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830c7df4 RM |
1 | /* |
2 | * Sonics Silicon Backplane SoC host related functions. | |
3 | * Subsystem core | |
4 | * | |
5 | * Copyright 2005, Broadcom Corporation | |
6 | * Copyright 2006, 2007, Michael Buesch <m@bues.ch> | |
7 | * | |
8 | * Licensed under the GNU/GPL. See COPYING for details. | |
9 | */ | |
10 | ||
541c9a84 | 11 | #include <linux/bcm47xx_nvram.h> |
830c7df4 RM |
12 | #include <linux/ssb/ssb.h> |
13 | ||
14 | #include "ssb_private.h" | |
15 | ||
16 | static u8 ssb_host_soc_read8(struct ssb_device *dev, u16 offset) | |
17 | { | |
18 | struct ssb_bus *bus = dev->bus; | |
19 | ||
20 | offset += dev->core_index * SSB_CORE_SIZE; | |
21 | return readb(bus->mmio + offset); | |
22 | } | |
23 | ||
24 | static u16 ssb_host_soc_read16(struct ssb_device *dev, u16 offset) | |
25 | { | |
26 | struct ssb_bus *bus = dev->bus; | |
27 | ||
28 | offset += dev->core_index * SSB_CORE_SIZE; | |
29 | return readw(bus->mmio + offset); | |
30 | } | |
31 | ||
32 | static u32 ssb_host_soc_read32(struct ssb_device *dev, u16 offset) | |
33 | { | |
34 | struct ssb_bus *bus = dev->bus; | |
35 | ||
36 | offset += dev->core_index * SSB_CORE_SIZE; | |
37 | return readl(bus->mmio + offset); | |
38 | } | |
39 | ||
40 | #ifdef CONFIG_SSB_BLOCKIO | |
41 | static void ssb_host_soc_block_read(struct ssb_device *dev, void *buffer, | |
42 | size_t count, u16 offset, u8 reg_width) | |
43 | { | |
44 | struct ssb_bus *bus = dev->bus; | |
45 | void __iomem *addr; | |
46 | ||
47 | offset += dev->core_index * SSB_CORE_SIZE; | |
48 | addr = bus->mmio + offset; | |
49 | ||
50 | switch (reg_width) { | |
51 | case sizeof(u8): { | |
52 | u8 *buf = buffer; | |
53 | ||
54 | while (count) { | |
55 | *buf = __raw_readb(addr); | |
56 | buf++; | |
57 | count--; | |
58 | } | |
59 | break; | |
60 | } | |
61 | case sizeof(u16): { | |
62 | __le16 *buf = buffer; | |
63 | ||
64 | SSB_WARN_ON(count & 1); | |
65 | while (count) { | |
66 | *buf = (__force __le16)__raw_readw(addr); | |
67 | buf++; | |
68 | count -= 2; | |
69 | } | |
70 | break; | |
71 | } | |
72 | case sizeof(u32): { | |
73 | __le32 *buf = buffer; | |
74 | ||
75 | SSB_WARN_ON(count & 3); | |
76 | while (count) { | |
77 | *buf = (__force __le32)__raw_readl(addr); | |
78 | buf++; | |
79 | count -= 4; | |
80 | } | |
81 | break; | |
82 | } | |
83 | default: | |
84 | SSB_WARN_ON(1); | |
85 | } | |
86 | } | |
87 | #endif /* CONFIG_SSB_BLOCKIO */ | |
88 | ||
89 | static void ssb_host_soc_write8(struct ssb_device *dev, u16 offset, u8 value) | |
90 | { | |
91 | struct ssb_bus *bus = dev->bus; | |
92 | ||
93 | offset += dev->core_index * SSB_CORE_SIZE; | |
94 | writeb(value, bus->mmio + offset); | |
95 | } | |
96 | ||
97 | static void ssb_host_soc_write16(struct ssb_device *dev, u16 offset, u16 value) | |
98 | { | |
99 | struct ssb_bus *bus = dev->bus; | |
100 | ||
101 | offset += dev->core_index * SSB_CORE_SIZE; | |
102 | writew(value, bus->mmio + offset); | |
103 | } | |
104 | ||
105 | static void ssb_host_soc_write32(struct ssb_device *dev, u16 offset, u32 value) | |
106 | { | |
107 | struct ssb_bus *bus = dev->bus; | |
108 | ||
109 | offset += dev->core_index * SSB_CORE_SIZE; | |
110 | writel(value, bus->mmio + offset); | |
111 | } | |
112 | ||
113 | #ifdef CONFIG_SSB_BLOCKIO | |
114 | static void ssb_host_soc_block_write(struct ssb_device *dev, const void *buffer, | |
115 | size_t count, u16 offset, u8 reg_width) | |
116 | { | |
117 | struct ssb_bus *bus = dev->bus; | |
118 | void __iomem *addr; | |
119 | ||
120 | offset += dev->core_index * SSB_CORE_SIZE; | |
121 | addr = bus->mmio + offset; | |
122 | ||
123 | switch (reg_width) { | |
124 | case sizeof(u8): { | |
125 | const u8 *buf = buffer; | |
126 | ||
127 | while (count) { | |
128 | __raw_writeb(*buf, addr); | |
129 | buf++; | |
130 | count--; | |
131 | } | |
132 | break; | |
133 | } | |
134 | case sizeof(u16): { | |
135 | const __le16 *buf = buffer; | |
136 | ||
137 | SSB_WARN_ON(count & 1); | |
138 | while (count) { | |
139 | __raw_writew((__force u16)(*buf), addr); | |
140 | buf++; | |
141 | count -= 2; | |
142 | } | |
143 | break; | |
144 | } | |
145 | case sizeof(u32): { | |
146 | const __le32 *buf = buffer; | |
147 | ||
148 | SSB_WARN_ON(count & 3); | |
149 | while (count) { | |
150 | __raw_writel((__force u32)(*buf), addr); | |
151 | buf++; | |
152 | count -= 4; | |
153 | } | |
154 | break; | |
155 | } | |
156 | default: | |
157 | SSB_WARN_ON(1); | |
158 | } | |
159 | } | |
160 | #endif /* CONFIG_SSB_BLOCKIO */ | |
161 | ||
162 | /* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */ | |
163 | const struct ssb_bus_ops ssb_host_soc_ops = { | |
164 | .read8 = ssb_host_soc_read8, | |
165 | .read16 = ssb_host_soc_read16, | |
166 | .read32 = ssb_host_soc_read32, | |
167 | .write8 = ssb_host_soc_write8, | |
168 | .write16 = ssb_host_soc_write16, | |
169 | .write32 = ssb_host_soc_write32, | |
170 | #ifdef CONFIG_SSB_BLOCKIO | |
171 | .block_read = ssb_host_soc_block_read, | |
172 | .block_write = ssb_host_soc_block_write, | |
173 | #endif | |
174 | }; | |
541c9a84 RM |
175 | |
176 | int ssb_host_soc_get_invariants(struct ssb_bus *bus, | |
177 | struct ssb_init_invariants *iv) | |
178 | { | |
179 | char buf[20]; | |
180 | int len, err; | |
181 | ||
182 | /* Fill boardinfo structure */ | |
183 | memset(&iv->boardinfo, 0, sizeof(struct ssb_boardinfo)); | |
184 | ||
185 | len = bcm47xx_nvram_getenv("boardvendor", buf, sizeof(buf)); | |
186 | if (len > 0) { | |
187 | err = kstrtou16(strim(buf), 0, &iv->boardinfo.vendor); | |
188 | if (err) | |
189 | pr_warn("Couldn't parse nvram board vendor entry with value \"%s\"\n", | |
190 | buf); | |
191 | } | |
192 | if (!iv->boardinfo.vendor) | |
193 | iv->boardinfo.vendor = SSB_BOARDVENDOR_BCM; | |
194 | ||
195 | len = bcm47xx_nvram_getenv("boardtype", buf, sizeof(buf)); | |
196 | if (len > 0) { | |
197 | err = kstrtou16(strim(buf), 0, &iv->boardinfo.type); | |
198 | if (err) | |
199 | pr_warn("Couldn't parse nvram board type entry with value \"%s\"\n", | |
200 | buf); | |
201 | } | |
202 | ||
203 | memset(&iv->sprom, 0, sizeof(struct ssb_sprom)); | |
204 | ssb_fill_sprom_with_fallback(bus, &iv->sprom); | |
205 | ||
206 | if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) | |
207 | iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); | |
208 | ||
209 | return 0; | |
210 | } |