Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

8 files changed, 1702 insertions, 0 deletions

diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile
new file mode 100644
index 000000000..fbb0747c7
--- /dev/null
+++ b/arch/mips/lantiq/xway/Makefile
@@ -0,0 +1,3 @@
+obj-y := prom.o sysctrl.o clk.o dma.o gptu.o dcdc.o
+
+obj-y += vmmc.o
diff --git a/arch/mips/lantiq/xway/clk.c b/arch/mips/lantiq/xway/clk.c
new file mode 100644
index 000000000..41fc30d8e
--- /dev/null
+++ b/arch/mips/lantiq/xway/clk.c
@@ -0,0 +1,353 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2010 John Crispin <john@phrozen.org>
+ *  Copyright (C) 2013-2015 Lantiq Beteiligungs-GmbH & Co.KG
+ */
+
+#include <linux/io.h>
+#include <linux/export.h>
+#include <linux/clk.h>
+
+#include <asm/time.h>
+#include <asm/irq.h>
+#include <asm/div64.h>
+
+#include <lantiq_soc.h>
+
+#include "../clk.h"
+
+static unsigned int ram_clocks[] = {
+	CLOCK_167M, CLOCK_133M, CLOCK_111M, CLOCK_83M };
+#define DDR_HZ ram_clocks[ltq_cgu_r32(CGU_SYS) & 0x3]
+
+/* legacy xway clock */
+#define CGU_SYS			0x10
+
+/* vr9, ar10/grx390 clock */
+#define CGU_SYS_XRX		0x0c
+#define CGU_IF_CLK_AR10		0x24
+
+unsigned long ltq_danube_fpi_hz(void)
+{
+	unsigned long ddr_clock = DDR_HZ;
+
+	if (ltq_cgu_r32(CGU_SYS) & 0x40)
+		return ddr_clock >> 1;
+	return ddr_clock;
+}
+
+unsigned long ltq_danube_cpu_hz(void)
+{
+	switch (ltq_cgu_r32(CGU_SYS) & 0xc) {
+	case 0:
+		return CLOCK_333M;
+	case 4:
+		return DDR_HZ;
+	case 8:
+		return DDR_HZ << 1;
+	default:
+		return DDR_HZ >> 1;
+	}
+}
+
+unsigned long ltq_danube_pp32_hz(void)
+{
+	unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 7) & 3;
+	unsigned long clk;
+
+	switch (clksys) {
+	case 1:
+		clk = CLOCK_240M;
+		break;
+	case 2:
+		clk = CLOCK_222M;
+		break;
+	case 3:
+		clk = CLOCK_133M;
+		break;
+	default:
+		clk = CLOCK_266M;
+		break;
+	}
+
+	return clk;
+}
+
+unsigned long ltq_ar9_sys_hz(void)
+{
+	if (((ltq_cgu_r32(CGU_SYS) >> 3) & 0x3) == 0x2)
+		return CLOCK_393M;
+	return CLOCK_333M;
+}
+
+unsigned long ltq_ar9_fpi_hz(void)
+{
+	unsigned long sys = ltq_ar9_sys_hz();
+
+	if (ltq_cgu_r32(CGU_SYS) & BIT(0))
+		return sys / 3;
+	else
+		return sys / 2;
+}
+
+unsigned long ltq_ar9_cpu_hz(void)
+{
+	if (ltq_cgu_r32(CGU_SYS) & BIT(2))
+		return ltq_ar9_fpi_hz();
+	else
+		return ltq_ar9_sys_hz();
+}
+
+unsigned long ltq_vr9_cpu_hz(void)
+{
+	unsigned int cpu_sel;
+	unsigned long clk;
+
+	cpu_sel = (ltq_cgu_r32(CGU_SYS_XRX) >> 4) & 0xf;
+
+	switch (cpu_sel) {
+	case 0:
+		clk = CLOCK_600M;
+		break;
+	case 1:
+		clk = CLOCK_500M;
+		break;
+	case 2:
+		clk = CLOCK_393M;
+		break;
+	case 3:
+		clk = CLOCK_333M;
+		break;
+	case 5:
+	case 6:
+		clk = CLOCK_196_608M;
+		break;
+	case 7:
+		clk = CLOCK_167M;
+		break;
+	case 4:
+	case 8:
+	case 9:
+		clk = CLOCK_125M;
+		break;
+	default:
+		clk = 0;
+		break;
+	}
+
+	return clk;
+}
+
+unsigned long ltq_vr9_fpi_hz(void)
+{
+	unsigned int ocp_sel, cpu_clk;
+	unsigned long clk;
+
+	cpu_clk = ltq_vr9_cpu_hz();
+	ocp_sel = ltq_cgu_r32(CGU_SYS_XRX) & 0x3;
+
+	switch (ocp_sel) {
+	case 0:
+		/* OCP ratio 1 */
+		clk = cpu_clk;
+		break;
+	case 2:
+		/* OCP ratio 2 */
+		clk = cpu_clk / 2;
+		break;
+	case 3:
+		/* OCP ratio 2.5 */
+		clk = (cpu_clk * 2) / 5;
+		break;
+	case 4:
+		/* OCP ratio 3 */
+		clk = cpu_clk / 3;
+		break;
+	default:
+		clk = 0;
+		break;
+	}
+
+	return clk;
+}
+
+unsigned long ltq_vr9_pp32_hz(void)
+{
+	unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 16) & 0x7;
+	unsigned long clk;
+
+	switch (clksys) {
+	case 0:
+		clk = CLOCK_500M;
+		break;
+	case 1:
+		clk = CLOCK_432M;
+		break;
+	case 2:
+		clk = CLOCK_288M;
+		break;
+	default:
+		clk = CLOCK_500M;
+		break;
+	}
+
+	return clk;
+}
+
+unsigned long ltq_ar10_cpu_hz(void)
+{
+	unsigned int clksys;
+	int cpu_fs = (ltq_cgu_r32(CGU_SYS_XRX) >> 8) & 0x1;
+	int freq_div = (ltq_cgu_r32(CGU_SYS_XRX) >> 4) & 0x7;
+
+	switch (cpu_fs) {
+	case 0:
+		clksys = CLOCK_500M;
+		break;
+	case 1:
+		clksys = CLOCK_600M;
+		break;
+	default:
+		clksys = CLOCK_500M;
+		break;
+	}
+
+	switch (freq_div) {
+	case 0:
+		return clksys;
+	case 1:
+		return clksys >> 1;
+	case 2:
+		return clksys >> 2;
+	default:
+		return clksys;
+	}
+}
+
+unsigned long ltq_ar10_fpi_hz(void)
+{
+	int freq_fpi = (ltq_cgu_r32(CGU_IF_CLK_AR10) >> 25) & 0xf;
+
+	switch (freq_fpi) {
+	case 1:
+		return CLOCK_300M;
+	case 5:
+		return CLOCK_250M;
+	case 2:
+		return CLOCK_150M;
+	case 6:
+		return CLOCK_125M;
+
+	default:
+		return CLOCK_125M;
+	}
+}
+
+unsigned long ltq_ar10_pp32_hz(void)
+{
+	unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 16) & 0x7;
+	unsigned long clk;
+
+	switch (clksys) {
+	case 1:
+		clk = CLOCK_250M;
+		break;
+	case 4:
+		clk = CLOCK_400M;
+		break;
+	default:
+		clk = CLOCK_250M;
+		break;
+	}
+
+	return clk;
+}
+
+unsigned long ltq_grx390_cpu_hz(void)
+{
+	unsigned int clksys;
+	int cpu_fs = ((ltq_cgu_r32(CGU_SYS_XRX) >> 9) & 0x3);
+	int freq_div = ((ltq_cgu_r32(CGU_SYS_XRX) >> 4) & 0x7);
+
+	switch (cpu_fs) {
+	case 0:
+		clksys = CLOCK_600M;
+		break;
+	case 1:
+		clksys = CLOCK_666M;
+		break;
+	case 2:
+		clksys = CLOCK_720M;
+		break;
+	default:
+		clksys = CLOCK_600M;
+		break;
+	}
+
+	switch (freq_div) {
+	case 0:
+		return clksys;
+	case 1:
+		return clksys >> 1;
+	case 2:
+		return clksys >> 2;
+	default:
+		return clksys;
+	}
+}
+
+unsigned long ltq_grx390_fpi_hz(void)
+{
+	/* fpi clock is derived from ddr_clk */
+	unsigned int clksys;
+	int cpu_fs = ((ltq_cgu_r32(CGU_SYS_XRX) >> 9) & 0x3);
+	int freq_div = ((ltq_cgu_r32(CGU_SYS_XRX)) & 0x7);
+	switch (cpu_fs) {
+	case 0:
+		clksys = CLOCK_600M;
+		break;
+	case 1:
+		clksys = CLOCK_666M;
+		break;
+	case 2:
+		clksys = CLOCK_720M;
+		break;
+	default:
+		clksys = CLOCK_600M;
+		break;
+	}
+
+	switch (freq_div) {
+	case 1:
+		return clksys >> 1;
+	case 2:
+		return clksys >> 2;
+	default:
+		return clksys >> 1;
+	}
+}
+
+unsigned long ltq_grx390_pp32_hz(void)
+{
+	unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 16) & 0x7;
+	unsigned long clk;
+
+	switch (clksys) {
+	case 1:
+		clk = CLOCK_250M;
+		break;
+	case 2:
+		clk = CLOCK_432M;
+		break;
+	case 4:
+		clk = CLOCK_400M;
+		break;
+	default:
+		clk = CLOCK_250M;
+		break;
+	}
+	return clk;
+}
diff --git a/arch/mips/lantiq/xway/dcdc.c b/arch/mips/lantiq/xway/dcdc.c
new file mode 100644
index 000000000..08f7abaad
--- /dev/null
+++ b/arch/mips/lantiq/xway/dcdc.c
@@ -0,0 +1,62 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2012 John Crispin <john@phrozen.org>
+ *  Copyright (C) 2010 Sameer Ahmad, Lantiq GmbH
+ */
+
+#include <linux/ioport.h>
+#include <linux/of_platform.h>
+
+#include <lantiq_soc.h>
+
+/* Bias and regulator Setup Register */
+#define DCDC_BIAS_VREG0	0xa
+/* Bias and regulator Setup Register */
+#define DCDC_BIAS_VREG1	0xb
+
+#define dcdc_w8(x, y)	ltq_w8((x), dcdc_membase + (y))
+#define dcdc_r8(x)	ltq_r8(dcdc_membase + (x))
+
+static void __iomem *dcdc_membase;
+
+static int dcdc_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dcdc_membase = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(dcdc_membase))
+		return PTR_ERR(dcdc_membase);
+
+	dev_info(&pdev->dev, "Core Voltage : %d mV\n",
+		dcdc_r8(DCDC_BIAS_VREG1) * 8);
+
+	return 0;
+}
+
+static const struct of_device_id dcdc_match[] = {
+	{ .compatible = "lantiq,dcdc-xrx200" },
+	{},
+};
+
+static struct platform_driver dcdc_driver = {
+	.probe = dcdc_probe,
+	.driver = {
+		.name = "dcdc-xrx200",
+		.of_match_table = dcdc_match,
+	},
+};
+
+int __init dcdc_init(void)
+{
+	int ret = platform_driver_register(&dcdc_driver);
+
+	if (ret)
+		pr_info("dcdc: Error registering platform driver\n");
+	return ret;
+}
+
+arch_initcall(dcdc_init);
diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c
new file mode 100644
index 000000000..efee1c538
--- /dev/null
+++ b/arch/mips/lantiq/xway/dma.c
@@ -0,0 +1,278 @@
+/*
+ *   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.
+ *
+ *   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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ *   Copyright (C) 2011 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+#include <linux/export.h>
+#include <linux/spinlock.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+
+#include <lantiq_soc.h>
+#include <xway_dma.h>
+
+#define LTQ_DMA_ID		0x08
+#define LTQ_DMA_CTRL		0x10
+#define LTQ_DMA_CPOLL		0x14
+#define LTQ_DMA_CS		0x18
+#define LTQ_DMA_CCTRL		0x1C
+#define LTQ_DMA_CDBA		0x20
+#define LTQ_DMA_CDLEN		0x24
+#define LTQ_DMA_CIS		0x28
+#define LTQ_DMA_CIE		0x2C
+#define LTQ_DMA_PS		0x40
+#define LTQ_DMA_PCTRL		0x44
+#define LTQ_DMA_IRNEN		0xf4
+
+#define DMA_ID_CHNR		GENMASK(26, 20)	/* channel number */
+#define DMA_DESCPT		BIT(3)		/* descriptor complete irq */
+#define DMA_TX			BIT(8)		/* TX channel direction */
+#define DMA_CHAN_ON		BIT(0)		/* channel on / off bit */
+#define DMA_PDEN		BIT(6)		/* enable packet drop */
+#define DMA_CHAN_RST		BIT(1)		/* channel on / off bit */
+#define DMA_RESET		BIT(0)		/* channel on / off bit */
+#define DMA_IRQ_ACK		0x7e		/* IRQ status register */
+#define DMA_POLL		BIT(31)		/* turn on channel polling */
+#define DMA_CLK_DIV4		BIT(6)		/* polling clock divider */
+#define DMA_2W_BURST		BIT(1)		/* 2 word burst length */
+#define DMA_ETOP_ENDIANNESS	(0xf << 8) /* endianness swap etop channels */
+#define DMA_WEIGHT	(BIT(17) | BIT(16))	/* default channel wheight */
+
+#define ltq_dma_r32(x)			ltq_r32(ltq_dma_membase + (x))
+#define ltq_dma_w32(x, y)		ltq_w32(x, ltq_dma_membase + (y))
+#define ltq_dma_w32_mask(x, y, z)	ltq_w32_mask(x, y, \
+						ltq_dma_membase + (z))
+
+static void __iomem *ltq_dma_membase;
+static DEFINE_SPINLOCK(ltq_dma_lock);
+
+void
+ltq_dma_enable_irq(struct ltq_dma_channel *ch)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ltq_dma_lock, flags);
+	ltq_dma_w32(ch->nr, LTQ_DMA_CS);
+	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);
+	spin_unlock_irqrestore(&ltq_dma_lock, flags);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_enable_irq);
+
+void
+ltq_dma_disable_irq(struct ltq_dma_channel *ch)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ltq_dma_lock, flags);
+	ltq_dma_w32(ch->nr, LTQ_DMA_CS);
+	ltq_dma_w32_mask(1 << ch->nr, 0, LTQ_DMA_IRNEN);
+	spin_unlock_irqrestore(&ltq_dma_lock, flags);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_disable_irq);
+
+void
+ltq_dma_ack_irq(struct ltq_dma_channel *ch)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ltq_dma_lock, flags);
+	ltq_dma_w32(ch->nr, LTQ_DMA_CS);
+	ltq_dma_w32(DMA_IRQ_ACK, LTQ_DMA_CIS);
+	spin_unlock_irqrestore(&ltq_dma_lock, flags);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_ack_irq);
+
+void
+ltq_dma_open(struct ltq_dma_channel *ch)
+{
+	unsigned long flag;
+
+	spin_lock_irqsave(&ltq_dma_lock, flag);
+	ltq_dma_w32(ch->nr, LTQ_DMA_CS);
+	ltq_dma_w32_mask(0, DMA_CHAN_ON, LTQ_DMA_CCTRL);
+	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);
+	spin_unlock_irqrestore(&ltq_dma_lock, flag);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_open);
+
+void
+ltq_dma_close(struct ltq_dma_channel *ch)
+{
+	unsigned long flag;
+
+	spin_lock_irqsave(&ltq_dma_lock, flag);
+	ltq_dma_w32(ch->nr, LTQ_DMA_CS);
+	ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL);
+	ltq_dma_w32_mask(1 << ch->nr, 0, LTQ_DMA_IRNEN);
+	spin_unlock_irqrestore(&ltq_dma_lock, flag);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_close);
+
+static void
+ltq_dma_alloc(struct ltq_dma_channel *ch)
+{
+	unsigned long flags;
+
+	ch->desc = 0;
+	ch->desc_base = dma_zalloc_coherent(ch->dev,
+				LTQ_DESC_NUM * LTQ_DESC_SIZE,
+				&ch->phys, GFP_ATOMIC);
+
+	spin_lock_irqsave(&ltq_dma_lock, flags);
+	ltq_dma_w32(ch->nr, LTQ_DMA_CS);
+	ltq_dma_w32(ch->phys, LTQ_DMA_CDBA);
+	ltq_dma_w32(LTQ_DESC_NUM, LTQ_DMA_CDLEN);
+	ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL);
+	wmb();
+	ltq_dma_w32_mask(0, DMA_CHAN_RST, LTQ_DMA_CCTRL);
+	while (ltq_dma_r32(LTQ_DMA_CCTRL) & DMA_CHAN_RST)
+		;
+	spin_unlock_irqrestore(&ltq_dma_lock, flags);
+}
+
+void
+ltq_dma_alloc_tx(struct ltq_dma_channel *ch)
+{
+	unsigned long flags;
+
+	ltq_dma_alloc(ch);
+
+	spin_lock_irqsave(&ltq_dma_lock, flags);
+	ltq_dma_w32(DMA_DESCPT, LTQ_DMA_CIE);
+	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);
+	ltq_dma_w32(DMA_WEIGHT | DMA_TX, LTQ_DMA_CCTRL);
+	spin_unlock_irqrestore(&ltq_dma_lock, flags);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_alloc_tx);
+
+void
+ltq_dma_alloc_rx(struct ltq_dma_channel *ch)
+{
+	unsigned long flags;
+
+	ltq_dma_alloc(ch);
+
+	spin_lock_irqsave(&ltq_dma_lock, flags);
+	ltq_dma_w32(DMA_DESCPT, LTQ_DMA_CIE);
+	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);
+	ltq_dma_w32(DMA_WEIGHT, LTQ_DMA_CCTRL);
+	spin_unlock_irqrestore(&ltq_dma_lock, flags);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_alloc_rx);
+
+void
+ltq_dma_free(struct ltq_dma_channel *ch)
+{
+	if (!ch->desc_base)
+		return;
+	ltq_dma_close(ch);
+	dma_free_coherent(ch->dev, LTQ_DESC_NUM * LTQ_DESC_SIZE,
+		ch->desc_base, ch->phys);
+}
+EXPORT_SYMBOL_GPL(ltq_dma_free);
+
+void
+ltq_dma_init_port(int p)
+{
+	ltq_dma_w32(p, LTQ_DMA_PS);
+	switch (p) {
+	case DMA_PORT_ETOP:
+		/*
+		 * Tell the DMA engine to swap the endianness of data frames and
+		 * drop packets if the channel arbitration fails.
+		 */
+		ltq_dma_w32_mask(0, DMA_ETOP_ENDIANNESS | DMA_PDEN,
+			LTQ_DMA_PCTRL);
+		break;
+
+	case DMA_PORT_DEU:
+		ltq_dma_w32((DMA_2W_BURST << 4) | (DMA_2W_BURST << 2),
+			LTQ_DMA_PCTRL);
+		break;
+
+	default:
+		break;
+	}
+}
+EXPORT_SYMBOL_GPL(ltq_dma_init_port);
+
+static int
+ltq_dma_init(struct platform_device *pdev)
+{
+	struct clk *clk;
+	struct resource *res;
+	unsigned int id, nchannels;
+	int i;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ltq_dma_membase = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(ltq_dma_membase))
+		panic("Failed to remap dma resource");
+
+	/* power up and reset the dma engine */
+	clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(clk))
+		panic("Failed to get dma clock");
+
+	clk_enable(clk);
+	ltq_dma_w32_mask(0, DMA_RESET, LTQ_DMA_CTRL);
+
+	usleep_range(1, 10);
+
+	/* disable all interrupts */
+	ltq_dma_w32(0, LTQ_DMA_IRNEN);
+
+	/* reset/configure each channel */
+	id = ltq_dma_r32(LTQ_DMA_ID);
+	nchannels = ((id & DMA_ID_CHNR) >> 20);
+	for (i = 0; i < nchannels; i++) {
+		ltq_dma_w32(i, LTQ_DMA_CS);
+		ltq_dma_w32(DMA_CHAN_RST, LTQ_DMA_CCTRL);
+		ltq_dma_w32(DMA_POLL | DMA_CLK_DIV4, LTQ_DMA_CPOLL);
+		ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL);
+	}
+
+	dev_info(&pdev->dev,
+		"Init done - hw rev: %X, ports: %d, channels: %d\n",
+		id & 0x1f, (id >> 16) & 0xf, nchannels);
+
+	return 0;
+}
+
+static const struct of_device_id dma_match[] = {
+	{ .compatible = "lantiq,dma-xway" },
+	{},
+};
+
+static struct platform_driver dma_driver = {
+	.probe = ltq_dma_init,
+	.driver = {
+		.name = "dma-xway",
+		.of_match_table = dma_match,
+	},
+};
+
+int __init
+dma_init(void)
+{
+	return platform_driver_register(&dma_driver);
+}
+
+postcore_initcall(dma_init);
diff --git a/arch/mips/lantiq/xway/gptu.c b/arch/mips/lantiq/xway/gptu.c
new file mode 100644
index 000000000..7d4081d67
--- /dev/null
+++ b/arch/mips/lantiq/xway/gptu.c
@@ -0,0 +1,210 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2012 John Crispin <john@phrozen.org>
+ *  Copyright (C) 2012 Lantiq GmbH
+ */
+
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/of_irq.h>
+
+#include <lantiq_soc.h>
+#include "../clk.h"
+
+/* the magic ID byte of the core */
+#define GPTU_MAGIC	0x59
+/* clock control register */
+#define GPTU_CLC	0x00
+/* id register */
+#define GPTU_ID		0x08
+/* interrupt node enable */
+#define GPTU_IRNEN	0xf4
+/* interrupt control register */
+#define GPTU_IRCR	0xf8
+/* interrupt capture register */
+#define GPTU_IRNCR	0xfc
+/* there are 3 identical blocks of 2 timers. calculate register offsets */
+#define GPTU_SHIFT(x)	(x % 2 ? 4 : 0)
+#define GPTU_BASE(x)	(((x >> 1) * 0x20) + 0x10)
+/* timer control register */
+#define GPTU_CON(x)	(GPTU_BASE(x) + GPTU_SHIFT(x) + 0x00)
+/* timer auto reload register */
+#define GPTU_RUN(x)	(GPTU_BASE(x) + GPTU_SHIFT(x) + 0x08)
+/* timer manual reload register */
+#define GPTU_RLD(x)	(GPTU_BASE(x) + GPTU_SHIFT(x) + 0x10)
+/* timer count register */
+#define GPTU_CNT(x)	(GPTU_BASE(x) + GPTU_SHIFT(x) + 0x18)
+
+/* GPTU_CON(x) */
+#define CON_CNT		BIT(2)
+#define CON_EDGE_ANY	(BIT(7) | BIT(6))
+#define CON_SYNC	BIT(8)
+#define CON_CLK_INT	BIT(10)
+
+/* GPTU_RUN(x) */
+#define RUN_SEN		BIT(0)
+#define RUN_RL		BIT(2)
+
+/* set clock to runmode */
+#define CLC_RMC		BIT(8)
+/* bring core out of suspend */
+#define CLC_SUSPEND	BIT(4)
+/* the disable bit */
+#define CLC_DISABLE	BIT(0)
+
+#define gptu_w32(x, y)	ltq_w32((x), gptu_membase + (y))
+#define gptu_r32(x)	ltq_r32(gptu_membase + (x))
+
+enum gptu_timer {
+	TIMER1A = 0,
+	TIMER1B,
+	TIMER2A,
+	TIMER2B,
+	TIMER3A,
+	TIMER3B
+};
+
+static void __iomem *gptu_membase;
+static struct resource irqres[6];
+
+static irqreturn_t timer_irq_handler(int irq, void *priv)
+{
+	int timer = irq - irqres[0].start;
+	gptu_w32(1 << timer, GPTU_IRNCR);
+	return IRQ_HANDLED;
+}
+
+static void gptu_hwinit(void)
+{
+	gptu_w32(0x00, GPTU_IRNEN);
+	gptu_w32(0xff, GPTU_IRNCR);
+	gptu_w32(CLC_RMC | CLC_SUSPEND, GPTU_CLC);
+}
+
+static void gptu_hwexit(void)
+{
+	gptu_w32(0x00, GPTU_IRNEN);
+	gptu_w32(0xff, GPTU_IRNCR);
+	gptu_w32(CLC_DISABLE, GPTU_CLC);
+}
+
+static int gptu_enable(struct clk *clk)
+{
+	int ret = request_irq(irqres[clk->bits].start, timer_irq_handler,
+		IRQF_TIMER, "gtpu", NULL);
+	if (ret) {
+		pr_err("gptu: failed to request irq\n");
+		return ret;
+	}
+
+	gptu_w32(CON_CNT | CON_EDGE_ANY | CON_SYNC | CON_CLK_INT,
+		GPTU_CON(clk->bits));
+	gptu_w32(1, GPTU_RLD(clk->bits));
+	gptu_w32(gptu_r32(GPTU_IRNEN) | BIT(clk->bits), GPTU_IRNEN);
+	gptu_w32(RUN_SEN | RUN_RL, GPTU_RUN(clk->bits));
+	return 0;
+}
+
+static void gptu_disable(struct clk *clk)
+{
+	gptu_w32(0, GPTU_RUN(clk->bits));
+	gptu_w32(0, GPTU_CON(clk->bits));
+	gptu_w32(0, GPTU_RLD(clk->bits));
+	gptu_w32(gptu_r32(GPTU_IRNEN) & ~BIT(clk->bits), GPTU_IRNEN);
+	free_irq(irqres[clk->bits].start, NULL);
+}
+
+static inline void clkdev_add_gptu(struct device *dev, const char *con,
+							unsigned int timer)
+{
+	struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
+
+	if (!clk)
+		return;
+	clk->cl.dev_id = dev_name(dev);
+	clk->cl.con_id = con;
+	clk->cl.clk = clk;
+	clk->enable = gptu_enable;
+	clk->disable = gptu_disable;
+	clk->bits = timer;
+	clkdev_add(&clk->cl);
+}
+
+static int gptu_probe(struct platform_device *pdev)
+{
+	struct clk *clk;
+	struct resource *res;
+
+	if (of_irq_to_resource_table(pdev->dev.of_node, irqres, 6) != 6) {
+		dev_err(&pdev->dev, "Failed to get IRQ list\n");
+		return -EINVAL;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	/* remap gptu register range */
+	gptu_membase = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(gptu_membase))
+		return PTR_ERR(gptu_membase);
+
+	/* enable our clock */
+	clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev, "Failed to get clock\n");
+		return -ENOENT;
+	}
+	clk_enable(clk);
+
+	/* power up the core */
+	gptu_hwinit();
+
+	/* the gptu has a ID register */
+	if (((gptu_r32(GPTU_ID) >> 8) & 0xff) != GPTU_MAGIC) {
+		dev_err(&pdev->dev, "Failed to find magic\n");
+		gptu_hwexit();
+		clk_disable(clk);
+		clk_put(clk);
+		return -ENAVAIL;
+	}
+
+	/* register the clocks */
+	clkdev_add_gptu(&pdev->dev, "timer1a", TIMER1A);
+	clkdev_add_gptu(&pdev->dev, "timer1b", TIMER1B);
+	clkdev_add_gptu(&pdev->dev, "timer2a", TIMER2A);
+	clkdev_add_gptu(&pdev->dev, "timer2b", TIMER2B);
+	clkdev_add_gptu(&pdev->dev, "timer3a", TIMER3A);
+	clkdev_add_gptu(&pdev->dev, "timer3b", TIMER3B);
+
+	dev_info(&pdev->dev, "gptu: 6 timers loaded\n");
+
+	return 0;
+}
+
+static const struct of_device_id gptu_match[] = {
+	{ .compatible = "lantiq,gptu-xway" },
+	{},
+};
+
+static struct platform_driver dma_driver = {
+	.probe = gptu_probe,
+	.driver = {
+		.name = "gptu-xway",
+		.of_match_table = gptu_match,
+	},
+};
+
+int __init gptu_init(void)
+{
+	int ret = platform_driver_register(&dma_driver);
+
+	if (ret)
+		pr_info("gptu: Error registering platform driver\n");
+	return ret;
+}
+
+arch_initcall(gptu_init);
diff --git a/arch/mips/lantiq/xway/prom.c b/arch/mips/lantiq/xway/prom.c
new file mode 100644
index 000000000..9475b2510
--- /dev/null
+++ b/arch/mips/lantiq/xway/prom.c
@@ -0,0 +1,146 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2010 John Crispin <john@phrozen.org>
+ *  Copyright (C) 2013-2015 Lantiq Beteiligungs-GmbH & Co.KG
+ */
+
+#include <linux/export.h>
+#include <linux/clk.h>
+#include <asm/bootinfo.h>
+#include <asm/time.h>
+
+#include <lantiq_soc.h>
+
+#include "../prom.h"
+
+#define SOC_DANUBE	"Danube"
+#define SOC_TWINPASS	"Twinpass"
+#define SOC_AMAZON_SE	"Amazon_SE"
+#define SOC_AR9		"AR9"
+#define SOC_GR9		"GRX200"
+#define SOC_VR9		"xRX200"
+#define SOC_VRX220	"xRX220"
+#define SOC_AR10	"xRX300"
+#define SOC_GRX390	"xRX330"
+
+#define COMP_DANUBE	"lantiq,danube"
+#define COMP_TWINPASS	"lantiq,twinpass"
+#define COMP_AMAZON_SE	"lantiq,ase"
+#define COMP_AR9	"lantiq,ar9"
+#define COMP_GR9	"lantiq,gr9"
+#define COMP_VR9	"lantiq,vr9"
+#define COMP_AR10	"lantiq,ar10"
+#define COMP_GRX390	"lantiq,grx390"
+
+#define PART_SHIFT	12
+#define PART_MASK	0x0FFFFFFF
+#define REV_SHIFT	28
+#define REV_MASK	0xF0000000
+
+void __init ltq_soc_detect(struct ltq_soc_info *i)
+{
+	i->partnum = (ltq_r32(LTQ_MPS_CHIPID) & PART_MASK) >> PART_SHIFT;
+	i->rev = (ltq_r32(LTQ_MPS_CHIPID) & REV_MASK) >> REV_SHIFT;
+	sprintf(i->rev_type, "1.%d", i->rev);
+	switch (i->partnum) {
+	case SOC_ID_DANUBE1:
+	case SOC_ID_DANUBE2:
+		i->name = SOC_DANUBE;
+		i->type = SOC_TYPE_DANUBE;
+		i->compatible = COMP_DANUBE;
+		break;
+
+	case SOC_ID_TWINPASS:
+		i->name = SOC_TWINPASS;
+		i->type = SOC_TYPE_DANUBE;
+		i->compatible = COMP_TWINPASS;
+		break;
+
+	case SOC_ID_ARX188:
+	case SOC_ID_ARX168_1:
+	case SOC_ID_ARX168_2:
+	case SOC_ID_ARX182:
+		i->name = SOC_AR9;
+		i->type = SOC_TYPE_AR9;
+		i->compatible = COMP_AR9;
+		break;
+
+	case SOC_ID_GRX188:
+	case SOC_ID_GRX168:
+		i->name = SOC_GR9;
+		i->type = SOC_TYPE_AR9;
+		i->compatible = COMP_GR9;
+		break;
+
+	case SOC_ID_AMAZON_SE_1:
+	case SOC_ID_AMAZON_SE_2:
+#ifdef CONFIG_PCI
+		panic("ase is only supported for non pci kernels");
+#endif
+		i->name = SOC_AMAZON_SE;
+		i->type = SOC_TYPE_AMAZON_SE;
+		i->compatible = COMP_AMAZON_SE;
+		break;
+
+	case SOC_ID_VRX282:
+	case SOC_ID_VRX268:
+	case SOC_ID_VRX288:
+		i->name = SOC_VR9;
+		i->type = SOC_TYPE_VR9;
+		i->compatible = COMP_VR9;
+		break;
+
+	case SOC_ID_GRX268:
+	case SOC_ID_GRX288:
+		i->name = SOC_GR9;
+		i->type = SOC_TYPE_VR9;
+		i->compatible = COMP_GR9;
+		break;
+
+	case SOC_ID_VRX268_2:
+	case SOC_ID_VRX288_2:
+		i->name = SOC_VR9;
+		i->type = SOC_TYPE_VR9_2;
+		i->compatible = COMP_VR9;
+		break;
+
+	case SOC_ID_VRX220:
+		i->name = SOC_VRX220;
+		i->type = SOC_TYPE_VRX220;
+		i->compatible = COMP_VR9;
+		break;
+
+	case SOC_ID_GRX282_2:
+	case SOC_ID_GRX288_2:
+		i->name = SOC_GR9;
+		i->type = SOC_TYPE_VR9_2;
+		i->compatible = COMP_GR9;
+		break;
+
+	case SOC_ID_ARX362:
+	case SOC_ID_ARX368:
+	case SOC_ID_ARX382:
+	case SOC_ID_ARX388:
+	case SOC_ID_URX388:
+		i->name = SOC_AR10;
+		i->type = SOC_TYPE_AR10;
+		i->compatible = COMP_AR10;
+		break;
+
+	case SOC_ID_GRX383:
+	case SOC_ID_GRX369:
+	case SOC_ID_GRX387:
+	case SOC_ID_GRX389:
+		i->name = SOC_GRX390;
+		i->type = SOC_TYPE_GRX390;
+		i->compatible = COMP_GRX390;
+		break;
+
+	default:
+		unreachable();
+		break;
+	}
+}
diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c
new file mode 100644
index 000000000..293ebb833
--- /dev/null
+++ b/arch/mips/lantiq/xway/sysctrl.c
@@ -0,0 +1,584 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2011-2012 John Crispin <john@phrozen.org>
+ *  Copyright (C) 2013-2015 Lantiq Beteiligungs-GmbH & Co.KG
+ */
+
+#include <linux/ioport.h>
+#include <linux/export.h>
+#include <linux/clkdev.h>
+#include <linux/spinlock.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+
+#include <lantiq_soc.h>
+
+#include "../clk.h"
+#include "../prom.h"
+
+/* clock control register for legacy */
+#define CGU_IFCCR	0x0018
+#define CGU_IFCCR_VR9	0x0024
+/* system clock register for legacy */
+#define CGU_SYS		0x0010
+/* pci control register */
+#define CGU_PCICR	0x0034
+#define CGU_PCICR_VR9	0x0038
+/* ephy configuration register */
+#define CGU_EPHY	0x10
+
+/* Legacy PMU register for ar9, ase, danube */
+/* power control register */
+#define PMU_PWDCR	0x1C
+/* power status register */
+#define PMU_PWDSR	0x20
+/* power control register */
+#define PMU_PWDCR1	0x24
+/* power status register */
+#define PMU_PWDSR1	0x28
+/* power control register */
+#define PWDCR(x) ((x) ? (PMU_PWDCR1) : (PMU_PWDCR))
+/* power status register */
+#define PWDSR(x) ((x) ? (PMU_PWDSR1) : (PMU_PWDSR))
+
+
+/* PMU register for ar10 and grx390 */
+
+/* First register set */
+#define PMU_CLK_SR	0x20 /* status */
+#define PMU_CLK_CR_A	0x24 /* Enable */
+#define PMU_CLK_CR_B	0x28 /* Disable */
+/* Second register set */
+#define PMU_CLK_SR1	0x30 /* status */
+#define PMU_CLK_CR1_A	0x34 /* Enable */
+#define PMU_CLK_CR1_B	0x38 /* Disable */
+/* Third register set */
+#define PMU_ANA_SR	0x40 /* status */
+#define PMU_ANA_CR_A	0x44 /* Enable */
+#define PMU_ANA_CR_B	0x48 /* Disable */
+
+/* Status */
+static u32 pmu_clk_sr[] = {
+	PMU_CLK_SR,
+	PMU_CLK_SR1,
+	PMU_ANA_SR,
+};
+
+/* Enable */
+static u32 pmu_clk_cr_a[] = {
+	PMU_CLK_CR_A,
+	PMU_CLK_CR1_A,
+	PMU_ANA_CR_A,
+};
+
+/* Disable */
+static u32 pmu_clk_cr_b[] = {
+	PMU_CLK_CR_B,
+	PMU_CLK_CR1_B,
+	PMU_ANA_CR_B,
+};
+
+#define PWDCR_EN_XRX(x)		(pmu_clk_cr_a[(x)])
+#define PWDCR_DIS_XRX(x)	(pmu_clk_cr_b[(x)])
+#define PWDSR_XRX(x)		(pmu_clk_sr[(x)])
+
+/* clock gates that we can en/disable */
+#define PMU_USB0_P	BIT(0)
+#define PMU_ASE_SDIO	BIT(2) /* ASE special */
+#define PMU_PCI		BIT(4)
+#define PMU_DMA		BIT(5)
+#define PMU_USB0	BIT(6)
+#define PMU_ASC0	BIT(7)
+#define PMU_EPHY	BIT(7)	/* ase */
+#define PMU_USIF	BIT(7) /* from vr9 until grx390 */
+#define PMU_SPI		BIT(8)
+#define PMU_DFE		BIT(9)
+#define PMU_EBU		BIT(10)
+#define PMU_STP		BIT(11)
+#define PMU_GPT		BIT(12)
+#define PMU_AHBS	BIT(13) /* vr9 */
+#define PMU_FPI		BIT(14)
+#define PMU_AHBM	BIT(15)
+#define PMU_SDIO	BIT(16) /* danube, ar9, vr9 */
+#define PMU_ASC1	BIT(17)
+#define PMU_PPE_QSB	BIT(18)
+#define PMU_PPE_SLL01	BIT(19)
+#define PMU_DEU		BIT(20)
+#define PMU_PPE_TC	BIT(21)
+#define PMU_PPE_EMA	BIT(22)
+#define PMU_PPE_DPLUM	BIT(23)
+#define PMU_PPE_DP	BIT(23)
+#define PMU_PPE_DPLUS	BIT(24)
+#define PMU_USB1_P	BIT(26)
+#define PMU_USB1	BIT(27)
+#define PMU_SWITCH	BIT(28)
+#define PMU_PPE_TOP	BIT(29)
+#define PMU_GPHY	BIT(30)
+#define PMU_PCIE_CLK	BIT(31)
+
+#define PMU1_PCIE_PHY	BIT(0)	/* vr9-specific,moved in ar10/grx390 */
+#define PMU1_PCIE_CTL	BIT(1)
+#define PMU1_PCIE_PDI	BIT(4)
+#define PMU1_PCIE_MSI	BIT(5)
+#define PMU1_CKE	BIT(6)
+#define PMU1_PCIE1_CTL	BIT(17)
+#define PMU1_PCIE1_PDI	BIT(20)
+#define PMU1_PCIE1_MSI	BIT(21)
+#define PMU1_PCIE2_CTL	BIT(25)
+#define PMU1_PCIE2_PDI	BIT(26)
+#define PMU1_PCIE2_MSI	BIT(27)
+
+#define PMU_ANALOG_USB0_P	BIT(0)
+#define PMU_ANALOG_USB1_P	BIT(1)
+#define PMU_ANALOG_PCIE0_P	BIT(8)
+#define PMU_ANALOG_PCIE1_P	BIT(9)
+#define PMU_ANALOG_PCIE2_P	BIT(10)
+#define PMU_ANALOG_DSL_AFE	BIT(16)
+#define PMU_ANALOG_DCDC_2V5	BIT(17)
+#define PMU_ANALOG_DCDC_1VX	BIT(18)
+#define PMU_ANALOG_DCDC_1V0	BIT(19)
+
+#define pmu_w32(x, y)	ltq_w32((x), pmu_membase + (y))
+#define pmu_r32(x)	ltq_r32(pmu_membase + (x))
+
+static void __iomem *pmu_membase;
+void __iomem *ltq_cgu_membase;
+void __iomem *ltq_ebu_membase;
+
+static u32 ifccr = CGU_IFCCR;
+static u32 pcicr = CGU_PCICR;
+
+static DEFINE_SPINLOCK(g_pmu_lock);
+
+/* legacy function kept alive to ease clkdev transition */
+void ltq_pmu_enable(unsigned int module)
+{
+	int retry = 1000000;
+
+	spin_lock(&g_pmu_lock);
+	pmu_w32(pmu_r32(PMU_PWDCR) & ~module, PMU_PWDCR);
+	do {} while (--retry && (pmu_r32(PMU_PWDSR) & module));
+	spin_unlock(&g_pmu_lock);
+
+	if (!retry)
+		panic("activating PMU module failed!");
+}
+EXPORT_SYMBOL(ltq_pmu_enable);
+
+/* legacy function kept alive to ease clkdev transition */
+void ltq_pmu_disable(unsigned int module)
+{
+	int retry = 1000000;
+
+	spin_lock(&g_pmu_lock);
+	pmu_w32(pmu_r32(PMU_PWDCR) | module, PMU_PWDCR);
+	do {} while (--retry && (!(pmu_r32(PMU_PWDSR) & module)));
+	spin_unlock(&g_pmu_lock);
+
+	if (!retry)
+		pr_warn("deactivating PMU module failed!");
+}
+EXPORT_SYMBOL(ltq_pmu_disable);
+
+/* enable a hw clock */
+static int cgu_enable(struct clk *clk)
+{
+	ltq_cgu_w32(ltq_cgu_r32(ifccr) | clk->bits, ifccr);
+	return 0;
+}
+
+/* disable a hw clock */
+static void cgu_disable(struct clk *clk)
+{
+	ltq_cgu_w32(ltq_cgu_r32(ifccr) & ~clk->bits, ifccr);
+}
+
+/* enable a clock gate */
+static int pmu_enable(struct clk *clk)
+{
+	int retry = 1000000;
+
+	if (of_machine_is_compatible("lantiq,ar10")
+	    || of_machine_is_compatible("lantiq,grx390")) {
+		pmu_w32(clk->bits, PWDCR_EN_XRX(clk->module));
+		do {} while (--retry &&
+			     (!(pmu_r32(PWDSR_XRX(clk->module)) & clk->bits)));
+
+	} else {
+		spin_lock(&g_pmu_lock);
+		pmu_w32(pmu_r32(PWDCR(clk->module)) & ~clk->bits,
+				PWDCR(clk->module));
+		do {} while (--retry &&
+			     (pmu_r32(PWDSR(clk->module)) & clk->bits));
+		spin_unlock(&g_pmu_lock);
+	}
+
+	if (!retry)
+		panic("activating PMU module failed!");
+
+	return 0;
+}
+
+/* disable a clock gate */
+static void pmu_disable(struct clk *clk)
+{
+	int retry = 1000000;
+
+	if (of_machine_is_compatible("lantiq,ar10")
+	    || of_machine_is_compatible("lantiq,grx390")) {
+		pmu_w32(clk->bits, PWDCR_DIS_XRX(clk->module));
+		do {} while (--retry &&
+			     (pmu_r32(PWDSR_XRX(clk->module)) & clk->bits));
+	} else {
+		spin_lock(&g_pmu_lock);
+		pmu_w32(pmu_r32(PWDCR(clk->module)) | clk->bits,
+				PWDCR(clk->module));
+		do {} while (--retry &&
+			     (!(pmu_r32(PWDSR(clk->module)) & clk->bits)));
+		spin_unlock(&g_pmu_lock);
+	}
+
+	if (!retry)
+		pr_warn("deactivating PMU module failed!");
+}
+
+/* the pci enable helper */
+static int pci_enable(struct clk *clk)
+{
+	unsigned int val = ltq_cgu_r32(ifccr);
+	/* set bus clock speed */
+	if (of_machine_is_compatible("lantiq,ar9") ||
+			of_machine_is_compatible("lantiq,vr9")) {
+		val &= ~0x1f00000;
+		if (clk->rate == CLOCK_33M)
+			val |= 0xe00000;
+		else
+			val |= 0x700000; /* 62.5M */
+	} else {
+		val &= ~0xf00000;
+		if (clk->rate == CLOCK_33M)
+			val |= 0x800000;
+		else
+			val |= 0x400000; /* 62.5M */
+	}
+	ltq_cgu_w32(val, ifccr);
+	pmu_enable(clk);
+	return 0;
+}
+
+/* enable the external clock as a source */
+static int pci_ext_enable(struct clk *clk)
+{
+	ltq_cgu_w32(ltq_cgu_r32(ifccr) & ~(1 << 16), ifccr);
+	ltq_cgu_w32((1 << 30), pcicr);
+	return 0;
+}
+
+/* disable the external clock as a source */
+static void pci_ext_disable(struct clk *clk)
+{
+	ltq_cgu_w32(ltq_cgu_r32(ifccr) | (1 << 16), ifccr);
+	ltq_cgu_w32((1 << 31) | (1 << 30), pcicr);
+}
+
+/* enable a clockout source */
+static int clkout_enable(struct clk *clk)
+{
+	int i;
+
+	/* get the correct rate */
+	for (i = 0; i < 4; i++) {
+		if (clk->rates[i] == clk->rate) {
+			int shift = 14 - (2 * clk->module);
+			int enable = 7 - clk->module;
+			unsigned int val = ltq_cgu_r32(ifccr);
+
+			val &= ~(3 << shift);
+			val |= i << shift;
+			val |= enable;
+			ltq_cgu_w32(val, ifccr);
+			return 0;
+		}
+	}
+	return -1;
+}
+
+/* manage the clock gates via PMU */
+static void clkdev_add_pmu(const char *dev, const char *con, bool deactivate,
+			   unsigned int module, unsigned int bits)
+{
+	struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
+
+	if (!clk)
+		return;
+	clk->cl.dev_id = dev;
+	clk->cl.con_id = con;
+	clk->cl.clk = clk;
+	clk->enable = pmu_enable;
+	clk->disable = pmu_disable;
+	clk->module = module;
+	clk->bits = bits;
+	if (deactivate) {
+		/*
+		 * Disable it during the initialization. Module should enable
+		 * when used
+		 */
+		pmu_disable(clk);
+	}
+	clkdev_add(&clk->cl);
+}
+
+/* manage the clock generator */
+static void clkdev_add_cgu(const char *dev, const char *con,
+					unsigned int bits)
+{
+	struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
+
+	if (!clk)
+		return;
+	clk->cl.dev_id = dev;
+	clk->cl.con_id = con;
+	clk->cl.clk = clk;
+	clk->enable = cgu_enable;
+	clk->disable = cgu_disable;
+	clk->bits = bits;
+	clkdev_add(&clk->cl);
+}
+
+/* pci needs its own enable function as the setup is a bit more complex */
+static unsigned long valid_pci_rates[] = {CLOCK_33M, CLOCK_62_5M, 0};
+
+static void clkdev_add_pci(void)
+{
+	struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
+	struct clk *clk_ext = kzalloc(sizeof(struct clk), GFP_KERNEL);
+
+	/* main pci clock */
+	if (clk) {
+		clk->cl.dev_id = "17000000.pci";
+		clk->cl.con_id = NULL;
+		clk->cl.clk = clk;
+		clk->rate = CLOCK_33M;
+		clk->rates = valid_pci_rates;
+		clk->enable = pci_enable;
+		clk->disable = pmu_disable;
+		clk->module = 0;
+		clk->bits = PMU_PCI;
+		clkdev_add(&clk->cl);
+	}
+
+	/* use internal/external bus clock */
+	if (clk_ext) {
+		clk_ext->cl.dev_id = "17000000.pci";
+		clk_ext->cl.con_id = "external";
+		clk_ext->cl.clk = clk_ext;
+		clk_ext->enable = pci_ext_enable;
+		clk_ext->disable = pci_ext_disable;
+		clkdev_add(&clk_ext->cl);
+	}
+}
+
+/* xway socs can generate clocks on gpio pins */
+static unsigned long valid_clkout_rates[4][5] = {
+	{CLOCK_32_768K, CLOCK_1_536M, CLOCK_2_5M, CLOCK_12M, 0},
+	{CLOCK_40M, CLOCK_12M, CLOCK_24M, CLOCK_48M, 0},
+	{CLOCK_25M, CLOCK_40M, CLOCK_30M, CLOCK_60M, 0},
+	{CLOCK_12M, CLOCK_50M, CLOCK_32_768K, CLOCK_25M, 0},
+};
+
+static void clkdev_add_clkout(void)
+{
+	int i;
+
+	for (i = 0; i < 4; i++) {
+		struct clk *clk;
+		char *name;
+
+		name = kzalloc(sizeof("clkout0"), GFP_KERNEL);
+		if (!name)
+			continue;
+		sprintf(name, "clkout%d", i);
+
+		clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
+		if (!clk) {
+			kfree(name);
+			continue;
+		}
+		clk->cl.dev_id = "1f103000.cgu";
+		clk->cl.con_id = name;
+		clk->cl.clk = clk;
+		clk->rate = 0;
+		clk->rates = valid_clkout_rates[i];
+		clk->enable = clkout_enable;
+		clk->module = i;
+		clkdev_add(&clk->cl);
+	}
+}
+
+/* bring up all register ranges that we need for basic system control */
+void __init ltq_soc_init(void)
+{
+	struct resource res_pmu, res_cgu, res_ebu;
+	struct device_node *np_pmu =
+			of_find_compatible_node(NULL, NULL, "lantiq,pmu-xway");
+	struct device_node *np_cgu =
+			of_find_compatible_node(NULL, NULL, "lantiq,cgu-xway");
+	struct device_node *np_ebu =
+			of_find_compatible_node(NULL, NULL, "lantiq,ebu-xway");
+
+	/* check if all the core register ranges are available */
+	if (!np_pmu || !np_cgu || !np_ebu)
+		panic("Failed to load core nodes from devicetree");
+
+	if (of_address_to_resource(np_pmu, 0, &res_pmu) ||
+			of_address_to_resource(np_cgu, 0, &res_cgu) ||
+			of_address_to_resource(np_ebu, 0, &res_ebu))
+		panic("Failed to get core resources");
+
+	if (!request_mem_region(res_pmu.start, resource_size(&res_pmu),
+				res_pmu.name) ||
+		!request_mem_region(res_cgu.start, resource_size(&res_cgu),
+				res_cgu.name) ||
+		!request_mem_region(res_ebu.start, resource_size(&res_ebu),
+				res_ebu.name))
+		pr_err("Failed to request core resources");
+
+	pmu_membase = ioremap_nocache(res_pmu.start, resource_size(&res_pmu));
+	ltq_cgu_membase = ioremap_nocache(res_cgu.start,
+						resource_size(&res_cgu));
+	ltq_ebu_membase = ioremap_nocache(res_ebu.start,
+						resource_size(&res_ebu));
+	if (!pmu_membase || !ltq_cgu_membase || !ltq_ebu_membase)
+		panic("Failed to remap core resources");
+
+	/* make sure to unprotect the memory region where flash is located */
+	ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_BUSCON0) & ~EBU_WRDIS, LTQ_EBU_BUSCON0);
+
+	/* add our generic xway clocks */
+	clkdev_add_pmu("10000000.fpi", NULL, 0, 0, PMU_FPI);
+	clkdev_add_pmu("1e100a00.gptu", NULL, 1, 0, PMU_GPT);
+	clkdev_add_pmu("1e100bb0.stp", NULL, 1, 0, PMU_STP);
+	clkdev_add_pmu("1e100c00.serial", NULL, 0, 0, PMU_ASC1);
+	clkdev_add_pmu("1e104100.dma", NULL, 1, 0, PMU_DMA);
+	clkdev_add_pmu("1e100800.spi", NULL, 1, 0, PMU_SPI);
+	clkdev_add_pmu("1e105300.ebu", NULL, 0, 0, PMU_EBU);
+	clkdev_add_clkout();
+
+	/* add the soc dependent clocks */
+	if (of_machine_is_compatible("lantiq,vr9")) {
+		ifccr = CGU_IFCCR_VR9;
+		pcicr = CGU_PCICR_VR9;
+	} else {
+		clkdev_add_pmu("1e180000.etop", NULL, 1, 0, PMU_PPE);
+	}
+
+	if (!of_machine_is_compatible("lantiq,ase"))
+		clkdev_add_pci();
+
+	if (of_machine_is_compatible("lantiq,grx390") ||
+	    of_machine_is_compatible("lantiq,ar10")) {
+		clkdev_add_pmu("1f203018.usb2-phy", "phy", 1, 2, PMU_ANALOG_USB0_P);
+		clkdev_add_pmu("1f203034.usb2-phy", "phy", 1, 2, PMU_ANALOG_USB1_P);
+		/* rc 0 */
+		clkdev_add_pmu("1d900000.pcie", "phy", 1, 2, PMU_ANALOG_PCIE0_P);
+		clkdev_add_pmu("1d900000.pcie", "msi", 1, 1, PMU1_PCIE_MSI);
+		clkdev_add_pmu("1d900000.pcie", "pdi", 1, 1, PMU1_PCIE_PDI);
+		clkdev_add_pmu("1d900000.pcie", "ctl", 1, 1, PMU1_PCIE_CTL);
+		/* rc 1 */
+		clkdev_add_pmu("19000000.pcie", "phy", 1, 2, PMU_ANALOG_PCIE1_P);
+		clkdev_add_pmu("19000000.pcie", "msi", 1, 1, PMU1_PCIE1_MSI);
+		clkdev_add_pmu("19000000.pcie", "pdi", 1, 1, PMU1_PCIE1_PDI);
+		clkdev_add_pmu("19000000.pcie", "ctl", 1, 1, PMU1_PCIE1_CTL);
+	}
+
+	if (of_machine_is_compatible("lantiq,ase")) {
+		if (ltq_cgu_r32(CGU_SYS) & (1 << 5))
+			clkdev_add_static(CLOCK_266M, CLOCK_133M,
+						CLOCK_133M, CLOCK_266M);
+		else
+			clkdev_add_static(CLOCK_133M, CLOCK_133M,
+						CLOCK_133M, CLOCK_133M);
+		clkdev_add_pmu("1e101000.usb", "otg", 1, 0, PMU_USB0);
+		clkdev_add_pmu("1f203018.usb2-phy", "phy", 1, 0, PMU_USB0_P);
+		clkdev_add_pmu("1e180000.etop", "ppe", 1, 0, PMU_PPE);
+		clkdev_add_cgu("1e180000.etop", "ephycgu", CGU_EPHY);
+		clkdev_add_pmu("1e180000.etop", "ephy", 1, 0, PMU_EPHY);
+		clkdev_add_pmu("1e103000.sdio", NULL, 1, 0, PMU_ASE_SDIO);
+		clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);
+	} else if (of_machine_is_compatible("lantiq,grx390")) {
+		clkdev_add_static(ltq_grx390_cpu_hz(), ltq_grx390_fpi_hz(),
+				  ltq_grx390_fpi_hz(), ltq_grx390_pp32_hz());
+		clkdev_add_pmu("1e101000.usb", "otg", 1, 0, PMU_USB0);
+		clkdev_add_pmu("1e106000.usb", "otg", 1, 0, PMU_USB1);
+		/* rc 2 */
+		clkdev_add_pmu("1a800000.pcie", "phy", 1, 2, PMU_ANALOG_PCIE2_P);
+		clkdev_add_pmu("1a800000.pcie", "msi", 1, 1, PMU1_PCIE2_MSI);
+		clkdev_add_pmu("1a800000.pcie", "pdi", 1, 1, PMU1_PCIE2_PDI);
+		clkdev_add_pmu("1a800000.pcie", "ctl", 1, 1, PMU1_PCIE2_CTL);
+		clkdev_add_pmu("1e108000.eth", NULL, 0, 0, PMU_SWITCH | PMU_PPE_DP);
+		clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF);
+		clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU);
+	} else if (of_machine_is_compatible("lantiq,ar10")) {
+		clkdev_add_static(ltq_ar10_cpu_hz(), ltq_ar10_fpi_hz(),
+				  ltq_ar10_fpi_hz(), ltq_ar10_pp32_hz());
+		clkdev_add_pmu("1e101000.usb", "otg", 1, 0, PMU_USB0);
+		clkdev_add_pmu("1e106000.usb", "otg", 1, 0, PMU_USB1);
+		clkdev_add_pmu("1e108000.eth", NULL, 0, 0, PMU_SWITCH |
+			       PMU_PPE_DP | PMU_PPE_TC);
+		clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF);
+		clkdev_add_pmu("1f203020.gphy", NULL, 1, 0, PMU_GPHY);
+		clkdev_add_pmu("1f203068.gphy", NULL, 1, 0, PMU_GPHY);
+		clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU);
+		clkdev_add_pmu("1e116000.mei", "afe", 1, 2, PMU_ANALOG_DSL_AFE);
+		clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);
+	} else if (of_machine_is_compatible("lantiq,vr9")) {
+		clkdev_add_static(ltq_vr9_cpu_hz(), ltq_vr9_fpi_hz(),
+				ltq_vr9_fpi_hz(), ltq_vr9_pp32_hz());
+		clkdev_add_pmu("1f203018.usb2-phy", "phy", 1, 0, PMU_USB0_P);
+		clkdev_add_pmu("1e101000.usb", "otg", 1, 0, PMU_USB0 | PMU_AHBM);
+		clkdev_add_pmu("1f203034.usb2-phy", "phy", 1, 0, PMU_USB1_P);
+		clkdev_add_pmu("1e106000.usb", "otg", 1, 0, PMU_USB1 | PMU_AHBM);
+		clkdev_add_pmu("1d900000.pcie", "phy", 1, 1, PMU1_PCIE_PHY);
+		clkdev_add_pmu("1d900000.pcie", "bus", 1, 0, PMU_PCIE_CLK);
+		clkdev_add_pmu("1d900000.pcie", "msi", 1, 1, PMU1_PCIE_MSI);
+		clkdev_add_pmu("1d900000.pcie", "pdi", 1, 1, PMU1_PCIE_PDI);
+		clkdev_add_pmu("1d900000.pcie", "ctl", 1, 1, PMU1_PCIE_CTL);
+		clkdev_add_pmu(NULL, "ahb", 1, 0, PMU_AHBM | PMU_AHBS);
+
+		clkdev_add_pmu("1da00000.usif", "NULL", 1, 0, PMU_USIF);
+		clkdev_add_pmu("1e108000.eth", NULL, 0, 0,
+				PMU_SWITCH | PMU_PPE_DPLUS | PMU_PPE_DPLUM |
+				PMU_PPE_EMA | PMU_PPE_TC | PMU_PPE_SLL01 |
+				PMU_PPE_QSB | PMU_PPE_TOP);
+		clkdev_add_pmu("1f203020.gphy", NULL, 0, 0, PMU_GPHY);
+		clkdev_add_pmu("1f203068.gphy", NULL, 0, 0, PMU_GPHY);
+		clkdev_add_pmu("1e103000.sdio", NULL, 1, 0, PMU_SDIO);
+		clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU);
+		clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);
+	} else if (of_machine_is_compatible("lantiq,ar9")) {
+		clkdev_add_static(ltq_ar9_cpu_hz(), ltq_ar9_fpi_hz(),
+				ltq_ar9_fpi_hz(), CLOCK_250M);
+		clkdev_add_pmu("1f203018.usb2-phy", "phy", 1, 0, PMU_USB0_P);
+		clkdev_add_pmu("1e101000.usb", "otg", 1, 0, PMU_USB0 | PMU_AHBM);
+		clkdev_add_pmu("1f203034.usb2-phy", "phy", 1, 0, PMU_USB1_P);
+		clkdev_add_pmu("1e106000.usb", "otg", 1, 0, PMU_USB1 | PMU_AHBM);
+		clkdev_add_pmu("1e180000.etop", "switch", 1, 0, PMU_SWITCH);
+		clkdev_add_pmu("1e103000.sdio", NULL, 1, 0, PMU_SDIO);
+		clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU);
+		clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);
+		clkdev_add_pmu("1e100400.serial", NULL, 1, 0, PMU_ASC0);
+	} else {
+		clkdev_add_static(ltq_danube_cpu_hz(), ltq_danube_fpi_hz(),
+				ltq_danube_fpi_hz(), ltq_danube_pp32_hz());
+		clkdev_add_pmu("1e101000.usb", "otg", 1, 0, PMU_USB0 | PMU_AHBM);
+		clkdev_add_pmu("1f203018.usb2-phy", "phy", 1, 0, PMU_USB0_P);
+		clkdev_add_pmu("1e103000.sdio", NULL, 1, 0, PMU_SDIO);
+		clkdev_add_pmu("1e103100.deu", NULL, 1, 0, PMU_DEU);
+		clkdev_add_pmu("1e116000.mei", "dfe", 1, 0, PMU_DFE);
+		clkdev_add_pmu("1e100400.serial", NULL, 1, 0, PMU_ASC0);
+	}
+}
diff --git a/arch/mips/lantiq/xway/vmmc.c b/arch/mips/lantiq/xway/vmmc.c
new file mode 100644
index 000000000..577ec81b5
--- /dev/null
+++ b/arch/mips/lantiq/xway/vmmc.c
@@ -0,0 +1,66 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2012 John Crispin <john@phrozen.org>
+ */
+
+#include <linux/export.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/dma-mapping.h>
+
+#include <lantiq_soc.h>
+
+static unsigned int *cp1_base;
+
+unsigned int *ltq_get_cp1_base(void)
+{
+	if (!cp1_base)
+		panic("no cp1 base was set\n");
+
+	return cp1_base;
+}
+EXPORT_SYMBOL(ltq_get_cp1_base);
+
+static int vmmc_probe(struct platform_device *pdev)
+{
+#define CP1_SIZE       (1 << 20)
+	int gpio_count;
+	dma_addr_t dma;
+
+	cp1_base =
+		(void *) CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE,
+						    &dma, GFP_ATOMIC));
+
+	gpio_count = of_gpio_count(pdev->dev.of_node);
+	while (gpio_count > 0) {
+		enum of_gpio_flags flags;
+		int gpio = of_get_gpio_flags(pdev->dev.of_node,
+					     --gpio_count, &flags);
+		if (gpio_request(gpio, "vmmc-relay"))
+			continue;
+		dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
+		gpio_direction_output(gpio,
+				      (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
+	}
+
+	dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
+
+	return 0;
+}
+
+static const struct of_device_id vmmc_match[] = {
+	{ .compatible = "lantiq,vmmc-xway" },
+	{},
+};
+
+static struct platform_driver vmmc_driver = {
+	.probe = vmmc_probe,
+	.driver = {
+		.name = "lantiq,vmmc",
+		.of_match_table = vmmc_match,
+	},
+};
+builtin_platform_driver(vmmc_driver);