From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001
From: root <root@artemis.panaceas.org>
Date: Fri, 25 Dec 2015 04:40:36 +0000
Subject: initial_commit

---
 arch/arm/mach-davinci/common.c | 119 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 arch/arm/mach-davinci/common.c

(limited to 'arch/arm/mach-davinci/common.c')

diff --git a/arch/arm/mach-davinci/common.c b/arch/arm/mach-davinci/common.c
new file mode 100644
index 00000000..1d255739
--- /dev/null
+++ b/arch/arm/mach-davinci/common.c
@@ -0,0 +1,119 @@
+/*
+ * Code commons to all DaVinci SoCs.
+ *
+ * Author: Mark A. Greer <mgreer@mvista.com>
+ *
+ * 2009 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/etherdevice.h>
+#include <linux/davinci_emac.h>
+
+#include <asm/tlb.h>
+#include <asm/mach/map.h>
+
+#include <mach/common.h>
+#include <mach/cputype.h>
+
+#include "clock.h"
+
+struct davinci_soc_info davinci_soc_info;
+EXPORT_SYMBOL(davinci_soc_info);
+
+void __iomem *davinci_intc_base;
+int davinci_intc_type;
+
+void davinci_get_mac_addr(struct memory_accessor *mem_acc, void *context)
+{
+	char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
+	off_t offset = (off_t)context;
+
+	/* Read MAC addr from EEPROM */
+	if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN)
+		pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
+}
+
+static int __init davinci_init_id(struct davinci_soc_info *soc_info)
+{
+	int			i;
+	struct davinci_id	*dip;
+	u8			variant;
+	u16			part_no;
+	void __iomem		*base;
+
+	base = ioremap(soc_info->jtag_id_reg, SZ_4K);
+	if (!base) {
+		pr_err("Unable to map JTAG ID register\n");
+		return -ENOMEM;
+	}
+
+	soc_info->jtag_id = __raw_readl(base);
+	iounmap(base);
+
+	variant = (soc_info->jtag_id & 0xf0000000) >> 28;
+	part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
+
+	for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
+			i++, dip++)
+		/* Don't care about the manufacturer right now */
+		if ((dip->part_no == part_no) && (dip->variant == variant)) {
+			soc_info->cpu_id = dip->cpu_id;
+			pr_info("DaVinci %s variant 0x%x\n", dip->name,
+					dip->variant);
+			return 0;
+		}
+
+	pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
+	return -EINVAL;
+}
+
+void __init davinci_common_init(struct davinci_soc_info *soc_info)
+{
+	int ret;
+
+	if (!soc_info) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
+
+	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
+		iotable_init(davinci_soc_info.io_desc,
+				davinci_soc_info.io_desc_num);
+
+	/*
+	 * Normally devicemaps_init() would flush caches and tlb after
+	 * mdesc->map_io(), but we must also do it here because of the CPU
+	 * revision check below.
+	 */
+	local_flush_tlb_all();
+	flush_cache_all();
+
+	if (!davinci_soc_info.reset)
+		davinci_soc_info.reset = davinci_watchdog_reset;
+
+	/*
+	 * We want to check CPU revision early for cpu_is_xxxx() macros.
+	 * IO space mapping must be initialized before we can do that.
+	 */
+	ret = davinci_init_id(&davinci_soc_info);
+	if (ret < 0)
+		goto err;
+
+	if (davinci_soc_info.cpu_clks) {
+		ret = davinci_clk_init(davinci_soc_info.cpu_clks);
+
+		if (ret != 0)
+			goto err;
+	}
+
+	return;
+
+err:
+	panic("davinci_common_init: SoC Initialization failed\n");
+}
-- 
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