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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518 lines
12 KiB
518 lines
12 KiB
/*
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* (C) Copyright 2009
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* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.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., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <flash.h>
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#include <linux/err.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/spr_smi.h>
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#if !defined(CONFIG_SYS_NO_FLASH)
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static struct smi_regs *const smicntl =
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(struct smi_regs * const)CONFIG_SYS_SMI_BASE;
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static ulong bank_base[CONFIG_SYS_MAX_FLASH_BANKS] =
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CONFIG_SYS_FLASH_ADDR_BASE;
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flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
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#define ST_M25Pxx_ID 0x00002020
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static struct flash_dev flash_ids[] = {
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{0x10, 0x10000, 2}, /* 64K Byte */
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{0x11, 0x20000, 4}, /* 128K Byte */
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{0x12, 0x40000, 4}, /* 256K Byte */
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{0x13, 0x80000, 8}, /* 512K Byte */
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{0x14, 0x100000, 16}, /* 1M Byte */
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{0x15, 0x200000, 32}, /* 2M Byte */
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{0x16, 0x400000, 64}, /* 4M Byte */
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{0x17, 0x800000, 128}, /* 8M Byte */
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{0x18, 0x1000000, 64}, /* 16M Byte */
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{0x00,}
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};
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/*
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* smi_wait_xfer_finish - Wait until TFF is set in status register
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* @timeout: timeout in milliseconds
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*
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* Wait until TFF is set in status register
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*/
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static void smi_wait_xfer_finish(int timeout)
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{
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while (timeout--) {
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if (readl(&smicntl->smi_sr) & TFF)
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break;
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udelay(1000);
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}
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}
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/*
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* smi_read_id - Read flash id
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* @info: flash_info structure pointer
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* @banknum: bank number
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*
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* Read the flash id present at bank #banknum
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*/
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static unsigned int smi_read_id(flash_info_t *info, int banknum)
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{
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unsigned int value;
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writel(readl(&smicntl->smi_cr1) | SW_MODE, &smicntl->smi_cr1);
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writel(READ_ID, &smicntl->smi_tr);
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writel((banknum << BANKSEL_SHIFT) | SEND | TX_LEN_1 | RX_LEN_3,
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&smicntl->smi_cr2);
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smi_wait_xfer_finish(XFER_FINISH_TOUT);
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value = (readl(&smicntl->smi_rr) & 0x00FFFFFF);
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writel(readl(&smicntl->smi_sr) & ~TFF, &smicntl->smi_sr);
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writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);
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return value;
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}
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/*
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* flash_get_size - Detect the SMI flash by reading the ID.
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* @base: Base address of the flash area bank #banknum
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* @banknum: Bank number
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*
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* Detect the SMI flash by reading the ID. Initializes the flash_info structure
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* with size, sector count etc.
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*/
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static ulong flash_get_size(ulong base, int banknum)
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{
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flash_info_t *info = &flash_info[banknum];
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struct flash_dev *dev;
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unsigned int value;
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unsigned int density;
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int i;
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value = smi_read_id(info, banknum);
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density = (value >> 16) & 0xff;
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for (i = 0, dev = &flash_ids[0]; dev->density != 0x0;
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i++, dev = &flash_ids[i]) {
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if (dev->density == density) {
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info->size = dev->size;
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info->sector_count = dev->sector_count;
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break;
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}
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}
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if (dev->density == 0x0)
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return 0;
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info->flash_id = value & 0xffff;
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info->start[0] = base;
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return info->size;
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}
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/*
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* smi_read_sr - Read status register of SMI
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* @bank: bank number
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*
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* This routine will get the status register of the flash chip present at the
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* given bank
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*/
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static unsigned int smi_read_sr(int bank)
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{
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u32 ctrlreg1;
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/* store the CTRL REG1 state */
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ctrlreg1 = readl(&smicntl->smi_cr1);
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/* Program SMI in HW Mode */
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writel(readl(&smicntl->smi_cr1) & ~(SW_MODE | WB_MODE),
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&smicntl->smi_cr1);
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/* Performing a RSR instruction in HW mode */
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writel((bank << BANKSEL_SHIFT) | RD_STATUS_REG, &smicntl->smi_cr2);
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smi_wait_xfer_finish(XFER_FINISH_TOUT);
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/* Restore the CTRL REG1 state */
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writel(ctrlreg1, &smicntl->smi_cr1);
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return readl(&smicntl->smi_sr);
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}
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/*
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* smi_wait_till_ready - Wait till last operation is over.
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* @bank: bank number shifted.
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* @timeout: timeout in milliseconds.
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*
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* This routine checks for WIP(write in progress)bit in Status register(SMSR-b0)
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* The routine checks for #timeout loops, each at interval of 1 milli-second.
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* If successful the routine returns 0.
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*/
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static int smi_wait_till_ready(int bank, int timeout)
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{
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int count;
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unsigned int sr;
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/* One chip guarantees max 5 msec wait here after page writes,
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but potentially three seconds (!) after page erase. */
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for (count = 0; count < timeout; count++) {
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sr = smi_read_sr(bank);
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if (sr < 0)
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break;
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else if (!(sr & WIP_BIT))
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return 0;
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/* Try again after 1m-sec */
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udelay(1000);
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}
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printf("SMI controller is still in wait, timeout=%d\n", timeout);
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return -EIO;
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}
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/*
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* smi_write_enable - Enable the flash to do write operation
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* @bank: bank number
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*
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* Set write enable latch with Write Enable command.
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* Returns negative if error occurred.
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*/
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static int smi_write_enable(int bank)
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{
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u32 ctrlreg1;
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int timeout = WMODE_TOUT;
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/* Store the CTRL REG1 state */
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ctrlreg1 = readl(&smicntl->smi_cr1);
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/* Program SMI in H/W Mode */
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writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);
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/* Give the Flash, Write Enable command */
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writel((bank << BANKSEL_SHIFT) | WE, &smicntl->smi_cr2);
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smi_wait_xfer_finish(XFER_FINISH_TOUT);
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/* Restore the CTRL REG1 state */
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writel(ctrlreg1, &smicntl->smi_cr1);
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while (timeout--) {
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if (smi_read_sr(bank) & (1 << (bank + WM_SHIFT)))
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break;
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udelay(1000);
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}
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if (timeout)
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return 0;
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return -1;
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}
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/*
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* smi_init - SMI initialization routine
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*
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* SMI initialization routine. Sets SMI control register1.
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*/
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static void smi_init(void)
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{
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/* Setting the fast mode values. SMI working at 166/4 = 41.5 MHz */
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writel(HOLD1 | FAST_MODE | BANK_EN | DSEL_TIME | PRESCAL4,
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&smicntl->smi_cr1);
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}
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/*
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* smi_sector_erase - Erase flash sector
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* @info: flash_info structure pointer
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* @sector: sector number
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*
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* Set write enable latch with Write Enable command.
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* Returns negative if error occurred.
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*/
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static int smi_sector_erase(flash_info_t *info, unsigned int sector)
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{
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int bank;
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unsigned int sect_add;
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unsigned int instruction;
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switch (info->start[0]) {
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case SMIBANK0_BASE:
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bank = BANK0;
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break;
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case SMIBANK1_BASE:
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bank = BANK1;
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break;
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case SMIBANK2_BASE:
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bank = BANK2;
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break;
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case SMIBANK3_BASE:
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bank = BANK3;
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break;
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default:
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return -1;
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}
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sect_add = sector * (info->size / info->sector_count);
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instruction = ((sect_add >> 8) & 0x0000FF00) | SECTOR_ERASE;
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writel(readl(&smicntl->smi_sr) & ~(ERF1 | ERF2), &smicntl->smi_sr);
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if (info->flash_id == ST_M25Pxx_ID) {
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/* Wait until finished previous write command. */
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if (smi_wait_till_ready(bank, CONFIG_SYS_FLASH_ERASE_TOUT))
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return -EBUSY;
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/* Send write enable, before erase commands. */
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if (smi_write_enable(bank))
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return -EIO;
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/* Put SMI in SW mode */
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writel(readl(&smicntl->smi_cr1) | SW_MODE, &smicntl->smi_cr1);
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/* Send Sector Erase command in SW Mode */
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writel(instruction, &smicntl->smi_tr);
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writel((bank << BANKSEL_SHIFT) | SEND | TX_LEN_4,
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&smicntl->smi_cr2);
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smi_wait_xfer_finish(XFER_FINISH_TOUT);
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if (smi_wait_till_ready(bank, CONFIG_SYS_FLASH_ERASE_TOUT))
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return -EBUSY;
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/* Put SMI in HW mode */
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writel(readl(&smicntl->smi_cr1) & ~SW_MODE,
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&smicntl->smi_cr1);
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return 0;
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} else {
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/* Put SMI in HW mode */
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writel(readl(&smicntl->smi_cr1) & ~SW_MODE,
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&smicntl->smi_cr1);
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return -EINVAL;
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}
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}
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/*
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* smi_write - Write to SMI flash
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* @src_addr: source buffer
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* @dst_addr: destination buffer
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* @length: length to write in words
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* @bank: bank base address
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*
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* Write to SMI flash
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*/
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static int smi_write(unsigned int *src_addr, unsigned int *dst_addr,
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unsigned int length, ulong bank_addr)
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{
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int banknum;
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switch (bank_addr) {
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case SMIBANK0_BASE:
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banknum = BANK0;
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break;
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case SMIBANK1_BASE:
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banknum = BANK1;
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break;
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case SMIBANK2_BASE:
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banknum = BANK2;
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break;
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case SMIBANK3_BASE:
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banknum = BANK3;
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break;
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default:
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return -1;
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}
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if (smi_wait_till_ready(banknum, CONFIG_SYS_FLASH_WRITE_TOUT))
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return -EBUSY;
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/* Set SMI in Hardware Mode */
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writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);
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if (smi_write_enable(banknum))
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return -EIO;
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/* Perform the write command */
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while (length--) {
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if (((ulong) (dst_addr) % SFLASH_PAGE_SIZE) == 0) {
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if (smi_wait_till_ready(banknum,
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CONFIG_SYS_FLASH_WRITE_TOUT))
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return -EBUSY;
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if (smi_write_enable(banknum))
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return -EIO;
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}
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*dst_addr++ = *src_addr++;
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if ((readl(&smicntl->smi_sr) & (ERF1 | ERF2)))
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return -EIO;
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}
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if (smi_wait_till_ready(banknum, CONFIG_SYS_FLASH_WRITE_TOUT))
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return -EBUSY;
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writel(readl(&smicntl->smi_sr) & ~(WCF), &smicntl->smi_sr);
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return 0;
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}
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/*
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* write_buff - Write to SMI flash
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* @info: flash info structure
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* @src: source buffer
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* @dest_addr: destination buffer
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* @length: length to write in words
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*
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* Write to SMI flash
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*/
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int write_buff(flash_info_t *info, uchar *src, ulong dest_addr, ulong length)
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{
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return smi_write((unsigned int *)src, (unsigned int *)dest_addr,
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(length + 3) / 4, info->start[0]);
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}
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/*
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* flash_init - SMI flash initialization
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*
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* SMI flash initialization
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*/
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unsigned long flash_init(void)
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{
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unsigned long size = 0;
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int i, j;
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smi_init();
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for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
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flash_info[i].flash_id = FLASH_UNKNOWN;
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size += flash_info[i].size = flash_get_size(bank_base[i], i);
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}
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for (j = 0; j < CONFIG_SYS_MAX_FLASH_BANKS; j++) {
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for (i = 1; i < flash_info[j].sector_count; i++)
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flash_info[j].start[i] =
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flash_info[j].start[i - 1] +
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flash_info->size / flash_info->sector_count;
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}
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return size;
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}
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/*
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* flash_print_info - Print SMI flash information
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*
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* Print SMI flash information
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*/
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void flash_print_info(flash_info_t *info)
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{
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int i;
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if (info->flash_id == FLASH_UNKNOWN) {
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puts("missing or unknown FLASH type\n");
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return;
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}
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printf(" Size: %ld MB in %d Sectors\n",
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info->size >> 20, info->sector_count);
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puts(" Sector Start Addresses:");
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for (i = 0; i < info->sector_count; ++i) {
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#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
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int size;
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int erased;
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u32 *flash;
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/*
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* Check if whole sector is erased
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*/
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size = (info->size) / (info->sector_count);
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flash = (u32 *) info->start[i];
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size = size / sizeof(int);
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while ((size--) && (*flash++ == ~0))
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;
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size++;
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if (size)
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erased = 0;
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else
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erased = 1;
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if ((i % 5) == 0)
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printf("\n");
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printf(" %08lX%s%s",
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info->start[i],
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erased ? " E" : " ", info->protect[i] ? "RO " : " ");
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#else
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if ((i % 5) == 0)
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printf("\n ");
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printf(" %08lX%s",
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info->start[i], info->protect[i] ? " (RO) " : " ");
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#endif
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}
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putc('\n');
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return;
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}
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/*
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* flash_erase - Erase SMI flash
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*
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* Erase SMI flash
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*/
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int flash_erase(flash_info_t *info, int s_first, int s_last)
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{
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int rcode = 0;
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int prot = 0;
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flash_sect_t sect;
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if (info->flash_id != ST_M25Pxx_ID) {
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puts("Can't erase unknown flash type - aborted\n");
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return 1;
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}
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if ((s_first < 0) || (s_first > s_last)) {
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puts("- no sectors to erase\n");
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return 1;
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}
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for (sect = s_first; sect <= s_last; ++sect) {
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if (info->protect[sect])
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prot++;
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}
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if (prot) {
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printf("- Warning: %d protected sectors will not be erased!\n",
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prot);
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} else {
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putc('\n');
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}
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for (sect = s_first; sect <= s_last; sect++) {
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if (info->protect[sect] == 0) {
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if (smi_sector_erase(info, sect))
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rcode = 1;
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else
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putc('.');
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}
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}
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puts(" done\n");
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return rcode;
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}
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#endif
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