9 files changed, 1097 insertions, 0 deletions
diff --git a/arch/mips/pic32/pic32mzda/Makefile b/arch/mips/pic32/pic32mzda/Makefile
new file mode 100644
index 000000000..3b505142b
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Joshua Henderson, <joshua.henderson@microchip.com>
+# Copyright (C) 2015 Microchip Technology, Inc.  All rights reserved.
+#
+obj-y			:= config.o early_clk.o init.o time.o
+
+obj-$(CONFIG_EARLY_PRINTK)	+= early_console.o      \
+				   early_pin.o
diff --git a/arch/mips/pic32/pic32mzda/config.c b/arch/mips/pic32/pic32mzda/config.c
new file mode 100644
index 000000000..f69532007
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/config.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Purna Chandra Mandal, purna.mandal@microchip.com
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach-pic32/pic32.h>
+
+#include "pic32mzda.h"
+
+#define PIC32_CFGCON	0x0000
+#define PIC32_DEVID	0x0020
+#define PIC32_SYSKEY	0x0030
+#define PIC32_CFGEBIA	0x00c0
+#define PIC32_CFGEBIC	0x00d0
+#define PIC32_CFGCON2	0x00f0
+#define PIC32_RCON	0x1240
+
+static void __iomem *pic32_conf_base;
+static DEFINE_SPINLOCK(config_lock);
+static u32 pic32_reset_status;
+
+static u32 pic32_conf_get_reg_field(u32 offset, u32 rshift, u32 mask)
+{
+	u32 v;
+
+	v = readl(pic32_conf_base + offset);
+	v >>= rshift;
+	v &= mask;
+
+	return v;
+}
+
+static u32 pic32_conf_modify_atomic(u32 offset, u32 mask, u32 set)
+{
+	u32 v;
+	unsigned long flags;
+
+	spin_lock_irqsave(&config_lock, flags);
+	v = readl(pic32_conf_base + offset);
+	v &= ~mask;
+	v |= (set & mask);
+	writel(v, pic32_conf_base + offset);
+	spin_unlock_irqrestore(&config_lock, flags);
+
+	return 0;
+}
+
+int pic32_enable_lcd(void)
+{
+	return pic32_conf_modify_atomic(PIC32_CFGCON2, BIT(31), BIT(31));
+}
+
+int pic32_disable_lcd(void)
+{
+	return pic32_conf_modify_atomic(PIC32_CFGCON2, BIT(31), 0);
+}
+
+int pic32_set_lcd_mode(int mode)
+{
+	u32 mask = mode ? BIT(30) : 0;
+
+	return pic32_conf_modify_atomic(PIC32_CFGCON2, BIT(30), mask);
+}
+
+int pic32_set_sdhci_adma_fifo_threshold(u32 rthrsh, u32 wthrsh)
+{
+	u32 clr, set;
+
+	clr = (0x3ff << 4) | (0x3ff << 16);
+	set = (rthrsh << 4) | (wthrsh << 16);
+	return pic32_conf_modify_atomic(PIC32_CFGCON2, clr, set);
+}
+
+void pic32_syskey_unlock_debug(const char *func, const ulong line)
+{
+	void __iomem *syskey = pic32_conf_base + PIC32_SYSKEY;
+
+	pr_debug("%s: called from %s:%lu\n", __func__, func, line);
+	writel(0x00000000, syskey);
+	writel(0xAA996655, syskey);
+	writel(0x556699AA, syskey);
+}
+
+static u32 pic32_get_device_id(void)
+{
+	return pic32_conf_get_reg_field(PIC32_DEVID, 0, 0x0fffffff);
+}
+
+static u32 pic32_get_device_version(void)
+{
+	return pic32_conf_get_reg_field(PIC32_DEVID, 28, 0xf);
+}
+
+u32 pic32_get_boot_status(void)
+{
+	return pic32_reset_status;
+}
+EXPORT_SYMBOL(pic32_get_boot_status);
+
+void __init pic32_config_init(void)
+{
+	pic32_conf_base = ioremap(PIC32_BASE_CONFIG, 0x110);
+	if (!pic32_conf_base)
+		panic("pic32: config base not mapped");
+
+	/* Boot Status */
+	pic32_reset_status = readl(pic32_conf_base + PIC32_RCON);
+	writel(-1, PIC32_CLR(pic32_conf_base + PIC32_RCON));
+
+	/* Device Information */
+	pr_info("Device Id: 0x%08x, Device Ver: 0x%04x\n",
+		pic32_get_device_id(),
+		pic32_get_device_version());
+}
diff --git a/arch/mips/pic32/pic32mzda/early_clk.c b/arch/mips/pic32/pic32mzda/early_clk.c
new file mode 100644
index 000000000..6001e507d
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/early_clk.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#include <asm/mach-pic32/pic32.h>
+
+#include "pic32mzda.h"
+
+/* Oscillators, PLL & clocks */
+#define ICLK_MASK	0x00000080
+#define PLLDIV_MASK	0x00000007
+#define CUROSC_MASK	0x00000007
+#define PLLMUL_MASK	0x0000007F
+#define PB_MASK		0x00000007
+#define FRC1		0
+#define FRC2		7
+#define SPLL		1
+#define POSC		2
+#define FRC_CLK		8000000
+
+#define PIC32_POSC_FREQ	24000000
+
+#define OSCCON		0x0000
+#define SPLLCON		0x0020
+#define PB1DIV		0x0140
+
+u32 pic32_get_sysclk(void)
+{
+	u32 osc_freq = 0;
+	u32 pllclk;
+	u32 frcdivn;
+	u32 osccon;
+	u32 spllcon;
+	int curr_osc;
+
+	u32 plliclk;
+	u32 pllidiv;
+	u32 pllodiv;
+	u32 pllmult;
+	u32 frcdiv;
+
+	void __iomem *osc_base = ioremap(PIC32_BASE_OSC, 0x200);
+
+	osccon = __raw_readl(osc_base + OSCCON);
+	spllcon = __raw_readl(osc_base + SPLLCON);
+
+	plliclk = (spllcon & ICLK_MASK);
+	pllidiv = ((spllcon >> 8) & PLLDIV_MASK) + 1;
+	pllodiv = ((spllcon >> 24) & PLLDIV_MASK);
+	pllmult = ((spllcon >> 16) & PLLMUL_MASK) + 1;
+	frcdiv = ((osccon >> 24) & PLLDIV_MASK);
+
+	pllclk = plliclk ? FRC_CLK : PIC32_POSC_FREQ;
+	frcdivn = ((1 << frcdiv) + 1) + (128 * (frcdiv == 7));
+
+	if (pllodiv < 2)
+		pllodiv = 2;
+	else if (pllodiv < 5)
+		pllodiv = (1 << pllodiv);
+	else
+		pllodiv = 32;
+
+	curr_osc = (int)((osccon >> 12) & CUROSC_MASK);
+
+	switch (curr_osc) {
+	case FRC1:
+	case FRC2:
+		osc_freq = FRC_CLK / frcdivn;
+		break;
+	case SPLL:
+		osc_freq = ((pllclk / pllidiv) * pllmult) / pllodiv;
+		break;
+	case POSC:
+		osc_freq = PIC32_POSC_FREQ;
+		break;
+	default:
+		break;
+	}
+
+	iounmap(osc_base);
+
+	return osc_freq;
+}
+
+u32 pic32_get_pbclk(int bus)
+{
+	u32 clk_freq;
+	void __iomem *osc_base = ioremap(PIC32_BASE_OSC, 0x200);
+	u32 pbxdiv = PB1DIV + ((bus - 1) * 0x10);
+	u32 pbdiv = (__raw_readl(osc_base + pbxdiv) & PB_MASK) + 1;
+
+	iounmap(osc_base);
+
+	clk_freq = pic32_get_sysclk();
+
+	return clk_freq / pbdiv;
+}
diff --git a/arch/mips/pic32/pic32mzda/early_console.c b/arch/mips/pic32/pic32mzda/early_console.c
new file mode 100644
index 000000000..3cd1b408f
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/early_console.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#include <asm/mach-pic32/pic32.h>
+#include <asm/fw/fw.h>
+#include <asm/setup.h>
+
+#include "pic32mzda.h"
+#include "early_pin.h"
+
+/* Default early console parameters */
+#define EARLY_CONSOLE_PORT	1
+#define EARLY_CONSOLE_BAUDRATE	115200
+
+#define UART_ENABLE		BIT(15)
+#define UART_ENABLE_RX		BIT(12)
+#define UART_ENABLE_TX		BIT(10)
+#define UART_TX_FULL		BIT(9)
+
+/* UART1(x == 0) - UART6(x == 5) */
+#define UART_BASE(x)	((x) * 0x0200)
+#define U_MODE(x)	UART_BASE(x)
+#define U_STA(x)	(UART_BASE(x) + 0x10)
+#define U_TXR(x)	(UART_BASE(x) + 0x20)
+#define U_BRG(x)	(UART_BASE(x) + 0x40)
+
+static void __iomem *uart_base;
+static int console_port = -1;
+
+static int __init configure_uart_pins(int port)
+{
+	switch (port) {
+	case 1:
+		pic32_pps_input(IN_FUNC_U2RX, IN_RPB0);
+		pic32_pps_output(OUT_FUNC_U2TX, OUT_RPG9);
+		break;
+	case 5:
+		pic32_pps_input(IN_FUNC_U6RX, IN_RPD0);
+		pic32_pps_output(OUT_FUNC_U6TX, OUT_RPB8);
+		break;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+static void __init configure_uart(int port, int baud)
+{
+	u32 pbclk;
+
+	pbclk = pic32_get_pbclk(2);
+
+	__raw_writel(0, uart_base + U_MODE(port));
+	__raw_writel(((pbclk / baud) / 16) - 1, uart_base + U_BRG(port));
+	__raw_writel(UART_ENABLE, uart_base + U_MODE(port));
+	__raw_writel(UART_ENABLE_TX | UART_ENABLE_RX,
+		     uart_base + PIC32_SET(U_STA(port)));
+}
+
+static void __init setup_early_console(int port, int baud)
+{
+	if (configure_uart_pins(port))
+		return;
+
+	console_port = port;
+	configure_uart(console_port, baud);
+}
+
+static char * __init pic32_getcmdline(void)
+{
+	/*
+	 * arch_mem_init() has not been called yet, so we don't have a real
+	 * command line setup if using CONFIG_CMDLINE_BOOL.
+	 */
+#ifdef CONFIG_CMDLINE_OVERRIDE
+	return CONFIG_CMDLINE;
+#else
+	return fw_getcmdline();
+#endif
+}
+
+static int __init get_port_from_cmdline(char *arch_cmdline)
+{
+	char *s;
+	int port = -1;
+
+	if (!arch_cmdline || *arch_cmdline == '\0')
+		goto _out;
+
+	s = strstr(arch_cmdline, "earlyprintk=");
+	if (s) {
+		s = strstr(s, "ttyS");
+		if (s)
+			s += 4;
+		else
+			goto _out;
+
+		port = (*s) - '0';
+	}
+
+_out:
+	return port;
+}
+
+static int __init get_baud_from_cmdline(char *arch_cmdline)
+{
+	char *s;
+	int baud = -1;
+
+	if (!arch_cmdline || *arch_cmdline == '\0')
+		goto _out;
+
+	s = strstr(arch_cmdline, "earlyprintk=");
+	if (s) {
+		s = strstr(s, "ttyS");
+		if (s)
+			s += 6;
+		else
+			goto _out;
+
+		baud = 0;
+		while (*s >= '0' && *s <= '9')
+			baud = baud * 10 + *s++ - '0';
+	}
+
+_out:
+	return baud;
+}
+
+void __init fw_init_early_console(void)
+{
+	char *arch_cmdline = pic32_getcmdline();
+	int baud, port;
+
+	uart_base = ioremap(PIC32_BASE_UART, 0xc00);
+
+	baud = get_baud_from_cmdline(arch_cmdline);
+	port = get_port_from_cmdline(arch_cmdline);
+
+	if (port == -1)
+		port = EARLY_CONSOLE_PORT;
+
+	if (baud == -1)
+		baud = EARLY_CONSOLE_BAUDRATE;
+
+	setup_early_console(port, baud);
+}
+
+void prom_putchar(char c)
+{
+	if (console_port >= 0) {
+		while (__raw_readl(
+				uart_base + U_STA(console_port)) & UART_TX_FULL)
+			;
+
+		__raw_writel(c, uart_base + U_TXR(console_port));
+	}
+}
diff --git a/arch/mips/pic32/pic32mzda/early_pin.c b/arch/mips/pic32/pic32mzda/early_pin.c
new file mode 100644
index 000000000..f2822632b
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/early_pin.c
@@ -0,0 +1,267 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#include <asm/io.h>
+
+#include "early_pin.h"
+
+#define PPS_BASE 0x1f800000
+
+/* Input PPS Registers */
+#define INT1R 0x1404
+#define INT2R 0x1408
+#define INT3R 0x140C
+#define INT4R 0x1410
+#define T2CKR 0x1418
+#define T3CKR 0x141C
+#define T4CKR 0x1420
+#define T5CKR 0x1424
+#define T6CKR 0x1428
+#define T7CKR 0x142C
+#define T8CKR 0x1430
+#define T9CKR 0x1434
+#define IC1R 0x1438
+#define IC2R 0x143C
+#define IC3R 0x1440
+#define IC4R 0x1444
+#define IC5R 0x1448
+#define IC6R 0x144C
+#define IC7R 0x1450
+#define IC8R 0x1454
+#define IC9R 0x1458
+#define OCFAR 0x1460
+#define U1RXR 0x1468
+#define U1CTSR 0x146C
+#define U2RXR 0x1470
+#define U2CTSR 0x1474
+#define U3RXR 0x1478
+#define U3CTSR 0x147C
+#define U4RXR 0x1480
+#define U4CTSR 0x1484
+#define U5RXR 0x1488
+#define U5CTSR 0x148C
+#define U6RXR 0x1490
+#define U6CTSR 0x1494
+#define SDI1R 0x149C
+#define SS1R 0x14A0
+#define SDI2R 0x14A8
+#define SS2R 0x14AC
+#define SDI3R 0x14B4
+#define SS3R 0x14B8
+#define SDI4R 0x14C0
+#define SS4R 0x14C4
+#define SDI5R 0x14CC
+#define SS5R 0x14D0
+#define SDI6R 0x14D8
+#define SS6R 0x14DC
+#define C1RXR 0x14E0
+#define C2RXR 0x14E4
+#define REFCLKI1R 0x14E8
+#define REFCLKI3R 0x14F0
+#define REFCLKI4R 0x14F4
+
+static const struct
+{
+	int function;
+	int reg;
+} input_pin_reg[] = {
+	{ IN_FUNC_INT3, INT3R },
+	{ IN_FUNC_T2CK, T2CKR },
+	{ IN_FUNC_T6CK, T6CKR },
+	{ IN_FUNC_IC3, IC3R  },
+	{ IN_FUNC_IC7, IC7R },
+	{ IN_FUNC_U1RX, U1RXR },
+	{ IN_FUNC_U2CTS, U2CTSR },
+	{ IN_FUNC_U5RX, U5RXR },
+	{ IN_FUNC_U6CTS, U6CTSR },
+	{ IN_FUNC_SDI1, SDI1R },
+	{ IN_FUNC_SDI3, SDI3R },
+	{ IN_FUNC_SDI5, SDI5R },
+	{ IN_FUNC_SS6, SS6R },
+	{ IN_FUNC_REFCLKI1, REFCLKI1R },
+	{ IN_FUNC_INT4, INT4R },
+	{ IN_FUNC_T5CK, T5CKR },
+	{ IN_FUNC_T7CK, T7CKR },
+	{ IN_FUNC_IC4, IC4R },
+	{ IN_FUNC_IC8, IC8R },
+	{ IN_FUNC_U3RX, U3RXR },
+	{ IN_FUNC_U4CTS, U4CTSR },
+	{ IN_FUNC_SDI2, SDI2R },
+	{ IN_FUNC_SDI4, SDI4R },
+	{ IN_FUNC_C1RX, C1RXR },
+	{ IN_FUNC_REFCLKI4, REFCLKI4R },
+	{ IN_FUNC_INT2, INT2R },
+	{ IN_FUNC_T3CK, T3CKR },
+	{ IN_FUNC_T8CK, T8CKR },
+	{ IN_FUNC_IC2, IC2R },
+	{ IN_FUNC_IC5, IC5R },
+	{ IN_FUNC_IC9, IC9R },
+	{ IN_FUNC_U1CTS, U1CTSR },
+	{ IN_FUNC_U2RX, U2RXR },
+	{ IN_FUNC_U5CTS, U5CTSR },
+	{ IN_FUNC_SS1, SS1R },
+	{ IN_FUNC_SS3, SS3R },
+	{ IN_FUNC_SS4, SS4R },
+	{ IN_FUNC_SS5, SS5R },
+	{ IN_FUNC_C2RX, C2RXR },
+	{ IN_FUNC_INT1, INT1R },
+	{ IN_FUNC_T4CK, T4CKR },
+	{ IN_FUNC_T9CK, T9CKR },
+	{ IN_FUNC_IC1, IC1R },
+	{ IN_FUNC_IC6, IC6R },
+	{ IN_FUNC_U3CTS, U3CTSR },
+	{ IN_FUNC_U4RX, U4RXR },
+	{ IN_FUNC_U6RX, U6RXR },
+	{ IN_FUNC_SS2, SS2R },
+	{ IN_FUNC_SDI6, SDI6R },
+	{ IN_FUNC_OCFA, OCFAR },
+	{ IN_FUNC_REFCLKI3, REFCLKI3R },
+};
+
+void pic32_pps_input(int function, int pin)
+{
+	void __iomem *pps_base = ioremap(PPS_BASE, 0xF4);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(input_pin_reg); i++) {
+		if (input_pin_reg[i].function == function) {
+			__raw_writel(pin, pps_base + input_pin_reg[i].reg);
+			return;
+		}
+	}
+
+	iounmap(pps_base);
+}
+
+/* Output PPS Registers */
+#define RPA14R 0x1538
+#define RPA15R 0x153C
+#define RPB0R 0x1540
+#define RPB1R 0x1544
+#define RPB2R 0x1548
+#define RPB3R 0x154C
+#define RPB5R 0x1554
+#define RPB6R 0x1558
+#define RPB7R 0x155C
+#define RPB8R 0x1560
+#define RPB9R 0x1564
+#define RPB10R 0x1568
+#define RPB14R 0x1578
+#define RPB15R 0x157C
+#define RPC1R 0x1584
+#define RPC2R 0x1588
+#define RPC3R 0x158C
+#define RPC4R 0x1590
+#define RPC13R 0x15B4
+#define RPC14R 0x15B8
+#define RPD0R 0x15C0
+#define RPD1R 0x15C4
+#define RPD2R 0x15C8
+#define RPD3R 0x15CC
+#define RPD4R 0x15D0
+#define RPD5R 0x15D4
+#define RPD6R 0x15D8
+#define RPD7R 0x15DC
+#define RPD9R 0x15E4
+#define RPD10R 0x15E8
+#define RPD11R 0x15EC
+#define RPD12R 0x15F0
+#define RPD14R 0x15F8
+#define RPD15R 0x15FC
+#define RPE3R 0x160C
+#define RPE5R 0x1614
+#define RPE8R 0x1620
+#define RPE9R 0x1624
+#define RPF0R 0x1640
+#define RPF1R 0x1644
+#define RPF2R 0x1648
+#define RPF3R 0x164C
+#define RPF4R 0x1650
+#define RPF5R 0x1654
+#define RPF8R 0x1660
+#define RPF12R 0x1670
+#define RPF13R 0x1674
+#define RPG0R 0x1680
+#define RPG1R 0x1684
+#define RPG6R 0x1698
+#define RPG7R 0x169C
+#define RPG8R 0x16A0
+#define RPG9R 0x16A4
+
+static const struct
+{
+	int pin;
+	int reg;
+} output_pin_reg[] = {
+	{ OUT_RPD2, RPD2R },
+	{ OUT_RPG8, RPG8R },
+	{ OUT_RPF4, RPF4R },
+	{ OUT_RPD10, RPD10R },
+	{ OUT_RPF1, RPF1R },
+	{ OUT_RPB9, RPB9R },
+	{ OUT_RPB10, RPB10R },
+	{ OUT_RPC14, RPC14R },
+	{ OUT_RPB5, RPB5R },
+	{ OUT_RPC1, RPC1R },
+	{ OUT_RPD14, RPD14R },
+	{ OUT_RPG1, RPG1R },
+	{ OUT_RPA14, RPA14R },
+	{ OUT_RPD6, RPD6R },
+	{ OUT_RPD3, RPD3R },
+	{ OUT_RPG7, RPG7R },
+	{ OUT_RPF5, RPF5R },
+	{ OUT_RPD11, RPD11R },
+	{ OUT_RPF0, RPF0R },
+	{ OUT_RPB1, RPB1R },
+	{ OUT_RPE5, RPE5R },
+	{ OUT_RPC13, RPC13R },
+	{ OUT_RPB3, RPB3R },
+	{ OUT_RPC4, RPC4R },
+	{ OUT_RPD15, RPD15R },
+	{ OUT_RPG0, RPG0R },
+	{ OUT_RPA15, RPA15R },
+	{ OUT_RPD7, RPD7R },
+	{ OUT_RPD9, RPD9R },
+	{ OUT_RPG6, RPG6R },
+	{ OUT_RPB8, RPB8R },
+	{ OUT_RPB15, RPB15R },
+	{ OUT_RPD4, RPD4R },
+	{ OUT_RPB0, RPB0R },
+	{ OUT_RPE3, RPE3R },
+	{ OUT_RPB7, RPB7R },
+	{ OUT_RPF12, RPF12R },
+	{ OUT_RPD12, RPD12R },
+	{ OUT_RPF8, RPF8R },
+	{ OUT_RPC3, RPC3R },
+	{ OUT_RPE9, RPE9R },
+	{ OUT_RPD1, RPD1R },
+	{ OUT_RPG9, RPG9R },
+	{ OUT_RPB14, RPB14R },
+	{ OUT_RPD0, RPD0R },
+	{ OUT_RPB6, RPB6R },
+	{ OUT_RPD5, RPD5R },
+	{ OUT_RPB2, RPB2R },
+	{ OUT_RPF3, RPF3R },
+	{ OUT_RPF13, RPF13R },
+	{ OUT_RPC2, RPC2R },
+	{ OUT_RPE8, RPE8R },
+	{ OUT_RPF2, RPF2R },
+};
+
+void pic32_pps_output(int function, int pin)
+{
+	void __iomem *pps_base = ioremap(PPS_BASE, 0x170);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(output_pin_reg); i++) {
+		if (output_pin_reg[i].pin == pin) {
+			__raw_writel(function,
+				pps_base + output_pin_reg[i].reg);
+			return;
+		}
+	}
+
+	iounmap(pps_base);
+}
diff --git a/arch/mips/pic32/pic32mzda/early_pin.h b/arch/mips/pic32/pic32mzda/early_pin.h
new file mode 100644
index 000000000..60e9c3210
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/early_pin.h
@@ -0,0 +1,233 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#ifndef _PIC32MZDA_EARLY_PIN_H
+#define _PIC32MZDA_EARLY_PIN_H
+
+/*
+ * This is a complete, yet overly simplistic and unoptimized, PIC32MZDA PPS
+ * configuration only useful before we have full pinctrl initialized.
+ */
+
+/* Input PPS Functions */
+enum {
+	IN_FUNC_INT3,
+	IN_FUNC_T2CK,
+	IN_FUNC_T6CK,
+	IN_FUNC_IC3,
+	IN_FUNC_IC7,
+	IN_FUNC_U1RX,
+	IN_FUNC_U2CTS,
+	IN_FUNC_U5RX,
+	IN_FUNC_U6CTS,
+	IN_FUNC_SDI1,
+	IN_FUNC_SDI3,
+	IN_FUNC_SDI5,
+	IN_FUNC_SS6,
+	IN_FUNC_REFCLKI1,
+	IN_FUNC_INT4,
+	IN_FUNC_T5CK,
+	IN_FUNC_T7CK,
+	IN_FUNC_IC4,
+	IN_FUNC_IC8,
+	IN_FUNC_U3RX,
+	IN_FUNC_U4CTS,
+	IN_FUNC_SDI2,
+	IN_FUNC_SDI4,
+	IN_FUNC_C1RX,
+	IN_FUNC_REFCLKI4,
+	IN_FUNC_INT2,
+	IN_FUNC_T3CK,
+	IN_FUNC_T8CK,
+	IN_FUNC_IC2,
+	IN_FUNC_IC5,
+	IN_FUNC_IC9,
+	IN_FUNC_U1CTS,
+	IN_FUNC_U2RX,
+	IN_FUNC_U5CTS,
+	IN_FUNC_SS1,
+	IN_FUNC_SS3,
+	IN_FUNC_SS4,
+	IN_FUNC_SS5,
+	IN_FUNC_C2RX,
+	IN_FUNC_INT1,
+	IN_FUNC_T4CK,
+	IN_FUNC_T9CK,
+	IN_FUNC_IC1,
+	IN_FUNC_IC6,
+	IN_FUNC_U3CTS,
+	IN_FUNC_U4RX,
+	IN_FUNC_U6RX,
+	IN_FUNC_SS2,
+	IN_FUNC_SDI6,
+	IN_FUNC_OCFA,
+	IN_FUNC_REFCLKI3,
+};
+
+/* Input PPS Pins */
+#define IN_RPD2 0x00
+#define IN_RPG8 0x01
+#define IN_RPF4 0x02
+#define IN_RPD10 0x03
+#define IN_RPF1 0x04
+#define IN_RPB9 0x05
+#define IN_RPB10 0x06
+#define IN_RPC14 0x07
+#define IN_RPB5 0x08
+#define IN_RPC1 0x0A
+#define IN_RPD14 0x0B
+#define IN_RPG1 0x0C
+#define IN_RPA14 0x0D
+#define IN_RPD6 0x0E
+#define IN_RPD3 0x00
+#define IN_RPG7 0x01
+#define IN_RPF5 0x02
+#define IN_RPD11 0x03
+#define IN_RPF0 0x04
+#define IN_RPB1 0x05
+#define IN_RPE5 0x06
+#define IN_RPC13 0x07
+#define IN_RPB3 0x08
+#define IN_RPC4 0x0A
+#define IN_RPD15 0x0B
+#define IN_RPG0 0x0C
+#define IN_RPA15 0x0D
+#define IN_RPD7 0x0E
+#define IN_RPD9 0x00
+#define IN_RPG6 0x01
+#define IN_RPB8 0x02
+#define IN_RPB15 0x03
+#define IN_RPD4 0x04
+#define IN_RPB0 0x05
+#define IN_RPE3 0x06
+#define IN_RPB7 0x07
+#define IN_RPF12 0x09
+#define IN_RPD12 0x0A
+#define IN_RPF8 0x0B
+#define IN_RPC3 0x0C
+#define IN_RPE9 0x0D
+#define IN_RPD1 0x00
+#define IN_RPG9 0x01
+#define IN_RPB14 0x02
+#define IN_RPD0 0x03
+#define IN_RPB6 0x05
+#define IN_RPD5 0x06
+#define IN_RPB2 0x07
+#define IN_RPF3 0x08
+#define IN_RPF13 0x09
+#define IN_RPF2 0x0B
+#define IN_RPC2 0x0C
+#define IN_RPE8 0x0D
+
+/* Output PPS Pins */
+enum {
+	OUT_RPD2,
+	OUT_RPG8,
+	OUT_RPF4,
+	OUT_RPD10,
+	OUT_RPF1,
+	OUT_RPB9,
+	OUT_RPB10,
+	OUT_RPC14,
+	OUT_RPB5,
+	OUT_RPC1,
+	OUT_RPD14,
+	OUT_RPG1,
+	OUT_RPA14,
+	OUT_RPD6,
+	OUT_RPD3,
+	OUT_RPG7,
+	OUT_RPF5,
+	OUT_RPD11,
+	OUT_RPF0,
+	OUT_RPB1,
+	OUT_RPE5,
+	OUT_RPC13,
+	OUT_RPB3,
+	OUT_RPC4,
+	OUT_RPD15,
+	OUT_RPG0,
+	OUT_RPA15,
+	OUT_RPD7,
+	OUT_RPD9,
+	OUT_RPG6,
+	OUT_RPB8,
+	OUT_RPB15,
+	OUT_RPD4,
+	OUT_RPB0,
+	OUT_RPE3,
+	OUT_RPB7,
+	OUT_RPF12,
+	OUT_RPD12,
+	OUT_RPF8,
+	OUT_RPC3,
+	OUT_RPE9,
+	OUT_RPD1,
+	OUT_RPG9,
+	OUT_RPB14,
+	OUT_RPD0,
+	OUT_RPB6,
+	OUT_RPD5,
+	OUT_RPB2,
+	OUT_RPF3,
+	OUT_RPF13,
+	OUT_RPC2,
+	OUT_RPE8,
+	OUT_RPF2,
+};
+
+/* Output PPS Functions */
+#define OUT_FUNC_U3TX 0x01
+#define OUT_FUNC_U4RTS 0x02
+#define OUT_FUNC_SDO1 0x05
+#define OUT_FUNC_SDO2 0x06
+#define OUT_FUNC_SDO3 0x07
+#define OUT_FUNC_SDO5 0x09
+#define OUT_FUNC_SS6 0x0A
+#define OUT_FUNC_OC3 0x0B
+#define OUT_FUNC_OC6 0x0C
+#define OUT_FUNC_REFCLKO4 0x0D
+#define OUT_FUNC_C2OUT 0x0E
+#define OUT_FUNC_C1TX 0x0F
+#define OUT_FUNC_U1TX 0x01
+#define OUT_FUNC_U2RTS 0x02
+#define OUT_FUNC_U5TX 0x03
+#define OUT_FUNC_U6RTS 0x04
+#define OUT_FUNC_SDO1 0x05
+#define OUT_FUNC_SDO2 0x06
+#define OUT_FUNC_SDO3 0x07
+#define OUT_FUNC_SDO4 0x08
+#define OUT_FUNC_SDO5 0x09
+#define OUT_FUNC_OC4 0x0B
+#define OUT_FUNC_OC7 0x0C
+#define OUT_FUNC_REFCLKO1 0x0F
+#define OUT_FUNC_U3RTS 0x01
+#define OUT_FUNC_U4TX 0x02
+#define OUT_FUNC_U6TX 0x04
+#define OUT_FUNC_SS1 0x05
+#define OUT_FUNC_SS3 0x07
+#define OUT_FUNC_SS4 0x08
+#define OUT_FUNC_SS5 0x09
+#define OUT_FUNC_SDO6 0x0A
+#define OUT_FUNC_OC5 0x0B
+#define OUT_FUNC_OC8 0x0C
+#define OUT_FUNC_C1OUT 0x0E
+#define OUT_FUNC_REFCLKO3 0x0F
+#define OUT_FUNC_U1RTS 0x01
+#define OUT_FUNC_U2TX 0x02
+#define OUT_FUNC_U5RTS 0x03
+#define OUT_FUNC_U6TX 0x04
+#define OUT_FUNC_SS2 0x06
+#define OUT_FUNC_SDO4 0x08
+#define OUT_FUNC_SDO6 0x0A
+#define OUT_FUNC_OC2 0x0B
+#define OUT_FUNC_OC1 0x0C
+#define OUT_FUNC_OC9 0x0D
+#define OUT_FUNC_C2TX 0x0F
+
+void pic32_pps_input(int function, int pin);
+void pic32_pps_output(int function, int pin);
+
+#endif
diff --git a/arch/mips/pic32/pic32mzda/init.c b/arch/mips/pic32/pic32mzda/init.c
new file mode 100644
index 000000000..53b227a90
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/init.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Joshua Henderson, joshua.henderson@microchip.com
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+#include <linux/platform_data/sdhci-pic32.h>
+
+#include <asm/fw/fw.h>
+#include <asm/mips-boards/generic.h>
+#include <asm/prom.h>
+
+#include "pic32mzda.h"
+
+const char *get_system_type(void)
+{
+	return "PIC32MZDA";
+}
+
+void __init plat_mem_setup(void)
+{
+	void *dtb;
+
+	dtb = get_fdt();
+	if (!dtb) {
+		pr_err("pic32: no DTB found.\n");
+		return;
+	}
+
+	/*
+	 * Load the builtin device tree. This causes the chosen node to be
+	 * parsed resulting in our memory appearing.
+	 */
+	__dt_setup_arch(dtb);
+
+	pr_info("Found following command lines\n");
+	pr_info(" boot_command_line: %s\n", boot_command_line);
+	pr_info(" arcs_cmdline     : %s\n", arcs_cmdline);
+#ifdef CONFIG_CMDLINE_BOOL
+	pr_info(" builtin_cmdline  : %s\n", CONFIG_CMDLINE);
+#endif
+	if (dtb != __dtb_start)
+		strscpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+
+#ifdef CONFIG_EARLY_PRINTK
+	fw_init_early_console();
+#endif
+	pic32_config_init();
+}
+
+static __init void pic32_init_cmdline(int argc, char *argv[])
+{
+	unsigned int count = COMMAND_LINE_SIZE - 1;
+	int i;
+	char *dst = &(arcs_cmdline[0]);
+	char *src;
+
+	for (i = 1; i < argc && count; ++i) {
+		src = argv[i];
+		while (*src && count) {
+			*dst++ = *src++;
+			--count;
+		}
+		*dst++ = ' ';
+	}
+	if (i > 1)
+		--dst;
+
+	*dst = 0;
+}
+
+void __init prom_init(void)
+{
+	pic32_init_cmdline((int)fw_arg0, (char **)fw_arg1);
+}
+
+static struct pic32_sdhci_platform_data sdhci_data = {
+	.setup_dma = pic32_set_sdhci_adma_fifo_threshold,
+};
+
+static struct of_dev_auxdata pic32_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("microchip,pic32mzda-sdhci", 0, "sdhci", &sdhci_data),
+	{ /* sentinel */}
+};
+
+static int __init pic32_of_prepare_platform_data(struct of_dev_auxdata *lookup)
+{
+	struct device_node *root, *np;
+	struct resource res;
+
+	root = of_find_node_by_path("/");
+
+	for (; lookup->compatible; lookup++) {
+		np = of_find_compatible_node(NULL, NULL, lookup->compatible);
+		if (np) {
+			lookup->name = (char *)np->name;
+			if (lookup->phys_addr) {
+				of_node_put(np);
+				continue;
+			}
+			if (!of_address_to_resource(np, 0, &res))
+				lookup->phys_addr = res.start;
+			of_node_put(np);
+		}
+	}
+
+	of_node_put(root);
+
+	return 0;
+}
+
+static int __init plat_of_setup(void)
+{
+	if (!of_have_populated_dt())
+		panic("Device tree not present");
+
+	pic32_of_prepare_platform_data(pic32_auxdata_lookup);
+	if (of_platform_default_populate(NULL, pic32_auxdata_lookup, NULL))
+		panic("Failed to populate DT");
+
+	return 0;
+}
+arch_initcall(plat_of_setup);
diff --git a/arch/mips/pic32/pic32mzda/pic32mzda.h b/arch/mips/pic32/pic32mzda/pic32mzda.h
new file mode 100644
index 000000000..b7a93d8fe
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/pic32mzda.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#ifndef PIC32MZDA_COMMON_H
+#define PIC32MZDA_COMMON_H
+
+/* early clock */
+u32 pic32_get_pbclk(int bus);
+u32 pic32_get_sysclk(void);
+
+/* Device configuration */
+void __init pic32_config_init(void);
+int pic32_set_lcd_mode(int mode);
+int pic32_set_sdhci_adma_fifo_threshold(u32 rthrs, u32 wthrs);
+u32 pic32_get_boot_status(void);
+int pic32_disable_lcd(void);
+int pic32_enable_lcd(void);
+
+#endif
diff --git a/arch/mips/pic32/pic32mzda/time.c b/arch/mips/pic32/pic32mzda/time.c
new file mode 100644
index 000000000..777b515c5
--- /dev/null
+++ b/arch/mips/pic32/pic32mzda/time.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_clk.h>
+#include <linux/of_irq.h>
+
+#include <asm/time.h>
+
+#include "pic32mzda.h"
+
+static const struct of_device_id pic32_infra_match[] = {
+	{ .compatible = "microchip,pic32mzda-infra", },
+	{ },
+};
+
+#define DEFAULT_CORE_TIMER_INTERRUPT 0
+
+static unsigned int pic32_xlate_core_timer_irq(void)
+{
+	struct device_node *node;
+	unsigned int irq;
+
+	node = of_find_matching_node(NULL, pic32_infra_match);
+
+	if (WARN_ON(!node))
+		goto default_map;
+
+	irq = irq_of_parse_and_map(node, 0);
+
+	of_node_put(node);
+
+	if (!irq)
+		goto default_map;
+
+	return irq;
+
+default_map:
+
+	return irq_create_mapping(NULL, DEFAULT_CORE_TIMER_INTERRUPT);
+}
+
+unsigned int get_c0_compare_int(void)
+{
+	return pic32_xlate_core_timer_irq();
+}
+
+void __init plat_time_init(void)
+{
+	unsigned long rate = pic32_get_pbclk(7);
+
+	of_clk_init(NULL);
+
+	pr_info("CPU Clock: %ldMHz\n", rate / 1000000);
+	mips_hpt_frequency = rate / 2;
+
+	timer_probe();
+}