Merge tag 'spi-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "With the exception of some refactoring to fix long standing issues
  where we weren't handling cache syncs properly for messages which had
  PIO and DMA transfers going to the same page correctly there has been
  no work on the core this time around, and it's also been quite a quiet
  release for the drivers too:

   - Fix cache syncs for cases where we have DMA and PIO transfers in
     the same message going to the same page

   - Update the fsl_spi driver to use transfer_one() rather than a
     custom transfer function

   - Support for configuring transfer speeds with the AMD SPI controller

   - Support for a second chip select and 64K erase on Intel SPI

   - Support for Microchip coreQSPI, Nuvoton NPCM845, NXP i.MX93, and
     Rockchip RK3128 and RK3588"

* tag 'spi-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (73 commits)
  spi: Ensure that sg_table won't be used after being freed
  spi: spi-gxp: Use devm_platform_ioremap_resource()
  spi: s3c64xx: Fix large transfers with DMA
  spi: Split transfers larger than max size
  spi: Fix cache corruption due to DMA/PIO overlap
  spi: Save current RX and TX DMA devices
  spi: mt65xx: Add dma max segment size declaration
  spi: migrate mt7621 text bindings to YAML
  spi: renesas,sh-msiof: Add r8a779g0 support
  spi: spi-fsl-qspi: Use devm_platform_ioremap_resource_byname()
  spi: spi-fsl-lpspi: Use devm_platform_get_and_ioremap_resource()
  spi: spi-fsl-dspi: Use devm_platform_get_and_ioremap_resource()
  spi/omap100k:Fix PM disable depth imbalance in omap1_spi100k_probe
  spi: dw: Fix PM disable depth imbalance in dw_spi_bt1_probe
  spi: cadence-quadspi: Fix PM disable depth imbalance in cqspi_probe
  spi: s3c24xx: Switch to use devm_spi_alloc_master()
  spi: xilinx: Switch to use devm_spi_alloc_master()
  spi: img-spfi: using pm_runtime_resume_and_get instead of pm_runtime_get_sync
  spi: aspeed: Remove redundant dev_err call
  spi: spi-mpc52xx: switch to using gpiod API
  ...

1 files changed, 148 insertions, 16 deletions

diff --git a/drivers/spi/spi-intel.c b/drivers/spi/spi-intel.c
index 66063687ae27..55f4ee2db002 100644
--- a/drivers/spi/spi-intel.c
+++ b/drivers/spi/spi-intel.c
@@ -116,6 +116,22 @@
 #define ERASE_64K_OPCODE_SHIFT		16
 #define ERASE_64K_OPCODE_MASK		(0xff << ERASE_OPCODE_SHIFT)
 
+/* Flash descriptor fields */
+#define FLVALSIG_MAGIC			0x0ff0a55a
+#define FLMAP0_NC_MASK			GENMASK(9, 8)
+#define FLMAP0_NC_SHIFT			8
+#define FLMAP0_FCBA_MASK		GENMASK(7, 0)
+
+#define FLCOMP_C0DEN_MASK		GENMASK(3, 0)
+#define FLCOMP_C0DEN_512K		0x00
+#define FLCOMP_C0DEN_1M			0x01
+#define FLCOMP_C0DEN_2M			0x02
+#define FLCOMP_C0DEN_4M			0x03
+#define FLCOMP_C0DEN_8M			0x04
+#define FLCOMP_C0DEN_16M		0x05
+#define FLCOMP_C0DEN_32M		0x06
+#define FLCOMP_C0DEN_64M		0x07
+
 #define INTEL_SPI_TIMEOUT		5000 /* ms */
 #define INTEL_SPI_FIFO_SZ		64
 
@@ -129,6 +145,7 @@
  * @master: Pointer to the SPI controller structure
  * @nregions: Maximum number of regions
  * @pr_num: Maximum number of protected range registers
+ * @chip0_size: Size of the first flash chip in bytes
  * @locked: Is SPI setting locked
  * @swseq_reg: Use SW sequencer in register reads/writes
  * @swseq_erase: Use SW sequencer in erase operation
@@ -146,6 +163,7 @@ struct intel_spi {
 	struct spi_controller *master;
 	size_t nregions;
 	size_t pr_num;
+	size_t chip0_size;
 	bool locked;
 	bool swseq_reg;
 	bool swseq_erase;
@@ -158,6 +176,7 @@ struct intel_spi_mem_op {
 	struct spi_mem_op mem_op;
 	u32 replacement_op;
 	int (*exec_op)(struct intel_spi *ispi,
+		       const struct spi_mem *mem,
 		       const struct intel_spi_mem_op *iop,
 		       const struct spi_mem_op *op);
 };
@@ -441,7 +460,16 @@ static int intel_spi_sw_cycle(struct intel_spi *ispi, u8 opcode, size_t len,
 	return 0;
 }
 
-static int intel_spi_read_reg(struct intel_spi *ispi,
+static u32 intel_spi_chip_addr(const struct intel_spi *ispi,
+			       const struct spi_mem *mem)
+{
+	/* Pick up the correct start address */
+	if (!mem)
+		return 0;
+	return mem->spi->chip_select == 1 ? ispi->chip0_size : 0;
+}
+
+static int intel_spi_read_reg(struct intel_spi *ispi, const struct spi_mem *mem,
 			      const struct intel_spi_mem_op *iop,
 			      const struct spi_mem_op *op)
 {
@@ -449,8 +477,7 @@ static int intel_spi_read_reg(struct intel_spi *ispi,
 	u8 opcode = op->cmd.opcode;
 	int ret;
 
-	/* Address of the first chip */
-	writel(0, ispi->base + FADDR);
+	writel(intel_spi_chip_addr(ispi, mem), ispi->base + FADDR);
 
 	if (ispi->swseq_reg)
 		ret = intel_spi_sw_cycle(ispi, opcode, nbytes,
@@ -464,7 +491,7 @@ static int intel_spi_read_reg(struct intel_spi *ispi,
 	return intel_spi_read_block(ispi, op->data.buf.in, nbytes);
 }
 
-static int intel_spi_write_reg(struct intel_spi *ispi,
+static int intel_spi_write_reg(struct intel_spi *ispi, const struct spi_mem *mem,
 			       const struct intel_spi_mem_op *iop,
 			       const struct spi_mem_op *op)
 {
@@ -511,7 +538,7 @@ static int intel_spi_write_reg(struct intel_spi *ispi,
 	if (opcode == SPINOR_OP_WRDI)
 		return 0;
 
-	writel(0, ispi->base + FADDR);
+	writel(intel_spi_chip_addr(ispi, mem), ispi->base + FADDR);
 
 	/* Write the value beforehand */
 	ret = intel_spi_write_block(ispi, op->data.buf.out, nbytes);
@@ -524,13 +551,13 @@ static int intel_spi_write_reg(struct intel_spi *ispi,
 	return intel_spi_hw_cycle(ispi, opcode, nbytes);
 }
 
-static int intel_spi_read(struct intel_spi *ispi,
+static int intel_spi_read(struct intel_spi *ispi, const struct spi_mem *mem,
 			  const struct intel_spi_mem_op *iop,
 			  const struct spi_mem_op *op)
 {
-	void *read_buf = op->data.buf.in;
+	u32 addr = intel_spi_chip_addr(ispi, mem) + op->addr.val;
 	size_t block_size, nbytes = op->data.nbytes;
-	u32 addr = op->addr.val;
+	void *read_buf = op->data.buf.in;
 	u32 val, status;
 	int ret;
 
@@ -585,13 +612,13 @@ static int intel_spi_read(struct intel_spi *ispi,
 	return 0;
 }
 
-static int intel_spi_write(struct intel_spi *ispi,
+static int intel_spi_write(struct intel_spi *ispi, const struct spi_mem *mem,
 			   const struct intel_spi_mem_op *iop,
 			   const struct spi_mem_op *op)
 {
+	u32 addr = intel_spi_chip_addr(ispi, mem) + op->addr.val;
 	size_t block_size, nbytes = op->data.nbytes;
 	const void *write_buf = op->data.buf.out;
-	u32 addr = op->addr.val;
 	u32 val, status;
 	int ret;
 
@@ -648,12 +675,12 @@ static int intel_spi_write(struct intel_spi *ispi,
 	return 0;
 }
 
-static int intel_spi_erase(struct intel_spi *ispi,
+static int intel_spi_erase(struct intel_spi *ispi, const struct spi_mem *mem,
 			   const struct intel_spi_mem_op *iop,
 			   const struct spi_mem_op *op)
 {
+	u32 addr = intel_spi_chip_addr(ispi, mem) + op->addr.val;
 	u8 opcode = op->cmd.opcode;
-	u32 addr = op->addr.val;
 	u32 val, status;
 	int ret;
 
@@ -765,7 +792,7 @@ static int intel_spi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *o
 	if (!iop)
 		return -EOPNOTSUPP;
 
-	return iop->exec_op(ispi, iop, op);
+	return iop->exec_op(ispi, mem, iop, op);
 }
 
 static const char *intel_spi_get_name(struct spi_mem *mem)
@@ -805,7 +832,7 @@ static ssize_t intel_spi_dirmap_read(struct spi_mem_dirmap_desc *desc, u64 offs,
 	op.data.nbytes = len;
 	op.data.buf.in = buf;
 
-	ret = iop->exec_op(ispi, iop, &op);
+	ret = iop->exec_op(ispi, desc->mem, iop, &op);
 	return ret ? ret : len;
 }
 
@@ -821,7 +848,7 @@ static ssize_t intel_spi_dirmap_write(struct spi_mem_dirmap_desc *desc, u64 offs
 	op.data.nbytes = len;
 	op.data.buf.out = buf;
 
-	ret = iop->exec_op(ispi, iop, &op);
+	ret = iop->exec_op(ispi, desc->mem, iop, &op);
 	return ret ? ret : len;
 }
 
@@ -1073,6 +1100,7 @@ static int intel_spi_init(struct intel_spi *ispi)
 		ispi->pregs = ispi->base + CNL_PR;
 		ispi->nregions = CNL_FREG_NUM;
 		ispi->pr_num = CNL_PR_NUM;
+		erase_64k = true;
 		break;
 
 	default:
@@ -1226,10 +1254,98 @@ static void intel_spi_fill_partition(struct intel_spi *ispi,
 	}
 }
 
+static int intel_spi_read_desc(struct intel_spi *ispi)
+{
+	struct spi_mem_op op =
+		SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_READ, 0),
+			   SPI_MEM_OP_ADDR(3, 0, 0),
+			   SPI_MEM_OP_NO_DUMMY,
+			   SPI_MEM_OP_DATA_IN(0, NULL, 0));
+	u32 buf[2], nc, fcba, flcomp;
+	ssize_t ret;
+
+	op.addr.val = 0x10;
+	op.data.buf.in = buf;
+	op.data.nbytes = sizeof(buf);
+
+	ret = intel_spi_read(ispi, NULL, NULL, &op);
+	if (ret) {
+		dev_warn(ispi->dev, "failed to read descriptor\n");
+		return ret;
+	}
+
+	dev_dbg(ispi->dev, "FLVALSIG=0x%08x\n", buf[0]);
+	dev_dbg(ispi->dev, "FLMAP0=0x%08x\n", buf[1]);
+
+	if (buf[0] != FLVALSIG_MAGIC) {
+		dev_warn(ispi->dev, "descriptor signature not valid\n");
+		return -ENODEV;
+	}
+
+	fcba = (buf[1] & FLMAP0_FCBA_MASK) << 4;
+	dev_dbg(ispi->dev, "FCBA=%#x\n", fcba);
+
+	op.addr.val = fcba;
+	op.data.buf.in = &flcomp;
+	op.data.nbytes = sizeof(flcomp);
+
+	ret = intel_spi_read(ispi, NULL, NULL, &op);
+	if (ret) {
+		dev_warn(ispi->dev, "failed to read FLCOMP\n");
+		return -ENODEV;
+	}
+
+	dev_dbg(ispi->dev, "FLCOMP=0x%08x\n", flcomp);
+
+	switch (flcomp & FLCOMP_C0DEN_MASK) {
+	case FLCOMP_C0DEN_512K:
+		ispi->chip0_size = SZ_512K;
+		break;
+	case FLCOMP_C0DEN_1M:
+		ispi->chip0_size = SZ_1M;
+		break;
+	case FLCOMP_C0DEN_2M:
+		ispi->chip0_size = SZ_2M;
+		break;
+	case FLCOMP_C0DEN_4M:
+		ispi->chip0_size = SZ_4M;
+		break;
+	case FLCOMP_C0DEN_8M:
+		ispi->chip0_size = SZ_8M;
+		break;
+	case FLCOMP_C0DEN_16M:
+		ispi->chip0_size = SZ_16M;
+		break;
+	case FLCOMP_C0DEN_32M:
+		ispi->chip0_size = SZ_32M;
+		break;
+	case FLCOMP_C0DEN_64M:
+		ispi->chip0_size = SZ_64M;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	dev_dbg(ispi->dev, "chip0 size %zd KB\n", ispi->chip0_size / SZ_1K);
+
+	nc = (buf[1] & FLMAP0_NC_MASK) >> FLMAP0_NC_SHIFT;
+	if (!nc)
+		ispi->master->num_chipselect = 1;
+	else if (nc == 1)
+		ispi->master->num_chipselect = 2;
+	else
+		return -EINVAL;
+
+	dev_dbg(ispi->dev, "%u flash components found\n",
+		ispi->master->num_chipselect);
+	return 0;
+}
+
 static int intel_spi_populate_chip(struct intel_spi *ispi)
 {
 	struct flash_platform_data *pdata;
 	struct spi_board_info chip;
+	int ret;
 
 	pdata = devm_kzalloc(ispi->dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
@@ -1247,7 +1363,23 @@ static int intel_spi_populate_chip(struct intel_spi *ispi)
 	snprintf(chip.modalias, 8, "spi-nor");
 	chip.platform_data = pdata;
 
-	return spi_new_device(ispi->master, &chip) ? 0 : -ENODEV;
+	if (!spi_new_device(ispi->master, &chip))
+		return -ENODEV;
+
+	/* Add the second chip if present */
+	if (ispi->master->num_chipselect < 2)
+		return 0;
+
+	ret = intel_spi_read_desc(ispi);
+	if (ret)
+		return ret;
+
+	chip.platform_data = NULL;
+	chip.chip_select = 1;
+
+	if (!spi_new_device(ispi->master, &chip))
+		return -ENODEV;
+	return 0;
 }
 
 /**