Commit | Line | Data |
---|---|---|
038ee083 | 1 | /* |
9dd0b194 | 2 | * arch/arm/mach-orion5x/pci.c |
038ee083 | 3 | * |
159ffb3a | 4 | * PCI and PCIe functions for Marvell Orion System On Chip |
038ee083 TP |
5 | * |
6 | * Maintainer: Tzachi Perelstein <tzachi@marvell.com> | |
7 | * | |
159ffb3a LB |
8 | * This file is licensed under the terms of the GNU General Public |
9 | * License version 2. This program is licensed "as is" without any | |
038ee083 TP |
10 | * warranty of any kind, whether express or implied. |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/pci.h> | |
1f2223b1 | 15 | #include <linux/mbus.h> |
ff89c462 | 16 | #include <asm/irq.h> |
038ee083 | 17 | #include <asm/mach/pci.h> |
6f088f1d | 18 | #include <plat/pcie.h> |
038ee083 TP |
19 | #include "common.h" |
20 | ||
21 | /***************************************************************************** | |
159ffb3a | 22 | * Orion has one PCIe controller and one PCI controller. |
038ee083 | 23 | * |
159ffb3a LB |
24 | * Note1: The local PCIe bus number is '0'. The local PCI bus number |
25 | * follows the scanned PCIe bridged busses, if any. | |
038ee083 | 26 | * |
159ffb3a | 27 | * Note2: It is possible for PCI/PCIe agents to access many subsystem's |
038ee083 TP |
28 | * space, by configuring BARs and Address Decode Windows, e.g. flashes on |
29 | * device bus, Orion registers, etc. However this code only enable the | |
30 | * access to DDR banks. | |
31 | ****************************************************************************/ | |
32 | ||
33 | ||
34 | /***************************************************************************** | |
159ffb3a | 35 | * PCIe controller |
038ee083 | 36 | ****************************************************************************/ |
9dd0b194 | 37 | #define PCIE_BASE ((void __iomem *)ORION5X_PCIE_VIRT_BASE) |
038ee083 | 38 | |
9dd0b194 | 39 | void __init orion5x_pcie_id(u32 *dev, u32 *rev) |
038ee083 | 40 | { |
abc0197d LB |
41 | *dev = orion_pcie_dev_id(PCIE_BASE); |
42 | *rev = orion_pcie_rev(PCIE_BASE); | |
038ee083 TP |
43 | } |
44 | ||
abc0197d | 45 | static int pcie_valid_config(int bus, int dev) |
038ee083 TP |
46 | { |
47 | /* | |
48 | * Don't go out when trying to access -- | |
d50c60a8 | 49 | * 1. nonexisting device on local bus |
038ee083 | 50 | * 2. where there's no device connected (no link) |
038ee083 | 51 | */ |
d50c60a8 LB |
52 | if (bus == 0 && dev == 0) |
53 | return 1; | |
038ee083 | 54 | |
abc0197d | 55 | if (!orion_pcie_link_up(PCIE_BASE)) |
038ee083 TP |
56 | return 0; |
57 | ||
d50c60a8 LB |
58 | if (bus == 0 && dev != 1) |
59 | return 0; | |
60 | ||
038ee083 TP |
61 | return 1; |
62 | } | |
63 | ||
abc0197d LB |
64 | |
65 | /* | |
159ffb3a | 66 | * PCIe config cycles are done by programming the PCIE_CONF_ADDR register |
abc0197d LB |
67 | * and then reading the PCIE_CONF_DATA register. Need to make sure these |
68 | * transactions are atomic. | |
69 | */ | |
9dd0b194 | 70 | static DEFINE_SPINLOCK(orion5x_pcie_lock); |
abc0197d LB |
71 | |
72 | static int pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where, | |
73 | int size, u32 *val) | |
038ee083 TP |
74 | { |
75 | unsigned long flags; | |
abc0197d | 76 | int ret; |
038ee083 | 77 | |
abc0197d | 78 | if (pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) { |
038ee083 TP |
79 | *val = 0xffffffff; |
80 | return PCIBIOS_DEVICE_NOT_FOUND; | |
81 | } | |
82 | ||
9dd0b194 | 83 | spin_lock_irqsave(&orion5x_pcie_lock, flags); |
abc0197d | 84 | ret = orion_pcie_rd_conf(PCIE_BASE, bus, devfn, where, size, val); |
9dd0b194 | 85 | spin_unlock_irqrestore(&orion5x_pcie_lock, flags); |
038ee083 | 86 | |
abc0197d LB |
87 | return ret; |
88 | } | |
038ee083 | 89 | |
abc0197d LB |
90 | static int pcie_rd_conf_wa(struct pci_bus *bus, u32 devfn, |
91 | int where, int size, u32 *val) | |
92 | { | |
93 | int ret; | |
038ee083 | 94 | |
abc0197d LB |
95 | if (pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) { |
96 | *val = 0xffffffff; | |
97 | return PCIBIOS_DEVICE_NOT_FOUND; | |
98 | } | |
038ee083 | 99 | |
abc0197d LB |
100 | /* |
101 | * We only support access to the non-extended configuration | |
102 | * space when using the WA access method (or we would have to | |
103 | * sacrifice 256M of CPU virtual address space.) | |
104 | */ | |
105 | if (where >= 0x100) { | |
106 | *val = 0xffffffff; | |
107 | return PCIBIOS_DEVICE_NOT_FOUND; | |
108 | } | |
038ee083 | 109 | |
9dd0b194 | 110 | ret = orion_pcie_rd_conf_wa((void __iomem *)ORION5X_PCIE_WA_VIRT_BASE, |
abc0197d | 111 | bus, devfn, where, size, val); |
038ee083 | 112 | |
abc0197d LB |
113 | return ret; |
114 | } | |
038ee083 | 115 | |
abc0197d LB |
116 | static int pcie_wr_conf(struct pci_bus *bus, u32 devfn, |
117 | int where, int size, u32 val) | |
038ee083 TP |
118 | { |
119 | unsigned long flags; | |
120 | int ret; | |
121 | ||
abc0197d | 122 | if (pcie_valid_config(bus->number, PCI_SLOT(devfn)) == 0) |
038ee083 TP |
123 | return PCIBIOS_DEVICE_NOT_FOUND; |
124 | ||
9dd0b194 | 125 | spin_lock_irqsave(&orion5x_pcie_lock, flags); |
abc0197d | 126 | ret = orion_pcie_wr_conf(PCIE_BASE, bus, devfn, where, size, val); |
9dd0b194 | 127 | spin_unlock_irqrestore(&orion5x_pcie_lock, flags); |
038ee083 TP |
128 | |
129 | return ret; | |
130 | } | |
131 | ||
159ffb3a | 132 | static struct pci_ops pcie_ops = { |
abc0197d LB |
133 | .read = pcie_rd_conf, |
134 | .write = pcie_wr_conf, | |
038ee083 TP |
135 | }; |
136 | ||
137 | ||
a9984270 | 138 | static int __init pcie_setup(struct pci_sys_data *sys) |
038ee083 TP |
139 | { |
140 | struct resource *res; | |
abc0197d | 141 | int dev; |
038ee083 | 142 | |
1f2223b1 | 143 | /* |
abc0197d | 144 | * Generic PCIe unit setup. |
038ee083 | 145 | */ |
9dd0b194 | 146 | orion_pcie_setup(PCIE_BASE, &orion5x_mbus_dram_info); |
038ee083 TP |
147 | |
148 | /* | |
abc0197d LB |
149 | * Check whether to apply Orion-1/Orion-NAS PCIe config |
150 | * read transaction workaround. | |
038ee083 | 151 | */ |
abc0197d LB |
152 | dev = orion_pcie_dev_id(PCIE_BASE); |
153 | if (dev == MV88F5181_DEV_ID || dev == MV88F5182_DEV_ID) { | |
154 | printk(KERN_NOTICE "Applying Orion-1/Orion-NAS PCIe config " | |
155 | "read transaction workaround\n"); | |
386a048a LB |
156 | orion5x_setup_pcie_wa_win(ORION5X_PCIE_WA_PHYS_BASE, |
157 | ORION5X_PCIE_WA_SIZE); | |
abc0197d LB |
158 | pcie_ops.read = pcie_rd_conf_wa; |
159 | } | |
038ee083 TP |
160 | |
161 | /* | |
abc0197d | 162 | * Request resources. |
038ee083 TP |
163 | */ |
164 | res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); | |
165 | if (!res) | |
abc0197d | 166 | panic("pcie_setup unable to alloc resources"); |
038ee083 TP |
167 | |
168 | /* | |
169 | * IORESOURCE_IO | |
170 | */ | |
159ffb3a | 171 | res[0].name = "PCIe I/O Space"; |
038ee083 | 172 | res[0].flags = IORESOURCE_IO; |
9dd0b194 LB |
173 | res[0].start = ORION5X_PCIE_IO_BUS_BASE; |
174 | res[0].end = res[0].start + ORION5X_PCIE_IO_SIZE - 1; | |
038ee083 | 175 | if (request_resource(&ioport_resource, &res[0])) |
159ffb3a | 176 | panic("Request PCIe IO resource failed\n"); |
038ee083 TP |
177 | sys->resource[0] = &res[0]; |
178 | ||
179 | /* | |
180 | * IORESOURCE_MEM | |
181 | */ | |
159ffb3a | 182 | res[1].name = "PCIe Memory Space"; |
038ee083 | 183 | res[1].flags = IORESOURCE_MEM; |
9dd0b194 LB |
184 | res[1].start = ORION5X_PCIE_MEM_PHYS_BASE; |
185 | res[1].end = res[1].start + ORION5X_PCIE_MEM_SIZE - 1; | |
038ee083 | 186 | if (request_resource(&iomem_resource, &res[1])) |
159ffb3a | 187 | panic("Request PCIe Memory resource failed\n"); |
038ee083 TP |
188 | sys->resource[1] = &res[1]; |
189 | ||
190 | sys->resource[2] = NULL; | |
191 | sys->io_offset = 0; | |
192 | ||
193 | return 1; | |
194 | } | |
195 | ||
196 | /***************************************************************************** | |
197 | * PCI controller | |
198 | ****************************************************************************/ | |
fdd8b079 | 199 | #define ORION5X_PCI_REG(x) (ORION5X_PCI_VIRT_BASE | (x)) |
9dd0b194 LB |
200 | #define PCI_MODE ORION5X_PCI_REG(0xd00) |
201 | #define PCI_CMD ORION5X_PCI_REG(0xc00) | |
202 | #define PCI_P2P_CONF ORION5X_PCI_REG(0x1d14) | |
203 | #define PCI_CONF_ADDR ORION5X_PCI_REG(0xc78) | |
204 | #define PCI_CONF_DATA ORION5X_PCI_REG(0xc7c) | |
038ee083 TP |
205 | |
206 | /* | |
207 | * PCI_MODE bits | |
208 | */ | |
209 | #define PCI_MODE_64BIT (1 << 2) | |
210 | #define PCI_MODE_PCIX ((1 << 4) | (1 << 5)) | |
211 | ||
212 | /* | |
213 | * PCI_CMD bits | |
214 | */ | |
215 | #define PCI_CMD_HOST_REORDER (1 << 29) | |
216 | ||
217 | /* | |
218 | * PCI_P2P_CONF bits | |
219 | */ | |
220 | #define PCI_P2P_BUS_OFFS 16 | |
221 | #define PCI_P2P_BUS_MASK (0xff << PCI_P2P_BUS_OFFS) | |
222 | #define PCI_P2P_DEV_OFFS 24 | |
223 | #define PCI_P2P_DEV_MASK (0x1f << PCI_P2P_DEV_OFFS) | |
224 | ||
225 | /* | |
226 | * PCI_CONF_ADDR bits | |
227 | */ | |
228 | #define PCI_CONF_REG(reg) ((reg) & 0xfc) | |
229 | #define PCI_CONF_FUNC(func) (((func) & 0x3) << 8) | |
230 | #define PCI_CONF_DEV(dev) (((dev) & 0x1f) << 11) | |
231 | #define PCI_CONF_BUS(bus) (((bus) & 0xff) << 16) | |
232 | #define PCI_CONF_ADDR_EN (1 << 31) | |
233 | ||
234 | /* | |
235 | * Internal configuration space | |
236 | */ | |
237 | #define PCI_CONF_FUNC_STAT_CMD 0 | |
238 | #define PCI_CONF_REG_STAT_CMD 4 | |
239 | #define PCIX_STAT 0x64 | |
240 | #define PCIX_STAT_BUS_OFFS 8 | |
241 | #define PCIX_STAT_BUS_MASK (0xff << PCIX_STAT_BUS_OFFS) | |
242 | ||
1f2223b1 LB |
243 | /* |
244 | * PCI Address Decode Windows registers | |
245 | */ | |
9dd0b194 | 246 | #define PCI_BAR_SIZE_DDR_CS(n) (((n) == 0) ? ORION5X_PCI_REG(0xc08) : \ |
e7068ad3 LB |
247 | ((n) == 1) ? ORION5X_PCI_REG(0xd08) : \ |
248 | ((n) == 2) ? ORION5X_PCI_REG(0xc0c) : \ | |
249 | ((n) == 3) ? ORION5X_PCI_REG(0xd0c) : 0) | |
250 | #define PCI_BAR_REMAP_DDR_CS(n) (((n) == 0) ? ORION5X_PCI_REG(0xc48) : \ | |
251 | ((n) == 1) ? ORION5X_PCI_REG(0xd48) : \ | |
252 | ((n) == 2) ? ORION5X_PCI_REG(0xc4c) : \ | |
253 | ((n) == 3) ? ORION5X_PCI_REG(0xd4c) : 0) | |
9dd0b194 LB |
254 | #define PCI_BAR_ENABLE ORION5X_PCI_REG(0xc3c) |
255 | #define PCI_ADDR_DECODE_CTRL ORION5X_PCI_REG(0xd3c) | |
1f2223b1 LB |
256 | |
257 | /* | |
258 | * PCI configuration helpers for BAR settings | |
259 | */ | |
260 | #define PCI_CONF_FUNC_BAR_CS(n) ((n) >> 1) | |
261 | #define PCI_CONF_REG_BAR_LO_CS(n) (((n) & 1) ? 0x18 : 0x10) | |
262 | #define PCI_CONF_REG_BAR_HI_CS(n) (((n) & 1) ? 0x1c : 0x14) | |
263 | ||
038ee083 TP |
264 | /* |
265 | * PCI config cycles are done by programming the PCI_CONF_ADDR register | |
266 | * and then reading the PCI_CONF_DATA register. Need to make sure these | |
267 | * transactions are atomic. | |
268 | */ | |
9dd0b194 | 269 | static DEFINE_SPINLOCK(orion5x_pci_lock); |
038ee083 | 270 | |
da01bba3 LB |
271 | static int orion5x_pci_cardbus_mode; |
272 | ||
92b913b0 | 273 | static int orion5x_pci_local_bus_nr(void) |
038ee083 | 274 | { |
79e90dd5 | 275 | u32 conf = readl(PCI_P2P_CONF); |
038ee083 TP |
276 | return((conf & PCI_P2P_BUS_MASK) >> PCI_P2P_BUS_OFFS); |
277 | } | |
278 | ||
9dd0b194 | 279 | static int orion5x_pci_hw_rd_conf(int bus, int dev, u32 func, |
038ee083 TP |
280 | u32 where, u32 size, u32 *val) |
281 | { | |
282 | unsigned long flags; | |
9dd0b194 | 283 | spin_lock_irqsave(&orion5x_pci_lock, flags); |
038ee083 | 284 | |
79e90dd5 LB |
285 | writel(PCI_CONF_BUS(bus) | |
286 | PCI_CONF_DEV(dev) | PCI_CONF_REG(where) | | |
287 | PCI_CONF_FUNC(func) | PCI_CONF_ADDR_EN, PCI_CONF_ADDR); | |
038ee083 | 288 | |
79e90dd5 | 289 | *val = readl(PCI_CONF_DATA); |
038ee083 TP |
290 | |
291 | if (size == 1) | |
292 | *val = (*val >> (8*(where & 0x3))) & 0xff; | |
293 | else if (size == 2) | |
294 | *val = (*val >> (8*(where & 0x3))) & 0xffff; | |
295 | ||
9dd0b194 | 296 | spin_unlock_irqrestore(&orion5x_pci_lock, flags); |
038ee083 TP |
297 | |
298 | return PCIBIOS_SUCCESSFUL; | |
299 | } | |
300 | ||
9dd0b194 | 301 | static int orion5x_pci_hw_wr_conf(int bus, int dev, u32 func, |
038ee083 TP |
302 | u32 where, u32 size, u32 val) |
303 | { | |
304 | unsigned long flags; | |
305 | int ret = PCIBIOS_SUCCESSFUL; | |
306 | ||
9dd0b194 | 307 | spin_lock_irqsave(&orion5x_pci_lock, flags); |
038ee083 | 308 | |
79e90dd5 LB |
309 | writel(PCI_CONF_BUS(bus) | |
310 | PCI_CONF_DEV(dev) | PCI_CONF_REG(where) | | |
311 | PCI_CONF_FUNC(func) | PCI_CONF_ADDR_EN, PCI_CONF_ADDR); | |
038ee083 TP |
312 | |
313 | if (size == 4) { | |
314 | __raw_writel(val, PCI_CONF_DATA); | |
315 | } else if (size == 2) { | |
316 | __raw_writew(val, PCI_CONF_DATA + (where & 0x3)); | |
317 | } else if (size == 1) { | |
318 | __raw_writeb(val, PCI_CONF_DATA + (where & 0x3)); | |
319 | } else { | |
320 | ret = PCIBIOS_BAD_REGISTER_NUMBER; | |
321 | } | |
322 | ||
9dd0b194 | 323 | spin_unlock_irqrestore(&orion5x_pci_lock, flags); |
038ee083 TP |
324 | |
325 | return ret; | |
326 | } | |
327 | ||
da01bba3 LB |
328 | static int orion5x_pci_valid_config(int bus, u32 devfn) |
329 | { | |
330 | if (bus == orion5x_pci_local_bus_nr()) { | |
331 | /* | |
332 | * Don't go out for local device | |
333 | */ | |
334 | if (PCI_SLOT(devfn) == 0 && PCI_FUNC(devfn) != 0) | |
335 | return 0; | |
336 | ||
337 | /* | |
338 | * When the PCI signals are directly connected to a | |
339 | * Cardbus slot, ignore all but device IDs 0 and 1. | |
340 | */ | |
341 | if (orion5x_pci_cardbus_mode && PCI_SLOT(devfn) > 1) | |
342 | return 0; | |
343 | } | |
344 | ||
345 | return 1; | |
346 | } | |
347 | ||
9dd0b194 | 348 | static int orion5x_pci_rd_conf(struct pci_bus *bus, u32 devfn, |
038ee083 TP |
349 | int where, int size, u32 *val) |
350 | { | |
da01bba3 | 351 | if (!orion5x_pci_valid_config(bus->number, devfn)) { |
038ee083 TP |
352 | *val = 0xffffffff; |
353 | return PCIBIOS_DEVICE_NOT_FOUND; | |
354 | } | |
355 | ||
9dd0b194 | 356 | return orion5x_pci_hw_rd_conf(bus->number, PCI_SLOT(devfn), |
038ee083 TP |
357 | PCI_FUNC(devfn), where, size, val); |
358 | } | |
359 | ||
9dd0b194 | 360 | static int orion5x_pci_wr_conf(struct pci_bus *bus, u32 devfn, |
038ee083 TP |
361 | int where, int size, u32 val) |
362 | { | |
da01bba3 | 363 | if (!orion5x_pci_valid_config(bus->number, devfn)) |
038ee083 TP |
364 | return PCIBIOS_DEVICE_NOT_FOUND; |
365 | ||
9dd0b194 | 366 | return orion5x_pci_hw_wr_conf(bus->number, PCI_SLOT(devfn), |
038ee083 TP |
367 | PCI_FUNC(devfn), where, size, val); |
368 | } | |
369 | ||
159ffb3a | 370 | static struct pci_ops pci_ops = { |
9dd0b194 LB |
371 | .read = orion5x_pci_rd_conf, |
372 | .write = orion5x_pci_wr_conf, | |
038ee083 TP |
373 | }; |
374 | ||
9dd0b194 | 375 | static void __init orion5x_pci_set_bus_nr(int nr) |
038ee083 | 376 | { |
79e90dd5 | 377 | u32 p2p = readl(PCI_P2P_CONF); |
038ee083 | 378 | |
79e90dd5 | 379 | if (readl(PCI_MODE) & PCI_MODE_PCIX) { |
038ee083 TP |
380 | /* |
381 | * PCI-X mode | |
382 | */ | |
383 | u32 pcix_status, bus, dev; | |
384 | bus = (p2p & PCI_P2P_BUS_MASK) >> PCI_P2P_BUS_OFFS; | |
385 | dev = (p2p & PCI_P2P_DEV_MASK) >> PCI_P2P_DEV_OFFS; | |
9dd0b194 | 386 | orion5x_pci_hw_rd_conf(bus, dev, 0, PCIX_STAT, 4, &pcix_status); |
038ee083 TP |
387 | pcix_status &= ~PCIX_STAT_BUS_MASK; |
388 | pcix_status |= (nr << PCIX_STAT_BUS_OFFS); | |
9dd0b194 | 389 | orion5x_pci_hw_wr_conf(bus, dev, 0, PCIX_STAT, 4, pcix_status); |
038ee083 TP |
390 | } else { |
391 | /* | |
392 | * PCI Conventional mode | |
393 | */ | |
394 | p2p &= ~PCI_P2P_BUS_MASK; | |
395 | p2p |= (nr << PCI_P2P_BUS_OFFS); | |
79e90dd5 | 396 | writel(p2p, PCI_P2P_CONF); |
038ee083 TP |
397 | } |
398 | } | |
399 | ||
9dd0b194 | 400 | static void __init orion5x_pci_master_slave_enable(void) |
038ee083 | 401 | { |
d50c60a8 | 402 | int bus_nr, func, reg; |
abc0197d | 403 | u32 val; |
038ee083 | 404 | |
9dd0b194 | 405 | bus_nr = orion5x_pci_local_bus_nr(); |
038ee083 TP |
406 | func = PCI_CONF_FUNC_STAT_CMD; |
407 | reg = PCI_CONF_REG_STAT_CMD; | |
9dd0b194 | 408 | orion5x_pci_hw_rd_conf(bus_nr, 0, func, reg, 4, &val); |
038ee083 | 409 | val |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); |
9dd0b194 | 410 | orion5x_pci_hw_wr_conf(bus_nr, 0, func, reg, 4, val | 0x7); |
038ee083 TP |
411 | } |
412 | ||
9dd0b194 | 413 | static void __init orion5x_setup_pci_wins(struct mbus_dram_target_info *dram) |
1f2223b1 LB |
414 | { |
415 | u32 win_enable; | |
abc0197d | 416 | int bus; |
1f2223b1 LB |
417 | int i; |
418 | ||
419 | /* | |
420 | * First, disable windows. | |
421 | */ | |
422 | win_enable = 0xffffffff; | |
79e90dd5 | 423 | writel(win_enable, PCI_BAR_ENABLE); |
1f2223b1 LB |
424 | |
425 | /* | |
426 | * Setup windows for DDR banks. | |
427 | */ | |
9dd0b194 | 428 | bus = orion5x_pci_local_bus_nr(); |
1f2223b1 LB |
429 | |
430 | for (i = 0; i < dram->num_cs; i++) { | |
431 | struct mbus_dram_window *cs = dram->cs + i; | |
432 | u32 func = PCI_CONF_FUNC_BAR_CS(cs->cs_index); | |
433 | u32 reg; | |
434 | u32 val; | |
435 | ||
436 | /* | |
437 | * Write DRAM bank base address register. | |
438 | */ | |
439 | reg = PCI_CONF_REG_BAR_LO_CS(cs->cs_index); | |
9dd0b194 | 440 | orion5x_pci_hw_rd_conf(bus, 0, func, reg, 4, &val); |
1f2223b1 | 441 | val = (cs->base & 0xfffff000) | (val & 0xfff); |
9dd0b194 | 442 | orion5x_pci_hw_wr_conf(bus, 0, func, reg, 4, val); |
1f2223b1 LB |
443 | |
444 | /* | |
445 | * Write DRAM bank size register. | |
446 | */ | |
447 | reg = PCI_CONF_REG_BAR_HI_CS(cs->cs_index); | |
9dd0b194 | 448 | orion5x_pci_hw_wr_conf(bus, 0, func, reg, 4, 0); |
79e90dd5 LB |
449 | writel((cs->size - 1) & 0xfffff000, |
450 | PCI_BAR_SIZE_DDR_CS(cs->cs_index)); | |
451 | writel(cs->base & 0xfffff000, | |
452 | PCI_BAR_REMAP_DDR_CS(cs->cs_index)); | |
1f2223b1 LB |
453 | |
454 | /* | |
455 | * Enable decode window for this chip select. | |
456 | */ | |
457 | win_enable &= ~(1 << cs->cs_index); | |
458 | } | |
459 | ||
460 | /* | |
461 | * Re-enable decode windows. | |
462 | */ | |
79e90dd5 | 463 | writel(win_enable, PCI_BAR_ENABLE); |
1f2223b1 LB |
464 | |
465 | /* | |
af901ca1 | 466 | * Disable automatic update of address remapping when writing to BARs. |
1f2223b1 | 467 | */ |
9dd0b194 | 468 | orion5x_setbits(PCI_ADDR_DECODE_CTRL, 1); |
1f2223b1 LB |
469 | } |
470 | ||
a9984270 | 471 | static int __init pci_setup(struct pci_sys_data *sys) |
038ee083 TP |
472 | { |
473 | struct resource *res; | |
474 | ||
1f2223b1 LB |
475 | /* |
476 | * Point PCI unit MBUS decode windows to DRAM space. | |
477 | */ | |
9dd0b194 | 478 | orion5x_setup_pci_wins(&orion5x_mbus_dram_info); |
1f2223b1 | 479 | |
038ee083 TP |
480 | /* |
481 | * Master + Slave enable | |
482 | */ | |
9dd0b194 | 483 | orion5x_pci_master_slave_enable(); |
038ee083 TP |
484 | |
485 | /* | |
486 | * Force ordering | |
487 | */ | |
9dd0b194 | 488 | orion5x_setbits(PCI_CMD, PCI_CMD_HOST_REORDER); |
038ee083 TP |
489 | |
490 | /* | |
491 | * Request resources | |
492 | */ | |
493 | res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL); | |
494 | if (!res) | |
abc0197d | 495 | panic("pci_setup unable to alloc resources"); |
038ee083 TP |
496 | |
497 | /* | |
498 | * IORESOURCE_IO | |
499 | */ | |
500 | res[0].name = "PCI I/O Space"; | |
501 | res[0].flags = IORESOURCE_IO; | |
9dd0b194 LB |
502 | res[0].start = ORION5X_PCI_IO_BUS_BASE; |
503 | res[0].end = res[0].start + ORION5X_PCI_IO_SIZE - 1; | |
038ee083 TP |
504 | if (request_resource(&ioport_resource, &res[0])) |
505 | panic("Request PCI IO resource failed\n"); | |
506 | sys->resource[0] = &res[0]; | |
507 | ||
508 | /* | |
509 | * IORESOURCE_MEM | |
510 | */ | |
511 | res[1].name = "PCI Memory Space"; | |
512 | res[1].flags = IORESOURCE_MEM; | |
9dd0b194 LB |
513 | res[1].start = ORION5X_PCI_MEM_PHYS_BASE; |
514 | res[1].end = res[1].start + ORION5X_PCI_MEM_SIZE - 1; | |
038ee083 TP |
515 | if (request_resource(&iomem_resource, &res[1])) |
516 | panic("Request PCI Memory resource failed\n"); | |
517 | sys->resource[1] = &res[1]; | |
518 | ||
519 | sys->resource[2] = NULL; | |
520 | sys->io_offset = 0; | |
521 | ||
522 | return 1; | |
523 | } | |
524 | ||
525 | ||
526 | /***************************************************************************** | |
159ffb3a | 527 | * General PCIe + PCI |
038ee083 | 528 | ****************************************************************************/ |
d50c60a8 LB |
529 | static void __devinit rc_pci_fixup(struct pci_dev *dev) |
530 | { | |
531 | /* | |
532 | * Prevent enumeration of root complex. | |
533 | */ | |
534 | if (dev->bus->parent == NULL && dev->devfn == 0) { | |
535 | int i; | |
536 | ||
537 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
538 | dev->resource[i].start = 0; | |
539 | dev->resource[i].end = 0; | |
540 | dev->resource[i].flags = 0; | |
541 | } | |
542 | } | |
543 | } | |
544 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_ANY_ID, rc_pci_fixup); | |
545 | ||
7a6bb262 PA |
546 | static int orion5x_pci_disabled __initdata; |
547 | ||
548 | void __init orion5x_pci_disable(void) | |
549 | { | |
550 | orion5x_pci_disabled = 1; | |
551 | } | |
552 | ||
da01bba3 LB |
553 | void __init orion5x_pci_set_cardbus_mode(void) |
554 | { | |
555 | orion5x_pci_cardbus_mode = 1; | |
556 | } | |
557 | ||
9dd0b194 | 558 | int __init orion5x_pci_sys_setup(int nr, struct pci_sys_data *sys) |
038ee083 TP |
559 | { |
560 | int ret = 0; | |
561 | ||
562 | if (nr == 0) { | |
abc0197d LB |
563 | orion_pcie_set_local_bus_nr(PCIE_BASE, sys->busnr); |
564 | ret = pcie_setup(sys); | |
7a6bb262 | 565 | } else if (nr == 1 && !orion5x_pci_disabled) { |
9dd0b194 | 566 | orion5x_pci_set_bus_nr(sys->busnr); |
abc0197d | 567 | ret = pci_setup(sys); |
038ee083 TP |
568 | } |
569 | ||
570 | return ret; | |
571 | } | |
572 | ||
9dd0b194 | 573 | struct pci_bus __init *orion5x_pci_sys_scan_bus(int nr, struct pci_sys_data *sys) |
038ee083 | 574 | { |
038ee083 TP |
575 | struct pci_bus *bus; |
576 | ||
038ee083 | 577 | if (nr == 0) { |
abc0197d | 578 | bus = pci_scan_bus(sys->busnr, &pcie_ops, sys); |
7a6bb262 | 579 | } else if (nr == 1 && !orion5x_pci_disabled) { |
abc0197d | 580 | bus = pci_scan_bus(sys->busnr, &pci_ops, sys); |
038ee083 | 581 | } else { |
038ee083 | 582 | bus = NULL; |
abc0197d | 583 | BUG(); |
038ee083 TP |
584 | } |
585 | ||
586 | return bus; | |
587 | } | |
92b913b0 LB |
588 | |
589 | int __init orion5x_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
590 | { | |
591 | int bus = dev->bus->number; | |
592 | ||
593 | /* | |
594 | * PCIe endpoint? | |
595 | */ | |
7a6bb262 | 596 | if (orion5x_pci_disabled || bus < orion5x_pci_local_bus_nr()) |
92b913b0 LB |
597 | return IRQ_ORION5X_PCIE0_INT; |
598 | ||
599 | return -1; | |
600 | } |