diff options
Diffstat (limited to 'drivers/spi/spi-mem.c')
-rw-r--r-- | drivers/spi/spi-mem.c | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index c095ae9505..9c1ede1b61 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -145,8 +145,8 @@ static int spi_check_buswidth_req(struct spi_slave *slave, u8 buswidth, bool tx) return -ENOTSUPP; } -bool spi_mem_default_supports_op(struct spi_slave *slave, - const struct spi_mem_op *op) +static bool spi_mem_check_buswidth(struct spi_slave *slave, + const struct spi_mem_op *op) { if (spi_check_buswidth_req(slave, op->cmd.buswidth, true)) return false; @@ -166,6 +166,38 @@ bool spi_mem_default_supports_op(struct spi_slave *slave, return true; } + +bool spi_mem_dtr_supports_op(struct spi_slave *slave, + const struct spi_mem_op *op) +{ + if (op->cmd.buswidth == 8 && op->cmd.nbytes % 2) + return false; + + if (op->addr.nbytes && op->addr.buswidth == 8 && op->addr.nbytes % 2) + return false; + + if (op->dummy.nbytes && op->dummy.buswidth == 8 && op->dummy.nbytes % 2) + return false; + + if (op->data.dir != SPI_MEM_NO_DATA && + op->dummy.buswidth == 8 && op->data.nbytes % 2) + return false; + + return spi_mem_check_buswidth(slave, op); +} +EXPORT_SYMBOL_GPL(spi_mem_dtr_supports_op); + +bool spi_mem_default_supports_op(struct spi_slave *slave, + const struct spi_mem_op *op) +{ + if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) + return false; + + if (op->cmd.nbytes != 1) + return false; + + return spi_mem_check_buswidth(slave, op); +} EXPORT_SYMBOL_GPL(spi_mem_default_supports_op); /** @@ -270,8 +302,7 @@ int spi_mem_exec_op(struct spi_slave *slave, const struct spi_mem_op *op) } #ifndef __UBOOT__ - tmpbufsize = sizeof(op->cmd.opcode) + op->addr.nbytes + - op->dummy.nbytes; + tmpbufsize = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes; /* * Allocate a buffer to transmit the CMD, ADDR cycles with kmalloc() so @@ -286,7 +317,7 @@ int spi_mem_exec_op(struct spi_slave *slave, const struct spi_mem_op *op) tmpbuf[0] = op->cmd.opcode; xfers[xferpos].tx_buf = tmpbuf; - xfers[xferpos].len = sizeof(op->cmd.opcode); + xfers[xferpos].len = op->cmd.nbytes; xfers[xferpos].tx_nbits = op->cmd.buswidth; spi_message_add_tail(&xfers[xferpos], &msg); xferpos++; @@ -350,7 +381,7 @@ int spi_mem_exec_op(struct spi_slave *slave, const struct spi_mem_op *op) tx_buf = op->data.buf.out; } - op_len = sizeof(op->cmd.opcode) + op->addr.nbytes + op->dummy.nbytes; + op_len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes; /* * Avoid using malloc() here so that we can use this code in SPL where @@ -439,8 +470,7 @@ int spi_mem_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op) if (!ops->mem_ops || !ops->mem_ops->exec_op) { unsigned int len; - len = sizeof(op->cmd.opcode) + op->addr.nbytes + - op->dummy.nbytes; + len = op->cmd.nbytes + op->addr.nbytes + op->dummy.nbytes; if (slave->max_write_size && len > slave->max_write_size) return -EINVAL; |