bcm53xx: drop unused source file of bcm53xxspiflash
We don't use this driver since commit 741715331a ("bcm53xx: switch to
m25p80 and drop bcm53xxspiflash").
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki
parent
ef4fc00c91
commit
c5ca3043d1
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/spi/spi.h>
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#include <linux/mtd/spi-nor.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/cfi.h>
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#include <linux/mtd/partitions.h>
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static const char * const probes[] = { "ofpart", "bcm47xxpart", NULL };
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struct bcm53xxsf {
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struct spi_device *spi;
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struct spi_nor nor;
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};
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/**************************************************
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* spi-nor API
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**************************************************/
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static int bcm53xxspiflash_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
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int len)
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{
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struct bcm53xxsf *b53sf = nor->priv;
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return spi_write_then_read(b53sf->spi, &opcode, 1, buf, len);
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}
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static int bcm53xxspiflash_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
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int len)
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{
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struct bcm53xxsf *b53sf = nor->priv;
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u8 *cmd = kzalloc(len + 1, GFP_KERNEL);
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int err;
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if (!cmd)
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return -ENOMEM;
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cmd[0] = opcode;
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memcpy(&cmd[1], buf, len);
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err = spi_write(b53sf->spi, cmd, len + 1);
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kfree(cmd);
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return err;
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}
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static int bcm53xxspiflash_read(struct spi_nor *nor, loff_t from, size_t len,
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size_t *retlen, u_char *buf)
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{
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struct bcm53xxsf *b53sf = nor->priv;
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struct spi_message m;
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struct spi_transfer t[2] = { { 0 }, { 0 } };
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unsigned char cmd[5];
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int cmd_len = 0;
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int err;
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spi_message_init(&m);
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cmd[cmd_len++] = SPINOR_OP_READ;
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if (nor->mtd.size > 0x1000000)
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cmd[cmd_len++] = (from & 0xFF000000) >> 24;
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cmd[cmd_len++] = (from & 0x00FF0000) >> 16;
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cmd[cmd_len++] = (from & 0x0000FF00) >> 8;
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cmd[cmd_len++] = (from & 0x000000FF) >> 0;
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t[0].tx_buf = cmd;
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t[0].len = cmd_len;
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spi_message_add_tail(&t[0], &m);
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t[1].rx_buf = buf;
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t[1].len = len;
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spi_message_add_tail(&t[1], &m);
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err = spi_sync(b53sf->spi, &m);
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if (err)
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return err;
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if (retlen && m.actual_length > cmd_len)
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*retlen = m.actual_length - cmd_len;
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return 0;
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}
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static void bcm53xxspiflash_write(struct spi_nor *nor, loff_t to, size_t len,
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size_t *retlen, const u_char *buf)
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{
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struct bcm53xxsf *b53sf = nor->priv;
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struct spi_message m;
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struct spi_transfer t = { 0 };
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u8 *cmd = kzalloc(len + 5, GFP_KERNEL);
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int cmd_len = 0;
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int err;
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if (!cmd)
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return;
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spi_message_init(&m);
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cmd[cmd_len++] = nor->program_opcode;
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if (nor->mtd.size > 0x1000000)
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cmd[cmd_len++] = (to & 0xFF000000) >> 24;
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cmd[cmd_len++] = (to & 0x00FF0000) >> 16;
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cmd[cmd_len++] = (to & 0x0000FF00) >> 8;
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cmd[cmd_len++] = (to & 0x000000FF) >> 0;
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memcpy(&cmd[cmd_len], buf, len);
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t.tx_buf = cmd;
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t.len = cmd_len + len;
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spi_message_add_tail(&t, &m);
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err = spi_sync(b53sf->spi, &m);
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if (err)
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goto out;
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if (retlen && m.actual_length > cmd_len)
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*retlen += m.actual_length - cmd_len;
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out:
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kfree(cmd);
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}
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static int bcm53xxspiflash_erase(struct spi_nor *nor, loff_t offs)
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{
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struct bcm53xxsf *b53sf = nor->priv;
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unsigned char cmd[5];
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int i;
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i = 0;
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cmd[i++] = nor->erase_opcode;
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if (nor->mtd.size > 0x1000000)
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cmd[i++] = (offs & 0xFF000000) >> 24;
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cmd[i++] = ((offs & 0x00FF0000) >> 16);
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cmd[i++] = ((offs & 0x0000FF00) >> 8);
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cmd[i++] = ((offs & 0x000000FF) >> 0);
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return spi_write(b53sf->spi, cmd, i);
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}
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static const char *bcm53xxspiflash_chip_name(struct spi_nor *nor)
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{
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struct bcm53xxsf *b53sf = nor->priv;
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struct device *dev = &b53sf->spi->dev;
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unsigned char cmd[4];
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unsigned char resp[2];
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int err;
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/* SST and Winbond/NexFlash specific command */
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cmd[0] = 0x90; /* Read Manufacturer / Device ID */
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cmd[1] = 0;
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cmd[2] = 0;
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cmd[3] = 0;
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err = spi_write_then_read(b53sf->spi, cmd, 4, resp, 2);
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if (err < 0) {
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dev_err(dev, "error reading SPI flash id\n");
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return ERR_PTR(-EBUSY);
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}
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switch (resp[0]) {
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case 0xef: /* Winbond/NexFlash */
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switch (resp[1]) {
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case 0x17:
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return "w25q128";
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}
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dev_err(dev, "Unknown Winbond/NexFlash flash: %02X %02X\n",
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resp[0], resp[1]);
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return NULL;
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}
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/* TODO: Try more ID commands */
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return NULL;
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}
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/**************************************************
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* SPI driver
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**************************************************/
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static int bcm53xxspiflash_probe(struct spi_device *spi)
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{
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struct mtd_part_parser_data parser_data = {};
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struct bcm53xxsf *b53sf;
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struct spi_nor *nor;
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int err;
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b53sf = devm_kzalloc(&spi->dev, sizeof(*b53sf), GFP_KERNEL);
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if (!b53sf)
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return -ENOMEM;
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spi_set_drvdata(spi, b53sf);
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nor = &b53sf->nor;
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b53sf->spi = spi;
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nor->dev = &spi->dev;
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nor->read_reg = bcm53xxspiflash_read_reg;
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nor->write_reg = bcm53xxspiflash_write_reg;
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nor->read = bcm53xxspiflash_read;
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nor->write = bcm53xxspiflash_write;
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nor->erase = bcm53xxspiflash_erase;
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nor->priv = b53sf;
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err = spi_nor_scan(&b53sf->nor, bcm53xxspiflash_chip_name(nor),
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SPI_NOR_NORMAL);
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if (err)
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return err;
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parser_data.of_node = spi->master->dev.parent->of_node;
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err = mtd_device_parse_register(&nor->mtd, probes, &parser_data,
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NULL, 0);
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if (err)
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return err;
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return 0;
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}
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static int bcm53xxspiflash_remove(struct spi_device *spi)
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{
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return 0;
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}
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static struct spi_driver bcm53xxspiflash_driver = {
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.driver = {
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.name = "bcm53xxspiflash",
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.owner = THIS_MODULE,
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},
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.probe = bcm53xxspiflash_probe,
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.remove = bcm53xxspiflash_remove,
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};
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module_spi_driver(bcm53xxspiflash_driver);
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