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