+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2009
* Marvell Semiconductor <www.marvell.com>
* Written-by: Prafulla Wadaskar <prafulla@marvell.com>
*
* Derived from drivers/spi/mpc8xxx_spi.c
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
+#include <log.h>
#include <malloc.h>
#include <spi.h>
#include <asm/io.h>
#include <asm/arch/soc.h>
-#ifdef CONFIG_KIRKWOOD
+#ifdef CONFIG_ARCH_KIRKWOOD
#include <asm/arch/mpp.h>
#endif
#include <asm/arch-mvebu/spi.h>
static struct kwspi_registers *spireg =
(struct kwspi_registers *)MVEBU_SPI_BASE;
-#ifdef CONFIG_KIRKWOOD
+#ifdef CONFIG_ARCH_KIRKWOOD
static u32 cs_spi_mpp_back[2];
#endif
{
struct spi_slave *slave;
u32 data;
-#ifdef CONFIG_KIRKWOOD
+#ifdef CONFIG_ARCH_KIRKWOOD
static const u32 kwspi_mpp_config[2][2] = {
{ MPP0_SPI_SCn, 0 }, /* if cs == 0 */
{ MPP7_SPI_SCn, 0 } /* if cs != 0 */
writel(KWSPI_SMEMRDIRQ, &spireg->irq_cause);
writel(KWSPI_IRQMASK, &spireg->irq_mask);
-#ifdef CONFIG_KIRKWOOD
+#ifdef CONFIG_ARCH_KIRKWOOD
/* program mpp registers to select SPI_CSn */
kirkwood_mpp_conf(kwspi_mpp_config[cs ? 1 : 0], cs_spi_mpp_back);
#endif
void spi_free_slave(struct spi_slave *slave)
{
-#ifdef CONFIG_KIRKWOOD
+#ifdef CONFIG_ARCH_KIRKWOOD
kirkwood_mpp_conf(cs_spi_mpp_back, NULL);
#endif
free(slave);
}
-#if defined(CONFIG_SYS_KW_SPI_MPP)
-u32 spi_mpp_backup[4];
-#endif
-
__attribute__((weak)) int board_spi_claim_bus(struct spi_slave *slave)
{
return 0;
int spi_claim_bus(struct spi_slave *slave)
{
-#if defined(CONFIG_SYS_KW_SPI_MPP)
- u32 config;
- u32 spi_mpp_config[4];
-
- config = CONFIG_SYS_KW_SPI_MPP;
-
- if (config & MOSI_MPP6)
- spi_mpp_config[0] = MPP6_SPI_MOSI;
- else
- spi_mpp_config[0] = MPP1_SPI_MOSI;
-
- if (config & SCK_MPP10)
- spi_mpp_config[1] = MPP10_SPI_SCK;
- else
- spi_mpp_config[1] = MPP2_SPI_SCK;
-
- if (config & MISO_MPP11)
- spi_mpp_config[2] = MPP11_SPI_MISO;
- else
- spi_mpp_config[2] = MPP3_SPI_MISO;
-
- spi_mpp_config[3] = 0;
- spi_mpp_backup[3] = 0;
-
- /* set new spi mpp and save current mpp config */
- kirkwood_mpp_conf(spi_mpp_config, spi_mpp_backup);
-#endif
-
return board_spi_claim_bus(slave);
}
void spi_release_bus(struct spi_slave *slave)
{
-#if defined(CONFIG_SYS_KW_SPI_MPP)
- kirkwood_mpp_conf(spi_mpp_backup, NULL);
-#endif
-
board_spi_release_bus(slave);
}
}
#endif
-void spi_init(void)
-{
-}
-
void spi_cs_activate(struct spi_slave *slave)
{
_spi_cs_activate(spireg);
/* Here now the DM part */
+struct mvebu_spi_dev {
+ bool is_errata_50mhz_ac;
+};
+
struct mvebu_spi_platdata {
struct kwspi_registers *spireg;
+ bool is_errata_50mhz_ac;
};
struct mvebu_spi_priv {
return 0;
}
+static void mvebu_spi_50mhz_ac_timing_erratum(struct udevice *bus, uint mode)
+{
+ struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
+ struct kwspi_registers *reg = plat->spireg;
+ u32 data;
+
+ /*
+ * Erratum description: (Erratum NO. FE-9144572) The device
+ * SPI interface supports frequencies of up to 50 MHz.
+ * However, due to this erratum, when the device core clock is
+ * 250 MHz and the SPI interfaces is configured for 50MHz SPI
+ * clock and CPOL=CPHA=1 there might occur data corruption on
+ * reads from the SPI device.
+ * Erratum Workaround:
+ * Work in one of the following configurations:
+ * 1. Set CPOL=CPHA=0 in "SPI Interface Configuration
+ * Register".
+ * 2. Set TMISO_SAMPLE value to 0x2 in "SPI Timing Parameters 1
+ * Register" before setting the interface.
+ */
+ data = readl(®->timing1);
+ data &= ~KW_SPI_TMISO_SAMPLE_MASK;
+
+ if (CONFIG_SYS_TCLK == 250000000 &&
+ mode & SPI_CPOL &&
+ mode & SPI_CPHA)
+ data |= KW_SPI_TMISO_SAMPLE_2;
+ else
+ data |= KW_SPI_TMISO_SAMPLE_1;
+
+ writel(data, ®->timing1);
+}
+
static int mvebu_spi_set_mode(struct udevice *bus, uint mode)
{
+ struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
+ struct kwspi_registers *reg = plat->spireg;
+ u32 data = readl(®->cfg);
+
+ data &= ~(KWSPI_CPHA | KWSPI_CPOL | KWSPI_RXLSBF | KWSPI_TXLSBF);
+
+ if (mode & SPI_CPHA)
+ data |= KWSPI_CPHA;
+ if (mode & SPI_CPOL)
+ data |= KWSPI_CPOL;
+ if (mode & SPI_LSB_FIRST)
+ data |= (KWSPI_RXLSBF | KWSPI_TXLSBF);
+
+ writel(data, ®->cfg);
+
+ if (plat->is_errata_50mhz_ac)
+ mvebu_spi_50mhz_ac_timing_erratum(bus, mode);
+
return 0;
}
return _spi_xfer(plat->spireg, bitlen, dout, din, flags);
}
+__attribute__((weak)) int mvebu_board_spi_claim_bus(struct udevice *dev)
+{
+ return 0;
+}
+
+static int mvebu_spi_claim_bus(struct udevice *dev)
+{
+ struct udevice *bus = dev->parent;
+ struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
+
+ /* Configure the chip-select in the CTRL register */
+ clrsetbits_le32(&plat->spireg->ctrl,
+ KWSPI_CS_MASK << KWSPI_CS_SHIFT,
+ spi_chip_select(dev) << KWSPI_CS_SHIFT);
+
+ return mvebu_board_spi_claim_bus(dev);
+}
+
+__attribute__((weak)) int mvebu_board_spi_release_bus(struct udevice *dev)
+{
+ return 0;
+}
+
+static int mvebu_spi_release_bus(struct udevice *dev)
+{
+ return mvebu_board_spi_release_bus(dev);
+}
+
static int mvebu_spi_probe(struct udevice *bus)
{
struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
static int mvebu_spi_ofdata_to_platdata(struct udevice *bus)
{
struct mvebu_spi_platdata *plat = dev_get_platdata(bus);
+ const struct mvebu_spi_dev *drvdata =
+ (struct mvebu_spi_dev *)dev_get_driver_data(bus);
- plat->spireg = (struct kwspi_registers *)dev_get_addr(bus);
+ plat->spireg = (struct kwspi_registers *)devfdt_get_addr(bus);
+ plat->is_errata_50mhz_ac = drvdata->is_errata_50mhz_ac;
return 0;
}
static const struct dm_spi_ops mvebu_spi_ops = {
+ .claim_bus = mvebu_spi_claim_bus,
+ .release_bus = mvebu_spi_release_bus,
.xfer = mvebu_spi_xfer,
.set_speed = mvebu_spi_set_speed,
.set_mode = mvebu_spi_set_mode,
*/
};
+static const struct mvebu_spi_dev armada_spi_dev_data = {
+ .is_errata_50mhz_ac = false,
+};
+
+static const struct mvebu_spi_dev armada_xp_spi_dev_data = {
+ .is_errata_50mhz_ac = false,
+};
+
+static const struct mvebu_spi_dev armada_375_spi_dev_data = {
+ .is_errata_50mhz_ac = false,
+};
+
+static const struct mvebu_spi_dev armada_380_spi_dev_data = {
+ .is_errata_50mhz_ac = true,
+};
+
static const struct udevice_id mvebu_spi_ids[] = {
- { .compatible = "marvell,armada-380-spi" },
- { .compatible = "marvell,armada-xp-spi" },
+ {
+ .compatible = "marvell,orion-spi",
+ .data = (ulong)&armada_spi_dev_data,
+ },
+ {
+ .compatible = "marvell,armada-375-spi",
+ .data = (ulong)&armada_375_spi_dev_data
+ },
+ {
+ .compatible = "marvell,armada-380-spi",
+ .data = (ulong)&armada_380_spi_dev_data
+ },
+ {
+ .compatible = "marvell,armada-xp-spi",
+ .data = (ulong)&armada_xp_spi_dev_data
+ },
{ }
};
projects / oweals / u-boot.git / blobdiff