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This feature can be used to trigger special command "sysrstcmd" using
reset key long press event and environment variable "sysrstdelay" is set
(useful for reset to factory or manufacturing mode execution)
Kirkwood SoC implements a hardware-based SYSRSTn duration counter.
When SYSRSTn is asserted low, a SYSRSTn duration counter is running.
The counter value is stored in the SYSRSTn Length Counter Register
The counter is based on the 25-MHz reference clock (40ns)
It is a 29-bit counter, yielding a maximum counting duration of
2^29/25 MHz (21.4 seconds). When the counter reach its maximum value,
it remains at this value until counter reset is triggered by setting
bit 31 of KW_REG_SYSRST_CNT
Implementation:
Upon long reset assertion (> ${sysrstdelay} in secs) sysrstcmd will be
executed if pre-defined in environment variables.
This feature will be disabled if "sysrstdelay" variable is unset.
for-ex.
setenv sysrst_cmd "echo starting factory reset;
nand erase 0xa0000 0x20000;
echo finish ed sysrst command;"
will erase particular nand sector if triggered by this event
Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
169 lines
4.1 KiB
C
169 lines
4.1 KiB
C
/*
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* (C) Copyright 2009
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* Marvell Semiconductor <www.marvell.com>
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* Written-by: Prafulla Wadaskar <prafulla@marvell.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#ifndef _KWCPU_H
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#define _KWCPU_H
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#include <asm/system.h>
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#ifndef __ASSEMBLY__
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#define KWCPU_WIN_CTRL_DATA(size, target, attr, en) (en | (target << 4) \
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| (attr << 8) | (kw_winctrl_calcsize(size) << 16))
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#define KWGBE_PORT_SERIAL_CONTROL1_REG(_x) \
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((_x ? KW_EGIGA0_BASE : KW_EGIGA1_BASE) + 0x44c)
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#define KW_REG_DEVICE_ID (KW_MPP_BASE + 0x34)
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#define KW_REG_SYSRST_CNT (KW_MPP_BASE + 0x50)
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#define SYSRST_CNT_1SEC_VAL (25*1000000)
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#define KW_REG_MPP_OUT_DRV_REG (KW_MPP_BASE + 0xE0)
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enum memory_bank {
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BANK0,
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BANK1,
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BANK2,
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BANK3
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};
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enum kwcpu_winen {
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KWCPU_WIN_DISABLE,
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KWCPU_WIN_ENABLE
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};
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enum kwcpu_target {
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KWCPU_TARGET_RESERVED,
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KWCPU_TARGET_MEMORY,
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KWCPU_TARGET_1RESERVED,
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KWCPU_TARGET_SASRAM,
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KWCPU_TARGET_PCIE
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};
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enum kwcpu_attrib {
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KWCPU_ATTR_SASRAM = 0x01,
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KWCPU_ATTR_DRAM_CS0 = 0x0e,
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KWCPU_ATTR_DRAM_CS1 = 0x0d,
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KWCPU_ATTR_DRAM_CS2 = 0x0b,
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KWCPU_ATTR_DRAM_CS3 = 0x07,
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KWCPU_ATTR_NANDFLASH = 0x2f,
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KWCPU_ATTR_SPIFLASH = 0x1e,
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KWCPU_ATTR_BOOTROM = 0x1d,
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KWCPU_ATTR_PCIE_IO = 0xe0,
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KWCPU_ATTR_PCIE_MEM = 0xe8
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};
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/*
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* Default Device Address MAP BAR values
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*/
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#define KW_DEFADR_PCI_MEM 0x90000000
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#define KW_DEFADR_PCI_IO 0xC0000000
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#define KW_DEFADR_PCI_IO_REMAP 0xC0000000
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#define KW_DEFADR_SASRAM 0xC8010000
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#define KW_DEFADR_NANDF 0xD8000000
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#define KW_DEFADR_SPIF 0xE8000000
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#define KW_DEFADR_BOOTROM 0xF8000000
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/*
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* read feroceon/sheeva core extra feature register
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* using co-proc instruction
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*/
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static inline unsigned int readfr_extra_feature_reg(void)
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{
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unsigned int val;
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asm volatile ("mrc p15, 1, %0, c15, c1, 0 @ readfr exfr":"=r"
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(val)::"cc");
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return val;
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}
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/*
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* write feroceon/sheeva core extra feature register
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* using co-proc instruction
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*/
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static inline void writefr_extra_feature_reg(unsigned int val)
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{
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asm volatile ("mcr p15, 1, %0, c15, c1, 0 @ writefr exfr"::"r"
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(val):"cc");
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isb();
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}
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/*
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* MBus-L to Mbus Bridge Registers
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* Ref: Datasheet sec:A.3
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*/
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struct kwwin_registers {
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u32 ctrl;
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u32 base;
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u32 remap_lo;
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u32 remap_hi;
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};
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/*
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* CPU control and status Registers
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* Ref: Datasheet sec:A.3.2
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*/
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struct kwcpu_registers {
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u32 config; /*0x20100 */
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u32 ctrl_stat; /*0x20104 */
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u32 rstoutn_mask; /* 0x20108 */
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u32 sys_soft_rst; /* 0x2010C */
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u32 ahb_mbus_cause_irq; /* 0x20110 */
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u32 ahb_mbus_mask_irq; /* 0x20114 */
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u32 pad1[2];
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u32 ftdll_config; /* 0x20120 */
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u32 pad2;
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u32 l2_cfg; /* 0x20128 */
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};
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/*
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* GPIO Registers
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* Ref: Datasheet sec:A.19
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*/
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struct kwgpio_registers {
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u32 dout;
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u32 oe;
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u32 blink_en;
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u32 din_pol;
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u32 din;
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u32 irq_cause;
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u32 irq_mask;
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u32 irq_level;
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};
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/*
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* functions
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*/
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void reset_cpu(unsigned long ignored);
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unsigned char get_random_hex(void);
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unsigned int kw_sdram_bar(enum memory_bank bank);
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unsigned int kw_sdram_bs(enum memory_bank bank);
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int kw_config_adr_windows(void);
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void kw_config_gpio(unsigned int gpp0_oe_val, unsigned int gpp1_oe_val,
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unsigned int gpp0_oe, unsigned int gpp1_oe);
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int kw_config_mpp(unsigned int mpp0_7, unsigned int mpp8_15,
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unsigned int mpp16_23, unsigned int mpp24_31,
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unsigned int mpp32_39, unsigned int mpp40_47,
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unsigned int mpp48_55);
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unsigned int kw_winctrl_calcsize(unsigned int sizeval);
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#endif /* __ASSEMBLY__ */
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#endif /* _KWCPU_H */
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