#undef DEBUG
#undef DEBUG_LOW
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/init.h>
#include <linux/completion.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
-#include <linux/completion.h>
#include <linux/timer.h>
+#include <linux/mutex.h>
#include <asm/keylargo.h>
#include <asm/uninorth.h>
#include <asm/io.h>
void *hostdata;
int channel; /* some hosts have multiple */
int mode; /* current mode */
- struct semaphore sem;
+ struct mutex mutex;
int opened;
int polled; /* open mode */
struct platform_device *platform_dev;
struct pmac_i2c_host_kw
{
- struct semaphore mutex; /* Access mutex for use by
+ struct mutex mutex; /* Access mutex for use by
* i2c-keywest */
void __iomem *base; /* register base address */
int bsteps; /* register stepping */
}
/* Interrupt handler */
-static irqreturn_t kw_i2c_irq(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t kw_i2c_irq(int irq, void *dev_id)
{
struct pmac_i2c_host_kw *host = dev_id;
unsigned long flags;
static int kw_i2c_open(struct pmac_i2c_bus *bus)
{
struct pmac_i2c_host_kw *host = bus->hostdata;
- down(&host->mutex);
+ mutex_lock(&host->mutex);
return 0;
}
static void kw_i2c_close(struct pmac_i2c_bus *bus)
{
struct pmac_i2c_host_kw *host = bus->hostdata;
- up(&host->mutex);
+ mutex_unlock(&host->mutex);
}
static int kw_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize,
static struct pmac_i2c_host_kw *__init kw_i2c_host_init(struct device_node *np)
{
struct pmac_i2c_host_kw *host;
- u32 *psteps, *prate, *addrp, steps;
+ const u32 *psteps, *prate, *addrp;
+ u32 steps;
host = kzalloc(sizeof(struct pmac_i2c_host_kw), GFP_KERNEL);
if (host == NULL) {
* on all i2c keywest nodes so far ... we would have to fallback
* to macio parsing if that wasn't the case
*/
- addrp = (u32 *)get_property(np, "AAPL,address", NULL);
+ addrp = of_get_property(np, "AAPL,address", NULL);
if (addrp == NULL) {
printk(KERN_ERR "low_i2c: Can't find address for %s\n",
np->full_name);
kfree(host);
return NULL;
}
- init_MUTEX(&host->mutex);
+ mutex_init(&host->mutex);
init_completion(&host->complete);
spin_lock_init(&host->lock);
init_timer(&host->timeout_timer);
host->timeout_timer.function = kw_i2c_timeout;
host->timeout_timer.data = (unsigned long)host;
- psteps = (u32 *)get_property(np, "AAPL,address-step", NULL);
+ psteps = of_get_property(np, "AAPL,address-step", NULL);
steps = psteps ? (*psteps) : 0x10;
for (host->bsteps = 0; (steps & 0x01) == 0; host->bsteps++)
steps >>= 1;
/* Select interface rate */
host->speed = KW_I2C_MODE_25KHZ;
- prate = (u32 *)get_property(np, "AAPL,i2c-rate", NULL);
+ prate = of_get_property(np, "AAPL,i2c-rate", NULL);
if (prate) switch(*prate) {
case 100:
host->speed = KW_I2C_MODE_100KHZ;
host->speed = KW_I2C_MODE_25KHZ;
break;
}
- if (np->n_intrs > 0)
- host->irq = np->intrs[0].line;
- else
- host->irq = NO_IRQ;
+ host->irq = irq_of_parse_and_map(np, 0);
+ if (host->irq == NO_IRQ)
+ printk(KERN_WARNING
+ "low_i2c: Failed to map interrupt for %s\n",
+ np->full_name);
host->base = ioremap((*addrp), 0x1000);
if (host->base == NULL) {
bus->open = kw_i2c_open;
bus->close = kw_i2c_close;
bus->xfer = kw_i2c_xfer;
- init_MUTEX(&bus->sem);
+ mutex_init(&bus->mutex);
if (controller == busnode)
bus->flags = pmac_i2c_multibus;
list_add(&bus->link, &pmac_i2c_busses);
} else {
for (child = NULL;
(child = of_get_next_child(np, child)) != NULL;) {
- u32 *reg =
- (u32 *)get_property(child, "reg", NULL);
+ const u32 *reg = of_get_property(child,
+ "reg", NULL);
if (reg == NULL)
continue;
kw_i2c_add(host, np, child, *reg);
bus->mode = pmac_i2c_mode_std;
bus->hostdata = bus + 1;
bus->xfer = pmu_i2c_xfer;
- init_MUTEX(&bus->sem);
+ mutex_init(&bus->mutex);
bus->flags = pmac_i2c_multibus;
list_add(&bus->link, &pmac_i2c_busses);
{
struct device_node *controller, *busnode;
struct pmac_i2c_bus *bus;
- u32 *reg;
+ const u32 *reg;
int sz;
if (!smu_present())
if (strcmp(busnode->type, "i2c") &&
strcmp(busnode->type, "i2c-bus"))
continue;
- reg = (u32 *)get_property(busnode, "reg", NULL);
+ reg = of_get_property(busnode, "reg", NULL);
if (reg == NULL)
continue;
bus->mode = pmac_i2c_mode_std;
bus->hostdata = bus + 1;
bus->xfer = smu_i2c_xfer;
- init_MUTEX(&bus->sem);
+ mutex_init(&bus->mutex);
bus->flags = 0;
list_add(&bus->link, &pmac_i2c_busses);
list_for_each_entry(bus, &pmac_i2c_busses, link) {
if (p == bus->busnode) {
if (prev && bus->flags & pmac_i2c_multibus) {
- u32 *reg;
- reg = (u32 *)get_property(prev, "reg",
- NULL);
+ const u32 *reg;
+ reg = of_get_property(prev, "reg",
+ NULL);
if (!reg)
continue;
if (((*reg) >> 8) != bus->channel)
u8 pmac_i2c_get_dev_addr(struct device_node *device)
{
- u32 *reg = (u32 *)get_property(device, "reg", NULL);
+ const u32 *reg = of_get_property(device, "reg", NULL);
if (reg == NULL)
return 0;
{
int rc;
- down(&bus->sem);
+ mutex_lock(&bus->mutex);
bus->polled = polled || pmac_i2c_force_poll;
bus->opened = 1;
bus->mode = pmac_i2c_mode_std;
if (bus->open && (rc = bus->open(bus)) != 0) {
bus->opened = 0;
- up(&bus->sem);
+ mutex_unlock(&bus->mutex);
return rc;
}
return 0;
if (bus->close)
bus->close(bus);
bus->opened = 0;
- up(&bus->sem);
+ mutex_unlock(&bus->mutex);
}
EXPORT_SYMBOL_GPL(pmac_i2c_close);
/* some quirks for platform function decoding */
enum {
pmac_i2c_quirk_invmask = 0x00000001u,
+ pmac_i2c_quirk_skip = 0x00000002u,
};
static void pmac_i2c_devscan(void (*callback)(struct device_node *dev,
/* XXX Study device-tree's & apple drivers are get the quirks
* right !
*/
+ /* Workaround: It seems that running the clockspreading
+ * properties on the eMac will cause lockups during boot.
+ * The machine seems to work fine without that. So for now,
+ * let's make sure i2c-hwclock doesn't match about "imic"
+ * clocks and we'll figure out if we really need to do
+ * something special about those later.
+ */
+ { "i2c-hwclock", "imic5002", pmac_i2c_quirk_skip },
+ { "i2c-hwclock", "imic5003", pmac_i2c_quirk_skip },
{ "i2c-hwclock", NULL, pmac_i2c_quirk_invmask },
{ "i2c-cpu-voltage", NULL, 0},
{ "temp-monitor", NULL, 0 },
if (strcmp(np->name, p->name))
continue;
if (p->compatible &&
- !device_is_compatible(np, p->compatible))
+ !of_device_is_compatible(np, p->compatible))
continue;
+ if (p->quirks & pmac_i2c_quirk_skip)
+ break;
callback(np, p->quirks);
break;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff