![Andres Salomon](/assets/img/avatar_default.png)
The cell's platform_data is now accessed with a helper function; change clients to use that, and remove the now-unused data_size. Note that the mfd's platform_data is marked __devinitdata. This is still correct in all cases except for the timbgpio driver, whose remove hook has been changed to no longer reference the pdata. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
1285 lines
33 KiB
C
1285 lines
33 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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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/mfd/core.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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/* 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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/* KS8842 registers */
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#define REG_SELECT_BANK 0x0e
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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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/* bank 3 registers */
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#define REG_GRR 0x06
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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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/* 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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/* 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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/* 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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/* 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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/* 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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/* 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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/* aggresive 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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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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/* 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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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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/* 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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ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
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&ctl->sg, 1, DMA_TO_DEVICE,
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DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
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if (!ctl->adesc)
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return NETDEV_TX_BUSY;
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|
ctl->adesc->callback_param = netdev;
|
|
ctl->adesc->callback = ks8842_dma_tx_cb;
|
|
ctl->adesc->tx_submit(ctl->adesc);
|
|
|
|
netdev->stats.tx_bytes += skb->len;
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev)
|
|
{
|
|
struct ks8842_adapter *adapter = netdev_priv(netdev);
|
|
int len = skb->len;
|
|
|
|
netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n",
|
|
__func__, skb->len, skb->head, skb->data,
|
|
skb_tail_pointer(skb), skb_end_pointer(skb));
|
|
|
|
/* check FIFO buffer space, we need space for CRC and command bits */
|
|
if (ks8842_tx_fifo_space(adapter) < len + 8)
|
|
return NETDEV_TX_BUSY;
|
|
|
|
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;
|
|
|
|
/* copy buffer */
|
|
while (len > 0) {
|
|
iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
|
|
len -= sizeof(u32);
|
|
ptr++;
|
|
}
|
|
}
|
|
|
|
/* enqueue packet */
|
|
ks8842_write16(adapter, 17, 1, REG_TXQCR);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static void ks8842_update_rx_err_counters(struct net_device *netdev, u32 status)
|
|
{
|
|
netdev_dbg(netdev, "RX error, status: %x\n", status);
|
|
|
|
netdev->stats.rx_errors++;
|
|
if (status & RXSR_TOO_LONG)
|
|
netdev->stats.rx_length_errors++;
|
|
if (status & RXSR_CRC_ERROR)
|
|
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);
|
|
err = dma_mapping_error(adapter->dev, sg_dma_address(sg));
|
|
if (unlikely(err)) {
|
|
sg_dma_address(sg) = 0;
|
|
goto out;
|
|
}
|
|
|
|
sg_dma_len(sg) = DMA_BUFFER_SIZE;
|
|
|
|
ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
|
|
sg, 1, DMA_FROM_DEVICE,
|
|
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
|
|
|
|
if (!ctl->adesc)
|
|
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 err;
|
|
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;
|
|
if (ctl->skb)
|
|
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(unsigned long arg)
|
|
{
|
|
struct net_device *netdev = (struct net_device *)arg;
|
|
struct ks8842_adapter *adapter = netdev_priv(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);
|
|
|
|
if (skb) {
|
|
|
|
ks8842_update_rx_counters(netdev, status, len);
|
|
|
|
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
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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++;
|
|
}
|
|
|
|
void ks8842_tasklet(unsigned long arg)
|
|
{
|
|
struct net_device *netdev = (struct net_device *)arg;
|
|
struct ks8842_adapter *adapter = netdev_priv(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)
|
|
tx_ctl->chan->device->device_control(tx_ctl->chan,
|
|
DMA_TERMINATE_ALL, 0);
|
|
|
|
rx_ctl->adesc = NULL;
|
|
if (rx_ctl->chan)
|
|
rx_ctl->chan->device->device_control(rx_ctl->chan,
|
|
DMA_TERMINATE_ALL, 0);
|
|
|
|
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);
|
|
err = dma_mapping_error(adapter->dev,
|
|
sg_dma_address(&tx_ctl->sg));
|
|
if (err) {
|
|
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_init(&rx_ctl->tasklet, ks8842_rx_frame_dma_tasklet,
|
|
(unsigned long)netdev);
|
|
|
|
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)
|
|
{
|
|
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 __devinit 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 = mfd_get_data(pdev);
|
|
u16 id;
|
|
unsigned i;
|
|
|
|
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
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_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev);
|
|
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))
|
|
random_ether_addr(netdev->dev_addr);
|
|
}
|
|
|
|
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 __devexit 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));
|
|
platform_set_drvdata(pdev, NULL);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct platform_driver ks8842_platform_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = ks8842_probe,
|
|
.remove = ks8842_remove,
|
|
};
|
|
|
|
static int __init ks8842_init(void)
|
|
{
|
|
return platform_driver_register(&ks8842_platform_driver);
|
|
}
|
|
|
|
static void __exit ks8842_exit(void)
|
|
{
|
|
platform_driver_unregister(&ks8842_platform_driver);
|
|
}
|
|
|
|
module_init(ks8842_init);
|
|
module_exit(ks8842_exit);
|
|
|
|
MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver");
|
|
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:ks8842");
|
|
|