![Eric Miao](/assets/img/avatar_default.png)
1. DRCMRxx is no longer recommended, use DRCMR(xx) instead, and pass DRCMR index by "struct resource" if possible 2. DCSRxx, DDADRxx, DSADRxx, DTADRxx, DCMDxx is never used, use DCSR(), DDADR(), DSADR(), DTADR(), DCMD() instead Signed-off-by: Eric Miao <eric.miao@marvell.com> Acked-by: Nicolas Pitre <nico@cam.org> 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 <mach/irda.h>
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#include <mach/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();
|
|
|
|
/* stop RX DMA, disable FICP */
|
|
DCSR(si->rxdma) &= ~DCSR_RUN;
|
|
ICCR0 = 0;
|
|
|
|
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 */
|
|
DRCMR(17) = si->rxdma | DRCMR_MAPVLD;
|
|
DRCMR(18) = 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);
|
|
|
|
DRCMR(17) = 0;
|
|
DRCMR(18) = 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");
|