mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-17 17:53:56 +08:00
spi: remove w90x900 driver
The ARM w90x900 platform is getting removed, so this driver is obsolete. Link: https://lore.kernel.org/r/20190809202749.742267-8-arnd@arndb.de Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
parent
00d2fbf73d
commit
305e503b14
@ -440,13 +440,6 @@ config SPI_NPCM_PSPI
|
||||
This driver provides support for Nuvoton NPCM BMC
|
||||
Peripheral SPI controller in master mode.
|
||||
|
||||
config SPI_NUC900
|
||||
tristate "Nuvoton NUC900 series SPI"
|
||||
depends on ARCH_W90X900
|
||||
select SPI_BITBANG
|
||||
help
|
||||
SPI driver for Nuvoton NUC900 series ARM SoCs
|
||||
|
||||
config SPI_LANTIQ_SSC
|
||||
tristate "Lantiq SSC SPI controller"
|
||||
depends on LANTIQ || COMPILE_TEST
|
||||
|
||||
@ -64,7 +64,6 @@ obj-$(CONFIG_SPI_MT7621) += spi-mt7621.o
|
||||
obj-$(CONFIG_SPI_MXIC) += spi-mxic.o
|
||||
obj-$(CONFIG_SPI_MXS) += spi-mxs.o
|
||||
obj-$(CONFIG_SPI_NPCM_PSPI) += spi-npcm-pspi.o
|
||||
obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o
|
||||
obj-$(CONFIG_SPI_NXP_FLEXSPI) += spi-nxp-fspi.o
|
||||
obj-$(CONFIG_SPI_OC_TINY) += spi-oc-tiny.o
|
||||
spi-octeon-objs := spi-cavium.o spi-cavium-octeon.o
|
||||
|
||||
@ -1,429 +0,0 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Copyright (c) 2009 Nuvoton technology.
|
||||
* Wan ZongShun <mcuos.com@gmail.com>
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/gpio.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/spi/spi_bitbang.h>
|
||||
|
||||
#include <linux/platform_data/spi-nuc900.h>
|
||||
|
||||
/* usi registers offset */
|
||||
#define USI_CNT 0x00
|
||||
#define USI_DIV 0x04
|
||||
#define USI_SSR 0x08
|
||||
#define USI_RX0 0x10
|
||||
#define USI_TX0 0x10
|
||||
|
||||
/* usi register bit */
|
||||
#define ENINT (0x01 << 17)
|
||||
#define ENFLG (0x01 << 16)
|
||||
#define SLEEP (0x0f << 12)
|
||||
#define TXNUM (0x03 << 8)
|
||||
#define TXBITLEN (0x1f << 3)
|
||||
#define TXNEG (0x01 << 2)
|
||||
#define RXNEG (0x01 << 1)
|
||||
#define LSB (0x01 << 10)
|
||||
#define SELECTLEV (0x01 << 2)
|
||||
#define SELECTPOL (0x01 << 31)
|
||||
#define SELECTSLAVE 0x01
|
||||
#define GOBUSY 0x01
|
||||
|
||||
struct nuc900_spi {
|
||||
struct spi_bitbang bitbang;
|
||||
struct completion done;
|
||||
void __iomem *regs;
|
||||
int irq;
|
||||
int len;
|
||||
int count;
|
||||
const unsigned char *tx;
|
||||
unsigned char *rx;
|
||||
struct clk *clk;
|
||||
struct spi_master *master;
|
||||
struct nuc900_spi_info *pdata;
|
||||
spinlock_t lock;
|
||||
};
|
||||
|
||||
static inline struct nuc900_spi *to_hw(struct spi_device *sdev)
|
||||
{
|
||||
return spi_master_get_devdata(sdev->master);
|
||||
}
|
||||
|
||||
static void nuc900_slave_select(struct spi_device *spi, unsigned int ssr)
|
||||
{
|
||||
struct nuc900_spi *hw = to_hw(spi);
|
||||
unsigned int val;
|
||||
unsigned int cs = spi->mode & SPI_CS_HIGH ? 1 : 0;
|
||||
unsigned int cpol = spi->mode & SPI_CPOL ? 1 : 0;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_SSR);
|
||||
|
||||
if (!cs)
|
||||
val &= ~SELECTLEV;
|
||||
else
|
||||
val |= SELECTLEV;
|
||||
|
||||
if (!ssr)
|
||||
val &= ~SELECTSLAVE;
|
||||
else
|
||||
val |= SELECTSLAVE;
|
||||
|
||||
__raw_writel(val, hw->regs + USI_SSR);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT);
|
||||
|
||||
if (!cpol)
|
||||
val &= ~SELECTPOL;
|
||||
else
|
||||
val |= SELECTPOL;
|
||||
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static void nuc900_spi_chipsel(struct spi_device *spi, int value)
|
||||
{
|
||||
switch (value) {
|
||||
case BITBANG_CS_INACTIVE:
|
||||
nuc900_slave_select(spi, 0);
|
||||
break;
|
||||
|
||||
case BITBANG_CS_ACTIVE:
|
||||
nuc900_slave_select(spi, 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void nuc900_spi_setup_txnum(struct nuc900_spi *hw, unsigned int txnum)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT) & ~TXNUM;
|
||||
|
||||
if (txnum)
|
||||
val |= txnum << 0x08;
|
||||
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
|
||||
}
|
||||
|
||||
static void nuc900_spi_setup_txbitlen(struct nuc900_spi *hw,
|
||||
unsigned int txbitlen)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT) & ~TXBITLEN;
|
||||
|
||||
val |= (txbitlen << 0x03);
|
||||
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static void nuc900_spi_gobusy(struct nuc900_spi *hw)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT);
|
||||
|
||||
val |= GOBUSY;
|
||||
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
|
||||
{
|
||||
return hw->tx ? hw->tx[count] : 0;
|
||||
}
|
||||
|
||||
static int nuc900_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
|
||||
{
|
||||
struct nuc900_spi *hw = to_hw(spi);
|
||||
|
||||
hw->tx = t->tx_buf;
|
||||
hw->rx = t->rx_buf;
|
||||
hw->len = t->len;
|
||||
hw->count = 0;
|
||||
|
||||
__raw_writel(hw_txbyte(hw, 0x0), hw->regs + USI_TX0);
|
||||
|
||||
nuc900_spi_gobusy(hw);
|
||||
|
||||
wait_for_completion(&hw->done);
|
||||
|
||||
return hw->count;
|
||||
}
|
||||
|
||||
static irqreturn_t nuc900_spi_irq(int irq, void *dev)
|
||||
{
|
||||
struct nuc900_spi *hw = dev;
|
||||
unsigned int status;
|
||||
unsigned int count = hw->count;
|
||||
|
||||
status = __raw_readl(hw->regs + USI_CNT);
|
||||
__raw_writel(status, hw->regs + USI_CNT);
|
||||
|
||||
if (status & ENFLG) {
|
||||
hw->count++;
|
||||
|
||||
if (hw->rx)
|
||||
hw->rx[count] = __raw_readl(hw->regs + USI_RX0);
|
||||
count++;
|
||||
|
||||
if (count < hw->len) {
|
||||
__raw_writel(hw_txbyte(hw, count), hw->regs + USI_TX0);
|
||||
nuc900_spi_gobusy(hw);
|
||||
} else {
|
||||
complete(&hw->done);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
complete(&hw->done);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void nuc900_tx_edge(struct nuc900_spi *hw, unsigned int edge)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT);
|
||||
|
||||
if (edge)
|
||||
val |= TXNEG;
|
||||
else
|
||||
val &= ~TXNEG;
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static void nuc900_rx_edge(struct nuc900_spi *hw, unsigned int edge)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT);
|
||||
|
||||
if (edge)
|
||||
val |= RXNEG;
|
||||
else
|
||||
val &= ~RXNEG;
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static void nuc900_send_first(struct nuc900_spi *hw, unsigned int lsb)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT);
|
||||
|
||||
if (lsb)
|
||||
val |= LSB;
|
||||
else
|
||||
val &= ~LSB;
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static void nuc900_set_sleep(struct nuc900_spi *hw, unsigned int sleep)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT) & ~SLEEP;
|
||||
|
||||
if (sleep)
|
||||
val |= (sleep << 12);
|
||||
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static void nuc900_enable_int(struct nuc900_spi *hw)
|
||||
{
|
||||
unsigned int val;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&hw->lock, flags);
|
||||
|
||||
val = __raw_readl(hw->regs + USI_CNT);
|
||||
|
||||
val |= ENINT;
|
||||
|
||||
__raw_writel(val, hw->regs + USI_CNT);
|
||||
|
||||
spin_unlock_irqrestore(&hw->lock, flags);
|
||||
}
|
||||
|
||||
static void nuc900_set_divider(struct nuc900_spi *hw)
|
||||
{
|
||||
__raw_writel(hw->pdata->divider, hw->regs + USI_DIV);
|
||||
}
|
||||
|
||||
static void nuc900_init_spi(struct nuc900_spi *hw)
|
||||
{
|
||||
clk_enable(hw->clk);
|
||||
spin_lock_init(&hw->lock);
|
||||
|
||||
nuc900_tx_edge(hw, hw->pdata->txneg);
|
||||
nuc900_rx_edge(hw, hw->pdata->rxneg);
|
||||
nuc900_send_first(hw, hw->pdata->lsb);
|
||||
nuc900_set_sleep(hw, hw->pdata->sleep);
|
||||
nuc900_spi_setup_txbitlen(hw, hw->pdata->txbitlen);
|
||||
nuc900_spi_setup_txnum(hw, hw->pdata->txnum);
|
||||
nuc900_set_divider(hw);
|
||||
nuc900_enable_int(hw);
|
||||
}
|
||||
|
||||
static int nuc900_spi_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct nuc900_spi *hw;
|
||||
struct spi_master *master;
|
||||
struct resource *res;
|
||||
int err = 0;
|
||||
|
||||
master = spi_alloc_master(&pdev->dev, sizeof(struct nuc900_spi));
|
||||
if (master == NULL) {
|
||||
dev_err(&pdev->dev, "No memory for spi_master\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
hw = spi_master_get_devdata(master);
|
||||
hw->master = master;
|
||||
hw->pdata = dev_get_platdata(&pdev->dev);
|
||||
|
||||
if (hw->pdata == NULL) {
|
||||
dev_err(&pdev->dev, "No platform data supplied\n");
|
||||
err = -ENOENT;
|
||||
goto err_pdata;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, hw);
|
||||
init_completion(&hw->done);
|
||||
|
||||
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
|
||||
if (hw->pdata->lsb)
|
||||
master->mode_bits |= SPI_LSB_FIRST;
|
||||
master->num_chipselect = hw->pdata->num_cs;
|
||||
master->bus_num = hw->pdata->bus_num;
|
||||
hw->bitbang.master = hw->master;
|
||||
hw->bitbang.chipselect = nuc900_spi_chipsel;
|
||||
hw->bitbang.txrx_bufs = nuc900_spi_txrx;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
hw->regs = devm_ioremap_resource(&pdev->dev, res);
|
||||
if (IS_ERR(hw->regs)) {
|
||||
err = PTR_ERR(hw->regs);
|
||||
goto err_pdata;
|
||||
}
|
||||
|
||||
hw->irq = platform_get_irq(pdev, 0);
|
||||
if (hw->irq < 0) {
|
||||
dev_err(&pdev->dev, "No IRQ specified\n");
|
||||
err = -ENOENT;
|
||||
goto err_pdata;
|
||||
}
|
||||
|
||||
err = devm_request_irq(&pdev->dev, hw->irq, nuc900_spi_irq, 0,
|
||||
pdev->name, hw);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "Cannot claim IRQ\n");
|
||||
goto err_pdata;
|
||||
}
|
||||
|
||||
hw->clk = devm_clk_get(&pdev->dev, "spi");
|
||||
if (IS_ERR(hw->clk)) {
|
||||
dev_err(&pdev->dev, "No clock for device\n");
|
||||
err = PTR_ERR(hw->clk);
|
||||
goto err_pdata;
|
||||
}
|
||||
|
||||
mfp_set_groupg(&pdev->dev, NULL);
|
||||
nuc900_init_spi(hw);
|
||||
|
||||
err = spi_bitbang_start(&hw->bitbang);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "Failed to register SPI master\n");
|
||||
goto err_register;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_register:
|
||||
clk_disable(hw->clk);
|
||||
err_pdata:
|
||||
spi_master_put(hw->master);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int nuc900_spi_remove(struct platform_device *dev)
|
||||
{
|
||||
struct nuc900_spi *hw = platform_get_drvdata(dev);
|
||||
|
||||
spi_bitbang_stop(&hw->bitbang);
|
||||
clk_disable(hw->clk);
|
||||
spi_master_put(hw->master);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver nuc900_spi_driver = {
|
||||
.probe = nuc900_spi_probe,
|
||||
.remove = nuc900_spi_remove,
|
||||
.driver = {
|
||||
.name = "nuc900-spi",
|
||||
},
|
||||
};
|
||||
module_platform_driver(nuc900_spi_driver);
|
||||
|
||||
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
|
||||
MODULE_DESCRIPTION("nuc900 spi driver!");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:nuc900-spi");
|
||||
@ -550,7 +550,6 @@ header-test- += linux/platform_data/sky81452-backlight.h
|
||||
header-test- += linux/platform_data/spi-davinci.h
|
||||
header-test- += linux/platform_data/spi-ep93xx.h
|
||||
header-test- += linux/platform_data/spi-mt65xx.h
|
||||
header-test- += linux/platform_data/spi-nuc900.h
|
||||
header-test- += linux/platform_data/st_sensors_pdata.h
|
||||
header-test- += linux/platform_data/ti-sysc.h
|
||||
header-test- += linux/platform_data/timer-ixp4xx.h
|
||||
|
||||
@ -1,29 +0,0 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
/*
|
||||
* Copyright (c) 2009 Nuvoton technology corporation.
|
||||
*
|
||||
* Wan ZongShun <mcuos.com@gmail.com>
|
||||
*/
|
||||
|
||||
#ifndef __SPI_NUC900_H
|
||||
#define __SPI_NUC900_H
|
||||
|
||||
extern void mfp_set_groupg(struct device *dev, const char *subname);
|
||||
|
||||
struct nuc900_spi_info {
|
||||
unsigned int num_cs;
|
||||
unsigned int lsb;
|
||||
unsigned int txneg;
|
||||
unsigned int rxneg;
|
||||
unsigned int divider;
|
||||
unsigned int sleep;
|
||||
unsigned int txnum;
|
||||
unsigned int txbitlen;
|
||||
int bus_num;
|
||||
};
|
||||
|
||||
struct nuc900_spi_chip {
|
||||
unsigned char bits_per_word;
|
||||
};
|
||||
|
||||
#endif /* __SPI_NUC900_H */
|
||||
Loading…
Reference in New Issue
Block a user