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-rw-r--r--arch/mips/ralink/Kconfig32
-rw-r--r--arch/mips/ralink/Makefile7
-rw-r--r--arch/mips/ralink/Platform19
-rw-r--r--arch/mips/ralink/cevt-rt3352.c145
-rw-r--r--arch/mips/ralink/clk.c3
-rw-r--r--arch/mips/ralink/common.h13
-rw-r--r--arch/mips/ralink/dts/Makefile3
-rw-r--r--arch/mips/ralink/dts/mt7620a.dtsi58
-rw-r--r--arch/mips/ralink/dts/mt7620a_eval.dts17
-rw-r--r--arch/mips/ralink/dts/rt2880.dtsi58
-rw-r--r--arch/mips/ralink/dts/rt2880_eval.dts47
-rw-r--r--arch/mips/ralink/dts/rt3050.dtsi62
-rw-r--r--arch/mips/ralink/dts/rt3052_eval.dts17
-rw-r--r--arch/mips/ralink/dts/rt3883.dtsi58
-rw-r--r--arch/mips/ralink/dts/rt3883_eval.dts17
-rw-r--r--arch/mips/ralink/early_printk.c4
-rw-r--r--arch/mips/ralink/irq.c7
-rw-r--r--arch/mips/ralink/mt7620.c389
-rw-r--r--arch/mips/ralink/of.c46
-rw-r--r--arch/mips/ralink/reset.c62
-rw-r--r--arch/mips/ralink/rt288x.c143
-rw-r--r--arch/mips/ralink/rt305x.c72
-rw-r--r--arch/mips/ralink/rt3883.c246
-rw-r--r--arch/mips/ralink/timer.c185
24 files changed, 1609 insertions, 101 deletions
diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig
index a0b0197cab0..4a296655f44 100644
--- a/arch/mips/ralink/Kconfig
+++ b/arch/mips/ralink/Kconfig
@@ -1,16 +1,32 @@
if RALINK
+config CLKEVT_RT3352
+ bool
+ depends on SOC_RT305X || SOC_MT7620
+ default y
+ select CLKSRC_OF
+ select CLKSRC_MMIO
+
choice
prompt "Ralink SoC selection"
default SOC_RT305X
help
Select Ralink MIPS SoC type.
+ config SOC_RT288X
+ bool "RT288x"
+ select MIPS_L1_CACHE_SHIFT_4
+
config SOC_RT305X
bool "RT305x"
select USB_ARCH_HAS_HCD
- select USB_ARCH_HAS_OHCI
- select USB_ARCH_HAS_EHCI
+
+ config SOC_RT3883
+ bool "RT3883"
+ select HW_HAS_PCI
+
+ config SOC_MT7620
+ bool "MT7620"
endchoice
@@ -23,10 +39,22 @@ choice
config DTB_RT_NONE
bool "None"
+ config DTB_RT2880_EVAL
+ bool "RT2880 eval kit"
+ depends on SOC_RT288X
+
config DTB_RT305X_EVAL
bool "RT305x eval kit"
depends on SOC_RT305X
+ config DTB_RT3883_EVAL
+ bool "RT3883 eval kit"
+ depends on SOC_RT3883
+
+ config DTB_MT7620A_EVAL
+ bool "MT7620A eval kit"
+ depends on SOC_MT7620
+
endchoice
endif
diff --git a/arch/mips/ralink/Makefile b/arch/mips/ralink/Makefile
index 939757f0e71..98ae349827b 100644
--- a/arch/mips/ralink/Makefile
+++ b/arch/mips/ralink/Makefile
@@ -6,9 +6,14 @@
# Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
# Copyright (C) 2013 John Crispin <blogic@openwrt.org>
-obj-y := prom.o of.o reset.o clk.o irq.o
+obj-y := prom.o of.o reset.o clk.o irq.o timer.o
+obj-$(CONFIG_CLKEVT_RT3352) += cevt-rt3352.o
+
+obj-$(CONFIG_SOC_RT288X) += rt288x.o
obj-$(CONFIG_SOC_RT305X) += rt305x.o
+obj-$(CONFIG_SOC_RT3883) += rt3883.o
+obj-$(CONFIG_SOC_MT7620) += mt7620.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
diff --git a/arch/mips/ralink/Platform b/arch/mips/ralink/Platform
index 6babd65765e..6d9c8c499f9 100644
--- a/arch/mips/ralink/Platform
+++ b/arch/mips/ralink/Platform
@@ -5,6 +5,25 @@ core-$(CONFIG_RALINK) += arch/mips/ralink/
cflags-$(CONFIG_RALINK) += -I$(srctree)/arch/mips/include/asm/mach-ralink
#
+# Ralink RT288x
+#
+load-$(CONFIG_SOC_RT288X) += 0xffffffff88000000
+cflags-$(CONFIG_SOC_RT288X) += -I$(srctree)/arch/mips/include/asm/mach-ralink/rt288x
+
+#
# Ralink RT305x
#
load-$(CONFIG_SOC_RT305X) += 0xffffffff80000000
+cflags-$(CONFIG_SOC_RT305X) += -I$(srctree)/arch/mips/include/asm/mach-ralink/rt305x
+
+#
+# Ralink RT3883
+#
+load-$(CONFIG_SOC_RT3883) += 0xffffffff80000000
+cflags-$(CONFIG_SOC_RT3883) += -I$(srctree)/arch/mips/include/asm/mach-ralink/rt3883
+
+#
+# Ralink MT7620
+#
+load-$(CONFIG_SOC_MT7620) += 0xffffffff80000000
+cflags-$(CONFIG_SOC_MT7620) += -I$(srctree)/arch/mips/include/asm/mach-ralink/mt7620
diff --git a/arch/mips/ralink/cevt-rt3352.c b/arch/mips/ralink/cevt-rt3352.c
new file mode 100644
index 00000000000..24bf057a361
--- /dev/null
+++ b/arch/mips/ralink/cevt-rt3352.c
@@ -0,0 +1,145 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2013 by John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/clockchips.h>
+#include <linux/clocksource.h>
+#include <linux/interrupt.h>
+#include <linux/reset.h>
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+
+#include <asm/mach-ralink/ralink_regs.h>
+
+#define SYSTICK_FREQ (50 * 1000)
+
+#define SYSTICK_CONFIG 0x00
+#define SYSTICK_COMPARE 0x04
+#define SYSTICK_COUNT 0x08
+
+/* route systick irq to mips irq 7 instead of the r4k-timer */
+#define CFG_EXT_STK_EN 0x2
+/* enable the counter */
+#define CFG_CNT_EN 0x1
+
+struct systick_device {
+ void __iomem *membase;
+ struct clock_event_device dev;
+ int irq_requested;
+ int freq_scale;
+};
+
+static void systick_set_clock_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt);
+
+static int systick_next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ struct systick_device *sdev;
+ u32 count;
+
+ sdev = container_of(evt, struct systick_device, dev);
+ count = ioread32(sdev->membase + SYSTICK_COUNT);
+ count = (count + delta) % SYSTICK_FREQ;
+ iowrite32(count + delta, sdev->membase + SYSTICK_COMPARE);
+
+ return 0;
+}
+
+static void systick_event_handler(struct clock_event_device *dev)
+{
+ /* noting to do here */
+}
+
+static irqreturn_t systick_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *dev = (struct clock_event_device *) dev_id;
+
+ dev->event_handler(dev);
+
+ return IRQ_HANDLED;
+}
+
+static struct systick_device systick = {
+ .dev = {
+ /*
+ * cevt-r4k uses 300, make sure systick
+ * gets used if available
+ */
+ .rating = 310,
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .set_next_event = systick_next_event,
+ .set_mode = systick_set_clock_mode,
+ .event_handler = systick_event_handler,
+ },
+};
+
+static struct irqaction systick_irqaction = {
+ .handler = systick_interrupt,
+ .flags = IRQF_PERCPU | IRQF_TIMER,
+ .dev_id = &systick.dev,
+};
+
+static void systick_set_clock_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ struct systick_device *sdev;
+
+ sdev = container_of(evt, struct systick_device, dev);
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_ONESHOT:
+ if (!sdev->irq_requested)
+ setup_irq(systick.dev.irq, &systick_irqaction);
+ sdev->irq_requested = 1;
+ iowrite32(CFG_EXT_STK_EN | CFG_CNT_EN,
+ systick.membase + SYSTICK_CONFIG);
+ break;
+
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ if (sdev->irq_requested)
+ free_irq(systick.dev.irq, &systick_irqaction);
+ sdev->irq_requested = 0;
+ iowrite32(0, systick.membase + SYSTICK_CONFIG);
+ break;
+
+ default:
+ pr_err("%s: Unhandeled mips clock_mode\n", systick.dev.name);
+ break;
+ }
+}
+
+static void __init ralink_systick_init(struct device_node *np)
+{
+ systick.membase = of_iomap(np, 0);
+ if (!systick.membase)
+ return;
+
+ systick_irqaction.name = np->name;
+ systick.dev.name = np->name;
+ clockevents_calc_mult_shift(&systick.dev, SYSTICK_FREQ, 60);
+ systick.dev.max_delta_ns = clockevent_delta2ns(0x7fff, &systick.dev);
+ systick.dev.min_delta_ns = clockevent_delta2ns(0x3, &systick.dev);
+ systick.dev.irq = irq_of_parse_and_map(np, 0);
+ if (!systick.dev.irq) {
+ pr_err("%s: request_irq failed", np->name);
+ return;
+ }
+
+ clocksource_mmio_init(systick.membase + SYSTICK_COUNT, np->name,
+ SYSTICK_FREQ, 301, 16, clocksource_mmio_readl_up);
+
+ clockevents_register_device(&systick.dev);
+
+ pr_info("%s: running - mult: %d, shift: %d\n",
+ np->name, systick.dev.mult, systick.dev.shift);
+}
+
+CLOCKSOURCE_OF_DECLARE(systick, "ralink,cevt-systick", ralink_systick_init);
diff --git a/arch/mips/ralink/clk.c b/arch/mips/ralink/clk.c
index 8dfa22ff300..5d0983d4716 100644
--- a/arch/mips/ralink/clk.c
+++ b/arch/mips/ralink/clk.c
@@ -26,7 +26,7 @@ void ralink_clk_add(const char *dev, unsigned long rate)
struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL);
if (!clk)
- panic("failed to add clock\n");
+ panic("failed to add clock");
clk->cl.dev_id = dev;
clk->cl.clk = clk;
@@ -69,4 +69,5 @@ void __init plat_time_init(void)
pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000);
mips_hpt_frequency = clk_get_rate(clk) / 2;
clk_put(clk);
+ clocksource_of_init();
}
diff --git a/arch/mips/ralink/common.h b/arch/mips/ralink/common.h
index 300990313e1..42dfd6100a2 100644
--- a/arch/mips/ralink/common.h
+++ b/arch/mips/ralink/common.h
@@ -22,13 +22,22 @@ struct ralink_pinmux {
struct ralink_pinmux_grp *mode;
struct ralink_pinmux_grp *uart;
int uart_shift;
+ u32 uart_mask;
void (*wdt_reset)(void);
+ struct ralink_pinmux_grp *pci;
+ int pci_shift;
+ u32 pci_mask;
};
-extern struct ralink_pinmux gpio_pinmux;
+extern struct ralink_pinmux rt_gpio_pinmux;
struct ralink_soc_info {
unsigned char sys_type[RAMIPS_SYS_TYPE_LEN];
unsigned char *compatible;
+
+ unsigned long mem_base;
+ unsigned long mem_size;
+ unsigned long mem_size_min;
+ unsigned long mem_size_max;
};
extern struct ralink_soc_info soc_info;
@@ -37,6 +46,8 @@ extern void ralink_of_remap(void);
extern void ralink_clk_init(void);
extern void ralink_clk_add(const char *dev, unsigned long rate);
+extern void ralink_rst_init(void);
+
extern void prom_soc_init(struct ralink_soc_info *soc_info);
__iomem void *plat_of_remap_node(const char *node);
diff --git a/arch/mips/ralink/dts/Makefile b/arch/mips/ralink/dts/Makefile
index 1a69fb30095..18194fa93e8 100644
--- a/arch/mips/ralink/dts/Makefile
+++ b/arch/mips/ralink/dts/Makefile
@@ -1 +1,4 @@
+obj-$(CONFIG_DTB_RT2880_EVAL) := rt2880_eval.dtb.o
obj-$(CONFIG_DTB_RT305X_EVAL) := rt3052_eval.dtb.o
+obj-$(CONFIG_DTB_RT3883_EVAL) := rt3883_eval.dtb.o
+obj-$(CONFIG_DTB_MT7620A_EVAL) := mt7620a_eval.dtb.o
diff --git a/arch/mips/ralink/dts/mt7620a.dtsi b/arch/mips/ralink/dts/mt7620a.dtsi
new file mode 100644
index 00000000000..08bf24fefe9
--- /dev/null
+++ b/arch/mips/ralink/dts/mt7620a.dtsi
@@ -0,0 +1,58 @@
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "ralink,mtk7620a-soc";
+
+ cpus {
+ cpu@0 {
+ compatible = "mips,mips24KEc";
+ };
+ };
+
+ cpuintc: cpuintc@0 {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ compatible = "mti,cpu-interrupt-controller";
+ };
+
+ palmbus@10000000 {
+ compatible = "palmbus";
+ reg = <0x10000000 0x200000>;
+ ranges = <0x0 0x10000000 0x1FFFFF>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ sysc@0 {
+ compatible = "ralink,mt7620a-sysc";
+ reg = <0x0 0x100>;
+ };
+
+ intc: intc@200 {
+ compatible = "ralink,mt7620a-intc", "ralink,rt2880-intc";
+ reg = <0x200 0x100>;
+
+ interrupt-controller;
+ #interrupt-cells = <1>;
+
+ interrupt-parent = <&cpuintc>;
+ interrupts = <2>;
+ };
+
+ memc@300 {
+ compatible = "ralink,mt7620a-memc", "ralink,rt3050-memc";
+ reg = <0x300 0x100>;
+ };
+
+ uartlite@c00 {
+ compatible = "ralink,mt7620a-uart", "ralink,rt2880-uart", "ns16550a";
+ reg = <0xc00 0x100>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <12>;
+
+ reg-shift = <2>;
+ };
+ };
+};
diff --git a/arch/mips/ralink/dts/mt7620a_eval.dts b/arch/mips/ralink/dts/mt7620a_eval.dts
new file mode 100644
index 00000000000..709f58132f5
--- /dev/null
+++ b/arch/mips/ralink/dts/mt7620a_eval.dts
@@ -0,0 +1,17 @@
+/dts-v1/;
+
+/include/ "mt7620a.dtsi"
+
+/ {
+ compatible = "ralink,mt7620a-eval-board", "ralink,mt7620a-soc";
+ model = "Ralink MT7620A evaluation board";
+
+ memory@0 {
+ device_type = "memory";
+ reg = <0x0 0x2000000>;
+ };
+
+ chosen {
+ bootargs = "console=ttyS0,57600";
+ };
+};
diff --git a/arch/mips/ralink/dts/rt2880.dtsi b/arch/mips/ralink/dts/rt2880.dtsi
new file mode 100644
index 00000000000..182afde2f2e
--- /dev/null
+++ b/arch/mips/ralink/dts/rt2880.dtsi
@@ -0,0 +1,58 @@
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "ralink,rt2880-soc";
+
+ cpus {
+ cpu@0 {
+ compatible = "mips,mips4KEc";
+ };
+ };
+
+ cpuintc: cpuintc@0 {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ compatible = "mti,cpu-interrupt-controller";
+ };
+
+ palmbus@300000 {
+ compatible = "palmbus";
+ reg = <0x300000 0x200000>;
+ ranges = <0x0 0x300000 0x1FFFFF>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ sysc@0 {
+ compatible = "ralink,rt2880-sysc";
+ reg = <0x0 0x100>;
+ };
+
+ intc: intc@200 {
+ compatible = "ralink,rt2880-intc";
+ reg = <0x200 0x100>;
+
+ interrupt-controller;
+ #interrupt-cells = <1>;
+
+ interrupt-parent = <&cpuintc>;
+ interrupts = <2>;
+ };
+
+ memc@300 {
+ compatible = "ralink,rt2880-memc";
+ reg = <0x300 0x100>;
+ };
+
+ uartlite@c00 {
+ compatible = "ralink,rt2880-uart", "ns16550a";
+ reg = <0xc00 0x100>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <8>;
+
+ reg-shift = <2>;
+ };
+ };
+};
diff --git a/arch/mips/ralink/dts/rt2880_eval.dts b/arch/mips/ralink/dts/rt2880_eval.dts
new file mode 100644
index 00000000000..0a685db093d
--- /dev/null
+++ b/arch/mips/ralink/dts/rt2880_eval.dts
@@ -0,0 +1,47 @@
+/dts-v1/;
+
+/include/ "rt2880.dtsi"
+
+/ {
+ compatible = "ralink,rt2880-eval-board", "ralink,rt2880-soc";
+ model = "Ralink RT2880 evaluation board";
+
+ memory@0 {
+ device_type = "memory";
+ reg = <0x8000000 0x2000000>;
+ };
+
+ chosen {
+ bootargs = "console=ttyS0,57600";
+ };
+
+ cfi@1f000000 {
+ compatible = "cfi-flash";
+ reg = <0x1f000000 0x400000>;
+
+ bank-width = <2>;
+ device-width = <2>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "uboot";
+ reg = <0x0 0x30000>;
+ read-only;
+ };
+ partition@30000 {
+ label = "uboot-env";
+ reg = <0x30000 0x10000>;
+ read-only;
+ };
+ partition@40000 {
+ label = "calibration";
+ reg = <0x40000 0x10000>;
+ read-only;
+ };
+ partition@50000 {
+ label = "linux";
+ reg = <0x50000 0x3b0000>;
+ };
+ };
+};
diff --git a/arch/mips/ralink/dts/rt3050.dtsi b/arch/mips/ralink/dts/rt3050.dtsi
index 069d0660e1d..e3203d414fe 100644
--- a/arch/mips/ralink/dts/rt3050.dtsi
+++ b/arch/mips/ralink/dts/rt3050.dtsi
@@ -1,7 +1,7 @@
/ {
#address-cells = <1>;
#size-cells = <1>;
- compatible = "ralink,rt3050-soc", "ralink,rt3052-soc";
+ compatible = "ralink,rt3050-soc", "ralink,rt3052-soc", "ralink,rt3350-soc";
cpus {
cpu@0 {
@@ -9,10 +9,6 @@
};
};
- chosen {
- bootargs = "console=ttyS0,57600 init=/init";
- };
-
cpuintc: cpuintc@0 {
#address-cells = <0>;
#interrupt-cells = <1>;
@@ -23,7 +19,7 @@
palmbus@10000000 {
compatible = "palmbus";
reg = <0x10000000 0x200000>;
- ranges = <0x0 0x10000000 0x1FFFFF>;
+ ranges = <0x0 0x10000000 0x1FFFFF>;
#address-cells = <1>;
#size-cells = <1>;
@@ -33,11 +29,6 @@
reg = <0x0 0x100>;
};
- timer@100 {
- compatible = "ralink,rt3052-wdt", "ralink,rt2880-wdt";
- reg = <0x100 0x100>;
- };
-
intc: intc@200 {
compatible = "ralink,rt3052-intc", "ralink,rt2880-intc";
reg = <0x200 0x100>;
@@ -54,45 +45,6 @@
reg = <0x300 0x100>;
};
- gpio0: gpio@600 {
- compatible = "ralink,rt3052-gpio", "ralink,rt2880-gpio";
- reg = <0x600 0x34>;
-
- gpio-controller;
- #gpio-cells = <2>;
-
- ralink,ngpio = <24>;
- ralink,regs = [ 00 04 08 0c
- 20 24 28 2c
- 30 34 ];
- };
-
- gpio1: gpio@638 {
- compatible = "ralink,rt3052-gpio", "ralink,rt2880-gpio";
- reg = <0x638 0x24>;
-
- gpio-controller;
- #gpio-cells = <2>;
-
- ralink,ngpio = <16>;
- ralink,regs = [ 00 04 08 0c
- 10 14 18 1c
- 20 24 ];
- };
-
- gpio2: gpio@660 {
- compatible = "ralink,rt3052-gpio", "ralink,rt2880-gpio";
- reg = <0x660 0x24>;
-
- gpio-controller;
- #gpio-cells = <2>;
-
- ralink,ngpio = <12>;
- ralink,regs = [ 00 04 08 0c
- 10 14 18 1c
- 20 24 ];
- };
-
uartlite@c00 {
compatible = "ralink,rt3052-uart", "ralink,rt2880-uart", "ns16550a";
reg = <0xc00 0x100>;
@@ -103,4 +55,14 @@
reg-shift = <2>;
};
};
+
+ usb@101c0000 {
+ compatible = "ralink,rt3050-usb", "snps,dwc2";
+ reg = <0x101c0000 40000>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <18>;
+
+ status = "disabled";
+ };
};
diff --git a/arch/mips/ralink/dts/rt3052_eval.dts b/arch/mips/ralink/dts/rt3052_eval.dts
index 148a590bc41..ec9e9a03554 100644
--- a/arch/mips/ralink/dts/rt3052_eval.dts
+++ b/arch/mips/ralink/dts/rt3052_eval.dts
@@ -1,23 +1,18 @@
/dts-v1/;
-/include/ "rt3050.dtsi"
+#include "rt3050.dtsi"
/ {
- #address-cells = <1>;
- #size-cells = <1>;
compatible = "ralink,rt3052-eval-board", "ralink,rt3052-soc";
model = "Ralink RT3052 evaluation board";
memory@0 {
+ device_type = "memory";
reg = <0x0 0x2000000>;
};
- palmbus@10000000 {
- sysc@0 {
- ralink,pinmmux = "uartlite", "spi";
- ralink,uartmux = "gpio";
- ralink,wdtmux = <0>;
- };
+ chosen {
+ bootargs = "console=ttyS0,57600";
};
cfi@1f000000 {
@@ -49,4 +44,8 @@
reg = <0x50000 0x7b0000>;
};
};
+
+ usb@101c0000 {
+ status = "ok";
+ };
};
diff --git a/arch/mips/ralink/dts/rt3883.dtsi b/arch/mips/ralink/dts/rt3883.dtsi
new file mode 100644
index 00000000000..3b131dd0d5a
--- /dev/null
+++ b/arch/mips/ralink/dts/rt3883.dtsi
@@ -0,0 +1,58 @@
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "ralink,rt3883-soc";
+
+ cpus {
+ cpu@0 {
+ compatible = "mips,mips74Kc";
+ };
+ };
+
+ cpuintc: cpuintc@0 {
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ compatible = "mti,cpu-interrupt-controller";
+ };
+
+ palmbus@10000000 {
+ compatible = "palmbus";
+ reg = <0x10000000 0x200000>;
+ ranges = <0x0 0x10000000 0x1FFFFF>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ sysc@0 {
+ compatible = "ralink,rt3883-sysc", "ralink,rt3050-sysc";
+ reg = <0x0 0x100>;
+ };
+
+ intc: intc@200 {
+ compatible = "ralink,rt3883-intc", "ralink,rt2880-intc";
+ reg = <0x200 0x100>;
+
+ interrupt-controller;
+ #interrupt-cells = <1>;
+
+ interrupt-parent = <&cpuintc>;
+ interrupts = <2>;
+ };
+
+ memc@300 {
+ compatible = "ralink,rt3883-memc", "ralink,rt3050-memc";
+ reg = <0x300 0x100>;
+ };
+
+ uartlite@c00 {
+ compatible = "ralink,rt3883-uart", "ralink,rt2880-uart", "ns16550a";
+ reg = <0xc00 0x100>;
+
+ interrupt-parent = <&intc>;
+ interrupts = <12>;
+
+ reg-shift = <2>;
+ };
+ };
+};
diff --git a/arch/mips/ralink/dts/rt3883_eval.dts b/arch/mips/ralink/dts/rt3883_eval.dts
new file mode 100644
index 00000000000..e8df21a5d10
--- /dev/null
+++ b/arch/mips/ralink/dts/rt3883_eval.dts
@@ -0,0 +1,17 @@
+/dts-v1/;
+
+/include/ "rt3883.dtsi"
+
+/ {
+ compatible = "ralink,rt3883-eval-board", "ralink,rt3883-soc";
+ model = "Ralink RT3883 evaluation board";
+
+ memory@0 {
+ device_type = "memory";
+ reg = <0x0 0x2000000>;
+ };
+
+ chosen {
+ bootargs = "console=ttyS0,57600";
+ };
+};
diff --git a/arch/mips/ralink/early_printk.c b/arch/mips/ralink/early_printk.c
index c4ae47eb24a..b46d0419d09 100644
--- a/arch/mips/ralink/early_printk.c
+++ b/arch/mips/ralink/early_printk.c
@@ -11,7 +11,11 @@
#include <asm/addrspace.h>
+#ifdef CONFIG_SOC_RT288X
+#define EARLY_UART_BASE 0x300c00
+#else
#define EARLY_UART_BASE 0x10000c00
+#endif
#define UART_REG_RX 0x00
#define UART_REG_TX 0x04
diff --git a/arch/mips/ralink/irq.c b/arch/mips/ralink/irq.c
index 6d054c5ec9a..781b3d14a48 100644
--- a/arch/mips/ralink/irq.c
+++ b/arch/mips/ralink/irq.c
@@ -31,6 +31,7 @@
#define INTC_INT_GLOBAL BIT(31)
#define RALINK_CPU_IRQ_INTC (MIPS_CPU_IRQ_BASE + 2)
+#define RALINK_CPU_IRQ_PCI (MIPS_CPU_IRQ_BASE + 4)
#define RALINK_CPU_IRQ_FE (MIPS_CPU_IRQ_BASE + 5)
#define RALINK_CPU_IRQ_WIFI (MIPS_CPU_IRQ_BASE + 6)
#define RALINK_CPU_IRQ_COUNTER (MIPS_CPU_IRQ_BASE + 7)
@@ -72,7 +73,7 @@ static struct irq_chip ralink_intc_irq_chip = {
.irq_mask_ack = ralink_intc_irq_mask,
};
-unsigned int __cpuinit get_c0_compare_int(void)
+unsigned int get_c0_compare_int(void)
{
return CP0_LEGACY_COMPARE_IRQ;
}
@@ -104,6 +105,9 @@ asmlinkage void plat_irq_dispatch(void)
else if (pending & STATUSF_IP6)
do_IRQ(RALINK_CPU_IRQ_WIFI);
+ else if (pending & STATUSF_IP4)
+ do_IRQ(RALINK_CPU_IRQ_PCI);
+
else if (pending & STATUSF_IP2)
do_IRQ(RALINK_CPU_IRQ_INTC);
@@ -162,6 +166,7 @@ static int __init intc_of_init(struct device_node *node,
irq_set_chained_handler(irq, ralink_intc_irq_handler);
irq_set_handler_data(irq, domain);
+ /* tell the kernel which irq is used for performance monitoring */
cp0_perfcount_irq = irq_create_mapping(domain, 9);
return 0;
diff --git a/arch/mips/ralink/mt7620.c b/arch/mips/ralink/mt7620.c
new file mode 100644
index 00000000000..a3ad56c2372
--- /dev/null
+++ b/arch/mips/ralink/mt7620.c
@@ -0,0 +1,389 @@
+/*
+ * 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.
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/mt7620.h>
+
+#include "common.h"
+
+/* does the board have sdram or ddram */
+static int dram_type;
+
+static struct ralink_pinmux_grp mode_mux[] = {
+ {
+ .name = "i2c",
+ .mask = MT7620_GPIO_MODE_I2C,
+ .gpio_first = 1,
+ .gpio_last = 2,
+ }, {
+ .name = "spi",
+ .mask = MT7620_GPIO_MODE_SPI,
+ .gpio_first = 3,
+ .gpio_last = 6,
+ }, {
+ .name = "uartlite",
+ .mask = MT7620_GPIO_MODE_UART1,
+ .gpio_first = 15,
+ .gpio_last = 16,
+ }, {
+ .name = "wdt",
+ .mask = MT7620_GPIO_MODE_WDT,
+ .gpio_first = 17,
+ .gpio_last = 17,
+ }, {
+ .name = "mdio",
+ .mask = MT7620_GPIO_MODE_MDIO,
+ .gpio_first = 22,
+ .gpio_last = 23,
+ }, {
+ .name = "rgmii1",
+ .mask = MT7620_GPIO_MODE_RGMII1,
+ .gpio_first = 24,
+ .gpio_last = 35,
+ }, {
+ .name = "spi refclk",
+ .mask = MT7620_GPIO_MODE_SPI_REF_CLK,
+ .gpio_first = 37,
+ .gpio_last = 39,
+ }, {
+ .name = "jtag",
+ .mask = MT7620_GPIO_MODE_JTAG,
+ .gpio_first = 40,
+ .gpio_last = 44,
+ }, {
+ /* shared lines with jtag */
+ .name = "ephy",
+ .mask = MT7620_GPIO_MODE_EPHY,
+ .gpio_first = 40,
+ .gpio_last = 44,
+ }, {
+ .name = "nand",
+ .mask = MT7620_GPIO_MODE_JTAG,
+ .gpio_first = 45,
+ .gpio_last = 59,
+ }, {
+ .name = "rgmii2",
+ .mask = MT7620_GPIO_MODE_RGMII2,
+ .gpio_first = 60,
+ .gpio_last = 71,
+ }, {
+ .name = "wled",
+ .mask = MT7620_GPIO_MODE_WLED,
+ .gpio_first = 72,
+ .gpio_last = 72,
+ }, {0}
+};
+
+static struct ralink_pinmux_grp uart_mux[] = {
+ {
+ .name = "uartf",
+ .mask = MT7620_GPIO_MODE_UARTF,
+ .gpio_first = 7,
+ .gpio_last = 14,
+ }, {
+ .name = "pcm uartf",
+ .mask = MT7620_GPIO_MODE_PCM_UARTF,
+ .gpio_first = 7,
+ .gpio_last = 14,
+ }, {
+ .name = "pcm i2s",
+ .mask = MT7620_GPIO_MODE_PCM_I2S,
+ .gpio_first = 7,
+ .gpio_last = 14,
+ }, {
+ .name = "i2s uartf",
+ .mask = MT7620_GPIO_MODE_I2S_UARTF,
+ .gpio_first = 7,
+ .gpio_last = 14,
+ }, {
+ .name = "pcm gpio",
+ .mask = MT7620_GPIO_MODE_PCM_GPIO,
+ .gpio_first = 11,
+ .gpio_last = 14,
+ }, {
+ .name = "gpio uartf",
+ .mask = MT7620_GPIO_MODE_GPIO_UARTF,
+ .gpio_first = 7,
+ .gpio_last = 10,
+ }, {
+ .name = "gpio i2s",
+ .mask = MT7620_GPIO_MODE_GPIO_I2S,
+ .gpio_first = 7,
+ .gpio_last = 10,
+ }, {
+ .name = "gpio",
+ .mask = MT7620_GPIO_MODE_GPIO,
+ }, {0}
+};
+
+struct ralink_pinmux rt_gpio_pinmux = {
+ .mode = mode_mux,
+ .uart = uart_mux,
+ .uart_shift = MT7620_GPIO_MODE_UART0_SHIFT,
+ .uart_mask = MT7620_GPIO_MODE_UART0_MASK,
+};
+
+static __init u32
+mt7620_calc_rate(u32 ref_rate, u32 mul, u32 div)
+{
+ u64 t;
+
+ t = ref_rate;
+ t *= mul;
+ do_div(t, div);
+
+ return t;
+}
+
+#define MHZ(x) ((x) * 1000 * 1000)
+
+static __init unsigned long
+mt7620_get_xtal_rate(void)
+{
+ u32 reg;
+
+ reg = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG0);
+ if (reg & SYSCFG0_XTAL_FREQ_SEL)
+ return MHZ(40);
+
+ return MHZ(20);
+}
+
+static __init unsigned long
+mt7620_get_periph_rate(unsigned long xtal_rate)
+{
+ u32 reg;
+
+ reg = rt_sysc_r32(SYSC_REG_CLKCFG0);
+ if (reg & CLKCFG0_PERI_CLK_SEL)
+ return xtal_rate;
+
+ return MHZ(40);
+}
+
+static const u32 mt7620_clk_divider[] __initconst = { 2, 3, 4, 8 };
+
+static __init unsigned long
+mt7620_get_cpu_pll_rate(unsigned long xtal_rate)
+{
+ u32 reg;
+ u32 mul;
+ u32 div;
+
+ reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG0);
+ if (reg & CPLL_CFG0_BYPASS_REF_CLK)
+ return xtal_rate;
+
+ if ((reg & CPLL_CFG0_SW_CFG) == 0)
+ return MHZ(600);
+
+ mul = (reg >> CPLL_CFG0_PLL_MULT_RATIO_SHIFT) &
+ CPLL_CFG0_PLL_MULT_RATIO_MASK;
+ mul += 24;
+ if (reg & CPLL_CFG0_LC_CURFCK)
+ mul *= 2;
+
+ div = (reg >> CPLL_CFG0_PLL_DIV_RATIO_SHIFT) &
+ CPLL_CFG0_PLL_DIV_RATIO_MASK;
+
+ WARN_ON(div >= ARRAY_SIZE(mt7620_clk_divider));
+
+ return mt7620_calc_rate(xtal_rate, mul, mt7620_clk_divider[div]);
+}
+
+static __init unsigned long
+mt7620_get_pll_rate(unsigned long xtal_rate, unsigned long cpu_pll_rate)
+{
+ u32 reg;
+
+ reg = rt_sysc_r32(SYSC_REG_CPLL_CONFIG1);
+ if (reg & CPLL_CFG1_CPU_AUX1)
+ return xtal_rate;
+
+ if (reg & CPLL_CFG1_CPU_AUX0)
+ return MHZ(480);
+
+ return cpu_pll_rate;
+}
+
+static __init unsigned long
+mt7620_get_cpu_rate(unsigned long pll_rate)
+{
+ u32 reg;
+ u32 mul;
+ u32 div;
+
+ reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
+
+ mul = reg & CPU_SYS_CLKCFG_CPU_FFRAC_MASK;
+ div = (reg >> CPU_SYS_CLKCFG_CPU_FDIV_SHIFT) &
+ CPU_SYS_CLKCFG_CPU_FDIV_MASK;
+
+ return mt7620_calc_rate(pll_rate, mul, div);
+}
+
+static const u32 mt7620_ocp_dividers[16] __initconst = {
+ [CPU_SYS_CLKCFG_OCP_RATIO_2] = 2,
+ [CPU_SYS_CLKCFG_OCP_RATIO_3] = 3,
+ [CPU_SYS_CLKCFG_OCP_RATIO_4] = 4,
+ [CPU_SYS_CLKCFG_OCP_RATIO_5] = 5,
+ [CPU_SYS_CLKCFG_OCP_RATIO_10] = 10,
+};
+
+static __init unsigned long
+mt7620_get_dram_rate(unsigned long pll_rate)
+{
+ if (dram_type == SYSCFG0_DRAM_TYPE_SDRAM)
+ return pll_rate / 4;
+
+ return pll_rate / 3;
+}
+
+static __init unsigned long
+mt7620_get_sys_rate(unsigned long cpu_rate)
+{
+ u32 reg;
+ u32 ocp_ratio;
+ u32 div;
+
+ reg = rt_sysc_r32(SYSC_REG_CPU_SYS_CLKCFG);
+
+ ocp_ratio = (reg >> CPU_SYS_CLKCFG_OCP_RATIO_SHIFT) &
+ CPU_SYS_CLKCFG_OCP_RATIO_MASK;
+
+ if (WARN_ON(ocp_ratio >= ARRAY_SIZE(mt7620_ocp_dividers)))
+ return cpu_rate;
+
+ div = mt7620_ocp_dividers[ocp_ratio];
+ if (WARN(!div, "invalid divider for OCP ratio %u", ocp_ratio))
+ return cpu_rate;
+
+ return cpu_rate / div;
+}
+
+void __init ralink_clk_init(void)
+{
+ unsigned long xtal_rate;
+ unsigned long cpu_pll_rate;
+ unsigned long pll_rate;
+ unsigned long cpu_rate;
+ unsigned long sys_rate;
+ unsigned long dram_rate;
+ unsigned long periph_rate;
+
+ xtal_rate = mt7620_get_xtal_rate();
+
+ cpu_pll_rate = mt7620_get_cpu_pll_rate(xtal_rate);
+ pll_rate = mt7620_get_pll_rate(xtal_rate, cpu_pll_rate);
+
+ cpu_rate = mt7620_get_cpu_rate(pll_rate);
+ dram_rate = mt7620_get_dram_rate(pll_rate);
+ sys_rate = mt7620_get_sys_rate(cpu_rate);
+ periph_rate = mt7620_get_periph_rate(xtal_rate);
+
+#define RFMT(label) label ":%lu.%03luMHz "
+#define RINT(x) ((x) / 1000000)
+#define RFRAC(x) (((x) / 1000) % 1000)
+
+ pr_debug(RFMT("XTAL") RFMT("CPU_PLL") RFMT("PLL"),
+ RINT(xtal_rate), RFRAC(xtal_rate),
+ RINT(cpu_pll_rate), RFRAC(cpu_pll_rate),
+ RINT(pll_rate), RFRAC(pll_rate));
+
+ pr_debug(RFMT("CPU") RFMT("DRAM") RFMT("SYS") RFMT("PERIPH"),
+ RINT(cpu_rate), RFRAC(cpu_rate),
+ RINT(dram_rate), RFRAC(dram_rate),
+ RINT(sys_rate), RFRAC(sys_rate),
+ RINT(periph_rate), RFRAC(periph_rate));
+
+#undef RFRAC
+#undef RINT
+#undef RFMT
+
+ ralink_clk_add("cpu", cpu_rate);
+ ralink_clk_add("10000100.timer", periph_rate);
+ ralink_clk_add("10000120.watchdog", periph_rate);
+ ralink_clk_add("10000500.uart", periph_rate);
+ ralink_clk_add("10000b00.spi", sys_rate);
+ ralink_clk_add("10000c00.uartlite", periph_rate);
+}
+
+void __init ralink_of_remap(void)
+{
+ rt_sysc_membase = plat_of_remap_node("ralink,mt7620a-sysc");
+ rt_memc_membase = plat_of_remap_node("ralink,mt7620a-memc");
+
+ if (!rt_sysc_membase || !rt_memc_membase)
+ panic("Failed to remap core resources");
+}
+
+void prom_soc_init(struct ralink_soc_info *soc_info)
+{
+ void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7620_SYSC_BASE);
+ unsigned char *name = NULL;
+ u32 n0;
+ u32 n1;
+ u32 rev;
+ u32 cfg0;
+
+ n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
+ n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
+
+ if (n0 == MT7620N_CHIP_NAME0 && n1 == MT7620N_CHIP_NAME1) {
+ name = "MT7620N";
+ soc_info->compatible = "ralink,mt7620n-soc";
+ } else if (n0 == MT7620A_CHIP_NAME0 && n1 == MT7620A_CHIP_NAME1) {
+ name = "MT7620A";
+ soc_info->compatible = "ralink,mt7620a-soc";
+ } else {
+ panic("mt7620: unknown SoC, n0:%08x n1:%08x", n0, n1);
+ }
+
+ rev = __raw_readl(sysc + SYSC_REG_CHIP_REV);
+
+ snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+ "Ralink %s ver:%u eco:%u",
+ name,
+ (rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK,
+ (rev & CHIP_REV_ECO_MASK));
+
+ cfg0 = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG0);
+ dram_type = (cfg0 >> SYSCFG0_DRAM_TYPE_SHIFT) & SYSCFG0_DRAM_TYPE_MASK;
+
+ switch (dram_type) {
+ case SYSCFG0_DRAM_TYPE_SDRAM:
+ pr_info("Board has SDRAM\n");
+ soc_info->mem_size_min = MT7620_SDRAM_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_SDRAM_SIZE_MAX;
+ break;
+
+ case SYSCFG0_DRAM_TYPE_DDR1:
+ pr_info("Board has DDR1\n");
+ soc_info->mem_size_min = MT7620_DDR1_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_DDR1_SIZE_MAX;
+ break;
+
+ case SYSCFG0_DRAM_TYPE_DDR2:
+ pr_info("Board has DDR2\n");
+ soc_info->mem_size_min = MT7620_DDR2_SIZE_MIN;
+ soc_info->mem_size_max = MT7620_DDR2_SIZE_MAX;
+ break;
+ default:
+ BUG();
+ }
+ soc_info->mem_base = MT7620_DRAM_BASE;
+}
diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
index 4165e70775b..251395210e2 100644
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -11,6 +11,7 @@
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/init.h>
+#include <linux/sizes.h>
#include <linux/of_fdt.h>
#include <linux/kernel.h>
#include <linux/bootmem.h>
@@ -20,14 +21,13 @@
#include <asm/reboot.h>
#include <asm/bootinfo.h>
#include <asm/addrspace.h>
+#include <asm/prom.h>
#include "common.h"
__iomem void *rt_sysc_membase;
__iomem void *rt_memc_membase;
-extern struct boot_param_header __dtb_start;
-
__iomem void *plat_of_remap_node(const char *node)
{
struct resource res;
@@ -50,30 +50,7 @@ __iomem void *plat_of_remap_node(const char *node)
void __init device_tree_init(void)
{
- unsigned long base, size;
- void *fdt_copy;
-
- if (!initial_boot_params)
- return;
-
- base = virt_to_phys((void *)initial_boot_params);
- size = be32_to_cpu(initial_boot_params->totalsize);
-
- /* Before we do anything, lets reserve the dt blob */
- reserve_bootmem(base, size, BOOTMEM_DEFAULT);
-
- /* The strings in the flattened tree are referenced directly by the
- * device tree, so copy the flattened device tree from init memory
- * to regular memory.
- */
- fdt_copy = alloc_bootmem(size);
- memcpy(fdt_copy, initial_boot_params, size);
- initial_boot_params = fdt_copy;
-
- unflatten_device_tree();
-
- /* free the space reserved for the dt blob */
- free_bootmem(base, size);
+ unflatten_and_copy_device_tree();
}
void __init plat_mem_setup(void)
@@ -84,7 +61,15 @@ void __init plat_mem_setup(void)
* Load the builtin devicetree. This causes the chosen node to be
* parsed resulting in our memory appearing
*/
- __dt_setup_arch(&__dtb_start);
+ __dt_setup_arch(__dtb_start);
+
+ if (soc_info.mem_size)
+ add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
+ BOOT_MEM_RAM);
+ else
+ detect_memory_region(soc_info.mem_base,
+ soc_info.mem_size_min * SZ_1M,
+ soc_info.mem_size_max * SZ_1M);
}
static int __init plat_of_setup(void)
@@ -95,11 +80,14 @@ static int __init plat_of_setup(void)
if (!of_have_populated_dt())
panic("device tree not present");
- strncpy(of_ids[0].compatible, soc_info.compatible, len);
+ strlcpy(of_ids[0].compatible, soc_info.compatible, len);
strncpy(of_ids[1].compatible, "palmbus", len);
if (of_platform_populate(NULL, of_ids, NULL, NULL))
- panic("failed to populate DT\n");
+ panic("failed to populate DT");
+
+ /* make sure ithat the reset controller is setup early */
+ ralink_rst_init();
return 0;
}
diff --git a/arch/mips/ralink/reset.c b/arch/mips/ralink/reset.c
index 22120e512e7..55c7ec59df3 100644
--- a/arch/mips/ralink/reset.c
+++ b/arch/mips/ralink/reset.c
@@ -10,6 +10,8 @@
#include <linux/pm.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/reset-controller.h>
#include <asm/reboot.h>
@@ -19,6 +21,66 @@
#define SYSC_REG_RESET_CTRL 0x034
#define RSTCTL_RESET_SYSTEM BIT(0)
+static int ralink_assert_device(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ u32 val;
+
+ if (id < 8)
+ return -1;
+
+ val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
+ val |= BIT(id);
+ rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
+
+ return 0;
+}
+
+static int ralink_deassert_device(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ u32 val;
+
+ if (id < 8)
+ return -1;
+
+ val = rt_sysc_r32(SYSC_REG_RESET_CTRL);
+ val &= ~BIT(id);
+ rt_sysc_w32(val, SYSC_REG_RESET_CTRL);
+
+ return 0;
+}
+
+static int ralink_reset_device(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ ralink_assert_device(rcdev, id);
+ return ralink_deassert_device(rcdev, id);
+}
+
+static struct reset_control_ops reset_ops = {
+ .reset = ralink_reset_device,
+ .assert = ralink_assert_device,
+ .deassert = ralink_deassert_device,
+};
+
+static struct reset_controller_dev reset_dev = {
+ .ops = &reset_ops,
+ .owner = THIS_MODULE,
+ .nr_resets = 32,
+ .of_reset_n_cells = 1,
+};
+
+void ralink_rst_init(void)
+{
+ reset_dev.of_node = of_find_compatible_node(NULL, NULL,
+ "ralink,rt2880-reset");
+ if (!reset_dev.of_node)
+ pr_err("Failed to find reset controller node");
+ else
+ reset_controller_register(&reset_dev);
+}
+
static void ralink_restart(char *command)
{
local_irq_disable();
diff --git a/arch/mips/ralink/rt288x.c b/arch/mips/ralink/rt288x.c
new file mode 100644
index 00000000000..f87de1ab219
--- /dev/null
+++ b/arch/mips/ralink/rt288x.c
@@ -0,0 +1,143 @@
+/*
+ * 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.
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/rt288x.h>
+
+#include "common.h"
+
+static struct ralink_pinmux_grp mode_mux[] = {
+ {
+ .name = "i2c",
+ .mask = RT2880_GPIO_MODE_I2C,
+ .gpio_first = 1,
+ .gpio_last = 2,
+ }, {
+ .name = "spi",
+ .mask = RT2880_GPIO_MODE_SPI,
+ .gpio_first = 3,
+ .gpio_last = 6,
+ }, {
+ .name = "uartlite",
+ .mask = RT2880_GPIO_MODE_UART0,
+ .gpio_first = 7,
+ .gpio_last = 14,
+ }, {
+ .name = "jtag",
+ .mask = RT2880_GPIO_MODE_JTAG,
+ .gpio_first = 17,
+ .gpio_last = 21,
+ }, {
+ .name = "mdio",
+ .mask = RT2880_GPIO_MODE_MDIO,
+ .gpio_first = 22,
+ .gpio_last = 23,
+ }, {
+ .name = "sdram",
+ .mask = RT2880_GPIO_MODE_SDRAM,
+ .gpio_first = 24,
+ .gpio_last = 39,
+ }, {
+ .name = "pci",
+ .mask = RT2880_GPIO_MODE_PCI,
+ .gpio_first = 40,
+ .gpio_last = 71,
+ }, {0}
+};
+
+static void rt288x_wdt_reset(void)
+{
+ u32 t;
+
+ /* enable WDT reset output on pin SRAM_CS_N */
+ t = rt_sysc_r32(SYSC_REG_CLKCFG);
+ t |= CLKCFG_SRAM_CS_N_WDT;
+ rt_sysc_w32(t, SYSC_REG_CLKCFG);
+}
+
+struct ralink_pinmux rt_gpio_pinmux = {
+ .mode = mode_mux,
+ .wdt_reset = rt288x_wdt_reset,
+};
+
+void __init ralink_clk_init(void)
+{
+ unsigned long cpu_rate;
+ u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
+ t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
+
+ switch (t) {
+ case SYSTEM_CONFIG_CPUCLK_250:
+ cpu_rate = 250000000;
+ break;
+ case SYSTEM_CONFIG_CPUCLK_266:
+ cpu_rate = 266666667;
+ break;
+ case SYSTEM_CONFIG_CPUCLK_280:
+ cpu_rate = 280000000;
+ break;
+ case SYSTEM_CONFIG_CPUCLK_300:
+ cpu_rate = 300000000;
+ break;
+ }
+
+ ralink_clk_add("cpu", cpu_rate);
+ ralink_clk_add("300100.timer", cpu_rate / 2);
+ ralink_clk_add("300120.watchdog", cpu_rate / 2);
+ ralink_clk_add("300500.uart", cpu_rate / 2);
+ ralink_clk_add("300c00.uartlite", cpu_rate / 2);
+ ralink_clk_add("400000.ethernet", cpu_rate / 2);
+}
+
+void __init ralink_of_remap(void)
+{
+ rt_sysc_membase = plat_of_remap_node("ralink,rt2880-sysc");
+ rt_memc_membase = plat_of_remap_node("ralink,rt2880-memc");
+
+ if (!rt_sysc_membase || !rt_memc_membase)
+ panic("Failed to remap core resources");
+}
+
+void prom_soc_init(struct ralink_soc_info *soc_info)
+{
+ void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT2880_SYSC_BASE);
+ const char *name;
+ u32 n0;
+ u32 n1;
+ u32 id;
+
+ n0 = __raw_readl(sysc + SYSC_REG_CHIP_NAME0);
+ n1 = __raw_readl(sysc + SYSC_REG_CHIP_NAME1);
+ id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
+
+ if (n0 == RT2880_CHIP_NAME0 && n1 == RT2880_CHIP_NAME1) {
+ soc_info->compatible = "ralink,r2880-soc";
+ name = "RT2880";
+ } else {
+ panic("rt288x: unknown SoC, n0:%08x n1:%08x", n0, n1);
+ }
+
+ snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+ "Ralink %s id:%u rev:%u",
+ name,
+ (id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
+ (id & CHIP_ID_REV_MASK));
+
+ soc_info->mem_base = RT2880_SDRAM_BASE;
+ soc_info->mem_size_min = RT2880_MEM_SIZE_MIN;
+ soc_info->mem_size_max = RT2880_MEM_SIZE_MAX;
+}
diff --git a/arch/mips/ralink/rt305x.c b/arch/mips/ralink/rt305x.c
index 0a4bbdcf59d..bb82a82da9e 100644
--- a/arch/mips/ralink/rt305x.c
+++ b/arch/mips/ralink/rt305x.c
@@ -22,7 +22,7 @@
enum rt305x_soc_type rt305x_soc;
-struct ralink_pinmux_grp mode_mux[] = {
+static struct ralink_pinmux_grp mode_mux[] = {
{
.name = "i2c",
.mask = RT305X_GPIO_MODE_I2C,
@@ -61,7 +61,7 @@ struct ralink_pinmux_grp mode_mux[] = {
}, {0}
};
-struct ralink_pinmux_grp uart_mux[] = {
+static struct ralink_pinmux_grp uart_mux[] = {
{
.name = "uartf",
.mask = RT305X_GPIO_MODE_UARTF,
@@ -91,19 +91,19 @@ struct ralink_pinmux_grp uart_mux[] = {
.name = "gpio uartf",
.mask = RT305X_GPIO_MODE_GPIO_UARTF,
.gpio_first = RT305X_GPIO_7,
- .gpio_last = RT305X_GPIO_14,
+ .gpio_last = RT305X_GPIO_10,
}, {
.name = "gpio i2s",
.mask = RT305X_GPIO_MODE_GPIO_I2S,
.gpio_first = RT305X_GPIO_7,
- .gpio_last = RT305X_GPIO_14,
+ .gpio_last = RT305X_GPIO_10,
}, {
.name = "gpio",
.mask = RT305X_GPIO_MODE_GPIO,
}, {0}
};
-void rt305x_wdt_reset(void)
+static void rt305x_wdt_reset(void)
{
u32 t;
@@ -114,16 +114,53 @@ void rt305x_wdt_reset(void)
rt_sysc_w32(t, SYSC_REG_SYSTEM_CONFIG);
}
-struct ralink_pinmux gpio_pinmux = {
+struct ralink_pinmux rt_gpio_pinmux = {
.mode = mode_mux,
.uart = uart_mux,
.uart_shift = RT305X_GPIO_MODE_UART0_SHIFT,
+ .uart_mask = RT305X_GPIO_MODE_UART0_MASK,
.wdt_reset = rt305x_wdt_reset,
};
+static unsigned long rt5350_get_mem_size(void)
+{
+ void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT305X_SYSC_BASE);
+ unsigned long ret;
+ u32 t;
+
+ t = __raw_readl(sysc + SYSC_REG_SYSTEM_CONFIG);
+ t = (t >> RT5350_SYSCFG0_DRAM_SIZE_SHIFT) &
+ RT5350_SYSCFG0_DRAM_SIZE_MASK;
+
+ switch (t) {
+ case RT5350_SYSCFG0_DRAM_SIZE_2M:
+ ret = 2;
+ break;
+ case RT5350_SYSCFG0_DRAM_SIZE_8M:
+ ret = 8;
+ break;
+ case RT5350_SYSCFG0_DRAM_SIZE_16M:
+ ret = 16;
+ break;
+ case RT5350_SYSCFG0_DRAM_SIZE_32M:
+ ret = 32;
+ break;
+ case RT5350_SYSCFG0_DRAM_SIZE_64M:
+ ret = 64;
+ break;
+ default:
+ panic("rt5350: invalid DRAM size: %u", t);
+ break;
+ }
+
+ return ret;
+}
+
void __init ralink_clk_init(void)
{
unsigned long cpu_rate, sys_rate, wdt_rate, uart_rate;
+ unsigned long wmac_rate = 40000000;
+
u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
if (soc_is_rt305x() || soc_is_rt3350()) {
@@ -176,11 +213,21 @@ void __init ralink_clk_init(void)
BUG();
}
+ if (soc_is_rt3352() || soc_is_rt5350()) {
+ u32 val = rt_sysc_r32(RT3352_SYSC_REG_SYSCFG0);
+
+ if (!(val & RT3352_CLKCFG0_XTAL_SEL))
+ wmac_rate = 20000000;
+ }
+
ralink_clk_add("cpu", cpu_rate);
ralink_clk_add("10000b00.spi", sys_rate);
ralink_clk_add("10000100.timer", wdt_rate);
+ ralink_clk_add("10000120.watchdog", wdt_rate);
ralink_clk_add("10000500.uart", uart_rate);
ralink_clk_add("10000c00.uartlite", uart_rate);
+ ralink_clk_add("10100000.ethernet", sys_rate);
+ ralink_clk_add("10180000.wmac", wmac_rate);
}
void __init ralink_of_remap(void)
@@ -229,7 +276,7 @@ void prom_soc_init(struct ralink_soc_info *soc_info)
name = "RT5350";
soc_info->compatible = "ralink,rt5350-soc";
} else {
- panic("rt305x: unknown SoC, n0:%08x n1:%08x\n", n0, n1);
+ panic("rt305x: unknown SoC, n0:%08x n1:%08x", n0, n1);
}
id = __raw_readl(sysc + SYSC_REG_CHIP_ID);
@@ -239,4 +286,15 @@ void prom_soc_init(struct ralink_soc_info *soc_info)
name,
(id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
(id & CHIP_ID_REV_MASK));
+
+ soc_info->mem_base = RT305X_SDRAM_BASE;
+ if (soc_is_rt5350()) {
+ soc_info->mem_size = rt5350_get_mem_size();
+ } else if (soc_is_rt305x() || soc_is_rt3350()) {
+ soc_info->mem_size_min = RT305X_MEM_SIZE_MIN;
+ soc_info->mem_size_max = RT305X_MEM_SIZE_MAX;
+ } else if (soc_is_rt3352()) {
+ soc_info->mem_size_min = RT3352_MEM_SIZE_MIN;
+ soc_info->mem_size_max = RT3352_MEM_SIZE_MAX;
+ }
}
diff --git a/arch/mips/ralink/rt3883.c b/arch/mips/ralink/rt3883.c
new file mode 100644
index 00000000000..b474ac284b8
--- /dev/null
+++ b/arch/mips/ralink/rt3883.c
@@ -0,0 +1,246 @@
+/*
+ * 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.
+ *
+ * Parts of this file are based on Ralink's 2.6.21 BSP
+ *
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/mipsregs.h>
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/rt3883.h>
+
+#include "common.h"
+
+static struct ralink_pinmux_grp mode_mux[] = {
+ {
+ .name = "i2c",
+ .mask = RT3883_GPIO_MODE_I2C,
+ .gpio_first = RT3883_GPIO_I2C_SD,
+ .gpio_last = RT3883_GPIO_I2C_SCLK,
+ }, {
+ .name = "spi",
+ .mask = RT3883_GPIO_MODE_SPI,
+ .gpio_first = RT3883_GPIO_SPI_CS0,
+ .gpio_last = RT3883_GPIO_SPI_MISO,
+ }, {
+ .name = "uartlite",
+ .mask = RT3883_GPIO_MODE_UART1,
+ .gpio_first = RT3883_GPIO_UART1_TXD,
+ .gpio_last = RT3883_GPIO_UART1_RXD,
+ }, {
+ .name = "jtag",
+ .mask = RT3883_GPIO_MODE_JTAG,
+ .gpio_first = RT3883_GPIO_JTAG_TDO,
+ .gpio_last = RT3883_GPIO_JTAG_TCLK,
+ }, {
+ .name = "mdio",
+ .mask = RT3883_GPIO_MODE_MDIO,
+ .gpio_first = RT3883_GPIO_MDIO_MDC,
+ .gpio_last = RT3883_GPIO_MDIO_MDIO,
+ }, {
+ .name = "ge1",
+ .mask = RT3883_GPIO_MODE_GE1,
+ .gpio_first = RT3883_GPIO_GE1_TXD0,
+ .gpio_last = RT3883_GPIO_GE1_RXCLK,
+ }, {
+ .name = "ge2",
+ .mask = RT3883_GPIO_MODE_GE2,
+ .gpio_first = RT3883_GPIO_GE2_TXD0,
+ .gpio_last = RT3883_GPIO_GE2_RXCLK,
+ }, {
+ .name = "pci",
+ .mask = RT3883_GPIO_MODE_PCI,
+ .gpio_first = RT3883_GPIO_PCI_AD0,
+ .gpio_last = RT3883_GPIO_PCI_AD31,
+ }, {
+ .name = "lna a",
+ .mask = RT3883_GPIO_MODE_LNA_A,
+ .gpio_first = RT3883_GPIO_LNA_PE_A0,
+ .gpio_last = RT3883_GPIO_LNA_PE_A2,
+ }, {
+ .name = "lna g",
+ .mask = RT3883_GPIO_MODE_LNA_G,
+ .gpio_first = RT3883_GPIO_LNA_PE_G0,
+ .gpio_last = RT3883_GPIO_LNA_PE_G2,
+ }, {0}
+};
+
+static struct ralink_pinmux_grp uart_mux[] = {
+ {
+ .name = "uartf",
+ .mask = RT3883_GPIO_MODE_UARTF,
+ .gpio_first = RT3883_GPIO_7,
+ .gpio_last = RT3883_GPIO_14,
+ }, {
+ .name = "pcm uartf",
+ .mask = RT3883_GPIO_MODE_PCM_UARTF,
+ .gpio_first = RT3883_GPIO_7,
+ .gpio_last = RT3883_GPIO_14,
+ }, {
+ .name = "pcm i2s",
+ .mask = RT3883_GPIO_MODE_PCM_I2S,
+ .gpio_first = RT3883_GPIO_7,
+ .gpio_last = RT3883_GPIO_14,
+ }, {
+ .name = "i2s uartf",
+ .mask = RT3883_GPIO_MODE_I2S_UARTF,
+ .gpio_first = RT3883_GPIO_7,
+ .gpio_last = RT3883_GPIO_14,
+ }, {
+ .name = "pcm gpio",
+ .mask = RT3883_GPIO_MODE_PCM_GPIO,
+ .gpio_first = RT3883_GPIO_11,
+ .gpio_last = RT3883_GPIO_14,
+ }, {
+ .name = "gpio uartf",
+ .mask = RT3883_GPIO_MODE_GPIO_UARTF,
+ .gpio_first = RT3883_GPIO_7,
+ .gpio_last = RT3883_GPIO_10,
+ }, {
+ .name = "gpio i2s",
+ .mask = RT3883_GPIO_MODE_GPIO_I2S,
+ .gpio_first = RT3883_GPIO_7,
+ .gpio_last = RT3883_GPIO_10,
+ }, {
+ .name = "gpio",
+ .mask = RT3883_GPIO_MODE_GPIO,
+ }, {0}
+};
+
+static struct ralink_pinmux_grp pci_mux[] = {
+ {
+ .name = "pci-dev",
+ .mask = 0,
+ .gpio_first = RT3883_GPIO_PCI_AD0,
+ .gpio_last = RT3883_GPIO_PCI_AD31,
+ }, {
+ .name = "pci-host2",
+ .mask = 1,
+ .gpio_first = RT3883_GPIO_PCI_AD0,
+ .gpio_last = RT3883_GPIO_PCI_AD31,
+ }, {
+ .name = "pci-host1",
+ .mask = 2,
+ .gpio_first = RT3883_GPIO_PCI_AD0,
+ .gpio_last = RT3883_GPIO_PCI_AD31,
+ }, {
+ .name = "pci-fnc",
+ .mask = 3,
+ .gpio_first = RT3883_GPIO_PCI_AD0,
+ .gpio_last = RT3883_GPIO_PCI_AD31,
+ }, {
+ .name = "pci-gpio",
+ .mask = 7,
+ .gpio_first = RT3883_GPIO_PCI_AD0,
+ .gpio_last = RT3883_GPIO_PCI_AD31,
+ }, {0}
+};
+
+static void rt3883_wdt_reset(void)
+{
+ u32 t;
+
+ /* enable WDT reset output on GPIO 2 */
+ t = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
+ t |= RT3883_SYSCFG1_GPIO2_AS_WDT_OUT;
+ rt_sysc_w32(t, RT3883_SYSC_REG_SYSCFG1);
+}
+
+struct ralink_pinmux rt_gpio_pinmux = {
+ .mode = mode_mux,
+ .uart = uart_mux,
+ .uart_shift = RT3883_GPIO_MODE_UART0_SHIFT,
+ .uart_mask = RT3883_GPIO_MODE_UART0_MASK,
+ .wdt_reset = rt3883_wdt_reset,
+ .pci = pci_mux,
+ .pci_shift = RT3883_GPIO_MODE_PCI_SHIFT,
+ .pci_mask = RT3883_GPIO_MODE_PCI_MASK,
+};
+
+void __init ralink_clk_init(void)
+{
+ unsigned long cpu_rate, sys_rate;
+ u32 syscfg0;
+ u32 clksel;
+ u32 ddr2;
+
+ syscfg0 = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG0);
+ clksel = ((syscfg0 >> RT3883_SYSCFG0_CPUCLK_SHIFT) &
+ RT3883_SYSCFG0_CPUCLK_MASK);
+ ddr2 = syscfg0 & RT3883_SYSCFG0_DRAM_TYPE_DDR2;
+
+ switch (clksel) {
+ case RT3883_SYSCFG0_CPUCLK_250:
+ cpu_rate = 250000000;
+ sys_rate = (ddr2) ? 125000000 : 83000000;
+ break;
+ case RT3883_SYSCFG0_CPUCLK_384:
+ cpu_rate = 384000000;
+ sys_rate = (ddr2) ? 128000000 : 96000000;
+ break;
+ case RT3883_SYSCFG0_CPUCLK_480:
+ cpu_rate = 480000000;
+ sys_rate = (ddr2) ? 160000000 : 120000000;
+ break;
+ case RT3883_SYSCFG0_CPUCLK_500:
+ cpu_rate = 500000000;
+ sys_rate = (ddr2) ? 166000000 : 125000000;
+ break;
+ }
+
+ ralink_clk_add("cpu", cpu_rate);
+ ralink_clk_add("10000100.timer", sys_rate);
+ ralink_clk_add("10000120.watchdog", sys_rate);
+ ralink_clk_add("10000500.uart", 40000000);
+ ralink_clk_add("10000b00.spi", sys_rate);
+ ralink_clk_add("10000c00.uartlite", 40000000);
+ ralink_clk_add("10100000.ethernet", sys_rate);
+}
+
+void __init ralink_of_remap(void)
+{
+ rt_sysc_membase = plat_of_remap_node("ralink,rt3883-sysc");
+ rt_memc_membase = plat_of_remap_node("ralink,rt3883-memc");
+
+ if (!rt_sysc_membase || !rt_memc_membase)
+ panic("Failed to remap core resources");
+}
+
+void prom_soc_init(struct ralink_soc_info *soc_info)
+{
+ void __iomem *sysc = (void __iomem *) KSEG1ADDR(RT3883_SYSC_BASE);
+ const char *name;
+ u32 n0;
+ u32 n1;
+ u32 id;
+
+ n0 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID0_3);
+ n1 = __raw_readl(sysc + RT3883_SYSC_REG_CHIPID4_7);
+ id = __raw_readl(sysc + RT3883_SYSC_REG_REVID);
+
+ if (n0 == RT3883_CHIP_NAME0 && n1 == RT3883_CHIP_NAME1) {
+ soc_info->compatible = "ralink,rt3883-soc";
+ name = "RT3883";
+ } else {
+ panic("rt3883: unknown SoC, n0:%08x n1:%08x", n0, n1);
+ }
+
+ snprintf(soc_info->sys_type, RAMIPS_SYS_TYPE_LEN,
+ "Ralink %s ver:%u eco:%u",
+ name,
+ (id >> RT3883_REVID_VER_ID_SHIFT) & RT3883_REVID_VER_ID_MASK,
+ (id & RT3883_REVID_ECO_ID_MASK));
+
+ soc_info->mem_base = RT3883_SDRAM_BASE;
+ soc_info->mem_size_min = RT3883_MEM_SIZE_MIN;
+ soc_info->mem_size_max = RT3883_MEM_SIZE_MAX;
+}
diff --git a/arch/mips/ralink/timer.c b/arch/mips/ralink/timer.c
new file mode 100644
index 00000000000..e38692a44e6
--- /dev/null
+++ b/arch/mips/ralink/timer.c
@@ -0,0 +1,185 @@
+/*
+ * 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) 2013 John Crispin <blogic@openwrt.org>
+*/
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/of_gpio.h>
+#include <linux/clk.h>
+
+#include <asm/mach-ralink/ralink_regs.h>
+
+#define TIMER_REG_TMRSTAT 0x00
+#define TIMER_REG_TMR0LOAD 0x10
+#define TIMER_REG_TMR0CTL 0x18
+
+#define TMRSTAT_TMR0INT BIT(0)
+
+#define TMR0CTL_ENABLE BIT(7)
+#define TMR0CTL_MODE_PERIODIC BIT(4)
+#define TMR0CTL_PRESCALER 1
+#define TMR0CTL_PRESCALE_VAL (0xf - TMR0CTL_PRESCALER)
+#define TMR0CTL_PRESCALE_DIV (65536 / BIT(TMR0CTL_PRESCALER))
+
+struct rt_timer {
+ struct device *dev;
+ void __iomem *membase;
+ int irq;
+ unsigned long timer_freq;
+ unsigned long timer_div;
+};
+
+static inline void rt_timer_w32(struct rt_timer *rt, u8 reg, u32 val)
+{
+ __raw_writel(val, rt->membase + reg);
+}
+
+static inline u32 rt_timer_r32(struct rt_timer *rt, u8 reg)
+{
+ return __raw_readl(rt->membase + reg);
+}
+
+static irqreturn_t rt_timer_irq(int irq, void *_rt)
+{
+ struct rt_timer *rt = (struct rt_timer *) _rt;
+
+ rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div);
+ rt_timer_w32(rt, TIMER_REG_TMRSTAT, TMRSTAT_TMR0INT);
+
+ return IRQ_HANDLED;
+}
+
+
+static int rt_timer_request(struct rt_timer *rt)
+{
+ int err = request_irq(rt->irq, rt_timer_irq, IRQF_DISABLED,
+ dev_name(rt->dev), rt);
+ if (err) {
+ dev_err(rt->dev, "failed to request irq\n");
+ } else {
+ u32 t = TMR0CTL_MODE_PERIODIC | TMR0CTL_PRESCALE_VAL;
+ rt_timer_w32(rt, TIMER_REG_TMR0CTL, t);
+ }
+ return err;
+}
+
+static void rt_timer_free(struct rt_timer *rt)
+{
+ free_irq(rt->irq, rt);
+}
+
+static int rt_timer_config(struct rt_timer *rt, unsigned long divisor)
+{
+ if (rt->timer_freq < divisor)
+ rt->timer_div = rt->timer_freq;
+ else
+ rt->timer_div = divisor;
+
+ rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div);
+
+ return 0;
+}
+
+static int rt_timer_enable(struct rt_timer *rt)
+{
+ u32 t;
+
+ rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div);
+
+ t = rt_timer_r32(rt, TIMER_REG_TMR0CTL);
+ t |= TMR0CTL_ENABLE;
+ rt_timer_w32(rt, TIMER_REG_TMR0CTL, t);
+
+ return 0;
+}
+
+static void rt_timer_disable(struct rt_timer *rt)
+{
+ u32 t;
+
+ t = rt_timer_r32(rt, TIMER_REG_TMR0CTL);
+ t &= ~TMR0CTL_ENABLE;
+ rt_timer_w32(rt, TIMER_REG_TMR0CTL, t);
+}
+
+static int rt_timer_probe(struct platform_device *pdev)
+{
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ struct rt_timer *rt;
+ struct clk *clk;
+
+ rt = devm_kzalloc(&pdev->dev, sizeof(*rt), GFP_KERNEL);
+ if (!rt) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ rt->irq = platform_get_irq(pdev, 0);
+ if (!rt->irq) {
+ dev_err(&pdev->dev, "failed to load irq\n");
+ return -ENOENT;
+ }
+
+ rt->membase = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(rt->membase))
+ return PTR_ERR(rt->membase);
+
+ clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "failed get clock rate\n");
+ return PTR_ERR(clk);
+ }
+
+ rt->timer_freq = clk_get_rate(clk) / TMR0CTL_PRESCALE_DIV;
+ if (!rt->timer_freq)
+ return -EINVAL;
+
+ rt->dev = &pdev->dev;
+ platform_set_drvdata(pdev, rt);
+
+ rt_timer_request(rt);
+ rt_timer_config(rt, 2);
+ rt_timer_enable(rt);
+
+ dev_info(&pdev->dev, "maximum frequency is %luHz\n", rt->timer_freq);
+
+ return 0;
+}
+
+static int rt_timer_remove(struct platform_device *pdev)
+{
+ struct rt_timer *rt = platform_get_drvdata(pdev);
+
+ rt_timer_disable(rt);
+ rt_timer_free(rt);
+
+ return 0;
+}
+
+static const struct of_device_id rt_timer_match[] = {
+ { .compatible = "ralink,rt2880-timer" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, rt_timer_match);
+
+static struct platform_driver rt_timer_driver = {
+ .probe = rt_timer_probe,
+ .remove = rt_timer_remove,
+ .driver = {
+ .name = "rt-timer",
+ .owner = THIS_MODULE,
+ .of_match_table = rt_timer_match
+ },
+};
+
+module_platform_driver(rt_timer_driver);
+
+MODULE_DESCRIPTION("Ralink RT2880 timer");
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-14 00:36:39 +0000