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-rw-r--r--drivers/spi/Makefile2
-rw-r--r--drivers/spi/ftssp010_spi.c508
-rw-r--r--drivers/spi/sh_qspi.c278
-rw-r--r--drivers/spi/sh_spi.c10
-rw-r--r--drivers/spi/tegra114_spi.c21
5 files changed, 798 insertions, 21 deletions
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index ed4ecd754..81b6af669 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_CF_SPI) += cf_spi.o
obj-$(CONFIG_CF_QSPI) += cf_qspi.o
obj-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
obj-$(CONFIG_EXYNOS_SPI) += exynos_spi.o
+obj-$(CONFIG_FTSSP010_SPI) += ftssp010_spi.o
obj-$(CONFIG_ICH_SPI) += ich.o
obj-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o
obj-$(CONFIG_MPC52XX_SPI) += mpc52xx_spi.o
@@ -30,6 +31,7 @@ obj-$(CONFIG_OMAP3_SPI) += omap3_spi.o
obj-$(CONFIG_SANDBOX_SPI) += sandbox_spi.o
obj-$(CONFIG_SOFT_SPI) += soft_spi.o
obj-$(CONFIG_SH_SPI) += sh_spi.o
+obj-$(CONFIG_SH_QSPI) += sh_qspi.o
obj-$(CONFIG_FSL_ESPI) += fsl_espi.o
obj-$(CONFIG_FDT_SPI) += fdt_spi.o
obj-$(CONFIG_TEGRA20_SFLASH) += tegra20_sflash.o
diff --git a/drivers/spi/ftssp010_spi.c b/drivers/spi/ftssp010_spi.c
new file mode 100644
index 000000000..aa3b5a01c
--- /dev/null
+++ b/drivers/spi/ftssp010_spi.c
@@ -0,0 +1,508 @@
+/*
+ * (C) Copyright 2013
+ * Faraday Technology Corporation. <http://www.faraday-tech.com/tw/>
+ * Kuo-Jung Su <dantesu@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/compat.h>
+#include <asm/io.h>
+#include <malloc.h>
+#include <spi.h>
+
+#ifndef CONFIG_FTSSP010_BASE_LIST
+#define CONFIG_FTSSP010_BASE_LIST { CONFIG_FTSSP010_BASE }
+#endif
+
+#ifndef CONFIG_FTSSP010_GPIO_BASE
+#define CONFIG_FTSSP010_GPIO_BASE 0
+#endif
+
+#ifndef CONFIG_FTSSP010_GPIO_LIST
+#define CONFIG_FTSSP010_GPIO_LIST { CONFIG_FTSSP010_GPIO_BASE }
+#endif
+
+#ifndef CONFIG_FTSSP010_CLOCK
+#define CONFIG_FTSSP010_CLOCK clk_get_rate("SSP");
+#endif
+
+#ifndef CONFIG_FTSSP010_TIMEOUT
+#define CONFIG_FTSSP010_TIMEOUT 100
+#endif
+
+/* FTSSP010 chip registers */
+struct ftssp010_regs {
+ uint32_t cr[3];/* control register */
+ uint32_t sr; /* status register */
+ uint32_t icr; /* interrupt control register */
+ uint32_t isr; /* interrupt status register */
+ uint32_t dr; /* data register */
+ uint32_t rsvd[17];
+ uint32_t revr; /* revision register */
+ uint32_t fear; /* feature register */
+};
+
+/* Control Register 0 */
+#define CR0_FFMT_MASK (7 << 12)
+#define CR0_FFMT_SSP (0 << 12)
+#define CR0_FFMT_SPI (1 << 12)
+#define CR0_FFMT_MICROWIRE (2 << 12)
+#define CR0_FFMT_I2S (3 << 12)
+#define CR0_FFMT_AC97 (4 << 12)
+#define CR0_FLASH (1 << 11)
+#define CR0_FSDIST(x) (((x) & 0x03) << 8)
+#define CR0_LOOP (1 << 7) /* loopback mode */
+#define CR0_LSB (1 << 6) /* LSB */
+#define CR0_FSPO (1 << 5) /* fs atcive low (I2S only) */
+#define CR0_FSJUSTIFY (1 << 4)
+#define CR0_OPM_SLAVE (0 << 2)
+#define CR0_OPM_MASTER (3 << 2)
+#define CR0_OPM_I2S_MSST (3 << 2) /* master stereo mode */
+#define CR0_OPM_I2S_MSMO (2 << 2) /* master mono mode */
+#define CR0_OPM_I2S_SLST (1 << 2) /* slave stereo mode */
+#define CR0_OPM_I2S_SLMO (0 << 2) /* slave mono mode */
+#define CR0_SCLKPO (1 << 1) /* clock polarity */
+#define CR0_SCLKPH (1 << 0) /* clock phase */
+
+/* Control Register 1 */
+#define CR1_PDL(x) (((x) & 0xff) << 24) /* padding length */
+#define CR1_SDL(x) ((((x) - 1) & 0x1f) << 16) /* data length */
+#define CR1_DIV(x) (((x) - 1) & 0xffff) /* clock divider */
+
+/* Control Register 2 */
+#define CR2_CS(x) (((x) & 3) << 10) /* CS/FS select */
+#define CR2_FS (1 << 9) /* CS/FS signal level */
+#define CR2_TXEN (1 << 8) /* tx enable */
+#define CR2_RXEN (1 << 7) /* rx enable */
+#define CR2_RESET (1 << 6) /* chip reset */
+#define CR2_TXFC (1 << 3) /* tx fifo Clear */
+#define CR2_RXFC (1 << 2) /* rx fifo Clear */
+#define CR2_TXDOE (1 << 1) /* tx data output enable */
+#define CR2_EN (1 << 0) /* chip enable */
+
+/* Status Register */
+#define SR_RFF (1 << 0) /* rx fifo full */
+#define SR_TFNF (1 << 1) /* tx fifo not full */
+#define SR_BUSY (1 << 2) /* chip busy */
+#define SR_RFVE(reg) (((reg) >> 4) & 0x1f) /* rx fifo valid entries */
+#define SR_TFVE(reg) (((reg) >> 12) & 0x1f) /* tx fifo valid entries */
+
+/* Feature Register */
+#define FEAR_BITS(reg) ((((reg) >> 0) & 0xff) + 1) /* data width */
+#define FEAR_RFSZ(reg) ((((reg) >> 8) & 0xff) + 1) /* rx fifo size */
+#define FEAR_TFSZ(reg) ((((reg) >> 16) & 0xff) + 1) /* tx fifo size */
+#define FEAR_AC97 (1 << 24)
+#define FEAR_I2S (1 << 25)
+#define FEAR_SPI_MWR (1 << 26)
+#define FEAR_SSP (1 << 27)
+#define FEAR_SPDIF (1 << 28)
+
+/* FTGPIO010 chip registers */
+struct ftgpio010_regs {
+ uint32_t out; /* 0x00: Data Output */
+ uint32_t in; /* 0x04: Data Input */
+ uint32_t dir; /* 0x08: Direction */
+ uint32_t bypass; /* 0x0c: Bypass */
+ uint32_t set; /* 0x10: Data Set */
+ uint32_t clr; /* 0x14: Data Clear */
+ uint32_t pull_up; /* 0x18: Pull-Up Enabled */
+ uint32_t pull_st; /* 0x1c: Pull State (0=pull-down, 1=pull-up) */
+};
+
+struct ftssp010_gpio {
+ struct ftgpio010_regs *regs;
+ uint32_t pin;
+};
+
+struct ftssp010_spi {
+ struct spi_slave slave;
+ struct ftssp010_gpio gpio;
+ struct ftssp010_regs *regs;
+ uint32_t fifo;
+ uint32_t mode;
+ uint32_t div;
+ uint32_t clk;
+ uint32_t speed;
+ uint32_t revision;
+};
+
+static inline struct ftssp010_spi *to_ftssp010_spi(struct spi_slave *slave)
+{
+ return container_of(slave, struct ftssp010_spi, slave);
+}
+
+static int get_spi_chip(int bus, struct ftssp010_spi *chip)
+{
+ uint32_t fear, base[] = CONFIG_FTSSP010_BASE_LIST;
+
+ if (bus >= ARRAY_SIZE(base) || !base[bus])
+ return -1;
+
+ chip->regs = (struct ftssp010_regs *)base[bus];
+
+ chip->revision = readl(&chip->regs->revr);
+
+ fear = readl(&chip->regs->fear);
+ chip->fifo = min_t(uint32_t, FEAR_TFSZ(fear), FEAR_RFSZ(fear));
+
+ return 0;
+}
+
+static int get_spi_gpio(int bus, struct ftssp010_gpio *chip)
+{
+ uint32_t base[] = CONFIG_FTSSP010_GPIO_LIST;
+
+ if (bus >= ARRAY_SIZE(base) || !base[bus])
+ return -1;
+
+ chip->regs = (struct ftgpio010_regs *)(base[bus] & 0xfff00000);
+ chip->pin = base[bus] & 0x1f;
+
+ /* make it an output pin */
+ setbits_le32(&chip->regs->dir, 1 << chip->pin);
+
+ return 0;
+}
+
+static int ftssp010_wait(struct ftssp010_spi *chip)
+{
+ struct ftssp010_regs *regs = chip->regs;
+ int ret = -1;
+ ulong t;
+
+ /* wait until device idle */
+ for (t = get_timer(0); get_timer(t) < CONFIG_FTSSP010_TIMEOUT; ) {
+ if (readl(&regs->sr) & SR_BUSY)
+ continue;
+ ret = 0;
+ break;
+ }
+
+ if (ret)
+ puts("ftspi010: busy timeout\n");
+
+ return ret;
+}
+
+static int ftssp010_wait_tx(struct ftssp010_spi *chip)
+{
+ struct ftssp010_regs *regs = chip->regs;
+ int ret = -1;
+ ulong t;
+
+ /* wait until tx fifo not full */
+ for (t = get_timer(0); get_timer(t) < CONFIG_FTSSP010_TIMEOUT; ) {
+ if (!(readl(&regs->sr) & SR_TFNF))
+ continue;
+ ret = 0;
+ break;
+ }
+
+ if (ret)
+ puts("ftssp010: tx timeout\n");
+
+ return ret;
+}
+
+static int ftssp010_wait_rx(struct ftssp010_spi *chip)
+{
+ struct ftssp010_regs *regs = chip->regs;
+ int ret = -1;
+ ulong t;
+
+ /* wait until rx fifo not empty */
+ for (t = get_timer(0); get_timer(t) < CONFIG_FTSSP010_TIMEOUT; ) {
+ if (!SR_RFVE(readl(&regs->sr)))
+ continue;
+ ret = 0;
+ break;
+ }
+
+ if (ret)
+ puts("ftssp010: rx timeout\n");
+
+ return ret;
+}
+
+static int ftssp010_spi_work_transfer_v2(struct ftssp010_spi *chip,
+ const void *tx_buf, void *rx_buf, int len, uint flags)
+{
+ struct ftssp010_regs *regs = chip->regs;
+ const uint8_t *txb = tx_buf;
+ uint8_t *rxb = rx_buf;
+
+ while (len > 0) {
+ int i, depth = min(chip->fifo >> 2, len);
+ uint32_t xmsk = 0;
+
+ if (tx_buf) {
+ for (i = 0; i < depth; ++i) {
+ ftssp010_wait_tx(chip);
+ writel(*txb++, &regs->dr);
+ }
+ xmsk |= CR2_TXEN | CR2_TXDOE;
+ if ((readl(&regs->cr[2]) & xmsk) != xmsk)
+ setbits_le32(&regs->cr[2], xmsk);
+ }
+ if (rx_buf) {
+ xmsk |= CR2_RXEN;
+ if ((readl(&regs->cr[2]) & xmsk) != xmsk)
+ setbits_le32(&regs->cr[2], xmsk);
+ for (i = 0; i < depth; ++i) {
+ ftssp010_wait_rx(chip);
+ *rxb++ = (uint8_t)readl(&regs->dr);
+ }
+ }
+
+ len -= depth;
+ }
+
+ return 0;
+}
+
+static int ftssp010_spi_work_transfer_v1(struct ftssp010_spi *chip,
+ const void *tx_buf, void *rx_buf, int len, uint flags)
+{
+ struct ftssp010_regs *regs = chip->regs;
+ const uint8_t *txb = tx_buf;
+ uint8_t *rxb = rx_buf;
+
+ while (len > 0) {
+ int i, depth = min(chip->fifo >> 2, len);
+ uint32_t tmp;
+
+ for (i = 0; i < depth; ++i) {
+ ftssp010_wait_tx(chip);
+ writel(txb ? (*txb++) : 0, &regs->dr);
+ }
+ for (i = 0; i < depth; ++i) {
+ ftssp010_wait_rx(chip);
+ tmp = readl(&regs->dr);
+ if (rxb)
+ *rxb++ = (uint8_t)tmp;
+ }
+
+ len -= depth;
+ }
+
+ return 0;
+}
+
+static void ftssp010_cs_set(struct ftssp010_spi *chip, int high)
+{
+ struct ftssp010_regs *regs = chip->regs;
+ struct ftssp010_gpio *gpio = &chip->gpio;
+ uint32_t mask;
+
+ /* cs pull high/low */
+ if (chip->revision >= 0x11900) {
+ mask = CR2_CS(chip->slave.cs) | (high ? CR2_FS : 0);
+ writel(mask, &regs->cr[2]);
+ } else if (gpio->regs) {
+ mask = 1 << gpio->pin;
+ if (high)
+ writel(mask, &gpio->regs->set);
+ else
+ writel(mask, &gpio->regs->clr);
+ }
+
+ /* extra delay for signal propagation */
+ udelay_masked(1);
+}
+
+/*
+ * Determine if a SPI chipselect is valid.
+ * This function is provided by the board if the low-level SPI driver
+ * needs it to determine if a given chipselect is actually valid.
+ *
+ * Returns: 1 if bus:cs identifies a valid chip on this board, 0
+ * otherwise.
+ */
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+ struct ftssp010_spi chip;
+
+ if (get_spi_chip(bus, &chip))
+ return 0;
+
+ if (!cs)
+ return 1;
+ else if ((cs < 4) && (chip.revision >= 0x11900))
+ return 1;
+
+ return 0;
+}
+
+/*
+ * Activate a SPI chipselect.
+ * This function is provided by the board code when using a driver
+ * that can't control its chipselects automatically (e.g.
+ * common/soft_spi.c). When called, it should activate the chip select
+ * to the device identified by "slave".
+ */
+void spi_cs_activate(struct spi_slave *slave)
+{
+ struct ftssp010_spi *chip = to_ftssp010_spi(slave);
+ struct ftssp010_regs *regs = chip->regs;
+
+ /* cs pull */
+ if (chip->mode & SPI_CS_HIGH)
+ ftssp010_cs_set(chip, 1);
+ else
+ ftssp010_cs_set(chip, 0);
+
+ /* chip enable + fifo clear */
+ setbits_le32(&regs->cr[2], CR2_EN | CR2_TXFC | CR2_RXFC);
+}
+
+/*
+ * Deactivate a SPI chipselect.
+ * This function is provided by the board code when using a driver
+ * that can't control its chipselects automatically (e.g.
+ * common/soft_spi.c). When called, it should deactivate the chip
+ * select to the device identified by "slave".
+ */
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+ struct ftssp010_spi *chip = to_ftssp010_spi(slave);
+
+ /* wait until chip idle */
+ ftssp010_wait(chip);
+
+ /* cs pull */
+ if (chip->mode & SPI_CS_HIGH)
+ ftssp010_cs_set(chip, 0);
+ else
+ ftssp010_cs_set(chip, 1);
+}
+
+void spi_init(void)
+{
+ /* nothing to do */
+}
+
+struct spi_slave *spi_setup_slave(uint bus, uint cs, uint max_hz, uint mode)
+{
+ struct ftssp010_spi *chip;
+
+ if (mode & SPI_3WIRE) {
+ puts("ftssp010: can't do 3-wire\n");
+ return NULL;
+ }
+
+ if (mode & SPI_SLAVE) {
+ puts("ftssp010: can't do slave mode\n");
+ return NULL;
+ }
+
+ if (mode & SPI_PREAMBLE) {
+ puts("ftssp010: can't skip preamble bytes\n");
+ return NULL;
+ }
+
+ if (!spi_cs_is_valid(bus, cs)) {
+ puts("ftssp010: invalid (bus, cs)\n");
+ return NULL;
+ }
+
+ chip = spi_alloc_slave(struct ftssp010_spi, bus, cs);
+ if (!chip)
+ return NULL;
+
+ if (get_spi_chip(bus, chip))
+ goto free_out;
+
+ if (chip->revision < 0x11900 && get_spi_gpio(bus, &chip->gpio)) {
+ puts("ftssp010: Before revision 1.19.0, its clock & cs are\n"
+ "controlled by tx engine which is not synced with rx engine,\n"
+ "so the clock & cs might be shutdown before rx engine\n"
+ "finishs its jobs.\n"
+ "If possible, please add a dedicated gpio for it.\n");
+ }
+
+ chip->mode = mode;
+ chip->clk = CONFIG_FTSSP010_CLOCK;
+ chip->div = 2;
+ if (max_hz) {
+ while (chip->div < 0xffff) {
+ if ((chip->clk / (2 * chip->div)) <= max_hz)
+ break;
+ chip->div += 1;
+ }
+ }
+ chip->speed = chip->clk / (2 * chip->div);
+
+ return &chip->slave;
+
+free_out:
+ free(chip);
+ return NULL;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ free(slave);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ struct ftssp010_spi *chip = to_ftssp010_spi(slave);
+ struct ftssp010_regs *regs = chip->regs;
+
+ writel(CR1_SDL(8) | CR1_DIV(chip->div), &regs->cr[1]);
+
+ if (chip->revision >= 0x11900) {
+ writel(CR0_OPM_MASTER | CR0_FFMT_SPI | CR0_FSPO | CR0_FLASH,
+ &regs->cr[0]);
+ writel(CR2_TXFC | CR2_RXFC,
+ &regs->cr[2]);
+ } else {
+ writel(CR0_OPM_MASTER | CR0_FFMT_SPI | CR0_FSPO,
+ &regs->cr[0]);
+ writel(CR2_TXFC | CR2_RXFC | CR2_EN | CR2_TXDOE,
+ &regs->cr[2]);
+ }
+
+ if (chip->mode & SPI_LOOP)
+ setbits_le32(&regs->cr[0], CR0_LOOP);
+
+ if (chip->mode & SPI_CPOL)
+ setbits_le32(&regs->cr[0], CR0_SCLKPO);
+
+ if (chip->mode & SPI_CPHA)
+ setbits_le32(&regs->cr[0], CR0_SCLKPH);
+
+ spi_cs_deactivate(slave);
+
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+ struct ftssp010_spi *chip = to_ftssp010_spi(slave);
+ struct ftssp010_regs *regs = chip->regs;
+
+ writel(0, &regs->cr[2]);
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ struct ftssp010_spi *chip = to_ftssp010_spi(slave);
+ uint32_t len = bitlen >> 3;
+
+ if (flags & SPI_XFER_BEGIN)
+ spi_cs_activate(slave);
+
+ if (chip->revision >= 0x11900)
+ ftssp010_spi_work_transfer_v2(chip, dout, din, len, flags);
+ else
+ ftssp010_spi_work_transfer_v1(chip, dout, din, len, flags);
+
+ if (flags & SPI_XFER_END)
+ spi_cs_deactivate(slave);
+
+ return 0;
+}
diff --git a/drivers/spi/sh_qspi.c b/drivers/spi/sh_qspi.c
new file mode 100644
index 000000000..77ede6bba
--- /dev/null
+++ b/drivers/spi/sh_qspi.c
@@ -0,0 +1,278 @@
+/*
+ * SH QSPI (Quad SPI) driver
+ *
+ * Copyright (C) 2013 Renesas Electronics Corporation
+ * Copyright (C) 2013 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+#include <asm/arch/rmobile.h>
+#include <asm/io.h>
+
+/* SH QSPI register bit masks <REG>_<BIT> */
+#define SPCR_MSTR 0x08
+#define SPCR_SPE 0x40
+#define SPSR_SPRFF 0x80
+#define SPSR_SPTEF 0x20
+#define SPPCR_IO3FV 0x04
+#define SPPCR_IO2FV 0x02
+#define SPPCR_IO1FV 0x01
+#define SPBDCR_RXBC0 (1 << 0)
+#define SPCMD_SCKDEN (1 << 15)
+#define SPCMD_SLNDEN (1 << 14)
+#define SPCMD_SPNDEN (1 << 13)
+#define SPCMD_SSLKP (1 << 7)
+#define SPCMD_BRDV0 (1 << 2)
+#define SPCMD_INIT1 SPCMD_SCKDEN | SPCMD_SLNDEN | \
+ SPCMD_SPNDEN | SPCMD_SSLKP | \
+ SPCMD_BRDV0
+#define SPCMD_INIT2 SPCMD_SPNDEN | SPCMD_SSLKP | \
+ SPCMD_BRDV0
+#define SPBFCR_TXRST (1 << 7)
+#define SPBFCR_RXRST (1 << 6)
+
+/* SH QSPI register set */
+struct sh_qspi_regs {
+ unsigned char spcr;
+ unsigned char sslp;
+ unsigned char sppcr;
+ unsigned char spsr;
+ unsigned long spdr;
+ unsigned char spscr;
+ unsigned char spssr;
+ unsigned char spbr;
+ unsigned char spdcr;
+ unsigned char spckd;
+ unsigned char sslnd;
+ unsigned char spnd;
+ unsigned char dummy0;
+ unsigned short spcmd0;
+ unsigned short spcmd1;
+ unsigned short spcmd2;
+ unsigned short spcmd3;
+ unsigned char spbfcr;
+ unsigned char dummy1;
+ unsigned short spbdcr;
+ unsigned long spbmul0;
+ unsigned long spbmul1;
+ unsigned long spbmul2;
+ unsigned long spbmul3;
+};
+
+struct sh_qspi_slave {
+ struct spi_slave slave;
+ struct sh_qspi_regs *regs;
+};
+
+static inline struct sh_qspi_slave *to_sh_qspi(struct spi_slave *slave)
+{
+ return container_of(slave, struct sh_qspi_slave, slave);
+}
+
+static void sh_qspi_init(struct sh_qspi_slave *ss)
+{
+ /* QSPI initialize */
+ /* Set master mode only */
+ writeb(SPCR_MSTR, &ss->regs->spcr);
+
+ /* Set SSL signal level */
+ writeb(0x00, &ss->regs->sslp);
+
+ /* Set MOSI signal value when transfer is in idle state */
+ writeb(SPPCR_IO3FV|SPPCR_IO2FV, &ss->regs->sppcr);
+
+ /* Set bit rate. See 58.3.8 Quad Serial Peripheral Interface */
+ writeb(0x01, &ss->regs->spbr);
+
+ /* Disable Dummy Data Transmission */
+ writeb(0x00, &ss->regs->spdcr);
+
+ /* Set clock delay value */
+ writeb(0x00, &ss->regs->spckd);
+
+ /* Set SSL negation delay value */
+ writeb(0x00, &ss->regs->sslnd);
+
+ /* Set next-access delay value */
+ writeb(0x00, &ss->regs->spnd);
+
+ /* Set equence command */
+ writew(SPCMD_INIT2, &ss->regs->spcmd0);
+
+ /* Reset transfer and receive Buffer */
+ setbits_8(&ss->regs->spbfcr, SPBFCR_TXRST|SPBFCR_RXRST);
+
+ /* Clear transfer and receive Buffer control bit */
+ clrbits_8(&ss->regs->spbfcr, SPBFCR_TXRST|SPBFCR_RXRST);
+
+ /* Set equence control method. Use equence0 only */
+ writeb(0x00, &ss->regs->spscr);
+
+ /* Enable SPI function */
+ setbits_8(&ss->regs->spcr, SPCR_SPE);
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+ return 1;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+ struct sh_qspi_slave *ss = to_sh_qspi(slave);
+
+ /* Set master mode only */
+ writeb(SPCR_MSTR, &ss->regs->spcr);
+
+ /* Set command */
+ writew(SPCMD_INIT1, &ss->regs->spcmd0);
+
+ /* Reset transfer and receive Buffer */
+ setbits_8(&ss->regs->spbfcr, SPBFCR_TXRST|SPBFCR_RXRST);
+
+ /* Clear transfer and receive Buffer control bit */
+ clrbits_8(&ss->regs->spbfcr, SPBFCR_TXRST|SPBFCR_RXRST);
+
+ /* Set equence control method. Use equence0 only */
+ writeb(0x00, &ss->regs->spscr);
+
+ /* Enable SPI function */
+ setbits_8(&ss->regs->spcr, SPCR_SPE);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+ struct sh_qspi_slave *ss = to_sh_qspi(slave);
+
+ /* Disable SPI Function */
+ clrbits_8(&ss->regs->spcr, SPCR_SPE);
+}
+
+void spi_init(void)
+{
+ /* nothing to do */
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct sh_qspi_slave *ss;
+
+ if (!spi_cs_is_valid(bus, cs))
+ return NULL;
+
+ ss = spi_alloc_slave(struct sh_qspi_slave, bus, cs);
+ if (!ss) {
+ printf("SPI_error: Fail to allocate sh_qspi_slave\n");
+ return NULL;
+ }
+
+ ss->regs = (struct sh_qspi_regs *)SH_QSPI_BASE;
+
+ /* Init SH QSPI */
+ sh_qspi_init(ss);
+
+ return &ss->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ struct sh_qspi_slave *spi = to_sh_qspi(slave);
+
+ free(spi);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+ void *din, unsigned long flags)
+{
+ struct sh_qspi_slave *ss = to_sh_qspi(slave);
+ unsigned long nbyte;
+ int ret = 0;
+ unsigned char dtdata = 0, drdata;
+ unsigned char *tdata = &dtdata, *rdata = &drdata;
+ unsigned long *spbmul0 = &ss->regs->spbmul0;
+
+ if (dout == NULL && din == NULL) {
+ if (flags & SPI_XFER_END)
+ spi_cs_deactivate(slave);
+ return 0;
+ }
+
+ if (bitlen % 8) {
+ printf("%s: bitlen is not 8bit alined %d", __func__, bitlen);
+ return 1;
+ }
+
+ nbyte = bitlen / 8;
+
+ if (flags & SPI_XFER_BEGIN) {
+ spi_cs_activate(slave);
+
+ /* Set 1048576 byte */
+ writel(0x100000, spbmul0);
+ }
+
+ if (flags & SPI_XFER_END)
+ writel(nbyte, spbmul0);
+
+ if (dout != NULL)
+ tdata = (unsigned char *)dout;
+
+ if (din != NULL)
+ rdata = din;
+
+ while (nbyte > 0) {
+ while (!(readb(&ss->regs->spsr) & SPSR_SPTEF)) {
+ if (ctrlc()) {
+ puts("abort\n");
+ return 1;
+ }
+ udelay(10);
+ }
+
+ writeb(*tdata, (unsigned char *)(&ss->regs->spdr));
+
+ while ((readw(&ss->regs->spbdcr) != SPBDCR_RXBC0)) {
+ if (ctrlc()) {
+ puts("abort\n");
+ return 1;
+ }
+ udelay(1);
+ }
+
+ while (!(readb(&ss->regs->spsr) & SPSR_SPRFF)) {
+ if (ctrlc()) {
+ puts("abort\n");
+ return 1;
+ }
+ udelay(10);
+ }
+
+ *rdata = readb((unsigned char *)(&ss->regs->spdr));
+
+ if (dout != NULL)
+ tdata++;
+ if (din != NULL)
+ rdata++;
+
+ nbyte--;
+ }
+
+ if (flags & SPI_XFER_END)
+ spi_cs_deactivate(slave);
+
+ return ret;
+}
diff --git a/drivers/spi/sh_spi.c b/drivers/spi/sh_spi.c
index 744afe329..7ca5e363d 100644
--- a/drivers/spi/sh_spi.c
+++ b/drivers/spi/sh_spi.c
@@ -151,7 +151,6 @@ static int sh_spi_send(struct sh_spi *ss, const unsigned char *tx_data,
{
int i, cur_len, ret = 0;
int remain = (int)len;
- unsigned long tmp;
if (len >= SH_SPI_FIFO_SIZE)
sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);
@@ -183,9 +182,7 @@ static int sh_spi_send(struct sh_spi *ss, const unsigned char *tx_data,
}
if (flags & SPI_XFER_END) {
- tmp = sh_spi_read(&ss->regs->cr1);
- tmp = tmp & ~(SH_SPI_SSD | SH_SPI_SSDB);
- sh_spi_write(tmp, &ss->regs->cr1);
+ sh_spi_clear_bit(SH_SPI_SSD | SH_SPI_SSDB, &ss->regs->cr1);
sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);
udelay(100);
write_fifo_empty_wait(ss);
@@ -198,16 +195,13 @@ static int sh_spi_receive(struct sh_spi *ss, unsigned char *rx_data,
unsigned int len, unsigned long flags)
{
int i;
- unsigned long tmp;
if (len > SH_SPI_MAX_BYTE)
sh_spi_write(SH_SPI_MAX_BYTE, &ss->regs->cr3);
else
sh_spi_write(len, &ss->regs->cr3);
- tmp = sh_spi_read(&ss->regs->cr1);
- tmp = tmp & ~(SH_SPI_SSD | SH_SPI_SSDB);
- sh_spi_write(tmp, &ss->regs->cr1);
+ sh_spi_clear_bit(SH_SPI_SSD | SH_SPI_SSDB, &ss->regs->cr1);
sh_spi_set_bit(SH_SPI_SSA, &ss->regs->cr1);
for (i = 0; i < len; i++) {
diff --git a/drivers/spi/tegra114_spi.c b/drivers/spi/tegra114_spi.c
index 4d2af483d..810fa4718 100644
--- a/drivers/spi/tegra114_spi.c
+++ b/drivers/spi/tegra114_spi.c
@@ -289,9 +289,6 @@ int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
reg = readl(&regs->fifo_status);
writel(reg, &regs->fifo_status);
- /* clear ready bit */
- setbits_le32(&regs->xfer_status, SPI_XFER_STS_RDY);
-
clrsetbits_le32(&regs->command1, SPI_CMD1_CS_SW_VAL,
SPI_CMD1_RX_EN | SPI_CMD1_TX_EN | SPI_CMD1_LSBY_FE |
(slave->cs << SPI_CMD1_CS_SEL_SHIFT));
@@ -305,7 +302,6 @@ int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
/* handle data in 32-bit chunks */
while (num_bytes > 0) {
int bytes;
- int is_read = 0;
int tm, i;
tmpdout = 0;
@@ -319,6 +315,9 @@ int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
num_bytes -= bytes;
+ /* clear ready bit */
+ setbits_le32(&regs->xfer_status, SPI_XFER_STS_RDY);
+
clrsetbits_le32(&regs->command1,
SPI_CMD1_BIT_LEN_MASK << SPI_CMD1_BIT_LEN_SHIFT,
(bytes * 8 - 1) << SPI_CMD1_BIT_LEN_SHIFT);
@@ -329,20 +328,14 @@ int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
* Wait for SPI transmit FIFO to empty, or to time out.
* The RX FIFO status will be read and cleared last
*/
- for (tm = 0, is_read = 0; tm < SPI_TIMEOUT; ++tm) {
+ for (tm = 0; tm < SPI_TIMEOUT; ++tm) {
u32 fifo_status, xfer_status;
- fifo_status = readl(&regs->fifo_status);
-
- /* We can exit when we've had both RX and TX activity */
- if (is_read &&
- (fifo_status & SPI_FIFO_STS_TX_FIFO_EMPTY))
- break;
-
xfer_status = readl(&regs->xfer_status);
if (!(xfer_status & SPI_XFER_STS_RDY))
continue;
+ fifo_status = readl(&regs->fifo_status);
if (fifo_status & SPI_FIFO_STS_ERR) {
debug("%s: got a fifo error: ", __func__);
if (fifo_status & SPI_FIFO_STS_TX_FIFO_OVF)
@@ -367,7 +360,6 @@ int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
if (!(fifo_status & SPI_FIFO_STS_RX_FIFO_EMPTY)) {
tmpdin = readl(&regs->rx_fifo);
- is_read = 1;
/* swap bytes read in */
if (din != NULL) {
@@ -377,6 +369,9 @@ int tegra114_spi_xfer(struct spi_slave *slave, unsigned int bitlen,
}
din += bytes;
}
+
+ /* We can exit when we've had both RX and TX */
+ break;
}
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-30 15:18:11 +0000