Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
[linux-3.10.git] / arch / arm / mach-shmobile / setup-r8a7740.c
1 /*
2  * R8A7740 processor support
3  *
4  * Copyright (C) 2011  Renesas Solutions Corp.
5  * Copyright (C) 2011  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; version 2 of the License.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19  */
20 #include <linux/delay.h>
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/io.h>
24 #include <linux/platform_device.h>
25 #include <linux/serial_sci.h>
26 #include <linux/sh_timer.h>
27 #include <mach/r8a7740.h>
28 #include <mach/common.h>
29 #include <mach/irqs.h>
30 #include <asm/mach-types.h>
31 #include <asm/mach/map.h>
32 #include <asm/mach/arch.h>
33 #include <asm/mach/time.h>
34
35 static struct map_desc r8a7740_io_desc[] __initdata = {
36          /*
37           * for CPGA/INTC/PFC
38           * 0xe6000000-0xefffffff -> 0xe6000000-0xefffffff
39           */
40         {
41                 .virtual        = 0xe6000000,
42                 .pfn            = __phys_to_pfn(0xe6000000),
43                 .length         = 160 << 20,
44                 .type           = MT_DEVICE_NONSHARED
45         },
46 #ifdef CONFIG_CACHE_L2X0
47         /*
48          * for l2x0_init()
49          * 0xf0100000-0xf0101000 -> 0xf0002000-0xf0003000
50          */
51         {
52                 .virtual        = 0xf0002000,
53                 .pfn            = __phys_to_pfn(0xf0100000),
54                 .length         = PAGE_SIZE,
55                 .type           = MT_DEVICE_NONSHARED
56         },
57 #endif
58 };
59
60 void __init r8a7740_map_io(void)
61 {
62         iotable_init(r8a7740_io_desc, ARRAY_SIZE(r8a7740_io_desc));
63 }
64
65 /* SCIFA0 */
66 static struct plat_sci_port scif0_platform_data = {
67         .mapbase        = 0xe6c40000,
68         .flags          = UPF_BOOT_AUTOCONF,
69         .scscr          = SCSCR_RE | SCSCR_TE,
70         .scbrr_algo_id  = SCBRR_ALGO_4,
71         .type           = PORT_SCIFA,
72         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c00)),
73 };
74
75 static struct platform_device scif0_device = {
76         .name           = "sh-sci",
77         .id             = 0,
78         .dev            = {
79                 .platform_data  = &scif0_platform_data,
80         },
81 };
82
83 /* SCIFA1 */
84 static struct plat_sci_port scif1_platform_data = {
85         .mapbase        = 0xe6c50000,
86         .flags          = UPF_BOOT_AUTOCONF,
87         .scscr          = SCSCR_RE | SCSCR_TE,
88         .scbrr_algo_id  = SCBRR_ALGO_4,
89         .type           = PORT_SCIFA,
90         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c20)),
91 };
92
93 static struct platform_device scif1_device = {
94         .name           = "sh-sci",
95         .id             = 1,
96         .dev            = {
97                 .platform_data  = &scif1_platform_data,
98         },
99 };
100
101 /* SCIFA2 */
102 static struct plat_sci_port scif2_platform_data = {
103         .mapbase        = 0xe6c60000,
104         .flags          = UPF_BOOT_AUTOCONF,
105         .scscr          = SCSCR_RE | SCSCR_TE,
106         .scbrr_algo_id  = SCBRR_ALGO_4,
107         .type           = PORT_SCIFA,
108         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c40)),
109 };
110
111 static struct platform_device scif2_device = {
112         .name           = "sh-sci",
113         .id             = 2,
114         .dev            = {
115                 .platform_data  = &scif2_platform_data,
116         },
117 };
118
119 /* SCIFA3 */
120 static struct plat_sci_port scif3_platform_data = {
121         .mapbase        = 0xe6c70000,
122         .flags          = UPF_BOOT_AUTOCONF,
123         .scscr          = SCSCR_RE | SCSCR_TE,
124         .scbrr_algo_id  = SCBRR_ALGO_4,
125         .type           = PORT_SCIFA,
126         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0c60)),
127 };
128
129 static struct platform_device scif3_device = {
130         .name           = "sh-sci",
131         .id             = 3,
132         .dev            = {
133                 .platform_data  = &scif3_platform_data,
134         },
135 };
136
137 /* SCIFA4 */
138 static struct plat_sci_port scif4_platform_data = {
139         .mapbase        = 0xe6c80000,
140         .flags          = UPF_BOOT_AUTOCONF,
141         .scscr          = SCSCR_RE | SCSCR_TE,
142         .scbrr_algo_id  = SCBRR_ALGO_4,
143         .type           = PORT_SCIFA,
144         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d20)),
145 };
146
147 static struct platform_device scif4_device = {
148         .name           = "sh-sci",
149         .id             = 4,
150         .dev            = {
151                 .platform_data  = &scif4_platform_data,
152         },
153 };
154
155 /* SCIFA5 */
156 static struct plat_sci_port scif5_platform_data = {
157         .mapbase        = 0xe6cb0000,
158         .flags          = UPF_BOOT_AUTOCONF,
159         .scscr          = SCSCR_RE | SCSCR_TE,
160         .scbrr_algo_id  = SCBRR_ALGO_4,
161         .type           = PORT_SCIFA,
162         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d40)),
163 };
164
165 static struct platform_device scif5_device = {
166         .name           = "sh-sci",
167         .id             = 5,
168         .dev            = {
169                 .platform_data  = &scif5_platform_data,
170         },
171 };
172
173 /* SCIFA6 */
174 static struct plat_sci_port scif6_platform_data = {
175         .mapbase        = 0xe6cc0000,
176         .flags          = UPF_BOOT_AUTOCONF,
177         .scscr          = SCSCR_RE | SCSCR_TE,
178         .scbrr_algo_id  = SCBRR_ALGO_4,
179         .type           = PORT_SCIFA,
180         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x04c0)),
181 };
182
183 static struct platform_device scif6_device = {
184         .name           = "sh-sci",
185         .id             = 6,
186         .dev            = {
187                 .platform_data  = &scif6_platform_data,
188         },
189 };
190
191 /* SCIFA7 */
192 static struct plat_sci_port scif7_platform_data = {
193         .mapbase        = 0xe6cd0000,
194         .flags          = UPF_BOOT_AUTOCONF,
195         .scscr          = SCSCR_RE | SCSCR_TE,
196         .scbrr_algo_id  = SCBRR_ALGO_4,
197         .type           = PORT_SCIFA,
198         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x04e0)),
199 };
200
201 static struct platform_device scif7_device = {
202         .name           = "sh-sci",
203         .id             = 7,
204         .dev            = {
205                 .platform_data  = &scif7_platform_data,
206         },
207 };
208
209 /* SCIFB */
210 static struct plat_sci_port scifb_platform_data = {
211         .mapbase        = 0xe6c30000,
212         .flags          = UPF_BOOT_AUTOCONF,
213         .scscr          = SCSCR_RE | SCSCR_TE,
214         .scbrr_algo_id  = SCBRR_ALGO_4,
215         .type           = PORT_SCIFB,
216         .irqs           = SCIx_IRQ_MUXED(evt2irq(0x0d60)),
217 };
218
219 static struct platform_device scifb_device = {
220         .name           = "sh-sci",
221         .id             = 8,
222         .dev            = {
223                 .platform_data  = &scifb_platform_data,
224         },
225 };
226
227 /* CMT */
228 static struct sh_timer_config cmt10_platform_data = {
229         .name = "CMT10",
230         .channel_offset = 0x10,
231         .timer_bit = 0,
232         .clockevent_rating = 125,
233         .clocksource_rating = 125,
234 };
235
236 static struct resource cmt10_resources[] = {
237         [0] = {
238                 .name   = "CMT10",
239                 .start  = 0xe6138010,
240                 .end    = 0xe613801b,
241                 .flags  = IORESOURCE_MEM,
242         },
243         [1] = {
244                 .start  = evt2irq(0x0b00),
245                 .flags  = IORESOURCE_IRQ,
246         },
247 };
248
249 static struct platform_device cmt10_device = {
250         .name           = "sh_cmt",
251         .id             = 10,
252         .dev = {
253                 .platform_data  = &cmt10_platform_data,
254         },
255         .resource       = cmt10_resources,
256         .num_resources  = ARRAY_SIZE(cmt10_resources),
257 };
258
259 static struct platform_device *r8a7740_early_devices[] __initdata = {
260         &scif0_device,
261         &scif1_device,
262         &scif2_device,
263         &scif3_device,
264         &scif4_device,
265         &scif5_device,
266         &scif6_device,
267         &scif7_device,
268         &scifb_device,
269         &cmt10_device,
270 };
271
272 /* I2C */
273 static struct resource i2c0_resources[] = {
274         [0] = {
275                 .name   = "IIC0",
276                 .start  = 0xfff20000,
277                 .end    = 0xfff20425 - 1,
278                 .flags  = IORESOURCE_MEM,
279         },
280         [1] = {
281                 .start  = intcs_evt2irq(0xe00),
282                 .end    = intcs_evt2irq(0xe60),
283                 .flags  = IORESOURCE_IRQ,
284         },
285 };
286
287 static struct resource i2c1_resources[] = {
288         [0] = {
289                 .name   = "IIC1",
290                 .start  = 0xe6c20000,
291                 .end    = 0xe6c20425 - 1,
292                 .flags  = IORESOURCE_MEM,
293         },
294         [1] = {
295                 .start  = evt2irq(0x780), /* IIC1_ALI1 */
296                 .end    = evt2irq(0x7e0), /* IIC1_DTEI1 */
297                 .flags  = IORESOURCE_IRQ,
298         },
299 };
300
301 static struct platform_device i2c0_device = {
302         .name           = "i2c-sh_mobile",
303         .id             = 0,
304         .resource       = i2c0_resources,
305         .num_resources  = ARRAY_SIZE(i2c0_resources),
306 };
307
308 static struct platform_device i2c1_device = {
309         .name           = "i2c-sh_mobile",
310         .id             = 1,
311         .resource       = i2c1_resources,
312         .num_resources  = ARRAY_SIZE(i2c1_resources),
313 };
314
315 static struct platform_device *r8a7740_late_devices[] __initdata = {
316         &i2c0_device,
317         &i2c1_device,
318 };
319
320 #define ICCR    0x0004
321 #define ICSTART 0x0070
322
323 #define i2c_read(reg, offset)           ioread8(reg + offset)
324 #define i2c_write(reg, offset, data)    iowrite8(data, reg + offset)
325
326 /*
327  * r8a7740 chip has lasting errata on I2C I/O pad reset.
328  * this is work-around for it.
329  */
330 static void r8a7740_i2c_workaround(struct platform_device *pdev)
331 {
332         struct resource *res;
333         void __iomem *reg;
334
335         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
336         if (unlikely(!res)) {
337                 pr_err("r8a7740 i2c workaround fail (cannot find resource)\n");
338                 return;
339         }
340
341         reg = ioremap(res->start, resource_size(res));
342         if (unlikely(!reg)) {
343                 pr_err("r8a7740 i2c workaround fail (cannot map IO)\n");
344                 return;
345         }
346
347         i2c_write(reg, ICCR, i2c_read(reg, ICCR) | 0x80);
348         i2c_read(reg, ICCR); /* dummy read */
349
350         i2c_write(reg, ICSTART, i2c_read(reg, ICSTART) | 0x10);
351         i2c_read(reg, ICSTART); /* dummy read */
352
353         mdelay(100);
354
355         i2c_write(reg, ICCR, 0x01);
356         i2c_read(reg, ICCR);
357         i2c_write(reg, ICSTART, 0x00);
358         i2c_read(reg, ICSTART);
359
360         i2c_write(reg, ICCR, 0x10);
361         mdelay(100);
362         i2c_write(reg, ICCR, 0x00);
363         mdelay(100);
364         i2c_write(reg, ICCR, 0x10);
365         mdelay(100);
366
367         iounmap(reg);
368 }
369
370 void __init r8a7740_add_standard_devices(void)
371 {
372         /* I2C work-around */
373         r8a7740_i2c_workaround(&i2c0_device);
374         r8a7740_i2c_workaround(&i2c1_device);
375
376         platform_add_devices(r8a7740_early_devices,
377                             ARRAY_SIZE(r8a7740_early_devices));
378         platform_add_devices(r8a7740_late_devices,
379                              ARRAY_SIZE(r8a7740_late_devices));
380 }
381
382 static void __init r8a7740_earlytimer_init(void)
383 {
384         r8a7740_clock_init(0);
385         shmobile_earlytimer_init();
386 }
387
388 void __init r8a7740_add_early_devices(void)
389 {
390         early_platform_add_devices(r8a7740_early_devices,
391                                    ARRAY_SIZE(r8a7740_early_devices));
392
393         /* setup early console here as well */
394         shmobile_setup_console();
395
396         /* override timer setup with soc-specific code */
397         shmobile_timer.init = r8a7740_earlytimer_init;
398 }