Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / arm926ejs / mxs / iomux.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/mxs/iomux.c b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/mxs/iomux.c
new file mode 100644 (file)
index 0000000..2e6be06
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/mxs/iomux.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
+ * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
+ *                       <armlinux@phytec.de>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/imx-regs.h>
+
+#if    defined(CONFIG_MX23)
+#define        DRIVE_OFFSET    0x200
+#define        PULL_OFFSET     0x400
+#elif  defined(CONFIG_MX28)
+#define        DRIVE_OFFSET    0x300
+#define        PULL_OFFSET     0x600
+#else
+#error "Please select CONFIG_MX23 or CONFIG_MX28"
+#endif
+
+/*
+ * configures a single pad in the iomuxer
+ */
+int mxs_iomux_setup_pad(iomux_cfg_t pad)
+{
+       u32 reg, ofs, bp, bm;
+       void *iomux_base = (void *)MXS_PINCTRL_BASE;
+       struct mxs_register_32 *mxs_reg;
+
+       /* muxsel */
+       ofs = 0x100;
+       ofs += PAD_BANK(pad) * 0x20 + PAD_PIN(pad) / 16 * 0x10;
+       bp = PAD_PIN(pad) % 16 * 2;
+       bm = 0x3 << bp;
+       reg = readl(iomux_base + ofs);
+       reg &= ~bm;
+       reg |= PAD_MUXSEL(pad) << bp;
+       writel(reg, iomux_base + ofs);
+
+       /* drive */
+       ofs = DRIVE_OFFSET;
+       ofs += PAD_BANK(pad) * 0x40 + PAD_PIN(pad) / 8 * 0x10;
+       /* mA */
+       if (PAD_MA_VALID(pad)) {
+               bp = PAD_PIN(pad) % 8 * 4;
+               bm = 0x3 << bp;
+               reg = readl(iomux_base + ofs);
+               reg &= ~bm;
+               reg |= PAD_MA(pad) << bp;
+               writel(reg, iomux_base + ofs);
+       }
+       /* vol */
+       if (PAD_VOL_VALID(pad)) {
+               bp = PAD_PIN(pad) % 8 * 4 + 2;
+               mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
+               if (PAD_VOL(pad))
+                       writel(1 << bp, &mxs_reg->reg_set);
+               else
+                       writel(1 << bp, &mxs_reg->reg_clr);
+       }
+
+       /* pull */
+       if (PAD_PULL_VALID(pad)) {
+               ofs = PULL_OFFSET;
+               ofs += PAD_BANK(pad) * 0x10;
+               bp = PAD_PIN(pad);
+               mxs_reg = (struct mxs_register_32 *)(iomux_base + ofs);
+               if (PAD_PULL(pad))
+                       writel(1 << bp, &mxs_reg->reg_set);
+               else
+                       writel(1 << bp, &mxs_reg->reg_clr);
+       }
+
+       return 0;
+}
+
+int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count)
+{
+       const iomux_cfg_t *p = pad_list;
+       int i;
+       int ret;
+
+       for (i = 0; i < count; i++) {
+               ret = mxs_iomux_setup_pad(*p);
+               if (ret)
+                       return ret;
+               p++;
+       }
+
+       return 0;
+}