smc91x: introduce platform data flags V2

This patch introduces struct smc91x_platdata and modifies the driver so
bus width is checked during run time using SMC_nBIT() instead of
SMC_CAN_USE_nBIT.

V2 keeps static configuration lean using SMC_DYNAMIC_BUS_CONFIG.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 77 insertions, 27 deletions

diff --git a/drivers/net/smc91x.c b/drivers/net/smc91x.c
index d0ef80ae018a..97bdb2a43bc8 100644
--- a/drivers/net/smc91x.c
+++ b/drivers/net/smc91x.c
@@ -1997,6 +1997,8 @@ err_out:
 
 static int smc_enable_device(struct platform_device *pdev)
 {
+        struct net_device *ndev = platform_get_drvdata(pdev);
+        struct smc_local *lp = netdev_priv(ndev);
         unsigned long flags;
         unsigned char ecor, ecsr;
         void __iomem *addr;
@@ -2039,7 +2041,7 @@ static int smc_enable_device(struct platform_device *pdev)
          * Set the appropriate byte/word mode.
          */
         ecsr = readb(addr + (ECSR << SMC_IO_SHIFT)) & ~ECSR_IOIS8;
-        if (!SMC_CAN_USE_16BIT)
+        if (!SMC_16BIT(lp))
                 ecsr |= ECSR_IOIS8;
         writeb(ecsr, addr + (ECSR << SMC_IO_SHIFT));
         local_irq_restore(flags);
@@ -2124,10 +2126,11 @@ static void smc_release_datacs(struct platform_device *pdev, struct net_device *
  */
 static int smc_drv_probe(struct platform_device *pdev)
 {
+        struct smc91x_platdata *pd = pdev->dev.platform_data;
+        struct smc_local *lp;
         struct net_device *ndev;
         struct resource *res, *ires;
         unsigned int __iomem *addr;
-        unsigned long irq_flags = SMC_IRQ_FLAGS;
         int ret;
 
         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "smc91x-regs");
@@ -2152,6 +2155,27 @@ static int smc_drv_probe(struct platform_device *pdev)
         }
         SET_NETDEV_DEV(ndev, &pdev->dev);
 
+        /* get configuration from platform data, only allow use of
+         * bus width if both SMC_CAN_USE_xxx and SMC91X_USE_xxx are set.
+         */
+
+        lp = netdev_priv(ndev);
+        lp->cfg.irq_flags = SMC_IRQ_FLAGS;
+
+#ifdef SMC_DYNAMIC_BUS_CONFIG
+        if (pd)
+                memcpy(&lp->cfg, pd, sizeof(lp->cfg));
+        else {
+                lp->cfg.flags = SMC91X_USE_8BIT;
+                lp->cfg.flags |= SMC91X_USE_16BIT;
+                lp->cfg.flags |= SMC91X_USE_32BIT;
+        }
+
+        lp->cfg.flags &= ~(SMC_CAN_USE_8BIT ? 0 : SMC91X_USE_8BIT);
+        lp->cfg.flags &= ~(SMC_CAN_USE_16BIT ? 0 : SMC91X_USE_16BIT);
+        lp->cfg.flags &= ~(SMC_CAN_USE_32BIT ? 0 : SMC91X_USE_32BIT);
+#endif
+
         ndev->dma = (unsigned char)-1;
 
         ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
@@ -2162,7 +2186,7 @@ static int smc_drv_probe(struct platform_device *pdev)
 
         ndev->irq = ires->start;
         if (SMC_IRQ_FLAGS == -1)
-                irq_flags = ires->flags & IRQF_TRIGGER_MASK;
+                lp->cfg.irq_flags = ires->flags & IRQF_TRIGGER_MASK;
 
         ret = smc_request_attrib(pdev);
         if (ret)
@@ -2170,6 +2194,7 @@ static int smc_drv_probe(struct platform_device *pdev)
 #if defined(CONFIG_SA1100_ASSABET)
         NCR_0 |= NCR_ENET_OSC_EN;
 #endif
+        platform_set_drvdata(pdev, ndev);
         ret = smc_enable_device(pdev);
         if (ret)
                 goto out_release_attrib;
@@ -2188,8 +2213,7 @@ static int smc_drv_probe(struct platform_device *pdev)
         }
 #endif
 
-        platform_set_drvdata(pdev, ndev);
-        ret = smc_probe(ndev, addr, irq_flags);
+        ret = smc_probe(ndev, addr, lp->cfg.irq_flags);
         if (ret != 0)
                 goto out_iounmap;
 
diff --git a/drivers/net/smc91x.h b/drivers/net/smc91x.h
index 92ff9c42367e..e044b4de1397 100644
--- a/drivers/net/smc91x.h
+++ b/drivers/net/smc91x.h
@@ -34,6 +34,7 @@
 #ifndef _SMC91X_H_
 #define _SMC91X_H_
 
+#include <linux/smc91x.h>
 
 /*
  * Define your architecture specific bus configuration parameters here.
@@ -481,6 +482,7 @@ static inline void LPD7_SMC_outsw (unsigned char* a, int r,
 #define RPC_LSA_DEFAULT         RPC_LED_100_10
 #define RPC_LSB_DEFAULT         RPC_LED_TX_RX
 
+#define SMC_DYNAMIC_BUS_CONFIG
 #endif
 
 
@@ -526,8 +528,19 @@ struct smc_local {
 #endif
         void __iomem *base;
         void __iomem *datacs;
+
+        struct smc91x_platdata cfg;
 };
 
+#ifdef SMC_DYNAMIC_BUS_CONFIG
+#define SMC_8BIT(p) (((p)->cfg.flags & SMC91X_USE_8BIT) && SMC_CAN_USE_8BIT)
+#define SMC_16BIT(p) (((p)->cfg.flags & SMC91X_USE_16BIT) && SMC_CAN_USE_16BIT)
+#define SMC_32BIT(p) (((p)->cfg.flags & SMC91X_USE_32BIT) && SMC_CAN_USE_32BIT)
+#else
+#define SMC_8BIT(p) SMC_CAN_USE_8BIT
+#define SMC_16BIT(p) SMC_CAN_USE_16BIT
+#define SMC_32BIT(p) SMC_CAN_USE_32BIT
+#endif
 
 #ifdef SMC_USE_PXA_DMA
 /*
@@ -1108,41 +1121,41 @@ static const char * chip_ids[ 16 ] =  {
  *
  * Enforce it on any 32-bit capable setup for now.
  */
-#define SMC_MUST_ALIGN_WRITE    SMC_CAN_USE_32BIT
+#define SMC_MUST_ALIGN_WRITE(lp)        SMC_32BIT(lp)
 
 #define SMC_GET_PN(lp)                                          \
-        (SMC_CAN_USE_8BIT       ? (SMC_inb(ioaddr, PN_REG(lp))) \
+        (SMC_8BIT(lp)   ? (SMC_inb(ioaddr, PN_REG(lp))) \
                                 : (SMC_inw(ioaddr, PN_REG(lp)) & 0xFF))
 
 #define SMC_SET_PN(lp, x)                                               \
         do {                                                            \
-                if (SMC_MUST_ALIGN_WRITE)                               \
+                if (SMC_MUST_ALIGN_WRITE(lp))                           \
                         SMC_outl((x)<<16, ioaddr, SMC_REG(lp, 0, 2));   \
-                else if (SMC_CAN_USE_8BIT)                              \
+                else if (SMC_8BIT(lp))                          \
                         SMC_outb(x, ioaddr, PN_REG(lp));                \
                 else                                                    \
                         SMC_outw(x, ioaddr, PN_REG(lp));                \
         } while (0)
 
 #define SMC_GET_AR(lp)                                          \
-        (SMC_CAN_USE_8BIT       ? (SMC_inb(ioaddr, AR_REG(lp))) \
+        (SMC_8BIT(lp)   ? (SMC_inb(ioaddr, AR_REG(lp))) \
                                 : (SMC_inw(ioaddr, PN_REG(lp)) >> 8))
 
 #define SMC_GET_TXFIFO(lp)                                              \
-        (SMC_CAN_USE_8BIT       ? (SMC_inb(ioaddr, TXFIFO_REG(lp)))     \
+        (SMC_8BIT(lp)   ? (SMC_inb(ioaddr, TXFIFO_REG(lp)))     \
                                 : (SMC_inw(ioaddr, TXFIFO_REG(lp)) & 0xFF))
 
 #define SMC_GET_RXFIFO(lp)                                              \
-        (SMC_CAN_USE_8BIT       ? (SMC_inb(ioaddr, RXFIFO_REG(lp)))     \
+        (SMC_8BIT(lp)   ? (SMC_inb(ioaddr, RXFIFO_REG(lp)))     \
                                 : (SMC_inw(ioaddr, TXFIFO_REG(lp)) >> 8))
 
 #define SMC_GET_INT(lp)                                         \
-        (SMC_CAN_USE_8BIT       ? (SMC_inb(ioaddr, INT_REG(lp)))        \
+        (SMC_8BIT(lp)   ? (SMC_inb(ioaddr, INT_REG(lp)))        \
                                 : (SMC_inw(ioaddr, INT_REG(lp)) & 0xFF))
 
 #define SMC_ACK_INT(lp, x)                                              \
         do {                                                            \
-                if (SMC_CAN_USE_8BIT)                                   \
+                if (SMC_8BIT(lp))                                       \
                         SMC_outb(x, ioaddr, INT_REG(lp));               \
                 else {                                                  \
                         unsigned long __flags;                          \
@@ -1155,12 +1168,12 @@ static const char * chip_ids[ 16 ] =  {
         } while (0)
 
 #define SMC_GET_INT_MASK(lp)                                            \
-        (SMC_CAN_USE_8BIT       ? (SMC_inb(ioaddr, IM_REG(lp))) \
+        (SMC_8BIT(lp)   ? (SMC_inb(ioaddr, IM_REG(lp))) \
                                 : (SMC_inw(ioaddr, INT_REG(lp)) >> 8))
 
 #define SMC_SET_INT_MASK(lp, x)                                 \
         do {                                                            \
-                if (SMC_CAN_USE_8BIT)                                   \
+                if (SMC_8BIT(lp))                                       \
                         SMC_outb(x, ioaddr, IM_REG(lp));                \
                 else                                                    \
                         SMC_outw((x) << 8, ioaddr, INT_REG(lp));        \
@@ -1170,7 +1183,7 @@ static const char * chip_ids[ 16 ] =  {
 
 #define SMC_SELECT_BANK(lp, x)                                  \
         do {                                                            \
-                if (SMC_MUST_ALIGN_WRITE)                               \
+                if (SMC_MUST_ALIGN_WRITE(lp))                           \
                         SMC_outl((x)<<16, ioaddr, 12<<SMC_IO_SHIFT);    \
                 else                                                    \
                         SMC_outw(x, ioaddr, BANK_SELECT);               \
@@ -1208,7 +1221,7 @@ static const char * chip_ids[ 16 ] =  {
 
 #define SMC_SET_PTR(lp, x)                                              \
         do {                                                            \
-                if (SMC_MUST_ALIGN_WRITE)                               \
+                if (SMC_MUST_ALIGN_WRITE(lp))                           \
                         SMC_outl((x)<<16, ioaddr, SMC_REG(lp, 4, 2));   \
                 else                                                    \
                         SMC_outw(x, ioaddr, PTR_REG(lp));               \
@@ -1226,7 +1239,7 @@ static const char * chip_ids[ 16 ] =  {
 
 #define SMC_SET_RPC(lp, x)                                              \
         do {                                                            \
-                if (SMC_MUST_ALIGN_WRITE)                               \
+                if (SMC_MUST_ALIGN_WRITE(lp))                           \
                         SMC_outl((x)<<16, ioaddr, SMC_REG(lp, 8, 0));   \
                 else                                                    \
                         SMC_outw(x, ioaddr, RPC_REG(lp));               \
@@ -1267,7 +1280,7 @@ static const char * chip_ids[ 16 ] =  {
 
 #define SMC_PUT_PKT_HDR(lp, status, length)                             \
         do {                                                            \
-                if (SMC_CAN_USE_32BIT)                                  \
+                if (SMC_32BIT(lp))                                      \
                         SMC_outl((status) | (length)<<16, ioaddr,       \
                                  DATA_REG(lp));                 \
                 else {                                                  \
@@ -1278,7 +1291,7 @@ static const char * chip_ids[ 16 ] =  {
 
 #define SMC_GET_PKT_HDR(lp, status, length)                             \
         do {                                                            \
-                if (SMC_CAN_USE_32BIT) {                                \
+                if (SMC_32BIT(lp)) {                            \
                         unsigned int __val = SMC_inl(ioaddr, DATA_REG(lp)); \
                         (status) = __val & 0xffff;                      \
                         (length) = __val >> 16;                         \
@@ -1290,7 +1303,7 @@ static const char * chip_ids[ 16 ] =  {
 
 #define SMC_PUSH_DATA(lp, p, l)                                 \
         do {                                                            \
-                if (SMC_CAN_USE_32BIT) {                                \
+                if (SMC_32BIT(lp)) {                            \
                         void *__ptr = (p);                              \
                         int __len = (l);                                \
                         void __iomem *__ioaddr = ioaddr;                \
@@ -1308,15 +1321,15 @@ static const char * chip_ids[ 16 ] =  {
                                 SMC_outw(*((u16 *)__ptr), ioaddr,       \
                                          DATA_REG(lp));         \
                         }                                               \
-                } else if (SMC_CAN_USE_16BIT)                           \
+                } else if (SMC_16BIT(lp))                               \
                         SMC_outsw(ioaddr, DATA_REG(lp), p, (l) >> 1);   \
-                else if (SMC_CAN_USE_8BIT)                              \
+                else if (SMC_8BIT(lp))                          \
                         SMC_outsb(ioaddr, DATA_REG(lp), p, l);  \
         } while (0)
 
 #define SMC_PULL_DATA(lp, p, l)                                 \
         do {                                                            \
-                if (SMC_CAN_USE_32BIT) {                                \
+                if (SMC_32BIT(lp)) {                            \
                         void *__ptr = (p);                              \
                         int __len = (l);                                \
                         void __iomem *__ioaddr = ioaddr;                \
@@ -1343,9 +1356,9 @@ static const char * chip_ids[ 16 ] =  {
                                 __ioaddr = lp->datacs;                  \
                         __len += 2;                                     \
                         SMC_insl(__ioaddr, DATA_REG(lp), __ptr, __len>>2); \
-                } else if (SMC_CAN_USE_16BIT)                           \
+                } else if (SMC_16BIT(lp))                               \
                         SMC_insw(ioaddr, DATA_REG(lp), p, (l) >> 1);    \
-                else if (SMC_CAN_USE_8BIT)                              \
+                else if (SMC_8BIT(lp))                          \
                         SMC_insb(ioaddr, DATA_REG(lp), p, l);           \
         } while (0)
 
diff --git a/include/linux/smc91x.h b/include/linux/smc91x.h
new file mode 100644
index 000000000000..8e0556b8781c
--- /dev/null
+++ b/include/linux/smc91x.h
@@ -0,0 +1,13 @@
+#ifndef __SMC91X_H__
+#define __SMC91X_H__
+
+#define SMC91X_USE_8BIT (1 << 0)
+#define SMC91X_USE_16BIT (1 << 1)
+#define SMC91X_USE_32BIT (1 << 2)
+
+struct smc91x_platdata {
+        unsigned long flags;
+        unsigned long irq_flags; /* IRQF_... */
+};
+
+#endif /* __SMC91X_H__ */