Digi Release Code - 02142011 Missing Files Fix2.6.31-digi-201102141503

1 files changed, 234 insertions, 0 deletions

diff --git a/drivers/char/fsl_otp.h b/drivers/char/fsl_otp.h
new file mode 100755
index 000000000000..72ec23450dce
--- /dev/null
+++ b/drivers/char/fsl_otp.h
@@ -0,0 +1,234 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef __FREESCALE_OTP__
+#define __FREESCALE_OTP__
+
+#define log(a, ...) printk(KERN_INFO "[ %s : %.3d ] "a"\n", \
+			__func__, __LINE__,  ## __VA_ARGS__)
+
+static int otp_wait_busy(u32 flags);
+
+/* IMX23 and IMX28 share most of the defination ========================= */
+#if (defined(CONFIG_ARCH_MX23) || defined(CONFIG_ARCH_MX28))
+
+#include <linux/regulator/consumer.h>
+#include <mach/hardware.h>
+#include <mach/device.h>
+#include <mach/regs-ocotp.h>
+#include <mach/regs-power.h>
+
+#if defined(CONFIG_ARCH_MX23)
+#include <mach/mx23.h>
+#else
+#include <mach/mx28.h>
+#endif
+
+#define REGS_OCOTP_BASE		(IO_ADDRESS(OCOTP_PHYS_ADDR))
+#define BF(value, field)	(((value) << BP_##field) & BM_##field)
+
+static unsigned long otp_hclk_saved;
+static u32 otp_voltage_saved;
+struct regulator *regu;
+
+/* open the bank for the imx23/imx28 */
+static int otp_read_prepare(void)
+{
+	int r;
+
+	/* [1] set the HCLK */
+	/* [2] check BUSY and ERROR bit */
+	r = otp_wait_busy(0);
+	if (r < 0)
+		goto error;
+
+	/* [3] open bank */
+	__raw_writel(BM_OCOTP_CTRL_RD_BANK_OPEN,
+			REGS_OCOTP_BASE + HW_OCOTP_CTRL_SET);
+	udelay(10);
+
+	/* [4] wait for BUSY */
+	r = otp_wait_busy(0);
+	return 0;
+error:
+	return r;
+}
+
+static int otp_read_post(void)
+{
+	/* [5] close bank */
+	__raw_writel(BM_OCOTP_CTRL_RD_BANK_OPEN,
+			REGS_OCOTP_BASE + HW_OCOTP_CTRL_CLR);
+	return 0;
+}
+
+static int otp_write_prepare(struct fsl_otp_data *otp_data)
+{
+	struct clk *hclk;
+	int err = 0;
+
+	/* [1] HCLK to 24MHz. */
+	hclk = clk_get(NULL, "hclk");
+	if (IS_ERR(hclk)) {
+		err = PTR_ERR(hclk);
+		goto out;
+	}
+	/*
+	   WARNING  ACHTUNG  UWAGA
+
+	   the code below changes HCLK clock rate to 24M. This is
+	   required to write OTP bits (7.2.2 in STMP378x Target
+	   Specification), and might affect LCD operation, for example.
+	   Moreover, this hacky code changes VDDIO to 2.8V; and resto-
+	   res it only on otp_close(). This may affect... anything.
+
+	   You are warned now.
+	 */
+	otp_hclk_saved = clk_get_rate(hclk);
+	clk_set_rate(hclk, 24000);
+
+	/* [2] The voltage is set to 2.8V */
+	regu = regulator_get(NULL, otp_data->regulator_name);
+	otp_voltage_saved = regulator_get_voltage(regu);
+	regulator_set_voltage(regu, 2800000, 2800000);
+
+	/* [3] wait for BUSY and ERROR */
+	err = otp_wait_busy(BM_OCOTP_CTRL_RD_BANK_OPEN);
+out:
+	return err;
+}
+
+static int otp_write_post(void)
+{
+	struct clk *hclk;
+
+	hclk = clk_get(NULL, "hclk");
+
+	/* restore the clock and voltage */
+	clk_set_rate(hclk, otp_hclk_saved);
+	regulator_set_voltage(regu, otp_voltage_saved, otp_voltage_saved);
+	otp_wait_busy(0);
+
+	/* reset */
+	__raw_writel(BM_OCOTP_CTRL_RELOAD_SHADOWS,
+			REGS_OCOTP_BASE + HW_OCOTP_CTRL_SET);
+	otp_wait_busy(BM_OCOTP_CTRL_RELOAD_SHADOWS);
+	return 0;
+}
+
+static int __init map_ocotp_addr(struct platform_device *pdev)
+{
+	return 0;
+}
+static void unmap_ocotp_addr(void)
+{
+}
+
+#elif defined(CONFIG_ARCH_MX5) /* IMX5 below ============================= */
+
+#include <mach/hardware.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include "regs-ocotp-v2.h"
+
+static void *otp_base;
+#define REGS_OCOTP_BASE		((unsigned long)otp_base)
+#define HW_OCOTP_CUSTn(n)	(0x00000030 + (n) * 0x10)
+#define BF(value, field) 	(((value) << BP_##field) & BM_##field)
+
+#define DEF_RELEX	(15)	/* > 10.5ns */
+
+static int set_otp_timing(void)
+{
+	struct clk *apb_clk;
+	unsigned long clk_rate = 0;
+	unsigned long relex, sclk_count, rd_busy;
+	u32 timing = 0;
+
+	/* [1] get the clock. It needs the AHB clock,though doc writes APB.*/
+	apb_clk = clk_get(NULL, "ahb_clk");
+	if (IS_ERR(apb_clk)) {
+		log("we can not find the clock");
+		return -1;
+	}
+	clk_rate = clk_get_rate(apb_clk);
+
+	/* do optimization for too many zeros */
+	relex	= clk_rate / (1000000000 / DEF_RELEX) + 1;
+	sclk_count = clk_rate / (1000000000 / 5000) + 1 + DEF_RELEX;
+	rd_busy	= clk_rate / (1000000000 / 300)	+ 1;
+
+	timing = BF(relex, OCOTP_TIMING_RELAX);
+	timing |= BF(sclk_count, OCOTP_TIMING_SCLK_COUNT);
+	timing |= BF(rd_busy, OCOTP_TIMING_RD_BUSY);
+
+	__raw_writel(timing, REGS_OCOTP_BASE + HW_OCOTP_TIMING);
+	return 0;
+}
+
+/* IMX5 does not need to open the bank anymore */
+static int otp_read_prepare(void)
+{
+	return set_otp_timing();
+}
+static int otp_read_post(void)
+{
+	return 0;
+}
+
+static int otp_write_prepare(struct fsl_otp_data *otp_data)
+{
+	int ret = 0;
+
+	/* [1] set timing */
+	ret = set_otp_timing();
+	if (ret)
+		return ret;
+
+	/* [2] wait */
+	otp_wait_busy(0);
+	return 0;
+}
+static int otp_write_post(void)
+{
+	/* Reload all the shadow registers */
+	__raw_writel(BM_OCOTP_CTRL_RELOAD_SHADOWS,
+			REGS_OCOTP_BASE + HW_OCOTP_CTRL_SET);
+	udelay(1);
+	otp_wait_busy(BM_OCOTP_CTRL_RELOAD_SHADOWS);
+	return 0;
+}
+
+static int __init map_ocotp_addr(struct platform_device *pdev)
+{
+	struct resource *res;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	otp_base = ioremap(res->start, SZ_8K);
+	if (!otp_base) {
+		log("Can not remap the OTP iomem!");
+		return -1;
+	}
+	return 0;
+}
+
+static void unmap_ocotp_addr(void)
+{
+	iounmap(otp_base);
+	otp_base = NULL;
+}
+#endif /* CONFIG_ARCH_MX5 */
+#endif