mv643xx_eth: get rid of static variables, allow multiple instances

Move mv643xx_eth's static state (ethernet register block base address
and MII management interface spinlock) into a struct hanging off the
shared platform device.  This is necessary to support chips that
contain multiple mv643xx_eth silicon blocks.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>

1 files changed, 45 insertions, 17 deletions

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 381b36e5f64c..eebf0d288e36 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -507,7 +507,15 @@ struct mv643xx_mib_counters {
         u32 late_collision;
 };
 
+struct mv643xx_shared_private {
+        void __iomem *eth_base;
+
+        /* used to protect SMI_REG, which is shared across ports */
+        spinlock_t phy_lock;
+};
+
 struct mv643xx_private {
+        struct mv643xx_shared_private *shared;
         int port_num;                   /* User Ethernet port number    */
 
         u32 rx_sram_addr;               /* Base address of rx sram area */
@@ -614,19 +622,14 @@ static const struct ethtool_ops mv643xx_ethtool_ops;
 static char mv643xx_driver_name[] = "mv643xx_eth";
 static char mv643xx_driver_version[] = "1.0";
 
-static void __iomem *mv643xx_eth_base;
-
-/* used to protect SMI_REG, which is shared across ports */
-static DEFINE_SPINLOCK(mv643xx_eth_phy_lock);
-
 static inline u32 rdl(struct mv643xx_private *mp, int offset)
 {
-        return readl(mv643xx_eth_base + offset);
+        return readl(mp->shared->eth_base + offset);
 }
 
 static inline void wrl(struct mv643xx_private *mp, int offset, u32 data)
 {
-        writel(data, mv643xx_eth_base + offset);
+        writel(data, mp->shared->eth_base + offset);
 }
 
 /*
@@ -1827,6 +1830,11 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
                 return -ENODEV;
         }
 
+        if (pd->shared == NULL) {
+                printk(KERN_ERR "No mv643xx_eth_platform_data->shared\n");
+                return -ENODEV;
+        }
+
         dev = alloc_etherdev(sizeof(struct mv643xx_private));
         if (!dev)
                 return -ENOMEM;
@@ -1877,6 +1885,7 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
 
         spin_lock_init(&mp->lock);
 
+        mp->shared = platform_get_drvdata(pd->shared);
         port_num = mp->port_num = pd->port_number;
 
         /* set default config values */
@@ -1986,27 +1995,46 @@ static int mv643xx_eth_remove(struct platform_device *pdev)
 static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 {
         static int mv643xx_version_printed = 0;
+        struct mv643xx_shared_private *msp;
         struct resource *res;
+        int ret;
 
         if (!mv643xx_version_printed++)
                 printk(KERN_NOTICE "MV-643xx 10/100/1000 Ethernet Driver\n");
 
+        ret = -EINVAL;
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (res == NULL)
-                return -ENODEV;
+                goto out;
 
-        mv643xx_eth_base = ioremap(res->start, res->end - res->start + 1);
-        if (mv643xx_eth_base == NULL)
-                return -ENOMEM;
+        ret = -ENOMEM;
+        msp = kmalloc(sizeof(*msp), GFP_KERNEL);
+        if (msp == NULL)
+                goto out;
+        memset(msp, 0, sizeof(*msp));
+
+        msp->eth_base = ioremap(res->start, res->end - res->start + 1);
+        if (msp->eth_base == NULL)
+                goto out_free;
+
+        spin_lock_init(&msp->phy_lock);
+
+        platform_set_drvdata(pdev, msp);
 
         return 0;
 
+out_free:
+        kfree(msp);
+out:
+        return ret;
 }
 
 static int mv643xx_eth_shared_remove(struct platform_device *pdev)
 {
-        iounmap(mv643xx_eth_base);
-        mv643xx_eth_base = NULL;
+        struct mv643xx_shared_private *msp = platform_get_drvdata(pdev);
+
+        iounmap(msp->eth_base);
+        kfree(msp);
 
         return 0;
 }
@@ -2911,7 +2939,7 @@ static void eth_port_read_smi_reg(struct mv643xx_private *mp,
         int i;
 
         /* the SMI register is a shared resource */
-        spin_lock_irqsave(&mv643xx_eth_phy_lock, flags);
+        spin_lock_irqsave(&mp->shared->phy_lock, flags);
 
         /* wait for the SMI register to become available */
         for (i = 0; rdl(mp, SMI_REG) & ETH_SMI_BUSY; i++) {
@@ -2936,7 +2964,7 @@ static void eth_port_read_smi_reg(struct mv643xx_private *mp,
 
         *value = rdl(mp, SMI_REG) & 0xffff;
 out:
-        spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags);
+        spin_unlock_irqrestore(&mp->shared->phy_lock, flags);
 }
 
 /*
@@ -2969,7 +2997,7 @@ static void eth_port_write_smi_reg(struct mv643xx_private *mp,
         phy_addr = ethernet_phy_get(mp);
 
         /* the SMI register is a shared resource */
-        spin_lock_irqsave(&mv643xx_eth_phy_lock, flags);
+        spin_lock_irqsave(&mp->shared->phy_lock, flags);
 
         /* wait for the SMI register to become available */
         for (i = 0; rdl(mp, SMI_REG) & ETH_SMI_BUSY; i++) {
@@ -2983,7 +3011,7 @@ static void eth_port_write_smi_reg(struct mv643xx_private *mp,
         wrl(mp, SMI_REG, (phy_addr << 16) | (phy_reg << 21) |
                                 ETH_SMI_OPCODE_WRITE | (value & 0xffff));
 out:
-        spin_unlock_irqrestore(&mv643xx_eth_phy_lock, flags);
+        spin_unlock_irqrestore(&mp->shared->phy_lock, flags);
 }
 
 /*