OMAP2/3 PM: create the OMAP PM interface and add a default OMAP PM no-op layer
[linux-3.10.git] / arch / arm / mach-omap2 / io.c
1 /*
2  * linux/arch/arm/mach-omap2/io.c
3  *
4  * OMAP2 I/O mapping code
5  *
6  * Copyright (C) 2005 Nokia Corporation
7  * Copyright (C) 2007-2009 Texas Instruments
8  *
9  * Author:
10  *      Juha Yrjola <juha.yrjola@nokia.com>
11  *      Syed Khasim <x0khasim@ti.com>
12  *
13  * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
14  *
15  * This program is free software; you can redistribute it and/or modify
16  * it under the terms of the GNU General Public License version 2 as
17  * published by the Free Software Foundation.
18  */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/io.h>
24 #include <linux/clk.h>
25
26 #include <asm/tlb.h>
27
28 #include <asm/mach/map.h>
29
30 #include <mach/mux.h>
31 #include <mach/omapfb.h>
32 #include <mach/sram.h>
33 #include <mach/sdrc.h>
34 #include <mach/gpmc.h>
35
36 #ifndef CONFIG_ARCH_OMAP4       /* FIXME: Remove this once clkdev is ready */
37 #include "clock.h"
38
39 #include <mach/omap-pm.h>
40 #include <mach/powerdomain.h>
41
42 #include "powerdomains.h"
43
44 #include <mach/clockdomain.h>
45 #include "clockdomains.h"
46 #endif
47 /*
48  * The machine specific code may provide the extra mapping besides the
49  * default mapping provided here.
50  */
51
52 #ifdef CONFIG_ARCH_OMAP24XX
53 static struct map_desc omap24xx_io_desc[] __initdata = {
54         {
55                 .virtual        = L3_24XX_VIRT,
56                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
57                 .length         = L3_24XX_SIZE,
58                 .type           = MT_DEVICE
59         },
60         {
61                 .virtual        = L4_24XX_VIRT,
62                 .pfn            = __phys_to_pfn(L4_24XX_PHYS),
63                 .length         = L4_24XX_SIZE,
64                 .type           = MT_DEVICE
65         },
66 };
67
68 #ifdef CONFIG_ARCH_OMAP2420
69 static struct map_desc omap242x_io_desc[] __initdata = {
70         {
71                 .virtual        = DSP_MEM_24XX_VIRT,
72                 .pfn            = __phys_to_pfn(DSP_MEM_24XX_PHYS),
73                 .length         = DSP_MEM_24XX_SIZE,
74                 .type           = MT_DEVICE
75         },
76         {
77                 .virtual        = DSP_IPI_24XX_VIRT,
78                 .pfn            = __phys_to_pfn(DSP_IPI_24XX_PHYS),
79                 .length         = DSP_IPI_24XX_SIZE,
80                 .type           = MT_DEVICE
81         },
82         {
83                 .virtual        = DSP_MMU_24XX_VIRT,
84                 .pfn            = __phys_to_pfn(DSP_MMU_24XX_PHYS),
85                 .length         = DSP_MMU_24XX_SIZE,
86                 .type           = MT_DEVICE
87         },
88 };
89
90 #endif
91
92 #ifdef CONFIG_ARCH_OMAP2430
93 static struct map_desc omap243x_io_desc[] __initdata = {
94         {
95                 .virtual        = L4_WK_243X_VIRT,
96                 .pfn            = __phys_to_pfn(L4_WK_243X_PHYS),
97                 .length         = L4_WK_243X_SIZE,
98                 .type           = MT_DEVICE
99         },
100         {
101                 .virtual        = OMAP243X_GPMC_VIRT,
102                 .pfn            = __phys_to_pfn(OMAP243X_GPMC_PHYS),
103                 .length         = OMAP243X_GPMC_SIZE,
104                 .type           = MT_DEVICE
105         },
106         {
107                 .virtual        = OMAP243X_SDRC_VIRT,
108                 .pfn            = __phys_to_pfn(OMAP243X_SDRC_PHYS),
109                 .length         = OMAP243X_SDRC_SIZE,
110                 .type           = MT_DEVICE
111         },
112         {
113                 .virtual        = OMAP243X_SMS_VIRT,
114                 .pfn            = __phys_to_pfn(OMAP243X_SMS_PHYS),
115                 .length         = OMAP243X_SMS_SIZE,
116                 .type           = MT_DEVICE
117         },
118 };
119 #endif
120 #endif
121
122 #ifdef  CONFIG_ARCH_OMAP34XX
123 static struct map_desc omap34xx_io_desc[] __initdata = {
124         {
125                 .virtual        = L3_34XX_VIRT,
126                 .pfn            = __phys_to_pfn(L3_34XX_PHYS),
127                 .length         = L3_34XX_SIZE,
128                 .type           = MT_DEVICE
129         },
130         {
131                 .virtual        = L4_34XX_VIRT,
132                 .pfn            = __phys_to_pfn(L4_34XX_PHYS),
133                 .length         = L4_34XX_SIZE,
134                 .type           = MT_DEVICE
135         },
136         {
137                 .virtual        = L4_WK_34XX_VIRT,
138                 .pfn            = __phys_to_pfn(L4_WK_34XX_PHYS),
139                 .length         = L4_WK_34XX_SIZE,
140                 .type           = MT_DEVICE
141         },
142         {
143                 .virtual        = OMAP34XX_GPMC_VIRT,
144                 .pfn            = __phys_to_pfn(OMAP34XX_GPMC_PHYS),
145                 .length         = OMAP34XX_GPMC_SIZE,
146                 .type           = MT_DEVICE
147         },
148         {
149                 .virtual        = OMAP343X_SMS_VIRT,
150                 .pfn            = __phys_to_pfn(OMAP343X_SMS_PHYS),
151                 .length         = OMAP343X_SMS_SIZE,
152                 .type           = MT_DEVICE
153         },
154         {
155                 .virtual        = OMAP343X_SDRC_VIRT,
156                 .pfn            = __phys_to_pfn(OMAP343X_SDRC_PHYS),
157                 .length         = OMAP343X_SDRC_SIZE,
158                 .type           = MT_DEVICE
159         },
160         {
161                 .virtual        = L4_PER_34XX_VIRT,
162                 .pfn            = __phys_to_pfn(L4_PER_34XX_PHYS),
163                 .length         = L4_PER_34XX_SIZE,
164                 .type           = MT_DEVICE
165         },
166         {
167                 .virtual        = L4_EMU_34XX_VIRT,
168                 .pfn            = __phys_to_pfn(L4_EMU_34XX_PHYS),
169                 .length         = L4_EMU_34XX_SIZE,
170                 .type           = MT_DEVICE
171         },
172 };
173 #endif
174 #ifdef  CONFIG_ARCH_OMAP4
175 static struct map_desc omap44xx_io_desc[] __initdata = {
176         {
177                 .virtual        = L3_44XX_VIRT,
178                 .pfn            = __phys_to_pfn(L3_44XX_PHYS),
179                 .length         = L3_44XX_SIZE,
180                 .type           = MT_DEVICE,
181         },
182         {
183                 .virtual        = L4_44XX_VIRT,
184                 .pfn            = __phys_to_pfn(L4_44XX_PHYS),
185                 .length         = L4_44XX_SIZE,
186                 .type           = MT_DEVICE,
187         },
188         {
189                 .virtual        = L4_WK_44XX_VIRT,
190                 .pfn            = __phys_to_pfn(L4_WK_44XX_PHYS),
191                 .length         = L4_WK_44XX_SIZE,
192                 .type           = MT_DEVICE,
193         },
194         {
195                 .virtual        = OMAP44XX_GPMC_VIRT,
196                 .pfn            = __phys_to_pfn(OMAP44XX_GPMC_PHYS),
197                 .length         = OMAP44XX_GPMC_SIZE,
198                 .type           = MT_DEVICE,
199         },
200         {
201                 .virtual        = L4_PER_44XX_VIRT,
202                 .pfn            = __phys_to_pfn(L4_PER_44XX_PHYS),
203                 .length         = L4_PER_44XX_SIZE,
204                 .type           = MT_DEVICE,
205         },
206         {
207                 .virtual        = L4_EMU_44XX_VIRT,
208                 .pfn            = __phys_to_pfn(L4_EMU_44XX_PHYS),
209                 .length         = L4_EMU_44XX_SIZE,
210                 .type           = MT_DEVICE,
211         },
212 };
213 #endif
214
215 void __init omap2_map_common_io(void)
216 {
217 #if defined(CONFIG_ARCH_OMAP2420)
218         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
219         iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
220 #endif
221
222 #if defined(CONFIG_ARCH_OMAP2430)
223         iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
224         iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
225 #endif
226
227 #if defined(CONFIG_ARCH_OMAP34XX)
228         iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
229 #endif
230
231 #if defined(CONFIG_ARCH_OMAP4)
232         iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
233 #endif
234         /* Normally devicemaps_init() would flush caches and tlb after
235          * mdesc->map_io(), but we must also do it here because of the CPU
236          * revision check below.
237          */
238         local_flush_tlb_all();
239         flush_cache_all();
240
241         omap2_check_revision();
242         omap_sram_init();
243         omapfb_reserve_sdram();
244 }
245
246 /*
247  * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
248  *
249  * Sets the CORE DPLL3 M2 divider to the same value that it's at
250  * currently.  This has the effect of setting the SDRC SDRAM AC timing
251  * registers to the values currently defined by the kernel.  Currently
252  * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
253  * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
254  * or passes along the return value of clk_set_rate().
255  */
256 static int __init _omap2_init_reprogram_sdrc(void)
257 {
258         struct clk *dpll3_m2_ck;
259         int v = -EINVAL;
260         long rate;
261
262         if (!cpu_is_omap34xx())
263                 return 0;
264
265         dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
266         if (!dpll3_m2_ck)
267                 return -EINVAL;
268
269         rate = clk_get_rate(dpll3_m2_ck);
270         pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
271         v = clk_set_rate(dpll3_m2_ck, rate);
272         if (v)
273                 pr_err("dpll3_m2_clk rate change failed: %d\n", v);
274
275         clk_put(dpll3_m2_ck);
276
277         return v;
278 }
279
280 void __init omap2_init_common_hw(struct omap_sdrc_params *sdrc_cs0,
281                                  struct omap_sdrc_params *sdrc_cs1)
282 {
283         omap2_mux_init();
284 #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */
285         /* The OPP tables have to be registered before a clk init */
286         omap_pm_if_early_init(mpu_opps, dsp_opps, l3_opps);
287         pwrdm_init(powerdomains_omap);
288         clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps);
289         omap2_clk_init();
290         omap_pm_if_init();
291         omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
292         _omap2_init_reprogram_sdrc();
293 #endif
294         gpmc_init();
295 }