From be961fa15bcb01c5a50c184e3dcc3ab0379edddb Mon Sep 17 00:00:00 2001 From: Purna Chandra Mandal Date: Thu, 28 Jan 2016 15:30:16 +0530 Subject: [PATCH] MIPS: Add support for Microchip PIC32MZ[DA] SoC family. Add Microchip PIC32MZ[DA] SoC family support. Signed-off-by: Purna Chandra Mandal Reviewed-by: Daniel Schwierzeck --- arch/mips/dts/pic32mzda.dtsi | 153 ++++++++++++++++++++++ arch/mips/mach-pic32/Kconfig | 17 ++- arch/mips/mach-pic32/Makefile | 2 +- arch/mips/mach-pic32/cpu.c | 143 ++++++++++++++++++++ arch/mips/mach-pic32/include/mach/pic32.h | 3 + arch/mips/mach-pic32/lowlevel_init.S | 27 ++++ arch/mips/mach-pic32/reset.c | 36 +++++ 7 files changed, 379 insertions(+), 2 deletions(-) create mode 100644 arch/mips/dts/pic32mzda.dtsi create mode 100644 arch/mips/mach-pic32/lowlevel_init.S create mode 100644 arch/mips/mach-pic32/reset.c diff --git a/arch/mips/dts/pic32mzda.dtsi b/arch/mips/dts/pic32mzda.dtsi new file mode 100644 index 0000000000..c67cfa9d0d --- /dev/null +++ b/arch/mips/dts/pic32mzda.dtsi @@ -0,0 +1,153 @@ +/* + * Copyright 2015 Microchip Technology, Inc. + * Purna Chandra Mandal, + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include "skeleton.dtsi" + +/ { + compatible = "microchip,pic32mzda", "microchip,pic32mz"; + + aliases { + gpio0 = &gpioA; + gpio1 = &gpioB; + gpio2 = &gpioC; + gpio3 = &gpioD; + gpio4 = &gpioE; + gpio5 = &gpioF; + gpio6 = &gpioG; + gpio7 = &gpioH; + gpio8 = &gpioJ; + gpio9 = &gpioK; + }; + + cpus { + cpu@0 { + compatible = "mips,mips14kc"; + }; + }; + + clock: clk@1f801200 { + compatible = "microchip,pic32mzda-clk"; + reg = <0x1f801200 0x1000>; + #clock-cells = <1>; + }; + + uart1: serial@1f822000 { + compatible = "microchip,pic32mzda-uart"; + reg = <0x1f822000 0x50>; + interrupts = <112 IRQ_TYPE_LEVEL_HIGH>; + status = "disabled"; + clocks = <&clock PB2CLK>; + }; + + uart2: serial@1f822200 { + compatible = "microchip,pic32mzda-uart"; + reg = <0x1f822200 0x50>; + interrupts = <145 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clock PB2CLK>; + status = "disabled"; + }; + + uart6: serial@1f822a00 { + compatible = "microchip,pic32mzda-uart"; + reg = <0x1f822a00 0x50>; + interrupts = <188 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clock PB2CLK>; + status = "disabled"; + }; + + evic: interrupt-controller@1f810000 { + compatible = "microchip,pic32mzda-evic"; + interrupt-controller; + #interrupt-cells = <2>; + reg = <0x1f810000 0x1000>; + }; + + pinctrl: pinctrl@1f801400 { + compatible = "microchip,pic32mzda-pinctrl"; + reg = <0x1f801400 0x100>, /* in */ + <0x1f801500 0x200>, /* out */ + <0x1f860000 0xa00>; /* port */ + reg-names = "ppsin","ppsout","port"; + status = "disabled"; + + ranges = <0 0x1f860000 0xa00>; + #address-cells = <1>; + #size-cells = <1>; + gpioA: gpio0@0 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x000 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioB: gpio1@100 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x100 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioC: gpio2@200 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x200 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioD: gpio3@300 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x300 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioE: gpio4@400 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x400 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioF: gpio5@500 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x500 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioG: gpio6@600 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x600 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioH: gpio7@700 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x700 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioJ: gpio8@800 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x800 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + + gpioK: gpio9@900 { + compatible = "microchip,pic32mzda-gpio"; + reg = <0x900 0x48>; + gpio-controller; + #gpio-cells = <2>; + }; + }; +}; diff --git a/arch/mips/mach-pic32/Kconfig b/arch/mips/mach-pic32/Kconfig index c1cc5e36fb..f636266adb 100644 --- a/arch/mips/mach-pic32/Kconfig +++ b/arch/mips/mach-pic32/Kconfig @@ -2,6 +2,21 @@ menu "Microchip PIC32 platforms" depends on MACH_PIC32 config SYS_SOC - default "none" + default "pic32mzda" if SOC_PIC32MZDA + +choice + prompt "PIC32 SoC select" + +config SOC_PIC32MZDA + bool "Microchip PIC32MZ[DA] family" + select SUPPORTS_LITTLE_ENDIAN + select SUPPORTS_CPU_MIPS32_R1 + select SUPPORTS_CPU_MIPS32_R2 + select MIPS_L1_CACHE_SHIFT_4 + select SYS_MIPS_CACHE_INIT_RAM_LOAD + help + This supports Microchip PIC32MZ[DA] family of microcontrollers. + +endchoice endmenu diff --git a/arch/mips/mach-pic32/Makefile b/arch/mips/mach-pic32/Makefile index cb426072a5..e321e65fd4 100644 --- a/arch/mips/mach-pic32/Makefile +++ b/arch/mips/mach-pic32/Makefile @@ -4,4 +4,4 @@ # SPDX-License-Identifier: GPL-2.0+ # -obj-y = cpu.o +obj-y = cpu.o lowlevel_init.o reset.o \ No newline at end of file diff --git a/arch/mips/mach-pic32/cpu.c b/arch/mips/mach-pic32/cpu.c index 58fd3abcc2..f2ee911df4 100644 --- a/arch/mips/mach-pic32/cpu.c +++ b/arch/mips/mach-pic32/cpu.c @@ -6,8 +6,151 @@ * */ #include +#include +#include +#include +#include +#include +/* Flash prefetch */ +#define PRECON 0x00 + +/* Flash ECCCON */ +#define ECC_MASK 0x03 +#define ECC_SHIFT 4 + +#define CLK_MHZ(x) ((x) / 1000000) + +DECLARE_GLOBAL_DATA_PTR; + +static ulong clk_get_cpu_rate(void) +{ + int ret; + struct udevice *dev; + + ret = uclass_get_device(UCLASS_CLK, 0, &dev); + if (ret) { + panic("uclass-clk: device not found\n"); + return 0; + } + + return clk_get_rate(dev); +} + +/* initialize prefetch module related to cpu_clk */ +static void prefetch_init(void) +{ + struct pic32_reg_atomic *regs; + const void __iomem *base; + int v, nr_waits; + ulong rate; + + /* cpu frequency in MHZ */ + rate = clk_get_cpu_rate() / 1000000; + + /* get flash ECC type */ + base = pic32_get_syscfg_base(); + v = (readl(base + CFGCON) >> ECC_SHIFT) & ECC_MASK; + + if (v < 2) { + if (rate < 66) + nr_waits = 0; + else if (rate < 133) + nr_waits = 1; + else + nr_waits = 2; + } else { + if (rate <= 83) + nr_waits = 0; + else if (rate <= 166) + nr_waits = 1; + else + nr_waits = 2; + } + + regs = ioremap(PREFETCH_BASE + PRECON, sizeof(*regs)); + writel(nr_waits, ®s->raw); + + /* Enable prefetch for all */ + writel(0x30, ®s->set); + iounmap(regs); +} + +/* arch specific CPU init after DM */ +int arch_cpu_init_dm(void) +{ + /* flash prefetch */ + prefetch_init(); + return 0; +} + +/* Un-gate DDR2 modules (gated by default) */ +static void ddr2_pmd_ungate(void) +{ + void __iomem *regs; + + regs = pic32_get_syscfg_base(); + writel(0, regs + PMD7); +} + +/* initialize the DDR2 Controller and DDR2 PHY */ phys_size_t initdram(int board_type) { + ddr2_pmd_ungate(); + ddr2_phy_init(); + ddr2_ctrl_init(); + return ddr2_calculate_size(); +} + +int misc_init_r(void) +{ + set_io_port_base(0); + return 0; +} + +#ifdef CONFIG_DISPLAY_BOARDINFO +const char *get_core_name(void) +{ + u32 proc_id; + const char *str; + + proc_id = read_c0_prid(); + switch (proc_id) { + case 0x19e28: + str = "PIC32MZ[DA]"; + break; + default: + str = "UNKNOWN"; + } + + return str; +} +#endif +#ifdef CONFIG_CMD_CLK +int soc_clk_dump(void) +{ + int i, ret; + struct udevice *dev; + + ret = uclass_get_device(UCLASS_CLK, 0, &dev); + if (ret) { + printf("clk-uclass not found\n"); + return ret; + } + + printf("PLL Speed: %lu MHz\n", + CLK_MHZ(clk_get_periph_rate(dev, PLLCLK))); + printf("CPU Speed: %lu MHz\n", CLK_MHZ(clk_get_rate(dev))); + printf("MPLL Speed: %lu MHz\n", + CLK_MHZ(clk_get_periph_rate(dev, MPLL))); + + for (i = PB1CLK; i <= PB7CLK; i++) + printf("PB%d Clock Speed: %lu MHz\n", i - PB1CLK + 1, + CLK_MHZ(clk_get_periph_rate(dev, i))); + + for (i = REF1CLK; i <= REF5CLK; i++) + printf("REFO%d Clock Speed: %lu MHz\n", i - REF1CLK + 1, + CLK_MHZ(clk_get_periph_rate(dev, i))); return 0; } +#endif diff --git a/arch/mips/mach-pic32/include/mach/pic32.h b/arch/mips/mach-pic32/include/mach/pic32.h index 7e41810242..16bfacf818 100644 --- a/arch/mips/mach-pic32/include/mach/pic32.h +++ b/arch/mips/mach-pic32/include/mach/pic32.h @@ -73,4 +73,7 @@ static inline void __iomem *pic32_get_syscfg_base(void) return (void __iomem *)CKSEG1ADDR(PIC32_CFG_BASE); } +/* Core */ +const char *get_core_name(void); + #endif /* __PIC32_REGS_H__ */ diff --git a/arch/mips/mach-pic32/lowlevel_init.S b/arch/mips/mach-pic32/lowlevel_init.S new file mode 100644 index 0000000000..e37bebb539 --- /dev/null +++ b/arch/mips/mach-pic32/lowlevel_init.S @@ -0,0 +1,27 @@ +/* + * (c) 2015 Purna Chandra Mandal + * + * SPDX-License-Identifier: GPL-2.0+ + * +*/ + +#include +#include +#include +#include + +LEAF(lowlevel_init) + /* + * Establish Cause + * (set IV bit) + */ + li t1, 0x00800000 + mtc0 t1, CP0_CAUSE + + /* Establish Wired (and Random) */ + mtc0 zero, CP0_WIRED + nop + + jr ra + nop + END(lowlevel_init) diff --git a/arch/mips/mach-pic32/reset.c b/arch/mips/mach-pic32/reset.c new file mode 100644 index 0000000000..66c6833746 --- /dev/null +++ b/arch/mips/mach-pic32/reset.c @@ -0,0 +1,36 @@ +/* + * (c) 2015 Purna Chandra Mandal + * + * SPDX-License-Identifier: GPL-2.0+ + * + */ + +#include +#include +#include + +/* SYSKEY */ +#define UNLOCK_KEY1 0xaa996655 +#define UNLOCK_KEY2 0x556699aa +#define LOCK_KEY 0 + +#define RSWRST 0x1250 + +void _machine_restart(void) +{ + void __iomem *base; + + base = pic32_get_syscfg_base(); + + /* unlock sequence */ + writel(LOCK_KEY, base + SYSKEY); + writel(UNLOCK_KEY1, base + SYSKEY); + writel(UNLOCK_KEY2, base + SYSKEY); + + /* soft reset */ + writel(0x1, base + RSWRST); + (void) readl(base + RSWRST); + + while (1) + ; +} -- 2.30.2