dt/sparc: Eliminate users of of_platform_{,un}register_driver
[linux-3.10.git] / arch / sparc / kernel / central.c
1 /* central.c: Central FHC driver for Sunfire/Starfire/Wildfire.
2  *
3  * Copyright (C) 1997, 1999, 2008 David S. Miller (davem@davemloft.net)
4  */
5
6 #include <linux/kernel.h>
7 #include <linux/types.h>
8 #include <linux/slab.h>
9 #include <linux/string.h>
10 #include <linux/init.h>
11 #include <linux/of_device.h>
12 #include <linux/platform_device.h>
13
14 #include <asm/fhc.h>
15 #include <asm/upa.h>
16
17 struct clock_board {
18         void __iomem            *clock_freq_regs;
19         void __iomem            *clock_regs;
20         void __iomem            *clock_ver_reg;
21         int                     num_slots;
22         struct resource         leds_resource;
23         struct platform_device  leds_pdev;
24 };
25
26 struct fhc {
27         void __iomem            *pregs;
28         bool                    central;
29         bool                    jtag_master;
30         int                     board_num;
31         struct resource         leds_resource;
32         struct platform_device  leds_pdev;
33 };
34
35 static int __devinit clock_board_calc_nslots(struct clock_board *p)
36 {
37         u8 reg = upa_readb(p->clock_regs + CLOCK_STAT1) & 0xc0;
38
39         switch (reg) {
40         case 0x40:
41                 return 16;
42
43         case 0xc0:
44                 return 8;
45
46         case 0x80:
47                 reg = 0;
48                 if (p->clock_ver_reg)
49                         reg = upa_readb(p->clock_ver_reg);
50                 if (reg) {
51                         if (reg & 0x80)
52                                 return 4;
53                         else
54                                 return 5;
55                 }
56                 /* Fallthrough */
57         default:
58                 return 4;
59         }
60 }
61
62 static int __devinit clock_board_probe(struct platform_device *op)
63 {
64         struct clock_board *p = kzalloc(sizeof(*p), GFP_KERNEL);
65         int err = -ENOMEM;
66
67         if (!p) {
68                 printk(KERN_ERR "clock_board: Cannot allocate struct clock_board\n");
69                 goto out;
70         }
71
72         p->clock_freq_regs = of_ioremap(&op->resource[0], 0,
73                                         resource_size(&op->resource[0]),
74                                         "clock_board_freq");
75         if (!p->clock_freq_regs) {
76                 printk(KERN_ERR "clock_board: Cannot map clock_freq_regs\n");
77                 goto out_free;
78         }
79
80         p->clock_regs = of_ioremap(&op->resource[1], 0,
81                                    resource_size(&op->resource[1]),
82                                    "clock_board_regs");
83         if (!p->clock_regs) {
84                 printk(KERN_ERR "clock_board: Cannot map clock_regs\n");
85                 goto out_unmap_clock_freq_regs;
86         }
87
88         if (op->resource[2].flags) {
89                 p->clock_ver_reg = of_ioremap(&op->resource[2], 0,
90                                               resource_size(&op->resource[2]),
91                                               "clock_ver_reg");
92                 if (!p->clock_ver_reg) {
93                         printk(KERN_ERR "clock_board: Cannot map clock_ver_reg\n");
94                         goto out_unmap_clock_regs;
95                 }
96         }
97
98         p->num_slots = clock_board_calc_nslots(p);
99
100         p->leds_resource.start = (unsigned long)
101                 (p->clock_regs + CLOCK_CTRL);
102         p->leds_resource.end = p->leds_resource.start;
103         p->leds_resource.name = "leds";
104
105         p->leds_pdev.name = "sunfire-clockboard-leds";
106         p->leds_pdev.id = -1;
107         p->leds_pdev.resource = &p->leds_resource;
108         p->leds_pdev.num_resources = 1;
109         p->leds_pdev.dev.parent = &op->dev;
110
111         err = platform_device_register(&p->leds_pdev);
112         if (err) {
113                 printk(KERN_ERR "clock_board: Could not register LEDS "
114                        "platform device\n");
115                 goto out_unmap_clock_ver_reg;
116         }
117
118         printk(KERN_INFO "clock_board: Detected %d slot Enterprise system.\n",
119                p->num_slots);
120
121         err = 0;
122 out:
123         return err;
124
125 out_unmap_clock_ver_reg:
126         if (p->clock_ver_reg)
127                 of_iounmap(&op->resource[2], p->clock_ver_reg,
128                            resource_size(&op->resource[2]));
129
130 out_unmap_clock_regs:
131         of_iounmap(&op->resource[1], p->clock_regs,
132                    resource_size(&op->resource[1]));
133
134 out_unmap_clock_freq_regs:
135         of_iounmap(&op->resource[0], p->clock_freq_regs,
136                    resource_size(&op->resource[0]));
137
138 out_free:
139         kfree(p);
140         goto out;
141 }
142
143 static struct of_device_id __initdata clock_board_match[] = {
144         {
145                 .name = "clock-board",
146         },
147         {},
148 };
149
150 static struct platform_driver clock_board_driver = {
151         .probe          = clock_board_probe,
152         .driver = {
153                 .name = "clock_board",
154                 .owner = THIS_MODULE,
155                 .of_match_table = clock_board_match,
156         },
157 };
158
159 static int __devinit fhc_probe(struct platform_device *op)
160 {
161         struct fhc *p = kzalloc(sizeof(*p), GFP_KERNEL);
162         int err = -ENOMEM;
163         u32 reg;
164
165         if (!p) {
166                 printk(KERN_ERR "fhc: Cannot allocate struct fhc\n");
167                 goto out;
168         }
169
170         if (!strcmp(op->dev.of_node->parent->name, "central"))
171                 p->central = true;
172
173         p->pregs = of_ioremap(&op->resource[0], 0,
174                               resource_size(&op->resource[0]),
175                               "fhc_pregs");
176         if (!p->pregs) {
177                 printk(KERN_ERR "fhc: Cannot map pregs\n");
178                 goto out_free;
179         }
180
181         if (p->central) {
182                 reg = upa_readl(p->pregs + FHC_PREGS_BSR);
183                 p->board_num = ((reg >> 16) & 1) | ((reg >> 12) & 0x0e);
184         } else {
185                 p->board_num = of_getintprop_default(op->dev.of_node, "board#", -1);
186                 if (p->board_num == -1) {
187                         printk(KERN_ERR "fhc: No board# property\n");
188                         goto out_unmap_pregs;
189                 }
190                 if (upa_readl(p->pregs + FHC_PREGS_JCTRL) & FHC_JTAG_CTRL_MENAB)
191                         p->jtag_master = true;
192         }
193
194         if (!p->central) {
195                 p->leds_resource.start = (unsigned long)
196                         (p->pregs + FHC_PREGS_CTRL);
197                 p->leds_resource.end = p->leds_resource.start;
198                 p->leds_resource.name = "leds";
199
200                 p->leds_pdev.name = "sunfire-fhc-leds";
201                 p->leds_pdev.id = p->board_num;
202                 p->leds_pdev.resource = &p->leds_resource;
203                 p->leds_pdev.num_resources = 1;
204                 p->leds_pdev.dev.parent = &op->dev;
205
206                 err = platform_device_register(&p->leds_pdev);
207                 if (err) {
208                         printk(KERN_ERR "fhc: Could not register LEDS "
209                                "platform device\n");
210                         goto out_unmap_pregs;
211                 }
212         }
213         reg = upa_readl(p->pregs + FHC_PREGS_CTRL);
214
215         if (!p->central)
216                 reg |= FHC_CONTROL_IXIST;
217
218         reg &= ~(FHC_CONTROL_AOFF |
219                  FHC_CONTROL_BOFF |
220                  FHC_CONTROL_SLINE);
221
222         upa_writel(reg, p->pregs + FHC_PREGS_CTRL);
223         upa_readl(p->pregs + FHC_PREGS_CTRL);
224
225         reg = upa_readl(p->pregs + FHC_PREGS_ID);
226         printk(KERN_INFO "fhc: Board #%d, Version[%x] PartID[%x] Manuf[%x] %s\n",
227                p->board_num,
228                (reg & FHC_ID_VERS) >> 28,
229                (reg & FHC_ID_PARTID) >> 12,
230                (reg & FHC_ID_MANUF) >> 1,
231                (p->jtag_master ?
232                 "(JTAG Master)" :
233                 (p->central ? "(Central)" : "")));
234
235         err = 0;
236
237 out:
238         return err;
239
240 out_unmap_pregs:
241         of_iounmap(&op->resource[0], p->pregs, resource_size(&op->resource[0]));
242
243 out_free:
244         kfree(p);
245         goto out;
246 }
247
248 static struct of_device_id __initdata fhc_match[] = {
249         {
250                 .name = "fhc",
251         },
252         {},
253 };
254
255 static struct platform_driver fhc_driver = {
256         .probe          = fhc_probe,
257         .driver = {
258                 .name = "fhc",
259                 .owner = THIS_MODULE,
260                 .of_match_table = fhc_match,
261         },
262 };
263
264 static int __init sunfire_init(void)
265 {
266         (void) platform_driver_register(&fhc_driver);
267         (void) platform_driver_register(&clock_board_driver);
268         return 0;
269 }
270
271 subsys_initcall(sunfire_init);