+++ /dev/null
-/*
- * Analog Devices SPI3 controller driver
- *
- * Copyright (c) 2011 Analog Devices Inc.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef _SPI_CHANNEL_H_
-#define _SPI_CHANNEL_H_
-
-#include <linux/types.h>
-
-/* SPI_CONTROL */
-#define SPI_CTL_EN 0x00000001 /* Enable */
-#define SPI_CTL_MSTR 0x00000002 /* Master/Slave */
-#define SPI_CTL_PSSE 0x00000004 /* controls modf error in master mode */
-#define SPI_CTL_ODM 0x00000008 /* Open Drain Mode */
-#define SPI_CTL_CPHA 0x00000010 /* Clock Phase */
-#define SPI_CTL_CPOL 0x00000020 /* Clock Polarity */
-#define SPI_CTL_ASSEL 0x00000040 /* Slave Select Pin Control */
-#define SPI_CTL_SELST 0x00000080 /* Slave Select Polarity in-between transfers */
-#define SPI_CTL_EMISO 0x00000100 /* Enable MISO */
-#define SPI_CTL_SIZE 0x00000600 /* Word Transfer Size */
-#define SPI_CTL_SIZE08 0x00000000 /* SIZE: 8 bits */
-#define SPI_CTL_SIZE16 0x00000200 /* SIZE: 16 bits */
-#define SPI_CTL_SIZE32 0x00000400 /* SIZE: 32 bits */
-#define SPI_CTL_LSBF 0x00001000 /* LSB First */
-#define SPI_CTL_FCEN 0x00002000 /* Flow-Control Enable */
-#define SPI_CTL_FCCH 0x00004000 /* Flow-Control Channel Selection */
-#define SPI_CTL_FCPL 0x00008000 /* Flow-Control Polarity */
-#define SPI_CTL_FCWM 0x00030000 /* Flow-Control Water-Mark */
-#define SPI_CTL_FIFO0 0x00000000 /* FCWM: TFIFO empty or RFIFO Full */
-#define SPI_CTL_FIFO1 0x00010000 /* FCWM: TFIFO 75% or more empty or RFIFO 75% or more full */
-#define SPI_CTL_FIFO2 0x00020000 /* FCWM: TFIFO 50% or more empty or RFIFO 50% or more full */
-#define SPI_CTL_FMODE 0x00040000 /* Fast-mode Enable */
-#define SPI_CTL_MIOM 0x00300000 /* Multiple I/O Mode */
-#define SPI_CTL_MIO_DIS 0x00000000 /* MIOM: Disable */
-#define SPI_CTL_MIO_DUAL 0x00100000 /* MIOM: Enable DIOM (Dual I/O Mode) */
-#define SPI_CTL_MIO_QUAD 0x00200000 /* MIOM: Enable QUAD (Quad SPI Mode) */
-#define SPI_CTL_SOSI 0x00400000 /* Start on MOSI */
-/* SPI_RX_CONTROL */
-#define SPI_RXCTL_REN 0x00000001 /* Receive Channel Enable */
-#define SPI_RXCTL_RTI 0x00000004 /* Receive Transfer Initiate */
-#define SPI_RXCTL_RWCEN 0x00000008 /* Receive Word Counter Enable */
-#define SPI_RXCTL_RDR 0x00000070 /* Receive Data Request */
-#define SPI_RXCTL_RDR_DIS 0x00000000 /* RDR: Disabled */
-#define SPI_RXCTL_RDR_NE 0x00000010 /* RDR: RFIFO not empty */
-#define SPI_RXCTL_RDR_25 0x00000020 /* RDR: RFIFO 25% full */
-#define SPI_RXCTL_RDR_50 0x00000030 /* RDR: RFIFO 50% full */
-#define SPI_RXCTL_RDR_75 0x00000040 /* RDR: RFIFO 75% full */
-#define SPI_RXCTL_RDR_FULL 0x00000050 /* RDR: RFIFO full */
-#define SPI_RXCTL_RDO 0x00000100 /* Receive Data Over-Run */
-#define SPI_RXCTL_RRWM 0x00003000 /* FIFO Regular Water-Mark */
-#define SPI_RXCTL_RWM_0 0x00000000 /* RRWM: RFIFO Empty */
-#define SPI_RXCTL_RWM_25 0x00001000 /* RRWM: RFIFO 25% full */
-#define SPI_RXCTL_RWM_50 0x00002000 /* RRWM: RFIFO 50% full */
-#define SPI_RXCTL_RWM_75 0x00003000 /* RRWM: RFIFO 75% full */
-#define SPI_RXCTL_RUWM 0x00070000 /* FIFO Urgent Water-Mark */
-#define SPI_RXCTL_UWM_DIS 0x00000000 /* RUWM: Disabled */
-#define SPI_RXCTL_UWM_25 0x00010000 /* RUWM: RFIFO 25% full */
-#define SPI_RXCTL_UWM_50 0x00020000 /* RUWM: RFIFO 50% full */
-#define SPI_RXCTL_UWM_75 0x00030000 /* RUWM: RFIFO 75% full */
-#define SPI_RXCTL_UWM_FULL 0x00040000 /* RUWM: RFIFO full */
-/* SPI_TX_CONTROL */
-#define SPI_TXCTL_TEN 0x00000001 /* Transmit Channel Enable */
-#define SPI_TXCTL_TTI 0x00000004 /* Transmit Transfer Initiate */
-#define SPI_TXCTL_TWCEN 0x00000008 /* Transmit Word Counter Enable */
-#define SPI_TXCTL_TDR 0x00000070 /* Transmit Data Request */
-#define SPI_TXCTL_TDR_DIS 0x00000000 /* TDR: Disabled */
-#define SPI_TXCTL_TDR_NF 0x00000010 /* TDR: TFIFO not full */
-#define SPI_TXCTL_TDR_25 0x00000020 /* TDR: TFIFO 25% empty */
-#define SPI_TXCTL_TDR_50 0x00000030 /* TDR: TFIFO 50% empty */
-#define SPI_TXCTL_TDR_75 0x00000040 /* TDR: TFIFO 75% empty */
-#define SPI_TXCTL_TDR_EMPTY 0x00000050 /* TDR: TFIFO empty */
-#define SPI_TXCTL_TDU 0x00000100 /* Transmit Data Under-Run */
-#define SPI_TXCTL_TRWM 0x00003000 /* FIFO Regular Water-Mark */
-#define SPI_TXCTL_RWM_FULL 0x00000000 /* TRWM: TFIFO full */
-#define SPI_TXCTL_RWM_25 0x00001000 /* TRWM: TFIFO 25% empty */
-#define SPI_TXCTL_RWM_50 0x00002000 /* TRWM: TFIFO 50% empty */
-#define SPI_TXCTL_RWM_75 0x00003000 /* TRWM: TFIFO 75% empty */
-#define SPI_TXCTL_TUWM 0x00070000 /* FIFO Urgent Water-Mark */
-#define SPI_TXCTL_UWM_DIS 0x00000000 /* TUWM: Disabled */
-#define SPI_TXCTL_UWM_25 0x00010000 /* TUWM: TFIFO 25% empty */
-#define SPI_TXCTL_UWM_50 0x00020000 /* TUWM: TFIFO 50% empty */
-#define SPI_TXCTL_UWM_75 0x00030000 /* TUWM: TFIFO 75% empty */
-#define SPI_TXCTL_UWM_EMPTY 0x00040000 /* TUWM: TFIFO empty */
-/* SPI_CLOCK */
-#define SPI_CLK_BAUD 0x0000FFFF /* Baud Rate */
-/* SPI_DELAY */
-#define SPI_DLY_STOP 0x000000FF /* Transfer delay time in multiples of SCK period */
-#define SPI_DLY_LEADX 0x00000100 /* Extended (1 SCK) LEAD Control */
-#define SPI_DLY_LAGX 0x00000200 /* Extended (1 SCK) LAG control */
-/* SPI_SSEL */
-#define SPI_SLVSEL_SSE1 0x00000002 /* SPISSEL1 Enable */
-#define SPI_SLVSEL_SSE2 0x00000004 /* SPISSEL2 Enable */
-#define SPI_SLVSEL_SSE3 0x00000008 /* SPISSEL3 Enable */
-#define SPI_SLVSEL_SSE4 0x00000010 /* SPISSEL4 Enable */
-#define SPI_SLVSEL_SSE5 0x00000020 /* SPISSEL5 Enable */
-#define SPI_SLVSEL_SSE6 0x00000040 /* SPISSEL6 Enable */
-#define SPI_SLVSEL_SSE7 0x00000080 /* SPISSEL7 Enable */
-#define SPI_SLVSEL_SSEL1 0x00000200 /* SPISSEL1 Value */
-#define SPI_SLVSEL_SSEL2 0x00000400 /* SPISSEL2 Value */
-#define SPI_SLVSEL_SSEL3 0x00000800 /* SPISSEL3 Value */
-#define SPI_SLVSEL_SSEL4 0x00001000 /* SPISSEL4 Value */
-#define SPI_SLVSEL_SSEL5 0x00002000 /* SPISSEL5 Value */
-#define SPI_SLVSEL_SSEL6 0x00004000 /* SPISSEL6 Value */
-#define SPI_SLVSEL_SSEL7 0x00008000 /* SPISSEL7 Value */
-/* SPI_RWC */
-#define SPI_RWC_VALUE 0x0000FFFF /* Received Word-Count */
-/* SPI_RWCR */
-#define SPI_RWCR_VALUE 0x0000FFFF /* Received Word-Count Reload */
-/* SPI_TWC */
-#define SPI_TWC_VALUE 0x0000FFFF /* Transmitted Word-Count */
-/* SPI_TWCR */
-#define SPI_TWCR_VALUE 0x0000FFFF /* Transmitted Word-Count Reload */
-/* SPI_IMASK */
-#define SPI_IMSK_RUWM 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
-#define SPI_IMSK_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
-#define SPI_IMSK_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
-#define SPI_IMSK_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
-#define SPI_IMSK_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
-#define SPI_IMSK_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
-#define SPI_IMSK_RSM 0x00000100 /* Receive Start Interrupt Mask */
-#define SPI_IMSK_TSM 0x00000200 /* Transmit Start Interrupt Mask */
-#define SPI_IMSK_RFM 0x00000400 /* Receive Finish Interrupt Mask */
-#define SPI_IMSK_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
-/* SPI_IMASKCL */
-#define SPI_IMSK_CLR_RUW 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
-#define SPI_IMSK_CLR_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
-#define SPI_IMSK_CLR_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
-#define SPI_IMSK_CLR_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
-#define SPI_IMSK_CLR_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
-#define SPI_IMSK_CLR_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
-#define SPI_IMSK_CLR_RSM 0x00000100 /* Receive Start Interrupt Mask */
-#define SPI_IMSK_CLR_TSM 0x00000200 /* Transmit Start Interrupt Mask */
-#define SPI_IMSK_CLR_RFM 0x00000400 /* Receive Finish Interrupt Mask */
-#define SPI_IMSK_CLR_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
-/* SPI_IMASKST */
-#define SPI_IMSK_SET_RUWM 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
-#define SPI_IMSK_SET_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
-#define SPI_IMSK_SET_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
-#define SPI_IMSK_SET_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
-#define SPI_IMSK_SET_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
-#define SPI_IMSK_SET_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
-#define SPI_IMSK_SET_RSM 0x00000100 /* Receive Start Interrupt Mask */
-#define SPI_IMSK_SET_TSM 0x00000200 /* Transmit Start Interrupt Mask */
-#define SPI_IMSK_SET_RFM 0x00000400 /* Receive Finish Interrupt Mask */
-#define SPI_IMSK_SET_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
-/* SPI_STATUS */
-#define SPI_STAT_SPIF 0x00000001 /* SPI Finished */
-#define SPI_STAT_RUWM 0x00000002 /* Receive Urgent Water-Mark Breached */
-#define SPI_STAT_TUWM 0x00000004 /* Transmit Urgent Water-Mark Breached */
-#define SPI_STAT_ROE 0x00000010 /* Receive Over-Run Error Indication */
-#define SPI_STAT_TUE 0x00000020 /* Transmit Under-Run Error Indication */
-#define SPI_STAT_TCE 0x00000040 /* Transmit Collision Error Indication */
-#define SPI_STAT_MODF 0x00000080 /* Mode Fault Error Indication */
-#define SPI_STAT_RS 0x00000100 /* Receive Start Indication */
-#define SPI_STAT_TS 0x00000200 /* Transmit Start Indication */
-#define SPI_STAT_RF 0x00000400 /* Receive Finish Indication */
-#define SPI_STAT_TF 0x00000800 /* Transmit Finish Indication */
-#define SPI_STAT_RFS 0x00007000 /* SPI_RFIFO status */
-#define SPI_STAT_RFIFO_EMPTY 0x00000000 /* RFS: RFIFO Empty */
-#define SPI_STAT_RFIFO_25 0x00001000 /* RFS: RFIFO 25% Full */
-#define SPI_STAT_RFIFO_50 0x00002000 /* RFS: RFIFO 50% Full */
-#define SPI_STAT_RFIFO_75 0x00003000 /* RFS: RFIFO 75% Full */
-#define SPI_STAT_RFIFO_FULL 0x00004000 /* RFS: RFIFO Full */
-#define SPI_STAT_TFS 0x00070000 /* SPI_TFIFO status */
-#define SPI_STAT_TFIFO_FULL 0x00000000 /* TFS: TFIFO full */
-#define SPI_STAT_TFIFO_25 0x00010000 /* TFS: TFIFO 25% empty */
-#define SPI_STAT_TFIFO_50 0x00020000 /* TFS: TFIFO 50% empty */
-#define SPI_STAT_TFIFO_75 0x00030000 /* TFS: TFIFO 75% empty */
-#define SPI_STAT_TFIFO_EMPTY 0x00040000 /* TFS: TFIFO empty */
-#define SPI_STAT_FCS 0x00100000 /* Flow-Control Stall Indication */
-#define SPI_STAT_RFE 0x00400000 /* SPI_RFIFO Empty */
-#define SPI_STAT_TFF 0x00800000 /* SPI_TFIFO Full */
-/* SPI_ILAT */
-#define SPI_ILAT_RUWMI 0x00000002 /* Receive Urgent Water Mark Interrupt */
-#define SPI_ILAT_TUWMI 0x00000004 /* Transmit Urgent Water Mark Interrupt */
-#define SPI_ILAT_ROI 0x00000010 /* Receive Over-Run Error Indication */
-#define SPI_ILAT_TUI 0x00000020 /* Transmit Under-Run Error Indication */
-#define SPI_ILAT_TCI 0x00000040 /* Transmit Collision Error Indication */
-#define SPI_ILAT_MFI 0x00000080 /* Mode Fault Error Indication */
-#define SPI_ILAT_RSI 0x00000100 /* Receive Start Indication */
-#define SPI_ILAT_TSI 0x00000200 /* Transmit Start Indication */
-#define SPI_ILAT_RFI 0x00000400 /* Receive Finish Indication */
-#define SPI_ILAT_TFI 0x00000800 /* Transmit Finish Indication */
-/* SPI_ILATCL */
-#define SPI_ILAT_CLR_RUWMI 0x00000002 /* Receive Urgent Water Mark Interrupt */
-#define SPI_ILAT_CLR_TUWMI 0x00000004 /* Transmit Urgent Water Mark Interrupt */
-#define SPI_ILAT_CLR_ROI 0x00000010 /* Receive Over-Run Error Indication */
-#define SPI_ILAT_CLR_TUI 0x00000020 /* Transmit Under-Run Error Indication */
-#define SPI_ILAT_CLR_TCI 0x00000040 /* Transmit Collision Error Indication */
-#define SPI_ILAT_CLR_MFI 0x00000080 /* Mode Fault Error Indication */
-#define SPI_ILAT_CLR_RSI 0x00000100 /* Receive Start Indication */
-#define SPI_ILAT_CLR_TSI 0x00000200 /* Transmit Start Indication */
-#define SPI_ILAT_CLR_RFI 0x00000400 /* Receive Finish Indication */
-#define SPI_ILAT_CLR_TFI 0x00000800 /* Transmit Finish Indication */
-
-/*
- * bfin spi3 registers layout
- */
-struct bfin_spi_regs {
- u32 revid;
- u32 control;
- u32 rx_control;
- u32 tx_control;
- u32 clock;
- u32 delay;
- u32 ssel;
- u32 rwc;
- u32 rwcr;
- u32 twc;
- u32 twcr;
- u32 reserved0;
- u32 emask;
- u32 emaskcl;
- u32 emaskst;
- u32 reserved1;
- u32 status;
- u32 elat;
- u32 elatcl;
- u32 reserved2;
- u32 rfifo;
- u32 reserved3;
- u32 tfifo;
-};
-
-#define MAX_CTRL_CS 8 /* cs in spi controller */
-
-/* device.platform_data for SSP controller devices */
-struct bfin_spi3_master {
- u16 num_chipselect;
- u16 pin_req[7];
-};
-
-/* spi_board_info.controller_data for SPI slave devices,
- * copied to spi_device.platform_data ... mostly for dma tuning
- */
-struct bfin_spi3_chip {
- u32 control;
- u16 cs_chg_udelay; /* Some devices require 16-bit delays */
- u32 tx_dummy_val; /* tx value for rx only transfer */
- bool enable_dma;
-};
-
-#endif /* _SPI_CHANNEL_H_ */
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/platform_data/pinctrl-adi2.h>
-#include <asm/bfin_spi3.h>
+#include <linux/spi/adi_spi3.h>
#include <asm/dma.h>
#include <asm/gpio.h>
#include <asm/nand.h>
.type = "w25q32",
};
-static struct bfin_spi3_chip spi_flash_chip_info = {
+static struct adi_spi3_chip spi_flash_chip_info = {
.enable_dma = true, /* use dma transfer with this chip*/
};
#endif
#if IS_ENABLED(CONFIG_SPI_SPIDEV)
-static struct bfin_spi3_chip spidev_chip_info = {
+static struct adi_spi3_chip spidev_chip_info = {
.enable_dma = true,
};
#endif
},
#endif
};
-#if IS_ENABLED(CONFIG_SPI_BFIN_V3)
+#if IS_ENABLED(CONFIG_SPI_ADI_V3)
/* SPI (0) */
static struct resource bfin_spi0_resource[] = {
{
};
/* SPI controller data */
-static struct bfin_spi3_master bf60x_spi_master_info0 = {
+static struct adi_spi3_master bf60x_spi_master_info0 = {
.num_chipselect = MAX_CTRL_CS + MAX_BLACKFIN_GPIOS,
.pin_req = {P_SPI0_SCK, P_SPI0_MISO, P_SPI0_MOSI, 0},
};
static struct platform_device bf60x_spi_master0 = {
- .name = "bfin-spi3",
+ .name = "adi-spi3",
.id = 0, /* Bus number */
.num_resources = ARRAY_SIZE(bfin_spi0_resource),
.resource = bfin_spi0_resource,
},
};
-static struct bfin_spi3_master bf60x_spi_master_info1 = {
+static struct adi_spi3_master bf60x_spi_master_info1 = {
.num_chipselect = MAX_CTRL_CS + MAX_BLACKFIN_GPIOS,
.pin_req = {P_SPI1_SCK, P_SPI1_MISO, P_SPI1_MOSI, 0},
};
static struct platform_device bf60x_spi_master1 = {
- .name = "bfin-spi3",
+ .name = "adi-spi3",
.id = 1, /* Bus number */
.num_resources = ARRAY_SIZE(bfin_spi1_resource),
.resource = bfin_spi1_resource,
&bfin_sdh_device,
#endif
-#if IS_ENABLED(CONFIG_SPI_BFIN_V3)
+#if IS_ENABLED(CONFIG_SPI_ADI_V3)
&bf60x_spi_master0,
&bf60x_spi_master1,
#endif
PIN_MAP_MUX_GROUP_DEFAULT("bfin_sir.1", "pinctrl-adi2.0", NULL, "uart1"),
PIN_MAP_MUX_GROUP_DEFAULT("bfin-sdh.0", "pinctrl-adi2.0", NULL, "rsi0"),
PIN_MAP_MUX_GROUP_DEFAULT("stmmaceth.0", "pinctrl-adi2.0", NULL, "eth0"),
- PIN_MAP_MUX_GROUP_DEFAULT("bfin-spi3.0", "pinctrl-adi2.0", NULL, "spi0"),
- PIN_MAP_MUX_GROUP_DEFAULT("bfin-spi3.1", "pinctrl-adi2.0", NULL, "spi1"),
+ PIN_MAP_MUX_GROUP_DEFAULT("adi-spi3.0", "pinctrl-adi2.0", NULL, "spi0"),
+ PIN_MAP_MUX_GROUP_DEFAULT("adi-spi3.1", "pinctrl-adi2.0", NULL, "spi1"),
PIN_MAP_MUX_GROUP_DEFAULT("i2c-bfin-twi.0", "pinctrl-adi2.0", NULL, "twi0"),
PIN_MAP_MUX_GROUP_DEFAULT("i2c-bfin-twi.1", "pinctrl-adi2.0", NULL, "twi1"),
PIN_MAP_MUX_GROUP_DEFAULT("bfin-rotary", "pinctrl-adi2.0", NULL, "rotary"),
help
This is the SPI controller master driver for Blackfin 5xx processor.
-config SPI_BFIN_V3
- tristate "SPI controller v3 for Blackfin"
+config SPI_ADI_V3
+ tristate "SPI controller v3 for ADI"
depends on BF60x
help
This is the SPI controller v3 master driver
obj-$(CONFIG_SPI_BCM63XX) += spi-bcm63xx.o
obj-$(CONFIG_SPI_BCM63XX_HSSPI) += spi-bcm63xx-hsspi.o
obj-$(CONFIG_SPI_BFIN5XX) += spi-bfin5xx.o
-obj-$(CONFIG_SPI_BFIN_V3) += spi-bfin-v3.o
+obj-$(CONFIG_SPI_ADI_V3) += spi-adi-v3.o
obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o
obj-$(CONFIG_SPI_BITBANG) += spi-bitbang.o
obj-$(CONFIG_SPI_BUTTERFLY) += spi-butterfly.o
--- /dev/null
+/*
+ * Analog Devices SPI3 controller driver
+ *
+ * Copyright (c) 2014 Analog Devices Inc.
+ *
+ * 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.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/adi_spi3.h>
+#include <linux/types.h>
+
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+enum adi_spi_state {
+ START_STATE,
+ RUNNING_STATE,
+ DONE_STATE,
+ ERROR_STATE
+};
+
+struct adi_spi_master;
+
+struct adi_spi_transfer_ops {
+ void (*write) (struct adi_spi_master *);
+ void (*read) (struct adi_spi_master *);
+ void (*duplex) (struct adi_spi_master *);
+};
+
+/* runtime info for spi master */
+struct adi_spi_master {
+ /* SPI framework hookup */
+ struct spi_master *master;
+
+ /* Regs base of SPI controller */
+ struct adi_spi_regs __iomem *regs;
+
+ /* Pin request list */
+ u16 *pin_req;
+
+ /* Message Transfer pump */
+ struct tasklet_struct pump_transfers;
+
+ /* Current message transfer state info */
+ struct spi_message *cur_msg;
+ struct spi_transfer *cur_transfer;
+ struct adi_spi_device *cur_chip;
+ unsigned transfer_len;
+
+ /* transfer buffer */
+ void *tx;
+ void *tx_end;
+ void *rx;
+ void *rx_end;
+
+ /* dma info */
+ unsigned int tx_dma;
+ unsigned int rx_dma;
+ dma_addr_t tx_dma_addr;
+ dma_addr_t rx_dma_addr;
+ unsigned long dummy_buffer; /* used in unidirectional transfer */
+ unsigned long tx_dma_size;
+ unsigned long rx_dma_size;
+ int tx_num;
+ int rx_num;
+
+ /* store register value for suspend/resume */
+ u32 control;
+ u32 ssel;
+
+ unsigned long sclk;
+ enum adi_spi_state state;
+
+ const struct adi_spi_transfer_ops *ops;
+};
+
+struct adi_spi_device {
+ u32 control;
+ u32 clock;
+ u32 ssel;
+
+ u8 cs;
+ u16 cs_chg_udelay; /* Some devices require > 255usec delay */
+ u32 cs_gpio;
+ u32 tx_dummy_val; /* tx value for rx only transfer */
+ bool enable_dma;
+ const struct adi_spi_transfer_ops *ops;
+};
+
+static void adi_spi_enable(struct adi_spi_master *drv_data)
+{
+ u32 ctl;
+
+ ctl = ioread32(&drv_data->regs->control);
+ ctl |= SPI_CTL_EN;
+ iowrite32(ctl, &drv_data->regs->control);
+}
+
+static void adi_spi_disable(struct adi_spi_master *drv_data)
+{
+ u32 ctl;
+
+ ctl = ioread32(&drv_data->regs->control);
+ ctl &= ~SPI_CTL_EN;
+ iowrite32(ctl, &drv_data->regs->control);
+}
+
+/* Caculate the SPI_CLOCK register value based on input HZ */
+static u32 hz_to_spi_clock(u32 sclk, u32 speed_hz)
+{
+ u32 spi_clock = sclk / speed_hz;
+
+ if (spi_clock)
+ spi_clock--;
+ return spi_clock;
+}
+
+static int adi_spi_flush(struct adi_spi_master *drv_data)
+{
+ unsigned long limit = loops_per_jiffy << 1;
+
+ /* wait for stop and clear stat */
+ while (!(ioread32(&drv_data->regs->status) & SPI_STAT_SPIF) && --limit)
+ cpu_relax();
+
+ iowrite32(0xFFFFFFFF, &drv_data->regs->status);
+
+ return limit;
+}
+
+/* Chip select operation functions for cs_change flag */
+static void adi_spi_cs_active(struct adi_spi_master *drv_data, struct adi_spi_device *chip)
+{
+ if (likely(chip->cs < MAX_CTRL_CS)) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg &= ~chip->ssel;
+ iowrite32(reg, &drv_data->regs->ssel);
+ } else {
+ gpio_set_value(chip->cs_gpio, 0);
+ }
+}
+
+static void adi_spi_cs_deactive(struct adi_spi_master *drv_data,
+ struct adi_spi_device *chip)
+{
+ if (likely(chip->cs < MAX_CTRL_CS)) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg |= chip->ssel;
+ iowrite32(reg, &drv_data->regs->ssel);
+ } else {
+ gpio_set_value(chip->cs_gpio, 1);
+ }
+
+ /* Move delay here for consistency */
+ if (chip->cs_chg_udelay)
+ udelay(chip->cs_chg_udelay);
+}
+
+/* enable or disable the pin muxed by GPIO and SPI CS to work as SPI CS */
+static inline void adi_spi_cs_enable(struct adi_spi_master *drv_data,
+ struct adi_spi_device *chip)
+{
+ if (chip->cs < MAX_CTRL_CS) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg |= chip->ssel >> 8;
+ iowrite32(reg, &drv_data->regs->ssel);
+ }
+}
+
+static inline void adi_spi_cs_disable(struct adi_spi_master *drv_data,
+ struct adi_spi_device *chip)
+{
+ if (chip->cs < MAX_CTRL_CS) {
+ u32 reg;
+ reg = ioread32(&drv_data->regs->ssel);
+ reg &= ~(chip->ssel >> 8);
+ iowrite32(reg, &drv_data->regs->ssel);
+ }
+}
+
+/* stop controller and re-config current chip*/
+static void adi_spi_restore_state(struct adi_spi_master *drv_data)
+{
+ struct adi_spi_device *chip = drv_data->cur_chip;
+
+ /* Clear status and disable clock */
+ iowrite32(0xFFFFFFFF, &drv_data->regs->status);
+ iowrite32(0x0, &drv_data->regs->rx_control);
+ iowrite32(0x0, &drv_data->regs->tx_control);
+ adi_spi_disable(drv_data);
+
+ /* Load the registers */
+ iowrite32(chip->control, &drv_data->regs->control);
+ iowrite32(chip->clock, &drv_data->regs->clock);
+
+ adi_spi_enable(drv_data);
+ drv_data->tx_num = drv_data->rx_num = 0;
+ /* we always choose tx transfer initiate */
+ iowrite32(SPI_RXCTL_REN, &drv_data->regs->rx_control);
+ iowrite32(SPI_TXCTL_TEN | SPI_TXCTL_TTI, &drv_data->regs->tx_control);
+ adi_spi_cs_active(drv_data, chip);
+}
+
+/* discard invalid rx data and empty rfifo */
+static inline void dummy_read(struct adi_spi_master *drv_data)
+{
+ while (!(ioread32(&drv_data->regs->status) & SPI_STAT_RFE))
+ ioread32(&drv_data->regs->rfifo);
+}
+
+static void adi_spi_u8_write(struct adi_spi_master *drv_data)
+{
+ dummy_read(drv_data);
+ while (drv_data->tx < drv_data->tx_end) {
+ iowrite32(*(u8 *)(drv_data->tx++), &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ ioread32(&drv_data->regs->rfifo);
+ }
+}
+
+static void adi_spi_u8_read(struct adi_spi_master *drv_data)
+{
+ u32 tx_val = drv_data->cur_chip->tx_dummy_val;
+
+ dummy_read(drv_data);
+ while (drv_data->rx < drv_data->rx_end) {
+ iowrite32(tx_val, &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ *(u8 *)(drv_data->rx++) = ioread32(&drv_data->regs->rfifo);
+ }
+}
+
+static void adi_spi_u8_duplex(struct adi_spi_master *drv_data)
+{
+ dummy_read(drv_data);
+ while (drv_data->rx < drv_data->rx_end) {
+ iowrite32(*(u8 *)(drv_data->tx++), &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ *(u8 *)(drv_data->rx++) = ioread32(&drv_data->regs->rfifo);
+ }
+}
+
+static const struct adi_spi_transfer_ops adi_spi_transfer_ops_u8 = {
+ .write = adi_spi_u8_write,
+ .read = adi_spi_u8_read,
+ .duplex = adi_spi_u8_duplex,
+};
+
+static void adi_spi_u16_write(struct adi_spi_master *drv_data)
+{
+ dummy_read(drv_data);
+ while (drv_data->tx < drv_data->tx_end) {
+ iowrite32(*(u16 *)drv_data->tx, &drv_data->regs->tfifo);
+ drv_data->tx += 2;
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ ioread32(&drv_data->regs->rfifo);
+ }
+}
+
+static void adi_spi_u16_read(struct adi_spi_master *drv_data)
+{
+ u32 tx_val = drv_data->cur_chip->tx_dummy_val;
+
+ dummy_read(drv_data);
+ while (drv_data->rx < drv_data->rx_end) {
+ iowrite32(tx_val, &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ *(u16 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
+ drv_data->rx += 2;
+ }
+}
+
+static void adi_spi_u16_duplex(struct adi_spi_master *drv_data)
+{
+ dummy_read(drv_data);
+ while (drv_data->rx < drv_data->rx_end) {
+ iowrite32(*(u16 *)drv_data->tx, &drv_data->regs->tfifo);
+ drv_data->tx += 2;
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ *(u16 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
+ drv_data->rx += 2;
+ }
+}
+
+static const struct adi_spi_transfer_ops adi_spi_transfer_ops_u16 = {
+ .write = adi_spi_u16_write,
+ .read = adi_spi_u16_read,
+ .duplex = adi_spi_u16_duplex,
+};
+
+static void adi_spi_u32_write(struct adi_spi_master *drv_data)
+{
+ dummy_read(drv_data);
+ while (drv_data->tx < drv_data->tx_end) {
+ iowrite32(*(u32 *)drv_data->tx, &drv_data->regs->tfifo);
+ drv_data->tx += 4;
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ ioread32(&drv_data->regs->rfifo);
+ }
+}
+
+static void adi_spi_u32_read(struct adi_spi_master *drv_data)
+{
+ u32 tx_val = drv_data->cur_chip->tx_dummy_val;
+
+ dummy_read(drv_data);
+ while (drv_data->rx < drv_data->rx_end) {
+ iowrite32(tx_val, &drv_data->regs->tfifo);
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ *(u32 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
+ drv_data->rx += 4;
+ }
+}
+
+static void adi_spi_u32_duplex(struct adi_spi_master *drv_data)
+{
+ dummy_read(drv_data);
+ while (drv_data->rx < drv_data->rx_end) {
+ iowrite32(*(u32 *)drv_data->tx, &drv_data->regs->tfifo);
+ drv_data->tx += 4;
+ while (ioread32(&drv_data->regs->status) & SPI_STAT_RFE)
+ cpu_relax();
+ *(u32 *)drv_data->rx = ioread32(&drv_data->regs->rfifo);
+ drv_data->rx += 4;
+ }
+}
+
+static const struct adi_spi_transfer_ops adi_spi_transfer_ops_u32 = {
+ .write = adi_spi_u32_write,
+ .read = adi_spi_u32_read,
+ .duplex = adi_spi_u32_duplex,
+};
+
+
+/* test if there is more transfer to be done */
+static void adi_spi_next_transfer(struct adi_spi_master *drv)
+{
+ struct spi_message *msg = drv->cur_msg;
+ struct spi_transfer *t = drv->cur_transfer;
+
+ /* Move to next transfer */
+ if (t->transfer_list.next != &msg->transfers) {
+ drv->cur_transfer = list_entry(t->transfer_list.next,
+ struct spi_transfer, transfer_list);
+ drv->state = RUNNING_STATE;
+ } else {
+ drv->state = DONE_STATE;
+ drv->cur_transfer = NULL;
+ }
+}
+
+static void adi_spi_giveback(struct adi_spi_master *drv_data)
+{
+ struct adi_spi_device *chip = drv_data->cur_chip;
+
+ adi_spi_cs_deactive(drv_data, chip);
+ spi_finalize_current_message(drv_data->master);
+}
+
+static int adi_spi_setup_transfer(struct adi_spi_master *drv)
+{
+ struct spi_transfer *t = drv->cur_transfer;
+ u32 cr, cr_width;
+
+ if (t->tx_buf) {
+ drv->tx = (void *)t->tx_buf;
+ drv->tx_end = drv->tx + t->len;
+ } else {
+ drv->tx = NULL;
+ }
+
+ if (t->rx_buf) {
+ drv->rx = t->rx_buf;
+ drv->rx_end = drv->rx + t->len;
+ } else {
+ drv->rx = NULL;
+ }
+
+ drv->transfer_len = t->len;
+
+ /* bits per word setup */
+ switch (t->bits_per_word) {
+ case 8:
+ cr_width = SPI_CTL_SIZE08;
+ drv->ops = &adi_spi_transfer_ops_u8;
+ break;
+ case 16:
+ cr_width = SPI_CTL_SIZE16;
+ drv->ops = &adi_spi_transfer_ops_u16;
+ break;
+ case 32:
+ cr_width = SPI_CTL_SIZE32;
+ drv->ops = &adi_spi_transfer_ops_u32;
+ break;
+ default:
+ return -EINVAL;
+ }
+ cr = ioread32(&drv->regs->control) & ~SPI_CTL_SIZE;
+ cr |= cr_width;
+ iowrite32(cr, &drv->regs->control);
+
+ /* speed setup */
+ iowrite32(hz_to_spi_clock(drv->sclk, t->speed_hz), &drv->regs->clock);
+ return 0;
+}
+
+static int adi_spi_dma_xfer(struct adi_spi_master *drv_data)
+{
+ struct spi_transfer *t = drv_data->cur_transfer;
+ struct spi_message *msg = drv_data->cur_msg;
+ struct adi_spi_device *chip = drv_data->cur_chip;
+ u32 dma_config;
+ unsigned long word_count, word_size;
+ void *tx_buf, *rx_buf;
+
+ switch (t->bits_per_word) {
+ case 8:
+ dma_config = WDSIZE_8 | PSIZE_8;
+ word_count = drv_data->transfer_len;
+ word_size = 1;
+ break;
+ case 16:
+ dma_config = WDSIZE_16 | PSIZE_16;
+ word_count = drv_data->transfer_len / 2;
+ word_size = 2;
+ break;
+ default:
+ dma_config = WDSIZE_32 | PSIZE_32;
+ word_count = drv_data->transfer_len / 4;
+ word_size = 4;
+ break;
+ }
+
+ if (!drv_data->rx) {
+ tx_buf = drv_data->tx;
+ rx_buf = &drv_data->dummy_buffer;
+ drv_data->tx_dma_size = drv_data->transfer_len;
+ drv_data->rx_dma_size = sizeof(drv_data->dummy_buffer);
+ set_dma_x_modify(drv_data->tx_dma, word_size);
+ set_dma_x_modify(drv_data->rx_dma, 0);
+ } else if (!drv_data->tx) {
+ drv_data->dummy_buffer = chip->tx_dummy_val;
+ tx_buf = &drv_data->dummy_buffer;
+ rx_buf = drv_data->rx;
+ drv_data->tx_dma_size = sizeof(drv_data->dummy_buffer);
+ drv_data->rx_dma_size = drv_data->transfer_len;
+ set_dma_x_modify(drv_data->tx_dma, 0);
+ set_dma_x_modify(drv_data->rx_dma, word_size);
+ } else {
+ tx_buf = drv_data->tx;
+ rx_buf = drv_data->rx;
+ drv_data->tx_dma_size = drv_data->rx_dma_size
+ = drv_data->transfer_len;
+ set_dma_x_modify(drv_data->tx_dma, word_size);
+ set_dma_x_modify(drv_data->rx_dma, word_size);
+ }
+
+ drv_data->tx_dma_addr = dma_map_single(&msg->spi->dev,
+ (void *)tx_buf,
+ drv_data->tx_dma_size,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(&msg->spi->dev,
+ drv_data->tx_dma_addr))
+ return -ENOMEM;
+
+ drv_data->rx_dma_addr = dma_map_single(&msg->spi->dev,
+ (void *)rx_buf,
+ drv_data->rx_dma_size,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(&msg->spi->dev,
+ drv_data->rx_dma_addr)) {
+ dma_unmap_single(&msg->spi->dev,
+ drv_data->tx_dma_addr,
+ drv_data->tx_dma_size,
+ DMA_TO_DEVICE);
+ return -ENOMEM;
+ }
+
+ dummy_read(drv_data);
+ set_dma_x_count(drv_data->tx_dma, word_count);
+ set_dma_x_count(drv_data->rx_dma, word_count);
+ set_dma_start_addr(drv_data->tx_dma, drv_data->tx_dma_addr);
+ set_dma_start_addr(drv_data->rx_dma, drv_data->rx_dma_addr);
+ dma_config |= DMAFLOW_STOP | RESTART | DI_EN;
+ set_dma_config(drv_data->tx_dma, dma_config);
+ set_dma_config(drv_data->rx_dma, dma_config | WNR);
+ enable_dma(drv_data->tx_dma);
+ enable_dma(drv_data->rx_dma);
+
+ iowrite32(SPI_RXCTL_REN | SPI_RXCTL_RDR_NE,
+ &drv_data->regs->rx_control);
+ iowrite32(SPI_TXCTL_TEN | SPI_TXCTL_TTI | SPI_TXCTL_TDR_NF,
+ &drv_data->regs->tx_control);
+
+ return 0;
+}
+
+static int adi_spi_pio_xfer(struct adi_spi_master *drv_data)
+{
+ struct spi_message *msg = drv_data->cur_msg;
+
+ if (!drv_data->rx) {
+ /* write only half duplex */
+ drv_data->ops->write(drv_data);
+ if (drv_data->tx != drv_data->tx_end)
+ return -EIO;
+ } else if (!drv_data->tx) {
+ /* read only half duplex */
+ drv_data->ops->read(drv_data);
+ if (drv_data->rx != drv_data->rx_end)
+ return -EIO;
+ } else {
+ /* full duplex mode */
+ drv_data->ops->duplex(drv_data);
+ if (drv_data->tx != drv_data->tx_end)
+ return -EIO;
+ }
+
+ if (!adi_spi_flush(drv_data))
+ return -EIO;
+ msg->actual_length += drv_data->transfer_len;
+ tasklet_schedule(&drv_data->pump_transfers);
+ return 0;
+}
+
+static void adi_spi_pump_transfers(unsigned long data)
+{
+ struct adi_spi_master *drv_data = (struct adi_spi_master *)data;
+ struct spi_message *msg = NULL;
+ struct spi_transfer *t = NULL;
+ struct adi_spi_device *chip = NULL;
+ int ret;
+
+ /* Get current state information */
+ msg = drv_data->cur_msg;
+ t = drv_data->cur_transfer;
+ chip = drv_data->cur_chip;
+
+ /* Handle for abort */
+ if (drv_data->state == ERROR_STATE) {
+ msg->status = -EIO;
+ adi_spi_giveback(drv_data);
+ return;
+ }
+
+ if (drv_data->state == RUNNING_STATE) {
+ if (t->delay_usecs)
+ udelay(t->delay_usecs);
+ if (t->cs_change)
+ adi_spi_cs_deactive(drv_data, chip);
+ adi_spi_next_transfer(drv_data);
+ t = drv_data->cur_transfer;
+ }
+ /* Handle end of message */
+ if (drv_data->state == DONE_STATE) {
+ msg->status = 0;
+ adi_spi_giveback(drv_data);
+ return;
+ }
+
+ if ((t->len == 0) || (t->tx_buf == NULL && t->rx_buf == NULL)) {
+ /* Schedule next transfer tasklet */
+ tasklet_schedule(&drv_data->pump_transfers);
+ return;
+ }
+
+ ret = adi_spi_setup_transfer(drv_data);
+ if (ret) {
+ msg->status = ret;
+ adi_spi_giveback(drv_data);
+ }
+
+ iowrite32(0xFFFFFFFF, &drv_data->regs->status);
+ adi_spi_cs_active(drv_data, chip);
+ drv_data->state = RUNNING_STATE;
+
+ if (chip->enable_dma)
+ ret = adi_spi_dma_xfer(drv_data);
+ else
+ ret = adi_spi_pio_xfer(drv_data);
+ if (ret) {
+ msg->status = ret;
+ adi_spi_giveback(drv_data);
+ }
+}
+
+static int adi_spi_transfer_one_message(struct spi_master *master,
+ struct spi_message *m)
+{
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
+
+ drv_data->cur_msg = m;
+ drv_data->cur_chip = spi_get_ctldata(drv_data->cur_msg->spi);
+ adi_spi_restore_state(drv_data);
+
+ drv_data->state = START_STATE;
+ drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next,
+ struct spi_transfer, transfer_list);
+
+ tasklet_schedule(&drv_data->pump_transfers);
+ return 0;
+}
+
+#define MAX_SPI_SSEL 7
+
+static const u16 ssel[][MAX_SPI_SSEL] = {
+ {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
+ P_SPI0_SSEL4, P_SPI0_SSEL5,
+ P_SPI0_SSEL6, P_SPI0_SSEL7},
+
+ {P_SPI1_SSEL1, P_SPI1_SSEL2, P_SPI1_SSEL3,
+ P_SPI1_SSEL4, P_SPI1_SSEL5,
+ P_SPI1_SSEL6, P_SPI1_SSEL7},
+
+ {P_SPI2_SSEL1, P_SPI2_SSEL2, P_SPI2_SSEL3,
+ P_SPI2_SSEL4, P_SPI2_SSEL5,
+ P_SPI2_SSEL6, P_SPI2_SSEL7},
+};
+
+static int adi_spi_setup(struct spi_device *spi)
+{
+ struct adi_spi_master *drv_data = spi_master_get_devdata(spi->master);
+ struct adi_spi_device *chip = spi_get_ctldata(spi);
+ u32 ctl_reg = SPI_CTL_ODM | SPI_CTL_PSSE;
+ int ret = -EINVAL;
+
+ if (!chip) {
+ struct adi_spi3_chip *chip_info = spi->controller_data;
+
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (!chip) {
+ dev_err(&spi->dev, "can not allocate chip data\n");
+ return -ENOMEM;
+ }
+ if (chip_info) {
+ if (chip_info->control & ~ctl_reg) {
+ dev_err(&spi->dev,
+ "do not set bits that the SPI framework manages\n");
+ goto error;
+ }
+ chip->control = chip_info->control;
+ chip->cs_chg_udelay = chip_info->cs_chg_udelay;
+ chip->tx_dummy_val = chip_info->tx_dummy_val;
+ chip->enable_dma = chip_info->enable_dma;
+ }
+ chip->cs = spi->chip_select;
+
+ if (chip->cs < MAX_CTRL_CS) {
+ chip->ssel = (1 << chip->cs) << 8;
+ ret = peripheral_request(ssel[spi->master->bus_num]
+ [chip->cs-1], dev_name(&spi->dev));
+ if (ret) {
+ dev_err(&spi->dev, "peripheral_request() error\n");
+ goto error;
+ }
+ } else {
+ chip->cs_gpio = chip->cs - MAX_CTRL_CS;
+ ret = gpio_request_one(chip->cs_gpio, GPIOF_OUT_INIT_HIGH,
+ dev_name(&spi->dev));
+ if (ret) {
+ dev_err(&spi->dev, "gpio_request_one() error\n");
+ goto error;
+ }
+ }
+ spi_set_ctldata(spi, chip);
+ }
+
+ /* force a default base state */
+ chip->control &= ctl_reg;
+
+ if (spi->mode & SPI_CPOL)
+ chip->control |= SPI_CTL_CPOL;
+ if (spi->mode & SPI_CPHA)
+ chip->control |= SPI_CTL_CPHA;
+ if (spi->mode & SPI_LSB_FIRST)
+ chip->control |= SPI_CTL_LSBF;
+ chip->control |= SPI_CTL_MSTR;
+ /* we choose software to controll cs */
+ chip->control &= ~SPI_CTL_ASSEL;
+
+ chip->clock = hz_to_spi_clock(drv_data->sclk, spi->max_speed_hz);
+
+ adi_spi_cs_enable(drv_data, chip);
+ adi_spi_cs_deactive(drv_data, chip);
+
+ return 0;
+error:
+ if (chip) {
+ kfree(chip);
+ spi_set_ctldata(spi, NULL);
+ }
+
+ return ret;
+}
+
+static void adi_spi_cleanup(struct spi_device *spi)
+{
+ struct adi_spi_device *chip = spi_get_ctldata(spi);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(spi->master);
+
+ if (!chip)
+ return;
+
+ if (chip->cs < MAX_CTRL_CS) {
+ peripheral_free(ssel[spi->master->bus_num]
+ [chip->cs-1]);
+ adi_spi_cs_disable(drv_data, chip);
+ } else {
+ gpio_free(chip->cs_gpio);
+ }
+
+ kfree(chip);
+ spi_set_ctldata(spi, NULL);
+}
+
+static irqreturn_t adi_spi_tx_dma_isr(int irq, void *dev_id)
+{
+ struct adi_spi_master *drv_data = dev_id;
+ u32 dma_stat = get_dma_curr_irqstat(drv_data->tx_dma);
+ u32 tx_ctl;
+
+ clear_dma_irqstat(drv_data->tx_dma);
+ if (dma_stat & DMA_DONE) {
+ drv_data->tx_num++;
+ } else {
+ dev_err(&drv_data->master->dev,
+ "spi tx dma error: %d\n", dma_stat);
+ if (drv_data->tx)
+ drv_data->state = ERROR_STATE;
+ }
+ tx_ctl = ioread32(&drv_data->regs->tx_control);
+ tx_ctl &= ~SPI_TXCTL_TDR_NF;
+ iowrite32(tx_ctl, &drv_data->regs->tx_control);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t adi_spi_rx_dma_isr(int irq, void *dev_id)
+{
+ struct adi_spi_master *drv_data = dev_id;
+ struct spi_message *msg = drv_data->cur_msg;
+ u32 dma_stat = get_dma_curr_irqstat(drv_data->rx_dma);
+
+ clear_dma_irqstat(drv_data->rx_dma);
+ if (dma_stat & DMA_DONE) {
+ drv_data->rx_num++;
+ /* we may fail on tx dma */
+ if (drv_data->state != ERROR_STATE)
+ msg->actual_length += drv_data->transfer_len;
+ } else {
+ drv_data->state = ERROR_STATE;
+ dev_err(&drv_data->master->dev,
+ "spi rx dma error: %d\n", dma_stat);
+ }
+ iowrite32(0, &drv_data->regs->tx_control);
+ iowrite32(0, &drv_data->regs->rx_control);
+ if (drv_data->rx_num != drv_data->tx_num)
+ dev_dbg(&drv_data->master->dev,
+ "dma interrupt missing: tx=%d,rx=%d\n",
+ drv_data->tx_num, drv_data->rx_num);
+ tasklet_schedule(&drv_data->pump_transfers);
+ return IRQ_HANDLED;
+}
+
+static int adi_spi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct adi_spi3_master *info = dev_get_platdata(dev);
+ struct spi_master *master;
+ struct adi_spi_master *drv_data;
+ struct resource *mem, *res;
+ unsigned int tx_dma, rx_dma;
+ unsigned long sclk;
+ int ret;
+
+ if (!info) {
+ dev_err(dev, "platform data missing!\n");
+ return -ENODEV;
+ }
+
+ sclk = get_sclk1();
+ if (!sclk) {
+ dev_err(dev, "can not get sclk1\n");
+ return -ENXIO;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!res) {
+ dev_err(dev, "can not get tx dma resource\n");
+ return -ENXIO;
+ }
+ tx_dma = res->start;
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (!res) {
+ dev_err(dev, "can not get rx dma resource\n");
+ return -ENXIO;
+ }
+ rx_dma = res->start;
+
+ /* allocate master with space for drv_data */
+ master = spi_alloc_master(dev, sizeof(*drv_data));
+ if (!master) {
+ dev_err(dev, "can not alloc spi_master\n");
+ return -ENOMEM;
+ }
+ platform_set_drvdata(pdev, master);
+
+ /* the mode bits supported by this driver */
+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
+
+ master->bus_num = pdev->id;
+ master->num_chipselect = info->num_chipselect;
+ master->cleanup = adi_spi_cleanup;
+ master->setup = adi_spi_setup;
+ master->transfer_one_message = adi_spi_transfer_one_message;
+ master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) |
+ SPI_BPW_MASK(8);
+
+ drv_data = spi_master_get_devdata(master);
+ drv_data->master = master;
+ drv_data->tx_dma = tx_dma;
+ drv_data->rx_dma = rx_dma;
+ drv_data->pin_req = info->pin_req;
+ drv_data->sclk = sclk;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ drv_data->regs = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(drv_data->regs)) {
+ ret = PTR_ERR(drv_data->regs);
+ goto err_put_master;
+ }
+
+ /* request tx and rx dma */
+ ret = request_dma(tx_dma, "SPI_TX_DMA");
+ if (ret) {
+ dev_err(dev, "can not request SPI TX DMA channel\n");
+ goto err_put_master;
+ }
+ set_dma_callback(tx_dma, adi_spi_tx_dma_isr, drv_data);
+
+ ret = request_dma(rx_dma, "SPI_RX_DMA");
+ if (ret) {
+ dev_err(dev, "can not request SPI RX DMA channel\n");
+ goto err_free_tx_dma;
+ }
+ set_dma_callback(drv_data->rx_dma, adi_spi_rx_dma_isr, drv_data);
+
+ /* request CLK, MOSI and MISO */
+ ret = peripheral_request_list(drv_data->pin_req, "adi-spi3");
+ if (ret < 0) {
+ dev_err(dev, "can not request spi pins\n");
+ goto err_free_rx_dma;
+ }
+
+ iowrite32(SPI_CTL_MSTR | SPI_CTL_CPHA, &drv_data->regs->control);
+ iowrite32(0x0000FE00, &drv_data->regs->ssel);
+ iowrite32(0x0, &drv_data->regs->delay);
+
+ tasklet_init(&drv_data->pump_transfers,
+ adi_spi_pump_transfers, (unsigned long)drv_data);
+ /* register with the SPI framework */
+ ret = devm_spi_register_master(dev, master);
+ if (ret) {
+ dev_err(dev, "can not register spi master\n");
+ goto err_free_peripheral;
+ }
+
+ return ret;
+
+err_free_peripheral:
+ peripheral_free_list(drv_data->pin_req);
+err_free_rx_dma:
+ free_dma(rx_dma);
+err_free_tx_dma:
+ free_dma(tx_dma);
+err_put_master:
+ spi_master_put(master);
+
+ return ret;
+}
+
+static int adi_spi_remove(struct platform_device *pdev)
+{
+ struct spi_master *master = platform_get_drvdata(pdev);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
+
+ adi_spi_disable(drv_data);
+ peripheral_free_list(drv_data->pin_req);
+ free_dma(drv_data->rx_dma);
+ free_dma(drv_data->tx_dma);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int adi_spi_suspend(struct device *dev)
+{
+ struct spi_master *master = dev_get_drvdata(dev);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
+
+ spi_master_suspend(master);
+
+ drv_data->control = ioread32(&drv_data->regs->control);
+ drv_data->ssel = ioread32(&drv_data->regs->ssel);
+
+ iowrite32(SPI_CTL_MSTR | SPI_CTL_CPHA, &drv_data->regs->control);
+ iowrite32(0x0000FE00, &drv_data->regs->ssel);
+ dma_disable_irq(drv_data->rx_dma);
+ dma_disable_irq(drv_data->tx_dma);
+
+ return 0;
+}
+
+static int adi_spi_resume(struct device *dev)
+{
+ struct spi_master *master = dev_get_drvdata(dev);
+ struct adi_spi_master *drv_data = spi_master_get_devdata(master);
+ int ret = 0;
+
+ /* bootrom may modify spi and dma status when resume in spi boot mode */
+ disable_dma(drv_data->rx_dma);
+
+ dma_enable_irq(drv_data->rx_dma);
+ dma_enable_irq(drv_data->tx_dma);
+ iowrite32(drv_data->control, &drv_data->regs->control);
+ iowrite32(drv_data->ssel, &drv_data->regs->ssel);
+
+ ret = spi_master_resume(master);
+ if (ret) {
+ free_dma(drv_data->rx_dma);
+ free_dma(drv_data->tx_dma);
+ }
+
+ return ret;
+}
+#endif
+static const struct dev_pm_ops adi_spi_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(adi_spi_suspend, adi_spi_resume)
+};
+
+MODULE_ALIAS("platform:adi-spi3");
+static struct platform_driver adi_spi_driver = {
+ .driver = {
+ .name = "adi-spi3",
+ .owner = THIS_MODULE,
+ .pm = &adi_spi_pm_ops,
+ },
+ .remove = adi_spi_remove,
+};
+
+module_platform_driver_probe(adi_spi_driver, adi_spi_probe);
+
+MODULE_DESCRIPTION("Analog Devices SPI3 controller driver");
+MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
+MODULE_LICENSE("GPL v2");
+++ /dev/null
-/*
- * Analog Devices SPI3 controller driver
- *
- * Copyright (c) 2013 Analog Devices Inc.
- *
- * 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.
- */
-
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/errno.h>
-#include <linux/gpio.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/spi/spi.h>
-#include <linux/types.h>
-
-#include <asm/bfin_spi3.h>
-#include <asm/cacheflush.h>
-#include <asm/dma.h>
-#include <asm/portmux.h>
-
-enum bfin_spi_state {
- START_STATE,
- RUNNING_STATE,
- DONE_STATE,
- ERROR_STATE
-};
-
-struct bfin_spi_master;
-
-struct bfin_spi_transfer_ops {
- void (*write) (struct bfin_spi_master *);
- void (*read) (struct bfin_spi_master *);
- void (*duplex) (struct bfin_spi_master *);
-};
-
-/* runtime info for spi master */
-struct bfin_spi_master {
- /* SPI framework hookup */
- struct spi_master *master;
-
- /* Regs base of SPI controller */
- struct bfin_spi_regs __iomem *regs;
-
- /* Pin request list */
- u16 *pin_req;
-
- /* Message Transfer pump */
- struct tasklet_struct pump_transfers;
-
- /* Current message transfer state info */
- struct spi_message *cur_msg;
- struct spi_transfer *cur_transfer;
- struct bfin_spi_device *cur_chip;
- unsigned transfer_len;
-
- /* transfer buffer */
- void *tx;
- void *tx_end;
- void *rx;
- void *rx_end;
-
- /* dma info */
- unsigned int tx_dma;
- unsigned int rx_dma;
- dma_addr_t tx_dma_addr;
- dma_addr_t rx_dma_addr;
- unsigned long dummy_buffer; /* used in unidirectional transfer */
- unsigned long tx_dma_size;
- unsigned long rx_dma_size;
- int tx_num;
- int rx_num;
-
- /* store register value for suspend/resume */
- u32 control;
- u32 ssel;
-
- unsigned long sclk;
- enum bfin_spi_state state;
-
- const struct bfin_spi_transfer_ops *ops;
-};
-
-struct bfin_spi_device {
- u32 control;
- u32 clock;
- u32 ssel;
-
- u8 cs;
- u16 cs_chg_udelay; /* Some devices require > 255usec delay */
- u32 cs_gpio;
- u32 tx_dummy_val; /* tx value for rx only transfer */
- bool enable_dma;
- const struct bfin_spi_transfer_ops *ops;
-};
-
-static void bfin_spi_enable(struct bfin_spi_master *drv_data)
-{
- bfin_write_or(&drv_data->regs->control, SPI_CTL_EN);
-}
-
-static void bfin_spi_disable(struct bfin_spi_master *drv_data)
-{
- bfin_write_and(&drv_data->regs->control, ~SPI_CTL_EN);
-}
-
-/* Caculate the SPI_CLOCK register value based on input HZ */
-static u32 hz_to_spi_clock(u32 sclk, u32 speed_hz)
-{
- u32 spi_clock = sclk / speed_hz;
-
- if (spi_clock)
- spi_clock--;
- return spi_clock;
-}
-
-static int bfin_spi_flush(struct bfin_spi_master *drv_data)
-{
- unsigned long limit = loops_per_jiffy << 1;
-
- /* wait for stop and clear stat */
- while (!(bfin_read(&drv_data->regs->status) & SPI_STAT_SPIF) && --limit)
- cpu_relax();
-
- bfin_write(&drv_data->regs->status, 0xFFFFFFFF);
-
- return limit;
-}
-
-/* Chip select operation functions for cs_change flag */
-static void bfin_spi_cs_active(struct bfin_spi_master *drv_data, struct bfin_spi_device *chip)
-{
- if (likely(chip->cs < MAX_CTRL_CS))
- bfin_write_and(&drv_data->regs->ssel, ~chip->ssel);
- else
- gpio_set_value(chip->cs_gpio, 0);
-}
-
-static void bfin_spi_cs_deactive(struct bfin_spi_master *drv_data,
- struct bfin_spi_device *chip)
-{
- if (likely(chip->cs < MAX_CTRL_CS))
- bfin_write_or(&drv_data->regs->ssel, chip->ssel);
- else
- gpio_set_value(chip->cs_gpio, 1);
-
- /* Move delay here for consistency */
- if (chip->cs_chg_udelay)
- udelay(chip->cs_chg_udelay);
-}
-
-/* enable or disable the pin muxed by GPIO and SPI CS to work as SPI CS */
-static inline void bfin_spi_cs_enable(struct bfin_spi_master *drv_data,
- struct bfin_spi_device *chip)
-{
- if (chip->cs < MAX_CTRL_CS)
- bfin_write_or(&drv_data->regs->ssel, chip->ssel >> 8);
-}
-
-static inline void bfin_spi_cs_disable(struct bfin_spi_master *drv_data,
- struct bfin_spi_device *chip)
-{
- if (chip->cs < MAX_CTRL_CS)
- bfin_write_and(&drv_data->regs->ssel, ~(chip->ssel >> 8));
-}
-
-/* stop controller and re-config current chip*/
-static void bfin_spi_restore_state(struct bfin_spi_master *drv_data)
-{
- struct bfin_spi_device *chip = drv_data->cur_chip;
-
- /* Clear status and disable clock */
- bfin_write(&drv_data->regs->status, 0xFFFFFFFF);
- bfin_write(&drv_data->regs->rx_control, 0x0);
- bfin_write(&drv_data->regs->tx_control, 0x0);
- bfin_spi_disable(drv_data);
-
- SSYNC();
-
- /* Load the registers */
- bfin_write(&drv_data->regs->control, chip->control);
- bfin_write(&drv_data->regs->clock, chip->clock);
-
- bfin_spi_enable(drv_data);
- drv_data->tx_num = drv_data->rx_num = 0;
- /* we always choose tx transfer initiate */
- bfin_write(&drv_data->regs->rx_control, SPI_RXCTL_REN);
- bfin_write(&drv_data->regs->tx_control,
- SPI_TXCTL_TEN | SPI_TXCTL_TTI);
- bfin_spi_cs_active(drv_data, chip);
-}
-
-/* discard invalid rx data and empty rfifo */
-static inline void dummy_read(struct bfin_spi_master *drv_data)
-{
- while (!(bfin_read(&drv_data->regs->status) & SPI_STAT_RFE))
- bfin_read(&drv_data->regs->rfifo);
-}
-
-static void bfin_spi_u8_write(struct bfin_spi_master *drv_data)
-{
- dummy_read(drv_data);
- while (drv_data->tx < drv_data->tx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u8 *)(drv_data->tx++)));
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- bfin_read(&drv_data->regs->rfifo);
- }
-}
-
-static void bfin_spi_u8_read(struct bfin_spi_master *drv_data)
-{
- u32 tx_val = drv_data->cur_chip->tx_dummy_val;
-
- dummy_read(drv_data);
- while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, tx_val);
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- *(u8 *)(drv_data->rx++) = bfin_read(&drv_data->regs->rfifo);
- }
-}
-
-static void bfin_spi_u8_duplex(struct bfin_spi_master *drv_data)
-{
- dummy_read(drv_data);
- while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u8 *)(drv_data->tx++)));
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- *(u8 *)(drv_data->rx++) = bfin_read(&drv_data->regs->rfifo);
- }
-}
-
-static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u8 = {
- .write = bfin_spi_u8_write,
- .read = bfin_spi_u8_read,
- .duplex = bfin_spi_u8_duplex,
-};
-
-static void bfin_spi_u16_write(struct bfin_spi_master *drv_data)
-{
- dummy_read(drv_data);
- while (drv_data->tx < drv_data->tx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u16 *)drv_data->tx));
- drv_data->tx += 2;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- bfin_read(&drv_data->regs->rfifo);
- }
-}
-
-static void bfin_spi_u16_read(struct bfin_spi_master *drv_data)
-{
- u32 tx_val = drv_data->cur_chip->tx_dummy_val;
-
- dummy_read(drv_data);
- while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, tx_val);
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- *(u16 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
- drv_data->rx += 2;
- }
-}
-
-static void bfin_spi_u16_duplex(struct bfin_spi_master *drv_data)
-{
- dummy_read(drv_data);
- while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u16 *)drv_data->tx));
- drv_data->tx += 2;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- *(u16 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
- drv_data->rx += 2;
- }
-}
-
-static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u16 = {
- .write = bfin_spi_u16_write,
- .read = bfin_spi_u16_read,
- .duplex = bfin_spi_u16_duplex,
-};
-
-static void bfin_spi_u32_write(struct bfin_spi_master *drv_data)
-{
- dummy_read(drv_data);
- while (drv_data->tx < drv_data->tx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u32 *)drv_data->tx));
- drv_data->tx += 4;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- bfin_read(&drv_data->regs->rfifo);
- }
-}
-
-static void bfin_spi_u32_read(struct bfin_spi_master *drv_data)
-{
- u32 tx_val = drv_data->cur_chip->tx_dummy_val;
-
- dummy_read(drv_data);
- while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, tx_val);
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- *(u32 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
- drv_data->rx += 4;
- }
-}
-
-static void bfin_spi_u32_duplex(struct bfin_spi_master *drv_data)
-{
- dummy_read(drv_data);
- while (drv_data->rx < drv_data->rx_end) {
- bfin_write(&drv_data->regs->tfifo, (*(u32 *)drv_data->tx));
- drv_data->tx += 4;
- while (bfin_read(&drv_data->regs->status) & SPI_STAT_RFE)
- cpu_relax();
- *(u32 *)drv_data->rx = bfin_read(&drv_data->regs->rfifo);
- drv_data->rx += 4;
- }
-}
-
-static const struct bfin_spi_transfer_ops bfin_bfin_spi_transfer_ops_u32 = {
- .write = bfin_spi_u32_write,
- .read = bfin_spi_u32_read,
- .duplex = bfin_spi_u32_duplex,
-};
-
-
-/* test if there is more transfer to be done */
-static void bfin_spi_next_transfer(struct bfin_spi_master *drv)
-{
- struct spi_message *msg = drv->cur_msg;
- struct spi_transfer *t = drv->cur_transfer;
-
- /* Move to next transfer */
- if (t->transfer_list.next != &msg->transfers) {
- drv->cur_transfer = list_entry(t->transfer_list.next,
- struct spi_transfer, transfer_list);
- drv->state = RUNNING_STATE;
- } else {
- drv->state = DONE_STATE;
- drv->cur_transfer = NULL;
- }
-}
-
-static void bfin_spi_giveback(struct bfin_spi_master *drv_data)
-{
- struct bfin_spi_device *chip = drv_data->cur_chip;
-
- bfin_spi_cs_deactive(drv_data, chip);
- spi_finalize_current_message(drv_data->master);
-}
-
-static int bfin_spi_setup_transfer(struct bfin_spi_master *drv)
-{
- struct spi_transfer *t = drv->cur_transfer;
- u32 cr, cr_width;
-
- if (t->tx_buf) {
- drv->tx = (void *)t->tx_buf;
- drv->tx_end = drv->tx + t->len;
- } else {
- drv->tx = NULL;
- }
-
- if (t->rx_buf) {
- drv->rx = t->rx_buf;
- drv->rx_end = drv->rx + t->len;
- } else {
- drv->rx = NULL;
- }
-
- drv->transfer_len = t->len;
-
- /* bits per word setup */
- switch (t->bits_per_word) {
- case 8:
- cr_width = SPI_CTL_SIZE08;
- drv->ops = &bfin_bfin_spi_transfer_ops_u8;
- break;
- case 16:
- cr_width = SPI_CTL_SIZE16;
- drv->ops = &bfin_bfin_spi_transfer_ops_u16;
- break;
- case 32:
- cr_width = SPI_CTL_SIZE32;
- drv->ops = &bfin_bfin_spi_transfer_ops_u32;
- break;
- default:
- return -EINVAL;
- }
- cr = bfin_read(&drv->regs->control) & ~SPI_CTL_SIZE;
- cr |= cr_width;
- bfin_write(&drv->regs->control, cr);
-
- /* speed setup */
- bfin_write(&drv->regs->clock,
- hz_to_spi_clock(drv->sclk, t->speed_hz));
- return 0;
-}
-
-static int bfin_spi_dma_xfer(struct bfin_spi_master *drv_data)
-{
- struct spi_transfer *t = drv_data->cur_transfer;
- struct spi_message *msg = drv_data->cur_msg;
- struct bfin_spi_device *chip = drv_data->cur_chip;
- u32 dma_config;
- unsigned long word_count, word_size;
- void *tx_buf, *rx_buf;
-
- switch (t->bits_per_word) {
- case 8:
- dma_config = WDSIZE_8 | PSIZE_8;
- word_count = drv_data->transfer_len;
- word_size = 1;
- break;
- case 16:
- dma_config = WDSIZE_16 | PSIZE_16;
- word_count = drv_data->transfer_len / 2;
- word_size = 2;
- break;
- default:
- dma_config = WDSIZE_32 | PSIZE_32;
- word_count = drv_data->transfer_len / 4;
- word_size = 4;
- break;
- }
-
- if (!drv_data->rx) {
- tx_buf = drv_data->tx;
- rx_buf = &drv_data->dummy_buffer;
- drv_data->tx_dma_size = drv_data->transfer_len;
- drv_data->rx_dma_size = sizeof(drv_data->dummy_buffer);
- set_dma_x_modify(drv_data->tx_dma, word_size);
- set_dma_x_modify(drv_data->rx_dma, 0);
- } else if (!drv_data->tx) {
- drv_data->dummy_buffer = chip->tx_dummy_val;
- tx_buf = &drv_data->dummy_buffer;
- rx_buf = drv_data->rx;
- drv_data->tx_dma_size = sizeof(drv_data->dummy_buffer);
- drv_data->rx_dma_size = drv_data->transfer_len;
- set_dma_x_modify(drv_data->tx_dma, 0);
- set_dma_x_modify(drv_data->rx_dma, word_size);
- } else {
- tx_buf = drv_data->tx;
- rx_buf = drv_data->rx;
- drv_data->tx_dma_size = drv_data->rx_dma_size
- = drv_data->transfer_len;
- set_dma_x_modify(drv_data->tx_dma, word_size);
- set_dma_x_modify(drv_data->rx_dma, word_size);
- }
-
- drv_data->tx_dma_addr = dma_map_single(&msg->spi->dev,
- (void *)tx_buf,
- drv_data->tx_dma_size,
- DMA_TO_DEVICE);
- if (dma_mapping_error(&msg->spi->dev,
- drv_data->tx_dma_addr))
- return -ENOMEM;
-
- drv_data->rx_dma_addr = dma_map_single(&msg->spi->dev,
- (void *)rx_buf,
- drv_data->rx_dma_size,
- DMA_FROM_DEVICE);
- if (dma_mapping_error(&msg->spi->dev,
- drv_data->rx_dma_addr)) {
- dma_unmap_single(&msg->spi->dev,
- drv_data->tx_dma_addr,
- drv_data->tx_dma_size,
- DMA_TO_DEVICE);
- return -ENOMEM;
- }
-
- dummy_read(drv_data);
- set_dma_x_count(drv_data->tx_dma, word_count);
- set_dma_x_count(drv_data->rx_dma, word_count);
- set_dma_start_addr(drv_data->tx_dma, drv_data->tx_dma_addr);
- set_dma_start_addr(drv_data->rx_dma, drv_data->rx_dma_addr);
- dma_config |= DMAFLOW_STOP | RESTART | DI_EN;
- set_dma_config(drv_data->tx_dma, dma_config);
- set_dma_config(drv_data->rx_dma, dma_config | WNR);
- enable_dma(drv_data->tx_dma);
- enable_dma(drv_data->rx_dma);
- SSYNC();
-
- bfin_write(&drv_data->regs->rx_control, SPI_RXCTL_REN | SPI_RXCTL_RDR_NE);
- SSYNC();
- bfin_write(&drv_data->regs->tx_control,
- SPI_TXCTL_TEN | SPI_TXCTL_TTI | SPI_TXCTL_TDR_NF);
-
- return 0;
-}
-
-static int bfin_spi_pio_xfer(struct bfin_spi_master *drv_data)
-{
- struct spi_message *msg = drv_data->cur_msg;
-
- if (!drv_data->rx) {
- /* write only half duplex */
- drv_data->ops->write(drv_data);
- if (drv_data->tx != drv_data->tx_end)
- return -EIO;
- } else if (!drv_data->tx) {
- /* read only half duplex */
- drv_data->ops->read(drv_data);
- if (drv_data->rx != drv_data->rx_end)
- return -EIO;
- } else {
- /* full duplex mode */
- drv_data->ops->duplex(drv_data);
- if (drv_data->tx != drv_data->tx_end)
- return -EIO;
- }
-
- if (!bfin_spi_flush(drv_data))
- return -EIO;
- msg->actual_length += drv_data->transfer_len;
- tasklet_schedule(&drv_data->pump_transfers);
- return 0;
-}
-
-static void bfin_spi_pump_transfers(unsigned long data)
-{
- struct bfin_spi_master *drv_data = (struct bfin_spi_master *)data;
- struct spi_message *msg = NULL;
- struct spi_transfer *t = NULL;
- struct bfin_spi_device *chip = NULL;
- int ret;
-
- /* Get current state information */
- msg = drv_data->cur_msg;
- t = drv_data->cur_transfer;
- chip = drv_data->cur_chip;
-
- /* Handle for abort */
- if (drv_data->state == ERROR_STATE) {
- msg->status = -EIO;
- bfin_spi_giveback(drv_data);
- return;
- }
-
- if (drv_data->state == RUNNING_STATE) {
- if (t->delay_usecs)
- udelay(t->delay_usecs);
- if (t->cs_change)
- bfin_spi_cs_deactive(drv_data, chip);
- bfin_spi_next_transfer(drv_data);
- t = drv_data->cur_transfer;
- }
- /* Handle end of message */
- if (drv_data->state == DONE_STATE) {
- msg->status = 0;
- bfin_spi_giveback(drv_data);
- return;
- }
-
- if ((t->len == 0) || (t->tx_buf == NULL && t->rx_buf == NULL)) {
- /* Schedule next transfer tasklet */
- tasklet_schedule(&drv_data->pump_transfers);
- return;
- }
-
- ret = bfin_spi_setup_transfer(drv_data);
- if (ret) {
- msg->status = ret;
- bfin_spi_giveback(drv_data);
- }
-
- bfin_write(&drv_data->regs->status, 0xFFFFFFFF);
- bfin_spi_cs_active(drv_data, chip);
- drv_data->state = RUNNING_STATE;
-
- if (chip->enable_dma)
- ret = bfin_spi_dma_xfer(drv_data);
- else
- ret = bfin_spi_pio_xfer(drv_data);
- if (ret) {
- msg->status = ret;
- bfin_spi_giveback(drv_data);
- }
-}
-
-static int bfin_spi_transfer_one_message(struct spi_master *master,
- struct spi_message *m)
-{
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
-
- drv_data->cur_msg = m;
- drv_data->cur_chip = spi_get_ctldata(drv_data->cur_msg->spi);
- bfin_spi_restore_state(drv_data);
-
- drv_data->state = START_STATE;
- drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next,
- struct spi_transfer, transfer_list);
-
- tasklet_schedule(&drv_data->pump_transfers);
- return 0;
-}
-
-#define MAX_SPI_SSEL 7
-
-static const u16 ssel[][MAX_SPI_SSEL] = {
- {P_SPI0_SSEL1, P_SPI0_SSEL2, P_SPI0_SSEL3,
- P_SPI0_SSEL4, P_SPI0_SSEL5,
- P_SPI0_SSEL6, P_SPI0_SSEL7},
-
- {P_SPI1_SSEL1, P_SPI1_SSEL2, P_SPI1_SSEL3,
- P_SPI1_SSEL4, P_SPI1_SSEL5,
- P_SPI1_SSEL6, P_SPI1_SSEL7},
-
- {P_SPI2_SSEL1, P_SPI2_SSEL2, P_SPI2_SSEL3,
- P_SPI2_SSEL4, P_SPI2_SSEL5,
- P_SPI2_SSEL6, P_SPI2_SSEL7},
-};
-
-static int bfin_spi_setup(struct spi_device *spi)
-{
- struct bfin_spi_master *drv_data = spi_master_get_devdata(spi->master);
- struct bfin_spi_device *chip = spi_get_ctldata(spi);
- u32 bfin_ctl_reg = SPI_CTL_ODM | SPI_CTL_PSSE;
- int ret = -EINVAL;
-
- if (!chip) {
- struct bfin_spi3_chip *chip_info = spi->controller_data;
-
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
- if (!chip) {
- dev_err(&spi->dev, "can not allocate chip data\n");
- return -ENOMEM;
- }
- if (chip_info) {
- if (chip_info->control & ~bfin_ctl_reg) {
- dev_err(&spi->dev,
- "do not set bits that the SPI framework manages\n");
- goto error;
- }
- chip->control = chip_info->control;
- chip->cs_chg_udelay = chip_info->cs_chg_udelay;
- chip->tx_dummy_val = chip_info->tx_dummy_val;
- chip->enable_dma = chip_info->enable_dma;
- }
- chip->cs = spi->chip_select;
- if (chip->cs < MAX_CTRL_CS) {
- chip->ssel = (1 << chip->cs) << 8;
- ret = peripheral_request(ssel[spi->master->bus_num]
- [chip->cs-1], dev_name(&spi->dev));
- if (ret) {
- dev_err(&spi->dev, "peripheral_request() error\n");
- goto error;
- }
- } else {
- chip->cs_gpio = chip->cs - MAX_CTRL_CS;
- ret = gpio_request_one(chip->cs_gpio, GPIOF_OUT_INIT_HIGH,
- dev_name(&spi->dev));
- if (ret) {
- dev_err(&spi->dev, "gpio_request_one() error\n");
- goto error;
- }
- }
- spi_set_ctldata(spi, chip);
- }
-
- /* force a default base state */
- chip->control &= bfin_ctl_reg;
-
- if (spi->mode & SPI_CPOL)
- chip->control |= SPI_CTL_CPOL;
- if (spi->mode & SPI_CPHA)
- chip->control |= SPI_CTL_CPHA;
- if (spi->mode & SPI_LSB_FIRST)
- chip->control |= SPI_CTL_LSBF;
- chip->control |= SPI_CTL_MSTR;
- /* we choose software to controll cs */
- chip->control &= ~SPI_CTL_ASSEL;
-
- chip->clock = hz_to_spi_clock(drv_data->sclk, spi->max_speed_hz);
-
- bfin_spi_cs_enable(drv_data, chip);
- bfin_spi_cs_deactive(drv_data, chip);
-
- return 0;
-error:
- if (chip) {
- kfree(chip);
- spi_set_ctldata(spi, NULL);
- }
-
- return ret;
-}
-
-static void bfin_spi_cleanup(struct spi_device *spi)
-{
- struct bfin_spi_device *chip = spi_get_ctldata(spi);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(spi->master);
-
- if (!chip)
- return;
-
- if (chip->cs < MAX_CTRL_CS) {
- peripheral_free(ssel[spi->master->bus_num]
- [chip->cs-1]);
- bfin_spi_cs_disable(drv_data, chip);
- } else {
- gpio_free(chip->cs_gpio);
- }
-
- kfree(chip);
- spi_set_ctldata(spi, NULL);
-}
-
-static irqreturn_t bfin_spi_tx_dma_isr(int irq, void *dev_id)
-{
- struct bfin_spi_master *drv_data = dev_id;
- u32 dma_stat = get_dma_curr_irqstat(drv_data->tx_dma);
-
- clear_dma_irqstat(drv_data->tx_dma);
- if (dma_stat & DMA_DONE) {
- drv_data->tx_num++;
- } else {
- dev_err(&drv_data->master->dev,
- "spi tx dma error: %d\n", dma_stat);
- if (drv_data->tx)
- drv_data->state = ERROR_STATE;
- }
- bfin_write_and(&drv_data->regs->tx_control, ~SPI_TXCTL_TDR_NF);
- return IRQ_HANDLED;
-}
-
-static irqreturn_t bfin_spi_rx_dma_isr(int irq, void *dev_id)
-{
- struct bfin_spi_master *drv_data = dev_id;
- struct spi_message *msg = drv_data->cur_msg;
- u32 dma_stat = get_dma_curr_irqstat(drv_data->rx_dma);
-
- clear_dma_irqstat(drv_data->rx_dma);
- if (dma_stat & DMA_DONE) {
- drv_data->rx_num++;
- /* we may fail on tx dma */
- if (drv_data->state != ERROR_STATE)
- msg->actual_length += drv_data->transfer_len;
- } else {
- drv_data->state = ERROR_STATE;
- dev_err(&drv_data->master->dev,
- "spi rx dma error: %d\n", dma_stat);
- }
- bfin_write(&drv_data->regs->tx_control, 0);
- bfin_write(&drv_data->regs->rx_control, 0);
- if (drv_data->rx_num != drv_data->tx_num)
- dev_dbg(&drv_data->master->dev,
- "dma interrupt missing: tx=%d,rx=%d\n",
- drv_data->tx_num, drv_data->rx_num);
- tasklet_schedule(&drv_data->pump_transfers);
- return IRQ_HANDLED;
-}
-
-static int bfin_spi_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct bfin_spi3_master *info = dev_get_platdata(dev);
- struct spi_master *master;
- struct bfin_spi_master *drv_data;
- struct resource *mem, *res;
- unsigned int tx_dma, rx_dma;
- unsigned long sclk;
- int ret;
-
- if (!info) {
- dev_err(dev, "platform data missing!\n");
- return -ENODEV;
- }
-
- sclk = get_sclk1();
- if (!sclk) {
- dev_err(dev, "can not get sclk1\n");
- return -ENXIO;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!res) {
- dev_err(dev, "can not get tx dma resource\n");
- return -ENXIO;
- }
- tx_dma = res->start;
-
- res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (!res) {
- dev_err(dev, "can not get rx dma resource\n");
- return -ENXIO;
- }
- rx_dma = res->start;
-
- /* allocate master with space for drv_data */
- master = spi_alloc_master(dev, sizeof(*drv_data));
- if (!master) {
- dev_err(dev, "can not alloc spi_master\n");
- return -ENOMEM;
- }
- platform_set_drvdata(pdev, master);
-
- /* the mode bits supported by this driver */
- master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
-
- master->bus_num = pdev->id;
- master->num_chipselect = info->num_chipselect;
- master->cleanup = bfin_spi_cleanup;
- master->setup = bfin_spi_setup;
- master->transfer_one_message = bfin_spi_transfer_one_message;
- master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) |
- SPI_BPW_MASK(8);
-
- drv_data = spi_master_get_devdata(master);
- drv_data->master = master;
- drv_data->tx_dma = tx_dma;
- drv_data->rx_dma = rx_dma;
- drv_data->pin_req = info->pin_req;
- drv_data->sclk = sclk;
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- drv_data->regs = devm_ioremap_resource(dev, mem);
- if (IS_ERR(drv_data->regs)) {
- ret = PTR_ERR(drv_data->regs);
- goto err_put_master;
- }
-
- /* request tx and rx dma */
- ret = request_dma(tx_dma, "SPI_TX_DMA");
- if (ret) {
- dev_err(dev, "can not request SPI TX DMA channel\n");
- goto err_put_master;
- }
- set_dma_callback(tx_dma, bfin_spi_tx_dma_isr, drv_data);
-
- ret = request_dma(rx_dma, "SPI_RX_DMA");
- if (ret) {
- dev_err(dev, "can not request SPI RX DMA channel\n");
- goto err_free_tx_dma;
- }
- set_dma_callback(drv_data->rx_dma, bfin_spi_rx_dma_isr, drv_data);
-
- /* request CLK, MOSI and MISO */
- ret = peripheral_request_list(drv_data->pin_req, "bfin-spi3");
- if (ret < 0) {
- dev_err(dev, "can not request spi pins\n");
- goto err_free_rx_dma;
- }
-
- bfin_write(&drv_data->regs->control, SPI_CTL_MSTR | SPI_CTL_CPHA);
- bfin_write(&drv_data->regs->ssel, 0x0000FE00);
- bfin_write(&drv_data->regs->delay, 0x0);
-
- tasklet_init(&drv_data->pump_transfers,
- bfin_spi_pump_transfers, (unsigned long)drv_data);
- /* register with the SPI framework */
- ret = devm_spi_register_master(dev, master);
- if (ret) {
- dev_err(dev, "can not register spi master\n");
- goto err_free_peripheral;
- }
-
- return ret;
-
-err_free_peripheral:
- peripheral_free_list(drv_data->pin_req);
-err_free_rx_dma:
- free_dma(rx_dma);
-err_free_tx_dma:
- free_dma(tx_dma);
-err_put_master:
- spi_master_put(master);
-
- return ret;
-}
-
-static int bfin_spi_remove(struct platform_device *pdev)
-{
- struct spi_master *master = platform_get_drvdata(pdev);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
-
- bfin_spi_disable(drv_data);
-
- peripheral_free_list(drv_data->pin_req);
- free_dma(drv_data->rx_dma);
- free_dma(drv_data->tx_dma);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int bfin_spi_suspend(struct device *dev)
-{
- struct spi_master *master = dev_get_drvdata(dev);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
-
- spi_master_suspend(master);
-
- drv_data->control = bfin_read(&drv_data->regs->control);
- drv_data->ssel = bfin_read(&drv_data->regs->ssel);
-
- bfin_write(&drv_data->regs->control, SPI_CTL_MSTR | SPI_CTL_CPHA);
- bfin_write(&drv_data->regs->ssel, 0x0000FE00);
- dma_disable_irq(drv_data->rx_dma);
- dma_disable_irq(drv_data->tx_dma);
-
- return 0;
-}
-
-static int bfin_spi_resume(struct device *dev)
-{
- struct spi_master *master = dev_get_drvdata(dev);
- struct bfin_spi_master *drv_data = spi_master_get_devdata(master);
- int ret = 0;
-
- /* bootrom may modify spi and dma status when resume in spi boot mode */
- disable_dma(drv_data->rx_dma);
-
- dma_enable_irq(drv_data->rx_dma);
- dma_enable_irq(drv_data->tx_dma);
- bfin_write(&drv_data->regs->control, drv_data->control);
- bfin_write(&drv_data->regs->ssel, drv_data->ssel);
-
- ret = spi_master_resume(master);
- if (ret) {
- free_dma(drv_data->rx_dma);
- free_dma(drv_data->tx_dma);
- }
-
- return ret;
-}
-#endif
-static const struct dev_pm_ops bfin_spi_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(bfin_spi_suspend, bfin_spi_resume)
-};
-
-MODULE_ALIAS("platform:bfin-spi3");
-static struct platform_driver bfin_spi_driver = {
- .driver = {
- .name = "bfin-spi3",
- .owner = THIS_MODULE,
- .pm = &bfin_spi_pm_ops,
- },
- .remove = bfin_spi_remove,
-};
-
-module_platform_driver_probe(bfin_spi_driver, bfin_spi_probe);
-
-MODULE_DESCRIPTION("Analog Devices SPI3 controller driver");
-MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
-MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * Analog Devices SPI3 controller driver
+ *
+ * Copyright (c) 2014 Analog Devices Inc.
+ *
+ * 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.
+ */
+
+#ifndef _ADI_SPI3_H_
+#define _ADI_SPI3_H_
+
+#include <linux/types.h>
+
+/* SPI_CONTROL */
+#define SPI_CTL_EN 0x00000001 /* Enable */
+#define SPI_CTL_MSTR 0x00000002 /* Master/Slave */
+#define SPI_CTL_PSSE 0x00000004 /* controls modf error in master mode */
+#define SPI_CTL_ODM 0x00000008 /* Open Drain Mode */
+#define SPI_CTL_CPHA 0x00000010 /* Clock Phase */
+#define SPI_CTL_CPOL 0x00000020 /* Clock Polarity */
+#define SPI_CTL_ASSEL 0x00000040 /* Slave Select Pin Control */
+#define SPI_CTL_SELST 0x00000080 /* Slave Select Polarity in-between transfers */
+#define SPI_CTL_EMISO 0x00000100 /* Enable MISO */
+#define SPI_CTL_SIZE 0x00000600 /* Word Transfer Size */
+#define SPI_CTL_SIZE08 0x00000000 /* SIZE: 8 bits */
+#define SPI_CTL_SIZE16 0x00000200 /* SIZE: 16 bits */
+#define SPI_CTL_SIZE32 0x00000400 /* SIZE: 32 bits */
+#define SPI_CTL_LSBF 0x00001000 /* LSB First */
+#define SPI_CTL_FCEN 0x00002000 /* Flow-Control Enable */
+#define SPI_CTL_FCCH 0x00004000 /* Flow-Control Channel Selection */
+#define SPI_CTL_FCPL 0x00008000 /* Flow-Control Polarity */
+#define SPI_CTL_FCWM 0x00030000 /* Flow-Control Water-Mark */
+#define SPI_CTL_FIFO0 0x00000000 /* FCWM: TFIFO empty or RFIFO Full */
+#define SPI_CTL_FIFO1 0x00010000 /* FCWM: TFIFO 75% or more empty or RFIFO 75% or more full */
+#define SPI_CTL_FIFO2 0x00020000 /* FCWM: TFIFO 50% or more empty or RFIFO 50% or more full */
+#define SPI_CTL_FMODE 0x00040000 /* Fast-mode Enable */
+#define SPI_CTL_MIOM 0x00300000 /* Multiple I/O Mode */
+#define SPI_CTL_MIO_DIS 0x00000000 /* MIOM: Disable */
+#define SPI_CTL_MIO_DUAL 0x00100000 /* MIOM: Enable DIOM (Dual I/O Mode) */
+#define SPI_CTL_MIO_QUAD 0x00200000 /* MIOM: Enable QUAD (Quad SPI Mode) */
+#define SPI_CTL_SOSI 0x00400000 /* Start on MOSI */
+/* SPI_RX_CONTROL */
+#define SPI_RXCTL_REN 0x00000001 /* Receive Channel Enable */
+#define SPI_RXCTL_RTI 0x00000004 /* Receive Transfer Initiate */
+#define SPI_RXCTL_RWCEN 0x00000008 /* Receive Word Counter Enable */
+#define SPI_RXCTL_RDR 0x00000070 /* Receive Data Request */
+#define SPI_RXCTL_RDR_DIS 0x00000000 /* RDR: Disabled */
+#define SPI_RXCTL_RDR_NE 0x00000010 /* RDR: RFIFO not empty */
+#define SPI_RXCTL_RDR_25 0x00000020 /* RDR: RFIFO 25% full */
+#define SPI_RXCTL_RDR_50 0x00000030 /* RDR: RFIFO 50% full */
+#define SPI_RXCTL_RDR_75 0x00000040 /* RDR: RFIFO 75% full */
+#define SPI_RXCTL_RDR_FULL 0x00000050 /* RDR: RFIFO full */
+#define SPI_RXCTL_RDO 0x00000100 /* Receive Data Over-Run */
+#define SPI_RXCTL_RRWM 0x00003000 /* FIFO Regular Water-Mark */
+#define SPI_RXCTL_RWM_0 0x00000000 /* RRWM: RFIFO Empty */
+#define SPI_RXCTL_RWM_25 0x00001000 /* RRWM: RFIFO 25% full */
+#define SPI_RXCTL_RWM_50 0x00002000 /* RRWM: RFIFO 50% full */
+#define SPI_RXCTL_RWM_75 0x00003000 /* RRWM: RFIFO 75% full */
+#define SPI_RXCTL_RUWM 0x00070000 /* FIFO Urgent Water-Mark */
+#define SPI_RXCTL_UWM_DIS 0x00000000 /* RUWM: Disabled */
+#define SPI_RXCTL_UWM_25 0x00010000 /* RUWM: RFIFO 25% full */
+#define SPI_RXCTL_UWM_50 0x00020000 /* RUWM: RFIFO 50% full */
+#define SPI_RXCTL_UWM_75 0x00030000 /* RUWM: RFIFO 75% full */
+#define SPI_RXCTL_UWM_FULL 0x00040000 /* RUWM: RFIFO full */
+/* SPI_TX_CONTROL */
+#define SPI_TXCTL_TEN 0x00000001 /* Transmit Channel Enable */
+#define SPI_TXCTL_TTI 0x00000004 /* Transmit Transfer Initiate */
+#define SPI_TXCTL_TWCEN 0x00000008 /* Transmit Word Counter Enable */
+#define SPI_TXCTL_TDR 0x00000070 /* Transmit Data Request */
+#define SPI_TXCTL_TDR_DIS 0x00000000 /* TDR: Disabled */
+#define SPI_TXCTL_TDR_NF 0x00000010 /* TDR: TFIFO not full */
+#define SPI_TXCTL_TDR_25 0x00000020 /* TDR: TFIFO 25% empty */
+#define SPI_TXCTL_TDR_50 0x00000030 /* TDR: TFIFO 50% empty */
+#define SPI_TXCTL_TDR_75 0x00000040 /* TDR: TFIFO 75% empty */
+#define SPI_TXCTL_TDR_EMPTY 0x00000050 /* TDR: TFIFO empty */
+#define SPI_TXCTL_TDU 0x00000100 /* Transmit Data Under-Run */
+#define SPI_TXCTL_TRWM 0x00003000 /* FIFO Regular Water-Mark */
+#define SPI_TXCTL_RWM_FULL 0x00000000 /* TRWM: TFIFO full */
+#define SPI_TXCTL_RWM_25 0x00001000 /* TRWM: TFIFO 25% empty */
+#define SPI_TXCTL_RWM_50 0x00002000 /* TRWM: TFIFO 50% empty */
+#define SPI_TXCTL_RWM_75 0x00003000 /* TRWM: TFIFO 75% empty */
+#define SPI_TXCTL_TUWM 0x00070000 /* FIFO Urgent Water-Mark */
+#define SPI_TXCTL_UWM_DIS 0x00000000 /* TUWM: Disabled */
+#define SPI_TXCTL_UWM_25 0x00010000 /* TUWM: TFIFO 25% empty */
+#define SPI_TXCTL_UWM_50 0x00020000 /* TUWM: TFIFO 50% empty */
+#define SPI_TXCTL_UWM_75 0x00030000 /* TUWM: TFIFO 75% empty */
+#define SPI_TXCTL_UWM_EMPTY 0x00040000 /* TUWM: TFIFO empty */
+/* SPI_CLOCK */
+#define SPI_CLK_BAUD 0x0000FFFF /* Baud Rate */
+/* SPI_DELAY */
+#define SPI_DLY_STOP 0x000000FF /* Transfer delay time in multiples of SCK period */
+#define SPI_DLY_LEADX 0x00000100 /* Extended (1 SCK) LEAD Control */
+#define SPI_DLY_LAGX 0x00000200 /* Extended (1 SCK) LAG control */
+/* SPI_SSEL */
+#define SPI_SLVSEL_SSE1 0x00000002 /* SPISSEL1 Enable */
+#define SPI_SLVSEL_SSE2 0x00000004 /* SPISSEL2 Enable */
+#define SPI_SLVSEL_SSE3 0x00000008 /* SPISSEL3 Enable */
+#define SPI_SLVSEL_SSE4 0x00000010 /* SPISSEL4 Enable */
+#define SPI_SLVSEL_SSE5 0x00000020 /* SPISSEL5 Enable */
+#define SPI_SLVSEL_SSE6 0x00000040 /* SPISSEL6 Enable */
+#define SPI_SLVSEL_SSE7 0x00000080 /* SPISSEL7 Enable */
+#define SPI_SLVSEL_SSEL1 0x00000200 /* SPISSEL1 Value */
+#define SPI_SLVSEL_SSEL2 0x00000400 /* SPISSEL2 Value */
+#define SPI_SLVSEL_SSEL3 0x00000800 /* SPISSEL3 Value */
+#define SPI_SLVSEL_SSEL4 0x00001000 /* SPISSEL4 Value */
+#define SPI_SLVSEL_SSEL5 0x00002000 /* SPISSEL5 Value */
+#define SPI_SLVSEL_SSEL6 0x00004000 /* SPISSEL6 Value */
+#define SPI_SLVSEL_SSEL7 0x00008000 /* SPISSEL7 Value */
+/* SPI_RWC */
+#define SPI_RWC_VALUE 0x0000FFFF /* Received Word-Count */
+/* SPI_RWCR */
+#define SPI_RWCR_VALUE 0x0000FFFF /* Received Word-Count Reload */
+/* SPI_TWC */
+#define SPI_TWC_VALUE 0x0000FFFF /* Transmitted Word-Count */
+/* SPI_TWCR */
+#define SPI_TWCR_VALUE 0x0000FFFF /* Transmitted Word-Count Reload */
+/* SPI_IMASK */
+#define SPI_IMSK_RUWM 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
+#define SPI_IMSK_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
+#define SPI_IMSK_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
+#define SPI_IMSK_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
+#define SPI_IMSK_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
+#define SPI_IMSK_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
+#define SPI_IMSK_RSM 0x00000100 /* Receive Start Interrupt Mask */
+#define SPI_IMSK_TSM 0x00000200 /* Transmit Start Interrupt Mask */
+#define SPI_IMSK_RFM 0x00000400 /* Receive Finish Interrupt Mask */
+#define SPI_IMSK_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
+/* SPI_IMASKCL */
+#define SPI_IMSK_CLR_RUW 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
+#define SPI_IMSK_CLR_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
+#define SPI_IMSK_CLR_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
+#define SPI_IMSK_CLR_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
+#define SPI_IMSK_CLR_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
+#define SPI_IMSK_CLR_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
+#define SPI_IMSK_CLR_RSM 0x00000100 /* Receive Start Interrupt Mask */
+#define SPI_IMSK_CLR_TSM 0x00000200 /* Transmit Start Interrupt Mask */
+#define SPI_IMSK_CLR_RFM 0x00000400 /* Receive Finish Interrupt Mask */
+#define SPI_IMSK_CLR_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
+/* SPI_IMASKST */
+#define SPI_IMSK_SET_RUWM 0x00000002 /* Receive Urgent Water-Mark Interrupt Mask */
+#define SPI_IMSK_SET_TUWM 0x00000004 /* Transmit Urgent Water-Mark Interrupt Mask */
+#define SPI_IMSK_SET_ROM 0x00000010 /* Receive Over-Run Error Interrupt Mask */
+#define SPI_IMSK_SET_TUM 0x00000020 /* Transmit Under-Run Error Interrupt Mask */
+#define SPI_IMSK_SET_TCM 0x00000040 /* Transmit Collision Error Interrupt Mask */
+#define SPI_IMSK_SET_MFM 0x00000080 /* Mode Fault Error Interrupt Mask */
+#define SPI_IMSK_SET_RSM 0x00000100 /* Receive Start Interrupt Mask */
+#define SPI_IMSK_SET_TSM 0x00000200 /* Transmit Start Interrupt Mask */
+#define SPI_IMSK_SET_RFM 0x00000400 /* Receive Finish Interrupt Mask */
+#define SPI_IMSK_SET_TFM 0x00000800 /* Transmit Finish Interrupt Mask */
+/* SPI_STATUS */
+#define SPI_STAT_SPIF 0x00000001 /* SPI Finished */
+#define SPI_STAT_RUWM 0x00000002 /* Receive Urgent Water-Mark Breached */
+#define SPI_STAT_TUWM 0x00000004 /* Transmit Urgent Water-Mark Breached */
+#define SPI_STAT_ROE 0x00000010 /* Receive Over-Run Error Indication */
+#define SPI_STAT_TUE 0x00000020 /* Transmit Under-Run Error Indication */
+#define SPI_STAT_TCE 0x00000040 /* Transmit Collision Error Indication */
+#define SPI_STAT_MODF 0x00000080 /* Mode Fault Error Indication */
+#define SPI_STAT_RS 0x00000100 /* Receive Start Indication */
+#define SPI_STAT_TS 0x00000200 /* Transmit Start Indication */
+#define SPI_STAT_RF 0x00000400 /* Receive Finish Indication */
+#define SPI_STAT_TF 0x00000800 /* Transmit Finish Indication */
+#define SPI_STAT_RFS 0x00007000 /* SPI_RFIFO status */
+#define SPI_STAT_RFIFO_EMPTY 0x00000000 /* RFS: RFIFO Empty */
+#define SPI_STAT_RFIFO_25 0x00001000 /* RFS: RFIFO 25% Full */
+#define SPI_STAT_RFIFO_50 0x00002000 /* RFS: RFIFO 50% Full */
+#define SPI_STAT_RFIFO_75 0x00003000 /* RFS: RFIFO 75% Full */
+#define SPI_STAT_RFIFO_FULL 0x00004000 /* RFS: RFIFO Full */
+#define SPI_STAT_TFS 0x00070000 /* SPI_TFIFO status */
+#define SPI_STAT_TFIFO_FULL 0x00000000 /* TFS: TFIFO full */
+#define SPI_STAT_TFIFO_25 0x00010000 /* TFS: TFIFO 25% empty */
+#define SPI_STAT_TFIFO_50 0x00020000 /* TFS: TFIFO 50% empty */
+#define SPI_STAT_TFIFO_75 0x00030000 /* TFS: TFIFO 75% empty */
+#define SPI_STAT_TFIFO_EMPTY 0x00040000 /* TFS: TFIFO empty */
+#define SPI_STAT_FCS 0x00100000 /* Flow-Control Stall Indication */
+#define SPI_STAT_RFE 0x00400000 /* SPI_RFIFO Empty */
+#define SPI_STAT_TFF 0x00800000 /* SPI_TFIFO Full */
+/* SPI_ILAT */
+#define SPI_ILAT_RUWMI 0x00000002 /* Receive Urgent Water Mark Interrupt */
+#define SPI_ILAT_TUWMI 0x00000004 /* Transmit Urgent Water Mark Interrupt */
+#define SPI_ILAT_ROI 0x00000010 /* Receive Over-Run Error Indication */
+#define SPI_ILAT_TUI 0x00000020 /* Transmit Under-Run Error Indication */
+#define SPI_ILAT_TCI 0x00000040 /* Transmit Collision Error Indication */
+#define SPI_ILAT_MFI 0x00000080 /* Mode Fault Error Indication */
+#define SPI_ILAT_RSI 0x00000100 /* Receive Start Indication */
+#define SPI_ILAT_TSI 0x00000200 /* Transmit Start Indication */
+#define SPI_ILAT_RFI 0x00000400 /* Receive Finish Indication */
+#define SPI_ILAT_TFI 0x00000800 /* Transmit Finish Indication */
+/* SPI_ILATCL */
+#define SPI_ILAT_CLR_RUWMI 0x00000002 /* Receive Urgent Water Mark Interrupt */
+#define SPI_ILAT_CLR_TUWMI 0x00000004 /* Transmit Urgent Water Mark Interrupt */
+#define SPI_ILAT_CLR_ROI 0x00000010 /* Receive Over-Run Error Indication */
+#define SPI_ILAT_CLR_TUI 0x00000020 /* Transmit Under-Run Error Indication */
+#define SPI_ILAT_CLR_TCI 0x00000040 /* Transmit Collision Error Indication */
+#define SPI_ILAT_CLR_MFI 0x00000080 /* Mode Fault Error Indication */
+#define SPI_ILAT_CLR_RSI 0x00000100 /* Receive Start Indication */
+#define SPI_ILAT_CLR_TSI 0x00000200 /* Transmit Start Indication */
+#define SPI_ILAT_CLR_RFI 0x00000400 /* Receive Finish Indication */
+#define SPI_ILAT_CLR_TFI 0x00000800 /* Transmit Finish Indication */
+
+/*
+ * adi spi3 registers layout
+ */
+struct adi_spi_regs {
+ u32 revid;
+ u32 control;
+ u32 rx_control;
+ u32 tx_control;
+ u32 clock;
+ u32 delay;
+ u32 ssel;
+ u32 rwc;
+ u32 rwcr;
+ u32 twc;
+ u32 twcr;
+ u32 reserved0;
+ u32 emask;
+ u32 emaskcl;
+ u32 emaskst;
+ u32 reserved1;
+ u32 status;
+ u32 elat;
+ u32 elatcl;
+ u32 reserved2;
+ u32 rfifo;
+ u32 reserved3;
+ u32 tfifo;
+};
+
+#define MAX_CTRL_CS 8 /* cs in spi controller */
+
+/* device.platform_data for SSP controller devices */
+struct adi_spi3_master {
+ u16 num_chipselect;
+ u16 pin_req[7];
+};
+
+/* spi_board_info.controller_data for SPI slave devices,
+ * copied to spi_device.platform_data ... mostly for dma tuning
+ */
+struct adi_spi3_chip {
+ u32 control;
+ u16 cs_chg_udelay; /* Some devices require 16-bit delays */
+ u32 tx_dummy_val; /* tx value for rx only transfer */
+ bool enable_dma;
+};
+
+#endif /* _ADI_SPI3_H_ */
projects / deliverable / linux.git / commitdiff
