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-rw-r--r--drivers/mtd/spi/atmel.c10
-rw-r--r--drivers/mtd/spi/eon.c3
-rw-r--r--drivers/mtd/spi/gigadevice.c2
-rw-r--r--drivers/mtd/spi/ramtron.c8
-rw-r--r--drivers/mtd/spi/spansion.c5
-rw-r--r--drivers/mtd/spi/spi_flash.c11
-rw-r--r--drivers/mtd/spi/spi_spl_load.c2
-rw-r--r--drivers/mtd/spi/sst.c40
-rw-r--r--drivers/mtd/spi/stmicro.c12
-rw-r--r--drivers/mtd/spi/winbond.c2
-rw-r--r--drivers/spi/Makefile1
-rw-r--r--drivers/spi/fsl_espi.c6
-rw-r--r--drivers/spi/mpc8xxx_spi.c2
-rw-r--r--drivers/spi/zynq_spi.c280
14 files changed, 340 insertions, 44 deletions
diff --git a/drivers/mtd/spi/atmel.c b/drivers/mtd/spi/atmel.c
index 6a92c4b..f34df43 100644
--- a/drivers/mtd/spi/atmel.c
+++ b/drivers/mtd/spi/atmel.c
@@ -252,7 +252,7 @@ static int dataflash_write_p2(struct spi_flash *flash,
}
debug("SF: AT45: Successfully programmed %zu bytes @ 0x%x\n",
- len, offset);
+ len, offset);
ret = 0;
out:
@@ -325,7 +325,7 @@ static int dataflash_write_at45(struct spi_flash *flash,
}
debug("SF: AT45: Successfully programmed %zu bytes @ 0x%x\n",
- len, offset);
+ len, offset);
ret = 0;
out:
@@ -387,7 +387,7 @@ static int dataflash_erase_p2(struct spi_flash *flash, u32 offset, size_t len)
}
debug("SF: AT45: Successfully erased %zu bytes @ 0x%x\n",
- len, offset);
+ len, offset);
ret = 0;
out:
@@ -450,7 +450,7 @@ static int dataflash_erase_at45(struct spi_flash *flash, u32 offset, size_t len)
}
debug("SF: AT45: Successfully erased %zu bytes @ 0x%x\n",
- len, offset);
+ len, offset);
ret = 0;
out:
@@ -476,7 +476,7 @@ struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode)
if (i == ARRAY_SIZE(atmel_spi_flash_table)) {
debug("SF: Unsupported DataFlash ID %02x\n",
- idcode[1]);
+ idcode[1]);
return NULL;
}
diff --git a/drivers/mtd/spi/eon.c b/drivers/mtd/spi/eon.c
index b16e7ab..25cfc12 100644
--- a/drivers/mtd/spi/eon.c
+++ b/drivers/mtd/spi/eon.c
@@ -54,8 +54,7 @@ struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
flash->page_size = 256;
flash->sector_size = 256 * 16 * 16;
- flash->size = 256 * 16
- * params->nr_sectors;
+ flash->size = 256 * 16 * params->nr_sectors;
return flash;
}
diff --git a/drivers/mtd/spi/gigadevice.c b/drivers/mtd/spi/gigadevice.c
index 950c777..b42581a 100644
--- a/drivers/mtd/spi/gigadevice.c
+++ b/drivers/mtd/spi/gigadevice.c
@@ -45,7 +45,7 @@ struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode)
if (i == ARRAY_SIZE(gigadevice_spi_flash_table)) {
debug("SF: Unsupported Gigadevice ID %02x%02x\n",
- idcode[1], idcode[2]);
+ idcode[1], idcode[2]);
return NULL;
}
diff --git a/drivers/mtd/spi/ramtron.c b/drivers/mtd/spi/ramtron.c
index f67ddd6..38f9d69 100644
--- a/drivers/mtd/spi/ramtron.c
+++ b/drivers/mtd/spi/ramtron.c
@@ -230,7 +230,8 @@ struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode)
/* JEDEC conformant RAMTRON id */
for (i = 0; i < ARRAY_SIZE(ramtron_spi_fram_table); i++) {
params = &ramtron_spi_fram_table[i];
- if (idcode[1] == params->id1 && idcode[2] == params->id2)
+ if (idcode[1] == params->id1 &&
+ idcode[2] == params->id2)
goto found;
}
break;
@@ -251,7 +252,8 @@ struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode)
/* now find the device */
for (i = 0; i < ARRAY_SIZE(ramtron_spi_fram_table); i++) {
params = &ramtron_spi_fram_table[i];
- if (!strcmp(params->name, CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC))
+ if (!strcmp(params->name,
+ CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC))
goto found;
}
debug("SF: Unsupported non-JEDEC RAMTRON device "
@@ -264,7 +266,7 @@ struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode)
/* arriving here means no method has found a device we can handle */
debug("SF/ramtron: unsupported device id0=%02x id1=%02x id2=%02x\n",
- idcode[0], idcode[1], idcode[2]);
+ idcode[0], idcode[1], idcode[2]);
return NULL;
found:
diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c
index 47a4897..fa7ac8c 100644
--- a/drivers/mtd/spi/spansion.c
+++ b/drivers/mtd/spi/spansion.c
@@ -6,7 +6,7 @@
* TsiChung Liew (Tsi-Chung.Liew@freescale.com),
* and Jason McMullan (mcmullan@netapp.com)
*
- * SPDX-License-Identifier: GPL-2.0+
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
@@ -122,7 +122,8 @@ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
}
if (i == ARRAY_SIZE(spansion_spi_flash_table)) {
- debug("SF: Unsupported SPANSION ID %04x %04x\n", jedec, ext_jedec);
+ debug("SF: Unsupported SPANSION ID %04x %04x\n",
+ jedec, ext_jedec);
return NULL;
}
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 6a6fe37..9814395 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -40,12 +40,13 @@ static int spi_flash_read_write(struct spi_slave *spi,
ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
if (ret) {
debug("SF: Failed to send command (%zu bytes): %d\n",
- cmd_len, ret);
+ cmd_len, ret);
} else if (data_len != 0) {
- ret = spi_xfer(spi, data_len * 8, data_out, data_in, SPI_XFER_END);
+ ret = spi_xfer(spi, data_len * 8, data_out, data_in,
+ SPI_XFER_END);
if (ret)
debug("SF: Failed to transfer %zu bytes of data: %d\n",
- data_len, ret);
+ data_len, ret);
}
return ret;
@@ -86,7 +87,7 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
if (ret) {
debug("SF: fail to read %s status register\n",
- cmd == CMD_READ_STATUS ? "read" : "flag");
+ cmd == CMD_READ_STATUS ? "read" : "flag");
return ret;
}
@@ -144,7 +145,7 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
ret = spi_flash_cmd_wait_ready(flash, timeout);
if (ret < 0) {
debug("SF: write %s timed out\n",
- timeout == SPI_FLASH_PROG_TIMEOUT ?
+ timeout == SPI_FLASH_PROG_TIMEOUT ?
"program" : "page erase");
return ret;
}
diff --git a/drivers/mtd/spi/spi_spl_load.c b/drivers/mtd/spi/spi_spl_load.c
index 7c799ca..2935530 100644
--- a/drivers/mtd/spi/spi_spl_load.c
+++ b/drivers/mtd/spi/spi_spl_load.c
@@ -39,7 +39,7 @@ void spl_spi_load_image(void)
/* Load u-boot, mkimage header is 64 bytes. */
spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40,
- (void *) header);
+ (void *)header);
spl_parse_image_header(header);
spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
spl_image.size, (void *)spl_image.load_addr);
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c
index 95f5490..256867c 100644
--- a/drivers/mtd/spi/sst.c
+++ b/drivers/mtd/spi/sst.c
@@ -19,7 +19,7 @@
#include "spi_flash_internal.h"
#define CMD_SST_BP 0x02 /* Byte Program */
-#define CMD_SST_AAI_WP 0xAD /* Auto Address Increment Word Program */
+#define CMD_SST_AAI_WP 0xAD /* Auto Address Incr Word Program */
#define SST_SR_WIP (1 << 0) /* Write-in-Progress */
#define SST_SR_WEL (1 << 1) /* Write enable */
@@ -50,47 +50,61 @@ static const struct sst_spi_flash_params sst_spi_flash_table[] = {
.flags = SST_FEAT_WP,
.nr_sectors = 128,
.name = "SST25VF040B",
- },{
+ },
+ {
.idcode1 = 0x8e,
.flags = SST_FEAT_WP,
.nr_sectors = 256,
.name = "SST25VF080B",
- },{
+ },
+ {
.idcode1 = 0x41,
.flags = SST_FEAT_WP,
.nr_sectors = 512,
.name = "SST25VF016B",
- },{
+ },
+ {
.idcode1 = 0x4a,
.flags = SST_FEAT_WP,
.nr_sectors = 1024,
.name = "SST25VF032B",
- },{
+ },
+ {
.idcode1 = 0x4b,
.flags = SST_FEAT_MBP,
.nr_sectors = 2048,
.name = "SST25VF064C",
- },{
+ },
+ {
.idcode1 = 0x01,
.flags = SST_FEAT_WP,
.nr_sectors = 16,
.name = "SST25WF512",
- },{
+ },
+ {
.idcode1 = 0x02,
.flags = SST_FEAT_WP,
.nr_sectors = 32,
.name = "SST25WF010",
- },{
+ },
+ {
.idcode1 = 0x03,
.flags = SST_FEAT_WP,
.nr_sectors = 64,
.name = "SST25WF020",
- },{
+ },
+ {
.idcode1 = 0x04,
.flags = SST_FEAT_WP,
.nr_sectors = 128,
.name = "SST25WF040",
},
+ {
+ .idcode1 = 0x05,
+ .flags = SST_FEAT_WP,
+ .nr_sectors = 256,
+ .name = "SST25WF080",
+ },
};
static int
@@ -105,7 +119,7 @@ sst_byte_write(struct spi_flash *flash, u32 offset, const void *buf)
};
debug("BP[%02x]: 0x%p => cmd = { 0x%02x 0x%06x }\n",
- spi_w8r8(flash->spi, CMD_READ_STATUS), buf, cmd[0], offset);
+ spi_w8r8(flash->spi, CMD_READ_STATUS), buf, cmd[0], offset);
ret = spi_flash_cmd_write_enable(flash);
if (ret)
@@ -152,11 +166,11 @@ sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, const void *buf)
for (; actual < len - 1; actual += 2) {
debug("WP[%02x]: 0x%p => cmd = { 0x%02x 0x%06x }\n",
- spi_w8r8(flash->spi, CMD_READ_STATUS), buf + actual, cmd[0],
- offset);
+ spi_w8r8(flash->spi, CMD_READ_STATUS), buf + actual,
+ cmd[0], offset);
ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len,
- buf + actual, 2);
+ buf + actual, 2);
if (ret) {
debug("SF: sst word program failed\n");
break;
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c
index 0ca00f1..c5fa64e 100644
--- a/drivers/mtd/spi/stmicro.c
+++ b/drivers/mtd/spi/stmicro.c
@@ -8,7 +8,7 @@
* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*
- * SPDX-License-Identifier: GPL-2.0+
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
@@ -18,7 +18,7 @@
#include "spi_flash_internal.h"
/* M25Pxx-specific commands */
-#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
+#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
struct stmicro_spi_flash_params {
u16 id;
@@ -150,7 +150,7 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
},
};
-struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
+struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode)
{
const struct stmicro_spi_flash_params *params;
struct spi_flash *flash;
@@ -166,17 +166,17 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
idcode[0] = 0x20;
idcode[1] = 0x20;
idcode[2] = idcode[3] + 1;
- } else
+ } else {
return NULL;
+ }
}
id = ((idcode[1] << 8) | idcode[2]);
for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
params = &stmicro_spi_flash_table[i];
- if (params->id == id) {
+ if (params->id == id)
break;
- }
}
if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
diff --git a/drivers/mtd/spi/winbond.c b/drivers/mtd/spi/winbond.c
index c399bf1..b31911a 100644
--- a/drivers/mtd/spi/winbond.c
+++ b/drivers/mtd/spi/winbond.c
@@ -123,7 +123,7 @@ struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
debug("SF: Unsupported Winbond ID %02x%02x\n",
- idcode[1], idcode[2]);
+ idcode[1], idcode[2]);
return NULL;
}
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 019132e..91d24ce 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -39,6 +39,7 @@ COBJS-$(CONFIG_TEGRA20_SFLASH) += tegra20_sflash.o
COBJS-$(CONFIG_TEGRA20_SLINK) += tegra20_slink.o
COBJS-$(CONFIG_TEGRA114_SPI) += tegra114_spi.o
COBJS-$(CONFIG_XILINX_SPI) += xilinx_spi.o
+COBJS-$(CONFIG_ZYNQ_SPI) += zynq_spi.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/spi/fsl_espi.c b/drivers/spi/fsl_espi.c
index fc0a58b..c883d3c 100644
--- a/drivers/spi/fsl_espi.c
+++ b/drivers/spi/fsl_espi.c
@@ -221,15 +221,13 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *data_out,
slave->bus, slave->cs, *(uint *) dout,
dout, *(uint *) din, din, len);
- num_chunks = data_len / max_tran_len +
- (data_len % max_tran_len ? 1 : 0);
+ num_chunks = DIV_ROUND_UP(data_len, max_tran_len);
while (num_chunks--) {
if (data_in)
din = buffer + rx_offset;
dout = buffer;
tran_len = min(data_len , max_tran_len);
- num_blks = (tran_len + cmd_len) / 4 +
- ((tran_len + cmd_len) % 4 ? 1 : 0);
+ num_blks = DIV_ROUND_UP(tran_len + cmd_len, 4);
num_bytes = (tran_len + cmd_len) % 4;
fsl->data_len = tran_len + cmd_len;
spi_cs_activate(slave);
diff --git a/drivers/spi/mpc8xxx_spi.c b/drivers/spi/mpc8xxx_spi.c
index bbfc259..348361a 100644
--- a/drivers/spi/mpc8xxx_spi.c
+++ b/drivers/spi/mpc8xxx_spi.c
@@ -77,7 +77,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
{
volatile spi8xxx_t *spi = &((immap_t *) (CONFIG_SYS_IMMR))->spi;
unsigned int tmpdout, tmpdin, event;
- int numBlks = bitlen / 32 + (bitlen % 32 ? 1 : 0);
+ int numBlks = DIV_ROUND_UP(bitlen, 32);
int tm, isRead = 0;
unsigned char charSize = 32;
diff --git a/drivers/spi/zynq_spi.c b/drivers/spi/zynq_spi.c
new file mode 100644
index 0000000..5da8759
--- /dev/null
+++ b/drivers/spi/zynq_spi.c
@@ -0,0 +1,280 @@
+/*
+ * (C) Copyright 2013 Inc.
+ *
+ * Xilinx Zynq PS SPI controller driver (master mode only)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <malloc.h>
+#include <spi.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+
+/* zynq spi register bit masks ZYNQ_SPI_<REG>_<BIT>_MASK */
+#define ZYNQ_SPI_CR_MSA_MASK (1 << 15) /* Manual start enb */
+#define ZYNQ_SPI_CR_MCS_MASK (1 << 14) /* Manual chip select */
+#define ZYNQ_SPI_CR_CS_MASK (0xF << 10) /* Chip select */
+#define ZYNQ_SPI_CR_BRD_MASK (0x7 << 3) /* Baud rate div */
+#define ZYNQ_SPI_CR_CPHA_MASK (1 << 2) /* Clock phase */
+#define ZYNQ_SPI_CR_CPOL_MASK (1 << 1) /* Clock polarity */
+#define ZYNQ_SPI_CR_MSTREN_MASK (1 << 0) /* Mode select */
+#define ZYNQ_SPI_IXR_RXNEMPTY_MASK (1 << 4) /* RX_FIFO_not_empty */
+#define ZYNQ_SPI_IXR_TXOW_MASK (1 << 2) /* TX_FIFO_not_full */
+#define ZYNQ_SPI_IXR_ALL_MASK 0x7F /* All IXR bits */
+#define ZYNQ_SPI_ENR_SPI_EN_MASK (1 << 0) /* SPI Enable */
+
+#define ZYNQ_SPI_FIFO_DEPTH 128
+#ifndef CONFIG_SYS_ZYNQ_SPI_WAIT
+#define CONFIG_SYS_ZYNQ_SPI_WAIT (CONFIG_SYS_HZ/100) /* 10 ms */
+#endif
+
+/* zynq spi register set */
+struct zynq_spi_regs {
+ u32 cr; /* 0x00 */
+ u32 isr; /* 0x04 */
+ u32 ier; /* 0x08 */
+ u32 idr; /* 0x0C */
+ u32 imr; /* 0x10 */
+ u32 enr; /* 0x14 */
+ u32 dr; /* 0x18 */
+ u32 txdr; /* 0x1C */
+ u32 rxdr; /* 0x20 */
+};
+
+/* zynq spi slave */
+struct zynq_spi_slave {
+ struct spi_slave slave;
+ struct zynq_spi_regs *base;
+ u8 mode;
+ u8 fifo_depth;
+ u32 speed_hz;
+ u32 input_hz;
+ u32 req_hz;
+};
+
+static inline struct zynq_spi_slave *to_zynq_spi_slave(struct spi_slave *slave)
+{
+ return container_of(slave, struct zynq_spi_slave, slave);
+}
+
+static inline struct zynq_spi_regs *get_zynq_spi_base(int dev)
+{
+ if (dev)
+ return (struct zynq_spi_regs *)ZYNQ_SPI_BASEADDR1;
+ else
+ return (struct zynq_spi_regs *)ZYNQ_SPI_BASEADDR0;
+}
+
+static void zynq_spi_init_hw(struct zynq_spi_slave *zslave)
+{
+ u32 confr;
+
+ /* Disable SPI */
+ writel(~ZYNQ_SPI_ENR_SPI_EN_MASK, &zslave->base->enr);
+
+ /* Disable Interrupts */
+ writel(ZYNQ_SPI_IXR_ALL_MASK, &zslave->base->idr);
+
+ /* Clear RX FIFO */
+ while (readl(&zslave->base->isr) &
+ ZYNQ_SPI_IXR_RXNEMPTY_MASK)
+ readl(&zslave->base->rxdr);
+
+ /* Clear Interrupts */
+ writel(ZYNQ_SPI_IXR_ALL_MASK, &zslave->base->isr);
+
+ /* Manual slave select and Auto start */
+ confr = ZYNQ_SPI_CR_MCS_MASK | ZYNQ_SPI_CR_CS_MASK |
+ ZYNQ_SPI_CR_MSTREN_MASK;
+ confr &= ~ZYNQ_SPI_CR_MSA_MASK;
+ writel(confr, &zslave->base->cr);
+
+ /* Enable SPI */
+ writel(ZYNQ_SPI_ENR_SPI_EN_MASK, &zslave->base->enr);
+}
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+ /* 2 bus with 3 chipselect */
+ return bus < 2 && cs < 3;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+ struct zynq_spi_slave *zslave = to_zynq_spi_slave(slave);
+ u32 cr;
+
+ debug("spi_cs_activate: 0x%08x\n", (u32)slave);
+
+ clrbits_le32(&zslave->base->cr, ZYNQ_SPI_CR_CS_MASK);
+ cr = readl(&zslave->base->cr);
+ /*
+ * CS cal logic: CS[13:10]
+ * xxx0 - cs0
+ * xx01 - cs1
+ * x011 - cs2
+ */
+ cr |= (~(0x1 << slave->cs) << 10) & ZYNQ_SPI_CR_CS_MASK;
+ writel(cr, &zslave->base->cr);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+ struct zynq_spi_slave *zslave = to_zynq_spi_slave(slave);
+
+ debug("spi_cs_deactivate: 0x%08x\n", (u32)slave);
+
+ setbits_le32(&zslave->base->cr, ZYNQ_SPI_CR_CS_MASK);
+}
+
+void spi_init()
+{
+ /* nothing to do */
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int mode)
+{
+ struct zynq_spi_slave *zslave;
+
+ if (!spi_cs_is_valid(bus, cs))
+ return NULL;
+
+ zslave = spi_alloc_slave(struct zynq_spi_slave, bus, cs);
+ if (!zslave) {
+ printf("SPI_error: Fail to allocate zynq_spi_slave\n");
+ return NULL;
+ }
+
+ zslave->base = get_zynq_spi_base(bus);
+ zslave->mode = mode;
+ zslave->fifo_depth = ZYNQ_SPI_FIFO_DEPTH;
+ zslave->input_hz = 166666700;
+ zslave->speed_hz = zslave->input_hz / 2;
+ zslave->req_hz = max_hz;
+
+ /* init the zynq spi hw */
+ zynq_spi_init_hw(zslave);
+
+ return &zslave->slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+ struct zynq_spi_slave *zslave = to_zynq_spi_slave(slave);
+
+ debug("spi_free_slave: 0x%08x\n", (u32)slave);
+ free(zslave);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+ struct zynq_spi_slave *zslave = to_zynq_spi_slave(slave);
+ u32 confr = 0;
+ u8 baud_rate_val = 0;
+
+ writel(~ZYNQ_SPI_ENR_SPI_EN_MASK, &zslave->base->enr);
+
+ /* Set the SPI Clock phase and polarities */
+ confr = readl(&zslave->base->cr);
+ confr &= ~(ZYNQ_SPI_CR_CPHA_MASK | ZYNQ_SPI_CR_CPOL_MASK);
+ if (zslave->mode & SPI_CPHA)
+ confr |= ZYNQ_SPI_CR_CPHA_MASK;
+ if (zslave->mode & SPI_CPOL)
+ confr |= ZYNQ_SPI_CR_CPOL_MASK;
+
+ /* Set the clock frequency */
+ if (zslave->req_hz == 0) {
+ /* Set baudrate x8, if the req_hz is 0 */
+ baud_rate_val = 0x2;
+ } else if (zslave->speed_hz != zslave->req_hz) {
+ while ((baud_rate_val < 8) &&
+ ((zslave->input_hz /
+ (2 << baud_rate_val)) > zslave->req_hz))
+ baud_rate_val++;
+ zslave->speed_hz = zslave->req_hz / (2 << baud_rate_val);
+ }
+ confr &= ~ZYNQ_SPI_CR_BRD_MASK;
+ confr |= (baud_rate_val << 3);
+ writel(confr, &zslave->base->cr);
+
+ writel(ZYNQ_SPI_ENR_SPI_EN_MASK, &zslave->base->enr);
+
+ return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+ struct zynq_spi_slave *zslave = to_zynq_spi_slave(slave);
+
+ debug("spi_release_bus: 0x%08x\n", (u32)slave);
+ writel(~ZYNQ_SPI_ENR_SPI_EN_MASK, &zslave->base->enr);
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+ void *din, unsigned long flags)
+{
+ struct zynq_spi_slave *zslave = to_zynq_spi_slave(slave);
+ u32 len = bitlen / 8;
+ u32 tx_len = len, rx_len = len, tx_tvl;
+ const u8 *tx_buf = dout;
+ u8 *rx_buf = din, buf;
+ u32 ts, status;
+
+ debug("spi_xfer: bus:%i cs:%i bitlen:%i len:%i flags:%lx\n",
+ slave->bus, slave->cs, bitlen, len, flags);
+
+ if (bitlen == 0)
+ return -1;
+
+ if (bitlen % 8) {
+ debug("spi_xfer: Non byte aligned SPI transfer\n");
+ return -1;
+ }
+
+ if (flags & SPI_XFER_BEGIN)
+ spi_cs_activate(slave);
+
+ while (rx_len > 0) {
+ /* Write the data into TX FIFO - tx threshold is fifo_depth */
+ tx_tvl = 0;
+ while ((tx_tvl < zslave->fifo_depth) && tx_len) {
+ if (tx_buf)
+ buf = *tx_buf++;
+ else
+ buf = 0;
+ writel(buf, &zslave->base->txdr);
+ tx_len--;
+ tx_tvl++;
+ }
+
+ /* Check TX FIFO completion */
+ ts = get_timer(0);
+ status = readl(&zslave->base->isr);
+ while (!(status & ZYNQ_SPI_IXR_TXOW_MASK)) {
+ if (get_timer(ts) > CONFIG_SYS_ZYNQ_SPI_WAIT) {
+ printf("spi_xfer: Timeout! TX FIFO not full\n");
+ return -1;
+ }
+ status = readl(&zslave->base->isr);
+ }
+
+ /* Read the data from RX FIFO */
+ status = readl(&zslave->base->isr);
+ while (status & ZYNQ_SPI_IXR_RXNEMPTY_MASK) {
+ buf = readl(&zslave->base->rxdr);
+ if (rx_buf)
+ *rx_buf++ = buf;
+ status = readl(&zslave->base->isr);
+ rx_len--;
+ }
+ }
+
+ if (flags & SPI_XFER_END)
+ spi_cs_deactivate(slave);
+
+ return 0;
+}
generated by cgit v1.1 at 2024-11-11 21:31:34 +0000