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Commit | Line | Data |
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8369ae33 RM |
1 | /* |
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" | |
ba7328b2 | 9 | #include <linux/slab.h> |
8369ae33 RM |
10 | #include <linux/bcma/bcma.h> |
11 | #include <linux/pci.h> | |
200351c7 | 12 | #include <linux/module.h> |
8369ae33 RM |
13 | |
14 | static 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; | |
3d9d8af3 | 21 | bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id); |
8369ae33 RM |
22 | } |
23 | ||
439678f8 RM |
24 | /* Provides access to the requested core. Returns base offset that has to be |
25 | * used. It makes use of fixed windows when possible. */ | |
26 | static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core) | |
8369ae33 | 27 | { |
439678f8 RM |
28 | 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 | ||
8369ae33 RM |
35 | if (core->bus->mapped_core != core) |
36 | bcma_host_pci_switch_core(core); | |
439678f8 RM |
37 | return 0; |
38 | } | |
39 | ||
40 | static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset) | |
41 | { | |
42 | offset += bcma_host_pci_provide_access_to_core(core); | |
8369ae33 RM |
43 | return ioread8(core->bus->mmio + offset); |
44 | } | |
45 | ||
46 | static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset) | |
47 | { | |
439678f8 | 48 | offset += bcma_host_pci_provide_access_to_core(core); |
8369ae33 RM |
49 | return ioread16(core->bus->mmio + offset); |
50 | } | |
51 | ||
52 | static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset) | |
53 | { | |
439678f8 | 54 | offset += bcma_host_pci_provide_access_to_core(core); |
8369ae33 RM |
55 | return ioread32(core->bus->mmio + offset); |
56 | } | |
57 | ||
58 | static void bcma_host_pci_write8(struct bcma_device *core, u16 offset, | |
59 | u8 value) | |
60 | { | |
439678f8 | 61 | offset += bcma_host_pci_provide_access_to_core(core); |
8369ae33 RM |
62 | iowrite8(value, core->bus->mmio + offset); |
63 | } | |
64 | ||
65 | static void bcma_host_pci_write16(struct bcma_device *core, u16 offset, | |
66 | u16 value) | |
67 | { | |
439678f8 | 68 | offset += bcma_host_pci_provide_access_to_core(core); |
8369ae33 RM |
69 | iowrite16(value, core->bus->mmio + offset); |
70 | } | |
71 | ||
72 | static void bcma_host_pci_write32(struct bcma_device *core, u16 offset, | |
73 | u32 value) | |
74 | { | |
439678f8 | 75 | offset += bcma_host_pci_provide_access_to_core(core); |
8369ae33 RM |
76 | iowrite32(value, core->bus->mmio + offset); |
77 | } | |
78 | ||
9d75ef0f | 79 | #ifdef CONFIG_BCMA_BLOCKIO |
94f3457f HM |
80 | static void bcma_host_pci_block_read(struct bcma_device *core, void *buffer, |
81 | size_t count, u16 offset, u8 reg_width) | |
9d75ef0f RM |
82 | { |
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 | ||
94f3457f HM |
103 | static void bcma_host_pci_block_write(struct bcma_device *core, |
104 | const void *buffer, size_t count, | |
105 | u16 offset, u8 reg_width) | |
9d75ef0f RM |
106 | { |
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 | ||
8369ae33 RM |
128 | static 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 | ||
135 | static 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 | ||
94f3457f | 143 | static const struct bcma_host_ops bcma_host_pci_ops = { |
8369ae33 RM |
144 | .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, | |
9d75ef0f RM |
150 | #ifdef CONFIG_BCMA_BLOCKIO |
151 | .block_read = bcma_host_pci_block_read, | |
152 | .block_write = bcma_host_pci_block_write, | |
153 | #endif | |
8369ae33 RM |
154 | .aread32 = bcma_host_pci_aread32, |
155 | .awrite32 = bcma_host_pci_awrite32, | |
156 | }; | |
157 | ||
0f58a01d GKH |
158 | static int bcma_host_pci_probe(struct pci_dev *dev, |
159 | const struct pci_device_id *id) | |
8369ae33 RM |
160 | { |
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)) | |
3d9d8af3 | 192 | bcma_err(bus, "PCI card detected, report problems.\n"); |
8369ae33 RM |
193 | |
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 | ||
0a2fcaa7 HM |
205 | bus->boardinfo.vendor = bus->host_pci->subsystem_vendor; |
206 | bus->boardinfo.type = bus->host_pci->subsystem_device; | |
207 | ||
8369ae33 RM |
208 | /* Register */ |
209 | err = bcma_bus_register(bus); | |
210 | if (err) | |
211 | goto err_pci_unmap_mmio; | |
212 | ||
213 | pci_set_drvdata(dev, bus); | |
214 | ||
215 | out: | |
216 | return err; | |
217 | ||
218 | err_pci_unmap_mmio: | |
219 | pci_iounmap(dev, bus->mmio); | |
220 | err_pci_release_regions: | |
221 | pci_release_regions(dev); | |
222 | err_pci_disable: | |
223 | pci_disable_device(dev); | |
224 | err_kfree_bus: | |
225 | kfree(bus); | |
226 | return err; | |
227 | } | |
228 | ||
0f58a01d | 229 | static void bcma_host_pci_remove(struct pci_dev *dev) |
8369ae33 RM |
230 | { |
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 | ||
ccd60953 | 241 | #ifdef CONFIG_PM_SLEEP |
5d2031f2 | 242 | static int bcma_host_pci_suspend(struct device *dev) |
775ab521 | 243 | { |
5d2031f2 LT |
244 | struct pci_dev *pdev = to_pci_dev(dev); |
245 | struct bcma_bus *bus = pci_get_drvdata(pdev); | |
775ab521 | 246 | |
28e7d218 | 247 | bus->mapped_core = NULL; |
5d2031f2 | 248 | |
685a4ef0 | 249 | return bcma_bus_suspend(bus); |
775ab521 RM |
250 | } |
251 | ||
5d2031f2 | 252 | static int bcma_host_pci_resume(struct device *dev) |
775ab521 | 253 | { |
5d2031f2 LT |
254 | struct pci_dev *pdev = to_pci_dev(dev); |
255 | struct bcma_bus *bus = pci_get_drvdata(pdev); | |
775ab521 | 256 | |
5d2031f2 LT |
257 | return bcma_bus_resume(bus); |
258 | } | |
775ab521 | 259 | |
5d2031f2 LT |
260 | static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend, |
261 | bcma_host_pci_resume); | |
262 | #define BCMA_PM_OPS (&bcma_pm_ops) | |
775ab521 | 263 | |
ccd60953 | 264 | #else /* CONFIG_PM_SLEEP */ |
5d2031f2 LT |
265 | |
266 | #define BCMA_PM_OPS NULL | |
267 | ||
ccd60953 | 268 | #endif /* CONFIG_PM_SLEEP */ |
775ab521 | 269 | |
8369ae33 | 270 | static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = { |
9594b56d | 271 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) }, |
02817be0 | 272 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) }, |
8369ae33 RM |
273 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) }, |
274 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) }, | |
91fa4b0a | 275 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) }, |
646e0827 | 276 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4358) }, |
c263c2c1 | 277 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4359) }, |
88f9b65d | 278 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4365) }, |
8369ae33 RM |
279 | { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) }, |
280 | { 0, }, | |
281 | }; | |
282 | MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl); | |
283 | ||
284 | static struct pci_driver bcma_pci_bridge_driver = { | |
285 | .name = "bcma-pci-bridge", | |
286 | .id_table = bcma_pci_bridge_tbl, | |
287 | .probe = bcma_host_pci_probe, | |
0f58a01d | 288 | .remove = bcma_host_pci_remove, |
5d2031f2 | 289 | .driver.pm = BCMA_PM_OPS, |
8369ae33 RM |
290 | }; |
291 | ||
292 | int __init bcma_host_pci_init(void) | |
293 | { | |
294 | return pci_register_driver(&bcma_pci_bridge_driver); | |
295 | } | |
296 | ||
297 | void __exit bcma_host_pci_exit(void) | |
298 | { | |
299 | pci_unregister_driver(&bcma_pci_bridge_driver); | |
300 | } |