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Commit | Line | Data |
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d979f179 | 1 | /* central.c: Central FHC driver for Sunfire/Starfire/Wildfire. |
1da177e4 | 2 | * |
b69416b5 | 3 | * Copyright (C) 1997, 1999, 2008 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | */ |
5 | ||
6 | #include <linux/kernel.h> | |
7 | #include <linux/types.h> | |
5a0e3ad6 | 8 | #include <linux/slab.h> |
7b64db60 | 9 | #include <linux/export.h> |
1da177e4 | 10 | #include <linux/string.h> |
1da177e4 | 11 | #include <linux/init.h> |
b69416b5 DM |
12 | #include <linux/of_device.h> |
13 | #include <linux/platform_device.h> | |
1da177e4 | 14 | |
1da177e4 | 15 | #include <asm/fhc.h> |
b69416b5 DM |
16 | #include <asm/upa.h> |
17 | ||
18 | struct clock_board { | |
19 | void __iomem *clock_freq_regs; | |
20 | void __iomem *clock_regs; | |
21 | void __iomem *clock_ver_reg; | |
22 | int num_slots; | |
23 | struct resource leds_resource; | |
24 | struct platform_device leds_pdev; | |
25 | }; | |
26 | ||
27 | struct fhc { | |
28 | void __iomem *pregs; | |
29 | bool central; | |
30 | bool jtag_master; | |
31 | int board_num; | |
32 | struct resource leds_resource; | |
33 | struct platform_device leds_pdev; | |
34 | }; | |
35 | ||
7c9503b8 | 36 | static int clock_board_calc_nslots(struct clock_board *p) |
b69416b5 DM |
37 | { |
38 | u8 reg = upa_readb(p->clock_regs + CLOCK_STAT1) & 0xc0; | |
1da177e4 | 39 | |
b69416b5 DM |
40 | switch (reg) { |
41 | case 0x40: | |
42 | return 16; | |
1da177e4 | 43 | |
b69416b5 DM |
44 | case 0xc0: |
45 | return 8; | |
1da177e4 | 46 | |
b69416b5 DM |
47 | case 0x80: |
48 | reg = 0; | |
49 | if (p->clock_ver_reg) | |
50 | reg = upa_readb(p->clock_ver_reg); | |
51 | if (reg) { | |
52 | if (reg & 0x80) | |
53 | return 4; | |
54 | else | |
55 | return 5; | |
56 | } | |
57 | /* Fallthrough */ | |
58 | default: | |
59 | return 4; | |
cecc4e92 | 60 | } |
1da177e4 LT |
61 | } |
62 | ||
7c9503b8 | 63 | static int clock_board_probe(struct platform_device *op) |
1da177e4 | 64 | { |
b69416b5 DM |
65 | struct clock_board *p = kzalloc(sizeof(*p), GFP_KERNEL); |
66 | int err = -ENOMEM; | |
1da177e4 | 67 | |
b69416b5 DM |
68 | if (!p) { |
69 | printk(KERN_ERR "clock_board: Cannot allocate struct clock_board\n"); | |
70 | goto out; | |
1da177e4 | 71 | } |
1da177e4 | 72 | |
b69416b5 DM |
73 | p->clock_freq_regs = of_ioremap(&op->resource[0], 0, |
74 | resource_size(&op->resource[0]), | |
75 | "clock_board_freq"); | |
76 | if (!p->clock_freq_regs) { | |
77 | printk(KERN_ERR "clock_board: Cannot map clock_freq_regs\n"); | |
78 | goto out_free; | |
79 | } | |
1da177e4 | 80 | |
b69416b5 DM |
81 | p->clock_regs = of_ioremap(&op->resource[1], 0, |
82 | resource_size(&op->resource[1]), | |
83 | "clock_board_regs"); | |
84 | if (!p->clock_regs) { | |
85 | printk(KERN_ERR "clock_board: Cannot map clock_regs\n"); | |
86 | goto out_unmap_clock_freq_regs; | |
87 | } | |
1da177e4 | 88 | |
b69416b5 DM |
89 | if (op->resource[2].flags) { |
90 | p->clock_ver_reg = of_ioremap(&op->resource[2], 0, | |
91 | resource_size(&op->resource[2]), | |
92 | "clock_ver_reg"); | |
93 | if (!p->clock_ver_reg) { | |
94 | printk(KERN_ERR "clock_board: Cannot map clock_ver_reg\n"); | |
95 | goto out_unmap_clock_regs; | |
96 | } | |
97 | } | |
1da177e4 | 98 | |
b69416b5 | 99 | p->num_slots = clock_board_calc_nslots(p); |
1da177e4 | 100 | |
b69416b5 DM |
101 | p->leds_resource.start = (unsigned long) |
102 | (p->clock_regs + CLOCK_CTRL); | |
09317146 | 103 | p->leds_resource.end = p->leds_resource.start; |
b69416b5 | 104 | p->leds_resource.name = "leds"; |
1da177e4 | 105 | |
b69416b5 | 106 | p->leds_pdev.name = "sunfire-clockboard-leds"; |
b7c18c1b | 107 | p->leds_pdev.id = -1; |
b69416b5 DM |
108 | p->leds_pdev.resource = &p->leds_resource; |
109 | p->leds_pdev.num_resources = 1; | |
110 | p->leds_pdev.dev.parent = &op->dev; | |
1da177e4 | 111 | |
b69416b5 DM |
112 | err = platform_device_register(&p->leds_pdev); |
113 | if (err) { | |
114 | printk(KERN_ERR "clock_board: Could not register LEDS " | |
115 | "platform device\n"); | |
116 | goto out_unmap_clock_ver_reg; | |
1da177e4 | 117 | } |
1da177e4 | 118 | |
b69416b5 DM |
119 | printk(KERN_INFO "clock_board: Detected %d slot Enterprise system.\n", |
120 | p->num_slots); | |
1da177e4 | 121 | |
b69416b5 DM |
122 | err = 0; |
123 | out: | |
124 | return err; | |
1da177e4 | 125 | |
b69416b5 DM |
126 | out_unmap_clock_ver_reg: |
127 | if (p->clock_ver_reg) | |
128 | of_iounmap(&op->resource[2], p->clock_ver_reg, | |
129 | resource_size(&op->resource[2])); | |
cecc4e92 | 130 | |
b69416b5 DM |
131 | out_unmap_clock_regs: |
132 | of_iounmap(&op->resource[1], p->clock_regs, | |
133 | resource_size(&op->resource[1])); | |
1da177e4 | 134 | |
b69416b5 DM |
135 | out_unmap_clock_freq_regs: |
136 | of_iounmap(&op->resource[0], p->clock_freq_regs, | |
137 | resource_size(&op->resource[0])); | |
1da177e4 | 138 | |
b69416b5 DM |
139 | out_free: |
140 | kfree(p); | |
141 | goto out; | |
1da177e4 LT |
142 | } |
143 | ||
3628aa06 | 144 | static const struct of_device_id clock_board_match[] = { |
b69416b5 DM |
145 | { |
146 | .name = "clock-board", | |
147 | }, | |
148 | {}, | |
149 | }; | |
150 | ||
4ebb24f7 | 151 | static struct platform_driver clock_board_driver = { |
b69416b5 | 152 | .probe = clock_board_probe, |
4018294b GL |
153 | .driver = { |
154 | .name = "clock_board", | |
155 | .owner = THIS_MODULE, | |
156 | .of_match_table = clock_board_match, | |
b69416b5 DM |
157 | }, |
158 | }; | |
159 | ||
7c9503b8 | 160 | static int fhc_probe(struct platform_device *op) |
1da177e4 | 161 | { |
b69416b5 DM |
162 | struct fhc *p = kzalloc(sizeof(*p), GFP_KERNEL); |
163 | int err = -ENOMEM; | |
164 | u32 reg; | |
1da177e4 | 165 | |
b69416b5 DM |
166 | if (!p) { |
167 | printk(KERN_ERR "fhc: Cannot allocate struct fhc\n"); | |
168 | goto out; | |
1da177e4 LT |
169 | } |
170 | ||
61c7a080 | 171 | if (!strcmp(op->dev.of_node->parent->name, "central")) |
b69416b5 | 172 | p->central = true; |
1da177e4 | 173 | |
b69416b5 DM |
174 | p->pregs = of_ioremap(&op->resource[0], 0, |
175 | resource_size(&op->resource[0]), | |
176 | "fhc_pregs"); | |
177 | if (!p->pregs) { | |
178 | printk(KERN_ERR "fhc: Cannot map pregs\n"); | |
179 | goto out_free; | |
cecc4e92 | 180 | } |
1da177e4 | 181 | |
b69416b5 DM |
182 | if (p->central) { |
183 | reg = upa_readl(p->pregs + FHC_PREGS_BSR); | |
184 | p->board_num = ((reg >> 16) & 1) | ((reg >> 12) & 0x0e); | |
185 | } else { | |
61c7a080 | 186 | p->board_num = of_getintprop_default(op->dev.of_node, "board#", -1); |
b69416b5 DM |
187 | if (p->board_num == -1) { |
188 | printk(KERN_ERR "fhc: No board# property\n"); | |
189 | goto out_unmap_pregs; | |
190 | } | |
191 | if (upa_readl(p->pregs + FHC_PREGS_JCTRL) & FHC_JTAG_CTRL_MENAB) | |
192 | p->jtag_master = true; | |
193 | } | |
1da177e4 | 194 | |
b69416b5 DM |
195 | if (!p->central) { |
196 | p->leds_resource.start = (unsigned long) | |
197 | (p->pregs + FHC_PREGS_CTRL); | |
09317146 | 198 | p->leds_resource.end = p->leds_resource.start; |
b69416b5 DM |
199 | p->leds_resource.name = "leds"; |
200 | ||
201 | p->leds_pdev.name = "sunfire-fhc-leds"; | |
b7c18c1b | 202 | p->leds_pdev.id = p->board_num; |
b69416b5 DM |
203 | p->leds_pdev.resource = &p->leds_resource; |
204 | p->leds_pdev.num_resources = 1; | |
205 | p->leds_pdev.dev.parent = &op->dev; | |
206 | ||
207 | err = platform_device_register(&p->leds_pdev); | |
208 | if (err) { | |
209 | printk(KERN_ERR "fhc: Could not register LEDS " | |
210 | "platform device\n"); | |
211 | goto out_unmap_pregs; | |
212 | } | |
213 | } | |
214 | reg = upa_readl(p->pregs + FHC_PREGS_CTRL); | |
1da177e4 | 215 | |
b69416b5 DM |
216 | if (!p->central) |
217 | reg |= FHC_CONTROL_IXIST; | |
1da177e4 | 218 | |
b69416b5 DM |
219 | reg &= ~(FHC_CONTROL_AOFF | |
220 | FHC_CONTROL_BOFF | | |
221 | FHC_CONTROL_SLINE); | |
1da177e4 | 222 | |
b69416b5 DM |
223 | upa_writel(reg, p->pregs + FHC_PREGS_CTRL); |
224 | upa_readl(p->pregs + FHC_PREGS_CTRL); | |
1da177e4 | 225 | |
b69416b5 DM |
226 | reg = upa_readl(p->pregs + FHC_PREGS_ID); |
227 | printk(KERN_INFO "fhc: Board #%d, Version[%x] PartID[%x] Manuf[%x] %s\n", | |
228 | p->board_num, | |
229 | (reg & FHC_ID_VERS) >> 28, | |
230 | (reg & FHC_ID_PARTID) >> 12, | |
231 | (reg & FHC_ID_MANUF) >> 1, | |
232 | (p->jtag_master ? | |
233 | "(JTAG Master)" : | |
234 | (p->central ? "(Central)" : ""))); | |
1da177e4 | 235 | |
b69416b5 | 236 | err = 0; |
1da177e4 | 237 | |
b69416b5 DM |
238 | out: |
239 | return err; | |
1da177e4 | 240 | |
b69416b5 DM |
241 | out_unmap_pregs: |
242 | of_iounmap(&op->resource[0], p->pregs, resource_size(&op->resource[0])); | |
1da177e4 | 243 | |
b69416b5 DM |
244 | out_free: |
245 | kfree(p); | |
246 | goto out; | |
1da177e4 LT |
247 | } |
248 | ||
3628aa06 | 249 | static const struct of_device_id fhc_match[] = { |
b69416b5 DM |
250 | { |
251 | .name = "fhc", | |
252 | }, | |
253 | {}, | |
254 | }; | |
255 | ||
4ebb24f7 | 256 | static struct platform_driver fhc_driver = { |
b69416b5 | 257 | .probe = fhc_probe, |
4018294b GL |
258 | .driver = { |
259 | .name = "fhc", | |
260 | .owner = THIS_MODULE, | |
261 | .of_match_table = fhc_match, | |
b69416b5 DM |
262 | }, |
263 | }; | |
264 | ||
265 | static int __init sunfire_init(void) | |
1da177e4 | 266 | { |
4ebb24f7 GL |
267 | (void) platform_driver_register(&fhc_driver); |
268 | (void) platform_driver_register(&clock_board_driver); | |
b69416b5 | 269 | return 0; |
1da177e4 | 270 | } |
b69416b5 | 271 | |
a5a737e0 | 272 | fs_initcall(sunfire_init); |