DNUM, | |
293 | SMSC_FDC37M81X_KBD); | |
294 | smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT, 1); | |
295 | smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT2, 12); | |
296 | smsc_fdc37m81x_config_set(SMSC_FDC37M81X_ACTIVE, | |
297 | 1); | |
298 | smsc_fdc37m81x_config_end(); | |
299 | } | |
300 | ||
28eb0e46 | 301 | static void quirk_slc90e66_ide(struct pci_dev *dev) |
89d63fe1 AN |
302 | { |
303 | unsigned char dat; | |
304 | int regs[2] = {0x41, 0x43}; | |
305 | int i; | |
306 | ||
307 | /* SMSC SLC90E66 IDE uses irq 14, 15 (default) */ | |
308 | pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 14); | |
309 | pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &dat); | |
2cec11d8 | 310 | pr_info("PCI: %s: IRQ %02x", pci_name(dev), dat); |
89d63fe1 AN |
311 | /* enable SMSC SLC90E66 IDE */ |
312 | for (i = 0; i < ARRAY_SIZE(regs); i++) { | |
313 | pci_read_config_byte(dev, regs[i], &dat); | |
314 | pci_write_config_byte(dev, regs[i], dat | 0x80); | |
315 | pci_read_config_byte(dev, regs[i], &dat); | |
2cec11d8 | 316 | pr_cont(" IDETIM%d %02x", i, dat); |
89d63fe1 AN |
317 | } |
318 | pci_read_config_byte(dev, 0x5c, &dat); | |
319 | /* | |
320 | * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!! | |
321 | * | |
322 | * This line of code is intended to provide the user with a work | |
323 | * around solution to the anomalies cited in SMSC's anomaly sheet | |
324 | * entitled, "SLC90E66 Functional Rev.J_0.1 Anomalies"". | |
325 | * | |
326 | * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!! | |
327 | */ | |
328 | dat |= 0x01; | |
ad6f9022 | 329 | pci_write_config_byte(dev, 0x5c, dat); |
89d63fe1 | 330 | pci_read_config_byte(dev, 0x5c, &dat); |
2cec11d8 | 331 | pr_cont(" REG5C %02x\n", dat); |
89d63fe1 AN |
332 | } |
333 | #endif /* CONFIG_TOSHIBA_FPCIB0 */ | |
334 | ||
28eb0e46 | 335 | static void tc35815_fixup(struct pci_dev *dev) |
13680ade | 336 | { |
02582e9b | 337 | /* This device may have PM registers but not they are not supported. */ |
13680ade AN |
338 | if (dev->pm_cap) { |
339 | dev_info(&dev->dev, "PM disabled\n"); | |
340 | dev->pm_cap = 0; | |
341 | } | |
342 | } | |
343 | ||
28eb0e46 | 344 | static void final_fixup(struct pci_dev *dev) |
89d63fe1 AN |
345 | { |
346 | unsigned char bist; | |
347 | ||
348 | /* Do build-in self test */ | |
349 | if (pci_read_config_byte(dev, PCI_BIST, &bist) == PCIBIOS_SUCCESSFUL && | |
350 | (bist & PCI_BIST_CAPABLE)) { | |
351 | unsigned long timeout; | |
352 | pci_set_power_state(dev, PCI_D0); | |
2cec11d8 | 353 | pr_info("PCI: %s BIST...", pci_name(dev)); |
89d63fe1 AN |
354 | pci_write_config_byte(dev, PCI_BIST, PCI_BIST_START); |
355 | timeout = jiffies + HZ * 2; /* timeout after 2 sec */ | |
356 | do { | |
357 | pci_read_config_byte(dev, PCI_BIST, &bist); | |
358 | if (time_after(jiffies, timeout)) | |
359 | break; | |
360 | } while (bist & PCI_BIST_START); | |
361 | if (bist & (PCI_BIST_CODE_MASK | PCI_BIST_START)) | |
2cec11d8 | 362 | pr_cont("failed. (0x%x)\n", bist); |
89d63fe1 | 363 | else |
2cec11d8 | 364 | pr_cont("OK.\n"); |
89d63fe1 AN |
365 | } |
366 | } | |
367 | ||
368 | #ifdef CONFIG_TOSHIBA_FPCIB0 | |
369 | #define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460 | |
370 | DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_0, | |
371 | quirk_slc90e66_bridge); | |
372 | DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1, | |
373 | quirk_slc90e66_ide); | |
374 | DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1, | |
375 | quirk_slc90e66_ide); | |
376 | #endif | |
13680ade AN |
377 | DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TOSHIBA_2, |
378 | PCI_DEVICE_ID_TOSHIBA_TC35815_NWU, tc35815_fixup); | |
379 | DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TOSHIBA_2, | |
380 | PCI_DEVICE_ID_TOSHIBA_TC35815_TX4939, tc35815_fixup); | |
89d63fe1 AN |
381 | DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, final_fixup); |
382 | DECLARE_PCI_FIXUP_RESUME(PCI_ANY_ID, PCI_ANY_ID, final_fixup); | |
edcaf1a6 AN |
383 | |
384 | int pcibios_plat_dev_init(struct pci_dev *dev) | |
385 | { | |
386 | return 0; | |
387 | } | |
388 | ||
19a8d6b7 LP |
389 | static int (*txx9_pci_map_irq)(const struct pci_dev *dev, u8 slot, u8 pin); |
390 | int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) | |
edcaf1a6 | 391 | { |
19a8d6b7 | 392 | return txx9_pci_map_irq(dev, slot, pin); |
edcaf1a6 | 393 | } |
07517529 | 394 | |
938ca516 | 395 | char * (*txx9_board_pcibios_setup)(char *str) __initdata; |
07517529 | 396 | |
938ca516 | 397 | char *__init txx9_pcibios_setup(char *str) |
07517529 AN |
398 | { |
399 | if (txx9_board_pcibios_setup && !txx9_board_pcibios_setup(str)) | |
400 | return NULL; | |
401 | if (!strcmp(str, "picmg")) { | |
402 | /* PICMG compliant backplane (TOSHIBA JMB-PICMG-ATX | |
403 | (5V or 3.3V), JMB-PICMG-L2 (5V only), etc.) */ | |
404 | txx9_pci_option |= TXX9_PCI_OPT_PICMG; | |
405 | return NULL; | |
406 | } else if (!strcmp(str, "nopicmg")) { | |
407 | /* non-PICMG compliant backplane (TOSHIBA | |
408 | RBHBK4100,RBHBK4200, Interface PCM-PCM05, etc.) */ | |
409 | txx9_pci_option &= ~TXX9_PCI_OPT_PICMG; | |
410 | return NULL; | |
411 | } else if (!strncmp(str, "clk=", 4)) { | |
412 | char *val = str + 4; | |
413 | txx9_pci_option &= ~TXX9_PCI_OPT_CLK_MASK; | |
414 | if (strcmp(val, "33") == 0) | |
415 | txx9_pci_option |= TXX9_PCI_OPT_CLK_33; | |
416 | else if (strcmp(val, "66") == 0) | |
417 | txx9_pci_option |= TXX9_PCI_OPT_CLK_66; | |
418 | else /* "auto" */ | |
419 | txx9_pci_option |= TXX9_PCI_OPT_CLK_AUTO; | |
420 | return NULL; | |
421 | } else if (!strncmp(str, "err=", 4)) { | |
422 | if (!strcmp(str + 4, "panic")) | |
423 | txx9_pci_err_action = TXX9_PCI_ERR_PANIC; | |
424 | else if (!strcmp(str + 4, "ignore")) | |
425 | txx9_pci_err_action = TXX9_PCI_ERR_IGNORE; | |
426 | return NULL; | |
427 | } | |
19a8d6b7 LP |
428 | |
429 | txx9_pci_map_irq = txx9_board_vec->pci_map_irq; | |
430 | ||
07517529 AN |
431 | return str; |
432 | } |