diff options
Diffstat (limited to 'drivers/mtd/altera_qspi.c')
| -rw-r--r-- | drivers/mtd/altera_qspi.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/drivers/mtd/altera_qspi.c b/drivers/mtd/altera_qspi.c new file mode 100644 index 0000000..1826dc8 --- /dev/null +++ b/drivers/mtd/altera_qspi.c @@ -0,0 +1,273 @@ +/* + * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <fdt_support.h> +#include <flash.h> +#include <mtd.h> +#include <asm/io.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * The QUADSPI_MEM_OP register is used to do memory protect and erase operations + */ +#define QUADSPI_MEM_OP_BULK_ERASE 0x00000001 +#define QUADSPI_MEM_OP_SECTOR_ERASE 0x00000002 +#define QUADSPI_MEM_OP_SECTOR_PROTECT 0x00000003 + +/* + * The QUADSPI_ISR register is used to determine whether an invalid write or + * erase operation trigerred an interrupt + */ +#define QUADSPI_ISR_ILLEGAL_ERASE BIT(0) +#define QUADSPI_ISR_ILLEGAL_WRITE BIT(1) + +struct altera_qspi_regs { + u32 rd_status; + u32 rd_sid; + u32 rd_rdid; + u32 mem_op; + u32 isr; + u32 imr; + u32 chip_select; +}; + +struct altera_qspi_platdata { + struct altera_qspi_regs *regs; + void *base; + unsigned long size; +}; + +flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* FLASH chips info */ + +void flash_print_info(flash_info_t *info) +{ + printf("Altera QSPI flash Size: %ld MB in %d Sectors\n", + info->size >> 20, info->sector_count); +} + +int flash_erase(flash_info_t *info, int s_first, int s_last) +{ + struct mtd_info *mtd = info->mtd; + struct erase_info instr; + int ret; + + memset(&instr, 0, sizeof(instr)); + instr.addr = mtd->erasesize * s_first; + instr.len = mtd->erasesize * (s_last + 1 - s_first); + ret = mtd_erase(mtd, &instr); + if (ret) + return ERR_NOT_ERASED; + + return 0; +} + +int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + struct mtd_info *mtd = info->mtd; + struct udevice *dev = mtd->dev; + struct altera_qspi_platdata *pdata = dev_get_platdata(dev); + ulong base = (ulong)pdata->base; + loff_t to = addr - base; + size_t retlen; + int ret; + + ret = mtd_write(mtd, to, cnt, &retlen, src); + if (ret) + return ERR_NOT_ERASED; + + return 0; +} + +unsigned long flash_init(void) +{ + struct udevice *dev; + + /* probe every MTD device */ + for (uclass_first_device(UCLASS_MTD, &dev); + dev; + uclass_next_device(&dev)) { + } + + return flash_info[0].size; +} + +static int altera_qspi_erase(struct mtd_info *mtd, struct erase_info *instr) +{ + struct udevice *dev = mtd->dev; + struct altera_qspi_platdata *pdata = dev_get_platdata(dev); + struct altera_qspi_regs *regs = pdata->regs; + size_t addr = instr->addr; + size_t len = instr->len; + size_t end = addr + len; + u32 sect; + u32 stat; + + instr->state = MTD_ERASING; + addr &= ~(mtd->erasesize - 1); /* get lower aligned address */ + while (addr < end) { + sect = addr / mtd->erasesize; + sect <<= 8; + sect |= QUADSPI_MEM_OP_SECTOR_ERASE; + debug("erase %08x\n", sect); + writel(sect, ®s->mem_op); + stat = readl(®s->isr); + if (stat & QUADSPI_ISR_ILLEGAL_ERASE) { + /* erase failed, sector might be protected */ + debug("erase %08x fail %x\n", sect, stat); + writel(stat, ®s->isr); /* clear isr */ + instr->state = MTD_ERASE_FAILED; + return -EIO; + } + addr += mtd->erasesize; + } + instr->state = MTD_ERASE_DONE; + mtd_erase_callback(instr); + + return 0; +} + +static int altera_qspi_read(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, u_char *buf) +{ + struct udevice *dev = mtd->dev; + struct altera_qspi_platdata *pdata = dev_get_platdata(dev); + + memcpy_fromio(buf, pdata->base + from, len); + *retlen = len; + + return 0; +} + +static int altera_qspi_write(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const u_char *buf) +{ + struct udevice *dev = mtd->dev; + struct altera_qspi_platdata *pdata = dev_get_platdata(dev); + struct altera_qspi_regs *regs = pdata->regs; + u32 stat; + + memcpy_toio(pdata->base + to, buf, len); + /* check whether write triggered a illegal write interrupt */ + stat = readl(®s->isr); + if (stat & QUADSPI_ISR_ILLEGAL_WRITE) { + /* write failed, sector might be protected */ + debug("write fail %x\n", stat); + writel(stat, ®s->isr); /* clear isr */ + return -EIO; + } + *retlen = len; + + return 0; +} + +static void altera_qspi_sync(struct mtd_info *mtd) +{ +} + +static int altera_qspi_probe(struct udevice *dev) +{ + struct altera_qspi_platdata *pdata = dev_get_platdata(dev); + struct altera_qspi_regs *regs = pdata->regs; + unsigned long base = (unsigned long)pdata->base; + struct mtd_info *mtd; + flash_info_t *flash = &flash_info[0]; + u32 rdid; + int i; + + rdid = readl(®s->rd_rdid); + debug("rdid %x\n", rdid); + + mtd = dev_get_uclass_priv(dev); + mtd->dev = dev; + mtd->name = "nor0"; + mtd->type = MTD_NORFLASH; + mtd->flags = MTD_CAP_NORFLASH; + mtd->size = 1 << ((rdid & 0xff) - 6); + mtd->writesize = 1; + mtd->writebufsize = mtd->writesize; + mtd->_erase = altera_qspi_erase; + mtd->_read = altera_qspi_read; + mtd->_write = altera_qspi_write; + mtd->_sync = altera_qspi_sync; + mtd->numeraseregions = 0; + mtd->erasesize = 0x10000; + if (add_mtd_device(mtd)) + return -ENOMEM; + + flash->mtd = mtd; + flash->size = mtd->size; + flash->sector_count = mtd->size / mtd->erasesize; + flash->flash_id = rdid; + flash->start[0] = base; + for (i = 1; i < flash->sector_count; i++) + flash->start[i] = flash->start[i - 1] + mtd->erasesize; + gd->bd->bi_flashstart = base; + + return 0; +} + +static int altera_qspi_ofdata_to_platdata(struct udevice *dev) +{ + struct altera_qspi_platdata *pdata = dev_get_platdata(dev); + void *blob = (void *)gd->fdt_blob; + int node = dev->of_offset; + const char *list, *end; + const fdt32_t *cell; + void *base; + unsigned long addr, size; + int parent, addrc, sizec; + int len, idx; + + /* + * decode regs. there are multiple reg tuples, and they need to + * match with reg-names. + */ + parent = fdt_parent_offset(blob, node); + of_bus_default_count_cells(blob, parent, &addrc, &sizec); + list = fdt_getprop(blob, node, "reg-names", &len); + if (!list) + return -ENOENT; + end = list + len; + cell = fdt_getprop(blob, node, "reg", &len); + if (!cell) + return -ENOENT; + idx = 0; + while (list < end) { + addr = fdt_translate_address((void *)blob, + node, cell + idx); + size = fdt_addr_to_cpu(cell[idx + addrc]); + base = ioremap(addr, size); + len = strlen(list); + if (strcmp(list, "avl_csr") == 0) { + pdata->regs = base; + } else if (strcmp(list, "avl_mem") == 0) { + pdata->base = base; + pdata->size = size; + } + idx += addrc + sizec; + list += (len + 1); + } + + return 0; +} + +static const struct udevice_id altera_qspi_ids[] = { + { .compatible = "altr,quadspi-1.0" }, + {} +}; + +U_BOOT_DRIVER(altera_qspi) = { + .name = "altera_qspi", + .id = UCLASS_MTD, + .of_match = altera_qspi_ids, + .ofdata_to_platdata = altera_qspi_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct altera_qspi_platdata), + .probe = altera_qspi_probe, +}; |