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 | |
11 | #include "ssb_private.h" |
12 | |
13 | #include <linux/bcm47xx_nvram.h> |
14 | #include <linux/ssb/ssb.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(addr: 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(addr: 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(addr: 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 | 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 | 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 | 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(val: value, addr: 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(val: value, addr: 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(val: value, addr: 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(val: *buf, addr); |
129 | buf++; |
130 | count--; |
131 | } |
132 | break; |
133 | } |
134 | case sizeof(u16): { |
135 | const __le16 *buf = buffer; |
136 | |
137 | WARN_ON(count & 1); |
138 | while (count) { |
139 | __raw_writew(val: (__force u16)(*buf), addr); |
140 | buf++; |
141 | count -= 2; |
142 | } |
143 | break; |
144 | } |
145 | case sizeof(u32): { |
146 | const __le32 *buf = buffer; |
147 | |
148 | WARN_ON(count & 3); |
149 | while (count) { |
150 | __raw_writel(val: (__force u32)(*buf), addr); |
151 | buf++; |
152 | count -= 4; |
153 | } |
154 | break; |
155 | } |
156 | default: |
157 | 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 | }; |
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(name: "boardvendor" , val: buf, val_len: sizeof(buf)); |
186 | if (len > 0) { |
187 | err = kstrtou16(s: strim(buf), base: 0, res: &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(name: "boardtype" , val: buf, val_len: sizeof(buf)); |
196 | if (len > 0) { |
197 | err = kstrtou16(s: strim(buf), base: 0, res: &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, out: &iv->sprom); |
205 | |
206 | if (bcm47xx_nvram_getenv(name: "cardbus" , val: buf, val_len: sizeof(buf)) >= 0) |
207 | iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); |
208 | |
209 | return 0; |
210 | } |
211 | |