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1259 lines
32 KiB
1259 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* ks8842.c timberdale KS8842 ethernet driver |
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* Copyright (c) 2009 Intel Corporation |
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*/ |
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|
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/* Supports: |
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* The Micrel KS8842 behind the timberdale FPGA |
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* The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/ethtool.h> |
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#include <linux/ks8842.h> |
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#include <linux/dmaengine.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/scatterlist.h> |
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#define DRV_NAME "ks8842" |
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|
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/* Timberdale specific Registers */ |
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#define REG_TIMB_RST 0x1c |
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#define REG_TIMB_FIFO 0x20 |
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#define REG_TIMB_ISR 0x24 |
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#define REG_TIMB_IER 0x28 |
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#define REG_TIMB_IAR 0x2C |
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#define REQ_TIMB_DMA_RESUME 0x30 |
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|
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/* KS8842 registers */ |
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#define REG_SELECT_BANK 0x0e |
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|
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/* bank 0 registers */ |
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#define REG_QRFCR 0x04 |
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/* bank 2 registers */ |
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#define REG_MARL 0x00 |
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#define REG_MARM 0x02 |
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#define REG_MARH 0x04 |
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|
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/* bank 3 registers */ |
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#define REG_GRR 0x06 |
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|
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/* bank 16 registers */ |
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#define REG_TXCR 0x00 |
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#define REG_TXSR 0x02 |
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#define REG_RXCR 0x04 |
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#define REG_TXMIR 0x08 |
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#define REG_RXMIR 0x0A |
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|
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/* bank 17 registers */ |
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#define REG_TXQCR 0x00 |
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#define REG_RXQCR 0x02 |
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#define REG_TXFDPR 0x04 |
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#define REG_RXFDPR 0x06 |
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#define REG_QMU_DATA_LO 0x08 |
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#define REG_QMU_DATA_HI 0x0A |
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|
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/* bank 18 registers */ |
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#define REG_IER 0x00 |
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#define IRQ_LINK_CHANGE 0x8000 |
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#define IRQ_TX 0x4000 |
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#define IRQ_RX 0x2000 |
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#define IRQ_RX_OVERRUN 0x0800 |
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#define IRQ_TX_STOPPED 0x0200 |
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#define IRQ_RX_STOPPED 0x0100 |
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#define IRQ_RX_ERROR 0x0080 |
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#define ENABLED_IRQS (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \ |
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IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR) |
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/* When running via timberdale in DMA mode, the RX interrupt should be |
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enabled in the KS8842, but not in the FPGA IP, since the IP handles |
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RX DMA internally. |
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TX interrupts are not needed it is handled by the FPGA the driver is |
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notified via DMA callbacks. |
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*/ |
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#define ENABLED_IRQS_DMA_IP (IRQ_LINK_CHANGE | IRQ_RX_STOPPED | \ |
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IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR) |
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#define ENABLED_IRQS_DMA (ENABLED_IRQS_DMA_IP | IRQ_RX) |
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#define REG_ISR 0x02 |
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#define REG_RXSR 0x04 |
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#define RXSR_VALID 0x8000 |
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#define RXSR_BROADCAST 0x80 |
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#define RXSR_MULTICAST 0x40 |
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#define RXSR_UNICAST 0x20 |
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#define RXSR_FRAMETYPE 0x08 |
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#define RXSR_TOO_LONG 0x04 |
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#define RXSR_RUNT 0x02 |
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#define RXSR_CRC_ERROR 0x01 |
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#define RXSR_ERROR (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR) |
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|
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/* bank 32 registers */ |
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#define REG_SW_ID_AND_ENABLE 0x00 |
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#define REG_SGCR1 0x02 |
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#define REG_SGCR2 0x04 |
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#define REG_SGCR3 0x06 |
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/* bank 39 registers */ |
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#define REG_MACAR1 0x00 |
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#define REG_MACAR2 0x02 |
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#define REG_MACAR3 0x04 |
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|
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/* bank 45 registers */ |
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#define REG_P1MBCR 0x00 |
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#define REG_P1MBSR 0x02 |
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/* bank 46 registers */ |
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#define REG_P2MBCR 0x00 |
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#define REG_P2MBSR 0x02 |
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|
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/* bank 48 registers */ |
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#define REG_P1CR2 0x02 |
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/* bank 49 registers */ |
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#define REG_P1CR4 0x02 |
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#define REG_P1SR 0x04 |
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|
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/* flags passed by platform_device for configuration */ |
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#define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */ |
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#define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */ |
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#define DMA_BUFFER_SIZE 2048 |
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struct ks8842_tx_dma_ctl { |
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struct dma_chan *chan; |
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struct dma_async_tx_descriptor *adesc; |
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void *buf; |
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struct scatterlist sg; |
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int channel; |
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}; |
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struct ks8842_rx_dma_ctl { |
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struct dma_chan *chan; |
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struct dma_async_tx_descriptor *adesc; |
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struct sk_buff *skb; |
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struct scatterlist sg; |
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struct tasklet_struct tasklet; |
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int channel; |
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}; |
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#define KS8842_USE_DMA(adapter) (((adapter)->dma_tx.channel != -1) && \ |
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((adapter)->dma_rx.channel != -1)) |
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struct ks8842_adapter { |
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void __iomem *hw_addr; |
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int irq; |
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unsigned long conf_flags; /* copy of platform_device config */ |
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struct tasklet_struct tasklet; |
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spinlock_t lock; /* spinlock to be interrupt safe */ |
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struct work_struct timeout_work; |
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struct net_device *netdev; |
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struct device *dev; |
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struct ks8842_tx_dma_ctl dma_tx; |
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struct ks8842_rx_dma_ctl dma_rx; |
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}; |
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static void ks8842_dma_rx_cb(void *data); |
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static void ks8842_dma_tx_cb(void *data); |
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static inline void ks8842_resume_dma(struct ks8842_adapter *adapter) |
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{ |
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iowrite32(1, adapter->hw_addr + REQ_TIMB_DMA_RESUME); |
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} |
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static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank) |
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{ |
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iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK); |
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} |
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static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank, |
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u8 value, int offset) |
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{ |
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ks8842_select_bank(adapter, bank); |
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iowrite8(value, adapter->hw_addr + offset); |
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} |
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static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank, |
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u16 value, int offset) |
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{ |
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ks8842_select_bank(adapter, bank); |
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iowrite16(value, adapter->hw_addr + offset); |
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} |
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static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank, |
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u16 bits, int offset) |
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{ |
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u16 reg; |
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ks8842_select_bank(adapter, bank); |
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reg = ioread16(adapter->hw_addr + offset); |
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reg |= bits; |
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iowrite16(reg, adapter->hw_addr + offset); |
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} |
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static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank, |
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u16 bits, int offset) |
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{ |
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u16 reg; |
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ks8842_select_bank(adapter, bank); |
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reg = ioread16(adapter->hw_addr + offset); |
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reg &= ~bits; |
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iowrite16(reg, adapter->hw_addr + offset); |
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} |
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static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank, |
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u32 value, int offset) |
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{ |
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ks8842_select_bank(adapter, bank); |
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iowrite32(value, adapter->hw_addr + offset); |
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} |
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static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank, |
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int offset) |
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{ |
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ks8842_select_bank(adapter, bank); |
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return ioread8(adapter->hw_addr + offset); |
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} |
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static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank, |
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int offset) |
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{ |
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ks8842_select_bank(adapter, bank); |
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return ioread16(adapter->hw_addr + offset); |
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} |
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static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank, |
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int offset) |
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{ |
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ks8842_select_bank(adapter, bank); |
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return ioread32(adapter->hw_addr + offset); |
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} |
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static void ks8842_reset(struct ks8842_adapter *adapter) |
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{ |
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if (adapter->conf_flags & MICREL_KS884X) { |
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ks8842_write16(adapter, 3, 1, REG_GRR); |
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msleep(10); |
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iowrite16(0, adapter->hw_addr + REG_GRR); |
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} else { |
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/* The KS8842 goes haywire when doing softare reset |
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* a work around in the timberdale IP is implemented to |
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* do a hardware reset instead |
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ks8842_write16(adapter, 3, 1, REG_GRR); |
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msleep(10); |
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iowrite16(0, adapter->hw_addr + REG_GRR); |
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*/ |
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iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST); |
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msleep(20); |
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} |
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} |
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static void ks8842_update_link_status(struct net_device *netdev, |
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struct ks8842_adapter *adapter) |
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{ |
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/* check the status of the link */ |
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if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) { |
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netif_carrier_on(netdev); |
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netif_wake_queue(netdev); |
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} else { |
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netif_stop_queue(netdev); |
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netif_carrier_off(netdev); |
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} |
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} |
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static void ks8842_enable_tx(struct ks8842_adapter *adapter) |
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{ |
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ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR); |
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} |
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static void ks8842_disable_tx(struct ks8842_adapter *adapter) |
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{ |
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ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR); |
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} |
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static void ks8842_enable_rx(struct ks8842_adapter *adapter) |
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{ |
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ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR); |
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} |
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static void ks8842_disable_rx(struct ks8842_adapter *adapter) |
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{ |
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ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR); |
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} |
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static void ks8842_reset_hw(struct ks8842_adapter *adapter) |
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{ |
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/* reset the HW */ |
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ks8842_reset(adapter); |
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/* Enable QMU Transmit flow control / transmit padding / Transmit CRC */ |
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ks8842_write16(adapter, 16, 0x000E, REG_TXCR); |
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/* enable the receiver, uni + multi + broadcast + flow ctrl |
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+ crc strip */ |
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ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400, |
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REG_RXCR); |
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/* TX frame pointer autoincrement */ |
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ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR); |
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/* RX frame pointer autoincrement */ |
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ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR); |
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/* RX 2 kb high watermark */ |
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ks8842_write16(adapter, 0, 0x1000, REG_QRFCR); |
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/* aggressive back off in half duplex */ |
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ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1); |
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/* enable no excessive collison drop */ |
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ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2); |
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/* Enable port 1 force flow control / back pressure / transmit / recv */ |
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ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2); |
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/* restart port auto-negotiation */ |
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ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4); |
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/* Enable the transmitter */ |
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ks8842_enable_tx(adapter); |
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/* Enable the receiver */ |
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ks8842_enable_rx(adapter); |
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/* clear all interrupts */ |
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ks8842_write16(adapter, 18, 0xffff, REG_ISR); |
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/* enable interrupts */ |
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if (KS8842_USE_DMA(adapter)) { |
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/* When running in DMA Mode the RX interrupt is not enabled in |
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timberdale because RX data is received by DMA callbacks |
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it must still be enabled in the KS8842 because it indicates |
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to timberdale when there is RX data for it's DMA FIFOs */ |
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iowrite16(ENABLED_IRQS_DMA_IP, adapter->hw_addr + REG_TIMB_IER); |
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ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER); |
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} else { |
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if (!(adapter->conf_flags & MICREL_KS884X)) |
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iowrite16(ENABLED_IRQS, |
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adapter->hw_addr + REG_TIMB_IER); |
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ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); |
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} |
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/* enable the switch */ |
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ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE); |
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} |
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static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest) |
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{ |
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int i; |
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u16 mac; |
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for (i = 0; i < ETH_ALEN; i++) |
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dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i); |
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if (adapter->conf_flags & MICREL_KS884X) { |
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/* |
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the sequence of saving mac addr between MAC and Switch is |
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different. |
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*/ |
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mac = ks8842_read16(adapter, 2, REG_MARL); |
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ks8842_write16(adapter, 39, mac, REG_MACAR3); |
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mac = ks8842_read16(adapter, 2, REG_MARM); |
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ks8842_write16(adapter, 39, mac, REG_MACAR2); |
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mac = ks8842_read16(adapter, 2, REG_MARH); |
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ks8842_write16(adapter, 39, mac, REG_MACAR1); |
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} else { |
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/* make sure the switch port uses the same MAC as the QMU */ |
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mac = ks8842_read16(adapter, 2, REG_MARL); |
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ks8842_write16(adapter, 39, mac, REG_MACAR1); |
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mac = ks8842_read16(adapter, 2, REG_MARM); |
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ks8842_write16(adapter, 39, mac, REG_MACAR2); |
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mac = ks8842_read16(adapter, 2, REG_MARH); |
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ks8842_write16(adapter, 39, mac, REG_MACAR3); |
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} |
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} |
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static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac) |
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{ |
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unsigned long flags; |
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unsigned i; |
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spin_lock_irqsave(&adapter->lock, flags); |
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for (i = 0; i < ETH_ALEN; i++) { |
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ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i); |
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if (!(adapter->conf_flags & MICREL_KS884X)) |
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ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1], |
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REG_MACAR1 + i); |
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} |
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if (adapter->conf_flags & MICREL_KS884X) { |
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/* |
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the sequence of saving mac addr between MAC and Switch is |
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different. |
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*/ |
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u16 mac; |
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mac = ks8842_read16(adapter, 2, REG_MARL); |
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ks8842_write16(adapter, 39, mac, REG_MACAR3); |
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mac = ks8842_read16(adapter, 2, REG_MARM); |
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ks8842_write16(adapter, 39, mac, REG_MACAR2); |
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mac = ks8842_read16(adapter, 2, REG_MARH); |
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ks8842_write16(adapter, 39, mac, REG_MACAR1); |
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} |
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spin_unlock_irqrestore(&adapter->lock, flags); |
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} |
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static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter) |
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{ |
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return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff; |
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} |
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static int ks8842_tx_frame_dma(struct sk_buff *skb, struct net_device *netdev) |
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{ |
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struct ks8842_adapter *adapter = netdev_priv(netdev); |
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struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx; |
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u8 *buf = ctl->buf; |
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|
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if (ctl->adesc) { |
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netdev_dbg(netdev, "%s: TX ongoing\n", __func__); |
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/* transfer ongoing */ |
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return NETDEV_TX_BUSY; |
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} |
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sg_dma_len(&ctl->sg) = skb->len + sizeof(u32); |
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|
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/* copy data to the TX buffer */ |
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/* the control word, enable IRQ, port 1 and the length */ |
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*buf++ = 0x00; |
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*buf++ = 0x01; /* Port 1 */ |
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*buf++ = skb->len & 0xff; |
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*buf++ = (skb->len >> 8) & 0xff; |
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skb_copy_from_linear_data(skb, buf, skb->len); |
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|
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dma_sync_single_range_for_device(adapter->dev, |
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sg_dma_address(&ctl->sg), 0, sg_dma_len(&ctl->sg), |
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DMA_TO_DEVICE); |
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|
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/* make sure the length is a multiple of 4 */ |
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if (sg_dma_len(&ctl->sg) % 4) |
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sg_dma_len(&ctl->sg) += 4 - sg_dma_len(&ctl->sg) % 4; |
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|
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ctl->adesc = dmaengine_prep_slave_sg(ctl->chan, |
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&ctl->sg, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT); |
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if (!ctl->adesc) |
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return NETDEV_TX_BUSY; |
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|
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ctl->adesc->callback_param = netdev; |
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ctl->adesc->callback = ks8842_dma_tx_cb; |
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ctl->adesc->tx_submit(ctl->adesc); |
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|
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netdev->stats.tx_bytes += skb->len; |
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|
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dev_kfree_skb(skb); |
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|
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return NETDEV_TX_OK; |
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} |
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static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev) |
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{ |
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struct ks8842_adapter *adapter = netdev_priv(netdev); |
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int len = skb->len; |
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|
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netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n", |
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__func__, skb->len, skb->head, skb->data, |
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skb_tail_pointer(skb), skb_end_pointer(skb)); |
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|
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/* check FIFO buffer space, we need space for CRC and command bits */ |
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if (ks8842_tx_fifo_space(adapter) < len + 8) |
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return NETDEV_TX_BUSY; |
|
|
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if (adapter->conf_flags & KS884X_16BIT) { |
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u16 *ptr16 = (u16 *)skb->data; |
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ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO); |
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ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI); |
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netdev->stats.tx_bytes += len; |
|
|
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/* copy buffer */ |
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while (len > 0) { |
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iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO); |
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iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI); |
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len -= sizeof(u32); |
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} |
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} else { |
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|
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u32 *ptr = (u32 *)skb->data; |
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u32 ctrl; |
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/* the control word, enable IRQ, port 1 and the length */ |
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ctrl = 0x8000 | 0x100 | (len << 16); |
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ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO); |
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|
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netdev->stats.tx_bytes += len; |
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|
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/* copy buffer */ |
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while (len > 0) { |
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iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO); |
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len -= sizeof(u32); |
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ptr++; |
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} |
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} |
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|
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/* enqueue packet */ |
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ks8842_write16(adapter, 17, 1, REG_TXQCR); |
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|
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dev_kfree_skb(skb); |
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|
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return NETDEV_TX_OK; |
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} |
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|
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static void ks8842_update_rx_err_counters(struct net_device *netdev, u32 status) |
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{ |
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netdev_dbg(netdev, "RX error, status: %x\n", status); |
|
|
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netdev->stats.rx_errors++; |
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if (status & RXSR_TOO_LONG) |
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netdev->stats.rx_length_errors++; |
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if (status & RXSR_CRC_ERROR) |
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netdev->stats.rx_crc_errors++; |
|
if (status & RXSR_RUNT) |
|
netdev->stats.rx_frame_errors++; |
|
} |
|
|
|
static void ks8842_update_rx_counters(struct net_device *netdev, u32 status, |
|
int len) |
|
{ |
|
netdev_dbg(netdev, "RX packet, len: %d\n", len); |
|
|
|
netdev->stats.rx_packets++; |
|
netdev->stats.rx_bytes += len; |
|
if (status & RXSR_MULTICAST) |
|
netdev->stats.multicast++; |
|
} |
|
|
|
static int __ks8842_start_new_rx_dma(struct net_device *netdev) |
|
{ |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx; |
|
struct scatterlist *sg = &ctl->sg; |
|
int err; |
|
|
|
ctl->skb = netdev_alloc_skb(netdev, DMA_BUFFER_SIZE); |
|
if (ctl->skb) { |
|
sg_init_table(sg, 1); |
|
sg_dma_address(sg) = dma_map_single(adapter->dev, |
|
ctl->skb->data, DMA_BUFFER_SIZE, DMA_FROM_DEVICE); |
|
if (dma_mapping_error(adapter->dev, sg_dma_address(sg))) { |
|
err = -ENOMEM; |
|
sg_dma_address(sg) = 0; |
|
goto out; |
|
} |
|
|
|
sg_dma_len(sg) = DMA_BUFFER_SIZE; |
|
|
|
ctl->adesc = dmaengine_prep_slave_sg(ctl->chan, |
|
sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT); |
|
|
|
if (!ctl->adesc) { |
|
err = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
ctl->adesc->callback_param = netdev; |
|
ctl->adesc->callback = ks8842_dma_rx_cb; |
|
ctl->adesc->tx_submit(ctl->adesc); |
|
} else { |
|
err = -ENOMEM; |
|
sg_dma_address(sg) = 0; |
|
goto out; |
|
} |
|
|
|
return 0; |
|
out: |
|
if (sg_dma_address(sg)) |
|
dma_unmap_single(adapter->dev, sg_dma_address(sg), |
|
DMA_BUFFER_SIZE, DMA_FROM_DEVICE); |
|
sg_dma_address(sg) = 0; |
|
dev_kfree_skb(ctl->skb); |
|
ctl->skb = NULL; |
|
|
|
printk(KERN_ERR DRV_NAME": Failed to start RX DMA: %d\n", err); |
|
return err; |
|
} |
|
|
|
static void ks8842_rx_frame_dma_tasklet(struct tasklet_struct *t) |
|
{ |
|
struct ks8842_adapter *adapter = from_tasklet(adapter, t, dma_rx.tasklet); |
|
struct net_device *netdev = adapter->netdev; |
|
struct ks8842_rx_dma_ctl *ctl = &adapter->dma_rx; |
|
struct sk_buff *skb = ctl->skb; |
|
dma_addr_t addr = sg_dma_address(&ctl->sg); |
|
u32 status; |
|
|
|
ctl->adesc = NULL; |
|
|
|
/* kick next transfer going */ |
|
__ks8842_start_new_rx_dma(netdev); |
|
|
|
/* now handle the data we got */ |
|
dma_unmap_single(adapter->dev, addr, DMA_BUFFER_SIZE, DMA_FROM_DEVICE); |
|
|
|
status = *((u32 *)skb->data); |
|
|
|
netdev_dbg(netdev, "%s - rx_data: status: %x\n", |
|
__func__, status & 0xffff); |
|
|
|
/* check the status */ |
|
if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) { |
|
int len = (status >> 16) & 0x7ff; |
|
|
|
ks8842_update_rx_counters(netdev, status, len); |
|
|
|
/* reserve 4 bytes which is the status word */ |
|
skb_reserve(skb, 4); |
|
skb_put(skb, len); |
|
|
|
skb->protocol = eth_type_trans(skb, netdev); |
|
netif_rx(skb); |
|
} else { |
|
ks8842_update_rx_err_counters(netdev, status); |
|
dev_kfree_skb(skb); |
|
} |
|
} |
|
|
|
static void ks8842_rx_frame(struct net_device *netdev, |
|
struct ks8842_adapter *adapter) |
|
{ |
|
u32 status; |
|
int len; |
|
|
|
if (adapter->conf_flags & KS884X_16BIT) { |
|
status = ks8842_read16(adapter, 17, REG_QMU_DATA_LO); |
|
len = ks8842_read16(adapter, 17, REG_QMU_DATA_HI); |
|
netdev_dbg(netdev, "%s - rx_data: status: %x\n", |
|
__func__, status); |
|
} 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)) { |
|
struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len + 3); |
|
|
|
if (skb) { |
|
|
|
ks8842_update_rx_counters(netdev, status, len); |
|
|
|
if (adapter->conf_flags & KS884X_16BIT) { |
|
u16 *data16 = 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 = 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 |
|
netdev->stats.rx_dropped++; |
|
} else |
|
ks8842_update_rx_err_counters(netdev, status); |
|
|
|
/* set high watermark to 3K */ |
|
ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR); |
|
|
|
/* release the frame */ |
|
ks8842_write16(adapter, 17, 0x01, REG_RXQCR); |
|
|
|
/* set high watermark to 2K */ |
|
ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR); |
|
} |
|
|
|
static void ks8842_handle_rx(struct net_device *netdev, |
|
struct ks8842_adapter *adapter) |
|
{ |
|
u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; |
|
netdev_dbg(netdev, "%s Entry - rx_data: %d\n", __func__, rx_data); |
|
while (rx_data) { |
|
ks8842_rx_frame(netdev, adapter); |
|
rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff; |
|
} |
|
} |
|
|
|
static void ks8842_handle_tx(struct net_device *netdev, |
|
struct ks8842_adapter *adapter) |
|
{ |
|
u16 sr = ks8842_read16(adapter, 16, REG_TXSR); |
|
netdev_dbg(netdev, "%s - entry, sr: %x\n", __func__, sr); |
|
netdev->stats.tx_packets++; |
|
if (netif_queue_stopped(netdev)) |
|
netif_wake_queue(netdev); |
|
} |
|
|
|
static void ks8842_handle_rx_overrun(struct net_device *netdev, |
|
struct ks8842_adapter *adapter) |
|
{ |
|
netdev_dbg(netdev, "%s: entry\n", __func__); |
|
netdev->stats.rx_errors++; |
|
netdev->stats.rx_fifo_errors++; |
|
} |
|
|
|
static void ks8842_tasklet(struct tasklet_struct *t) |
|
{ |
|
struct ks8842_adapter *adapter = from_tasklet(adapter, t, tasklet); |
|
struct net_device *netdev = adapter->netdev; |
|
u16 isr; |
|
unsigned long flags; |
|
u16 entry_bank; |
|
|
|
/* read current bank to be able to set it back */ |
|
spin_lock_irqsave(&adapter->lock, flags); |
|
entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); |
|
spin_unlock_irqrestore(&adapter->lock, flags); |
|
|
|
isr = ks8842_read16(adapter, 18, REG_ISR); |
|
netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); |
|
|
|
/* when running in DMA mode, do not ack RX interrupts, it is handled |
|
internally by timberdale, otherwise it's DMA FIFO:s would stop |
|
*/ |
|
if (KS8842_USE_DMA(adapter)) |
|
isr &= ~IRQ_RX; |
|
|
|
/* Ack */ |
|
ks8842_write16(adapter, 18, isr, REG_ISR); |
|
|
|
if (!(adapter->conf_flags & MICREL_KS884X)) |
|
/* Ack in the timberdale IP as well */ |
|
iowrite32(0x1, adapter->hw_addr + REG_TIMB_IAR); |
|
|
|
if (!netif_running(netdev)) |
|
return; |
|
|
|
if (isr & IRQ_LINK_CHANGE) |
|
ks8842_update_link_status(netdev, adapter); |
|
|
|
/* should not get IRQ_RX when running DMA mode */ |
|
if (isr & (IRQ_RX | IRQ_RX_ERROR) && !KS8842_USE_DMA(adapter)) |
|
ks8842_handle_rx(netdev, adapter); |
|
|
|
/* should only happen when in PIO mode */ |
|
if (isr & IRQ_TX) |
|
ks8842_handle_tx(netdev, adapter); |
|
|
|
if (isr & IRQ_RX_OVERRUN) |
|
ks8842_handle_rx_overrun(netdev, adapter); |
|
|
|
if (isr & IRQ_TX_STOPPED) { |
|
ks8842_disable_tx(adapter); |
|
ks8842_enable_tx(adapter); |
|
} |
|
|
|
if (isr & IRQ_RX_STOPPED) { |
|
ks8842_disable_rx(adapter); |
|
ks8842_enable_rx(adapter); |
|
} |
|
|
|
/* re-enable interrupts, put back the bank selection register */ |
|
spin_lock_irqsave(&adapter->lock, flags); |
|
if (KS8842_USE_DMA(adapter)) |
|
ks8842_write16(adapter, 18, ENABLED_IRQS_DMA, REG_IER); |
|
else |
|
ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER); |
|
iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); |
|
|
|
/* Make sure timberdale continues DMA operations, they are stopped while |
|
we are handling the ks8842 because we might change bank */ |
|
if (KS8842_USE_DMA(adapter)) |
|
ks8842_resume_dma(adapter); |
|
|
|
spin_unlock_irqrestore(&adapter->lock, flags); |
|
} |
|
|
|
static irqreturn_t ks8842_irq(int irq, void *devid) |
|
{ |
|
struct net_device *netdev = devid; |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
u16 isr; |
|
u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK); |
|
irqreturn_t ret = IRQ_NONE; |
|
|
|
isr = ks8842_read16(adapter, 18, REG_ISR); |
|
netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr); |
|
|
|
if (isr) { |
|
if (KS8842_USE_DMA(adapter)) |
|
/* disable all but RX IRQ, since the FPGA relies on it*/ |
|
ks8842_write16(adapter, 18, IRQ_RX, REG_IER); |
|
else |
|
/* disable IRQ */ |
|
ks8842_write16(adapter, 18, 0x00, REG_IER); |
|
|
|
/* schedule tasklet */ |
|
tasklet_schedule(&adapter->tasklet); |
|
|
|
ret = IRQ_HANDLED; |
|
} |
|
|
|
iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK); |
|
|
|
/* After an interrupt, tell timberdale to continue DMA operations. |
|
DMA is disabled while we are handling the ks8842 because we might |
|
change bank */ |
|
ks8842_resume_dma(adapter); |
|
|
|
return ret; |
|
} |
|
|
|
static void ks8842_dma_rx_cb(void *data) |
|
{ |
|
struct net_device *netdev = data; |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
|
|
netdev_dbg(netdev, "RX DMA finished\n"); |
|
/* schedule tasklet */ |
|
if (adapter->dma_rx.adesc) |
|
tasklet_schedule(&adapter->dma_rx.tasklet); |
|
} |
|
|
|
static void ks8842_dma_tx_cb(void *data) |
|
{ |
|
struct net_device *netdev = data; |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
struct ks8842_tx_dma_ctl *ctl = &adapter->dma_tx; |
|
|
|
netdev_dbg(netdev, "TX DMA finished\n"); |
|
|
|
if (!ctl->adesc) |
|
return; |
|
|
|
netdev->stats.tx_packets++; |
|
ctl->adesc = NULL; |
|
|
|
if (netif_queue_stopped(netdev)) |
|
netif_wake_queue(netdev); |
|
} |
|
|
|
static void ks8842_stop_dma(struct ks8842_adapter *adapter) |
|
{ |
|
struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; |
|
struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; |
|
|
|
tx_ctl->adesc = NULL; |
|
if (tx_ctl->chan) |
|
dmaengine_terminate_all(tx_ctl->chan); |
|
|
|
rx_ctl->adesc = NULL; |
|
if (rx_ctl->chan) |
|
dmaengine_terminate_all(rx_ctl->chan); |
|
|
|
if (sg_dma_address(&rx_ctl->sg)) |
|
dma_unmap_single(adapter->dev, sg_dma_address(&rx_ctl->sg), |
|
DMA_BUFFER_SIZE, DMA_FROM_DEVICE); |
|
sg_dma_address(&rx_ctl->sg) = 0; |
|
|
|
dev_kfree_skb(rx_ctl->skb); |
|
rx_ctl->skb = NULL; |
|
} |
|
|
|
static void ks8842_dealloc_dma_bufs(struct ks8842_adapter *adapter) |
|
{ |
|
struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; |
|
struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; |
|
|
|
ks8842_stop_dma(adapter); |
|
|
|
if (tx_ctl->chan) |
|
dma_release_channel(tx_ctl->chan); |
|
tx_ctl->chan = NULL; |
|
|
|
if (rx_ctl->chan) |
|
dma_release_channel(rx_ctl->chan); |
|
rx_ctl->chan = NULL; |
|
|
|
tasklet_kill(&rx_ctl->tasklet); |
|
|
|
if (sg_dma_address(&tx_ctl->sg)) |
|
dma_unmap_single(adapter->dev, sg_dma_address(&tx_ctl->sg), |
|
DMA_BUFFER_SIZE, DMA_TO_DEVICE); |
|
sg_dma_address(&tx_ctl->sg) = 0; |
|
|
|
kfree(tx_ctl->buf); |
|
tx_ctl->buf = NULL; |
|
} |
|
|
|
static bool ks8842_dma_filter_fn(struct dma_chan *chan, void *filter_param) |
|
{ |
|
return chan->chan_id == (long)filter_param; |
|
} |
|
|
|
static int ks8842_alloc_dma_bufs(struct net_device *netdev) |
|
{ |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
struct ks8842_tx_dma_ctl *tx_ctl = &adapter->dma_tx; |
|
struct ks8842_rx_dma_ctl *rx_ctl = &adapter->dma_rx; |
|
int err; |
|
|
|
dma_cap_mask_t mask; |
|
|
|
dma_cap_zero(mask); |
|
dma_cap_set(DMA_SLAVE, mask); |
|
dma_cap_set(DMA_PRIVATE, mask); |
|
|
|
sg_init_table(&tx_ctl->sg, 1); |
|
|
|
tx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn, |
|
(void *)(long)tx_ctl->channel); |
|
if (!tx_ctl->chan) { |
|
err = -ENODEV; |
|
goto err; |
|
} |
|
|
|
/* allocate DMA buffer */ |
|
tx_ctl->buf = kmalloc(DMA_BUFFER_SIZE, GFP_KERNEL); |
|
if (!tx_ctl->buf) { |
|
err = -ENOMEM; |
|
goto err; |
|
} |
|
|
|
sg_dma_address(&tx_ctl->sg) = dma_map_single(adapter->dev, |
|
tx_ctl->buf, DMA_BUFFER_SIZE, DMA_TO_DEVICE); |
|
if (dma_mapping_error(adapter->dev, sg_dma_address(&tx_ctl->sg))) { |
|
err = -ENOMEM; |
|
sg_dma_address(&tx_ctl->sg) = 0; |
|
goto err; |
|
} |
|
|
|
rx_ctl->chan = dma_request_channel(mask, ks8842_dma_filter_fn, |
|
(void *)(long)rx_ctl->channel); |
|
if (!rx_ctl->chan) { |
|
err = -ENODEV; |
|
goto err; |
|
} |
|
|
|
tasklet_setup(&rx_ctl->tasklet, ks8842_rx_frame_dma_tasklet); |
|
|
|
return 0; |
|
err: |
|
ks8842_dealloc_dma_bufs(adapter); |
|
return err; |
|
} |
|
|
|
/* Netdevice operations */ |
|
|
|
static int ks8842_open(struct net_device *netdev) |
|
{ |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
int err; |
|
|
|
netdev_dbg(netdev, "%s - entry\n", __func__); |
|
|
|
if (KS8842_USE_DMA(adapter)) { |
|
err = ks8842_alloc_dma_bufs(netdev); |
|
|
|
if (!err) { |
|
/* start RX dma */ |
|
err = __ks8842_start_new_rx_dma(netdev); |
|
if (err) |
|
ks8842_dealloc_dma_bufs(adapter); |
|
} |
|
|
|
if (err) { |
|
printk(KERN_WARNING DRV_NAME |
|
": Failed to initiate DMA, running PIO\n"); |
|
ks8842_dealloc_dma_bufs(adapter); |
|
adapter->dma_rx.channel = -1; |
|
adapter->dma_tx.channel = -1; |
|
} |
|
} |
|
|
|
/* reset the HW */ |
|
ks8842_reset_hw(adapter); |
|
|
|
ks8842_write_mac_addr(adapter, netdev->dev_addr); |
|
|
|
ks8842_update_link_status(netdev, adapter); |
|
|
|
err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME, |
|
netdev); |
|
if (err) { |
|
pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ks8842_close(struct net_device *netdev) |
|
{ |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
|
|
netdev_dbg(netdev, "%s - entry\n", __func__); |
|
|
|
cancel_work_sync(&adapter->timeout_work); |
|
|
|
if (KS8842_USE_DMA(adapter)) |
|
ks8842_dealloc_dma_bufs(adapter); |
|
|
|
/* free the irq */ |
|
free_irq(adapter->irq, netdev); |
|
|
|
/* disable the switch */ |
|
ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE); |
|
|
|
return 0; |
|
} |
|
|
|
static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb, |
|
struct net_device *netdev) |
|
{ |
|
int ret; |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
|
|
netdev_dbg(netdev, "%s: entry\n", __func__); |
|
|
|
if (KS8842_USE_DMA(adapter)) { |
|
unsigned long flags; |
|
ret = ks8842_tx_frame_dma(skb, netdev); |
|
/* for now only allow one transfer at the time */ |
|
spin_lock_irqsave(&adapter->lock, flags); |
|
if (adapter->dma_tx.adesc) |
|
netif_stop_queue(netdev); |
|
spin_unlock_irqrestore(&adapter->lock, flags); |
|
return ret; |
|
} |
|
|
|
ret = ks8842_tx_frame(skb, netdev); |
|
|
|
if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8) |
|
netif_stop_queue(netdev); |
|
|
|
return ret; |
|
} |
|
|
|
static int ks8842_set_mac(struct net_device *netdev, void *p) |
|
{ |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
struct sockaddr *addr = p; |
|
char *mac = (u8 *)addr->sa_data; |
|
|
|
netdev_dbg(netdev, "%s: entry\n", __func__); |
|
|
|
if (!is_valid_ether_addr(addr->sa_data)) |
|
return -EADDRNOTAVAIL; |
|
|
|
memcpy(netdev->dev_addr, mac, netdev->addr_len); |
|
|
|
ks8842_write_mac_addr(adapter, mac); |
|
return 0; |
|
} |
|
|
|
static void ks8842_tx_timeout_work(struct work_struct *work) |
|
{ |
|
struct ks8842_adapter *adapter = |
|
container_of(work, struct ks8842_adapter, timeout_work); |
|
struct net_device *netdev = adapter->netdev; |
|
unsigned long flags; |
|
|
|
netdev_dbg(netdev, "%s: entry\n", __func__); |
|
|
|
spin_lock_irqsave(&adapter->lock, flags); |
|
|
|
if (KS8842_USE_DMA(adapter)) |
|
ks8842_stop_dma(adapter); |
|
|
|
/* disable interrupts */ |
|
ks8842_write16(adapter, 18, 0, REG_IER); |
|
ks8842_write16(adapter, 18, 0xFFFF, REG_ISR); |
|
|
|
netif_stop_queue(netdev); |
|
|
|
spin_unlock_irqrestore(&adapter->lock, flags); |
|
|
|
ks8842_reset_hw(adapter); |
|
|
|
ks8842_write_mac_addr(adapter, netdev->dev_addr); |
|
|
|
ks8842_update_link_status(netdev, adapter); |
|
|
|
if (KS8842_USE_DMA(adapter)) |
|
__ks8842_start_new_rx_dma(netdev); |
|
} |
|
|
|
static void ks8842_tx_timeout(struct net_device *netdev, unsigned int txqueue) |
|
{ |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
|
|
netdev_dbg(netdev, "%s: entry\n", __func__); |
|
|
|
schedule_work(&adapter->timeout_work); |
|
} |
|
|
|
static const struct net_device_ops ks8842_netdev_ops = { |
|
.ndo_open = ks8842_open, |
|
.ndo_stop = ks8842_close, |
|
.ndo_start_xmit = ks8842_xmit_frame, |
|
.ndo_set_mac_address = ks8842_set_mac, |
|
.ndo_tx_timeout = ks8842_tx_timeout, |
|
.ndo_validate_addr = eth_validate_addr |
|
}; |
|
|
|
static const struct ethtool_ops ks8842_ethtool_ops = { |
|
.get_link = ethtool_op_get_link, |
|
}; |
|
|
|
static int ks8842_probe(struct platform_device *pdev) |
|
{ |
|
int err = -ENOMEM; |
|
struct resource *iomem; |
|
struct net_device *netdev; |
|
struct ks8842_adapter *adapter; |
|
struct ks8842_platform_data *pdata = dev_get_platdata(&pdev->dev); |
|
u16 id; |
|
unsigned i; |
|
|
|
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
|
if (!iomem) { |
|
dev_err(&pdev->dev, "Invalid resource\n"); |
|
return -EINVAL; |
|
} |
|
if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) |
|
goto err_mem_region; |
|
|
|
netdev = alloc_etherdev(sizeof(struct ks8842_adapter)); |
|
if (!netdev) |
|
goto err_alloc_etherdev; |
|
|
|
SET_NETDEV_DEV(netdev, &pdev->dev); |
|
|
|
adapter = netdev_priv(netdev); |
|
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; |
|
|
|
adapter->irq = platform_get_irq(pdev, 0); |
|
if (adapter->irq < 0) { |
|
err = adapter->irq; |
|
goto err_get_irq; |
|
} |
|
|
|
adapter->dev = (pdev->dev.parent) ? pdev->dev.parent : &pdev->dev; |
|
|
|
/* DMA is only supported when accessed via timberdale */ |
|
if (!(adapter->conf_flags & MICREL_KS884X) && pdata && |
|
(pdata->tx_dma_channel != -1) && |
|
(pdata->rx_dma_channel != -1)) { |
|
adapter->dma_rx.channel = pdata->rx_dma_channel; |
|
adapter->dma_tx.channel = pdata->tx_dma_channel; |
|
} else { |
|
adapter->dma_rx.channel = -1; |
|
adapter->dma_tx.channel = -1; |
|
} |
|
|
|
tasklet_setup(&adapter->tasklet, ks8842_tasklet); |
|
spin_lock_init(&adapter->lock); |
|
|
|
netdev->netdev_ops = &ks8842_netdev_ops; |
|
netdev->ethtool_ops = &ks8842_ethtool_ops; |
|
|
|
/* Check if a mac address was given */ |
|
i = netdev->addr_len; |
|
if (pdata) { |
|
for (i = 0; i < netdev->addr_len; i++) |
|
if (pdata->macaddr[i] != 0) |
|
break; |
|
|
|
if (i < netdev->addr_len) |
|
/* an address was passed, use it */ |
|
memcpy(netdev->dev_addr, pdata->macaddr, |
|
netdev->addr_len); |
|
} |
|
|
|
if (i == netdev->addr_len) { |
|
ks8842_read_mac_addr(adapter, netdev->dev_addr); |
|
|
|
if (!is_valid_ether_addr(netdev->dev_addr)) |
|
eth_hw_addr_random(netdev); |
|
} |
|
|
|
id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE); |
|
|
|
strcpy(netdev->name, "eth%d"); |
|
err = register_netdev(netdev); |
|
if (err) |
|
goto err_register; |
|
|
|
platform_set_drvdata(pdev, netdev); |
|
|
|
pr_info("Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n", |
|
(id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7); |
|
|
|
return 0; |
|
|
|
err_register: |
|
err_get_irq: |
|
iounmap(adapter->hw_addr); |
|
err_ioremap: |
|
free_netdev(netdev); |
|
err_alloc_etherdev: |
|
release_mem_region(iomem->start, resource_size(iomem)); |
|
err_mem_region: |
|
return err; |
|
} |
|
|
|
static int ks8842_remove(struct platform_device *pdev) |
|
{ |
|
struct net_device *netdev = platform_get_drvdata(pdev); |
|
struct ks8842_adapter *adapter = netdev_priv(netdev); |
|
struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
|
|
|
unregister_netdev(netdev); |
|
tasklet_kill(&adapter->tasklet); |
|
iounmap(adapter->hw_addr); |
|
free_netdev(netdev); |
|
release_mem_region(iomem->start, resource_size(iomem)); |
|
return 0; |
|
} |
|
|
|
|
|
static struct platform_driver ks8842_platform_driver = { |
|
.driver = { |
|
.name = DRV_NAME, |
|
}, |
|
.probe = ks8842_probe, |
|
.remove = ks8842_remove, |
|
}; |
|
|
|
module_platform_driver(ks8842_platform_driver); |
|
|
|
MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver"); |
|
MODULE_AUTHOR("Mocean Laboratories <[email protected]>"); |
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_ALIAS("platform:ks8842"); |
|
|
|
|