diff options
Diffstat (limited to 'kernel/arch/mips/lantiq')
23 files changed, 3092 insertions, 0 deletions
diff --git a/kernel/arch/mips/lantiq/Kconfig b/kernel/arch/mips/lantiq/Kconfig new file mode 100644 index 000000000..e10d33342 --- /dev/null +++ b/kernel/arch/mips/lantiq/Kconfig @@ -0,0 +1,44 @@ +if LANTIQ + +config SOC_TYPE_XWAY + bool + select PINCTRL_XWAY + default n + +choice + prompt "SoC Type" + default SOC_XWAY + +config SOC_AMAZON_SE + bool "Amazon SE" + select SOC_TYPE_XWAY + +config SOC_XWAY + bool "XWAY" + select SOC_TYPE_XWAY + select HW_HAS_PCI + +config SOC_FALCON + bool "FALCON" + select PINCTRL_FALCON + +endchoice + +choice + prompt "Devicetree" + +config DT_EASY50712 + bool "Easy50712" + depends on SOC_XWAY + select BUILTIN_DTB +endchoice + +config PCI_LANTIQ + bool "PCI Support" + depends on SOC_XWAY && PCI + +config XRX200_PHY_FW + bool "XRX200 PHY firmware loader" + depends on SOC_XWAY + +endif diff --git a/kernel/arch/mips/lantiq/Makefile b/kernel/arch/mips/lantiq/Makefile new file mode 100644 index 000000000..690257ab8 --- /dev/null +++ b/kernel/arch/mips/lantiq/Makefile @@ -0,0 +1,12 @@ +# Copyright (C) 2010 John Crispin <blogic@openwrt.org> +# +# 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. + +obj-y := irq.o clk.o prom.o + +obj-$(CONFIG_EARLY_PRINTK) += early_printk.o + +obj-$(CONFIG_SOC_TYPE_XWAY) += xway/ +obj-$(CONFIG_SOC_FALCON) += falcon/ diff --git a/kernel/arch/mips/lantiq/Platform b/kernel/arch/mips/lantiq/Platform new file mode 100644 index 000000000..b3ec49838 --- /dev/null +++ b/kernel/arch/mips/lantiq/Platform @@ -0,0 +1,9 @@ +# +# Lantiq +# + +platform-$(CONFIG_LANTIQ) += lantiq/ +cflags-$(CONFIG_LANTIQ) += -I$(srctree)/arch/mips/include/asm/mach-lantiq +load-$(CONFIG_LANTIQ) = 0xffffffff80002000 +cflags-$(CONFIG_SOC_TYPE_XWAY) += -I$(srctree)/arch/mips/include/asm/mach-lantiq/xway +cflags-$(CONFIG_SOC_FALCON) += -I$(srctree)/arch/mips/include/asm/mach-lantiq/falcon diff --git a/kernel/arch/mips/lantiq/clk.c b/kernel/arch/mips/lantiq/clk.c new file mode 100644 index 000000000..3fc2e6d70 --- /dev/null +++ b/kernel/arch/mips/lantiq/clk.c @@ -0,0 +1,178 @@ +/* + * 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) 2010 Thomas Langer <thomas.langer@lantiq.com> + * Copyright (C) 2010 John Crispin <blogic@openwrt.org> + */ +#include <linux/io.h> +#include <linux/export.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/err.h> +#include <linux/list.h> + +#include <asm/time.h> +#include <asm/irq.h> +#include <asm/div64.h> + +#include <lantiq_soc.h> + +#include "clk.h" +#include "prom.h" + +/* lantiq socs have 3 static clocks */ +static struct clk cpu_clk_generic[4]; + +void clkdev_add_static(unsigned long cpu, unsigned long fpi, + unsigned long io, unsigned long ppe) +{ + cpu_clk_generic[0].rate = cpu; + cpu_clk_generic[1].rate = fpi; + cpu_clk_generic[2].rate = io; + cpu_clk_generic[3].rate = ppe; +} + +struct clk *clk_get_cpu(void) +{ + return &cpu_clk_generic[0]; +} + +struct clk *clk_get_fpi(void) +{ + return &cpu_clk_generic[1]; +} +EXPORT_SYMBOL_GPL(clk_get_fpi); + +struct clk *clk_get_io(void) +{ + return &cpu_clk_generic[2]; +} + +struct clk *clk_get_ppe(void) +{ + return &cpu_clk_generic[3]; +} +EXPORT_SYMBOL_GPL(clk_get_ppe); + +static inline int clk_good(struct clk *clk) +{ + return clk && !IS_ERR(clk); +} + +unsigned long clk_get_rate(struct clk *clk) +{ + if (unlikely(!clk_good(clk))) + return 0; + + if (clk->rate != 0) + return clk->rate; + + if (clk->get_rate != NULL) + return clk->get_rate(); + + return 0; +} +EXPORT_SYMBOL(clk_get_rate); + +int clk_set_rate(struct clk *clk, unsigned long rate) +{ + if (unlikely(!clk_good(clk))) + return 0; + if (clk->rates && *clk->rates) { + unsigned long *r = clk->rates; + + while (*r && (*r != rate)) + r++; + if (!*r) { + pr_err("clk %s.%s: trying to set invalid rate %ld\n", + clk->cl.dev_id, clk->cl.con_id, rate); + return -1; + } + } + clk->rate = rate; + return 0; +} +EXPORT_SYMBOL(clk_set_rate); + +int clk_enable(struct clk *clk) +{ + if (unlikely(!clk_good(clk))) + return -1; + + if (clk->enable) + return clk->enable(clk); + + return -1; +} +EXPORT_SYMBOL(clk_enable); + +void clk_disable(struct clk *clk) +{ + if (unlikely(!clk_good(clk))) + return; + + if (clk->disable) + clk->disable(clk); +} +EXPORT_SYMBOL(clk_disable); + +int clk_activate(struct clk *clk) +{ + if (unlikely(!clk_good(clk))) + return -1; + + if (clk->activate) + return clk->activate(clk); + + return -1; +} +EXPORT_SYMBOL(clk_activate); + +void clk_deactivate(struct clk *clk) +{ + if (unlikely(!clk_good(clk))) + return; + + if (clk->deactivate) + clk->deactivate(clk); +} +EXPORT_SYMBOL(clk_deactivate); + +struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec) +{ + return NULL; +} + +static inline u32 get_counter_resolution(void) +{ + u32 res; + + __asm__ __volatile__( + ".set push\n" + ".set mips32r2\n" + "rdhwr %0, $3\n" + ".set pop\n" + : "=&r" (res) + : /* no input */ + : "memory"); + + return res; +} + +void __init plat_time_init(void) +{ + struct clk *clk; + + ltq_soc_init(); + + clk = clk_get_cpu(); + mips_hpt_frequency = clk_get_rate(clk) / get_counter_resolution(); + write_c0_compare(read_c0_count()); + pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000); + clk_put(clk); +} diff --git a/kernel/arch/mips/lantiq/clk.h b/kernel/arch/mips/lantiq/clk.h new file mode 100644 index 000000000..77e4bdb1f --- /dev/null +++ b/kernel/arch/mips/lantiq/clk.h @@ -0,0 +1,83 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + */ + +#ifndef _LTQ_CLK_H__ +#define _LTQ_CLK_H__ + +#include <linux/clkdev.h> + +/* clock speeds */ +#define CLOCK_33M 33333333 +#define CLOCK_60M 60000000 +#define CLOCK_62_5M 62500000 +#define CLOCK_83M 83333333 +#define CLOCK_83_5M 83500000 +#define CLOCK_98_304M 98304000 +#define CLOCK_100M 100000000 +#define CLOCK_111M 111111111 +#define CLOCK_125M 125000000 +#define CLOCK_133M 133333333 +#define CLOCK_150M 150000000 +#define CLOCK_166M 166666666 +#define CLOCK_167M 166666667 +#define CLOCK_196_608M 196608000 +#define CLOCK_200M 200000000 +#define CLOCK_222M 222000000 +#define CLOCK_240M 240000000 +#define CLOCK_250M 250000000 +#define CLOCK_266M 266666666 +#define CLOCK_300M 300000000 +#define CLOCK_333M 333333333 +#define CLOCK_393M 393215332 +#define CLOCK_400M 400000000 +#define CLOCK_450M 450000000 +#define CLOCK_500M 500000000 +#define CLOCK_600M 600000000 + +/* clock out speeds */ +#define CLOCK_32_768K 32768 +#define CLOCK_1_536M 1536000 +#define CLOCK_2_5M 2500000 +#define CLOCK_12M 12000000 +#define CLOCK_24M 24000000 +#define CLOCK_25M 25000000 +#define CLOCK_30M 30000000 +#define CLOCK_40M 40000000 +#define CLOCK_48M 48000000 +#define CLOCK_50M 50000000 +#define CLOCK_60M 60000000 + +struct clk { + struct clk_lookup cl; + unsigned long rate; + unsigned long *rates; + unsigned int module; + unsigned int bits; + unsigned long (*get_rate) (void); + int (*enable) (struct clk *clk); + void (*disable) (struct clk *clk); + int (*activate) (struct clk *clk); + void (*deactivate) (struct clk *clk); + void (*reboot) (struct clk *clk); +}; + +extern void clkdev_add_static(unsigned long cpu, unsigned long fpi, + unsigned long io, unsigned long ppe); + +extern unsigned long ltq_danube_cpu_hz(void); +extern unsigned long ltq_danube_fpi_hz(void); +extern unsigned long ltq_danube_pp32_hz(void); + +extern unsigned long ltq_ar9_cpu_hz(void); +extern unsigned long ltq_ar9_fpi_hz(void); + +extern unsigned long ltq_vr9_cpu_hz(void); +extern unsigned long ltq_vr9_fpi_hz(void); +extern unsigned long ltq_vr9_pp32_hz(void); + +#endif diff --git a/kernel/arch/mips/lantiq/early_printk.c b/kernel/arch/mips/lantiq/early_printk.c new file mode 100644 index 000000000..9b28d0940 --- /dev/null +++ b/kernel/arch/mips/lantiq/early_printk.c @@ -0,0 +1,32 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + */ + +#include <linux/cpu.h> +#include <lantiq_soc.h> + +#define ASC_BUF 1024 +#define LTQ_ASC_FSTAT ((u32 *)(LTQ_EARLY_ASC + 0x0048)) +#ifdef __BIG_ENDIAN +#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020 + 3)) +#else +#define LTQ_ASC_TBUF ((u32 *)(LTQ_EARLY_ASC + 0x0020)) +#endif +#define TXMASK 0x3F00 +#define TXOFFSET 8 + +void prom_putchar(char c) +{ + unsigned long flags; + + local_irq_save(flags); + do { } while ((ltq_r32(LTQ_ASC_FSTAT) & TXMASK) >> TXOFFSET); + if (c == '\n') + ltq_w8('\r', LTQ_ASC_TBUF); + ltq_w8(c, LTQ_ASC_TBUF); + local_irq_restore(flags); +} diff --git a/kernel/arch/mips/lantiq/falcon/Makefile b/kernel/arch/mips/lantiq/falcon/Makefile new file mode 100644 index 000000000..ff220f976 --- /dev/null +++ b/kernel/arch/mips/lantiq/falcon/Makefile @@ -0,0 +1 @@ +obj-y := prom.o reset.o sysctrl.o diff --git a/kernel/arch/mips/lantiq/falcon/prom.c b/kernel/arch/mips/lantiq/falcon/prom.c new file mode 100644 index 000000000..aa9497947 --- /dev/null +++ b/kernel/arch/mips/lantiq/falcon/prom.c @@ -0,0 +1,92 @@ +/* + * 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) 2012 Thomas Langer <thomas.langer@lantiq.com> + * Copyright (C) 2012 John Crispin <blogic@openwrt.org> + */ + +#include <linux/kernel.h> +#include <asm/cacheflush.h> +#include <asm/traps.h> +#include <asm/io.h> + +#include <lantiq_soc.h> + +#include "../prom.h" + +#define SOC_FALCON "Falcon" +#define SOC_FALCON_D "Falcon-D" +#define SOC_FALCON_V "Falcon-V" +#define SOC_FALCON_M "Falcon-M" + +#define COMP_FALCON "lantiq,falcon" + +#define PART_SHIFT 12 +#define PART_MASK 0x0FFFF000 +#define REV_SHIFT 28 +#define REV_MASK 0xF0000000 +#define SREV_SHIFT 22 +#define SREV_MASK 0x03C00000 +#define TYPE_SHIFT 26 +#define TYPE_MASK 0x3C000000 + +/* reset, nmi and ejtag exception vectors */ +#define BOOT_REG_BASE (KSEG1 | 0x1F200000) +#define BOOT_RVEC (BOOT_REG_BASE | 0x00) +#define BOOT_NVEC (BOOT_REG_BASE | 0x04) +#define BOOT_EVEC (BOOT_REG_BASE | 0x08) + +void __init ltq_soc_nmi_setup(void) +{ + extern void (*nmi_handler)(void); + + ltq_w32((unsigned long)&nmi_handler, (void *)BOOT_NVEC); +} + +void __init ltq_soc_ejtag_setup(void) +{ + extern void (*ejtag_debug_handler)(void); + + ltq_w32((unsigned long)&ejtag_debug_handler, (void *)BOOT_EVEC); +} + +void __init ltq_soc_detect(struct ltq_soc_info *i) +{ + u32 type; + i->partnum = (ltq_r32(FALCON_CHIPID) & PART_MASK) >> PART_SHIFT; + i->rev = (ltq_r32(FALCON_CHIPID) & REV_MASK) >> REV_SHIFT; + i->srev = ((ltq_r32(FALCON_CHIPCONF) & SREV_MASK) >> SREV_SHIFT); + i->compatible = COMP_FALCON; + i->type = SOC_TYPE_FALCON; + sprintf(i->rev_type, "%c%d%d", (i->srev & 0x4) ? ('B') : ('A'), + i->rev & 0x7, (i->srev & 0x3) + 1); + + switch (i->partnum) { + case SOC_ID_FALCON: + type = (ltq_r32(FALCON_CHIPTYPE) & TYPE_MASK) >> TYPE_SHIFT; + switch (type) { + case 0: + i->name = SOC_FALCON_D; + break; + case 1: + i->name = SOC_FALCON_V; + break; + case 2: + i->name = SOC_FALCON_M; + break; + default: + i->name = SOC_FALCON; + break; + } + break; + + default: + unreachable(); + break; + } + + board_nmi_handler_setup = ltq_soc_nmi_setup; + board_ejtag_handler_setup = ltq_soc_ejtag_setup; +} diff --git a/kernel/arch/mips/lantiq/falcon/reset.c b/kernel/arch/mips/lantiq/falcon/reset.c new file mode 100644 index 000000000..568248253 --- /dev/null +++ b/kernel/arch/mips/lantiq/falcon/reset.c @@ -0,0 +1,90 @@ +/* + * 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) 2012 Thomas Langer <thomas.langer@lantiq.com> + * Copyright (C) 2012 John Crispin <blogic@openwrt.org> + */ + +#include <linux/init.h> +#include <linux/io.h> +#include <linux/pm.h> +#include <asm/reboot.h> +#include <linux/export.h> + +#include <lantiq_soc.h> + +/* CPU0 Reset Source Register */ +#define SYS1_CPU0RS 0x0040 +/* reset cause mask */ +#define CPU0RS_MASK 0x0003 +/* CPU0 Boot Mode Register */ +#define SYS1_BM 0x00a0 +/* boot mode mask */ +#define BM_MASK 0x0005 + +/* allow platform code to find out what surce we booted from */ +unsigned char ltq_boot_select(void) +{ + return ltq_sys1_r32(SYS1_BM) & BM_MASK; +} + +/* allow the watchdog driver to find out what the boot reason was */ +int ltq_reset_cause(void) +{ + return ltq_sys1_r32(SYS1_CPU0RS) & CPU0RS_MASK; +} +EXPORT_SYMBOL_GPL(ltq_reset_cause); + +#define BOOT_REG_BASE (KSEG1 | 0x1F200000) +#define BOOT_PW1_REG (BOOT_REG_BASE | 0x20) +#define BOOT_PW2_REG (BOOT_REG_BASE | 0x24) +#define BOOT_PW1 0x4C545100 +#define BOOT_PW2 0x0051544C + +#define WDT_REG_BASE (KSEG1 | 0x1F8803F0) +#define WDT_PW1 0x00BE0000 +#define WDT_PW2 0x00DC0000 + +static void machine_restart(char *command) +{ + local_irq_disable(); + + /* reboot magic */ + ltq_w32(BOOT_PW1, (void *)BOOT_PW1_REG); /* 'LTQ\0' */ + ltq_w32(BOOT_PW2, (void *)BOOT_PW2_REG); /* '\0QTL' */ + ltq_w32(0, (void *)BOOT_REG_BASE); /* reset Bootreg RVEC */ + + /* watchdog magic */ + ltq_w32(WDT_PW1, (void *)WDT_REG_BASE); + ltq_w32(WDT_PW2 | + (0x3 << 26) | /* PWL */ + (0x2 << 24) | /* CLKDIV */ + (0x1 << 31) | /* enable */ + (1), /* reload */ + (void *)WDT_REG_BASE); + unreachable(); +} + +static void machine_halt(void) +{ + local_irq_disable(); + unreachable(); +} + +static void machine_power_off(void) +{ + local_irq_disable(); + unreachable(); +} + +static int __init mips_reboot_setup(void) +{ + _machine_restart = machine_restart; + _machine_halt = machine_halt; + pm_power_off = machine_power_off; + return 0; +} + +arch_initcall(mips_reboot_setup); diff --git a/kernel/arch/mips/lantiq/falcon/sysctrl.c b/kernel/arch/mips/lantiq/falcon/sysctrl.c new file mode 100644 index 000000000..7edcd4946 --- /dev/null +++ b/kernel/arch/mips/lantiq/falcon/sysctrl.c @@ -0,0 +1,265 @@ +/* + * 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) 2011 Thomas Langer <thomas.langer@lantiq.com> + * Copyright (C) 2011 John Crispin <blogic@openwrt.org> + */ + +#include <linux/ioport.h> +#include <linux/export.h> +#include <linux/clkdev.h> +#include <linux/of_address.h> +#include <asm/delay.h> + +#include <lantiq_soc.h> + +#include "../clk.h" + +/* infrastructure control register */ +#define SYS1_INFRAC 0x00bc +/* Configuration fuses for drivers and pll */ +#define STATUS_CONFIG 0x0040 + +/* GPE frequency selection */ +#define GPPC_OFFSET 24 +#define GPEFREQ_MASK 0x00000C0 +#define GPEFREQ_OFFSET 10 +/* Clock status register */ +#define SYSCTL_CLKS 0x0000 +/* Clock enable register */ +#define SYSCTL_CLKEN 0x0004 +/* Clock clear register */ +#define SYSCTL_CLKCLR 0x0008 +/* Activation Status Register */ +#define SYSCTL_ACTS 0x0020 +/* Activation Register */ +#define SYSCTL_ACT 0x0024 +/* Deactivation Register */ +#define SYSCTL_DEACT 0x0028 +/* reboot Register */ +#define SYSCTL_RBT 0x002c +/* CPU0 Clock Control Register */ +#define SYS1_CPU0CC 0x0040 +/* HRST_OUT_N Control Register */ +#define SYS1_HRSTOUTC 0x00c0 +/* clock divider bit */ +#define CPU0CC_CPUDIV 0x0001 + +/* Activation Status Register */ +#define ACTS_ASC0_ACT 0x00001000 +#define ACTS_SSC0 0x00002000 +#define ACTS_ASC1_ACT 0x00000800 +#define ACTS_I2C_ACT 0x00004000 +#define ACTS_P0 0x00010000 +#define ACTS_P1 0x00010000 +#define ACTS_P2 0x00020000 +#define ACTS_P3 0x00020000 +#define ACTS_P4 0x00040000 +#define ACTS_PADCTRL0 0x00100000 +#define ACTS_PADCTRL1 0x00100000 +#define ACTS_PADCTRL2 0x00200000 +#define ACTS_PADCTRL3 0x00200000 +#define ACTS_PADCTRL4 0x00400000 + +#define sysctl_w32(m, x, y) ltq_w32((x), sysctl_membase[m] + (y)) +#define sysctl_r32(m, x) ltq_r32(sysctl_membase[m] + (x)) +#define sysctl_w32_mask(m, clear, set, reg) \ + sysctl_w32(m, (sysctl_r32(m, reg) & ~(clear)) | (set), reg) + +#define status_w32(x, y) ltq_w32((x), status_membase + (y)) +#define status_r32(x) ltq_r32(status_membase + (x)) + +static void __iomem *sysctl_membase[3], *status_membase; +void __iomem *ltq_sys1_membase, *ltq_ebu_membase; + +void falcon_trigger_hrst(int level) +{ + sysctl_w32(SYSCTL_SYS1, level & 1, SYS1_HRSTOUTC); +} + +static inline void sysctl_wait(struct clk *clk, + unsigned int test, unsigned int reg) +{ + int err = 1000000; + + do {} while (--err && ((sysctl_r32(clk->module, reg) + & clk->bits) != test)); + if (!err) + pr_err("module de/activation failed %d %08X %08X %08X\n", + clk->module, clk->bits, test, + sysctl_r32(clk->module, reg) & clk->bits); +} + +static int sysctl_activate(struct clk *clk) +{ + sysctl_w32(clk->module, clk->bits, SYSCTL_CLKEN); + sysctl_w32(clk->module, clk->bits, SYSCTL_ACT); + sysctl_wait(clk, clk->bits, SYSCTL_ACTS); + return 0; +} + +static void sysctl_deactivate(struct clk *clk) +{ + sysctl_w32(clk->module, clk->bits, SYSCTL_CLKCLR); + sysctl_w32(clk->module, clk->bits, SYSCTL_DEACT); + sysctl_wait(clk, 0, SYSCTL_ACTS); +} + +static int sysctl_clken(struct clk *clk) +{ + sysctl_w32(clk->module, clk->bits, SYSCTL_CLKEN); + sysctl_w32(clk->module, clk->bits, SYSCTL_ACT); + sysctl_wait(clk, clk->bits, SYSCTL_CLKS); + return 0; +} + +static void sysctl_clkdis(struct clk *clk) +{ + sysctl_w32(clk->module, clk->bits, SYSCTL_CLKCLR); + sysctl_wait(clk, 0, SYSCTL_CLKS); +} + +static void sysctl_reboot(struct clk *clk) +{ + unsigned int act; + unsigned int bits; + + act = sysctl_r32(clk->module, SYSCTL_ACT); + bits = ~act & clk->bits; + if (bits != 0) { + sysctl_w32(clk->module, bits, SYSCTL_CLKEN); + sysctl_w32(clk->module, bits, SYSCTL_ACT); + sysctl_wait(clk, bits, SYSCTL_ACTS); + } + sysctl_w32(clk->module, act & clk->bits, SYSCTL_RBT); + sysctl_wait(clk, clk->bits, SYSCTL_ACTS); +} + +/* enable the ONU core */ +static void falcon_gpe_enable(void) +{ + unsigned int freq; + unsigned int status; + + /* if if the clock is already enabled */ + status = sysctl_r32(SYSCTL_SYS1, SYS1_INFRAC); + if (status & (1 << (GPPC_OFFSET + 1))) + return; + + freq = (status_r32(STATUS_CONFIG) & + GPEFREQ_MASK) >> + GPEFREQ_OFFSET; + if (freq == 0) + freq = 1; /* use 625MHz on unfused chip */ + + /* apply new frequency */ + sysctl_w32_mask(SYSCTL_SYS1, 7 << (GPPC_OFFSET + 1), + freq << (GPPC_OFFSET + 2) , SYS1_INFRAC); + udelay(1); + + /* enable new frequency */ + sysctl_w32_mask(SYSCTL_SYS1, 0, 1 << (GPPC_OFFSET + 1), SYS1_INFRAC); + udelay(1); +} + +static inline void clkdev_add_sys(const char *dev, unsigned int module, + unsigned int bits) +{ + struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + + clk->cl.dev_id = dev; + clk->cl.con_id = NULL; + clk->cl.clk = clk; + clk->module = module; + clk->bits = bits; + clk->activate = sysctl_activate; + clk->deactivate = sysctl_deactivate; + clk->enable = sysctl_clken; + clk->disable = sysctl_clkdis; + clk->reboot = sysctl_reboot; + clkdev_add(&clk->cl); +} + +void __init ltq_soc_init(void) +{ + struct device_node *np_status = + of_find_compatible_node(NULL, NULL, "lantiq,status-falcon"); + struct device_node *np_ebu = + of_find_compatible_node(NULL, NULL, "lantiq,ebu-falcon"); + struct device_node *np_sys1 = + of_find_compatible_node(NULL, NULL, "lantiq,sys1-falcon"); + struct device_node *np_syseth = + of_find_compatible_node(NULL, NULL, "lantiq,syseth-falcon"); + struct device_node *np_sysgpe = + of_find_compatible_node(NULL, NULL, "lantiq,sysgpe-falcon"); + struct resource res_status, res_ebu, res_sys[3]; + int i; + + /* check if all the core register ranges are available */ + if (!np_status || !np_ebu || !np_sys1 || !np_syseth || !np_sysgpe) + panic("Failed to load core nodes from devicetree"); + + if (of_address_to_resource(np_status, 0, &res_status) || + of_address_to_resource(np_ebu, 0, &res_ebu) || + of_address_to_resource(np_sys1, 0, &res_sys[0]) || + of_address_to_resource(np_syseth, 0, &res_sys[1]) || + of_address_to_resource(np_sysgpe, 0, &res_sys[2])) + panic("Failed to get core resources"); + + if ((request_mem_region(res_status.start, resource_size(&res_status), + res_status.name) < 0) || + (request_mem_region(res_ebu.start, resource_size(&res_ebu), + res_ebu.name) < 0) || + (request_mem_region(res_sys[0].start, + resource_size(&res_sys[0]), + res_sys[0].name) < 0) || + (request_mem_region(res_sys[1].start, + resource_size(&res_sys[1]), + res_sys[1].name) < 0) || + (request_mem_region(res_sys[2].start, + resource_size(&res_sys[2]), + res_sys[2].name) < 0)) + pr_err("Failed to request core resources"); + + status_membase = ioremap_nocache(res_status.start, + resource_size(&res_status)); + ltq_ebu_membase = ioremap_nocache(res_ebu.start, + resource_size(&res_ebu)); + + if (!status_membase || !ltq_ebu_membase) + panic("Failed to remap core resources"); + + for (i = 0; i < 3; i++) { + sysctl_membase[i] = ioremap_nocache(res_sys[i].start, + resource_size(&res_sys[i])); + if (!sysctl_membase[i]) + panic("Failed to remap sysctrl resources"); + } + ltq_sys1_membase = sysctl_membase[0]; + + falcon_gpe_enable(); + + /* get our 3 static rates for cpu, fpi and io clocks */ + if (ltq_sys1_r32(SYS1_CPU0CC) & CPU0CC_CPUDIV) + clkdev_add_static(CLOCK_200M, CLOCK_100M, CLOCK_200M, 0); + else + clkdev_add_static(CLOCK_400M, CLOCK_100M, CLOCK_200M, 0); + + /* add our clock domains */ + clkdev_add_sys("1d810000.gpio", SYSCTL_SYSETH, ACTS_P0); + clkdev_add_sys("1d810100.gpio", SYSCTL_SYSETH, ACTS_P2); + clkdev_add_sys("1e800100.gpio", SYSCTL_SYS1, ACTS_P1); + clkdev_add_sys("1e800200.gpio", SYSCTL_SYS1, ACTS_P3); + clkdev_add_sys("1e800300.gpio", SYSCTL_SYS1, ACTS_P4); + clkdev_add_sys("1db01000.pad", SYSCTL_SYSETH, ACTS_PADCTRL0); + clkdev_add_sys("1db02000.pad", SYSCTL_SYSETH, ACTS_PADCTRL2); + clkdev_add_sys("1e800400.pad", SYSCTL_SYS1, ACTS_PADCTRL1); + clkdev_add_sys("1e800500.pad", SYSCTL_SYS1, ACTS_PADCTRL3); + clkdev_add_sys("1e800600.pad", SYSCTL_SYS1, ACTS_PADCTRL4); + clkdev_add_sys("1e100b00.serial", SYSCTL_SYS1, ACTS_ASC1_ACT); + clkdev_add_sys("1e100c00.serial", SYSCTL_SYS1, ACTS_ASC0_ACT); + clkdev_add_sys("1e100d00.spi", SYSCTL_SYS1, ACTS_SSC0); + clkdev_add_sys("1e200000.i2c", SYSCTL_SYS1, ACTS_I2C_ACT); +} diff --git a/kernel/arch/mips/lantiq/irq.c b/kernel/arch/mips/lantiq/irq.c new file mode 100644 index 000000000..6ab105734 --- /dev/null +++ b/kernel/arch/mips/lantiq/irq.c @@ -0,0 +1,483 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + * Copyright (C) 2010 Thomas Langer <thomas.langer@lantiq.com> + */ + +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/sched.h> +#include <linux/irqdomain.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> + +#include <asm/bootinfo.h> +#include <asm/irq_cpu.h> + +#include <lantiq_soc.h> +#include <irq.h> + +/* register definitions - internal irqs */ +#define LTQ_ICU_IM0_ISR 0x0000 +#define LTQ_ICU_IM0_IER 0x0008 +#define LTQ_ICU_IM0_IOSR 0x0010 +#define LTQ_ICU_IM0_IRSR 0x0018 +#define LTQ_ICU_IM0_IMR 0x0020 +#define LTQ_ICU_IM1_ISR 0x0028 +#define LTQ_ICU_OFFSET (LTQ_ICU_IM1_ISR - LTQ_ICU_IM0_ISR) + +/* register definitions - external irqs */ +#define LTQ_EIU_EXIN_C 0x0000 +#define LTQ_EIU_EXIN_INIC 0x0004 +#define LTQ_EIU_EXIN_INC 0x0008 +#define LTQ_EIU_EXIN_INEN 0x000C + +/* number of external interrupts */ +#define MAX_EIU 6 + +/* the performance counter */ +#define LTQ_PERF_IRQ (INT_NUM_IM4_IRL0 + 31) + +/* + * irqs generated by devices attached to the EBU need to be acked in + * a special manner + */ +#define LTQ_ICU_EBU_IRQ 22 + +#define ltq_icu_w32(m, x, y) ltq_w32((x), ltq_icu_membase[m] + (y)) +#define ltq_icu_r32(m, x) ltq_r32(ltq_icu_membase[m] + (x)) + +#define ltq_eiu_w32(x, y) ltq_w32((x), ltq_eiu_membase + (y)) +#define ltq_eiu_r32(x) ltq_r32(ltq_eiu_membase + (x)) + +/* our 2 ipi interrupts for VSMP */ +#define MIPS_CPU_IPI_RESCHED_IRQ 0 +#define MIPS_CPU_IPI_CALL_IRQ 1 + +/* we have a cascade of 8 irqs */ +#define MIPS_CPU_IRQ_CASCADE 8 + +#ifdef CONFIG_MIPS_MT_SMP +int gic_present; +#endif + +static int exin_avail; +static struct resource ltq_eiu_irq[MAX_EIU]; +static void __iomem *ltq_icu_membase[MAX_IM]; +static void __iomem *ltq_eiu_membase; +static struct irq_domain *ltq_domain; +static int ltq_perfcount_irq; + +int ltq_eiu_get_irq(int exin) +{ + if (exin < exin_avail) + return ltq_eiu_irq[exin].start; + return -1; +} + +void ltq_disable_irq(struct irq_data *d) +{ + u32 ier = LTQ_ICU_IM0_IER; + int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE; + int im = offset / INT_NUM_IM_OFFSET; + + offset %= INT_NUM_IM_OFFSET; + ltq_icu_w32(im, ltq_icu_r32(im, ier) & ~BIT(offset), ier); +} + +void ltq_mask_and_ack_irq(struct irq_data *d) +{ + u32 ier = LTQ_ICU_IM0_IER; + u32 isr = LTQ_ICU_IM0_ISR; + int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE; + int im = offset / INT_NUM_IM_OFFSET; + + offset %= INT_NUM_IM_OFFSET; + ltq_icu_w32(im, ltq_icu_r32(im, ier) & ~BIT(offset), ier); + ltq_icu_w32(im, BIT(offset), isr); +} + +static void ltq_ack_irq(struct irq_data *d) +{ + u32 isr = LTQ_ICU_IM0_ISR; + int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE; + int im = offset / INT_NUM_IM_OFFSET; + + offset %= INT_NUM_IM_OFFSET; + ltq_icu_w32(im, BIT(offset), isr); +} + +void ltq_enable_irq(struct irq_data *d) +{ + u32 ier = LTQ_ICU_IM0_IER; + int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE; + int im = offset / INT_NUM_IM_OFFSET; + + offset %= INT_NUM_IM_OFFSET; + ltq_icu_w32(im, ltq_icu_r32(im, ier) | BIT(offset), ier); +} + +static int ltq_eiu_settype(struct irq_data *d, unsigned int type) +{ + int i; + + for (i = 0; i < MAX_EIU; i++) { + if (d->hwirq == ltq_eiu_irq[i].start) { + int val = 0; + int edge = 0; + + switch (type) { + case IRQF_TRIGGER_NONE: + break; + case IRQF_TRIGGER_RISING: + val = 1; + edge = 1; + break; + case IRQF_TRIGGER_FALLING: + val = 2; + edge = 1; + break; + case IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING: + val = 3; + edge = 1; + break; + case IRQF_TRIGGER_HIGH: + val = 5; + break; + case IRQF_TRIGGER_LOW: + val = 6; + break; + default: + pr_err("invalid type %d for irq %ld\n", + type, d->hwirq); + return -EINVAL; + } + + if (edge) + irq_set_handler(d->hwirq, handle_edge_irq); + + ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_C) | + (val << (i * 4)), LTQ_EIU_EXIN_C); + } + } + + return 0; +} + +static unsigned int ltq_startup_eiu_irq(struct irq_data *d) +{ + int i; + + ltq_enable_irq(d); + for (i = 0; i < MAX_EIU; i++) { + if (d->hwirq == ltq_eiu_irq[i].start) { + /* by default we are low level triggered */ + ltq_eiu_settype(d, IRQF_TRIGGER_LOW); + /* clear all pending */ + ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INC) & ~BIT(i), + LTQ_EIU_EXIN_INC); + /* enable */ + ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INEN) | BIT(i), + LTQ_EIU_EXIN_INEN); + break; + } + } + + return 0; +} + +static void ltq_shutdown_eiu_irq(struct irq_data *d) +{ + int i; + + ltq_disable_irq(d); + for (i = 0; i < MAX_EIU; i++) { + if (d->hwirq == ltq_eiu_irq[i].start) { + /* disable */ + ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INEN) & ~BIT(i), + LTQ_EIU_EXIN_INEN); + break; + } + } +} + +static struct irq_chip ltq_irq_type = { + "icu", + .irq_enable = ltq_enable_irq, + .irq_disable = ltq_disable_irq, + .irq_unmask = ltq_enable_irq, + .irq_ack = ltq_ack_irq, + .irq_mask = ltq_disable_irq, + .irq_mask_ack = ltq_mask_and_ack_irq, +}; + +static struct irq_chip ltq_eiu_type = { + "eiu", + .irq_startup = ltq_startup_eiu_irq, + .irq_shutdown = ltq_shutdown_eiu_irq, + .irq_enable = ltq_enable_irq, + .irq_disable = ltq_disable_irq, + .irq_unmask = ltq_enable_irq, + .irq_ack = ltq_ack_irq, + .irq_mask = ltq_disable_irq, + .irq_mask_ack = ltq_mask_and_ack_irq, + .irq_set_type = ltq_eiu_settype, +}; + +static void ltq_hw_irqdispatch(int module) +{ + u32 irq; + + irq = ltq_icu_r32(module, LTQ_ICU_IM0_IOSR); + if (irq == 0) + return; + + /* + * silicon bug causes only the msb set to 1 to be valid. all + * other bits might be bogus + */ + irq = __fls(irq); + do_IRQ((int)irq + MIPS_CPU_IRQ_CASCADE + (INT_NUM_IM_OFFSET * module)); + + /* if this is a EBU irq, we need to ack it or get a deadlock */ + if ((irq == LTQ_ICU_EBU_IRQ) && (module == 0) && LTQ_EBU_PCC_ISTAT) + ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_ISTAT) | 0x10, + LTQ_EBU_PCC_ISTAT); +} + +#define DEFINE_HWx_IRQDISPATCH(x) \ + static void ltq_hw ## x ## _irqdispatch(void) \ + { \ + ltq_hw_irqdispatch(x); \ + } +DEFINE_HWx_IRQDISPATCH(0) +DEFINE_HWx_IRQDISPATCH(1) +DEFINE_HWx_IRQDISPATCH(2) +DEFINE_HWx_IRQDISPATCH(3) +DEFINE_HWx_IRQDISPATCH(4) + +#if MIPS_CPU_TIMER_IRQ == 7 +static void ltq_hw5_irqdispatch(void) +{ + do_IRQ(MIPS_CPU_TIMER_IRQ); +} +#else +DEFINE_HWx_IRQDISPATCH(5) +#endif + +#ifdef CONFIG_MIPS_MT_SMP +void __init arch_init_ipiirq(int irq, struct irqaction *action) +{ + setup_irq(irq, action); + irq_set_handler(irq, handle_percpu_irq); +} + +static void ltq_sw0_irqdispatch(void) +{ + do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ); +} + +static void ltq_sw1_irqdispatch(void) +{ + do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ); +} +static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id) +{ + scheduler_ipi(); + return IRQ_HANDLED; +} + +static irqreturn_t ipi_call_interrupt(int irq, void *dev_id) +{ + smp_call_function_interrupt(); + return IRQ_HANDLED; +} + +static struct irqaction irq_resched = { + .handler = ipi_resched_interrupt, + .flags = IRQF_PERCPU, + .name = "IPI_resched" +}; + +static struct irqaction irq_call = { + .handler = ipi_call_interrupt, + .flags = IRQF_PERCPU, + .name = "IPI_call" +}; +#endif + +asmlinkage void plat_irq_dispatch(void) +{ + unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM; + unsigned int i; + + if ((MIPS_CPU_TIMER_IRQ == 7) && (pending & CAUSEF_IP7)) { + do_IRQ(MIPS_CPU_TIMER_IRQ); + goto out; + } else { + for (i = 0; i < MAX_IM; i++) { + if (pending & (CAUSEF_IP2 << i)) { + ltq_hw_irqdispatch(i); + goto out; + } + } + } + pr_alert("Spurious IRQ: CAUSE=0x%08x\n", read_c0_status()); + +out: + return; +} + +static int icu_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) +{ + struct irq_chip *chip = <q_irq_type; + int i; + + if (hw < MIPS_CPU_IRQ_CASCADE) + return 0; + + for (i = 0; i < exin_avail; i++) + if (hw == ltq_eiu_irq[i].start) + chip = <q_eiu_type; + + irq_set_chip_and_handler(hw, chip, handle_level_irq); + + return 0; +} + +static const struct irq_domain_ops irq_domain_ops = { + .xlate = irq_domain_xlate_onetwocell, + .map = icu_map, +}; + +static struct irqaction cascade = { + .handler = no_action, + .name = "cascade", +}; + +int __init icu_of_init(struct device_node *node, struct device_node *parent) +{ + struct device_node *eiu_node; + struct resource res; + int i, ret; + + for (i = 0; i < MAX_IM; i++) { + if (of_address_to_resource(node, i, &res)) + panic("Failed to get icu memory range"); + + if (request_mem_region(res.start, resource_size(&res), + res.name) < 0) + pr_err("Failed to request icu memory"); + + ltq_icu_membase[i] = ioremap_nocache(res.start, + resource_size(&res)); + if (!ltq_icu_membase[i]) + panic("Failed to remap icu memory"); + } + + /* turn off all irqs by default */ + for (i = 0; i < MAX_IM; i++) { + /* make sure all irqs are turned off by default */ + ltq_icu_w32(i, 0, LTQ_ICU_IM0_IER); + /* clear all possibly pending interrupts */ + ltq_icu_w32(i, ~0, LTQ_ICU_IM0_ISR); + } + + mips_cpu_irq_init(); + + for (i = 0; i < MAX_IM; i++) + setup_irq(i + 2, &cascade); + + if (cpu_has_vint) { + pr_info("Setting up vectored interrupts\n"); + set_vi_handler(2, ltq_hw0_irqdispatch); + set_vi_handler(3, ltq_hw1_irqdispatch); + set_vi_handler(4, ltq_hw2_irqdispatch); + set_vi_handler(5, ltq_hw3_irqdispatch); + set_vi_handler(6, ltq_hw4_irqdispatch); + set_vi_handler(7, ltq_hw5_irqdispatch); + } + + ltq_domain = irq_domain_add_linear(node, + (MAX_IM * INT_NUM_IM_OFFSET) + MIPS_CPU_IRQ_CASCADE, + &irq_domain_ops, 0); + +#if defined(CONFIG_MIPS_MT_SMP) + if (cpu_has_vint) { + pr_info("Setting up IPI vectored interrupts\n"); + set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ltq_sw0_irqdispatch); + set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ltq_sw1_irqdispatch); + } + arch_init_ipiirq(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ, + &irq_resched); + arch_init_ipiirq(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ, &irq_call); +#endif + +#ifndef CONFIG_MIPS_MT_SMP + set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | + IE_IRQ3 | IE_IRQ4 | IE_IRQ5); +#else + set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 | + IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5); +#endif + + /* tell oprofile which irq to use */ + ltq_perfcount_irq = irq_create_mapping(ltq_domain, LTQ_PERF_IRQ); + + /* + * if the timer irq is not one of the mips irqs we need to + * create a mapping + */ + if (MIPS_CPU_TIMER_IRQ != 7) + irq_create_mapping(ltq_domain, MIPS_CPU_TIMER_IRQ); + + /* the external interrupts are optional and xway only */ + eiu_node = of_find_compatible_node(NULL, NULL, "lantiq,eiu-xway"); + if (eiu_node && !of_address_to_resource(eiu_node, 0, &res)) { + /* find out how many external irq sources we have */ + exin_avail = of_irq_count(eiu_node); + + if (exin_avail > MAX_EIU) + exin_avail = MAX_EIU; + + ret = of_irq_to_resource_table(eiu_node, + ltq_eiu_irq, exin_avail); + if (ret != exin_avail) + panic("failed to load external irq resources"); + + if (request_mem_region(res.start, resource_size(&res), + res.name) < 0) + pr_err("Failed to request eiu memory"); + + ltq_eiu_membase = ioremap_nocache(res.start, + resource_size(&res)); + if (!ltq_eiu_membase) + panic("Failed to remap eiu memory"); + } + + return 0; +} + +int get_c0_perfcount_int(void) +{ + return ltq_perfcount_irq; +} + +unsigned int get_c0_compare_int(void) +{ + return MIPS_CPU_TIMER_IRQ; +} + +static struct of_device_id __initdata of_irq_ids[] = { + { .compatible = "lantiq,icu", .data = icu_of_init }, + {}, +}; + +void __init arch_init_irq(void) +{ + of_irq_init(of_irq_ids); +} diff --git a/kernel/arch/mips/lantiq/prom.c b/kernel/arch/mips/lantiq/prom.c new file mode 100644 index 000000000..0db099ecc --- /dev/null +++ b/kernel/arch/mips/lantiq/prom.c @@ -0,0 +1,110 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + */ + +#include <linux/export.h> +#include <linux/clk.h> +#include <linux/bootmem.h> +#include <linux/of_platform.h> +#include <linux/of_fdt.h> + +#include <asm/bootinfo.h> +#include <asm/time.h> +#include <asm/prom.h> + +#include <lantiq.h> + +#include "prom.h" +#include "clk.h" + +/* access to the ebu needs to be locked between different drivers */ +DEFINE_SPINLOCK(ebu_lock); +EXPORT_SYMBOL_GPL(ebu_lock); + +/* + * this struct is filled by the soc specific detection code and holds + * information about the specific soc type, revision and name + */ +static struct ltq_soc_info soc_info; + +const char *get_system_type(void) +{ + return soc_info.sys_type; +} + +int ltq_soc_type(void) +{ + return soc_info.type; +} + +void __init prom_free_prom_memory(void) +{ +} + +static void __init prom_init_cmdline(void) +{ + int argc = fw_arg0; + char **argv = (char **) KSEG1ADDR(fw_arg1); + int i; + + arcs_cmdline[0] = '\0'; + + for (i = 0; i < argc; i++) { + char *p = (char *) KSEG1ADDR(argv[i]); + + if (CPHYSADDR(p) && *p) { + strlcat(arcs_cmdline, p, sizeof(arcs_cmdline)); + strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); + } + } +} + +void __init plat_mem_setup(void) +{ + ioport_resource.start = IOPORT_RESOURCE_START; + ioport_resource.end = IOPORT_RESOURCE_END; + iomem_resource.start = IOMEM_RESOURCE_START; + iomem_resource.end = IOMEM_RESOURCE_END; + + set_io_port_base((unsigned long) KSEG1); + + /* + * Load the builtin devicetree. This causes the chosen node to be + * parsed resulting in our memory appearing + */ + __dt_setup_arch(__dtb_start); + + strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE); +} + +void __init device_tree_init(void) +{ + unflatten_and_copy_device_tree(); +} + +void __init prom_init(void) +{ + /* call the soc specific detetcion code and get it to fill soc_info */ + ltq_soc_detect(&soc_info); + snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s", + soc_info.name, soc_info.rev_type); + soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0'; + pr_info("SoC: %s\n", soc_info.sys_type); + prom_init_cmdline(); + +#if defined(CONFIG_MIPS_MT_SMP) + if (register_vsmp_smp_ops()) + panic("failed to register_vsmp_smp_ops()"); +#endif +} + +int __init plat_of_setup(void) +{ + return __dt_register_buses(soc_info.compatible, "simple-bus"); +} + +arch_initcall(plat_of_setup); diff --git a/kernel/arch/mips/lantiq/prom.h b/kernel/arch/mips/lantiq/prom.h new file mode 100644 index 000000000..bfd2d58c1 --- /dev/null +++ b/kernel/arch/mips/lantiq/prom.h @@ -0,0 +1,29 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + */ + +#ifndef _LTQ_PROM_H__ +#define _LTQ_PROM_H__ + +#define LTQ_SYS_TYPE_LEN 0x100 +#define LTQ_SYS_REV_LEN 0x10 + +struct ltq_soc_info { + unsigned char *name; + unsigned int rev; + unsigned char rev_type[LTQ_SYS_REV_LEN]; + unsigned int srev; + unsigned int partnum; + unsigned int type; + unsigned char sys_type[LTQ_SYS_TYPE_LEN]; + unsigned char *compatible; +}; + +extern void ltq_soc_detect(struct ltq_soc_info *i); +extern void ltq_soc_init(void); + +#endif diff --git a/kernel/arch/mips/lantiq/xway/Makefile b/kernel/arch/mips/lantiq/xway/Makefile new file mode 100644 index 000000000..a2edc538f --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/Makefile @@ -0,0 +1,5 @@ +obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o dcdc.o + +obj-y += vmmc.o + +obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o diff --git a/kernel/arch/mips/lantiq/xway/clk.c b/kernel/arch/mips/lantiq/xway/clk.c new file mode 100644 index 000000000..8750dc0a1 --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/clk.c @@ -0,0 +1,193 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + */ + +#include <linux/io.h> +#include <linux/export.h> +#include <linux/clk.h> + +#include <asm/time.h> +#include <asm/irq.h> +#include <asm/div64.h> + +#include <lantiq_soc.h> + +#include "../clk.h" + +static unsigned int ram_clocks[] = { + CLOCK_167M, CLOCK_133M, CLOCK_111M, CLOCK_83M }; +#define DDR_HZ ram_clocks[ltq_cgu_r32(CGU_SYS) & 0x3] + +/* legacy xway clock */ +#define CGU_SYS 0x10 + +/* vr9 clock */ +#define CGU_SYS_VR9 0x0c +#define CGU_IF_CLK_VR9 0x24 + +unsigned long ltq_danube_fpi_hz(void) +{ + unsigned long ddr_clock = DDR_HZ; + + if (ltq_cgu_r32(CGU_SYS) & 0x40) + return ddr_clock >> 1; + return ddr_clock; +} + +unsigned long ltq_danube_cpu_hz(void) +{ + switch (ltq_cgu_r32(CGU_SYS) & 0xc) { + case 0: + return CLOCK_333M; + case 4: + return DDR_HZ; + case 8: + return DDR_HZ << 1; + default: + return DDR_HZ >> 1; + } +} + +unsigned long ltq_danube_pp32_hz(void) +{ + unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 7) & 3; + unsigned long clk; + + switch (clksys) { + case 1: + clk = CLOCK_240M; + break; + case 2: + clk = CLOCK_222M; + break; + case 3: + clk = CLOCK_133M; + break; + default: + clk = CLOCK_266M; + break; + } + + return clk; +} + +unsigned long ltq_ar9_sys_hz(void) +{ + if (((ltq_cgu_r32(CGU_SYS) >> 3) & 0x3) == 0x2) + return CLOCK_393M; + return CLOCK_333M; +} + +unsigned long ltq_ar9_fpi_hz(void) +{ + unsigned long sys = ltq_ar9_sys_hz(); + + if (ltq_cgu_r32(CGU_SYS) & BIT(0)) + return sys; + return sys >> 1; +} + +unsigned long ltq_ar9_cpu_hz(void) +{ + if (ltq_cgu_r32(CGU_SYS) & BIT(2)) + return ltq_ar9_fpi_hz(); + else + return ltq_ar9_sys_hz(); +} + +unsigned long ltq_vr9_cpu_hz(void) +{ + unsigned int cpu_sel; + unsigned long clk; + + cpu_sel = (ltq_cgu_r32(CGU_SYS_VR9) >> 4) & 0xf; + + switch (cpu_sel) { + case 0: + clk = CLOCK_600M; + break; + case 1: + clk = CLOCK_500M; + break; + case 2: + clk = CLOCK_393M; + break; + case 3: + clk = CLOCK_333M; + break; + case 5: + case 6: + clk = CLOCK_196_608M; + break; + case 7: + clk = CLOCK_167M; + break; + case 4: + case 8: + case 9: + clk = CLOCK_125M; + break; + default: + clk = 0; + break; + } + + return clk; +} + +unsigned long ltq_vr9_fpi_hz(void) +{ + unsigned int ocp_sel, cpu_clk; + unsigned long clk; + + cpu_clk = ltq_vr9_cpu_hz(); + ocp_sel = ltq_cgu_r32(CGU_SYS_VR9) & 0x3; + + switch (ocp_sel) { + case 0: + /* OCP ratio 1 */ + clk = cpu_clk; + break; + case 2: + /* OCP ratio 2 */ + clk = cpu_clk / 2; + break; + case 3: + /* OCP ratio 2.5 */ + clk = (cpu_clk * 2) / 5; + break; + case 4: + /* OCP ratio 3 */ + clk = cpu_clk / 3; + break; + default: + clk = 0; + break; + } + + return clk; +} + +unsigned long ltq_vr9_pp32_hz(void) +{ + unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 16) & 3; + unsigned long clk; + + switch (clksys) { + case 1: + clk = CLOCK_450M; + break; + case 2: + clk = CLOCK_300M; + break; + default: + clk = CLOCK_500M; + break; + } + + return clk; +} diff --git a/kernel/arch/mips/lantiq/xway/dcdc.c b/kernel/arch/mips/lantiq/xway/dcdc.c new file mode 100644 index 000000000..ae8e930f5 --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/dcdc.c @@ -0,0 +1,62 @@ +/* + * 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) 2012 John Crispin <blogic@openwrt.org> + * Copyright (C) 2010 Sameer Ahmad, Lantiq GmbH + */ + +#include <linux/ioport.h> +#include <linux/of_platform.h> + +#include <lantiq_soc.h> + +/* Bias and regulator Setup Register */ +#define DCDC_BIAS_VREG0 0xa +/* Bias and regulator Setup Register */ +#define DCDC_BIAS_VREG1 0xb + +#define dcdc_w8(x, y) ltq_w8((x), dcdc_membase + (y)) +#define dcdc_r8(x) ltq_r8(dcdc_membase + (x)) + +static void __iomem *dcdc_membase; + +static int dcdc_probe(struct platform_device *pdev) +{ + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + dcdc_membase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(dcdc_membase)) + return PTR_ERR(dcdc_membase); + + dev_info(&pdev->dev, "Core Voltage : %d mV\n", + dcdc_r8(DCDC_BIAS_VREG1) * 8); + + return 0; +} + +static const struct of_device_id dcdc_match[] = { + { .compatible = "lantiq,dcdc-xrx200" }, + {}, +}; + +static struct platform_driver dcdc_driver = { + .probe = dcdc_probe, + .driver = { + .name = "dcdc-xrx200", + .of_match_table = dcdc_match, + }, +}; + +int __init dcdc_init(void) +{ + int ret = platform_driver_register(&dcdc_driver); + + if (ret) + pr_info("dcdc: Error registering platform driver\n"); + return ret; +} + +arch_initcall(dcdc_init); diff --git a/kernel/arch/mips/lantiq/xway/dma.c b/kernel/arch/mips/lantiq/xway/dma.c new file mode 100644 index 000000000..34a116e84 --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/dma.c @@ -0,0 +1,274 @@ +/* + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2011 John Crispin <blogic@openwrt.org> + */ + +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/err.h> + +#include <lantiq_soc.h> +#include <xway_dma.h> + +#define LTQ_DMA_ID 0x08 +#define LTQ_DMA_CTRL 0x10 +#define LTQ_DMA_CPOLL 0x14 +#define LTQ_DMA_CS 0x18 +#define LTQ_DMA_CCTRL 0x1C +#define LTQ_DMA_CDBA 0x20 +#define LTQ_DMA_CDLEN 0x24 +#define LTQ_DMA_CIS 0x28 +#define LTQ_DMA_CIE 0x2C +#define LTQ_DMA_PS 0x40 +#define LTQ_DMA_PCTRL 0x44 +#define LTQ_DMA_IRNEN 0xf4 + +#define DMA_DESCPT BIT(3) /* descriptor complete irq */ +#define DMA_TX BIT(8) /* TX channel direction */ +#define DMA_CHAN_ON BIT(0) /* channel on / off bit */ +#define DMA_PDEN BIT(6) /* enable packet drop */ +#define DMA_CHAN_RST BIT(1) /* channel on / off bit */ +#define DMA_RESET BIT(0) /* channel on / off bit */ +#define DMA_IRQ_ACK 0x7e /* IRQ status register */ +#define DMA_POLL BIT(31) /* turn on channel polling */ +#define DMA_CLK_DIV4 BIT(6) /* polling clock divider */ +#define DMA_2W_BURST BIT(1) /* 2 word burst length */ +#define DMA_MAX_CHANNEL 20 /* the soc has 20 channels */ +#define DMA_ETOP_ENDIANNESS (0xf << 8) /* endianness swap etop channels */ +#define DMA_WEIGHT (BIT(17) | BIT(16)) /* default channel wheight */ + +#define ltq_dma_r32(x) ltq_r32(ltq_dma_membase + (x)) +#define ltq_dma_w32(x, y) ltq_w32(x, ltq_dma_membase + (y)) +#define ltq_dma_w32_mask(x, y, z) ltq_w32_mask(x, y, \ + ltq_dma_membase + (z)) + +static void __iomem *ltq_dma_membase; + +void +ltq_dma_enable_irq(struct ltq_dma_channel *ch) +{ + unsigned long flags; + + local_irq_save(flags); + ltq_dma_w32(ch->nr, LTQ_DMA_CS); + ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN); + local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(ltq_dma_enable_irq); + +void +ltq_dma_disable_irq(struct ltq_dma_channel *ch) +{ + unsigned long flags; + + local_irq_save(flags); + ltq_dma_w32(ch->nr, LTQ_DMA_CS); + ltq_dma_w32_mask(1 << ch->nr, 0, LTQ_DMA_IRNEN); + local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(ltq_dma_disable_irq); + +void +ltq_dma_ack_irq(struct ltq_dma_channel *ch) +{ + unsigned long flags; + + local_irq_save(flags); + ltq_dma_w32(ch->nr, LTQ_DMA_CS); + ltq_dma_w32(DMA_IRQ_ACK, LTQ_DMA_CIS); + local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(ltq_dma_ack_irq); + +void +ltq_dma_open(struct ltq_dma_channel *ch) +{ + unsigned long flag; + + local_irq_save(flag); + ltq_dma_w32(ch->nr, LTQ_DMA_CS); + ltq_dma_w32_mask(0, DMA_CHAN_ON, LTQ_DMA_CCTRL); + ltq_dma_enable_irq(ch); + local_irq_restore(flag); +} +EXPORT_SYMBOL_GPL(ltq_dma_open); + +void +ltq_dma_close(struct ltq_dma_channel *ch) +{ + unsigned long flag; + + local_irq_save(flag); + ltq_dma_w32(ch->nr, LTQ_DMA_CS); + ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL); + ltq_dma_disable_irq(ch); + local_irq_restore(flag); +} +EXPORT_SYMBOL_GPL(ltq_dma_close); + +static void +ltq_dma_alloc(struct ltq_dma_channel *ch) +{ + unsigned long flags; + + ch->desc = 0; + ch->desc_base = dma_alloc_coherent(NULL, + LTQ_DESC_NUM * LTQ_DESC_SIZE, + &ch->phys, GFP_ATOMIC); + memset(ch->desc_base, 0, LTQ_DESC_NUM * LTQ_DESC_SIZE); + + local_irq_save(flags); + ltq_dma_w32(ch->nr, LTQ_DMA_CS); + ltq_dma_w32(ch->phys, LTQ_DMA_CDBA); + ltq_dma_w32(LTQ_DESC_NUM, LTQ_DMA_CDLEN); + ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL); + wmb(); + ltq_dma_w32_mask(0, DMA_CHAN_RST, LTQ_DMA_CCTRL); + while (ltq_dma_r32(LTQ_DMA_CCTRL) & DMA_CHAN_RST) + ; + local_irq_restore(flags); +} + +void +ltq_dma_alloc_tx(struct ltq_dma_channel *ch) +{ + unsigned long flags; + + ltq_dma_alloc(ch); + + local_irq_save(flags); + ltq_dma_w32(DMA_DESCPT, LTQ_DMA_CIE); + ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN); + ltq_dma_w32(DMA_WEIGHT | DMA_TX, LTQ_DMA_CCTRL); + local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(ltq_dma_alloc_tx); + +void +ltq_dma_alloc_rx(struct ltq_dma_channel *ch) +{ + unsigned long flags; + + ltq_dma_alloc(ch); + + local_irq_save(flags); + ltq_dma_w32(DMA_DESCPT, LTQ_DMA_CIE); + ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN); + ltq_dma_w32(DMA_WEIGHT, LTQ_DMA_CCTRL); + local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(ltq_dma_alloc_rx); + +void +ltq_dma_free(struct ltq_dma_channel *ch) +{ + if (!ch->desc_base) + return; + ltq_dma_close(ch); + dma_free_coherent(NULL, LTQ_DESC_NUM * LTQ_DESC_SIZE, + ch->desc_base, ch->phys); +} +EXPORT_SYMBOL_GPL(ltq_dma_free); + +void +ltq_dma_init_port(int p) +{ + ltq_dma_w32(p, LTQ_DMA_PS); + switch (p) { + case DMA_PORT_ETOP: + /* + * Tell the DMA engine to swap the endianness of data frames and + * drop packets if the channel arbitration fails. + */ + ltq_dma_w32_mask(0, DMA_ETOP_ENDIANNESS | DMA_PDEN, + LTQ_DMA_PCTRL); + break; + + case DMA_PORT_DEU: + ltq_dma_w32((DMA_2W_BURST << 4) | (DMA_2W_BURST << 2), + LTQ_DMA_PCTRL); + break; + + default: + break; + } +} +EXPORT_SYMBOL_GPL(ltq_dma_init_port); + +static int +ltq_dma_init(struct platform_device *pdev) +{ + struct clk *clk; + struct resource *res; + unsigned id; + int i; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ltq_dma_membase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ltq_dma_membase)) + panic("Failed to remap dma resource"); + + /* power up and reset the dma engine */ + clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) + panic("Failed to get dma clock"); + + clk_enable(clk); + ltq_dma_w32_mask(0, DMA_RESET, LTQ_DMA_CTRL); + + /* disable all interrupts */ + ltq_dma_w32(0, LTQ_DMA_IRNEN); + + /* reset/configure each channel */ + for (i = 0; i < DMA_MAX_CHANNEL; i++) { + ltq_dma_w32(i, LTQ_DMA_CS); + ltq_dma_w32(DMA_CHAN_RST, LTQ_DMA_CCTRL); + ltq_dma_w32(DMA_POLL | DMA_CLK_DIV4, LTQ_DMA_CPOLL); + ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL); + } + + id = ltq_dma_r32(LTQ_DMA_ID); + dev_info(&pdev->dev, + "Init done - hw rev: %X, ports: %d, channels: %d\n", + id & 0x1f, (id >> 16) & 0xf, id >> 20); + + return 0; +} + +static const struct of_device_id dma_match[] = { + { .compatible = "lantiq,dma-xway" }, + {}, +}; +MODULE_DEVICE_TABLE(of, dma_match); + +static struct platform_driver dma_driver = { + .probe = ltq_dma_init, + .driver = { + .name = "dma-xway", + .of_match_table = dma_match, + }, +}; + +int __init +dma_init(void) +{ + return platform_driver_register(&dma_driver); +} + +postcore_initcall(dma_init); diff --git a/kernel/arch/mips/lantiq/xway/gptu.c b/kernel/arch/mips/lantiq/xway/gptu.c new file mode 100644 index 000000000..f1492b2db --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/gptu.c @@ -0,0 +1,209 @@ +/* + * 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) 2012 John Crispin <blogic@openwrt.org> + * Copyright (C) 2012 Lantiq GmbH + */ + +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/of_irq.h> + +#include <lantiq_soc.h> +#include "../clk.h" + +/* the magic ID byte of the core */ +#define GPTU_MAGIC 0x59 +/* clock control register */ +#define GPTU_CLC 0x00 +/* id register */ +#define GPTU_ID 0x08 +/* interrupt node enable */ +#define GPTU_IRNEN 0xf4 +/* interrupt control register */ +#define GPTU_IRCR 0xf8 +/* interrupt capture register */ +#define GPTU_IRNCR 0xfc +/* there are 3 identical blocks of 2 timers. calculate register offsets */ +#define GPTU_SHIFT(x) (x % 2 ? 4 : 0) +#define GPTU_BASE(x) (((x >> 1) * 0x20) + 0x10) +/* timer control register */ +#define GPTU_CON(x) (GPTU_BASE(x) + GPTU_SHIFT(x) + 0x00) +/* timer auto reload register */ +#define GPTU_RUN(x) (GPTU_BASE(x) + GPTU_SHIFT(x) + 0x08) +/* timer manual reload register */ +#define GPTU_RLD(x) (GPTU_BASE(x) + GPTU_SHIFT(x) + 0x10) +/* timer count register */ +#define GPTU_CNT(x) (GPTU_BASE(x) + GPTU_SHIFT(x) + 0x18) + +/* GPTU_CON(x) */ +#define CON_CNT BIT(2) +#define CON_EDGE_ANY (BIT(7) | BIT(6)) +#define CON_SYNC BIT(8) +#define CON_CLK_INT BIT(10) + +/* GPTU_RUN(x) */ +#define RUN_SEN BIT(0) +#define RUN_RL BIT(2) + +/* set clock to runmode */ +#define CLC_RMC BIT(8) +/* bring core out of suspend */ +#define CLC_SUSPEND BIT(4) +/* the disable bit */ +#define CLC_DISABLE BIT(0) + +#define gptu_w32(x, y) ltq_w32((x), gptu_membase + (y)) +#define gptu_r32(x) ltq_r32(gptu_membase + (x)) + +enum gptu_timer { + TIMER1A = 0, + TIMER1B, + TIMER2A, + TIMER2B, + TIMER3A, + TIMER3B +}; + +static void __iomem *gptu_membase; +static struct resource irqres[6]; + +static irqreturn_t timer_irq_handler(int irq, void *priv) +{ + int timer = irq - irqres[0].start; + gptu_w32(1 << timer, GPTU_IRNCR); + return IRQ_HANDLED; +} + +static void gptu_hwinit(void) +{ + gptu_w32(0x00, GPTU_IRNEN); + gptu_w32(0xff, GPTU_IRNCR); + gptu_w32(CLC_RMC | CLC_SUSPEND, GPTU_CLC); +} + +static void gptu_hwexit(void) +{ + gptu_w32(0x00, GPTU_IRNEN); + gptu_w32(0xff, GPTU_IRNCR); + gptu_w32(CLC_DISABLE, GPTU_CLC); +} + +static int gptu_enable(struct clk *clk) +{ + int ret = request_irq(irqres[clk->bits].start, timer_irq_handler, + IRQF_TIMER, "gtpu", NULL); + if (ret) { + pr_err("gptu: failed to request irq\n"); + return ret; + } + + gptu_w32(CON_CNT | CON_EDGE_ANY | CON_SYNC | CON_CLK_INT, + GPTU_CON(clk->bits)); + gptu_w32(1, GPTU_RLD(clk->bits)); + gptu_w32(gptu_r32(GPTU_IRNEN) | BIT(clk->bits), GPTU_IRNEN); + gptu_w32(RUN_SEN | RUN_RL, GPTU_RUN(clk->bits)); + return 0; +} + +static void gptu_disable(struct clk *clk) +{ + gptu_w32(0, GPTU_RUN(clk->bits)); + gptu_w32(0, GPTU_CON(clk->bits)); + gptu_w32(0, GPTU_RLD(clk->bits)); + gptu_w32(gptu_r32(GPTU_IRNEN) & ~BIT(clk->bits), GPTU_IRNEN); + free_irq(irqres[clk->bits].start, NULL); +} + +static inline void clkdev_add_gptu(struct device *dev, const char *con, + unsigned int timer) +{ + struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + + clk->cl.dev_id = dev_name(dev); + clk->cl.con_id = con; + clk->cl.clk = clk; + clk->enable = gptu_enable; + clk->disable = gptu_disable; + clk->bits = timer; + clkdev_add(&clk->cl); +} + +static int gptu_probe(struct platform_device *pdev) +{ + struct clk *clk; + struct resource *res; + + if (of_irq_to_resource_table(pdev->dev.of_node, irqres, 6) != 6) { + dev_err(&pdev->dev, "Failed to get IRQ list\n"); + return -EINVAL; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + /* remap gptu register range */ + gptu_membase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(gptu_membase)) + return PTR_ERR(gptu_membase); + + /* enable our clock */ + clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, "Failed to get clock\n"); + return -ENOENT; + } + clk_enable(clk); + + /* power up the core */ + gptu_hwinit(); + + /* the gptu has a ID register */ + if (((gptu_r32(GPTU_ID) >> 8) & 0xff) != GPTU_MAGIC) { + dev_err(&pdev->dev, "Failed to find magic\n"); + gptu_hwexit(); + clk_disable(clk); + clk_put(clk); + return -ENAVAIL; + } + + /* register the clocks */ + clkdev_add_gptu(&pdev->dev, "timer1a", TIMER1A); + clkdev_add_gptu(&pdev->dev, "timer1b", TIMER1B); + clkdev_add_gptu(&pdev->dev, "timer2a", TIMER2A); + clkdev_add_gptu(&pdev->dev, "timer2b", TIMER2B); + clkdev_add_gptu(&pdev->dev, "timer3a", TIMER3A); + clkdev_add_gptu(&pdev->dev, "timer3b", TIMER3B); + + dev_info(&pdev->dev, "gptu: 6 timers loaded\n"); + + return 0; +} + +static const struct of_device_id gptu_match[] = { + { .compatible = "lantiq,gptu-xway" }, + {}, +}; +MODULE_DEVICE_TABLE(of, dma_match); + +static struct platform_driver dma_driver = { + .probe = gptu_probe, + .driver = { + .name = "gptu-xway", + .of_match_table = gptu_match, + }, +}; + +int __init gptu_init(void) +{ + int ret = platform_driver_register(&dma_driver); + + if (ret) + pr_info("gptu: Error registering platform driver\n"); + return ret; +} + +arch_initcall(gptu_init); diff --git a/kernel/arch/mips/lantiq/xway/prom.c b/kernel/arch/mips/lantiq/xway/prom.c new file mode 100644 index 000000000..248429ab2 --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/prom.c @@ -0,0 +1,115 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + */ + +#include <linux/export.h> +#include <linux/clk.h> +#include <asm/bootinfo.h> +#include <asm/time.h> + +#include <lantiq_soc.h> + +#include "../prom.h" + +#define SOC_DANUBE "Danube" +#define SOC_TWINPASS "Twinpass" +#define SOC_AMAZON_SE "Amazon_SE" +#define SOC_AR9 "AR9" +#define SOC_GR9 "GR9" +#define SOC_VR9 "VR9" + +#define COMP_DANUBE "lantiq,danube" +#define COMP_TWINPASS "lantiq,twinpass" +#define COMP_AMAZON_SE "lantiq,ase" +#define COMP_AR9 "lantiq,ar9" +#define COMP_GR9 "lantiq,gr9" +#define COMP_VR9 "lantiq,vr9" + +#define PART_SHIFT 12 +#define PART_MASK 0x0FFFFFFF +#define REV_SHIFT 28 +#define REV_MASK 0xF0000000 + +void __init ltq_soc_detect(struct ltq_soc_info *i) +{ + i->partnum = (ltq_r32(LTQ_MPS_CHIPID) & PART_MASK) >> PART_SHIFT; + i->rev = (ltq_r32(LTQ_MPS_CHIPID) & REV_MASK) >> REV_SHIFT; + sprintf(i->rev_type, "1.%d", i->rev); + switch (i->partnum) { + case SOC_ID_DANUBE1: + case SOC_ID_DANUBE2: + i->name = SOC_DANUBE; + i->type = SOC_TYPE_DANUBE; + i->compatible = COMP_DANUBE; + break; + + case SOC_ID_TWINPASS: + i->name = SOC_TWINPASS; + i->type = SOC_TYPE_DANUBE; + i->compatible = COMP_TWINPASS; + break; + + case SOC_ID_ARX188: + case SOC_ID_ARX168_1: + case SOC_ID_ARX168_2: + case SOC_ID_ARX182: + i->name = SOC_AR9; + i->type = SOC_TYPE_AR9; + i->compatible = COMP_AR9; + break; + + case SOC_ID_GRX188: + case SOC_ID_GRX168: + i->name = SOC_GR9; + i->type = SOC_TYPE_AR9; + i->compatible = COMP_GR9; + break; + + case SOC_ID_AMAZON_SE_1: + case SOC_ID_AMAZON_SE_2: +#ifdef CONFIG_PCI + panic("ase is only supported for non pci kernels"); +#endif + i->name = SOC_AMAZON_SE; + i->type = SOC_TYPE_AMAZON_SE; + i->compatible = COMP_AMAZON_SE; + break; + + case SOC_ID_VRX282: + case SOC_ID_VRX268: + case SOC_ID_VRX288: + i->name = SOC_VR9; + i->type = SOC_TYPE_VR9; + i->compatible = COMP_VR9; + break; + + case SOC_ID_GRX268: + case SOC_ID_GRX288: + i->name = SOC_GR9; + i->type = SOC_TYPE_VR9; + i->compatible = COMP_GR9; + break; + + case SOC_ID_VRX268_2: + case SOC_ID_VRX288_2: + i->name = SOC_VR9; + i->type = SOC_TYPE_VR9_2; + i->compatible = COMP_VR9; + break; + + case SOC_ID_GRX282_2: + case SOC_ID_GRX288_2: + i->name = SOC_GR9; + i->type = SOC_TYPE_VR9_2; + i->compatible = COMP_GR9; + break; + + default: + unreachable(); + break; + } +} diff --git a/kernel/arch/mips/lantiq/xway/reset.c b/kernel/arch/mips/lantiq/xway/reset.c new file mode 100644 index 000000000..fe68f9ae4 --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/reset.c @@ -0,0 +1,233 @@ +/* + * 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) 2010 John Crispin <blogic@openwrt.org> + */ + +#include <linux/init.h> +#include <linux/io.h> +#include <linux/ioport.h> +#include <linux/pm.h> +#include <linux/export.h> +#include <linux/delay.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/reset-controller.h> + +#include <asm/reboot.h> + +#include <lantiq_soc.h> + +#include "../prom.h" + +#define ltq_rcu_w32(x, y) ltq_w32((x), ltq_rcu_membase + (y)) +#define ltq_rcu_r32(x) ltq_r32(ltq_rcu_membase + (x)) + +/* reset request register */ +#define RCU_RST_REQ 0x0010 +/* reset status register */ +#define RCU_RST_STAT 0x0014 +/* vr9 gphy registers */ +#define RCU_GFS_ADD0_XRX200 0x0020 +#define RCU_GFS_ADD1_XRX200 0x0068 + +/* reboot bit */ +#define RCU_RD_GPHY0_XRX200 BIT(31) +#define RCU_RD_SRST BIT(30) +#define RCU_RD_GPHY1_XRX200 BIT(29) + +/* reset cause */ +#define RCU_STAT_SHIFT 26 +/* boot selection */ +#define RCU_BOOT_SEL(x) ((x >> 18) & 0x7) +#define RCU_BOOT_SEL_XRX200(x) (((x >> 17) & 0xf) | ((x >> 8) & 0x10)) + +/* remapped base addr of the reset control unit */ +static void __iomem *ltq_rcu_membase; +static struct device_node *ltq_rcu_np; + +/* This function is used by the watchdog driver */ +int ltq_reset_cause(void) +{ + u32 val = ltq_rcu_r32(RCU_RST_STAT); + return val >> RCU_STAT_SHIFT; +} +EXPORT_SYMBOL_GPL(ltq_reset_cause); + +/* allow platform code to find out what source we booted from */ +unsigned char ltq_boot_select(void) +{ + u32 val = ltq_rcu_r32(RCU_RST_STAT); + + if (of_device_is_compatible(ltq_rcu_np, "lantiq,rcu-xrx200")) + return RCU_BOOT_SEL_XRX200(val); + + return RCU_BOOT_SEL(val); +} + +/* reset / boot a gphy */ +static struct ltq_xrx200_gphy_reset { + u32 rd; + u32 addr; +} xrx200_gphy[] = { + {RCU_RD_GPHY0_XRX200, RCU_GFS_ADD0_XRX200}, + {RCU_RD_GPHY1_XRX200, RCU_GFS_ADD1_XRX200}, +}; + +/* reset and boot a gphy. these phys only exist on xrx200 SoC */ +int xrx200_gphy_boot(struct device *dev, unsigned int id, dma_addr_t dev_addr) +{ + struct clk *clk; + + if (!of_device_is_compatible(ltq_rcu_np, "lantiq,rcu-xrx200")) { + dev_err(dev, "this SoC has no GPHY\n"); + return -EINVAL; + } + + clk = clk_get_sys("1f203000.rcu", "gphy"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + clk_enable(clk); + + if (id > 1) { + dev_err(dev, "%u is an invalid gphy id\n", id); + return -EINVAL; + } + dev_info(dev, "booting GPHY%u firmware at %X\n", id, dev_addr); + + ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | xrx200_gphy[id].rd, + RCU_RST_REQ); + ltq_rcu_w32(dev_addr, xrx200_gphy[id].addr); + ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~xrx200_gphy[id].rd, + RCU_RST_REQ); + return 0; +} + +/* reset a io domain for u micro seconds */ +void ltq_reset_once(unsigned int module, ulong u) +{ + ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | module, RCU_RST_REQ); + udelay(u); + ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~module, RCU_RST_REQ); +} + +static int ltq_assert_device(struct reset_controller_dev *rcdev, + unsigned long id) +{ + u32 val; + + if (id < 8) + return -1; + + val = ltq_rcu_r32(RCU_RST_REQ); + val |= BIT(id); + ltq_rcu_w32(val, RCU_RST_REQ); + + return 0; +} + +static int ltq_deassert_device(struct reset_controller_dev *rcdev, + unsigned long id) +{ + u32 val; + + if (id < 8) + return -1; + + val = ltq_rcu_r32(RCU_RST_REQ); + val &= ~BIT(id); + ltq_rcu_w32(val, RCU_RST_REQ); + + return 0; +} + +static int ltq_reset_device(struct reset_controller_dev *rcdev, + unsigned long id) +{ + ltq_assert_device(rcdev, id); + return ltq_deassert_device(rcdev, id); +} + +static struct reset_control_ops reset_ops = { + .reset = ltq_reset_device, + .assert = ltq_assert_device, + .deassert = ltq_deassert_device, +}; + +static struct reset_controller_dev reset_dev = { + .ops = &reset_ops, + .owner = THIS_MODULE, + .nr_resets = 32, + .of_reset_n_cells = 1, +}; + +void ltq_rst_init(void) +{ + reset_dev.of_node = of_find_compatible_node(NULL, NULL, + "lantiq,xway-reset"); + if (!reset_dev.of_node) + pr_err("Failed to find reset controller node"); + else + reset_controller_register(&reset_dev); +} + +static void ltq_machine_restart(char *command) +{ + u32 val = ltq_rcu_r32(RCU_RST_REQ); + + if (of_device_is_compatible(ltq_rcu_np, "lantiq,rcu-xrx200")) + val |= RCU_RD_GPHY1_XRX200 | RCU_RD_GPHY0_XRX200; + + val |= RCU_RD_SRST; + + local_irq_disable(); + ltq_rcu_w32(val, RCU_RST_REQ); + unreachable(); +} + +static void ltq_machine_halt(void) +{ + local_irq_disable(); + unreachable(); +} + +static void ltq_machine_power_off(void) +{ + local_irq_disable(); + unreachable(); +} + +static int __init mips_reboot_setup(void) +{ + struct resource res; + + ltq_rcu_np = of_find_compatible_node(NULL, NULL, "lantiq,rcu-xway"); + if (!ltq_rcu_np) + ltq_rcu_np = of_find_compatible_node(NULL, NULL, + "lantiq,rcu-xrx200"); + + /* check if all the reset register range is available */ + if (!ltq_rcu_np) + panic("Failed to load reset resources from devicetree"); + + if (of_address_to_resource(ltq_rcu_np, 0, &res)) + panic("Failed to get rcu memory range"); + + if (request_mem_region(res.start, resource_size(&res), res.name) < 0) + pr_err("Failed to request rcu memory"); + + ltq_rcu_membase = ioremap_nocache(res.start, resource_size(&res)); + if (!ltq_rcu_membase) + panic("Failed to remap core memory"); + + _machine_restart = ltq_machine_restart; + _machine_halt = ltq_machine_halt; + pm_power_off = ltq_machine_power_off; + + return 0; +} + +arch_initcall(mips_reboot_setup); diff --git a/kernel/arch/mips/lantiq/xway/sysctrl.c b/kernel/arch/mips/lantiq/xway/sysctrl.c new file mode 100644 index 000000000..2b15491de --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/sysctrl.c @@ -0,0 +1,388 @@ +/* + * 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) 2011-2012 John Crispin <blogic@openwrt.org> + */ + +#include <linux/ioport.h> +#include <linux/export.h> +#include <linux/clkdev.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> + +#include <lantiq_soc.h> + +#include "../clk.h" +#include "../prom.h" + +/* clock control register */ +#define CGU_IFCCR 0x0018 +#define CGU_IFCCR_VR9 0x0024 +/* system clock register */ +#define CGU_SYS 0x0010 +/* pci control register */ +#define CGU_PCICR 0x0034 +#define CGU_PCICR_VR9 0x0038 +/* ephy configuration register */ +#define CGU_EPHY 0x10 +/* power control register */ +#define PMU_PWDCR 0x1C +/* power status register */ +#define PMU_PWDSR 0x20 +/* power control register */ +#define PMU_PWDCR1 0x24 +/* power status register */ +#define PMU_PWDSR1 0x28 +/* power control register */ +#define PWDCR(x) ((x) ? (PMU_PWDCR1) : (PMU_PWDCR)) +/* power status register */ +#define PWDSR(x) ((x) ? (PMU_PWDSR1) : (PMU_PWDSR)) + +/* clock gates that we can en/disable */ +#define PMU_USB0_P BIT(0) +#define PMU_PCI BIT(4) +#define PMU_DMA BIT(5) +#define PMU_USB0 BIT(6) +#define PMU_ASC0 BIT(7) +#define PMU_EPHY BIT(7) /* ase */ +#define PMU_SPI BIT(8) +#define PMU_DFE BIT(9) +#define PMU_EBU BIT(10) +#define PMU_STP BIT(11) +#define PMU_GPT BIT(12) +#define PMU_AHBS BIT(13) /* vr9 */ +#define PMU_FPI BIT(14) +#define PMU_AHBM BIT(15) +#define PMU_ASC1 BIT(17) +#define PMU_PPE_QSB BIT(18) +#define PMU_PPE_SLL01 BIT(19) +#define PMU_PPE_TC BIT(21) +#define PMU_PPE_EMA BIT(22) +#define PMU_PPE_DPLUM BIT(23) +#define PMU_PPE_DPLUS BIT(24) +#define PMU_USB1_P BIT(26) +#define PMU_USB1 BIT(27) +#define PMU_SWITCH BIT(28) +#define PMU_PPE_TOP BIT(29) +#define PMU_GPHY BIT(30) +#define PMU_PCIE_CLK BIT(31) + +#define PMU1_PCIE_PHY BIT(0) +#define PMU1_PCIE_CTL BIT(1) +#define PMU1_PCIE_PDI BIT(4) +#define PMU1_PCIE_MSI BIT(5) + +#define pmu_w32(x, y) ltq_w32((x), pmu_membase + (y)) +#define pmu_r32(x) ltq_r32(pmu_membase + (x)) + +static void __iomem *pmu_membase; +void __iomem *ltq_cgu_membase; +void __iomem *ltq_ebu_membase; + +static u32 ifccr = CGU_IFCCR; +static u32 pcicr = CGU_PCICR; + +/* legacy function kept alive to ease clkdev transition */ +void ltq_pmu_enable(unsigned int module) +{ + int err = 1000000; + + pmu_w32(pmu_r32(PMU_PWDCR) & ~module, PMU_PWDCR); + do {} while (--err && (pmu_r32(PMU_PWDSR) & module)); + + if (!err) + panic("activating PMU module failed!"); +} +EXPORT_SYMBOL(ltq_pmu_enable); + +/* legacy function kept alive to ease clkdev transition */ +void ltq_pmu_disable(unsigned int module) +{ + pmu_w32(pmu_r32(PMU_PWDCR) | module, PMU_PWDCR); +} +EXPORT_SYMBOL(ltq_pmu_disable); + +/* enable a hw clock */ +static int cgu_enable(struct clk *clk) +{ + ltq_cgu_w32(ltq_cgu_r32(ifccr) | clk->bits, ifccr); + return 0; +} + +/* disable a hw clock */ +static void cgu_disable(struct clk *clk) +{ + ltq_cgu_w32(ltq_cgu_r32(ifccr) & ~clk->bits, ifccr); +} + +/* enable a clock gate */ +static int pmu_enable(struct clk *clk) +{ + int retry = 1000000; + + pmu_w32(pmu_r32(PWDCR(clk->module)) & ~clk->bits, + PWDCR(clk->module)); + do {} while (--retry && (pmu_r32(PWDSR(clk->module)) & clk->bits)); + + if (!retry) + panic("activating PMU module failed!"); + + return 0; +} + +/* disable a clock gate */ +static void pmu_disable(struct clk *clk) +{ + pmu_w32(pmu_r32(PWDCR(clk->module)) | clk->bits, + PWDCR(clk->module)); +} + +/* the pci enable helper */ +static int pci_enable(struct clk *clk) +{ + unsigned int val = ltq_cgu_r32(ifccr); + /* set bus clock speed */ + if (of_machine_is_compatible("lantiq,ar9") || + of_machine_is_compatible("lantiq,vr9")) { + val &= ~0x1f00000; + if (clk->rate == CLOCK_33M) + val |= 0xe00000; + else + val |= 0x700000; /* 62.5M */ + } else { + val &= ~0xf00000; + if (clk->rate == CLOCK_33M) + val |= 0x800000; + else + val |= 0x400000; /* 62.5M */ + } + ltq_cgu_w32(val, ifccr); + pmu_enable(clk); + return 0; +} + +/* enable the external clock as a source */ +static int pci_ext_enable(struct clk *clk) +{ + ltq_cgu_w32(ltq_cgu_r32(ifccr) & ~(1 << 16), ifccr); + ltq_cgu_w32((1 << 30), pcicr); + return 0; +} + +/* disable the external clock as a source */ +static void pci_ext_disable(struct clk *clk) +{ + ltq_cgu_w32(ltq_cgu_r32(ifccr) | (1 << 16), ifccr); + ltq_cgu_w32((1 << 31) | (1 << 30), pcicr); +} + +/* enable a clockout source */ +static int clkout_enable(struct clk *clk) +{ + int i; + + /* get the correct rate */ + for (i = 0; i < 4; i++) { + if (clk->rates[i] == clk->rate) { + int shift = 14 - (2 * clk->module); + int enable = 7 - clk->module; + unsigned int val = ltq_cgu_r32(ifccr); + + val &= ~(3 << shift); + val |= i << shift; + val |= enable; + ltq_cgu_w32(val, ifccr); + return 0; + } + } + return -1; +} + +/* manage the clock gates via PMU */ +static void clkdev_add_pmu(const char *dev, const char *con, + unsigned int module, unsigned int bits) +{ + struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + + clk->cl.dev_id = dev; + clk->cl.con_id = con; + clk->cl.clk = clk; + clk->enable = pmu_enable; + clk->disable = pmu_disable; + clk->module = module; + clk->bits = bits; + clkdev_add(&clk->cl); +} + +/* manage the clock generator */ +static void clkdev_add_cgu(const char *dev, const char *con, + unsigned int bits) +{ + struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + + clk->cl.dev_id = dev; + clk->cl.con_id = con; + clk->cl.clk = clk; + clk->enable = cgu_enable; + clk->disable = cgu_disable; + clk->bits = bits; + clkdev_add(&clk->cl); +} + +/* pci needs its own enable function as the setup is a bit more complex */ +static unsigned long valid_pci_rates[] = {CLOCK_33M, CLOCK_62_5M, 0}; + +static void clkdev_add_pci(void) +{ + struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + struct clk *clk_ext = kzalloc(sizeof(struct clk), GFP_KERNEL); + + /* main pci clock */ + clk->cl.dev_id = "17000000.pci"; + clk->cl.con_id = NULL; + clk->cl.clk = clk; + clk->rate = CLOCK_33M; + clk->rates = valid_pci_rates; + clk->enable = pci_enable; + clk->disable = pmu_disable; + clk->module = 0; + clk->bits = PMU_PCI; + clkdev_add(&clk->cl); + + /* use internal/external bus clock */ + clk_ext->cl.dev_id = "17000000.pci"; + clk_ext->cl.con_id = "external"; + clk_ext->cl.clk = clk_ext; + clk_ext->enable = pci_ext_enable; + clk_ext->disable = pci_ext_disable; + clkdev_add(&clk_ext->cl); +} + +/* xway socs can generate clocks on gpio pins */ +static unsigned long valid_clkout_rates[4][5] = { + {CLOCK_32_768K, CLOCK_1_536M, CLOCK_2_5M, CLOCK_12M, 0}, + {CLOCK_40M, CLOCK_12M, CLOCK_24M, CLOCK_48M, 0}, + {CLOCK_25M, CLOCK_40M, CLOCK_30M, CLOCK_60M, 0}, + {CLOCK_12M, CLOCK_50M, CLOCK_32_768K, CLOCK_25M, 0}, +}; + +static void clkdev_add_clkout(void) +{ + int i; + + for (i = 0; i < 4; i++) { + struct clk *clk; + char *name; + + name = kzalloc(sizeof("clkout0"), GFP_KERNEL); + sprintf(name, "clkout%d", i); + + clk = kzalloc(sizeof(struct clk), GFP_KERNEL); + clk->cl.dev_id = "1f103000.cgu"; + clk->cl.con_id = name; + clk->cl.clk = clk; + clk->rate = 0; + clk->rates = valid_clkout_rates[i]; + clk->enable = clkout_enable; + clk->module = i; + clkdev_add(&clk->cl); + } +} + +/* bring up all register ranges that we need for basic system control */ +void __init ltq_soc_init(void) +{ + struct resource res_pmu, res_cgu, res_ebu; + struct device_node *np_pmu = + of_find_compatible_node(NULL, NULL, "lantiq,pmu-xway"); + struct device_node *np_cgu = + of_find_compatible_node(NULL, NULL, "lantiq,cgu-xway"); + struct device_node *np_ebu = + of_find_compatible_node(NULL, NULL, "lantiq,ebu-xway"); + + /* check if all the core register ranges are available */ + if (!np_pmu || !np_cgu || !np_ebu) + panic("Failed to load core nodes from devicetree"); + + if (of_address_to_resource(np_pmu, 0, &res_pmu) || + of_address_to_resource(np_cgu, 0, &res_cgu) || + of_address_to_resource(np_ebu, 0, &res_ebu)) + panic("Failed to get core resources"); + + if ((request_mem_region(res_pmu.start, resource_size(&res_pmu), + res_pmu.name) < 0) || + (request_mem_region(res_cgu.start, resource_size(&res_cgu), + res_cgu.name) < 0) || + (request_mem_region(res_ebu.start, resource_size(&res_ebu), + res_ebu.name) < 0)) + pr_err("Failed to request core resources"); + + pmu_membase = ioremap_nocache(res_pmu.start, resource_size(&res_pmu)); + ltq_cgu_membase = ioremap_nocache(res_cgu.start, + resource_size(&res_cgu)); + ltq_ebu_membase = ioremap_nocache(res_ebu.start, + resource_size(&res_ebu)); + if (!pmu_membase || !ltq_cgu_membase || !ltq_ebu_membase) + panic("Failed to remap core resources"); + + /* make sure to unprotect the memory region where flash is located */ + ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_BUSCON0) & ~EBU_WRDIS, LTQ_EBU_BUSCON0); + + /* add our generic xway clocks */ + clkdev_add_pmu("10000000.fpi", NULL, 0, PMU_FPI); + clkdev_add_pmu("1e100400.serial", NULL, 0, PMU_ASC0); + clkdev_add_pmu("1e100a00.gptu", NULL, 0, PMU_GPT); + clkdev_add_pmu("1e100bb0.stp", NULL, 0, PMU_STP); + clkdev_add_pmu("1e104100.dma", NULL, 0, PMU_DMA); + clkdev_add_pmu("1e100800.spi", NULL, 0, PMU_SPI); + clkdev_add_pmu("1e105300.ebu", NULL, 0, PMU_EBU); + clkdev_add_clkout(); + + /* add the soc dependent clocks */ + if (of_machine_is_compatible("lantiq,vr9")) { + ifccr = CGU_IFCCR_VR9; + pcicr = CGU_PCICR_VR9; + } else { + clkdev_add_pmu("1e180000.etop", NULL, 0, PMU_PPE); + } + + if (!of_machine_is_compatible("lantiq,ase")) { + clkdev_add_pmu("1e100c00.serial", NULL, 0, PMU_ASC1); + clkdev_add_pci(); + } + + if (of_machine_is_compatible("lantiq,ase")) { + if (ltq_cgu_r32(CGU_SYS) & (1 << 5)) + clkdev_add_static(CLOCK_266M, CLOCK_133M, + CLOCK_133M, CLOCK_266M); + else + clkdev_add_static(CLOCK_133M, CLOCK_133M, + CLOCK_133M, CLOCK_133M); + clkdev_add_cgu("1e180000.etop", "ephycgu", CGU_EPHY), + clkdev_add_pmu("1e180000.etop", "ephy", 0, PMU_EPHY); + } else if (of_machine_is_compatible("lantiq,vr9")) { + clkdev_add_static(ltq_vr9_cpu_hz(), ltq_vr9_fpi_hz(), + ltq_vr9_fpi_hz(), ltq_vr9_pp32_hz()); + clkdev_add_pmu("1d900000.pcie", "phy", 1, PMU1_PCIE_PHY); + clkdev_add_pmu("1d900000.pcie", "bus", 0, PMU_PCIE_CLK); + clkdev_add_pmu("1d900000.pcie", "msi", 1, PMU1_PCIE_MSI); + clkdev_add_pmu("1d900000.pcie", "pdi", 1, PMU1_PCIE_PDI); + clkdev_add_pmu("1d900000.pcie", "ctl", 1, PMU1_PCIE_CTL); + clkdev_add_pmu("1d900000.pcie", "ahb", 0, PMU_AHBM | PMU_AHBS); + clkdev_add_pmu("1e108000.eth", NULL, 0, + PMU_SWITCH | PMU_PPE_DPLUS | PMU_PPE_DPLUM | + PMU_PPE_EMA | PMU_PPE_TC | PMU_PPE_SLL01 | + PMU_PPE_QSB | PMU_PPE_TOP); + clkdev_add_pmu("1f203000.rcu", "gphy", 0, PMU_GPHY); + } else if (of_machine_is_compatible("lantiq,ar9")) { + clkdev_add_static(ltq_ar9_cpu_hz(), ltq_ar9_fpi_hz(), + ltq_ar9_fpi_hz(), CLOCK_250M); + clkdev_add_pmu("1e180000.etop", "switch", 0, PMU_SWITCH); + } else { + clkdev_add_static(ltq_danube_cpu_hz(), ltq_danube_fpi_hz(), + ltq_danube_fpi_hz(), ltq_danube_pp32_hz()); + } +} diff --git a/kernel/arch/mips/lantiq/xway/vmmc.c b/kernel/arch/mips/lantiq/xway/vmmc.c new file mode 100644 index 000000000..d001bc389 --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/vmmc.c @@ -0,0 +1,68 @@ +/* + * 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) 2012 John Crispin <blogic@openwrt.org> + */ + +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/of_gpio.h> +#include <linux/dma-mapping.h> + +#include <lantiq_soc.h> + +static unsigned int *cp1_base; + +unsigned int *ltq_get_cp1_base(void) +{ + if (!cp1_base) + panic("no cp1 base was set\n"); + + return cp1_base; +} +EXPORT_SYMBOL(ltq_get_cp1_base); + +static int vmmc_probe(struct platform_device *pdev) +{ +#define CP1_SIZE (1 << 20) + int gpio_count; + dma_addr_t dma; + + cp1_base = + (void *) CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE, + &dma, GFP_ATOMIC)); + + gpio_count = of_gpio_count(pdev->dev.of_node); + while (gpio_count > 0) { + enum of_gpio_flags flags; + int gpio = of_get_gpio_flags(pdev->dev.of_node, + --gpio_count, &flags); + if (gpio_request(gpio, "vmmc-relay")) + continue; + dev_info(&pdev->dev, "requested GPIO %d\n", gpio); + gpio_direction_output(gpio, + (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1)); + } + + dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base); + + return 0; +} + +static const struct of_device_id vmmc_match[] = { + { .compatible = "lantiq,vmmc-xway" }, + {}, +}; +MODULE_DEVICE_TABLE(of, vmmc_match); + +static struct platform_driver vmmc_driver = { + .probe = vmmc_probe, + .driver = { + .name = "lantiq,vmmc", + .of_match_table = vmmc_match, + }, +}; + +module_platform_driver(vmmc_driver); diff --git a/kernel/arch/mips/lantiq/xway/xrx200_phy_fw.c b/kernel/arch/mips/lantiq/xway/xrx200_phy_fw.c new file mode 100644 index 000000000..199094a40 --- /dev/null +++ b/kernel/arch/mips/lantiq/xway/xrx200_phy_fw.c @@ -0,0 +1,117 @@ +/* + * 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) 2012 John Crispin <blogic@openwrt.org> + */ + +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/firmware.h> +#include <linux/of_platform.h> + +#include <lantiq_soc.h> + +#define XRX200_GPHY_FW_ALIGN (16 * 1024) + +static dma_addr_t xway_gphy_load(struct platform_device *pdev) +{ + const struct firmware *fw; + dma_addr_t dev_addr = 0; + const char *fw_name; + void *fw_addr; + size_t size; + + if (of_get_property(pdev->dev.of_node, "firmware1", NULL) || + of_get_property(pdev->dev.of_node, "firmware2", NULL)) { + switch (ltq_soc_type()) { + case SOC_TYPE_VR9: + if (of_property_read_string(pdev->dev.of_node, + "firmware1", &fw_name)) { + dev_err(&pdev->dev, + "failed to load firmware filename\n"); + return 0; + } + break; + case SOC_TYPE_VR9_2: + if (of_property_read_string(pdev->dev.of_node, + "firmware2", &fw_name)) { + dev_err(&pdev->dev, + "failed to load firmware filename\n"); + return 0; + } + break; + } + } else if (of_property_read_string(pdev->dev.of_node, + "firmware", &fw_name)) { + dev_err(&pdev->dev, "failed to load firmware filename\n"); + return 0; + } + + dev_info(&pdev->dev, "requesting %s\n", fw_name); + if (request_firmware(&fw, fw_name, &pdev->dev)) { + dev_err(&pdev->dev, "failed to load firmware: %s\n", fw_name); + return 0; + } + + /* + * GPHY cores need the firmware code in a persistent and contiguous + * memory area with a 16 kB boundary aligned start address + */ + size = fw->size + XRX200_GPHY_FW_ALIGN; + + fw_addr = dma_alloc_coherent(&pdev->dev, size, &dev_addr, GFP_KERNEL); + if (fw_addr) { + fw_addr = PTR_ALIGN(fw_addr, XRX200_GPHY_FW_ALIGN); + dev_addr = ALIGN(dev_addr, XRX200_GPHY_FW_ALIGN); + memcpy(fw_addr, fw->data, fw->size); + } else { + dev_err(&pdev->dev, "failed to alloc firmware memory\n"); + } + + release_firmware(fw); + return dev_addr; +} + +static int xway_phy_fw_probe(struct platform_device *pdev) +{ + dma_addr_t fw_addr; + struct property *pp; + unsigned char *phyids; + int i, ret = 0; + + fw_addr = xway_gphy_load(pdev); + if (!fw_addr) + return -EINVAL; + pp = of_find_property(pdev->dev.of_node, "phys", NULL); + if (!pp) + return -ENOENT; + phyids = pp->value; + for (i = 0; i < pp->length && !ret; i++) + ret = xrx200_gphy_boot(&pdev->dev, phyids[i], fw_addr); + if (!ret) + mdelay(100); + return ret; +} + +static const struct of_device_id xway_phy_match[] = { + { .compatible = "lantiq,phy-xrx200" }, + {}, +}; +MODULE_DEVICE_TABLE(of, xway_phy_match); + +static struct platform_driver xway_phy_driver = { + .probe = xway_phy_fw_probe, + .driver = { + .name = "phy-xrx200", + .of_match_table = xway_phy_match, + }, +}; + +module_platform_driver(xway_phy_driver); + +MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); +MODULE_DESCRIPTION("Lantiq XRX200 PHY Firmware Loader"); +MODULE_LICENSE("GPL"); |