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Merge commit 'gcl/next' into next

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This commit is contained in:
Benjamin Herrenschmidt
2009-12-09 17:10:22 +11:00
parent 51badebdcf 6d5355998a
commit 8c82da5e24
17 changed files with 1609 additions and 320 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/powerpc/dts-bindings/fsl/mpc5200.txt
+16 -1
View File
@@ -103,7 +103,22 @@ fsl,mpc5200-gpt nodes
---------------------
On the mpc5200 and 5200b, GPT0 has a watchdog timer function. If the board
design supports the internal wdt, then the device node for GPT0 should
include the empty property 'fsl,has-wdt'.
include the empty property 'fsl,has-wdt'. Note that this does not activate
the watchdog. The timer will function as a GPT if the timer api is used, and
it will function as watchdog if the watchdog device is used. The watchdog
mode has priority over the gpt mode, i.e. if the watchdog is activated, any
gpt api call to this timer will fail with -EBUSY.
If you add the property
fsl,wdt-on-boot = <n>;
GPT0 will be marked as in-use watchdog, i.e. blocking every gpt access to it.
If n>0, the watchdog is started with a timeout of n seconds. If n=0, the
configuration of the watchdog is not touched. This is useful in two cases:
- just mark GPT0 as watchdog, blocking gpt accesses, and configure it later;
- do not touch a configuration assigned by the boot loader which supervises
the boot process itself.
The watchdog will respect the CONFIG_WATCHDOG_NOWAYOUT option.
An mpc5200-gpt can be used as a single line GPIO controller. To do so,
add the following properties to the gpt node:
arch/powerpc/include/asm/mpc52xx.h
+47
View File
@@ -276,6 +276,53 @@ extern int mpc52xx_set_psc_clkdiv(int psc_id, int clkdiv);
extern unsigned int mpc52xx_get_xtal_freq(struct device_node *node);
extern void mpc52xx_restart(char *cmd);
/* mpc52xx_gpt.c */
struct mpc52xx_gpt_priv;
extern struct mpc52xx_gpt_priv *mpc52xx_gpt_from_irq(int irq);
extern int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, u64 period,
int continuous);
extern u64 mpc52xx_gpt_timer_period(struct mpc52xx_gpt_priv *gpt);
extern int mpc52xx_gpt_stop_timer(struct mpc52xx_gpt_priv *gpt);
/* mpc52xx_lpbfifo.c */
#define MPC52XX_LPBFIFO_FLAG_READ (0)
#define MPC52XX_LPBFIFO_FLAG_WRITE (1<<0)
#define MPC52XX_LPBFIFO_FLAG_NO_INCREMENT (1<<1)
#define MPC52XX_LPBFIFO_FLAG_NO_DMA (1<<2)
#define MPC52XX_LPBFIFO_FLAG_POLL_DMA (1<<3)
struct mpc52xx_lpbfifo_request {
struct list_head list;
/* localplus bus address */
unsigned int cs;
size_t offset;
/* Memory address */
void *data;
phys_addr_t data_phys;
/* Details of transfer */
size_t size;
size_t pos; /* current position of transfer */
int flags;
/* What to do when finished */
void (*callback)(struct mpc52xx_lpbfifo_request *);
void *priv; /* Driver private data */
/* statistics */
int irq_count;
int irq_ticks;
u8 last_byte;
int buffer_not_done_cnt;
};
extern int mpc52xx_lpbfifo_submit(struct mpc52xx_lpbfifo_request *req);
extern void mpc52xx_lpbfifo_abort(struct mpc52xx_lpbfifo_request *req);
extern void mpc52xx_lpbfifo_poll(void);
/* mpc52xx_pic.c */
extern void mpc52xx_init_irq(void);
extern unsigned int mpc52xx_get_irq(void);
arch/powerpc/kernel/io.c
+2 -2
View File
@@ -161,7 +161,7 @@ void _memcpy_fromio(void *dest, const volatile void __iomem *src,
dest++;
n--;
}
while(n > 4) {
while(n >= 4) {
*((u32 *)dest) = *((volatile u32 *)vsrc);
eieio();
vsrc += 4;
@@ -190,7 +190,7 @@ void _memcpy_toio(volatile void __iomem *dest, const void *src, unsigned long n)
vdest++;
n--;
}
while(n > 4) {
while(n >= 4) {
*((volatile u32 *)vdest) = *((volatile u32 *)src);
src += 4;
vdest += 4;
arch/powerpc/platforms/52xx/Kconfig
+5
View File
@@ -62,3 +62,8 @@ config PPC_MPC5200_GPIO
select GENERIC_GPIO
help
Enable gpiolib support for mpc5200 based boards
config PPC_MPC5200_LPBFIFO
tristate "MPC5200 LocalPlus bus FIFO driver"
depends on PPC_MPC52xx
select PPC_BESTCOMM_GEN_BD
arch/powerpc/platforms/52xx/Makefile
+1
View File
@@ -15,3 +15,4 @@ ifeq ($(CONFIG_PPC_LITE5200),y)
endif
obj-$(CONFIG_PPC_MPC5200_GPIO) += mpc52xx_gpio.o
obj-$(CONFIG_PPC_MPC5200_LPBFIFO) += mpc52xx_lpbfifo.o
arch/powerpc/platforms/52xx/mpc52xx_gpt.c
+415 -13
View File
File diff suppressed because it is too large Load Diff
arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c
+560
View File
File diff suppressed because it is too large Load Diff
drivers/mmc/host/of_mmc_spi.c
+2
View File
@@ -22,6 +22,8 @@
#include <linux/mmc/core.h>
#include <linux/mmc/host.h>
MODULE_LICENSE("GPL");
enum {
CD_GPIO = 0,
WP_GPIO,
drivers/spi/Kconfig
+8
View File
@@ -133,6 +133,14 @@ config SPI_LM70_LLP
which interfaces to an LM70 temperature sensor using
a parallel port.
config SPI_MPC52xx
tristate "Freescale MPC52xx SPI (non-PSC) controller support"
depends on PPC_MPC52xx && SPI
select SPI_MASTER_OF
help
This drivers supports the MPC52xx SPI controller in master SPI
mode.
config SPI_MPC52xx_PSC
tristate "Freescale MPC52xx PSC SPI controller"
depends on PPC_MPC52xx && EXPERIMENTAL
drivers/spi/Makefile
+1
View File
@@ -25,6 +25,7 @@ obj-$(CONFIG_SPI_OMAP24XX) += omap2_mcspi.o
obj-$(CONFIG_SPI_ORION) += orion_spi.o
obj-$(CONFIG_SPI_PL022) += amba-pl022.o
obj-$(CONFIG_SPI_MPC52xx_PSC) += mpc52xx_psc_spi.o
obj-$(CONFIG_SPI_MPC52xx) += mpc52xx_spi.o
obj-$(CONFIG_SPI_MPC8xxx) += spi_mpc8xxx.o
obj-$(CONFIG_SPI_PPC4xx) += spi_ppc4xx.o
obj-$(CONFIG_SPI_S3C24XX_GPIO) += spi_s3c24xx_gpio.o
drivers/spi/mpc52xx_psc_spi.c
+17 -8
View File
@@ -17,6 +17,7 @@
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/of_platform.h>
#include <linux/of_spi.h>
#include <linux/workqueue.h>
#include <linux/completion.h>
#include <linux/io.h>
@@ -313,11 +314,13 @@ static int mpc52xx_psc_spi_port_config(int psc_id, struct mpc52xx_psc_spi *mps)
struct mpc52xx_psc __iomem *psc = mps->psc;
struct mpc52xx_psc_fifo __iomem *fifo = mps->fifo;
u32 mclken_div;
int ret = 0;
int ret;
/* default sysclk is 512MHz */
mclken_div = (mps->sysclk ? mps->sysclk : 512000000) / MCLK;
mpc52xx_set_psc_clkdiv(psc_id, mclken_div);
ret = mpc52xx_set_psc_clkdiv(psc_id, mclken_div);
if (ret)
return ret;
/* Reset the PSC into a known state */
out_8(&psc->command, MPC52xx_PSC_RST_RX);
@@ -341,7 +344,7 @@ static int mpc52xx_psc_spi_port_config(int psc_id, struct mpc52xx_psc_spi *mps)
mps->bits_per_word = 8;
return ret;
return 0;
}
static irqreturn_t mpc52xx_psc_spi_isr(int irq, void *dev_id)
@@ -410,8 +413,10 @@ static int __init mpc52xx_psc_spi_do_probe(struct device *dev, u32 regaddr,
goto free_master;
ret = mpc52xx_psc_spi_port_config(master->bus_num, mps);
if (ret < 0)
if (ret < 0) {
dev_err(dev, "can't configure PSC! Is it capable of SPI?\n");
goto free_irq;
}
spin_lock_init(&mps->lock);
init_completion(&mps->done);
@@ -464,10 +469,11 @@ static int __init mpc52xx_psc_spi_of_probe(struct of_device *op,
const u32 *regaddr_p;
u64 regaddr64, size64;
s16 id = -1;
int rc;
regaddr_p = of_get_address(op->node, 0, &size64, NULL);
if (!regaddr_p) {
printk(KERN_ERR "Invalid PSC address\n");
dev_err(&op->dev, "Invalid PSC address\n");
return -EINVAL;
}
regaddr64 = of_translate_address(op->node, regaddr_p);
@@ -478,15 +484,18 @@ static int __init mpc52xx_psc_spi_of_probe(struct of_device *op,
psc_nump = of_get_property(op->node, "cell-index", NULL);
if (!psc_nump || *psc_nump > 5) {
printk(KERN_ERR "mpc52xx_psc_spi: Device node %s has invalid "
"cell-index property\n", op->node->full_name);
dev_err(&op->dev, "Invalid cell-index property\n");
return -EINVAL;
}
id = *psc_nump + 1;
}
return mpc52xx_psc_spi_do_probe(&op->dev, (u32)regaddr64, (u32)size64,
rc = mpc52xx_psc_spi_do_probe(&op->dev, (u32)regaddr64, (u32)size64,
irq_of_parse_and_map(op->node, 0), id);
if (rc == 0)
of_register_spi_devices(dev_get_drvdata(&op->dev), op->node);
return rc;
}
static int __exit mpc52xx_psc_spi_of_remove(struct of_device *op)
drivers/spi/mpc52xx_spi.c
+520
View File
File diff suppressed because it is too large Load Diff
drivers/spi/xilinx_spi.c
+2 -1
View File
@@ -148,7 +148,8 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi,
{
u8 bits_per_word;
bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word;
bits_per_word = (t && t->bits_per_word)
? t->bits_per_word : spi->bits_per_word;
if (bits_per_word != 8) {
dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
__func__, bits_per_word);
drivers/watchdog/Kconfig
+3 -1
View File
@@ -861,8 +861,10 @@ config GEF_WDT
Watchdog timer found in a number of GE Fanuc single board computers.
config MPC5200_WDT
tristate "MPC5200 Watchdog Timer"
bool "MPC52xx Watchdog Timer"
depends on PPC_MPC52xx
help
Use General Purpose Timer (GPT) 0 on the MPC5200 as Watchdog.
config 8xxx_WDT
tristate "MPC8xxx Platform Watchdog Timer"
drivers/watchdog/Makefile
-1
View File
@@ -118,7 +118,6 @@ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
# POWERPC Architecture
obj-$(CONFIG_GEF_WDT) += gef_wdt.o
obj-$(CONFIG_MPC5200_WDT) += mpc5200_wdt.o
obj-$(CONFIG_8xxx_WDT) += mpc8xxx_wdt.o
obj-$(CONFIG_MV64X60_WDT) += mv64x60_wdt.o
obj-$(CONFIG_PIKA_WDT) += pika_wdt.o
drivers/watchdog/mpc5200_wdt.c
-293
View File
@@ -1,293 +0,0 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/of_platform.h>
#include <linux/uaccess.h>
#include <asm/mpc52xx.h>
#define GPT_MODE_WDT (1 << 15)
#define GPT_MODE_CE (1 << 12)
#define GPT_MODE_MS_TIMER (0x4)
struct mpc5200_wdt {
unsigned count; /* timer ticks before watchdog kicks in */
long ipb_freq;
struct miscdevice miscdev;
struct resource mem;
struct mpc52xx_gpt __iomem *regs;
spinlock_t io_lock;
};
/* is_active stores wether or not the /dev/watchdog device is opened */
static unsigned long is_active;
/* misc devices don't provide a way, to get back to 'dev' or 'miscdev' from
* file operations, which sucks. But there can be max 1 watchdog anyway, so...
*/
static struct mpc5200_wdt *wdt_global;
/* helper to calculate timeout in timer counts */
static void mpc5200_wdt_set_timeout(struct mpc5200_wdt *wdt, int timeout)
{
/* use biggest prescaler of 64k */
wdt->count = (wdt->ipb_freq + 0xffff) / 0x10000 * timeout;
if (wdt->count > 0xffff)
wdt->count = 0xffff;
}
/* return timeout in seconds (calculated from timer count) */
static int mpc5200_wdt_get_timeout(struct mpc5200_wdt *wdt)
{
return wdt->count * 0x10000 / wdt->ipb_freq;
}
/* watchdog operations */
static int mpc5200_wdt_start(struct mpc5200_wdt *wdt)
{
spin_lock(&wdt->io_lock);
/* disable */
out_be32(&wdt->regs->mode, 0);
/* set timeout, with maximum prescaler */
out_be32(&wdt->regs->count, 0x0 | wdt->count);
/* enable watchdog */
out_be32(&wdt->regs->mode, GPT_MODE_CE | GPT_MODE_WDT |
GPT_MODE_MS_TIMER);
spin_unlock(&wdt->io_lock);
return 0;
}
static int mpc5200_wdt_ping(struct mpc5200_wdt *wdt)
{
spin_lock(&wdt->io_lock);
/* writing A5 to OCPW resets the watchdog */
out_be32(&wdt->regs->mode, 0xA5000000 |
(0xffffff & in_be32(&wdt->regs->mode)));
spin_unlock(&wdt->io_lock);
return 0;
}
static int mpc5200_wdt_stop(struct mpc5200_wdt *wdt)
{
spin_lock(&wdt->io_lock);
/* disable */
out_be32(&wdt->regs->mode, 0);
spin_unlock(&wdt->io_lock);
return 0;
}
/* file operations */
static ssize_t mpc5200_wdt_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
struct mpc5200_wdt *wdt = file->private_data;
mpc5200_wdt_ping(wdt);
return 0;
}
static struct watchdog_info mpc5200_wdt_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
.identity = "mpc5200 watchdog on GPT0",
};
static long mpc5200_wdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct mpc5200_wdt *wdt = file->private_data;
int __user *data = (int __user *)arg;
int timeout;
int ret = 0;
switch (cmd) {
case WDIOC_GETSUPPORT:
ret = copy_to_user(data, &mpc5200_wdt_info,
sizeof(mpc5200_wdt_info));
if (ret)
ret = -EFAULT;
break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
ret = put_user(0, data);
break;
case WDIOC_KEEPALIVE:
mpc5200_wdt_ping(wdt);
break;
case WDIOC_SETTIMEOUT:
ret = get_user(timeout, data);
if (ret)
break;
mpc5200_wdt_set_timeout(wdt, timeout);
mpc5200_wdt_start(wdt);
/* fall through and return the timeout */
case WDIOC_GETTIMEOUT:
timeout = mpc5200_wdt_get_timeout(wdt);
ret = put_user(timeout, data);
break;
default:
ret = -ENOTTY;
}
return ret;
}
static int mpc5200_wdt_open(struct inode *inode, struct file *file)
{
/* /dev/watchdog can only be opened once */
if (test_and_set_bit(0, &is_active))
return -EBUSY;
/* Set and activate the watchdog */
mpc5200_wdt_set_timeout(wdt_global, 30);
mpc5200_wdt_start(wdt_global);
file->private_data = wdt_global;
return nonseekable_open(inode, file);
}
static int mpc5200_wdt_release(struct inode *inode, struct file *file)
{
#if WATCHDOG_NOWAYOUT == 0
struct mpc5200_wdt *wdt = file->private_data;
mpc5200_wdt_stop(wdt);
wdt->count = 0; /* == disabled */
#endif
clear_bit(0, &is_active);
return 0;
}
static const struct file_operations mpc5200_wdt_fops = {
.owner = THIS_MODULE,
.write = mpc5200_wdt_write,
.unlocked_ioctl = mpc5200_wdt_ioctl,
.open = mpc5200_wdt_open,
.release = mpc5200_wdt_release,
};
/* module operations */
static int mpc5200_wdt_probe(struct of_device *op,
const struct of_device_id *match)
{
struct mpc5200_wdt *wdt;
int err;
const void *has_wdt;
int size;
has_wdt = of_get_property(op->node, "has-wdt", NULL);
if (!has_wdt)
has_wdt = of_get_property(op->node, "fsl,has-wdt", NULL);
if (!has_wdt)
return -ENODEV;
wdt = kzalloc(sizeof(*wdt), GFP_KERNEL);
if (!wdt)
return -ENOMEM;
wdt->ipb_freq = mpc5xxx_get_bus_frequency(op->node);
err = of_address_to_resource(op->node, 0, &wdt->mem);
if (err)
goto out_free;
size = wdt->mem.end - wdt->mem.start + 1;
if (!request_mem_region(wdt->mem.start, size, "mpc5200_wdt")) {
err = -ENODEV;
goto out_free;
}
wdt->regs = ioremap(wdt->mem.start, size);
if (!wdt->regs) {
err = -ENODEV;
goto out_release;
}
dev_set_drvdata(&op->dev, wdt);
spin_lock_init(&wdt->io_lock);
wdt->miscdev = (struct miscdevice) {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &mpc5200_wdt_fops,
.parent = &op->dev,
};
wdt_global = wdt;
err = misc_register(&wdt->miscdev);
if (!err)
return 0;
iounmap(wdt->regs);
out_release:
release_mem_region(wdt->mem.start, size);
out_free:
kfree(wdt);
return err;
}
static int mpc5200_wdt_remove(struct of_device *op)
{
struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
mpc5200_wdt_stop(wdt);
misc_deregister(&wdt->miscdev);
iounmap(wdt->regs);
release_mem_region(wdt->mem.start, wdt->mem.end - wdt->mem.start + 1);
kfree(wdt);
return 0;
}
static int mpc5200_wdt_suspend(struct of_device *op, pm_message_t state)
{
struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
mpc5200_wdt_stop(wdt);
return 0;
}
static int mpc5200_wdt_resume(struct of_device *op)
{
struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
if (wdt->count)
mpc5200_wdt_start(wdt);
return 0;
}
static int mpc5200_wdt_shutdown(struct of_device *op)
{
struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
mpc5200_wdt_stop(wdt);
return 0;
}
static struct of_device_id mpc5200_wdt_match[] = {
{ .compatible = "mpc5200-gpt", },
{ .compatible = "fsl,mpc5200-gpt", },
{},
};
static struct of_platform_driver mpc5200_wdt_driver = {
.owner = THIS_MODULE,
.name = "mpc5200-gpt-wdt",
.match_table = mpc5200_wdt_match,
.probe = mpc5200_wdt_probe,
.remove = mpc5200_wdt_remove,
.suspend = mpc5200_wdt_suspend,
.resume = mpc5200_wdt_resume,
.shutdown = mpc5200_wdt_shutdown,
};
static int __init mpc5200_wdt_init(void)
{
return of_register_platform_driver(&mpc5200_wdt_driver);
}
static void __exit mpc5200_wdt_exit(void)
{
of_unregister_platform_driver(&mpc5200_wdt_driver);
}
module_init(mpc5200_wdt_init);
module_exit(mpc5200_wdt_exit);
MODULE_AUTHOR("Domen Puncer <domen.puncer@telargo.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
include/linux/spi/mpc52xx_spi.h
+10
View File
@@ -0,0 +1,10 @@
#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