Zap andes_spi driver since the boards used this driver is no longer been active.
Signed-off-by: Jagannadha Sutradharudu Teki jagannadh.teki@gmail.com Cc: Macpaul Lin macpaul@andestech.com --- drivers/spi/Makefile | 1 - drivers/spi/andes_spi.c | 284 ------------------------------------------------ drivers/spi/andes_spi.h | 115 -------------------- 3 files changed, 400 deletions(-) delete mode 100644 drivers/spi/andes_spi.c delete mode 100644 drivers/spi/andes_spi.h
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index e288692..93065b7 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -17,7 +17,6 @@ endif
obj-$(CONFIG_EP93XX_SPI) += ep93xx_spi.o obj-$(CONFIG_ALTERA_SPI) += altera_spi.o -obj-$(CONFIG_ANDES_SPI) += andes_spi.o obj-$(CONFIG_ARMADA100_SPI) += armada100_spi.o obj-$(CONFIG_ATMEL_DATAFLASH_SPI) += atmel_dataflash_spi.o obj-$(CONFIG_ATMEL_SPI) += atmel_spi.o diff --git a/drivers/spi/andes_spi.c b/drivers/spi/andes_spi.c deleted file mode 100644 index 82aed75..0000000 --- a/drivers/spi/andes_spi.c +++ /dev/null @@ -1,284 +0,0 @@ -/* - * Driver of Andes SPI Controller - * - * (C) Copyright 2011 Andes Technology - * Macpaul Lin macpaul@andestech.com - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <malloc.h> -#include <spi.h> - -#include <asm/io.h> -#include "andes_spi.h" - -void spi_init(void) -{ - /* do nothing */ -} - -static void andes_spi_spit_en(struct andes_spi_slave *ds) -{ - unsigned int dcr = readl(&ds->regs->dcr); - - debug("%s: dcr: %x, write value: %x\n", - __func__, dcr, (dcr | ANDES_SPI_DCR_SPIT)); - - writel((dcr | ANDES_SPI_DCR_SPIT), &ds->regs->dcr); -} - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - struct andes_spi_slave *ds; - - if (!spi_cs_is_valid(bus, cs)) - return NULL; - - ds = spi_alloc_slave(struct andes_spi_slave, bus, cs); - if (!ds) - return NULL; - - ds->regs = (struct andes_spi_regs *)CONFIG_SYS_SPI_BASE; - - /* - * The hardware of andes_spi will set its frequency according - * to APB/AHB bus clock. Hence the hardware doesn't allow changing of - * requency and so the user requested speed is always ignored. - */ - ds->freq = max_hz; - - return &ds->slave; -} - -void spi_free_slave(struct spi_slave *slave) -{ - struct andes_spi_slave *ds = to_andes_spi(slave); - - free(ds); -} - -int spi_claim_bus(struct spi_slave *slave) -{ - struct andes_spi_slave *ds = to_andes_spi(slave); - unsigned int apb; - unsigned int baud; - - /* Enable the SPI hardware */ - writel(ANDES_SPI_CR_SPIRST, &ds->regs->cr); - udelay(1000); - - /* setup format */ - baud = ((CONFIG_SYS_CLK_FREQ / CONFIG_SYS_SPI_CLK / 2) - 1) & 0xFF; - - /* - * SPI_CLK = AHB bus clock / ((BAUD + 1)*2) - * BAUD = AHB bus clock / SPI_CLK / 2) - 1 - */ - apb = (readl(&ds->regs->apb) & 0xffffff00) | baud; - writel(apb, &ds->regs->apb); - - /* no interrupts */ - writel(0, &ds->regs->ie); - - return 0; -} - -void spi_release_bus(struct spi_slave *slave) -{ - struct andes_spi_slave *ds = to_andes_spi(slave); - - /* Disable the SPI hardware */ - writel(ANDES_SPI_CR_SPIRST, &ds->regs->cr); -} - -static int andes_spi_read(struct spi_slave *slave, unsigned int len, - u8 *rxp, unsigned long flags) -{ - struct andes_spi_slave *ds = to_andes_spi(slave); - unsigned int i, left; - unsigned int data; - - debug("%s: slave: %x, len: %d, rxp: %x, flags: %d\n", - __func__, slave, len, rxp, flags); - - debug("%s: data: ", __func__); - while (len > 0) { - left = min(len, 4); - data = readl(&ds->regs->data); - - debug(" "); - for (i = 0; i < left; i++) { - debug("%02x ", data & 0xff); - *rxp++ = data; - data >>= 8; - len--; - } - } - debug("\n"); - - return 0; -} - -static int andes_spi_write(struct spi_slave *slave, unsigned int wlen, - unsigned int rlen, const u8 *txp, unsigned long flags) -{ - struct andes_spi_slave *ds = to_andes_spi(slave); - unsigned int data; - unsigned int i, left; - unsigned int spit_enabled = 0; - - debug("%s: slave: %x, wlen: %d, rlen: %d, txp: %x, flags: %x\n", - __func__, slave, wlen, rlen, txp, flags); - - /* The value of wlen and rlen wrote to register must minus 1 */ - if (rlen == 0) /* write only */ - writel(ANDES_SPI_DCR_MODE_WO | ANDES_SPI_DCR_WCNT(wlen-1) | - ANDES_SPI_DCR_RCNT(0), &ds->regs->dcr); - else /* write then read */ - writel(ANDES_SPI_DCR_MODE_WR | ANDES_SPI_DCR_WCNT(wlen-1) | - ANDES_SPI_DCR_RCNT(rlen-1), &ds->regs->dcr); - - /* wait till SPIBSY is cleared */ - while (readl(&ds->regs->st) & ANDES_SPI_ST_SPIBSY) - ; - - /* data write process */ - debug("%s: txp: ", __func__); - while (wlen > 0) { - /* clear the data */ - data = 0; - - /* data are usually be read 32bits once a time */ - left = min(wlen, 4); - - for (i = 0; i < left; i++) { - debug("%x ", *txp); - data |= *txp++ << (i * 8); - wlen--; - } - debug("\n"); - - debug("data: %08x\n", data); - debug("streg before write: %08x\n", readl(&ds->regs->st)); - /* wait till TXFULL is deasserted */ - while (readl(&ds->regs->st) & ANDES_SPI_ST_TXFEL) - ; - writel(data, &ds->regs->data); - debug("streg after write: %08x\n", readl(&ds->regs->st)); - - - if (spit_enabled == 0) { - /* enable SPIT bit - trigger the tx and rx progress */ - andes_spi_spit_en(ds); - spit_enabled = 1; - } - - } - debug("\n"); - - return 0; -} - -/* - * spi_xfer: - * Since andes_spi doesn't support independent command transaction, - * that is, write and than read must be operated in continuous - * execution, there is no need to set dcr and trigger spit again in - * RX process. - */ -int spi_xfer(struct spi_slave *slave, unsigned int bitlen, - const void *dout, void *din, unsigned long flags) -{ - unsigned int len; - static int op_nextime; - static u8 tmp_cmd[5]; - static int tmp_wlen; - unsigned int i; - - if (bitlen == 0) - /* Finish any previously submitted transfers */ - goto out; - - if (bitlen % 8) { - /* Errors always terminate an ongoing transfer */ - flags |= SPI_XFER_END; - goto out; - } - - len = bitlen / 8; - - debug("%s: slave: %08x, bitlen: %d, dout: " - "%08x, din: %08x, flags: %d, len: %d\n", - __func__, slave, bitlen, dout, din, flags, len); - - /* - * Important: - * andes_spi's hardware doesn't support 2 data channel. The read - * and write cmd/data share the same register (data register). - * - * If a command has write and read transaction, you cannot do write - * this time and then do read on next time. - * - * A command writes first with a read response must indicating - * the read length in write operation. Hence the write action must - * be stored temporary and wait until the next read action has been - * arrived. Then we flush the write and read action out together. - */ - if (!dout) { - if (op_nextime == 1) { - /* flags should be SPI_XFER_END, value is 2 */ - op_nextime = 0; - andes_spi_write(slave, tmp_wlen, len, tmp_cmd, flags); - } - return andes_spi_read(slave, len, din, flags); - } else if (!din) { - if (flags == SPI_XFER_BEGIN) { - /* store the write command and do operation next time */ - op_nextime = 1; - memset(tmp_cmd, 0, sizeof(tmp_cmd)); - memcpy(tmp_cmd, dout, len); - - debug("%s: tmp_cmd: ", __func__); - for (i = 0; i < len; i++) - debug("%x ", *(tmp_cmd + i)); - debug("\n"); - - tmp_wlen = len; - } else { - /* - * flags should be (SPI_XFER_BEGIN | SPI_XFER_END), - * the value is 3. - */ - if (op_nextime == 1) { - /* flags should be SPI_XFER_END, value is 2 */ - op_nextime = 0; - /* flags 3 implies write only */ - andes_spi_write(slave, tmp_wlen, 0, tmp_cmd, 3); - } - - debug("flags: %x\n", flags); - return andes_spi_write(slave, len, 0, dout, flags); - } - } - -out: - return 0; -} - -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - return bus == 0 && cs == 0; -} - -void spi_cs_activate(struct spi_slave *slave) -{ - /* do nothing */ -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - /* do nothing */ -} diff --git a/drivers/spi/andes_spi.h b/drivers/spi/andes_spi.h deleted file mode 100644 index b7d2945..0000000 --- a/drivers/spi/andes_spi.h +++ /dev/null @@ -1,115 +0,0 @@ -/* - * Register definitions for the Andes SPI Controller - * - * (C) Copyright 2011 Andes Technology - * Macpaul Lin macpaul@andestech.com - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#ifndef __ANDES_SPI_H -#define __ANDES_SPI_H - -struct andes_spi_regs { - unsigned int apb; /* 0x00 - APB SPI interface setting */ - unsigned int pio; /* 0x04 - PIO reg */ - unsigned int cr; /* 0x08 - SPI Control reg */ - unsigned int st; /* 0x0c - SPI Status reg */ - unsigned int ie; /* 0x10 - Interrupt Enable reg */ - unsigned int ist; /* 0x14 - Interrupt Status reg */ - unsigned int dcr; /* 0x18 - data control reg */ - unsigned int data; /* 0x1c - data register */ - unsigned int ahb; /* 0x20 - AHB SPI interface setting */ - unsigned int ver; /* 0x3c - SPI version reg */ -}; - -#define BIT(x) (1 << (x)) - -/* 0x00 - APB SPI interface setting register */ -#define ANDES_SPI_APB_BAUD(x) (((x) & 0xff) < 0) -#define ANDES_SPI_APB_CSHT(x) (((x) & 0xf) < 16) -#define ANDES_SPI_APB_SPNTS BIT(20) /* 0: normal, 1: delay */ -#define ANDES_SPI_APB_CPHA BIT(24) /* 0: Sampling at odd edges */ -#define ANDES_SPI_APB_CPOL BIT(25) /* 0: SCK low, 1: SCK high */ -#define ANDES_SPI_APB_MSSL BIT(26) /* 0: SPI Master, 1: slave */ - -/* 0x04 - PIO register */ -#define ANDES_SPI_PIO_MISO BIT(0) /* input value of pin MISO */ -#define ANDES_SPI_PIO_MOSI BIT(1) /* I/O value of pin MOSI */ -#define ANDES_SPI_PIO_SCK BIT(2) /* I/O value of pin SCK */ -#define ANDES_SPI_PIO_CS BIT(3) /* I/O value of pin CS */ -#define ANDES_SPI_PIO_PIOE BIT(4) /* Programming IO Enable */ - -/* 0x08 - SPI Control register */ -#define ANDES_SPI_CR_SPIRST BIT(0) /* SPI mode reset */ -#define ANDES_SPI_CR_RXFRST BIT(1) /* RxFIFO reset */ -#define ANDES_SPI_CR_TXFRST BIT(2) /* TxFIFO reset */ -#define ANDES_SPI_CR_RXFTH(x) (((x) & 0x1f) << 10) /* RxFIFO Threshold */ -#define ANDES_SPI_CR_TXFTH(x) (((x) & 0x1f) << 18) /* TxFIFO Threshold */ - -/* 0x0c - SPI Status register */ -#define ANDES_SPI_ST_SPIBSY BIT(0) /* SPI Transfer is active */ -#define ANDES_SPI_ST_RXFEM BIT(8) /* RxFIFO Empty Flag */ -#define ANDES_SPI_ST_RXFEL BIT(9) /* RxFIFO Full Flag */ -#define ANDES_SPI_ST_RXFVE(x) (((x) >> 10) & 0x1f) -#define ANDES_SPI_ST_TXFEM BIT(16) /* TxFIFO Empty Flag */ -#define ANDES_SPI_ST_TXFEL BIT(7) /* TxFIFO Full Flag */ -#define ANDES_SPI_ST_TXFVE(x) (((x) >> 18) & 0x1f) - -/* 0x10 - Interrupt Enable register */ -#define ANDES_SPI_IE_RXFORIE BIT(0) /* RxFIFO overrun intr */ -#define ANDES_SPI_IE_TXFURIE BIT(1) /* TxFOFO underrun intr */ -#define ANDES_SPI_IE_RXFTHIE BIT(2) /* RxFIFO threshold intr */ -#define ANDES_SPI_IE_TXFTHIE BIT(3) /* TxFIFO threshold intr */ -#define ANDES_SPI_IE_SPIEIE BIT(4) /* SPI transmit END intr */ -#define ANDES_SPI_IE_SPCFIE BIT(5) /* AHB/APB TxReq conflict */ - -/* 0x14 - Interrupt Status Register */ -#define ANDES_SPI_IST_RXFORI BIT(0) /* has RxFIFO overrun */ -#define ANDES_SPI_IST_TXFURI BIT(1) /* has TxFOFO underrun */ -#define ANDES_SPI_IST_RXFTHI BIT(2) /* has RxFIFO threshold */ -#define ANDES_SPI_IST_TXFTHI BIT(3) /* has TxFIFO threshold */ -#define ANDES_SPI_IST_SPIEI BIT(4) /* has SPI transmit END */ -#define ANDES_SPI_IST_SPCFI BIT(5) /* has AHB/APB TxReq conflict */ - -/* 0x18 - Data Control Register */ -#define ANDES_SPI_DCR_RCNT(x) (((x) & 0x3ff) << 0) -#define ANDES_SPI_DCR_DYCNT(x) (((x) & 0x7) << 12) -#define ANDES_SPI_DCR_WCNT(x) (((x) & 0x3ff) << 16) -#define ANDES_SPI_DCR_TRAMODE(x) (((x) & 0x7) << 28) -#define ANDES_SPI_DCR_SPIT BIT(31) /* SPI bus trigger */ - -#define ANDES_SPI_DCR_MODE_WRCON ANDES_SPI_DCR_TRAMODE(0) /* w/r at the same time */ -#define ANDES_SPI_DCR_MODE_WO ANDES_SPI_DCR_TRAMODE(1) /* write only */ -#define ANDES_SPI_DCR_MODE_RO ANDES_SPI_DCR_TRAMODE(2) /* read only */ -#define ANDES_SPI_DCR_MODE_WR ANDES_SPI_DCR_TRAMODE(3) /* write, read */ -#define ANDES_SPI_DCR_MODE_RW ANDES_SPI_DCR_TRAMODE(4) /* read, write */ -#define ANDES_SPI_DCR_MODE_WDR ANDES_SPI_DCR_TRAMODE(5) /* write, dummy, read */ -#define ANDES_SPI_DCR_MODE_RDW ANDES_SPI_DCR_TRAMODE(6) /* read, dummy, write */ -#define ANDES_SPI_DCR_MODE_RECEIVE ANDES_SPI_DCR_TRAMODE(7) /* receive */ - -/* 0x20 - AHB SPI interface setting register */ -#define ANDES_SPI_AHB_BAUD(x) (((x) & 0xff) < 0) -#define ANDES_SPI_AHB_CSHT(x) (((x) & 0xf) < 16) -#define ANDES_SPI_AHB_SPNTS BIT(20) /* 0: normal, 1: delay */ -#define ANDES_SPI_AHB_CPHA BIT(24) /* 0: Sampling at odd edges */ -#define ANDES_SPI_AHB_CPOL BIT(25) /* 0: SCK low, 1: SCK high */ -#define ANDES_SPI_AHB_MSSL BIT(26) /* only Master mode */ - -/* 0x3c - Version Register - (Year V.MAJOR.MINOR) */ -#define ANDES_SPI_VER_MINOR(x) (((x) >> 0) & 0xf) -#define ANDES_SPI_VER_MAJOR(x) (((x) >> 8) & 0xf) -#define ANDES_SPI_VER_YEAR(x) (((x) >> 16) & 0xf) - -struct andes_spi_slave { - struct spi_slave slave; - struct andes_spi_regs *regs; - unsigned int freq; -}; - -static inline struct andes_spi_slave *to_andes_spi(struct spi_slave *slave) -{ - return container_of(slave, struct andes_spi_slave, slave); -} - -#endif /* __ANDES_SPI_H */