From 28bd620c7a1244e59459d6293ca11f162e0a67b9 Mon Sep 17 00:00:00 2001 From: "David J. Choi" Date: Tue, 13 Jul 2010 10:09:19 -0700 Subject: drivers/net: Add Micrel KS8841/42 support to ks8842 driver Body of the explanation: -support 16bit and 32bit bus width. -add device reset for ks8842/8841 Micrel device. -set 100Mbps as a default for Micrel device. -set MAC address in both MAC/Switch layer with different sequence for Micrel device, as mentioned in data sheet. -use private data to set options both 16/32bit bus width and Micrel device/ Timberdale(FPGA). -update Kconfig in order to put more information about ks8842 device. Signed-off-by: David J. Choi Signed-off-by: David S. Miller --- drivers/net/Kconfig | 7 ++- drivers/net/ks8842.c | 174 ++++++++++++++++++++++++++++++++++++++------------- 2 files changed, 133 insertions(+), 48 deletions(-) diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index f65857e88ec1..88294762f9e6 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -1750,11 +1750,12 @@ config TLAN Please email feedback to . config KS8842 - tristate "Micrel KSZ8842" + tristate "Micrel KSZ8841/42 with generic bus interface" depends on HAS_IOMEM help - This platform driver is for Micrel KSZ8842 / KS8842 - 2-port ethernet switch chip (managed, VLAN, QoS). + This platform driver is for KSZ8841(1-port) / KS8842(2-port) + ethernet switch chip (managed, VLAN, QoS) from Micrel or + Timberdale(FPGA). config KS8851 tristate "Micrel KS8851 SPI" diff --git a/drivers/net/ks8842.c b/drivers/net/ks8842.c index 0be92613acf0..ee69dea69be8 100644 --- a/drivers/net/ks8842.c +++ b/drivers/net/ks8842.c @@ -18,6 +18,7 @@ /* Supports: * The Micrel KS8842 behind the timberdale FPGA + * The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -114,9 +115,14 @@ #define REG_P1CR4 0x02 #define REG_P1SR 0x04 +/* flags passed by platform_device for configuration */ +#define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */ +#define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */ + struct ks8842_adapter { void __iomem *hw_addr; int irq; + unsigned long conf_flags; /* copy of platform_device config */ struct tasklet_struct tasklet; spinlock_t lock; /* spinlock to be interrupt safe */ struct work_struct timeout_work; @@ -192,15 +198,21 @@ static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank, static void ks8842_reset(struct ks8842_adapter *adapter) { - /* The KS8842 goes haywire when doing softare reset - * a work around in the timberdale IP is implemented to - * do a hardware reset instead - ks8842_write16(adapter, 3, 1, REG_GRR); - msleep(10); - iowrite16(0, adapter->hw_addr + REG_GRR); - */ - iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST); - msleep(20); + if (adapter->conf_flags & MICREL_KS884X) { + ks8842_write16(adapter, 3, 1, REG_GRR); + msleep(10); + iowrite16(0, adapter->hw_addr + REG_GRR); + } else { + /* The KS8842 goes haywire when doing softare reset + * a work around in the timberdale IP is implemented to + * do a hardware reset instead + ks8842_write16(adapter, 3, 1, REG_GRR); + msleep(10); + iowrite16(0, adapter->hw_addr + REG_GRR); + */ + iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST); + msleep(20); + } } static void ks8842_update_link_status(struct net_device *netdev, @@ -269,8 +281,10 @@ static void ks8842_reset_hw(struct ks8842_adapter *adapter) /* restart port auto-negotiation */ ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4); - /* only advertise 10Mbps */ - ks8842_clear_bits(adapter, 49, 3 << 2, REG_P1CR4); + + if (!(adapter->conf_flags & MICREL_KS884X)) + /* only advertise 10Mbps */ + ks8842_clear_bits(adapter, 49, 3 << 2, REG_P1CR4); /* Enable the transmitter */ ks8842_enable_tx(adapter); @@ -296,13 +310,28 @@ static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest) for (i = 0; i < ETH_ALEN; i++) dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i); - /* make sure the switch port uses the same MAC as the QMU */ - mac = ks8842_read16(adapter, 2, REG_MARL); - ks8842_write16(adapter, 39, mac, REG_MACAR1); - mac = ks8842_read16(adapter, 2, REG_MARM); - ks8842_write16(adapter, 39, mac, REG_MACAR2); - mac = ks8842_read16(adapter, 2, REG_MARH); - ks8842_write16(adapter, 39, mac, REG_MACAR3); + if (adapter->conf_flags & MICREL_KS884X) { + /* + the sequence of saving mac addr between MAC and Switch is + different. + */ + + mac = ks8842_read16(adapter, 2, REG_MARL); + ks8842_write16(adapter, 39, mac, REG_MACAR3); + mac = ks8842_read16(adapter, 2, REG_MARM); + ks8842_write16(adapter, 39, mac, REG_MACAR2); + mac = ks8842_read16(adapter, 2, REG_MARH); + ks8842_write16(adapter, 39, mac, REG_MACAR1); + } else { + + /* make sure the switch port uses the same MAC as the QMU */ + mac = ks8842_read16(adapter, 2, REG_MARL); + ks8842_write16(adapter, 39, mac, REG_MACAR1); + mac = ks8842_read16(adapter, 2, REG_MARM); + ks8842_write16(adapter, 39, mac, REG_MACAR2); + mac = ks8842_read16(adapter, 2, REG_MARH); + ks8842_write16(adapter, 39, mac, REG_MACAR3); + } } static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac) @@ -313,8 +342,25 @@ static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac) spin_lock_irqsave(&adapter->lock, flags); for (i = 0; i < ETH_ALEN; i++) { ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i); - ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1], - REG_MACAR1 + i); + if (!(adapter->conf_flags & MICREL_KS884X)) + ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1], + REG_MACAR1 + i); + } + + if (adapter->conf_flags & MICREL_KS884X) { + /* + the sequence of saving mac addr between MAC and Switch is + different. + */ + + u16 mac; + + mac = ks8842_read16(adapter, 2, REG_MARL); + ks8842_write16(adapter, 39, mac, REG_MACAR3); + mac = ks8842_read16(adapter, 2, REG_MARM); + ks8842_write16(adapter, 39, mac, REG_MACAR2); + mac = ks8842_read16(adapter, 2, REG_MARH); + ks8842_write16(adapter, 39, mac, REG_MACAR1); } spin_unlock_irqrestore(&adapter->lock, flags); } @@ -328,8 +374,6 @@ static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) { struct ks8842_adapter *adapter = netdev_priv(netdev); int len = skb->len; - u32 *ptr = (u32 *)skb->data; - u32 ctrl; netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n", __func__, skb->len, skb->head, skb->data, @@ -339,17 +383,34 @@ static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) if (ks8842_tx_fifo_space(adapter) < len + 8) return NETDEV_TX_BUSY; - /* the control word, enable IRQ, port 1 and the length */ - ctrl = 0x8000 | 0x100 | (len << 16); - ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO); + if (adapter->conf_flags & KS884X_16BIT) { + u16 *ptr16 = (u16 *)skb->data; + ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO); + ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI); + netdev->stats.tx_bytes += len; + + /* copy buffer */ + while (len > 0) { + iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO); + iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI); + len -= sizeof(u32); + } + } else { + + u32 *ptr = (u32 *)skb->data; + u32 ctrl; + /* the control word, enable IRQ, port 1 and the length */ + ctrl = 0x8000 | 0x100 | (len << 16); + ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO); - netdev->stats.tx_bytes += len; + netdev->stats.tx_bytes += len; - /* copy buffer */ - while (len > 0) { - iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO); - len -= sizeof(u32); - ptr++; + /* copy buffer */ + while (len > 0) { + iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO); + len -= sizeof(u32); + ptr++; + } } /* enqueue packet */ @@ -363,12 +424,23 @@ static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) static void ks8842_rx_frame(struct net_device *netdev, struct ks8842_adapter *adapter) { - u32 status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO); - int len = (status >> 16) & 0x7ff; + u16 status16; + u32 status; + int len; - status &= 0xffff; - - netdev_dbg(netdev, "%s - rx_data: status: %x\n", __func__, status); + if (adapter->conf_flags & KS884X_16BIT) { + status16 = ks8842_read16(adapter, 17, REG_QMU_DATA_LO); + len = (int)ks8842_read16(adapter, 17, REG_QMU_DATA_HI); + len &= 0xffff; + netdev_dbg(netdev, "%s - rx_data: status: %x\n", + __func__, status16); + } else { + status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO); + len = (status >> 16) & 0x7ff; + status &= 0xffff; + netdev_dbg(netdev, "%s - rx_data: status: %x\n", + __func__, status); + } /* check the status */ if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { @@ -376,22 +448,32 @@ static void ks8842_rx_frame(struct net_device *netdev, netdev_dbg(netdev, "%s, got package, len: %d\n", __func__, len); if (skb) { - u32 *data; netdev->stats.rx_packets++; netdev->stats.rx_bytes += len; if (status & RXSR_MULTICAST) netdev->stats.multicast++; - data = (u32 *)skb_put(skb, len); - - ks8842_select_bank(adapter, 17); - while (len > 0) { - *data++ = ioread32(adapter->hw_addr + - REG_QMU_DATA_LO); - len -= sizeof(u32); + if (adapter->conf_flags & KS884X_16BIT) { + u16 *data16 = (u16 *)skb_put(skb, len); + ks8842_select_bank(adapter, 17); + while (len > 0) { + *data16++ = ioread16(adapter->hw_addr + + REG_QMU_DATA_LO); + *data16++ = ioread16(adapter->hw_addr + + REG_QMU_DATA_HI); + len -= sizeof(u32); + } + } else { + u32 *data = (u32 *)skb_put(skb, len); + + ks8842_select_bank(adapter, 17); + while (len > 0) { + *data++ = ioread32(adapter->hw_addr + + REG_QMU_DATA_LO); + len -= sizeof(u32); + } } - skb->protocol = eth_type_trans(skb, netdev); netif_rx(skb); } else @@ -669,6 +751,8 @@ static int __devinit ks8842_probe(struct platform_device *pdev) adapter->netdev = netdev; INIT_WORK(&adapter->timeout_work, ks8842_tx_timeout_work); adapter->hw_addr = ioremap(iomem->start, resource_size(iomem)); + adapter->conf_flags = iomem->flags; + if (!adapter->hw_addr) goto err_ioremap; -- cgit v1.2.3