summaryrefslogtreecommitdiffstats
path: root/drivers/spi
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/Kconfig8
-rw-r--r--drivers/spi/Makefile1
-rw-r--r--drivers/spi/ca_sflash.c576
-rw-r--r--drivers/spi/designware_spi.c403
-rw-r--r--drivers/spi/spi-uclass.c51
5 files changed, 922 insertions, 117 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index f7a9852565..cd19b2d4b3 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -106,6 +106,14 @@ config BCMSTB_SPI
be used to access the SPI flash on platforms embedding this
Broadcom SPI core.
+config CORTINA_SFLASH
+ bool "Cortina-Access Serial Flash controller driver"
+ depends on DM_SPI && SPI_MEM
+ help
+ Enable the Cortina-Access Serial Flash controller driver. This driver
+ can be used to access the SPI NOR/NAND flash on platforms embedding this
+ Cortina-Access IP core.
+
config CADENCE_QSPI
bool "Cadence QSPI driver"
help
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index d9b5bd9b79..dc9ea34c0a 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_BCM63XX_HSSPI) += bcm63xx_hsspi.o
obj-$(CONFIG_BCM63XX_SPI) += bcm63xx_spi.o
obj-$(CONFIG_BCMSTB_SPI) += bcmstb_spi.o
obj-$(CONFIG_CF_SPI) += cf_spi.o
+obj-$(CONFIG_CORTINA_SFLASH) += ca_sflash.o
obj-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
obj-$(CONFIG_DESIGNWARE_SPI) += designware_spi.o
obj-$(CONFIG_EXYNOS_SPI) += exynos_spi.o
diff --git a/drivers/spi/ca_sflash.c b/drivers/spi/ca_sflash.c
new file mode 100644
index 0000000000..00af6bffa6
--- /dev/null
+++ b/drivers/spi/ca_sflash.c
@@ -0,0 +1,576 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for Cortina SPI-FLASH Controller
+ *
+ * Copyright (C) 2020 Cortina Access Inc. All Rights Reserved.
+ *
+ * Author: PengPeng Chen <pengpeng.chen@cortina-access.com>
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <clk.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <linux/compat.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/ioport.h>
+#include <linux/sizes.h>
+#include <spi.h>
+#include <spi-mem.h>
+#include <reset.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct ca_sflash_regs {
+ u32 idr; /* 0x00:Flash word ID Register */
+ u32 tc; /* 0x04:Flash Timeout Counter Register */
+ u32 sr; /* 0x08:Flash Status Register */
+ u32 tr; /* 0x0C:Flash Type Register */
+ u32 asr; /* 0x10:Flash ACCESS START/BUSY Register */
+ u32 isr; /* 0x14:Flash Interrupt Status Register */
+ u32 imr; /* 0x18:Flash Interrupt Mask Register */
+ u32 fcr; /* 0x1C:NAND Flash FIFO Control Register */
+ u32 ffsr; /* 0x20:Flash FIFO Status Register */
+ u32 ffar; /* 0x24:Flash FIFO ADDRESS Register */
+ u32 ffmar; /* 0x28:Flash FIFO MATCHING ADDRESS Register */
+ u32 ffdr; /* 0x2C:Flash FIFO Data Register */
+ u32 ar; /* 0x30:Serial Flash Access Register */
+ u32 ear; /* 0x34:Serial Flash Extend Access Register */
+ u32 adr; /* 0x38:Serial Flash ADdress Register */
+ u32 dr; /* 0x3C:Serial Flash Data Register */
+ u32 tmr; /* 0x40:Serial Flash Timing Register */
+};
+
+/*
+ * FLASH_TYPE
+ */
+#define CA_FLASH_TR_PIN BIT(15)
+#define CA_FLASH_TR_TYPE_MSK GENMASK(14, 12)
+#define CA_FLASH_TR_TYPE(tp) (((tp) << 12) & CA_FLASH_TR_TYPE_MSK)
+#define CA_FLASH_TR_WIDTH BIT(11)
+#define CA_FLASH_TR_SIZE_MSK GENMASK(10, 9)
+#define CA_FLASH_TR_SIZE(sz) (((sz) << 9) & CA_FLASH_TR_SIZE_MSK)
+
+/*
+ * FLASH_FLASH_ACCESS_START
+ */
+#define CA_FLASH_ASR_IND_START_EN BIT(1)
+#define CA_FLASH_ASR_DMA_START_EN BIT(3)
+#define CA_FLASH_ASR_WR_ACCESS_EN BIT(9)
+
+/*
+ * FLASH_FLASH_INTERRUPT
+ */
+#define CA_FLASH_ISR_REG_IRQ BIT(1)
+#define CA_FLASH_ISR_FIFO_IRQ BIT(2)
+
+/*
+ * FLASH_SF_ACCESS
+ */
+#define CA_SF_AR_OP_MSK GENMASK(7, 0)
+#define CA_SF_AR_OP(op) ((op) << 0 & CA_SF_AR_OP_MSK)
+#define CA_SF_AR_ACCODE_MSK GENMASK(11, 8)
+#define CA_SF_AR_ACCODE(ac) (((ac) << 8) & CA_SF_AR_ACCODE_MSK)
+#define CA_SF_AR_FORCE_TERM BIT(12)
+#define CA_SF_AR_FORCE_BURST BIT(13)
+#define CA_SF_AR_AUTO_MODE_EN BIT(15)
+#define CA_SF_AR_CHIP_EN_ALT BIT(16)
+#define CA_SF_AR_HI_SPEED_RD BIT(17)
+#define CA_SF_AR_MIO_INF_DC BIT(24)
+#define CA_SF_AR_MIO_INF_AC BIT(25)
+#define CA_SF_AR_MIO_INF_CC BIT(26)
+#define CA_SF_AR_DDR_MSK GENMASK(29, 28)
+#define CA_SF_AR_DDR(ddr) (((ddr) << 28) & CA_SF_AR_DDR_MSK)
+#define CA_SF_AR_MIO_INF_MSK GENMASK(31, 30)
+#define CA_SF_AR_MIO_INF(io) (((io) << 30) & CA_SF_AR_MIO_INF_MSK)
+
+/*
+ * FLASH_SF_EXT_ACCESS
+ */
+#define CA_SF_EAR_OP_MSK GENMASK(7, 0)
+#define CA_SF_EAR_OP(op) (((op) << 0) & CA_SF_EAR_OP_MSK)
+#define CA_SF_EAR_DATA_CNT_MSK GENMASK(20, 8)
+#define CA_SF_EAR_DATA_CNT(cnt) (((cnt) << 8) & CA_SF_EAR_DATA_CNT_MSK)
+#define CA_SF_EAR_DATA_CNT_MAX (4096)
+#define CA_SF_EAR_ADDR_CNT_MSK GENMASK(23, 21)
+#define CA_SF_EAR_ADDR_CNT(cnt) (((cnt) << 21) & CA_SF_EAR_ADDR_CNT_MSK)
+#define CA_SF_EAR_ADDR_CNT_MAX (5)
+#define CA_SF_EAR_DUMY_CNT_MSK GENMASK(29, 24)
+#define CA_SF_EAR_DUMY_CNT(cnt) (((cnt) << 24) & CA_SF_EAR_DUMY_CNT_MSK)
+#define CA_SF_EAR_DUMY_CNT_MAX (32)
+#define CA_SF_EAR_DRD_CMD_EN BIT(31)
+
+/*
+ * FLASH_SF_ADDRESS
+ */
+#define CA_SF_ADR_REG_MSK GENMASK(31, 0)
+#define CA_SF_ADR_REG(addr) (((addr) << 0) & CA_SF_ADR_REG_MSK)
+
+/*
+ * FLASH_SF_DATA
+ */
+#define CA_SF_DR_REG_MSK GENMASK(31, 0)
+#define CA_SF_DR_REG(addr) (((addr) << 0) & CA_SF_DR_REG_MSK)
+
+/*
+ * FLASH_SF_TIMING
+ */
+#define CA_SF_TMR_IDLE_MSK GENMASK(7, 0)
+#define CA_SF_TMR_IDLE(idle) (((idle) << 0) & CA_SF_TMR_IDLE_MSK)
+#define CA_SF_TMR_HOLD_MSK GENMASK(15, 8)
+#define CA_SF_TMR_HOLD(hold) (((hold) << 8) & CA_SF_TMR_HOLD_MSK)
+#define CA_SF_TMR_SETUP_MSK GENMASK(23, 16)
+#define CA_SF_TMR_SETUP(setup) (((setup) << 16) & CA_SF_TMR_SETUP_MSK)
+#define CA_SF_TMR_CLK_MSK GENMASK(26, 24)
+#define CA_SF_TMR_CLK(clk) (((clk) << 24) & CA_SF_TMR_CLK_MSK)
+
+#define CA_SFLASH_IND_WRITE 0
+#define CA_SFLASH_IND_READ 1
+#define CA_SFLASH_MEM_MAP 3
+#define CA_SFLASH_FIFO_TIMEOUT_US 30000
+#define CA_SFLASH_BUSY_TIMEOUT_US 40000
+
+#define CA_SF_AC_OP 0x00
+#define CA_SF_AC_OP_1_DATA 0x01
+#define CA_SF_AC_OP_2_DATA 0x02
+#define CA_SF_AC_OP_3_DATA 0x03
+#define CA_SF_AC_OP_4_DATA 0x04
+#define CA_SF_AC_OP_3_ADDR 0x05
+#define CA_SF_AC_OP_4_ADDR (CA_SF_AC_OP_3_ADDR)
+#define CA_SF_AC_OP_3_ADDR_1_DATA 0x06
+#define CA_SF_AC_OP_4_ADDR_1_DATA (CA_SF_AC_OP_3_ADDR_1_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_2_DATA 0x07
+#define CA_SF_AC_OP_4_ADDR_2_DATA (CA_SF_AC_OP_3_ADDR_2_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_3_DATA 0x08
+#define CA_SF_AC_OP_4_ADDR_3_DATA (CA_SF_AC_OP_3_ADDR_3_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_4_DATA 0x09
+#define CA_SF_AC_OP_4_ADDR_4_DATA (CA_SF_AC_OP_3_ADDR_4_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_X_1_DATA 0x0A
+#define CA_SF_AC_OP_4_ADDR_X_1_DATA (CA_SF_AC_OP_3_ADDR_X_1_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_X_2_DATA 0x0B
+#define CA_SF_AC_OP_4_ADDR_X_2_DATA (CA_SF_AC_OP_3_ADDR_X_2_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_X_3_DATA 0x0C
+#define CA_SF_AC_OP_4_ADDR_X_3_DATA (CA_SF_AC_OP_3_ADDR_X_3_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_X_4_DATA 0x0D
+#define CA_SF_AC_OP_4_ADDR_X_4_DATA (CA_SF_AC_OP_3_ADDR_X_4_DATA << 2)
+#define CA_SF_AC_OP_3_ADDR_4X_1_DATA 0x0E
+#define CA_SF_AC_OP_4_ADDR_4X_1_DATA (CA_SF_AC_OP_3_ADDR_4X_1_DATA << 2)
+#define CA_SF_AC_OP_EXTEND 0x0F
+
+#define CA_SF_ACCESS_MIO_SINGLE 0
+#define CA_SF_ACCESS_MIO_DUAL 1
+#define CA_SF_ACCESS_MIO_QUARD 2
+
+enum access_type {
+ RD_ACCESS,
+ WR_ACCESS,
+};
+
+struct ca_sflash_priv {
+ struct ca_sflash_regs *regs;
+ u8 rx_width;
+ u8 tx_width;
+};
+
+/*
+ * This function doesn't do anything except help with debugging
+ */
+static int ca_sflash_claim_bus(struct udevice *dev)
+{
+ debug("%s:\n", __func__);
+ return 0;
+}
+
+static int ca_sflash_release_bus(struct udevice *dev)
+{
+ debug("%s:\n", __func__);
+ return 0;
+}
+
+static int ca_sflash_set_speed(struct udevice *dev, uint speed)
+{
+ debug("%s:\n", __func__);
+ return 0;
+}
+
+static int ca_sflash_set_mode(struct udevice *dev, uint mode)
+{
+ struct ca_sflash_priv *priv = dev_get_priv(dev);
+
+ if (mode & SPI_RX_QUAD)
+ priv->rx_width = 4;
+ else if (mode & SPI_RX_DUAL)
+ priv->rx_width = 2;
+ else
+ priv->rx_width = 1;
+
+ if (mode & SPI_TX_QUAD)
+ priv->tx_width = 4;
+ else if (mode & SPI_TX_DUAL)
+ priv->tx_width = 2;
+ else
+ priv->tx_width = 1;
+
+ debug("%s: mode=%d, rx_width=%d, tx_width=%d\n",
+ __func__, mode, priv->rx_width, priv->tx_width);
+
+ return 0;
+}
+
+static int _ca_sflash_wait_for_not_busy(struct ca_sflash_priv *priv)
+{
+ u32 asr;
+
+ if (readl_poll_timeout(&priv->regs->asr, asr,
+ !(asr & CA_FLASH_ASR_IND_START_EN),
+ CA_SFLASH_BUSY_TIMEOUT_US)) {
+ pr_err("busy timeout (stat:%#x)\n", asr);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_wait_cmd(struct ca_sflash_priv *priv,
+ enum access_type type)
+{
+ if (type == WR_ACCESS) {
+ /* Enable write access and start the sflash indirect access */
+ clrsetbits_le32(&priv->regs->asr, GENMASK(31, 0),
+ CA_FLASH_ASR_WR_ACCESS_EN
+ | CA_FLASH_ASR_IND_START_EN);
+ } else if (type == RD_ACCESS) {
+ /* Start the sflash indirect access */
+ clrsetbits_le32(&priv->regs->asr, GENMASK(31, 0),
+ CA_FLASH_ASR_IND_START_EN);
+ } else {
+ printf("%s: !error access type.\n", __func__);
+ return -1;
+ }
+
+ /* Wait til the action(rd/wr) completed */
+ return _ca_sflash_wait_for_not_busy(priv);
+}
+
+static int _ca_sflash_read(struct ca_sflash_priv *priv,
+ u8 *buf, unsigned int data_len)
+{
+ u32 reg_data;
+ int len;
+
+ len = data_len;
+ while (len >= 4) {
+ if (_ca_sflash_wait_cmd(priv, RD_ACCESS))
+ return -1;
+ reg_data = readl(&priv->regs->dr);
+ *buf++ = reg_data & 0xFF;
+ *buf++ = (reg_data >> 8) & 0xFF;
+ *buf++ = (reg_data >> 16) & 0xFF;
+ *buf++ = (reg_data >> 24) & 0xFF;
+ len -= 4;
+ debug("%s: reg_data=%#08x\n",
+ __func__, reg_data);
+ }
+
+ if (len > 0) {
+ if (_ca_sflash_wait_cmd(priv, RD_ACCESS))
+ return -1;
+ reg_data = readl(&priv->regs->dr);
+ debug("%s: reg_data=%#08x\n",
+ __func__, reg_data);
+ }
+
+ switch (len) {
+ case 3:
+ *buf++ = reg_data & 0xFF;
+ *buf++ = (reg_data >> 8) & 0xFF;
+ *buf++ = (reg_data >> 16) & 0xFF;
+ break;
+ case 2:
+ *buf++ = reg_data & 0xFF;
+ *buf++ = (reg_data >> 8) & 0xFF;
+ break;
+ case 1:
+ *buf++ = reg_data & 0xFF;
+ break;
+ case 0:
+ break;
+ default:
+ printf("%s: error data_length %d!\n", __func__, len);
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_mio_set(struct ca_sflash_priv *priv,
+ u8 width)
+{
+ if (width == 4) {
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_MIO_INF_DC
+ | CA_SF_AR_MIO_INF(CA_SF_ACCESS_MIO_QUARD)
+ | CA_SF_AR_FORCE_BURST);
+ } else if (width == 2) {
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_MIO_INF_DC
+ | CA_SF_AR_MIO_INF(CA_SF_ACCESS_MIO_DUAL)
+ | CA_SF_AR_FORCE_BURST);
+ } else if (width == 1) {
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_MIO_INF(CA_SF_ACCESS_MIO_SINGLE)
+ | CA_SF_AR_FORCE_BURST);
+ } else {
+ printf("%s: error rx/tx width %d!\n", __func__, width);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_write(struct ca_sflash_priv *priv,
+ u8 *buf, unsigned int data_len)
+{
+ u32 reg_data;
+ int len;
+
+ len = data_len;
+ while (len > 0) {
+ reg_data = buf[0]
+ | (buf[1] << 8)
+ | (buf[2] << 16)
+ | (buf[3] << 24);
+
+ debug("%s: reg_data=%#08x\n",
+ __func__, reg_data);
+ /* Fill data */
+ clrsetbits_le32(&priv->regs->dr, GENMASK(31, 0), reg_data);
+
+ if (_ca_sflash_wait_cmd(priv, WR_ACCESS))
+ return -1;
+
+ len -= 4;
+ buf += 4;
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_access_data(struct ca_sflash_priv *priv,
+ struct spi_mem_op *op)
+{
+ int total_cnt;
+ unsigned int len;
+ unsigned int data_cnt = op->data.nbytes;
+ u64 addr_offset = op->addr.val;
+ u8 addr_cnt = op->addr.nbytes;
+ u8 *data_buf = NULL;
+ u8 *buf = NULL;
+
+ if (op->data.dir == SPI_MEM_DATA_IN)
+ data_buf = (u8 *)op->data.buf.in;
+ else
+ data_buf = (u8 *)op->data.buf.out;
+
+ if (data_cnt > CA_SF_EAR_DATA_CNT_MAX)
+ buf = malloc(CA_SF_EAR_DATA_CNT_MAX);
+ else
+ buf = malloc(data_cnt);
+
+ total_cnt = data_cnt;
+ while (total_cnt > 0) {
+ /* Fill address */
+ if (addr_cnt > 0)
+ clrsetbits_le32(&priv->regs->adr,
+ GENMASK(31, 0), (u32)addr_offset);
+
+ if (total_cnt > CA_SF_EAR_DATA_CNT_MAX) {
+ len = CA_SF_EAR_DATA_CNT_MAX;
+ addr_offset += CA_SF_EAR_DATA_CNT_MAX;
+ /* Clear start bit before next bulk read */
+ clrbits_le32(&priv->regs->asr, GENMASK(31, 0));
+ } else {
+ len = total_cnt;
+ }
+
+ memset(buf, 0, len);
+ if (op->data.dir == SPI_MEM_DATA_IN) {
+ if (_ca_sflash_read(priv, buf, len))
+ break;
+ memcpy(data_buf, buf, len);
+ } else {
+ memcpy(buf, data_buf, len);
+ if (_ca_sflash_write(priv, buf, len))
+ break;
+ }
+
+ total_cnt -= len;
+ data_buf += len;
+ }
+ if (buf)
+ free(buf);
+
+ return total_cnt > 0 ? -1 : 0;
+}
+
+static int _ca_sflash_issue_cmd(struct ca_sflash_priv *priv,
+ struct spi_mem_op *op, u8 opcode)
+{
+ u8 dummy_cnt = op->dummy.nbytes;
+ u8 addr_cnt = op->addr.nbytes;
+ u8 mio_width;
+ unsigned int data_cnt = op->data.nbytes;
+ u64 addr_offset = op->addr.val;
+
+ /* Set the access register */
+ clrsetbits_le32(&priv->regs->ar,
+ GENMASK(31, 0), CA_SF_AR_ACCODE(opcode));
+
+ if (opcode == CA_SF_AC_OP_EXTEND) { /* read_data, write_data */
+ if (data_cnt > 6) {
+ if (op->data.dir == SPI_MEM_DATA_IN)
+ mio_width = priv->rx_width;
+ else
+ mio_width = priv->tx_width;
+ if (_ca_sflash_mio_set(priv, mio_width))
+ return -1;
+ }
+ debug("%s: FLASH ACCESS reg=%#08x\n",
+ __func__, readl(&priv->regs->ar));
+
+ /* Use command in extend_access register */
+ clrsetbits_le32(&priv->regs->ear,
+ GENMASK(31, 0), CA_SF_EAR_OP(op->cmd.opcode)
+ | CA_SF_EAR_DUMY_CNT(dummy_cnt * 8 - 1)
+ | CA_SF_EAR_ADDR_CNT(addr_cnt - 1)
+ | CA_SF_EAR_DATA_CNT(4 - 1)
+ | CA_SF_EAR_DRD_CMD_EN);
+ debug("%s: FLASH EXT ACCESS reg=%#08x\n",
+ __func__, readl(&priv->regs->ear));
+
+ if (_ca_sflash_access_data(priv, op))
+ return -1;
+ } else { /* reset_op, wr_enable, wr_disable */
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_OP(op->cmd.opcode));
+ debug("%s: FLASH ACCESS reg=%#08x\n",
+ __func__, readl(&priv->regs->ar));
+
+ if (opcode == CA_SF_AC_OP_4_ADDR) { /* erase_op */
+ /* Configure address length */
+ if (addr_cnt > 3) /* 4 Bytes address */
+ setbits_le32(&priv->regs->tr,
+ CA_FLASH_TR_SIZE(2));
+ else /* 3 Bytes address */
+ clrbits_le32(&priv->regs->tr,
+ CA_FLASH_TR_SIZE_MSK);
+
+ /* Fill address */
+ if (addr_cnt > 0)
+ clrsetbits_le32(&priv->regs->adr,
+ GENMASK(31, 0),
+ (u32)addr_offset);
+ }
+
+ if (_ca_sflash_wait_cmd(priv, RD_ACCESS))
+ return -1;
+ }
+ /* elapse 10us before issuing any other command */
+ udelay(10);
+
+ return 0;
+}
+
+static int ca_sflash_exec_op(struct spi_slave *slave,
+ const struct spi_mem_op *op)
+{
+ struct ca_sflash_priv *priv = dev_get_priv(slave->dev->parent);
+ u8 opcode;
+
+ debug("%s: cmd:%#02x addr.val:%#llx addr.len:%#x data.len:%#x data.dir:%#x\n",
+ __func__, op->cmd.opcode, op->addr.val,
+ op->addr.nbytes, op->data.nbytes, op->data.dir);
+
+ if (op->data.nbytes == 0 && op->addr.nbytes == 0) {
+ opcode = CA_SF_AC_OP;
+ } else if (op->data.nbytes == 0 && op->addr.nbytes > 0) {
+ opcode = CA_SF_AC_OP_4_ADDR;
+ } else if (op->data.nbytes > 0) {
+ opcode = CA_SF_AC_OP_EXTEND;
+ } else {
+ printf("%s: can't support cmd.opcode:(%#02x) type currently!\n",
+ __func__, op->cmd.opcode);
+ return -1;
+ }
+
+ return _ca_sflash_issue_cmd(priv, (struct spi_mem_op *)op, opcode);
+}
+
+static void ca_sflash_init(struct ca_sflash_priv *priv)
+{
+ /* Set FLASH_TYPE as serial flash, value: 0x0400*/
+ clrsetbits_le32(&priv->regs->tr,
+ GENMASK(31, 0), CA_FLASH_TR_SIZE(2));
+ debug("%s: FLASH_TYPE reg=%#x\n",
+ __func__, readl(&priv->regs->tr));
+
+ /* Minimize flash timing, value: 0x07010101 */
+ clrsetbits_le32(&priv->regs->tmr,
+ GENMASK(31, 0),
+ CA_SF_TMR_CLK(0x07)
+ | CA_SF_TMR_SETUP(0x01)
+ | CA_SF_TMR_HOLD(0x01)
+ | CA_SF_TMR_IDLE(0x01));
+ debug("%s: FLASH_TIMING reg=%#x\n",
+ __func__, readl(&priv->regs->tmr));
+}
+
+static int ca_sflash_probe(struct udevice *dev)
+{
+ struct ca_sflash_priv *priv = dev_get_priv(dev);
+ struct resource res;
+ int ret;
+
+ /* Map the registers */
+ ret = dev_read_resource_byname(dev, "sflash-regs", &res);
+ if (ret) {
+ dev_err(dev, "can't get regs base addresses(ret = %d)!\n", ret);
+ return ret;
+ }
+ priv->regs = devm_ioremap(dev, res.start, resource_size(&res));
+ if (IS_ERR(priv->regs))
+ return PTR_ERR(priv->regs);
+
+ ca_sflash_init(priv);
+
+ printf("SFLASH: Controller probed ready\n");
+ return 0;
+}
+
+static const struct spi_controller_mem_ops ca_sflash_mem_ops = {
+ .exec_op = ca_sflash_exec_op,
+};
+
+static const struct dm_spi_ops ca_sflash_ops = {
+ .claim_bus = ca_sflash_claim_bus,
+ .release_bus = ca_sflash_release_bus,
+ .set_speed = ca_sflash_set_speed,
+ .set_mode = ca_sflash_set_mode,
+ .mem_ops = &ca_sflash_mem_ops,
+};
+
+static const struct udevice_id ca_sflash_ids[] = {
+ {.compatible = "cortina,ca-sflash"},
+ {}
+};
+
+U_BOOT_DRIVER(ca_sflash) = {
+ .name = "ca_sflash",
+ .id = UCLASS_SPI,
+ .of_match = ca_sflash_ids,
+ .ops = &ca_sflash_ops,
+ .priv_auto_alloc_size = sizeof(struct ca_sflash_priv),
+ .probe = ca_sflash_probe,
+};
diff --git a/drivers/spi/designware_spi.c b/drivers/spi/designware_spi.c
index 4fa4585fc3..88e638c950 100644
--- a/drivers/spi/designware_spi.c
+++ b/drivers/spi/designware_spi.c
@@ -3,37 +3,42 @@
* Designware master SPI core controller driver
*
* Copyright (C) 2014 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
*
* Very loosely based on the Linux driver:
* drivers/spi/spi-dw.c, which is:
* Copyright (c) 2009, Intel Corporation.
*/
+#define LOG_CATEGORY UCLASS_SPI
#include <common.h>
-#include <log.h>
-#include <asm-generic/gpio.h>
#include <clk.h>
#include <dm.h>
+#include <dm/device_compat.h>
#include <errno.h>
-#include <malloc.h>
-#include <spi.h>
#include <fdtdec.h>
+#include <log.h>
+#include <malloc.h>
#include <reset.h>
-#include <dm/device_compat.h>
+#include <spi.h>
+#include <spi-mem.h>
+#include <asm/io.h>
+#include <asm-generic/gpio.h>
+#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/compat.h>
#include <linux/iopoll.h>
-#include <asm/io.h>
+#include <linux/sizes.h>
/* Register offsets */
-#define DW_SPI_CTRL0 0x00
-#define DW_SPI_CTRL1 0x04
+#define DW_SPI_CTRLR0 0x00
+#define DW_SPI_CTRLR1 0x04
#define DW_SPI_SSIENR 0x08
#define DW_SPI_MWCR 0x0c
#define DW_SPI_SER 0x10
#define DW_SPI_BAUDR 0x14
-#define DW_SPI_TXFLTR 0x18
-#define DW_SPI_RXFLTR 0x1c
+#define DW_SPI_TXFTLR 0x18
+#define DW_SPI_RXFTLR 0x1c
#define DW_SPI_TXFLR 0x20
#define DW_SPI_RXFLR 0x24
#define DW_SPI_SR 0x28
@@ -53,28 +58,48 @@
#define DW_SPI_DR 0x60
/* Bit fields in CTRLR0 */
-#define SPI_DFS_OFFSET 0
-
-#define SPI_FRF_OFFSET 4
-#define SPI_FRF_SPI 0x0
-#define SPI_FRF_SSP 0x1
-#define SPI_FRF_MICROWIRE 0x2
-#define SPI_FRF_RESV 0x3
-
-#define SPI_MODE_OFFSET 6
-#define SPI_SCPH_OFFSET 6
-#define SPI_SCOL_OFFSET 7
-
-#define SPI_TMOD_OFFSET 8
-#define SPI_TMOD_MASK (0x3 << SPI_TMOD_OFFSET)
-#define SPI_TMOD_TR 0x0 /* xmit & recv */
-#define SPI_TMOD_TO 0x1 /* xmit only */
-#define SPI_TMOD_RO 0x2 /* recv only */
-#define SPI_TMOD_EPROMREAD 0x3 /* eeprom read mode */
-
-#define SPI_SLVOE_OFFSET 10
-#define SPI_SRL_OFFSET 11
-#define SPI_CFS_OFFSET 12
+/*
+ * Only present when SSI_MAX_XFER_SIZE=16. This is the default, and the only
+ * option before version 3.23a.
+ */
+#define CTRLR0_DFS_MASK GENMASK(3, 0)
+
+#define CTRLR0_FRF_MASK GENMASK(5, 4)
+#define CTRLR0_FRF_SPI 0x0
+#define CTRLR0_FRF_SSP 0x1
+#define CTRLR0_FRF_MICROWIRE 0x2
+#define CTRLR0_FRF_RESV 0x3
+
+#define CTRLR0_MODE_MASK GENMASK(7, 6)
+#define CTRLR0_MODE_SCPH 0x1
+#define CTRLR0_MODE_SCPOL 0x2
+
+#define CTRLR0_TMOD_MASK GENMASK(9, 8)
+#define CTRLR0_TMOD_TR 0x0 /* xmit & recv */
+#define CTRLR0_TMOD_TO 0x1 /* xmit only */
+#define CTRLR0_TMOD_RO 0x2 /* recv only */
+#define CTRLR0_TMOD_EPROMREAD 0x3 /* eeprom read mode */
+
+#define CTRLR0_SLVOE_OFFSET 10
+#define CTRLR0_SRL_OFFSET 11
+#define CTRLR0_CFS_MASK GENMASK(15, 12)
+
+/* Only present when SSI_MAX_XFER_SIZE=32 */
+#define CTRLR0_DFS_32_MASK GENMASK(20, 16)
+
+/* The next field is only present on versions after 4.00a */
+#define CTRLR0_SPI_FRF_MASK GENMASK(22, 21)
+#define CTRLR0_SPI_FRF_BYTE 0x0
+#define CTRLR0_SPI_FRF_DUAL 0x1
+#define CTRLR0_SPI_FRF_QUAD 0x2
+
+/* Bit fields in CTRLR0 based on DWC_ssi_databook.pdf v1.01a */
+#define DWC_SSI_CTRLR0_DFS_MASK GENMASK(4, 0)
+#define DWC_SSI_CTRLR0_FRF_MASK GENMASK(7, 6)
+#define DWC_SSI_CTRLR0_MODE_MASK GENMASK(9, 8)
+#define DWC_SSI_CTRLR0_TMOD_MASK GENMASK(11, 10)
+#define DWC_SSI_CTRLR0_SRL_OFFSET 13
+#define DWC_SSI_CTRLR0_SPI_FRF_MASK GENMASK(23, 22)
/* Bit fields in SR, 7 bits */
#define SR_MASK GENMASK(6, 0) /* cover 7 bits */
@@ -94,27 +119,29 @@ struct dw_spi_plat {
};
struct dw_spi_priv {
- void __iomem *regs;
- unsigned int freq; /* Default frequency */
- unsigned int mode;
struct clk clk;
- unsigned long bus_clk_rate;
-
+ struct reset_ctl_bulk resets;
struct gpio_desc cs_gpio; /* External chip-select gpio */
- int bits_per_word;
- u8 cs; /* chip select pin */
- u8 tmode; /* TR/TO/RO/EEPROM */
- u8 type; /* SPI/SSP/MicroWire */
- int len;
+ u32 (*update_cr0)(struct dw_spi_priv *priv);
- u32 fifo_len; /* depth of the FIFO buffer */
- void *tx;
- void *tx_end;
+ void __iomem *regs;
+ unsigned long bus_clk_rate;
+ unsigned int freq; /* Default frequency */
+ unsigned int mode;
+
+ const void *tx;
+ const void *tx_end;
void *rx;
void *rx_end;
+ u32 fifo_len; /* depth of the FIFO buffer */
+ u32 max_xfer; /* Maximum transfer size (in bits) */
- struct reset_ctl_bulk resets;
+ int bits_per_word;
+ int len;
+ u8 cs; /* chip select pin */
+ u8 tmode; /* TR/TO/RO/EEPROM */
+ u8 type; /* SPI/SSP/MicroWire */
};
static inline u32 dw_read(struct dw_spi_priv *priv, u32 offset)
@@ -127,6 +154,53 @@ static inline void dw_write(struct dw_spi_priv *priv, u32 offset, u32 val)
__raw_writel(val, priv->regs + offset);
}
+static u32 dw_spi_dw16_update_cr0(struct dw_spi_priv *priv)
+{
+ return FIELD_PREP(CTRLR0_DFS_MASK, priv->bits_per_word - 1)
+ | FIELD_PREP(CTRLR0_FRF_MASK, priv->type)
+ | FIELD_PREP(CTRLR0_MODE_MASK, priv->mode)
+ | FIELD_PREP(CTRLR0_TMOD_MASK, priv->tmode);
+}
+
+static u32 dw_spi_dw32_update_cr0(struct dw_spi_priv *priv)
+{
+ return FIELD_PREP(CTRLR0_DFS_32_MASK, priv->bits_per_word - 1)
+ | FIELD_PREP(CTRLR0_FRF_MASK, priv->type)
+ | FIELD_PREP(CTRLR0_MODE_MASK, priv->mode)
+ | FIELD_PREP(CTRLR0_TMOD_MASK, priv->tmode);
+}
+
+static u32 dw_spi_dwc_update_cr0(struct dw_spi_priv *priv)
+{
+ return FIELD_PREP(DWC_SSI_CTRLR0_DFS_MASK, priv->bits_per_word - 1)
+ | FIELD_PREP(DWC_SSI_CTRLR0_FRF_MASK, priv->type)
+ | FIELD_PREP(DWC_SSI_CTRLR0_MODE_MASK, priv->mode)
+ | FIELD_PREP(DWC_SSI_CTRLR0_TMOD_MASK, priv->tmode);
+}
+
+static int dw_spi_apb_init(struct udevice *bus, struct dw_spi_priv *priv)
+{
+ /* If we read zeros from DFS, then we need to use DFS_32 instead */
+ dw_write(priv, DW_SPI_SSIENR, 0);
+ dw_write(priv, DW_SPI_CTRLR0, 0xffffffff);
+ if (FIELD_GET(CTRLR0_DFS_MASK, dw_read(priv, DW_SPI_CTRLR0))) {
+ priv->max_xfer = 16;
+ priv->update_cr0 = dw_spi_dw16_update_cr0;
+ } else {
+ priv->max_xfer = 32;
+ priv->update_cr0 = dw_spi_dw32_update_cr0;
+ }
+
+ return 0;
+}
+
+static int dw_spi_dwc_init(struct udevice *bus, struct dw_spi_priv *priv)
+{
+ priv->max_xfer = 32;
+ priv->update_cr0 = dw_spi_dwc_update_cr0;
+ return 0;
+}
+
static int request_gpio_cs(struct udevice *bus)
{
#if CONFIG_IS_ENABLED(DM_GPIO) && !defined(CONFIG_SPL_BUILD)
@@ -134,12 +208,13 @@ static int request_gpio_cs(struct udevice *bus)
int ret;
/* External chip select gpio line is optional */
- ret = gpio_request_by_name(bus, "cs-gpio", 0, &priv->cs_gpio, 0);
+ ret = gpio_request_by_name(bus, "cs-gpios", 0, &priv->cs_gpio,
+ GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
if (ret == -ENOENT)
return 0;
if (ret < 0) {
- printf("Error: %d: Can't get %s gpio!\n", ret, bus->name);
+ dev_err(bus, "Couldn't request gpio! (error %d)\n", ret);
return ret;
}
@@ -148,7 +223,7 @@ static int request_gpio_cs(struct udevice *bus)
GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
}
- debug("%s: used external gpio for CS management\n", __func__);
+ dev_dbg(bus, "Using external gpio for CS management\n");
#endif
return 0;
}
@@ -158,27 +233,27 @@ static int dw_spi_of_to_plat(struct udevice *bus)
struct dw_spi_plat *plat = bus->plat;
plat->regs = dev_read_addr_ptr(bus);
+ if (!plat->regs)
+ return -EINVAL;
/* Use 500KHz as a suitable default */
plat->frequency = dev_read_u32_default(bus, "spi-max-frequency",
500000);
- debug("%s: regs=%p max-frequency=%d\n", __func__, plat->regs,
- plat->frequency);
- return request_gpio_cs(bus);
-}
+ if (dev_read_bool(bus, "spi-slave"))
+ return -EINVAL;
-static inline void spi_enable_chip(struct dw_spi_priv *priv, int enable)
-{
- dw_write(priv, DW_SPI_SSIENR, (enable ? 1 : 0));
+ dev_info(bus, "max-frequency=%d\n", plat->frequency);
+
+ return request_gpio_cs(bus);
}
/* Restart the controller, disable all interrupts, clean rx fifo */
-static void spi_hw_init(struct dw_spi_priv *priv)
+static void spi_hw_init(struct udevice *bus, struct dw_spi_priv *priv)
{
- spi_enable_chip(priv, 0);
+ dw_write(priv, DW_SPI_SSIENR, 0);
dw_write(priv, DW_SPI_IMR, 0xff);
- spi_enable_chip(priv, 1);
+ dw_write(priv, DW_SPI_SSIENR, 1);
/*
* Try to detect the FIFO depth if not set by interface driver,
@@ -188,15 +263,15 @@ static void spi_hw_init(struct dw_spi_priv *priv)
u32 fifo;
for (fifo = 1; fifo < 256; fifo++) {
- dw_write(priv, DW_SPI_TXFLTR, fifo);
- if (fifo != dw_read(priv, DW_SPI_TXFLTR))
+ dw_write(priv, DW_SPI_TXFTLR, fifo);
+ if (fifo != dw_read(priv, DW_SPI_TXFTLR))
break;
}
priv->fifo_len = (fifo == 1) ? 0 : fifo;
- dw_write(priv, DW_SPI_TXFLTR, 0);
+ dw_write(priv, DW_SPI_TXFTLR, 0);
}
- debug("%s: fifo_len=%d\n", __func__, priv->fifo_len);
+ dev_dbg(bus, "fifo_len=%d\n", priv->fifo_len);
}
/*
@@ -221,8 +296,7 @@ __weak int dw_spi_get_clk(struct udevice *bus, ulong *rate)
if (!*rate)
goto err_rate;
- debug("%s: get spi controller clk via device tree: %lu Hz\n",
- __func__, *rate);
+ dev_dbg(bus, "Got clock via device tree: %lu Hz\n", *rate);
return 0;
@@ -247,25 +321,31 @@ static int dw_spi_reset(struct udevice *bus)
if (ret == -ENOENT || ret == -ENOTSUPP)
return 0;
- dev_warn(bus, "Can't get reset: %d\n", ret);
+ dev_warn(bus, "Couldn't find/assert reset device (error %d)\n",
+ ret);
return ret;
}
ret = reset_deassert_bulk(&priv->resets);
if (ret) {
reset_release_bulk(&priv->resets);
- dev_err(bus, "Failed to reset: %d\n", ret);
+ dev_err(bus, "Failed to de-assert reset for SPI (error %d)\n",
+ ret);
return ret;
}
return 0;
}
+typedef int (*dw_spi_init_t)(struct udevice *bus, struct dw_spi_priv *priv);
+
static int dw_spi_probe(struct udevice *bus)
{
+ dw_spi_init_t init = (dw_spi_init_t)dev_get_driver_data(bus);
struct dw_spi_plat *plat = dev_get_plat(bus);
struct dw_spi_priv *priv = dev_get_priv(bus);
int ret;
+ u32 version;
priv->regs = plat->regs;
priv->freq = plat->frequency;
@@ -278,13 +358,24 @@ static int dw_spi_probe(struct udevice *bus)
if (ret)
return ret;
+ if (!init)
+ return -EINVAL;
+ ret = init(bus, priv);
+ if (ret)
+ return ret;
+
+ version = dw_read(priv, DW_SPI_VERSION);
+ dev_dbg(bus, "ssi_version_id=%c.%c%c%c ssi_max_xfer_size=%u\n",
+ version >> 24, version >> 16, version >> 8, version,
+ priv->max_xfer);
+
/* Currently only bits_per_word == 8 supported */
priv->bits_per_word = 8;
priv->tmode = 0; /* Tx & Rx */
/* Basic HW init */
- spi_hw_init(priv);
+ spi_hw_init(bus, priv);
return 0;
}
@@ -322,7 +413,7 @@ static inline u32 rx_max(struct dw_spi_priv *priv)
static void dw_writer(struct dw_spi_priv *priv)
{
u32 max = tx_max(priv);
- u16 txw = 0;
+ u32 txw = 0xFFFFFFFF;
while (max--) {
/* Set the tx word if the transfer's original "tx" is not null */
@@ -333,7 +424,7 @@ static void dw_writer(struct dw_spi_priv *priv)
txw = *(u16 *)(priv->tx);
}
dw_write(priv, DW_SPI_DR, txw);
- debug("%s: tx=0x%02x\n", __func__, txw);
+ log_content("tx=0x%02x\n", txw);
priv->tx += priv->bits_per_word >> 3;
}
}
@@ -345,7 +436,7 @@ static void dw_reader(struct dw_spi_priv *priv)
while (max--) {
rxw = dw_read(priv, DW_SPI_DR);
- debug("%s: rx=0x%02x\n", __func__, rxw);
+ log_content("rx=0x%02x\n", rxw);
/* Care about rx if the transfer's original "rx" is not null */
if (priv->rx_end - priv->len) {
@@ -400,7 +491,7 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
/* spi core configured to do 8 bit transfers */
if (bitlen % 8) {
- debug("Non byte aligned SPI transfer.\n");
+ dev_err(dev, "Non byte aligned SPI transfer.\n");
return -1;
}
@@ -408,26 +499,20 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
if (flags & SPI_XFER_BEGIN)
external_cs_manage(dev, false);
- cr0 = (priv->bits_per_word - 1) | (priv->type << SPI_FRF_OFFSET) |
- (priv->mode << SPI_MODE_OFFSET) |
- (priv->tmode << SPI_TMOD_OFFSET);
-
if (rx && tx)
- priv->tmode = SPI_TMOD_TR;
+ priv->tmode = CTRLR0_TMOD_TR;
else if (rx)
- priv->tmode = SPI_TMOD_RO;
+ priv->tmode = CTRLR0_TMOD_RO;
else
/*
- * In transmit only mode (SPI_TMOD_TO) input FIFO never gets
+ * In transmit only mode (CTRL0_TMOD_TO) input FIFO never gets
* any data which breaks our logic in poll_transfer() above.
*/
- priv->tmode = SPI_TMOD_TR;
+ priv->tmode = CTRLR0_TMOD_TR;
- cr0 &= ~SPI_TMOD_MASK;
- cr0 |= (priv->tmode << SPI_TMOD_OFFSET);
+ cr0 = priv->update_cr0(priv);
priv->len = bitlen >> 3;
- debug("%s: rx=%p tx=%p len=%d [bytes]\n", __func__, rx, tx, priv->len);
priv->tx = (void *)tx;
priv->tx_end = priv->tx + priv->len;
@@ -435,12 +520,13 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
priv->rx_end = priv->rx + priv->len;
/* Disable controller before writing control registers */
- spi_enable_chip(priv, 0);
+ dw_write(priv, DW_SPI_SSIENR, 0);
- debug("%s: cr0=%08x\n", __func__, cr0);
+ dev_dbg(dev, "cr0=%08x rx=%p tx=%p len=%d [bytes]\n", cr0, rx, tx,
+ priv->len);
/* Reprogram cr0 only if changed */
- if (dw_read(priv, DW_SPI_CTRL0) != cr0)
- dw_write(priv, DW_SPI_CTRL0, cr0);
+ if (dw_read(priv, DW_SPI_CTRLR0) != cr0)
+ dw_write(priv, DW_SPI_CTRLR0, cr0);
/*
* Configure the desired SS (slave select 0...3) in the controller
@@ -451,7 +537,7 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
dw_write(priv, DW_SPI_SER, 1 << cs);
/* Enable controller after writing control registers */
- spi_enable_chip(priv, 1);
+ dw_write(priv, DW_SPI_SSIENR, 1);
/* Start transfer in a polling loop */
ret = poll_transfer(priv);
@@ -476,6 +562,107 @@ static int dw_spi_xfer(struct udevice *dev, unsigned int bitlen,
return ret;
}
+/*
+ * This function is necessary for reading SPI flash with the native CS
+ * c.f. https://lkml.org/lkml/2015/12/23/132
+ */
+static int dw_spi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
+{
+ bool read = op->data.dir == SPI_MEM_DATA_IN;
+ int pos, i, ret = 0;
+ struct udevice *bus = slave->dev->parent;
+ struct dw_spi_priv *priv = dev_get_priv(bus);
+ u8 op_len = sizeof(op->cmd.opcode) + op->addr.nbytes + op->dummy.nbytes;
+ u8 op_buf[op_len];
+ u32 cr0;
+
+ if (read)
+ priv->tmode = CTRLR0_TMOD_EPROMREAD;
+ else
+ priv->tmode = CTRLR0_TMOD_TO;
+
+ cr0 = priv->update_cr0(priv);
+ dev_dbg(bus, "cr0=%08x buf=%p len=%u [bytes]\n", cr0, op->data.buf.in,
+ op->data.nbytes);
+
+ dw_write(priv, DW_SPI_SSIENR, 0);
+ dw_write(priv, DW_SPI_CTRLR0, cr0);
+ if (read)
+ dw_write(priv, DW_SPI_CTRLR1, op->data.nbytes - 1);
+ dw_write(priv, DW_SPI_SSIENR, 1);
+
+ /* From spi_mem_exec_op */
+ pos = 0;
+ op_buf[pos++] = op->cmd.opcode;
+ if (op->addr.nbytes) {
+ for (i = 0; i < op->addr.nbytes; i++)
+ op_buf[pos + i] = op->addr.val >>
+ (8 * (op->addr.nbytes - i - 1));
+
+ pos += op->addr.nbytes;
+ }
+ if (op->dummy.nbytes)
+ memset(op_buf + pos, 0xff, op->dummy.nbytes);
+
+ external_cs_manage(slave->dev, false);
+
+ priv->tx = &op_buf;
+ priv->tx_end = priv->tx + op_len;
+ priv->rx = NULL;
+ priv->rx_end = NULL;
+ while (priv->tx != priv->tx_end)
+ dw_writer(priv);
+
+ /*
+ * XXX: The following are tight loops! Enabling debug messages may cause
+ * them to fail because we are not reading/writing the fifo fast enough.
+ */
+ if (read) {
+ priv->rx = op->data.buf.in;
+ priv->rx_end = priv->rx + op->data.nbytes;
+
+ dw_write(priv, DW_SPI_SER, 1 << spi_chip_select(slave->dev));
+ while (priv->rx != priv->rx_end)
+ dw_reader(priv);
+ } else {
+ u32 val;
+
+ priv->tx = op->data.buf.out;
+ priv->tx_end = priv->tx + op->data.nbytes;
+
+ /* Fill up the write fifo before starting the transfer */
+ dw_writer(priv);
+ dw_write(priv, DW_SPI_SER, 1 << spi_chip_select(slave->dev));
+ while (priv->tx != priv->tx_end)
+ dw_writer(priv);
+
+ if (readl_poll_timeout(priv->regs + DW_SPI_SR, val,
+ (val & SR_TF_EMPT) && !(val & SR_BUSY),
+ RX_TIMEOUT * 1000)) {
+ ret = -ETIMEDOUT;
+ }
+ }
+
+ dw_write(priv, DW_SPI_SER, 0);
+ external_cs_manage(slave->dev, true);
+
+ dev_dbg(bus, "%u bytes xfered\n", op->data.nbytes);
+ return ret;
+}
+
+/* The size of ctrl1 limits data transfers to 64K */
+static int dw_spi_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op)
+{
+ op->data.nbytes = min(op->data.nbytes, (unsigned int)SZ_64K);
+
+ return 0;
+}
+
+static const struct spi_controller_mem_ops dw_spi_mem_ops = {
+ .exec_op = dw_spi_exec_op,
+ .adjust_op_size = dw_spi_adjust_op_size,
+};
+
static int dw_spi_set_speed(struct udevice *bus, uint speed)
{
struct dw_spi_plat *plat = bus->plat;
@@ -486,7 +673,7 @@ static int dw_spi_set_speed(struct udevice *bus, uint speed)
speed = plat->frequency;
/* Disable controller before writing control registers */
- spi_enable_chip(priv, 0);
+ dw_write(priv, DW_SPI_SSIENR, 0);
/* clk_div doesn't support odd number */
clk_div = priv->bus_clk_rate / speed;
@@ -494,11 +681,10 @@ static int dw_spi_set_speed(struct udevice *bus, uint speed)
dw_write(priv, DW_SPI_BAUDR, clk_div);
/* Enable controller after writing control registers */
- spi_enable_chip(priv, 1);
+ dw_write(priv, DW_SPI_SSIENR, 1);
priv->freq = speed;
- debug("%s: regs=%p speed=%d clk_div=%d\n", __func__, priv->regs,
- priv->freq, clk_div);
+ dev_dbg(bus, "speed=%d clk_div=%d\n", priv->freq, clk_div);
return 0;
}
@@ -513,7 +699,7 @@ static int dw_spi_set_mode(struct udevice *bus, uint mode)
* real transfer function.
*/
priv->mode = mode;
- debug("%s: regs=%p, mode=%d\n", __func__, priv->regs, priv->mode);
+ dev_dbg(bus, "mode=%d\n", priv->mode);
return 0;
}
@@ -541,6 +727,7 @@ static int dw_spi_remove(struct udevice *bus)
static const struct dm_spi_ops dw_spi_ops = {
.xfer = dw_spi_xfer,
+ .mem_ops = &dw_spi_mem_ops,
.set_speed = dw_spi_set_speed,
.set_mode = dw_spi_set_mode,
/*
@@ -550,7 +737,35 @@ static const struct dm_spi_ops dw_spi_ops = {
};
static const struct udevice_id dw_spi_ids[] = {
- { .compatible = "snps,dw-apb-ssi" },
+ /* Generic compatible strings */
+
+ { .compatible = "snps,dw-apb-ssi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "snps,dw-apb-ssi-3.20a", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "snps,dw-apb-ssi-3.22a", .data = (ulong)dw_spi_apb_init },
+ /* First version with SSI_MAX_XFER_SIZE */
+ { .compatible = "snps,dw-apb-ssi-3.23a", .data = (ulong)dw_spi_apb_init },
+ /* First version with Dual/Quad SPI; unused by this driver */
+ { .compatible = "snps,dw-apb-ssi-4.00a", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "snps,dw-apb-ssi-4.01", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "snps,dwc-ssi-1.01a", .data = (ulong)dw_spi_dwc_init },
+
+ /* Compatible strings for specific SoCs */
+
+ /*
+ * Both the Cyclone V and Arria V share a device tree and have the same
+ * version of this device. This compatible string is used for those
+ * devices, and is not used for sofpgas in general.
+ */
+ { .compatible = "altr,socfpga-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "altr,socfpga-arria10-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "canaan,kendryte-k210-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "canaan,kendryte-k210-ssi", .data = (ulong)dw_spi_dwc_init },
+ { .compatible = "intel,stratix10-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "intel,agilex-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "mscc,ocelot-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "mscc,jaguar2-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "snps,axs10x-spi", .data = (ulong)dw_spi_apb_init },
+ { .compatible = "snps,hsdk-spi", .data = (ulong)dw_spi_apb_init },
{ }
};
diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c
index a392a93aa1..5d801fa54b 100644
--- a/drivers/spi/spi-uclass.c
+++ b/drivers/spi/spi-uclass.c
@@ -3,12 +3,15 @@
* Copyright (c) 2014 Google, Inc
*/
+#define LOG_CATEGORY UCLASS_SPI
+
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <malloc.h>
#include <spi.h>
+#include <dm/device_compat.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
#include <dm/lists.h>
@@ -29,7 +32,7 @@ static int spi_set_speed_mode(struct udevice *bus, int speed, int mode)
else
ret = -EINVAL;
if (ret) {
- printf("Cannot set speed (err=%d)\n", ret);
+ dev_err(bus, "Cannot set speed (err=%d)\n", ret);
return ret;
}
@@ -38,7 +41,7 @@ static int spi_set_speed_mode(struct udevice *bus, int speed, int mode)
else
ret = -EINVAL;
if (ret) {
- printf("Cannot set mode (err=%d)\n", ret);
+ dev_err(bus, "Cannot set mode (err=%d)\n", ret);
return ret;
}
@@ -143,13 +146,15 @@ int spi_write_then_read(struct spi_slave *slave, const u8 *opcode,
ret = spi_xfer(slave, n_opcode * 8, opcode, NULL, flags);
if (ret) {
- debug("spi: failed to send command (%zu bytes): %d\n",
- n_opcode, ret);
+ dev_dbg(slave->dev,
+ "spi: failed to send command (%zu bytes): %d\n",
+ n_opcode, ret);
} else if (n_buf != 0) {
ret = spi_xfer(slave, n_buf * 8, txbuf, rxbuf, SPI_XFER_END);
if (ret)
- debug("spi: failed to transfer %zu bytes of data: %d\n",
- n_buf, ret);
+ dev_dbg(slave->dev,
+ "spi: failed to transfer %zu bytes of data: %d\n",
+ n_buf, ret);
}
return ret;
@@ -253,7 +258,7 @@ int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp)
}
if (ret) {
- printf("Invalid cs %d (err=%d)\n", cs, ret);
+ dev_err(bus, "Invalid cs %d (err=%d)\n", cs, ret);
return ret;
}
@@ -262,7 +267,7 @@ int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp)
struct dm_spi_slave_plat *plat;
plat = dev_get_parent_plat(dev);
- debug("%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
+ dev_dbg(bus, "%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
if (plat->cs == cs) {
*devp = dev;
return 0;
@@ -280,7 +285,7 @@ int spi_cs_is_valid(unsigned int busnum, unsigned int cs)
ret = uclass_find_device_by_seq(UCLASS_SPI, busnum, &bus);
if (ret) {
- debug("%s: No bus %d\n", __func__, busnum);
+ log_debug("%s: No bus %d\n", __func__, busnum);
return ret;
}
@@ -309,12 +314,12 @@ int spi_find_bus_and_cs(int busnum, int cs, struct udevice **busp,
ret = uclass_find_device_by_seq(UCLASS_SPI, busnum, &bus);
if (ret) {
- debug("%s: No bus %d\n", __func__, busnum);
+ log_debug("%s: No bus %d\n", __func__, busnum);
return ret;
}
ret = spi_find_chip_select(bus, cs, &dev);
if (ret) {
- debug("%s: No cs %d\n", __func__, cs);
+ dev_dbg(bus, "%s: No cs %d\n", __func__, cs);
return ret;
}
*busp = bus;
@@ -340,7 +345,7 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
ret = uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus);
#endif
if (ret) {
- printf("Invalid bus %d (err=%d)\n", busnum, ret);
+ log_err("Invalid bus %d (err=%d)\n", busnum, ret);
return ret;
}
ret = spi_find_chip_select(bus, cs, &dev);
@@ -351,12 +356,12 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
* SPI flash chip - we will bind to the correct driver.
*/
if (ret == -ENODEV && drv_name) {
- debug("%s: Binding new device '%s', busnum=%d, cs=%d, driver=%s\n",
- __func__, dev_name, busnum, cs, drv_name);
+ dev_dbg(bus, "%s: Binding new device '%s', busnum=%d, cs=%d, driver=%s\n",
+ __func__, dev_name, busnum, cs, drv_name);
ret = device_bind_driver(bus, drv_name, dev_name, &dev);
if (ret) {
- debug("%s: Unable to bind driver (ret=%d)\n", __func__,
- ret);
+ dev_dbg(bus, "%s: Unable to bind driver (ret=%d)\n",
+ __func__, ret);
return ret;
}
plat = dev_get_parent_plat(dev);
@@ -364,15 +369,15 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
if (speed) {
plat->max_hz = speed;
} else {
- printf("Warning: SPI speed fallback to %u kHz\n",
- SPI_DEFAULT_SPEED_HZ / 1000);
+ dev_warn(bus,
+ "Warning: SPI speed fallback to %u kHz\n",
+ SPI_DEFAULT_SPEED_HZ / 1000);
plat->max_hz = SPI_DEFAULT_SPEED_HZ;
}
plat->mode = mode;
created = true;
} else if (ret) {
- printf("Invalid chip select %d:%d (err=%d)\n", busnum, cs,
- ret);
+ dev_err(bus, "Invalid chip select %d:%d (err=%d)\n", busnum, cs, ret);
return ret;
}
@@ -401,13 +406,13 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
*busp = bus;
*devp = slave;
- debug("%s: bus=%p, slave=%p\n", __func__, bus, *devp);
+ log_debug("%s: bus=%p, slave=%p\n", __func__, bus, *devp);
return 0;
err:
- debug("%s: Error path, created=%d, device '%s'\n", __func__,
- created, dev->name);
+ log_debug("%s: Error path, created=%d, device '%s'\n", __func__,
+ created, dev->name);
if (created) {
device_remove(dev, DM_REMOVE_NORMAL);
device_unbind(dev);
generated by cgit (git 2.34.1) at 2024-11-12 13:56:24 +0000