net: macb: Prepare for driver-model conversion

Adjust this driver to avoid using struct netdev in functions that driver
model will call. Also refactor the receive function to be compatible with
driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Tested-on: smartweb, corvus, taurus, axm
Tested-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 4bf8fa4..8be62af 100644 (file)
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -84,6 +84,8 @@ struct macb_device {
        unsigned int            rx_tail;
        unsigned int            tx_head;
        unsigned int            tx_tail;
+       unsigned int            next_rx_tail;
+       bool                    wrapped;
 
        void                    *rx_buffer;
        void                    *tx_buffer;
@@ -255,9 +257,9 @@ static inline void macb_invalidate_rx_buffer(struct macb_device *macb)
 
 #if defined(CONFIG_CMD_NET)
 
-static int macb_send(struct eth_device *netdev, void *packet, int length)
+static int _macb_send(struct macb_device *macb, const char *name, void *packet,
+                     int length)
 {
-       struct macb_device *macb = to_macb(netdev);
        unsigned long paddr, ctrl;
        unsigned int tx_head = macb->tx_head;
        int i;
@@ -298,12 +300,11 @@ static int macb_send(struct eth_device *netdev, void *packet, int length)
 
        if (i <= MACB_TX_TIMEOUT) {
                if (ctrl & TXBUF_UNDERRUN)
-                       printf("%s: TX underrun\n", netdev->name);
+                       printf("%s: TX underrun\n", name);
                if (ctrl & TXBUF_EXHAUSTED)
-                       printf("%s: TX buffers exhausted in mid frame\n",
-                              netdev->name);
+                       printf("%s: TX buffers exhausted in mid frame\n", name);
        } else {
-               printf("%s: TX timeout\n", netdev->name);
+               printf("%s: TX timeout\n", name);
        }
 
        /* No one cares anyway */
@@ -335,26 +336,25 @@ static void reclaim_rx_buffers(struct macb_device *macb,
        macb->rx_tail = new_tail;
 }
 
-static int macb_recv(struct eth_device *netdev)
+static int _macb_recv(struct macb_device *macb, uchar **packetp)
 {
-       struct macb_device *macb = to_macb(netdev);
-       unsigned int rx_tail = macb->rx_tail;
+       unsigned int next_rx_tail = macb->next_rx_tail;
        void *buffer;
        int length;
-       int wrapped = 0;
        u32 status;
 
+       macb->wrapped = false;
        for (;;) {
                macb_invalidate_ring_desc(macb, RX);
 
-               if (!(macb->rx_ring[rx_tail].addr & RXADDR_USED))
-                       return -1;
+               if (!(macb->rx_ring[next_rx_tail].addr & RXADDR_USED))
+                       return -EAGAIN;
 
-               status = macb->rx_ring[rx_tail].ctrl;
+               status = macb->rx_ring[next_rx_tail].ctrl;
                if (status & RXBUF_FRAME_START) {
-                       if (rx_tail != macb->rx_tail)
-                               reclaim_rx_buffers(macb, rx_tail);
-                       wrapped = 0;
+                       if (next_rx_tail != macb->rx_tail)
+                               reclaim_rx_buffers(macb, next_rx_tail);
+                       macb->wrapped = false;
                }
 
                if (status & RXBUF_FRAME_END) {
@@ -362,7 +362,7 @@ static int macb_recv(struct eth_device *netdev)
                        length = status & RXBUF_FRMLEN_MASK;
 
                        macb_invalidate_rx_buffer(macb);
-                       if (wrapped) {
+                       if (macb->wrapped) {
                                unsigned int headlen, taillen;
 
                                headlen = 128 * (MACB_RX_RING_SIZE
@@ -372,34 +372,33 @@ static int macb_recv(struct eth_device *netdev)
                                       buffer, headlen);
                                memcpy((void *)net_rx_packets[0] + headlen,
                                       macb->rx_buffer, taillen);
-                               buffer = (void *)net_rx_packets[0];
+                               *packetp = (void *)net_rx_packets[0];
+                       } else {
+                               *packetp = buffer;
                        }
 
-                       net_process_received_packet(buffer, length);
-                       if (++rx_tail >= MACB_RX_RING_SIZE)
-                               rx_tail = 0;
-                       reclaim_rx_buffers(macb, rx_tail);
+                       if (++next_rx_tail >= MACB_RX_RING_SIZE)
+                               next_rx_tail = 0;
+                       macb->next_rx_tail = next_rx_tail;
+                       return length;
                } else {
-                       if (++rx_tail >= MACB_RX_RING_SIZE) {
-                               wrapped = 1;
-                               rx_tail = 0;
+                       if (++next_rx_tail >= MACB_RX_RING_SIZE) {
+                               macb->wrapped = true;
+                               next_rx_tail = 0;
                        }
                }
                barrier();
        }
-
-       return 0;
 }
 
-static void macb_phy_reset(struct macb_device *macb)
+static void macb_phy_reset(struct macb_device *macb, const char *name)
 {
-       struct eth_device *netdev = &macb->netdev;
        int i;
        u16 status, adv;
 
        adv = ADVERTISE_CSMA | ADVERTISE_ALL;
        macb_mdio_write(macb, MII_ADVERTISE, adv);
-       printf("%s: Starting autonegotiation...\n", netdev->name);
+       printf("%s: Starting autonegotiation...\n", name);
        macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
                                         | BMCR_ANRESTART));
 
@@ -411,10 +410,10 @@ static void macb_phy_reset(struct macb_device *macb)
        }
 
        if (status & BMSR_ANEGCOMPLETE)
-               printf("%s: Autonegotiation complete\n", netdev->name);
+               printf("%s: Autonegotiation complete\n", name);
        else
                printf("%s: Autonegotiation timed out (status=0x%04x)\n",
-                      netdev->name, status);
+                      name, status);
 }
 
 #ifdef CONFIG_MACB_SEARCH_PHY
@@ -441,9 +440,8 @@ static int macb_phy_find(struct macb_device *macb)
 #endif /* CONFIG_MACB_SEARCH_PHY */
 
 
-static int macb_phy_init(struct macb_device *macb)
+static int macb_phy_init(struct macb_device *macb, const char *name)
 {
-       struct eth_device *netdev = &macb->netdev;
 #ifdef CONFIG_PHYLIB
        struct phy_device *phydev;
 #endif
@@ -452,7 +450,7 @@ static int macb_phy_init(struct macb_device *macb)
        int media, speed, duplex;
        int i;
 
-       arch_get_mdio_control(netdev->name);
+       arch_get_mdio_control(name);
 #ifdef CONFIG_MACB_SEARCH_PHY
        /* Auto-detect phy_addr */
        if (!macb_phy_find(macb))
@@ -462,13 +460,13 @@ static int macb_phy_init(struct macb_device *macb)
        /* Check if the PHY is up to snuff... */
        phy_id = macb_mdio_read(macb, MII_PHYSID1);
        if (phy_id == 0xffff) {
-               printf("%s: No PHY present\n", netdev->name);
+               printf("%s: No PHY present\n", name);
                return 0;
        }
 
 #ifdef CONFIG_PHYLIB
        /* need to consider other phy interface mode */
-       phydev = phy_connect(macb->bus, macb->phy_addr, netdev,
+       phydev = phy_connect(macb->bus, macb->phy_addr, &macb->netdev,
                             PHY_INTERFACE_MODE_RGMII);
        if (!phydev) {
                printf("phy_connect failed\n");
@@ -481,7 +479,7 @@ static int macb_phy_init(struct macb_device *macb)
        status = macb_mdio_read(macb, MII_BMSR);
        if (!(status & BMSR_LSTATUS)) {
                /* Try to re-negotiate if we don't have link already. */
-               macb_phy_reset(macb);
+               macb_phy_reset(macb, name);
 
                for (i = 0; i < MACB_AUTONEG_TIMEOUT / 100; i++) {
                        status = macb_mdio_read(macb, MII_BMSR);
@@ -493,7 +491,7 @@ static int macb_phy_init(struct macb_device *macb)
 
        if (!(status & BMSR_LSTATUS)) {
                printf("%s: link down (status: 0x%04x)\n",
-                      netdev->name, status);
+                      name, status);
                return 0;
        }
 
@@ -505,7 +503,7 @@ static int macb_phy_init(struct macb_device *macb)
                        duplex = ((lpa & LPA_1000FULL) ? 1 : 0);
 
                        printf("%s: link up, 1000Mbps %s-duplex (lpa: 0x%04x)\n",
-                              netdev->name,
+                              name,
                               duplex ? "full" : "half",
                               lpa);
 
@@ -530,7 +528,7 @@ static int macb_phy_init(struct macb_device *macb)
                 ? 1 : 0);
        duplex = (media & ADVERTISE_FULL) ? 1 : 0;
        printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
-              netdev->name,
+              name,
               speed ? "100" : "10",
               duplex ? "full" : "half",
               lpa);
@@ -570,9 +568,8 @@ static int gmac_init_multi_queues(struct macb_device *macb)
        return 0;
 }
 
-static int macb_init(struct eth_device *netdev, bd_t *bd)
+static int _macb_init(struct macb_device *macb, const char *name)
 {
-       struct macb_device *macb = to_macb(netdev);
        unsigned long paddr;
        int i;
 
@@ -605,6 +602,7 @@ static int macb_init(struct eth_device *netdev, bd_t *bd)
        macb->rx_tail = 0;
        macb->tx_head = 0;
        macb->tx_tail = 0;
+       macb->next_rx_tail = 0;
 
        macb_writel(macb, RBQP, macb->rx_ring_dma);
        macb_writel(macb, TBQP, macb->tx_ring_dma);
@@ -641,7 +639,7 @@ static int macb_init(struct eth_device *netdev, bd_t *bd)
 #endif /* CONFIG_RMII */
        }
 
-       if (!macb_phy_init(macb))
+       if (!macb_phy_init(macb, name))
                return -1;
 
        /* Enable TX and RX */
@@ -650,9 +648,8 @@ static int macb_init(struct eth_device *netdev, bd_t *bd)
        return 0;
 }
 
-static void macb_halt(struct eth_device *netdev)
+static void _macb_halt(struct macb_device *macb)
 {
-       struct macb_device *macb = to_macb(netdev);
        u32 ncr, tsr;
 
        /* Halt the controller and wait for any ongoing transmission to end. */
@@ -668,17 +665,16 @@ static void macb_halt(struct eth_device *netdev)
        macb_writel(macb, NCR, MACB_BIT(CLRSTAT));
 }
 
-static int macb_write_hwaddr(struct eth_device *dev)
+static int _macb_write_hwaddr(struct macb_device *macb, unsigned char *enetaddr)
 {
-       struct macb_device *macb = to_macb(dev);
        u32 hwaddr_bottom;
        u16 hwaddr_top;
 
        /* set hardware address */
-       hwaddr_bottom = dev->enetaddr[0] | dev->enetaddr[1] << 8 |
-                       dev->enetaddr[2] << 16 | dev->enetaddr[3] << 24;
+       hwaddr_bottom = enetaddr[0] | enetaddr[1] << 8 |
+                       enetaddr[2] << 16 | enetaddr[3] << 24;
        macb_writel(macb, SA1B, hwaddr_bottom);
-       hwaddr_top = dev->enetaddr[4] | dev->enetaddr[5] << 8;
+       hwaddr_top = enetaddr[4] | enetaddr[5] << 8;
        macb_writel(macb, SA1T, hwaddr_top);
        return 0;
 }
@@ -739,11 +735,86 @@ static u32 macb_dbw(struct macb_device *macb)
        }
 }
 
+static void _macb_eth_initialize(struct macb_device *macb)
+{
+       int id = 0;     /* This is not used by functions we call */
+       u32 ncfgr;
+
+       /* TODO: we need check the rx/tx_ring_dma is dcache line aligned */
+       macb->rx_buffer = dma_alloc_coherent(MACB_RX_BUFFER_SIZE,
+                                            &macb->rx_buffer_dma);
+       macb->rx_ring = dma_alloc_coherent(MACB_RX_DMA_DESC_SIZE,
+                                          &macb->rx_ring_dma);
+       macb->tx_ring = dma_alloc_coherent(MACB_TX_DMA_DESC_SIZE,
+                                          &macb->tx_ring_dma);
+       macb->dummy_desc = dma_alloc_coherent(MACB_TX_DUMMY_DMA_DESC_SIZE,
+                                          &macb->dummy_desc_dma);
+
+       /*
+        * Do some basic initialization so that we at least can talk
+        * to the PHY
+        */
+       if (macb_is_gem(macb)) {
+               ncfgr = gem_mdc_clk_div(id, macb);
+               ncfgr |= macb_dbw(macb);
+       } else {
+               ncfgr = macb_mdc_clk_div(id, macb);
+       }
+
+       macb_writel(macb, NCFGR, ncfgr);
+}
+
+static int macb_send(struct eth_device *netdev, void *packet, int length)
+{
+       struct macb_device *macb = to_macb(netdev);
+
+       return _macb_send(macb, netdev->name, packet, length);
+}
+
+static int macb_recv(struct eth_device *netdev)
+{
+       struct macb_device *macb = to_macb(netdev);
+       uchar *packet;
+       int length;
+
+       macb->wrapped = false;
+       for (;;) {
+               macb->next_rx_tail = macb->rx_tail;
+               length = _macb_recv(macb, &packet);
+               if (length >= 0) {
+                       net_process_received_packet(packet, length);
+                       reclaim_rx_buffers(macb, macb->next_rx_tail);
+               } else if (length < 0) {
+                       return length;
+               }
+       }
+}
+
+static int macb_init(struct eth_device *netdev, bd_t *bd)
+{
+       struct macb_device *macb = to_macb(netdev);
+
+       return _macb_init(macb, netdev->name);
+}
+
+static void macb_halt(struct eth_device *netdev)
+{
+       struct macb_device *macb = to_macb(netdev);
+
+       return _macb_halt(macb);
+}
+
+static int macb_write_hwaddr(struct eth_device *netdev)
+{
+       struct macb_device *macb = to_macb(netdev);
+
+       return _macb_write_hwaddr(macb, netdev->enetaddr);
+}
+
 int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
 {
        struct macb_device *macb;
        struct eth_device *netdev;
-       u32 ncfgr;
 
        macb = malloc(sizeof(struct macb_device));
        if (!macb) {
@@ -754,17 +825,6 @@ int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
 
        netdev = &macb->netdev;
 
-       macb->rx_buffer = dma_alloc_coherent(MACB_RX_BUFFER_SIZE,
-                                            &macb->rx_buffer_dma);
-       macb->rx_ring = dma_alloc_coherent(MACB_RX_DMA_DESC_SIZE,
-                                          &macb->rx_ring_dma);
-       macb->tx_ring = dma_alloc_coherent(MACB_TX_DMA_DESC_SIZE,
-                                          &macb->tx_ring_dma);
-       macb->dummy_desc = dma_alloc_coherent(MACB_TX_DUMMY_DMA_DESC_SIZE,
-                                          &macb->dummy_desc_dma);
-
-       /* TODO: we need check the rx/tx_ring_dma is dcache line aligned */
-
        macb->regs = regs;
        macb->phy_addr = phy_addr;
 
@@ -779,18 +839,7 @@ int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
        netdev->recv = macb_recv;
        netdev->write_hwaddr = macb_write_hwaddr;
 
-       /*
-        * Do some basic initialization so that we at least can talk
-        * to the PHY
-        */
-       if (macb_is_gem(macb)) {
-               ncfgr = gem_mdc_clk_div(id, macb);
-               ncfgr |= macb_dbw(macb);
-       } else {
-               ncfgr = macb_mdc_clk_div(id, macb);
-       }
-
-       macb_writel(macb, NCFGR, ncfgr);
+       _macb_eth_initialize(macb);
 
        eth_register(netdev);