diff options
Diffstat (limited to 'arch/mips/ath25')
| -rw-r--r-- | arch/mips/ath25/Kconfig | 4 | ||||
| -rw-r--r-- | arch/mips/ath25/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/ath25/ar5312.c | 155 | ||||
| -rw-r--r-- | arch/mips/ath25/ar5312.h | 16 | ||||
| -rw-r--r-- | arch/mips/ath25/ar5312_regs.h | 201 | ||||
| -rw-r--r-- | arch/mips/ath25/board.c | 8 |
6 files changed, 386 insertions, 0 deletions
diff --git a/arch/mips/ath25/Kconfig b/arch/mips/ath25/Kconfig new file mode 100644 index 000000000000..cf933ea38044 --- /dev/null +++ b/arch/mips/ath25/Kconfig @@ -0,0 +1,4 @@ +config SOC_AR5312 + bool "Atheros AR5312/AR2312+ SoC support" + depends on ATH25 + default y diff --git a/arch/mips/ath25/Makefile b/arch/mips/ath25/Makefile index 9199fa1508d2..3361619caa9b 100644 --- a/arch/mips/ath25/Makefile +++ b/arch/mips/ath25/Makefile @@ -9,3 +9,5 @@ # obj-y += board.o prom.o devices.o + +obj-$(CONFIG_SOC_AR5312) += ar5312.o diff --git a/arch/mips/ath25/ar5312.c b/arch/mips/ath25/ar5312.c new file mode 100644 index 000000000000..c2adaf2cd73a --- /dev/null +++ b/arch/mips/ath25/ar5312.c @@ -0,0 +1,155 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006-2009 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2012 Alexandros C. Couloumbis <alex@ozo.com> + */ + +/* + * Platform devices for Atheros AR5312 SoCs + */ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/reboot.h> +#include <asm/bootinfo.h> +#include <asm/reboot.h> +#include <asm/time.h> + +#include "devices.h" +#include "ar5312.h" +#include "ar5312_regs.h" + +static void __iomem *ar5312_rst_base; + +static inline u32 ar5312_rst_reg_read(u32 reg) +{ + return __raw_readl(ar5312_rst_base + reg); +} + +static inline void ar5312_rst_reg_write(u32 reg, u32 val) +{ + __raw_writel(val, ar5312_rst_base + reg); +} + +static inline void ar5312_rst_reg_mask(u32 reg, u32 mask, u32 val) +{ + u32 ret = ar5312_rst_reg_read(reg); + + ret &= ~mask; + ret |= val; + ar5312_rst_reg_write(reg, ret); +} + +static void ar5312_restart(char *command) +{ + /* reset the system */ + local_irq_disable(); + while (1) + ar5312_rst_reg_write(AR5312_RESET, AR5312_RESET_SYSTEM); +} + +/* + * This table is indexed by bits 5..4 of the CLOCKCTL1 register + * to determine the predevisor value. + */ +static unsigned clockctl1_predivide_table[4] __initdata = { 1, 2, 4, 5 }; + +static unsigned __init ar5312_cpu_frequency(void) +{ + u32 scratch, devid, clock_ctl1; + u32 predivide_mask, multiplier_mask, doubler_mask; + unsigned predivide_shift, multiplier_shift; + unsigned predivide_select, predivisor, multiplier; + + /* Trust the bootrom's idea of cpu frequency. */ + scratch = ar5312_rst_reg_read(AR5312_SCRATCH); + if (scratch) + return scratch; + + devid = ar5312_rst_reg_read(AR5312_REV); + devid = (devid & AR5312_REV_MAJ) >> AR5312_REV_MAJ_S; + if (devid == AR5312_REV_MAJ_AR2313) { + predivide_mask = AR2313_CLOCKCTL1_PREDIVIDE_MASK; + predivide_shift = AR2313_CLOCKCTL1_PREDIVIDE_SHIFT; + multiplier_mask = AR2313_CLOCKCTL1_MULTIPLIER_MASK; + multiplier_shift = AR2313_CLOCKCTL1_MULTIPLIER_SHIFT; + doubler_mask = AR2313_CLOCKCTL1_DOUBLER_MASK; + } else { /* AR5312 and AR2312 */ + predivide_mask = AR5312_CLOCKCTL1_PREDIVIDE_MASK; + predivide_shift = AR5312_CLOCKCTL1_PREDIVIDE_SHIFT; + multiplier_mask = AR5312_CLOCKCTL1_MULTIPLIER_MASK; + multiplier_shift = AR5312_CLOCKCTL1_MULTIPLIER_SHIFT; + doubler_mask = AR5312_CLOCKCTL1_DOUBLER_MASK; + } + + /* + * Clocking is derived from a fixed 40MHz input clock. + * + * cpu_freq = input_clock * MULT (where MULT is PLL multiplier) + * sys_freq = cpu_freq / 4 (used for APB clock, serial, + * flash, Timer, Watchdog Timer) + * + * cnt_freq = cpu_freq / 2 (use for CPU count/compare) + * + * So, for example, with a PLL multiplier of 5, we have + * + * cpu_freq = 200MHz + * sys_freq = 50MHz + * cnt_freq = 100MHz + * + * We compute the CPU frequency, based on PLL settings. + */ + + clock_ctl1 = ar5312_rst_reg_read(AR5312_CLOCKCTL1); + predivide_select = (clock_ctl1 & predivide_mask) >> predivide_shift; + predivisor = clockctl1_predivide_table[predivide_select]; + multiplier = (clock_ctl1 & multiplier_mask) >> multiplier_shift; + + if (clock_ctl1 & doubler_mask) + multiplier <<= 1; + + return (40000000 / predivisor) * multiplier; +} + +static inline unsigned ar5312_sys_frequency(void) +{ + return ar5312_cpu_frequency() / 4; +} + +void __init ar5312_plat_time_init(void) +{ + mips_hpt_frequency = ar5312_cpu_frequency() / 2; +} + +void __init ar5312_plat_mem_setup(void) +{ + void __iomem *sdram_base; + u32 memsize, memcfg, bank0_ac, bank1_ac; + + /* Detect memory size */ + sdram_base = ioremap_nocache(AR5312_SDRAMCTL_BASE, + AR5312_SDRAMCTL_SIZE); + memcfg = __raw_readl(sdram_base + AR5312_MEM_CFG1); + bank0_ac = ATH25_REG_MS(memcfg, AR5312_MEM_CFG1_AC0); + bank1_ac = ATH25_REG_MS(memcfg, AR5312_MEM_CFG1_AC1); + memsize = (bank0_ac ? (1 << (bank0_ac + 1)) : 0) + + (bank1_ac ? (1 << (bank1_ac + 1)) : 0); + memsize <<= 20; + add_memory_region(0, memsize, BOOT_MEM_RAM); + iounmap(sdram_base); + + ar5312_rst_base = ioremap_nocache(AR5312_RST_BASE, AR5312_RST_SIZE); + + /* Clear any lingering AHB errors */ + ar5312_rst_reg_read(AR5312_PROCADDR); + ar5312_rst_reg_read(AR5312_DMAADDR); + ar5312_rst_reg_write(AR5312_WDT_CTRL, AR5312_WDT_CTRL_IGNORE); + + _machine_restart = ar5312_restart; +} diff --git a/arch/mips/ath25/ar5312.h b/arch/mips/ath25/ar5312.h new file mode 100644 index 000000000000..9e1e56e24eed --- /dev/null +++ b/arch/mips/ath25/ar5312.h @@ -0,0 +1,16 @@ +#ifndef __AR5312_H +#define __AR5312_H + +#ifdef CONFIG_SOC_AR5312 + +void ar5312_plat_time_init(void); +void ar5312_plat_mem_setup(void); + +#else + +static inline void ar5312_plat_time_init(void) {} +static inline void ar5312_plat_mem_setup(void) {} + +#endif + +#endif /* __AR5312_H */ diff --git a/arch/mips/ath25/ar5312_regs.h b/arch/mips/ath25/ar5312_regs.h new file mode 100644 index 000000000000..ff1201119be0 --- /dev/null +++ b/arch/mips/ath25/ar5312_regs.h @@ -0,0 +1,201 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +#ifndef __ASM_MACH_ATH25_AR5312_REGS_H +#define __ASM_MACH_ATH25_AR5312_REGS_H + +/* + * Address Map + * + * The AR5312 supports 2 enet MACS, even though many reference boards only + * actually use 1 of them (i.e. Only MAC 0 is actually connected to an enet + * PHY or PHY switch. The AR2312 supports 1 enet MAC. + */ +#define AR5312_WLAN0_BASE 0x18000000 +#define AR5312_ENET0_BASE 0x18100000 +#define AR5312_ENET1_BASE 0x18200000 +#define AR5312_SDRAMCTL_BASE 0x18300000 +#define AR5312_SDRAMCTL_SIZE 0x00000010 +#define AR5312_FLASHCTL_BASE 0x18400000 +#define AR5312_FLASHCTL_SIZE 0x00000010 +#define AR5312_WLAN1_BASE 0x18500000 +#define AR5312_UART0_BASE 0x1c000000 /* UART MMR */ +#define AR5312_GPIO_BASE 0x1c002000 +#define AR5312_GPIO_SIZE 0x00000010 +#define AR5312_RST_BASE 0x1c003000 +#define AR5312_RST_SIZE 0x00000100 +#define AR5312_FLASH_BASE 0x1e000000 +#define AR5312_FLASH_SIZE 0x00800000 + +/* + * Need these defines to determine true number of ethernet MACs + */ +#define AR5312_AR5312_REV2 0x0052 /* AR5312 WMAC (AP31) */ +#define AR5312_AR5312_REV7 0x0057 /* AR5312 WMAC (AP30-040) */ +#define AR5312_AR2313_REV8 0x0058 /* AR2313 WMAC (AP43-030) */ + +/* Reset/Timer Block Address Map */ +#define AR5312_TIMER 0x0000 /* countdown timer */ +#define AR5312_RELOAD 0x0004 /* timer reload value */ +#define AR5312_WDT_CTRL 0x0008 /* watchdog cntrl */ +#define AR5312_WDT_TIMER 0x000c /* watchdog timer */ +#define AR5312_ISR 0x0010 /* Intr Status Reg */ +#define AR5312_IMR 0x0014 /* Intr Mask Reg */ +#define AR5312_RESET 0x0020 +#define AR5312_CLOCKCTL1 0x0064 +#define AR5312_SCRATCH 0x006c +#define AR5312_PROCADDR 0x0070 +#define AR5312_PROC1 0x0074 +#define AR5312_DMAADDR 0x0078 +#define AR5312_DMA1 0x007c +#define AR5312_ENABLE 0x0080 /* interface enb */ +#define AR5312_REV 0x0090 /* revision */ + +/* AR5312_WDT_CTRL register bit field definitions */ +#define AR5312_WDT_CTRL_IGNORE 0x00000000 /* ignore expiration */ +#define AR5312_WDT_CTRL_NMI 0x00000001 +#define AR5312_WDT_CTRL_RESET 0x00000002 + +/* AR5312_ISR register bit field definitions */ +#define AR5312_ISR_TIMER 0x00000001 +#define AR5312_ISR_AHBPROC 0x00000002 +#define AR5312_ISR_AHBDMA 0x00000004 +#define AR5312_ISR_GPIO 0x00000008 +#define AR5312_ISR_UART0 0x00000010 +#define AR5312_ISR_UART0DMA 0x00000020 +#define AR5312_ISR_WD 0x00000040 +#define AR5312_ISR_LOCAL 0x00000080 + +/* AR5312_RESET register bit field definitions */ +#define AR5312_RESET_SYSTEM 0x00000001 /* cold reset full system */ +#define AR5312_RESET_PROC 0x00000002 /* cold reset MIPS core */ +#define AR5312_RESET_WLAN0 0x00000004 /* cold reset WLAN MAC/BB */ +#define AR5312_RESET_EPHY0 0x00000008 /* cold reset ENET0 phy */ +#define AR5312_RESET_EPHY1 0x00000010 /* cold reset ENET1 phy */ +#define AR5312_RESET_ENET0 0x00000020 /* cold reset ENET0 MAC */ +#define AR5312_RESET_ENET1 0x00000040 /* cold reset ENET1 MAC */ +#define AR5312_RESET_UART0 0x00000100 /* cold reset UART0 */ +#define AR5312_RESET_WLAN1 0x00000200 /* cold reset WLAN MAC/BB */ +#define AR5312_RESET_APB 0x00000400 /* cold reset APB ar5312 */ +#define AR5312_RESET_WARM_PROC 0x00001000 /* warm reset MIPS core */ +#define AR5312_RESET_WARM_WLAN0_MAC 0x00002000 /* warm reset WLAN0 MAC */ +#define AR5312_RESET_WARM_WLAN0_BB 0x00004000 /* warm reset WLAN0 BB */ +#define AR5312_RESET_NMI 0x00010000 /* send an NMI to the CPU */ +#define AR5312_RESET_WARM_WLAN1_MAC 0x00020000 /* warm reset WLAN1 MAC */ +#define AR5312_RESET_WARM_WLAN1_BB 0x00040000 /* warm reset WLAN1 BB */ +#define AR5312_RESET_LOCAL_BUS 0x00080000 /* reset local bus */ +#define AR5312_RESET_WDOG 0x00100000 /* last reset was a wdt */ + +#define AR5312_RESET_WMAC0_BITS (AR5312_RESET_WLAN0 |\ + AR5312_RESET_WARM_WLAN0_MAC |\ + AR5312_RESET_WARM_WLAN0_BB) + +#define AR5312_RESET_WMAC1_BITS (AR5312_RESET_WLAN1 |\ + AR5312_RESET_WARM_WLAN1_MAC |\ + AR5312_RESET_WARM_WLAN1_BB) + +/* AR5312_CLOCKCTL1 register bit field definitions */ +#define AR5312_CLOCKCTL1_PREDIVIDE_MASK 0x00000030 +#define AR5312_CLOCKCTL1_PREDIVIDE_SHIFT 4 +#define AR5312_CLOCKCTL1_MULTIPLIER_MASK 0x00001f00 +#define AR5312_CLOCKCTL1_MULTIPLIER_SHIFT 8 +#define AR5312_CLOCKCTL1_DOUBLER_MASK 0x00010000 + +/* Valid for AR5312 and AR2312 */ +#define AR5312_CLOCKCTL1_PREDIVIDE_MASK 0x00000030 +#define AR5312_CLOCKCTL1_PREDIVIDE_SHIFT 4 +#define AR5312_CLOCKCTL1_MULTIPLIER_MASK 0x00001f00 +#define AR5312_CLOCKCTL1_MULTIPLIER_SHIFT 8 +#define AR5312_CLOCKCTL1_DOUBLER_MASK 0x00010000 + +/* Valid for AR2313 */ +#define AR2313_CLOCKCTL1_PREDIVIDE_MASK 0x00003000 +#define AR2313_CLOCKCTL1_PREDIVIDE_SHIFT 12 +#define AR2313_CLOCKCTL1_MULTIPLIER_MASK 0x001f0000 +#define AR2313_CLOCKCTL1_MULTIPLIER_SHIFT 16 +#define AR2313_CLOCKCTL1_DOUBLER_MASK 0x00000000 + +/* AR5312_ENABLE register bit field definitions */ +#define AR5312_ENABLE_WLAN0 0x00000001 +#define AR5312_ENABLE_ENET0 0x00000002 +#define AR5312_ENABLE_ENET1 0x00000004 +#define AR5312_ENABLE_UART_AND_WLAN1_PIO 0x00000008/* UART & WLAN1 PIO */ +#define AR5312_ENABLE_WLAN1_DMA 0x00000010/* WLAN1 DMAs */ +#define AR5312_ENABLE_WLAN1 (AR5312_ENABLE_UART_AND_WLAN1_PIO |\ + AR5312_ENABLE_WLAN1_DMA) + +/* AR5312_REV register bit field definitions */ +#define AR5312_REV_WMAC_MAJ 0x0000f000 +#define AR5312_REV_WMAC_MAJ_S 12 +#define AR5312_REV_WMAC_MIN 0x00000f00 +#define AR5312_REV_WMAC_MIN_S 8 +#define AR5312_REV_MAJ 0x000000f0 +#define AR5312_REV_MAJ_S 4 +#define AR5312_REV_MIN 0x0000000f +#define AR5312_REV_MIN_S 0 +#define AR5312_REV_CHIP (AR5312_REV_MAJ|AR5312_REV_MIN) + +/* Major revision numbers, bits 7..4 of Revision ID register */ +#define AR5312_REV_MAJ_AR5312 0x4 +#define AR5312_REV_MAJ_AR2313 0x5 + +/* Minor revision numbers, bits 3..0 of Revision ID register */ +#define AR5312_REV_MIN_DUAL 0x0 /* Dual WLAN version */ +#define AR5312_REV_MIN_SINGLE 0x1 /* Single WLAN version */ + +/* + * ARM Flash Controller -- 3 flash banks with either x8 or x16 devices + */ +#define AR5312_FLASHCTL0 0x0000 +#define AR5312_FLASHCTL1 0x0004 +#define AR5312_FLASHCTL2 0x0008 + +/* AR5312_FLASHCTL register bit field definitions */ +#define AR5312_FLASHCTL_IDCY 0x0000000f /* Idle cycle turnaround time */ +#define AR5312_FLASHCTL_IDCY_S 0 +#define AR5312_FLASHCTL_WST1 0x000003e0 /* Wait state 1 */ +#define AR5312_FLASHCTL_WST1_S 5 +#define AR5312_FLASHCTL_RBLE 0x00000400 /* Read byte lane enable */ +#define AR5312_FLASHCTL_WST2 0x0000f800 /* Wait state 2 */ +#define AR5312_FLASHCTL_WST2_S 11 +#define AR5312_FLASHCTL_AC 0x00070000 /* Flash addr check (added) */ +#define AR5312_FLASHCTL_AC_S 16 +#define AR5312_FLASHCTL_AC_128K 0x00000000 +#define AR5312_FLASHCTL_AC_256K 0x00010000 +#define AR5312_FLASHCTL_AC_512K 0x00020000 +#define AR5312_FLASHCTL_AC_1M 0x00030000 +#define AR5312_FLASHCTL_AC_2M 0x00040000 +#define AR5312_FLASHCTL_AC_4M 0x00050000 +#define AR5312_FLASHCTL_AC_8M 0x00060000 +#define AR5312_FLASHCTL_AC_RES 0x00070000 /* 16MB is not supported */ +#define AR5312_FLASHCTL_E 0x00080000 /* Flash bank enable (added) */ +#define AR5312_FLASHCTL_BUSERR 0x01000000 /* Bus transfer error flag */ +#define AR5312_FLASHCTL_WPERR 0x02000000 /* Write protect error flag */ +#define AR5312_FLASHCTL_WP 0x04000000 /* Write protect */ +#define AR5312_FLASHCTL_BM 0x08000000 /* Burst mode */ +#define AR5312_FLASHCTL_MW 0x30000000 /* Mem width */ +#define AR5312_FLASHCTL_MW8 0x00000000 /* Mem width x8 */ +#define AR5312_FLASHCTL_MW16 0x10000000 /* Mem width x16 */ +#define AR5312_FLASHCTL_MW32 0x20000000 /* Mem width x32 (not supp) */ +#define AR5312_FLASHCTL_ATNR 0x00000000 /* Access == no retry */ +#define AR5312_FLASHCTL_ATR 0x80000000 /* Access == retry every */ +#define AR5312_FLASHCTL_ATR4 0xc0000000 /* Access == retry every 4 */ + +/* + * ARM SDRAM Controller -- just enough to determine memory size + */ +#define AR5312_MEM_CFG1 0x0004 + +#define AR5312_MEM_CFG1_AC0_M 0x00000700 /* bank 0: SDRAM addr check */ +#define AR5312_MEM_CFG1_AC0_S 8 +#define AR5312_MEM_CFG1_AC1_M 0x00007000 /* bank 1: SDRAM addr check */ +#define AR5312_MEM_CFG1_AC1_S 12 + +#endif /* __ASM_MACH_ATH25_AR5312_REGS_H */ diff --git a/arch/mips/ath25/board.c b/arch/mips/ath25/board.c index dd70327fd801..03baeceb3e35 100644 --- a/arch/mips/ath25/board.c +++ b/arch/mips/ath25/board.c @@ -16,6 +16,9 @@ #include <asm/bootinfo.h> #include <asm/time.h> +#include "devices.h" +#include "ar5312.h" + static void ath25_halt(void) { local_irq_disable(); @@ -27,6 +30,9 @@ void __init plat_mem_setup(void) _machine_halt = ath25_halt; pm_power_off = ath25_halt; + if (is_ar5312()) + ar5312_plat_mem_setup(); + /* Disable data watchpoints */ write_c0_watchlo0(0); } @@ -37,6 +43,8 @@ asmlinkage void plat_irq_dispatch(void) void __init plat_time_init(void) { + if (is_ar5312()) + ar5312_plat_time_init(); } unsigned int __cpuinit get_c0_compare_int(void) |