Merge branch 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / arch / arm / mach-omap2 / omap4-common.c
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fbc9be10
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1/*
2 * OMAP4 specific common source file.
3 *
4 * Copyright (C) 2010 Texas Instruments, Inc.
5 * Author:
6 * Santosh Shilimkar <santosh.shilimkar@ti.com>
7 *
8 *
9 * This program is free software,you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/kernel.h>
15#include <linux/init.h>
16#include <linux/io.h>
cd8ce159 17#include <linux/irq.h>
0529e315 18#include <linux/irqchip.h>
fbc9be10 19#include <linux/platform_device.h>
137d105d 20#include <linux/memblock.h>
7d7e1eba
TL
21#include <linux/of_irq.h>
22#include <linux/of_platform.h>
23#include <linux/export.h>
520f7bd7 24#include <linux/irqchip/arm-gic.h>
fd1c0786 25#include <linux/of_address.h>
7b6d864b 26#include <linux/reboot.h>
fbc9be10 27
fbc9be10 28#include <asm/hardware/cache-l2x0.h>
137d105d 29#include <asm/mach/map.h>
716a3dc2 30#include <asm/memblock.h>
cd8ce159 31#include <asm/smp_twd.h>
fbc9be10 32
732231a7 33#include "omap-wakeupgen.h"
dbc04161 34#include "soc.h"
b6a4226c 35#include "iomap.h"
4e65331c 36#include "common.h"
68f39e74 37#include "mmc.h"
1ee47b0a 38#include "hsmmc.h"
2f334a38 39#include "prminst44xx.h"
d9a16f9a 40#include "prcm_mpu44xx.h"
501f0c75 41#include "omap4-sar-layout.h"
f7a9b8a1 42#include "omap-secure.h"
bb772094 43#include "sram.h"
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44
45#ifdef CONFIG_CACHE_L2X0
02afe8a7 46static void __iomem *l2cache_base;
fbc9be10
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47#endif
48
501f0c75 49static void __iomem *sar_ram_base;
ff999b8a 50static void __iomem *gic_dist_base_addr;
cd8ce159
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51static void __iomem *twd_base;
52
53#define IRQ_LOCALTIMER 29
501f0c75 54
137d105d
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55#ifdef CONFIG_OMAP4_ERRATA_I688
56/* Used to implement memory barrier on DRAM path */
57#define OMAP4_DRAM_BARRIER_VA 0xfe600000
58
59void __iomem *dram_sync, *sram_sync;
60
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61static phys_addr_t paddr;
62static u32 size;
63
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64void omap_bus_sync(void)
65{
66 if (dram_sync && sram_sync) {
67 writel_relaxed(readl_relaxed(dram_sync), dram_sync);
68 writel_relaxed(readl_relaxed(sram_sync), sram_sync);
69 isb();
70 }
71}
cc4ad907 72EXPORT_SYMBOL(omap_bus_sync);
137d105d 73
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74/* Steal one page physical memory for barrier implementation */
75int __init omap_barrier_reserve_memblock(void)
137d105d 76{
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77
78 size = ALIGN(PAGE_SIZE, SZ_1M);
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79 paddr = arm_memblock_steal(size, SZ_1M);
80
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81 return 0;
82}
83
84void __init omap_barriers_init(void)
85{
86 struct map_desc dram_io_desc[1];
87
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88 dram_io_desc[0].virtual = OMAP4_DRAM_BARRIER_VA;
89 dram_io_desc[0].pfn = __phys_to_pfn(paddr);
90 dram_io_desc[0].length = size;
91 dram_io_desc[0].type = MT_MEMORY_SO;
92 iotable_init(dram_io_desc, ARRAY_SIZE(dram_io_desc));
93 dram_sync = (void __iomem *) dram_io_desc[0].virtual;
94 sram_sync = (void __iomem *) OMAP4_SRAM_VA;
95
96 pr_info("OMAP4: Map 0x%08llx to 0x%08lx for dram barrier\n",
97 (long long) paddr, dram_io_desc[0].virtual);
98
137d105d 99}
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100#else
101void __init omap_barriers_init(void)
102{}
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103#endif
104
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105void __init gic_init_irq(void)
106{
ab65be26 107 void __iomem *omap_irq_base;
ab65be26 108
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109 /* Static mapping, never released */
110 gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
111 BUG_ON(!gic_dist_base_addr);
fbc9be10 112
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113 twd_base = ioremap(OMAP44XX_LOCAL_TWD_BASE, SZ_4K);
114 BUG_ON(!twd_base);
115
fbc9be10 116 /* Static mapping, never released */
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117 omap_irq_base = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
118 BUG_ON(!omap_irq_base);
b580b899 119
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120 omap_wakeupgen_init();
121
741e3a89 122 gic_init(0, 29, gic_dist_base_addr, omap_irq_base);
fbc9be10
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123}
124
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125void gic_dist_disable(void)
126{
127 if (gic_dist_base_addr)
128 __raw_writel(0x0, gic_dist_base_addr + GIC_DIST_CTRL);
129}
130
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CC
131bool gic_dist_disabled(void)
132{
133 return !(__raw_readl(gic_dist_base_addr + GIC_DIST_CTRL) & 0x1);
134}
135
136void gic_timer_retrigger(void)
137{
138 u32 twd_int = __raw_readl(twd_base + TWD_TIMER_INTSTAT);
139 u32 gic_int = __raw_readl(gic_dist_base_addr + GIC_DIST_PENDING_SET);
140 u32 twd_ctrl = __raw_readl(twd_base + TWD_TIMER_CONTROL);
141
142 if (twd_int && !(gic_int & BIT(IRQ_LOCALTIMER))) {
143 /*
144 * The local timer interrupt got lost while the distributor was
145 * disabled. Ack the pending interrupt, and retrigger it.
146 */
147 pr_warn("%s: lost localtimer interrupt\n", __func__);
148 __raw_writel(1, twd_base + TWD_TIMER_INTSTAT);
149 if (!(twd_ctrl & TWD_TIMER_CONTROL_PERIODIC)) {
150 __raw_writel(1, twd_base + TWD_TIMER_COUNTER);
151 twd_ctrl |= TWD_TIMER_CONTROL_ENABLE;
152 __raw_writel(twd_ctrl, twd_base + TWD_TIMER_CONTROL);
153 }
154 }
155}
156
fbc9be10 157#ifdef CONFIG_CACHE_L2X0
4e803c40 158
02afe8a7
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159void __iomem *omap4_get_l2cache_base(void)
160{
161 return l2cache_base;
162}
163
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164static void omap4_l2x0_disable(void)
165{
166 /* Disable PL310 L2 Cache controller */
167 omap_smc1(0x102, 0x0);
168}
169
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170static void omap4_l2x0_set_debug(unsigned long val)
171{
172 /* Program PL310 L2 Cache controller debug register */
173 omap_smc1(0x100, val);
174}
175
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176static int __init omap_l2_cache_init(void)
177{
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178 u32 aux_ctrl = 0;
179
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180 /*
181 * To avoid code running on other OMAPs in
182 * multi-omap builds
183 */
184 if (!cpu_is_omap44xx())
185 return -ENODEV;
186
187 /* Static mapping, never released */
188 l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
0db1803e
SS
189 if (WARN_ON(!l2cache_base))
190 return -ENOMEM;
fbc9be10 191
fbc9be10 192 /*
a777b727
SS
193 * 16-way associativity, parity disabled
194 * Way size - 32KB (es1.0)
195 * Way size - 64KB (es2.0 +)
fbc9be10 196 */
1773e60a
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197 aux_ctrl = ((1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT) |
198 (0x1 << 25) |
199 (0x1 << L2X0_AUX_CTRL_NS_LOCKDOWN_SHIFT) |
200 (0x1 << L2X0_AUX_CTRL_NS_INT_CTRL_SHIFT));
201
11e02640 202 if (omap_rev() == OMAP4430_REV_ES1_0) {
1773e60a 203 aux_ctrl |= 0x2 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT;
11e02640
MR
204 } else {
205 aux_ctrl |= ((0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT) |
b0f20ff9 206 (1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) |
11e02640 207 (1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) |
b89cd71a
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208 (1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) |
209 (1 << L2X0_AUX_CTRL_EARLY_BRESP_SHIFT));
11e02640
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210 }
211 if (omap_rev() != OMAP4430_REV_ES1_0)
212 omap_smc1(0x109, aux_ctrl);
213
214 /* Enable PL310 L2 Cache controller */
215 omap_smc1(0x102, 0x1);
1773e60a 216
926fd45b
SS
217 if (of_have_populated_dt())
218 l2x0_of_init(aux_ctrl, L2X0_AUX_CTRL_MASK);
219 else
220 l2x0_init(l2cache_base, aux_ctrl, L2X0_AUX_CTRL_MASK);
fbc9be10 221
4e803c40
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222 /*
223 * Override default outer_cache.disable with a OMAP4
224 * specific one
225 */
226 outer_cache.disable = omap4_l2x0_disable;
4bdb1577 227 outer_cache.set_debug = omap4_l2x0_set_debug;
4e803c40 228
fbc9be10
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229 return 0;
230}
b76c8b19 231omap_early_initcall(omap_l2_cache_init);
fbc9be10 232#endif
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233
234void __iomem *omap4_get_sar_ram_base(void)
235{
236 return sar_ram_base;
237}
238
239/*
240 * SAR RAM used to save and restore the HW
241 * context in low power modes
242 */
243static int __init omap4_sar_ram_init(void)
244{
da0e02a1
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245 unsigned long sar_base;
246
501f0c75
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247 /*
248 * To avoid code running on other OMAPs in
249 * multi-omap builds
250 */
da0e02a1
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251 if (cpu_is_omap44xx())
252 sar_base = OMAP44XX_SAR_RAM_BASE;
253 else if (soc_is_omap54xx())
254 sar_base = OMAP54XX_SAR_RAM_BASE;
255 else
501f0c75
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256 return -ENOMEM;
257
258 /* Static mapping, never released */
da0e02a1 259 sar_ram_base = ioremap(sar_base, SZ_16K);
501f0c75
SS
260 if (WARN_ON(!sar_ram_base))
261 return -ENOMEM;
262
263 return 0;
264}
b76c8b19 265omap_early_initcall(omap4_sar_ram_init);
1ee47b0a 266
c4082d49
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267void __init omap_gic_of_init(void)
268{
fd1c0786
SS
269 struct device_node *np;
270
271 /* Extract GIC distributor and TWD bases for OMAP4460 ROM Errata WA */
272 if (!cpu_is_omap446x())
273 goto skip_errata_init;
274
275 np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
276 gic_dist_base_addr = of_iomap(np, 0);
277 WARN_ON(!gic_dist_base_addr);
278
279 np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-twd-timer");
280 twd_base = of_iomap(np, 0);
281 WARN_ON(!twd_base);
282
283skip_errata_init:
c4082d49 284 omap_wakeupgen_init();
0529e315 285 irqchip_init();
c4082d49
S
286}
287
1ee47b0a
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288#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
289static int omap4_twl6030_hsmmc_late_init(struct device *dev)
290{
291 int irq = 0;
292 struct platform_device *pdev = container_of(dev,
293 struct platform_device, dev);
294 struct omap_mmc_platform_data *pdata = dev->platform_data;
295
296 /* Setting MMC1 Card detect Irq */
297 if (pdev->id == 0) {
298 irq = twl6030_mmc_card_detect_config();
299 if (irq < 0) {
300 dev_err(dev, "%s: Error card detect config(%d)\n",
301 __func__, irq);
302 return irq;
303 }
304 pdata->slots[0].card_detect_irq = irq;
305 pdata->slots[0].card_detect = twl6030_mmc_card_detect;
306 }
307 return 0;
308}
309
310static __init void omap4_twl6030_hsmmc_set_late_init(struct device *dev)
311{
312 struct omap_mmc_platform_data *pdata;
313
314 /* dev can be null if CONFIG_MMC_OMAP_HS is not set */
315 if (!dev) {
316 pr_err("Failed %s\n", __func__);
317 return;
318 }
319 pdata = dev->platform_data;
320 pdata->init = omap4_twl6030_hsmmc_late_init;
321}
322
323int __init omap4_twl6030_hsmmc_init(struct omap2_hsmmc_info *controllers)
324{
325 struct omap2_hsmmc_info *c;
326
327 omap_hsmmc_init(controllers);
328 for (c = controllers; c->mmc; c++) {
329 /* pdev can be null if CONFIG_MMC_OMAP_HS is not set */
330 if (!c->pdev)
331 continue;
332 omap4_twl6030_hsmmc_set_late_init(&c->pdev->dev);
333 }
334
335 return 0;
336}
337#else
338int __init omap4_twl6030_hsmmc_init(struct omap2_hsmmc_info *controllers)
339{
340 return 0;
341}
342#endif
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