blob: b6b4b5ebd4c2560255b3a53bbceae0a814723e96 [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{
16 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
17 core->addr);
18 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN2,
19 core->wrap);
20 core->bus->mapped_core = core;
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +020021 bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020022}
23
Rafał Miłecki439678f2011-12-05 19:13:39 +010024/* Provides access to the requested core. Returns base offset that has to be
25 * used. It makes use of fixed windows when possible. */
26static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core)
Rafał Miłecki8369ae32011-05-09 18:56:46 +020027{
Rafał Miłecki439678f2011-12-05 19:13:39 +010028 switch (core->id.id) {
29 case BCMA_CORE_CHIPCOMMON:
30 return 3 * BCMA_CORE_SIZE;
31 case BCMA_CORE_PCIE:
32 return 2 * BCMA_CORE_SIZE;
33 }
34
Rafał Miłecki8369ae32011-05-09 18:56:46 +020035 if (core->bus->mapped_core != core)
36 bcma_host_pci_switch_core(core);
Rafał Miłecki439678f2011-12-05 19:13:39 +010037 return 0;
38}
39
40static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
41{
42 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020043 return ioread8(core->bus->mmio + offset);
44}
45
46static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
47{
Rafał Miłecki439678f2011-12-05 19:13:39 +010048 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020049 return ioread16(core->bus->mmio + offset);
50}
51
52static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
53{
Rafał Miłecki439678f2011-12-05 19:13:39 +010054 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020055 return ioread32(core->bus->mmio + offset);
56}
57
58static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
59 u8 value)
60{
Rafał Miłecki439678f2011-12-05 19:13:39 +010061 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020062 iowrite8(value, core->bus->mmio + offset);
63}
64
65static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
66 u16 value)
67{
Rafał Miłecki439678f2011-12-05 19:13:39 +010068 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020069 iowrite16(value, core->bus->mmio + offset);
70}
71
72static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
73 u32 value)
74{
Rafał Miłecki439678f2011-12-05 19:13:39 +010075 offset += bcma_host_pci_provide_access_to_core(core);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020076 iowrite32(value, core->bus->mmio + offset);
77}
78
Rafał Miłecki9d75ef02011-05-20 03:27:06 +020079#ifdef CONFIG_BCMA_BLOCKIO
Hauke Mehrtens94f34572012-08-05 16:54:41 +020080static void bcma_host_pci_block_read(struct bcma_device *core, void *buffer,
81 size_t count, u16 offset, u8 reg_width)
Rafał Miłecki9d75ef02011-05-20 03:27:06 +020082{
83 void __iomem *addr = core->bus->mmio + offset;
84 if (core->bus->mapped_core != core)
85 bcma_host_pci_switch_core(core);
86 switch (reg_width) {
87 case sizeof(u8):
88 ioread8_rep(addr, buffer, count);
89 break;
90 case sizeof(u16):
91 WARN_ON(count & 1);
92 ioread16_rep(addr, buffer, count >> 1);
93 break;
94 case sizeof(u32):
95 WARN_ON(count & 3);
96 ioread32_rep(addr, buffer, count >> 2);
97 break;
98 default:
99 WARN_ON(1);
100 }
101}
102
Hauke Mehrtens94f34572012-08-05 16:54:41 +0200103static void bcma_host_pci_block_write(struct bcma_device *core,
104 const void *buffer, size_t count,
105 u16 offset, u8 reg_width)
Rafał Miłecki9d75ef02011-05-20 03:27:06 +0200106{
107 void __iomem *addr = core->bus->mmio + offset;
108 if (core->bus->mapped_core != core)
109 bcma_host_pci_switch_core(core);
110 switch (reg_width) {
111 case sizeof(u8):
112 iowrite8_rep(addr, buffer, count);
113 break;
114 case sizeof(u16):
115 WARN_ON(count & 1);
116 iowrite16_rep(addr, buffer, count >> 1);
117 break;
118 case sizeof(u32):
119 WARN_ON(count & 3);
120 iowrite32_rep(addr, buffer, count >> 2);
121 break;
122 default:
123 WARN_ON(1);
124 }
125}
126#endif
127
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200128static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
129{
130 if (core->bus->mapped_core != core)
131 bcma_host_pci_switch_core(core);
132 return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
133}
134
135static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
136 u32 value)
137{
138 if (core->bus->mapped_core != core)
139 bcma_host_pci_switch_core(core);
140 iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
141}
142
Hauke Mehrtens94f34572012-08-05 16:54:41 +0200143static const struct bcma_host_ops bcma_host_pci_ops = {
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200144 .read8 = bcma_host_pci_read8,
145 .read16 = bcma_host_pci_read16,
146 .read32 = bcma_host_pci_read32,
147 .write8 = bcma_host_pci_write8,
148 .write16 = bcma_host_pci_write16,
149 .write32 = bcma_host_pci_write32,
Rafał Miłecki9d75ef02011-05-20 03:27:06 +0200150#ifdef CONFIG_BCMA_BLOCKIO
151 .block_read = bcma_host_pci_block_read,
152 .block_write = bcma_host_pci_block_write,
153#endif
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200154 .aread32 = bcma_host_pci_aread32,
155 .awrite32 = bcma_host_pci_awrite32,
156};
157
Hauke Mehrtensd1a7a8e2012-01-31 00:03:34 +0100158static int __devinit bcma_host_pci_probe(struct pci_dev *dev,
159 const struct pci_device_id *id)
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200160{
161 struct bcma_bus *bus;
162 int err = -ENOMEM;
163 const char *name;
164 u32 val;
165
166 /* Alloc */
167 bus = kzalloc(sizeof(*bus), GFP_KERNEL);
168 if (!bus)
169 goto out;
170
171 /* Basic PCI configuration */
172 err = pci_enable_device(dev);
173 if (err)
174 goto err_kfree_bus;
175
176 name = dev_name(&dev->dev);
177 if (dev->driver && dev->driver->name)
178 name = dev->driver->name;
179 err = pci_request_regions(dev, name);
180 if (err)
181 goto err_pci_disable;
182 pci_set_master(dev);
183
184 /* Disable the RETRY_TIMEOUT register (0x41) to keep
185 * PCI Tx retries from interfering with C3 CPU state */
186 pci_read_config_dword(dev, 0x40, &val);
187 if ((val & 0x0000ff00) != 0)
188 pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
189
190 /* SSB needed additional powering up, do we have any AMBA PCI cards? */
191 if (!pci_is_pcie(dev))
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200192 bcma_err(bus, "PCI card detected, report problems.\n");
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200193
194 /* Map MMIO */
195 err = -ENOMEM;
196 bus->mmio = pci_iomap(dev, 0, ~0UL);
197 if (!bus->mmio)
198 goto err_pci_release_regions;
199
200 /* Host specific */
201 bus->host_pci = dev;
202 bus->hosttype = BCMA_HOSTTYPE_PCI;
203 bus->ops = &bcma_host_pci_ops;
204
Hauke Mehrtens0a2fcaa2012-04-29 02:04:08 +0200205 bus->boardinfo.vendor = bus->host_pci->subsystem_vendor;
206 bus->boardinfo.type = bus->host_pci->subsystem_device;
207
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200208 /* Register */
209 err = bcma_bus_register(bus);
210 if (err)
211 goto err_pci_unmap_mmio;
212
213 pci_set_drvdata(dev, bus);
214
215out:
216 return err;
217
218err_pci_unmap_mmio:
219 pci_iounmap(dev, bus->mmio);
220err_pci_release_regions:
221 pci_release_regions(dev);
222err_pci_disable:
223 pci_disable_device(dev);
224err_kfree_bus:
225 kfree(bus);
226 return err;
227}
228
Nathan Hintz16d75fa2012-05-04 21:56:35 -0700229static void __devexit bcma_host_pci_remove(struct pci_dev *dev)
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200230{
231 struct bcma_bus *bus = pci_get_drvdata(dev);
232
233 bcma_bus_unregister(bus);
234 pci_iounmap(dev, bus->mmio);
235 pci_release_regions(dev);
236 pci_disable_device(dev);
237 kfree(bus);
238 pci_set_drvdata(dev, NULL);
239}
240
Rafał Miłecki775ab522011-12-09 22:16:07 +0100241#ifdef CONFIG_PM
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100242static int bcma_host_pci_suspend(struct device *dev)
Rafał Miłecki775ab522011-12-09 22:16:07 +0100243{
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100244 struct pci_dev *pdev = to_pci_dev(dev);
245 struct bcma_bus *bus = pci_get_drvdata(pdev);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100246
Rafał Miłecki28e7d212012-01-13 23:58:38 +0100247 bus->mapped_core = NULL;
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100248
Linus Torvalds685a4ef2012-01-13 23:58:40 +0100249 return bcma_bus_suspend(bus);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100250}
251
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100252static int bcma_host_pci_resume(struct device *dev)
Rafał Miłecki775ab522011-12-09 22:16:07 +0100253{
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100254 struct pci_dev *pdev = to_pci_dev(dev);
255 struct bcma_bus *bus = pci_get_drvdata(pdev);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100256
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100257 return bcma_bus_resume(bus);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100258}
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100259
260static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend,
261 bcma_host_pci_resume);
262#define BCMA_PM_OPS (&bcma_pm_ops)
263
Rafał Miłecki775ab522011-12-09 22:16:07 +0100264#else /* CONFIG_PM */
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100265
266#define BCMA_PM_OPS NULL
267
Rafał Miłecki775ab522011-12-09 22:16:07 +0100268#endif /* CONFIG_PM */
269
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200270static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = {
Rafał Miłecki9594b562011-05-14 10:31:46 +0200271 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
Hauke Mehrtens02817be2012-06-30 01:44:40 +0200272 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) },
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200273 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
274 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
Rafał Miłecki91fa4b02011-06-17 13:15:23 +0200275 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) },
Rafał Miłecki646e0822012-09-21 08:38:38 +0200276 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4358) },
Rafał Miłeckic263c2c2012-07-23 18:20:12 +0200277 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4359) },
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200278 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
279 { 0, },
280};
281MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);
282
283static struct pci_driver bcma_pci_bridge_driver = {
284 .name = "bcma-pci-bridge",
285 .id_table = bcma_pci_bridge_tbl,
286 .probe = bcma_host_pci_probe,
Nathan Hintz16d75fa2012-05-04 21:56:35 -0700287 .remove = __devexit_p(bcma_host_pci_remove),
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100288 .driver.pm = BCMA_PM_OPS,
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200289};
290
291int __init bcma_host_pci_init(void)
292{
293 return pci_register_driver(&bcma_pci_bridge_driver);
294}
295
296void __exit bcma_host_pci_exit(void)
297{
298 pci_unregister_driver(&bcma_pci_bridge_driver);
299}