+++ /dev/null
-/*
- * NVIDIA Tegra2 SPI-FLASH controller
- *
- * Copyright 2010-2011 NVIDIA Corporation
- *
- * This software may be used and distributed according to the
- * terms of the GNU Public License, Version 2, incorporated
- * herein by reference.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * Version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#ifndef _TEGRA2_SPI_H_
-#define _TEGRA2_SPI_H_
-
-#include <asm/types.h>
-
-struct spi_tegra {
- u32 command; /* SPI_COMMAND_0 register */
- u32 status; /* SPI_STATUS_0 register */
- u32 rx_cmp; /* SPI_RX_CMP_0 register */
- u32 dma_ctl; /* SPI_DMA_CTL_0 register */
- u32 tx_fifo; /* SPI_TX_FIFO_0 register */
- u32 rsvd[3]; /* offsets 0x14 to 0x1F reserved */
- u32 rx_fifo; /* SPI_RX_FIFO_0 register */
-};
-
-#define SPI_CMD_GO (1 << 30)
-#define SPI_CMD_ACTIVE_SCLK_SHIFT 26
-#define SPI_CMD_ACTIVE_SCLK_MASK (3 << SPI_CMD_ACTIVE_SCLK_SHIFT)
-#define SPI_CMD_CK_SDA (1 << 21)
-#define SPI_CMD_ACTIVE_SDA_SHIFT 18
-#define SPI_CMD_ACTIVE_SDA_MASK (3 << SPI_CMD_ACTIVE_SDA_SHIFT)
-#define SPI_CMD_CS_POL (1 << 16)
-#define SPI_CMD_TXEN (1 << 15)
-#define SPI_CMD_RXEN (1 << 14)
-#define SPI_CMD_CS_VAL (1 << 13)
-#define SPI_CMD_CS_SOFT (1 << 12)
-#define SPI_CMD_CS_DELAY (1 << 9)
-#define SPI_CMD_CS3_EN (1 << 8)
-#define SPI_CMD_CS2_EN (1 << 7)
-#define SPI_CMD_CS1_EN (1 << 6)
-#define SPI_CMD_CS0_EN (1 << 5)
-#define SPI_CMD_BIT_LENGTH (1 << 4)
-#define SPI_CMD_BIT_LENGTH_MASK 0x0000001F
-
-#define SPI_STAT_BSY (1 << 31)
-#define SPI_STAT_RDY (1 << 30)
-#define SPI_STAT_RXF_FLUSH (1 << 29)
-#define SPI_STAT_TXF_FLUSH (1 << 28)
-#define SPI_STAT_RXF_UNR (1 << 27)
-#define SPI_STAT_TXF_OVF (1 << 26)
-#define SPI_STAT_RXF_EMPTY (1 << 25)
-#define SPI_STAT_RXF_FULL (1 << 24)
-#define SPI_STAT_TXF_EMPTY (1 << 23)
-#define SPI_STAT_TXF_FULL (1 << 22)
-#define SPI_STAT_SEL_TXRX_N (1 << 16)
-#define SPI_STAT_CUR_BLKCNT (1 << 15)
-
-#define SPI_TIMEOUT 1000
-#define TEGRA2_SPI_MAX_FREQ 52000000
-
-
-#endif /* _TEGRA2_SPI_H_ */
--- /dev/null
+/*
+ * NVIDIA Tegra2 SPI-FLASH controller
+ *
+ * Copyright 2010-2012 NVIDIA Corporation
+ *
+ * This software may be used and distributed according to the
+ * terms of the GNU Public License, Version 2, incorporated
+ * herein by reference.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _TEGRA_SPI_H_
+#define _TEGRA_SPI_H_
+
+#include <asm/types.h>
+
+struct spi_tegra {
+ u32 command; /* SPI_COMMAND_0 register */
+ u32 status; /* SPI_STATUS_0 register */
+ u32 rx_cmp; /* SPI_RX_CMP_0 register */
+ u32 dma_ctl; /* SPI_DMA_CTL_0 register */
+ u32 tx_fifo; /* SPI_TX_FIFO_0 register */
+ u32 rsvd[3]; /* offsets 0x14 to 0x1F reserved */
+ u32 rx_fifo; /* SPI_RX_FIFO_0 register */
+};
+
+#define SPI_CMD_GO (1 << 30)
+#define SPI_CMD_ACTIVE_SCLK_SHIFT 26
+#define SPI_CMD_ACTIVE_SCLK_MASK (3 << SPI_CMD_ACTIVE_SCLK_SHIFT)
+#define SPI_CMD_CK_SDA (1 << 21)
+#define SPI_CMD_ACTIVE_SDA_SHIFT 18
+#define SPI_CMD_ACTIVE_SDA_MASK (3 << SPI_CMD_ACTIVE_SDA_SHIFT)
+#define SPI_CMD_CS_POL (1 << 16)
+#define SPI_CMD_TXEN (1 << 15)
+#define SPI_CMD_RXEN (1 << 14)
+#define SPI_CMD_CS_VAL (1 << 13)
+#define SPI_CMD_CS_SOFT (1 << 12)
+#define SPI_CMD_CS_DELAY (1 << 9)
+#define SPI_CMD_CS3_EN (1 << 8)
+#define SPI_CMD_CS2_EN (1 << 7)
+#define SPI_CMD_CS1_EN (1 << 6)
+#define SPI_CMD_CS0_EN (1 << 5)
+#define SPI_CMD_BIT_LENGTH (1 << 4)
+#define SPI_CMD_BIT_LENGTH_MASK 0x0000001F
+
+#define SPI_STAT_BSY (1 << 31)
+#define SPI_STAT_RDY (1 << 30)
+#define SPI_STAT_RXF_FLUSH (1 << 29)
+#define SPI_STAT_TXF_FLUSH (1 << 28)
+#define SPI_STAT_RXF_UNR (1 << 27)
+#define SPI_STAT_TXF_OVF (1 << 26)
+#define SPI_STAT_RXF_EMPTY (1 << 25)
+#define SPI_STAT_RXF_FULL (1 << 24)
+#define SPI_STAT_TXF_EMPTY (1 << 23)
+#define SPI_STAT_TXF_FULL (1 << 22)
+#define SPI_STAT_SEL_TXRX_N (1 << 16)
+#define SPI_STAT_CUR_BLKCNT (1 << 15)
+
+#define SPI_TIMEOUT 1000
+#define TEGRA2_SPI_MAX_FREQ 52000000
+
+#endif /* _TEGRA_SPI_H_ */
#include <asm/arch/pinmux.h>
#include <asm/arch/uart-spi-switch.h>
#include <asm/arch/tegra2.h>
-#include <asm/arch/tegra2_spi.h>
+#include <asm/arch/tegra_spi.h>
/* position of the UART/SPI select switch */
COBJS-$(CONFIG_SOFT_SPI) += soft_spi.o
COBJS-$(CONFIG_SH_SPI) += sh_spi.o
COBJS-$(CONFIG_FSL_ESPI) += fsl_espi.o
-COBJS-$(CONFIG_TEGRA2_SPI) += tegra2_spi.o
+COBJS-$(CONFIG_TEGRA_SPI) += tegra_spi.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
+++ /dev/null
-/*
- * Copyright (c) 2010-2011 NVIDIA Corporation
- * With help from the mpc8xxx SPI driver
- * With more help from omap3_spi SPI driver
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-
-#include <malloc.h>
-#include <spi.h>
-#include <asm/io.h>
-#include <asm/gpio.h>
-#include <asm/arch/clk_rst.h>
-#include <asm/arch/clock.h>
-#include <asm/arch/pinmux.h>
-#include <asm/arch/uart-spi-switch.h>
-#include <asm/arch/tegra2_spi.h>
-
-#if defined(CONFIG_SPI_CORRUPTS_UART)
- #define corrupt_delay() udelay(CONFIG_SPI_CORRUPTS_UART_DLY);
-#else
- #define corrupt_delay()
-#endif
-
-struct tegra_spi_slave {
- struct spi_slave slave;
- struct spi_tegra *regs;
- unsigned int freq;
- unsigned int mode;
-};
-
-static inline struct tegra_spi_slave *to_tegra_spi(struct spi_slave *slave)
-{
- return container_of(slave, struct tegra_spi_slave, slave);
-}
-
-int spi_cs_is_valid(unsigned int bus, unsigned int cs)
-{
- /* Tegra2 SPI-Flash - only 1 device ('bus/cs') */
- if (bus != 0 || cs != 0)
- return 0;
- else
- return 1;
-}
-
-struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
- unsigned int max_hz, unsigned int mode)
-{
- struct tegra_spi_slave *spi;
-
- if (!spi_cs_is_valid(bus, cs)) {
- printf("SPI error: unsupported bus %d / chip select %d\n",
- bus, cs);
- return NULL;
- }
-
- if (max_hz > TEGRA2_SPI_MAX_FREQ) {
- printf("SPI error: unsupported frequency %d Hz. Max frequency"
- " is %d Hz\n", max_hz, TEGRA2_SPI_MAX_FREQ);
- return NULL;
- }
-
- spi = malloc(sizeof(struct tegra_spi_slave));
- if (!spi) {
- printf("SPI error: malloc of SPI structure failed\n");
- return NULL;
- }
- spi->slave.bus = bus;
- spi->slave.cs = cs;
- spi->freq = max_hz;
- spi->regs = (struct spi_tegra *)TEGRA2_SPI_BASE;
- spi->mode = mode;
-
- return &spi->slave;
-}
-
-void spi_free_slave(struct spi_slave *slave)
-{
- struct tegra_spi_slave *spi = to_tegra_spi(slave);
-
- free(spi);
-}
-
-void spi_init(void)
-{
- /* do nothing */
-}
-
-int spi_claim_bus(struct spi_slave *slave)
-{
- struct tegra_spi_slave *spi = to_tegra_spi(slave);
- struct spi_tegra *regs = spi->regs;
- u32 reg;
-
- /* Change SPI clock to correct frequency, PLLP_OUT0 source */
- clock_start_periph_pll(PERIPH_ID_SPI1, CLOCK_ID_PERIPH, spi->freq);
-
- /* Clear stale status here */
- reg = SPI_STAT_RDY | SPI_STAT_RXF_FLUSH | SPI_STAT_TXF_FLUSH | \
- SPI_STAT_RXF_UNR | SPI_STAT_TXF_OVF;
- writel(reg, ®s->status);
- debug("spi_init: STATUS = %08x\n", readl(®s->status));
-
- /*
- * Use sw-controlled CS, so we can clock in data after ReadID, etc.
- */
- reg = (spi->mode & 1) << SPI_CMD_ACTIVE_SDA_SHIFT;
- if (spi->mode & 2)
- reg |= 1 << SPI_CMD_ACTIVE_SCLK_SHIFT;
- clrsetbits_le32(®s->command, SPI_CMD_ACTIVE_SCLK_MASK |
- SPI_CMD_ACTIVE_SDA_MASK, SPI_CMD_CS_SOFT | reg);
- debug("spi_init: COMMAND = %08x\n", readl(®s->command));
-
- /*
- * SPI pins on Tegra2 are muxed - change pinmux later due to UART
- * issue.
- */
- pinmux_set_func(PINGRP_GMD, PMUX_FUNC_SFLASH);
- pinmux_tristate_disable(PINGRP_LSPI);
-
-#ifndef CONFIG_SPI_UART_SWITCH
- /*
- * NOTE:
- * Only set PinMux bits 3:2 to SPI here on boards that don't have the
- * SPI UART switch or subsequent UART data won't go out! See
- * spi_uart_switch().
- */
- /* TODO: pinmux_set_func(PINGRP_GMC, PMUX_FUNC_SFLASH); */
-#endif
- return 0;
-}
-
-void spi_release_bus(struct spi_slave *slave)
-{
- /*
- * We can't release UART_DISABLE and set pinmux to UART4 here since
- * some code (e,g, spi_flash_probe) uses printf() while the SPI
- * bus is held. That is arguably bad, but it has the advantage of
- * already being in the source tree.
- */
-}
-
-void spi_cs_activate(struct spi_slave *slave)
-{
- struct tegra_spi_slave *spi = to_tegra_spi(slave);
-
- pinmux_select_spi();
-
- /* CS is negated on Tegra, so drive a 1 to get a 0 */
- setbits_le32(&spi->regs->command, SPI_CMD_CS_VAL);
-
- corrupt_delay(); /* Let UART settle */
-}
-
-void spi_cs_deactivate(struct spi_slave *slave)
-{
- struct tegra_spi_slave *spi = to_tegra_spi(slave);
-
- pinmux_select_uart();
-
- /* CS is negated on Tegra, so drive a 0 to get a 1 */
- clrbits_le32(&spi->regs->command, SPI_CMD_CS_VAL);
-
- corrupt_delay(); /* Let SPI settle */
-}
-
-int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
- const void *data_out, void *data_in, unsigned long flags)
-{
- struct tegra_spi_slave *spi = to_tegra_spi(slave);
- struct spi_tegra *regs = spi->regs;
- u32 reg, tmpdout, tmpdin = 0;
- const u8 *dout = data_out;
- u8 *din = data_in;
- int num_bytes;
- int ret;
-
- debug("spi_xfer: slave %u:%u dout %08X din %08X bitlen %u\n",
- slave->bus, slave->cs, *(u8 *)dout, *(u8 *)din, bitlen);
- if (bitlen % 8)
- return -1;
- num_bytes = bitlen / 8;
-
- ret = 0;
-
- reg = readl(®s->status);
- writel(reg, ®s->status); /* Clear all SPI events via R/W */
- debug("spi_xfer entry: STATUS = %08x\n", reg);
-
- reg = readl(®s->command);
- reg |= SPI_CMD_TXEN | SPI_CMD_RXEN;
- writel(reg, ®s->command);
- debug("spi_xfer: COMMAND = %08x\n", readl(®s->command));
-
- if (flags & SPI_XFER_BEGIN)
- spi_cs_activate(slave);
-
- /* handle data in 32-bit chunks */
- while (num_bytes > 0) {
- int bytes;
- int is_read = 0;
- int tm, i;
-
- tmpdout = 0;
- bytes = (num_bytes > 4) ? 4 : num_bytes;
-
- if (dout != NULL) {
- for (i = 0; i < bytes; ++i)
- tmpdout = (tmpdout << 8) | dout[i];
- }
-
- num_bytes -= bytes;
- if (dout)
- dout += bytes;
-
- clrsetbits_le32(®s->command, SPI_CMD_BIT_LENGTH_MASK,
- bytes * 8 - 1);
- writel(tmpdout, ®s->tx_fifo);
- setbits_le32(®s->command, SPI_CMD_GO);
-
- /*
- * 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) {
- u32 status;
-
- status = readl(®s->status);
-
- /* We can exit when we've had both RX and TX activity */
- if (is_read && (status & SPI_STAT_TXF_EMPTY))
- break;
-
- if ((status & (SPI_STAT_BSY | SPI_STAT_RDY)) !=
- SPI_STAT_RDY)
- tm++;
-
- else if (!(status & SPI_STAT_RXF_EMPTY)) {
- tmpdin = readl(®s->rx_fifo);
- is_read = 1;
-
- /* swap bytes read in */
- if (din != NULL) {
- for (i = bytes - 1; i >= 0; --i) {
- din[i] = tmpdin & 0xff;
- tmpdin >>= 8;
- }
- din += bytes;
- }
- }
- }
-
- if (tm >= SPI_TIMEOUT)
- ret = tm;
-
- /* clear ACK RDY, etc. bits */
- writel(readl(®s->status), ®s->status);
- }
-
- if (flags & SPI_XFER_END)
- spi_cs_deactivate(slave);
-
- debug("spi_xfer: transfer ended. Value=%08x, status = %08x\n",
- tmpdin, readl(®s->status));
-
- if (ret) {
- printf("spi_xfer: timeout during SPI transfer, tm %d\n", ret);
- return -1;
- }
-
- return 0;
-}
--- /dev/null
+/*
+ * Copyright (c) 2010-2012 NVIDIA Corporation
+ * With help from the mpc8xxx SPI driver
+ * With more help from omap3_spi SPI driver
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+#include <malloc.h>
+#include <spi.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/uart-spi-switch.h>
+#include <asm/arch/tegra_spi.h>
+
+#if defined(CONFIG_SPI_CORRUPTS_UART)
+ #define corrupt_delay() udelay(CONFIG_SPI_CORRUPTS_UART_DLY);
+#else
+ #define corrupt_delay()
+#endif
+
+struct tegra_spi_slave {
+ struct spi_slave slave;
+ struct spi_tegra *regs;
+ unsigned int freq;
+ unsigned int mode;
+};
+
+static inline struct tegra_spi_slave *to_tegra_spi(struct spi_slave *slave)
+{
+ return container_of(slave, struct tegra_spi_slave, slave);
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+ /* Tegra2 SPI-Flash - only 1 device ('bus/cs') */
+ if (bus != 0 || cs != 0)
+ return 0;
+ else
+ return 1;
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct tegra_spi_slave *spi;
+
+ if (!spi_cs_is_valid(bus, cs)) {
+ printf("SPI error: unsupported bus %d / chip select %d\n",
+ bus, cs);
+ return NULL;
+ }
+
+ if (max_hz > TEGRA2_SPI_MAX_FREQ) {
+ printf("SPI error: unsupported frequency %d Hz. Max frequency"
+ " is %d Hz\n", max_hz, TEGRA2_SPI_MAX_FREQ);
+ return NULL;
+ }
+
+ spi = malloc(sizeof(struct tegra_spi_slave));
+ if (!spi) {
+ printf("SPI error: malloc of SPI structure failed\n");
+ return NULL;
+ }
+ spi->slave.bus = bus;
+ spi->slave.cs = cs;
+ spi->freq = max_hz;
+ spi->regs = (struct spi_tegra *)TEGRA2_SPI_BASE;
+ spi->mode = mode;
+
+ return &spi->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ struct tegra_spi_slave *spi = to_tegra_spi(slave);
+
+ free(spi);
+}
+
+void spi_init(void)
+{
+ /* do nothing */
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ struct tegra_spi_slave *spi = to_tegra_spi(slave);
+ struct spi_tegra *regs = spi->regs;
+ u32 reg;
+
+ /* Change SPI clock to correct frequency, PLLP_OUT0 source */
+ clock_start_periph_pll(PERIPH_ID_SPI1, CLOCK_ID_PERIPH, spi->freq);
+
+ /* Clear stale status here */
+ reg = SPI_STAT_RDY | SPI_STAT_RXF_FLUSH | SPI_STAT_TXF_FLUSH | \
+ SPI_STAT_RXF_UNR | SPI_STAT_TXF_OVF;
+ writel(reg, ®s->status);
+ debug("spi_init: STATUS = %08x\n", readl(®s->status));
+
+ /*
+ * Use sw-controlled CS, so we can clock in data after ReadID, etc.
+ */
+ reg = (spi->mode & 1) << SPI_CMD_ACTIVE_SDA_SHIFT;
+ if (spi->mode & 2)
+ reg |= 1 << SPI_CMD_ACTIVE_SCLK_SHIFT;
+ clrsetbits_le32(®s->command, SPI_CMD_ACTIVE_SCLK_MASK |
+ SPI_CMD_ACTIVE_SDA_MASK, SPI_CMD_CS_SOFT | reg);
+ debug("spi_init: COMMAND = %08x\n", readl(®s->command));
+
+ /*
+ * SPI pins on Tegra2 are muxed - change pinmux later due to UART
+ * issue.
+ */
+ pinmux_set_func(PINGRP_GMD, PMUX_FUNC_SFLASH);
+ pinmux_tristate_disable(PINGRP_LSPI);
+
+#ifndef CONFIG_SPI_UART_SWITCH
+ /*
+ * NOTE:
+ * Only set PinMux bits 3:2 to SPI here on boards that don't have the
+ * SPI UART switch or subsequent UART data won't go out! See
+ * spi_uart_switch().
+ */
+ /* TODO: pinmux_set_func(PINGRP_GMC, PMUX_FUNC_SFLASH); */
+#endif
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+ /*
+ * We can't release UART_DISABLE and set pinmux to UART4 here since
+ * some code (e,g, spi_flash_probe) uses printf() while the SPI
+ * bus is held. That is arguably bad, but it has the advantage of
+ * already being in the source tree.
+ */
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+ struct tegra_spi_slave *spi = to_tegra_spi(slave);
+
+ pinmux_select_spi();
+
+ /* CS is negated on Tegra, so drive a 1 to get a 0 */
+ setbits_le32(&spi->regs->command, SPI_CMD_CS_VAL);
+
+ corrupt_delay(); /* Let UART settle */
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+ struct tegra_spi_slave *spi = to_tegra_spi(slave);
+
+ pinmux_select_uart();
+
+ /* CS is negated on Tegra, so drive a 0 to get a 1 */
+ clrbits_le32(&spi->regs->command, SPI_CMD_CS_VAL);
+
+ corrupt_delay(); /* Let SPI settle */
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
+ const void *data_out, void *data_in, unsigned long flags)
+{
+ struct tegra_spi_slave *spi = to_tegra_spi(slave);
+ struct spi_tegra *regs = spi->regs;
+ u32 reg, tmpdout, tmpdin = 0;
+ const u8 *dout = data_out;
+ u8 *din = data_in;
+ int num_bytes;
+ int ret;
+
+ debug("spi_xfer: slave %u:%u dout %08X din %08X bitlen %u\n",
+ slave->bus, slave->cs, *(u8 *)dout, *(u8 *)din, bitlen);
+ if (bitlen % 8)
+ return -1;
+ num_bytes = bitlen / 8;
+
+ ret = 0;
+
+ reg = readl(®s->status);
+ writel(reg, ®s->status); /* Clear all SPI events via R/W */
+ debug("spi_xfer entry: STATUS = %08x\n", reg);
+
+ reg = readl(®s->command);
+ reg |= SPI_CMD_TXEN | SPI_CMD_RXEN;
+ writel(reg, ®s->command);
+ debug("spi_xfer: COMMAND = %08x\n", readl(®s->command));
+
+ if (flags & SPI_XFER_BEGIN)
+ spi_cs_activate(slave);
+
+ /* handle data in 32-bit chunks */
+ while (num_bytes > 0) {
+ int bytes;
+ int is_read = 0;
+ int tm, i;
+
+ tmpdout = 0;
+ bytes = (num_bytes > 4) ? 4 : num_bytes;
+
+ if (dout != NULL) {
+ for (i = 0; i < bytes; ++i)
+ tmpdout = (tmpdout << 8) | dout[i];
+ }
+
+ num_bytes -= bytes;
+ if (dout)
+ dout += bytes;
+
+ clrsetbits_le32(®s->command, SPI_CMD_BIT_LENGTH_MASK,
+ bytes * 8 - 1);
+ writel(tmpdout, ®s->tx_fifo);
+ setbits_le32(®s->command, SPI_CMD_GO);
+
+ /*
+ * 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) {
+ u32 status;
+
+ status = readl(®s->status);
+
+ /* We can exit when we've had both RX and TX activity */
+ if (is_read && (status & SPI_STAT_TXF_EMPTY))
+ break;
+
+ if ((status & (SPI_STAT_BSY | SPI_STAT_RDY)) !=
+ SPI_STAT_RDY)
+ tm++;
+
+ else if (!(status & SPI_STAT_RXF_EMPTY)) {
+ tmpdin = readl(®s->rx_fifo);
+ is_read = 1;
+
+ /* swap bytes read in */
+ if (din != NULL) {
+ for (i = bytes - 1; i >= 0; --i) {
+ din[i] = tmpdin & 0xff;
+ tmpdin >>= 8;
+ }
+ din += bytes;
+ }
+ }
+ }
+
+ if (tm >= SPI_TIMEOUT)
+ ret = tm;
+
+ /* clear ACK RDY, etc. bits */
+ writel(readl(®s->status), ®s->status);
+ }
+
+ if (flags & SPI_XFER_END)
+ spi_cs_deactivate(slave);
+
+ debug("spi_xfer: transfer ended. Value=%08x, status = %08x\n",
+ tmpdin, readl(®s->status));
+
+ if (ret) {
+ printf("spi_xfer: timeout during SPI transfer, tm %d\n", ret);
+ return -1;
+ }
+
+ return 0;
+}
#define CONFIG_BOARD_EARLY_INIT_F
/* SPI */
-#define CONFIG_TEGRA2_SPI
+#define CONFIG_TEGRA_SPI
#define CONFIG_SPI_FLASH
#define CONFIG_SPI_FLASH_WINBOND
#define CONFIG_SF_DEFAULT_MODE SPI_MODE_0
projects / oweals / u-boot.git / commitdiff