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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/mach-mvebu/kirkwood.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-mvebu/kirkwood.c')
-rw-r--r--arch/arm/mach-mvebu/kirkwood.c191
1 files changed, 191 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/kirkwood.c b/arch/arm/mach-mvebu/kirkwood.c
new file mode 100644
index 000000000..8ff34753e
--- /dev/null
+++ b/arch/arm/mach-mvebu/kirkwood.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
+ *
+ * arch/arm/mach-mvebu/kirkwood.c
+ *
+ * Flattened Device Tree board initialization
+ */
+
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mbus.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_net.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <asm/hardware/cache-feroceon-l2.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include "kirkwood.h"
+#include "kirkwood-pm.h"
+#include "common.h"
+
+static struct resource kirkwood_cpufreq_resources[] = {
+ [0] = {
+ .start = CPU_CONTROL_PHYS,
+ .end = CPU_CONTROL_PHYS + 3,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device kirkwood_cpufreq_device = {
+ .name = "kirkwood-cpufreq",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(kirkwood_cpufreq_resources),
+ .resource = kirkwood_cpufreq_resources,
+};
+
+static void __init kirkwood_cpufreq_init(void)
+{
+ platform_device_register(&kirkwood_cpufreq_device);
+}
+
+static struct resource kirkwood_cpuidle_resource[] = {
+ {
+ .flags = IORESOURCE_MEM,
+ .start = DDR_OPERATION_BASE,
+ .end = DDR_OPERATION_BASE + 3,
+ },
+};
+
+static struct platform_device kirkwood_cpuidle = {
+ .name = "kirkwood_cpuidle",
+ .id = -1,
+ .resource = kirkwood_cpuidle_resource,
+ .num_resources = 1,
+};
+
+static void __init kirkwood_cpuidle_init(void)
+{
+ platform_device_register(&kirkwood_cpuidle);
+}
+
+#define MV643XX_ETH_MAC_ADDR_LOW 0x0414
+#define MV643XX_ETH_MAC_ADDR_HIGH 0x0418
+
+static void __init kirkwood_dt_eth_fixup(void)
+{
+ struct device_node *np;
+
+ /*
+ * The ethernet interfaces forget the MAC address assigned by u-boot
+ * if the clocks are turned off. Usually, u-boot on kirkwood boards
+ * has no DT support to properly set local-mac-address property.
+ * As a workaround, we get the MAC address from mv643xx_eth registers
+ * and update the port device node if no valid MAC address is set.
+ */
+ for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") {
+ struct device_node *pnp = of_get_parent(np);
+ struct clk *clk;
+ struct property *pmac;
+ u8 tmpmac[ETH_ALEN];
+ void __iomem *io;
+ u8 *macaddr;
+ u32 reg;
+
+ if (!pnp)
+ continue;
+
+ /* skip disabled nodes or nodes with valid MAC address*/
+ if (!of_device_is_available(pnp) ||
+ !of_get_mac_address(np, tmpmac))
+ goto eth_fixup_skip;
+
+ clk = of_clk_get(pnp, 0);
+ if (IS_ERR(clk))
+ goto eth_fixup_skip;
+
+ io = of_iomap(pnp, 0);
+ if (!io)
+ goto eth_fixup_no_map;
+
+ /* ensure port clock is not gated to not hang CPU */
+ clk_prepare_enable(clk);
+
+ /* store MAC address register contents in local-mac-address */
+ pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL);
+ if (!pmac)
+ goto eth_fixup_no_mem;
+
+ pmac->value = pmac + 1;
+ pmac->length = 6;
+ pmac->name = kstrdup("local-mac-address", GFP_KERNEL);
+ if (!pmac->name) {
+ kfree(pmac);
+ goto eth_fixup_no_mem;
+ }
+
+ macaddr = pmac->value;
+ reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH);
+ macaddr[0] = (reg >> 24) & 0xff;
+ macaddr[1] = (reg >> 16) & 0xff;
+ macaddr[2] = (reg >> 8) & 0xff;
+ macaddr[3] = reg & 0xff;
+
+ reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW);
+ macaddr[4] = (reg >> 8) & 0xff;
+ macaddr[5] = reg & 0xff;
+
+ of_update_property(np, pmac);
+
+eth_fixup_no_mem:
+ iounmap(io);
+ clk_disable_unprepare(clk);
+eth_fixup_no_map:
+ clk_put(clk);
+eth_fixup_skip:
+ of_node_put(pnp);
+ }
+}
+
+/*
+ * Disable propagation of mbus errors to the CPU local bus, as this
+ * causes mbus errors (which can occur for example for PCI aborts) to
+ * throw CPU aborts, which we're not set up to deal with.
+ */
+static void kirkwood_disable_mbus_error_propagation(void)
+{
+ void __iomem *cpu_config;
+
+ cpu_config = ioremap(CPU_CONFIG_PHYS, 4);
+ writel(readl(cpu_config) & ~CPU_CONFIG_ERROR_PROP, cpu_config);
+}
+
+static struct of_dev_auxdata auxdata[] __initdata = {
+ OF_DEV_AUXDATA("marvell,kirkwood-audio", 0xf10a0000,
+ "mvebu-audio", NULL),
+ { /* sentinel */ }
+};
+
+static void __init kirkwood_dt_init(void)
+{
+ kirkwood_disable_mbus_error_propagation();
+
+ BUG_ON(mvebu_mbus_dt_init(false));
+
+#ifdef CONFIG_CACHE_FEROCEON_L2
+ feroceon_of_init();
+#endif
+ kirkwood_cpufreq_init();
+ kirkwood_cpuidle_init();
+
+ kirkwood_pm_init();
+ kirkwood_dt_eth_fixup();
+
+ of_platform_default_populate(NULL, auxdata, NULL);
+}
+
+static const char * const kirkwood_dt_board_compat[] __initconst = {
+ "marvell,kirkwood",
+ NULL
+};
+
+DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
+ /* Maintainer: Jason Cooper <jason@lakedaemon.net> */
+ .init_machine = kirkwood_dt_init,
+ .restart = mvebu_restart,
+ .dt_compat = kirkwood_dt_board_compat,
+MACHINE_END