Initial file dump from open source releaseHEADmaster

1 files changed, 358 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
new file mode 100644
index 00000000..ab99ab8f
--- /dev/null
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -0,0 +1,358 @@
+/*
+ * OMAP4 specific common source file.
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Author:
+ *	Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ *
+ * This program is free software,you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/platform_device.h>
+#include <linux/memblock.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/export.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/of_address.h>
+
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/map.h>
+#include <asm/memblock.h>
+#include <asm/smp_twd.h>
+
+#include "omap-wakeupgen.h"
+#include "soc.h"
+#include "iomap.h"
+#include "common.h"
+#include "mmc.h"
+#include "hsmmc.h"
+#include "prminst44xx.h"
+#include "prcm_mpu44xx.h"
+#include "omap4-sar-layout.h"
+#include "omap-secure.h"
+#include "sram.h"
+
+#ifdef CONFIG_CACHE_L2X0
+static void __iomem *l2cache_base;
+#endif
+
+static void __iomem *sar_ram_base;
+static void __iomem *gic_dist_base_addr;
+static void __iomem *twd_base;
+
+#define IRQ_LOCALTIMER		29
+
+#ifdef CONFIG_OMAP4_ERRATA_I688
+/* Used to implement memory barrier on DRAM path */
+#define OMAP4_DRAM_BARRIER_VA			0xfe600000
+
+void __iomem *dram_sync, *sram_sync;
+
+static phys_addr_t paddr;
+static u32 size;
+
+void omap_bus_sync(void)
+{
+	if (dram_sync && sram_sync) {
+		writel_relaxed(readl_relaxed(dram_sync), dram_sync);
+		writel_relaxed(readl_relaxed(sram_sync), sram_sync);
+		isb();
+	}
+}
+EXPORT_SYMBOL(omap_bus_sync);
+
+/* Steal one page physical memory for barrier implementation */
+int __init omap_barrier_reserve_memblock(void)
+{
+
+	size = ALIGN(PAGE_SIZE, SZ_1M);
+	paddr = arm_memblock_steal(size, SZ_1M);
+
+	return 0;
+}
+
+void __init omap_barriers_init(void)
+{
+	struct map_desc dram_io_desc[1];
+
+	dram_io_desc[0].virtual = OMAP4_DRAM_BARRIER_VA;
+	dram_io_desc[0].pfn = __phys_to_pfn(paddr);
+	dram_io_desc[0].length = size;
+	dram_io_desc[0].type = MT_MEMORY_SO;
+	iotable_init(dram_io_desc, ARRAY_SIZE(dram_io_desc));
+	dram_sync = (void __iomem *) dram_io_desc[0].virtual;
+	sram_sync = (void __iomem *) OMAP4_SRAM_VA;
+
+	pr_info("OMAP4: Map 0x%08llx to 0x%08lx for dram barrier\n",
+		(long long) paddr, dram_io_desc[0].virtual);
+
+}
+#else
+void __init omap_barriers_init(void)
+{}
+#endif
+
+void __init gic_init_irq(void)
+{
+	void __iomem *omap_irq_base;
+
+	/* Static mapping, never released */
+	gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
+	BUG_ON(!gic_dist_base_addr);
+
+	twd_base = ioremap(OMAP44XX_LOCAL_TWD_BASE, SZ_4K);
+	BUG_ON(!twd_base);
+
+	/* Static mapping, never released */
+	omap_irq_base = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
+	BUG_ON(!omap_irq_base);
+
+	omap_wakeupgen_init();
+
+	gic_init(0, 29, gic_dist_base_addr, omap_irq_base);
+}
+
+void gic_dist_disable(void)
+{
+	if (gic_dist_base_addr)
+		__raw_writel(0x0, gic_dist_base_addr + GIC_DIST_CTRL);
+}
+
+bool gic_dist_disabled(void)
+{
+	return !(__raw_readl(gic_dist_base_addr + GIC_DIST_CTRL) & 0x1);
+}
+
+void gic_timer_retrigger(void)
+{
+	u32 twd_int = __raw_readl(twd_base + TWD_TIMER_INTSTAT);
+	u32 gic_int = __raw_readl(gic_dist_base_addr + GIC_DIST_PENDING_SET);
+	u32 twd_ctrl = __raw_readl(twd_base + TWD_TIMER_CONTROL);
+
+	if (twd_int && !(gic_int & BIT(IRQ_LOCALTIMER))) {
+		/*
+		 * The local timer interrupt got lost while the distributor was
+		 * disabled.  Ack the pending interrupt, and retrigger it.
+		 */
+		pr_warn("%s: lost localtimer interrupt\n", __func__);
+		__raw_writel(1, twd_base + TWD_TIMER_INTSTAT);
+		if (!(twd_ctrl & TWD_TIMER_CONTROL_PERIODIC)) {
+			__raw_writel(1, twd_base + TWD_TIMER_COUNTER);
+			twd_ctrl |= TWD_TIMER_CONTROL_ENABLE;
+			__raw_writel(twd_ctrl, twd_base + TWD_TIMER_CONTROL);
+		}
+	}
+}
+
+#ifdef CONFIG_CACHE_L2X0
+
+void __iomem *omap4_get_l2cache_base(void)
+{
+	return l2cache_base;
+}
+
+static void omap4_l2x0_disable(void)
+{
+	outer_flush_all();
+	/* Disable PL310 L2 Cache controller */
+	omap_smc1(0x102, 0x0);
+}
+
+static void omap4_l2x0_set_debug(unsigned long val)
+{
+	/* Program PL310 L2 Cache controller debug register */
+	omap_smc1(0x100, val);
+}
+
+static int __init omap_l2_cache_init(void)
+{
+	u32 aux_ctrl = 0;
+
+	/*
+	 * To avoid code running on other OMAPs in
+	 * multi-omap builds
+	 */
+	if (!cpu_is_omap44xx())
+		return -ENODEV;
+
+	/* Static mapping, never released */
+	l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
+	if (WARN_ON(!l2cache_base))
+		return -ENOMEM;
+
+	/*
+	 * 16-way associativity, parity disabled
+	 * Way size - 32KB (es1.0)
+	 * Way size - 64KB (es2.0 +)
+	 */
+	aux_ctrl = ((1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT) |
+			(0x1 << 25) |
+			(0x1 << L2X0_AUX_CTRL_NS_LOCKDOWN_SHIFT) |
+			(0x1 << L2X0_AUX_CTRL_NS_INT_CTRL_SHIFT));
+
+	if (omap_rev() == OMAP4430_REV_ES1_0) {
+		aux_ctrl |= 0x2 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT;
+	} else {
+		aux_ctrl |= ((0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT) |
+			(1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) |
+			(1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) |
+			(1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) |
+			(1 << L2X0_AUX_CTRL_EARLY_BRESP_SHIFT));
+	}
+	if (omap_rev() != OMAP4430_REV_ES1_0)
+		omap_smc1(0x109, aux_ctrl);
+
+	/* Enable PL310 L2 Cache controller */
+	omap_smc1(0x102, 0x1);
+
+	if (of_have_populated_dt())
+		l2x0_of_init(aux_ctrl, L2X0_AUX_CTRL_MASK);
+	else
+		l2x0_init(l2cache_base, aux_ctrl, L2X0_AUX_CTRL_MASK);
+
+	/*
+	 * Override default outer_cache.disable with a OMAP4
+	 * specific one
+	*/
+	outer_cache.disable = omap4_l2x0_disable;
+	outer_cache.set_debug = omap4_l2x0_set_debug;
+
+	return 0;
+}
+omap_early_initcall(omap_l2_cache_init);
+#endif
+
+void __iomem *omap4_get_sar_ram_base(void)
+{
+	return sar_ram_base;
+}
+
+/*
+ * SAR RAM used to save and restore the HW
+ * context in low power modes
+ */
+static int __init omap4_sar_ram_init(void)
+{
+	unsigned long sar_base;
+
+	/*
+	 * To avoid code running on other OMAPs in
+	 * multi-omap builds
+	 */
+	if (cpu_is_omap44xx())
+		sar_base = OMAP44XX_SAR_RAM_BASE;
+	else if (soc_is_omap54xx())
+		sar_base = OMAP54XX_SAR_RAM_BASE;
+	else
+		return -ENOMEM;
+
+	/* Static mapping, never released */
+	sar_ram_base = ioremap(sar_base, SZ_16K);
+	if (WARN_ON(!sar_ram_base))
+		return -ENOMEM;
+
+	return 0;
+}
+omap_early_initcall(omap4_sar_ram_init);
+
+void __init omap_gic_of_init(void)
+{
+	struct device_node *np;
+
+	/* Extract GIC distributor and TWD bases for OMAP4460 ROM Errata WA */
+	if (!cpu_is_omap446x())
+		goto skip_errata_init;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
+	gic_dist_base_addr = of_iomap(np, 0);
+	WARN_ON(!gic_dist_base_addr);
+
+	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-twd-timer");
+	twd_base = of_iomap(np, 0);
+	WARN_ON(!twd_base);
+
+skip_errata_init:
+	omap_wakeupgen_init();
+	irqchip_init();
+}
+
+#if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
+static int omap4_twl6030_hsmmc_late_init(struct device *dev)
+{
+	int irq = 0;
+	struct platform_device *pdev = container_of(dev,
+				struct platform_device, dev);
+	struct omap_mmc_platform_data *pdata = dev->platform_data;
+
+	/* Setting MMC1 Card detect Irq */
+	if (pdev->id == 0) {
+		irq = twl6030_mmc_card_detect_config();
+		if (irq < 0) {
+			dev_err(dev, "%s: Error card detect config(%d)\n",
+				__func__, irq);
+			return irq;
+		}
+		pdata->slots[0].card_detect_irq = irq;
+		pdata->slots[0].card_detect = twl6030_mmc_card_detect;
+	}
+	return 0;
+}
+
+static __init void omap4_twl6030_hsmmc_set_late_init(struct device *dev)
+{
+	struct omap_mmc_platform_data *pdata;
+
+	/* dev can be null if CONFIG_MMC_OMAP_HS is not set */
+	if (!dev) {
+		pr_err("Failed %s\n", __func__);
+		return;
+	}
+	pdata = dev->platform_data;
+	pdata->init =	omap4_twl6030_hsmmc_late_init;
+}
+
+int __init omap4_twl6030_hsmmc_init(struct omap2_hsmmc_info *controllers)
+{
+	struct omap2_hsmmc_info *c;
+
+	omap_hsmmc_init(controllers);
+	for (c = controllers; c->mmc; c++) {
+		/* pdev can be null if CONFIG_MMC_OMAP_HS is not set */
+		if (!c->pdev)
+			continue;
+		omap4_twl6030_hsmmc_set_late_init(&c->pdev->dev);
+	}
+
+	return 0;
+}
+#else
+int __init omap4_twl6030_hsmmc_init(struct omap2_hsmmc_info *controllers)
+{
+	return 0;
+}
+#endif
+
+/**
+ * omap44xx_restart - trigger a software restart of the SoC
+ * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
+ * @cmd: passed from the userspace program rebooting the system (if provided)
+ *
+ * Resets the SoC.  For @cmd, see the 'reboot' syscall in
+ * kernel/sys.c.  No return value.
+ */
+void omap44xx_restart(char mode, const char *cmd)
+{
+	/* XXX Should save 'cmd' into scratchpad for use after reboot */
+	omap4_prminst_global_warm_sw_reset(); /* never returns */
+	while (1);
+}
+