Commit 478e4e9d authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6

* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (23 commits)
  spi: fix probe/remove section markings
  Add OMAP spi100k driver
  spi-imx: don't access struct device directly but use dev_get_platdata
  spi-imx: Add mx25 support
  spi-imx: use positive logic to distinguish cpu variants
  spi-imx: correct check for platform_get_irq failing
  ARM: NUC900: Add spi driver support for nuc900
  spi: SuperH MSIOF SPI Master driver V2
  spi: fix spidev compilation failure when VERBOSE is defined
  spi/au1550_spi: fix setupxfer not to override cfg with zeros
  spi/mpc8xxx: don't use __exit_p to wrap plat_mpc8xxx_spi_remove
  spi/i.MX: fix broken error handling for gpio_request
  spi/i.mx: drain MXC SPI transfer buffer when probing device
  MAINTAINERS: add SPI co-maintainer.
  spi/xilinx_spi: fix incorrect casting
  spi/mpc52xx-spi: minor cleanups
  xilinx_spi: add a platform driver using the xilinx_spi common module.
  xilinx_spi: add support for the DS570 IP.
  xilinx_spi: Switch to iomem functions and support little endian.
  xilinx_spi: Split into of driver and generic part.
  ...
parents 2205afa7 965346e3
......@@ -5080,6 +5080,7 @@ F: drivers/char/specialix*
SPI SUBSYSTEM
M: David Brownell <dbrownell@users.sourceforge.net>
M: Grant Likely <grant.likely@secretlab.ca>
L: spi-devel-general@lists.sourceforge.net
S: Maintained
F: Documentation/spi/
......
/*
* arch/arm/mach-w90x900/include/mach/nuc900_spi.h
*
* Copyright (c) 2009 Nuvoton technology corporation.
*
* Wan ZongShun <mcuos.com@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation;version 2 of the License.
*
*/
#ifndef __ASM_ARCH_SPI_H
#define __ASM_ARCH_SPI_H
extern void mfp_set_groupg(struct device *dev);
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 /* __ASM_ARCH_SPI_H */
......@@ -169,6 +169,12 @@ config SPI_OMAP24XX
SPI master controller for OMAP24xx/OMAP34xx Multichannel SPI
(McSPI) modules.
config SPI_OMAP_100K
tristate "OMAP SPI 100K"
depends on SPI_MASTER && (ARCH_OMAP850 || ARCH_OMAP730)
help
OMAP SPI 100K master controller for omap7xx boards.
config SPI_ORION
tristate "Orion SPI master (EXPERIMENTAL)"
depends on PLAT_ORION && EXPERIMENTAL
......@@ -220,6 +226,13 @@ config SPI_S3C24XX_GPIO
the inbuilt hardware cannot provide the transfer mode, or
where the board is using non hardware connected pins.
config SPI_SH_MSIOF
tristate "SuperH MSIOF SPI controller"
depends on SUPERH && HAVE_CLK
select SPI_BITBANG
help
SPI driver for SuperH MSIOF blocks.
config SPI_SH_SCI
tristate "SuperH SCI SPI controller"
depends on SUPERH
......@@ -240,15 +253,38 @@ config SPI_TXX9
SPI driver for Toshiba TXx9 MIPS SoCs
config SPI_XILINX
tristate "Xilinx SPI controller"
depends on (XILINX_VIRTEX || MICROBLAZE) && EXPERIMENTAL
tristate "Xilinx SPI controller common module"
depends on HAS_IOMEM && EXPERIMENTAL
select SPI_BITBANG
select SPI_XILINX_OF if (XILINX_VIRTEX || MICROBLAZE)
help
This exposes the SPI controller IP from the Xilinx EDK.
See the "OPB Serial Peripheral Interface (SPI) (v1.00e)"
Product Specification document (DS464) for hardware details.
Or for the DS570, see "XPS Serial Peripheral Interface (SPI) (v2.00b)"
config SPI_XILINX_OF
tristate "Xilinx SPI controller OF device"
depends on SPI_XILINX && (XILINX_VIRTEX || MICROBLAZE)
help
This is the OF driver for the SPI controller IP from the Xilinx EDK.
config SPI_XILINX_PLTFM
tristate "Xilinx SPI controller platform device"
depends on SPI_XILINX
help
This is the platform driver for the SPI controller IP
from the Xilinx EDK.
config SPI_NUC900
tristate "Nuvoton NUC900 series SPI"
depends on ARCH_W90X900 && EXPERIMENTAL
select SPI_BITBANG
help
SPI driver for Nuvoton NUC900 series ARM SoCs
#
# Add new SPI master controllers in alphabetical order above this line
#
......
......@@ -22,6 +22,7 @@ obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o
obj-$(CONFIG_SPI_PXA2XX) += pxa2xx_spi.o
obj-$(CONFIG_SPI_OMAP_UWIRE) += omap_uwire.o
obj-$(CONFIG_SPI_OMAP24XX) += omap2_mcspi.o
obj-$(CONFIG_SPI_OMAP_100K) += omap_spi_100k.o
obj-$(CONFIG_SPI_ORION) += orion_spi.o
obj-$(CONFIG_SPI_PL022) += amba-pl022.o
obj-$(CONFIG_SPI_MPC52xx_PSC) += mpc52xx_psc_spi.o
......@@ -32,8 +33,12 @@ obj-$(CONFIG_SPI_S3C24XX_GPIO) += spi_s3c24xx_gpio.o
obj-$(CONFIG_SPI_S3C24XX) += spi_s3c24xx.o
obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
obj-$(CONFIG_SPI_XILINX_OF) += xilinx_spi_of.o
obj-$(CONFIG_SPI_XILINX_PLTFM) += xilinx_spi_pltfm.o
obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o
obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o
obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
obj-$(CONFIG_SPI_NUC900) += spi_nuc900.o
# ... add above this line ...
# SPI protocol drivers (device/link on bus)
......
......@@ -237,8 +237,14 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
unsigned bpw, hz;
u32 cfg, stat;
bpw = t ? t->bits_per_word : spi->bits_per_word;
hz = t ? t->speed_hz : spi->max_speed_hz;
bpw = spi->bits_per_word;
hz = spi->max_speed_hz;
if (t) {
if (t->bits_per_word)
bpw = t->bits_per_word;
if (t->speed_hz)
hz = t->speed_hz;
}
if (bpw < 4 || bpw > 24) {
dev_err(&spi->dev, "setupxfer: invalid bits_per_word=%d\n",
......
......@@ -18,9 +18,9 @@
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/spi/mpc52xx_spi.h>
#include <linux/of_spi.h>
#include <linux/io.h>
#include <linux/of_gpio.h>
#include <asm/time.h>
#include <asm/mpc52xx.h>
......@@ -53,7 +53,7 @@ MODULE_LICENSE("GPL");
/* FSM state return values */
#define FSM_STOP 0 /* Nothing more for the state machine to */
/* do. If something interesting happens */
/* then and IRQ will be received */
/* then an IRQ will be received */
#define FSM_POLL 1 /* need to poll for completion, an IRQ is */
/* not expected */
#define FSM_CONTINUE 2 /* Keep iterating the state machine */
......@@ -61,13 +61,12 @@ MODULE_LICENSE("GPL");
/* Driver internal data */
struct mpc52xx_spi {
struct spi_master *master;
u32 sysclk;
void __iomem *regs;
int irq0; /* MODF irq */
int irq1; /* SPIF irq */
int ipb_freq;
unsigned int ipb_freq;
/* Statistics */
/* Statistics; not used now, but will be reintroduced for debugfs */
int msg_count;
int wcol_count;
int wcol_ticks;
......@@ -79,7 +78,6 @@ struct mpc52xx_spi {
spinlock_t lock;
struct work_struct work;
/* Details of current transfer (length, and buffer pointers) */
struct spi_message *message; /* current message */
struct spi_transfer *transfer; /* current transfer */
......@@ -89,6 +87,8 @@ struct mpc52xx_spi {
u8 *rx_buf;
const u8 *tx_buf;
int cs_change;
int gpio_cs_count;
unsigned int *gpio_cs;
};
/*
......@@ -96,7 +96,13 @@ struct mpc52xx_spi {
*/
static void mpc52xx_spi_chipsel(struct mpc52xx_spi *ms, int value)
{
out_8(ms->regs + SPI_PORTDATA, value ? 0 : 0x08);
int cs;
if (ms->gpio_cs_count > 0) {
cs = ms->message->spi->chip_select;
gpio_set_value(ms->gpio_cs[cs], value ? 0 : 1);
} else
out_8(ms->regs + SPI_PORTDATA, value ? 0 : 0x08);
}
/*
......@@ -221,7 +227,7 @@ static int mpc52xx_spi_fsmstate_transfer(int irq, struct mpc52xx_spi *ms,
ms->wcol_tx_timestamp = get_tbl();
data = 0;
if (ms->tx_buf)
data = *(ms->tx_buf-1);
data = *(ms->tx_buf - 1);
out_8(ms->regs + SPI_DATA, data); /* try again */
return FSM_CONTINUE;
} else if (status & SPI_STATUS_MODF) {
......@@ -390,7 +396,9 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
struct spi_master *master;
struct mpc52xx_spi *ms;
void __iomem *regs;
int rc;
u8 ctrl1;
int rc, i = 0;
int gpio_cs;
/* MMIO registers */
dev_dbg(&op->dev, "probing mpc5200 SPI device\n");
......@@ -399,7 +407,8 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
return -ENODEV;
/* initialize the device */
out_8(regs+SPI_CTRL1, SPI_CTRL1_SPIE | SPI_CTRL1_SPE | SPI_CTRL1_MSTR);
ctrl1 = SPI_CTRL1_SPIE | SPI_CTRL1_SPE | SPI_CTRL1_MSTR;
out_8(regs + SPI_CTRL1, ctrl1);
out_8(regs + SPI_CTRL2, 0x0);
out_8(regs + SPI_DATADIR, 0xe); /* Set output pins */
out_8(regs + SPI_PORTDATA, 0x8); /* Deassert /SS signal */
......@@ -409,6 +418,8 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
* on the SPI bus. This fault will also occur if the SPI signals
* are not connected to any pins (port_config setting) */
in_8(regs + SPI_STATUS);
out_8(regs + SPI_CTRL1, ctrl1);
in_8(regs + SPI_DATA);
if (in_8(regs + SPI_STATUS) & SPI_STATUS_MODF) {
dev_err(&op->dev, "mode fault; is port_config correct?\n");
......@@ -422,10 +433,12 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
rc = -ENOMEM;
goto err_alloc;
}
master->bus_num = -1;
master->num_chipselect = 1;
master->setup = mpc52xx_spi_setup;
master->transfer = mpc52xx_spi_transfer;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
dev_set_drvdata(&op->dev, master);
ms = spi_master_get_devdata(master);
......@@ -435,16 +448,51 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
ms->irq1 = irq_of_parse_and_map(op->node, 1);
ms->state = mpc52xx_spi_fsmstate_idle;
ms->ipb_freq = mpc5xxx_get_bus_frequency(op->node);
ms->gpio_cs_count = of_gpio_count(op->node);
if (ms->gpio_cs_count > 0) {
master->num_chipselect = ms->gpio_cs_count;
ms->gpio_cs = kmalloc(ms->gpio_cs_count * sizeof(unsigned int),
GFP_KERNEL);
if (!ms->gpio_cs) {
rc = -ENOMEM;
goto err_alloc;
}
for (i = 0; i < ms->gpio_cs_count; i++) {
gpio_cs = of_get_gpio(op->node, i);
if (gpio_cs < 0) {
dev_err(&op->dev,
"could not parse the gpio field "
"in oftree\n");
rc = -ENODEV;
goto err_gpio;
}
rc = gpio_request(gpio_cs, dev_name(&op->dev));
if (rc) {
dev_err(&op->dev,
"can't request spi cs gpio #%d "
"on gpio line %d\n", i, gpio_cs);
goto err_gpio;
}
gpio_direction_output(gpio_cs, 1);
ms->gpio_cs[i] = gpio_cs;
}
} else {
master->num_chipselect = 1;
}
spin_lock_init(&ms->lock);
INIT_LIST_HEAD(&ms->queue);
INIT_WORK(&ms->work, mpc52xx_spi_wq);
/* Decide if interrupts can be used */
if (ms->irq0 && ms->irq1) {
rc = request_irq(ms->irq0, mpc52xx_spi_irq, IRQF_SAMPLE_RANDOM,
rc = request_irq(ms->irq0, mpc52xx_spi_irq, 0,
"mpc5200-spi-modf", ms);
rc |= request_irq(ms->irq1, mpc52xx_spi_irq, IRQF_SAMPLE_RANDOM,
"mpc5200-spi-spiF", ms);
rc |= request_irq(ms->irq1, mpc52xx_spi_irq, 0,
"mpc5200-spi-spif", ms);
if (rc) {
free_irq(ms->irq0, ms);
free_irq(ms->irq1, ms);
......@@ -471,6 +519,11 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
err_register:
dev_err(&ms->master->dev, "initialization failed\n");
spi_master_put(master);
err_gpio:
while (i-- > 0)
gpio_free(ms->gpio_cs[i]);
kfree(ms->gpio_cs);
err_alloc:
err_init:
iounmap(regs);
......@@ -481,10 +534,15 @@ static int __devexit mpc52xx_spi_remove(struct of_device *op)
{
struct spi_master *master = dev_get_drvdata(&op->dev);
struct mpc52xx_spi *ms = spi_master_get_devdata(master);
int i;
free_irq(ms->irq0, ms);
free_irq(ms->irq1, ms);
for (i = 0; i < ms->gpio_cs_count; i++)
gpio_free(ms->gpio_cs[i]);
kfree(ms->gpio_cs);
spi_unregister_master(master);
spi_master_put(master);
iounmap(ms->regs);
......
This diff is collapsed.
......@@ -44,6 +44,9 @@
#define MXC_CSPIINT 0x0c
#define MXC_RESET 0x1c
#define MX3_CSPISTAT 0x14
#define MX3_CSPISTAT_RR (1 << 3)
/* generic defines to abstract from the different register layouts */
#define MXC_INT_RR (1 << 0) /* Receive data ready interrupt */
#define MXC_INT_TE (1 << 1) /* Transmit FIFO empty interrupt */
......@@ -205,7 +208,7 @@ static int mx31_config(struct spi_imx_data *spi_imx,
if (cpu_is_mx31())
reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;
else if (cpu_is_mx35()) {
else if (cpu_is_mx25() || cpu_is_mx35()) {
reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
reg |= MX31_CSPICTRL_SSCTL;
}
......@@ -219,7 +222,7 @@ static int mx31_config(struct spi_imx_data *spi_imx,
if (config->cs < 0) {
if (cpu_is_mx31())
reg |= (config->cs + 32) << MX31_CSPICTRL_CS_SHIFT;
else if (cpu_is_mx35())
else if (cpu_is_mx25() || cpu_is_mx35())
reg |= (config->cs + 32) << MX35_CSPICTRL_CS_SHIFT;
}
......@@ -481,7 +484,7 @@ static void spi_imx_cleanup(struct spi_device *spi)
{
}
static int __init spi_imx_probe(struct platform_device *pdev)
static int __devinit spi_imx_probe(struct platform_device *pdev)
{
struct spi_imx_master *mxc_platform_info;
struct spi_master *master;
......@@ -489,7 +492,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
struct resource *res;
int i, ret;
mxc_platform_info = (struct spi_imx_master *)pdev->dev.platform_data;
mxc_platform_info = dev_get_platdata(&pdev->dev);
if (!mxc_platform_info) {
dev_err(&pdev->dev, "can't get the platform data\n");
return -EINVAL;
......@@ -513,11 +516,12 @@ static int __init spi_imx_probe(struct platform_device *pdev)
continue;
ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME);
if (ret) {
i--;
while (i > 0)
while (i > 0) {
i--;
if (spi_imx->chipselect[i] >= 0)
gpio_free(spi_imx->chipselect[i--]);
dev_err(&pdev->dev, "can't get cs gpios");
gpio_free(spi_imx->chipselect[i]);
}
dev_err(&pdev->dev, "can't get cs gpios\n");
goto out_master_put;
}
}
......@@ -551,7 +555,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
}
spi_imx->irq = platform_get_irq(pdev, 0);
if (!spi_imx->irq) {
if (spi_imx->irq <= 0) {
ret = -EINVAL;
goto out_iounmap;
}
......@@ -562,7 +566,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
goto out_iounmap;
}
if (cpu_is_mx31() || cpu_is_mx35()) {
if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35()) {
spi_imx->intctrl = mx31_intctrl;
spi_imx->config = mx31_config;
spi_imx->trigger = mx31_trigger;
......@@ -590,9 +594,14 @@ static int __init spi_imx_probe(struct platform_device *pdev)
clk_enable(spi_imx->clk);
spi_imx->spi_clk = clk_get_rate(spi_imx->clk);
if (!cpu_is_mx31() || !cpu_is_mx35())
if (cpu_is_mx1() || cpu_is_mx21() || cpu_is_mx27())
writel(1, spi_imx->base + MXC_RESET);
/* drain receive buffer */
if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35())
while (readl(spi_imx->base + MX3_CSPISTAT) & MX3_CSPISTAT_RR)
readl(spi_imx->base + MXC_CSPIRXDATA);
spi_imx->intctrl(spi_imx, 0);
ret = spi_bitbang_start(&spi_imx->bitbang);
......@@ -625,7 +634,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
return ret;
}
static int __exit spi_imx_remove(struct platform_device *pdev)
static int __devexit spi_imx_remove(struct platform_device *pdev)
{
struct spi_master *master = platform_get_drvdata(pdev);
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
......@@ -659,7 +668,7 @@ static struct platform_driver spi_imx_driver = {
.owner = THIS_MODULE,
},
.probe = spi_imx_probe,
.remove = __exit_p(spi_imx_remove),
.remove = __devexit_p(spi_imx_remove),
};
static int __init spi_imx_init(void)
......
......@@ -1356,7 +1356,7 @@ static int __devexit plat_mpc8xxx_spi_remove(struct platform_device *pdev)
MODULE_ALIAS("platform:mpc8xxx_spi");
static struct platform_driver mpc8xxx_spi_driver = {
.probe = plat_mpc8xxx_spi_probe,
.remove = __exit_p(plat_mpc8xxx_spi_remove),
.remove = __devexit_p(plat_mpc8xxx_spi_remove),
.driver = {
.name = "mpc8xxx_spi",
.owner = THIS_MODULE,
......
This diff is collapsed.
This diff is collapsed.
......@@ -266,15 +266,15 @@ static int spidev_message(struct spidev_data *spidev,
k_tmp->delay_usecs = u_tmp->delay_usecs;
k_tmp->speed_hz = u_tmp->speed_hz;
#ifdef VERBOSE
dev_dbg(&spi->dev,
dev_dbg(&spidev->spi->dev,
" xfer len %zd %s%s%s%dbits %u usec %uHz\n",
u_tmp->len,
u_tmp->rx_buf ? "rx " : "",
u_tmp->tx_buf ? "tx " : "",
u_tmp->cs_change ? "cs " : "",
u_tmp->bits_per_word ? : spi->bits_per_word,
u_tmp->bits_per_word ? : spidev->spi->bits_per_word,
u_tmp->delay_usecs,
u_tmp->speed_hz ? : spi->max_speed_hz);
u_tmp->speed_hz ? : spidev->spi->max_speed_hz);
#endif
spi_message_add_tail(k_tmp, &msg);
}
......
This diff is collapsed.
/*
* Xilinx SPI device driver API and platform data header file
*
* Copyright (c) 2009 Intel Corporation
*
* 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 _XILINX_SPI_H_
#define _XILINX_SPI_H_
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
#define XILINX_SPI_NAME "xilinx_spi"
struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
u32 irq, s16 bus_num);
void xilinx_spi_deinit(struct spi_master *master);
#endif
/*
* Xilinx SPI OF device driver
*
* Copyright (c) 2009 Intel Corporation
*
* 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.
*/
/* Supports:
* Xilinx SPI devices as OF devices
*
* Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <linux/of_spi.h>
#include <linux/spi/xilinx_spi.h>
#include "xilinx_spi.h"
static int __devinit xilinx_spi_of_probe(struct of_device *ofdev,
const struct of_device_id *match)
{
struct spi_master *master;
struct xspi_platform_data *pdata;
struct resource r_mem;
struct resource r_irq;
int rc = 0;
const u32 *prop;
int len;
rc = of_address_to_resource(ofdev->node, 0, &r_mem);
if (rc) {
dev_warn(&ofdev->dev, "invalid address\n");
return rc;
}
rc = of_irq_to_resource(ofdev->node, 0, &r_irq);
if (rc == NO_IRQ) {
dev_warn(&ofdev->dev, "no IRQ found\n");
return -ENODEV;
}
ofdev->dev.platform_data =
kzalloc(sizeof(struct xspi_platform_data), GFP_KERNEL);
pdata = ofdev->dev.platform_data;
if (!pdata)
return -ENOMEM;
/* number of slave select bits is required */
prop = of_get_property(ofdev->node, "xlnx,num-ss-bits", &len);
if (!prop || len < sizeof(*prop)) {
dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n");
return -EINVAL;
}
pdata->num_chipselect = *prop;
pdata->bits_per_word = 8;
master = xilinx_spi_init(&ofdev->dev, &r_mem, r_irq.start, -1);
if (!master)
return -ENODEV;
dev_set_drvdata(&ofdev->dev, master);
/* Add any subnodes on the SPI bus */
of_register_spi_devices(master, ofdev->node);
return 0;
}
static int __devexit xilinx_spi_remove(struct of_device *ofdev)
{
xilinx_spi_deinit(dev_get_drvdata(&ofdev->dev));
dev_set_drvdata(&ofdev->dev, 0);
kfree(ofdev->dev.platform_data);
ofdev->dev.platform_data = NULL;
return 0;
}
static int __exit xilinx_spi_of_remove(struct of_device *op)
{
return xilinx_spi_remove(op);
}
static struct of_device_id xilinx_spi_of_match[] = {
{ .compatible = "xlnx,xps-spi-2.00.a", },
{ .compatible = "xlnx,xps-spi-2.00.b", },
{}
};
MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
static struct of_platform_driver xilinx_spi_of_driver = {
.match_table = xilinx_spi_of_match,
.probe = xilinx_spi_of_probe,
.remove = __exit_p(xilinx_spi_of_remove),
.driver = {
.name = "xilinx-xps-spi",
.owner = THIS_MODULE,
},
};
static int __init xilinx_spi_of_init(void)
{
return of_register_platform_driver(&xilinx_spi_of_driver);
}
module_init(xilinx_spi_of_init);
static void __exit xilinx_spi_of_exit(void)
{
of_unregister_platform_driver(&xilinx_spi_of_driver);
}
module_exit(xilinx_spi_of_exit);
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
MODULE_DESCRIPTION("Xilinx SPI platform driver");
MODULE_LICENSE("GPL v2");
/*
* Support for Xilinx SPI platform devices
* Copyright (c) 2009 Intel Corporation
*
* 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.
*/
/* Supports:
* Xilinx SPI devices as platform devices
*
* Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
#include <linux/spi/xilinx_spi.h>
#include "xilinx_spi.h"
static int __devinit xilinx_spi_probe(struct platform_device *dev)
{
struct xspi_platform_data *pdata;
struct resource *r;
int irq;
struct spi_master *master;
u8 i;
pdata = dev->dev.platform_data;
if (!pdata)
return -ENODEV;
r = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!r)
return -ENODEV;
irq = platform_get_irq(dev, 0);
if (irq < 0)
return -ENXIO;
master = xilinx_spi_init(&dev->dev, r, irq, dev->id);
if (!master)
return -ENODEV;
for (i = 0; i < pdata->num_devices; i++)
spi_new_device(master, pdata->devices + i);
platform_set_drvdata(dev, master);
return 0;
}
static int __devexit xilinx_spi_remove(struct platform_device *dev)
{
xilinx_spi_deinit(platform_get_drvdata(dev));
platform_set_drvdata(dev, 0);
return 0;
}
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:" XILINX_SPI_NAME);
static struct platform_driver xilinx_spi_driver = {
.probe = xilinx_spi_probe,
.remove = __devexit_p(xilinx_spi_remove),
.driver = {
.name = XILINX_SPI_NAME,
.owner = THIS_MODULE,
},
};
static int __init xilinx_spi_pltfm_init(void)
{
return platform_driver_register(&xilinx_spi_driver);
}
module_init(xilinx_spi_pltfm_init);
static void __exit xilinx_spi_pltfm_exit(void)
{
platform_driver_unregister(&xilinx_spi_driver);
}
module_exit(xilinx_spi_pltfm_exit);
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
MODULE_DESCRIPTION("Xilinx SPI platform driver");
MODULE_LICENSE("GPL v2");
#ifndef INCLUDE_MPC5200_SPI_H
#define INCLUDE_MPC5200_SPI_H
extern void mpc52xx_spi_set_premessage_hook(struct spi_master *master,
void (*hook)(struct spi_message *m,
void *context),
void *hook_context);
#endif
#ifndef __SPI_SH_MSIOF_H__
#define __SPI_SH_MSIOF_H__
struct sh_msiof_spi_info {
int tx_fifo_override;
int rx_fifo_override;
u16 num_chipselect;
};
#endif /* __SPI_SH_MSIOF_H__ */
#ifndef __LINUX_SPI_XILINX_SPI_H
#define __LINUX_SPI_XILINX_SPI_H
/**
* struct xspi_platform_data - Platform data of the Xilinx SPI driver
* @num_chipselect: Number of chip select by the IP.
* @little_endian: If registers should be accessed little endian or not.
* @bits_per_word: Number of bits per word.
* @devices: Devices to add when the driver is probed.
* @num_devices: Number of devices in the devices array.
*/
struct xspi_platform_data {
u16 num_chipselect;
bool little_endian;
u8 bits_per_word;
struct spi_board_info *devices;
u8 num_devices;
};
#endif /* __LINUX_SPI_XILINX_SPI_H */
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