![Dmitry Baryshkov](/assets/img/avatar_default.png)
is handled in board code Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
910 lines
20 KiB
C
910 lines
20 KiB
C
/*
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* linux/drivers/net/irda/pxaficp_ir.c
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*
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* Based on sa1100_ir.c by Russell King
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*
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* Changes copyright (C) 2003-2005 MontaVista Software, Inc.
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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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* Infra-red driver (SIR/FIR) for the PXA2xx embedded microprocessor
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*
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*/
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <net/irda/irda.h>
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#include <net/irda/irmod.h>
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#include <net/irda/wrapper.h>
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#include <net/irda/irda_device.h>
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#include <asm/dma.h>
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#include <asm/arch/irda.h>
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#include <asm/arch/pxa-regs.h>
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#define IrSR_RXPL_NEG_IS_ZERO (1<<4)
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#define IrSR_RXPL_POS_IS_ZERO 0x0
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#define IrSR_TXPL_NEG_IS_ZERO (1<<3)
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#define IrSR_TXPL_POS_IS_ZERO 0x0
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#define IrSR_XMODE_PULSE_1_6 (1<<2)
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#define IrSR_XMODE_PULSE_3_16 0x0
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#define IrSR_RCVEIR_IR_MODE (1<<1)
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#define IrSR_RCVEIR_UART_MODE 0x0
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#define IrSR_XMITIR_IR_MODE (1<<0)
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#define IrSR_XMITIR_UART_MODE 0x0
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#define IrSR_IR_RECEIVE_ON (\
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IrSR_RXPL_NEG_IS_ZERO | \
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IrSR_TXPL_POS_IS_ZERO | \
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IrSR_XMODE_PULSE_3_16 | \
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IrSR_RCVEIR_IR_MODE | \
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IrSR_XMITIR_UART_MODE)
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#define IrSR_IR_TRANSMIT_ON (\
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IrSR_RXPL_NEG_IS_ZERO | \
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IrSR_TXPL_POS_IS_ZERO | \
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IrSR_XMODE_PULSE_3_16 | \
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IrSR_RCVEIR_UART_MODE | \
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IrSR_XMITIR_IR_MODE)
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struct pxa_irda {
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int speed;
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int newspeed;
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unsigned long last_oscr;
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unsigned char *dma_rx_buff;
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unsigned char *dma_tx_buff;
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dma_addr_t dma_rx_buff_phy;
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dma_addr_t dma_tx_buff_phy;
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unsigned int dma_tx_buff_len;
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int txdma;
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int rxdma;
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struct net_device_stats stats;
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struct irlap_cb *irlap;
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struct qos_info qos;
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iobuff_t tx_buff;
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iobuff_t rx_buff;
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struct device *dev;
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struct pxaficp_platform_data *pdata;
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struct clk *fir_clk;
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struct clk *sir_clk;
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struct clk *cur_clk;
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};
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static inline void pxa_irda_disable_clk(struct pxa_irda *si)
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{
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if (si->cur_clk)
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clk_disable(si->cur_clk);
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si->cur_clk = NULL;
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}
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static inline void pxa_irda_enable_firclk(struct pxa_irda *si)
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{
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si->cur_clk = si->fir_clk;
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clk_enable(si->fir_clk);
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}
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static inline void pxa_irda_enable_sirclk(struct pxa_irda *si)
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{
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si->cur_clk = si->sir_clk;
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clk_enable(si->sir_clk);
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}
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#define IS_FIR(si) ((si)->speed >= 4000000)
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#define IRDA_FRAME_SIZE_LIMIT 2047
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inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)
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{
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DCSR(si->rxdma) = DCSR_NODESC;
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DSADR(si->rxdma) = __PREG(ICDR);
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DTADR(si->rxdma) = si->dma_rx_buff_phy;
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DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT;
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DCSR(si->rxdma) |= DCSR_RUN;
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}
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inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)
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{
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DCSR(si->txdma) = DCSR_NODESC;
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DSADR(si->txdma) = si->dma_tx_buff_phy;
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DTADR(si->txdma) = __PREG(ICDR);
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DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len;
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DCSR(si->txdma) |= DCSR_RUN;
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}
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/*
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* Set the IrDA communications speed.
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*/
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static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
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{
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unsigned long flags;
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unsigned int divisor;
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switch (speed) {
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case 9600: case 19200: case 38400:
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case 57600: case 115200:
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/* refer to PXA250/210 Developer's Manual 10-7 */
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/* BaudRate = 14.7456 MHz / (16*Divisor) */
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divisor = 14745600 / (16 * speed);
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local_irq_save(flags);
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if (IS_FIR(si)) {
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/* stop RX DMA */
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DCSR(si->rxdma) &= ~DCSR_RUN;
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/* disable FICP */
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ICCR0 = 0;
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pxa_irda_disable_clk(si);
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/* set board transceiver to SIR mode */
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si->pdata->transceiver_mode(si->dev, IR_SIRMODE);
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/* enable the STUART clock */
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pxa_irda_enable_sirclk(si);
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}
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/* disable STUART first */
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STIER = 0;
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/* access DLL & DLH */
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STLCR |= LCR_DLAB;
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STDLL = divisor & 0xff;
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STDLH = divisor >> 8;
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STLCR &= ~LCR_DLAB;
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si->speed = speed;
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STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
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STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
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local_irq_restore(flags);
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break;
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case 4000000:
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local_irq_save(flags);
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/* disable STUART */
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STIER = 0;
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STISR = 0;
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pxa_irda_disable_clk(si);
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/* disable FICP first */
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ICCR0 = 0;
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/* set board transceiver to FIR mode */
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si->pdata->transceiver_mode(si->dev, IR_FIRMODE);
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/* enable the FICP clock */
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pxa_irda_enable_firclk(si);
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si->speed = speed;
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pxa_irda_fir_dma_rx_start(si);
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ICCR0 = ICCR0_ITR | ICCR0_RXE;
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local_irq_restore(flags);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* SIR interrupt service routine. */
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static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct pxa_irda *si = netdev_priv(dev);
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int iir, lsr, data;
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iir = STIIR;
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switch (iir & 0x0F) {
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case 0x06: /* Receiver Line Status */
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lsr = STLSR;
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while (lsr & LSR_FIFOE) {
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data = STRBR;
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if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) {
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printk(KERN_DEBUG "pxa_ir: sir receiving error\n");
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si->stats.rx_errors++;
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if (lsr & LSR_FE)
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si->stats.rx_frame_errors++;
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if (lsr & LSR_OE)
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si->stats.rx_fifo_errors++;
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} else {
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si->stats.rx_bytes++;
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async_unwrap_char(dev, &si->stats, &si->rx_buff, data);
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}
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lsr = STLSR;
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}
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dev->last_rx = jiffies;
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si->last_oscr = OSCR;
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break;
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case 0x04: /* Received Data Available */
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/* forth through */
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case 0x0C: /* Character Timeout Indication */
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do {
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si->stats.rx_bytes++;
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async_unwrap_char(dev, &si->stats, &si->rx_buff, STRBR);
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} while (STLSR & LSR_DR);
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dev->last_rx = jiffies;
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si->last_oscr = OSCR;
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break;
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case 0x02: /* Transmit FIFO Data Request */
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while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) {
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STTHR = *si->tx_buff.data++;
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si->tx_buff.len -= 1;
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}
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if (si->tx_buff.len == 0) {
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si->stats.tx_packets++;
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si->stats.tx_bytes += si->tx_buff.data -
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si->tx_buff.head;
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/* We need to ensure that the transmitter has finished. */
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while ((STLSR & LSR_TEMT) == 0)
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cpu_relax();
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si->last_oscr = OSCR;
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/*
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* Ok, we've finished transmitting. Now enable
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* the receiver. Sometimes we get a receive IRQ
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* immediately after a transmit...
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*/
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if (si->newspeed) {
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pxa_irda_set_speed(si, si->newspeed);
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si->newspeed = 0;
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} else {
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/* enable IR Receiver, disable IR Transmitter */
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STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
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/* enable STUART and receive interrupts */
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STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
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}
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/* I'm hungry! */
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netif_wake_queue(dev);
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}
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break;
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}
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return IRQ_HANDLED;
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}
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/* FIR Receive DMA interrupt handler */
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static void pxa_irda_fir_dma_rx_irq(int channel, void *data)
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{
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int dcsr = DCSR(channel);
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DCSR(channel) = dcsr & ~DCSR_RUN;
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printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr);
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}
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/* FIR Transmit DMA interrupt handler */
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static void pxa_irda_fir_dma_tx_irq(int channel, void *data)
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{
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struct net_device *dev = data;
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struct pxa_irda *si = netdev_priv(dev);
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int dcsr;
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dcsr = DCSR(channel);
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DCSR(channel) = dcsr & ~DCSR_RUN;
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if (dcsr & DCSR_ENDINTR) {
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si->stats.tx_packets++;
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si->stats.tx_bytes += si->dma_tx_buff_len;
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} else {
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si->stats.tx_errors++;
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}
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while (ICSR1 & ICSR1_TBY)
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cpu_relax();
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si->last_oscr = OSCR;
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/*
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* HACK: It looks like the TBY bit is dropped too soon.
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* Without this delay things break.
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*/
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udelay(120);
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if (si->newspeed) {
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pxa_irda_set_speed(si, si->newspeed);
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si->newspeed = 0;
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} else {
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int i = 64;
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ICCR0 = 0;
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pxa_irda_fir_dma_rx_start(si);
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while ((ICSR1 & ICSR1_RNE) && i--)
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(void)ICDR;
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ICCR0 = ICCR0_ITR | ICCR0_RXE;
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if (i < 0)
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printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
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}
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netif_wake_queue(dev);
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}
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/* EIF(Error in FIFO/End in Frame) handler for FIR */
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static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0)
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{
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unsigned int len, stat, data;
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/* Get the current data position. */
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len = DTADR(si->rxdma) - si->dma_rx_buff_phy;
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do {
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/* Read Status, and then Data. */
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stat = ICSR1;
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rmb();
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data = ICDR;
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if (stat & (ICSR1_CRE | ICSR1_ROR)) {
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si->stats.rx_errors++;
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if (stat & ICSR1_CRE) {
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printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n");
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si->stats.rx_crc_errors++;
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}
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if (stat & ICSR1_ROR) {
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printk(KERN_DEBUG "pxa_ir: fir receive overrun\n");
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si->stats.rx_over_errors++;
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}
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} else {
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si->dma_rx_buff[len++] = data;
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}
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/* If we hit the end of frame, there's no point in continuing. */
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if (stat & ICSR1_EOF)
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break;
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} while (ICSR0 & ICSR0_EIF);
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if (stat & ICSR1_EOF) {
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/* end of frame. */
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struct sk_buff *skb;
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if (icsr0 & ICSR0_FRE) {
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printk(KERN_ERR "pxa_ir: dropping erroneous frame\n");
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si->stats.rx_dropped++;
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return;
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}
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skb = alloc_skb(len+1,GFP_ATOMIC);
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if (!skb) {
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printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n");
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si->stats.rx_dropped++;
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return;
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}
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/* Align IP header to 20 bytes */
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skb_reserve(skb, 1);
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skb_copy_to_linear_data(skb, si->dma_rx_buff, len);
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skb_put(skb, len);
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/* Feed it to IrLAP */
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skb->dev = dev;
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skb_reset_mac_header(skb);
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skb->protocol = htons(ETH_P_IRDA);
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netif_rx(skb);
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si->stats.rx_packets++;
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si->stats.rx_bytes += len;
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dev->last_rx = jiffies;
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}
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}
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/* FIR interrupt handler */
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static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct pxa_irda *si = netdev_priv(dev);
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int icsr0, i = 64;
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/* stop RX DMA */
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DCSR(si->rxdma) &= ~DCSR_RUN;
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si->last_oscr = OSCR;
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icsr0 = ICSR0;
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if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) {
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if (icsr0 & ICSR0_FRE) {
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printk(KERN_DEBUG "pxa_ir: fir receive frame error\n");
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si->stats.rx_frame_errors++;
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} else {
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printk(KERN_DEBUG "pxa_ir: fir receive abort\n");
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si->stats.rx_errors++;
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}
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ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB);
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}
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if (icsr0 & ICSR0_EIF) {
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/* An error in FIFO occured, or there is a end of frame */
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pxa_irda_fir_irq_eif(si, dev, icsr0);
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}
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ICCR0 = 0;
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pxa_irda_fir_dma_rx_start(si);
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while ((ICSR1 & ICSR1_RNE) && i--)
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(void)ICDR;
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ICCR0 = ICCR0_ITR | ICCR0_RXE;
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if (i < 0)
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printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
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return IRQ_HANDLED;
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}
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/* hard_xmit interface of irda device */
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static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct pxa_irda *si = netdev_priv(dev);
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int speed = irda_get_next_speed(skb);
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/*
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* Does this packet contain a request to change the interface
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* speed? If so, remember it until we complete the transmission
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* of this frame.
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*/
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if (speed != si->speed && speed != -1)
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si->newspeed = speed;
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/*
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* If this is an empty frame, we can bypass a lot.
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*/
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if (skb->len == 0) {
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if (si->newspeed) {
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si->newspeed = 0;
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pxa_irda_set_speed(si, speed);
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}
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dev_kfree_skb(skb);
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return 0;
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}
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netif_stop_queue(dev);
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if (!IS_FIR(si)) {
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si->tx_buff.data = si->tx_buff.head;
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si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize);
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/* Disable STUART interrupts and switch to transmit mode. */
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STIER = 0;
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STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6;
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/* enable STUART and transmit interrupts */
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STIER = IER_UUE | IER_TIE;
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} else {
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unsigned long mtt = irda_get_mtt(skb);
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si->dma_tx_buff_len = skb->len;
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skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len);
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if (mtt)
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while ((unsigned)(OSCR - si->last_oscr)/4 < mtt)
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cpu_relax();
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/* stop RX DMA, disable FICP */
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DCSR(si->rxdma) &= ~DCSR_RUN;
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ICCR0 = 0;
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pxa_irda_fir_dma_tx_start(si);
|
|
ICCR0 = ICCR0_ITR | ICCR0_TXE;
|
|
}
|
|
|
|
dev_kfree_skb(skb);
|
|
dev->trans_start = jiffies;
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
|
|
{
|
|
struct if_irda_req *rq = (struct if_irda_req *)ifreq;
|
|
struct pxa_irda *si = netdev_priv(dev);
|
|
int ret;
|
|
|
|
switch (cmd) {
|
|
case SIOCSBANDWIDTH:
|
|
ret = -EPERM;
|
|
if (capable(CAP_NET_ADMIN)) {
|
|
/*
|
|
* We are unable to set the speed if the
|
|
* device is not running.
|
|
*/
|
|
if (netif_running(dev)) {
|
|
ret = pxa_irda_set_speed(si,
|
|
rq->ifr_baudrate);
|
|
} else {
|
|
printk(KERN_INFO "pxa_ir: SIOCSBANDWIDTH: !netif_running\n");
|
|
ret = 0;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SIOCSMEDIABUSY:
|
|
ret = -EPERM;
|
|
if (capable(CAP_NET_ADMIN)) {
|
|
irda_device_set_media_busy(dev, TRUE);
|
|
ret = 0;
|
|
}
|
|
break;
|
|
|
|
case SIOCGRECEIVING:
|
|
ret = 0;
|
|
rq->ifr_receiving = IS_FIR(si) ? 0
|
|
: si->rx_buff.state != OUTSIDE_FRAME;
|
|
break;
|
|
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct net_device_stats *pxa_irda_stats(struct net_device *dev)
|
|
{
|
|
struct pxa_irda *si = netdev_priv(dev);
|
|
return &si->stats;
|
|
}
|
|
|
|
static void pxa_irda_startup(struct pxa_irda *si)
|
|
{
|
|
/* Disable STUART interrupts */
|
|
STIER = 0;
|
|
/* enable STUART interrupt to the processor */
|
|
STMCR = MCR_OUT2;
|
|
/* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */
|
|
STLCR = LCR_WLS0 | LCR_WLS1;
|
|
/* enable FIFO, we use FIFO to improve performance */
|
|
STFCR = FCR_TRFIFOE | FCR_ITL_32;
|
|
|
|
/* disable FICP */
|
|
ICCR0 = 0;
|
|
/* configure FICP ICCR2 */
|
|
ICCR2 = ICCR2_TXP | ICCR2_TRIG_32;
|
|
|
|
/* configure DMAC */
|
|
DRCMR17 = si->rxdma | DRCMR_MAPVLD;
|
|
DRCMR18 = si->txdma | DRCMR_MAPVLD;
|
|
|
|
/* force SIR reinitialization */
|
|
si->speed = 4000000;
|
|
pxa_irda_set_speed(si, 9600);
|
|
|
|
printk(KERN_DEBUG "pxa_ir: irda startup\n");
|
|
}
|
|
|
|
static void pxa_irda_shutdown(struct pxa_irda *si)
|
|
{
|
|
unsigned long flags;
|
|
|
|
local_irq_save(flags);
|
|
|
|
/* disable STUART and interrupt */
|
|
STIER = 0;
|
|
/* disable STUART SIR mode */
|
|
STISR = 0;
|
|
|
|
/* disable DMA */
|
|
DCSR(si->txdma) &= ~DCSR_RUN;
|
|
DCSR(si->rxdma) &= ~DCSR_RUN;
|
|
/* disable FICP */
|
|
ICCR0 = 0;
|
|
|
|
/* disable the STUART or FICP clocks */
|
|
pxa_irda_disable_clk(si);
|
|
|
|
DRCMR17 = 0;
|
|
DRCMR18 = 0;
|
|
|
|
local_irq_restore(flags);
|
|
|
|
/* power off board transceiver */
|
|
si->pdata->transceiver_mode(si->dev, IR_OFF);
|
|
|
|
printk(KERN_DEBUG "pxa_ir: irda shutdown\n");
|
|
}
|
|
|
|
static int pxa_irda_start(struct net_device *dev)
|
|
{
|
|
struct pxa_irda *si = netdev_priv(dev);
|
|
int err;
|
|
|
|
si->speed = 9600;
|
|
|
|
err = request_irq(IRQ_STUART, pxa_irda_sir_irq, 0, dev->name, dev);
|
|
if (err)
|
|
goto err_irq1;
|
|
|
|
err = request_irq(IRQ_ICP, pxa_irda_fir_irq, 0, dev->name, dev);
|
|
if (err)
|
|
goto err_irq2;
|
|
|
|
/*
|
|
* The interrupt must remain disabled for now.
|
|
*/
|
|
disable_irq(IRQ_STUART);
|
|
disable_irq(IRQ_ICP);
|
|
|
|
err = -EBUSY;
|
|
si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev);
|
|
if (si->rxdma < 0)
|
|
goto err_rx_dma;
|
|
|
|
si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev);
|
|
if (si->txdma < 0)
|
|
goto err_tx_dma;
|
|
|
|
err = -ENOMEM;
|
|
si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
|
|
&si->dma_rx_buff_phy, GFP_KERNEL );
|
|
if (!si->dma_rx_buff)
|
|
goto err_dma_rx_buff;
|
|
|
|
si->dma_tx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
|
|
&si->dma_tx_buff_phy, GFP_KERNEL );
|
|
if (!si->dma_tx_buff)
|
|
goto err_dma_tx_buff;
|
|
|
|
/* Setup the serial port for the initial speed. */
|
|
pxa_irda_startup(si);
|
|
|
|
/*
|
|
* Open a new IrLAP layer instance.
|
|
*/
|
|
si->irlap = irlap_open(dev, &si->qos, "pxa");
|
|
err = -ENOMEM;
|
|
if (!si->irlap)
|
|
goto err_irlap;
|
|
|
|
/*
|
|
* Now enable the interrupt and start the queue
|
|
*/
|
|
enable_irq(IRQ_STUART);
|
|
enable_irq(IRQ_ICP);
|
|
netif_start_queue(dev);
|
|
|
|
printk(KERN_DEBUG "pxa_ir: irda driver opened\n");
|
|
|
|
return 0;
|
|
|
|
err_irlap:
|
|
pxa_irda_shutdown(si);
|
|
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
|
|
err_dma_tx_buff:
|
|
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
|
|
err_dma_rx_buff:
|
|
pxa_free_dma(si->txdma);
|
|
err_tx_dma:
|
|
pxa_free_dma(si->rxdma);
|
|
err_rx_dma:
|
|
free_irq(IRQ_ICP, dev);
|
|
err_irq2:
|
|
free_irq(IRQ_STUART, dev);
|
|
err_irq1:
|
|
|
|
return err;
|
|
}
|
|
|
|
static int pxa_irda_stop(struct net_device *dev)
|
|
{
|
|
struct pxa_irda *si = netdev_priv(dev);
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
pxa_irda_shutdown(si);
|
|
|
|
/* Stop IrLAP */
|
|
if (si->irlap) {
|
|
irlap_close(si->irlap);
|
|
si->irlap = NULL;
|
|
}
|
|
|
|
free_irq(IRQ_STUART, dev);
|
|
free_irq(IRQ_ICP, dev);
|
|
|
|
pxa_free_dma(si->rxdma);
|
|
pxa_free_dma(si->txdma);
|
|
|
|
if (si->dma_rx_buff)
|
|
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
|
|
if (si->dma_tx_buff)
|
|
dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
|
|
|
|
printk(KERN_DEBUG "pxa_ir: irda driver closed\n");
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_irda_suspend(struct platform_device *_dev, pm_message_t state)
|
|
{
|
|
struct net_device *dev = platform_get_drvdata(_dev);
|
|
struct pxa_irda *si;
|
|
|
|
if (dev && netif_running(dev)) {
|
|
si = netdev_priv(dev);
|
|
netif_device_detach(dev);
|
|
pxa_irda_shutdown(si);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_irda_resume(struct platform_device *_dev)
|
|
{
|
|
struct net_device *dev = platform_get_drvdata(_dev);
|
|
struct pxa_irda *si;
|
|
|
|
if (dev && netif_running(dev)) {
|
|
si = netdev_priv(dev);
|
|
pxa_irda_startup(si);
|
|
netif_device_attach(dev);
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int pxa_irda_init_iobuf(iobuff_t *io, int size)
|
|
{
|
|
io->head = kmalloc(size, GFP_KERNEL | GFP_DMA);
|
|
if (io->head != NULL) {
|
|
io->truesize = size;
|
|
io->in_frame = FALSE;
|
|
io->state = OUTSIDE_FRAME;
|
|
io->data = io->head;
|
|
}
|
|
return io->head ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int pxa_irda_probe(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev;
|
|
struct pxa_irda *si;
|
|
unsigned int baudrate_mask;
|
|
int err;
|
|
|
|
if (!pdev->dev.platform_data)
|
|
return -ENODEV;
|
|
|
|
err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY;
|
|
if (err)
|
|
goto err_mem_1;
|
|
|
|
err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY;
|
|
if (err)
|
|
goto err_mem_2;
|
|
|
|
dev = alloc_irdadev(sizeof(struct pxa_irda));
|
|
if (!dev)
|
|
goto err_mem_3;
|
|
|
|
si = netdev_priv(dev);
|
|
si->dev = &pdev->dev;
|
|
si->pdata = pdev->dev.platform_data;
|
|
|
|
si->sir_clk = clk_get(&pdev->dev, "UARTCLK");
|
|
si->fir_clk = clk_get(&pdev->dev, "FICPCLK");
|
|
if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) {
|
|
err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk);
|
|
goto err_mem_4;
|
|
}
|
|
|
|
/*
|
|
* Initialise the SIR buffers
|
|
*/
|
|
err = pxa_irda_init_iobuf(&si->rx_buff, 14384);
|
|
if (err)
|
|
goto err_mem_4;
|
|
err = pxa_irda_init_iobuf(&si->tx_buff, 4000);
|
|
if (err)
|
|
goto err_mem_5;
|
|
|
|
if (si->pdata->startup)
|
|
err = si->pdata->startup(si->dev);
|
|
if (err)
|
|
goto err_startup;
|
|
|
|
dev->hard_start_xmit = pxa_irda_hard_xmit;
|
|
dev->open = pxa_irda_start;
|
|
dev->stop = pxa_irda_stop;
|
|
dev->do_ioctl = pxa_irda_ioctl;
|
|
dev->get_stats = pxa_irda_stats;
|
|
|
|
irda_init_max_qos_capabilies(&si->qos);
|
|
|
|
baudrate_mask = 0;
|
|
if (si->pdata->transceiver_cap & IR_SIRMODE)
|
|
baudrate_mask |= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
|
|
if (si->pdata->transceiver_cap & IR_FIRMODE)
|
|
baudrate_mask |= IR_4000000 << 8;
|
|
|
|
si->qos.baud_rate.bits &= baudrate_mask;
|
|
si->qos.min_turn_time.bits = 7; /* 1ms or more */
|
|
|
|
irda_qos_bits_to_value(&si->qos);
|
|
|
|
err = register_netdev(dev);
|
|
|
|
if (err == 0)
|
|
dev_set_drvdata(&pdev->dev, dev);
|
|
|
|
if (err) {
|
|
if (si->pdata->shutdown)
|
|
si->pdata->shutdown(si->dev);
|
|
err_startup:
|
|
kfree(si->tx_buff.head);
|
|
err_mem_5:
|
|
kfree(si->rx_buff.head);
|
|
err_mem_4:
|
|
if (si->sir_clk && !IS_ERR(si->sir_clk))
|
|
clk_put(si->sir_clk);
|
|
if (si->fir_clk && !IS_ERR(si->fir_clk))
|
|
clk_put(si->fir_clk);
|
|
free_netdev(dev);
|
|
err_mem_3:
|
|
release_mem_region(__PREG(FICP), 0x1c);
|
|
err_mem_2:
|
|
release_mem_region(__PREG(STUART), 0x24);
|
|
}
|
|
err_mem_1:
|
|
return err;
|
|
}
|
|
|
|
static int pxa_irda_remove(struct platform_device *_dev)
|
|
{
|
|
struct net_device *dev = platform_get_drvdata(_dev);
|
|
|
|
if (dev) {
|
|
struct pxa_irda *si = netdev_priv(dev);
|
|
unregister_netdev(dev);
|
|
if (si->pdata->shutdown)
|
|
si->pdata->shutdown(si->dev);
|
|
kfree(si->tx_buff.head);
|
|
kfree(si->rx_buff.head);
|
|
clk_put(si->fir_clk);
|
|
clk_put(si->sir_clk);
|
|
free_netdev(dev);
|
|
}
|
|
|
|
release_mem_region(__PREG(STUART), 0x24);
|
|
release_mem_region(__PREG(FICP), 0x1c);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver pxa_ir_driver = {
|
|
.driver = {
|
|
.name = "pxa2xx-ir",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = pxa_irda_probe,
|
|
.remove = pxa_irda_remove,
|
|
.suspend = pxa_irda_suspend,
|
|
.resume = pxa_irda_resume,
|
|
};
|
|
|
|
static int __init pxa_irda_init(void)
|
|
{
|
|
return platform_driver_register(&pxa_ir_driver);
|
|
}
|
|
|
|
static void __exit pxa_irda_exit(void)
|
|
{
|
|
platform_driver_unregister(&pxa_ir_driver);
|
|
}
|
|
|
|
module_init(pxa_irda_init);
|
|
module_exit(pxa_irda_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:pxa2xx-ir");
|