upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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387 lines
11 KiB
387 lines
11 KiB
/*
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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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#include <common.h>
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#include <netdev.h>
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#include <asm/cache.h>
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#include <u-boot/md5.h>
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#include <asm/arch/kirkwood.h>
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#include <hush.h>
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#define BUFLEN 16
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void reset_cpu(unsigned long ignored)
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{
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struct kwcpu_registers *cpureg =
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(struct kwcpu_registers *)KW_CPU_REG_BASE;
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writel(readl(&cpureg->rstoutn_mask) | (1 << 2),
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&cpureg->rstoutn_mask);
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writel(readl(&cpureg->sys_soft_rst) | 1,
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&cpureg->sys_soft_rst);
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while (1) ;
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}
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/*
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* Generates Ramdom hex number reading some time varient system registers
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* and using md5 algorithm
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*/
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unsigned char get_random_hex(void)
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{
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int i;
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u32 inbuf[BUFLEN];
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u8 outbuf[BUFLEN];
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/*
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* in case of 88F6281/88F6192 A0,
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* Bit7 need to reset to generate random values in KW_REG_UNDOC_0x1470
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* Soc reg offsets KW_REG_UNDOC_0x1470 and KW_REG_UNDOC_0x1478 are reserved regs and
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* Does not have names at this moment (no errata available)
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*/
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writel(readl(KW_REG_UNDOC_0x1478) & ~(1 << 7), KW_REG_UNDOC_0x1478);
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for (i = 0; i < BUFLEN; i++) {
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inbuf[i] = readl(KW_REG_UNDOC_0x1470);
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}
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md5((u8 *) inbuf, (BUFLEN * sizeof(u32)), outbuf);
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return outbuf[outbuf[7] % 0x0f];
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}
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/*
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* Window Size
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* Used with the Base register to set the address window size and location.
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* Must be programmed from LSB to MSB as sequence of ones followed by
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* sequence of zeros. The number of ones specifies the size of the window in
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* 64 KByte granularity (e.g., a value of 0x00FF specifies 256 = 16 MByte).
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* NOTE: A value of 0x0 specifies 64-KByte size.
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*/
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unsigned int kw_winctrl_calcsize(unsigned int sizeval)
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{
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int i;
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unsigned int j = 0;
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u32 val = sizeval >> 1;
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for (i = 0; val > 0x10000; i++) {
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j |= (1 << i);
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val = val >> 1;
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}
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return (0x0000ffff & j);
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}
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/*
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* kw_config_adr_windows - Configure address Windows
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*
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* There are 8 address windows supported by Kirkwood Soc to addess different
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* devices. Each window can be configured for size, BAR and remap addr
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* Below configuration is standard for most of the cases
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*
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* If remap function not used, remap_lo must be set as base
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*
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* Reference Documentation:
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* Mbus-L to Mbus Bridge Registers Configuration.
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* (Sec 25.1 and 25.3 of Datasheet)
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*/
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int kw_config_adr_windows(void)
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{
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struct kwwin_registers *winregs =
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(struct kwwin_registers *)KW_CPU_WIN_BASE;
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/* Window 0: PCIE MEM address space */
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writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 256, KWCPU_TARGET_PCIE,
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KWCPU_ATTR_PCIE_MEM, KWCPU_WIN_ENABLE), &winregs[0].ctrl);
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writel(KW_DEFADR_PCI_MEM, &winregs[0].base);
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writel(KW_DEFADR_PCI_MEM, &winregs[0].remap_lo);
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writel(0x0, &winregs[0].remap_hi);
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/* Window 1: PCIE IO address space */
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writel(KWCPU_WIN_CTRL_DATA(1024 * 64, KWCPU_TARGET_PCIE,
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KWCPU_ATTR_PCIE_IO, KWCPU_WIN_ENABLE), &winregs[1].ctrl);
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writel(KW_DEFADR_PCI_IO, &winregs[1].base);
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writel(KW_DEFADR_PCI_IO_REMAP, &winregs[1].remap_lo);
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writel(0x0, &winregs[1].remap_hi);
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/* Window 2: NAND Flash address space */
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writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 128, KWCPU_TARGET_MEMORY,
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KWCPU_ATTR_NANDFLASH, KWCPU_WIN_ENABLE), &winregs[2].ctrl);
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writel(KW_DEFADR_NANDF, &winregs[2].base);
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writel(KW_DEFADR_NANDF, &winregs[2].remap_lo);
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writel(0x0, &winregs[2].remap_hi);
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/* Window 3: SPI Flash address space */
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writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 128, KWCPU_TARGET_MEMORY,
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KWCPU_ATTR_SPIFLASH, KWCPU_WIN_ENABLE), &winregs[3].ctrl);
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writel(KW_DEFADR_SPIF, &winregs[3].base);
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writel(KW_DEFADR_SPIF, &winregs[3].remap_lo);
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writel(0x0, &winregs[3].remap_hi);
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/* Window 4: BOOT Memory address space */
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writel(KWCPU_WIN_CTRL_DATA(1024 * 1024 * 128, KWCPU_TARGET_MEMORY,
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KWCPU_ATTR_BOOTROM, KWCPU_WIN_ENABLE), &winregs[4].ctrl);
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writel(KW_DEFADR_BOOTROM, &winregs[4].base);
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/* Window 5: Security SRAM address space */
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writel(KWCPU_WIN_CTRL_DATA(1024 * 64, KWCPU_TARGET_SASRAM,
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KWCPU_ATTR_SASRAM, KWCPU_WIN_ENABLE), &winregs[5].ctrl);
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writel(KW_DEFADR_SASRAM, &winregs[5].base);
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/* Window 6-7: Disabled */
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writel(KWCPU_WIN_DISABLE, &winregs[6].ctrl);
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writel(KWCPU_WIN_DISABLE, &winregs[7].ctrl);
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return 0;
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}
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/*
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* kw_config_gpio - GPIO configuration
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*/
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void kw_config_gpio(u32 gpp0_oe_val, u32 gpp1_oe_val, u32 gpp0_oe, u32 gpp1_oe)
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{
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struct kwgpio_registers *gpio0reg =
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(struct kwgpio_registers *)KW_GPIO0_BASE;
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struct kwgpio_registers *gpio1reg =
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(struct kwgpio_registers *)KW_GPIO1_BASE;
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/* Init GPIOS to default values as per board requirement */
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writel(gpp0_oe_val, &gpio0reg->dout);
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writel(gpp1_oe_val, &gpio1reg->dout);
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writel(gpp0_oe, &gpio0reg->oe);
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writel(gpp1_oe, &gpio1reg->oe);
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}
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/*
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* kw_config_mpp - Multi-Purpose Pins Functionality configuration
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*
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* Each MPP can be configured to different functionality through
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* MPP control register, ref (sec 6.1 of kirkwood h/w specification)
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*
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* There are maximum 64 Multi-Pourpose Pins on Kirkwood
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* Each MPP functionality can be configuration by a 4bit value
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* of MPP control reg, the value and associated functionality depends
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* upon used SoC varient
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*/
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int kw_config_mpp(u32 mpp0_7, u32 mpp8_15, u32 mpp16_23, u32 mpp24_31,
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u32 mpp32_39, u32 mpp40_47, u32 mpp48_55)
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{
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u32 *mppreg = (u32 *) KW_MPP_BASE;
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/* program mpp registers */
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writel(mpp0_7, &mppreg[0]);
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writel(mpp8_15, &mppreg[1]);
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writel(mpp16_23, &mppreg[2]);
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writel(mpp24_31, &mppreg[3]);
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writel(mpp32_39, &mppreg[4]);
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writel(mpp40_47, &mppreg[5]);
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writel(mpp48_55, &mppreg[6]);
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return 0;
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}
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/*
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* SYSRSTn Duration Counter Support
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*
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* Kirkwood SoC implements a hardware-based SYSRSTn duration counter.
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* When SYSRSTn is asserted low, a SYSRSTn duration counter is running.
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* The SYSRSTn duration counter is useful for implementing a manufacturer
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* or factory reset. Upon a long reset assertion that is greater than a
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* pre-configured environment variable value for sysrstdelay,
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* The counter value is stored in the SYSRSTn Length Counter Register
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* The counter is based on the 25-MHz reference clock (40ns)
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* It is a 29-bit counter, yielding a maximum counting duration of
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* 2^29/25 MHz (21.4 seconds). When the counter reach its maximum value,
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* it remains at this value until counter reset is triggered by setting
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* bit 31 of KW_REG_SYSRST_CNT
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*/
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static void kw_sysrst_action(void)
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{
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int ret;
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char *s = getenv("sysrstcmd");
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if (!s) {
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debug("Error.. %s failed, check sysrstcmd\n",
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__FUNCTION__);
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return;
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}
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debug("Starting %s process...\n", __FUNCTION__);
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#if !defined(CONFIG_SYS_HUSH_PARSER)
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ret = run_command (s, 0);
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#else
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ret = parse_string_outer(s, FLAG_PARSE_SEMICOLON
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| FLAG_EXIT_FROM_LOOP);
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#endif
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if (ret < 0)
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debug("Error.. %s failed\n", __FUNCTION__);
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else
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debug("%s process finished\n", __FUNCTION__);
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}
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static void kw_sysrst_check(void)
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{
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u32 sysrst_cnt, sysrst_dly;
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char *s;
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/*
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* no action if sysrstdelay environment variable is not defined
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*/
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s = getenv("sysrstdelay");
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if (s == NULL)
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return;
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/* read sysrstdelay value */
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sysrst_dly = (u32) simple_strtoul(s, NULL, 10);
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/* read SysRst Length counter register (bits 28:0) */
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sysrst_cnt = (0x1fffffff & readl(KW_REG_SYSRST_CNT));
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debug("H/w Rst hold time: %d.%d secs\n",
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sysrst_cnt / SYSRST_CNT_1SEC_VAL,
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sysrst_cnt % SYSRST_CNT_1SEC_VAL);
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/* clear the counter for next valid read*/
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writel(1 << 31, KW_REG_SYSRST_CNT);
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/*
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* sysrst_action:
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* if H/w Reset key is pressed and hold for time
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* more than sysrst_dly in seconds
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*/
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if (sysrst_cnt >= SYSRST_CNT_1SEC_VAL * sysrst_dly)
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kw_sysrst_action();
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}
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#if defined(CONFIG_DISPLAY_CPUINFO)
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int print_cpuinfo(void)
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{
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char *name = "Unknown";
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switch (readl(KW_REG_DEVICE_ID) & 0x03) {
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case 1:
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name = "88F6192_A0";
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break;
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case 2:
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name = "88F6281_A0";
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break;
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default:
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printf("SoC: Unsupported Kirkwood\n");
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return -1;
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}
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printf("SoC: Kirkwood %s\n", name);
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return 0;
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}
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#endif /* CONFIG_DISPLAY_CPUINFO */
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#ifdef CONFIG_ARCH_CPU_INIT
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int arch_cpu_init(void)
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{
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u32 reg;
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struct kwcpu_registers *cpureg =
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(struct kwcpu_registers *)KW_CPU_REG_BASE;
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/* Linux expects` the internal registers to be at 0xf1000000 */
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writel(KW_REGS_PHY_BASE, KW_OFFSET_REG);
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/* Enable and invalidate L2 cache in write through mode */
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writel(readl(&cpureg->l2_cfg) | 0x18, &cpureg->l2_cfg);
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invalidate_l2_cache();
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kw_config_adr_windows();
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#ifdef CONFIG_KIRKWOOD_RGMII_PAD_1V8
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/*
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* Configures the I/O voltage of the pads connected to Egigabit
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* Ethernet interface to 1.8V
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* By defult it is set to 3.3V
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*/
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reg = readl(KW_REG_MPP_OUT_DRV_REG);
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reg |= (1 << 7);
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writel(reg, KW_REG_MPP_OUT_DRV_REG);
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#endif
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#ifdef CONFIG_KIRKWOOD_EGIGA_INIT
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/*
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* Set egiga port0/1 in normal functional mode
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* This is required becasue on kirkwood by default ports are in reset mode
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* OS egiga driver may not have provision to set them in normal mode
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* and if u-boot is build without network support, network may fail at OS level
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*/
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reg = readl(KWGBE_PORT_SERIAL_CONTROL1_REG(0));
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reg &= ~(1 << 4); /* Clear PortReset Bit */
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writel(reg, (KWGBE_PORT_SERIAL_CONTROL1_REG(0)));
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reg = readl(KWGBE_PORT_SERIAL_CONTROL1_REG(1));
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reg &= ~(1 << 4); /* Clear PortReset Bit */
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writel(reg, (KWGBE_PORT_SERIAL_CONTROL1_REG(1)));
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#endif
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#ifdef CONFIG_KIRKWOOD_PCIE_INIT
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/*
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* Enable PCI Express Port0
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*/
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reg = readl(&cpureg->ctrl_stat);
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reg |= (1 << 0); /* Set PEX0En Bit */
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writel(reg, &cpureg->ctrl_stat);
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#endif
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return 0;
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}
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#endif /* CONFIG_ARCH_CPU_INIT */
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/*
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* SOC specific misc init
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*/
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#if defined(CONFIG_ARCH_MISC_INIT)
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int arch_misc_init(void)
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{
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volatile u32 temp;
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/*CPU streaming & write allocate */
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temp = readfr_extra_feature_reg();
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temp &= ~(1 << 28); /* disable wr alloc */
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writefr_extra_feature_reg(temp);
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temp = readfr_extra_feature_reg();
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temp &= ~(1 << 29); /* streaming disabled */
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writefr_extra_feature_reg(temp);
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/* L2Cache settings */
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temp = readfr_extra_feature_reg();
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/* Disable L2C pre fetch - Set bit 24 */
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temp |= (1 << 24);
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/* enable L2C - Set bit 22 */
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temp |= (1 << 22);
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writefr_extra_feature_reg(temp);
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icache_enable();
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/* Change reset vector to address 0x0 */
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temp = get_cr();
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set_cr(temp & ~CR_V);
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/* checks and execute resset to factory event */
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kw_sysrst_check();
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return 0;
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}
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#endif /* CONFIG_ARCH_MISC_INIT */
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#ifdef CONFIG_KIRKWOOD_EGIGA
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int cpu_eth_init(bd_t *bis)
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{
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kirkwood_egiga_initialize(bis);
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return 0;
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}
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#endif
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