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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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spi: bcm-qspi: Implement the spi_mem interface
The spi_mem interface is meant to replace the ->spi_flash_read() one. Implement the ->exec_op() method to ease removal of the old interface. Not that ->spi_flash_read() is now implemented as a wrapper around the new bcm_qspi_exec_mem_op() function so that we can easily get rid of it when ->spi_flash_read() is removed. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Kamal Dasu <kdasu.kdev@gmail.com> Tested-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Boris Brezillon
Mark Brown
parent
b5932f5c68
commit
5f195ee7d8
1 changed files with 111 additions and 79 deletions
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@ -30,6 +30,7 @@
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/spi-mem.h>
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#include <linux/sysfs.h>
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#include <linux/types.h>
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#include "spi-bcm-qspi.h"
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@ -215,10 +216,10 @@ struct bcm_qspi {
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int bspi_maj_rev;
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int bspi_min_rev;
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int bspi_enabled;
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struct spi_flash_read_message *bspi_rf_msg;
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u32 bspi_rf_msg_idx;
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u32 bspi_rf_msg_len;
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u32 bspi_rf_msg_status;
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const struct spi_mem_op *bspi_rf_op;
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u32 bspi_rf_op_idx;
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u32 bspi_rf_op_len;
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u32 bspi_rf_op_status;
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struct bcm_xfer_mode xfer_mode;
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u32 s3_strap_override_ctrl;
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bool bspi_mode;
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@ -313,26 +314,26 @@ static inline void bcm_qspi_bspi_lr_clear(struct bcm_qspi *qspi)
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static void bcm_qspi_bspi_lr_data_read(struct bcm_qspi *qspi)
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{
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u32 *buf = (u32 *)qspi->bspi_rf_msg->buf;
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u32 *buf = (u32 *)qspi->bspi_rf_op->data.buf.in;
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u32 data = 0;
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dev_dbg(&qspi->pdev->dev, "xfer %p rx %p rxlen %d\n", qspi->bspi_rf_msg,
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qspi->bspi_rf_msg->buf, qspi->bspi_rf_msg_len);
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dev_dbg(&qspi->pdev->dev, "xfer %p rx %p rxlen %d\n", qspi->bspi_rf_op,
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qspi->bspi_rf_op->data.buf.in, qspi->bspi_rf_op_len);
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while (!bcm_qspi_bspi_lr_is_fifo_empty(qspi)) {
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data = bcm_qspi_bspi_lr_read_fifo(qspi);
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if (likely(qspi->bspi_rf_msg_len >= 4) &&
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if (likely(qspi->bspi_rf_op_len >= 4) &&
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IS_ALIGNED((uintptr_t)buf, 4)) {
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buf[qspi->bspi_rf_msg_idx++] = data;
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qspi->bspi_rf_msg_len -= 4;
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buf[qspi->bspi_rf_op_idx++] = data;
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qspi->bspi_rf_op_len -= 4;
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} else {
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/* Read out remaining bytes, make sure*/
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u8 *cbuf = (u8 *)&buf[qspi->bspi_rf_msg_idx];
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u8 *cbuf = (u8 *)&buf[qspi->bspi_rf_op_idx];
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data = cpu_to_le32(data);
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while (qspi->bspi_rf_msg_len) {
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while (qspi->bspi_rf_op_len) {
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*cbuf++ = (u8)data;
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data >>= 8;
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qspi->bspi_rf_msg_len--;
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qspi->bspi_rf_op_len--;
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}
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}
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}
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@ -349,14 +350,12 @@ static void bcm_qspi_bspi_set_xfer_params(struct bcm_qspi *qspi, u8 cmd_byte,
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}
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static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi,
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struct spi_flash_read_message *msg,
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int hp)
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const struct spi_mem_op *op, int hp)
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{
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int bpc = 0, bpp = 0;
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u8 command = msg->read_opcode;
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int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE;
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int addrlen = msg->addr_width;
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int addr_nbits = msg->addr_nbits ? msg->addr_nbits : SPI_NBITS_SINGLE;
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u8 command = op->cmd.opcode;
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int width = op->cmd.buswidth ? op->cmd.buswidth : SPI_NBITS_SINGLE;
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int addrlen = op->addr.nbytes * 8;
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int flex_mode = 1;
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dev_dbg(&qspi->pdev->dev, "set flex mode w %x addrlen %x hp %d\n",
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@ -365,7 +364,7 @@ static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi,
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if (addrlen == BSPI_ADDRLEN_4BYTES)
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bpp = BSPI_BPP_ADDR_SELECT_MASK;
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bpp |= msg->dummy_bytes * (8/addr_nbits);
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bpp |= (op->dummy.nbytes * 8) / op->dummy.buswidth;
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switch (width) {
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case SPI_NBITS_SINGLE:
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@ -397,11 +396,10 @@ static int bcm_qspi_bspi_set_flex_mode(struct bcm_qspi *qspi,
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}
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static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi,
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struct spi_flash_read_message *msg,
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int hp)
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const struct spi_mem_op *op, int hp)
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{
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int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE;
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int addrlen = msg->addr_width;
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int width = op->data.buswidth ? op->data.buswidth : SPI_NBITS_SINGLE;
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int addrlen = op->addr.nbytes;
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u32 data = bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL);
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dev_dbg(&qspi->pdev->dev, "set override mode w %x addrlen %x hp %d\n",
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@ -437,17 +435,17 @@ static int bcm_qspi_bspi_set_override(struct bcm_qspi *qspi,
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/* set the override mode */
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data |= BSPI_STRAP_OVERRIDE_CTRL_OVERRIDE;
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bcm_qspi_write(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL, data);
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bcm_qspi_bspi_set_xfer_params(qspi, msg->read_opcode, 0, 0, 0);
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bcm_qspi_bspi_set_xfer_params(qspi, op->cmd.opcode, 0, 0, 0);
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return 0;
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}
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static int bcm_qspi_bspi_set_mode(struct bcm_qspi *qspi,
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struct spi_flash_read_message *msg, int hp)
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const struct spi_mem_op *op, int hp)
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{
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int error = 0;
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int width = msg->data_nbits ? msg->data_nbits : SPI_NBITS_SINGLE;
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int addrlen = msg->addr_width;
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int width = op->data.buswidth ? op->data.buswidth : SPI_NBITS_SINGLE;
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int addrlen = op->addr.nbytes;
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/* default mode */
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qspi->xfer_mode.flex_mode = true;
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@ -460,12 +458,12 @@ static int bcm_qspi_bspi_set_mode(struct bcm_qspi *qspi,
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if (val & mask || qspi->s3_strap_override_ctrl & mask) {
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qspi->xfer_mode.flex_mode = false;
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bcm_qspi_write(qspi, BSPI, BSPI_FLEX_MODE_ENABLE, 0);
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error = bcm_qspi_bspi_set_override(qspi, msg, hp);
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error = bcm_qspi_bspi_set_override(qspi, op, hp);
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}
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}
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if (qspi->xfer_mode.flex_mode)
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error = bcm_qspi_bspi_set_flex_mode(qspi, msg, hp);
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error = bcm_qspi_bspi_set_flex_mode(qspi, op, hp);
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if (error) {
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dev_warn(&qspi->pdev->dev,
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@ -794,19 +792,20 @@ static int write_to_hw(struct bcm_qspi *qspi, struct spi_device *spi)
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return slot;
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}
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static int bcm_qspi_bspi_flash_read(struct spi_device *spi,
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struct spi_flash_read_message *msg)
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static int bcm_qspi_bspi_exec_mem_op(struct spi_device *spi,
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const struct spi_mem_op *op)
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{
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struct bcm_qspi *qspi = spi_master_get_devdata(spi->master);
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u32 addr = 0, len, rdlen, len_words;
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u32 addr = 0, len, rdlen, len_words, from = 0;
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int ret = 0;
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unsigned long timeo = msecs_to_jiffies(100);
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struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
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if (bcm_qspi_bspi_ver_three(qspi))
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if (msg->addr_width == BSPI_ADDRLEN_4BYTES)
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if (op->addr.nbytes == BSPI_ADDRLEN_4BYTES)
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return -EIO;
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from = op->addr.val;
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bcm_qspi_chip_select(qspi, spi->chip_select);
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bcm_qspi_write(qspi, MSPI, MSPI_WRITE_LOCK, 0);
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@ -815,15 +814,15 @@ static int bcm_qspi_bspi_flash_read(struct spi_device *spi,
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* the upper address byte to bspi
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*/
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if (bcm_qspi_bspi_ver_three(qspi) == false) {
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addr = msg->from & 0xff000000;
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addr = from & 0xff000000;
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bcm_qspi_write(qspi, BSPI,
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BSPI_BSPI_FLASH_UPPER_ADDR_BYTE, addr);
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}
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if (!qspi->xfer_mode.flex_mode)
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addr = msg->from;
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addr = from;
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else
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addr = msg->from & 0x00ffffff;
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addr = from & 0x00ffffff;
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if (bcm_qspi_bspi_ver_three(qspi) == true)
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addr = (addr + 0xc00000) & 0xffffff;
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@ -832,8 +831,8 @@ static int bcm_qspi_bspi_flash_read(struct spi_device *spi,
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* read into the entire buffer by breaking the reads
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* into RAF buffer read lengths
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*/
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len = msg->len;
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qspi->bspi_rf_msg_idx = 0;
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len = op->data.nbytes;
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qspi->bspi_rf_op_idx = 0;
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do {
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if (len > BSPI_READ_LENGTH)
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@ -844,9 +843,9 @@ static int bcm_qspi_bspi_flash_read(struct spi_device *spi,
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reinit_completion(&qspi->bspi_done);
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bcm_qspi_enable_bspi(qspi);
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len_words = (rdlen + 3) >> 2;
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qspi->bspi_rf_msg = msg;
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qspi->bspi_rf_msg_status = 0;
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qspi->bspi_rf_msg_len = rdlen;
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qspi->bspi_rf_op = op;
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qspi->bspi_rf_op_status = 0;
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qspi->bspi_rf_op_len = rdlen;
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dev_dbg(&qspi->pdev->dev,
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"bspi xfr addr 0x%x len 0x%x", addr, rdlen);
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bcm_qspi_write(qspi, BSPI, BSPI_RAF_START_ADDR, addr);
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@ -871,7 +870,6 @@ static int bcm_qspi_bspi_flash_read(struct spi_device *spi,
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}
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/* set msg return length */
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msg->retlen += rdlen;
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addr += rdlen;
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len -= rdlen;
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} while (len);
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@ -906,61 +904,62 @@ static int bcm_qspi_transfer_one(struct spi_master *master,
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return 0;
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}
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static int bcm_qspi_mspi_flash_read(struct spi_device *spi,
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struct spi_flash_read_message *msg)
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static int bcm_qspi_mspi_exec_mem_op(struct spi_device *spi,
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const struct spi_mem_op *op)
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{
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struct bcm_qspi *qspi = spi_master_get_devdata(spi->master);
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struct spi_master *master = spi->master;
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struct bcm_qspi *qspi = spi_master_get_devdata(master);
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struct spi_transfer t[2];
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u8 cmd[6];
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int ret;
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u8 cmd[6] = { };
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int ret, i;
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memset(cmd, 0, sizeof(cmd));
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memset(t, 0, sizeof(t));
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/* tx */
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/* opcode is in cmd[0] */
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cmd[0] = msg->read_opcode;
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cmd[1] = msg->from >> (msg->addr_width * 8 - 8);
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cmd[2] = msg->from >> (msg->addr_width * 8 - 16);
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cmd[3] = msg->from >> (msg->addr_width * 8 - 24);
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cmd[4] = msg->from >> (msg->addr_width * 8 - 32);
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cmd[0] = op->cmd.opcode;
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for (i = 0; i < op->addr.nbytes; i++)
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cmd[1 + i] = op->addr.val >> (8 * (op->addr.nbytes - i - 1));
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t[0].tx_buf = cmd;
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t[0].len = msg->addr_width + msg->dummy_bytes + 1;
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t[0].len = op->addr.nbytes + op->dummy.nbytes + 1;
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t[0].bits_per_word = spi->bits_per_word;
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t[0].tx_nbits = msg->opcode_nbits;
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t[0].tx_nbits = op->cmd.buswidth;
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/* lets mspi know that this is not last transfer */
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qspi->trans_pos.mspi_last_trans = false;
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ret = bcm_qspi_transfer_one(spi->master, spi, &t[0]);
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ret = bcm_qspi_transfer_one(master, spi, &t[0]);
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/* rx */
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qspi->trans_pos.mspi_last_trans = true;
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if (!ret) {
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/* rx */
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t[1].rx_buf = msg->buf;
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t[1].len = msg->len;
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t[1].rx_nbits = msg->data_nbits;
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t[1].rx_buf = op->data.buf.in;
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t[1].len = op->data.nbytes;
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t[1].rx_nbits = op->data.buswidth;
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t[1].bits_per_word = spi->bits_per_word;
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ret = bcm_qspi_transfer_one(spi->master, spi, &t[1]);
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ret = bcm_qspi_transfer_one(master, spi, &t[1]);
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}
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if (!ret)
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msg->retlen = msg->len;
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return ret;
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}
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static int bcm_qspi_flash_read(struct spi_device *spi,
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struct spi_flash_read_message *msg)
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static int bcm_qspi_exec_mem_op(struct spi_device *spi,
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const struct spi_mem_op *op)
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{
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struct bcm_qspi *qspi = spi_master_get_devdata(spi->master);
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int ret = 0;
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bool mspi_read = false;
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u32 addr, len;
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u32 addr = 0, len;
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u_char *buf;
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buf = msg->buf;
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addr = msg->from;
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len = msg->len;
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if (!op->data.nbytes || !op->addr.nbytes || op->addr.nbytes > 4 ||
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op->data.dir != SPI_MEM_DATA_IN)
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return -ENOTSUPP;
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buf = op->data.buf.in;
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addr = op->addr.val;
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len = op->data.nbytes;
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if (bcm_qspi_bspi_ver_three(qspi) == true) {
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/*
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@ -982,12 +981,40 @@ static int bcm_qspi_flash_read(struct spi_device *spi,
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mspi_read = true;
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if (mspi_read)
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return bcm_qspi_mspi_flash_read(spi, msg);
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return bcm_qspi_mspi_exec_mem_op(spi, op);
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ret = bcm_qspi_bspi_set_mode(qspi, msg, -1);
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ret = bcm_qspi_bspi_set_mode(qspi, op, -1);
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if (!ret)
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ret = bcm_qspi_bspi_flash_read(spi, msg);
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ret = bcm_qspi_bspi_exec_mem_op(spi, op);
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return ret;
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}
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static int bcm_qspi_exec_mem_op_wrapper(struct spi_mem *mem,
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const struct spi_mem_op *op)
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{
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return bcm_qspi_exec_mem_op(mem->spi, op);
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}
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static int bcm_qspi_flash_read_wrapper(struct spi_device *spi,
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struct spi_flash_read_message *msg)
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{
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int ret;
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struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(msg->read_opcode, 1),
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SPI_MEM_OP_ADDR(msg->addr_width,
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msg->from,
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msg->addr_nbits),
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SPI_MEM_OP_DUMMY(msg->dummy_bytes,
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msg->addr_nbits),
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SPI_MEM_OP_DATA_IN(msg->len,
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msg->buf,
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msg->data_nbits));
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msg->retlen = 0;
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ret = bcm_qspi_exec_mem_op(spi, &op);
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if (!ret)
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msg->retlen = msg->len;
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return ret;
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}
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@ -1026,10 +1053,10 @@ static irqreturn_t bcm_qspi_bspi_lr_l2_isr(int irq, void *dev_id)
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struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
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u32 status = qspi_dev_id->irqp->mask;
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if (qspi->bspi_enabled && qspi->bspi_rf_msg) {
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if (qspi->bspi_enabled && qspi->bspi_rf_op) {
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bcm_qspi_bspi_lr_data_read(qspi);
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if (qspi->bspi_rf_msg_len == 0) {
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qspi->bspi_rf_msg = NULL;
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if (qspi->bspi_rf_op_len == 0) {
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qspi->bspi_rf_op = NULL;
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if (qspi->soc_intc) {
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/* disable soc BSPI interrupt */
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soc_intc->bcm_qspi_int_set(soc_intc, BSPI_DONE,
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@ -1038,7 +1065,7 @@ static irqreturn_t bcm_qspi_bspi_lr_l2_isr(int irq, void *dev_id)
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status = INTR_BSPI_LR_SESSION_DONE_MASK;
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}
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if (qspi->bspi_rf_msg_status)
|
||||
if (qspi->bspi_rf_op_status)
|
||||
bcm_qspi_bspi_lr_clear(qspi);
|
||||
else
|
||||
bcm_qspi_bspi_flush_prefetch_buffers(qspi);
|
||||
|
|
@ -1050,7 +1077,7 @@ static irqreturn_t bcm_qspi_bspi_lr_l2_isr(int irq, void *dev_id)
|
|||
}
|
||||
|
||||
status &= INTR_BSPI_LR_SESSION_DONE_MASK;
|
||||
if (qspi->bspi_enabled && status && qspi->bspi_rf_msg_len == 0)
|
||||
if (qspi->bspi_enabled && status && qspi->bspi_rf_op_len == 0)
|
||||
complete(&qspi->bspi_done);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
|
|
@ -1063,7 +1090,7 @@ static irqreturn_t bcm_qspi_bspi_lr_err_l2_isr(int irq, void *dev_id)
|
|||
struct bcm_qspi_soc_intc *soc_intc = qspi->soc_intc;
|
||||
|
||||
dev_err(&qspi->pdev->dev, "BSPI INT error\n");
|
||||
qspi->bspi_rf_msg_status = -EIO;
|
||||
qspi->bspi_rf_op_status = -EIO;
|
||||
if (qspi->soc_intc)
|
||||
/* clear soc interrupt */
|
||||
soc_intc->bcm_qspi_int_ack(soc_intc, BSPI_ERR);
|
||||
|
|
@ -1186,6 +1213,10 @@ static void bcm_qspi_hw_uninit(struct bcm_qspi *qspi)
|
|||
|
||||
}
|
||||
|
||||
static const struct spi_controller_mem_ops bcm_qspi_mem_ops = {
|
||||
.exec_op = bcm_qspi_exec_mem_op_wrapper,
|
||||
};
|
||||
|
||||
static const struct of_device_id bcm_qspi_of_match[] = {
|
||||
{ .compatible = "brcm,spi-bcm-qspi" },
|
||||
{},
|
||||
|
|
@ -1228,7 +1259,8 @@ int bcm_qspi_probe(struct platform_device *pdev,
|
|||
master->mode_bits = SPI_CPHA | SPI_CPOL | SPI_RX_DUAL | SPI_RX_QUAD;
|
||||
master->setup = bcm_qspi_setup;
|
||||
master->transfer_one = bcm_qspi_transfer_one;
|
||||
master->spi_flash_read = bcm_qspi_flash_read;
|
||||
master->spi_flash_read = bcm_qspi_flash_read_wrapper;
|
||||
master->mem_ops = &bcm_qspi_mem_ops;
|
||||
master->cleanup = bcm_qspi_cleanup;
|
||||
master->dev.of_node = dev->of_node;
|
||||
master->num_chipselect = NUM_CHIPSELECT;
|
||||
|
|
|
|||
Loading…
Reference in a new issue