diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/irda/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/net/irda/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/irda/pxaficp_ir.c | 871 |
3 files changed, 882 insertions, 0 deletions
diff --git a/drivers/net/irda/Kconfig b/drivers/net/irda/Kconfig index ca5914091d3..d54156f11e6 100644 --- a/drivers/net/irda/Kconfig +++ b/drivers/net/irda/Kconfig @@ -400,5 +400,15 @@ config VIA_FIR To compile it as a module, choose M here: the module will be called via-ircc. +config PXA_FICP + tristate "Intel PXA2xx Internal FICP" + depends on ARCH_PXA && IRDA + help + Say Y or M here if you want to build support for the PXA2xx + built-in IRDA interface which can support both SIR and FIR. + This driver relies on platform specific helper routines so + available capabilities may vary from one PXA2xx target to + another. + endmenu diff --git a/drivers/net/irda/Makefile b/drivers/net/irda/Makefile index 29a8bd812b2..e7a8b7f7f5d 100644 --- a/drivers/net/irda/Makefile +++ b/drivers/net/irda/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_SMC_IRCC_FIR) += smsc-ircc2.o obj-$(CONFIG_ALI_FIR) += ali-ircc.o obj-$(CONFIG_VLSI_FIR) += vlsi_ir.o obj-$(CONFIG_VIA_FIR) += via-ircc.o +obj-$(CONFIG_PXA_FICP) += pxaficp_ir.o # Old dongle drivers for old SIR drivers obj-$(CONFIG_ESI_DONGLE_OLD) += esi.o obj-$(CONFIG_TEKRAM_DONGLE_OLD) += tekram.o diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c new file mode 100644 index 00000000000..aef80f5e7c9 --- /dev/null +++ b/drivers/net/irda/pxaficp_ir.c @@ -0,0 +1,871 @@ +/* + * linux/drivers/net/irda/pxaficp_ir.c + * + * Based on sa1100_ir.c by Russell King + * + * Changes copyright (C) 2003-2005 MontaVista Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Infra-red driver (SIR/FIR) for the PXA2xx embedded microprocessor + * + */ +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/netdevice.h> +#include <linux/slab.h> +#include <linux/rtnetlink.h> +#include <linux/interrupt.h> +#include <linux/dma-mapping.h> +#include <linux/pm.h> + +#include <net/irda/irda.h> +#include <net/irda/irmod.h> +#include <net/irda/wrapper.h> +#include <net/irda/irda_device.h> + +#include <asm/irq.h> +#include <asm/dma.h> +#include <asm/delay.h> +#include <asm/hardware.h> +#include <asm/arch/irda.h> +#include <asm/arch/pxa-regs.h> + +#ifdef CONFIG_MACH_MAINSTONE +#include <asm/arch/mainstone.h> +#endif + +#define IrSR_RXPL_NEG_IS_ZERO (1<<4) +#define IrSR_RXPL_POS_IS_ZERO 0x0 +#define IrSR_TXPL_NEG_IS_ZERO (1<<3) +#define IrSR_TXPL_POS_IS_ZERO 0x0 +#define IrSR_XMODE_PULSE_1_6 (1<<2) +#define IrSR_XMODE_PULSE_3_16 0x0 +#define IrSR_RCVEIR_IR_MODE (1<<1) +#define IrSR_RCVEIR_UART_MODE 0x0 +#define IrSR_XMITIR_IR_MODE (1<<0) +#define IrSR_XMITIR_UART_MODE 0x0 + +#define IrSR_IR_RECEIVE_ON (\ + IrSR_RXPL_NEG_IS_ZERO | \ + IrSR_TXPL_POS_IS_ZERO | \ + IrSR_XMODE_PULSE_3_16 | \ + IrSR_RCVEIR_IR_MODE | \ + IrSR_XMITIR_UART_MODE) + +#define IrSR_IR_TRANSMIT_ON (\ + IrSR_RXPL_NEG_IS_ZERO | \ + IrSR_TXPL_POS_IS_ZERO | \ + IrSR_XMODE_PULSE_3_16 | \ + IrSR_RCVEIR_UART_MODE | \ + IrSR_XMITIR_IR_MODE) + +struct pxa_irda { + int speed; + int newspeed; + unsigned long last_oscr; + + unsigned char *dma_rx_buff; + unsigned char *dma_tx_buff; + dma_addr_t dma_rx_buff_phy; + dma_addr_t dma_tx_buff_phy; + unsigned int dma_tx_buff_len; + int txdma; + int rxdma; + + struct net_device_stats stats; + struct irlap_cb *irlap; + struct qos_info qos; + + iobuff_t tx_buff; + iobuff_t rx_buff; + + struct device *dev; + struct pxaficp_platform_data *pdata; +}; + + +#define IS_FIR(si) ((si)->speed >= 4000000) +#define IRDA_FRAME_SIZE_LIMIT 2047 + +inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si) +{ + DCSR(si->rxdma) = DCSR_NODESC; + DSADR(si->rxdma) = __PREG(ICDR); + DTADR(si->rxdma) = si->dma_rx_buff_phy; + DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC | DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT; + DCSR(si->rxdma) |= DCSR_RUN; +} + +inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si) +{ + DCSR(si->txdma) = DCSR_NODESC; + DSADR(si->txdma) = si->dma_tx_buff_phy; + DTADR(si->txdma) = __PREG(ICDR); + DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG | DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len; + DCSR(si->txdma) |= DCSR_RUN; +} + +/* + * Set the IrDA communications speed. + */ +static int pxa_irda_set_speed(struct pxa_irda *si, int speed) +{ + unsigned long flags; + unsigned int divisor; + + switch (speed) { + case 9600: case 19200: case 38400: + case 57600: case 115200: + + /* refer to PXA250/210 Developer's Manual 10-7 */ + /* BaudRate = 14.7456 MHz / (16*Divisor) */ + divisor = 14745600 / (16 * speed); + + local_irq_save(flags); + + if (IS_FIR(si)) { + /* stop RX DMA */ + DCSR(si->rxdma) &= ~DCSR_RUN; + /* disable FICP */ + ICCR0 = 0; + pxa_set_cken(CKEN13_FICP, 0); + + /* set board transceiver to SIR mode */ + si->pdata->transceiver_mode(si->dev, IR_SIRMODE); + + /* configure GPIO46/47 */ + pxa_gpio_mode(GPIO46_STRXD_MD); + pxa_gpio_mode(GPIO47_STTXD_MD); + + /* enable the STUART clock */ + pxa_set_cken(CKEN5_STUART, 1); + } + + /* disable STUART first */ + STIER = 0; + + /* access DLL & DLH */ + STLCR |= LCR_DLAB; + STDLL = divisor & 0xff; + STDLH = divisor >> 8; + STLCR &= ~LCR_DLAB; + + si->speed = speed; + STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; + STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; + + local_irq_restore(flags); + break; + + case 4000000: + local_irq_save(flags); + + /* disable STUART */ + STIER = 0; + STISR = 0; + pxa_set_cken(CKEN5_STUART, 0); + + /* disable FICP first */ + ICCR0 = 0; + + /* set board transceiver to FIR mode */ + si->pdata->transceiver_mode(si->dev, IR_FIRMODE); + + /* configure GPIO46/47 */ + pxa_gpio_mode(GPIO46_ICPRXD_MD); + pxa_gpio_mode(GPIO47_ICPTXD_MD); + + /* enable the FICP clock */ + pxa_set_cken(CKEN13_FICP, 1); + + si->speed = speed; + pxa_irda_fir_dma_rx_start(si); + ICCR0 = ICCR0_ITR | ICCR0_RXE; + + local_irq_restore(flags); + break; + + default: + return -EINVAL; + } + + return 0; +} + +/* SIR interrupt service routine. */ +static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct pxa_irda *si = netdev_priv(dev); + int iir, lsr, data; + + iir = STIIR; + + switch (iir & 0x0F) { + case 0x06: /* Receiver Line Status */ + lsr = STLSR; + while (lsr & LSR_FIFOE) { + data = STRBR; + if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) { + printk(KERN_DEBUG "pxa_ir: sir receiving error\n"); + si->stats.rx_errors++; + if (lsr & LSR_FE) + si->stats.rx_frame_errors++; + if (lsr & LSR_OE) + si->stats.rx_fifo_errors++; + } else { + si->stats.rx_bytes++; + async_unwrap_char(dev, &si->stats, &si->rx_buff, data); + } + lsr = STLSR; + } + dev->last_rx = jiffies; + si->last_oscr = OSCR; + break; + + case 0x04: /* Received Data Available */ + /* forth through */ + + case 0x0C: /* Character Timeout Indication */ + do { + si->stats.rx_bytes++; + async_unwrap_char(dev, &si->stats, &si->rx_buff, STRBR); + } while (STLSR & LSR_DR); + dev->last_rx = jiffies; + si->last_oscr = OSCR; + break; + + case 0x02: /* Transmit FIFO Data Request */ + while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) { + STTHR = *si->tx_buff.data++; + si->tx_buff.len -= 1; + } + + if (si->tx_buff.len == 0) { + si->stats.tx_packets++; + si->stats.tx_bytes += si->tx_buff.data - + si->tx_buff.head; + + /* We need to ensure that the transmitter has finished. */ + while ((STLSR & LSR_TEMT) == 0) + cpu_relax(); + si->last_oscr = OSCR; + + /* + * Ok, we've finished transmitting. Now enable + * the receiver. Sometimes we get a receive IRQ + * immediately after a transmit... + */ + if (si->newspeed) { + pxa_irda_set_speed(si, si->newspeed); + si->newspeed = 0; + } else { + /* enable IR Receiver, disable IR Transmitter */ + STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6; + /* enable STUART and receive interrupts */ + STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE; + } + /* I'm hungry! */ + netif_wake_queue(dev); + } + break; + } + + return IRQ_HANDLED; +} + +/* FIR Receive DMA interrupt handler */ +static void pxa_irda_fir_dma_rx_irq(int channel, void *data, struct pt_regs *regs) +{ + int dcsr = DCSR(channel); + + DCSR(channel) = dcsr & ~DCSR_RUN; + + printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr); +} + +/* FIR Transmit DMA interrupt handler */ +static void pxa_irda_fir_dma_tx_irq(int channel, void *data, struct pt_regs *regs) +{ + struct net_device *dev = data; + struct pxa_irda *si = netdev_priv(dev); + int dcsr; + + dcsr = DCSR(channel); + DCSR(channel) = dcsr & ~DCSR_RUN; + + if (dcsr & DCSR_ENDINTR) { + si->stats.tx_packets++; + si->stats.tx_bytes += si->dma_tx_buff_len; + } else { + si->stats.tx_errors++; + } + + while (ICSR1 & ICSR1_TBY) + cpu_relax(); + si->last_oscr = OSCR; + + /* + * HACK: It looks like the TBY bit is dropped too soon. + * Without this delay things break. + */ + udelay(120); + + if (si->newspeed) { + pxa_irda_set_speed(si, si->newspeed); + si->newspeed = 0; + } else { + ICCR0 = 0; + pxa_irda_fir_dma_rx_start(si); + ICCR0 = ICCR0_ITR | ICCR0_RXE; + } + netif_wake_queue(dev); +} + +/* EIF(Error in FIFO/End in Frame) handler for FIR */ +static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev) +{ + unsigned int len, stat, data; + + /* Get the current data position. */ + len = DTADR(si->rxdma) - si->dma_rx_buff_phy; + + do { + /* Read Status, and then Data. */ + stat = ICSR1; + rmb(); + data = ICDR; + + if (stat & (ICSR1_CRE | ICSR1_ROR)) { + si->stats.rx_errors++; + if (stat & ICSR1_CRE) { + printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n"); + si->stats.rx_crc_errors++; + } + if (stat & ICSR1_ROR) { + printk(KERN_DEBUG "pxa_ir: fir receive overrun\n"); + si->stats.rx_frame_errors++; + } + } else { + si->dma_rx_buff[len++] = data; + } + /* If we hit the end of frame, there's no point in continuing. */ + if (stat & ICSR1_EOF) + break; + } while (ICSR0 & ICSR0_EIF); + + if (stat & ICSR1_EOF) { + /* end of frame. */ + struct sk_buff *skb = alloc_skb(len+1,GFP_ATOMIC); + if (!skb) { + printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n"); + si->stats.rx_dropped++; + return; + } + + /* Align IP header to 20 bytes */ + skb_reserve(skb, 1); + memcpy(skb->data, si->dma_rx_buff, len); + skb_put(skb, len); + + /* Feed it to IrLAP */ + skb->dev = dev; + skb->mac.raw = skb->data; + skb->protocol = htons(ETH_P_IRDA); + netif_rx(skb); + + si->stats.rx_packets++; + si->stats.rx_bytes += len; + + dev->last_rx = jiffies; + } +} + +/* FIR interrupt handler */ +static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct pxa_irda *si = netdev_priv(dev); + int icsr0; + + /* stop RX DMA */ + DCSR(si->rxdma) &= ~DCSR_RUN; + si->last_oscr = OSCR; + icsr0 = ICSR0; + + if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) { + if (icsr0 & ICSR0_FRE) { + printk(KERN_DEBUG "pxa_ir: fir receive frame error\n"); + si->stats.rx_frame_errors++; + } else { + printk(KERN_DEBUG "pxa_ir: fir receive abort\n"); + si->stats.rx_errors++; + } + ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB); + } + + if (icsr0 & ICSR0_EIF) { + /* An error in FIFO occured, or there is a end of frame */ + pxa_irda_fir_irq_eif(si, dev); + } + + ICCR0 = 0; + pxa_irda_fir_dma_rx_start(si); + ICCR0 = ICCR0_ITR | ICCR0_RXE; + + return IRQ_HANDLED; +} + +/* hard_xmit interface of irda device */ +static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct pxa_irda *si = netdev_priv(dev); + int speed = irda_get_next_speed(skb); + + /* + * Does this packet contain a request to change the interface + * speed? If so, remember it until we complete the transmission + * of this frame. + */ + if (speed != si->speed && speed != -1) + si->newspeed = speed; + + /* + * If this is an empty frame, we can bypass a lot. + */ + if (skb->len == 0) { + if (si->newspeed) { + si->newspeed = 0; + pxa_irda_set_speed(si, speed); + } + dev_kfree_skb(skb); + return 0; + } + + netif_stop_queue(dev); + + if (!IS_FIR(si)) { + si->tx_buff.data = si->tx_buff.head; + si->tx_buff.len = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize); + + /* Disable STUART interrupts and switch to transmit mode. */ + STIER = 0; + STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6; + + /* enable STUART and transmit interrupts */ + STIER = IER_UUE | IER_TIE; + } else { + unsigned long mtt = irda_get_mtt(skb); + + si->dma_tx_buff_len = skb->len; + memcpy(si->dma_tx_buff, skb->data, skb->len); + + if (mtt) + while ((unsigned)(OSCR - si->last_oscr)/4 < mtt) + 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 */ + 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 the STUART clock */ + pxa_set_cken(CKEN5_STUART, 0); + + /* disable DMA */ + DCSR(si->txdma) &= ~DCSR_RUN; + DCSR(si->rxdma) &= ~DCSR_RUN; + /* disable FICP */ + ICCR0 = 0; + /* disable the FICP clock */ + pxa_set_cken(CKEN13_FICP, 0); + + 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 device *_dev, pm_message_t state, u32 level) +{ + struct net_device *dev = dev_get_drvdata(_dev); + struct pxa_irda *si; + + if (!dev || level != SUSPEND_DISABLE) + return 0; + + if (netif_running(dev)) { + si = netdev_priv(dev); + netif_device_detach(dev); + pxa_irda_shutdown(si); + } + + return 0; +} + +static int pxa_irda_resume(struct device *_dev, u32 level) +{ + struct net_device *dev = dev_get_drvdata(_dev); + struct pxa_irda *si; + + if (!dev || level != RESUME_ENABLE) + return 0; + + if (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 device *_dev) +{ + struct platform_device *pdev = to_platform_device(_dev); + 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; + + /* + * 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; + + 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) { + kfree(si->tx_buff.head); +err_mem_5: + kfree(si->rx_buff.head); +err_mem_4: + 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 device *_dev) +{ + struct net_device *dev = dev_get_drvdata(_dev); + + if (dev) { + struct pxa_irda *si = netdev_priv(dev); + unregister_netdev(dev); + kfree(si->tx_buff.head); + kfree(si->rx_buff.head); + free_netdev(dev); + } + + release_mem_region(__PREG(STUART), 0x24); + release_mem_region(__PREG(FICP), 0x1c); + + return 0; +} + +static struct device_driver pxa_ir_driver = { + .name = "pxa2xx-ir", + .bus = &platform_bus_type, + .probe = pxa_irda_probe, + .remove = pxa_irda_remove, + .suspend = pxa_irda_suspend, + .resume = pxa_irda_resume, +}; + +static int __init pxa_irda_init(void) +{ + return driver_register(&pxa_ir_driver); +} + +static void __exit pxa_irda_exit(void) +{ + driver_unregister(&pxa_ir_driver); +} + +module_init(pxa_irda_init); +module_exit(pxa_irda_exit); + +MODULE_LICENSE("GPL"); |