Adding upstream version 4.19.249.upstream/4.19.249

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

3 files changed, 385 insertions, 0 deletions

diff --git a/arch/arm/mach-versatile/Kconfig b/arch/arm/mach-versatile/Kconfig
new file mode 100644
index 000000000..f5c275434
--- /dev/null
+++ b/arch/arm/mach-versatile/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+config ARCH_VERSATILE
+	bool "ARM Ltd. Versatile family"
+	depends on ARCH_MULTI_V5
+	select ARM_AMBA
+	select ARM_TIMER_SP804
+	select ARM_VIC
+	select CLKSRC_VERSATILE
+	select COMMON_CLK_VERSATILE
+	select CPU_ARM926T
+	select ICST
+	select MFD_SYSCON
+	select PLAT_VERSATILE
+	select POWER_RESET
+	select POWER_RESET_VERSATILE
+	select VERSATILE_FPGA_IRQ
+	help
+	  This enables support for ARM Ltd Versatile board.
+
diff --git a/arch/arm/mach-versatile/Makefile b/arch/arm/mach-versatile/Makefile
new file mode 100644
index 000000000..41b124b51
--- /dev/null
+++ b/arch/arm/mach-versatile/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y					:= versatile_dt.o
diff --git a/arch/arm/mach-versatile/versatile_dt.c b/arch/arm/mach-versatile/versatile_dt.c
new file mode 100644
index 000000000..3c8d39c12
--- /dev/null
+++ b/arch/arm/mach-versatile/versatile_dt.c
@@ -0,0 +1,361 @@
+/*
+ * Versatile board support using the device tree
+ *
+ *  Copyright (C) 2010 Secret Lab Technologies Ltd.
+ *  Copyright (C) 2009 Jeremy Kerr <jeremy.kerr@canonical.com>
+ *  Copyright (C) 2004 ARM Limited
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/clcd.h>
+#include <linux/platform_data/video-clcd-versatile.h>
+#include <linux/amba/mmci.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+/* macro to get at MMIO space when running virtually */
+#define IO_ADDRESS(x)		(((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + 0xf0000000)
+#define __io_address(n)		((void __iomem __force *)IO_ADDRESS(n))
+
+/*
+ * ------------------------------------------------------------------------
+ *  Versatile Registers
+ * ------------------------------------------------------------------------
+ */
+#define VERSATILE_SYS_PCICTL_OFFSET           0x44
+#define VERSATILE_SYS_MCI_OFFSET              0x48
+#define VERSATILE_SYS_CLCD_OFFSET             0x50
+
+/*
+ * VERSATILE peripheral addresses
+ */
+#define VERSATILE_MMCI0_BASE           0x10005000	/* MMC interface */
+#define VERSATILE_MMCI1_BASE           0x1000B000	/* MMC Interface */
+#define VERSATILE_CLCD_BASE            0x10120000	/* CLCD */
+#define VERSATILE_SCTL_BASE            0x101E0000	/* System controller */
+#define VERSATILE_IB2_BASE             0x24000000	/* IB2 module */
+#define VERSATILE_IB2_CTL_BASE		(VERSATILE_IB2_BASE + 0x03000000)
+
+/*
+ * System controller bit assignment
+ */
+#define VERSATILE_REFCLK	0
+#define VERSATILE_TIMCLK	1
+
+#define VERSATILE_TIMER1_EnSel	15
+#define VERSATILE_TIMER2_EnSel	17
+#define VERSATILE_TIMER3_EnSel	19
+#define VERSATILE_TIMER4_EnSel	21
+
+static void __iomem *versatile_sys_base;
+static void __iomem *versatile_ib2_ctrl;
+
+unsigned int mmc_status(struct device *dev)
+{
+	struct amba_device *adev = container_of(dev, struct amba_device, dev);
+	u32 mask;
+
+	if (adev->res.start == VERSATILE_MMCI0_BASE)
+		mask = 1;
+	else
+		mask = 2;
+
+	return readl(versatile_sys_base + VERSATILE_SYS_MCI_OFFSET) & mask;
+}
+
+static struct mmci_platform_data mmc0_plat_data = {
+	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
+	.status		= mmc_status,
+	.gpio_wp	= -1,
+	.gpio_cd	= -1,
+};
+
+static struct mmci_platform_data mmc1_plat_data = {
+	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
+	.status		= mmc_status,
+	.gpio_wp	= -1,
+	.gpio_cd	= -1,
+};
+
+/*
+ * CLCD support.
+ */
+#define SYS_CLCD_MODE_MASK	(3 << 0)
+#define SYS_CLCD_MODE_888	(0 << 0)
+#define SYS_CLCD_MODE_5551	(1 << 0)
+#define SYS_CLCD_MODE_565_RLSB	(2 << 0)
+#define SYS_CLCD_MODE_565_BLSB	(3 << 0)
+#define SYS_CLCD_NLCDIOON	(1 << 2)
+#define SYS_CLCD_VDDPOSSWITCH	(1 << 3)
+#define SYS_CLCD_PWR3V5SWITCH	(1 << 4)
+#define SYS_CLCD_ID_MASK	(0x1f << 8)
+#define SYS_CLCD_ID_SANYO_3_8	(0x00 << 8)
+#define SYS_CLCD_ID_UNKNOWN_8_4	(0x01 << 8)
+#define SYS_CLCD_ID_EPSON_2_2	(0x02 << 8)
+#define SYS_CLCD_ID_SANYO_2_5	(0x07 << 8)
+#define SYS_CLCD_ID_VGA		(0x1f << 8)
+
+static bool is_sanyo_2_5_lcd;
+
+/*
+ * Disable all display connectors on the interface module.
+ */
+static void versatile_clcd_disable(struct clcd_fb *fb)
+{
+	void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+	u32 val;
+
+	val = readl(sys_clcd);
+	val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
+	writel(val, sys_clcd);
+
+	/*
+	 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
+	 */
+	if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
+		unsigned long ctrl;
+
+		ctrl = readl(versatile_ib2_ctrl);
+		ctrl &= ~0x01;
+		writel(ctrl, versatile_ib2_ctrl);
+	}
+}
+
+/*
+ * Enable the relevant connector on the interface module.
+ */
+static void versatile_clcd_enable(struct clcd_fb *fb)
+{
+	struct fb_var_screeninfo *var = &fb->fb.var;
+	void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+	u32 val;
+
+	val = readl(sys_clcd);
+	val &= ~SYS_CLCD_MODE_MASK;
+
+	switch (var->green.length) {
+	case 5:
+		val |= SYS_CLCD_MODE_5551;
+		break;
+	case 6:
+		if (var->red.offset == 0)
+			val |= SYS_CLCD_MODE_565_RLSB;
+		else
+			val |= SYS_CLCD_MODE_565_BLSB;
+		break;
+	case 8:
+		val |= SYS_CLCD_MODE_888;
+		break;
+	}
+
+	/*
+	 * Set the MUX
+	 */
+	writel(val, sys_clcd);
+
+	/*
+	 * And now enable the PSUs
+	 */
+	val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
+	writel(val, sys_clcd);
+
+	/*
+	 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
+	 */
+	if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
+		unsigned long ctrl;
+
+		ctrl = readl(versatile_ib2_ctrl);
+		ctrl |= 0x01;
+		writel(ctrl, versatile_ib2_ctrl);
+	}
+}
+
+/*
+ * Detect which LCD panel is connected, and return the appropriate
+ * clcd_panel structure.  Note: we do not have any information on
+ * the required timings for the 8.4in panel, so we presently assume
+ * VGA timings.
+ */
+static int versatile_clcd_setup(struct clcd_fb *fb)
+{
+	void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+	const char *panel_name;
+	u32 val;
+
+	is_sanyo_2_5_lcd = false;
+
+	val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
+	if (val == SYS_CLCD_ID_SANYO_3_8)
+		panel_name = "Sanyo TM38QV67A02A";
+	else if (val == SYS_CLCD_ID_SANYO_2_5) {
+		panel_name = "Sanyo QVGA Portrait";
+		is_sanyo_2_5_lcd = true;
+	} else if (val == SYS_CLCD_ID_EPSON_2_2)
+		panel_name = "Epson L2F50113T00";
+	else if (val == SYS_CLCD_ID_VGA)
+		panel_name = "VGA";
+	else {
+		printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
+			val);
+		panel_name = "VGA";
+	}
+
+	fb->panel = versatile_clcd_get_panel(panel_name);
+	if (!fb->panel)
+		return -EINVAL;
+
+	return versatile_clcd_setup_dma(fb, SZ_1M);
+}
+
+static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs)
+{
+	clcdfb_decode(fb, regs);
+
+	/* Always clear BGR for RGB565: we do the routing externally */
+	if (fb->fb.var.green.length == 6)
+		regs->cntl &= ~CNTL_BGR;
+}
+
+static struct clcd_board clcd_plat_data = {
+	.name		= "Versatile",
+	.caps		= CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
+	.check		= clcdfb_check,
+	.decode		= versatile_clcd_decode,
+	.disable	= versatile_clcd_disable,
+	.enable		= versatile_clcd_enable,
+	.setup		= versatile_clcd_setup,
+	.mmap		= versatile_clcd_mmap_dma,
+	.remove		= versatile_clcd_remove_dma,
+};
+
+/*
+ * Lookup table for attaching a specific name and platform_data pointer to
+ * devices as they get created by of_platform_populate().  Ideally this table
+ * would not exist, but the current clock implementation depends on some devices
+ * having a specific name.
+ */
+struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", &mmc0_plat_data),
+	OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", &mmc1_plat_data),
+	OF_DEV_AUXDATA("arm,primecell", VERSATILE_CLCD_BASE, "dev:20", &clcd_plat_data),
+	{}
+};
+
+static struct map_desc versatile_io_desc[] __initdata __maybe_unused = {
+	{
+		.virtual	=  IO_ADDRESS(VERSATILE_SCTL_BASE),
+		.pfn		= __phys_to_pfn(VERSATILE_SCTL_BASE),
+		.length		= SZ_4K * 9,
+		.type		= MT_DEVICE
+	}
+};
+
+static void __init versatile_map_io(void)
+{
+	debug_ll_io_init();
+	iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
+}
+
+static void __init versatile_init_early(void)
+{
+	u32 val;
+
+	/*
+	 * set clock frequency:
+	 *	VERSATILE_REFCLK is 32KHz
+	 *	VERSATILE_TIMCLK is 1MHz
+	 */
+	val = readl(__io_address(VERSATILE_SCTL_BASE));
+	writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
+	       (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
+	       (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
+	       (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
+	       __io_address(VERSATILE_SCTL_BASE));
+}
+
+static void __init versatile_dt_pci_init(void)
+{
+	u32 val;
+	struct device_node *np;
+	struct property *newprop;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,versatile-pci");
+	if (!np)
+		return;
+
+	/* Check if PCI backplane is detected */
+	val = readl(versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
+	if (val & 1) {
+		/*
+		 * Enable PCI accesses. Note that the documentaton is
+		 * inconsistent whether or not this is needed, but the old
+		 * driver had it so we will keep it.
+		 */
+		writel(1, versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
+		return;
+	}
+
+	newprop = kzalloc(sizeof(*newprop), GFP_KERNEL);
+	if (!newprop)
+		return;
+
+	newprop->name = kstrdup("status", GFP_KERNEL);
+	newprop->value = kstrdup("disabled", GFP_KERNEL);
+	newprop->length = sizeof("disabled");
+	of_update_property(np, newprop);
+
+	pr_info("Not plugged into PCI backplane!\n");
+}
+
+static void __init versatile_dt_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,core-module-versatile");
+	if (np)
+		versatile_sys_base = of_iomap(np, 0);
+	WARN_ON(!versatile_sys_base);
+
+	versatile_ib2_ctrl = ioremap(VERSATILE_IB2_CTL_BASE, SZ_4K);
+
+	versatile_dt_pci_init();
+
+	of_platform_default_populate(NULL, versatile_auxdata_lookup, NULL);
+}
+
+static const char *const versatile_dt_match[] __initconst = {
+	"arm,versatile-ab",
+	"arm,versatile-pb",
+	NULL,
+};
+
+DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)")
+	.map_io		= versatile_map_io,
+	.init_early	= versatile_init_early,
+	.init_machine	= versatile_dt_init,
+	.dt_compat	= versatile_dt_match,
+MACHINE_END