blob: 0856189c065fd57826df7edab2dba3217d5e283c [file] [log] [blame]
Rafał Miłecki8369ae32011-05-09 18:56:46 +02001/*
2 * Broadcom specific AMBA
3 * PCI Host
4 *
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
7
8#include "bcma_private.h"
Andrew Mortonba7328b2011-05-26 16:24:57 -07009#include <linux/slab.h>
Rafał Miłecki8369ae32011-05-09 18:56:46 +020010#include <linux/bcma/bcma.h>
11#include <linux/pci.h>
Paul Gortmaker200351c2011-07-01 16:06:37 -040012#include <linux/module.h>
Rafał Miłecki8369ae32011-05-09 18:56:46 +020013
14static void bcma_host_pci_switch_core(struct bcma_device *core)
15{
Rafał Miłecki8be08a32015-01-25 13:41:19 +010016 int win2 = core->bus->host_is_pcie2 ?
17 BCMA_PCIE2_BAR0_WIN2 : BCMA_PCI_BAR0_WIN2;
18
Rafał Miłecki8369ae32011-05-09 18:56:46 +020019 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
20 core->addr);
Rafał Miłecki8be08a32015-01-25 13:41:19 +010021 pci_write_config_dword(core->bus->host_pci, win2, core->wrap);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020022 core->bus->mapped_core = core;
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +020023 bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020024}
25
Rafał Miłecki439678f2011-12-05 19:13:39 +010026/* Provides access to the requested core. Returns base offset that has to be
27 * used. It makes use of fixed windows when possible. */
28static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core)
Rafał Miłecki8369ae32011-05-09 18:56:46 +020029{
Rafał Miłecki439678f2011-12-05 19:13:39 +010030 switch (core->id.id) {
31 case BCMA_CORE_CHIPCOMMON:
32 return 3 * BCMA_CORE_SIZE;
33 case BCMA_CORE_PCIE:
34 return 2 * BCMA_CORE_SIZE;
35 }
36
Rafał Miłecki8369ae32011-05-09 18:56:46 +020037 if (core->bus->mapped_core != core)
38 bcma_host_pci_switch_core(core);
Rafał Miłecki439678f2011-12-05 19:13:39 +010039 return 0;
40}
41
42static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
43{
44 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020045 return ioread8(core->bus->mmio + offset);
46}
47
48static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
49{
Rafał Miłecki439678f2011-12-05 19:13:39 +010050 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020051 return ioread16(core->bus->mmio + offset);
52}
53
54static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
55{
Rafał Miłecki439678f2011-12-05 19:13:39 +010056 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020057 return ioread32(core->bus->mmio + offset);
58}
59
60static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
61 u8 value)
62{
Rafał Miłecki439678f2011-12-05 19:13:39 +010063 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020064 iowrite8(value, core->bus->mmio + offset);
65}
66
67static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
68 u16 value)
69{
Rafał Miłecki439678f2011-12-05 19:13:39 +010070 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020071 iowrite16(value, core->bus->mmio + offset);
72}
73
74static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
75 u32 value)
76{
Rafał Miłecki439678f2011-12-05 19:13:39 +010077 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020078 iowrite32(value, core->bus->mmio + offset);
79}
80
Rafał Miłecki9d75ef02011-05-20 03:27:06 +020081#ifdef CONFIG_BCMA_BLOCKIO
Hauke Mehrtens94f34572012-08-05 16:54:41 +020082static void bcma_host_pci_block_read(struct bcma_device *core, void *buffer,
83 size_t count, u16 offset, u8 reg_width)
Rafał Miłecki9d75ef02011-05-20 03:27:06 +020084{
85 void __iomem *addr = core->bus->mmio + offset;
86 if (core->bus->mapped_core != core)
87 bcma_host_pci_switch_core(core);
88 switch (reg_width) {
89 case sizeof(u8):
90 ioread8_rep(addr, buffer, count);
91 break;
92 case sizeof(u16):
93 WARN_ON(count & 1);
94 ioread16_rep(addr, buffer, count >> 1);
95 break;
96 case sizeof(u32):
97 WARN_ON(count & 3);
98 ioread32_rep(addr, buffer, count >> 2);
99 break;
100 default:
101 WARN_ON(1);
102 }
103}
104
Hauke Mehrtens94f34572012-08-05 16:54:41 +0200105static void bcma_host_pci_block_write(struct bcma_device *core,
106 const void *buffer, size_t count,
107 u16 offset, u8 reg_width)
Rafał Miłecki9d75ef02011-05-20 03:27:06 +0200108{
109 void __iomem *addr = core->bus->mmio + offset;
110 if (core->bus->mapped_core != core)
111 bcma_host_pci_switch_core(core);
112 switch (reg_width) {
113 case sizeof(u8):
114 iowrite8_rep(addr, buffer, count);
115 break;
116 case sizeof(u16):
117 WARN_ON(count & 1);
118 iowrite16_rep(addr, buffer, count >> 1);
119 break;
120 case sizeof(u32):
121 WARN_ON(count & 3);
122 iowrite32_rep(addr, buffer, count >> 2);
123 break;
124 default:
125 WARN_ON(1);
126 }
127}
128#endif
129
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200130static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
131{
132 if (core->bus->mapped_core != core)
133 bcma_host_pci_switch_core(core);
134 return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
135}
136
137static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
138 u32 value)
139{
140 if (core->bus->mapped_core != core)
141 bcma_host_pci_switch_core(core);
142 iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
143}
144
Hauke Mehrtens94f34572012-08-05 16:54:41 +0200145static const struct bcma_host_ops bcma_host_pci_ops = {
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200146 .read8 = bcma_host_pci_read8,
147 .read16 = bcma_host_pci_read16,
148 .read32 = bcma_host_pci_read32,
149 .write8 = bcma_host_pci_write8,
150 .write16 = bcma_host_pci_write16,
151 .write32 = bcma_host_pci_write32,
Rafał Miłecki9d75ef02011-05-20 03:27:06 +0200152#ifdef CONFIG_BCMA_BLOCKIO
153 .block_read = bcma_host_pci_block_read,
154 .block_write = bcma_host_pci_block_write,
155#endif
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200156 .aread32 = bcma_host_pci_aread32,
157 .awrite32 = bcma_host_pci_awrite32,
158};
159
Greg Kroah-Hartman0f58a012012-12-21 15:12:59 -0800160static int bcma_host_pci_probe(struct pci_dev *dev,
161 const struct pci_device_id *id)
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200162{
163 struct bcma_bus *bus;
164 int err = -ENOMEM;
165 const char *name;
166 u32 val;
167
168 /* Alloc */
169 bus = kzalloc(sizeof(*bus), GFP_KERNEL);
170 if (!bus)
171 goto out;
172
173 /* Basic PCI configuration */
174 err = pci_enable_device(dev);
175 if (err)
176 goto err_kfree_bus;
177
178 name = dev_name(&dev->dev);
179 if (dev->driver && dev->driver->name)
180 name = dev->driver->name;
181 err = pci_request_regions(dev, name);
182 if (err)
183 goto err_pci_disable;
184 pci_set_master(dev);
185
186 /* Disable the RETRY_TIMEOUT register (0x41) to keep
187 * PCI Tx retries from interfering with C3 CPU state */
188 pci_read_config_dword(dev, 0x40, &val);
189 if ((val & 0x0000ff00) != 0)
190 pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
191
192 /* SSB needed additional powering up, do we have any AMBA PCI cards? */
Hauke Mehrtensdfa04152013-10-03 13:49:09 +0200193 if (!pci_is_pcie(dev)) {
194 bcma_err(bus, "PCI card detected, they are not supported.\n");
195 err = -ENXIO;
196 goto err_pci_release_regions;
197 }
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200198
199 /* Map MMIO */
200 err = -ENOMEM;
201 bus->mmio = pci_iomap(dev, 0, ~0UL);
202 if (!bus->mmio)
203 goto err_pci_release_regions;
204
205 /* Host specific */
206 bus->host_pci = dev;
207 bus->hosttype = BCMA_HOSTTYPE_PCI;
208 bus->ops = &bcma_host_pci_ops;
209
Hauke Mehrtens0a2fcaa2012-04-29 02:04:08 +0200210 bus->boardinfo.vendor = bus->host_pci->subsystem_vendor;
211 bus->boardinfo.type = bus->host_pci->subsystem_device;
212
Rafał Miłeckidc8ecdd2014-09-01 23:11:06 +0200213 /* Initialize struct, detect chip */
214 bcma_init_bus(bus);
215
Rafał Miłecki9b6cc9a2015-02-08 17:11:50 +0100216 /* Scan bus to find out generation of PCIe core */
217 err = bcma_bus_scan(bus);
218 if (err)
219 goto err_pci_unmap_mmio;
220
221 if (bcma_find_core(bus, BCMA_CORE_PCIE2))
222 bus->host_is_pcie2 = true;
223
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200224 /* Register */
225 err = bcma_bus_register(bus);
226 if (err)
Rafał Miłecki9b6cc9a2015-02-08 17:11:50 +0100227 goto err_unregister_cores;
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200228
229 pci_set_drvdata(dev, bus);
230
231out:
232 return err;
233
Rafał Miłecki9b6cc9a2015-02-08 17:11:50 +0100234err_unregister_cores:
235 bcma_unregister_cores(bus);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200236err_pci_unmap_mmio:
237 pci_iounmap(dev, bus->mmio);
238err_pci_release_regions:
239 pci_release_regions(dev);
240err_pci_disable:
241 pci_disable_device(dev);
242err_kfree_bus:
243 kfree(bus);
244 return err;
245}
246
Greg Kroah-Hartman0f58a012012-12-21 15:12:59 -0800247static void bcma_host_pci_remove(struct pci_dev *dev)
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200248{
249 struct bcma_bus *bus = pci_get_drvdata(dev);
250
251 bcma_bus_unregister(bus);
252 pci_iounmap(dev, bus->mmio);
253 pci_release_regions(dev);
254 pci_disable_device(dev);
255 kfree(bus);
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200256}
257
Yuanhan Liuccd60952012-10-16 22:59:02 +0800258#ifdef CONFIG_PM_SLEEP
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100259static int bcma_host_pci_suspend(struct device *dev)
Rafał Miłecki775ab522011-12-09 22:16:07 +0100260{
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100261 struct pci_dev *pdev = to_pci_dev(dev);
262 struct bcma_bus *bus = pci_get_drvdata(pdev);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100263
Rafał Miłecki28e7d212012-01-13 23:58:38 +0100264 bus->mapped_core = NULL;
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100265
Linus Torvalds685a4ef2012-01-13 23:58:40 +0100266 return bcma_bus_suspend(bus);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100267}
268
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100269static int bcma_host_pci_resume(struct device *dev)
Rafał Miłecki775ab522011-12-09 22:16:07 +0100270{
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100271 struct pci_dev *pdev = to_pci_dev(dev);
272 struct bcma_bus *bus = pci_get_drvdata(pdev);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100273
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100274 return bcma_bus_resume(bus);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100275}
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100276
277static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend,
278 bcma_host_pci_resume);
279#define BCMA_PM_OPS (&bcma_pm_ops)
280
Yuanhan Liuccd60952012-10-16 22:59:02 +0800281#else /* CONFIG_PM_SLEEP */
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100282
283#define BCMA_PM_OPS NULL
284
Yuanhan Liuccd60952012-10-16 22:59:02 +0800285#endif /* CONFIG_PM_SLEEP */
Rafał Miłecki775ab522011-12-09 22:16:07 +0100286
Jingoo Han342a11e2013-12-03 08:00:27 +0900287static const struct pci_device_id bcma_pci_bridge_tbl[] = {
Rafał Miłecki9594b562011-05-14 10:31:46 +0200288 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
Hauke Mehrtensb9f54bd2013-10-03 13:49:10 +0200289 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4313) },
Rafał Miłecki34b6d422014-10-15 07:51:44 +0200290 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) }, /* 0xa8d8 */
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200291 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
292 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
Rafał Miłecki91fa4b02011-06-17 13:15:23 +0200293 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) },
Rafał Miłecki646e0822012-09-21 08:38:38 +0200294 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4358) },
Rafał Miłeckic263c2c2012-07-23 18:20:12 +0200295 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4359) },
Rafał Miłecki9b6cc9a2015-02-08 17:11:50 +0100296 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4360) },
Rafał Miłecki88f9b652013-06-26 10:02:11 +0200297 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4365) },
Rafał Miłecki9b6cc9a2015-02-08 17:11:50 +0100298 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43a0) },
Rafał Miłeckid1d37992014-07-15 19:44:28 +0200299 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43a9) },
Rafał Miłecki27cfdb02014-07-24 15:29:19 +0200300 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43aa) },
Rafał Miłecki9b6cc9a2015-02-08 17:11:50 +0100301 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43b1) },
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200302 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
Rafał Miłecki34b6d422014-10-15 07:51:44 +0200303 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43227) }, /* 0xa8db, BCM43217 (sic!) */
304 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43228) }, /* 0xa8dc */
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200305 { 0, },
306};
307MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);
308
309static struct pci_driver bcma_pci_bridge_driver = {
310 .name = "bcma-pci-bridge",
311 .id_table = bcma_pci_bridge_tbl,
312 .probe = bcma_host_pci_probe,
Greg Kroah-Hartman0f58a012012-12-21 15:12:59 -0800313 .remove = bcma_host_pci_remove,
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100314 .driver.pm = BCMA_PM_OPS,
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200315};
316
317int __init bcma_host_pci_init(void)
318{
319 return pci_register_driver(&bcma_pci_bridge_driver);
320}
321
322void __exit bcma_host_pci_exit(void)
323{
324 pci_unregister_driver(&bcma_pci_bridge_driver);
325}
Rafał Miłecki41867212015-02-08 17:11:47 +0100326
327/**************************************************
328 * Runtime ops for drivers.
329 **************************************************/
330
331/* See also pcicore_up */
332void bcma_host_pci_up(struct bcma_bus *bus)
333{
334 if (bus->hosttype != BCMA_HOSTTYPE_PCI)
335 return;
336
337 if (bus->host_is_pcie2)
Rafał Miłecki804e27d2015-02-08 17:11:49 +0100338 bcma_core_pcie2_up(&bus->drv_pcie2);
Rafał Miłecki41867212015-02-08 17:11:47 +0100339 else
340 bcma_core_pci_up(&bus->drv_pci[0]);
341}
342EXPORT_SYMBOL_GPL(bcma_host_pci_up);
343
344/* See also pcicore_down */
345void bcma_host_pci_down(struct bcma_bus *bus)
346{
347 if (bus->hosttype != BCMA_HOSTTYPE_PCI)
348 return;
349
350 if (!bus->host_is_pcie2)
351 bcma_core_pci_down(&bus->drv_pci[0]);
352}
353EXPORT_SYMBOL_GPL(bcma_host_pci_down);
Rafał Miłecki702131e2015-03-05 18:25:10 +0100354
355/* See also si_pci_setup */
356int bcma_host_pci_irq_ctl(struct bcma_bus *bus, struct bcma_device *core,
357 bool enable)
358{
359 struct pci_dev *pdev;
360 u32 coremask, tmp;
361 int err = 0;
362
363 if (bus->hosttype != BCMA_HOSTTYPE_PCI) {
364 /* This bcma device is not on a PCI host-bus. So the IRQs are
365 * not routed through the PCI core.
366 * So we must not enable routing through the PCI core. */
367 goto out;
368 }
369
370 pdev = bus->host_pci;
371
372 err = pci_read_config_dword(pdev, BCMA_PCI_IRQMASK, &tmp);
373 if (err)
374 goto out;
375
376 coremask = BIT(core->core_index) << 8;
377 if (enable)
378 tmp |= coremask;
379 else
380 tmp &= ~coremask;
381
382 err = pci_write_config_dword(pdev, BCMA_PCI_IRQMASK, tmp);
383
384out:
385 return err;
386}
387EXPORT_SYMBOL_GPL(bcma_host_pci_irq_ctl);