]>
Commit | Line | Data |
---|---|---|
884d04cd IK |
1 | /* |
2 | * Support for Celleb PCI-Express. | |
3 | * | |
4 | * (C) Copyright 2007-2008 TOSHIBA CORPORATION | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
20 | ||
21 | #undef DEBUG | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/string.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
884d04cd IK |
27 | #include <linux/init.h> |
28 | #include <linux/bootmem.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/interrupt.h> | |
31 | ||
32 | #include <asm/io.h> | |
33 | #include <asm/irq.h> | |
34 | #include <asm/iommu.h> | |
35 | #include <asm/byteorder.h> | |
36 | ||
37 | #include "celleb_scc.h" | |
38 | #include "celleb_pci.h" | |
39 | ||
24caa6a0 AV |
40 | #define PEX_IN(base, off) in_be32((void __iomem *)(base) + (off)) |
41 | #define PEX_OUT(base, off, data) out_be32((void __iomem *)(base) + (off), (data)) | |
884d04cd IK |
42 | |
43 | static void scc_pciex_io_flush(struct iowa_bus *bus) | |
44 | { | |
45 | (void)PEX_IN(bus->phb->cfg_addr, PEXDMRDEN0); | |
46 | } | |
47 | ||
48 | /* | |
49 | * Memory space access to device on PCIEX | |
50 | */ | |
51 | #define PCIEX_MMIO_READ(name, ret) \ | |
52 | static ret scc_pciex_##name(const PCI_IO_ADDR addr) \ | |
53 | { \ | |
54 | ret val = __do_##name(addr); \ | |
55 | scc_pciex_io_flush(iowa_mem_find_bus(addr)); \ | |
56 | return val; \ | |
57 | } | |
58 | ||
59 | #define PCIEX_MMIO_READ_STR(name) \ | |
60 | static void scc_pciex_##name(const PCI_IO_ADDR addr, void *buf, \ | |
61 | unsigned long count) \ | |
62 | { \ | |
63 | __do_##name(addr, buf, count); \ | |
64 | scc_pciex_io_flush(iowa_mem_find_bus(addr)); \ | |
65 | } | |
66 | ||
67 | PCIEX_MMIO_READ(readb, u8) | |
68 | PCIEX_MMIO_READ(readw, u16) | |
69 | PCIEX_MMIO_READ(readl, u32) | |
70 | PCIEX_MMIO_READ(readq, u64) | |
71 | PCIEX_MMIO_READ(readw_be, u16) | |
72 | PCIEX_MMIO_READ(readl_be, u32) | |
73 | PCIEX_MMIO_READ(readq_be, u64) | |
74 | PCIEX_MMIO_READ_STR(readsb) | |
75 | PCIEX_MMIO_READ_STR(readsw) | |
76 | PCIEX_MMIO_READ_STR(readsl) | |
77 | ||
78 | static void scc_pciex_memcpy_fromio(void *dest, const PCI_IO_ADDR src, | |
79 | unsigned long n) | |
80 | { | |
81 | __do_memcpy_fromio(dest, src, n); | |
82 | scc_pciex_io_flush(iowa_mem_find_bus(src)); | |
83 | } | |
84 | ||
85 | /* | |
86 | * I/O port access to devices on PCIEX. | |
87 | */ | |
88 | ||
89 | static inline unsigned long get_bus_address(struct pci_controller *phb, | |
90 | unsigned long port) | |
91 | { | |
92 | return port - ((unsigned long)(phb->io_base_virt) - _IO_BASE); | |
93 | } | |
94 | ||
95 | static u32 scc_pciex_read_port(struct pci_controller *phb, | |
96 | unsigned long port, int size) | |
97 | { | |
98 | unsigned int byte_enable; | |
99 | unsigned int cmd, shift; | |
100 | unsigned long addr; | |
101 | u32 data, ret; | |
102 | ||
103 | BUG_ON(((port & 0x3ul) + size) > 4); | |
104 | ||
105 | addr = get_bus_address(phb, port); | |
106 | shift = addr & 0x3ul; | |
107 | byte_enable = ((1 << size) - 1) << shift; | |
108 | cmd = PEXDCMND_IO_READ | (byte_enable << PEXDCMND_BYTE_EN_SHIFT); | |
109 | PEX_OUT(phb->cfg_addr, PEXDADRS, (addr & ~0x3ul)); | |
110 | PEX_OUT(phb->cfg_addr, PEXDCMND, cmd); | |
111 | data = PEX_IN(phb->cfg_addr, PEXDRDATA); | |
112 | ret = (data >> (shift * 8)) & (0xFFFFFFFF >> ((4 - size) * 8)); | |
113 | ||
114 | pr_debug("PCIEX:PIO READ:port=0x%lx, addr=0x%lx, size=%d, be=%x," | |
115 | " cmd=%x, data=%x, ret=%x\n", port, addr, size, byte_enable, | |
116 | cmd, data, ret); | |
117 | ||
118 | return ret; | |
119 | } | |
120 | ||
121 | static void scc_pciex_write_port(struct pci_controller *phb, | |
122 | unsigned long port, int size, u32 val) | |
123 | { | |
124 | unsigned int byte_enable; | |
125 | unsigned int cmd, shift; | |
126 | unsigned long addr; | |
127 | u32 data; | |
128 | ||
129 | BUG_ON(((port & 0x3ul) + size) > 4); | |
130 | ||
131 | addr = get_bus_address(phb, port); | |
132 | shift = addr & 0x3ul; | |
133 | byte_enable = ((1 << size) - 1) << shift; | |
134 | cmd = PEXDCMND_IO_WRITE | (byte_enable << PEXDCMND_BYTE_EN_SHIFT); | |
135 | data = (val & (0xFFFFFFFF >> (4 - size) * 8)) << (shift * 8); | |
136 | PEX_OUT(phb->cfg_addr, PEXDADRS, (addr & ~0x3ul)); | |
137 | PEX_OUT(phb->cfg_addr, PEXDCMND, cmd); | |
138 | PEX_OUT(phb->cfg_addr, PEXDWDATA, data); | |
139 | ||
140 | pr_debug("PCIEX:PIO WRITE:port=0x%lx, addr=%lx, size=%d, val=%x," | |
141 | " be=%x, cmd=%x, data=%x\n", port, addr, size, val, | |
142 | byte_enable, cmd, data); | |
143 | } | |
144 | ||
145 | static u8 __scc_pciex_inb(struct pci_controller *phb, unsigned long port) | |
146 | { | |
147 | return (u8)scc_pciex_read_port(phb, port, 1); | |
148 | } | |
149 | ||
150 | static u16 __scc_pciex_inw(struct pci_controller *phb, unsigned long port) | |
151 | { | |
152 | u32 data; | |
153 | if ((port & 0x3ul) < 3) | |
154 | data = scc_pciex_read_port(phb, port, 2); | |
155 | else { | |
156 | u32 d1 = scc_pciex_read_port(phb, port, 1); | |
157 | u32 d2 = scc_pciex_read_port(phb, port + 1, 1); | |
158 | data = d1 | (d2 << 8); | |
159 | } | |
160 | return (u16)data; | |
161 | } | |
162 | ||
163 | static u32 __scc_pciex_inl(struct pci_controller *phb, unsigned long port) | |
164 | { | |
165 | unsigned int mod = port & 0x3ul; | |
166 | u32 data; | |
167 | if (mod == 0) | |
168 | data = scc_pciex_read_port(phb, port, 4); | |
169 | else { | |
170 | u32 d1 = scc_pciex_read_port(phb, port, 4 - mod); | |
171 | u32 d2 = scc_pciex_read_port(phb, port + 1, mod); | |
172 | data = d1 | (d2 << (mod * 8)); | |
173 | } | |
174 | return data; | |
175 | } | |
176 | ||
177 | static void __scc_pciex_outb(struct pci_controller *phb, | |
178 | u8 val, unsigned long port) | |
179 | { | |
180 | scc_pciex_write_port(phb, port, 1, (u32)val); | |
181 | } | |
182 | ||
183 | static void __scc_pciex_outw(struct pci_controller *phb, | |
184 | u16 val, unsigned long port) | |
185 | { | |
186 | if ((port & 0x3ul) < 3) | |
187 | scc_pciex_write_port(phb, port, 2, (u32)val); | |
188 | else { | |
189 | u32 d1 = val & 0x000000FF; | |
190 | u32 d2 = (val & 0x0000FF00) >> 8; | |
191 | scc_pciex_write_port(phb, port, 1, d1); | |
192 | scc_pciex_write_port(phb, port + 1, 1, d2); | |
193 | } | |
194 | } | |
195 | ||
196 | static void __scc_pciex_outl(struct pci_controller *phb, | |
197 | u32 val, unsigned long port) | |
198 | { | |
199 | unsigned int mod = port & 0x3ul; | |
200 | if (mod == 0) | |
201 | scc_pciex_write_port(phb, port, 4, val); | |
202 | else { | |
203 | u32 d1 = val & (0xFFFFFFFFul >> (mod * 8)); | |
204 | u32 d2 = val >> ((4 - mod) * 8); | |
205 | scc_pciex_write_port(phb, port, 4 - mod, d1); | |
206 | scc_pciex_write_port(phb, port + 1, mod, d2); | |
207 | } | |
208 | } | |
209 | ||
210 | #define PCIEX_PIO_FUNC(size, name) \ | |
211 | static u##size scc_pciex_in##name(unsigned long port) \ | |
212 | { \ | |
213 | struct iowa_bus *bus = iowa_pio_find_bus(port); \ | |
214 | u##size data = __scc_pciex_in##name(bus->phb, port); \ | |
215 | scc_pciex_io_flush(bus); \ | |
216 | return data; \ | |
217 | } \ | |
218 | static void scc_pciex_ins##name(unsigned long p, void *b, unsigned long c) \ | |
219 | { \ | |
220 | struct iowa_bus *bus = iowa_pio_find_bus(p); \ | |
c409d52b | 221 | __le##size *dst = b; \ |
884d04cd IK |
222 | for (; c != 0; c--, dst++) \ |
223 | *dst = cpu_to_le##size(__scc_pciex_in##name(bus->phb, p)); \ | |
224 | scc_pciex_io_flush(bus); \ | |
225 | } \ | |
226 | static void scc_pciex_out##name(u##size val, unsigned long port) \ | |
227 | { \ | |
228 | struct iowa_bus *bus = iowa_pio_find_bus(port); \ | |
229 | __scc_pciex_out##name(bus->phb, val, port); \ | |
230 | } \ | |
231 | static void scc_pciex_outs##name(unsigned long p, const void *b, \ | |
232 | unsigned long c) \ | |
233 | { \ | |
234 | struct iowa_bus *bus = iowa_pio_find_bus(p); \ | |
c409d52b | 235 | const __le##size *src = b; \ |
884d04cd IK |
236 | for (; c != 0; c--, src++) \ |
237 | __scc_pciex_out##name(bus->phb, le##size##_to_cpu(*src), p); \ | |
238 | } | |
c409d52b | 239 | #define __le8 u8 |
884d04cd IK |
240 | #define cpu_to_le8(x) (x) |
241 | #define le8_to_cpu(x) (x) | |
242 | PCIEX_PIO_FUNC(8, b) | |
243 | PCIEX_PIO_FUNC(16, w) | |
244 | PCIEX_PIO_FUNC(32, l) | |
245 | ||
246 | static struct ppc_pci_io scc_pciex_ops = { | |
247 | .readb = scc_pciex_readb, | |
248 | .readw = scc_pciex_readw, | |
249 | .readl = scc_pciex_readl, | |
250 | .readq = scc_pciex_readq, | |
251 | .readw_be = scc_pciex_readw_be, | |
252 | .readl_be = scc_pciex_readl_be, | |
253 | .readq_be = scc_pciex_readq_be, | |
254 | .readsb = scc_pciex_readsb, | |
255 | .readsw = scc_pciex_readsw, | |
256 | .readsl = scc_pciex_readsl, | |
257 | .memcpy_fromio = scc_pciex_memcpy_fromio, | |
258 | .inb = scc_pciex_inb, | |
259 | .inw = scc_pciex_inw, | |
260 | .inl = scc_pciex_inl, | |
261 | .outb = scc_pciex_outb, | |
262 | .outw = scc_pciex_outw, | |
263 | .outl = scc_pciex_outl, | |
264 | .insb = scc_pciex_insb, | |
265 | .insw = scc_pciex_insw, | |
266 | .insl = scc_pciex_insl, | |
267 | .outsb = scc_pciex_outsb, | |
268 | .outsw = scc_pciex_outsw, | |
269 | .outsl = scc_pciex_outsl, | |
270 | }; | |
271 | ||
272 | static int __init scc_pciex_iowa_init(struct iowa_bus *bus, void *data) | |
273 | { | |
274 | dma_addr_t dummy_page_da; | |
275 | void *dummy_page_va; | |
276 | ||
277 | dummy_page_va = kmalloc(PAGE_SIZE, GFP_KERNEL); | |
278 | if (!dummy_page_va) { | |
279 | pr_err("PCIEX:Alloc dummy_page_va failed\n"); | |
280 | return -1; | |
281 | } | |
282 | ||
283 | dummy_page_da = dma_map_single(bus->phb->parent, dummy_page_va, | |
284 | PAGE_SIZE, DMA_FROM_DEVICE); | |
8d8bb39b | 285 | if (dma_mapping_error(bus->phb->parent, dummy_page_da)) { |
884d04cd IK |
286 | pr_err("PCIEX:Map dummy page failed.\n"); |
287 | kfree(dummy_page_va); | |
288 | return -1; | |
289 | } | |
290 | ||
291 | PEX_OUT(bus->phb->cfg_addr, PEXDMRDADR0, dummy_page_da); | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | /* | |
297 | * config space access | |
298 | */ | |
299 | #define MK_PEXDADRS(bus_no, dev_no, func_no, addr) \ | |
300 | ((uint32_t)(((addr) & ~0x3UL) | \ | |
301 | ((bus_no) << PEXDADRS_BUSNO_SHIFT) | \ | |
302 | ((dev_no) << PEXDADRS_DEVNO_SHIFT) | \ | |
303 | ((func_no) << PEXDADRS_FUNCNO_SHIFT))) | |
304 | ||
305 | #define MK_PEXDCMND_BYTE_EN(addr, size) \ | |
306 | ((((0x1 << (size))-1) << ((addr) & 0x3)) << PEXDCMND_BYTE_EN_SHIFT) | |
307 | #define MK_PEXDCMND(cmd, addr, size) ((cmd) | MK_PEXDCMND_BYTE_EN(addr, size)) | |
308 | ||
24caa6a0 | 309 | static uint32_t config_read_pciex_dev(unsigned int __iomem *base, |
884d04cd IK |
310 | uint64_t bus_no, uint64_t dev_no, uint64_t func_no, |
311 | uint64_t off, uint64_t size) | |
312 | { | |
313 | uint32_t ret; | |
314 | uint32_t addr, cmd; | |
315 | ||
316 | addr = MK_PEXDADRS(bus_no, dev_no, func_no, off); | |
317 | cmd = MK_PEXDCMND(PEXDCMND_CONFIG_READ, off, size); | |
318 | PEX_OUT(base, PEXDADRS, addr); | |
319 | PEX_OUT(base, PEXDCMND, cmd); | |
320 | ret = (PEX_IN(base, PEXDRDATA) | |
321 | >> ((off & (4-size)) * 8)) & ((0x1 << (size * 8)) - 1); | |
322 | return ret; | |
323 | } | |
324 | ||
24caa6a0 | 325 | static void config_write_pciex_dev(unsigned int __iomem *base, uint64_t bus_no, |
884d04cd IK |
326 | uint64_t dev_no, uint64_t func_no, uint64_t off, uint64_t size, |
327 | uint32_t data) | |
328 | { | |
329 | uint32_t addr, cmd; | |
330 | ||
331 | addr = MK_PEXDADRS(bus_no, dev_no, func_no, off); | |
332 | cmd = MK_PEXDCMND(PEXDCMND_CONFIG_WRITE, off, size); | |
333 | PEX_OUT(base, PEXDADRS, addr); | |
334 | PEX_OUT(base, PEXDCMND, cmd); | |
335 | PEX_OUT(base, PEXDWDATA, | |
336 | (data & ((0x1 << (size * 8)) - 1)) << ((off & (4-size)) * 8)); | |
337 | } | |
338 | ||
339 | #define MK_PEXCADRS_BYTE_EN(off, len) \ | |
340 | ((((0x1 << (len)) - 1) << ((off) & 0x3)) << PEXCADRS_BYTE_EN_SHIFT) | |
341 | #define MK_PEXCADRS(cmd, addr, size) \ | |
342 | ((cmd) | MK_PEXCADRS_BYTE_EN(addr, size) | ((addr) & ~0x3)) | |
24caa6a0 | 343 | static uint32_t config_read_pciex_rc(unsigned int __iomem *base, |
884d04cd IK |
344 | uint32_t where, uint32_t size) |
345 | { | |
346 | PEX_OUT(base, PEXCADRS, MK_PEXCADRS(PEXCADRS_CMD_READ, where, size)); | |
347 | return (PEX_IN(base, PEXCRDATA) | |
348 | >> ((where & (4 - size)) * 8)) & ((0x1 << (size * 8)) - 1); | |
349 | } | |
350 | ||
24caa6a0 | 351 | static void config_write_pciex_rc(unsigned int __iomem *base, uint32_t where, |
884d04cd IK |
352 | uint32_t size, uint32_t val) |
353 | { | |
354 | uint32_t data; | |
355 | ||
356 | data = (val & ((0x1 << (size * 8)) - 1)) << ((where & (4 - size)) * 8); | |
357 | PEX_OUT(base, PEXCADRS, MK_PEXCADRS(PEXCADRS_CMD_WRITE, where, size)); | |
358 | PEX_OUT(base, PEXCWDATA, data); | |
359 | } | |
360 | ||
361 | /* Interfaces */ | |
362 | /* Note: Work-around | |
363 | * On SCC PCIEXC, one device is seen on all 32 dev_no. | |
364 | * As SCC PCIEXC can have only one device on the bus, we look only one dev_no. | |
365 | * (dev_no = 1) | |
366 | */ | |
367 | static int scc_pciex_read_config(struct pci_bus *bus, unsigned int devfn, | |
368 | int where, int size, unsigned int *val) | |
369 | { | |
58513dc4 | 370 | struct pci_controller *phb = pci_bus_to_host(bus); |
884d04cd IK |
371 | |
372 | if (bus->number == phb->first_busno && PCI_SLOT(devfn) != 1) { | |
373 | *val = ~0; | |
374 | return PCIBIOS_DEVICE_NOT_FOUND; | |
375 | } | |
376 | ||
377 | if (bus->number == 0 && PCI_SLOT(devfn) == 0) | |
378 | *val = config_read_pciex_rc(phb->cfg_addr, where, size); | |
379 | else | |
380 | *val = config_read_pciex_dev(phb->cfg_addr, bus->number, | |
381 | PCI_SLOT(devfn), PCI_FUNC(devfn), where, size); | |
382 | ||
383 | return PCIBIOS_SUCCESSFUL; | |
384 | } | |
385 | ||
386 | static int scc_pciex_write_config(struct pci_bus *bus, unsigned int devfn, | |
387 | int where, int size, unsigned int val) | |
388 | { | |
58513dc4 | 389 | struct pci_controller *phb = pci_bus_to_host(bus); |
884d04cd IK |
390 | |
391 | if (bus->number == phb->first_busno && PCI_SLOT(devfn) != 1) | |
392 | return PCIBIOS_DEVICE_NOT_FOUND; | |
393 | ||
394 | if (bus->number == 0 && PCI_SLOT(devfn) == 0) | |
395 | config_write_pciex_rc(phb->cfg_addr, where, size, val); | |
396 | else | |
397 | config_write_pciex_dev(phb->cfg_addr, bus->number, | |
398 | PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val); | |
399 | return PCIBIOS_SUCCESSFUL; | |
400 | } | |
401 | ||
402 | static struct pci_ops scc_pciex_pci_ops = { | |
403 | scc_pciex_read_config, | |
404 | scc_pciex_write_config, | |
405 | }; | |
406 | ||
24caa6a0 | 407 | static void pciex_clear_intr_all(unsigned int __iomem *base) |
884d04cd IK |
408 | { |
409 | PEX_OUT(base, PEXAERRSTS, 0xffffffff); | |
410 | PEX_OUT(base, PEXPRERRSTS, 0xffffffff); | |
411 | PEX_OUT(base, PEXINTSTS, 0xffffffff); | |
412 | } | |
413 | ||
414 | #if 0 | |
415 | static void pciex_disable_intr_all(unsigned int *base) | |
416 | { | |
417 | PEX_OUT(base, PEXINTMASK, 0x0); | |
418 | PEX_OUT(base, PEXAERRMASK, 0x0); | |
419 | PEX_OUT(base, PEXPRERRMASK, 0x0); | |
420 | PEX_OUT(base, PEXVDMASK, 0x0); | |
421 | } | |
422 | #endif | |
423 | ||
24caa6a0 | 424 | static void pciex_enable_intr_all(unsigned int __iomem *base) |
884d04cd IK |
425 | { |
426 | PEX_OUT(base, PEXINTMASK, 0x0000e7f1); | |
427 | PEX_OUT(base, PEXAERRMASK, 0x03ff01ff); | |
428 | PEX_OUT(base, PEXPRERRMASK, 0x0001010f); | |
429 | PEX_OUT(base, PEXVDMASK, 0x00000001); | |
430 | } | |
431 | ||
24caa6a0 | 432 | static void pciex_check_status(unsigned int __iomem *base) |
884d04cd IK |
433 | { |
434 | uint32_t err = 0; | |
435 | uint32_t intsts, aerr, prerr, rcvcp, lenerr; | |
436 | uint32_t maea, maec; | |
437 | ||
438 | intsts = PEX_IN(base, PEXINTSTS); | |
439 | aerr = PEX_IN(base, PEXAERRSTS); | |
440 | prerr = PEX_IN(base, PEXPRERRSTS); | |
441 | rcvcp = PEX_IN(base, PEXRCVCPLIDA); | |
442 | lenerr = PEX_IN(base, PEXLENERRIDA); | |
443 | ||
444 | if (intsts || aerr || prerr || rcvcp || lenerr) | |
445 | err = 1; | |
446 | ||
447 | pr_info("PCEXC interrupt!!\n"); | |
448 | pr_info("PEXINTSTS :0x%08x\n", intsts); | |
449 | pr_info("PEXAERRSTS :0x%08x\n", aerr); | |
450 | pr_info("PEXPRERRSTS :0x%08x\n", prerr); | |
451 | pr_info("PEXRCVCPLIDA :0x%08x\n", rcvcp); | |
452 | pr_info("PEXLENERRIDA :0x%08x\n", lenerr); | |
453 | ||
454 | /* print detail of Protection Error */ | |
455 | if (intsts & 0x00004000) { | |
456 | uint32_t i, n; | |
457 | for (i = 0; i < 4; i++) { | |
458 | n = 1 << i; | |
459 | if (prerr & n) { | |
460 | maea = PEX_IN(base, PEXMAEA(i)); | |
461 | maec = PEX_IN(base, PEXMAEC(i)); | |
462 | pr_info("PEXMAEC%d :0x%08x\n", i, maec); | |
463 | pr_info("PEXMAEA%d :0x%08x\n", i, maea); | |
464 | } | |
465 | } | |
466 | } | |
467 | ||
468 | if (err) | |
469 | pciex_clear_intr_all(base); | |
470 | } | |
471 | ||
472 | static irqreturn_t pciex_handle_internal_irq(int irq, void *dev_id) | |
473 | { | |
474 | struct pci_controller *phb = dev_id; | |
475 | ||
476 | pr_debug("PCIEX:pciex_handle_internal_irq(irq=%d)\n", irq); | |
477 | ||
478 | BUG_ON(phb->cfg_addr == NULL); | |
479 | ||
480 | pciex_check_status(phb->cfg_addr); | |
481 | ||
482 | return IRQ_HANDLED; | |
483 | } | |
484 | ||
485 | static __init int celleb_setup_pciex(struct device_node *node, | |
486 | struct pci_controller *phb) | |
487 | { | |
488 | struct resource r; | |
489 | struct of_irq oirq; | |
490 | int virq; | |
491 | ||
492 | /* SMMIO registers; used inside this file */ | |
493 | if (of_address_to_resource(node, 0, &r)) { | |
494 | pr_err("PCIEXC:Failed to get config resource.\n"); | |
495 | return 1; | |
496 | } | |
497 | phb->cfg_addr = ioremap(r.start, r.end - r.start + 1); | |
498 | if (!phb->cfg_addr) { | |
499 | pr_err("PCIEXC:Failed to remap SMMIO region.\n"); | |
500 | return 1; | |
501 | } | |
502 | ||
503 | /* Not use cfg_data, cmd and data regs are near address reg */ | |
504 | phb->cfg_data = NULL; | |
505 | ||
506 | /* set pci_ops */ | |
507 | phb->ops = &scc_pciex_pci_ops; | |
508 | ||
509 | /* internal interrupt handler */ | |
510 | if (of_irq_map_one(node, 1, &oirq)) { | |
511 | pr_err("PCIEXC:Failed to map irq\n"); | |
512 | goto error; | |
513 | } | |
514 | virq = irq_create_of_mapping(oirq.controller, oirq.specifier, | |
515 | oirq.size); | |
516 | if (request_irq(virq, pciex_handle_internal_irq, | |
517 | IRQF_DISABLED, "pciex", (void *)phb)) { | |
518 | pr_err("PCIEXC:Failed to request irq\n"); | |
519 | goto error; | |
520 | } | |
521 | ||
522 | /* enable all interrupts */ | |
523 | pciex_clear_intr_all(phb->cfg_addr); | |
524 | pciex_enable_intr_all(phb->cfg_addr); | |
525 | /* MSI: TBD */ | |
526 | ||
527 | return 0; | |
528 | ||
529 | error: | |
530 | phb->cfg_data = NULL; | |
531 | if (phb->cfg_addr) | |
532 | iounmap(phb->cfg_addr); | |
533 | phb->cfg_addr = NULL; | |
534 | return 1; | |
535 | } | |
536 | ||
537 | struct celleb_phb_spec celleb_pciex_spec __initdata = { | |
538 | .setup = celleb_setup_pciex, | |
539 | .ops = &scc_pciex_ops, | |
540 | .iowa_init = &scc_pciex_iowa_init, | |
541 | }; |