diff options
Diffstat (limited to 'drivers/net/irda/pxaficp_ir.c')
| -rw-r--r-- | drivers/net/irda/pxaficp_ir.c | 980 |
1 files changed, 0 insertions, 980 deletions
diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c deleted file mode 100644 index 964b116a0ab7..000000000000 --- a/drivers/net/irda/pxaficp_ir.c +++ /dev/null @@ -1,980 +0,0 @@ -/* - * 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/dma-mapping.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/platform_device.h> -#include <linux/clk.h> -#include <linux/gpio.h> -#include <linux/slab.h> - -#include <net/irda/irda.h> -#include <net/irda/irmod.h> -#include <net/irda/wrapper.h> -#include <net/irda/irda_device.h> - -#include <mach/dma.h> -#include <linux/platform_data/irda-pxaficp.h> -#include <mach/regs-ost.h> -#include <mach/regs-uart.h> - -#define FICP __REG(0x40800000) /* Start of FICP area */ -#define ICCR0 __REG(0x40800000) /* ICP Control Register 0 */ -#define ICCR1 __REG(0x40800004) /* ICP Control Register 1 */ -#define ICCR2 __REG(0x40800008) /* ICP Control Register 2 */ -#define ICDR __REG(0x4080000c) /* ICP Data Register */ -#define ICSR0 __REG(0x40800014) /* ICP Status Register 0 */ -#define ICSR1 __REG(0x40800018) /* ICP Status Register 1 */ - -#define ICCR0_AME (1 << 7) /* Address match enable */ -#define ICCR0_TIE (1 << 6) /* Transmit FIFO interrupt enable */ -#define ICCR0_RIE (1 << 5) /* Receive FIFO interrupt enable */ -#define ICCR0_RXE (1 << 4) /* Receive enable */ -#define ICCR0_TXE (1 << 3) /* Transmit enable */ -#define ICCR0_TUS (1 << 2) /* Transmit FIFO underrun select */ -#define ICCR0_LBM (1 << 1) /* Loopback mode */ -#define ICCR0_ITR (1 << 0) /* IrDA transmission */ - -#define ICCR2_RXP (1 << 3) /* Receive Pin Polarity select */ -#define ICCR2_TXP (1 << 2) /* Transmit Pin Polarity select */ -#define ICCR2_TRIG (3 << 0) /* Receive FIFO Trigger threshold */ -#define ICCR2_TRIG_8 (0 << 0) /* >= 8 bytes */ -#define ICCR2_TRIG_16 (1 << 0) /* >= 16 bytes */ -#define ICCR2_TRIG_32 (2 << 0) /* >= 32 bytes */ - -#ifdef CONFIG_PXA27x -#define ICSR0_EOC (1 << 6) /* DMA End of Descriptor Chain */ -#endif -#define ICSR0_FRE (1 << 5) /* Framing error */ -#define ICSR0_RFS (1 << 4) /* Receive FIFO service request */ -#define ICSR0_TFS (1 << 3) /* Transnit FIFO service request */ -#define ICSR0_RAB (1 << 2) /* Receiver abort */ -#define ICSR0_TUR (1 << 1) /* Trunsmit FIFO underun */ -#define ICSR0_EIF (1 << 0) /* End/Error in FIFO */ - -#define ICSR1_ROR (1 << 6) /* Receiver FIFO underrun */ -#define ICSR1_CRE (1 << 5) /* CRC error */ -#define ICSR1_EOF (1 << 4) /* End of frame */ -#define ICSR1_TNF (1 << 3) /* Transmit FIFO not full */ -#define ICSR1_RNE (1 << 2) /* Receive FIFO not empty */ -#define ICSR1_TBY (1 << 1) /* Tramsmiter busy flag */ -#define ICSR1_RSY (1 << 0) /* Recevier synchronized flag */ - -#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; - - int uart_irq; - int icp_irq; - - struct irlap_cb *irlap; - struct qos_info qos; - - iobuff_t tx_buff; - iobuff_t rx_buff; - - struct device *dev; - struct pxaficp_platform_data *pdata; - struct clk *fir_clk; - struct clk *sir_clk; - struct clk *cur_clk; -}; - -static inline void pxa_irda_disable_clk(struct pxa_irda *si) -{ - if (si->cur_clk) - clk_disable_unprepare(si->cur_clk); - si->cur_clk = NULL; -} - -static inline void pxa_irda_enable_firclk(struct pxa_irda *si) -{ - si->cur_clk = si->fir_clk; - clk_prepare_enable(si->fir_clk); -} - -static inline void pxa_irda_enable_sirclk(struct pxa_irda *si) -{ - si->cur_clk = si->sir_clk; - clk_prepare_enable(si->sir_clk); -} - - -#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 mode. - */ -static void pxa_irda_set_mode(struct pxa_irda *si, int mode) -{ - if (si->pdata->transceiver_mode) - si->pdata->transceiver_mode(si->dev, mode); - else { - if (gpio_is_valid(si->pdata->gpio_pwdown)) - gpio_set_value(si->pdata->gpio_pwdown, - !(mode & IR_OFF) ^ - !si->pdata->gpio_pwdown_inverted); - pxa2xx_transceiver_mode(si->dev, mode); - } -} - -/* - * 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_irda_disable_clk(si); - - /* set board transceiver to SIR mode */ - pxa_irda_set_mode(si, IR_SIRMODE); - - /* enable the STUART clock */ - pxa_irda_enable_sirclk(si); - } - - /* 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_irda_disable_clk(si); - - /* disable FICP first */ - ICCR0 = 0; - - /* set board transceiver to FIR mode */ - pxa_irda_set_mode(si, IR_FIRMODE); - - /* enable the FICP clock */ - pxa_irda_enable_firclk(si); - - 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 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"); - dev->stats.rx_errors++; - if (lsr & LSR_FE) - dev->stats.rx_frame_errors++; - if (lsr & LSR_OE) - dev->stats.rx_fifo_errors++; - } else { - dev->stats.rx_bytes++; - async_unwrap_char(dev, &dev->stats, - &si->rx_buff, data); - } - lsr = STLSR; - } - si->last_oscr = readl_relaxed(OSCR); - break; - - case 0x04: /* Received Data Available */ - /* forth through */ - - case 0x0C: /* Character Timeout Indication */ - do { - dev->stats.rx_bytes++; - async_unwrap_char(dev, &dev->stats, &si->rx_buff, STRBR); - } while (STLSR & LSR_DR); - si->last_oscr = readl_relaxed(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) { - dev->stats.tx_packets++; - dev->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 = readl_relaxed(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) -{ - 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 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) { - dev->stats.tx_packets++; - dev->stats.tx_bytes += si->dma_tx_buff_len; - } else { - dev->stats.tx_errors++; - } - - while (ICSR1 & ICSR1_TBY) - cpu_relax(); - si->last_oscr = readl_relaxed(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 { - int i = 64; - - ICCR0 = 0; - pxa_irda_fir_dma_rx_start(si); - while ((ICSR1 & ICSR1_RNE) && i--) - (void)ICDR; - ICCR0 = ICCR0_ITR | ICCR0_RXE; - - if (i < 0) - printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); - } - 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, int icsr0) -{ - 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)) { - dev->stats.rx_errors++; - if (stat & ICSR1_CRE) { - printk(KERN_DEBUG "pxa_ir: fir receive CRC error\n"); - dev->stats.rx_crc_errors++; - } - if (stat & ICSR1_ROR) { - printk(KERN_DEBUG "pxa_ir: fir receive overrun\n"); - dev->stats.rx_over_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; - - if (icsr0 & ICSR0_FRE) { - printk(KERN_ERR "pxa_ir: dropping erroneous frame\n"); - dev->stats.rx_dropped++; - return; - } - - skb = alloc_skb(len+1,GFP_ATOMIC); - if (!skb) { - printk(KERN_ERR "pxa_ir: fir out of memory for receive skb\n"); - dev->stats.rx_dropped++; - return; - } - - /* Align IP header to 20 bytes */ - skb_reserve(skb, 1); - skb_copy_to_linear_data(skb, si->dma_rx_buff, len); - skb_put(skb, len); - - /* Feed it to IrLAP */ - skb->dev = dev; - skb_reset_mac_header(skb); - skb->protocol = htons(ETH_P_IRDA); - netif_rx(skb); - - dev->stats.rx_packets++; - dev->stats.rx_bytes += len; - } -} - -/* FIR interrupt handler */ -static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct pxa_irda *si = netdev_priv(dev); - int icsr0, i = 64; - - /* stop RX DMA */ - DCSR(si->rxdma) &= ~DCSR_RUN; - si->last_oscr = readl_relaxed(OSCR); - icsr0 = ICSR0; - - if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) { - if (icsr0 & ICSR0_FRE) { - printk(KERN_DEBUG "pxa_ir: fir receive frame error\n"); - dev->stats.rx_frame_errors++; - } else { - printk(KERN_DEBUG "pxa_ir: fir receive abort\n"); - dev->stats.rx_errors++; - } - ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB); - } - - if (icsr0 & ICSR0_EIF) { - /* An error in FIFO occurred, or there is a end of frame */ - pxa_irda_fir_irq_eif(si, dev, icsr0); - } - - ICCR0 = 0; - pxa_irda_fir_dma_rx_start(si); - while ((ICSR1 & ICSR1_RNE) && i--) - (void)ICDR; - ICCR0 = ICCR0_ITR | ICCR0_RXE; - - if (i < 0) - printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n"); - - 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 NETDEV_TX_OK; - } - - 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; - skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len); - - if (mtt) - while ((unsigned)(readl_relaxed(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); - return NETDEV_TX_OK; -} - -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 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 */ - pxa_irda_set_mode(si, 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(si->uart_irq, pxa_irda_sir_irq, 0, dev->name, dev); - if (err) - goto err_irq1; - - err = request_irq(si->icp_irq, pxa_irda_fir_irq, 0, dev->name, dev); - if (err) - goto err_irq2; - - /* - * The interrupt must remain disabled for now. - */ - disable_irq(si->uart_irq); - disable_irq(si->icp_irq); - - 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(si->uart_irq); - enable_irq(si->icp_irq); - 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(si->icp_irq, dev); -err_irq2: - free_irq(si->uart_irq, 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(si->uart_irq, dev); - free_irq(si->icp_irq, 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 const struct net_device_ops pxa_irda_netdev_ops = { - .ndo_open = pxa_irda_start, - .ndo_stop = pxa_irda_stop, - .ndo_start_xmit = pxa_irda_hard_xmit, - .ndo_do_ioctl = pxa_irda_ioctl, -}; - -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) { - err = -ENOMEM; - goto err_mem_3; - } - - SET_NETDEV_DEV(dev, &pdev->dev); - si = netdev_priv(dev); - si->dev = &pdev->dev; - si->pdata = pdev->dev.platform_data; - - si->uart_irq = platform_get_irq(pdev, 0); - si->icp_irq = platform_get_irq(pdev, 1); - - 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 (gpio_is_valid(si->pdata->gpio_pwdown)) { - err = gpio_request(si->pdata->gpio_pwdown, "IrDA switch"); - if (err) - goto err_startup; - err = gpio_direction_output(si->pdata->gpio_pwdown, - !si->pdata->gpio_pwdown_inverted); - if (err) { - gpio_free(si->pdata->gpio_pwdown); - goto err_startup; - } - } - - if (si->pdata->startup) { - err = si->pdata->startup(si->dev); - if (err) - goto err_startup; - } - - if (gpio_is_valid(si->pdata->gpio_pwdown) && si->pdata->startup) - dev_warn(si->dev, "gpio_pwdown and startup() both defined!\n"); - - dev->netdev_ops = &pxa_irda_netdev_ops; - - 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 (gpio_is_valid(si->pdata->gpio_pwdown)) - gpio_free(si->pdata->gpio_pwdown); - 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, -}; - -module_platform_driver(pxa_ir_driver); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:pxa2xx-ir"); |