| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Atmel DataFlash probing |
| * |
| * Copyright (C) 2004-2009, 2015 Freescale Semiconductor, Inc. |
| * Haikun Wang (haikun.wang@freescale.com) |
| */ |
| |
| #include <common.h> |
| #include <dm.h> |
| #include <errno.h> |
| #include <fdtdec.h> |
| #include <flash.h> |
| #include <log.h> |
| #include <spi.h> |
| #include <spi_flash.h> |
| #include <div64.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/math64.h> |
| |
| #include "sf_internal.h" |
| |
| #define CMD_READ_ID 0x9f |
| /* reads can bypass the buffers */ |
| #define OP_READ_CONTINUOUS 0xE8 |
| #define OP_READ_PAGE 0xD2 |
| |
| /* group B requests can run even while status reports "busy" */ |
| #define OP_READ_STATUS 0xD7 /* group B */ |
| |
| /* move data between host and buffer */ |
| #define OP_READ_BUFFER1 0xD4 /* group B */ |
| #define OP_READ_BUFFER2 0xD6 /* group B */ |
| #define OP_WRITE_BUFFER1 0x84 /* group B */ |
| #define OP_WRITE_BUFFER2 0x87 /* group B */ |
| |
| /* erasing flash */ |
| #define OP_ERASE_PAGE 0x81 |
| #define OP_ERASE_BLOCK 0x50 |
| |
| /* move data between buffer and flash */ |
| #define OP_TRANSFER_BUF1 0x53 |
| #define OP_TRANSFER_BUF2 0x55 |
| #define OP_MREAD_BUFFER1 0xD4 |
| #define OP_MREAD_BUFFER2 0xD6 |
| #define OP_MWERASE_BUFFER1 0x83 |
| #define OP_MWERASE_BUFFER2 0x86 |
| #define OP_MWRITE_BUFFER1 0x88 /* sector must be pre-erased */ |
| #define OP_MWRITE_BUFFER2 0x89 /* sector must be pre-erased */ |
| |
| /* write to buffer, then write-erase to flash */ |
| #define OP_PROGRAM_VIA_BUF1 0x82 |
| #define OP_PROGRAM_VIA_BUF2 0x85 |
| |
| /* compare buffer to flash */ |
| #define OP_COMPARE_BUF1 0x60 |
| #define OP_COMPARE_BUF2 0x61 |
| |
| /* read flash to buffer, then write-erase to flash */ |
| #define OP_REWRITE_VIA_BUF1 0x58 |
| #define OP_REWRITE_VIA_BUF2 0x59 |
| |
| /* |
| * newer chips report JEDEC manufacturer and device IDs; chip |
| * serial number and OTP bits; and per-sector writeprotect. |
| */ |
| #define OP_READ_ID 0x9F |
| #define OP_READ_SECURITY 0x77 |
| #define OP_WRITE_SECURITY_REVC 0x9A |
| #define OP_WRITE_SECURITY 0x9B /* revision D */ |
| |
| struct dataflash { |
| uint8_t command[16]; |
| unsigned short page_offset; /* offset in flash address */ |
| }; |
| |
| /* Return the status of the DataFlash device */ |
| static inline int dataflash_status(struct spi_slave *spi) |
| { |
| int ret; |
| u8 opcode = OP_READ_STATUS; |
| u8 status; |
| |
| /* |
| * NOTE: at45db321c over 25 MHz wants to write |
| * a dummy byte after the opcode... |
| */ |
| ret = spi_write_then_read(spi, &opcode, 1, NULL, &status, 1); |
| return ret ? -EIO : status; |
| } |
| |
| /* |
| * Poll the DataFlash device until it is READY. |
| * This usually takes 5-20 msec or so; more for sector erase. |
| * ready: return > 0 |
| */ |
| static int dataflash_waitready(struct spi_slave *spi) |
| { |
| int status; |
| int timeout = 2 * CONFIG_SYS_HZ; |
| int timebase; |
| |
| timebase = get_timer(0); |
| do { |
| status = dataflash_status(spi); |
| if (status < 0) |
| status = 0; |
| |
| if (status & (1 << 7)) /* RDY/nBSY */ |
| return status; |
| |
| mdelay(3); |
| } while (get_timer(timebase) < timeout); |
| |
| return -ETIME; |
| } |
| |
| /* Erase pages of flash */ |
| static int spi_dataflash_erase(struct udevice *dev, u32 offset, size_t len) |
| { |
| struct dataflash *dataflash; |
| struct spi_flash *spi_flash; |
| struct spi_slave *spi; |
| unsigned blocksize; |
| uint8_t *command; |
| uint32_t rem; |
| int status; |
| |
| dataflash = dev_get_priv(dev); |
| spi_flash = dev_get_uclass_priv(dev); |
| spi = spi_flash->spi; |
| |
| blocksize = spi_flash->page_size << 3; |
| |
| memset(dataflash->command, 0 , sizeof(dataflash->command)); |
| command = dataflash->command; |
| |
| debug("%s: erase addr=0x%x len 0x%x\n", dev->name, offset, len); |
| |
| div_u64_rem(len, spi_flash->page_size, &rem); |
| if (rem) { |
| printf("%s: len(0x%x) isn't the multiple of page size(0x%x)\n", |
| dev->name, len, spi_flash->page_size); |
| return -EINVAL; |
| } |
| div_u64_rem(offset, spi_flash->page_size, &rem); |
| if (rem) { |
| printf("%s: offset(0x%x) isn't the multiple of page size(0x%x)\n", |
| dev->name, offset, spi_flash->page_size); |
| return -EINVAL; |
| } |
| |
| status = spi_claim_bus(spi); |
| if (status) { |
| debug("dataflash: unable to claim SPI bus\n"); |
| return status; |
| } |
| |
| while (len > 0) { |
| unsigned int pageaddr; |
| int do_block; |
| /* |
| * Calculate flash page address; use block erase (for speed) if |
| * we're at a block boundary and need to erase the whole block. |
| */ |
| pageaddr = div_u64(offset, spi_flash->page_size); |
| do_block = (pageaddr & 0x7) == 0 && len >= blocksize; |
| pageaddr = pageaddr << dataflash->page_offset; |
| |
| command[0] = do_block ? OP_ERASE_BLOCK : OP_ERASE_PAGE; |
| command[1] = (uint8_t)(pageaddr >> 16); |
| command[2] = (uint8_t)(pageaddr >> 8); |
| command[3] = 0; |
| |
| debug("%s ERASE %s: (%x) %x %x %x [%d]\n", |
| dev->name, do_block ? "block" : "page", |
| command[0], command[1], command[2], command[3], |
| pageaddr); |
| |
| status = spi_write_then_read(spi, command, 4, NULL, NULL, 0); |
| if (status < 0) { |
| debug("%s: erase send command error!\n", dev->name); |
| return -EIO; |
| } |
| |
| status = dataflash_waitready(spi); |
| if (status < 0) { |
| debug("%s: erase waitready error!\n", dev->name); |
| return status; |
| } |
| |
| if (do_block) { |
| offset += blocksize; |
| len -= blocksize; |
| } else { |
| offset += spi_flash->page_size; |
| len -= spi_flash->page_size; |
| } |
| } |
| |
| spi_release_bus(spi); |
| |
| return 0; |
| } |
| |
| /* |
| * Read from the DataFlash device. |
| * offset : Start offset in flash device |
| * len : Amount to read |
| * buf : Buffer containing the data |
| */ |
| static int spi_dataflash_read(struct udevice *dev, u32 offset, size_t len, |
| void *buf) |
| { |
| struct dataflash *dataflash; |
| struct spi_flash *spi_flash; |
| struct spi_slave *spi; |
| unsigned int addr; |
| uint8_t *command; |
| int status; |
| |
| dataflash = dev_get_priv(dev); |
| spi_flash = dev_get_uclass_priv(dev); |
| spi = spi_flash->spi; |
| |
| memset(dataflash->command, 0 , sizeof(dataflash->command)); |
| command = dataflash->command; |
| |
| debug("%s: erase addr=0x%x len 0x%x\n", dev->name, offset, len); |
| debug("READ: (%x) %x %x %x\n", |
| command[0], command[1], command[2], command[3]); |
| |
| /* Calculate flash page/byte address */ |
| addr = (((unsigned)offset / spi_flash->page_size) |
| << dataflash->page_offset) |
| + ((unsigned)offset % spi_flash->page_size); |
| |
| status = spi_claim_bus(spi); |
| if (status) { |
| debug("dataflash: unable to claim SPI bus\n"); |
| return status; |
| } |
| |
| /* |
| * Continuous read, max clock = f(car) which may be less than |
| * the peak rate available. Some chips support commands with |
| * fewer "don't care" bytes. Both buffers stay unchanged. |
| */ |
| command[0] = OP_READ_CONTINUOUS; |
| command[1] = (uint8_t)(addr >> 16); |
| command[2] = (uint8_t)(addr >> 8); |
| command[3] = (uint8_t)(addr >> 0); |
| |
| /* plus 4 "don't care" bytes, command len: 4 + 4 "don't care" bytes */ |
| status = spi_write_then_read(spi, command, 8, NULL, buf, len); |
| |
| spi_release_bus(spi); |
| |
| return status; |
| } |
| |
| /* |
| * Write to the DataFlash device. |
| * offset : Start offset in flash device |
| * len : Amount to write |
| * buf : Buffer containing the data |
| */ |
| int spi_dataflash_write(struct udevice *dev, u32 offset, size_t len, |
| const void *buf) |
| { |
| struct dataflash *dataflash; |
| struct spi_flash *spi_flash; |
| struct spi_slave *spi; |
| uint8_t *command; |
| unsigned int pageaddr, addr, to, writelen; |
| size_t remaining = len; |
| u_char *writebuf = (u_char *)buf; |
| int status = -EINVAL; |
| |
| dataflash = dev_get_priv(dev); |
| spi_flash = dev_get_uclass_priv(dev); |
| spi = spi_flash->spi; |
| |
| memset(dataflash->command, 0 , sizeof(dataflash->command)); |
| command = dataflash->command; |
| |
| debug("%s: write 0x%x..0x%x\n", dev->name, offset, (offset + len)); |
| |
| pageaddr = ((unsigned)offset / spi_flash->page_size); |
| to = ((unsigned)offset % spi_flash->page_size); |
| if (to + len > spi_flash->page_size) |
| writelen = spi_flash->page_size - to; |
| else |
| writelen = len; |
| |
| status = spi_claim_bus(spi); |
| if (status) { |
| debug("dataflash: unable to claim SPI bus\n"); |
| return status; |
| } |
| |
| while (remaining > 0) { |
| debug("write @ %d:%d len=%d\n", pageaddr, to, writelen); |
| |
| /* |
| * REVISIT: |
| * (a) each page in a sector must be rewritten at least |
| * once every 10K sibling erase/program operations. |
| * (b) for pages that are already erased, we could |
| * use WRITE+MWRITE not PROGRAM for ~30% speedup. |
| * (c) WRITE to buffer could be done while waiting for |
| * a previous MWRITE/MWERASE to complete ... |
| * (d) error handling here seems to be mostly missing. |
| * |
| * Two persistent bits per page, plus a per-sector counter, |
| * could support (a) and (b) ... we might consider using |
| * the second half of sector zero, which is just one block, |
| * to track that state. (On AT91, that sector should also |
| * support boot-from-DataFlash.) |
| */ |
| |
| addr = pageaddr << dataflash->page_offset; |
| |
| /* (1) Maybe transfer partial page to Buffer1 */ |
| if (writelen != spi_flash->page_size) { |
| command[0] = OP_TRANSFER_BUF1; |
| command[1] = (addr & 0x00FF0000) >> 16; |
| command[2] = (addr & 0x0000FF00) >> 8; |
| command[3] = 0; |
| |
| debug("TRANSFER: (%x) %x %x %x\n", |
| command[0], command[1], command[2], command[3]); |
| |
| status = spi_write_then_read(spi, command, 4, |
| NULL, NULL, 0); |
| if (status < 0) { |
| debug("%s: write(<pagesize) command error!\n", |
| dev->name); |
| return -EIO; |
| } |
| |
| status = dataflash_waitready(spi); |
| if (status < 0) { |
| debug("%s: write(<pagesize) waitready error!\n", |
| dev->name); |
| return status; |
| } |
| } |
| |
| /* (2) Program full page via Buffer1 */ |
| addr += to; |
| command[0] = OP_PROGRAM_VIA_BUF1; |
| command[1] = (addr & 0x00FF0000) >> 16; |
| command[2] = (addr & 0x0000FF00) >> 8; |
| command[3] = (addr & 0x000000FF); |
| |
| debug("PROGRAM: (%x) %x %x %x\n", |
| command[0], command[1], command[2], command[3]); |
| |
| status = spi_write_then_read(spi, command, 4, |
| writebuf, NULL, writelen); |
| if (status < 0) { |
| debug("%s: write send command error!\n", dev->name); |
| return -EIO; |
| } |
| |
| status = dataflash_waitready(spi); |
| if (status < 0) { |
| debug("%s: write waitready error!\n", dev->name); |
| return status; |
| } |
| |
| #ifdef CONFIG_SPI_DATAFLASH_WRITE_VERIFY |
| /* (3) Compare to Buffer1 */ |
| addr = pageaddr << dataflash->page_offset; |
| command[0] = OP_COMPARE_BUF1; |
| command[1] = (addr & 0x00FF0000) >> 16; |
| command[2] = (addr & 0x0000FF00) >> 8; |
| command[3] = 0; |
| |
| debug("COMPARE: (%x) %x %x %x\n", |
| command[0], command[1], command[2], command[3]); |
| |
| status = spi_write_then_read(spi, command, 4, |
| writebuf, NULL, writelen); |
| if (status < 0) { |
| debug("%s: write(compare) send command error!\n", |
| dev->name); |
| return -EIO; |
| } |
| |
| status = dataflash_waitready(spi); |
| |
| /* Check result of the compare operation */ |
| if (status & (1 << 6)) { |
| printf("dataflash: write compare page %u, err %d\n", |
| pageaddr, status); |
| remaining = 0; |
| status = -EIO; |
| break; |
| } else { |
| status = 0; |
| } |
| |
| #endif /* CONFIG_SPI_DATAFLASH_WRITE_VERIFY */ |
| remaining = remaining - writelen; |
| pageaddr++; |
| to = 0; |
| writebuf += writelen; |
| |
| if (remaining > spi_flash->page_size) |
| writelen = spi_flash->page_size; |
| else |
| writelen = remaining; |
| } |
| |
| spi_release_bus(spi); |
| |
| return 0; |
| } |
| |
| static int add_dataflash(struct udevice *dev, char *name, int nr_pages, |
| int pagesize, int pageoffset, char revision) |
| { |
| struct spi_flash *spi_flash; |
| struct dataflash *dataflash; |
| |
| dataflash = dev_get_priv(dev); |
| spi_flash = dev_get_uclass_priv(dev); |
| |
| dataflash->page_offset = pageoffset; |
| |
| spi_flash->name = name; |
| spi_flash->page_size = pagesize; |
| spi_flash->size = nr_pages * pagesize; |
| spi_flash->erase_size = pagesize; |
| |
| #ifndef CONFIG_SPL_BUILD |
| printf("SPI DataFlash: Detected %s with page size ", spi_flash->name); |
| print_size(spi_flash->page_size, ", erase size "); |
| print_size(spi_flash->erase_size, ", total "); |
| print_size(spi_flash->size, ""); |
| printf(", revision %c", revision); |
| puts("\n"); |
| #endif |
| |
| return 0; |
| } |
| |
| struct data_flash_info { |
| char *name; |
| |
| /* |
| * JEDEC id has a high byte of zero plus three data bytes: |
| * the manufacturer id, then a two byte device id. |
| */ |
| uint32_t jedec_id; |
| |
| /* The size listed here is what works with OP_ERASE_PAGE. */ |
| unsigned nr_pages; |
| uint16_t pagesize; |
| uint16_t pageoffset; |
| |
| uint16_t flags; |
| #define SUP_POW2PS 0x0002 /* supports 2^N byte pages */ |
| #define IS_POW2PS 0x0001 /* uses 2^N byte pages */ |
| }; |
| |
| static struct data_flash_info dataflash_data[] = { |
| /* |
| * NOTE: chips with SUP_POW2PS (rev D and up) need two entries, |
| * one with IS_POW2PS and the other without. The entry with the |
| * non-2^N byte page size can't name exact chip revisions without |
| * losing backwards compatibility for cmdlinepart. |
| * |
| * Those two entries have different name spelling format in order to |
| * show their difference obviously. |
| * The upper case refer to the chip isn't in normal 2^N bytes page-size |
| * mode. |
| * The lower case refer to the chip is in normal 2^N bytes page-size |
| * mode. |
| * |
| * These newer chips also support 128-byte security registers (with |
| * 64 bytes one-time-programmable) and software write-protection. |
| */ |
| { "AT45DB011B", 0x1f2200, 512, 264, 9, SUP_POW2PS}, |
| { "at45db011d", 0x1f2200, 512, 256, 8, SUP_POW2PS | IS_POW2PS}, |
| |
| { "AT45DB021B", 0x1f2300, 1024, 264, 9, SUP_POW2PS}, |
| { "at45db021d", 0x1f2300, 1024, 256, 8, SUP_POW2PS | IS_POW2PS}, |
| |
| { "AT45DB041x", 0x1f2400, 2048, 264, 9, SUP_POW2PS}, |
| { "at45db041d", 0x1f2400, 2048, 256, 8, SUP_POW2PS | IS_POW2PS}, |
| |
| { "AT45DB081B", 0x1f2500, 4096, 264, 9, SUP_POW2PS}, |
| { "at45db081d", 0x1f2500, 4096, 256, 8, SUP_POW2PS | IS_POW2PS}, |
| |
| { "AT45DB161x", 0x1f2600, 4096, 528, 10, SUP_POW2PS}, |
| { "at45db161d", 0x1f2600, 4096, 512, 9, SUP_POW2PS | IS_POW2PS}, |
| |
| { "AT45DB321x", 0x1f2700, 8192, 528, 10, 0}, /* rev C */ |
| |
| { "AT45DB321x", 0x1f2701, 8192, 528, 10, SUP_POW2PS}, |
| { "at45db321d", 0x1f2701, 8192, 512, 9, SUP_POW2PS | IS_POW2PS}, |
| |
| { "AT45DB642x", 0x1f2800, 8192, 1056, 11, SUP_POW2PS}, |
| { "at45db642d", 0x1f2800, 8192, 1024, 10, SUP_POW2PS | IS_POW2PS}, |
| }; |
| |
| static struct data_flash_info *jedec_probe(struct spi_slave *spi) |
| { |
| int tmp; |
| uint8_t id[5]; |
| uint32_t jedec; |
| struct data_flash_info *info; |
| u8 opcode = CMD_READ_ID; |
| int status; |
| |
| /* |
| * JEDEC also defines an optional "extended device information" |
| * string for after vendor-specific data, after the three bytes |
| * we use here. Supporting some chips might require using it. |
| * |
| * If the vendor ID isn't Atmel's (0x1f), assume this call failed. |
| * That's not an error; only rev C and newer chips handle it, and |
| * only Atmel sells these chips. |
| */ |
| tmp = spi_write_then_read(spi, &opcode, 1, NULL, id, sizeof(id)); |
| if (tmp < 0) { |
| printf("dataflash: error %d reading JEDEC ID\n", tmp); |
| return ERR_PTR(tmp); |
| } |
| if (id[0] != 0x1f) |
| return NULL; |
| |
| jedec = id[0]; |
| jedec = jedec << 8; |
| jedec |= id[1]; |
| jedec = jedec << 8; |
| jedec |= id[2]; |
| |
| for (tmp = 0, info = dataflash_data; |
| tmp < ARRAY_SIZE(dataflash_data); |
| tmp++, info++) { |
| if (info->jedec_id == jedec) { |
| if (info->flags & SUP_POW2PS) { |
| status = dataflash_status(spi); |
| if (status < 0) { |
| debug("dataflash: status error %d\n", |
| status); |
| return NULL; |
| } |
| if (status & 0x1) { |
| if (info->flags & IS_POW2PS) |
| return info; |
| } else { |
| if (!(info->flags & IS_POW2PS)) |
| return info; |
| } |
| } else { |
| return info; |
| } |
| } |
| } |
| |
| /* |
| * Treat other chips as errors ... we won't know the right page |
| * size (it might be binary) even when we can tell which density |
| * class is involved (legacy chip id scheme). |
| */ |
| printf("dataflash: JEDEC id %06x not handled\n", jedec); |
| return ERR_PTR(-ENODEV); |
| } |
| |
| /* |
| * Detect and initialize DataFlash device, using JEDEC IDs on newer chips |
| * or else the ID code embedded in the status bits: |
| * |
| * Device Density ID code #Pages PageSize Offset |
| * AT45DB011B 1Mbit (128K) xx0011xx (0x0c) 512 264 9 |
| * AT45DB021B 2Mbit (256K) xx0101xx (0x14) 1024 264 9 |
| * AT45DB041B 4Mbit (512K) xx0111xx (0x1c) 2048 264 9 |
| * AT45DB081B 8Mbit (1M) xx1001xx (0x24) 4096 264 9 |
| * AT45DB0161B 16Mbit (2M) xx1011xx (0x2c) 4096 528 10 |
| * AT45DB0321B 32Mbit (4M) xx1101xx (0x34) 8192 528 10 |
| * AT45DB0642 64Mbit (8M) xx111xxx (0x3c) 8192 1056 11 |
| * AT45DB1282 128Mbit (16M) xx0100xx (0x10) 16384 1056 11 |
| */ |
| static int spi_dataflash_probe(struct udevice *dev) |
| { |
| struct spi_slave *spi = dev_get_parent_priv(dev); |
| struct spi_flash *spi_flash; |
| struct data_flash_info *info; |
| int status; |
| |
| spi_flash = dev_get_uclass_priv(dev); |
| spi_flash->spi = spi; |
| spi_flash->dev = dev; |
| |
| status = spi_claim_bus(spi); |
| if (status) |
| return status; |
| |
| /* |
| * Try to detect dataflash by JEDEC ID. |
| * If it succeeds we know we have either a C or D part. |
| * D will support power of 2 pagesize option. |
| * Both support the security register, though with different |
| * write procedures. |
| */ |
| info = jedec_probe(spi); |
| if (IS_ERR(info)) |
| goto err_jedec_probe; |
| if (info != NULL) { |
| status = add_dataflash(dev, info->name, info->nr_pages, |
| info->pagesize, info->pageoffset, |
| (info->flags & SUP_POW2PS) ? 'd' : 'c'); |
| if (status < 0) |
| goto err_status; |
| } |
| |
| /* |
| * Older chips support only legacy commands, identifing |
| * capacity using bits in the status byte. |
| */ |
| status = dataflash_status(spi); |
| if (status <= 0 || status == 0xff) { |
| printf("dataflash: read status error %d\n", status); |
| if (status == 0 || status == 0xff) |
| status = -ENODEV; |
| goto err_jedec_probe; |
| } |
| |
| /* |
| * if there's a device there, assume it's dataflash. |
| * board setup should have set spi->max_speed_max to |
| * match f(car) for continuous reads, mode 0 or 3. |
| */ |
| switch (status & 0x3c) { |
| case 0x0c: /* 0 0 1 1 x x */ |
| status = add_dataflash(dev, "AT45DB011B", 512, 264, 9, 0); |
| break; |
| case 0x14: /* 0 1 0 1 x x */ |
| status = add_dataflash(dev, "AT45DB021B", 1024, 264, 9, 0); |
| break; |
| case 0x1c: /* 0 1 1 1 x x */ |
| status = add_dataflash(dev, "AT45DB041x", 2048, 264, 9, 0); |
| break; |
| case 0x24: /* 1 0 0 1 x x */ |
| status = add_dataflash(dev, "AT45DB081B", 4096, 264, 9, 0); |
| break; |
| case 0x2c: /* 1 0 1 1 x x */ |
| status = add_dataflash(dev, "AT45DB161x", 4096, 528, 10, 0); |
| break; |
| case 0x34: /* 1 1 0 1 x x */ |
| status = add_dataflash(dev, "AT45DB321x", 8192, 528, 10, 0); |
| break; |
| case 0x38: /* 1 1 1 x x x */ |
| case 0x3c: |
| status = add_dataflash(dev, "AT45DB642x", 8192, 1056, 11, 0); |
| break; |
| /* obsolete AT45DB1282 not (yet?) supported */ |
| default: |
| printf("dataflash: unsupported device (%x)\n", status & 0x3c); |
| status = -ENODEV; |
| goto err_status; |
| } |
| |
| return status; |
| |
| err_status: |
| spi_free_slave(spi); |
| err_jedec_probe: |
| spi_release_bus(spi); |
| return status; |
| } |
| |
| static const struct dm_spi_flash_ops spi_dataflash_ops = { |
| .read = spi_dataflash_read, |
| .write = spi_dataflash_write, |
| .erase = spi_dataflash_erase, |
| }; |
| |
| static const struct udevice_id spi_dataflash_ids[] = { |
| { .compatible = "atmel,at45", }, |
| { .compatible = "atmel,dataflash", }, |
| { } |
| }; |
| |
| U_BOOT_DRIVER(spi_dataflash) = { |
| .name = "spi_dataflash", |
| .id = UCLASS_SPI_FLASH, |
| .of_match = spi_dataflash_ids, |
| .probe = spi_dataflash_probe, |
| .priv_auto = sizeof(struct dataflash), |
| .ops = &spi_dataflash_ops, |
| }; |