blob: a576aeeb22da6cec1a01784328e209a66e96e8df [file] [log] [blame]
Ray Jui1fb37a82015-04-08 11:21:35 -07001/*
2 * Copyright (C) 2014 Hauke Mehrtens <hauke@hauke-m.de>
Florian Fainellibe908d22015-10-16 12:04:04 -07003 * Copyright (C) 2015 Broadcom Corporation
Ray Jui1fb37a82015-04-08 11:21:35 -07004 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation version 2.
8 *
9 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
10 * kind, whether express or implied; without even the implied warranty
11 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15#include <linux/kernel.h>
16#include <linux/pci.h>
17#include <linux/msi.h>
18#include <linux/clk.h>
19#include <linux/module.h>
20#include <linux/mbus.h>
21#include <linux/slab.h>
22#include <linux/delay.h>
23#include <linux/interrupt.h>
24#include <linux/platform_device.h>
25#include <linux/of_address.h>
26#include <linux/of_pci.h>
27#include <linux/of_irq.h>
28#include <linux/of_platform.h>
29#include <linux/phy/phy.h>
30
31#include "pcie-iproc.h"
32
Ray Jui199ff142015-09-15 17:39:18 -070033#define EP_PERST_SOURCE_SELECT_SHIFT 2
34#define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT)
Ray Jui1fb37a82015-04-08 11:21:35 -070035#define EP_MODE_SURVIVE_PERST_SHIFT 1
36#define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT)
37#define RC_PCIE_RST_OUTPUT_SHIFT 0
38#define RC_PCIE_RST_OUTPUT BIT(RC_PCIE_RST_OUTPUT_SHIFT)
Ray Jui943ebae2015-12-04 09:34:59 -080039#define PAXC_RESET_MASK 0x7f
Ray Jui1fb37a82015-04-08 11:21:35 -070040
Ray Jui1fb37a82015-04-08 11:21:35 -070041#define CFG_IND_ADDR_MASK 0x00001ffc
42
Ray Jui1fb37a82015-04-08 11:21:35 -070043#define CFG_ADDR_BUS_NUM_SHIFT 20
44#define CFG_ADDR_BUS_NUM_MASK 0x0ff00000
45#define CFG_ADDR_DEV_NUM_SHIFT 15
46#define CFG_ADDR_DEV_NUM_MASK 0x000f8000
47#define CFG_ADDR_FUNC_NUM_SHIFT 12
48#define CFG_ADDR_FUNC_NUM_MASK 0x00007000
49#define CFG_ADDR_REG_NUM_SHIFT 2
50#define CFG_ADDR_REG_NUM_MASK 0x00000ffc
51#define CFG_ADDR_CFG_TYPE_SHIFT 0
52#define CFG_ADDR_CFG_TYPE_MASK 0x00000003
53
Ray Jui1fb37a82015-04-08 11:21:35 -070054#define SYS_RC_INTX_MASK 0xf
55
Ray Juiaaf22ab2015-09-15 17:39:19 -070056#define PCIE_PHYLINKUP_SHIFT 3
57#define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT)
58#define PCIE_DL_ACTIVE_SHIFT 2
59#define PCIE_DL_ACTIVE BIT(PCIE_DL_ACTIVE_SHIFT)
60
Ray Juie99a1872015-10-16 08:18:24 -050061#define OARR_VALID_SHIFT 0
62#define OARR_VALID BIT(OARR_VALID_SHIFT)
63#define OARR_SIZE_CFG_SHIFT 1
64#define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT)
65
Ray Juie99a1872015-10-16 08:18:24 -050066#define MAX_NUM_OB_WINDOWS 2
Ray Jui943ebae2015-12-04 09:34:59 -080067
68#define IPROC_PCIE_REG_INVALID 0xffff
69
70enum iproc_pcie_reg {
71 IPROC_PCIE_CLK_CTRL = 0,
72 IPROC_PCIE_CFG_IND_ADDR,
73 IPROC_PCIE_CFG_IND_DATA,
74 IPROC_PCIE_CFG_ADDR,
75 IPROC_PCIE_CFG_DATA,
76 IPROC_PCIE_INTX_EN,
77 IPROC_PCIE_OARR_LO,
78 IPROC_PCIE_OARR_HI,
79 IPROC_PCIE_OMAP_LO,
80 IPROC_PCIE_OMAP_HI,
81 IPROC_PCIE_LINK_STATUS,
82};
83
84/* iProc PCIe PAXB registers */
85static const u16 iproc_pcie_reg_paxb[] = {
86 [IPROC_PCIE_CLK_CTRL] = 0x000,
87 [IPROC_PCIE_CFG_IND_ADDR] = 0x120,
88 [IPROC_PCIE_CFG_IND_DATA] = 0x124,
89 [IPROC_PCIE_CFG_ADDR] = 0x1f8,
90 [IPROC_PCIE_CFG_DATA] = 0x1fc,
91 [IPROC_PCIE_INTX_EN] = 0x330,
92 [IPROC_PCIE_OARR_LO] = 0xd20,
93 [IPROC_PCIE_OARR_HI] = 0xd24,
94 [IPROC_PCIE_OMAP_LO] = 0xd40,
95 [IPROC_PCIE_OMAP_HI] = 0xd44,
96 [IPROC_PCIE_LINK_STATUS] = 0xf0c,
97};
98
99/* iProc PCIe PAXC v1 registers */
100static const u16 iproc_pcie_reg_paxc[] = {
101 [IPROC_PCIE_CLK_CTRL] = 0x000,
102 [IPROC_PCIE_CFG_IND_ADDR] = 0x1f0,
103 [IPROC_PCIE_CFG_IND_DATA] = 0x1f4,
104 [IPROC_PCIE_CFG_ADDR] = 0x1f8,
105 [IPROC_PCIE_CFG_DATA] = 0x1fc,
106 [IPROC_PCIE_INTX_EN] = IPROC_PCIE_REG_INVALID,
107 [IPROC_PCIE_OARR_LO] = IPROC_PCIE_REG_INVALID,
108 [IPROC_PCIE_OARR_HI] = IPROC_PCIE_REG_INVALID,
109 [IPROC_PCIE_OMAP_LO] = IPROC_PCIE_REG_INVALID,
110 [IPROC_PCIE_OMAP_HI] = IPROC_PCIE_REG_INVALID,
111 [IPROC_PCIE_LINK_STATUS] = IPROC_PCIE_REG_INVALID,
112};
Ray Juie99a1872015-10-16 08:18:24 -0500113
Ray Jui8d9bfe32015-07-21 18:29:40 -0700114static inline struct iproc_pcie *iproc_data(struct pci_bus *bus)
Ray Jui1fb37a82015-04-08 11:21:35 -0700115{
Ray Jui8d9bfe32015-07-21 18:29:40 -0700116 struct iproc_pcie *pcie;
117#ifdef CONFIG_ARM
118 struct pci_sys_data *sys = bus->sysdata;
119
120 pcie = sys->private_data;
121#else
122 pcie = bus->sysdata;
123#endif
124 return pcie;
Ray Jui1fb37a82015-04-08 11:21:35 -0700125}
126
Ray Jui943ebae2015-12-04 09:34:59 -0800127static inline bool iproc_pcie_reg_is_invalid(u16 reg_offset)
128{
129 return !!(reg_offset == IPROC_PCIE_REG_INVALID);
130}
131
132static inline u16 iproc_pcie_reg_offset(struct iproc_pcie *pcie,
133 enum iproc_pcie_reg reg)
134{
135 return pcie->reg_offsets[reg];
136}
137
138static inline u32 iproc_pcie_read_reg(struct iproc_pcie *pcie,
139 enum iproc_pcie_reg reg)
140{
141 u16 offset = iproc_pcie_reg_offset(pcie, reg);
142
143 if (iproc_pcie_reg_is_invalid(offset))
144 return 0;
145
146 return readl(pcie->base + offset);
147}
148
149static inline void iproc_pcie_write_reg(struct iproc_pcie *pcie,
150 enum iproc_pcie_reg reg, u32 val)
151{
152 u16 offset = iproc_pcie_reg_offset(pcie, reg);
153
154 if (iproc_pcie_reg_is_invalid(offset))
155 return;
156
157 writel(val, pcie->base + offset);
158}
159
160static inline void iproc_pcie_ob_write(struct iproc_pcie *pcie,
161 enum iproc_pcie_reg reg,
162 unsigned window, u32 val)
163{
164 u16 offset = iproc_pcie_reg_offset(pcie, reg);
165
166 if (iproc_pcie_reg_is_invalid(offset))
167 return;
168
169 writel(val, pcie->base + offset + (window * 8));
170}
171
Ray Jui1fb37a82015-04-08 11:21:35 -0700172/**
173 * Note access to the configuration registers are protected at the higher layer
174 * by 'pci_lock' in drivers/pci/access.c
175 */
176static void __iomem *iproc_pcie_map_cfg_bus(struct pci_bus *bus,
177 unsigned int devfn,
178 int where)
179{
Ray Jui8d9bfe32015-07-21 18:29:40 -0700180 struct iproc_pcie *pcie = iproc_data(bus);
Ray Jui1fb37a82015-04-08 11:21:35 -0700181 unsigned slot = PCI_SLOT(devfn);
182 unsigned fn = PCI_FUNC(devfn);
183 unsigned busno = bus->number;
184 u32 val;
Ray Jui943ebae2015-12-04 09:34:59 -0800185 u16 offset;
186
Ray Jui1fb37a82015-04-08 11:21:35 -0700187 /* root complex access */
188 if (busno == 0) {
Ray Jui46560382016-01-27 16:52:24 -0600189 if (slot > 0 || fn > 0)
190 return NULL;
191
Ray Jui943ebae2015-12-04 09:34:59 -0800192 iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR,
193 where & CFG_IND_ADDR_MASK);
194 offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA);
195 if (iproc_pcie_reg_is_invalid(offset))
Ray Jui1fb37a82015-04-08 11:21:35 -0700196 return NULL;
Ray Jui943ebae2015-12-04 09:34:59 -0800197 else
198 return (pcie->base + offset);
Ray Jui1fb37a82015-04-08 11:21:35 -0700199 }
200
Ray Jui46560382016-01-27 16:52:24 -0600201 /*
202 * PAXC is connected to an internally emulated EP within the SoC. It
203 * allows only one device.
204 */
205 if (pcie->type == IPROC_PCIE_PAXC)
206 if (slot > 0)
207 return NULL;
208
Ray Jui1fb37a82015-04-08 11:21:35 -0700209 /* EP device access */
210 val = (busno << CFG_ADDR_BUS_NUM_SHIFT) |
211 (slot << CFG_ADDR_DEV_NUM_SHIFT) |
212 (fn << CFG_ADDR_FUNC_NUM_SHIFT) |
213 (where & CFG_ADDR_REG_NUM_MASK) |
214 (1 & CFG_ADDR_CFG_TYPE_MASK);
Ray Jui943ebae2015-12-04 09:34:59 -0800215 iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val);
216 offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA);
217 if (iproc_pcie_reg_is_invalid(offset))
218 return NULL;
219 else
220 return (pcie->base + offset);
Ray Jui1fb37a82015-04-08 11:21:35 -0700221}
222
223static struct pci_ops iproc_pcie_ops = {
224 .map_bus = iproc_pcie_map_cfg_bus,
225 .read = pci_generic_config_read32,
226 .write = pci_generic_config_write32,
227};
228
229static void iproc_pcie_reset(struct iproc_pcie *pcie)
230{
231 u32 val;
232
Ray Jui943ebae2015-12-04 09:34:59 -0800233 if (pcie->type == IPROC_PCIE_PAXC) {
234 val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL);
235 val &= ~PAXC_RESET_MASK;
236 iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
237 udelay(100);
238 val |= PAXC_RESET_MASK;
239 iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
240 udelay(100);
241 return;
242 }
243
Ray Jui1fb37a82015-04-08 11:21:35 -0700244 /*
Ray Jui199ff142015-09-15 17:39:18 -0700245 * Select perst_b signal as reset source. Put the device into reset,
246 * and then bring it out of reset
Ray Jui1fb37a82015-04-08 11:21:35 -0700247 */
Ray Jui943ebae2015-12-04 09:34:59 -0800248 val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL);
Ray Jui199ff142015-09-15 17:39:18 -0700249 val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST &
250 ~RC_PCIE_RST_OUTPUT;
Ray Jui943ebae2015-12-04 09:34:59 -0800251 iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
Ray Jui1fb37a82015-04-08 11:21:35 -0700252 udelay(250);
Ray Jui199ff142015-09-15 17:39:18 -0700253
254 val |= RC_PCIE_RST_OUTPUT;
Ray Jui943ebae2015-12-04 09:34:59 -0800255 iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val);
Ray Jui199ff142015-09-15 17:39:18 -0700256 msleep(100);
Ray Jui1fb37a82015-04-08 11:21:35 -0700257}
258
259static int iproc_pcie_check_link(struct iproc_pcie *pcie, struct pci_bus *bus)
260{
261 u8 hdr_type;
Ray Juiaaf22ab2015-09-15 17:39:19 -0700262 u32 link_ctrl, class, val;
Ray Jui1fb37a82015-04-08 11:21:35 -0700263 u16 pos, link_status;
Ray Juiaaf22ab2015-09-15 17:39:19 -0700264 bool link_is_active = false;
265
Ray Jui943ebae2015-12-04 09:34:59 -0800266 /*
267 * PAXC connects to emulated endpoint devices directly and does not
268 * have a Serdes. Therefore skip the link detection logic here.
269 */
270 if (pcie->type == IPROC_PCIE_PAXC)
271 return 0;
272
273 val = iproc_pcie_read_reg(pcie, IPROC_PCIE_LINK_STATUS);
Ray Juiaaf22ab2015-09-15 17:39:19 -0700274 if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) {
275 dev_err(pcie->dev, "PHY or data link is INACTIVE!\n");
276 return -ENODEV;
277 }
Ray Jui1fb37a82015-04-08 11:21:35 -0700278
279 /* make sure we are not in EP mode */
280 pci_bus_read_config_byte(bus, 0, PCI_HEADER_TYPE, &hdr_type);
281 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE) {
282 dev_err(pcie->dev, "in EP mode, hdr=%#02x\n", hdr_type);
283 return -EFAULT;
284 }
285
286 /* force class to PCI_CLASS_BRIDGE_PCI (0x0604) */
Ray Juiaaf22ab2015-09-15 17:39:19 -0700287#define PCI_BRIDGE_CTRL_REG_OFFSET 0x43c
288#define PCI_CLASS_BRIDGE_MASK 0xffff00
289#define PCI_CLASS_BRIDGE_SHIFT 8
290 pci_bus_read_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, &class);
291 class &= ~PCI_CLASS_BRIDGE_MASK;
292 class |= (PCI_CLASS_BRIDGE_PCI << PCI_CLASS_BRIDGE_SHIFT);
293 pci_bus_write_config_dword(bus, 0, PCI_BRIDGE_CTRL_REG_OFFSET, class);
Ray Jui1fb37a82015-04-08 11:21:35 -0700294
295 /* check link status to see if link is active */
296 pos = pci_bus_find_capability(bus, 0, PCI_CAP_ID_EXP);
297 pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA, &link_status);
298 if (link_status & PCI_EXP_LNKSTA_NLW)
Ray Juiaaf22ab2015-09-15 17:39:19 -0700299 link_is_active = true;
Ray Jui1fb37a82015-04-08 11:21:35 -0700300
301 if (!link_is_active) {
302 /* try GEN 1 link speed */
303#define PCI_LINK_STATUS_CTRL_2_OFFSET 0x0dc
304#define PCI_TARGET_LINK_SPEED_MASK 0xf
305#define PCI_TARGET_LINK_SPEED_GEN2 0x2
306#define PCI_TARGET_LINK_SPEED_GEN1 0x1
307 pci_bus_read_config_dword(bus, 0,
308 PCI_LINK_STATUS_CTRL_2_OFFSET,
309 &link_ctrl);
310 if ((link_ctrl & PCI_TARGET_LINK_SPEED_MASK) ==
311 PCI_TARGET_LINK_SPEED_GEN2) {
312 link_ctrl &= ~PCI_TARGET_LINK_SPEED_MASK;
313 link_ctrl |= PCI_TARGET_LINK_SPEED_GEN1;
314 pci_bus_write_config_dword(bus, 0,
315 PCI_LINK_STATUS_CTRL_2_OFFSET,
316 link_ctrl);
317 msleep(100);
318
319 pos = pci_bus_find_capability(bus, 0, PCI_CAP_ID_EXP);
320 pci_bus_read_config_word(bus, 0, pos + PCI_EXP_LNKSTA,
321 &link_status);
322 if (link_status & PCI_EXP_LNKSTA_NLW)
Ray Juiaaf22ab2015-09-15 17:39:19 -0700323 link_is_active = true;
Ray Jui1fb37a82015-04-08 11:21:35 -0700324 }
325 }
326
327 dev_info(pcie->dev, "link: %s\n", link_is_active ? "UP" : "DOWN");
328
329 return link_is_active ? 0 : -ENODEV;
330}
331
332static void iproc_pcie_enable(struct iproc_pcie *pcie)
333{
Ray Jui943ebae2015-12-04 09:34:59 -0800334 iproc_pcie_write_reg(pcie, IPROC_PCIE_INTX_EN, SYS_RC_INTX_MASK);
Ray Jui1fb37a82015-04-08 11:21:35 -0700335}
336
Ray Juie99a1872015-10-16 08:18:24 -0500337/**
338 * Some iProc SoCs require the SW to configure the outbound address mapping
339 *
340 * Outbound address translation:
341 *
342 * iproc_pcie_address = axi_address - axi_offset
343 * OARR = iproc_pcie_address
344 * OMAP = pci_addr
345 *
346 * axi_addr -> iproc_pcie_address -> OARR -> OMAP -> pci_address
347 */
348static int iproc_pcie_setup_ob(struct iproc_pcie *pcie, u64 axi_addr,
349 u64 pci_addr, resource_size_t size)
350{
351 struct iproc_pcie_ob *ob = &pcie->ob;
352 unsigned i;
353 u64 max_size = (u64)ob->window_size * MAX_NUM_OB_WINDOWS;
354 u64 remainder;
355
356 if (size > max_size) {
357 dev_err(pcie->dev,
Dmitry V. Krivenok57303e92015-11-30 23:45:49 +0300358 "res size %pap exceeds max supported size 0x%llx\n",
Ray Juie99a1872015-10-16 08:18:24 -0500359 &size, max_size);
360 return -EINVAL;
361 }
362
363 div64_u64_rem(size, ob->window_size, &remainder);
364 if (remainder) {
365 dev_err(pcie->dev,
366 "res size %pap needs to be multiple of window size %pap\n",
367 &size, &ob->window_size);
368 return -EINVAL;
369 }
370
371 if (axi_addr < ob->axi_offset) {
372 dev_err(pcie->dev,
373 "axi address %pap less than offset %pap\n",
374 &axi_addr, &ob->axi_offset);
375 return -EINVAL;
376 }
377
378 /*
379 * Translate the AXI address to the internal address used by the iProc
380 * PCIe core before programming the OARR
381 */
382 axi_addr -= ob->axi_offset;
383
384 for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) {
Ray Jui943ebae2015-12-04 09:34:59 -0800385 iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_LO, i,
386 lower_32_bits(axi_addr) | OARR_VALID |
387 (ob->set_oarr_size ? 1 : 0));
388 iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_HI, i,
389 upper_32_bits(axi_addr));
390 iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_LO, i,
391 lower_32_bits(pci_addr));
392 iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_HI, i,
393 upper_32_bits(pci_addr));
Ray Juie99a1872015-10-16 08:18:24 -0500394
395 size -= ob->window_size;
396 if (size == 0)
397 break;
398
399 axi_addr += ob->window_size;
400 pci_addr += ob->window_size;
401 }
402
403 return 0;
404}
405
406static int iproc_pcie_map_ranges(struct iproc_pcie *pcie,
407 struct list_head *resources)
408{
409 struct resource_entry *window;
410 int ret;
411
412 resource_list_for_each_entry(window, resources) {
413 struct resource *res = window->res;
414 u64 res_type = resource_type(res);
415
416 switch (res_type) {
417 case IORESOURCE_IO:
418 case IORESOURCE_BUS:
419 break;
420 case IORESOURCE_MEM:
421 ret = iproc_pcie_setup_ob(pcie, res->start,
422 res->start - window->offset,
423 resource_size(res));
424 if (ret)
425 return ret;
426 break;
427 default:
428 dev_err(pcie->dev, "invalid resource %pR\n", res);
429 return -EINVAL;
430 }
431 }
432
433 return 0;
434}
435
Ray Jui3bc2b232016-01-06 18:04:35 -0600436static int iproc_pcie_msi_enable(struct iproc_pcie *pcie)
437{
438 struct device_node *msi_node;
439
440 msi_node = of_parse_phandle(pcie->dev->of_node, "msi-parent", 0);
441 if (!msi_node)
442 return -ENODEV;
443
444 /*
445 * If another MSI controller is being used, the call below should fail
446 * but that is okay
447 */
448 return iproc_msi_init(pcie, msi_node);
449}
450
451static void iproc_pcie_msi_disable(struct iproc_pcie *pcie)
452{
453 iproc_msi_exit(pcie);
454}
455
Hauke Mehrtens18c43422015-05-24 22:37:02 +0200456int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
Ray Jui1fb37a82015-04-08 11:21:35 -0700457{
458 int ret;
Ray Jui8d9bfe32015-07-21 18:29:40 -0700459 void *sysdata;
Ray Jui1fb37a82015-04-08 11:21:35 -0700460 struct pci_bus *bus;
461
462 if (!pcie || !pcie->dev || !pcie->base)
463 return -EINVAL;
464
Markus Elfring93972d12015-06-28 16:42:04 +0200465 ret = phy_init(pcie->phy);
466 if (ret) {
467 dev_err(pcie->dev, "unable to initialize PCIe PHY\n");
468 return ret;
469 }
Ray Jui1fb37a82015-04-08 11:21:35 -0700470
Markus Elfring93972d12015-06-28 16:42:04 +0200471 ret = phy_power_on(pcie->phy);
472 if (ret) {
473 dev_err(pcie->dev, "unable to power on PCIe PHY\n");
474 goto err_exit_phy;
Ray Jui1fb37a82015-04-08 11:21:35 -0700475 }
476
Ray Jui943ebae2015-12-04 09:34:59 -0800477 switch (pcie->type) {
478 case IPROC_PCIE_PAXB:
479 pcie->reg_offsets = iproc_pcie_reg_paxb;
480 break;
481 case IPROC_PCIE_PAXC:
482 pcie->reg_offsets = iproc_pcie_reg_paxc;
483 break;
484 default:
485 dev_err(pcie->dev, "incompatible iProc PCIe interface\n");
486 ret = -EINVAL;
487 goto err_power_off_phy;
488 }
489
Ray Jui1fb37a82015-04-08 11:21:35 -0700490 iproc_pcie_reset(pcie);
491
Ray Juie99a1872015-10-16 08:18:24 -0500492 if (pcie->need_ob_cfg) {
493 ret = iproc_pcie_map_ranges(pcie, res);
494 if (ret) {
495 dev_err(pcie->dev, "map failed\n");
496 goto err_power_off_phy;
497 }
498 }
499
Ray Jui8d9bfe32015-07-21 18:29:40 -0700500#ifdef CONFIG_ARM
Ray Jui1fb37a82015-04-08 11:21:35 -0700501 pcie->sysdata.private_data = pcie;
Ray Jui8d9bfe32015-07-21 18:29:40 -0700502 sysdata = &pcie->sysdata;
503#else
504 sysdata = pcie;
505#endif
Ray Jui1fb37a82015-04-08 11:21:35 -0700506
Ray Jui8d9bfe32015-07-21 18:29:40 -0700507 bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, sysdata, res);
Ray Jui1fb37a82015-04-08 11:21:35 -0700508 if (!bus) {
509 dev_err(pcie->dev, "unable to create PCI root bus\n");
510 ret = -ENOMEM;
511 goto err_power_off_phy;
512 }
513 pcie->root_bus = bus;
514
515 ret = iproc_pcie_check_link(pcie, bus);
516 if (ret) {
517 dev_err(pcie->dev, "no PCIe EP device detected\n");
518 goto err_rm_root_bus;
519 }
520
521 iproc_pcie_enable(pcie);
522
Ray Jui3bc2b232016-01-06 18:04:35 -0600523 if (IS_ENABLED(CONFIG_PCI_MSI))
524 if (iproc_pcie_msi_enable(pcie))
525 dev_info(pcie->dev, "not using iProc MSI\n");
526
Ray Jui1fb37a82015-04-08 11:21:35 -0700527 pci_scan_child_bus(bus);
528 pci_assign_unassigned_bus_resources(bus);
Hauke Mehrtensc1e02ce2015-05-12 23:23:00 +0200529 pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
Ray Jui1fb37a82015-04-08 11:21:35 -0700530 pci_bus_add_devices(bus);
531
532 return 0;
533
534err_rm_root_bus:
535 pci_stop_root_bus(bus);
536 pci_remove_root_bus(bus);
537
538err_power_off_phy:
Markus Elfring93972d12015-06-28 16:42:04 +0200539 phy_power_off(pcie->phy);
Ray Jui1fb37a82015-04-08 11:21:35 -0700540err_exit_phy:
Markus Elfring93972d12015-06-28 16:42:04 +0200541 phy_exit(pcie->phy);
Ray Jui1fb37a82015-04-08 11:21:35 -0700542 return ret;
543}
544EXPORT_SYMBOL(iproc_pcie_setup);
545
546int iproc_pcie_remove(struct iproc_pcie *pcie)
547{
548 pci_stop_root_bus(pcie->root_bus);
549 pci_remove_root_bus(pcie->root_bus);
550
Ray Jui3bc2b232016-01-06 18:04:35 -0600551 iproc_pcie_msi_disable(pcie);
552
Markus Elfring93972d12015-06-28 16:42:04 +0200553 phy_power_off(pcie->phy);
554 phy_exit(pcie->phy);
Ray Jui1fb37a82015-04-08 11:21:35 -0700555
556 return 0;
557}
558EXPORT_SYMBOL(iproc_pcie_remove);
559
560MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
561MODULE_DESCRIPTION("Broadcom iPROC PCIe common driver");
562MODULE_LICENSE("GPL v2");