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path: root/drivers/net/irda/pxaficp_ir.c
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Diffstat (limited to 'drivers/net/irda/pxaficp_ir.c')
-rw-r--r--drivers/net/irda/pxaficp_ir.c1076
1 files changed, 0 insertions, 1076 deletions
diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c
deleted file mode 100644
index 1dba16bc7f8d..000000000000
--- a/drivers/net/irda/pxaficp_ir.c
+++ /dev/null
@@ -1,1076 +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/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/dma/pxa-dma.h>
-#include <linux/gpio.h>
-#include <linux/slab.h>
-#include <linux/sched/clock.h>
-
-#include <net/irda/irda.h>
-#include <net/irda/irmod.h>
-#include <net/irda/wrapper.h>
-#include <net/irda/irda_device.h>
-
-#include <linux/platform_data/irda-pxaficp.h>
-#undef __REG
-#define __REG(x) ((x) & 0xffff)
-#include <mach/regs-uart.h>
-
-#define ICCR0 0x0000 /* ICP Control Register 0 */
-#define ICCR1 0x0004 /* ICP Control Register 1 */
-#define ICCR2 0x0008 /* ICP Control Register 2 */
-#define ICDR 0x000c /* ICP Data Register */
-#define ICSR0 0x0014 /* ICP Status Register 0 */
-#define ICSR1 0x0018 /* 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 */
-
-#define ICSR0_EOC (1 << 6) /* DMA End of Descriptor Chain */
-#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)
-
-/* macros for registers read/write */
-#define ficp_writel(irda, val, off) \
- do { \
- dev_vdbg(irda->dev, \
- "%s():%d ficp_writel(0x%x, %s)\n", \
- __func__, __LINE__, (val), #off); \
- writel_relaxed((val), (irda)->irda_base + (off)); \
- } while (0)
-
-#define ficp_readl(irda, off) \
- ({ \
- unsigned int _v; \
- _v = readl_relaxed((irda)->irda_base + (off)); \
- dev_vdbg(irda->dev, \
- "%s():%d ficp_readl(%s): 0x%x\n", \
- __func__, __LINE__, #off, _v); \
- _v; \
- })
-
-#define stuart_writel(irda, val, off) \
- do { \
- dev_vdbg(irda->dev, \
- "%s():%d stuart_writel(0x%x, %s)\n", \
- __func__, __LINE__, (val), #off); \
- writel_relaxed((val), (irda)->stuart_base + (off)); \
- } while (0)
-
-#define stuart_readl(irda, off) \
- ({ \
- unsigned int _v; \
- _v = readl_relaxed((irda)->stuart_base + (off)); \
- dev_vdbg(irda->dev, \
- "%s():%d stuart_readl(%s): 0x%x\n", \
- __func__, __LINE__, #off, _v); \
- _v; \
- })
-
-struct pxa_irda {
- int speed;
- int newspeed;
- unsigned long long last_clk;
-
- void __iomem *stuart_base;
- void __iomem *irda_base;
- 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;
- struct dma_chan *txdma;
- struct dma_chan *rxdma;
- dma_cookie_t rx_cookie;
- dma_cookie_t tx_cookie;
- int drcmr_rx;
- int drcmr_tx;
-
- 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 int pxa_irda_set_speed(struct pxa_irda *si, int speed);
-
-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
-
-static void pxa_irda_fir_dma_rx_irq(void *data);
-static void pxa_irda_fir_dma_tx_irq(void *data);
-
-inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)
-{
- struct dma_async_tx_descriptor *tx;
-
- tx = dmaengine_prep_slave_single(si->rxdma, si->dma_rx_buff_phy,
- IRDA_FRAME_SIZE_LIMIT, DMA_FROM_DEVICE,
- DMA_PREP_INTERRUPT);
- if (!tx) {
- dev_err(si->dev, "prep_slave_sg() failed\n");
- return;
- }
- tx->callback = pxa_irda_fir_dma_rx_irq;
- tx->callback_param = si;
- si->rx_cookie = dmaengine_submit(tx);
- dma_async_issue_pending(si->rxdma);
-}
-
-inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)
-{
- struct dma_async_tx_descriptor *tx;
-
- tx = dmaengine_prep_slave_single(si->txdma, si->dma_tx_buff_phy,
- si->dma_tx_buff_len, DMA_TO_DEVICE,
- DMA_PREP_INTERRUPT);
- if (!tx) {
- dev_err(si->dev, "prep_slave_sg() failed\n");
- return;
- }
- tx->callback = pxa_irda_fir_dma_tx_irq;
- tx->callback_param = si;
- si->tx_cookie = dmaengine_submit(tx);
- dma_async_issue_pending(si->rxdma);
-}
-
-/*
- * 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 */
- dmaengine_terminate_all(si->rxdma);
- /* disable FICP */
- ficp_writel(si, 0, ICCR0);
- 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 */
- stuart_writel(si, 0, STIER);
-
- /* access DLL & DLH */
- stuart_writel(si, stuart_readl(si, STLCR) | LCR_DLAB, STLCR);
- stuart_writel(si, divisor & 0xff, STDLL);
- stuart_writel(si, divisor >> 8, STDLH);
- stuart_writel(si, stuart_readl(si, STLCR) & ~LCR_DLAB, STLCR);
-
- si->speed = speed;
- stuart_writel(si, IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6,
- STISR);
- stuart_writel(si, IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE,
- STIER);
-
- local_irq_restore(flags);
- break;
-
- case 4000000:
- local_irq_save(flags);
-
- /* disable STUART */
- stuart_writel(si, 0, STIER);
- stuart_writel(si, 0, STISR);
- pxa_irda_disable_clk(si);
-
- /* disable FICP first */
- ficp_writel(si, 0, ICCR0);
-
- /* 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);
- ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);
-
- 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 = stuart_readl(si, STIIR);
-
- switch (iir & 0x0F) {
- case 0x06: /* Receiver Line Status */
- lsr = stuart_readl(si, STLSR);
- while (lsr & LSR_FIFOE) {
- data = stuart_readl(si, 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 = stuart_readl(si, STLSR);
- }
- si->last_clk = sched_clock();
- 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,
- stuart_readl(si, STRBR));
- } while (stuart_readl(si, STLSR) & LSR_DR);
- si->last_clk = sched_clock();
- break;
-
- case 0x02: /* Transmit FIFO Data Request */
- while ((si->tx_buff.len) &&
- (stuart_readl(si, STLSR) & LSR_TDRQ)) {
- stuart_writel(si, *si->tx_buff.data++, STTHR);
- 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 ((stuart_readl(si, STLSR) & LSR_TEMT) == 0)
- cpu_relax();
- si->last_clk = sched_clock();
-
- /*
- * 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 */
- stuart_writel(si, IrSR_IR_RECEIVE_ON |
- IrSR_XMODE_PULSE_1_6, STISR);
- /* enable STUART and receive interrupts */
- stuart_writel(si, IER_UUE | IER_RLSE |
- IER_RAVIE | IER_RTIOE, STIER);
- }
- /* I'm hungry! */
- netif_wake_queue(dev);
- }
- break;
- }
-
- return IRQ_HANDLED;
-}
-
-/* FIR Receive DMA interrupt handler */
-static void pxa_irda_fir_dma_rx_irq(void *data)
-{
- struct net_device *dev = data;
- struct pxa_irda *si = netdev_priv(dev);
-
- dmaengine_terminate_all(si->rxdma);
- netdev_dbg(dev, "pxa_ir: fir rx dma bus error\n");
-}
-
-/* FIR Transmit DMA interrupt handler */
-static void pxa_irda_fir_dma_tx_irq(void *data)
-{
- struct net_device *dev = data;
- struct pxa_irda *si = netdev_priv(dev);
-
- dmaengine_terminate_all(si->txdma);
- if (dmaengine_tx_status(si->txdma, si->tx_cookie, NULL) == DMA_ERROR) {
- dev->stats.tx_errors++;
- } else {
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += si->dma_tx_buff_len;
- }
-
- while (ficp_readl(si, ICSR1) & ICSR1_TBY)
- cpu_relax();
- si->last_clk = sched_clock();
-
- /*
- * 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;
-
- ficp_writel(si, 0, ICCR0);
- pxa_irda_fir_dma_rx_start(si);
- while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--)
- ficp_readl(si, ICDR);
- ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);
-
- 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;
- struct dma_tx_state state;
-
- /* Get the current data position. */
-
- dmaengine_tx_status(si->rxdma, si->rx_cookie, &state);
- len = IRDA_FRAME_SIZE_LIMIT - state.residue;
-
- do {
- /* Read Status, and then Data. */
- stat = ficp_readl(si, ICSR1);
- rmb();
- data = ficp_readl(si, 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 (ficp_readl(si, 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 */
- dmaengine_terminate_all(si->rxdma);
- si->last_clk = sched_clock();
- icsr0 = ficp_readl(si, 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++;
- }
- ficp_writel(si, icsr0 & (ICSR0_FRE | ICSR0_RAB), ICSR0);
- }
-
- if (icsr0 & ICSR0_EIF) {
- /* An error in FIFO occurred, or there is a end of frame */
- pxa_irda_fir_irq_eif(si, dev, icsr0);
- }
-
- ficp_writel(si, 0, ICCR0);
- pxa_irda_fir_dma_rx_start(si);
- while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--)
- ficp_readl(si, ICDR);
- ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);
-
- 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. */
- stuart_writel(si, 0, STIER);
- stuart_writel(si, IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6,
- STISR);
-
- /* enable STUART and transmit interrupts */
- stuart_writel(si, IER_UUE | IER_TIE, STIER);
- } 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 ((sched_clock() - si->last_clk) * 1000 < mtt)
- cpu_relax();
-
- /* stop RX DMA, disable FICP */
- dmaengine_terminate_all(si->rxdma);
- ficp_writel(si, 0, ICCR0);
-
- pxa_irda_fir_dma_tx_start(si);
- ficp_writel(si, ICCR0_ITR | ICCR0_TXE, ICCR0);
- }
-
- 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 */
- stuart_writel(si, 0, STIER);
- /* enable STUART interrupt to the processor */
- stuart_writel(si, MCR_OUT2, STMCR);
- /* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */
- stuart_writel(si, LCR_WLS0 | LCR_WLS1, STLCR);
- /* enable FIFO, we use FIFO to improve performance */
- stuart_writel(si, FCR_TRFIFOE | FCR_ITL_32, STFCR);
-
- /* disable FICP */
- ficp_writel(si, 0, ICCR0);
- /* configure FICP ICCR2 */
- ficp_writel(si, ICCR2_TXP | ICCR2_TRIG_32, ICCR2);
-
- /* 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 */
- stuart_writel(si, 0, STIER);
- /* disable STUART SIR mode */
- stuart_writel(si, 0, STISR);
-
- /* disable DMA */
- dmaengine_terminate_all(si->rxdma);
- dmaengine_terminate_all(si->txdma);
- /* disable FICP */
- ficp_writel(si, 0, ICCR0);
-
- /* disable the STUART or FICP clocks */
- pxa_irda_disable_clk(si);
-
- 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);
- dma_cap_mask_t mask;
- struct dma_slave_config config;
- struct pxad_param param;
- 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;
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
- param.prio = PXAD_PRIO_LOWEST;
-
- memset(&config, 0, sizeof(config));
- config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
- config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
- config.src_addr = (dma_addr_t)si->irda_base + ICDR;
- config.dst_addr = (dma_addr_t)si->irda_base + ICDR;
- config.src_maxburst = 32;
- config.dst_maxburst = 32;
-
- param.drcmr = si->drcmr_rx;
- si->rxdma = dma_request_slave_channel_compat(mask, pxad_filter_fn,
- &param, &dev->dev, "rx");
- if (!si->rxdma)
- goto err_rx_dma;
-
- param.drcmr = si->drcmr_tx;
- si->txdma = dma_request_slave_channel_compat(mask, pxad_filter_fn,
- &param, &dev->dev, "tx");
- if (!si->txdma)
- goto err_tx_dma;
-
- err = dmaengine_slave_config(si->rxdma, &config);
- if (err)
- goto err_dma_rx_buff;
- err = dmaengine_slave_config(si->txdma, &config);
- if (err)
- goto err_dma_rx_buff;
-
- 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:
- dma_release_channel(si->txdma);
-err_tx_dma:
- dma_release_channel(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);
-
- dmaengine_terminate_all(si->rxdma);
- dmaengine_terminate_all(si->txdma);
- dma_release_channel(si->rxdma);
- dma_release_channel(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 resource *res;
- struct pxa_irda *si;
- void __iomem *ficp, *stuart;
- unsigned int baudrate_mask;
- int err;
-
- if (!pdev->dev.platform_data)
- return -ENODEV;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- ficp = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(ficp)) {
- dev_err(&pdev->dev, "resource ficp not defined\n");
- return PTR_ERR(ficp);
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- stuart = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(stuart)) {
- dev_err(&pdev->dev, "resource stuart not defined\n");
- return PTR_ERR(stuart);
- }
-
- dev = alloc_irdadev(sizeof(struct pxa_irda));
- if (!dev) {
- err = -ENOMEM;
- goto err_mem_1;
- }
-
- SET_NETDEV_DEV(dev, &pdev->dev);
- si = netdev_priv(dev);
- si->dev = &pdev->dev;
- si->pdata = pdev->dev.platform_data;
-
- si->irda_base = ficp;
- si->stuart_base = stuart;
- si->uart_irq = platform_get_irq(pdev, 0);
- si->icp_irq = platform_get_irq(pdev, 1);
-
- si->sir_clk = devm_clk_get(&pdev->dev, "UARTCLK");
- si->fir_clk = devm_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;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (res)
- si->drcmr_rx = res->start;
- res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (res)
- si->drcmr_tx = res->start;
-
- /*
- * 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)
- platform_set_drvdata(pdev, 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:
- free_netdev(dev);
- }
-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);
- free_netdev(dev);
- }
-
- return 0;
-}
-
-static struct platform_driver pxa_ir_driver = {
- .driver = {
- .name = "pxa2xx-ir",
- },
- .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");