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11#include <linux/eisa.h>
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/pci.h>
16#include <linux/types.h>
17
18#include <asm/io.h>
19#include <asm/superio.h>
20
21#define DEBUG_RESOURCES 0
22#define DEBUG_CONFIG 0
23
24#if DEBUG_CONFIG
25# define DBGC(x...) printk(KERN_DEBUG x)
26#else
27# define DBGC(x...)
28#endif
29
30
31#if DEBUG_RESOURCES
32#define DBG_RES(x...) printk(KERN_DEBUG x)
33#else
34#define DBG_RES(x...)
35#endif
36
37struct pci_port_ops *pci_port __ro_after_init;
38struct pci_bios_ops *pci_bios __ro_after_init;
39
40static int pci_hba_count __ro_after_init;
41
42
43#define PCI_HBA_MAX 32
44static struct pci_hba_data *parisc_pci_hba[PCI_HBA_MAX] __ro_after_init;
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59
60#ifdef CONFIG_EISA
61#define EISA_IN(size) if (EISA_bus && (b == 0)) return eisa_in##size(addr)
62#define EISA_OUT(size) if (EISA_bus && (b == 0)) return eisa_out##size(d, addr)
63#else
64#define EISA_IN(size)
65#define EISA_OUT(size)
66#endif
67
68#define PCI_PORT_IN(type, size) \
69u##size in##type (int addr) \
70{ \
71 int b = PCI_PORT_HBA(addr); \
72 EISA_IN(size); \
73 if (!parisc_pci_hba[b]) return (u##size) -1; \
74 return pci_port->in##type(parisc_pci_hba[b], PCI_PORT_ADDR(addr)); \
75} \
76EXPORT_SYMBOL(in##type);
77
78PCI_PORT_IN(b, 8)
79PCI_PORT_IN(w, 16)
80PCI_PORT_IN(l, 32)
81
82
83#define PCI_PORT_OUT(type, size) \
84void out##type (u##size d, int addr) \
85{ \
86 int b = PCI_PORT_HBA(addr); \
87 EISA_OUT(size); \
88 if (!parisc_pci_hba[b]) return; \
89 pci_port->out##type(parisc_pci_hba[b], PCI_PORT_ADDR(addr), d); \
90} \
91EXPORT_SYMBOL(out##type);
92
93PCI_PORT_OUT(b, 8)
94PCI_PORT_OUT(w, 16)
95PCI_PORT_OUT(l, 32)
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101
102static int __init pcibios_init(void)
103{
104 if (!pci_bios)
105 return -1;
106
107 if (pci_bios->init) {
108 pci_bios->init();
109 } else {
110 printk(KERN_WARNING "pci_bios != NULL but init() is!\n");
111 }
112
113
114 pci_cache_line_size = pci_dfl_cache_line_size;
115
116 return 0;
117}
118
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120
121void pcibios_fixup_bus(struct pci_bus *bus)
122{
123 if (pci_bios->fixup_bus) {
124 pci_bios->fixup_bus(bus);
125 } else {
126 printk(KERN_WARNING "pci_bios != NULL but fixup_bus() is!\n");
127 }
128}
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146void pcibios_set_master(struct pci_dev *dev)
147{
148 u8 lat;
149
150
151 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
152 if (lat >= 16) return;
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157
158 pci_write_config_word(dev, PCI_CACHE_LINE_SIZE,
159 (0x80 << 8) | pci_cache_line_size);
160}
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165
166void __ref pcibios_init_bridge(struct pci_dev *dev)
167{
168 unsigned short bridge_ctl, bridge_ctl_new;
169
170
171 if (!dev || (dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
172 return;
173
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177 pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 32);
178
179 pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &bridge_ctl);
180
181 bridge_ctl_new = bridge_ctl | PCI_BRIDGE_CTL_PARITY |
182 PCI_BRIDGE_CTL_SERR | PCI_BRIDGE_CTL_MASTER_ABORT;
183 dev_info(&dev->dev, "Changing bridge control from 0x%08x to 0x%08x\n",
184 bridge_ctl, bridge_ctl_new);
185
186 pci_write_config_word(dev, PCI_BRIDGE_CONTROL, bridge_ctl_new);
187}
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198resource_size_t pcibios_align_resource(void *data, const struct resource *res,
199 resource_size_t size, resource_size_t alignment)
200{
201 resource_size_t mask, align, start = res->start;
202
203 DBG_RES("pcibios_align_resource(%s, (%p) [%lx,%lx]/%x, 0x%lx, 0x%lx)\n",
204 pci_name(((struct pci_dev *) data)),
205 res->parent, res->start, res->end,
206 (int) res->flags, size, alignment);
207
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209 align = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
210
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212 mask = max(alignment, align) - 1;
213 start += mask;
214 start &= ~mask;
215
216 return start;
217}
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226
227int pcibios_enable_device(struct pci_dev *dev, int mask)
228{
229 int err;
230 u16 cmd, old_cmd;
231
232 err = pci_enable_resources(dev, mask);
233 if (err < 0)
234 return err;
235
236 pci_read_config_word(dev, PCI_COMMAND, &cmd);
237 old_cmd = cmd;
238
239 cmd |= (PCI_COMMAND_SERR | PCI_COMMAND_PARITY);
240
241#if 0
242
243 if (dev->bus->bridge_ctl & PCI_BRIDGE_CTL_FAST_BACK)
244 cmd |= PCI_COMMAND_FAST_BACK;
245#endif
246
247 if (cmd != old_cmd) {
248 dev_info(&dev->dev, "enabling SERR and PARITY (%04x -> %04x)\n",
249 old_cmd, cmd);
250 pci_write_config_word(dev, PCI_COMMAND, cmd);
251 }
252 return 0;
253}
254
255
256
257void pcibios_register_hba(struct pci_hba_data *hba)
258{
259 if (pci_hba_count >= PCI_HBA_MAX) {
260 printk(KERN_ERR "PCI: Too many Host Bus Adapters\n");
261 return;
262 }
263
264 parisc_pci_hba[pci_hba_count] = hba;
265 hba->hba_num = pci_hba_count++;
266}
267
268subsys_initcall(pcibios_init);
269