git://git.onelab.eu / linux-2.6.git / blobdiff
? search:
summary | shortlog | log | commit | commitdiff | tree
raw | inline | side by side
fedora core 6 1.2949 + vserver 2.2.0
[linux-2.6.git] / drivers / i2c / busses / i2c-ibm_iic.c
diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
index fcb5252..1898e99 100644 (file)
--- a/drivers/i2c/busses/i2c-ibm_iic.c
+++ b/drivers/i2c/busses/i2c-ibm_iic.c
@@ -1,5 +1,5 @@
 /*
- * drivers/i2c/i2c-ibm_iic.c
+ * drivers/i2c/busses/i2c-ibm_iic.c
  *
  * Support for the IIC peripheral on IBM PPC 4xx
  *
@@ -28,7 +28,6 @@
  *
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/ioport.h>
@@ -81,7 +80,7 @@ MODULE_PARM_DESC(iic_fast_poll, "Force fast mode (400 kHz)");
 #if DBG_LEVEL > 2
 static void dump_iic_regs(const char* header, struct ibm_iic_private* dev)
 {
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        printk(KERN_DEBUG "ibm-iic%d: %s\n", dev->idx, header);
        printk(KERN_DEBUG "  cntl     = 0x%02x, mdcntl = 0x%02x\n"
               KERN_DEBUG "  sts      = 0x%02x, extsts = 0x%02x\n"
@@ -132,7 +131,7 @@ static inline void iic_interrupt_mode(struct ibm_iic_private* dev, int enable)
  */
 static void iic_dev_init(struct ibm_iic_private* dev)
 {
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
 
        DBG("%d: init\n", dev->idx);
        
@@ -177,7 +176,7 @@ static void iic_dev_init(struct ibm_iic_private* dev)
  */
 static void iic_dev_reset(struct ibm_iic_private* dev)
 {
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        int i;
        u8 dc;
        
@@ -225,7 +224,7 @@ static void iic_dev_reset(struct ibm_iic_private* dev)
  */
 
 /* Wait for SCL and/or SDA to be high */
-static int iic_dc_wait(volatile struct iic_regs *iic, u8 mask)
+static int iic_dc_wait(volatile struct iic_regs __iomem *iic, u8 mask)
 {
        unsigned long x = jiffies + HZ / 28 + 2;
        while ((in_8(&iic->directcntl) & mask) != mask){
@@ -238,7 +237,7 @@ static int iic_dc_wait(volatile struct iic_regs *iic, u8 mask)
 
 static int iic_smbus_quick(struct ibm_iic_private* dev, const struct i2c_msg* p)
 {
-       volatile struct iic_regs* iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        const struct i2c_timings* t = &timings[dev->fast_mode ? 1 : 0];
        u8 mask, v, sda;
        int i, res;
@@ -321,10 +320,10 @@ err:
 /*
  * IIC interrupt handler
  */
-static irqreturn_t iic_handler(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t iic_handler(int irq, void *dev_id)
 {
        struct ibm_iic_private* dev = (struct ibm_iic_private*)dev_id;
-       volatile struct iic_regs* iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        
        DBG2("%d: irq handler, STS = 0x%02x, EXTSTS = 0x%02x\n", 
             dev->idx, in_8(&iic->sts), in_8(&iic->extsts));
@@ -342,7 +341,7 @@ static irqreturn_t iic_handler(int irq, void *dev_id, struct pt_regs *regs)
  */
 static int iic_xfer_result(struct ibm_iic_private* dev)
 {
-       volatile struct iic_regs *iic = dev->vaddr;     
+       volatile struct iic_regs __iomem *iic = dev->vaddr;     
        
        if (unlikely(in_8(&iic->sts) & STS_ERR)){
                DBG("%d: xfer error, EXTSTS = 0x%02x\n", dev->idx, 
@@ -375,7 +374,7 @@ static int iic_xfer_result(struct ibm_iic_private* dev)
  */
 static void iic_abort_xfer(struct ibm_iic_private* dev)
 {
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        unsigned long x;
        
        DBG("%d: iic_abort_xfer\n", dev->idx);
@@ -407,25 +406,17 @@ static void iic_abort_xfer(struct ibm_iic_private* dev)
  */
 static int iic_wait_for_tc(struct ibm_iic_private* dev){
        
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        int ret = 0;
        
        if (dev->irq >= 0){
                /* Interrupt mode */
-               wait_queue_t wait;
-               init_waitqueue_entry(&wait, current);
-               
-               add_wait_queue(&dev->wq, &wait);
-               set_current_state(TASK_INTERRUPTIBLE);
-               if (in_8(&iic->sts) & STS_PT)
-                       schedule_timeout(dev->adap.timeout * HZ);
-               set_current_state(TASK_RUNNING);
-               remove_wait_queue(&dev->wq, &wait);
-               
-               if (unlikely(signal_pending(current))){
+               ret = wait_event_interruptible_timeout(dev->wq, 
+                       !(in_8(&iic->sts) & STS_PT), dev->adap.timeout * HZ);
+
+               if (unlikely(ret < 0))
                        DBG("%d: wait interrupted\n", dev->idx);
-                       ret = -ERESTARTSYS;
-               } else if (unlikely(in_8(&iic->sts) & STS_PT)){
+               else if (unlikely(in_8(&iic->sts) & STS_PT)){
                        DBG("%d: wait timeout\n", dev->idx);
                        ret = -ETIMEDOUT;
                }
@@ -466,7 +457,7 @@ static int iic_wait_for_tc(struct ibm_iic_private* dev){
 static int iic_xfer_bytes(struct ibm_iic_private* dev, struct i2c_msg* pm, 
                          int combined_xfer)
 {
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        char* buf = pm->buf;
        int i, j, loops, ret = 0;
        int len = pm->len;
@@ -482,7 +473,7 @@ static int iic_xfer_bytes(struct ibm_iic_private* dev, struct i2c_msg* pm,
                
                if (!(cntl & CNTL_RW))
                        for (j = 0; j < count; ++j)
-                               out_8((volatile u8*)&iic->mdbuf, *buf++);
+                               out_8((void __iomem *)&iic->mdbuf, *buf++);
                
                if (i < loops - 1)
                        cmd |= CNTL_CHT;
@@ -513,7 +504,7 @@ static int iic_xfer_bytes(struct ibm_iic_private* dev, struct i2c_msg* pm,
                
                if (cntl & CNTL_RW)
                        for (j = 0; j < count; ++j)
-                               *buf++ = in_8((volatile u8*)&iic->mdbuf);
+                               *buf++ = in_8((void __iomem *)&iic->mdbuf);
        }
        
        return ret > 0 ? 0 : ret;
@@ -524,7 +515,7 @@ static int iic_xfer_bytes(struct ibm_iic_private* dev, struct i2c_msg* pm,
  */
 static inline void iic_address(struct ibm_iic_private* dev, struct i2c_msg* msg)
 {
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        u16 addr = msg->addr;
        
        DBG2("%d: iic_address, 0x%03x (%d-bit)\n", dev->idx, 
@@ -557,10 +548,10 @@ static inline int iic_address_neq(const struct i2c_msg* p1,
  * Generic master transfer entrypoint. 
  * Returns the number of processed messages or error (<0)
  */
-static int iic_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
+static int iic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 {
        struct ibm_iic_private* dev = (struct ibm_iic_private*)(i2c_get_adapdata(adap));
-       volatile struct iic_regs *iic = dev->vaddr;
+       volatile struct iic_regs __iomem *iic = dev->vaddr;
        int i, ret = 0;
        
        DBG2("%d: iic_xfer, %d msg(s)\n", dev->idx, num);
@@ -634,14 +625,8 @@ static u32 iic_func(struct i2c_adapter *adap)
        return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR;
 }
 
-static struct i2c_algorithm iic_algo = {
-       .name           = "IBM IIC algorithm",
-       .id             = I2C_ALGO_OCP,
+static const struct i2c_algorithm iic_algo = {
        .master_xfer    = iic_xfer,
-       .smbus_xfer     = NULL,
-       .slave_send     = NULL,
-       .slave_recv     = NULL,
-       .algo_control   = NULL,
        .functionality  = iic_func
 };
 
@@ -686,16 +671,21 @@ static int __devinit iic_probe(struct ocp_device *ocp){
                printk(KERN_WARNING"ibm-iic%d: missing additional data!\n",
                        ocp->def->index);
 
-       if (!(dev = kmalloc(sizeof(*dev), GFP_KERNEL))){
+       if (!(dev = kzalloc(sizeof(*dev), GFP_KERNEL))) {
                printk(KERN_CRIT "ibm-iic%d: failed to allocate device data\n",
                        ocp->def->index);
                return -ENOMEM;
        }
 
-       memset(dev, 0, sizeof(*dev));
        dev->idx = ocp->def->index;
        ocp_set_drvdata(ocp, dev);
        
+       if (!request_mem_region(ocp->def->paddr, sizeof(struct iic_regs),
+                               "ibm_iic")) {
+               ret = -EBUSY;
+               goto fail1;
+       }
+
        if (!(dev->vaddr = ioremap(ocp->def->paddr, sizeof(struct iic_regs)))){
                printk(KERN_CRIT "ibm-iic%d: failed to ioremap device registers\n",
                        dev->idx);
@@ -707,7 +697,7 @@ static int __devinit iic_probe(struct ocp_device *ocp){
 
        dev->irq = iic_force_poll ? -1 : ocp->def->irq;
        if (dev->irq >= 0){
-               /* Disable interrupts until we finish intialization,
+               /* Disable interrupts until we finish initialization,
                   assumes level-sensitive IRQ setup...
                 */
                iic_interrupt_mode(dev, 0);
@@ -739,7 +729,8 @@ static int __devinit iic_probe(struct ocp_device *ocp){
        adap = &dev->adap;
        strcpy(adap->name, "IBM IIC");
        i2c_set_adapdata(adap, dev);
-       adap->id = I2C_HW_OCP | iic_algo.id;
+       adap->id = I2C_HW_OCP;
+       adap->class = I2C_CLASS_HWMON;
        adap->algo = &iic_algo;
        adap->client_register = NULL;
        adap->client_unregister = NULL;
@@ -763,9 +754,11 @@ fail:
                free_irq(dev->irq, dev);
        }       
 
-       iounmap((void*)dev->vaddr);
+       iounmap(dev->vaddr);
 fail2: 
-       ocp_set_drvdata(ocp, 0);
+       release_mem_region(ocp->def->paddr, sizeof(struct iic_regs));
+fail1:
+       ocp_set_drvdata(ocp, NULL);
        kfree(dev);     
        return ret;
 }
@@ -791,7 +784,8 @@ static void __devexit iic_remove(struct ocp_device *ocp)
                    iic_interrupt_mode(dev, 0); 
                    free_irq(dev->irq, dev);
                }
-               iounmap((void*)dev->vaddr);
+               iounmap(dev->vaddr);
+               release_mem_region(ocp->def->paddr, sizeof(struct iic_regs));
                kfree(dev);
        }
 }
linux-2.6