imx: reorganize IMX code as other SOCs

Change is consistent with other SOCs and it is in preparation
for adding SOMs. SOC's related files are moved from cpu/ to
mach-imx/<SOC>.

This change is also coherent with the structure in kernel.

Signed-off-by: Stefano Babic <sbabic@denx.de>

CC: Fabio Estevam <fabio.estevam@nxp.com>
CC: Akshay Bhat <akshaybhat@timesys.com>
CC: Ken Lin <Ken.Lin@advantech.com.tw>
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CC: Christian Gmeiner <christian.gmeiner@gmail.com>
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CC: Troy Kisky <troy.kisky@boundarydevices.com>
CC: Nikita Kiryanov <nikita@compulab.co.il>
CC: Otavio Salvador <otavio@ossystems.com.br>
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CC: Jagan Teki <jagan@amarulasolutions.com>
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CC: Adam Ford <aford173@gmail.com>
CC: "Albert ARIBAUD (3ADEV)" <albert.aribaud@3adev.fr>
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CC: Francesco Montefoschi <francesco.montefoschi@udoo.org>
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CC: "Łukasz Majewski" <l.majewski@samsung.com>
CC: Patrice Chotard <patrice.chotard@st.com>
CC: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
CC: Hans de Goede <hdegoede@redhat.com>
CC: Masahiro Yamada <yamada.masahiro@socionext.com>
CC: Stephen Warren <swarren@nvidia.com>
CC: Andre Przywara <andre.przywara@arm.com>
CC: "Álvaro Fernández Rojas" <noltari@gmail.com>
CC: York Sun <york.sun@nxp.com>
CC: Xiaoliang Yang <xiaoliang.yang@nxp.com>
CC: Chen-Yu Tsai <wens@csie.org>
CC: George McCollister <george.mccollister@gmail.com>
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CC: Petr Kulhavy <brain@jikos.cz>
CC: Eric Nelson <eric@nelint.com>
CC: Bai Ping <ping.bai@nxp.com>
CC: Anson Huang <Anson.Huang@nxp.com>
CC: Sanchayan Maity <maitysanchayan@gmail.com>
CC: Lokesh Vutla <lokeshvutla@ti.com>
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CC: u-boot@lists.denx.de
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>

1 files changed, 149 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/iomux-v3.c b/arch/arm/mach-imx/iomux-v3.c
new file mode 100644
index 0000000000..94d660015d
--- /dev/null
+++ b/arch/arm/mach-imx/iomux-v3.c
@@ -0,0 +1,149 @@
+/*
+ * Based on the iomux-v3.c from Linux kernel:
+ * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
+ * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
+ *                       <armlinux@phytec.de>
+ *
+ * Copyright (C) 2004-2011 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm/mach-imx/sys_proto.h>
+
+static void *base = (void *)IOMUXC_BASE_ADDR;
+
+/*
+ * configures a single pad in the iomuxer
+ */
+void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
+{
+	u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
+	u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
+	u32 sel_input_ofs =
+		(pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
+	u32 sel_input =
+		(pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
+	u32 pad_ctrl_ofs =
+		(pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
+	u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
+
+#if defined(CONFIG_MX6SL) || defined(CONFIG_MX6SLL)
+	/* Check whether LVE bit needs to be set */
+	if (pad_ctrl & PAD_CTL_LVE) {
+		pad_ctrl &= ~PAD_CTL_LVE;
+		pad_ctrl |= PAD_CTL_LVE_BIT;
+	}
+#endif
+
+#ifdef CONFIG_IOMUX_LPSR
+	u32 lpsr = (pad & MUX_MODE_LPSR) >> MUX_MODE_SHIFT;
+
+#ifdef CONFIG_MX7
+	if (lpsr == IOMUX_CONFIG_LPSR) {
+		base = (void *)IOMUXC_LPSR_BASE_ADDR;
+		mux_mode &= ~IOMUX_CONFIG_LPSR;
+		/* set daisy chain sel_input */
+		if (sel_input_ofs)
+			sel_input_ofs += IOMUX_LPSR_SEL_INPUT_OFS;
+	}
+#else
+	if (is_mx6ull() || is_mx6sll()) {
+		if (lpsr == IOMUX_CONFIG_LPSR) {
+			base = (void *)IOMUXC_SNVS_BASE_ADDR;
+			mux_mode &= ~IOMUX_CONFIG_LPSR;
+		}
+	}
+#endif
+#endif
+
+	if (is_mx7() || is_mx6ull() || is_mx6sll() || mux_ctrl_ofs)
+		__raw_writel(mux_mode, base + mux_ctrl_ofs);
+
+	if (sel_input_ofs)
+		__raw_writel(sel_input, base + sel_input_ofs);
+
+#ifdef CONFIG_IOMUX_SHARE_CONF_REG
+	if (!(pad_ctrl & NO_PAD_CTRL))
+		__raw_writel((mux_mode << PAD_MUX_MODE_SHIFT) | pad_ctrl,
+			base + pad_ctrl_ofs);
+#else
+	if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
+		__raw_writel(pad_ctrl, base + pad_ctrl_ofs);
+#if defined(CONFIG_MX6SLL)
+	else if ((pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
+		clrbits_le32(base + pad_ctrl_ofs, PAD_CTL_IPD_BIT);
+#endif
+#endif
+
+#ifdef CONFIG_IOMUX_LPSR
+	if (lpsr == IOMUX_CONFIG_LPSR)
+		base = (void *)IOMUXC_BASE_ADDR;
+#endif
+
+}
+
+/* configures a list of pads within declared with IOMUX_PADS macro */
+void imx_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t const *pad_list,
+				      unsigned count)
+{
+	iomux_v3_cfg_t const *p = pad_list;
+	int stride;
+	int i;
+
+#if defined(CONFIG_MX6QDL)
+	stride = 2;
+	if (!is_mx6dq() && !is_mx6dqp())
+		p += 1;
+#else
+	stride = 1;
+#endif
+	for (i = 0; i < count; i++) {
+		imx_iomux_v3_setup_pad(*p);
+		p += stride;
+	}
+}
+
+void imx_iomux_set_gpr_register(int group, int start_bit,
+					int num_bits, int value)
+{
+	int i = 0;
+	u32 reg;
+	reg = readl(base + group * 4);
+	while (num_bits) {
+		reg &= ~(1<<(start_bit + i));
+		i++;
+		num_bits--;
+	}
+	reg |= (value << start_bit);
+	writel(reg, base + group * 4);
+}
+
+#ifdef CONFIG_IOMUX_SHARE_CONF_REG
+void imx_iomux_gpio_set_direction(unsigned int gpio,
+				unsigned int direction)
+{
+	u32 reg;
+	/*
+	 * Only on Vybrid the input/output buffer enable flags
+	 * are part of the shared mux/conf register.
+	 */
+	reg = readl(base + (gpio << 2));
+
+	if (direction)
+		reg |= 0x2;
+	else
+		reg &= ~0x2;
+
+	writel(reg, base + (gpio << 2));
+}
+
+void imx_iomux_gpio_get_function(unsigned int gpio, u32 *gpio_state)
+{
+	*gpio_state = readl(base + (gpio << 2)) &
+		((0X07 << PAD_MUX_MODE_SHIFT) | PAD_CTL_OBE_IBE_ENABLE);
+}
+#endif