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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;
21 pr_debug("Switched to core: 0x%X\n", core->id.id);
22}
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
80void bcma_host_pci_block_read(struct bcma_device *core, void *buffer,
81 size_t count, u16 offset, u8 reg_width)
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
103void bcma_host_pci_block_write(struct bcma_device *core, const void *buffer,
104 size_t count, u16 offset, u8 reg_width)
105{
106 void __iomem *addr = core->bus->mmio + offset;
107 if (core->bus->mapped_core != core)
108 bcma_host_pci_switch_core(core);
109 switch (reg_width) {
110 case sizeof(u8):
111 iowrite8_rep(addr, buffer, count);
112 break;
113 case sizeof(u16):
114 WARN_ON(count & 1);
115 iowrite16_rep(addr, buffer, count >> 1);
116 break;
117 case sizeof(u32):
118 WARN_ON(count & 3);
119 iowrite32_rep(addr, buffer, count >> 2);
120 break;
121 default:
122 WARN_ON(1);
123 }
124}
125#endif
126
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200127static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
128{
129 if (core->bus->mapped_core != core)
130 bcma_host_pci_switch_core(core);
131 return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
132}
133
134static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
135 u32 value)
136{
137 if (core->bus->mapped_core != core)
138 bcma_host_pci_switch_core(core);
139 iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
140}
141
142const struct bcma_host_ops bcma_host_pci_ops = {
143 .read8 = bcma_host_pci_read8,
144 .read16 = bcma_host_pci_read16,
145 .read32 = bcma_host_pci_read32,
146 .write8 = bcma_host_pci_write8,
147 .write16 = bcma_host_pci_write16,
148 .write32 = bcma_host_pci_write32,
Rafał Miłecki9d75ef02011-05-20 03:27:06 +0200149#ifdef CONFIG_BCMA_BLOCKIO
150 .block_read = bcma_host_pci_block_read,
151 .block_write = bcma_host_pci_block_write,
152#endif
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200153 .aread32 = bcma_host_pci_aread32,
154 .awrite32 = bcma_host_pci_awrite32,
155};
156
157static int bcma_host_pci_probe(struct pci_dev *dev,
158 const struct pci_device_id *id)
159{
160 struct bcma_bus *bus;
161 int err = -ENOMEM;
162 const char *name;
163 u32 val;
164
165 /* Alloc */
166 bus = kzalloc(sizeof(*bus), GFP_KERNEL);
167 if (!bus)
168 goto out;
169
170 /* Basic PCI configuration */
171 err = pci_enable_device(dev);
172 if (err)
173 goto err_kfree_bus;
174
175 name = dev_name(&dev->dev);
176 if (dev->driver && dev->driver->name)
177 name = dev->driver->name;
178 err = pci_request_regions(dev, name);
179 if (err)
180 goto err_pci_disable;
181 pci_set_master(dev);
182
183 /* Disable the RETRY_TIMEOUT register (0x41) to keep
184 * PCI Tx retries from interfering with C3 CPU state */
185 pci_read_config_dword(dev, 0x40, &val);
186 if ((val & 0x0000ff00) != 0)
187 pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
188
189 /* SSB needed additional powering up, do we have any AMBA PCI cards? */
190 if (!pci_is_pcie(dev))
191 pr_err("PCI card detected, report problems.\n");
192
193 /* Map MMIO */
194 err = -ENOMEM;
195 bus->mmio = pci_iomap(dev, 0, ~0UL);
196 if (!bus->mmio)
197 goto err_pci_release_regions;
198
199 /* Host specific */
200 bus->host_pci = dev;
201 bus->hosttype = BCMA_HOSTTYPE_PCI;
202 bus->ops = &bcma_host_pci_ops;
203
204 /* Register */
205 err = bcma_bus_register(bus);
206 if (err)
207 goto err_pci_unmap_mmio;
208
209 pci_set_drvdata(dev, bus);
210
211out:
212 return err;
213
214err_pci_unmap_mmio:
215 pci_iounmap(dev, bus->mmio);
216err_pci_release_regions:
217 pci_release_regions(dev);
218err_pci_disable:
219 pci_disable_device(dev);
220err_kfree_bus:
221 kfree(bus);
222 return err;
223}
224
225static void bcma_host_pci_remove(struct pci_dev *dev)
226{
227 struct bcma_bus *bus = pci_get_drvdata(dev);
228
229 bcma_bus_unregister(bus);
230 pci_iounmap(dev, bus->mmio);
231 pci_release_regions(dev);
232 pci_disable_device(dev);
233 kfree(bus);
234 pci_set_drvdata(dev, NULL);
235}
236
Rafał Miłecki775ab522011-12-09 22:16:07 +0100237#ifdef CONFIG_PM
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100238static int bcma_host_pci_suspend(struct device *dev)
Rafał Miłecki775ab522011-12-09 22:16:07 +0100239{
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100240 struct pci_dev *pdev = to_pci_dev(dev);
241 struct bcma_bus *bus = pci_get_drvdata(pdev);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100242
Rafał Miłecki28e7d212012-01-13 23:58:38 +0100243 bus->mapped_core = NULL;
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100244
Linus Torvalds685a4ef2012-01-13 23:58:40 +0100245 return bcma_bus_suspend(bus);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100246}
247
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100248static int bcma_host_pci_resume(struct device *dev)
Rafał Miłecki775ab522011-12-09 22:16:07 +0100249{
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100250 struct pci_dev *pdev = to_pci_dev(dev);
251 struct bcma_bus *bus = pci_get_drvdata(pdev);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100252
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100253 return bcma_bus_resume(bus);
Rafał Miłecki775ab522011-12-09 22:16:07 +0100254}
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100255
256static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend,
257 bcma_host_pci_resume);
258#define BCMA_PM_OPS (&bcma_pm_ops)
259
Rafał Miłecki775ab522011-12-09 22:16:07 +0100260#else /* CONFIG_PM */
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100261
262#define BCMA_PM_OPS NULL
263
Rafał Miłecki775ab522011-12-09 22:16:07 +0100264#endif /* CONFIG_PM */
265
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200266static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = {
Rafał Miłecki9594b562011-05-14 10:31:46 +0200267 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200268 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
269 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
Rafał Miłecki91fa4b02011-06-17 13:15:23 +0200270 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) },
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200271 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
272 { 0, },
273};
274MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);
275
276static struct pci_driver bcma_pci_bridge_driver = {
277 .name = "bcma-pci-bridge",
278 .id_table = bcma_pci_bridge_tbl,
279 .probe = bcma_host_pci_probe,
280 .remove = bcma_host_pci_remove,
Linus Torvalds5d2031f2012-01-13 23:58:39 +0100281 .driver.pm = BCMA_PM_OPS,
Rafał Miłecki8369ae32011-05-09 18:56:46 +0200282};
283
284int __init bcma_host_pci_init(void)
285{
286 return pci_register_driver(&bcma_pci_bridge_driver);
287}
288
289void __exit bcma_host_pci_exit(void)
290{
291 pci_unregister_driver(&bcma_pci_bridge_driver);
292}